2023 |
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| 417. | Young-Geun Kang; Seong-Ook Park A Full-Aperture Frequency Scaling Algorithm for Processing Dechirped Sliding Spotlight SAR Data Journal Article IEEE Access, 11 , pp. 92550-92564, 2023. Abstract | Links | BibTeX | 태그: International @article{Kang2023b, title = {A Full-Aperture Frequency Scaling Algorithm for Processing Dechirped Sliding Spotlight SAR Data}, author = {Young-Geun Kang and Seong-Ook Park}, url = {http://ma.kaist.ac.kr/wp-content/uploads/2023/09/A-Full-Aperture-Frequency-Scaling-Algorithm-for-Processing-Dechirped-Sliding-Spotlight-SAR-Data.pdf}, doi = {10.1109/ACCESS.2023.3308906}, year = {2023}, date = {2023-08-28}, journal = {IEEE Access}, volume = {11}, pages = {92550-92564}, abstract = {This paper proposes a full-aperture method for processing sliding spotlight synthetic aperture radar (SAR) data with dechirp-on-receive. The frequency scaling algorithm (FSA) efficiently processes the dechirped signals because the range cell migration correction (RCMC) process involves removing the residual video phase. However, the conventional FSA combined with the sub-aperture method is unsuitable for processing sliding mode data because the azimuth extent of the SAR image is limited by the system pulse repetition frequency. In addition, the azimuth compression performance deteriorates as the range displacement increases from the center of the SAR image. To address these problems, we developed a modified full-aperture FSA for sliding mode data processing. A complete signal model of the azimuth convoluted sliding mode data with the dechirp-on-receive is newly derived. Based on the signal model, the frequency scaling factor and azimuth-matched filter have been modified to accurately perform RCMC and azimuth compression. Point target simulations demonstrated two advantages of the proposed algorithm over the conventional sub-aperture approach; One is accurate and consistent azimuth compression performance regardless of range displacements, and the other is wide observable azimuth extent. The practicality of the proposed method is further verified through actual SAR raw data experiments. In addition, it is analyzed that the proposed algorithm is specialized in processing dechirped sliding mode data through a characteristic comparison with various traditional sliding spotlight processing methods.}, keywords = {International}, pubstate = {published}, tppubtype = {article} } This paper proposes a full-aperture method for processing sliding spotlight synthetic aperture radar (SAR) data with dechirp-on-receive. The frequency scaling algorithm (FSA) efficiently processes the dechirped signals because the range cell migration correction (RCMC) process involves removing the residual video phase. However, the conventional FSA combined with the sub-aperture method is unsuitable for processing sliding mode data because the azimuth extent of the SAR image is limited by the system pulse repetition frequency. In addition, the azimuth compression performance deteriorates as the range displacement increases from the center of the SAR image. To address these problems, we developed a modified full-aperture FSA for sliding mode data processing. A complete signal model of the azimuth convoluted sliding mode data with the dechirp-on-receive is newly derived. Based on the signal model, the frequency scaling factor and azimuth-matched filter have been modified to accurately perform RCMC and azimuth compression. Point target simulations demonstrated two advantages of the proposed algorithm over the conventional sub-aperture approach; One is accurate and consistent azimuth compression performance regardless of range displacements, and the other is wide observable azimuth extent. The practicality of the proposed method is further verified through actual SAR raw data experiments. In addition, it is analyzed that the proposed algorithm is specialized in processing dechirped sliding mode data through a characteristic comparison with various traditional sliding spotlight processing methods. |
| 416. | Young-Geun Kang; Seungwoon Park; Eunsung Kim; Kyeongrok Kim; Seong-Ook Park Multichannel Along-Track Interferometric SAR System Implementation Using FMCW Radar Journal Article IEEE Geoscience and Remote Sensing Letters, 20 , pp. 4009405, 2023. Abstract | Links | BibTeX | 태그: International @article{Kang2023, title = {Multichannel Along-Track Interferometric SAR System Implementation Using FMCW Radar}, author = {Young-Geun Kang and Seungwoon Park and Eunsung Kim and Kyeongrok Kim and Seong-Ook Park}, url = {http://ma.kaist.ac.kr/wp-content/uploads/2023/09/Multichannel-Along-Track-Interferometric-SAR-System-Implementation-Using-FMCW-Radar.pdf}, doi = {10.1109/LGRS.2023.3307187}, year = {2023}, date = {2023-08-21}, journal = {IEEE Geoscience and Remote Sensing Letters}, volume = {20}, pages = {4009405}, abstract = {Along-track synthetic aperture radar interferometry (ATI) systems are used to detect a moving target and to estimate its radial velocity. A dual-channel (single-baseline) ATI system estimates the velocity ambiguously because there are many candidate velocities corresponding to the interferometric phase. To resolve the ambiguity of the estimates, a multichannel (multibaseline) ATI system is required. This letter proposes an efficient implementation technique of a multichannel ATI system by using a frequency-modulated continuous wave (FMCW) radar and an antenna arrangement method considering the inherent bi-static characteristic of FMCW radars. Also, a simple and robust radial velocity estimation algorithm suitable for the proposed system model is presented. The validity of the algorithm is confirmed with simulated ATI results.}, keywords = {International}, pubstate = {published}, tppubtype = {article} } Along-track synthetic aperture radar interferometry (ATI) systems are used to detect a moving target and to estimate its radial velocity. A dual-channel (single-baseline) ATI system estimates the velocity ambiguously because there are many candidate velocities corresponding to the interferometric phase. To resolve the ambiguity of the estimates, a multichannel (multibaseline) ATI system is required. This letter proposes an efficient implementation technique of a multichannel ATI system by using a frequency-modulated continuous wave (FMCW) radar and an antenna arrangement method considering the inherent bi-static characteristic of FMCW radars. Also, a simple and robust radial velocity estimation algorithm suitable for the proposed system model is presented. The validity of the algorithm is confirmed with simulated ATI results. |
| 415. | Ye-Eun Chi; Jinki Park; Seong-Ook Park Hybrid Multibeamforming Receiver with High-Precision Beam Steering for Low Earth Orbit Satellite Communication Journal Article IEEE Transactions on Antennas and Propagation, 71 (7), pp. 5695-5707, 2023. Abstract | Links | BibTeX | 태그: International @article{Chi2023, title = {Hybrid Multibeamforming Receiver with High-Precision Beam Steering for Low Earth Orbit Satellite Communication}, author = {Ye-Eun Chi and Jinki Park and Seong-Ook Park}, url = {http://ma.kaist.ac.kr/wp-content/uploads/2023/09/Hybrid-Multibeamforming-Receiver-With-High-Precision-Beam-Steering-for-Low-Earth-Orbit-Satellite-Communication.pdf}, doi = {10.1109/TAP.2023.3277195}, year = {2023}, date = {2023-05-22}, journal = {IEEE Transactions on Antennas and Propagation}, volume = {71}, number = {7}, pages = {5695-5707}, abstract = {A hybrid multibeamforming receiver for low Earth orbit (LEO) satellite communication in the Ku-band is designed and tested. The proposed receiver is implemented with eight channels to enable the multibeam control. The proposed receiver, including both analog and digital beamforming structures, is capable of multibeam reception using both analog and digital beamforming techniques simultaneously or selectively. Analog beamforming is implemented by employing a local oscillator phase shifter using direct digital synthesis and phase-locked loop (PLL) structures. In digital beamforming, a software-defined radio can control the phase of the signal in the digital baseband. The multibeam received using the proposed hybrid multibeamforming receiver was measured at 11.7 and 12.7 GHz in an anechoic chamber. The phase-control resolutions of analog and digital beamforming were 0.022° and 0.72°, respectively. Analog beam-switching speed is slower than digital beamforming because it depends on the settling time of the PLL circuit, but it has a high phase-control resolution. Therefore, by using analog and digital beamforming when precise beam tilting and fast beam switching are required, respectively, the proposed hybrid multibeamforming is shown to be suitable in accordance with the communication situation.}, keywords = {International}, pubstate = {published}, tppubtype = {article} } A hybrid multibeamforming receiver for low Earth orbit (LEO) satellite communication in the Ku-band is designed and tested. The proposed receiver is implemented with eight channels to enable the multibeam control. The proposed receiver, including both analog and digital beamforming structures, is capable of multibeam reception using both analog and digital beamforming techniques simultaneously or selectively. Analog beamforming is implemented by employing a local oscillator phase shifter using direct digital synthesis and phase-locked loop (PLL) structures. In digital beamforming, a software-defined radio can control the phase of the signal in the digital baseband. The multibeam received using the proposed hybrid multibeamforming receiver was measured at 11.7 and 12.7 GHz in an anechoic chamber. The phase-control resolutions of analog and digital beamforming were 0.022° and 0.72°, respectively. Analog beam-switching speed is slower than digital beamforming because it depends on the settling time of the PLL circuit, but it has a high phase-control resolution. Therefore, by using analog and digital beamforming when precise beam tilting and fast beam switching are required, respectively, the proposed hybrid multibeamforming is shown to be suitable in accordance with the communication situation. |
| 414. | Jun Sung Park; Chul Ki Kim; Seong Ook Park A Stretched Deramping Radar Technique for High-Resolution SAR Processing in Ka-Band Using the Extended Integration Time Journal Article IEEE Transactions on Instrumentation and Measurement, 72 , 2023. Abstract | Links | BibTeX | 태그: International @article{Park2023, title = {A Stretched Deramping Radar Technique for High-Resolution SAR Processing in Ka-Band Using the Extended Integration Time}, author = {Jun Sung Park and Chul Ki Kim and Seong Ook Park}, url = {http://ma.kaist.ac.kr/wp-content/uploads/2023/09/A-Stretched-Deramping-Radar-Technique-for-High-Resolution-SAR-Processing-in-Ka-Band-Using-the-Extended-Integration-Time.pdf}, doi = {10.1109/TIM.2023.3264048}, year = {2023}, date = {2023-04-03}, journal = {IEEE Transactions on Instrumentation and Measurement}, volume = {72}, abstract = {To increase the image quality of synthetic aperture radar (SAR) is one of the hot issues for high-performance detection/reconnaissance. With this interest in the SAR technique, it generates various techniques according to the purposed platforms (Auto-SAR, ViSAR, InSAR, and PolSAR). In this article, we introduce high-efficiency and useful techniques, which can be applied to various SAR applications for generating high-quality images in the Ka -band. We proposed the stretched deramping hardware system applicable in the Ka -band, and design the Range-Doppler algorithm which well matches the proposed radar system with the modified signal parameters. Thus, we can extend the integration time of the convolution process in slow time and it leads to the improvement of the SAR image quality. To verify the performance of our proposed technique, we process the practical experiments in conventional outdoor fields. Furthermore, the proposed method is operated on the range Doppler algorithm (RDA), which is mostly used for standard SAR.}, keywords = {International}, pubstate = {published}, tppubtype = {article} } To increase the image quality of synthetic aperture radar (SAR) is one of the hot issues for high-performance detection/reconnaissance. With this interest in the SAR technique, it generates various techniques according to the purposed platforms (Auto-SAR, ViSAR, InSAR, and PolSAR). In this article, we introduce high-efficiency and useful techniques, which can be applied to various SAR applications for generating high-quality images in the Ka -band. We proposed the stretched deramping hardware system applicable in the Ka -band, and design the Range-Doppler algorithm which well matches the proposed radar system with the modified signal parameters. Thus, we can extend the integration time of the convolution process in slow time and it leads to the improvement of the SAR image quality. To verify the performance of our proposed technique, we process the practical experiments in conventional outdoor fields. Furthermore, the proposed method is operated on the range Doppler algorithm (RDA), which is mostly used for standard SAR. |
| 413. | Myoung-Ho Chae; Seong-Ook Park; Seung-Ho Choi; Chae-Taek Choi Commercial Fixed-Wing Drone Redirection System using GNSS Deception Journal Article IEEE Transactions on Aerospace and Electronic Systems, Early Access , 2023. Links | BibTeX | 태그: International @article{Chae2023, title = {Commercial Fixed-Wing Drone Redirection System using GNSS Deception}, author = {Myoung-Ho Chae and Seong-Ook Park and Seung-Ho Choi and Chae-Taek Choi}, editor = {As drones become more common today, the threat of reconnaissance or attack drones to core facilities has increased, and countermeasures against them have become essential. In this study, a drone redirection system was proposed to counter illegal intrusion of commercial fixed-wing drones. The drone redirection system was designed as a closed-loop system that automatically redirects the drone to a target position. The main novelty of this study is a proposal for a system that can automatically redirect a commercial fixed-wing drone, which has not been previously explored. We proposed two strategies for redirecting drones. Additionally, simple drone modeling with a path-following algorithm was used to easily model various drones. The drone model was then tuned using flight test data, and the results were compared. Simulations were performed on the designed drone redirection system model to verify the performance of the two proposed strategies for redirecting drones in conjunction with drone fail-detection and innovation check. The performance of the drone redirection system was assessed through flight tests of Remo-M and simulations of Micropilot's hardware-in-the-loop simulator (HWILS). Through simple drone modeling, drone flight tests, and the test results from HWILS, it was proved that the drone redirection system can be applied to various fixed-wing drones.}, url = {http://ma.kaist.ac.kr/wp-content/uploads/2023/09/Commercial-Fixed-Wing-Drone-Redirection-System-using-GNSS-Deception.pdf}, doi = {10.1109/TAES.2023.3264193}, year = {2023}, date = {2023-04-03}, journal = {IEEE Transactions on Aerospace and Electronic Systems}, volume = {Early Access}, keywords = {International}, pubstate = {published}, tppubtype = {article} } |
2022 |
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| 412. | Laxmikant Minz; Ye-eun Chi; Kyunghoon Kwon; Min-Seon Yun; Young-Chan Moon; Duk-Yong Kim; Seong-Ook Park Utilizing Non-Orthogonal Polarization With Polarization Reuse Technique for 4 × 4 MIMO Capacity Enhancement Journal Article IEEE Access, 10 , pp. 131952-131964, 2022. Abstract | Links | BibTeX | 태그: International @article{Minz2022b, title = {Utilizing Non-Orthogonal Polarization With Polarization Reuse Technique for 4 × 4 MIMO Capacity Enhancement}, author = {Laxmikant Minz and Ye-eun Chi and Kyunghoon Kwon and Min-Seon Yun and Young-Chan Moon and Duk-Yong Kim and Seong-Ook Park}, url = {http://ma.kaist.ac.kr/wp-content/uploads/2023/03/Utilizing_Non-Orthogonal_Polarization_With_Polarization_Reuse_Technique_for_4__4_MIMO_Capacity_Enhancement.pdf}, doi = {10.1109/ACCESS.2022.3228043}, year = {2022}, date = {2022-12-09}, journal = {IEEE Access}, volume = {10}, pages = {131952-131964}, abstract = {5G communication promises fast and large data stream which requires higher capacity of a cellular wireless network. A higher capacity could be achieved with wider bandwidth and network densification, but they are expensive approaches. Instead, upgrading the wireless network with higher-order Multiple Input Multiple Output (MIMO) antenna system with polarization diversity can inexpensively escalate the peak data rate for higher capacity. We present a 4×4 MIMO cellular network scheme utilizing polarization reuse and using 4 polarization to reform the cellular network from current state of the art of dual polarization 4×4 MIMO scheme. 4 Polarization (vertical, Horizontal, ±45° slant) is used in 2 orthogonal polarization pair form, with a beam-separation among pair, to intensify polarization diversity and maximize the MIMO network channel capacity. This beam-separated polarization reuse technique minimizes the channel correlation which maximizes the probability of four independent data streams (rank 4). The simulated result of the channel capacity with the proposed scheme achieves a 30% higher capacity compared to the baseline configuration of 3-sector 4×4 MIMO. The field trial of the presented network indicates a higher portion of rank 4, supporting four independent data streams in the rich scattering environment of a cellular network.}, keywords = {International}, pubstate = {published}, tppubtype = {article} } 5G communication promises fast and large data stream which requires higher capacity of a cellular wireless network. A higher capacity could be achieved with wider bandwidth and network densification, but they are expensive approaches. Instead, upgrading the wireless network with higher-order Multiple Input Multiple Output (MIMO) antenna system with polarization diversity can inexpensively escalate the peak data rate for higher capacity. We present a 4×4 MIMO cellular network scheme utilizing polarization reuse and using 4 polarization to reform the cellular network from current state of the art of dual polarization 4×4 MIMO scheme. 4 Polarization (vertical, Horizontal, ±45° slant) is used in 2 orthogonal polarization pair form, with a beam-separation among pair, to intensify polarization diversity and maximize the MIMO network channel capacity. This beam-separated polarization reuse technique minimizes the channel correlation which maximizes the probability of four independent data streams (rank 4). The simulated result of the channel capacity with the proposed scheme achieves a 30% higher capacity compared to the baseline configuration of 3-sector 4×4 MIMO. The field trial of the presented network indicates a higher portion of rank 4, supporting four independent data streams in the rich scattering environment of a cellular network. |
| 411. | Rao Shahid Aziz; Amit Kumar Singh; Jun-Sung Park; Seong-Ook Park; Slawomir Koziel Compact electromagnetic lens antennas using cascaded metasurfaces for gain enhancement and beam steering applications Journal Article Internatioinal Journal of RF and Microwave Computer-Aided Engieering, 32 (11), pp. e23327, 2022. Abstract | Links | BibTeX | 태그: International @article{Aziz2022, title = {Compact electromagnetic lens antennas using cascaded metasurfaces for gain enhancement and beam steering applications}, author = {Rao Shahid Aziz and Amit Kumar Singh and Jun-Sung Park and Seong-Ook Park and Slawomir Koziel}, url = {http://ma.kaist.ac.kr/wp-content/uploads/2023/03/Int-J-RF-Mic-Comp-Aid-Eng-2022-Aziz-Compact-electromagnetic-lens-antennas-using-cascaded-metasurfaces-for-gain.pdf}, doi = {10.1002/mmce.23327}, year = {2022}, date = {2022-07-27}, journal = {Internatioinal Journal of RF and Microwave Computer-Aided Engieering}, volume = {32}, number = {11}, pages = {e23327}, abstract = {Electromagnetic (EM) lens antenna designs using cascaded metasurfaces for gain enhancement and beam steering applications are proposed. Two different lens aperture designs are proposed and populated with aperiodic unit cells of size 0.2λo × 0.2λo. In lens Design 1, the unit cells of different phases are distributed in concentric circular zones, whereas in lens Design 2, the unit cells of different phases are distributed in vertical linear zones on the aperture of the EM lens. Both lenses are composed of two cascaded metasurfaces with an air gap of 0.047λo (where λo = 51.7 mm at 5.8 GHz). For gain enhancement, the metasurfaces are positioned at an optimum focal distance, f = 0.61λo above source patch antenna (f/D = 0.3). Beam steering is accomplished by phase transformation of the source antenna, which can be realized by mechanically sliding the passive metasurfaces in one direction (i.e., ±x-direction) above the source antenna. The prototype of the two proposed lenses are fabricated and tested. The measured peak boresight gain obtained from Design 1 and 2 are 14.98 and 15.12 dBi, respectively. The experimental results show −25° to +25° and −27° to +27° beam steering range for Design 1 and 2, respectively, with a little gain degradation at other angles.}, keywords = {International}, pubstate = {published}, tppubtype = {article} } Electromagnetic (EM) lens antenna designs using cascaded metasurfaces for gain enhancement and beam steering applications are proposed. Two different lens aperture designs are proposed and populated with aperiodic unit cells of size 0.2λo × 0.2λo. In lens Design 1, the unit cells of different phases are distributed in concentric circular zones, whereas in lens Design 2, the unit cells of different phases are distributed in vertical linear zones on the aperture of the EM lens. Both lenses are composed of two cascaded metasurfaces with an air gap of 0.047λo (where λo = 51.7 mm at 5.8 GHz). For gain enhancement, the metasurfaces are positioned at an optimum focal distance, f = 0.61λo above source patch antenna (f/D = 0.3). Beam steering is accomplished by phase transformation of the source antenna, which can be realized by mechanically sliding the passive metasurfaces in one direction (i.e., ±x-direction) above the source antenna. The prototype of the two proposed lenses are fabricated and tested. The measured peak boresight gain obtained from Design 1 and 2 are 14.98 and 15.12 dBi, respectively. The experimental results show −25° to +25° and −27° to +27° beam steering range for Design 1 and 2, respectively, with a little gain degradation at other angles. |
| 410. | Young-Geun Kang; Goo-Hwan Shin; Seong-Ook Park Validation of the feasibility of implementing spotlight SAR mode in the NEXTSat-2 and Ka-Band Satellite Conference The 14th Global Symposium on Millimeter-Waves & Terahertz(GSMM 2022), Korea, 2022. BibTeX | 태그: International @conference{Kang2022b, title = {Validation of the feasibility of implementing spotlight SAR mode in the NEXTSat-2 and Ka-Band Satellite}, author = {Young-Geun Kang and Goo-Hwan Shin and Seong-Ook Park}, year = {2022}, date = {2022-05-18}, booktitle = {The 14th Global Symposium on Millimeter-Waves & Terahertz(GSMM 2022)}, address = {Korea}, keywords = {International}, pubstate = {published}, tppubtype = {conference} } |
| 409. | Jun-Sung Park; Chul-Ki Kim; Seong-Ook Park A Stretched De-Ramping Radar System for High-Quality SAR Image in Ka-Band Conference The 14th Global Symposium on Millimeter-Waves & Terahertz(GSMM 2022), Korea, 2022. BibTeX | 태그: International @conference{Park2022, title = {A Stretched De-Ramping Radar System for High-Quality SAR Image in Ka-Band}, author = {Jun-Sung Park and Chul-Ki Kim and Seong-Ook Park}, year = {2022}, date = {2022-05-18}, booktitle = {The 14th Global Symposium on Millimeter-Waves & Terahertz(GSMM 2022)}, address = {Korea}, keywords = {International}, pubstate = {published}, tppubtype = {conference} } |
| 408. | Ye-Eun Chi; Jinki Park; Seong-Ook Park A Novel Phase Detection System Applicable to Calibration Techniques Conference The 14th Global Symposium on Millimeter-Waves & Terahertz(GSMM 2022), Korea, 2022. BibTeX | 태그: International @conference{Chi2022, title = {A Novel Phase Detection System Applicable to Calibration Techniques}, author = {Ye-Eun Chi and Jinki Park and Seong-Ook Park}, year = {2022}, date = {2022-05-18}, booktitle = {The 14th Global Symposium on Millimeter-Waves & Terahertz(GSMM 2022)}, address = {Korea}, keywords = {International}, pubstate = {published}, tppubtype = {conference} } |
| 407. | Young-Geun Kang; Dae-Hwan Jung; Goo-Hwan Shin; Chul-Ki Kim; Seong-Ook Park A Study on the Feasibility of Stop-and-Go Approximation in FMCW SAR Journal Article Journal of Electromagnetic Engineering and Science, 22 (3), pp. 210-217, 2022. Links | BibTeX | 태그: International @article{Kang2022d, title = {A Study on the Feasibility of Stop-and-Go Approximation in FMCW SAR}, author = {Young-Geun Kang and Dae-Hwan Jung and Goo-Hwan Shin and Chul-Ki Kim and Seong-Ook Park}, url = {http://ma.kaist.ac.kr/wp-content/uploads/2022/06/jees-2022-3-r-79.pdf}, doi = {10.26866/jees.2022.3.r.79}, year = {2022}, date = {2022-04-20}, journal = {Journal of Electromagnetic Engineering and Science}, volume = {22}, number = {3}, pages = {210-217}, keywords = {International}, pubstate = {published}, tppubtype = {article} } |
| 406. | Young-Geun Kang; Chul-Ki Kim; Seong-Ook Park Ocean Image Formation Algorithm Using Altimeter Data for Next Generation Satellite SAR Journal Article Journal of Electromagnetic Engineering and Science, 22 (2), pp. 85-94, 2022. Abstract | Links | BibTeX | 태그: International @article{Kang2022, title = {Ocean Image Formation Algorithm Using Altimeter Data for Next Generation Satellite SAR}, author = {Young-Geun Kang and Chul-Ki Kim and Seong-Ook Park}, url = {http://ma.kaist.ac.kr/wp-content/uploads/2022/05/jees-2022-2-r-64.pdf}, doi = {10.26866/jees.2022.2.r.64}, year = {2022}, date = {2022-03-31}, journal = {Journal of Electromagnetic Engineering and Science}, volume = {22}, number = {2}, pages = {85-94}, abstract = {Synthetic aperture radar (SAR) obtains two-dimensional images of the Earth’s surface. Spatial resolution is one of the most important factors in evaluating SAR performance. Therefore, high operating frequencies are preferred for obtaining high resolution images. In fact, Ku-band and Ka-band are used in the automobile SAR (Auto-SAR) and the aircraft SAR (Airborne-SAR). However, the operating frequencies of the satellite SAR (Spaceborne-SAR) are limited to the X-band because of the wide Doppler frequency band caused by the satellite’s high velocity. To overcome this frequency limitation in satellite SAR, we propose a low-complexity SAR algorithm that forms images of the ocean using satellite altimeter data with an operating frequency of the Ku-band (13.575 GHz). The algorithm requires the burst mode pulse transmission technique frequently used in SAR altimeters. To validate the proposed algorithm as being suitable for ocean image formation, point target simulation and analysis are performed, and some quantitative results are provided.}, keywords = {International}, pubstate = {published}, tppubtype = {article} } Synthetic aperture radar (SAR) obtains two-dimensional images of the Earth’s surface. Spatial resolution is one of the most important factors in evaluating SAR performance. Therefore, high operating frequencies are preferred for obtaining high resolution images. In fact, Ku-band and Ka-band are used in the automobile SAR (Auto-SAR) and the aircraft SAR (Airborne-SAR). However, the operating frequencies of the satellite SAR (Spaceborne-SAR) are limited to the X-band because of the wide Doppler frequency band caused by the satellite’s high velocity. To overcome this frequency limitation in satellite SAR, we propose a low-complexity SAR algorithm that forms images of the ocean using satellite altimeter data with an operating frequency of the Ku-band (13.575 GHz). The algorithm requires the burst mode pulse transmission technique frequently used in SAR altimeters. To validate the proposed algorithm as being suitable for ocean image formation, point target simulation and analysis are performed, and some quantitative results are provided. |
| 405. | Chul-Ki Kim; Mi-Young Park; Goo-Hwan Shin; Seong-Ook Park An Improved Technique for Single-Channel Video-SAR Based on Fractional Fourier Transform Journal Article IEEE Transactions on Aerospace and Electronic Systems, 2022. Abstract | Links | BibTeX | 태그: International @article{Kim2022, title = {An Improved Technique for Single-Channel Video-SAR Based on Fractional Fourier Transform}, author = {Chul-Ki Kim and Mi-Young Park and Goo-Hwan Shin and Seong-Ook Park}, url = {http://ma.kaist.ac.kr/wp-content/uploads/2023/10/An-Improved-Technique-for-Single-Channel-Video-SAR-Based-on-Fractional-Fourier-Transform.pdf}, doi = {10.1109/TAES.2022.3157657}, year = {2022}, date = {2022-03-08}, journal = {IEEE Transactions on Aerospace and Electronic Systems}, abstract = {In the field of Synthetic Aperture Radar (SAR), a lot of researchers have tried to study an improved application beyond the conventional 2D image. Video-SAR (ViSAR) is one of the hot-issue in the SAR application. The main purpose of ViSAR is to monitor various targets in the area of interest in time order. It can offer video images to detect not only the fixed target but also the moving target. For the signal processing of ViSAR, this paper introduces the improved performance by the Doppler shifting technique with Fractional Fourier Transform (FrFT). And also, it shows that the proposed method can separate the unexpected signal of the moving target within each frame of single-channel ViSAR. Furthermore, the overall algorithm can increase efficiency and reliability in ViSAR processing. To verify the improvement of our method, we carry out the practical experiments by an X-band chirp pulse SAR system, mounted on an airplane.}, keywords = {International}, pubstate = {published}, tppubtype = {article} } In the field of Synthetic Aperture Radar (SAR), a lot of researchers have tried to study an improved application beyond the conventional 2D image. Video-SAR (ViSAR) is one of the hot-issue in the SAR application. The main purpose of ViSAR is to monitor various targets in the area of interest in time order. It can offer video images to detect not only the fixed target but also the moving target. For the signal processing of ViSAR, this paper introduces the improved performance by the Doppler shifting technique with Fractional Fourier Transform (FrFT). And also, it shows that the proposed method can separate the unexpected signal of the moving target within each frame of single-channel ViSAR. Furthermore, the overall algorithm can increase efficiency and reliability in ViSAR processing. To verify the improvement of our method, we carry out the practical experiments by an X-band chirp pulse SAR system, mounted on an airplane. |
| 404. | Jun-Sung Park; Seong-Ook Park 드론 탐지 레이다 현황 및 기술 소개 Conference 2022년 한국전자파학회 동계종합학술대회, 2022. @conference{Park2022b, title = {드론 탐지 레이다 현황 및 기술 소개}, author = {Jun-Sung Park and Seong-Ook Park}, year = {2022}, date = {2022-02-09}, booktitle = {2022년 한국전자파학회 동계종합학술대회}, keywords = {Domestic}, pubstate = {published}, tppubtype = {conference} } |
| 403. | Young-Geun Kang; Mi-Young Park; Seong-Ook Park 차세대 소형위성 2호에서의 Spotlight SAR mode 구현 가능성 검증 Conference 2022년 한국전자파학회 동계종합학술대회, 2022. @conference{Kang2022c, title = {차세대 소형위성 2호에서의 Spotlight SAR mode 구현 가능성 검증}, author = {Young-Geun Kang and Mi-Young Park and Seong-Ook Park}, year = {2022}, date = {2022-02-09}, booktitle = {2022년 한국전자파학회 동계종합학술대회}, journal = {2022년 한국전자파학회 동계종합학술대회}, keywords = {Domestic}, pubstate = {published}, tppubtype = {conference} } |
| 402. | Jun-Sung Park; Seong-Ook Park Ka-band SAR 영상 획득 알고리즘 Conference 2022년 한국전자파학회 동계종합학술대회, 2022. @conference{Park2022c, title = {Ka-band SAR 영상 획득 알고리즘}, author = {Jun-Sung Park and Seong-Ook Park}, year = {2022}, date = {2022-02-09}, booktitle = {2022년 한국전자파학회 동계종합학술대회}, keywords = {Domestic}, pubstate = {published}, tppubtype = {conference} } |
| 401. | Ji-Sang Yoon; Mi-Young Park; Seong-Ook Park 소형위성 SAR 신호처리를 위한 데이터기반 도플러 파라미터 추출 알고리즘 구현 Conference 2022년 한국전자파학회 동계종합학술대회, 2022. @conference{Yoon2022, title = {소형위성 SAR 신호처리를 위한 데이터기반 도플러 파라미터 추출 알고리즘 구현}, author = {Ji-Sang Yoon and Mi-Young Park and Seong-Ook Park}, year = {2022}, date = {2022-02-09}, booktitle = {2022년 한국전자파학회 동계종합학술대회}, keywords = {Domestic}, pubstate = {published}, tppubtype = {conference} } |
| 400. | Seungwoon Park; Seong-Ook Park Ku 밴드 FMCW 트라리앵귤러 첩을 활용한 SAR 이미지 처리 Conference 2022년 한국전자파학회 동계종합학술대회, 2022. @conference{Park2022d, title = {Ku 밴드 FMCW 트라리앵귤러 첩을 활용한 SAR 이미지 처리}, author = {Seungwoon Park and Seong-Ook Park}, year = {2022}, date = {2022-02-09}, booktitle = {2022년 한국전자파학회 동계종합학술대회}, keywords = {Domestic}, pubstate = {published}, tppubtype = {conference} } |
| 399. | Han-Sol Kim; Seong-Ook Park 누설신호 제거 기법이 적용된 잡음 영향 및 Clutter 영향을 최소화하는 FMCW Sensor Conference 2022년 한국전자파학회 동계종합학술대회, 2022. @conference{Kim2022b, title = {누설신호 제거 기법이 적용된 잡음 영향 및 Clutter 영향을 최소화하는 FMCW Sensor}, author = {Han-Sol Kim and Seong-Ook Park}, year = {2022}, date = {2022-02-09}, booktitle = {2022년 한국전자파학회 동계종합학술대회}, keywords = {Domestic}, pubstate = {published}, tppubtype = {conference} } |
| 398. | Kyung-Bin Bae; Dong-Ha Yang; Seong-Ook Park Chirp Pulse Radar에 적용 가능한 특이 값 분해를 이용한 Clutter 제거 기법 및 이를 이용한 소형 드론 탐지 Conference 2022년 한국전자파학회 동계종합학술대회, 2022. @conference{Bae2022b, title = {Chirp Pulse Radar에 적용 가능한 특이 값 분해를 이용한 Clutter 제거 기법 및 이를 이용한 소형 드론 탐지}, author = {Kyung-Bin Bae and Dong-Ha Yang and Seong-Ook Park}, year = {2022}, date = {2022-02-09}, booktitle = {2022년 한국전자파학회 동계종합학술대회}, keywords = {Domestic}, pubstate = {published}, tppubtype = {conference} } |
| 397. | Ye-eun Chi; Jinki Park; Seong-Ook Park 위상 검출 시스템을 이용한 밀리미터파 대역 빔포밍 송신기 Conference 2022년 한국전자파학회 동계종합학술대회, 2022. @conference{Chi2022b, title = {위상 검출 시스템을 이용한 밀리미터파 대역 빔포밍 송신기}, author = {Ye-eun Chi and Jinki Park and Seong-Ook Park}, year = {2022}, date = {2022-02-09}, booktitle = {2022년 한국전자파학회 동계종합학술대회}, keywords = {Domestic}, pubstate = {published}, tppubtype = {conference} } |
| 396. | Dong-Chan Kim; Seong-Ook Park DDS를 이용한 고해상도 빔포밍 시스템 Conference 2022년 한국전자파학회 동계종합학술대회, 2022. @conference{Kim2022c, title = {DDS를 이용한 고해상도 빔포밍 시스템}, author = {Dong-Chan Kim and Seong-Ook Park}, year = {2022}, date = {2022-02-09}, booktitle = {2022년 한국전자파학회 동계종합학술대회}, keywords = {Domestic}, pubstate = {published}, tppubtype = {conference} } |
| 395. | Dong-Ha Yang; Seong-Ook Park Sinusoidally modulated leaky wave antenna on Ka-band Conference 2022년 한국전자파학회 동계종합학술대회, 2022. @conference{Yang2022, title = {Sinusoidally modulated leaky wave antenna on Ka-band}, author = {Dong-Ha Yang and Seong-Ook Park}, year = {2022}, date = {2022-02-09}, booktitle = {2022년 한국전자파학회 동계종합학술대회}, keywords = {Domestic}, pubstate = {published}, tppubtype = {conference} } |
| 394. | Young-In Yoo; Seong-Ook Park 네마틱 액정 기반 밀리미터파 가변형 빔포밍 Reflectarray 설계 Conference 2022년 한국전자파학회 동계종합학술대회, 2022. @conference{Yoo2022, title = {네마틱 액정 기반 밀리미터파 가변형 빔포밍 Reflectarray 설계}, author = {Young-In Yoo and Seong-Ook Park}, year = {2022}, date = {2022-02-09}, booktitle = {2022년 한국전자파학회 동계종합학술대회}, keywords = {Domestic}, pubstate = {published}, tppubtype = {conference} } |
| 393. | Jiyeol Meang; Laxmikant Minz; Seong-Ook Park K-band Wideband Circular Waveguide to Microstrip Transition for Detecting Targets and Anti-jamming Conference 2022년 한국전자파학회 동계종합학술대회, 2022. @conference{Meang2022, title = {K-band Wideband Circular Waveguide to Microstrip Transition for Detecting Targets and Anti-jamming}, author = {Jiyeol Meang and Laxmikant Minz and Seong-Ook Park}, year = {2022}, date = {2022-02-09}, booktitle = {2022년 한국전자파학회 동계종합학술대회}, keywords = {Domestic}, pubstate = {published}, tppubtype = {conference} } |
| 392. | Jinki Park; Ye-eun Chi; Seong-Ook Park 밀리미터파 대역 액정 기반 빔 조향 SIW 누설파 안테나 설계 Conference 2022년 한국전자파학회 동계종합학술대회, 2022. @conference{Park2022e, title = {밀리미터파 대역 액정 기반 빔 조향 SIW 누설파 안테나 설계}, author = {Jinki Park and Ye-eun Chi and Seong-Ook Park}, year = {2022}, date = {2022-02-09}, booktitle = {2022년 한국전자파학회 동계종합학술대회}, keywords = {Domestic}, pubstate = {published}, tppubtype = {conference} } |
| 391. | Yoo-Ho Jang; Seong-Ook Park Leakywave antenna capable of omnidirectional beamforming Conference 2022년 한국전자파학회 동계종합학술대회, 2022. @conference{Jang2022, title = {Leakywave antenna capable of omnidirectional beamforming}, author = {Yoo-Ho Jang and Seong-Ook Park}, year = {2022}, date = {2022-02-09}, booktitle = {2022년 한국전자파학회 동계종합학술대회}, keywords = {Domestic}, pubstate = {published}, tppubtype = {conference} } |
| 390. | Ashish Kumar Singh; Jun-Sung Park; Seong-Ook Park Generation of Nonlinear Frequency Modulated Chirp Signal using Window Function Conference 2022년 한국전자파학회 동계종합학술대회, 2022. @conference{Singh2022, title = {Generation of Nonlinear Frequency Modulated Chirp Signal using Window Function}, author = {Ashish Kumar Singh and Jun-Sung Park and Seong-Ook Park}, year = {2022}, date = {2022-02-09}, booktitle = {2022년 한국전자파학회 동계종합학술대회}, keywords = {Domestic}, pubstate = {published}, tppubtype = {conference} } |
| 389. | Laxmikant Minz; Ashish Kumar Singh; Seong-Ook Park Side lobe Reduction with Non-uniform Antenna Array using Genetic Algorith Conference 2022년 한국전자파학회 동계종합학술대회, 2022. @conference{Minz2022, title = {Side lobe Reduction with Non-uniform Antenna Array using Genetic Algorith}, author = {Laxmikant Minz and Ashish Kumar Singh and Seong-Ook Park}, year = {2022}, date = {2022-02-09}, booktitle = {2022년 한국전자파학회 동계종합학술대회}, keywords = {Domestic}, pubstate = {published}, tppubtype = {conference} } |
2021 |
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| 388. | Kyei Anim; Patrick Danuor; Seong-Ook Park; Young-Bae Jung High-Efficiency Broadband Planar Array Antenna with Suspended Microstrip Slab for X-Band SAR Onboard Small Satellites Journal Article Sensors, 22 (1), pp. 252, 2021. Abstract | Links | BibTeX | 태그: International @article{Anim2021, title = {High-Efficiency Broadband Planar Array Antenna with Suspended Microstrip Slab for X-Band SAR Onboard Small Satellites}, author = {Kyei Anim and Patrick Danuor and Seong-Ook Park and Young-Bae Jung}, url = {http://ma.kaist.ac.kr/wp-content/uploads/2022/01/High-Efficiency-Broadband-Planar-Array-Antenna-with-Suspended-Microstrip-Slab-for-X-Band-SAR-Onboard-Small-Satellites.pdf}, doi = {10.3390/s22010252}, year = {2021}, date = {2021-12-30}, journal = {Sensors}, volume = {22}, number = {1}, pages = {252}, abstract = {In this paper, a high efficiency broadband planar array antenna is developed at X-band for synthetic aperture radar (SAR) on small satellites. The antenna is based on a multi-layer element structure consisting of two dielectric substrates made of Taconic TLY-5 and three copper layers (i.e., the parasitic patch (top layer), the active patch (middle layer), and the ground plane (bottom layer)). The parasitic patch resides on the bottom surface of the upper TLY-5 substrate while the active patch is printed on the top surface of the lower substrate. A Rohacell foam material is sandwiched between the top layer and the middle layer to separate the two dielectric substrates in order to achieve high directivity, wideband, and to keep the antenna weight to a minimum as required by the SAR satellite application. To satisfy the required size of the antenna panel for the small SAR satellite, an asymmetric corporate feeding network (CFN) is designed to feed a 12 × 16 planar array antenna. However, it was determined that the first corporate feed junction at the center of the CFN, where higher amplitudes of the input signal are located, contributes significantly to the leaky wave emission, which degrades the radiation efficiency and increases the sidelobe level. Thus, a suspended microstrip slab, which is simply a wide and long microstrip line, is designed and positioned on the top layer directly above that feed junction to prevent the leaky waves from radiating. The experimental results of the antenna show good agreement with the simulated ones, achieving an impedance bandwidth of 12.4% from 9.01 to 10.20 GHz and a high gain above 28 dBi. The antenna efficiency estimated from the gain and directivity eclipses 51.34%.}, keywords = {International}, pubstate = {published}, tppubtype = {article} } In this paper, a high efficiency broadband planar array antenna is developed at X-band for synthetic aperture radar (SAR) on small satellites. The antenna is based on a multi-layer element structure consisting of two dielectric substrates made of Taconic TLY-5 and three copper layers (i.e., the parasitic patch (top layer), the active patch (middle layer), and the ground plane (bottom layer)). The parasitic patch resides on the bottom surface of the upper TLY-5 substrate while the active patch is printed on the top surface of the lower substrate. A Rohacell foam material is sandwiched between the top layer and the middle layer to separate the two dielectric substrates in order to achieve high directivity, wideband, and to keep the antenna weight to a minimum as required by the SAR satellite application. To satisfy the required size of the antenna panel for the small SAR satellite, an asymmetric corporate feeding network (CFN) is designed to feed a 12 × 16 planar array antenna. However, it was determined that the first corporate feed junction at the center of the CFN, where higher amplitudes of the input signal are located, contributes significantly to the leaky wave emission, which degrades the radiation efficiency and increases the sidelobe level. Thus, a suspended microstrip slab, which is simply a wide and long microstrip line, is designed and positioned on the top layer directly above that feed junction to prevent the leaky waves from radiating. The experimental results of the antenna show good agreement with the simulated ones, achieving an impedance bandwidth of 12.4% from 9.01 to 10.20 GHz and a high gain above 28 dBi. The antenna efficiency estimated from the gain and directivity eclipses 51.34%. |
| 387. | Jinki Park; Ye-eun Chi; Seong-Ook Park 액정 기반 개구결합 마이크로스트립 패치 안테나 Conference 2021 정보통신설비 추계학술대회, 2021. @conference{Park2021f, title = {액정 기반 개구결합 마이크로스트립 패치 안테나}, author = {Jinki Park and Ye-eun Chi and Seong-Ook Park}, year = {2021}, date = {2021-11-25}, booktitle = {2021 정보통신설비 추계학술대회}, keywords = {Domestic}, pubstate = {published}, tppubtype = {conference} } |
| 386. | Dong-Ha Yang; Seong-Ook Park Ka-band 고효율 리플렉트 어레이에 관한 연구 Conference 2021 정보통신설비 추계학술대회, 2021. @conference{Yang2022b, title = {Ka-band 고효율 리플렉트 어레이에 관한 연구}, author = {Dong-Ha Yang and Seong-Ook Park}, year = {2021}, date = {2021-11-25}, booktitle = {2021 정보통신설비 추계학술대회}, keywords = {Domestic}, pubstate = {published}, tppubtype = {conference} } |
| 385. | Dong-Chan Kim; Seong-Ook Park 5G 이동통신 대역에서 빔포밍을 위한 실시간 보정 기법 Conference 2021년 한국전자파학회 추계학술대회, 2021. @conference{Kim2021f, title = {5G 이동통신 대역에서 빔포밍을 위한 실시간 보정 기법}, author = {Dong-Chan Kim and Seong-Ook Park}, year = {2021}, date = {2021-11-18}, booktitle = {2021년 한국전자파학회 추계학술대회}, keywords = {Domestic}, pubstate = {published}, tppubtype = {conference} } |
| 384. | Kyung-Bin Bae; Seong-Ook Park IF단 스위칭을 이용한 Chirp Pulse 레이다의 탐지 성능 검증 및 이를 이용한 소형 드론 탐지 Conference 2021년 한국전자파학회 추계학술대회, 2021. @conference{Bae2022, title = {IF단 스위칭을 이용한 Chirp Pulse 레이다의 탐지 성능 검증 및 이를 이용한 소형 드론 탐지}, author = {Kyung-Bin Bae and Seong-Ook Park}, year = {2021}, date = {2021-11-18}, booktitle = {2021년 한국전자파학회 추계학술대회}, journal = {2021년 한국전자파학회 추계학술대회}, keywords = {Domestic}, pubstate = {published}, tppubtype = {conference} } |
| 383. | Young-Geun Kang; Dae-Hwan Jung; Seong-Ook Park Validity of Stop-and-Go Approximation in High-Resolution Ku-band FMCW SAR with High-Velocity Platform Conference 2021 7th Asia-Pacific Conference on Synthetic Aperture Radar (APSAR), Indonesia, 2021. BibTeX | 태그: International @conference{Kang2021b, title = {Validity of Stop-and-Go Approximation in High-Resolution Ku-band FMCW SAR with High-Velocity Platform}, author = {Young-Geun Kang and Dae-Hwan Jung and Seong-Ook Park}, year = {2021}, date = {2021-11-01}, booktitle = {2021 7th Asia-Pacific Conference on Synthetic Aperture Radar (APSAR)}, journal = {2021 7th Asia-Pacific Conference on Synthetic Aperture Radar(APSAR)}, address = {Indonesia}, keywords = {International}, pubstate = {published}, tppubtype = {conference} } |
| 382. | Dong-Chan Kim; Ye-eun Chi; Junhyeong Park; Laxmikant Minz; Seong-Ook Park High Resolution Digital Beamforming Receiver Using DDS-PLL Signal Generator for 5G Mobile Communication Journal Article IEEE Transactions on Antennas and Propagation, 2021. Abstract | Links | BibTeX | 태그: International @article{Kim2021e, title = {High Resolution Digital Beamforming Receiver Using DDS-PLL Signal Generator for 5G Mobile Communication}, author = {Dong-Chan Kim and Ye-eun Chi and Junhyeong Park and Laxmikant Minz and Seong-Ook Park}, url = {http://ma.kaist.ac.kr/wp-content/uploads/2022/01/High-Resolution-Digital-Beamforming-Receiver-Using-DDS-PLL-Signal-Generator-for-5G-Mobile-Communication.pdf}, doi = {10.1109/TAP.2021.3111334}, year = {2021}, date = {2021-09-15}, journal = {IEEE Transactions on Antennas and Propagation}, abstract = {This paper presents a signal generator and a Digital Beamforming Receiver (DBR) with high phase control resolution and high beam control resolution, respectively. The signal generator is designed based on a Direct Digital Synthesizer (DDS) and a Phase Lock Loop (PLL). In the DDS-PLL signal generator, the conventional divider in PLL is replaced with a mixer, comb generator, and a doubler to utilize high phase control resolution of DDS (14bit, 0.022°) as it is and to synchronize the DDS-PLL signal generator with the entire system. In the DBR, the output signals of the DDS-PLL signal generators are used as the second Local Oscillator (LO) signal, and the beamforming technique is implemented through the change of the phase of the second LO signals. Also, for sophisticated beamforming, all signal generator components in the DBR are synchronized for generating same and fixed frequency and phase. Finally, the DBR has the same phase control resolution as the DDS, and the phase of each chain of the DBR can be adjusted up to 0.022° (14 bit). The DBR using the DDS-PLL signal generator is designed and fabricated. The DBR consists of a 1X8 array Tapered Slot Antenna (TSA) part, a 1st and 2nd frequency conversion part, a 1X8 data acquisition and combiner part, DDS-PLL signal generator part, and a reference signal generator part. The phase control performance of the DBR was verified by measuring the phase change of the chain in the DBR according to the DDS phase change. Also, to verify the beamforming performance of the DBR with high beam control resolution, the radiation pattern of the DBR when the angle of the main lobe was 0°, 0.2°, 0.4°, 15°, and 30° was measured in the 28GHz band. At the main lobe, the gain error is within 1dB and the beam angle error is within 0.2 degrees. The simulation results are in good agreement with the measured results. A high resolution beamforming performance is achieved in the DBR using the DDS-PLL signal generator.}, keywords = {International}, pubstate = {published}, tppubtype = {article} } This paper presents a signal generator and a Digital Beamforming Receiver (DBR) with high phase control resolution and high beam control resolution, respectively. The signal generator is designed based on a Direct Digital Synthesizer (DDS) and a Phase Lock Loop (PLL). In the DDS-PLL signal generator, the conventional divider in PLL is replaced with a mixer, comb generator, and a doubler to utilize high phase control resolution of DDS (14bit, 0.022°) as it is and to synchronize the DDS-PLL signal generator with the entire system. In the DBR, the output signals of the DDS-PLL signal generators are used as the second Local Oscillator (LO) signal, and the beamforming technique is implemented through the change of the phase of the second LO signals. Also, for sophisticated beamforming, all signal generator components in the DBR are synchronized for generating same and fixed frequency and phase. Finally, the DBR has the same phase control resolution as the DDS, and the phase of each chain of the DBR can be adjusted up to 0.022° (14 bit). The DBR using the DDS-PLL signal generator is designed and fabricated. The DBR consists of a 1X8 array Tapered Slot Antenna (TSA) part, a 1st and 2nd frequency conversion part, a 1X8 data acquisition and combiner part, DDS-PLL signal generator part, and a reference signal generator part. The phase control performance of the DBR was verified by measuring the phase change of the chain in the DBR according to the DDS phase change. Also, to verify the beamforming performance of the DBR with high beam control resolution, the radiation pattern of the DBR when the angle of the main lobe was 0°, 0.2°, 0.4°, 15°, and 30° was measured in the 28GHz band. At the main lobe, the gain error is within 1dB and the beam angle error is within 0.2 degrees. The simulation results are in good agreement with the measured results. A high resolution beamforming performance is achieved in the DBR using the DDS-PLL signal generator. |
| 381. | Young-Geun Kang; Dae-Hwan Jung; Seong-Ook Park FMCW SAR 시스템 사양에 따른 Stop-and-Go 근사의 타당성에 관한 연구 Conference 2021년 한국전자파학회 하계종합학술대회, 2021. @conference{Kang2021, title = {FMCW SAR 시스템 사양에 따른 Stop-and-Go 근사의 타당성에 관한 연구}, author = {Young-Geun Kang and Dae-Hwan Jung and Seong-Ook Park}, year = {2021}, date = {2021-08-18}, booktitle = {2021년 한국전자파학회 하계종합학술대회}, keywords = {Domestic}, pubstate = {published}, tppubtype = {conference} } |
| 380. | Dong-Ha Yang; Seong-Ook Park 고이득 위성용 Ka 밴드 Dual Offset Reflect Array 안테나에 대한 연구 Conference 2021년 한국전자파학회 하계종합학술대회, 2021. @conference{Yang2021, title = {고이득 위성용 Ka 밴드 Dual Offset Reflect Array 안테나에 대한 연구}, author = {Dong-Ha Yang and Seong-Ook Park}, year = {2021}, date = {2021-08-18}, booktitle = {2021년 한국전자파학회 하계종합학술대회}, keywords = {Domestic}, pubstate = {published}, tppubtype = {conference} } |
| 379. | Jun-Sung Park; Seong-Ook Park AI 알고리즘을 이용한 드론 식별 방법에 대한 연구 Conference 2021년 한국전자파학회 하계종합학술대회, 2021. @conference{Park2021c, title = {AI 알고리즘을 이용한 드론 식별 방법에 대한 연구}, author = {Jun-Sung Park and Seong-Ook Park}, year = {2021}, date = {2021-08-18}, booktitle = {2021년 한국전자파학회 하계종합학술대회}, keywords = {Domestic}, pubstate = {published}, tppubtype = {conference} } |
| 378. | Han-Sol Kim; Young-Geun Kang; Seong-Ook Park Clutter 및 잡음 영향을 최소화하는 FMCW Sensor Conference 2021년 한국전자파학회 하계종합학술대회, 2021. @conference{Kim2021c, title = {Clutter 및 잡음 영향을 최소화하는 FMCW Sensor}, author = {Han-Sol Kim and Young-Geun Kang and Seong-Ook Park}, year = {2021}, date = {2021-08-18}, booktitle = {2021년 한국전자파학회 하계종합학술대회}, keywords = {Domestic}, pubstate = {published}, tppubtype = {conference} } |
| 377. | Ye-eun Chi; Seong-Ook Park Calibration 기법에 적용 가능한 새로운 위상 검출 시스템 Conference 2021년 한국전자파학회 하계종합학술대회, 2021. @conference{Chi2021, title = {Calibration 기법에 적용 가능한 새로운 위상 검출 시스템}, author = {Ye-eun Chi and Seong-Ook Park}, year = {2021}, date = {2021-08-18}, booktitle = {2021년 한국전자파학회 하계종합학술대회}, keywords = {Domestic}, pubstate = {published}, tppubtype = {conference} } |
| 376. | Jinki Park; Ye-eun Chi; Seong-Ook Park 밀리미터파 대역 공진 주파수 가변 액정 안테나 설계 Conference 2021년 한국전자파학회 하계종합학술대회, 2021. @conference{Park2021d, title = {밀리미터파 대역 공진 주파수 가변 액정 안테나 설계}, author = {Jinki Park and Ye-eun Chi and Seong-Ook Park}, year = {2021}, date = {2021-08-18}, booktitle = {2021년 한국전자파학회 하계종합학술대회}, keywords = {Domestic}, pubstate = {published}, tppubtype = {conference} } |
| 375. | Yoo-Ho Jang; Seong-Ook Park Cavity-backed Circular Microstrip Patch Antenna on Ka-band Conference 2021년 한국전자파학회 하계종합학술대회, 2021. @conference{Jang2021, title = {Cavity-backed Circular Microstrip Patch Antenna on Ka-band}, author = {Yoo-Ho Jang and Seong-Ook Park}, year = {2021}, date = {2021-08-18}, booktitle = {2021년 한국전자파학회 하계종합학술대회}, keywords = {Domestic}, pubstate = {published}, tppubtype = {conference} } |
| 374. | Dong-Chan Kim; Seong-Ook Park Antenna Pattern Measurements using Beat Frequency in Reverberation Chamber Conference 2021년 한국전자파학회 하계종합학술대회, 2021. @conference{Kim2021d, title = {Antenna Pattern Measurements using Beat Frequency in Reverberation Chamber}, author = {Dong-Chan Kim and Seong-Ook Park}, year = {2021}, date = {2021-08-18}, booktitle = {2021년 한국전자파학회 하계종합학술대회}, keywords = {Domestic}, pubstate = {published}, tppubtype = {conference} } |
| 373. | Kyung-Bin Bae; Jiyeol Meang; Seong-Ook Park 비허가 무인이동체 재밍을 위한 초경량 휴대형 재머 설계 Conference 2021년 한국전자파학회 하계종합학술대회, 2021. @conference{Bae2021b, title = {비허가 무인이동체 재밍을 위한 초경량 휴대형 재머 설계}, author = {Kyung-Bin Bae and Jiyeol Meang and Seong-Ook Park}, year = {2021}, date = {2021-08-18}, booktitle = {2021년 한국전자파학회 하계종합학술대회}, keywords = {Domestic}, pubstate = {published}, tppubtype = {conference} } |
| 372. | Ashish Kumar Singh; Seong-Ook Park Implementation of GPS spoofing system for commercial GPS receiver Conference 2021년 한국전자파학회 하계종합학술대회, 2021. @conference{Singh2021b, title = {Implementation of GPS spoofing system for commercial GPS receiver}, author = {Ashish Kumar Singh and Seong-Ook Park}, year = {2021}, date = {2021-08-18}, booktitle = {2021년 한국전자파학회 하계종합학술대회}, keywords = {Domestic}, pubstate = {published}, tppubtype = {conference} } |
| 371. | Jiyeol Meang; Laxmikant Minz; Seong-Ook Park 24 GHz Conformal Antenna with Broad Beamwidth and Wideband for Detecting Target Conference 2021년 한국전자파학회 하계종합학술대회, 2021. @conference{Meang2021, title = {24 GHz Conformal Antenna with Broad Beamwidth and Wideband for Detecting Target}, author = {Jiyeol Meang and Laxmikant Minz and Seong-Ook Park}, year = {2021}, date = {2021-08-18}, booktitle = {2021년 한국전자파학회 하계종합학술대회}, keywords = {Domestic}, pubstate = {published}, tppubtype = {conference} } |
| 370. | Chul-Ki Kim; Jun-Sung Park; Seong-Ook Park 초소형 위성용 Ka-Band 영상 레이더 시스템 Conference 2021년 한국전자파학회 동계종합학술대회, 2021. @conference{Kim2021, title = {초소형 위성용 Ka-Band 영상 레이더 시스템}, author = {Chul-Ki Kim and Jun-Sung Park and Seong-Ook Park}, year = {2021}, date = {2021-02-17}, booktitle = {2021년 한국전자파학회 동계종합학술대회}, keywords = {Domestic}, pubstate = {published}, tppubtype = {conference} } |
| 369. | Kyung-Bin Bae; Ye-eun Chi; Seong-Ook Park Chirp Pulse 레이다에 적용 가능한 Phase Calibration 기법 및 이를 이용한 소형 드론 탐지 Conference 2021년 한국전자파학회 동계종합학술대회, 2021. @conference{Bae2021, title = {Chirp Pulse 레이다에 적용 가능한 Phase Calibration 기법 및 이를 이용한 소형 드론 탐지}, author = {Kyung-Bin Bae and Ye-eun Chi and Seong-Ook Park}, year = {2021}, date = {2021-02-17}, booktitle = {2021년 한국전자파학회 동계종합학술대회}, journal = {2021년 한국전자파학회 동계종합학술대회}, keywords = {Domestic}, pubstate = {published}, tppubtype = {conference} } |
| 368. | Dong-Chan Kim; Seong-Ook Park Airborne SAR 용 Antenna Pattern 측정 시스템 Conference 2021년 한국전자파학회 동계종합학술대회, 2021. @conference{Kim2021b, title = {Airborne SAR 용 Antenna Pattern 측정 시스템}, author = {Dong-Chan Kim and Seong-Ook Park}, year = {2021}, date = {2021-02-17}, booktitle = {2021년 한국전자파학회 동계종합학술대회}, keywords = {Domestic}, pubstate = {published}, tppubtype = {conference} } |
Publications
2023 |
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| 417. | A Full-Aperture Frequency Scaling Algorithm for Processing Dechirped Sliding Spotlight SAR Data Journal Article IEEE Access, 11 , pp. 92550-92564, 2023. |
| 416. | Multichannel Along-Track Interferometric SAR System Implementation Using FMCW Radar Journal Article IEEE Geoscience and Remote Sensing Letters, 20 , pp. 4009405, 2023. |
| 415. | Hybrid Multibeamforming Receiver with High-Precision Beam Steering for Low Earth Orbit Satellite Communication Journal Article IEEE Transactions on Antennas and Propagation, 71 (7), pp. 5695-5707, 2023. |
| 414. | A Stretched Deramping Radar Technique for High-Resolution SAR Processing in Ka-Band Using the Extended Integration Time Journal Article IEEE Transactions on Instrumentation and Measurement, 72 , 2023. |
| 413. | Commercial Fixed-Wing Drone Redirection System using GNSS Deception Journal Article IEEE Transactions on Aerospace and Electronic Systems, Early Access , 2023. |
2022 |
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| 412. | Utilizing Non-Orthogonal Polarization With Polarization Reuse Technique for 4 × 4 MIMO Capacity Enhancement Journal Article IEEE Access, 10 , pp. 131952-131964, 2022. |
| 411. | Compact electromagnetic lens antennas using cascaded metasurfaces for gain enhancement and beam steering applications Journal Article Internatioinal Journal of RF and Microwave Computer-Aided Engieering, 32 (11), pp. e23327, 2022. |
| 410. | Validation of the feasibility of implementing spotlight SAR mode in the NEXTSat-2 and Ka-Band Satellite Conference The 14th Global Symposium on Millimeter-Waves & Terahertz(GSMM 2022), Korea, 2022. |
| 409. | A Stretched De-Ramping Radar System for High-Quality SAR Image in Ka-Band Conference The 14th Global Symposium on Millimeter-Waves & Terahertz(GSMM 2022), Korea, 2022. |
| 408. | A Novel Phase Detection System Applicable to Calibration Techniques Conference The 14th Global Symposium on Millimeter-Waves & Terahertz(GSMM 2022), Korea, 2022. |
| 407. | A Study on the Feasibility of Stop-and-Go Approximation in FMCW SAR Journal Article Journal of Electromagnetic Engineering and Science, 22 (3), pp. 210-217, 2022. |
| 406. | Ocean Image Formation Algorithm Using Altimeter Data for Next Generation Satellite SAR Journal Article Journal of Electromagnetic Engineering and Science, 22 (2), pp. 85-94, 2022. |
| 405. | An Improved Technique for Single-Channel Video-SAR Based on Fractional Fourier Transform Journal Article IEEE Transactions on Aerospace and Electronic Systems, 2022. |
| 404. | 드론 탐지 레이다 현황 및 기술 소개 Conference 2022년 한국전자파학회 동계종합학술대회, 2022. |
| 403. | 차세대 소형위성 2호에서의 Spotlight SAR mode 구현 가능성 검증 Conference 2022년 한국전자파학회 동계종합학술대회, 2022. |
| 402. | Ka-band SAR 영상 획득 알고리즘 Conference 2022년 한국전자파학회 동계종합학술대회, 2022. |
| 401. | 소형위성 SAR 신호처리를 위한 데이터기반 도플러 파라미터 추출 알고리즘 구현 Conference 2022년 한국전자파학회 동계종합학술대회, 2022. |
| 400. | Ku 밴드 FMCW 트라리앵귤러 첩을 활용한 SAR 이미지 처리 Conference 2022년 한국전자파학회 동계종합학술대회, 2022. |
| 399. | 누설신호 제거 기법이 적용된 잡음 영향 및 Clutter 영향을 최소화하는 FMCW Sensor Conference 2022년 한국전자파학회 동계종합학술대회, 2022. |
| 398. | Chirp Pulse Radar에 적용 가능한 특이 값 분해를 이용한 Clutter 제거 기법 및 이를 이용한 소형 드론 탐지 Conference 2022년 한국전자파학회 동계종합학술대회, 2022. |
| 397. | 위상 검출 시스템을 이용한 밀리미터파 대역 빔포밍 송신기 Conference 2022년 한국전자파학회 동계종합학술대회, 2022. |
| 396. | DDS를 이용한 고해상도 빔포밍 시스템 Conference 2022년 한국전자파학회 동계종합학술대회, 2022. |
| 395. | Sinusoidally modulated leaky wave antenna on Ka-band Conference 2022년 한국전자파학회 동계종합학술대회, 2022. |
| 394. | 네마틱 액정 기반 밀리미터파 가변형 빔포밍 Reflectarray 설계 Conference 2022년 한국전자파학회 동계종합학술대회, 2022. |
| 393. | K-band Wideband Circular Waveguide to Microstrip Transition for Detecting Targets and Anti-jamming Conference 2022년 한국전자파학회 동계종합학술대회, 2022. |
| 392. | 밀리미터파 대역 액정 기반 빔 조향 SIW 누설파 안테나 설계 Conference 2022년 한국전자파학회 동계종합학술대회, 2022. |
| 391. | Leakywave antenna capable of omnidirectional beamforming Conference 2022년 한국전자파학회 동계종합학술대회, 2022. |
| 390. | Generation of Nonlinear Frequency Modulated Chirp Signal using Window Function Conference 2022년 한국전자파학회 동계종합학술대회, 2022. |
| 389. | Side lobe Reduction with Non-uniform Antenna Array using Genetic Algorith Conference 2022년 한국전자파학회 동계종합학술대회, 2022. |
2021 |
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| 388. | High-Efficiency Broadband Planar Array Antenna with Suspended Microstrip Slab for X-Band SAR Onboard Small Satellites Journal Article Sensors, 22 (1), pp. 252, 2021. |
| 387. | 액정 기반 개구결합 마이크로스트립 패치 안테나 Conference 2021 정보통신설비 추계학술대회, 2021. |
| 386. | Ka-band 고효율 리플렉트 어레이에 관한 연구 Conference 2021 정보통신설비 추계학술대회, 2021. |
| 385. | 5G 이동통신 대역에서 빔포밍을 위한 실시간 보정 기법 Conference 2021년 한국전자파학회 추계학술대회, 2021. |
| 384. | IF단 스위칭을 이용한 Chirp Pulse 레이다의 탐지 성능 검증 및 이를 이용한 소형 드론 탐지 Conference 2021년 한국전자파학회 추계학술대회, 2021. |
| 383. | Validity of Stop-and-Go Approximation in High-Resolution Ku-band FMCW SAR with High-Velocity Platform Conference 2021 7th Asia-Pacific Conference on Synthetic Aperture Radar (APSAR), Indonesia, 2021. |
| 382. | High Resolution Digital Beamforming Receiver Using DDS-PLL Signal Generator for 5G Mobile Communication Journal Article IEEE Transactions on Antennas and Propagation, 2021. |
| 381. | FMCW SAR 시스템 사양에 따른 Stop-and-Go 근사의 타당성에 관한 연구 Conference 2021년 한국전자파학회 하계종합학술대회, 2021. |
| 380. | 고이득 위성용 Ka 밴드 Dual Offset Reflect Array 안테나에 대한 연구 Conference 2021년 한국전자파학회 하계종합학술대회, 2021. |
| 379. | AI 알고리즘을 이용한 드론 식별 방법에 대한 연구 Conference 2021년 한국전자파학회 하계종합학술대회, 2021. |
| 378. | Clutter 및 잡음 영향을 최소화하는 FMCW Sensor Conference 2021년 한국전자파학회 하계종합학술대회, 2021. |
| 377. | Calibration 기법에 적용 가능한 새로운 위상 검출 시스템 Conference 2021년 한국전자파학회 하계종합학술대회, 2021. |
| 376. | 밀리미터파 대역 공진 주파수 가변 액정 안테나 설계 Conference 2021년 한국전자파학회 하계종합학술대회, 2021. |
| 375. | Cavity-backed Circular Microstrip Patch Antenna on Ka-band Conference 2021년 한국전자파학회 하계종합학술대회, 2021. |
| 374. | Antenna Pattern Measurements using Beat Frequency in Reverberation Chamber Conference 2021년 한국전자파학회 하계종합학술대회, 2021. |
| 373. | 비허가 무인이동체 재밍을 위한 초경량 휴대형 재머 설계 Conference 2021년 한국전자파학회 하계종합학술대회, 2021. |
| 372. | Implementation of GPS spoofing system for commercial GPS receiver Conference 2021년 한국전자파학회 하계종합학술대회, 2021. |
| 371. | 24 GHz Conformal Antenna with Broad Beamwidth and Wideband for Detecting Target Conference 2021년 한국전자파학회 하계종합학술대회, 2021. |
| 370. | 초소형 위성용 Ka-Band 영상 레이더 시스템 Conference 2021년 한국전자파학회 동계종합학술대회, 2021. |
| 369. | Chirp Pulse 레이다에 적용 가능한 Phase Calibration 기법 및 이를 이용한 소형 드론 탐지 Conference 2021년 한국전자파학회 동계종합학술대회, 2021. |
| 368. | Airborne SAR 용 Antenna Pattern 측정 시스템 Conference 2021년 한국전자파학회 동계종합학술대회, 2021. |