Publications

@article{Sim2018b,
title = {Design of new reverberation chamber for electromagnetic compatibility and wireless device measurement applications and its reproducibility performance validation},
author = {Dong-Uk Sim and Sang-Il Kwak and Jong-Hwa Kwon and Seong-Ook Park},
url = {http://ma.kaist.ac.kr/wp-content/uploads/2020/02/Sim_et_al-2019-Microwave_and_Optical_Technology_Letters.pdf},
doi = {http://dx.doi.org/10.1002/mop.31644},
year = {2018},
date = {2018-11-26},
journal = {Microwave and Optical Technology Letters},
volume = {61},
number = {3},
pages = {801 - 804},
abstract = {This article proposes new reverberation chamber structure for electromagnetic compatibility and wireless device measurement applications. It consists of dual plate type mode stirrers and two types of reflectors that improve its original field uniformity. Based on the SD and eigenmode analysis, their effect is demonstrated, and through the final measured results, it is shown that the proposed reverberation chamber has excellent SD characteristic of <2.5 dB at 650 MHz or higher. In addition, from the viewpoint of its utilization, it is verified that for over the air performance of a commercial long‐term evolution mobile phone, its experimental reproducibility is very high, and its results show little difference from those obtained in the anechoic chamber.},
keywords = {International},
pubstate = {published},
tppubtype = {article}
}

@article{Sim2018,
title = {Development and Validation of New Reverberation Chamber for Wireless Devices},
author = {Dong-Uk Sim and Sang-Il Kwak and Jong-Hwa Kwon and Seong-Ook Park},
url = {http://143.248.148.42/wordpress/wp-content/uploads/2018/10/7068601.pdf},
year = {2018},
date = {2018-06-26},
journal = {Wireless Communications and Mobile Computing},
pages = {12},
abstract = {This paper proposes a reverberation chamber structure consisting of new reflectors and mode stirrers for electromagnetic compatibility and wireless terminal measurements. The key design considerations for them are determined through a reasonable approach to analyze the eigenmode for a reverberation chamber and the standard deviation of its working volume based on 3D simulation. The final designs are expected to improve the standard deviation performance of the initial structure of the reverberation chamber and provide a better mode stirring environment. The results measured in the fabricated chamber demonstrate that these predictions are clearly realized. The results satisfy the main requirements of this paper, which are defined in consideration of the specifications of commercial reverberation chamber products. Therefore, the reverberation chamber of this paper is expected to be useful for performance measurement and evaluation of commercial wireless terminals. To verify this logical approach to obtain a good design and its results, the results measured in the actual fabricated reverberation chamber are described along with analytical and computational results.},
keywords = {International},
pubstate = {published},
tppubtype = {article}
}

@article{Sim2016,
title = {Design of multiband electromagnetic wave absorber based on a periodic surface for electromagnetic wave measurement facility applications},
author = {Dong-Uk Sim and Jong-Hwa Kwon and Seong-Ook Park},
url = {http://143.248.148.42/wordpress/wp-content/uploads/2018/10/Sim_et_al-2017-Microwave_and_Optical_Technology_Letters.pdf},
doi = {10.1002/mop.30318},
year = {2016},
date = {2016-12-22},
journal = {Microwave and Optical Technology Letters},
volume = {59},
pages = {478 - 481},
abstract = {In this paper, the periodic structure‐based absorber operating at dual‐band or more for applying to new electromagnetic wave measurement facility that does not contain a conventional pyramidal absorber is presented. To achieve the objective, the absorber structure takes the format of two‐layer periodic surfaces. Based on the logical design principles, the parametric study results to obtain the desired performance and the final experimental result are addressed. The measured result shows a broadband reflectivity characteristic from 0.60 to 3.27 GHz on the basis of below −10 dB. As a result, the absorber shows the performance supporting CDMA, WCDMA, and WLAN bands in the electromagnetic wave measurement facility.},
keywords = {International},
pubstate = {published},
tppubtype = {article}
}

@article{Hwang2016,
title = {Effect of Electromagnetic Interference on Human Body Communication},
author = {Jung-Hwan Hwang and Tae-Wook Kang and Jong-Hwa Kwon and Seong-Ook Park},
url = {http://143.248.148.42/wordpress/wp-content/uploads/2018/10/07574274.pdf},
doi = {10.1109/TEMC.2016.2598582},
year = {2016},
date = {2016-09-22},
journal = {IEEE Transactions on Electromagnetic Compatibility},
volume = {59},
pages = {48 - 57},
abstract = {In human body communication (HBC), the human body is used as a medium for transmitting data between devices as a replacement for wired and wireless technologies. The human body functions as an antenna in the low-frequency band used by HBC. Owing to this antenna function, electromagnetic waves radiating from electronic devices or wireless services cause electromagnetic interference (EMI) in HBC devices. This paper addresses such EMI in HBC devices. The interference signal caused by EMI was measured while the human subject, who was using an HBC device, was exposed to a general EMI environment at multiple sites. Using the interference model obtained from the measured interference signals, bit-error-rate degradation caused by the interference signal was simulated. The interference model presented in this paper can be effectively used to achieve reliable data communication in various HBC devices.},
keywords = {International},
pubstate = {published},
tppubtype = {article}
}

@article{Sim2016b,
title = {An ultracompact CRLH-TL bandpass filter for VHF applications},
author = {Dong-Uk Sim and Jeong-Ho Ju and Jong-Hwa Kwon and Seong-Ook Park},
url = {http://143.248.148.42/wordpress/wp-content/uploads/2018/10/Sim_et_al-2016-Microwave_and_Optical_Technology_Letters.pdf},
doi = {10.1002/mop.29641},
year = {2016},
date = {2016-01-27},
journal = {Microwave and Optical Technology Letters},
volume = {58},
pages = {694 - 697},
abstract = {This article proposes a new design approach to an ultracompact composite right‐/left‐handed transmission line (CRLH‐TL) bandpass filter with good passband and very broad stopband performances. In order to reduce the size, a series connection of the interdigital capacitor and shorted spiral inductor for realizing CRLH‐TL is adopted and optimized to create the target Terrestrial‐Digital Multimedia Broadcasting (T‐DMB, 174–216 MHz) bandpass filtering. T‐DMB was developed in South Korea. The results of a Bloch impedance analysis suggest that the proposed approach generates good impedance matching. The proposed filter has overall dimensions of λg/19 by λg/34 in terms of a center frequency of 180 MHz, a 3 dB fractional bandwidth of over 28%, an insertion loss of much lower than 2 dB, and a good return loss performance in the predicted and measured results.},
keywords = {International},
pubstate = {published},
tppubtype = {article}
}

@article{Sim2015,
title = {Design of electromagnetic wave absorber using periodic structure and method to broaden its bandwidth based on equivalent circuit-based analysis},
author = {Dong-Uk Sim and Jong-Hwa Kwon and Seong-Ook Park},
url = {http://143.248.148.42/wordpress/wp-content/uploads/2018/10/07027647.pdf},
doi = {10.1049/iet-map.2013.0487},
year = {2015},
date = {2015-02-05},
journal = {IET Microwaves Antennas & Propagation},
volume = {9},
pages = {142 - 150},
abstract = {A new broadband electromagnetic wave absorber based on a periodic surface and a method to increase its absorption bandwidth is proposed. The proposed absorber structure shows broadband characteristics, and its bandwidth is improved by generating additional resonances through a reasonable approach. To provide an understanding of the logical design procedure, an analytical method to determine the sheet resistance and new equivalent circuit models for analysing the impedance are both presented. From the analysis, it is shown that the exact range of the sheet resistance corresponding to the desired absorption level can be efficiently estimated for the resonance of the structure. For the verification of this approach to obtain an efficient design, as well as the functionality of both the absorber and the proposed method, experimental results are demonstrated along with analytical and computational results. The final measured results using the proposed method show a broadband reflectivity response, with a fractional bandwidth of approximately 93% below -10 dB and a bandwidth increase of 17%.},
keywords = {International},
pubstate = {published},
tppubtype = {article}
}

@conference{Sim2014,
title = {Design of electromagnetic wave absorber using periodic structure and equivalent circuit-based analysis},
author = {Dong-Uk Sim and Jong-Hwa Kwon and Seong-Ook Park},
url = {http://143.248.148.42/wordpress/wp-content/uploads/2018/10/07026770.pdf},
doi = {10.1109/ISANP.2014.7026770},
year = {2014},
date = {2014-12-02},
booktitle = {2014 International Symposium on Antennas and Propagation Conference Proceedings},
address = {Taiwan},
abstract = {In this paper, new electromagnetic wave absorber based on periodic structure and equivalent circuit-based analysis are presented. The proposed structure shows a broadband characteristic, and its bandwidth is improved by generating additional resonance through the reasonable approach based on impedance analysis and equivalent circuit. For the verification of this approach, the functionality of the absorber, the proposed technique, and the experimental results are demonstrated along with analytical and computational results.},
keywords = {International},
pubstate = {published},
tppubtype = {conference}
}

@conference{Sim2010,
title = {Design of a Resonant Microwave Absorber},
author = {Dong-Uk Sim and Jong-Hwa Kwon and Sang-Il Kwak and Hyung-Do Choi and Seong-Ook Park},
url = {http://143.248.148.42/wordpress/wp-content/uploads/2018/10/73.pdf},
year = {2010},
date = {2010-11-23},
booktitle = { International Symposium on Antennas and Propagation},
address = {Macao},
keywords = {International},
pubstate = {published},
tppubtype = {conference}
}