Search Results - "Yongshik Lee"

Multifunctional coil technique for alignment-agnostic and Rx coil size-insensitive efficiency enhancement for wireless power transfer applications by Yoon, Seoyeon, Lim, Taejun, Lee, Yongshik

“…This paper presents a multifunctional coil technique to enhance the transfer efficiency of an inductively-coupled wireless power transfer (WPT) system,…”
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A -Transform Method for Synthesis of Unequal-Length Multisection Transmission Lines for Multiband Applications by Kim, Joonsuk, Lee, Yongshik

“…A method based on the Z-transform is demonstrated to cascade transmission line sections of unequal lengths and achieve multiband and/or wideband properties…”
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Wideband Branch-Line Couplers With Single-Section Quarter-Wave Transformers for Arbitrary Coupling Levels by LEE, Seungku, LEE, Yongshik

“…Wideband branch-line couplers with arbitrary coupling levels are demonstrated. By integrating single-section quarter-wave transformers at each port, wideband…”
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Dual-Band Branch-Line Coupler Based on Crossed Lines for Arbitrary Power-Split Ratios by Chang, Hyungjun, Lim, Taejun, Dimitrov, Kristian Chavdarov, Lee, Yongshik

“…Dual-band branch-line couplers with arbitrary power-split ratios are presented. The use of crossed lines at the center of the dual-band coupler enables it to…”
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Compensation for Lateral Misalignment in Litz Wire Based on Multilayer Coil Technology by Chang, Hyungjun, Lim, Taejun, Lee, Yongshik

“…This study applies a multilayer coil technology that can compensate for a decrease in transfer efficiency due to a lateral misalignment in a practical 100…”
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A Planar Dual-Band Periodic Leaky-Wave Antenna Based on a Mu-Negative (MNG) Transmission Line by Simorangkir, Roy B. V. B., Yongshik Lee

“…In this study, a planar periodic leaky-wave antenna (LWA) that provides a dual-band full-space scanning property is presented. The LWA is based on a…”
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An Inductor-Loaded Microstrip Directional Coupler for Directivity Enhancement by LEE, Seungku, LEE, Yongshik

“…A directivity-enhancement technique is demonstrated for a microstrip directional coupler. By loading the coupler with shunt inductors, the phase velocities of…”
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Compensation of Heat Effect in Dielectric Barrier Discharge (DBD) Plasma System for Radar Cross-Section (RCS) Reduction by Jung, Jinwoo, Cho, Changseok, Choi, Minsu, You, Shinjae, Ha, Jungje, Lee, Hyunsoo, Kim, Cheonyoung, Oh, Ilyoung, Lee, Yongshik

“…In this study, the problems encountered in radar cross-section (RCS) measurement experiments utilizing a dielectric barrier discharge (DBD) plasma system are…”
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An Inductive-Loading Method for Directivity Enhancement of Microstrip Coupled-Line Couplers by Ha, Jungje, Shin, Woongjae, Lee, Yongshik

“…This letter demonstrates a series-inductive loading method for the directivity enhancement of microstrip coupled-line couplers. The method has an extreme…”
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Generalized Miniaturization Method for Coupled-Line Bandpass Filters by Reactive Loading by LEE, Seungku, LEE, Yongshik

“…This paper presents a generalized miniaturization method for coupled-line bandpass filters by reactive loading, including the series-inductive loading method…”
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Tunable Coil-Links for Multiple-Receiver Wireless Power Transfer System With Arbitrary Position and Power Division by Lim, Taejun, Lee, Jaemin, Lee, Yongshik

“…This study demonstrates tunable coil links for a wireless power transfer system with arbitrarily-located multiple receivers and arbitrary power division…”
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Interdigital Capacitor-Based Passive LC Resonant Sensor for Improved Moisture Sensing by Dimitrov, Kristian Chavdarov, Song, Sanghun, Chang, Hyungjun, Lim, Taejun, Lee, Yongshik, Kwak, Byung-Jae

“…Herein, a passive low-profile moisture sensor design based on radio frequency identification (RFID) technology is proposed. The sensor consists of an LC…”
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A Design Method for Microstrip Directional Couplers Loaded With Shunt Inductors for Directivity Enhancement by LEE, Seungku, LEE, Yongshik

“…An accurate design method is proposed for directivity enhancement of microstrip directional couplers loaded with shunt inductors. The parasitic effects of…”
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On Encapsulated Dielectric Barrier Discharge Plasma Sources for Radar Cross Section Reduction in Mobile Environments by Choi, Minsu, You, Shin-Jae, Jung, Jinwoo, Cho, Changseok, Lee, Yongshik, Kim, Cheonyoung, Ha, Jungje, Lee, Hyunsoo, Seol, Youbin

“…This paper deals with the practical application of Radar Cross Section (RCS) reduction technology using plasma. Although various plasma application…”
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Smart Small Cell with Hybrid Beamforming for 5G: Theoretical Feasibility and Prototype Results by Jang, Jinyoung, Chung, MinKeun, Hwang, Seung Chan, Lim, Yeon-Geun, Yoon, Hong-jib, Oh, TaeckKeun, Min, Byung-Wook, Lee, Yongshik, Kim, Kwang Soon, Chae, Chan-Byoung, Kim, Dong Ku

“…In this article, we present a real-time 3D hybrid beamforming approach for 5G wireless networks. One of the key concepts in 5G cellular systems is the small…”
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Plasma Generator with Dielectric Rim and FSS Electrode for Enhanced RCS Reduction Effect by Oh, Taejoo, Cho, Changseok, Ahn, Wookhyun, Yook, Jong-Gwan, Lee, Jangjae, You, Shinjae, Yim, Jinwoo, Ha, Jungje, Bae, Gihun, You, Heung-Cheol, Lee, Yongshik

“…In this study, a method was experimentally verified for further reducing the radar cross-section (RCS) of a two-dimensional planar target by using a dielectric…”
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Dual-Polarization Slot Antenna With High Cross-Polarization Discrimination for Indoor Small-Cell MIMO Systems by Oh, TaeckKeun, Lim, Yeon-Geun, Chae, Chan-Byoung, Lee, Yongshik

“…We demonstrate a dual-polarization slot antenna for indoor small-cell multiple-input-multiple-output (MIMO) systems. The symmetric structure and differential…”
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Low Frequency Gain Enhancement of Cavity-Backed Electrically-Small Hybrid Spiral Antenna for High-Voltage Partial Discharge Sensing by Dimitrov, Kristian Chavdarov, Lee, Yongshik, Youn, Jae-Ho, Park, Chan-Uk, Oh, Seung Won, Lee, Myoung-Soo

“…In this study, we propose a sensor for partial discharge (PD) sensing based on an electrically small hybrid spiral antenna, measuring approximately 0.087…”
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A Planar Dual-Band Filter Based on Reduced-Length Parallel Coupled Lines by LEE, Seungku, LEE, Yongshik

“…A planar dual-band filter is demonstrated that is based on reduced-length parallel coupled lines. By reactively loading a reduced-length coupled line, a…”
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On radar cross section reduction effect by filamentary discharge in a dielectric barrier discharge by Minsu Choi, Shin-Jae You, Jinwoo Jung, Changseok Cho, Yongshik Lee, Cheonyoung Kim, Jungje Ha, Hyunsoo Lee, Youbin Seol

“…In Radar Cross Section (RCS) reduction as a military technology, dielectric barrier discharge (DBD) plasma is one of the most effective methods. For RCS…”
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