Search Results - "Chan-Sei Yoo"

Low Dielectric Constant Characteristics of Styrene and Maleimide Anhydride Copolymer with Modification for High Frequency Application of Printed Circuit Board by Lee, Pilwoo, Jung, Hunsang, Yoo, Chan-Sei, Lee, Hyun Ho

“…Recently, due to the intensive and fast progress of the high frequency wireless communication environment, including 5th generation (5G) wireless…”
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Lifetime estimation for optocouplers using accelerated degradation test by Kang, Minkoo, Lee, Sunjae, Park, Heedo, Jang, Joongsoon, Park, Sangchul, Kim, Jong‐Ho, Yoo, Chan‐Sei

“…Instrumentation and control systems significantly affect the safety and reliability of nuclear power plants. In this study, we analyze the cause of failure of…”
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Effects of the morphology of CIPs on microwave absorption behaviors by Woo, Soobin, Yoo, Chan-Sei, Kim, Hwijun, Lee, Mijung, Quevedo-Lopez, Manuel, Choi, Hyunjoo

“…Electromagnetic (EM) wave absorption properties are affected by the thickness and surface area of absorbing materials. In this study, a facile ball-milling…”
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Development of CIP/graphite composite additives for electromagnetic wave absorption applications by Woo, Soobin, Yoo, Chan-Sei, Kim, Hwijun, Lee, Mijung, Quevedo-Lopez, Manuel, Choi, Hyunjoo

“…In this study, the electromagnetic (EM) wave absorption ability of carbonyl iron powder (CIP)/graphite composites produced by ball milling were studied in a…”
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Hybrid Current-Mode Class-S Power Amplifier With GaN Schottky Diode Using Chip-On-Board Technique for 955 MHz LTE Signal by PARK, Jun-Chul, YOOK, Jong-Gwan, BONG HYUK PARK, NAMCHEOL JEON, SEO, Kwang-Seok, DONGSU KIM, LEE, Woo-Sung, YOO, Chan-Sei

“…This paper presents a gallium nitride (GaN)-based hybrid current-mode class-S (CMCS) power amplifier (PA) using a bandpass delta-sigma modulator (BPDSM) for a…”
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Power and frequency bandwidth improvement of piezoelectric energy harvesting devices using phase-shifted synchronous electric charge extraction interface circuit by Lefeuvre, Elie, Badel, Adrien, Brenes, Alexis, Seok, Seonho, Yoo, Chan-Sei

“…This article presents a new way to control the synchronous electric charge extraction interface circuit, which was formerly developed to improve the…”
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GaN HEMT-based hybrid current-mode class-S power amplifier for 955 MHz LTE signal by Park, Jun-Chul, Yook, Jong-Gwan, Park, Bong Hyuk, Yoo, Chan-Sei, Kim, Dongsu, Lee, Woo Sung

“…ABSTRACT This article presents a gallium nitride‐based hybrid current‐mode class‐S (CMCS) power amplifier (PA) in conjunction with a realized band‐pass…”
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Development of Cost-Effective Ni-Less Surface Finishing Process for High-Speed PCBs by Park, Jaeseong, Kim, Daegeun, Yoo, Chan-Sei, Lim, Taeho, Chung, Bo-mook

“…The growing need to use low-power and high-frequency signals for the high-speed transmission of large-capacity data is driving the demand for suitable printed…”
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High power, broadband Class-J PA with internally pre-matched FET by Eun-Jae Lim, Young-Chul Rhee, Chan-Sei Yoo

“…In the broadband design of a Class-J power amplifier using GaN HEMT, the operation of Class-B due to zero crossings of 2nd harmonic frequency load impedance…”
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Tunable unipolar synchronized electric charge extraction strategy for piezoelectric energy harvesting by Brenes, Alexis, Lefeuvre, Elie, Seok, Seonho, Yoo, Chan-Sei

“…This article focuses on an intelligent control strategy to improve the performances of shunt-rectifier architectures for vibration energy harvesting. It…”
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Synthesis and characterization of porous forsterite (Mg2SiO4)-filled polystyrene composites by Dong, Xue, Asghar, Ghulam, Yoo, Chan-Sei, Woo, Chaeheon, Jeon, Jiho, Kang, Jinsu, Zhang, Xiaojie, Bang, Hyeonseok, Kim, Yoengjin, Oh, Hyung-Suk, Yu, Hak Ki, Choi, Jae-Young

“…With the increasing demand for wireless communication technology in the microwave frequency range, the development of composite materials with low dielectric…”
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Dielectric properties of low-temperature sintered forsterite (Mg2SiO4) using high-dispersion and nanoparticle-based solid-state reaction process by Asghar, Ghulam, Dong, Xue, Chae, Sudong, Yoo, Chan-Sei, Jeon, Jiho, Woo, Chaeheon, Kim, Tae Yeong, Ahn, Jungyoon, Zhang, Xiaojie, Oh, Hyung-Suk, Yu, Hak Ki, Choi, Jae-Young

“…•Pure forsterite phase was obtained at 1000 °C by using high-dispersion and nanoparticle synthesis.•The forsterite showed dielectric properties with εr = 3.9…”
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SiNx Prepassivation of AlGaN/GaN High-Electron-Mobility Transistors Using Remote-Mode Plasma-Enhanced Chemical Vapor Deposition by Her, Jin-Cherl, Cho, Hyun-Jun, Yoo, Chan-Sei, Cha, Ho-Young, Oh, Jae-Eung, Seo, Kwang-Seok

“…The surface of AlGaN/GaN high-electron-mobility transistors (HEMTs) tends to be easily damaged during device fabrication, especially during high-temperature…”
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GaN HEMT based high-efficiency current-mode class-D amplifier using chip-on-board technique by Park, Jun-Chul, Yoo, Chan-Sei, Kang, Wonshil, Kim, Dongsu, Yook, Jong-Gwan, Lee, Woo Sung

“…This article presents a high efficiency current‐mode class‐D (CMCD) amplifier using a GaN high electron mobility transistor (HEMT) for class‐S system—a…”
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Synthesis of hollow forsterite by coating method and study of its dielectric properties by Asghar, Ghulam, Dong, Xue, Chae, Sudong, Yoo, Chan-Sei, Oh, Seungbae, Choi, Kyung Hwan, Jeon, Jiho, Woo, Chaeheon, Kim, Tae Yeong, Ahn, Jungyoon, Oh, Hyung-Suk, Yu, Hak Ki, Choi, Jae-Young

“…Wireless communication technologies are operating at higher frequencies in the current ubiquitous age, dielectrics with low dielectric constant and low…”
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A v-band compect bandpass filter in Si-BCB technology using the coupled-line resonators by Chan-Sei Yoo, Jongchul Park, Young-Chul Rhee, Kwang-Seok Seo

“…This letter presents a V-band compact bandpass filter in Si-BCB technology. The coupled line resonator employing the tight coupling-broadside coupled-structure…”
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Synthesis and Characterization of a Porous Ga2O3 Material with a Low Dielectric Constant by Dong, Xue, Woo, Chaeheon, Yoo, Chan-Sei, Kim, Tae Yeong, Zhang, Xiaojie, Kim, Yeongjin, Kang, Jinsu, Jeon, Jiho, Bang, Hyeon-Seok, Kim, Youngho, Park, Jae-Hyuk, Yu, Hak Ki, Choi, Jae-Young

“…In the context of contemporary wireless communication technologies, operational frequencies have considerably escalated. Consequently, the demand for…”
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Efficiency enhancement of the Doherty amplifier for 3.5 GHz WiMAX application using class-F circuitry by Park, Jun-Chul, Kim, Dongsu, Yoo, Chan-Sei, Lee, Woo Sung, Yook, Jong-Gwan, Hahn, Cheol Koo

“…This article presents a high‐power and high‐efficiency saturated Doherty amplifier using a GaN high electron mobility transistor for 3.5 GHz Worldwide…”
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W-band compact bandpass filters on thin-film substrate by Yoo, Chan-Sei, Maeng, Ji-Min, Cheon, Nam-Cheol, Song, Sangsub, Seo, Kwang-Seok

“…In this article, the miniaturized resonator and bandpass filter for W‐band application are suggested and evaluated on thin‐film substrate.In the meanwhile, the…”
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RF Front-End Passive Circuit Implementation Including Antenna for ZigBee Applications by YOO, Chan-Sei, LEE, Joong-Keun, KIM, Dongsu, PARK, Seong-Dae, WON, Kwang-Ho, KANG, Nam-Kee, SEO, Kwang-Seok, LEE, Woo-Sung

“…This paper presents a front-end passive circuit module for ZigBee applications using low-temperature co-fired ceramic technology. The front-end part consists…”
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