Hyunchul KU


An Efficient Plasma Lighting System with a 300W GaN Power Amplifier Using Band-Limited Pulsed RF Signal
Wonshil KANG Hyunchul KU 
Publication:   
Publication Date: 2017/10/01
Vol. E100-C  No. 10  pp. 934-937
Type of Manuscript:  BRIEF PAPER
Category: Microwaves, Millimeter-Waves
Keyword: 
plasma lighting systempulsed RFGaNpower amplifier
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Geo-Electrical Design of Wideband, Efficient Class-F Power Amplifiers
Youngcheol PARK Hyunchul KU 
Publication:   IEICE TRANSACTIONS on Electronics
Publication Date: 2015/10/01
Vol. E98-C  No. 10  pp. 987-990
Type of Manuscript:  BRIEF PAPER
Category: Electronic Components
Keyword: 
efficiencypower amplifiertransmission linewideband
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A High Efficiency Class-E Power Amplifier Over a Wide Power Range Using a Look-Up Table Based Dynamic Biasing Scheme
Jonggyun LIM Wonshil KANG Kang-Yoon LEE Hyunchul KU 
Publication:   IEICE TRANSACTIONS on Electronics
Publication Date: 2015/04/01
Vol. E98-C  No. 4  pp. 377-379
Type of Manuscript:  BRIEF PAPER
Category: Electronic Circuits
Keyword: 
class-Edynamic biasinglook-up tableharmonic filterpower added efficiency
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Efficient Digital Compensation Technique for Path Imbalances in LINC Transmitters Using Complex Gain and Linear Model
Hyunchul KU 
Publication:   IEICE TRANSACTIONS on Electronics
Publication Date: 2012/07/01
Vol. E95-C  No. 7  pp. 1222-1225
Type of Manuscript:  BRIEF PAPER
Category: 
Keyword: 
error vector magnitudeLINCpath imbalancedigital compensatorcomplex gain
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An Outphasing Scheme for Reducing Spectral Regrowth of Multi-Tone Signal in LINC Transmitter
Hyunchul KU Youngcheol PARK 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2012/02/01
Vol. E95-B  No. 2  pp. 651-654
Type of Manuscript:  LETTER
Category: Wireless Communication Technologies
Keyword: 
outphasingLINCpath mismatcherror vector magnitudespectral regrowthmulti-tone
 Summary | Full Text:PDF(649.3KB)

Architecture and Analysis of Sub-Nyquist Rate Sampling for Behavioral Modeling of Wideband Power Amplifiers
Youngcheol PARK Hyunchul KU 
Publication:   IEICE TRANSACTIONS on Electronics
Publication Date: 2010/10/01
Vol. E93-C  No. 10  pp. 1544-1547
Type of Manuscript:  BRIEF PAPER
Category: Electronic Components
Keyword: 
beharvioral modelmemory effectpower amplifiersampling
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Development of Efficient Discrete Model and Error Analysis for Nonlinear RF Power Amplifiers in Wireless Communications
Hyunchul KU Youngcheol PARK 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2010/09/01
Vol. E93-B  No. 9  pp. 2363-2369
Type of Manuscript:  PAPER
Category: Wireless Communication Technologies
Keyword: 
condition numberleast squarememory polynomialmemory effectsnonlinearpower amplifiersamplingsensitivity
 Summary | Full Text:PDF(710.2KB)

Analysis and Identification of Wiener-Hammerstein System in Frequency Domain Using Two-Tone Measurements for Nonlinear RF Transmitters
Hyunchul KU 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2008/09/01
Vol. E91-A  No. 9  pp. 2435-2441
Type of Manuscript:  Special Section PAPER (Special Section on Nonlinear Theory and its Applications)
Category: Analysis, Modelng and Simulation
Keyword: 
memory effectsnonlinearRF power amplifiertransmittertwo-toneWiBroWiener-Hammerstein
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ACPR Improvement Limitations of Predistortion Linearizer for Nonlinear RF Power Amplifiers
Hyunchul KU Kang-Yoon LEE Young Beom KIM 
Publication:   IEICE TRANSACTIONS on Electronics
Publication Date: 2006/04/01
Vol. E89-C  No. 4  pp. 466-472
Type of Manuscript:  Special Section PAPER (Special Section on Advanced RF Technologies for Compact Wireless Equipment and Mobile Phones)
Category: 
Keyword: 
adjacent channel power ratio (ACPR)nonlinearitypredistortion (pre-D)power amplifier (PA)spectral regrowth802.11g
 Summary | Full Text:PDF(648.2KB)

A Fast Switching Low Phase Noise CMOS Frequency Synthesizer with a New Coarse Tuning Method for PHS Applications
Kang-Yoon LEE Hyunchul KU Young Beom KIM 
Publication:   IEICE TRANSACTIONS on Electronics
Publication Date: 2006/03/01
Vol. E89-C  No. 3  pp. 420-428
Type of Manuscript:  PAPER
Category: Integrated Electronics
Keyword: 
frequency synthesizerPHSCMOSlock-timephase noisecoarse tuningcurrent mismatch
 Summary | Full Text:PDF(1.7MB)