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 system, pulsed RF, GaN, power 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: 
efficiency, power amplifier, transmission line, wideband, 
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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-E, dynamic biasing, look-up table, harmonic filter, power 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 magnitude, LINC, path imbalance, digital compensator, complex 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: 
outphasing, LINC, path mismatch, error vector magnitude, spectral regrowth, multi-tone, 
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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 model, memory effect, power amplifier, sampling, 
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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 number, least square, memory polynomial, memory effects, nonlinear, power amplifier, sampling, sensitivity, 
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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 effects, nonlinear, RF power amplifier, transmitter, two-tone, WiBro, Wiener-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), nonlinearity, predistortion (pre-D), power amplifier (PA), spectral regrowth, 802.11g, 
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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 synthesizer, PHS, CMOS, lock-time, phase noise, coarse tuning, current mismatch, 
 Summary | Full Text:PDF