[International Conference]

2011

Hankyu Lee, Heesong Seo, Inyoung Choi, Taeyoung Chung, Daechul Jeong, and Bumman Kim, “A RF CMOS Band-pass Tracking Filter with Enhanced Q and High Linearity,” in Asia-Pacific Microwave Conference (APMC) 2011, Melbourne, Australia, 5-8, Dec. 2011.
Seunghoon Jee , Junghwan Moon, Jungjoon Kim, Junghwan Son, and Bumman Kim, “Class-E Power Amplifier Optimization for Operation above Maximum Frequency,” IEEE Conference on Microwaves, Communications, Antennas and Electronics Systems, Tel aviv, Isreal, 7-9, Nov. 2011.
Junghwan Son, Ildu Kim, Junghwan Moon, Juyeon Lee, and Bumman Kim, “A Highly Efficient Asymmetric Doherty Power Amplifier with a New Output Combining Circuit,” IEEE Conference on Microwaves, Communications, Antennas and Electronics Systems, Tel aviv, Isreal, 7-9, Nov. 2011.
Bumman Kim, “Multiband-Multiband PA operation,” invited talk, in 10th Int. conf. on Telecommunication in Modern Satelite, Cable and Broadcasting Services (TELSIKS), Serbia, Nis, Out. 2011.
Junghwan Moon, Juyeon Lee, Junghwan Son, Jungjoon Kim, Seunghoon Jee, Seungchan Kim, and Bumman Kim, “Effects of even-order terms on behavior model of envelope tracking transmitters,” in Proc. 41th Eur. Microw. Conf., Manchester, UK, Oct. 2011
Junghwan Moon, Seunghoon Jee, Jungjoon Kim, and Bumman Kim, “Investigation of a class-F^-1 power amplifier with a nonlinear C_out,” in Proc. 41th Eur. Microw. Conf., Manchester, UK, Oct. 2011.
Daehyun Kang, Dongsu Kim, Jooseung Kim, Yunsung Cho, Byungjoon Park, Chenxi Zhao, and Bumman Kim, “Envelope-Tracking Two-Stage Power Amplifiers,” in Proc. 41th Eur. Microw. Conf., Manchester, UK, Oct. 2011
Jungjoon Kim, Junghwan Moon, Junghwan Son, Seunghoon Jee, Juyeon Lee, Jeonghyeon Cha, Ildu Kim, and Bumman Kim, “Highly Efficient Envelope Tracking Transmitter by Utilizing Sinking Current,” in Proc. 41th Eur. Microw. Conf., Manchester, UK, Oct. 2011.
Dongsu Kim, Daehyun Kang, Jooseung Kim, Yunsung Cho, and Bumman Kim, ”Linearity Improvement of Envelope Tracking Power Amplifier Using Gain Compensated Predistortion,” in Proc. 41th Eur. Microw. Conf., Manchester, UK, Oct. 2011.
Bumman Kim, “ET PA for handset application,” invited talk in Proc. 41th Eur. Microw. Conf., Manchester, UK, Oct. 2011.
Bumman Kim, “Flexible Doherty Power Amplifier for Intelligent Radio” Keynote speech, 2011 IEEE MTT-S Int. Microw. Workshop Series on Intelligent Fadio for Future Personal Terminals, Daejeon, KOREA, 24-25 Aug. 2011.
Junghwan Moon, Junghwan Son, Juyeon Lee, Jungjoon Kim, Seunghoon Jee, Seungchan Kim, and Bumman Kim, “A multimode/multiband envelope tracking transmitter with broadband saturated power amplifier,” in IEEE MTT-S Int. Microw. Sympo. Dig., Baltimore, USA, Jun. 2011.
Daehyun Kang, Dongsu Kim, Yunsung Cho, Jooseung Kim, Byungjoon Park, Chexni Zhao, and Bumman Kim, “1.6-2.1 GHz broadband Doherty power amplifiers for LTE handset applications,” in IEEE MTT-S Int. Microw. Sympo. Dig., Baltimore, USA, Jun. 2011.
Junghwan Moon, Juyeon Lee, and Bumman Kim, “Highest Efficiency Award at Student High-efficiency Power Amplifier Design Competition,” in IEEE MTT-S Int. Microw. Symp. Dig., Baltimore, MD, USA, Jun. 2011.
Heesong Seo, Inyoung Choi, Changjoon Park, Jehyung Yoon, and Bumman Kim, “Digital RF Receiver Front-end With Wideband Operation Capability for m-WiMAX,” in IEEE Radio Frequency Integrated Circuits (RFIC) Symp., Baltimore, MD, USA, 5~7 Jun, 2011.
Bumman Kim, “Linear Power Amplifier Design for Mobile Communications” Tutorial talk, IEEE Wireless and Microwave Technology Conference (WAMICON) 2011. Hilton Clearwater Beach Florida, USA, 18-19 Apr. 2011.
Bumman Kim, “Flexible Doherty power amplifiers for base station applications; multi way and ET operation” invited speaker at forum, 2011 IEEE International Solid-State Circuits Conference, San Francisco, USA, 20~24 Feb. 2011.
Bumman Kim, “Interactive workshop on Power Amplifier Efficiency and Linearity Enhancement” Panel Session. 2011 IEEE Radio and Wireless Symposium (RWS), Phoenix Az, USA, 16-19 Jan. 2011.

2010

Bumman Kim, “Digitally Enhanced Linear Power Amplifier” invited talk, in Asia-Pacific Microwave Conference (APMC) 2010, Yokohama, Japan, Dec. 2010.
Bumman Kim, “Modeling and Design Techniques for High Power Amplifiers and their Performance” short course, in Asia-Pacific Microwave Conference (APMC) 2010, Yokohama, Japan, Dec. 2010.
Bumman Kim, “Recent trend of Power Amplifiers for transmitters of Mobile Communication” keynote speech, 2010 International Conference on Advanced Technologies for Communications, Ho Chi Minh City, Vietnam, 20~22 Oct. 2010.

Daehyun Kang, Jinsung Choi, Dongsu Kim, Bumman Kim, “LTE power amplifier for envelope tracking polar transmitters,” Proc. 40th Eur. Microw. Conf., Paris, France, Sep. 2010.
Junghwan Son, Jungjoon Kim, Junghwan Moon, Ildu Kim, Seunghoon Jee, and Bumman Kim, "3.5-GHz High Efficient Envelope Tracking Transmitter System for Base Station" Proc. 40th Eur. Microw. Conf., Paris, France, Sep. 2010.
Jungjoon Kim, Junghwan Moon, Daehyun Kang, Seunghoon Jee, Young Yun Woo, and Bumman Kim, "Doherty power amplifier design employing direct input power dividing for base station applications," Proc. 40th Eur. Microw. Conf., Paris, France, Sep. 2010.
Junghwan Moon and Bumman Kim, "Wideband digital feedback predistortion employing segmented memory compensation for linearization of Doherty amplifier," Proc. 40th Eur. Microw. Conf., Paris, France, Sep. 2010.
Bumman Kim, “Recent Trend of Power Amplifiers for Transmitters of Mobile Communications” invited talk, in 2010 IEEE Lester Eastman Conf., on High Performance Devices, New York, Aug., 2010.
Bumman Kim, “Gallium Nitride vs the Rest of the III-V’s” Panel Session, in 2010 IEEE Lester Eastman Conf., on High Performance Devices, New York, Aug., 2010.
Bumman Kim, Daehyun Kang, Jinsung Choi, and Dongsu Kim, “Doherty power amplifiers for handset applications”, invited paper 18^th Int. Conf. on Microw., Radar., Wireless Commun. MIKON-2010, Lithuania, Jun. 2010.
Bumman Kim, Junghwan Moon, and Jungjoon Kim "Highly efficient saturated power amplifier based on GaN - A class P amplifier ," invited talk, workshop, IEEE MTT-S Int. Microw. Sympo,. Dig. Anaheim, USA, May, 2010.
Ildu Kim, and Bumman Kim, "A 2.655 GHz 3-stage Doherty power amplifier using envelope tracking technique," IEEE MTT-S Int. Microw. Sympo. Dig. Anaheim, USA, May, 2010.
Dongsu Kim, Jinsung Choi, Daehyun Kang, and Bumman Kim, “High Efficiency and Wideband Envelope Tracking Power Amplifier with Sweet Spot Tracking,” in IEEE Radio Frequency Integrated Circuits (RFIC) Symp., Anaheim, CA, USA, 23~25 May, 2010.
Jinsung Choi, Dongsu Kim, Daehyun Kang, Jungmin Park, Boshi Jin, and Bumman Kim, “Envelope Tracking Power Amplifier Robust to Battery Depletion,” in IEEE MTT-S Int. Microw. Sympo. Dig., Anaheim, CA, USA, 23~28 May, 2010.

Daehyun Kang, Jinsung Choi, Dongsu Kim, Daekyu Yu, Kyoungjoon Min, and Bumman Kim, “30.3% PAE HBT Doherty power amplifier for 2.5~2.7 GHz Mobile WiMAX,” IEEE MTT-S int. Microw. Symp. Dig. Anaheim, USA, May, 2010.
Junghwan Moon, Junghwan Son, Jungjoon Kim, Ildu Kim, Seunghoon Jee, Young Yun Woo, and Bumman Kim, "Doherty amplifier with envelope tracking for high efficiency," IEEE MTT-S Int. Microw. Sympo. Dig. Anaheim, USA, May, 2010.
Bumman Kim, "Recent trend of power amplifiers for mobile communication," keynote speech. 2010 Int. Conf. on Microw. and Millimeter Wave Techn., Chengdu, China, 8~11 May, 2010.
Boshi Jin, Junghwan Moon, and Bumman Kim, "A wideband CMOS power amplifier design for 2.3-GHz and 2.6-GHz m-WiMAX system," 2010 Int. Conf. on Microw. and Millimeter Wave Techn., Chengdu, China, 8~11 May, 2010.

Bumman Kim, Jinsung Choi, Daehyun Kang, and Dongsu Kim, “A Multi-mode envelope tracking power amplifier for software defined radio transmitters,” invited paper in IEEE Int. Microw. Workshop Series on RF Front-ends for Software Defined and Cognitive Radio Solutions, Feb. 2010.

Bumman Kim, “Interactive Panel Session on Power Amplifiers,” panel session, 2010 IEEE Radio and Wireless Symposium (RWS), LA, USA, 10~14 Jan. 2010.

Bumman Kim, “Linear Power Amplifiers for Mobile Com-munication Systems,” distinguished lecture, 2010 IEEE Radio and Wireless Symposium (RWS), LA, USA, 10~14 Jan. 2010.

2009

Bumman Kim, Junghwan Moon, Jangheon Kim, and Jungjoon Kim, “Highly efficient saturated power amplifier with realizable harmonic loading circuits,” invited paper in 12th International Symposium on Microwave and Optical Technology, Dec. 2009.

Jehyung Yoon, Changjoon Park, Heesong Seo, Inyoung Choi, and Bumman Kim, ”A wideband Linear LNA using Dual-Feedback for TV tuner,” IEEE Conference on Microwaves, Communications, Antennas and Electronics Systems, Tel aviv, Isreal, Nov. 9-11, 2009.

Jeong-Cheol Lee, Moonkyung Ahn, Myung-Woon Hwang, Sangwoo Han, and Bumman Kim, “A low-voltage wideband voltage-controlled oscillator for ISDB-T," in Asia-Pacific Microwave Conference (APMC) 2009, Singapore, Dec. 7-10, 2009.

Bumman Kim, Jinsung Choi, Daehyun Kang, and Dongsu Kim, “Optimized Envelope Tracking Operation of Doherty Power Amplifier,” invited paper in 3rd Int. Conf. on Signals, Circuits, and Systems, Nov. 2009.
Bumman Kim, Jinsung Choi, Daehyun Kang, and Dongsu Kim, “Envelope Tracking Technique for Multimode PA Operation,” invited paper in Proc. 39th Eur. Microw. Conf., Oct. 2009.
Daehyun Kang, Jinsung Choi, Myoungsu Jun, Dongsu Kim, Jungmin Park, Boshi Jin, Daekyu Yu, Kyungjun Min, and Bumman Kim, “Broadband class-F power amplifiers for handset applications,” Proc. 39th Eur. Microw. Conf., Rome, Italy, 28 Sep. ~2 Oct., 2009.
Junghwan Moon, Young Yun Woo, Bumman Kim, “A Highly Efficient Doherty Power Amplifier Employing Optimized Carrier Cell,” Proc. 39th Eur. Microw. Conf., Rome, Italy, 28 Sep. ~2 Oct., 2009.
Jangheon Kim, Junghwan Moon, Jungjoon Kim, Slim Boumaiza, and Bumman Kim, “A Novel Design Method of Highly Efficient Saturated Power Amplifier Based on Self-Generated Harmonic Currents,” Proc. 39th Eur. Microw. Conf., Rome, Italy, 28 Sep. ~2 Oct., 2009.
Bumman Kim, Jongchan Kang, Boshi Jin, and Daehyun Kang, "CMOS linear power amplifier," invited talk, 2009 IEEE Radio Frequency Integrated Circuits (RFIC) Symp.., Boston, USA, Jun. 7~9, 2009.
Changjoon Park, Jehyung Yoon, and Bumman Kim, "Non-Decimation FIR Filter for Digital RF Sampling Receiver with Wideband Operation Capability," in IEEE Radio Frequency Integrated Circuits (RFIC) Symp., Boston, MA, USA, Jun. 7~9, 2009.
Jinsung Choi, Dongsu Kim, Daehyun Kang, Myoungsu Jun, Boshi Jin, Jungmin Park, and Bumman Kim, “A 45/46/34% PAE linear polar transmitter for EDGE/WCDMA/Mobile-WiMax,” in IEEE MTT-S Int. Microw. Sympo. Dig., Boston, MA, USA, Jun. 7~12, 2009.
Daehyun Kang, Jinsung Choi, Daekyu Yu, Kyungjun Min, Dongsu Kim, Myoungsu Jun, Jungmin Park, Boshi Jin, and Bumman Kim, “Input power dividing of Doherty power amplifiers for handset applications,” in IEEE MTT-S Int. Microw. Sympo. Dig., Boston, MA, USA, Jun. 7~12, 2009.

Ildu Kim, Jangheon Kim, Junghwan Moon, Jungjoon Kim, YoungYun Woo, and Bumman Kim, "Hybrid EER transmitter using highly efficient saturated power amplifier for 802.16e mobile WiMAX application," in IEEE MTT-S Int. Microwave Symp., Boston, MA, USA, Jun. 7~12, 2009
Bumman Kim and Jinsung Choi, “A new emerging technology of digitally assisted RF circuits,” invited talk in IEEE Mini-Colloquium on Nano-Scale Devices and Circuits, Seoul, Korea, Apr. 2009.

2008

Hee-Ran Ahn, and Bumman Kim, "Modified small asymmetric impedance transformers," in 2008 IEEE MTT-S IMWS on Art of Miniaturizing RF and Microwave Passive Components Proceeding, pp. 71-74, Chengdu, Dec. 14-15, 2008.
Boshi Jin, Jinsung Choi, Daehyun Kang Myoungsu Jun, and Bumman Kim, “Optimized design of wideband transformer for handset CMOS power amplifier application,” in Asia-Pacific Microwave Conference (APMC) 2008, Hongkong, China, Dec. 16-20, 2008.
Hee-Ran Ahn, Jungjoon Kim, and Bumman Kim, “Branch-line hybrids with -15dB coupling power," in Asia-Pacific Microwave Conference (APMC) 2008, Hongkong, China, Dec. 16-20, 2008.

Daehyun Kang, Daekyu Yu, Kyoungjoon Min, Jinsung Choi, Myoungsu Jun, Dongsu Kim, and Bumman Kim, “Class-AB/F Doherty power amplifiers,” Proc. 38^th Eur. Microw. Conf., Amsterdam, Netherlands, Oct. 2008, pp. 230-233.
Jangheon Kim, Junghwan Moon and Bumman Kim, "Highest Efficiency Award at Student High-efficiency Power Amplifier Design Competition,"in IEEE MTT-S Int. Microwave Symp., Atlanta, Georgia, USA, Jun. 15~20, 2008.
Sangsu Jin, Tae-Young Oh, Kuk-Tae Hong, Hong-Teuk Kim, and Bumman Kim, "Wide-band CMOS loop-through amplifier for cable TV tuner," in IEEE Radio Frequency Integrated Circuits (RFIC) Symp., Atlanta, Georgia, USA, Jun. 15~17, 2008.

Ildu Kim, Junghwan Moon, Jangheon Kim, Jungjoon Kim, Cheol soo Seo, Kae-oh Sun, Cheol woo Ahn, and Bumman Kim, "Envelope injection consideration of high power hybrid EER transmitter for IEEE 802.16e mobile WiMAX application," in IEEE MTT-S Int. Microwave Symp., Atlanta, Georgia, USA, Jun. 15~20, 2008.

Bumman Kim, Jinsung Choi, "Delta-Sigma modulator(DSM) based polar transmitter," invited talk, IEEE MTT-S Int. Microwave Symp., Atlanta, Georgia, USA, Jun. 15~20, 2008.

Bumman Kim, Jangheon Kim, Jinsung Choi, and Ildu Kim, "Performance enhancement of linear power amplifier employing digital technique, invited paper in Proc. IEEE Int. Symp. Circuits Systems, Seattle, WA(USA), May 2008.
Bumman Kim, "Power amplifiers for next generation transmitters," invited talk, 2008 International Conferece on Microwave and Millimeter Wave(ICMMT2008), Nanjing, China, Apr. 21-24, 2008.
Bumman Kim, Young Yun Woo, Jangheon Kim, and Daehyun Kang, "Investigation of high-efficiency class-F and inverse class-F power amplifier and their linear operation," invited talk, 2008 IEEE Radio and Wireless Symposium (RWS), Orlando, FL, USA, Jan. 22-24, 2008.

Bumman Kim, Jangheon Kim, and Junghwan Moon, "Microwave Doherty power amplifier for high efficiency and linearity," invited talk, 2008 IEEE Topical Symposium on Power Amplifier for Wireless Communications, Orlando, FL, USA, Jan. 21-22, 2008.

2007

Bumman Kim, Jangheon Kim, Daekyu Yu, and Joongjin Nam, "High efficiency Doherty amplifier with good linearity for mobile handset applications," invited talk, Microwave Workshop and Exhibition, Pacifico Yokohama, Japan, Nov. 2007.
Bumman Kim, "High efficiency linear PA technique for basestations," panel session, 29th IEEE Compound Semiconductor IC (CSIC) Symp., Oregon, USA, Oct. 2007.
Hee-Ran Ahn and Bumman Kim, "Left-handed small impedance transformers and their application to arbitrary phase differentiated lumped baluns for impedance transforming," in Asia-Pacific Microwave Conference 2007, Bangkok, Thailand, Dec. 2007, pp. 789-792.
Bumman Kim, Jinsung Choi, and Ildu Kim, "High efficiency RF transmitter modulating power supply," invited talk, in 8th Int. conf. on Telecommunication in Modern Satelite, Cable and Broadcasting Services (TELSIKS), Nis, Serbia, Sep. 2007.
Ildu Kim, Young Yun Woo, Sungchul Hong, and Bumman Kim, "High efficiency hybrid EER transmitter for WCDMA application using optimized power amplifier," Proc. 37^th Eur. Microw. Conf., Munich, Germany, Oct. 2007, pp. 182-185.
Junghwan Moon, Jangheon Kim, Ildu Kim, Young Yun Woo, Sungchul Hong, Han Seok Kim, Jong Sung Lee, and Bumman Kim, "GaN HEMT based Doherty amplifier for 3.5-GHz WiMAX applications," Proc. 37^th Eur. Microw. Conf., Munich, Germany, Oct. 2007, pp. 395-398.
Jangheon Kim, Bumman Kim, and Young Yun Woo, "Advanced design of linear Doherty amplifier for high efficiency using saturation amplifier," in IEEE MTT-S Int. Microw. Symp. Dig., Jun. 2007, pp. 1573-1576.

Young Yun Woo, Jangheon Kim, Sungchul Hong, Ildu Kim, Junghwan Moon, Jaehyok Yi, and Bumman Kim, "A new adaptive digital predistortion technique employing feedback technique," in IEEE MTT-S Int. Microw. Symp. Dig., Jun. 2007, pp. 1145-1148.

Sungchul Hong, Young Yun Woo, Ildu Kim, Jangheon Kim, Junghwan Moon, Han Seok Kim, Jong Sung Lee, and Bumman Kim, "High efficiency GaN HEMT power amplifier optimized for OFDM EER transmitter," in IEEE MTT-S Int. Microw. Symp. Dig., Jun. 2007, pp. 1247-1250.

Jinsung Choi, Jounghyun Yim, Jinho Yang, Jingook Kim, Jeonghyun Cha, and Bumman Kim, "A Delta-Sigma-Digitized RF transmitter," in IEEE MTT-S Int. Microw. Symp. Dig., Jun. 2007, pp. 81-84.

Hee-Ran Ahn, Sekyeong Lee, Junghwan Moon, and Bumman Kim, "Left-handed transmission lines and left-handed small impedance transformers (LHCCTs)," in international MINT-MIS2007/TSMMW 2007/MilliLab Workshop digest, Seoul, Korea, Feb. 2007, pp. 53 - 56.

Bumman Kim, Joongjin Nam and Daekyu Yu, "Doherty linear power amplifiers for mobile handset applications," invited paper, 2007 IEEE Radio and Wireless Symposium (RWS), Long Beach, California, USA, pp. 301-304, Jan., 9~11, 2007.

2006

Bumman Kim, Joongjin Nam and Daekyu Yu, "Doherty Linear Power Amplifiers for Mobile Handset Applications," invited paper, Asia-Pacific Microwave Conference (APMC) 2006, Yokohama, Japan, pp. 1885-1892, Dec., 2006.
Hee-Ran Ahn, Kyoungjoon Min, Daehyun Kang, Sungchul Hong and Bumman Kim , “Coupling-Compensated 180° Phase Shift Coupled-Line Filters Terminated in Arbitrary Impedances,” in Asia-Pacific Microwave Conference (APMC) 2006, Yokohama, Japan, pp. 649-652, Dec., 2006.
Bumman Kim, "3G & 4G Handset Transmitters," invited paper, The 10th Vietnam Conference on Radio & Electronics, Hanoi, Vietnam, Nov. 6~7, 2006.
Ildu Kim, Jeonghyeon Cha, Sungchul Hong, Young Yun Woo, Jangheon Kim, and Bumman Kim, "Predistortion Power Amplifier for Base-Station using a Feedforward Loop Linearizer," 36^th European Microwave Conference, Manchester, UK, pp. 141-144, Sep., 2006.
Young Yun Woo and Bumman Kim, “ Highest Efficiency Award at Student High-efficiency Power Amplifier Design Competition,” IEEE MTT-S Int. Microwave Symp., San Francisco, USA, , June. 11~16, 2006.
Bumman Kim, Y. Woo, H. Kim, J. Choi, and J. Yang, “ 3G & 4G Handset Transmitter based on Switching Power Amplifiers,” IEEE MTT-S Int. Microwave Symp., San Francisco, USA, WMB: Switching mode amplifiers with applications to wireless tansmitter design pp.115-132, June. 11~16, 2006.

Daekyu Yu, Yong-woong Kim, Kichon Han, Jin-ho Shin, and Bumman Kim, “ Fully Integrated Doherty Power Amplifiers for 5 GHz Wireless-LANs,” IEEE Radio Frequency Integrated Circuits (RFIC) Symp., San Francisco, USA, pp.177-180, June. 11~13, 2006.
O. Hammi, S. Boumaiza, Jangheon Kim, Sungchul Hong, Ildu Kim, Bumman Kim and F. M. Ghannouchi, “RF Power Amplifiers for Emerging Wireless Communications: Single Branch vs. Multi-Branch architectures, "IEEE Canadian Conference on Electrical and Computer Engineering," Ottawa, ON, Canada, pp. 1469 - 1472, May 7~10, 2006.
Jongchan Kang, Ali Hajimiri, Bumman Kim, "A Single-Chip Linear CMOS Power Amplifier for 2.4 GHz WLAN," 2006 IEEE International Solid-State Circuits Conference, San Francisco, CA, pp.208-209, Feb., 2006.
Bumman Kim, Jangheon Kim, and Jeonghyeon Cha, "The Doherty Power Amplifier Technique for Base Station Application," Invited Keynote Speech at 2006 INMMIC, Aveiro, Portugal, Jan. 30, 2006.
Bumman Kim and Jongchan Kang, "Postech activities on CMOS based Linear Power Amplifiers," invited paper in Plarnary session,2006 IEEE Topical Workshop on Power Amplifiers for Wireless Communications, San Diego, California, Jan. 16~17, 2006.

2005

Jinsung Choi, Seonghan Ryu¤, Huijung Kim, and Bumman Kim, "A Low Phase Noise 2 GHz VCO using 0.13 um CMOS process," in Asia-Pacific Microwave Conference (APMC) 2005, Suzhou, China, pp. 2270-2272, Dec., 2005.

Huijung Kim , Seonghan Ryu , Seunghyun Lee, Sanghyeok Choi, Changjoon Park, Sangsu Jin, Jongryul Lee, and Bumman Kim, "A single-chip multi-mode RF front-end circuit and module for W-CDMA, PCS, and GPS applications," 35^th European Microwave Conference, Paris, France, pp. 367 - 370, Oct., 2005.
Jangheon Kim, Jeonghyeon Cha, Ildu Kim, Bumman Kim, Sang Yeon Noh, and Cheon Seok Park, "Advanced Design Methods of Doherty Amplifier for Wide Bandwidth, High Efficiency Base Station Power Amplifiers," 35^th European Microwave Conference, Paris, France, pp. 963 - 966, Oct., 2005.
Joongjin Nam, Jin-Ho Shin, and Bumman Kim, "The Handset Power Amplifier using Continuous Bias Control," International Technical Conference on Circuits/Systems, Computers and Communications, Jeju, Korea, pp. 1265 - 1266, July, 2005.
Jongchan Kang and Bumman Kim, "0.18 um CMOS Power Amplifier with High Efficiency and Linearity," International Technical Conference on Circuits/Systems, Computers and Communications, Jeju, Korea, pp. 1371 - 1372, July, 2005.

Ildu Kim, Jangheon Kim, Jeonghyeon Cha, YoungYun Woo, Sungchul Hong, and Bumman Kim, “The linearity and efficiency improvement of 3-way Doherty amplifier with uneven power drive,” International Technical Conference on Circuits/Systems, Computers and Communications, Jeju, Korea, pp. 369 - 370, July, 2005.
Kyungho Lee, Jehyung Yoon, Jounghyun Yim, Jongchan Kang, Donghyun Baek, Soonhag Lee, Ilhun Shon, and Bumman Kim, "An Improved Silicon RF LDMOSFET Model with a New Extraction Method for Nonlinear Drift Resistance," IEEE Radio Frequency Integrated Circuit Symp., Long Beach, CA (USA), pp. 153 - 156, June, 2005.
Seonghan Ryu, Yujin Chung, Huijung Kim, Jinsung Choi and Bumman Kim, "Phase Noise Optimization of CMOS VCO through Harmonic Tuning," IEEE Radio Frequency Integrated Circuit Symp., Long Beach, CA (USA), pp. 403 - 406, June, 2005.
Jongchan Kang, Kyungho Lee, Jehyung Yoon, Yisun Chung¤, Sungbo Hwang¤ and Bumman Kim, "Differential CMOS Linear Power Amplifier with 2nd Harmonic Termination at Common Source Node," IEEE Radio Frequency Integrated Circuit Symp., Long Beach, CA (USA), pp. 443 - 446, June, 2005.

Seungwoo Kim, Kyungho Lee, Peter J. Zampardi, and Bumman Kim, "CDMA Handset Power Amplifier with Diode Load Modulator," IEEE MTT-S Int. Microwave Symp., Long Beach, CA (USA), pp. 653 - 656, June, 2005.
Kwangsik Choi, Daekyu Yu, Kyungho Lee, and Bumman Kim, "fmax Enhancement of HBTs Using New Self-alinged Emitter-Base Matallization Technique," Topical Symposium on Millimeter Waves(TSMMW), Seoul, Korea, pp. 303 - 306, Feb., 2005.

2004

Bumman Kim, Jeonghyeon Cha, Bumjae Shin, Jangheon Kim, and Ildu Kim, "High Power Microwave Doherty Amplifier for Linearity and Efficiency Enhancements," invited talk , in Asia-Pacific Microwave Conference(APMC 2004), Deli, India, 15-18 Dec., 2004.
Daekyu Yu, Kwangsik Choi, Kyungho Lee, Bumman Kim, D. Ontiveros, K. Vargason, J.M. Kuo, and Y.C. Kao, "Ultra High_Speed 0.25-μm Emitter InP-InGaAs SHBTs with fmax of 687 GHz,” IEEE International Electron Devices Meeting (IEDM), San Francisco, USA, pp. 557-560, December, 2004.
Sangsu Jin, Seonghan Ryu, Huijung Kim, Jong-Ryul Lee, and Bumman Kim, "Development of Linear Channel-Selection Filter for Direct Conversion Receivers," LG Best Paper Award, International SoC Design Conference, Seoul, Korea, pp. 83- 86, 25-26 October, 2004 .
Changjoon Park, Huijung Kim, Jong-Ryul Lee, and Bumman Kim, "Dual mode Low Noise Amplifier for WCDMA Applications," International SoC Design Conference, Seoul, Korea, pp. 184- 187, 25-26 October, 2004 .
Joongjin Nam, Youngwoong Kim, Jin-Ho Shin, and Bumman Kim, "A CDMA and AMPS Handset Power Amplifier based on Load Modulation Technique," 34th European Microwave Conf. digest, Amsterdam, Netherlands, 12th GAAS2004, pp. 523- 526, Oct., 2004.

Daekyu Yu, Kwangsik Choi, Kyungho Lee, Bumman Kim, D. Ontiveros, K. Vargason, J.M. Kuo, and Y.C. Kao, "Realization of High-Speed InP SHBTs using Novel but Simple Techniques for Parasitic Reduction,” 16^thInternational Conference on Indium Phosphide and Related Materials, Kagoshima, pp. 753-756, June, 2004.

Bumman Kim, "Microwave Doherty Amplifier for High Linearity and Efficiency", invited talk , IEEE MTT-S Int. Microwave Symp. Workshop, Fort Worth,Texas, June, 2004.
Seungwoo Kim, Jongwoo Lee, Jinho Shin, and Bumman Kim, "CDMA Handset Power Amplifier with a Switched Output Matching Circuit for Low/High Power Mode Operations," IEEE MTT-S Int. Microwave Symp., Fort Worth,Texas, pp. 1523 - 1526, 6-11 June, 2004.

Jeonghyeon Cha, Jangheon Kim, Bumman Kim, Jong Sung Lee, and Sang Hoon Kim, "Highly Efficient Power Amplifier for CDMA Base Stations Using Doherty Configuration," IEEE MTT-S Int. Microwave Symp., Fort Worth,Texas, pp. 533 - 536, 6-11 June, 2004.
Bumjae Shin, Jeonghyeon Cha, Jangheon Kim, Y.Y. Woo, Jaehyok Yi, and Bumman Kim, "Linear Power Amplifier based on 3-Way Doherty Amplifier with Predistorter," IEEE MTT-S Int. Microwave Symp., Fort Worth,Texas, pp. 2027 - 2030, 6-11 June, 2004.

Bumman Kim, Kyungho Lee, Daekyu Yu, "Current Status of Millimeter-Wave Transistor Technology," plenary talk , Topical Symposium on Millimeter Waves(TSMMW), Yokosuka, Japan, Feb., 2004.

2003

Sanghoon Kang and Bumman Kim, "Second Order Nonlinearity Analysis of Gilbert Mixer," IEEE Radio Frequency Integrated Circuit Symp., Philadelphia, pp. 559 – 562, 8-10 June, 2003.

Young Yun Woo, Jaehyok Yi, Youngoo Yang, and Bumman Kim, "SDR Transmitter Based on LINC Amplifier with Bias Control," IEEE MTT-S Int. Microwave Symp., Philadelphia, Vol. 3, pp. 1703 - 1706, 8-13 June, 2003.
Jeonghyeon Cha, Youngoo Yang, Bumjae Shin, and Bumman Kim, "An Adaptive Bias Controlled Power Amplifier with a Load-Modulated Combining Scheme for High Efficiency and Linearity," IEEE MTT-S Int. Microwave Symp., Philadelphia, Vol. 1, pp. 81 - 84, 8-13 June, 2003.
Bumman Kim, Youngoo Yang, Jaehyok Yi, Young Yun Woo, and Jeonghyeon Cha, "Optimum Design of Microwave Doherty Amplifier for Linearity and Efficiency," invited paper, PIERS, Singapore, Jan., 2003.

2002

Jongchan Kang, Youngoo Yang, Sungwoo Kim, and Bumman Kim "A Heterojunction Bipolar Transistor Large-signal Model Focused on the Saturation Region," 32th Euroupean Microwave Conference Dig., Milan, Italy, Vol. 3, pp. 147-150, Sep., 2002.
Seonghan Ryu, Huijung Kim, Joonyoul Lim, Jounghyun Yim, Woosung Kwon, and Bumman Kim, Kyounghoon Im, Youngwoong Kim, Seogtae Han, "Monolithic Ka-band VCO with wide tuning range," 32th European Microwave Conference Dig., Milan, Italy. pp. 845-847, Sep., 2002.
Bumman Kim, Young Yun Woo, Jaehyok Yi, Joongjin Nam, and Jeonghyeon Cha, “A New Adaptive Feedforward Amplifier Using Imperfect Signal Cancellation,” 3rd International Conference on Microwave and Millimeter Wave Technology (ICMMT2002), Beijing, China, Aug., 2002.
Y. Yang, Y.Y. Woo, J. Cha, J. Yi, and B. Kim, "New Linearization Method for the Modulated Signals with High Peak-to-Average Ratio: Peak-to-Average Ratio Reduction and Expansion," IEEE MTT-S Int. Microwave Sympo., Seattle, Vol. 2 , pp.777 -780, June, 2002.
Y. Y. Woo, Y. Yang, J. Yi, J. Nam, J. Cha, and B. Kim, "Feedforward Amplifier for WCDMA Base Stations with a New Adaptive Control Method," IEEE MTT-S Int. Microwave Sympo., Seattle, Vol. 2 , pp.769 -772, June, 2002.
Sanghoon Kang, Byounggi Choi and Bumman Kim, "Linearity Analysis of CMOS for RF Application," IEEE Radio Frequency Integrated Circuit Symp., Seattle, pp. 363-366, June, 2002.
Sungmin Ock, Kichon Han, Jong-Ryul Lee and Bumman Kim, "A modified cascode type low noise amplifier using dual common source transistors," IEEE MTT-S Int. Microwave Sympo., Seattle, Vol. 3 , pp.1423 -1426, June, 2002.
Ali Darwish, Amin Ezzeddine, Ho C. Huang, K. Bumman, L. Joonyoul, Y. Sungwhan, M. Mah and J. Cook, "Vertical balun and Wilkinson divider," IEEE MTT-S Int. Microwave Sympo., Seattle, Vol. 1 , pp.109 -112, June, 2002.

2001

Youngsik Kim, JiYoun Kim, Sungwoo Kim, and Bumman Kim, "A Novel Method for the Higher Order Components Extraction of the Channel Current in GaAs MESFET," 31th European Microwave Conf. digest, ExCel Conferance Centre, London, GAAS 2001, pp307-310, Sep. 2001.
Woonyun Kim, Sanghoon Kang, Kyungho Lee, Minchul Chung, and Bumman Kim, " Nonlinear Behavior of Power HBTs, " 31th European Microwave Conf. digest, ExCel Conferance Centre, London, , GAAS 2001, pp. 41 - 44, Sep. 2001.
B. Kim, Y. Yang, J. Cha, Y.Y. Woo and J. Yi, " Measurement of Memory Effect of High-Power Si LDMOSFET Amplifier Using Two-tone Phase Evaluation," invited paper , 58th IEEE ARFTG Conf., 2001.
B. Kim, W. Kim, K. Lee, and S. Kang, " Assessment of Nonlinear Behavior of Power HBT," invited paper ,IEEE Topical Workshop on Power Amplifier for Wireless Communication, Sep. 2001.
B. Kim, Y.Yang, J. Yi, J. Nam, Y. Y. Woo, and J. Cha, "Efficiency Enhancement of Linear Power Amplifier Using load Modulation Technique," invited paper , ISMOT' 2001, Motreal, Canada, pp 505-508, June 2001.

　 2000

Y. Yang, Y. Kim, J. Yi, J. Nam, B. Kim, W. Kang, and S. Kim, “Digital Controlled Adaptive Feedforward Amplifier for IMT-2000 Band ,” IEEE MTT-S Int. Microwave Sympo., Boston Mass., pp.1487 - 1490, June 2000.
J. Yi, Y. Yang, M. Park, W. Kang and B. Kim, “Analog Predistortion Linearizer for High Power RF Amplifiers ,” IEEE MTT-S Int. Microwave Sympo., Boston Mass., pp.1511-1514, June 2000.

Y. Suh, E. Seok, J.-H. Shin, B. Kim, et.al, "Direct Extraction Method for Internal Equivalent Circuit Parameters of HBT Small-signal Hybrid-p Model," IEEE MTT-S Int. Microwave Sympo., Boston Mass., pp.1401 - 1404, June 2000.
B. J. Kim, et al, " Epitaxial Ba0.5Sr0.5TiO3 Thin Films for Microwave Phase Shifters," ISIF 2000, Arhen. Germany
Y. Yang, J. Yi, B. Kim, Y. Kim, and M. Park, “Measurement and Modeling of Two Tone Transfer Characteristics of High Power Amplifier ,” 30^th European Microwave Conf. digest, pp. 55 - 58, Oct. 2000.
S. Ock, Y. Yang, K. Yang and B. Kim, “New Linearization of Mixer Using Harmonic Feed-forwarding Technique,” 30^th European Microwave Conf. digest, Oct. 2000.
Youngoo Yang, Youngyun Woo, and Bumman Kim, "A New Predistortion Using Double Bananced Diode Mixer by Mixing Fundamental with 2nd and 4th Order Im terms," 2000 Korean-Japane Microwave Workshop proceedings, Seoul Korea, 2000.9.6.
Youngoo Yang, Youngyun Woo, and Bumman Kim, " A New Predistortion Linearlizer Using Low Frequency Even Order IM Components," 2000 2nd International Conference on Microwave and Millimeterwave Technology Proceedings, Beijing, China, pp. 416 - 419, Sep. 14 - 16, 2000.
Woonyun Kim, Sanghoon Kang, Kyungho Lee, Minchul Chung, Youngoo Yang and Bumman Kim, "A Physical Model of the Cbc for the Linearity Characteristic of AlGaAs/GaAs HBTs ," ICSMM-2000 proceedings, Kyongju, Korea, pp. 128 - 129, Sep.2000.

Woonyun Kim, Minchul Chung, Kyungho Lee, Youngoo Yang, Sanghoon Kang and Bumman Kim, “The Effects of Nonlinear Cbc On The Linearity Of HBT ,” Asia-Pacific Microwave Conference proceedings, Sydney, Australia, pp. 875 - 879, dec. 2000.
B. J. Kim, S. Baik, Y. Poplavko, Y. Prokopenko, J. Y. Lim, and B. M. Kim, " Epitaxial BaxSr1-Xtio3 Thin Films for Microwave Phase Shifters," Asia-Pacific Microwave Conference proceedings, Sydney, Australia, pp. 934-937, dec. 2000.
Ali Darwish, Amin Exxeddine, Ho C. Huang, Misoon Mah, Jim Cook, Kim Bumman, Joonyoul Lim, Sunghan Yu, "Three Dimensional Transmission Lines and Special Elements Design," Asia-Pacific Microwave Conference proceedings, Sydney, Australia, pp. 225 - 228, dec. 2000.

1999

Bumman Kim, "Heterojunction Bipolar Transistors for RFIC application," The first NRCT-KOSEF Joint Seminar on Semiconductors, Bangkok, Thailand, 1999.11.30-12.1, Proceedings pp.98-104

Bumman Kim, "HBT application for mobile communications," Invited Talk, 22nd Electrical Engineering Conference, Bangkok Thailand, 1999.12.2-12.3

1998

Y. Kim, Y. Yang, S.H. Kang and B. Kim, "Linearization of 1.85GHz Amplifier Using Feedback Predistortion Loop ," IEEE MTT-S Digest, Baltimore Maryland, pp.1675-1678, 1998
M. Kim and B. Kim, "Extraction of Noise Reduction from the Hawkins Model for Heterojunction Bipolar Transistor," Asia-Pacific Microwave Conference proceedings, 1998

1997

S.H. Lee, Y. Kim, T. Roh, B. Kim and I. Brassard, "Linearization of CDMA Power Amplifier by Harmonics Techniques," Wireless R&D Symposium Digest, Feb. 1997
Tae Moon Roh, Youngsik Kim, Youngsuk Suh and Bumman Kim, " A new simple extraction method for higher order components of channel current in GaAs MESFET ," European microwaves, Israel, 1997, pp. 415-417
J.H. Shin, J. Kim, Y. Chung, J. Lee, K.H. Ahn, and B. Kim, "Low Frequency Noise Characteristics of Self-Aligned AlGaAs/GaAs HBT's with a Noise Corner Frequency below 3kHz," 1997 IEEE MTT-S Digest pp.133-136, Denver Colorado
Y.S. Suh, T.M. Roh, Y. Kim, J. Shin, and B. Kim, "A Novwl Extraction Method for Temperature Dependent Large Signal Equivalent Circuit Model of HBT," 27th European Microwave Conference, Jerusalem, Israel, Sept. 1997. pp.97-103
K. Park, K. Han, and B. Kim, "Fabrication of Phase Shifter using Multilayer Process," 5th ICVC, pp.513-515, Oct. 1997
B. Ihn, M.S. Kim, W.N. Kim, J.G. Lee, K.S. Park, M.C. Jung, T.G. Oh, B.K. Kang and B. Kim, "Design and Fabrication of X-band AlGaAs/GaAs Power HBT's," 1997 Asia Pacific Microwave Conference Proceedings, pp.1113-116, Hong Kong, PRC

1996

J. H. Shin, Y. Chung, Y Suh, and B. Kim, "Extraction of Low Frequency Noise of Self Aligned AlGaAs/GaAs Heterojunction Bipolar Transistor," 1996 IEEE MTT Symposium, Digest. pp. 1309-1312.
J. Lee, W. Kim, Y. Kim., T. Roh, and B. Kim, "Design Study of Linearized AlGaAs/GaAs HBTs Using Volterra Series," IEEE MTT-S Digest, San Francisco, CA, USA, 1996, pp. l775-l778

1995

J. O. Kim, M. S. Kim, K. I. Lee, and B. M. Kim, "Extraction of Lateral Device Parameters and Double-Diffused ChanneI Doping Profiles of VDMOST and VIGBT C-V Measurement." The 4th Intertional Conference on VLSI and CAD , Seoul Korea Oct. l5-l8, 1995, pp. 225-228
J. W. Lee, Y. S. Suh, J. H. Shin, B. M. Kim, Y. L. Jung, H. C. Suh, W. Jung, and D S. Ma, "Experimental Study of Emitter Size Effects of Microwave AlGaAs/GaAs HBTs," The 4th International Conference on VLSI and CAD, Seoul, Korea, Oct. l5-l8, 1995, pp. 36l-363
J. W. Lee, M. K. Kong, S. G. Cho, and B. M. Kim, "GaAs/InGaAs Heterostructure FETs with l.6W Output Power at l GHz," IEEE MTT-S Digest, 1995, pp. 453-456
B.U. Ihn, J. Lee, Y. Suh, B. Kim, H.C. Seo, W. Jung and D.S. Ma, " Thermal Analysis of AlGaAs/GaAs Heterojunction Bipolar Transistors Including Base Recombination Current Effect," 22nd Internatinal Symposium Compound Semiconductors., Digest pp. 673-678, Aug. 1995
Jin Ho Shin, Joonwoo Lee, Young-Seok Suh, and Bumman Kim, "1/f Noise Characteristic of AlGaAs/GaAs Heterojunction Bipolar Transistor with a Noise Corner Frequency Below l kHz," ISCS, 1995
T. M. Roh, Y. S. Suh, B. M. Kim, W. S. Park, J. B. Lee, J. W. Kim, Y. S. Kim, and G. Y. Lee, "Linearity characteristics of the low-high doped MESFET for CDMA cellular phone," Asia Pacific Microwave Conference, pp. 117-119, 1995

1994

J. H. Shin, J. Lee, Y Shu. Y Kim, and B. Kim, "Experimental Investigation of Low Frequency Noise Properties of AlGaAs/GaAs and GaInP/GaAs Heterojunction Bipolar Transistors," 21st International Symposium on Compound Semiconductors, San Diego, California, Sept. l994, pp. 625-628

1993

Joonwoo Lee, Bumman Kim, Sungsoo Park, and Youngsik Kim, "A Comparative Study of Kirk Effect on GaAs and Si Bipolar Junction Transistors," Proceedings of ICVC'93, Taejon, Korea, pp. 408-411

1991

B. Kim, "Heterojunction Power FET," Invited talk, International Conference on VLSI&CAD, Oct. 1991
J.E. Lee and B. Kim,"Characteristics of PIN diode using doping superlattice," ICVC, 1991
"Heterojunction Power FET," Invited paper, International Conf. on VLSI & CAD, Oct. 1991

1989

B. Kim, Panel Discussion on High Power Microwave Sources, IEDM, San Francisco, Calif, 1989.

1988

B. Kim, R.J. Mathi, M. Wurtele, K. Bradshaw, and H.Q. Tserng, "Millimeter-wave AlGaAs/InGaAs/GaAs Quantum Well Power MISFET," 1988 IEDM, pp.168-171

1987

H.D. Shih and B. Kim, "Preparation of High-Quality MESFETs by Gas Source MBE," Electronic Materials Conference, Santa Barbara, Ca, June 24-26, 1987

1986

B. Kim, "GaAs/GaAlAs MISFET Technology," 1986 DARPO annual EHF meeting , San Diego Calif. Feb. 19-20, 1986
M.A. Smith, A.M. Pavio, and B. Kim, "A Ka-Band Dual-Channel Tracking Receive Converter," 1986 IEEE MTT-S International Microwave Symposium Digest, paper Y-2, pp.643-944, June 2-4, Baltimore Maryland
B. Kim, et al, "Millimeter-Wave Monolithic GaAs Power FET Amplifiers," 1986 GaAs IC Symposium Grenelefe, Florida, Technical Digest pp.61-63
B. Kim, P. Saunier, and H.D. Shih, "High Performance Ka-Band GaAs Power Field-Effect Transistors," 1986 GOMAC San Diego California, Digest of Papers pp.377-378

1985

P. Saunier, H.Q. Tserng, B. Kim, and G.H. Westphal, "Monolithic GaAs Dual-Gate FET Variable Power Amplifier Module," IEEE 1985, Microwave and Millimeter-Wave Monolithic Circuits Symposium, St. Louis, Mo. pp.1-3
B. Kim, H.Q. Tserng, and H.D. Shih, "High Power Distributed Amplifier Using MBE Synthesized Material," IEEE 1985, Microwave and Millimeter-Wave Monolithic Circuits Symposium, St. Louis, Mo. pp.35-37
B. Kim, H.Q. Tserng, and H.D. Shih, "Millimeter-Wave GaAs FET's with fmax of over 110 GHz," 1985 IEEE/Cornell Conference, Cornell Univ. July 29-31, 1985
H.Q. Tserng and B. Kim, "A 115 GHz Monolithic GaAs FET Oscillator ," 1985 IEEE GaAs IC Sumposium, Monterey Calif., Nov. 12-14, 1985, pp.11-13
B. Kim, Panel Discussion on Millimeter-wave Technology, 1985 IEEE GaAs IC Symposium, Monterey Calif. Nov. 12-14, 1985

1983

B. Kim, H.Q. Tserng and P. Saunier, "A GaAs Dual-Gate Power FET Operation up to K Band," Tech. Digest, 1983 ISSCC pp.200-201

1980

C.S. Tsai, C.C. Lee, and B. Kim, "A Review of Recent Progress on Guided-Wave Acoustooptics with Applications to Wideband Communications and Signal Processing," Tech. Digest Topical Meeting on Integrated and Guided-wave Optics, Incline Village Nevada, Jan. 28-30, 1980

1978

C.S. Tsai, B. Kim, and F. Akkari, "Optical Channel Waveguide Switch and Coupler Using Total Internal Reflection," Tech. Digest, 1978 Topical Meeting on Integrated and Guided-wave Optics, Salt Lake City, Utah Jan. 16-18

1977

C.S. Tsai, I.W. Yao, B. Kim, and Le T. Nguyen, "Wide band Guided-Wave Anisotropic Bragg Diffraction in LiNbO3 Waveguide," Technical Digest, 1977 International Conference on Integrated Optics and Optical Fiber Communication, Tokyo, Japan, July 18-29, pp.12-14
B. Kim and C.S. Tsai, "Thin-Film Tunable Optical Filtering using Anisotropic and Noncollinear Acoustooptic Integration in LiNbO3 Waveguideds," Symp. Digest, 1977 Ultrasonic Symp. Phoenix, Az., Oct. 26-28, pp.118
C. S. Tsai, Le T. Nguyen, B. Kim, and I. W. Yao, "Guided-Wave Acoustooptic Signal Processors for Wideband Radar System," INVITED REVIEW PAPER, Symposium on Integrated-Optics, Huntsville, Alabama, Sept. 27-29, 1977

1976

C.S. Tsai, B. Kim, P. Saunier and Le T. Nguyen, "Acoustooptic Bragg Diffraction using Multiple Surface Acoustic waves and Electrooptic Deflection/Modulation using tilted Electrodes," Tech. Digest, 1976 Topical Meeting on Integrated Optics, Salt Lake City, Utah, Jan. 12-14

1975

C.S. Tsai, M.A. Alhaider, Le T. Nguyen, and B. Kim, "Wide-band guided-wave acousto-optic Bragg devices using multiple tilted surface acoustic waves," Digest of Technical paper 1975, Ultrasonics Symposium.
C.S.Tsai, Le T.Nguyen, and B.Kim, "Wideband guided wave array in LiNbO3 wave-guide," Dig. Tech. Paper, 1975, Ultrasonics Symp. Los Angeles, Calif., pp.42-43, Sept. 22-24

2011

이주연, 손정환, 문정환, 김정준, 지승훈, 김승찬, 김범만, "Highly Efficient ET transmitter for 20MHz Bandwidth Signals" 2011 춘계 마이크로파 및 전파전파 학술대회 논문집, May, 2011, vol. 34, no. 1, pp. 115.
김석현, 문정환, 김정준, 손정환, 지승훈, 김승찬, 이주연, 김범만, "Highly efficient Doherty amplifier employing GaN and LDMOSFET cells for base station application" 2011 춘계 마이크로파 및 전파전파 학술대회 논문집, May, 2011, vol. 34, no. 1, pp. 119.
문정환, 조윤성, 김주승, 김범만, "Digital Predistortion Technique of Handset Power Amplifier" 2011 춘계 마이크로파 및 전파전파 학술대회 논문집, May, 2011, vol. 34. no. 1, pp. 125.
Bumman Kim, "Digitally Enhanced Power Amplifier and Transmitter," invited talk, 디지털 RF 및 안테나 임베디드 라디오 시스템 워크샵, May. 2011

2010

Daehyun Kang, Dongsu Kim and Bumman Kim, "Envelope Tracking Operation of Linear Power Amplifier for Handset Application," invited talk, in 10th RF Integrated Circuit Tech. Workshop, Jeju, Korea, Sep. 2010.
Bumman Kim, Junghwan Moon, Jungjoon Kim, Junghwan Son and Seunghoon Jee, "Digitally Enhanced Linear Power Amplifier with High Performance," invited talk, 2010 RF 전력증폭기 Workshop, Aug. 2010.

최인영, 이정철, 윤제형, 서희송, 김범만, “A 0.13-μm CMOS Multi-Divider for 100 MHz ~ 1 GHz Frequency Synthesizer,” 대한전자공학회 2010 하계종합학술대회, Jun. 18, 2010.
정태영, 윤제형, 서희송, 최인영, 김범만, “노이즈 캔슬링 기법을 이용한 단일 입력 차동 출력 구조의 광대역 저잡음 증폭기,” 대한전자공학회 2010 하계종합학술대회, Jun. 18, 2010.

김정준, 문정환, 손정환, 지승훈, 김범만, "Direct input power dividing method of Doherty power amplifier for bas station applications" 2010 춘계 마이크로파 및 전파전파 학술대회 논문집, Jun, 2010, vol. 33, no. 1, pp. 22.
문정환, 김정준, 손정환, 지승훈, 김범만, "A highly Efficient Doherty Amplifier Considering Knee Voltage Effect" 2010 춘계 마이크로파 및 전파전파 학술대회 논문집, Jun, 2010, vol. 33, no. 1, pp. 97.
손정환, 김정준, 지승훈, 문정환, 김범만, "Highly Efficient Envelope Tracking Transmitter for Base Station" 2010 춘계 마이크로파 및 전파전파 학술대회 논문집, Jun, 2010, vol. 33, no. 1, pp. 103.
지승훈, 문정환, 김정준, 김범만, "Saturated Doherty Power Amplifier for 3.5Ghz WiMAX Applications" 2010 춘계 마이크로파 및 전파전파 학술대회 논문집, Jun, 2010, vol. 33, no. 1, pp. 104.

2009

Changjoon Park, Heesong Seo and Bumman Kim, "A noise optimized FIR filter for digital RF receiver," in 9th RF Integrated Circuit Tech. Workshop, Jeju, Korea, Sep. 2009.
Dongsu Kim, Jinsung Choi, Daehyun Kang and Bumman Kim, “A wideband CMOS hybrid switching supply modulator for polar transmitter,” best paper awards in 9th RF Integrated Circuit Tech. Workshop, Jeju, Korea, Sep. 2009.
Jungmin Park, Jinsung Choi and Bumman Kim, “A 2.6GHz CMOS up-conversion mixer with Gm linearization technique,” in 9th RF Integrated Circuit Tech. Workshop, Jeju, Korea, Sep. 2009.

Bumman Kim, Jinsung Choi, Daehyun Kang and Dongsu Kim, "Multi-mode power amplifier based on the mode-dependent power supply modulator," invited talk, in 9^th RF Integrated Circuit Tech. Workshop, Jeju, Korea, Sep. 2009.
최인영, 윤제형, 박창준, 서희송, 김범만, "A 0.18-um CMOS switch with high isolation for 48 MHz ~ 860 MHz TV tuner application," 대한전자공학회 2009 하계종합학술대회, Jul. 8, 2009.

문정환, 김장헌, 김범만, "A Novel Digital Feedback Predistortion Technique with Memory" 2009 춘계 마이크로파 및 전파전파 학술대회 논문집, May 2009, vol. 32, no. 1, pp. 5

김일두, 지승훈, 문정환, 손정환, 김정준, 김범만, "Asymmetric Saturated 3-Stage Doherty Power Amplifier For Improved Efficiency" 2009 춘계 마이크로파 및 전파전파 학술대회 논문집, May 2009, vol. 32, no. 1, pp. 95.
김정준, 손정환, 문정환, 김일두, 지승훈, 김범만, "Highly efficient saturated power amplifier using GaN HEMT" 2009 춘계 마이크로파 및 전파전파 학술대회 논문집, May 2009, vol. 32, no. 1, pp. 94.

손정환, 김정준, 김장헌, 김일두, 문정환, 지승훈, 김범만, "Highly Efficient Doherty Power Amplifier Using Saturated PA Cells" 2009 춘계 마이크로파 및 전파전파 학술대회 논문집, May 2009, vol. 32, no. 1, pp. 6.

최진성, 김동수, 강대현, 전명수, 김박식, 박정민, 김범만, "0.13um CMOS 공정을 이용한 다표준 폴라 송신기를 위한 PA 레귤레이터," in 16th Korean Conference on Semiconductors, Daejun, Korea, Feb. 2009.

Jinsung Choi, "A linear polar transmitter with CMOS programmable hysteretic-controlled supply modulator for multi-standard applications," Bronze Prize Winner in 15^th Samsung Human-Tech Thesis Prize, Feb. 2009.

2008

Hee-Ran Ahn, Jungjoon Kim, and Bumman Kim, "Impedance-transforming small impedance transformers," Winter KIEES Conference Digest, vol. 18, no. 1, pp. 49, 28th, Nov. 2008.
Hee-Ran Ahn, Jungjoon Kim, and Bumman Kim, "Small impedance transforming baluns with perfect matching and perfect isolation," Fall KIEES Conference Digest, 25th, pp. 109, Sep. 2008.
Heesong Seo, Changjoon Park, Jehyung Yoon, Inyoung Choi and Bumman Kim, "Distributed low noise amplifier using reactive termination," 8th RF Integrated Circuit Technology Wokrshop, Sep. 4, 2008.
Hee-Ran Ahn, Jungjoon Kim, and Bumman Kim, "Branch-line hybirds with -15 dB coupling power," Summer KIEES Conference Digest, 27th, pp. 51-54, Jun. 2008.
Boshi Jin, Jinsung Choi, Daehyun Kang, Dongsu Kim, Myoungsu Jun, Jungmin Park and Bumman Kim, "An dual band transformer for CMOS power amplifier application," 2008 춘계 마이크로파 및 전파전파 학술대회 논문집, May 2008, vol. 31, no. 1, pp. 463-466.

Hee-Ran Ahn, Jungjoon Kim and Bumman Kim, "Compact and wideband ring hybrids with coupled transmission lines," invited paper, Spring IEEE MTT/AP/EMC Korea Chapter KIEES Conference Digest. vol. 31, no. 1, pp. 317-320.

Ildu Kim, Junghwan Moon, Jangheon Kim, Jungjoon Kim and Bumman Kim, "Highly efficient high power hybrid EER transmitter for IEEE 802.16e mobile WiMAX application," 2008 춘계 마이크로파 및 전파전파 학술대회 논문집, May 2008, vol. 31, no. 1, pp. 303-306.

Jungjoon Kim, Ildu Kim, Jangheon Kim, Junghwan Moon and Bumman Kim, "Optimum PA design for hybrid-EER transmitter using smart varactor control circuit," 2008 춘계 마이크로파 및 전파전파 학술대회 논문집, May 2008, vol. 31, no. 1, pp. 283-286.

Junghwan Moon, Jangheon Kim, Ildu Kim, Jungjoon Kim and Bumman Kim, "Gate-bias control technique for envelope tracking Doherty amplifier," 2008 춘계 마이크로파 및 전파전파 학술대회 논문집, May 2008, vol. 31, no. 1, pp. 73-76.
Jangheon Kim, Junghwan Moon, Ildu Kim, Jungjoon Kim, Junghwan Son and Bumman Kim, "On the accurate predistorted signal extraction capability of digital feedback predistortion technique," 2008 춘계 마이크로파 및 전파전파 학술대회 논문집, May 2008, vol. 31, no. 1, pp. 69-72.

2007

Changjoon Park, Jehyeong Yoon, Hyejeong Song, Sekyeong Lee, Heesong Seo, and Bumman Kim, "A charge-domain passive mixer in 0.13-um CMOS," 2007 추계 마이크로파 및 전파전파 학술대회 논문집, Sep. 2007, vol. 30, no. 2, pp. 475-478.

Hyejeong Song, Huijung Kim, Changjoon Park, Jehyeong Yoon, Sekyeong Lee, Heesong Seo, and Bumman Kim, "A study on the 0.18-um CMOS dual-band low-noise amplifier for CDMA/WLAN," 2007 추계 마이크로파 및 전파전파 학술대회 논문집, Sep. 2007, vol. 30, no. 2, pp. 463-466.
Jehyeong Yoon, Changjoon Park, Sekyeong Lee, Hyejeong Song, Heesong Seo, and Bumman Kim, "Noise improvement of active Gilert mixer with reduction current circuit," 7th RF Integrated Circuit Technology Workshop, Sep. 13, 2007.
Bumman Kim, Jangheon Kim, Ildu Kim, and Jinsung Choi, "Recent works on power amplifiers and transmitters," invited talk, in 2007 RF Power Amplifier Workshop, Seoul, Korea, Aug. 2007, vol. 1, pp. 5-35.
Bumman Kim and Jinsung Choi, "Delta-sigma based polar transmitter," invited talk, in 7^th RF Integrated Circuit Tech. Workshop, Jeju, Korea, Sep. 2007.
Jangheon Kim, Changjoon Park, Junghwan Moon, Ildu Kim, Jungjoon Kim, Young Yun Woo, and Bumman Kim, "A study on adaptive digital feedback predistortion technique combined with digital feedback technique," 2007 추계 마이크로파 및 전파전파 학술대회 논문집, Sep. 2007, vol. 30, no. 2, pp. 445-448.
Hee-Ran Ahn, Junghwan Moon, and Bumman Kim, "Realization of high impedance transmission lines using a pair of coupled-transmission lines with two shorts," 2007 추계 마이크로파 및 전파전파 학술대회 논문집, Sep. 2007, vol. 30, no. 2, pp. 523-526.
Jangheon Kim, Ildu Kim, Junghwan Moon, Jungjoon Kim, Myoungsu Jun, Young Yun Woo, Sungchul Hong, and Bumman Kim, "A study on digital feedback predistortion technique for highly efficient power amplifier," 2007 춘계 마이크로파 및 전파전파 학술대회 논문집, May 2007, vol. 30, no. 1, pp. 23-26.
Junghwan Moon, Jangheon Kim, Ildu Kim, Jungjoon Kim, Myoungsu Jun, and Bumman Kim, "A study on high performance Dohertyy power amplifier for WiMAX system using GaN HEMT," 2007 춘계 마이크로파 및 전파전파 학술대회 논문집, May 2007, vol. 30, no. 1, pp. 317-320.
Jungjoon Kim, Junghwan Moon, Jangheon Kim, Ildu Kim, Myoungsu Jun, and Bumman Kim, "Developement of a 2.14-GHz high efficiency class-F power amplifier," 2007 춘계 마이크로파 및 전파전파 학술대회 논문집, May 2007, vol. 30, no. 1, pp. 321-324.
Ildu Kim, Young Yun Woo, Sungchul Hong, Jangheon Kim, Junghwan Moon, Myoungsu Jun, Jungjoon Kim, and Bumman Kim, "Advanced Hybrid EER transmitter for WCDMA application using efficiency optimized power amplifier and modified bias modulator," 2007 춘계 마이크로파 및 전파전파 학술대회 논문집, May 2007, vol. 30, no. 1, pp. 333-336.
Hee-Ran Ahn, and Bumman Kim, "Coupling-compensated DC blocks terminated in arbitrary," 2007 춘계 마이크로파 및 전파전파 학술대회 논문집, May 2007, vol. 30, no. 1, pp. 381-384.

2006

Hee-Ran Ahn and Bumman Kim, "Ring filter switch," in IEEE MTT/AP/EMC Korea Chapter KEES. Digest (종합 학술 발표회), Nov. 3 2006, vol. 16, no. 1, pp. 131-134.
Bumman Kim, " CMOS Linear Power Amplifier," invited paper ,6th RF Integrated Circuit Technology Workshop, Sep., 22, 2006.
Hee-Ran Ahn, Joongjin Nam, and Bumman Kim, "Coupling compensated 180° phase shift coupled line filters terminated in arbitrary impedances," 2006 추계 마이크로파 및 전파 학술대회 논문집, Sep. 15 2006, vol. 29, no. 2, pp 263-266.
Junghwan Moon, Sungchul Hong, Jangheon Kim, Jeonghyeon Cha, YoungYun Woo, Ildu Kim, and Bumman Kim, "Base Station Power Amplifier with Minimized Memory Effect," 2006 추계 마이크로파 및 전파 학술대회 논문집, Vol. 29, No. 2, pp 237-240, Sep., 2006.
Jinho Yang, Huijung Kim, Changjoon Park, Jinsung Choi, Jehyung Yoon, and Bumman Kim, "Improving the Linearity of CMOS Low Noise Amplifier Using Multiple Gated Transistors," 2006년도 대한전자공학회 하계종합학술대회, Vol. 29, No. 1, pp. 505-506, June. 21~23, 2006.
Sungchul Hong, Ildu Kim, Jangheon Kim, Jeonghyeon Cha, YoungYun Woo, Junghwan Moon, and Bumman Kim, "Linearity improvement of uneven 3-way Doherty amplifier using unequal biases of peaking amplifiers," 2006 춘계 마이크로파 및 전파전파 학술대회 논문집, Vol. 29, No. 1, pp 205-208, May, 2006.