The BRADLEY DEPARTMENT of ELECTRICAL and COMPUTER ENGINEERING

ECE FACULTY

Kwang-Jin (K-J) Koh

Picture of Kwang-Jin (K-J) Koh

Office:
Room 460 Whittemore Hall

Mailing Address:
302 Whittemore (0111)
Virginia Tech
Blacksburg, VA 24061

(540) 231-7778
(540) 231-3362
kkoh@vt.edu


Education:

Ph.D., University of California, San Diego, 2008
M.S., Korea Advanced Institute of Science & Technology (KAIST), Korea, 2001
B.S., Chung-Ang University, Korea, 1999

Teaching Interests:

RF, analog and mm-wave integrated circuits and systems; Mixed-mode integrated circuits and systems; Low-power low-noise electronics; High-power electronics

Research Interests:

Low power RF, analog and mixed-mode ICs; High-efficient power amplifiers; Integrated tunable filters; mm-wave circuits and systems; Tera-hertz electronics

Selected Publications:
  • Title: A Mixed-Mode Injection Frequency-Locked Loop for Self-Calibration of Injection Locking Range and Phase Noise in 0.13-um CMOS
    Author(s): Dongseok Shin, Sanjay Raman, and Kwang-Jin Koh
    Conference: IEEE International Solid-State Circuits Conference (ISSCC), accepted, February 2016
  • Title: A 28-GHz Inverse Class-F Power Amplifier with Coupled-Inductor based Harmonic Impedance Modulator
    Author(s): Seyed Yahya Mortazavi and Kwang-Jin Koh
    Conference: IEEE Custom Integrated Circuits Conference (CICC), San Jose, USA, September 2015
  • Title: 2-4 GHz Q-Tunable LC Bandpass Filter with 172-dB.Hz Peak Dynamic Range, Resilient to +15-dBm Out-of-Band Blocker
    Author(s): Laya Mohammadi and Kwang-Jin Koh
    Conference: IEEE Custom Integrated Circuits Conference (CICC), San Jose, USA, September 2015
  • Title: A 0.6-V, 30-GHz Six-Phase VCO with Superharmonic Coupling in 32-nm SOI CMOS Technology
    Author(s): Dongseok Shin, Sanjay Raman, and Kwang-Jin Koh
    Conference: IEEE Custom Integrated Circuits Conference (CICC), San Jose, USA, September 2015
  • Title: Integrated C-Band (4-8 GHz) Frequency-Tunable & Bandwidth-Tunable Active Band-Stop Filter in 0.13-?m SiGe BiCMOS
    Author(s): Laya Mohammadi and Kwang-Jin Koh
    Conference: IEEE Int. Microwave Symposium (IMS, Best Paper Award - Second Place), May 2015
  • Title: 94 GHz Bidirectional Variable Gain Amplifier in 0.13-?m SiGe BiCMOS for Phased Array Transmit and Receive (T/R) Applications
    Author(s): Sadia Afroz and Kwang-Jin Koh
    Conference: IEEE Int. Microwave Symposium (IMS), May 2015
  • Title: A 38 GHz inverse class-F power amplifier with 38.5% peak PAE, 16.5 dB Gain, and 50 mW Psat in 0.13-?m SiGe BiCMOS
    Author(s): Seyed Yahya Mortazavi and Kwang-Jin Koh
    Conference: IEEE RFIC Symposium, May 2015
  • Title: A Class F-1/F 24-to-31GHz power amplifier with 40.7% peak PAE, 15dBm OP-1dB, and 50 mW Psat in 0.13-?m SiGe BiCMOS
    Author(s): Seyed Yahya Mortazavi and Kwang-Jin Koh
    Conference: IEEE Solid-State Circuits Conference (ISSCC) Digest 2014
  • Title: Time-Interleaved Phased Arrays With Parallel Signal Processing in RF Modulations
    Author(s): Kwang-Jin Koh and Hedieh Elyasi
    Journal: IEEE Trans. on Antenna and Propagation (shorted-listed paper for IEEE AP Society R. W. King Award), 677-689, February, 2014
  • Title: A Millimeter-Wave (40-45 GHz) 16-Element Phased-Array Transmitter in 0.18-um SiGe BiCMOS technology
    Author(s): Kwang-Jin Koh, Jason W. May, and Gabriel M. Rebeiz
    Journal: IEEE J. Solid State Circuits (JSSC, included in a DARPA War Report to U.S. Pentagon as a major agency's achievement), 1498-1509, May, 2009