• Power Amplifiers for Mobile Communication
    • RF circuits Design and Device Modeling
    • III-V Component Semiconductor/MMIC Design and Fabrication
    • mm-wave Circuits  


    • Carnegie-Mellon University Ph.D in Electrical Engineering, 1979
    • The University of Texas at Austin M.S. in Electrical Engineering, 1974
    • Seoul National University B.S. in Electronics Engineering, 1972


    • Served in Korean Army (1967-1970)


    • Fellow of IET & IEEE
    • Life-time member, Korea Academy of Science and Technology
    • Member, National Academy of Engineering of Korea
    • Associate Editor, IEEE Transaction on Microwave Theory and Technique (2003 ~ 2005)
    • Associate Vice President, Korean Electronics Engineering Association (2004 ~ 2005)
    • Distingushed Lecturer of IEEE MTT Society (2005 ~ 2007)
    • Member of IEEE MTT Adcom, MTT-5 & 17
    • Member of General Assembly of EUMA


    • Elected to POSTECH Fellow, Sep. 2009
    • Kyung-Ahm education & culture foundation, Nov. 2008
    • Nam-Ko Chaired Professor of Electronics Engineering since Apr. 2004
    • Chairman, Department of Electronics and Electrical Engineering
    • Director, BK Program for Electronics and Computer Engineering
    • Dean of Academic Affairs in POSTECH Aug. 1998 - May.2000
    • Director, Microwave Application Research Center( funded by ADD ) since Dec. 1994
    • Manager, Department of Electronics, RIST Oct. 1989 - May 1994
    • Associate/Full Professor Dept. of Electronics and Electrical Eng. Postech since Aug. 1989
      • Major Accomplishments :
        • Founding Director of Microwave Application Research Center funded by Ministry of National Defense (9yr project).
        • Developed  Highly Efficient Linear Power Amplifier using Doherty-type Circuit
        • Linear power amplifier design for digital mobile communication system. (base station and handset)
        • Transceiver Design for Handset
        • RF Device Modelling for HBT and CMOS
        • InP HBT with Fmax over 600GHz
        • HBT 1/f noise modeling/ High frequency noise
        • Investigation of HBT linear characteristics and structure optimization.
        • mm-wave circuit
           
    • Senior Member of Technical Staff at Central Research Labs. Texas Instruments May 1981 - July 1989
      • Major Accomplishments:
        • Pioneering work on millimeter-wave power MESFET
        • First demonstration of mm-wave MMIC.
        • Demonstration of ultra-broadband distributed power amplifiers ( 0.5W across 2-20GHz )
        • First three terminal device oscillator operation over 100GHz.
        • First high power operation of Heterojunction Bipolar Transistor.
        • High power operation of GaAlAs/GaAs MISFET
        • Large signal modeling work on power FETs
        • Design/simulation of various microwave control component circuits.
           
    • Member of Technical Staff at GTE Laboratories Inc. 1978-1981
      • Major Accomplishments:
        • Diode laser-to-fiber coupling
        • Semiconductor laser packaging
        • Other fiber optic network components such as optical switch, power divider, modulator, and optical amplifier.


    • International Journal Papers
    • International Conference Proceeding
    • Domestic Journal Papers
    • Domestic Conference Proceeding
    • Achievement of Research & Development