I received his B.S. in control and instrumentation engineering from Seoul National University in 1987, his M.S. in electrical and computer engineering from the University of South Carolina in 1995, and his Ph.D. in electrical and computer engineering from the University of Colorado in 1998. From 1987 to 1993, he worked at LG Electronics with a focus on communication systems. From 1999 to 2003, he worked for Curitel, where he was principally involved with the development of mobile phones. He joined the School of Electronics and Information Engineering at Korea Aerospace University in 2004. His research interests include the design of RFIC/MMIC, millimeter-wave ICs, analog circuits, microwave imaging and radar systems.