Heungjae-Choi

Heungjae Choi (S’06–M’11) received the B.S., M.S., and Ph.D. degrees in electronic engineering from Jeonbuk National University, Jeonju, Republic of Korea, in 2004, 2006, and 2011, respectively. From 2006 to 2011, he served his alternative military service as a Specialty Research Worker. He is a Lecturer in High Frequency Engineering and the Deputy Research Group Leader at the Centre for High Frequency Engineering, Cardiff University, U.K.

His primary research interests lie in microwave interdisciplinary science, where microwave fields are applied to fundamental and applied problems across physics, chemistry, bioscience, and medicine. This includes microwave-enhanced chemical reactions, dielectric and biological material characterisation, non-thermal microwave–biological interactions, and the development of bespoke microwave instrumentation and high-power applicators for analytical, diagnostic, and therapeutic systems. His work encompasses microwave applicators for materials processing, high-throughput biological assays, and the Wellcome Trust–funded non-invasive microwave blood glucose monitoring sensor.

Dr. Choi also conducts extensive research on high-efficiency power amplifiers and RF/microwave circuit design. He has advanced measurement and modelling methodologies for GaN-on-Si, GaN-on-SiC, and GaN-on-Diamond technologies, integrating device physics with system-level RF instrumentation. His expertise spans COMSOL Multiphysics electromagnetic–thermal modelling, nonlinear RF measurement systems, and mmWave on-wafer characterisation.

Dr. Choi is a member of the IEEE Microwave Theory and Techniques Society (MTT-S) Technical Committee 28 on Biological Effects and Medical Applications, and is serving as an Associate Editor for IEEE Transactions on Microwave Theory and Techniques. His recognitions include the IEEE MTT-S High-Efficiency Power Amplifier Design Competition Outstanding Achievement Award, the Samsung Human Tech Thesis Prize, and awards from the U.K. government and global industry including SET for BRITAIN Awards and GE Healthcare Life Sciences Sensors Challenges. He is also an active STEM Ambassador, committed to public engagement and interdisciplinary science outreach.