Prof. Gangil Byun Ulsan National Institute of Science and Technology |
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Title Backscatter-Modulated Millimeter-Wave Tags for Enhanced Multi-Target Detection and Clutter Suppression Abstract This talk introduces a novel backscatter-modulated tag operating at 60 GHz, designed to enhance multi-target detection and suppress clutter in short-range FMCW radar systems. The proposed tag incorporates a microstrip line, patch antenna, and DC bias lines to enable passive phase modulation without active components. By periodically shifting the reflected phase of incoming radar signals, the beat frequency components move into higher bands, improving resistance to phase noise and environmental clutter. When multiple tags are modulated at distinct frequencies, individual targets can be effectively resolved in both range and Doppler frequency domains. This technique is validated through both simulation and experimental hand gesture sensing scenarios, revealing clearly separated micro-Doppler signatures corresponding to each finger's motion. The proposed approach offers a compact, low-power, and scalable solution for high-resolution sensing in applications such as human-computer interaction, smart environments, and wireless sensing networks. Biography Prof. Gangil Byun (S'12, M'15, SM'21) received his B.S. and M.S. degrees in Electronic and Electrical Engineering from Hongik University, Seoul, South Korea, in 2010 and 2012, respectively. He completed his Ph.D. degree in Electronics and Computer Engineering from Hanyang University, Seoul, South Korea, in 2015.Following his graduation, Dr. Byun joined Hongik University as a Research Professor where he conducted active research for two years. In February 2018, he joined the faculty of Ulsan National Institute of Science and Technology (UNIST), Ulsan, South Korea, where he is currently an Associate Professor in the Department of Electrical Engineering (EE). Since 2022, he has also assumed the role of Director of the Core RF/Power Component Research Center for Low-Orbit Next-Generation Satellites (LONGS). Dr. Byun's primary research focuses on millimeter-wave antennas and metasurfaces with a strong emphasis on advancing adaptive beamforming techniques for diverse applications, including 5G/6G communication, satellite technology, defense systems, and radars. Dr. Byun's distinguished contributions have been pivotal in advancing overall beamforming performance, achieved through a unique integration of antenna engineering and signal processing insights. His current research pursuits extend to display-integrated antennas, antenna-in-package (AiP), and reconfigurable intelligent surface (RIS) to derive innovations for future wireless communication systems. |
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