Abstract:
Advances in 6G wireless are pushing communication into the mm-wave bands, enabling compact Antennas-on-Chip (AoC). However, AoC radiation efficiency is limited by lossy silicon substrates. This talk presents new methods to enhance AoC performance using advanced artificial magnetic conductors (AMCs) tailored for ultra-thin CMOS processes.
First, an ultra-thin AMC with CMOS-compatible thickness is introduced. Metallic Posts and an Embedded Guiding Structure are used to reduce AMC thickness by 41% and achieve 5.85 dBi gain and 57% radiation efficiency at 94 GHz. Illumination is improved using electric and magnetic coupling enhancement structures, enhance the gain to 10 dB and the bandwidth by 6 times. Finally, reconfigurability is demonstrated in an AMC-backed AoC with a VO₂-based superstrate, enabling switching between 94 GHz and 106 GHz with end-fire radiation and vertical polarization.
These innovations overcome key limitations in AoC design, supporting more efficient and adaptable antennas for future 6G systems.
Biography:
Yiyang Yu (Graduate Student Member, IEEE) received the B.Eng. degree in electromagnetics and wireless technology from the University of Electronic Science and Technology of China (UESTC), China, in 2019, and the M.S. and Ph.D. degrees in electrical and computer engineering from the King Abdullah University of Science and Technology (KAUST), Saudi Arabia, in 2021 and 2025 respectively. He currently works as a Post-Doctoral Fellow with the School of Microelectronics and Communication Engineering, Chongqing University, China. His current research interests include millimeter-wave antennas, on-chip antennas, artificial magnetic conductors, and electrically small antennas. Dr. Yu was awarded the 2022 IEEE Antennas and Propagation Society Fellowship. He was a recipient of the second prize in the Poster Contest of the 2022 Research Conference on Extreme Bandwidth Communication. He serves as a reviewer for several journals, including IEEE Transactions on Antennas and Propagation.
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