shuai zhang

Performance Enhancement of Mechanically Beam-Steerable Transmitarrays with Low Profile

Transmitarrays (TAs) have widely been utilized in the different applications. TAs can realize a high gain without a feeding network at millimeter-waves so that insertion loss can be minimized. However, conventional TAs suffer from the issue of high profile. Furthermore, the capability of beam steering is highly preferred for satellite and mobile communications. TAs are able to achieve beam scanning with electrical or mechanical control. For the electrical control, it is typically implemented by loading RF components (e.g., PIN diode, etc.) on each unit cell to achieve tunable transmission phases by controlling DC bias, which are high cost, high loss, and high complexity. This talk will discuss some recent advances of performance enhancement techniques for mechanically beam-steerable TAs with low profile. The introduced methods are general and can easily be implemented in other TA designs.

Shuai ZHANG received the B.E. degree from the University of Electronic Science and Technology of China, Chengdu, China, in 2007 and the Ph.D. degree in electromagnetic engineering from the Royal Institute of Technology (KTH), Stockholm, Sweden, in 2013. In 2014, he joined Aalborg University, Denmark, where he currently the Head of Antenna Research Group with over 13 staff. He has also been admitted to a promotion program to a Full Professor at Aalborg University since 2022. He has supervised/co-supervised 8 Postdocs and 17 PhD students since 2017. His current research interests include: antennas for handset and base station communications, bio-electromagnetics, metasurfaces, CubeSat antennas, Massive MIMO antennas, and antennas for wireless sensors. In these areas, he has coauthored over 120 articles in well-reputed international journals and 17 US or WO patents. His citations in Scopus are over 4600 with H index of 34. He is the Associate Editor for IEEE Antennas and Wireless Propagation Letters Sensors and IET Microwaves, Antennas and Propagation. He is also a reviewer for all the top IEEE and IET journals in antenna areas, where he got the prize of “Top Reviewers in IEEE Transactions on Antennas and Propagation 2019-2020, 2020-2021, and 2022-2023”. He is the General Co-Chair for iWAT2023 at Aalborg, Denmark, the Super TPC for IEEE APS 2020 and 2021, and the TPC for several top IEEE conferences. He is the recipient of “IEEE Antennas and Propagation Society Young Professional Ambassador” in 2022, where he gives presentation for different IEEE Chapters on Antennas for Cellular Communications. He has also been intensively invited to international conference and industry to give keynote/plenary speech and presentations.