Dr. Mei Li

Invited Speech Title: Holographic metasurface antennas with high aperture efficiency and their polarization-reconfigurable implementation

Speaker's Bio:
Mei Li received the Ph.D. degree in radio physics from the University of Electronic Science and Technology of China, Chengdu, in 2016. She was a Visiting Graduate Student with the Applied Electromagnetics Research Group, University of California at San Diego, La Jolla, CA, USA, from 2014 to 2016. Since 2016, she has been work with the Department of Microelectronics and Communication Engineering at Chongqing University. Her research interests include reconfigurable antennas, phased arrays, artificial electromagnetic structures, and holographic metasurfaces. She serves as a reviewer for several international journals including IEEE Transactions on Antennas and Propagation, IEEE Transactions on Industrial Electronics, et al. She has published more than 30 publications on international journals and conferences such as IEEE Trans. Antenna Propag.

Invited Speech Abstract:
Holographicmetasurface antennas, which are essentially leaky-wave antennas with radiation performance of high gain and pencil beams, are usually comprised by a periodically modulated metasurface and a feeding launcher embedded in the aperture plane. Due to the simple manufacture process of standard printed-circuit techniques, holographic metasurface antennas have the advantages of planar configuration, low cost, lightweight, and conformability, and thereby have great potential to be utilized in many practical applications such assatellite communication scenarios.Although many papers have been recently published on holographic antennas, none of them has studied polarization-reconfigurable operation. Traditional scalar holographic metasurfaces are able to support a TE or TM lower order Floquet mode, and have the drawback of polarization sensitivity, which results in a mismatch between the E- and H-plane beamwidths when excited by a horizontal dipole, and thus a low aperture efficiency. In this talk, a polarization-insensitive holographic metasurface with high aperture efficiency is first introduced and then when integrated with a polarization-reconfigurable feeding launcher, a polarization-reconfigurable holographic metasurface antenna withbroadside radiation performance and LP, RHCP and LHCP polarization diversity is successfully realized.