Recent Developments of Transmissive Reconfigurable Intelligent Surfaces: A Review
Release Date：2022-03-16 Author：TANG Junwen, XU Shenheng, YANG Fan, LI Maokun Click：
Recent Developments of Transmissive Reconfigurable Intelligent Surfaces: A Review
TANG Junwen, XU Shenheng, YANG Fan, LI Maokun
(Department of Electronic Engineering, Tsinghua University, Beijing 100084, China)
Abstract: RIS is considered as one of the key technologies for the next-generation mobile communication systems. The transmissive RIS can achieve dynamic beamforming capability while transmitting an in-band RF signal through its aperture, and has promising prospects in various practical application scenarios. This paper reviews some of the latest developments of the transmissive RIS. The approaches for transmissive RIS designs are classified and described briefly. Numerous designs with different phase resolutions, such as 1-bit, 2-bit or continuous 360° phase shifts, are presented, with detailed discussions on their operating mechanisms and transmission performances. The design solutions for various transmissive RIS elements are summarized and compared.
Keywords: antenna; mobile communications; phase shifter; RIS; transmit array
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