Wideband Transmit-Reflect-Array Using Optimized Mosaic Metasurface: Toward Dual-Circularly Polarized Beam Coverage in Full Space
- Resource Type
- Conference
- Authors
- Yang, Weixu; Tang, Kui; Zhu, Ying; Chen, Ke; Feng, Yijun
- Source
- 2023 IEEE 11th Asia-Pacific Conference on Antennas and Propagation (APCAP) Antennas and Propagation (APCAP), 2023 IEEE 11th Asia-Pacific Conference on. volume1:1-2 Nov, 2023
- Subject
- Components, Circuits, Devices and Systems
Fields, Waves and Electromagnetics
Satellites
Array signal processing
Space communications
Prototypes
Optimization methods
Gain measurement
Metasurfaces
- Language
A strategy for designing a dual-circularly polarized (DCP) transmit-reflect-array (TRA) based on a mosaic metasurface is proposed. The mosaic metasurface with a thin panel thickness of 0.14 $\lambda_{0}$ is created by mixing two types of full-space meta-atoms using a genetic algorithm-based optimization method, which provides four degrees of freedom of beamforming to independently manipulate the transmitted and reflected DCP beams. The measured bandwidth of the prototype is better than 30.7% for the transmitarray and 47.5% for the reflectarray, with both gain variation and axial ratio below 3 dB.