Multi-Beam Quad-Polarized Transmit-Array Antenna with Arbitrary Radiation Direction for Vehicle Communication via Generalized Phase Superposition

A four-beam, quad-polarized transmit-array antenna (TA) is proposed, which can simultaneously radiate x -polarized (XP), y -polarized (YP), left-hand circularly polarized (LHCP), and right-hand circularly polarized (RHCP) high-gain beams. Firstly, a quasi-anisotropic element is designed based on the...

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Bibliographic Details
Published in:IEEE transactions on antennas and propagation 2024-12, p.1-1
Main Authors: Zhang, Chao, Luo, Yu, He, Yingran, Yan, Ningning, Ma, Kaixue
Format: Article
Language:English
Subjects:
Antenna feeds
Apertures
Communication systems
Metasurface
Metasurfaces
multi-beam
phase superposition
quad-polarization
Reliability
Resonant frequency
Satellite antennas
Switches
transmit-array
Transmitting antennas
Tuning
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Summary:A four-beam, quad-polarized transmit-array antenna (TA) is proposed, which can simultaneously radiate x -polarized (XP), y -polarized (YP), left-hand circularly polarized (LHCP), and right-hand circularly polarized (RHCP) high-gain beams. Firstly, a quasi-anisotropic element is designed based on the stacked cross-shaped patch structure, and its phase response for XP and YP electromagnetic waves can be approximately independently adjusted. Then the TA can radiate different linear polarized beams based on various XP and YP phase distributions on the aperture. Next, LHCP and RHCP beams can be generated by making the XP and YP beams radiate in the same direction with a ±90° transmission phase difference. Thirdly, the generalized phase superposition method is applied so that the proposed design can obtain the multi-beam multi-polarization radiation characteristics. Finally, to improve the phase compensation accuracy of the metasurface aperture, an optimized aperture deployment approach is proposed, which can quickly find the optimal element distribution and reduce the phase error between the actual phase and the target phase on the aperture. A four-beam quad-polarized TA with 20×20 elements is designed, fabricated, and measured. The measured 1 dB gain bandwidth of each beam is about 5%, and the peak aperture efficiency is 26.99%, which proves that the proposed TA has stable multi-beam and multi-polarization multiplexing characteristics.
ISSN:0018-926X
DOI:10.1109/TAP.2024.3505596