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Circularly Polarized Metasurface Phased Array Antenna System With Wide Axial-Ratio Beamwidth for LEO Mobile Satellite Communication

2023; IEEE Antennas & Propagation Society; Volume: 71; Issue: 6 Linguagem: Inglês

10.1109/tap.2023.3265312

1558-2221

Yingsong Zhang, Wei Hong, Zhidan Ding, Long Yang, Cheng Zhu, Yun Hu,

Antenna Design and Optimization

In this article, a millimeter-wave LHCP $1\times32$ with a dummy on both sides phased array antenna is proposed. Multilayer structure and single feed are employed. The antenna patch adopts a $3\times $ 3 metasurface. The measured impedance bandwidth is 20%, ranging from 22.5 to 27.5 GHz. The axial ratio (AR) bandwidth with an AR level < 3 dB achieves 3.35 GHz ranging from 24.15 to 27.5 GHz. Relative 3-dB AR bandwidth reaches 13.4%. A total of 37 beams were measured in the anechoic chamber. The results show that whether the phased array antenna system serves as transmitter or receiver, the 3-dB beam angle coverage at 26 GHz reaches from −42° to 45° at $\varphi $ = 0° and from −42° to 42° at $\varphi $ = 90°. The 3-dB AR beam angle ranges from −80° to 89° at $\varphi $ = 0°, and from −45° to 45° at $\varphi $ = 90°. Based on this linear array, it is easy to expand to circular polarization planar wide-angle scanning phased array. The antenna system realizes circular polarization with wide angle wide AR beam scanning, which can be used in low Earth orbit (LEO) satellite communication system.