Dual circularly polarized Fabry-Perot antenna with metamaterial-based corner reflector for high gain and high aperture efficiency

Zhen-Yu Zhao,Hai-Wen Liu,Zhi-Jiao Chen,Meng-Ying Gao,Le Chang,Liang Dong

doi:10.7498/aps.71.20211914

Abstract

Based on the ray-tracing model, a new method of achieving a high gain and high aperture efficiency Fabry-Perot antenna with metamaterial-based corner reflector is proposed. The proposed Fabry-Perot antenna is composed of a dual circularly polarized patch antenna feed and the metamaterial-based corner reflector. The metamaterial-based corner reflector consists of four phase correction metasurfaces and a partially reflective surface. First, theory and analysis of the Fabry-Perot antenna with metamaterial-based corner reflector are presented. Then, the performances of the dual circularly polarized antenna feed, the traditional Fabry-Perot antenna, and the Fabry-Perot antenna with metamaterial-based corner reflector are compared among each other and analyzed. Finally, the proposed Fabry-Perot antenna is fabricated and measured. The measured left-hand circular polarization (LHCP) gain and the measured right-hand circular polarization (RHCP) gain of the proposed Fabry-Perot antenna are 21.4 dBi and 21.3 dBi, respectively. Comparing with the antenna feed, the LHCP gain and RHCP gain of the proposed Fabry-Perot antenna are enhanced by 16.4 dB and 16.3 dB, respectively. Compared with the traditional Fabry-Perot antenna, the metamaterial-based corner reflector acts as both a reflection surface and a phase correction surface. It manipulates the propagation direction and phase of electromagnetic wave. The proposed Fabry-Perot antenna with high gain, high aperture efficiency and low sidelobe at 2.8 GHz paves the way for developing the solar radio telescope and conducting the observation.

Highlights

The metamaterial-based corner reflector consists of four phase correction metasurfaces
right-hand circular polarization (RHCP) gain of the proposed Fabry-Perot antenna are enhanced by 16.4 dB
low sidelobe at 2.8 GHz paves the way for developing the solar radio telescope

Summary

Introduction

芯内双微孔复合腔结构的光纤法布里-珀罗传感器研究 Dual micro-holes-based in-fiber Fabry-Perot interferometer sensor 物理学报. 所设计 Fabry-Perot 天线工作在 2.8 GHz 频段, 具有高增益、高口径效率和低旁瓣的优点, 满足了太阳射电望远镜 F107 指数观测的需求. 超材料角反射面包括 4 个相位校正超表面 (phase correction metasurface, PCM) 和 1 个非均匀部分反射表面 (partially reflective surface, PRS). 通过在 PRS 四周增加了 4 个 PCM 构成超材料角反射面, 能够实现对 F-P 天线边缘电磁波进行相位校正, 从而提升天线增益. 4π φPRS − φGND − λ h cos α + φPCM = −2kπ .

Results

Conclusion