基于超材料角反射面的高增益高效率双圆极化Fabry-Perot天线设计  

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

作　　者：赵振宇[1] 刘海文 陈智娇 董亮[3] 常乐[1] 高萌英 Zhao Zhen-Yu;Liu Hai-Wen;Chen Zhi-Jiao;Dong Liang;Chang Le;Gao Meng-Ying(School of Information and Communications Engineering,Xi’an Jiaotong University,Xi’an 710049,China;School of Electronic Engineering,Beijing University of Posts and Telecommunications,Beijing 100876,China;Yunnan Observatory,Chinese Academy of Sciences,Kunming 650216,China)

机构地区：[1]西安交通大学信息与通信工程学院,西安710049 [2]北京邮电大学电子工程学院,北京100876 [3]中国科学院云南天文台,昆明650216

出　　处：《物理学报》2022年第4期71-79,共9页Acta Physica Sinica

基　　金：国家自然科学基金(批准号:11941003);国家自然科学基金重点项目(批准号:U1831201);国家自然科学基金联合基金(批准号:U2031133);国家重点研发计划(批准号:2017YFE0128200);云南省应用基础研究计划(批准号:2019FB009)资助的课题。

摘　　要：基于射线跟踪模型,提出了一种超材料角反射面结构,实现了Fabry-Perot天线增益和口径效率的提升.首先对基于超材料角反射面的Fabry-Perot天线进行了理论推导和分析.然后,设计并分析了双圆极化馈源、基于超材料角反射面的Fabry-Perot天线及其性能.最后,对所提出的Fabry-Perot天线模型进行了制造和测试.结果表明,该天线的左圆极化增益和右圆极化增益分别为21.4 dBi和21.3 dBi.相比馈源天线,增益分别提高了16.4 dB和16.3 dB.与传统Fabry-Perot天线相比,所提出超材料角反射面同时充当了反射面和相位校正面,实现了对Fabry-Perot天线边缘电磁波的有效调控.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.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.

关 键 词：超材料角反射面 Fabry-Perot天线 高增益 高口径效率 太阳射电望远镜 

分 类 号：TN820[电子电信—信息与通信工程]