High gain and circularly polarized substrate integrated waveguide cavity antenna array based on metasurface  

作　　者：白昊 王光明 邹晓鋆 Hao Bai;Guang-Ming Wang;Xiao-Jun Zou(Air and Missile Defend College,Air Force Engineering University of China,Xi'an 710051,China)

机构地区：[1]Air and Missile Defend College,Air Force Engineering University of China,Xi'an 710051,China

出　　处：《Chinese Physics B》2023年第1期298-304,共7页中国物理B（英文版）

基　　金：Project supported by the National Natural Science Foundation of China (Grant No.61871394)。

摘　　要：Two substrate integrated waveguide(SIW) cavity antenna arrays based on metasurface are proposed in this paper. By rotating the metasurface element, circularly polarized and high gain antennas are achieved respectively. Firstly, multi-mode resonance theory is employed to broaden the bandwidth of the slot antenna. And then, an SIW cavity composed of 4×4 cornercut elements is added on the top of the slot antenna to achieve the circular polarization and improve the front-to-back ratio. Thirdly, the metasurface elements are sequentially rotated and a high gain antenna with 2-dBi enhancement on average in the operation band is obtained. Based on the two antenna units, two 2×2 antenna arrays are designed. The circularly polarized and high gain antenna arrays are both fabricated to verify the correctness. Furthermore, the novel wideband phase shifter is employed in the circularly polarized antenna to obtain an operating bandwidth of 38%(4.05 GHz–5.95 GHz)and AR bandwidth of 24.9%(4.4 GHz–5.65 GHz). The bandwidth of the high gain antenna can reach 42.7%(3.95 GHz–6.1 GHz) and with the gain enhancement of 2 dBi compared with that of the circularly polarized antenna. The gain remains steady in most of operating band within a variation of 1 dBi. It is remarkable that the rotating of the metasurface element has a great influence on the antenna performance, which provides a new explication for the multi-function antenna design.

关 键 词：substrate integrated waveguide(SIW) cavity antenna metasurface high gain circularly polarized 

分 类 号：TN820[电子电信—信息与通信工程]