High-gain circularly polarized resonant cavity antenna using FSS superstrate

Shih-Chia Chiu, Shih-Yuan Chen
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引用次数: 20

Abstract

A novel high-gain, circularly polarized resonant cavity antenna (RCA) using a two-layer frequency selective surface (FSS) as its superstrate is presented. In the proposed design, two kinds of FSSs, namely an inductive sheet and a capacitive sheet, are used, both of which are designed to be highly reflective to achieve gain and directivity enhancement. Furthermore, by properly designing the dimensions of these two sheets and aligning them, the linearly polarized wave radiated by the source patch antenna can be transformed into circularly polarized radiation. Based on the operating principles of RCAs, the modeling, design, and characterization of the FSS-based superstrate for use in the antenna are also presented. A broadside peak gain of 13.12 dBi, a flat gain response, and a wide axial-ratio bandwidth of the proposed antenna are achieved.
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基于FSS层板的高增益圆极化谐振腔天线
提出了一种新型的高增益圆极化谐振腔天线(RCA),该天线采用双层频率选择表面(FSS)作为其上覆层。在提出的设计中,使用了两种fss,即电感片和电容片,这两种fss都被设计成高反射,以实现增益和指向性增强。此外,通过合理设计两片片的尺寸并对正,可以将源贴片天线辐射的线极化波转换为圆极化辐射。在rca工作原理的基础上,提出了基于fss的天线层的建模、设计和表征方法。该天线具有13.12 dBi的宽侧峰值增益、平坦的增益响应和宽的轴比带宽。
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