一种曲折L型探针馈电的双极化贴片天线端口隔离度研究

Study on Isolation Technique between the Inport and the Outport of a Dual-Polarized Patch Atenna Fed by Tortuous L-probe

本文提出了一种中心频率为915MHz的新型曲折L型探针馈电的双极化贴片天线结构,这种结构比传统的探针馈电结构有更好的端口隔离度。经过HFSS仿真软件仿真计算,其电压驻波比VSWR<1.5(S11<-14dB)条件下,端口间隔离度S21<-37dB,交叉极化小于-20dB。

In this paper, a dual-polarized patch antenna fed by a tortuous L-probe with the center frequency of 915MHz is proposed. This structure has a higher feed port isolation than the traditional L-probe. The proposed antenna is analyzed by HFSS. In the bandwidth （VSWR＆lt;1.5）, the isolation of two ports is under-37dB, the isolation of polarization is under-20dB.