一种宽带双极化印刷天线设计

Design of a Broadband Dual-polarized Printed Antenna

本文设计了一种微带馈电的四片长椭圆槽型印刷天线,具有双极化特性。该天线由两条正交的阶梯微带馈线激励,并通过引入短路探针使其具有较低的交叉极化和较高的端口隔离度。实测结果显示端口1和端口2的相对带宽为47.5%(3.1~5.03GHz)和47.4%(3.2375~5.25GHz),带宽范围内隔离度大于17dB,交叉极化性能良好,实测与仿真结果较为吻合。

In this paper,a microstrip-fed four-piece long elliptical slot printed antenna with dual polarization characteristics is designed.The antenna is excited by two orthogonal stepped microstrip feeders,and it has low cross-polarization and high isolation between two ports by introducing short-circuit probes.The measured results show that the relative bandwidths of port 1 and port 2 are 47.5%(3.1-5.03 GHz)and 47.4%(3.2375~5.25 GHz),isolation is greater than 17 dB,cross polarization is low,which are in good agreement with the simulation results.