K波段双圆极化波导阵列天线设计

传统的双极化波导缝隙天线阵每种极化方式交叉极化较差,极化端口隔离度不高,尤其实现共口径辐射难度较大。介绍了一种K波段双圆极化波导阵列天线设计方法, 重点讨论了高效率共口径双极化辐射单元、宽带圆极化器、低损耗波导馈电网络。利用仿真软件进行了优化仿真分析,在此基础上研制了样件,对其电性能进行了测量。测试结果表明,此双圆极化波导阵列天线具有效率高、轴比带宽宽、隔离度高等特点。

Design of K-band dual-circularly-polarization waveguide array antennas

The cross-polarizations and the polarization port isolation performance of conventional dual-polarization waveguide slotted array antennas are poor, especially difficult to realize co-aperture dual-circularly-polarization radiation. A novel dual-circularly-polarization waveguide array antenna at K-band is studied. The high-efficiency dual-polarized co-aperture radiation element, wide-band polarizer, low loss feed network are discussed,simulated and optimized by software. A prototype has been made and tested. The measured results show that waveguide array antennas proposed have the characteristics of high efficiency, wide-band of axial ratio,and high isolation.