中文摘要：

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。

英文摘要：

The cross-polarizations and the polarization port isolation performance of conventional dual-polariza-tion waveguide slotted array antennas are poor,especially difficult to realize co-aperture dual-circularly-polariza-tion radiation.A novel dual-circularly-polarization waveguide array antenna at K-band is studied.The high-effi-ciency 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.