高隔离度双极化微带贴片天线的设计  

Design of a dual-polarized microstrip patch antenna with high isolation

作　　者：梁仙灵[1] 钟顺时[1] 汪伟[1] 

机构地区：[1]上海大学通信工程系,上海200072

出　　处：《电波科学学报》2006年第5期731-734,755,共5页Chinese Journal of Radio Science

基　　金：高等学校博士学科点专项科研基金资助项目(20050280016);上海市重点学科建设基金资助项目(T0102)

摘　　要：对双极化方形微带贴片天线端口之间的隔离作了理论与实验研究。基于腔模理论，直观地分析了高次模的激励影响单元两极化端口之间的隔离，并解释了反相馈电抑制其端口耦合的原理。设计、加工了一种新型的双极化微带贴片单元，理论仿真与实验测试结果吻合得很好，证实了应用该方法可使单元两极化端口间的隔离度提高约10～20dB。The isolation of a dual-polarized microstrip patch antenna is investigated theoretically and experimentally. Based on the cavity model theory, the isolation between two input ports affected by the higher order modes is analyzed, and the method of anti-phase feeding technique contributing to suppress the input-port coupling is also presented. Besides, a new type of dual-polarized microstrip patch antenna is designed and fabricated. The good agreement between the simulated and experimental results confirms that the isolation between two polarization ports can greatly be improved （about 10～20dB） using the anti-phase feeding technique.

关 键 词：微带贴片天线 双极化 隔离度 

分 类 号：TN821.1[电子电信—信息与通信工程]