一种新型Ku频段宽带高增益双极化微带天线阵列  

A novel dual-polarization microstrip antenna array with wideband and high gain in Ku band

作　　者：陈振宁[1] 梁仙灵[1] 叶声[1] 王文智[1] 徐烨[1] 耿军平[1] 金荣洪[1] 

机构地区：[1]教育部高速电子系统设计与电磁兼容研究重点实验室,上海交通大学,上海200240

出　　处：《电波科学学报》2011年第4期661-665,共5页Chinese Journal of Radio Science

基　　金：国家973项目(2009CB320205);国家自然科学基金委创新研究群体基金项目(60821062);重大专项(2011ZX03001-007-03);上海市自然科学基金(10ZR1416600);教育部博士点专项基金(20090073120033);航天基金重点;航天支撑基金

摘　　要：介绍了一种新型的Ku频段宽带高增益双极化微带贴片单元及96元阵列的设计。设计中单元采用层叠贴片天线结构,提高了单元的带宽和增益,两个极化端口采用分层馈电,其中水平极化端口采用共面馈电,垂直极化端口采用探针背馈。在馈电网络的设计中引入反向馈电技术,降低了交叉极化。仿真与实测结果表明:该阵列增益达到了26dBi,口径效率约为51%,交叉极化电平小于-30dB,水平极化端口相对阻抗带宽达11.3%,垂直极化端口相对阻抗带宽达13.7%,两端口隔离度高于40dB.In this paper, a novel design of dual-polarized microstrip patch element and 96-element array with wide bandwidth and high gain is proposed for Ku band application. A stacked patch antenna （SPA） architecture is adopted in the element design in order to increase the bandwidth and gain. Dualqayered feeding technique is used to achieve the dual-polarization, where the horizontal polarization port is fed with a coplanar microstrip line, while the vertical polarization port is excited by a probe. The anti-phase feeding technique is considered in design of the feeding net- work, which leads to lower cross polarization. The simulated and experimental resuits show that the gain of the array with 96-element reaches 26 dBi with an aperture efficiency of 51%, the cross-polarization is lower than -30 dB. In addition, the relative impedance bandwidths of the horizontal and vertical polarization ports are 11.3% and 13.7% , respectively, and the isolation between the dual polarization ports is better than 40dB.

关 键 词：双极化 层叠贴片天线 微带阵列 

分 类 号：TN822[电子电信—信息与通信工程]