一种高隔离度Ku波段双频双极化微带天线阵  

A High Isolated Dual-frequency Dual-polarized Ku-band Microstrip Array Antenna

作　　者：徐烨[1] 梁仙灵[1] 王文智[1] 叶声[1] 陈振宁[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：《中国电子科学研究院学报》2011年第2期212-216,共5页Journal of China Academy of Electronics and Information Technology

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);重大专项项目(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波段双频双极化微带天线单元及其阵列设计。该阵列为多层结构,单元形式采用叠层的长方形贴片形式,实现宽带双频的性能。不同极化的馈电网络设置在不同的介质层,并采用了镜像馈电技术,实现高极化隔离和低交叉极化特性。4×4元子阵仿真与测试结果表明:水平极化和垂直极化端口相对阻抗带宽(VSWR<2)分别达14.56%和10.2%,双极化端口隔离度优于33.3 dB。该子阵在12.5 GHz频段和14.25 GHz频段的最大增益分别达到18.6 dBi和18.7 dBi。A new dual-frequency dual-polarized antenna element and array design is presented for Ku-band applications.The array is a multi-layer structure,where the element adopts stacked rectangular patches to realize dual wideband performance.In order to obtain the antenna with high polarization isolation and low cross-polarization,the feed networks for different polarizations are located on different layers together with mirror feed technology.Moreover,the simulated and measured results of the 4×4-element array antenna show that the relative impedance bandwidth（VSWR2） of the horizontal polarization and the vertical polarization ports are 14.56% and 10.2% respectively.The isolation of the dual-polarized ports is higher than 33.3 dB.The maximum gains are 18.6 dBi and 18.7 dBi at 12.5 GHz-band and 14.25 GHz-band,respectively.

关 键 词：微带天线阵 双频段 双极化 高隔离度 

分 类 号：TN822[电子电信—信息与通信工程]