一种小型宽带宽波束圆极化微带天线设计  

Design of a Miniaturized Wide-Bandwidth and Beamwidth Circularly-Polarized Microstrip Antenna

作　　者：郭倩[1] 梁仙灵[1] 叶声[1] 金荣洪[1] 耿军平[1] 

机构地区：[1]上海交通大学电子工程系,上海200240

出　　处：《中国电子科学研究院学报》2012年第6期599-602,共4页Journal of China Academy of Electronics and Information Technology

基　　金："973"子课题(2009CB320403);上海市自然科学基金(10ZR1416600);教育部博士点基金(20090073120033);国家科技重大专项(2011ZX03001-007-03);教育部留学回国人员科研启动基金

摘　　要：介绍了一种小型宽带宽波束圆极化微带天线设计。该天线采用双层短路贴片,通过旋转结构设计结合多点馈电技术,实现了微带天线的宽带宽波束圆极化辐射。仿真与测试结果表明:VSWR<2的阻抗带宽为15.9%(1.45～1.7 GHz),半功率波束宽度和3 dB轴比波束宽度在8.6%(1.45～1.58 GHz)的频带内均大于100°,天线尺寸仅为0.43λ×0.43λ×0.035λ。A new type of miniaturized wide-bandwidth and wide beamwidth circularly polarized microstrip antenna is designed.The antenna is composed of dual-resonant stacked shorted patches.A sequentially rotated structure with four feeding point is selected to acquire wide-bandwidth and wide beamwidth circularly polarized radiation.Simulated and measured results show that its impedance bandwidth（VSWR2） is 15.9%（1.45-1.7 GHz）,the half-power and the 3 dB axial ratio beamwidth are more than 100°within the bandwidth of 8.6%（1.45-1.58 GHz）.The antenna size is only 0.43λ×0.43λ×0.035λ（λis the free space wavelength ofthecenter frequency）.

关 键 词：微带天线 圆极化 小型化 宽波束 

分 类 号：TN821.1[电子电信—信息与通信工程]