一种新型宽带宽波束圆极化微带天线的设计  

Design of a new circularly-polarized broadband microstrip antenna with broad beamwidth

作　　者：钱祖平[1,2] 刘宗全[1] 冯卫华[1] 倪为民[1] 

机构地区：[1]解放军理工大学,江苏南京210007 [2]东南大学毫米波国家重点实验室,江苏南京210096

出　　处：《电波科学学报》2011年第6期1170-1175,共6页Chinese Journal of Radio Science

基　　金：国家自然科学基金(NO.60872046)资助

摘　　要：设计了一种新型的用于卫星通信的三馈宽带圆极化微带天线。天线在1500～1900MHz频带内实现圆极化辐射。馈电网络采用三功分馈电,增加了轴比带宽和宽角轴比带宽;网络和附加的寄生贴片展宽了阻抗带宽;延伸天线介质衬底增大了波束宽度。实测结果表明:天线电压驻波比(VSWR)小于2的带宽达到62.5%,轴比(AR)小于3dB的带宽达到33%,实现了天线宽带宽波束性能。A new circularly-polarized broadband microstrip antenna with three feeds which can be used in satellite communications is designed.The proposed antenna can realize circularly-polarized radiation at 1500~1900 MHz.The feeding network adopts a one-three power divider which can increase the bandwidth of axial ratio and wide-angle axial ratio.The bandwidth is greatly increased by feeding network and the parasitic patch.The beamwidth is broadened by extending the size of dielectric substrate of antenna.The measured results show that the 62.5%（VSWR≤2） bandwidth and 33%（AR≤3 dB）axial ratio bandwidth are achieved respectively,which obtains the good performance of wide-band and broad beamwidth.

关 键 词：圆极化 宽带 宽波束 三馈 

分 类 号：TN820.11[电子电信—信息与通信工程]