具有稳定方向图的双波束背腔缝隙天线设计  

Design of Dual-beam Cavity-Backed Slot Antenna with Stable Patterns

作　　者：张智锋[1] 程通 姜文[2] 徐鹏达 黄桂树 ZHANG Zhifeng;CHENG Tong;JIANG Wen;XU Pengda;HUANG Guishu(The 54th Research Institute of CETC,Shijiazhuang 050081,China;Science and Technology on Antennas and Microwave Lab.,Xidian University,Xi’an 710071,China;Transportation Integrated Administrative Law Enforcement Bureau of Jilin Province,Changchun 130022,China)

机构地区：[1]中国电子科技集团公司第五十四研究所,河北石家庄050081 [2]西安电子科技大学天线与微波技术重点实验室,陕西西安710071 [3]吉林省交通运输综合行政执法局,吉林长春130022

出　　处：《无线电工程》2021年第8期810-815,共6页Radio Engineering

基　　金：国家自然科学基金资助项目(62071347)。

摘　　要：提出一种具有稳定辐射方向图的宽带双波束基片集成波导背腔缝隙天线。天线由4个子腔组成,椭圆形缝隙刻在上表面,同轴探头放在中心,对4个子腔体馈电。由于结构的对称性,实现了4个相对于边射方向完全镜像对称的波束。随着频率的变化,最大辐射方向的变化仅为2°,显示出良好的稳定性。测量结果表明,该天线实现了16.6%(14.9~17.6 GHz)的阻抗带宽,最大增益为7.6 dBi,在工作频带中的增益波动小于0.7 dB。A broadband dual-beam substrate integrated waveguide(SIW)cavity-backed slot antenna with stable radiation pattern is proposed.The antenna is composed of four sub-cavities with the elliptical slot etched on the upper surface,and the coaxial probe is placed in the center to feed the four sub-cavities.Due to the symmetry of the structure,the antenna realizes two beams that are completely mirror symmetrical with respect to the broadside direction.And when the frequency is changing,the maximum radiation direction changes about 2°,which shows good stability.The measured results show that an impedance bandwidth of 16.6%(14.9~17.6 GHz)is achieved,and the maximum gain is 7.6 dBi.The gain fluctuation is less than 0.7 dB in the operating frequency band.

关 键 词：背腔缝隙天线 双波束天线 基片集成波导 

分 类 号：TN82[电子电信—信息与通信工程]