一种串馈的非规则天线阵  

A series-fed irregular array

作　　者：丁卓富[1] 肖绍球[1] DING Zhuofu;XIAO Shaoqiu(University of Electronic Science and Technology of China,Chengdu 610054,China)

机构地区：[1]电子科技大学,成都610054

出　　处：《电波科学学报》2018年第4期392-396,共5页Chinese Journal of Radio Science

基　　金：国家自然科学基金(61731005);预先研究项目(41413060404)

摘　　要：均匀规则阵列天线的副瓣电平较差,且波束宽度较宽,不太适合于一维高精度相控阵雷达系统.针对这些要求,提出了一种基于串联馈电网络结构的非规则天线阵列.该阵列采用串馈方式,结合带空腔的微波多层板技术,通过带状线缝隙耦合方式,避免了背向辐射,同时获得宽带特性.该阵列采用遗传算法对阵列进行优化,获得低于-18dB的理论副瓣电平,同时相比均匀规则阵而言,波束宽度仅有0.2°的拓宽.对于20°的波束宽度而言,该波束宽度扩宽量可以忽略不计.该阵列的实测2:1驻波带宽为19.8%,方向图带宽为12.2%,在方向图带宽内,阵列的实测副瓣电平低于-16dB,阵列的带内测试增益高于11.7dBi,实测结果和理论设计相吻合,表明该天线阵列适用于一维相控阵天线.The uniform regular array antenna has poor sidelobe level and wide beamwidth, which is not suitable for demanding one-dimensional phased array radar systems. In response to these require ments, an irregular antenna array based on a series-fed network structure is proposed in this paper. The array takes a series feed method, combined with a microwave multilayer board technology with a hollow cavity, to avoid back radiation and obtain broadband characteristics simultaneously through a stripline slot coupling method. The array is optimized using a genetic algorithm to obtain a theoretical side lobe level be low 18 dB. Compared to a uniform regular array, the beam width is only 0.2° widened. Compared with the beam width of 20 degree, the beam width extension can be ignored. The measured 2：1 standing wave bandwidth of the array is 19.8%, and the pattern bandwidth is 12.2%. Within the bandwidth of the pat tern, the measured sidelobe level of the array is lower than -16 dB, and the measured gain of the array is higher than 11.7 dBi. The measured results show that the array is suitable for the application of one di mensional phased array.

关 键 词：串馈 非规则天线阵 低副瓣 宽带 介质空腔 

分 类 号：TN821.91[电子电信—信息与通信工程]