一种低剖面宽带宽角扫描阵列天线的设计

摘要

基于超材料技术理念,在考虑阵元间互耦效应下,优化设计了一种低剖面宽带宽角扫描阵列天线,使该阵列剖面为最低工作频率的四分之一波长,相对带宽达55%下,工作频段内中心阵元的平均工作效率高达87%以上,30º扫描角范围内的平均有源驻波系数小于2.0,其阵元方向图E面、H面的半功率波瓣宽度大于60º。研制的6伊8阵列样机测试结果说明了阵列天线具有良好的宽带宽角扫描特性,同时该天线具有结构紧凑、重量轻和易于实现的特点,在相控阵雷达天线中有很大的应用价值。%Considering the mutual coupling effect between array units, a low ( 1/4 λL ) profile wide-band wide-angle scanning phased array radar antenna is designed based on meta-materi-als. Working in a bandwidth of 55%,average efficiency and active VSWR of the array are more than 87% and less than 2. 0 respectively,and a symmetric pattern with 3 dB beam width is better than 60o in the E/H-plane. A 6í8 array antenna is fabricated and measured, the test result shows that the antenna array has a good characteristic of wide-band wide-angle scanning. Bene-fiting from the simple structure, light weight and facility fabricating,the array has a great appli-cation value in phased array.