X波段宽带宽角扫描相控阵天线的设计

Design of X-band Wide-angle Scanning Phased Array Atenna

设计了一种X波段宽带宽角扫描相控阵雷达系统的小型阵列天线,该天线采用Vivaldi天线做为阵列单元。在考虑阵列单元间的互耦效应下,仿真设计了9×9小型阵列天线,使该阵列天线在相对带宽达40%下的有源驻波系数小于2,其有源单元方向图E面、H面的波瓣宽度分别达到120°、110°以上。对9×9天线阵的实物进行了加工与测试,测试结果说明了该阵列天线具有良好的宽带宽角扫描特性。因该天线结构简单,重量轻,在相控阵雷达天线中有很大的应用价值。

An X-band wide-band wide-angle scanning phased array radar antenna is designed, and Vivaldi antenna is used as the element of the array . Considering the mutual coupling effect between array units, 9×9 array is simulated and analyzed. Working in a bandwidth of 40 %, active VSWR of the array is less than 2, and satisfies a symmetric pattern with 3 dB beam width better than 120° and 110° in the E-plane and H-plane, respectively. A 9×9 array antenna is fabricated and measured, the test result shows that the antenna array has a good characteristic of Wide-band wide-angle scanning. Because of the simple structure and light weight, the array has a great application value in phased array.