论文部分内容阅读
引言对S波段窄带船舶雷达天线的平行板线/圆极化器的初步研究,产生了某些意外的和令人感兴趣的天线问题。极化器的设计目标是波束峰值上极化轴比小于1分贝,而过去对三种极化器结构进行实验后所得到的最好的轴比大约为3分贝。除轴比性能不好之外,天线辐射方向图在水平面上呈现高极化电平的不规则副瓣,该副瓣在从法线到口径面约75°的位置上。本文讨论了极化器的设计考虑,给出了天线加与不加极化器时的测试结果,并对可能使极化
INTRODUCTION A preliminary study of parallel plate / circular polarizers for S-band narrowband marine radar antennas has resulted in some unexpected and interesting antenna issues. The polarizer is designed to have a polarization axis ratio of less than 1 dB at the beam peak, compared to approximately 3 dB for the three polarizer structures tested in the past. In addition to poor performance of the axial ratio, the antenna radiation pattern in the horizontal plane shows high polarization level of the irregular sidelobe, the sidelobe in the normal to the caliber of about 75 ° position. This article discusses the polarizer design considerations, gives the antenna with and without the polarizer test results, and may make the polarization