一种应用于雷达天线罩的新型极化变换器

A Novel Cicular Polarizer of Radar Technology in Radome

本文研究了一种工作在Ku和K波段应用于雷达天线罩的圆极化变换器,线-圆极化变换器通过在天线辐射前方添加多层极化变换层,可使天线辐射的线极化波转换为圆极化波,由此可实现雷达发射圆极化电磁波的目的.极化变换层工作原理是对入射电磁波的平行分量滞后垂直分量超前从而实现圆极化,其主要通过把印刷电路板上的金属层腐蚀成金属栅格线.与传统线-圆极化变换器相比,新型线-圆极化变换器能有效实现小型化,在军事上拥有实际应用价值.

This paper designs a novel circular polarizer working at Ku band or K band which is used to Radome. By adding multi-polarization-transformation-layer,circular polarizer can convert linear polarization waves into circular polarization waves,the goal of sending circular polarization waves can be reached. The principle of circular polarizer is that the incident waves go through the polarizer can make the parallel component of electric field backward and the perpendicular component advanced to get the circular polarization waves. And the circular polarizer is made by etching metallic meander-line on PCB. Comparing with traditional circular polarizer,the novel one can realize miniaturization effectively,and it has an excellent performance in military requirement.