【作者】 王婧； 白明； 苗俊刚； 牛传峰； 杨国栋；

【Author】 Wang Jing;Bai Ming;Miao Jun-Gang;Niu Chuan-Feng;Yang Guo-Dong;School of Electronic and Information Engineering,Beijing University of Aeronautics and Astronautics;China Electronics Technology Group Corporation No.54 Research Institute;

【机构】 北京航空航天大学电子信息工程学院； 中国电子科技集团公司第五十四研究所；

【摘要】 折线圆极化器具有便于加工,可赋型等特性,可作为口径天线或馈源的罩式极化器,广泛应用于远程微波通信用天线系统。低耗双频带折线圆极化器对轴比、损耗和频率范围等有较高要求,本文针对K和Ka频段通信要求设计双频带折线圆极化器,应用等效电路对折线栅进行等效,并结合传输线理论进行逐层设计。以K和Ka频段内轴比与损耗为目标函数,使用电磁仿真软件优化4层折线栅圆极化器的结构参数,研究结构参数对圆极化器频率响应的影响,优化结果与测试结果较为吻合。所设计的圆极化器具有很好的使用价值。更多还原

【Abstract】 Meander-line circular polarizer has some characteristics such as simple machining technology and shape modifying,so it can be widely used in the remote microwave communication antenna system as polarizer of aperture antennas or feed source.Low-loss two-band meander-line polarizer has higher requirements on axial ratio,loss and frequency range.Based on such theories as transmission line and microwave equivalent circuits,this paper presents an optimization design for a four-sheet meander-line circular polarizer to meet the communication requirement of K and Ka band.Taking the axial ratio or loss over the specified band as the target function,the dimensions of four-sheet polarizer are optimized.Study on software simulation and test results is used to analyse the effects which caused by changing of circular polarizer’s structure parameters.The results of test compared to simulation data is reasonable.The method has a better practical value.更多还原