应用集合射线投影法设计曲面频率选择表面  

Curved Frequency Selective Surface Design Using Set Ray Projection Method

作　　者：沈仁强 SHEN Renqiang(Southwest China Research Institute of Electronic Equipment,Chengdu 610036,China)

机构地区：[1]中国电子科技集团公司第二十九研究所,成都610036

出　　处：《电子信息对抗技术》2022年第5期84-90,共7页Electronic Information Warfare Technology

摘　　要：针对曲面频率选择表面(Frequency Selective Surface,FSS)在理论分析和建模仿真方面存在的难点,提出采用集合射线投影方法,将复杂曲面转换成平面进行等效分析和仿真。为验证方法的有效性,制作了毫米波双屏双曲面频率选择表面,用作卡塞格伦天线的副反射面,实现了抛物面天线与卡塞格伦天线的多频复用。该副反射面的传输性能测试表明,透射频段(20.2~21.2 GHz)的插入损耗小于0.8 dB,反射频段(30~31 GHz)的传输损耗优于20 dB,具有良好的传输特性。带FSS副反射面的天线增益与驻波测试结果表明,相比无FSS副反射面的抛物面天线,增益下降约0.5 dB;相比金属副反射面的卡塞格伦天线,增益下降约0.8 dB;电压驻波差异较小,频率复用反射面天线的性能良好。For the difficulties in theoretical analysis and modeling simulation of surface Frequency Selective Surface(FSS),a set ray projection method is proposed to convert complex surface into plane for equivalent analysis and simulation.To verify the validity of the method,a millimeter-wave double-screen hyperbolic frequency selective surface is made,which is used as the secondary reflector of the Cassegrain antenna,and the parabolic antenna is multiplexed with the Cassegrain antenna.The transmission performance test of the secondary reflector shows that the insertion loss of the transmission band(20.2~21.2 GHz)is less than 0.8 dB,and the transmission loss of the reflection band(30~31GHz)is greater than 20 dB,which has good transmission characteristics.The results of antenna gain and standing wave test with FSS secondary reflector show that the gain decreases by about 0.5 dB compared with parabolic antenna without FSS secondary reflector.Compared with the Cassegrain antenna with a metal secondary reflector,the gain decreases by about 0.8 dB.The voltage standing wave ratio difference is small,and the performance of frequency multiplexing reflector antenna is good.

关 键 词：集合射线投影 曲面频率选择表面 副反射面 卡塞格伦天线 多频复用 

分 类 号：TN821[电子电信—信息与通信工程]