一种高功率微波空间滤波器的设计与初步实验研究  

Preliminary investigation on the design and experiment of a spatial filter for dual band high power microwave

作　　者：李国林[1] 舒挺[1] 袁成卫[1] 张军[1] 靳振兴[1] 杨建华[1] 钟辉煌[1] 杨杰[1] 武大鹏[1] 

机构地区：[1]国防科学技术大学光电科学与工程学院,长沙410073

出　　处：《物理学报》2010年第12期8591-8596,共6页Acta Physica Sinica

摘　　要：研究了一种新型高功率微波空间滤波器(双工器),该空间滤波器通过放置在天线近场的周期性金属圆柱阵列实现线极化波的反射和透射.通过对比研究低功率条件下放置该双工器前后的辐射方向图,发现该双工器对S波段微波的反射效率达到96%,对X波段微波的透射效率达到97%,隔离度分别达到25dB以上,交叉耦合度在-25dB以下.在S/X波段各自注入1.5GW的高功率微波,脉冲宽度为100ns的条件下,放置双工器后没有发现明显的微波脉冲缩短现象.A spatial filter /diplexer for gigawatt level high power microwave is theoretically and experimentally investigated in this paper.The spatial filter consists of several cylindrical rods which are located in the near field of the applied radiating antenna.The S /X dual band microwaves are reflected and transmitted by the spatial filter in the same propagation directions.In the low power experiments,the transmitted and the reflected patterns are very close to that of the applied antenna.The measured reflection and transmission efficiencies,calculated from the power densities in the far-field region,are about 96% and 97% respectively.In addition,the spatial filter has the isolation level higher than 25 dB and the cross polar level much lower than-25 dB.Under the illumination by S /X band high power microwave with a pulse magnitude of about 1.5 GW and duration of about 100 ns,no microwave breakdown is observed.

关 键 词：高功率微波 耦合输出 空间滤波器 双工器 

分 类 号：TN713[电子电信—电路与系统]