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.
出处
《物理学报》
SCIE
EI
CAS
CSCD
北大核心
2010年第12期8591-8596,共6页
Acta Physica Sinica
关键词
高功率微波
耦合输出
空间滤波器
双工器
high power microwave
coupling output
spatial filter
diplexer
