近几年来高功率微波（HPM）武器技术发展迅猛，其产生的强电磁脉冲环境能够对武器装备构成严重威胁，因此，研究武器装备的强电磁防护具有重要的意义。针对强电磁防护与信号收发兼容的“前门”防护难题进行研究，对能量选择强电磁防护机制进行分析。设计并仿真典型压控导电的单层能量选择表面和双层非对称的能量选择表面结构及其工作性能，对影响插入损耗和防护效能的参数进行研究。仿真结果表明：设计出的能量选择表面（ESS）结构在L波段具有很好的防护性能，透波模式传输损耗小于0.5 dB，防护模式屏蔽效能大于20 dB，具有能量低通特性，基本满足电子设备的“前门”防护需求，同时，双层非对称结构可以带来防护性能的改善。%The technology of high power microwave(HPM)weaponry has been developed dramatically in recent years,which poses a severe threat to the electronic equipment based on high power electromagnetic pulse. Thus,it is of crucial significance to study HPM protection. Particularly,both protection agalnst HPM and signal receiving and transmitting have long been a serious problem of“front door”protection for electronic equipment,and such a issue is solved in this paper by presenting and analyzing the energy selec⁃tive HPM protection mechanism. A typical energy selective surface(ESS)and a kind of double-layer un⁃symmetrical ESS are presented,with their working performance being simulated,where more research on parameters that may influence the insertion loss and shielding effectiveness of the ESS structure are con⁃ducted. The results show that the transition loss in the transmitting mode of ESS is below 0.5 dB,and the shielding effectiveness in the protecting mode is over 20 dB within L-band. Thus,the ESS structure is characterized as a low-energy-pass filter,which essentially satisfies the requirements of the“front door”protection of electronic equipment. Overall,the equipment's performance can be improved by the dou⁃ble-layer unsymmetrical structure design.
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