CAJ | 학술논문

针对空间场强电磁防护中带外滤波—带内限幅的需求，研究了能量—频率选择表面级联复合的防护方法，设计出一种典型的防护结构，通过时域有限差分对防护结构进行了稳态和瞬态分析，尤其是不同情况下频率选择表面与能量选择表面的相互耦合。计算结果表明：该防护结构对通带内正常信号的传输衰减小于1.55 dB，强电磁脉冲传输衰减大于20 dB，因而其既能阻止强电磁脉冲进入系统，又可有效抑制带外电磁干扰。
침대공간장강전자방호중대외려파—대내한폭적수구，연구료능량—빈솔선택표면급련복합적방호방법，설계출일충전형적방호결구，통과시역유한차분대방호결구진행료은태화순태분석，우기시불동정황하빈솔선택표면여능량선택표면적상호우합。계산결과표명：해방호결구대통대내정상신호적전수쇠감소우1.55 dB，강전자맥충전수쇠감대우20 dB，인이기기능조지강전자맥충진입계통，우가유효억제대외전자간우。
Considering the requirement of spatial electromagnetic protection in the case of high intensity field, the out-band filtering and the in-band limiting strategy is implemented through cascaded design with energy-frequency selective surfaces. To verify the method, a typical protection structure is designed. Using the finite different time domaln method, both the steady state and transient state are simulated. The cou?pling effect between the energy selective surface and frequency selective surface are analyzed. The results show that when a wave with low field intensity impinges, the insertion loss is reduced below 1.55 dB;when the high intensity field radiates, the transmission loss is reduced below 20 dB, which can protect the system agalnst intense electromagnetic interference effectively.