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To describe the shielding ability of materials accurately and comprehensively,the frequency-domain and time-domain shielding effectiveness(SE) of material is investigated.The relevance between them was analyzed based on the minimum phase method,and the time-domain SE can be derived from frequency-domain SE.The SE of an energy selective surface(ESS) made of a novel material is investigated,and the relationship between SE and radiation field intensity are analyzed.The results show that not only material,but also the intensity of radiation electric field shows influence on SE in its frequency; for some materials,the dependence of SE on radiation electric field intensity needs to be considered.Therefore,it is necessary to research on the SE of shielding material in high-intensity electromagnetic environment.
To describe the shielding ability of materials accurately and comprehensively, the frequency-domain and time-domain shielding effectiveness (SE) of material is investigated. The relevance between them was analyzed based on the minimum phase method, and the time-domain SE can be derived from frequency-domain SE. The SE of an energy selective surface (ESS) made of a novel material is investigated, and the relationship between SE and radiation field intensity are. The results show that not only material but also the intensity of radiation electric field shows influence on SE in its frequency; for some materials, the dependence of SE on radiation electric field intensity needs to be considered.Therefore, it is necessary to research on the SE of shielding material in high-intensity electromagnetic environment.