建筑物墙壁电磁耦合截面建模及应用

电磁波照射下的建筑物室内电磁环境具有混响效果，因此可采用功率平衡法（PWB）快速评估室内电磁环境水平。然而目前PWB方法中电大腔壁耦合截面（CCS）的计算模型建立在腔内电磁波不穿透腔壁的条件下，无法直接用于电磁波可穿透室内建筑物墙壁的耦合截面计算。为此，提出了一种适用于电磁波穿透有限厚度建筑物墙壁的CCS计算新模型。该模型考虑实际建筑物墙体的厚度和材料电磁特性，能够充分反映电磁波因有限厚度墙壁多次反射对室内电磁环境水平的影响。将该模型应用于室内电场水平的快速评估，预测结果与实际测量结果吻合较好，证明了所提有限厚度建筑物墙壁CCS模型的合理性。

Modeling and application of electromagnetic coupling cross section of building walls

The electromagnetic waves radiating inside a building can cause reverberation effect, which can be evaluated using power balance method (PWB) to quickly determine the field level of indoor electromagnetic environment. However, the current calculation models of wall coupling cross section (CCS) in PWB method for electricallally large enclosure are based on the assumption that electromagnetic waves cannot penetrate through the enclosure walls. As a result, these models are not applicable for calculating the CCS of penetrable indoor building walls. To address this issue, a novel CCS model applicable for building walls with finite thickness is presented. The proposed CCS model considers the thickness and electromagnetic characteristics of building walls and can effectively reflect the effects of electromagnetic wave’s multiple reflections inside the walls on the indoor electromagnetic environment. The proposed model has been employed to estimate the indoor electric field level. The predicted results agree with the measurements, which validates the proposed CCS model for building walls with finite thickness.