建筑物墙壁电磁耦合截面建模及应用

贺志涵; 洪居亭; 闫丽萍; 赵翔

doi:10.11884/HPLPB202335.230006

建筑物墙壁电磁耦合截面建模及应用

doi: 10.11884/HPLPB202335.230006

四川大学电子信息学院，成都 610065

基金项目: 国家自然科学基金项目(61877041); 国家自然科学基金区域创新发展联合基金项目(U22A2015)

详细信息

作者简介:
贺志涵，2063735652@qq.com

通讯作者:
闫丽萍， liping_yan@scu.edu.cn

中图分类号: TN911
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- 文章访问数: 331
- HTML全文浏览量: 146
- PDF下载量: 65
- 被引次数: 0
出版历程
- 收稿日期: 2023-01-10
- 修回日期: 2023-03-20
- 录用日期: 2023-03-20
- 网络出版日期: 2023-03-22
- 刊出日期: 2023-04-07

Modeling and application of electromagnetic coupling cross section of building walls

College of Electronic and Information Engineering, Sichuan University, Chengdu 610065, China

摘要

摘要: 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。
- 功率平衡法 /
- 室内电磁环境 /
- 墙壁材质 /
- 墙壁耦合截面 /
- 品质因数
Abstract: 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.
- power balance method /
- indoor electromagnetic environment /
- wall material /
- wall coupling cross section /
- quality factor

HTML全文

图 1 电磁波入射墙壁简化模型

Figure 1. Simplified model of EM wave incident wall

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图 2 电磁波垂直入射到有限厚度混凝土的透射系数

Figure 2. Normal incident transmission coefficient of electromagnetic wave impinging upon concrete

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图 3 电磁波斜入射到厚度为d = 150 mm混凝土(No.19)墙壁时的透射和反射系数

Figure 3. Transmission and reflection coefficients of electromagnetic wave impinging upon concrete (No.19) with thickness of d = 150 mm

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图 4 垂直入射时反射系数和透射系数随频率的变化 (d = 150 mm)

Figure 4. Normal incident reflection coefficient and transmission coefficient with respect to frequency (d = 150 mm)

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图 5 归一化CCS随电导率的变化

Figure 5. Normalized CCS with respect to electrical conductivity

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图 6 文献[3]与理论CCS对比

Figure 6. Literature [3] versus theoretical CCS

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图 7 实验测量场景与电场探头

Figure 7. Experimental system

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图 8 实测和理论对比

Figure 8. Measured and theoretical results comparison

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表 1 材料序列号

Table 1. Material serial number

No.	material	d/mm	No.	material	d/mm
1	plexiglass	6, 10, 12	2	PP	−
3	teflon	−	4	polystyrene	−
5	pine wood	−	6	hardboard	−
7	5-ply plywood	−	8	MDF	2−30
9	MDF with gray veneer	2−30	10	MDF with brown veneer	2−30
11	chipboard	−	12	chipboard with veneer	−
13	glass	6, 10, 12	14	wood-cement board	−
15	gypsum plaster	−	16	plasterboard	6, 8, 9, 12, 14, 16, 18
17	red brick	120, 240, 370, 490	18	yellow brick	120, 240, 370, 490
19	concrete with small gravel	75, 100, 150; 160, 180, 200	20	concrete with large gravel	75, 100, 150; 160, 180, 200

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表 2 常见建筑材料归一化耦合截面计算

Table 2. Normalized CCS calculation for common building materials

material	d/mm	WCCS/m²	TCCS/m²	WCCS/m²	TCCS/m²	WCCS/m²	TCCS/m²	Ref [5] CCS/m²
material	d/mm	2.4 GHz		5.5 GHz		27 GHz		Ref [5] CCS/m²
plexiglass	6～12	0.001～0.002	0.214～0.185	0.002～0.004	0.181～0.211	0.012～0.021	0.215～0.187	0.223
glass	6～12	0.001～0.001	0.150～0.120	0.002～0.009	0.122～0.178	0.062～0.084	0.138～0.088	0.194
plasterboard	6～18	0.009～0.016	0.210～0.169	0.013～0.041	0.177～0.179	0.054～0.117	0.176～0.105	0.224
red brick	120～490	0.007～0.025	0.196～0.178	0.026～0.084	0.183～0.128	0.201～0.219	0.018～0.000	0.219
concrete with small gravel	75～200	0.013～0.039	0.163～0.170	0.047～0.099	0.158～0.111	0.209～0.215	0.006～0.000	0.215
concrete with large gravel	75～200	0.016～0.048	0.144～0.145	0.057～0.117	0.142～0.089	0.205～0.210	0.005～0.000	0.210

下载: 导出CSV

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