摘要由于任何设备处于通风、散热等原因必定会有孔缝的存在，所以它成为了高功率微波武器攻击电子设备的有效途径，而本文旨在对接收机孔缝后门耦合进行仿真分析，这方面的研究是很有必要也很有意义的。本文利用电磁仿真软件CST结合电磁兼容知识，对接收机孔缝后门耦合进行仿真分析，通过考察不同中心频率，不同孔缝形状、结构、大小和不同极化入射波对后门耦合的影响，得到机箱内部的时域电场波形，然后观测机箱各处不同频点的电场响应得到该机箱的屏蔽效能，并分析其耦合规律。研究结果对金属腔体的电磁兼容设计有一定的指导意义。80410

毕业论文关键词：  孔缝  电磁兼容  后门耦合  屏蔽效能

毕业设计说明书外文摘要

Title    The Modeling and Simulation Analysis of the Backdoor

 Coupling of the Receiver Aperture                   

Abstract

For the reason that any equipment needs to ventilate and dissipate heat, there must be apertures in them, which can be an effective way of high power microwave weapons against electronic devices。 Meanwhile， this paper is aiming at the simulation analysis of backdoor coupling of the receiver aperture, the research of which is both necessary and significant。 By the measure of the electromagnetic simulation software CST combined with the knowledge of EMC, this paper simulates and analyze the backdoor coupling of the receiver aperture。 It gets the waveform of the time domain electric field in the enclosure through the study of different frequencies, different apertures’ shapes, structures, sizes and different polarization of the wave on the effect of the backdoor coupling。 It attains the shielding effectiveness of the enclosure by observing the electric field response of the different frequency points in the enclosure and analyze the coupling law。 The results have certain directive significance to the design of the electromagnetic compatibility of the metal enclosure。 

Keywords: aperture; electromagnetic compatibility; backdoor coupling; shielding effectiveness

目   录

1  引言 1

1。1  研究工作背景 1

1。2  国内外研究历史及现状 1

1。3 本文研究工作和内容 3

2  知识背景与软件介绍 4

2。1 电磁兼容 4

2。1。1  屏蔽分类 4

2。1。2  屏蔽效能计算 4

2。1。3  屏蔽效能的基本计算方式 4

2。1。4  孔缝对屏蔽效能的影响 5

2。2 CST仿真软件简介 5

3  CST建模仿真操作 7

3。1 建模 7

3。1。1  矩形及方形孔缝 7

3。1。2  圆形孔缝 8

3。1。3  三角形孔缝 8

3。1。3 其他孔缝 9

3。2仿真 9

3。3仿真变量分析 10

4 后门孔缝耦合仿真分析 11

4。1  不同中心频率的后门耦合 12