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微带线电路板端口对入射电磁波的电压响应
引用本文:范颖鹏,杜正伟,龚克,张肃.微带线电路板端口对入射电磁波的电压响应[J].强激光与粒子束,2005,17(3):422-426.
作者姓名:范颖鹏  杜正伟  龚克  张肃
作者单位:清华大学,微波与数字通信技术国家重点实验室,北京,100084;清华大学,微波与数字通信技术国家重点实验室,北京,100084;清华大学,微波与数字通信技术国家重点实验室,北京,100084;清华大学,微波与数字通信技术国家重点实验室,北京,100084
基金项目:国家863计划项目资助课题
摘    要: 在考虑电磁波与电子设备的耦合时,屏蔽腔中电路板端口对入射电磁波的电压响应是一个重要的参数。分别计算了微带线电路板端口在自由空间和在屏蔽腔内这两种不同情况下的电压响应,以及屏蔽腔内耦合系数的变化。对所得结果进行了比较分析,结果表明,在自由空间时,响应电压频谱为连续的变化,而在屏蔽腔内时,只有在本征模的频率处才会激励起端口电压,频谱分布变为分立的。当屏蔽腔上开有窄缝时,窄缝方向和入射场极化方向对激励起来的端口电压都有影响,而电场极化方向和微带线方向之间的关系,是决定端口激励电压大小的关键因素。

关 键 词:屏蔽腔  电路板  耦合  电压响应
文章编号:1001-4322(2005)03-0422-05
收稿时间:2004/8/3
修稿时间:2004年8月3日

Coupling of external electromagnetic field to printed circuit board trace
FAN Ying-peng,DU Zheng-wei,GONG ke,ZHANG Su.Coupling of external electromagnetic field to printed circuit board trace[J].High Power Laser and Particle Beams,2005,17(3):422-426.
Authors:FAN Ying-peng  DU Zheng-wei  GONG ke  ZHANG Su
Institution:State Key Laboratory on Microwave and Digital Communications, Tsinghua University, Beijing 100084, China
Abstract:The voltage response of a printed circuit board (PCB) in a metallic shielding enclosure excited by an external electromagnetic field is an important factor when considering the coupling of an external electromagnetic field to electronic systems. In this paper, the voltage response of PCB excited by an external source is calculated under two conditions: in free space and in the shielding enclosure. The frequency spectrum of voltage is calculated. When the PCB is put into the cavity with a long slot, some cases are considered including different electric field directions of incident source and different slot shapes. The variance of coupling coefficient is also calculated.
Keywords:Shielding enclosure  PCB  Coupling  Voltage response
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