摘要
分析了有孔屏蔽腔的屏蔽效能,将传统的等效传输线分析模型扩展为包含TEmn和TMmn高次模的模型,并用该模型分析了缝隙偏离腔体壁中心的情况,得到了实用性较强的一般公式,该公式将腔体内部的高次模和腔体壁的损耗都考虑在内,在一定程度上消除了频率和腔体尺寸对于以往公式的限制。与其他运用传输线高次模分析腔体屏蔽效能的文献不同,本文中TEmn和TMmn的m和n可为任意值,而不需要采用n=0的假设,这更与腔体中的多种模式相符合。
Shielding effectiveness of enclosure with off-center aperture was investi gated. The new model included high-order modes of enclosure. A general formula was proposed, which took high-order modes of enclosure and loss of enclosure wall into account. It greatly removed limitation of frequency and enclosure dimension. Different from other papers using high-order modes to analyze shielding effectiveness of enclosure, m and n of TEnm and TMnm. mode in this paper could be arbitrary. Assumption of n=0 was not necessary. It matched modes distribution in enclosure.
出处
《电波科学学报》
EI
CSCD
北大核心
2009年第3期510-513,共4页
Chinese Journal of Radio Science
基金
高科技发展计划项目(No.2007AA01Z281)
关键词
腔体
缝隙
屏蔽效能
偏离中心
高次模
enclosure
aperture
shielding effectiveness
off-center
high-order mode
