摘要
针对带有凸面结构屏蔽腔体的特点,采用扩展的传输线方法理论,建立了平面波照射下腔体屏蔽效能的等效电路模型,推导了近似计算解析式,并计算分析了凸面结构对电场屏蔽效能的影响。结果表明:凸面结构使得腔体第一谐振频率发生偏移。当信号频率高于腔体谐振频率时,凸面结构越高、跨度越大、距离开孔面越远对电场屏蔽效能影响也越大。分析结果与CST仿真结果进行了对比,证实本文采用的基于扩展传输线法的等效电路模型对问题研究的有效性。
The electric field shielding effectiveness(SE) of the heterotypic enclosure with apertures is investigated by using the adjusted transmission line method(TLM). The electric shielding effectiveness is calculated as a function of the convexity structure height, span and the distance to the apertured face. It is shown as that the convexity structure deviates the resonance frequency of the cavity. When the interference signal frequency is greater than the resonance frequency of the cavity, the influence of convexity structure on shielding effectiveness will be enhanced as rising of the height, span and distance between the apertured face and the convexity structure. Results of adjusted TLM are in good agreement with the CST simulation results.
出处
《电工技术学报》
EI
CSCD
北大核心
2014年第5期228-232,238,共6页
Transactions of China Electrotechnical Society
基金
国家自然科学基金资助项目(61372050
61250008)
关键词
屏蔽效能
传输线方法
电磁兼容
波导管
Shielding effectiveness,transmission line method,electromagnetic compatibility,waveguide
