截止波导管在腔体屏蔽中的应用研究  

Application Research of Cut off Waveguide in the Shielding Cavity

作　　者：刘志坚[1] 涂志章 罗灵琳[1] 陈潇雅 王畅 LIU Zhijian;TU Zhizhang;LUO Linglin;CHEN Xiaoya;WANG Chang(Faculty of Electrical Power Engineering,Kunming University of Science and Technology,Kunming 650500,China;Anhui Jinzhai Pumped Storage Co.,Ltd.,Lu’an 237300,China)

机构地区：[1]昆明理工大学电力工程学院,云南昆明650500 [2]安徽金寨抽水蓄能有限公司,安徽六安237300

出　　处：《电力科学与工程》2021年第2期73-78,共6页Electric Power Science and Engineering

摘　　要：依据波导管的高通滤波性能,设计了一种带有波导管结构的金属屏蔽腔体。采用HFSS有限元仿真软件,分别仿真了矩形孔和加了一段矩形波导管的腔体模型,分析了在1.0~2.0 GHz频率范围内屏蔽效能和电磁场强度变化。并进一步研究了平面波不同极化方向以及波导管长度对腔体屏蔽效能的影响,得出E0沿Y轴(沿短边)极化整体屏蔽效能最好,波导管长度与腔体屏蔽效呈正相关。研究结果表明,加装波导管能够提高带孔腔体的屏蔽效能,在波导长度为6 mm时,金属腔体截止频率从原有1.16 GHz提高至1.5 GHz,并且腔体谐振频率明显减小、谐振次数也相对减少。Based on the high pass filter performance of waveguide,a metal shielding enclosure with waveguide structure is designed.The HFSS finite element simulation software is used to simulate the rectangular holes and cavity models with a section of rectangular waveguide respectively,and analyzes their shielding effectiveness and electromagnetic field strength changes in the frequency range of 1.0~2.0 GHz.Furthermore,the effects of different polarization directions of plane wave and waveguide length on the shielding effectiveness of the cavity are studied,and it is found that E0 polarization along the Y axis(along the short side)has the best overall shielding effectiveness,and the waveguide length is positively correlated with the cavity shielding effectiveness.The results show that the shielding effectiveness of the cavity with holes can be improved by adding waveguide.When the waveguide length is 6mm,the cut-off frequency of the metal cavity is increased from 1.16 GHz to 1.5 GHz;the resonant frequency of the cavity is obviously reduced, and the resonant times is relatively reduced as well.

关 键 词：波导管 屏蔽效能 截止频率 腔体谐振 

分 类 号：TM15[电气工程—电工理论与新技术]