摘要
为了实现对建筑物内无线局域网(WLAN)的电磁屏蔽作用,文中将传统的十字单元结构进行曲折线设计,通过复合技术得到一种应用于无线局域网的新型双阻带频率选择表面(FSS),该表面电尺寸较小,约为0.16λ_(0)×0.16λ_(0)。然后,利用有限元法并采用ANSYS⁃HFSS电磁场仿真软件对所设计结构的频率响应特性进行分析。结果表明:所设计的频率选择表面具有较强的极化稳定性和角度稳定性,可以同时在无线局域网2.4 GHz和5 GHz频段范围内产生2.19~2.67 GHz和5.27~5.85 GHz两个传输禁带;且该结构在阻带范围内可以对入射电磁波产生约-70 dB的屏蔽作用,阻带范围外其他波段信号全部通过,该频率选择表面在电磁屏蔽、天线隔离、雷达隐身等领域具有较为广阔的应用前景。
In order to realize the electromagnetic shielding effects of WLAN in buildings,the traditional cross type unit is designed as a zigzag type,and a new dual stop⁃band frequency selection surface(FSS)applied to WLAN is obtained by means of composite technology,which has a small electrical size,about 0.16λ_(0)×0.16λ_(0).The finite element method and the ANSYS⁃HFSS electromagnetic simulation software are used to analyze and discuss the frequency response characteristics of the designed structure.The results show that the designed FSS has strong polarization stability and angle stability,and it can simultaneously generate 2.19~2.67 GHz and 5.27~5.85 GHz transmission bandgaps in the 2.4 GHz and 5 GHz frequency bands of WLAN.The structure can shield the incident electromagnetic wave by about-70 dB in the stopband range,and all signals in other bands outside the stopband range are allowed to pass.The FSS has broad application prospects in electromagnetic shielding,antenna isolation,radar stealth and other fields.
作者
李倩南
王青
张辉
武瑞青
LI Qiannan;WANG Qing;ZHANG Hui;WU Ruiqing(Xi’an Technological University,Xi’an 710021,China;Xidian University,Xi’an 710071,China;School of Physics and Electronic Engineering,Xianyang Normal University,Xianyang 712000,China;Middle School Affiliated to Xizang Minzu University,Xianyang 712000,China)
出处
《现代电子技术》
2022年第24期44-47,共4页
Modern Electronics Technique
