摘要
为解决工程中超小型、高屏效金属盒体的屏蔽效能测量问题,测试天线必须具备尺寸小、频带宽以及辐射强度高的特点。使用HFSS对天线尺寸参数进行优选,采用双锥和套筒结构分别覆盖100 MHz^2 GHz和2~5 GHz两个频段,由该天线所构成的测试系统的动态范围比早期的球形偶极子天线提高了50 dB左右。最后对3种不同的机箱状态在半电波暗室中进行了屏蔽效能测试,试验获得的数据为今后的机箱屏蔽设计提供了依据。
In order to solve the shielding performance of microminiature metallic cabinets,the antenna should be have with minimized size, broad band and high eradiation ability. In this paper, HFSS from Ansoft software corporation is used to design and optimize the antenna,then the biconical and the cylinder shaped antenna are chosen to cover the band from 100 MHz~2 GHz and the band from 2~5 GHz. The measuring system composed of the new antennas expand its dynamic speciality 50dB more than the spherical dipole antenna used before. At last,3 instances of different chassis are tested in the EMC laboratory, the data obtained provide some valuable gist for future design of chassis of embedded aerospace computer.
出处
《现代电子技术》
2008年第16期147-149,153,共4页
Modern Electronics Technique
关键词
超小型
机箱
屏蔽效能
宽带天线
microminiature
cabinet
shielding performance
broad band antenna