基于有源匹配技术的EMC测试天线设计与实现  

Design and Implementation of EMC Test Antenna Based on ActiveMatching Technology

作　　者：陈嘉兴 张新林 姜博 张嘉海 黄星 秦阳榛 路宏敏[1] CHEN Jiaxing;ZHANG Xinlin;JIANG Bo;ZHANG Jiahai;HUANG Xing;QIN Yangzhen;LU Hongmin(School of Electronic Engineering,Xidian University,Xi′an 710071,China)

机构地区：[1]西安电子科技大学电子工程学院,陕西西安710071

出　　处：《电子科技》2024年第9期72-78,共7页Electronic Science and Technology

基　　金：武器装备预研基金(JZX7X201901JY0048)。

摘　　要：针对低频段无源小型化EMC(Electromagnetic Compatibility)测试天线多为电小天线导致的天线系数高以及测试灵敏度低的问题,文中基于有源匹配技术分别对加载负阻变换电路和场效应管高阻输入电路的电小天线进行仿真分析。结果表明,场效应管高阻输入电路在降低天线系数和电路稳定性方面均优于负阻变换电路,有助于EMC测试天线的小型化设计和实现。加载场效应管高阻输入匹配电路的小型化EMC测试天线的测试结果表明,在2~30 MHz频带内,与未加载场效应管高阻输入匹配电路的EMC测试天线相比,该天线系数改善可达22~46 dB。In low frequency band,miniaturized EMC(Electromagnetic Compatibility)test antennas are mostly electrically small antennas,which have the problems of high antenna factor and low test sensitivity.To solve the problem,based on active matching technology,the electrically small antennas loaded with negative impedance converter circuit and field effect transistor high-impedance input circuit are simulated and analyzed respectively.The simulation results show that the field effect transistor high-impedance input circuit has advantages over the negative impedance converter circuit in the ability of reducing antenna factor and the stability of circuit,and is helpful to the design and implementation of miniaturized EMC test antenna.The test results of the miniaturized EMC test antenna loaded with field effect transistor high-impedance input matching circuit show that,in 2~30 MHz,antenna factor can be improved by 22~46 dB compared with the EMC test antenna without matching circuit.

关 键 词：有源匹配 天线系数 电磁兼容测试天线 电小天线 负阻变化电路 场效应管 电路仿真 天线系数校准 

分 类 号：TN82[电子电信—信息与通信工程]