摘要
鉴于汽车轮胎压力监测系统(TPMS)中发射天线在PCB板上走线的局限性,根据传统倒L型印刷天线的结构特点,微带线在介质基板上模仿蛇形天线的走线形式设计了一种433.92 MHz小型化蛇形印刷天线,利用弯折技术极大地减小了天线的结构尺寸,并使用加载匹配网络的方法改善了天线的阻抗特性。使用Ansoft HFSS 15.0仿真软件对天线加载的匹配网络中无源集总元件进行参数分析和优化,推导出天线加载的最佳无源集总元件的匹配值,并对天线的回波损耗、驻波比、天线阻抗和方向图进行了仿真测试。结果表明,优化后的天线在433.92 MHz谐振频点处的回波损耗为-21.64 dB,工作频段为432.84~435.00 MHz,并且具有良好的全向性,可应用在汽车轮胎压力监测系统之中。
As the transmission antenna routing has a limitation on PCB in TPMS,a 433.92 MHz miniaturized serpentine printed antenna is designed in this paper by simulating the serpentine antenna on the dielectric substrate and according to the structural characteristics of traditional inverted L type printed antenna,which greatly reduces the structure size of the antenna by using the bending technology.The impedance characteristics of the antenna are improved by loading a matching network.Ansoft HFSS 15.0 simulation software is used to analyze and optimize the parameters of the passive lumped elements in the matching network loaded by the antenna.The optimal matching value of the passive lumped elements loaded by the antenna is derived.The return loss,standing wave ratio,antenna impedance and directional diagram of the antenna were simulated.The results proves that the optimized antenna has a return loss of-21.64 dB at the resonance frequency of 433.92 MHz,and its effective working frequency range is 432.84~435.00 MHz,and it has good omnidirectional performance.Therefore,the antenna can be used in automobile tire pressure monitoring system.
作者
杨辉
凃玲英
丰励
帅亮
尹龙川
曾李
刘枢翰
YANG Hui;TU Lingying;FENG Li;SHUAI Liang;YIN Longchuan;ZENG Li;LIU Shuhan(School of Electrical and Electronic Engineering,Hubei University of Technology,Wuhan 430068,China;School of Economics and Management,Changsha University of Science and Technology,Changsha 410067,China)
出处
《现代电子技术》
北大核心
2020年第13期6-10,共5页
Modern Electronics Technique
基金
国家自然科学基金青年科学基金项目(41601399)。
关键词
小型化天线
蛇形印刷天线
回波损耗
天线阻抗匹配
参数优化
仿真结果分析
miniaturized antenna
serpentine printed antenna
return loss
antenna impedance matching
parameter optimization
simulation result analysis
