摘要
本文设计了一种用于车载通信的低剖面多频天线,分别工作在全球定位系统(GPS)、无线局域网(WLAN)和专用短程通信技术(DSRC)3个频段.通过采用中心馈电的圆形贴片,实现类单极子的辐射方式,获得低剖面特性.而且天线采用多层堆叠结构,通过加载耦合圆环和加入短路销钉,分别展宽了DSRC和WLAN频段的带宽.为了提高端口之间的隔离度,在GPS同轴馈电线上插入一个三阶巴特沃斯低通滤波器,并将滤波器设置在WLAN天线和接地板之间,使得两个端口之间隔离度达到17 dB以上.仿真和测试结果吻合良好,该天线在3个频段内有着良好的阻抗匹配和辐射方向图,且天线的垂直高度仅有4.8 mm,具有良好的低剖面特性,适用于车载系统.
A low-profile multi-frequency antenna for vehicular communication was designed in this paper.This antenna worked in three frequency bands which includes Global Positioning System(GPS),Wireless Local Area Networks(WLAN)and Dedicated Short Range Communication(DSRC).By adopting center-fed circular patch,the designed antenna had the low profile characteristic with monopole-like radiation pattern.Moreover,multi-layer stacking structure was adopted.By adding coupled annular ring and the shorting pat,the bandwidths of DSRC and WLAN were widened.In order to improve the isolation between the two ports,a third-order Butterworth low-pass filter(LPF)was inserted into the GPS coaxial feeder.The filter was placed between the WLAN antenna and the ground.So the isolation between the two ports was more than 17 dB.The measured results was identical with the simulated ones.The antenna has good impedance matching and radiation pattern in the three frequency bands.And the vertical height of the designed antenna was only 4.8 mm with low profile characteristic,which is suitable for vehicle-mounted systems.
作者
陈新伟
田洁
苏晋荣
CHEN Xinwei;TIAN Jie;SU Jinrong(College of Physics and Electronics Engineering, Shanxi University, Taiyuan 030006, China)
出处
《测试技术学报》
2022年第1期1-5,10,共6页
Journal of Test and Measurement Technology
基金
国家自然科学基金资助项目(62071282)。