【作者】 张志鹏； 张兴康； 袁兴阳； 张文海； 刘学观； 陈志兴； 赵智豪； 谭锦荣；

【Author】 Zhang Zhipeng;Zhang Xinkang;Yuan Xingyang;Zhang Wenhai;Liu Xueguan;Chen Zhixing;Chi-Hou Chio;Kam-Weng Tam;School of Electronic and Information Engineering,Soochow University;Fuyao Glass Industry Group Co.,Ltd;Faculty of Science and Technology,University of Macau;

【机构】 苏州大学电子信息学院； 福耀玻璃工业集团股份有限公司； 澳门大学科技学院；

【摘要】 本文设计了一款基于共面波导(CPW)馈电的圆极化缝隙天线,用于车载导航系统(GNSS L1频段,1.575GHz)。天线采用玻璃-PVB-玻璃多层介质基板结构,重点研究了汽车车顶玻璃尺寸变化对其辐射方向图的影响。仿真结果表明,当玻璃基板尺寸增大时,表面波效应在玻璃尺寸增大方向被显著激发,导致该方向增益提升,而边射方向增益明显降低。当介质板边长从100mm递增至1300mm时,xoz平面θ=0°处增益由2.1dB降至0.4dB,0=-90°处增益由-4.6dB增至1.4dB,0=90°处增益由-10.3dB增至-4.9dB;yoz平面θ=0°处增益由2.1dB降至0.4dB,0=-90°处增益变化不明显,0=90°处增益由-3.6dB增至1.5dB。这一现象揭示了玻璃尺寸与天线方向性的强关联性,对智能网联汽车的天线-玻璃一体化设计具有重要参考价值。更多还原

【Abstract】 This paper presents a circularly polarized slot antenna fed by a coplanar waveguide(CPW) for vehicular navigation systems(GNSS L1 band,1.575 GHz).The antenna employs a glass-PVB-glass multilayer substrate structure,and the impact of varying automotive roof glass dimensions on its radiation patterns is investigated.Simulation results demonstrate that as the glass substrate size increases,surface wave effects become notably along the dimension-expanding direction,resulting in gain enhancement in the extension direction while causing significant gain reduction in the broadside direction.As the substrate size increases from 100 mm to 1300 mm:In the xoz plane,the gain decreases from 2.1 dB to 0.4 dB at θ=0°,but it increases from-4.6 dB to 1.4 dB at θ=-90° and-10.3 dB to-4.9 dB at θ=90°.In the yoz plane,the gain decreases from 2.1 dB to 0.4 dB at θ=0°and increases from-3.6 dB to 1.5 dB at θ=90°.There is a negligible effect on the gain at θ=-90°.This phenomenon reveals the strong correlation between glass dimensions and antenna directivity,providing valuable insights for antenna-glass integrated design in intelligent connected vehicles.更多还原