基于SIW圆极化汽车雷达天线的设计-《集美大学学报（自然科学版）》

文章信息/Info

Title:: Design of Circularly Polarized Slot Antenna for Automotive Radar Antenna Based on SIW

Author(s):: MA Zhonghua; XING Haitao; CHEN Peng; (School of Information Engineering，Jimei University，Xiamen 361021，China)

Keywords:: axial ratio; circularly polarized; high frequency structure simulator(HFSS); resonator; substrate integrate waveguide (SIW)

摘要:: 在设计汽车雷达系统天线时，为实现其K波段天线圆极化特性，提出了在基片集成波导顶层开交叉缝隙的结构，并采用金属柱加扰的方法展宽了天线的工作频带。使用三维电磁仿真软件HFSS在罗杰斯介质板Rogers 5880上进行设计优化，得到4个交叉缝隙阵元的圆极化SIW缝隙天线。仿真结果显示：其轴比小于3 dB的带宽为370 MHz，在24.15 GHz频点上天线增益为8.6 dBi，在24.00～24.25 GHz频率范围内，电压驻波比小于1.5。

Abstract:: In order to realize the circularly polarized characteristic of antenna in K band as designing the antenna of automotive radar，this paper proposedthe X cross slot structure on the top of substrate integrated waveguide (SIW) and perturbations of metallic post is applied in the SIW cavity for the purpose of broadening the operation frequency band.This structure is optimized by HFSS simulation software on the Rogers 5880 substrate board to obtain the four cross slot array elements of circularly polarized SIW antenna.The simulation results indicate that the bandwidth is 370 MHz as the axial ratio is less than 3 dB;the gain of antenna is 8.6 dBi on the 24.15 GHz frequency point;and the VSWR is less than 1.5 within the bandwidth range of 24.00 GHz to 24.25 GHz.