77 GHz汽车角雷达宽波束平坦增益阵列天线设计  

Design of 77 GHz automotive angular radar array antenna with wide beamwidth and flat gain

作　　者：姜兴[1] 祝雪龙 廖欣[1] 孙靖虎 杨明 吴斌 JIANG Xing;ZHU Xuelong;LIAO Xin;SUN Jinghu;YANG Ming;WU Bin(School of Information and Communication,Guilin University of Electronic Technology,Guilin 541004,China;Advanced R&D Department,Desay SV Intelligent Transportation Technology Research Institute Co.Ltd.,Huizhou 516000,China)

机构地区：[1]桂林电子科技大学信息与通信学院,桂林541004 [2]德赛西威智能交通技术研究院有限公司先期研发部,惠州516000

出　　处：《电波科学学报》2021年第1期43-48,共6页Chinese Journal of Radio Science

基　　金：国家自然科学基金(61761012);广西科技厅广西重点研发项目(AB16380316);广西重点实验室基金(GXKL06170109)。

摘　　要：设计了一款基于波束赋形技术的宽波束、平坦增益平面阵列天线,用于汽车角雷达系统.该阵列天线由三个1×10串馈线阵组成,串馈线阵采用单元不等间距分布的Dolph-Chebyshev天线综合法进行设计以降低副瓣.为了满足汽车角雷达宽视场角(field of view,FOV)的需求,对平面阵列天线采用波束赋形技术以展宽方位面的波束宽度并提高增益的平坦度.仿真与实测结果吻合较好,实测结果表明1×10线阵副瓣电平为−19.7 dB;3×10平面阵列天线的方位面3 dB波束宽度为106.4°,方位面增益平坦度可达−45°~45°,其最大增益为11.3 dBi.A wide beam,flat gain planar array antenna based on beamforming technology is designed for automotive angular radar systems.The array antenna consists of three 1×10 series feed line arrays,which are designed by Dolph-Chebyshev antenna synthesis method with unequal spacing distribution to reduce the side lobes.In order to satisfy the needs of the automotive angle radar wide field of view(FOV),the beamforming techniques are used for the planar array antenna to broaden the beamwidth of the azimuth plane and improve the flatness of the gain.The simulation and the measured results agree well.The measured results show that the 1×10 line array sidelobe level is−19.7 dB;the 3×10 planar array antenna has a 3 dB beamwidth of 106.4°,and the azimuth gain flatness range can reach±45°,the maximum gain is 11.3 dBi.

关 键 词：汽车角雷达 阵列天线 宽波束 平坦增益 

分 类 号：TN957.2[电子电信—信号与信息处理]