用于车载测高雷达的圆极化阵列天线设计  

Design of circularly polarized array antenna for vehicle height-finding radar

作　　者：汪坤 廖欣[1] 姜兴[1] 袁亚超 杨明 WANG Kun;LIAO Xin;JIANG Xing;YUAN YaChao;YANG Ming(School of Information and Communication,Guilin University of Electronic Technology,Guilin 541004,China)

机构地区：[1]桂林电子科技大学信息与通信学院

出　　处：《桂林电子科技大学学报》2019年第2期113-118,共6页Journal of Guilin University of Electronic Technology

基　　金：广西科技厅重点研发项目(AB16380316)

摘　　要：为实现车辆对前方目标高度的探测,设计了一款用于24GHz车载测高防撞雷达的高增益、低副瓣一发两收圆极化微带阵列天线。该天线采用方形贴片切角的方式实现圆极化特性,同时采用道尔夫-切比雪夫综合算法设计串并联混合馈电网络,使该圆极化微带阵列天线实现高增益、低副瓣的特性。实测与仿真结果基本吻合,该圆极化阵列天线在24~24.25GHz频带,反射系数小于-12dB,轴比均小于3dB。在中心频率24.125GHz处,该10×4元发射天线与10×2元接收天线的增益分别为22.5dB和19.5dB,方位面旁瓣电小于-20dB,且3dB波束宽度均为9°左右,满足设计要求。In order to detect the target height in front of the vehicle, one transmitting and two receiving circularly polarized microstrip array antenna with high gain and low side lobe, which is applied to the 24 GHz automotive height measurement collision avoidance radar, is designed. The circular polarization characteristic of the antenna is realized by cutting angle on the square patch. By using the series-parallel hybrid feed network which is designed with the Dolph-Chebyshev synthesis algorithm, the high gain and low sidelobe characteristics are achieved. The measured results are in good agreement with the simulation results. The reflection coefficient and axial ratio of the circular polarization array antenna are less than -12 dB and 3 dB respectively in the frequency band of 24~24.25 GHz. At the center frequency of 24.125 GHz, the gain of the 10×4 element transmitting antenna and the 10×2 element receiving antenna are 22.5 dB and 19.5 dB, respectively. The azimuth side lobe is less than -20dB and the beam width of 3dB is about 9°, which meet the design requirements.

关 键 词：圆极化 高增益 低副瓣 微带天线 

分 类 号：TN828[电子电信—信息与通信工程]