用于车载测高雷达的阵列天线设计  

Design of Array Antenna for Vehicular Height Finding Radar

作　　者：吴斌 姜兴[1] 廖欣[1] 李晓峰[1] WU Bin;JIANG Xing;LIAO Xin;LI Xiaofeng(Guilin University of Electronic Technology, Guilin, Guangxi 541004)

机构地区：[1]桂林电子科技大学,广西桂林541004

出　　处：《火控雷达技术》2020年第2期84-88,共5页Fire Control Radar Technology

基　　金：广西科技厅广西重点研发项目(AB16380316)。

摘　　要：为避免车辆与涵洞、高架桥等目标相撞,本文设计了一款应用于24GHz车载测高防撞雷达的高增益、低副瓣一发两收微带阵列天线。该天线的收发线阵采用串馈方式,通过调节各贴片的阻抗,实现收发线阵各阵元激励幅值满足设计值;同时馈电网络采用切比雪夫天线综合法设计,有效地减小了馈线损耗并实现天线高增益、低副瓣的特性。实测与仿真结果基本吻合,该阵列天线在24~24.25 GHz的频带内,S11<-10 dB。在中心频率24.125 GHz处,8×12元发射天线与3×12元接收天线的方位面副瓣电平<-20 dB,且3 dB波束宽度均为10°左右,满足车载测高防撞雷达系统的设计需求。In order to avoid vehicles colliding with targets such as culverts and viaducts,an array antenna with one Transmitter and two receiver microstrip featuring high-gain and low sidelobe is proposed for a 24 GHz vehicle-mounted height finding and collision avoidance radar.The transmitting and receiving line array of the antenna adopts the series feed mode.By adjusting the impedance of each patch,the excitation amplitude of receiving and transmitting line array can meet the design requirement.At the same time,the feeding network adopted Chebyshev antenna method,which effectively reduces the feeder loss and realized the characteristics of high gain and low sidelobe of the antenna.The actual measurement basically agree with simulation results.The frequency band of the array antenna is 24 to 24.25 GHz,and S11<-10 dB.At the center frequency of 24.125 GHz,the azimuth side lobe levels of the 8×12 element transmitting antenna and the 3×12 element receiving antenna are less than-20 dB on AZ plane,and the 3 dB beam width is about 10°,which meets the vehicular height finding and collision avoidance radar system design requirements.

关 键 词：一发两收 切比雪夫 低副瓣 微带阵列天线 

分 类 号：TN957.2[电子电信—信号与信息处理]