摘要
传统77 GHz车载雷达天线难以在一副天线内同时满足中距和远距雷达探测需求,现有方案是配备两副分别支持中距和远距雷达探测的天线,利用开关在二者之间来回切换。这样不仅会占用更多版图面积,而且开关会引入一定的插入损耗,影响系统信噪比。本文提出了一种结构紧凑的中远距合一天线阵列,该天线具有“平肩膀”形状方向图,能够在一副天线内同时满足77 GHz中距雷达和远距雷达的探测要求。为提升中远距合一天线的设计效率,本文提出一种混合优化方法(包括非线性拟合与主动空间映射法)来综合“平肩膀”形状的辐射方向图。此外,本文基于基片集成波导技术设计了紧凑型馈电网络,能够在实现紧凑阵列布局的同时有效减少寄生辐射损耗。天线采用低成本单层印刷电路板工艺制造,实测结果表明,该天线在77 GHz中心频点处具有良好的“平肩膀”方向图和19.8 d Bi的峰值增益,是77 GHz车载雷达天线的优良选择。
It is difficult for conventional 77 GHz automotive radar antennas to cover the field of view for both medium-range radar and long-range radar simultaneously.The existing solution is to switch between two sets of antennas for medium-range and long-range radar,at the expense of a larger antenna footprint.Extra insertion loss will be introduced by the switch,which may influence the system signal-to-noise ratio.In this paper,a compact antenna array with a flat-shoulder shaped radiation pattern is presented,which enables simultaneous support for both medium-range and long-range radar application.In order to improve the design efficiency,a mixed optimization method,including non-linear fitting and aggressive space mapping,is utilized to synthesis this special flat-shoulder-shaped radiation pattern.In addition,a compact substrate-integrated waveguide feeding network is designed for realizing a compact array footprint while reducing parasitic radiation.The proposed antenna is fabricated using a low-cost single-layer printed circuit board process.Measurement results demonstrate a peak gain of 19.8 dBi and a desirable flat-shoulder-shaped radiation pattern at 77 GHz,making it a promising candidate for 77 GHz automotive radar applications.
作者
余英瑞
曹明源
储子清
吴文
YU Yingrui;CAO Mingyuan;CHU Ziqing;WU Wen(School of Electronic and Optical Engineering,Nanjing University of Science and Technology,Nanjing 210094,China)
出处
《微波学报》
北大核心
2026年第1期46-52,共7页
Journal of Microwaves
基金
国家自然科学基金(62171222)
江苏省自然科学基金(BK20210333)。
关键词
中远距合一雷达
混合优化方法
基片集成波导
77
GHz车载雷达
medium and long range radar
mixed optimization method
substrate-integrated waveguide
77 GHz automotive radar
