| 摘要: |
| 针对宽波束天线在车载雷达中的应用，突破角雷达方位面3 dB波束宽度的限制，实现微带阵列天线在水平面的宽波束覆盖，设计了一款1×10串馈微带双层结构天线。线阵单元采用道尔夫-切比雪夫（Dolf-Chebyshev）综合法电流分布来达到降低天线俯仰面副瓣的效果，在串馈阵列上方加载寄生贴片和介质基板拓展天线方位面的3 dB波束宽度。分析了双层天线展宽波束的原理，加工并实测了双层宽波束天线，其方位面的3 dB波束宽度为134.6°，增益达到10.6 dB，副瓣电平为-19.8 dB,可以满足车载角雷达天线需求。 |
| 关键词: 77 GHz车载角雷达 宽波束天线 双层结构 寄生贴片 |
| DOI： |
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| 基金项目:广西科技重大专项（桂科AA19254012） |
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| Design of a double-layer wide-beam antenna |
| JIANG Xing,WANG Kaifa,LIAO Xin,SUN Jinghu,WANG Jiheng,YANG Ming |
| (1.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) |
| Abstract: |
| For the application of wide-beam antenna in vehicle borne radar,a 1×10 series fed microstrip double-layer structure antenna is designed,which breaks through the limitation of 3 dB beam width in azimuth plane of angle radar and realizes wide-beam coverage of microstrip array antenna in horizontal plane.In order to reduce the side-lobe of the antenna in the vertical plane,the Dolf-Chebyshev current distribution method is used in the linear array unit,and the parasitic patch and dielectric substrate are loaded above the series fed array to expand the 3 dB beam width of the antenna azimuth plane.The principle of broadening beam of double-layer antenna is analyzed,and the double-layer wide-beam antenna is fabricated and measured.The measured results show that the 3 dB beam width of the azimuth plane of the antenna is 134.6°,the gain is 10.6 dB,and the side-lobe level is - 19.8 dB.The specifications meet the requirements of vehicle borne angle radar antenna. |
| Key words: 77 GHz vehicle angle radar wide-beam antenna double-layer structure parasitic patch |
