应用于交通信息检测雷达的阵列天线设计  

Design of Microstrip Array Antenna Applied to Traffic Information Collection Radar

作　　者：张宙元[1,2] 余稳[1] 孙芸[1] 孙晓玮[1] 

机构地区：[1]中国科学院上海微系统与信息技术研究所,上海200050 [2]中国科学院研究生院,北京100049

出　　处：《现代雷达》2011年第4期67-70,75,共5页Modern Radar

基　　金：国家863课题资助项目(2008AA1Z203)

摘　　要：介绍了一种应用于交通信息检测中多普勒雷达前端的K波段64阵元微带双天线,该天线采用并联形式馈电,通过对天线互耦的分析,电抗补偿和减小耦合等方面的改进,满足了天线性能和尺寸等实际应用的需求。双天线衬底背面固定集成雷达收发前端和中频信号处理电路。经过对天线和整个系统前端的测试表明:天线在工作频点,回波损耗低于-20dB,最大增益为25.2dB,E面、H面半功率波瓣宽度为8.1°和6.3°,其仿真和测试结果较好吻合。整个雷达前端在实际外场测试中检测准确灵敏,并在实际智能交通系统工程中得到了很好的应用。A K-band 64-element microstrip double-antenna array applied to Doppler radar front-end of traffic information collection system is introduced.By parallel feeding with design improvements such as reactance compensation and decreasing coupling,this microstrip antenna array meets the requirement of antenna performance and size.The effect of mutual coupling between elements in such an array is included in the analysis.Doppler radar front-end and IF circuits are integrated on the back of double-antenna substrate.The experiments results show that the theoretical and measured results are in good agreement with each other in the working frequency,the return loss is less than-20 dB,the gain is 25.2 dB and half-power beam width is 8.1°degree in E-plane and 6.3°degree in H-plane.The detection of whole Doppler radar front-end is accurate and sensitive in the practical tests.So it＇s of good practical engineering application.

关 键 词：微带阵列天线 并馈 互耦 多普勒雷达前端 

分 类 号：TN957.2[电子电信—信号与信息处理]