摘要
提出了一种应用于77GHz车载防撞雷达的新型45°线极化微带贴片天线阵列。通过反射相消槽实现相邻辐射贴片良好的阻抗匹配,通过幅度渐消压低了天线的旁瓣,中间馈电结合贴边矩形槽大大改善了天线的交叉极化。仿真与实测结果表明:该天线工作在75.7～77.6GHz,俯仰方位3dB波束宽度为正负4°,水平方位3dB波束宽度为正负50°。天线增益达15.6dB,归一化旁瓣电平小于-20dB,交叉极化比高于31dB。该天线形式可提高车载防撞雷达的抗干扰能力。
A novel 45°linearly polarized microstrip patch antenna array applied to the 77 GHz vehicle collision avoidance radar was presented. Good matching impedance between adjacent ra- diant patches was realized by the reflection-canceling groove, and the sidelobe of the antenna was suppressed by amplitude fading. Welt rectangular grooves combined with the middle feeding had greatly improved the cross polarization. The simulated and measured results show that the antenna operates at 75.7～77.6 GHz. The 3 dB beam-width in the elevation-azimuth is ±4° and in the horizontal azimuth is as broad as ±50°. The antenna gain is 15.6 dB, and the normalized sidelobe level is less than -20 dB. The cross-polarization ratio is higher than 31 dB. The antenna can be applied to improve the anti-jamming capability of vehicle anti-collision radar.
作者
金良
葛俊祥
JIN Liang;GE Junxiang(College of Electronic and Information Engineering,Nanjing University of Information Science ＆ Technology,Nanjing,210044,CHN;Institute of Radar Technology of Nanjing University of Information Science ＆ Technology,Nanjing,210044,CHN)
出处
《固体电子学研究与进展》
CAS
CSCD
北大核心
2018年第5期343-347,359,共6页
Research & Progress of SSE
基金
国家自然科学基金资助项目(61671249)
关键词
车载防撞雷达
45°线极化
天线阵列
交叉极化
vehicle collision avoidance radar
45-degree linearly polarized
antenna array
cross polarization
