摘要
提出了一种带反射相消单元的W波段45度线极化微带贴片天线阵列.单列串馈天线阵采用泰勒加权结合反射相消单元实现了25dB的旁瓣抑制,通过添加贴边矩形槽改善了主瓣内的交叉极化.一阶十路功分器通过T型结取代一般的四分之一波长匹配段实现4.5倍的不等功分比.仿真与实测结果表明:组阵后的天线工作在75.7GHz^77.6GHz,水平和垂直方位3dB波束宽度可覆盖正负45度,该宽度内交叉极化比均高于18dB.天线增益达24dB,旁瓣抑制度达20dB.该天线形式可用于汽车防撞雷达并提高其抗干扰能力.
A 45-degree linearly polarized microstrip antenna array with reflection-canceling unit is proposed at W band.The single-row series-fed antenna array with sidelobe suppression of 25 dB is designed by the Taylor-weighted,combined with reflection-canceling unit.Meanwhile the cross polarization is improved in the main lobe by adding the rectangular welt groove.The power divider with first order and ten ways replaces quarter wavelength transmission lines with the T-shaped structure junction,which achieves the power division ratio of 4.5 times.The simulation and measure results show that the antenna works from 75.7 GHz to 77.6 GHz by arraying.The horizontal and vertical azimuth for 3 dB beam width can cover from-5 degrees to 5 degrees,where the cross polarization ratio is all higer 18 dB.The gain of the antenna is 24 dB and the sidelobe suppression is up to 20 dB.The antenna can be used in the vehicle anti-collision radar and further improve whose anti-jamming capability.
作者
金良
葛俊祥
汪洁
JIN Liang;GE Jun-xiang;WANG Jie(College of Electronic and Information Engineering,Nanjing University of Information Science & Technology,Nanjing,Jiangsu 210044,China;Institute of Radar Technology of Nanjing University of Information Science &Technology,Nanjing,Jiangsu 210044,China)
出处
《电子学报》
EI
CAS
CSCD
北大核心
2019年第6期1378-1383,共6页
Acta Electronica Sinica
基金
国家自然科学基金(No.61671249)
关键词
W波段
45°线极化
泰勒加权
交叉极化
汽车防撞雷达
w band
45-degree linearly polarized
taylor-weighted
cross polarization
vehicleanti-collision radar
