摘要
设计了一种加载缺陷金属背腔的宽带高增益圆极化交叉偶极子天线。天线在宽末端椭圆辐射贴片的基础上加载具有两种工作模式的缺陷金属腔体,形成两个新的圆极化通带。此外,天线贴片刻蚀了十字型缝隙结构提升极化连续性,拓展天线圆极化带宽。同时,利用阶梯状相位延迟线,拓展天线阻抗带宽。对该天线进行仿真优化的结果表明:该天线的阻抗带宽99.2%(0.95~2.82 GHz,回波损耗小于−10 dB),圆极化带宽103.7%(0.9~2.84 GHz,轴比小于3 dB),工作带宽内峰值增益7.4 dBic,天线尺寸0.6λ_(0)×0.6λ_(0)×0.25λ_(0),可广泛应用在超高频段探地雷达系统中。
A broadband high-gain circularly polarized(CP)cross-dipole antenna loaded with a defective metal back cavity is proposed in this article.Based on wide-ended elliptical radiating patches,two new CP passbands are formed by loading defective metal cavities with two operating modes.In addition,four cross-slots are etched on the radiation patch to enhance polarization continuity.Meanwhile,a stepped phase delay line is employed to extend the impedance bandwidth(IMBW)of the antenna.The antenna is simulated and optimized,and the results show that the proposed antenna owns an IMBW of 0.95~2.82 GHz(99.2%),a 3 dB axial ratio bandwidth(ARBW)of 0.9~2.84 GHz(103.7%),a maximum gain of 7.4 dBic and a size of 0.6λ_(0)×0.6λ_(0)×0.25λ_(0),which meets the requirement of UHF band ground penetrating radar systems.
作者
杨国富
秦会来
王长瑞
YANG Guofu;QIN Huiai;WANG Changrui(China Construction Second Ltd.,Beijing 100160,China;The Third Construction Engineering Company Ltd.of China Construction Second Engineering Bureau,Beijing 100070,China;College of Mechanical&Electrical Engineering,Nanjing University of Aeronautics and Astronautics,Nanjing 210016,China)
出处
《测试技术学报》
2025年第5期506-510,共5页
Journal of Test and Measurement Technology
基金
中建二局科技资助计划(2021ZX000001)。
关键词
探地雷达
交叉偶极子天线
圆极化
缺陷金属腔体
宽带
ground penetrating radar
cross dipole antenna
circularly polarized
defected metal cavity
broadband
