一种新型探地雷达天线的设计分析  

Design and Analysis of a Novel GPR Antenna

作　　者：吴秉横[1] 纪奕才[1] 方广有[1] 

机构地区：[1]中国科学院电子学研究所,北京100190

出　　处：《电子与信息学报》2009年第6期1487-1489,共3页Journal of Electronics & Information Technology

基　　金：国家自然科学基金(60551002);国家863计划项目(2008AA10Z205)资助课题

摘　　要：该文研究了一种近似椭圆结构的超宽带偶极子天线。通过设计沿着振子向末端方向渐变的导体臂,可以有效地减小天线末端电流的反射,改善天线的输入阻抗特性,拓宽天线的带宽。由于没有采用任何加载措施,此天线相比电阻加载宽带天线具有更高的效率。采用三维电磁仿真软件对天线进行了分析和设计,根据设计结果实际制作了一副天线样机,并对其电压驻波比和辐射特性进行了测试,测试结果与仿真设计结果吻合良好。仿真结果和实验测试结果表明,该天线在很宽的工作频带内具有良好的阻抗特性和辐射特性。An ellipse-like UWB dipole is investigated in this paper. By designing a novel antenna structure, which can effectively reduce the current reflection at the end of dipole, the input impedance is improved, and the bandwidth is widened. The dipole is more effective than the resistance loaded bow-tie antenna. In this article, the dipole is analyzed and designed by an EM simulation tool and a sample antenna is produced based on the design results. The VSWR and radiation pattern of the proposed antenna are measured and the results prove the validity of the simulation. The results indicate that the novel antenna has a wide bandwidth and a good radiation performance.

关 键 词：探地雷达天线 超宽带 椭圆偶极天线 阻抗特性 

分 类 号：TN957.2[电子电信—信号与信息处理]