一种新型探地雷达天线的设计分析
doi: 10.3724/SP.J.1146.2008.01115
Design and Analysis of a Novel GPR Antenna
-
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。Abstract: 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.
-
Manoj Stephen Jayakumar. Antenna optimization for groundpenetrating radar using the finite difference time domaintechnique. [Master dissertation], South Dakota School ofMines and Technology, 1999.[2]Wu T T and King R W P. The cylindrical antennas withnonreflecting resistive loading[J].IEEE Trans. on Antennas andPropagation.1965, 13(5):369-373[3]钟顺时, 梁仙灵, 延晓荣. 超宽带平面天线技术. 电波科学学报, 2007, 22(2): 308-315.[4]Abbosh A M and Bialkowski M E. Design of ultrawidebandplanar monopole antennas of circular and elliptical shape[J].IEEE Trans. on Antennas and Propagation.2008, 56(1):17-23[5]Bai F, Zhong S S, and Liang X L. Leaf-shaped monopoleantenna with extremely wide bandwidth[J].Microwave Opt.Tech. Lett.2006, 48(7):1247-1250[6]Yan X R, Zhong S S, and Guo Y W. Compact hollowedprinted monopole antenna with extremely wide bandwidth[J].Microwave Opt. Tech. Lett.2007, 49(11):2883-2886[7]Su Hong. Investigations of RC-loaded bow-tie antennas forimpulse ground penetrating radar applications. [M.S. Thesis],University of Manitoba, 2006.[8]刘立业, 粟毅, 毛钧杰. 具有屏蔽腔和吸波材料的探地雷达天线的FDTD 分析. 电波科学学报, 2006, 21(3): 422-427. -
计量
- 文章访问数: 3343
- HTML全文浏览量: 80
- PDF下载量: 1527
- 被引次数: 0
下载:
