一种近地面工作时域天线特性分析  

Analysis of the Time-domain Antenna Operating Adjacent to the Ground

作　　者：周蔚红[1] 刘培国[1] 何建国[1] 

机构地区：[1]国防科技大学电子科学与工程学院,湖南长沙410073

出　　处：《国防科技大学学报》2005年第1期47-50,共4页Journal of National University of Defense Technology

基　　金：国家863计划资助项目(2001AA132020)

摘　　要：由于无载频探地雷达是一种近地面时域毫微秒脉冲探测系统,受半无限大有耗媒质界面的限制,所以对近地面时域天线的辐射特性的分析与计算极为困难。研制了一种贴片电阻加载的振子天线,用FDTD方法对其进行的分析和实际应用结果表明天线具有良好的波形保真度、良好的辐射特性和屏蔽效果,可以广泛地应用于探地雷达和其它超宽带系统。Carrier-free GPR (Ground-penetrating Radar) is a near-ground-time-domain detecting system using nanosecond pulse, influenced by half-infinite lossy media interface, therefore the analysis of scattering features of the near ground time-domain antenna is extremely difficult. This paper designs a bow-tie antenna loaded with patch resistors. Results of FDTD (Finite-difference Time-domain) calculation show good fidelity of the wave, and exciting radiation features as well as fine effect of shielding. It can be widely used in GPR and other UWB (Ultra-wide-band) systems.

关 键 词：超宽带 FDTD 探地雷达 

分 类 号：TN82[电子电信—信息与通信工程]