| FD-TD法分析无载频脉冲探地雷达特性 |
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| 引用本文： | 方广有,张忠治,汪文秉.FD-TD法分析无载频脉冲探地雷达特性[J].电子学报,1999,27(3):74-78. |
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| 作者姓名： | 方广有 张忠治 汪文秉 |
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| 作者单位： | 1. 中国电波传播研究所,新乡,453003
2. 西安交通大学微通所,西安,710049 |
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| 摘 要： | 本文首先利用三维ＦＤＴＤ法对集中电阻加载圆柱形偶极天线的近地面辐射特性进行了计算，给出了天线上电流波形并分析了加载电阻和有耗媒质参数等因素对电流波形的影响；分析并计算了天线“方向图”及其随天线高度和媒质参数变化的规律。其次，利用色散媒质中２．５维ＦＤＴＤ法迭代公式，模拟计算了地下目标雷达回波电平图，并与实际探测结果进行了对比，二者具有较好的一致性；分析了色散媒质参数对雷达探测深度的影响。
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| 关 键 词： | FD-TD法 无载频脉冲探地雷达 电阻加载线天线 瞬态辐射和散射 |
Study about the Properties of Carrier-Free Ground Penetrating Radar by FD-TD Method |
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| Fang Guangyou,Zhang Zhongzhi,Wang Wenbing.Study about the Properties of Carrier-Free Ground Penetrating Radar by FD-TD Method[J].Acta Electronica Sinica,1999,27(3):74-78. |
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| Authors: | Fang Guangyou Zhang Zhongzhi Wang Wenbing |
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| Abstract: | The
radiating properties of a linear dipole antenna loaded by lumped resistors are firstly
calculated by 3-D FD-TD method.The current waveforms on the antenna are given.The
influence of the loaded lumped resistors and the parameters of lossy media on the current
waveforms is also calculated and analysed.The pseudo-color pictures of the objects buried
in different media are calculated by 2.5D FD-TD method.The comparison between the result
obtained by FD-TD method and that by our Ground Penetrating Radar (GPR) system is made,and
excellent agreement is obtained.The parameters of lossy media to influence the detectable
depth and the resolution of GPR are studied. |
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| Keywords: | FDTD method Carrier-free ground penetrating radar Linear antenna loaded by lumped resistors Transient radiating and scattering poperties |
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