| 脉冲探地雷达的模拟计算 |
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| 引用本文： | 方广有 汪文秉 等. 脉冲探地雷达的模拟计算[J]. 微波学报, 1998, 14(4): 288-295 |
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| 作者姓名： | 方广有 汪文秉 等 |
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| 作者单位： | 中国电波传播研究所!453003(方广有，张忠治)，西安交通大学电信学院!710049(汪文秉) |
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| 摘 要： | 本文在给出Debye型色散媒质中2．5维时域有限差分法（2．5D－FDTD法）迭代公式的基础上，对无载频脉冲波在不同色散媒质中的传播特性进行了计算，分析了脉冲产生畸变的原因，并提出对部分畸变脉冲进行整形的方法。分别对地下单体目标和群体目标的雷达回波电平图进行了模拟计算，并与实际无载频脉冲探地雷达的探测结果进行比较，二者有较好的一致性，证实了本文所给计算公式的正确性。另外，还分析了土壤参数对雷达探测深度和分辨率的影响。
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| 关 键 词： | 无载频脉冲探地雷达 色散媒质 时域有限差分法 地下目标探测 |
Numerical Simulation of Ground Penetrating Radar |
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| Abstract: | The 2. 5D-FDTD formula in Debye dispersive media is deduced in this paper. Thepropagation properties of nanosecond baseband pulses in different dispersive media are calculated.The mechanism for the cause of the pulse distortion is analysed. The pseudo-color pictures of oneobject and six objects in different media are calculated. The comparison between the resultsobtained by FDTD method and the ones by our Ground Penetrating Radar(GPR) system is made,and the FDTD's results are in good agreement with the measured ones. The influence of the lossysoil media parameters to the detectable depth and the resolution of GPR are studied. |
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| Keywords: | Ground Penetrating Radar (GPR ). Dispersive media Finite-Difference TimeDomain (FDTD ) method. Underground objects detection |
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