Land mine detection using a ground-penetrating radar based on resistively loaded Vee dipoles
Land mine detection using a ground-penetrating radar based on resistively loaded Vee dipoles
复制标题
使用基于电阻负载 V 型偶极子的探地雷达进行地雷探测
DOI：
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发表时间：
1999
期刊：
影响因子：
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通讯作者：
Glenn S. Smith
中科院分区：
文献类型：
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作者：
T. P. Montoya;Glenn S. Smith
电阻加载的V形偶极子被考虑用于短脉冲探地雷达，以探测埋置的杀伤人员地雷。首先，进行研究以选择最适合于该问题的短脉冲来辐射。一个简单的一维（1-D）的一些代表性的土壤和地雷的分析是用来选择一个辐射脉冲的形状类似的差分高斯脉冲在4 GHz的频谱峰值。基于先前的研究，V型偶极子的臂的电导率从馈电端到开口端线性地逐渐减小。一个完整的三维（3-D）时域有限差分（FDTD）模型的开发和用于模拟探地雷达地雷探测问题。利用该模型，选择并评估了一个垂直加载的V型偶极子。参数研究有关的问题进行，包括：不同的V形地面以上的高度，不同的地雷的横向和深度的位置，并检查地雷的几何形状对接收到的信号的影响。环境条件进行检查，包括从岩石和地面的形状变化的信号返回。通过与实验数据的比较，验证了FDTD结果。这些研究表明，反向加载的V型偶极子可以大大减少与天线相关的杂波，使区分地雷（目标）的任务变得更加容易。
Resistively loaded Vee dipoles are considered for use in a short-pulse ground penetrating radar (GPR) used to detect buried antipersonnel land mines. First, a study is made to select a short pulse to radiate that is most appropriate for the problem. A simple one-dimensional (1-D) analysis of some representative soils and a land mine is used to select a radiated pulse similar in shape to a differentiated Gaussian pulse with a spectral peak at 4 GHz. Based on previous studies, the conductivity of the arms of the Vee dipole is linearly tapered from the feed to the open ends. A fully three-dimensional (3-D) finite-difference time domain (FDTD) model is developed and used to simulate the GPR land mine detection problem. Using this model, a resistively loaded Vee dipole is selected and evaluated. Parametric studies related to the problem are conducted including: varying the height of the Vee above the ground, varying the position of the land mine both laterally and in depth, and examining the effects of the geometry of the land mine on the received signal. Environmental conditions are examined including signal returns from rocks and variations in the shape of the surface of the ground. The FDTD results are validated by comparisons with experimental data. These studies demonstrate that resistively loaded Vee dipoles can greatly reduce clutter related to the antenna, making the task of distinguishing land mines (targets) much easier.