低频宽带低空地面反射特性建模仿真及验证

发布时间：2019-02-19 12:43

【摘要】：低频宽带信号在提高雷达对目标的识别能力方面具有优势。为确定宽带信号的低空地面反射系数,本文对低频宽带信号的低空反射特性进行建模,提出了通过窄带各频点的地面反射系数来合成宽带信号等效地面反射系数的方法。通过仿真分析研究了宽带信号等效地面反射系数与地面特性(相对介电常数、电导率)、擦地角、天线极化特征的关系,确定了宽带信号的等效地面反射系数,并通过典型环境下低空天线方向图测试的方法,对典型环境地面反射系数进行测试,校验结果表明了宽带信号等效地面反射系数模型的有效性,为宽带雷达目标探测提供一定的理论依据。
[Abstract]:The low frequency wideband signal has the advantage in improving the radar recognition ability to the target. In order to determine the low altitude surface reflection coefficient of broadband signal, the low altitude reflection characteristic of low frequency wideband signal is modeled in this paper, and a method of synthesizing the equivalent ground reflection coefficient of broadband signal through the ground reflection coefficient of each frequency point in narrow band is proposed. The relationship between the equivalent ground reflection coefficient of wideband signal and the ground characteristics (relative dielectric constant, conductivity), ground erasing angle and antenna polarization characteristic is studied by simulation, and the equivalent ground reflection coefficient of wideband signal is determined. The ground reflection coefficient of typical environment is tested by the method of low altitude antenna pattern measurement in typical environment. The results show that the equivalent ground reflection coefficient model of wideband signal is effective. It provides a certain theoretical basis for broadband radar target detection.
【作者单位】：江南机电设计研究所;
【基金】：国防基础科研项目(0420132104)
【分类号】：TN957.51

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