低頻寬帶低空地面反射特性建模仿真及驗證
發(fā)布時間:2019-02-19 12:43
【摘要】:低頻寬帶信號在提高雷達對目標的識別能力方面具有優(yōu)勢。為確定寬帶信號的低空地面反射系數,本文對低頻寬帶信號的低空反射特性進行建模,提出了通過窄帶各頻點的地面反射系數來合成寬帶信號等效地面反射系數的方法。通過仿真分析研究了寬帶信號等效地面反射系數與地面特性(相對介電常數、電導率)、擦地角、天線極化特征的關系,確定了寬帶信號的等效地面反射系數,并通過典型環(huán)境下低空天線方向圖測試的方法,對典型環(huán)境地面反射系數進行測試,校驗結果表明了寬帶信號等效地面反射系數模型的有效性,為寬帶雷達目標探測提供一定的理論依據。
[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.
【作者單位】: 江南機電設計研究所;
【基金】:國防基礎科研項目(0420132104)
【分類號】:TN957.51
本文編號:2426510
[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.
【作者單位】: 江南機電設計研究所;
【基金】:國防基礎科研項目(0420132104)
【分類號】:TN957.51
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