蒸发波导环境中的雷达探测性能分析

Analysis of radar detection ability in evaporation duct environment

应用抛物型方程和电波传播的基本理论,计算了电磁波在近海面中性层结条件蒸发波导中和标准大气中的传输损耗,得到了蒸发波导中电磁场的空间分布特性。利用伪彩色图分析了蒸发波导厚度、天线高度和发射仰角对雷达探测性能的影响,数值仿真克服了目前射线描迹技术尚不能精确描述空间场分布的缺点,为有效预测雷达系统的探测盲区以及覆盖区提供了可靠的依据。

The evaporation duct environment in China sea was briefly described. With the parabolic equation method and the basic theory of the radio-wave propagation, the transmission loss was calculated at the neutral atmospheric stratification in the evaporation duct near the sea surface and at standard atmosphere. The space characteristic of the EM field was presented in evaporation duct. The impaction of the duct height, antenna height and grazing angle on radar detection ability was analyzed in the evaporation duct under the neutral atmospheric stratification condition and at standard atmosphere by the pseud-color map. The research offers the reliable basis for predicting the blind area of the radar system effectively.