坐标轴箔条云的电磁波传播特性研究

Study on Electromagnetic Wave's Propagation Characteristics in Cartesian-Coordinate-Structure Chaff Cloud

散射和传播是电磁波与目标相互作用时两个最基本的物理现象。在箔条干扰中,电磁波的传播效应是衡量箔条云团对敌方雷达波衰减能量的关键问题。本文针对一种坐标轴型箔条的应用需求,建立了箔条云和目标的合成回波模型,考虑了传播特性对目标散射回波的影响,并结合Oguchi方法对坐标轴箔条云的电磁波传播特性与箔条指向、位置、数量的关系进行了分析。仿真实验表明:坐标轴箔条云的电磁波传播特性不受其指向影响;在相同质量下,坐标轴箔条云的传播衰减约为传统箔条云的2.76倍,且不会出现相移,干扰性能更佳。此外,在给定仿真条件下,对不同数量的坐标轴箔条云在时间域和距离域上的干扰效果进行了分析,对坐标轴箔条的实际应用具有重要参考价值。

Scattering and propagation are two basic physical phenomena when electromagnetic waves interact with targets.In chaff jamming,the propagation effect of electromagnetic wave is the key to evaluate the attenuation performance of chaff cloud on the energy of enemy radar waves.Aiming at the application of Cartesian-coordinate-structure chaff,this paper establishes a synthetic echo model between chaff cloud and target,considers the influence of propagation characteristics on target backscattering echo,and uses Oguchi method to analyze the relationship between the electromagnetic wave's propagation characteristics of Cartesian-coordinate-structure chaff cloud and the direction,position and number of chaff.The results of simulation show that the electromagnetic wave's propagation characteristics of Cartesian-coordinate-structure chaff cloud are not affected by its direction;the propagation attenuation of this type of chaff cloud is about 2.76 times that of the traditional chaff cloud with the same quality,the echo has no phase shift and the interference performance is better than traditional chaff.In addition,under the assumed simulation condition,the interference effects of different numbers of Cartesian-coordinate-structure chaff clouds are analyzed in both time domain and range domain,which has important reference value for the practical application of Cartesian-coordinate-structure chaff.