相控阵雷达系统建模中的天线仿真技术

Modeling and Simulation of Antenna in Phased-Array Radar System Modeling

在对相控阵雷达系统建模仿真工作中,相控阵天线建模仿真是其中的关键所在。首先研究和探讨了平面相控阵天线仿真数学模型,给出了方向图数学函数。接着介绍了相控阵雷达系统建模中天线建模仿真的两种主要方法,多通道阵元级合成方法和方向图数据载入法。阵元合成法基于方向图数学函数给出了常规和差多通道的仿真算法,方向图载入法研究了如何对数据文件进行双线性插值来计算任意角度的增益。最后利用多通道阵元级合成方法进行了天线方向图建模仿真,通过仿真结果表明该算法的正确性,并说明两者仿真方法的适用条件。

The modeling of phased array antenna is the key process of the simulation of phased array radar system. The mathematical model of antenna pattern is introduced at first, then two main methods of modeling and simulation of the antenna is discussed：an array-element synthesis method, based on which pattern simulation of phase sum and difference can realize; the other method is to load antenna direction pattern data and use bilinear interpolation to compute antenna gain at any angle. And then a simulation example of a multi channel phased array antenna using synthesis method is given and the simulation results show the correctness of the algorithm. At last the applicable conditions of the two methods is illustrated.