摘要
相控阵天线辐射波束模型直观地展示了天线性能,在天线研制和运用中有着重要作用。而天线辐射波束在实际复杂环境中建模的准确性是一个亟待解决的问题。为了提高相控阵雷达天线波束在实际环境中建模的准确性,需要对相控阵天线辐射电磁场空间分布进行研究。首先求解了平面相控阵天线的方向图函数,建立了相控阵天线的辐射模型,然后采用抛物方程的方法建立了电磁波的传播模型,最后在matlab环境下应用SSFT算法求出了模型的数值解,得到了天线辐射电磁场的空间分布。绘制了天线辐射电磁波在无限空间内传播的衰减分布图,通过与天线方向图的理想传播衰减进行比较,验证模型的正确性。
In order to make the beam model of phased array antenna more accurate, a research of electromagnetic field beamed by phased array antenna was carried out. Firstly, the far - field radiation pattern of phased array antenna was solved out, with which the beaming model was established. Then the spread model of wave was established adopting Parabolic Equation （PE）. At last, the numerical value was solved using the method of Splitstep Fourier Transform （SSFT） in MATLAB. With the result, a spreading attenuation chart about the wave beamed by phased array antenna in unlimited space is drawn. The model is proved true, compared with the ideal spreading attenuation according to far - field radiation pattern of phased array antenna.
出处
《计算机仿真》
CSCD
北大核心
2015年第12期146-151,共6页
Computer Simulation
关键词
相控阵天线
电磁场分布
抛物方程
Phased array antenna
Electromagnetic field distribution
Parabolic equation （PE）
