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抛物方程模型(PE)已经被广泛用来分析各类电波传播问题,对于初始场的求解,该模型使用固定的高斯方向图函数来拟合实际天线方向图,这与近地线天线的方向图不符并产生计算误差。文章针对这一不足,提出一种基于FEKO/PE的混合算法。首先利用FEKO对近地半菱形天线进行建模求解,计算出天线附近一定距离处的场强,然后将其离散化后作为初始场代入抛物方程进行步进计算,得到了半菱形天线的地波场场强。与其他文献求解同类问题结果相比,FEKO/PE算法计算精度略低,但计算简便,适合工程应用。
The parabolic equation model (PE) has been widely used to analyze various types of radio propagation problems. For solving the initial field, the model uses a fixed Gaussian pattern function to fit the actual antenna pattern, which is similar to the pattern of the near-ground antenna Mismatch and calculation error. Aiming at this problem, this paper presents a hybrid algorithm based on FEKO / PE. First of all, FEKO is used to model the near-field semi-rhombic antenna to calculate the field strength at a certain distance near the antenna. Then, the field strength is discretized and used as the initial field into the parabolic equation for step calculation. Strong field. Compared with the results obtained by other literatures in solving similar problems, the FEKO / PE algorithm has a slightly lower precision, but the calculation is simple and suitable for engineering applications.