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针对受计算机资源限制导致大阵辐射场难以计算的问题,主要介绍了阵列天线远场辐射方向图的计算方法。依据小阵的基本思想,可以等效计算大型阵列天线的电流分布,从而快速准确地计算出了大型线阵和面阵的辐射方向图。用二元阵互阻抗填充远距离的互阻抗,得到的大型阵列天线的阻抗矩阵来计算天线阵的辐射场,在此计算时需要选取合适的小阵阵元,使传统的阻抗矩阵外推法计算得到的辐射场更精确,最后得到的辐射场比较接近仿真值。
Aiming at the problem of large array radiation field difficult to calculate due to computer resource limitation, this paper mainly introduces the calculation method of array antenna far field radiation pattern. According to the basic idea of the array, the current distribution of the large array antenna can be calculated equivalently, so that the radiation pattern of the large linear array and the area array can be calculated quickly and accurately. In this calculation, we need to select the appropriate small array element so that the traditional impedance matrix extrapolation method can be used to calculate the radiation field of the antenna array by filling the long-distance mutual impedance with the dual-element mutual impedance and the impedance matrix of the large array antenna obtained. The calculated radiation field is more accurate and the resulting radiation field is closer to the simulation value.