园顶阵的几何光学分析

Analysis of Dome Array by Use of the Method of Geometrical Optics (MGO)

本文讨论了分析园顶阵的几何光学方法,推导了带柱面透镜顶的相控阵(二维阵)和带球面透镜顶的相控阵(三维阵)的口径场幅度、相位的计算公式及口径场的极化。对二维阵用几何光学法和绕射法计算,结果表明,当阵相当大时,两种方法所得结果是相当符合的。

The method of geometrical optics that is applicable to the analysis of the dome array is discussed. The formulas to evaluate the amplitude and the phase of the aperture fields are derived for the phased array covered with a cylidrical tens (two-dimension array) and for that with a spherical lens (threedimension array). The polarization of the aperture fields is discussed too. The numerical computations are carried out for a two-dimension array by use of both the MGO and the diffraction method. The results show that the agreement between these two methods is seen to be good, if the array is large.