天线罩表面复杂区域的仿真有效性研究

内容简介：天线罩分析的高频方法基于局部平板近似、网络传输矩阵和等效电磁流积分法求解带罩天线的远区场，罩面曲率等因素对其计算精度的影响程度备受关注。分别采用射线法、口径积分-表面积分法和体积分方程法，针对天线罩尖部大曲率区域和平滑罩面上局部大曲率扰动2种情况，研究了高频方法的计算误差与罩面曲率的关系，结果表明：在罩面曲率半径大于5倍波长时高频方法能达到较好的精度，但在小于2倍波长时将出现严重的计算误差。

Abstract：The high frequency method for radome analysis based on local planar approximation, network transmis-sion matrix and the equivalent electromagnetic current integral method is widely used to calculate the far field of a radome-enclosed antenna. Under these methods, the radome surface curvature is the partial cause for calculation er-rors. The ray tracing method, the aperture integration-surface integration method and the method of moment for vol-ume integral equation are used to study the relationship between the calculation errors of the high frequency method and the radome surface curvature. The 2D model of the radome is established, with the large curvature tip region or big local curvature perturbation on its smooth surface. The calculation results, given in Figs. 2, 3 and 4, and their analysis show preliminarily that when the curvature radius of the radome surface is five times larger than the wave-length, the high frequency method based on local planar approximation has the calculation accuracy almost similar to the volume integral equation method of moment, but when the curvature radius is smaller than two times of the wavelength, the high frequency method has serious calculation error.

作者：王威, 万国宾, 巩亚萍, 袁中毅,

关键词：天线罩, 高频方法, 平板近似, 误差, 曲率,