用保角变换法计算任意源激励的任意截面柱体的辐射场

The Calculation of Radiation from a Conducting Cylinder of Arbitrary Cross-Section Excited by an Arbitrary Source through Conformal Trans Formation

利用保角变换方法，将奇异性边界变换为简单光滑的边界，从而使点匹配法计算表面电流时能自动控制边界的划分和匹配点的选取，因而它能处理任意截面导电柱体的散射问题。本文进一步将保角变换方法与互易定理结合起来，这一方法可以处理任意截面柱体旁天线辐射的一般问题。本文计算了无限长正四棱柱对平面波的散射并与圆柱的散射进行了比较；并计算了无限长导电正四棱柱分周向半波振子的辐射并用矩量法的结果进行了验证。

Through a conformal transformation from the singular boundary to a simple smooth one and using point-matching method for eraluation of the surface current, the matching-points can be aotomatically selected and the boundary dissected. Then, this method can be used to calculate the chattering problems about conducting cylinders of arbitrary cross-section. In this paper, using this method, the scetteting problems of a Square prism are discussed in comparison with those of a circular cylinder. The radiation of a half-wave dipole near a square prism is evaluated, and the resuh is compared with that from the moment method.