一种计算具有内圆柱导体矩形线特性阻抗的新方法

A New Method of Calculating the Characteristic Impedance of Rectangular Line with Circular Inner Conductor

本文采用保角变换技术,将内外接多边形柱取代内圆导体,得到的传输线特性阻抗作为真值的上、下限,并研究了其相对偏差情况,从而得到了计算具有内圆导体矩形线特性阻抗的一种新方法,所得结果与文献的数据吻合良好,最大偏差<0.5％.

In this paper, by replacing the circular inner conductor respectively with inner and outer closed polygon(N = 8)conductors, we obtain their characteristic impedances Zcin,Zcout, as the upper and lower limits of the real value Zc(Zcin>Zc>Zcout)by means of conformal mapping technology. The study of their relative deviations is made and then we get a new method of calculating Zc. The maximum relative error of results obtained by this method to the ones given in [4],[7] is less than 0. 5%.