Parameters of asymmetrical co-planar striplines with finite substrate thickness

Abstract

Analytical formulae for the quasi-TEM parameters of an asymmetrical co-planar stripline with finite substrate thickness are obtained from those of the infinite-thickness structure. Their accuracy is verified by a comparison between the calculated and available results for the specially symmetrical case. In addition, these line parameters are calculated approximately by simulating an asymmetrical co-planar line with two symmetrical lines. Good agreement is obtained for a wide range of geometric parameters.