Edge shape effects and quasi‐closed form expressions for the conductor loss of microstrip lines

Much work has been done in the past to determine the conductor loss of microwave and millimeter‐wave integrated circuits (MIMICs). However, much of this work is limited by constraints on the conductor thickness, skin depth, or the shape of the edge. In this paper, a technique will be presented that results virtually in a quasi‐closed form expression for this loss in many cases. This expression will allow the calculation of the attenuation constant for a planar circuit for an arbitrarily shaped edge and any conductor thickness. The question of how different edge shapes affect the conductor loss will be addressed.