CALCULATION OF COUPLING GAP AND FRINGING CAPACITANCES IN COUPLED RECTANGULAR BARS BETWEEN GROUND PLANES

A structure comprising an array of coupled rectangular bars between gr ound planes, in which it is frequently desired to know the appropriate spacing to realize a given bar-to-bar coupling capacitance per unit l ength, is considered. The converse problem Of finding the coupling cap acitance given the spacing was treated by Getsinger (1962) but the res ults, presented in graphical form, are not easy to incorporate into a computer program. A new analysis which solves the problem directly, in a form capable of being implemented numerically, is presented. An alg orithm is given to calculate the fringing capacitances and their distr ibution.