Short and open circuited slot line

A slot line terminated by the short and open end is analysed by the spectral domain method (SDM). The original process of Yang and Alexopoulos (1988) is modified by application of the piecewise sinusoidal functions only. The reflection coefficient is obtained by fitting the field along the slot described by a superposition of those functions to the standing wave pattern by the least squares method. Closed form formulae of the normalized impedance of the slot line terminated by the short have arisen from fitting its values computed by the SDM. They facilitate CAD of circuits. Full wave analysis of the open-circuited slot line is performed. Agreement between theory and experiment and between our results and data published in the literature is very good.