AN IMPROVED DYNAMIC-MODEL IN INTEGRAL-EQUATION METHODS FOR THE CHARACTERIZATION OF DISCONTINUITIES IN PLANAR CIRCUITS

An efficient method to improve the integral equations method is presen ted in this article. A delta gap source generator and the fundamental mode sampling technique are employed. By employing this modified metho d, observation of the SWR and the creation of a large matrix in the co nventional method employing a delta gap source generator are not neces sary. Also, the modeling complexity and the time-consuming computation of the conventional method, which employs the semiinfinite traveling- wave mode, are avoided. In this article we use the coplanar waveguide short-end discontinuity as an example to describe this method in the s pectral domain. Moreover, numerical results are compared with our expe rimental data and they show good agreement. (C) 1996 John Wiley & Sons , Inc.