A robust approach for derivation of new class of closed-form Green's functions for microstrip structures

Abstract

Based upon three-level approximation and the steepest descent path (SDP) method, we consider a robust approach for the derivation of a new class of closed-form Green's functions for microstrip structures. Some numerical results are presented for the validation of the present method. It is observed that this method can provide a more accurate evaluation of the spatial Green's functions than the previous method, even without the advance investigation of the spectral functions, over a wide frequency range. (C) 2004 Wiley Periodicals, Inc.