Time domain analysis of incident field coupling to a microwave circuit: FDTD approach & PSpice validation

This article is devoted to a transient analysis of field-to-line coupling model. This one is a microstrip multiconductor transmission line (MTL), which can be uniform or not and connected with several loads either linear as a resistance, nonlinear like a diode or complex nonlinear as a Metal Semiconductor Field-Effect Transistor (MESFET). The finite difference time-domain technique (FDTD) is used to compute the expression of voltage and current at the line. The primary advantage of this method over many existing methods is that nonlinear terminations may be readily incorporated into the algorithm and the analysis. The numerical predictions are compared those obtained by using PSpice Software. The agreement between the both results are generally good.