Transient analysis of nonlinearly loaded arrangements consisting of thin wires and metallic patches

A combined frequency and time domain procedure for the simulation of arbitrary nonlinearly loaded arrangements consisting of metallic patches and thin wires is presented. The time-invariant, linear part of the structure is analysed by means of the method of moments in the frequency domain while the characteristics of the nonlinear, time-variant elements are included via a convolution integral of Volterra-type in the time domain. The universal applicability of the algorithm to a large variety of EMC problems is demonstrated by means of a simulation example and the results are verified by measurements. Finally a procedure for the characterisation of one-port nonlinear devices up to high frequencies based on a nonlinear node analysis and interpolation is presented