Error Estimation of the Cauer Ladder Network Method for the Time-Domain Analysis and Its Application to a Multiport System

The Cauer ladder network (CLN) method can accelerate eddy current field analysis of electromagnetic devices in the time domain by reducing the order of the finite-element (FE) model. To control its accuracy, the reduction error should be estimated without conducting the FE analysis. In this study, we extend the estimation method in the frequency domain developed in a previous study to time-domain analysis. The proposed method is also extended to a multiport system. Numerical examples illustrate that the proposed error estimation method is effective.