Full-wave analysis and model-based parameter estimation approaches for Y-matrix computation of microwave distributed RF circuits

Distributed microwave circuits are analyzed in time domain using the Transmission Line Matrix (TLM) method. System Identification (SI) and Spectral Analysis (SA) methods are used to compute S- and Y-parameters. Model-based approaches to calculate the Y-parameters from truncated signals are presented. The extracted models are compared with running TLM analysis in real-time. In this way a stop criterion for the TLM computation is obtained. Compared with ordinary time-domain simulation the presented method of admittance parameter computation yields a reduction of computation time. The behavior of a microswitch realized via micromachining technique was investigated by using the TLM and the SA (SI) methods.