A parameter estimation for linear model of electromagnetic field scattering within microwave devices

Аuthors

Kuznetsov Y. V.^1*, Shevgunov T. Y.^**, Baev A. B.^2***

1. ,
2. Moscow Aviation Institute (National Research University), 4, Volokolamskoe shosse, Moscow, А-80, GSP-3, 125993, Russia

*e-mail: kuztetsov@mai-trt.ru
**e-mail: shevgunov@gmail.com
***e-mail: baev@mai.ru

Abstract

A linear model is presented to describe electromagnetic field scattering processes within microwave devices. The model consists of dynamic and non-dynamic linear systems. An impulse response estimation technique is considered for given input and output signals obtained by numerical time domain simulation of the scattering process. A new stability criterion is suggested to perform a posteriori estimation of dynamic model order as well as techniques to implement this criterion. The matrix pencil method is applied to estimate parameters of the dynamical system in time domain. The vector fitting technique is used to estimate linear model parameters in frequency domain. An identification problem for microwave coplanar resonator is discussed as an example basing on simulation results obtained by means of transmission line matrix (TLM) technique.