Incorporación de circuitos concentrados de dos puertas en simuladores electromagnéticos temporales basados en el método FDTD

Abstract

The Lumped-Element Finite Difference Time- Domain (LE-FDTD) method is an extension of the original FDTD method that allows circuital lumped elements to be incorporated into FDTD simulators. The Lumped-Network (LN) FDTD technique is an improvement of the LE-FDTD method that permits linear one-port LN to be implemented in a systemtic way and using only a single FDTD cell. This paper presents an extension of the LN-FDTD method for the incorporation of linear two-port LN into the FDTD framework. The method basically consists of describing a two-port LN by means of its admittance matrix in the Laplace domain. By using appropriate digital signalprocessing methodologies a set of difference equations that models the two-port LN behavior is derived. The new approach has been validated by comparison with the LNFDTD method and with the circuital simulator ADSⓇ.