Title :
A stable algorithm for modeling lumped circuit source across multiple FDTD cells
Author :
Xu, Jie ; Zhao, An Ping ; Raisanen, Antti V.
Author_Institution :
Nokia Res. Center, Espoo, Finland
fDate :
9/1/1997 12:00:00 AM
Abstract :
Incorporating lumped-circuit elements into finite-difference time-domain (FDTD) simulation greatly enhances the FDTD method´s capability to model both distributed structures and lumped circuitries. The multiple-cell formulation proposed by C.H. Durney et al. (see ibid., vol. 6, p. 85-7, Feb. 1996) is only numerically stable for modeling structures with large permittivity. A stable algorithm for modeling material with both large and small permittivity is presented in this letter. Verification data is given together with detailed derivations
Keywords :
circuit analysis computing; finite difference time-domain analysis; lumped parameter networks; microwave circuits; numerical stability; permittivity; FDTD simulation; distributed structures; finite-difference time-domain simulation; lumped circuit source modelling; lumped circuitries; multiple FDTD cells; permittivity; stable algorithm; Circuit simulation; Circuit stability; Equations; Finite difference methods; Helium; Matrix decomposition; Numerical models; Permittivity; Time domain analysis; Voltage;
Journal_Title :
Microwave and Guided Wave Letters, IEEE
