Open AccessA novel FDTD method for multi-conductor transmission lines terminating in frequency-dependent loads
Author(s) -
Zhenjun Wu,
Lifang Wang,
Chenglin Liao
Publication year - 2009
Publication title -
wuli xuebao
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.199
H-Index - 47
ISSN - 1000-3290
DOI - 10.7498/aps.58.6146
Subject(s) - finite difference time domain method , admittance , convolution (computer science) , electric power transmission , piecewise , frequency domain , fourier transform , piecewise linear function , mathematical analysis , admittance parameters , computer science , mathematics , voltage , electrical impedance , physics , optics , electrical engineering , engineering , quantum mechanics , machine learning , artificial neural network
A novel finite difference time domain FDTD method has been introduced to analyze multi-conductor transmission lines terminated with frequency-dependent loads. The admittance of frequency-dependent loads can be modeled by rational functions by using vector-fitting, then converting these functions into time-domain by inverse Fourier transform IFT. Based on the piecewise linear recursive convolution PLRC method, the relation between voltage and current of admittance parameters are deduced. Incorporating the formula into multiconductor transmission lines MTL FDTD equations, we get the general formula of MTL FDTD dealing with frequency-dependent loads. In simulating a typical circuit, the results agreed well with the results obtained by using the state-variable transmission model. It shows the method is valid in dealing with frequency-dependent loads.