Efficient Method for Time-Domain Analysis of Lossy Nonuniform Multiconductor Transmission Line Driven by a Modulated Signal Using FDTD Technique

In this paper, an unconditionally stable finite-difference time-domain algorithm is presented for analysis of lossy nonuniform multiconductor transmission line (MTL). The results of the proposed algorithm are confirmed by those of the Leap-Frog algorithm. The unconditionally stable algorithm alone c...

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Bibliographic Details
Published in:IEEE transactions on electromagnetic compatibility 2012-04, Vol.54 (2), p.482-494
Main Authors: Afrooz, K., Abdipour, A.
Format: Article
Language:English
Subjects:
Algorithms
Applied sciences
Carriers
Complex phasor transformation
Electromagnetic compatibility
Electronic equipment and fabrication. Passive components, printed wiring boards, connectics
Electronics
Equations
Exact sciences and technology
Excitation
Finite difference method
Finite difference methods
finite-difference time-domain (FDTD)
lossy nonuniform multiconductor transmission line (MTL)
Mathematical analysis
Mathematical model
modulated signal
Nonuniform
Numerical stability
Stability analysis
Studies
Systems, networks and services of telecommunications
Telecommunications
Telecommunications and information theory
Time domain analysis
Transmission and modulation (techniques and equipments)
Transmission line matrix methods
Transmission lines
unconditionally stable algorithm
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Summary:In this paper, an unconditionally stable finite-difference time-domain algorithm is presented for analysis of lossy nonuniform multiconductor transmission line (MTL). The results of the proposed algorithm are confirmed by those of the Leap-Frog algorithm. The unconditionally stable algorithm alone cannot decrease the time consumption, especially when the MTL is excited by modulated signals. The complex phasor transformation approach is used to separate the modulating signal from the carrier signal when an MTL is excited by a modulated signal. A new set of equations is generated using this approach. The new equations are based on the modulating signal, and the carrier signal is eliminated in these equations. The derived equations are solved by Leap-Frog algorithm, and the results confirm the accuracy of these equations. Finally, the proposed equations are solved by the unconditionally stable algorithm at several temporal step sizes. The results indicate that this method has much lower CPU time compared with the conventional method and also has a very good accuracy.
ISSN:0018-9375
1558-187X
DOI:10.1109/TEMC.2011.2161765