A new procedure for interfacing the transmission line matrix (TLM) method with frequency-domain solutions

The authors present a new procedure that interfaces the transmission-line matrix (TLM) method with frequency-domain solutions of electromagnetic fields. Frequency-domain solutions are transformed into appropriate time-domain sequences using the discrete Fourier transform (DFT). Hence, the correspond...

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Bibliographic Details
Published in:IEEE transactions on microwave theory and techniques 1991-10, Vol.39 (10), p.1788-1792
Main Authors: Chen, Z., Hoefer, W.J.R., Ney, M.M.
Format: Article
Language:English
Subjects:
Applied sciences
Circuit properties
Conductivity
Discrete Fourier transforms
Electric, optical and optoelectronic circuits
Electromagnetic fields
Electromagnetic waveguides
Electronics
Exact sciences and technology
Microwave circuits, microwave integrated circuits, microwave transmission lines, submillimeter wave circuits
Rectangular waveguides
Reflection
Time domain analysis
Transmission line matrix methods
Transmission lines
Wideband
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Summary:The authors present a new procedure that interfaces the transmission-line matrix (TLM) method with frequency-domain solutions of electromagnetic fields. Frequency-domain solutions are transformed into appropriate time-domain sequences using the discrete Fourier transform (DFT). Hence, the corresponding boundary Johns matrix can be determined with minimum computational effort. The subsequent treatment consists in convolving the streams of TLM impulses incident on the boundary with a Johns matrix generated with the new approach. The method is used to obtain the time-domain reflection sequence of wideband absorbing terminations in a rectangular waveguide in the dominant mode operation. In addition, the time-domain analysis of pulse penetration through a sheet with high, but finite, conductivity is presented. Good results demonstrate the efficiency of the proposed procedure.< >
ISSN:0018-9480
1557-9670
DOI:10.1109/22.88555