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TLM models of waves in moving media: refinements and dispersion analysis

✍ Scribed by William J O'Connor

Publisher
John Wiley and Sons
Year
2003
Tongue
English
Weight
125 KB
Volume
16
Category
Article
ISSN
0894-3370

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✦ Synopsis

Abstract

Two recent papers about transmission line matrix (TLM) models of waves in moving media used notional diodes to achieve the appropriate direction‐dependent wave speeds. Despite the algorithm's demonstrated success, the operation of the diodes might be criticized for being non‐physical from a circuit theory perspective. Alternative circuit models are here developed that avoid this objection, being based on wave two‐ports and standard circuit theory components. Their operation obeys the same numerical algorithm derived using the diodes, thereby confirming the validity of the original computational scheme. Furthermore these circuits lead more easily to the direction‐dependent wave speed expressions and provide exact analytic results for dispersion and attenuation effects, which are here presented and discussed. Copyright © 2003 John Wiley & Sons, Ltd.

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