Bridging the Gap between TLM and FDTD

Channabasappa Eswarappa and Wolfgang J.R. Hoefer

A real-time interface between Transmission Line Modelling (TLM) and Finite Difference Time Domain (FDTD) algorithms has been developed and validated. A structure can be subdivided in an arbitrary manner into connected TLM and FDTD subdomains which are updated simultaneously. In this way the specific advantages of both methods can be exploited when solving a given problem. The interface procedure has been validated by solving identical structures first with TLM, then FDTD, and finally with a combination of both. All three methods yield identical numerical results for equal excitation, space and time resolution.

Further details can be found in

C. Eswarappa and W.J.R. Hoefer," Bridging the Gap between TLM and FDTD", IEEE Microwave and Guided Wave Letters, vol. 6, no. 1, pp. 4-6, January 1996.


Discretization of space with interconnected TLM and FDTD lattices.

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