The Transmission Line Matrix Method

The transmission line matrix (TLM) method [1–3], developed and first published in 1971 by Johns and Beurle has emerged as a powerful method for computer modeling of electromagnetic fields. In TLM the space is subdivided into cells. The electromagnetic field dynamics is modeled by wave pulses propagating between adjacent cells and scattered within the cells. The main advantage of the TLM simulation resides in the capability to model circuits of arbitrary geometry, and to compute and to display the time evolution of the fields. The TLM method exhibits an excellent numerical stability and is also suitable for modelling of lossy, dispersive and nonlinear media.

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