It is often required to extend the model to frequencies well beyond the one-tenth wavelength limit of the lumped component model. Such a task can be carried out by invoking the concepts of transmission line theory. This involves the need for circuit components to be defined in terms of W/m, F/m, H/m, and S/m. Using this approach, transmission line theory derives a pair of hybrid equations relating current and voltage at the sending end of the line to the current and voltage at the far end.
Transmission line models, Page 1 of 2
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