On Thursday 04 April 2002 09:56, Ian White, G3SEK wrote:
mega snip
> Case 1. Directional coupler terminated by a transmission line and
> mismatched load; theory based on forward and reflected waves.
>
> Case 2. Directional coupler terminated by a lumped-component load;
> theory based on the relationship between voltage and current at a single
> point - NO transmission-line concepts to be used in this theory!
The directional coupler is the section of transmission line, and reflections
occur at its output end. It doesn't matter whether or not there's any more
transmission line downstream - there's just an impedance presented at the
output.
Steve
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