Description
Tunable Diplexers consist of two tunable Band pass Filters sharing a common port. Signals applied to the common port are separated in accordance with the pass band frequency of each filter network Signals applied to either channel are isolated from the adjacent channel, but are combined at the common port. Circulator designs, to enhance isolation, and non-circulator designs for non-directional applications and to minimize loss.
https://www.satellitedish.com/110335-02,%20Rev%20E.pdf