Combiners can be connected together to realize Chain Combiners with different techniques (Starpoint, Manifold, and Balanced) and with different cavity sizes and different number of poles, allowing to optimize the Combiner chain.
A chain of n Balanced Combiners has n Narrowband inputs and one Wideband input, which can be further used to extend the combiner combination capability:
|Wideband Port Use
|Not used, Terminated with Load
||0 channels added
(can be added later)
|In the Wideband port or in the Output (antenna) side
|Filter, Starpoint, Manifold Combiner, or existing Combiner
||1, 2 or more extra channels added
||In the Output (antenna) side
Balanced Combiners also allow to be extended at a later stage. The new channels can be added inserting a new combiner in two possible different positions into the Combiner chain:
||New Combiner required
|In the Output (antenna) side
||The new Balanced combiner can be optimized to accept the existing channels
||Requires major mechanical work.
The new Combiner is generally bigger
|In the Wideband port
||Filter, Starpoint, Manifold, Balanced Combiners
||Requires minor mechanical work.
The new Combiner is generally smaller
|The Wideband of the existing combiner port must accept the new frequencies and withstand the increased power