New for May 2015!
Switch matrices have multiple RF applications and often quite complicated and expensive. An M x N matrix can switch M inputs to N outputs.
There are generally two architectures, "blocking" and "non-blocking". Non-blocking is more complicated.
In a non-blocking RF switch matrix, one input can be switched to multiple outputs, or even all of the outputs. However, you can't switch more than one input to the same output.
In a blocking RF switch matrix, an input can be switched to a single output, and that output cannot be used by any of the other inputs (it is blocked).
Non-blocking architectures generally have N-way power dividers configured to each of M inputs, and a switch network completes the output side.
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