Patent ID: 8761026

Claim:
A multiplexer comprising: an input and a plurality of outputs, and a filter channelizer comprising at least two output filters, each output filter being coupled with a respective hybrid coupler, each respective hybrid coupler comprising an input port (port 1), two output ports (ports 2 and 3) and an isolated port (port 4); wherein: the multiplexer is configured to channelize an input radio frequency (RF) band of electromagnetic energy into a set of output channels by way of the filter bank; each output filter is coupled with a respective one of the plurality of multiplexer outputs; an input of each output filter is coupled to a first one of the two output ports of the respective hybrid coupler, a second one of the two output ports of the respective hybrid coupler being connected to a reflective open stub transmission line; and the respective hybrid coupler is coupled in a daisy chain, by way of port 1 and port 4, with one or more of the input of the multiplexer, and at least one other respective hybrid coupler in the daisy chain.