Microwave multiplexer with channels of varying fractional bandwidths

A multiplexer includes a first channel segment having first components derived from a first log-periodically scaled prototype. The first channel segment receives a composite signal from a composite-signal port, selects a first channel having a first bandwidth and first center frequency from the composite signal, and directs a first channelized signal to the first channelized-signal port responsive to the first channel. In addition, the multiplexer includes a second channel segment, connected to the first channel segment and having second components derived from a second log-periodically scaled prototype. The second channel segment receives the portions of the composite signal from the composite-signal port via the first segment, selects a second channel having a second bandwidth and second center frequency from the composite signal, and directs a second channelized signal to a second channelized-signal port responsive to the second channel.