A comprehensive design technique for the radial wave power combiner

A structure based on the radial wave power combiner has been developed that incorporates a radially periodic internal structure. This structure permits its design to be accomplished using techniques similar to those used for distributed-element filter design. Less than 0.3 dB insertion loss has been achieved over greater-than-one-octave bandwidth centered at 1200 MHz. The design technique achieves highly predictable performance, and is sufficiently general such that it may be applied to combiners of any order, operating bandwidth, and operating frequency.<>