Responses comparisons for coupled-resonator based diplexers

Previously we have proposed a novel coupled-resonator based multiplexer structure that eliminates the need for an additional common junction [2] such as a manifold, T-junction or power splitter. This new approach to multiplexer design is able to achieve reductions in the size and volume of the circuit. In this paper, the relationships between the responses and topologies of this novel type of diplexer structures are investigated.