Novel multiplexer topologies based on coupled resonator structures

Novel multiplexer structures based on all-resonator topologies are presented here. The proposed multiplexers consist of only resonators without extra manifolds or circulators or power dividers. They can achieve various requirements of different filtering responses and arbitrary number of channels with miniaturized size. The proposed multiplexers are synthesized using optimization technique where coupling coefficients between coupled resonators are found. Different structures with various properties and responses are presented including symmetrical and asymmetrical channels. Reduction of the complexity of optimization processes is also presented.