Ridged waveguide manifold multiplexers with improved performance

This paper demonstrates the bandwidth improvement of a multiplexer overcoming the limitations imposed by the poor stopband performance of standard waveguide E-plane filters. Bandwidth improvement is achieved by introducing an integrated compact ridge waveguide filter in the multiplexer. A four-channel X-band ridged waveguide manifold multiplexer is used as an example. Electromagnetic modelling of the multiplexer and experimental verification of an integrated ridge waveguide filter are presented.