Synthesis and Design Procedure for High Performance Waveguide Filters Based on Nonresonating Nodes

The synthesis and design of filters with nonresonating nodes (NRN) is applied to a practical case of hard requirements, with the aim of demonstrating the practical limits of such technique. An eight pole full inductive waveguide filter for space applications has been designed using a distributed model with frequency dependent inverters. Furthermore, the filter has been slightly tapered to scatter spikes due to the NRN unwanted resonances following a minimum dispersion criterion and maximum bandstop free of spurious. This feature has been incorporated into the distributed model showing down-to-earth designs from the very beginning of the design process.