Dimensional Synthesis of Evanescent-Mode Ridge Waveguide Bandpass Filters

作者：di Crestvolant Vittorio Tornielli^*; De Paolis Fabrizio

来源：IEEE Transactions on Microwave Theory and Techniques, 2018, 66(2): 954-961.

DOI：10.1109/TMTT.2017.2750166

• Equivalent circuit
• evanescent coupling
• microwave filters
• ridge waveguide
• slope parameters

This paper introduces a method giving dimensions of inline evanescent-mode ridge waveguide bandpass filters. Evanescent mode couplings are evaluated individually, without optimization of the entire filter. This is obtained through an improved network model of the evanescent-mode coupling, together with novel analytical formulas to correct the resonators slope parameters. Unlike prior works based on full-wave optimization of the overall structure, this method is fast and leads to accurate bandwidth results. Several filter examples are included to support the design method. A prototype filter has been manufactured and the RF measurements are in good agreement with theory.

• 出版日期2018-2