Análisis y Diseño de Filtros en Guía de Onda incluyendo Excitación Coaxial

Autores UPV
Año
CONGRESO Análisis y Diseño de Filtros en Guía de Onda incluyendo Excitación Coaxial

Abstract

A very efficient technique for the full-wave analysis and design of complex passive waveguide filters, including rectangular cavities with metallic cylindrical posts and coaxial excitation, is presented. This novel technique provides the wideband generalized admittance matrix representation of the whole structure in the form of pole expansions, thus extracting the most expensive computations from the frequency loop. In order to validate the accuracy and efficiency of this modal technique, three different waveguide filters have been considered. In particular, the design of a compact four-pole in-line filter with tuning screws operating in the X-band and including a standard (vertical) coaxial excitation, is first presented. Finally, two C-band six-resonator comb-line filters, one of them with a cross-coupling configuration, and excited both with a collinear end-launcher transition based on a disc-ended coaxial, are also designed. Numerical data from a commercial software, as well as measurements of a manufactured prototype, are included for verification purposes.