Direct-coupled filter utilizing ridge-loaded cavities

Author

Lenive, Vlad ; Ness, John

Author_Institution

Microwave Product Group, COMDEV Europe, Buckinghamshire, UK

Volume

3

fYear

2003

fDate

7-9 Oct. 2003

Firstpage

1251

Abstract

A waveguide filter was designed with significant reductions in size and weight and improved out of band spurious levels compared to a conventional filter. The wide bandwidth, high rejection level stopbands required a different approach to a conventional waveguide filter design. Eigenmodes of the ridge-loaded cavity are calculated using Method of Galerkin. The resultant generic structure is used for CAD synthesis of the band pass filter applying Mode Matching Technique. Experimental results are presented for an X-band filter showing good agreement with predicted characteristics. The filter performance is analyzed and compared to traditional design approach showing the advantages of using ridge-loaded cavities.

Keywords

CAD; Galerkin method; band-pass filters; cavity resonator filters; mode matching; ridge waveguides; waveguide filters; CAD synthesis; Galerkin method; X-band filter; band pass filter; band spurious levels; direct-coupled filter; generic structure; high rejection level stopbands; mode matching; ridge-loaded cavities; ridge-loaded cavity eigenmodes; waveguide filter design; wide bandwidth bands; Band pass filters; Electromagnetic coupling; Electromagnetic waveguides; Frequency; Iris; Microwave filters; Performance analysis; Rectangular waveguides; Resonance; Resonator filters;

fLanguage

English

Publisher

ieee

Conference_Titel

Microwave Conference, 2003. 33rd European

Print_ISBN

1-58053-834-7

Type

conf

DOI

10.1109/EUMC.2003.1262884

Filename

1262884