A two-step synthesis of broadband ridged waveguide bandpass filters with improved performances

Author

Nanan, Jean-Christophe ; Tao, Jun-Wu ; Baudrand, Henri ; Theron, Bernard ; Vigneron, S.

Author_Institution

Lab. d´´Electron., ENSEEIHT, Toulouse, France

Volume

39

Issue

12

fYear

1991

fDate

12/1/1991 12:00:00 AM

Firstpage

2192

Lastpage

2197

Abstract

A quarter-wave broadband ridged waveguide bandpass filter with improved attenuation has been designed and realized. The two-step synthesis uses an equivalent network whose parameters are obtained with a multimodal variation approach that characterizes the discontinuities involved in the structure. It is shown that the frequency behavior of the filter is determined at this step by the chosen filter prototype. The structure is optimized taking into account all side effects (higher order modes, dispersion) and the rectangular to ridged waveguide transformer. Predicted data are compared with measured data and good agreement is observed. It is shown how the use of λ/4 resonators improves the attenuation in the upper stop-band and reduces the filter volume, which is important in on-board satellite telecommunication systems

Keywords

band-pass filters; equivalent circuits; microwave filters; passive filters; resonators; waveguide components; λ/4 resonators; attenuation improvement; broadband; discontinuities; dispersion; equivalent network; filter prototype; higher order modes; multimodal variation approach; quarter-wave; ridged waveguide bandpass filters; two-step synthesis; Attenuation; Band pass filters; Frequency; Inverters; Microwave filters; Network synthesis; Prototypes; Rectangular waveguides; Resonator filters; Satellites;

fLanguage

English

Journal_Title

Microwave Theory and Techniques, IEEE Transactions on

Publisher

ieee

ISSN

0018-9480

Type

jour

DOI

10.1109/22.106564

Filename

106564