Dual-mode dielectric or air-filled rectangular waveguide filters

Author

Liang, Ji-Fuh ; Liang, Xiao-Peng ; Zaki, Kawthar A. ; Atia, Ali E.

Author_Institution

Dept. of Electr. Eng., Maryland Univ., College Park, MD, USA

Volume

42

Issue

7

fYear

1994

fDate

7/1/1994 12:00:00 AM

Firstpage

1330

Lastpage

1336

Abstract

An accurate design technique of dual-mode microwave dielectric or air-filled rectangular waveguide filters is described. Dual-mode coupling is realized by a section of rectangular waveguide with square-corner-cut. The unequal couplings between dual-mode pairs of the cavities is provided by a section of evanescent mode waveguide. Rigorous analyses are applied to characterize the microwave junctions and to obtain the design parameters for the filter. The design procedure used to determine the dimensions of the waveguide junctions with a minimum of computational effort is described. The design is demonstrated by four-pole and six-pole dual-mode rectangular waveguide elliptic function filters. Excellent agreement between computer simulation and experimental results with absolutely no tuning justifies the design

Keywords

band-pass filters; cavity resonators; dielectric-loaded waveguides; equivalent circuits; frequency response; microwave filters; passive filters; rectangular waveguides; waveguide components; air-filled filters; design technique; dual-mode coupling; dual-mode dielectric filters; elliptic function filters; evanescent mode waveguide; four-pole type; microwave junctions; rectangular waveguide filters; six-pole type; square-corner-cut; Coupling circuits; Dielectrics; Frequency; Insertion loss; Iris; Microwave filters; Microwave theory and techniques; Rectangular waveguides; Tuning; Waveguide junctions;

fLanguage

English

Journal_Title

Microwave Theory and Techniques, IEEE Transactions on

Publisher

ieee

ISSN

0018-9480

Type

jour

DOI

10.1109/22.299726

Filename

299726