Mixed modes dielectric resonator filters

Author

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

Author_Institution

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

Volume

42

Issue

12

fYear

1994

fDate

12/1/1994 12:00:00 AM

Firstpage

2449

Lastpage

2454

Abstract

A new configuration of dielectric loaded cavity filters is presented. The filter combines the superior spurious free performance of TE₀₁ mode ring dielectric resonators with the advantage of HE ₁₁ dual-mode dielectric loading. Resonant frequency, field distributions and unloaded Q of each cavity are computed by rigorous mode-matching technique. The fields are used to compute the coupling between two similar cavities by small aperture approximation based on formulae modified by Levy, which are extended to the cases of dissimilar cavities. Design aspects of the filter are discussed. This filter is used to construct an L-band triplexer. Excellent experimental results verify the theory and show the advantage of this type of filter

Keywords

Q-factor; UHF filters; cavity resonators; microwave filters; mode matching; passive filters; resonator filters; waveguide filters; L-band triplexer; dielectric loaded cavity filters; dielectric resonator filters; field distributions; mixed modes resonator filters; mode-matching technique; resonant frequency; small aperture approximation; unloaded Q; Apertures; Dielectric losses; Distributed computing; Filtering theory; L-band; Low pass filters; Resonant frequency; Resonator filters; Solids; USA Councils;

fLanguage

English

Journal_Title

Microwave Theory and Techniques, IEEE Transactions on

Publisher

ieee

ISSN

0018-9480

Type

jour

DOI

10.1109/22.339780

Filename

339780