Magnetically tunable filters for cellular communication terminals

Author

Krupka, Jerzy ; Abramowicz, Adam ; Derzakowski, Krzysztof

Author_Institution

Dept. of Electron. & Inf. Technol., Warsaw Univ. of Technol.

Volume

54

Issue

6

fYear

2006

fDate

6/1/2006 12:00:00 AM

Firstpage

2329

Lastpage

2335

Abstract

Magnetically tunable two-pole dielectric-resonator filters containing axially and circumferentially magnetized ferrite elements have been designed and investigated. Employing axially magnetized ferrites, a 20-MHz tuning range was obtained. The Q factor of resonators was 2500 and the tuning power was 1.8 W. Filters containing circumferentially magnetized discs demonstrated a 12-MHz tuning range with the Q factor over 8000 (tuning power 3.5 W) and 28 MHz with the Q factor 3500 (tuning power 3.5 W)

Keywords

Q-factor; UHF filters; cavity resonator filters; cellular radio; ferrite filters; tuning; waveguide filters; 1.8 W; 12 MHz; 20 MHz; 28 MHz; 3.5 W; Q factor; cellular communication terminals; ferrite loaded resonators; magnetically tunable filters; magnetized ferrite elements; two pole dielectric resonator filters; Dielectric materials; Ferrites; Magnetic materials; Magnetic separation; Manufacturing; Microwave filters; Permeability; Resonator filters; Tensile stress; Tuning; Dielectric resonators; ferrite loaded resonators; filters; tunable filters;

fLanguage

English

Journal_Title

Microwave Theory and Techniques, IEEE Transactions on

Publisher

ieee

ISSN

0018-9480

Type

jour

DOI

10.1109/TMTT.2006.875268

Filename

1643559