Magnetically tunable filters for cellular communication terminals

Magnetically tunable filters for cellular communication terminals

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...

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Veröffentlicht in:IEEE transactions on microwave theory and techniques 2006-06, Vol.54 (6), p.2329-2335
Hauptverfasser: Krupka, J., Abramowicz, A., Derzakowski, K.
Format: Artikel
Sprache:eng
Schlagworte:
Applied sciences
Circuit properties
Circumferences
Dielectric materials
Dielectric resonators
Dielectrics
Discs
Electric, optical and optoelectronic circuits
Electronic circuits
Electronics
Exact sciences and technology
Ferrite
ferrite loaded resonators
Ferrites
filters
Frequency filters
Magnetic materials
Magnetic separation
Manufacturing
Microwave filters
Microwaves
Permeability
Q factors
Resonator filters
Tensile stress
Terminals
tunable filters
Tuning
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Beschreibung
Zusammenfassung: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)
ISSN:0018-9480
1557-9670
DOI:10.1109/TMTT.2006.875268