Tunability and bandwidth of microstrip filters fabricated on magnetized ferrites

Author

León, G. ; Boix, R.R. ; Medina, F.

Author_Institution

Dept. of Electron. & Electromagnetism, Univ. of Seville, Sevilla, Spain

Volume

14

Issue

4

fYear

2004

fDate

4/1/2004 12:00:00 AM

Firstpage

171

Lastpage

173

Abstract

The method of moments in the spectral domain is applied to the rigorous full-wave analysis of coupled line microstrip filters fabricated on magnetized ferrites. The results show that the center frequency of the filters can be tuned over a wide range by adjusting the magnitude of the bias magnetic field of the ferrite substrates. However, the filters bandwidth is reduced as the tuning frequency increases. This bandwidth reduction is explained in terms of the behavior of the resonant frequencies and quality factors of the resonators included in the filters.

Keywords

band-pass filters; ferrite filters; method of moments; microstrip filters; spectral-domain analysis; bandpass filters; bias magnetic field; center frequency; coupled line; ferrite substrates; full-wave analysis; magnetic tuning; magnetized ferrites; method of moments; microstrip filters; microstrip resonators; microwave ferrites; Bandwidth; Couplings; Ferrites; Frequency; Magnetic analysis; Magnetic domains; Magnetic separation; Microstrip filters; Moment methods; Resonator filters;

fLanguage

English

Journal_Title

Microwave and Wireless Components Letters, IEEE

Publisher

ieee

ISSN

1531-1309

Type

jour

DOI

10.1109/LMWC.2004.827109

Filename

1291454