Please use this identifier to cite or link to this item:
Title: A tunable magnetic inductor
Authors: Ning, N. 
Li, X.P. 
Fan, J. 
Ng, W.C. 
Xu, Y.P. 
Qian, X. 
Seet, H.L. 
Keywords: Inductors
Magnetic films
Tunable circuits and devices
Issue Date: May-2006
Citation: Ning, N., Li, X.P., Fan, J., Ng, W.C., Xu, Y.P., Qian, X., Seet, H.L. (2006-05). A tunable magnetic inductor. IEEE Transactions on Magnetics 42 (5) : 1585-1590. ScholarBank@NUS Repository.
Abstract: For integrated radio-frequency applications, tunable magnetic inductors are expected. A tunable magnetic inductor, based on magnetoimpedance effect, is presented in this paper. The proposed inductor is constructed with a magnetic inductor body, wound by an insulated coil, inducing a longitudinal dc bias magnetic field when a dc control current is flowing through. Formed by a conductive core coated by a high-permeability magnetic layer, the magnetic inductor body can be realized by either a thin-film structure or a composite wire. The reluctance models for both thin-film and composite wire structures are studied. A prototype tunable magnetic inductor, using a composite wire element, has been characterized. The results show that by varying the dc control current, the inductance L of the magnetic inductor can be tuned. The tunable range depends on the frequency of the current flowing through the inductor. A relative variation of inductance ΔL/Lo, up to 18% at low frequency (around 5 MHz), is achieved by applying a bias current of magnitude merely up to 15 mA. The quality factor varies from 5 to 17 in the measured frequency range. The proposed tunable inductor may be further optimized for high-frequency applications and has the potential to be realized in micro-electromechanical systems technology. © 2006 IEEE.
Source Title: IEEE Transactions on Magnetics
ISSN: 00189464
DOI: 10.1109/TMAG.2006.870651
Appears in Collections:Staff Publications

Show full item record
Files in This Item:
There are no files associated with this item.


checked on May 26, 2023


checked on May 26, 2023

Page view(s)

checked on May 25, 2023

Google ScholarTM



Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.