Title :
Impedance matching networks for power transfer and sensitivity enhancement in GMI sensors
Author :
de Cos, D. ; Sandacci, S.I. ; García-Arribas, A. ; Barandiarán, J.M.
Author_Institution :
Dept. de Electr. y Electron., Pais Vasco Univ., Bilbao, Spain
Abstract :
Magnetoimpedance (MI) is an extending area of research because of its importance for low-field magnetic sensors. Due to the high-frequency principle of operation, MI sensors have to be designed in accordance with radio-frequency (RF) schemes. A widely used RF technique, consisting of three-element T-models of matching networks has been applied, to design electronic interfaces for GMI sensors based on high-frequency modulation. Results show the achievement of an optimal transfer of power from the oscillator to the sensing load, together with a substantial enhancement of the modulation sensitivity.
Keywords :
giant magnetoresistance; impedance matching; magnetic sensors; magnetoresistive devices; GMI sensors; electronic interfaces; giant magnetoresistance; impedance matching networks; low-field magnetic sensors; magnetoimpedance; power transfer; radio-frequency techniques; sensitivity enhancement; three-element T-models; Distributed parameter circuits; Impedance matching; Intelligent networks; Magnetic field measurement; Magnetic fields; Magnetic modulators; Magnetic sensors; Power transmission lines; Radio frequency; Voltage-controlled oscillators; Electronic interfaces; GMI sensors; high-frequency measurements;
Journal_Title :
Magnetics, IEEE Transactions on
DOI :
10.1109/TMAG.2005.854714
