Optimization of Autonomous Magnetic Field Sensor Consisting of Giant Magnetoimpedance Sensor and Surface Acoustic Wave Transducer

Author

Li, Bodong ; Morsy, Ahmed Mohamed ; Kosel, Jürgen

Author_Institution

Phys. Sci. & Eng. Div., King Abdullah Univ. of Sci. & Technol., Thuwal, Saudi Arabia

Volume

48

Issue

11

fYear

2012

Firstpage

4324

Lastpage

4327

Abstract

This paper presents a novel autonomous thin film magnetic field sensor consisting of a tri-layer giant magnetoimpedance sensor and a surface acoustic wave transponder. Double and single electrode interdigital transducer (IDT) designs are employed and compared. The integrated sensor is fabricated using standard microfabrication technology. The results show the double electrode IDT has an advantage in terms of the sensitivity. In order to optimize the matching component, a simulation based on P-matrix is carried out. A maximum change of 2.4 dB of the reflection amplitude and a sensitivity of 0.34 dB/Oe are obtained experimentally.

Keywords

electromagnetic wave reflection; giant magnetoresistance; interdigital transducers; magnetic field measurement; magnetic sensors; magnetic thin films; matrix algebra; microfabrication; surface acoustic wave transducers; IDT design; P-matrix; autonomous thin film magnetic field sensor; double electrode IDT; electrode interdigital transducer; integrated sensor; optimization; reflection amplitude; sensitivity; standard microfabrication technology; surface acoustic wave transducer; surface acoustic wave transponder; trilayer giant magnetoimpedance sensor; Magnetic multilayers; Magnetoacoustic effects; Sensitivity; Surface acoustic wave devices; Surface acoustic waves; Transponders; GMI; Giant magnetoimpedance; SAW; autonomous sensor; surface acoustic wave;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/TMAG.2012.2202278

Filename

6332817