Optimization of autonomous magnetic field sensor consisting of giant magnetoimpedance sensor and surface acoustic wave transducer

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. © 2012 IEEE.

Citation
Li, B., Morsy, A. M., & Kosel, J. (2012). Optimization of Autonomous Magnetic Field Sensor Consisting of Giant Magnetoimpedance Sensor and Surface Acoustic Wave Transducer. IEEE Transactions on Magnetics, 48(11), 4324–4327. doi:10.1109/tmag.2012.2202278

Publisher
Institute of Electrical and Electronics Engineers (IEEE)

Journal
IEEE Transactions on Magnetics

DOI
10.1109/TMAG.2012.2202278

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