Optimized 425MHz passive wireless magnetic field sensor

Bodong Li, Jürgen Kosel

Research output: Chapter in Book/Report/Conference proceedingConference contribution

2 Scopus citations

Abstract

A passive, magnetic field sensor consisting of a 425 MHz surface acoustic wave device loaded with a giant magnetoimpedance element is developed. The GMI element with a multilayer structure composed of Ni80Fe 20/Cu/Ni80Fe20, is fabricated on a 128° Y-X cut LiNbO3 LiNbO3 substrate. The integrated sensor is characterized with a network analyzer through an S-parameter measurement. Upon the application of a magnetic field, a maximum magnitude change and phase shift of 7.8 dB and 27 degree, respectively, are observed. Within the linear region, the magnetic sensitivity is 1.6 dB/Oe and 5 deg/Oe. © 2014 IEEE.
Original languageEnglish (US)
Title of host publication2014 IEEE MTT-S International Microwave Symposium (IMS2014)
PublisherInstitute of Electrical and Electronics Engineers (IEEE)
ISBN (Print)9781479938698
DOIs
StatePublished - Jun 2014

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