High sensitivity and broad bandwidth magneto-impedance effect in magnetic microstrip lines

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DOIResolve DOI: https://doi.org/10.3379/jmsjmag.21.S2_491
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  1. National Research Council of Canada
FormatText, Article
Journal titleJournal of the Magnetics Society of Japan
ISSN1880-4004
0285-0192
Volume21
IssueS2
Pages491–494
Subjectmagnetic sensor; magneto-impedance; magnetic microstrip line; transmission-line impedance; broad bandwidth, high sensitivity
Abstract
A unique magneto-impedance effect by directly flowing microwave power in a Magnetic Microstrip Line was investigated. The microwave can be modulated by external fields that caused the impedance change due to the permeability variation in the magnetic strip. The amplitude variation of the microwave carrier was rectified to obtain output signals. A simple structure sensor has been developed that exhibited a high sensitivity of 10 mV/Oe, a high changing ratio of 48% in the transmission-line impedance and a broad signal bandwidth of 300 MHz. This sensor has great advantages of high sensitivity and broad bandwidth over MI sensors previously proposed.
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LanguageEnglish
NPARC number23001477
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