Frequency-modulation type magnetic field sensor using transmission-line magnetic device

Author

Ikeda, S. ; Sato, T. ; Yamasawa, K.

Author_Institution

Shinshu Univ., Nagano, Japan

Volume

35

Issue

5

fYear

1999

fDate

9/1/1999 12:00:00 AM

Firstpage

3631

Lastpage

3633

Abstract

A novel frequency-modulation type magnetic field sensor composed of transmission-line magnetic device and phase-shift type oscillator has been developed. The transmission line magnetic device consists of soft magnetic layers, dielectric layers and conductor lines, which operate as a distributed constant circuit. The transmission characteristics such as voltage-gain and phase are influenced by permeability change due to the external magnetic field applied to the magnetic layer. A transmission-line device developed by using Co based amorphous ribbon was used in the feedback circuit of a phase-shift type oscillator. The oscillation frequency of the oscillator increased with increasing magnetic field

Keywords

distributed sensors; magnetic field measurement; magnetic permeability; magnetic sensors; phase shifters; amorphous ribbon; conductor lines; dielectric layers; distributed constant circuit; external magnetic field; feedback circuit; frequency-modulation type magnetic field sensor; oscillation frequency; permeability change; phase-shift type oscillator; soft magnetic layers; transmission characteristics; transmission-line magnetic device; Amorphous magnetic materials; Distributed parameter circuits; Frequency; Magnetic devices; Magnetic fields; Magnetic sensors; Oscillators; Sensor phenomena and characterization; Soft magnetic materials; Transmission lines;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/20.800613

Filename

800613