An electronic approach to homogenize the impedance phase characteristics of heterogeneous GMI sensors

Authors

  • Eduardo Costa da Silva Department of Electrical Engineering / PUC-Rio
  • Luiz A. P. Gusmão Department of Electrical Engineering / PUC-Rio
  • Carlos Roberto Hall Barbosa Postgraduate Program in Metrology / PUC-Rio
  • Elisabeth Costa Monteiro Postgraduate Program in Metrology / PUC-Rio

DOI:

https://doi.org/10.21014/acta_imeko.v1i1.25

Abstract

Over the last decade, Giant Magnetoimpedance (GMI) sensors have been studied as a new possibility for measuring ultra-weak magnetic fields. To achieve that goal, the employment and optimization of gradiometric configurations are a key factor to reduce the magnetic interference. The performance of GMI gradiometers is strongly related to the homogeneity of the impedance characteristics of the GMI samples. This work presents a method and corresponding electronic implementation to homogenize the phase characteristics of heterogeneous GMI samples, aiming at improving the performance of phase-based GMI magnetometers.
ACTA IMEKO Vol 1 No 1 (2012)

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Published

2012-07-10

Issue

Vol. 1 No. 1 (2012)

Section

Research Papers

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