• DocumentCode
    1408656
  • Title

    Magnetic Sensor Design for Femtotesla Low-Frequency Signals

  • Author

    Harriman, Sarah K. ; Paschal, Evans W. ; Inan, Umran S.

  • Author_Institution
    Dept. of Electr. Eng., Stanford Univ., Stanford, CA, USA
  • Volume
    48
  • Issue
    1
  • fYear
    2010
  • Firstpage
    396
  • Lastpage
    402
  • Abstract
    A system for detecting magnetic fields in the femtotesla range at low frequencies is developed, including the antenna, transformer, and amplifier. Each component is described with relevant tradeoffs which allow a large variety of receivers to be easily designed for any magnetic field sensing in the very low frequency range. A system using a 1-??-1-mH impedance antenna is developed further as an example that has been used extensively in measurements all over the world in the frequency range of 50 Hz-30 kHz. It has a gain of 0.58 V/nT and a sensitivity of below 1 fT/Hz1/2 above 250 Hz.
  • Keywords
    amplifiers; atmospheric measuring apparatus; loop antennas; magnetic field measurement; magnetic sensors; magnetometers; transformers; amplifier; femtotesla low-frequency signals; frequency 50 Hz to 30 kHz; impedance antenna; magnetic field sensing; magnetic sensor design; transformer; Amplifiers; loop antennas; magnetic field measurement; magnetometers;
  • fLanguage
    English
  • Journal_Title
    Geoscience and Remote Sensing, IEEE Transactions on
  • Publisher
    ieee
  • ISSN
    0196-2892
  • Type

    jour

  • DOI
    10.1109/TGRS.2009.2027694
  • Filename
    5247115
    • Link To Document
    https://search.isc.ac/dl/search/defaultta.aspx?DTC=49&DC=1408656