Sensors (Nov 2021)

Compact Exposimeter Device for the Characterization and Recording of Electromagnetic Fields from 78 MHz to 6 GHz with Several Narrow Bands (300 kHz)

  • Marco Xavier Rivera González,
  • Nazario Félix González,
  • Isabel López,
  • Juan Sebastián Ochoa Zambrano,
  • Andrés Miranda Martínez,
  • Ceferino Maestú Unturbe

DOI
https://doi.org/10.3390/s21217395
Journal volume & issue
Vol. 21, no. 21
p. 7395

Abstract

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A novel compact device with spectrum analyzer characteristics has been designed, which allows the measuring of the maximum power received in multiple narrow frequency bands of 300 kHz, recording the entire spectrum from 78 MHz to 6 GHz; the device is capable of measuring the entire communications spectrum and detecting multiple sources of electromagnetic fields using the same communications band. The proposed device permits the evaluation of the cross-talk effect that, in conventional exposimeters, generates a mistake estimation of electromagnetic fields. The device was calibrated in an anechoic chamber for far-fields and was validated against a portable spectrum analyzer in a residential area. A strong correlation between the two devices with a confidence higher than 95% was obtained; indicating that the device could be considered as an important tool for electromagnetic field studies.

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