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

Abstract

Overview

A revolutionary compact device, functioning as a spectrum analyzer, has been developed to measure the maximum power received across multiple narrow frequency bands (300 kHz). This device efficiently records the full spectrum ranging from 78 MHz to 6 GHz, and is adept at measuring the complete communications spectrum while detecting various electromagnetic field sources within the same communications band.

Findings

• The device showcases the ability to evaluate cross-talk effects that often result in inaccurate electromagnetic field estimations in conventional exposimeters.
• It underwent calibration in an anechoic chamber for far-fields and validation against a portable spectrum analyzer in a residential area, demonstrating high reliability with a correlation confidence over 95%.
• Equipped to measure approximately 19,500 narrow bands within the specified frequency range, it shows comparable results to spectrum analyzers with a significant correlation factor of 0.9682.

Conclusion

This compact exposimeter, mirroring a spectrum analyzer's features without sacrificing the advantages of traditional exposimeters, stands as a critical instrument for research into electromagnetic field safety. Its one second measurement capability of the entire radioelectric spectrum, although less sensitive to quick variations in EMF, indicates potential for improvement by focusing measurements on chosen communication bands. Future projections include its application in field surveys aimed at establishing an EMF sensor network for epidemiological studies focused on EMF exposure risks.