DEVELOPMENT OF MAGNETIC NEAR-FIELD PROBES
Frank M. Greene · 1975
Accurate magnetic field measurement requires specialized probes, foundational research that enables modern EMF health studies.
Plain English Summary
This 1975 technical report by Frank M. Greene focused on developing specialized probes to measure magnetic near-fields around electromagnetic sources. The research addressed fundamental measurement challenges in electromagnetics, establishing methods for accurately detecting and quantifying magnetic field exposure in close proximity to EMF-generating devices.
Why This Matters
This foundational research represents a critical piece of the EMF measurement puzzle that often gets overlooked. The science demonstrates that accurate magnetic field measurement has been a recognized challenge since the 1970s, when researchers like Greene were developing the very tools we rely on today to assess exposure levels. What this means for you is that the magnetic fields from your household appliances, power lines, and electronic devices require specialized measurement techniques to properly quantify. The reality is that without reliable measurement methods, we cannot establish meaningful exposure standards or conduct credible health research. This technical groundwork laid the foundation for modern EMF assessment, making it possible to distinguish between safe and potentially harmful exposure levels in our daily environment.
Exposure Information
Specific exposure levels were not quantified in this study.
Study Details
To develop two portable magnetic-field-strength probes for assessing occupational exposure from industrial RF power sources operating within the frequency range 10 MHz to 40 MHz.
The probes consist of small, single-turn, balanced loop antennas 10-cm and 3.16-cm in diameter. Each...
The probes consist of small, single-turn, balanced loop antennas 10-cm and 3.16-cm in diameter. Thei...
The NBS magnetic-field probes respond essentially to only the magnetic-field component of an E-M radiation field. Commercially available E-M survey meters have virtually no magnetic-field response. Consequently, a substantial magnetic-field could be present in an E-M radiation field and the commercially manufactured meters would indicate a negligible hazard. Specialized magnetic-field-strength probes are mandatory to characterize the magnetic-field component of RF radiation sources operable from approximately 10 MHz to 300 MHz. The probes can be used to accurately measure magnetic near fields which exist within a few centimeters of an RF radiation source. Precision magnetic near field measurements are possible because of proper antenna and probe design, a thorough knowledge of measurement errors, and a detailed outline of procedures to virtually eliminate measurement errors.
Show BibTeX
@article{development_of_magnetic_near_field_probes_g4642,
author = {Frank M. Greene},
title = {DEVELOPMENT OF MAGNETIC NEAR-FIELD PROBES},
year = {1975},
}