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DEVELOPMENT OF MAGNETIC NEAR-FIELD PROBES

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Frank M. Greene · 1975

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This 1975 research helped develop the measurement tools we still use to assess magnetic field exposures from modern devices.

Plain English Summary

Summary written for general audiences

This 1975 technical report by Frank M. Greene focused on developing specialized probes for measuring magnetic near-fields, which are the magnetic components of electromagnetic fields close to their sources. The research addressed fundamental measurement challenges in electromagnetics that remain relevant today for assessing EMF exposures from modern devices.

Why This Matters

While this may seem like ancient history in tech terms, Greene's work on magnetic near-field measurement laid crucial groundwork for how we assess EMF exposures today. The reality is that accurate measurement of magnetic fields close to sources - whether power lines, appliances, or wireless devices - remains technically challenging nearly 50 years later. This research represents the kind of foundational work that enables us to quantify the magnetic field exposures we face daily from everything from hair dryers to electric vehicles. What this means for you is that the measurement techniques developed in studies like this one directly influence how we understand and communicate EMF health risks. Without reliable measurement tools, we can't establish exposure baselines, validate safety standards, or conduct meaningful health studies.

Exposure Information

Specific exposure levels were not quantified in this study.

Cite This Study
Frank M. Greene (1975). DEVELOPMENT OF MAGNETIC NEAR-FIELD PROBES.
Show BibTeX
@article{development_of_magnetic_near_field_probes_g7281,
  author = {Frank M. Greene},
  title = {DEVELOPMENT OF MAGNETIC NEAR-FIELD PROBES},
  year = {1975},
  
  
}

Quick Questions About This Study

Magnetic near-field probes measure the magnetic component of electromagnetic fields very close to their sources, like power lines or electronic devices. These specialized instruments help scientists and engineers quantify magnetic field strength and patterns for safety assessments.
The 1970s saw growing concern about power line exposures and increasing use of electronic devices. Better measurement tools were needed to accurately assess magnetic field exposures and establish safety guidelines for workers and the public.
Near-field measurements capture magnetic fields very close to sources before they combine with electric fields to form electromagnetic waves. This provides more detailed information about local exposures than standard EMF meters measuring farther away.
These probes address issues like probe interference with the field being measured, spatial resolution problems, and frequency response limitations. They allow more accurate assessment of magnetic field strength and distribution patterns near sources.
The measurement principles developed then still guide how we assess magnetic exposures from modern sources like wireless chargers, electric vehicles, and smart home devices. Accurate measurement remains fundamental to EMF health research.