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A New Near-Zone Electric Field-Strength Meter

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Frank M. Greene · 1966

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Accurate near-zone electric field measurement tools developed in 1966 laid groundwork for modern EMF exposure assessment.

Plain English Summary

Summary written for general audiences

This 1966 technical report describes the development of a new instrument for measuring electric field strength in the near-zone, the area close to EMF sources where field patterns are complex and measurements are most critical. The research focused on creating more accurate measurement tools for electromagnetic fields at close distances from transmitting equipment.

Why This Matters

This technical development from 1966 represents an important milestone in our ability to accurately measure electromagnetic field exposure. Near-zone measurements are particularly crucial because this is where field strengths are highest and most variable - exactly where people often find themselves when using electronic devices or living near transmission equipment. The reality is that without precise measurement tools like the one described in this report, we cannot properly assess EMF exposure levels or establish meaningful safety standards. What this means for you is that the foundation for modern EMF measurement techniques traces back to pioneering work like this, which enabled researchers to begin documenting the field strengths we encounter in our daily lives from sources ranging from household appliances to broadcast antennas.

Exposure Information

Specific exposure levels were not quantified in this study.

Cite This Study
Frank M. Greene (1966). A New Near-Zone Electric Field-Strength Meter.
Show BibTeX
@article{a_new_near_zone_electric_field_strength_meter_g7017,
  author = {Frank M. Greene},
  title = {A New Near-Zone Electric Field-Strength Meter},
  year = {1966},
  
  
}

Quick Questions About This Study

Near-zone measurement captures electric field strength close to EMF sources, where fields are strongest and most complex. This region extends roughly one wavelength from the source, making accurate measurement technically challenging but critically important for exposure assessment.
The 1960s saw rapid expansion of radio, television, and radar systems, creating need for better measurement tools. Existing instruments couldn't accurately measure the complex field patterns that occur close to transmitting equipment, limiting safety assessments.
Near-zone fields change rapidly with distance and have complex patterns, while far-zone fields are more uniform and predictable. Near-zone measurements require specialized instruments because standard far-field assumptions don't apply in this region.
Electronic components were less sophisticated, and near-zone fields create measurement artifacts due to instrument interference with the field being measured. Developing meters that didn't distort the very fields they were measuring required innovative engineering approaches.
Accurate field measurement is fundamental to all EMF health research. Without reliable measurement tools like those developed in this era, researchers couldn't establish dose-response relationships or create meaningful exposure standards for the devices we use today.