8,700 Studies Reviewed. 87.0% Found Biological Effects. The Evidence is Clear.
Shield Your Body
Whole Body / General

A HIGH-SENSITIVITY, ULTRA-BROADBAND RADIATION PROBE

Bioeffects Seen

S. Hopfer · 1972

Share:

This 1972 radiation probe enabled precise measurement of microwave exposure levels comparable to modern wireless devices.

Plain English Summary

Summary written for general audiences

Researchers developed a highly sensitive radiation probe capable of measuring microwave exposure levels from 10 MHz to 20 GHz frequencies. The device can detect radiation intensities from 10 microwatts per square centimeter up to 10 milliwatts per square centimeter. This technical advancement provided scientists with better tools to accurately measure electromagnetic field exposure across a wide range of frequencies.

Why This Matters

This 1972 technical development represents a crucial milestone in EMF research capabilities. The probe's ability to measure exposures as low as 10 microwatts per square centimeter is significant because many everyday wireless devices operate in similar ranges. For context, your cell phone typically produces power densities of 1-10 microwatts per square centimeter at arm's length, while WiFi routers generate similar levels at typical distances. The 20 GHz upper frequency limit covers most consumer wireless technologies, including early microwave ovens and radar systems of that era. What makes this particularly relevant today is that accurate measurement has always been the foundation of credible EMF health research. Without precise instrumentation like this probe, researchers couldn't establish reliable exposure-response relationships or set meaningful safety standards.

Exposure Information

Specific exposure levels were not quantified in this study.

Cite This Study
S. Hopfer (1972). A HIGH-SENSITIVITY, ULTRA-BROADBAND RADIATION PROBE.
Show BibTeX
@article{a_high_sensitivity_ultra_broadband_radiation_probe_g5496,
  author = {S. Hopfer},
  title = {A HIGH-SENSITIVITY, ULTRA-BROADBAND RADIATION PROBE},
  year = {1972},
  
  
}

Quick Questions About This Study

The probe measured electromagnetic radiation from 10 MHz to 20 GHz, covering most microwave frequencies used in early wireless communications, radar systems, and microwave ovens of that era.
The probe could detect radiation levels as low as 10 microwatts per square centimeter, making it highly sensitive to weak electromagnetic fields similar to those from distant wireless sources.
The device had a full-scale maximum sensitivity of 10 milliwatts per square centimeter, allowing measurement of relatively high-intensity microwave sources like radar transmitters and microwave ovens.
An isotropic probe measures radiation equally from all directions, providing accurate readings regardless of the source's position relative to the detector, crucial for reliable EMF exposure assessment.
The probe's minimum detection of 10 microwatts per square centimeter matches typical cell phone radiation levels at arm's length, making it relevant for measuring consumer wireless device exposure.