A HIGH-SENSITIVITY, ULTRA-BROADBAND RADIATION PROBE
S. Hopfer · 1972
This 1972 radiation probe measured microwave exposure with full-scale sensitivities from 100 microwatts to 10 milliwatts per square centimeter.
Plain English Summary
Researchers developed a highly sensitive radiation probe capable of measuring microwave exposure levels from 10 MHz to 20 GHz frequencies. The device has full-scale sensitivities ranging from 100 microwatts per square centimeter 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 uses Schottky diodes with resistive coupling into free space, and its full-scale sensitivities run from 100 microwatts to 10 milliwatts per square centimeter across 10 MHz to 20 GHz. Initial measurements on a prototype confirmed a flat characteristic through 18 GHz and a 400-fold improvement in sensitivity. 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.
Finding
Initial measurements have confirmed the flat characteristic through 18 GHz as well as a 400-fold improvement in sensitivity.
In their words
“Initial measurements have confirmed the flat characteristic through 18 GHz as well as a 400-fold improvement in sensitivity.”
Figures from the Original Paper
Diagram extracted from the original research document.
Show BibTeX
@article{a_high_sensitivity_ultra_broadband_radiation_probe_g5496,
author = {S. Hopfer},
title = {A HIGH-SENSITIVITY, ULTRA-BROADBAND RADIATION PROBE},
year = {1972},
}