AN ATTEMPT TO EVALUATE THE EXPOSURE OF OPERATORS OF PORTABLE RADIOS AT 30 MHZ
Q. Balzano, O. Garay, F. R. Steel · 1979
Early research recognized the need to measure RF exposure from portable radios, highlighting occupational health concerns decades before cell phones.
Plain English Summary
This 1979 technical report by Q. Balzano attempted to measure radiofrequency exposure levels for operators of portable radios operating at 30 MHz. The research used phantom measurements to evaluate power density levels that radio operators experienced during typical use. This represents early efforts to quantify occupational RF exposure from two-way radio equipment.
Why This Matters
This study represents a crucial early attempt to quantify occupational RF exposure from portable radios, decades before cell phones became ubiquitous. The 30 MHz frequency range was commonly used for professional two-way radios, including police, fire, and emergency services communications. What makes this research particularly significant is its focus on operators who used these devices regularly as part of their jobs, potentially receiving far higher cumulative exposures than occasional users. The phantom measurement approach suggests researchers were already concerned about biological effects and wanted to simulate real-world exposure conditions. This type of occupational exposure assessment laid important groundwork for understanding how close-proximity RF devices affect the human body, research that became critical as wireless technology exploded in subsequent decades.
Figures from the Original Paper
Diagram extracted from the original research document.
Exposure Information
Specific exposure levels were not quantified in this study. Duration: 1 minute
Study Details
To evaluate the exposure of operators of portable radios at 30 MHz by measuring energy deposition in simulated human tissue.
Measurements were performed using simulated human tissue. Since no phantom materials have been devel...
Measurements showed no detectable temperature increases due to RF in the phantoms for a one minute e...
The deposition measurements performed using both telescopic and helical antennas show that maximum deposition rates well below 1 mW/g are caused by 6W, 30 MHz portable radios even at spacings between operator and antenna of only .1 inch. No thermal hazard is present for such low deposition rates.
Show BibTeX
@article{an_attempt_to_evaluate_the_exposure_of_operators_of_portable_radios_at_30_mhz_g4503,
author = {Q. Balzano and O. Garay and F. R. Steel},
title = {AN ATTEMPT TO EVALUATE THE EXPOSURE OF OPERATORS OF PORTABLE RADIOS AT 30 MHZ},
year = {1979},
}