INVESTIGATION OF RF RADIATION AS A SECONDARY PHENOMENON FOR USE IN CHECKOUT.
Final technical documentary rept.,
SYSTEMS RESEARCH LABS INC DAYTON OHIO
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The emission of radio-frequency rf radiation was studied over a range of frequencies from .15 to 400 megacycles per second Mcsec for small gaps of .5 to 10 mils. The electrodes were .050-inch in diameter with polished plane ends which formed the gap. Most of the work reported was done in air at atmospheric pressure with nickel electrodes although argon gas and gold, aluminum, and copper electrodes were employed. Considerable attention was given to shielding, and the effect of receiver and generator circuitry. The effect of antennas and cables were also studied in relation to rf radiation emission and reception. Radiation from malfunctioning systems is attributed to a brush type discharge across very small discontinuities within the electrical parts. These discontinutities in a number of cases were found to be essentially contact, i.e. less than a few thousand angstroms. The mechanism causing breakdown was found to be the avalanche type with the involvement of secondary electronic emission.