Microwave dosimeter
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United States of America Patent
Stats
-
Jan 11, 1983
Grant Date -
N/A
app pub date -
Oct 8, 1980
filing date -
Oct 8, 1980
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A method and apparatus adapted to be worn by the user for measuring radio frequency (RF) and microwave energy absorbed by a person's body in the frequency range in which substantial reflection by the body normally occurs. Included is a broad band body-mounted antenna responsive to the frequency range of interest, a detector, and integrator for providing a signal correlated to the energy absorbed during a predetermined interval by the body of the user on which the antenna is mounted. Also included is a radiation absorber located between the antenna and the user's body. The absorber provides at least 3db attenuation for incident energy in the frequency range of interest for minimizing energy reflected by the user's body toward the antenna. This, in turn, minimizes measurement errors due to location of the antenna in close proximity to the body which has substantial energy-reflecting properties at microwave frequencies of interest. Also minimized are the errors due to changes in the inherent sensitivity of the antenna due to proximity to the user's body.
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