Transponder for use in locating avalanche victims
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United States of America Patent
Stats
-
May 25, 1982
Grant Date -
N/A
app pub date -
Apr 18, 1980
filing date -
Apr 20, 1979
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A transponder adapted to be carried on the body of a person for use in locating avalanche victims is designed for cooperation with a search-transmitter and includes a receiver having a passive non-linear element which, by distortion, produces a higher harmonic from the fundamental frequency received from the search-transmitter and includes metal parts which are connected to the non-linear element and function as a receiver/transmitter antenna tuned to the frequency employed, whereby the side of the transponder facing the human body is covered with a dielectric layer the thickness of which is adjusted in accordance with a transmitted frequency of 1000 MHz and in accordance with the dielectric constant of the layer, and whereby the size of the antenna is adjusted in accordance with the dielectric constant.
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Cited Art Landscape
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