Transponder for use in locating avalanche victims

Details Transponder for use in locating avalanche victims Transponder for use in locating avalanche victims

G - Physics

01

S

343/20

G01S 13/82 (2006.01) A62B 33/00 (2006.01) G01S 13/75 (2006.01)

Patent

CA 1152615

ABSTRACT OF THE DISCLOSURE A transponder to be carried on the body of a person for use in locating avalanche victims, which transponder is designed for cooperation with a search-transmitter and includes a receiver with a passive non-linear element which, out of the fundamental frequency received from the search transmitter, by distortion produces a higher harmonic, and which transponder contains metal parts which are connected to the non-linear element and function as a receiver/transmitter antenna tuned to the frequency employed, The transponder is characterized in that the side of the transpon- der facing the human body is covered with a dielectric layer the thickness of which is substantially adjusted, on the one hand, to a frequency of the magnitude of 1000 MHZ and, on the other hand, to the dielectric constant of the layer, and in that the size of the antenna is substantially adjusted to this dielectric constant.

350161

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