Transponder for use in locating avalanche victims
First Claim
1. 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 which generates a signal with a fundamental frequency of approximately 1000 MHz, said transponder comprising a receiver having a passive non-linear element which produces a higher harmonic by distortion of the fundamental frequency received from the search transmitter;
- metal parts connected to the non-linear element and which function as a receiver/transmitter antenna tuned to the frequency employed; and
a dielectric layer covering a side of the transponder facing the body, the thickness of the layer being substantially adapted for use with the fundamental and a reradiated harmonic frequency and to the dielectric constant of the layer, the size of the antenna being substantially adapted for use with said dielectric constant.
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Accused Products
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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Citations
6 Claims
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1. 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 which generates a signal with a fundamental frequency of approximately 1000 MHz, said transponder comprising a receiver having a passive non-linear element which produces a higher harmonic by distortion of the fundamental frequency received from the search transmitter;
- metal parts connected to the non-linear element and which function as a receiver/transmitter antenna tuned to the frequency employed; and
a dielectric layer covering a side of the transponder facing the body, the thickness of the layer being substantially adapted for use with the fundamental and a reradiated harmonic frequency and to the dielectric constant of the layer, the size of the antenna being substantially adapted for use with said dielectric constant. - View Dependent Claims (2, 3, 4, 5, 6)
- metal parts connected to the non-linear element and which function as a receiver/transmitter antenna tuned to the frequency employed; and
Specification