Passive transponder for locating avalanche victims

Details Passive transponder for locating avalanche victims Passive transponder for locating avalanche victims

1985-07-23

1987-04-07

Tubbesing, T. H.

Communications: directive radio wave systems and devices (e.g.,

Radar transponder system

Radar transponder only

342 22, 342193, G01S 1380

Patent

active

046564780

ABSTRACT:
This transponder includes a dielectric support, an antenna and a covering layer. The central portion of the antenna forms a self induction loop which, together with the junction capacity of a non-linear component serving to close the loop, provides a circuit resonating at the frequency at which the transponder receives its energy. The antenna radiates energy at double this frequency which energy may be detected by a receiver.

REFERENCES:
patent: 3373425 (1968-03-01), Barischoff
patent: 4314373 (1982-02-01), Sellers
patent: 4331957 (1982-05-01), Enander et al.

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