Modulated retroreflection system for secure communication and id

Telecommunications – Transmitter – Modulation by absorption – shielding – or reflecting

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342 6, 342 45, H01Q 1500, H04B 700, G01S 1378

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active

058191640

ABSTRACT:
A modulated retroreflection system for secure two-way communication and identification includes a transceiver at a first location and a transponder at a second location. The transponder receiving, modulating, and reflecting the signal back to the transceiver includes a retroreflector having a at least one reflective surface coated with an electro-responsive material. The electro-responsive material modulating the reflection coefficient of the reflective surface thereby modulating signals reflected by the surface. The transponder further includes a modulator electrically connected to the electro-responsive material for applying a modulated bias voltage thereby modulating the refractive index and consequently the electrical phase, and/or amplitude of the reflected signal.

REFERENCES:
patent: Re26548 (1969-03-01), Thomas
patent: 2872675 (1959-02-01), Kennaugh
patent: 3308464 (1967-03-01), Lewis
patent: 3417398 (1968-12-01), Lewis et al.
patent: 3757335 (1973-09-01), Gruenberg
patent: 3863064 (1975-01-01), Doyle et al.
patent: 4090204 (1978-05-01), Farhat
patent: 4209689 (1980-06-01), Linford et al.
patent: 4589740 (1986-05-01), Durremberger
patent: 4983021 (1991-01-01), Fergason
patent: 4987418 (1991-01-01), Kosowsky et al.
patent: 5245352 (1993-09-01), Nalos et al.
patent: 5247305 (1993-09-01), Hirata et al.
patent: 5254997 (1993-10-01), Cohn
patent: 5274379 (1993-12-01), Carbonneau et al.
patent: 5311186 (1994-05-01), Utsu et al.
patent: 5355241 (1994-10-01), Kelley
patent: 5424737 (1995-06-01), Lindell
patent: 5583507 (1996-12-01), D'lespo et al.
Proceedings of the Advanced Ceramic Technology for Electronic Applications onference, U.S. Army CECOM, Fort Monmouth, N.J., Sep. 28, 1993.

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