Passive transmitter including parametric device

Details Passive transmitter including parametric device Passive transmitter including parametric device

1980-02-05

1982-02-02

Ng, Jin F.

Telecommunications

Transmitter and receiver at same station

455 20, 340539, 343 65SS, H04B 150

Patent

active

043143733

ABSTRACT:
A passive transmitter incorporates a parametric device, e.g. a varactor diode. A tuned circuit derives energy received from a source of radiowaves, and is coupled to pump the varactor diode. The varactor diode produces a subharmonic output. Means are coupled to the varactor diode to modulate the subharmonic signal, and the modulated subharmonic output may be transmitted without amplification.

REFERENCES:
patent: 2607004 (1952-08-01), Harris
patent: 2851592 (1958-09-01), Webster, Jr.
patent: 3172101 (1965-03-01), Kingsford-Smith
patent: 3182314 (1965-05-01), Kleist et al.
patent: 3182315 (1965-05-01), Sweeney
patent: 3609741 (1971-09-01), Miller
patent: 4019181 (1977-04-01), Olsson et al.

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