Passive sensing and encoding transponder

Details Passive sensing and encoding transponder Passive sensing and encoding transponder

1980-06-20

1982-08-17

Tubbesing, T. H.

Communications: radio wave antennas

Antennas

Balanced doublet - centerfed

343 65SS, G01S 1380

Patent

active

043452531

ABSTRACT:
A passive transponder for identifying objects remote to an interrogator includes an oscillator which generates a first frequency signal, a counter which divides the first frequency into a series of lower frequency signals, at least one multiplexer having a series of input terminals selected ones of which may be grounded to provide an identification code, and an encoder connected to the oscillator, the counter, the at least multiplexer, and an antenna for selecting which of the signals from the oscillator, counter, and at least one multiplexer shall be supplied to the antenna.

REFERENCES:
patent: 3705385 (1972-12-01), Batz
patent: 3754250 (1973-08-01), Bruner
patent: 3944928 (1976-03-01), Augenblick
patent: 4001822 (1977-01-01), Sterzer
patent: 4040053 (1977-08-01), Olsson
patent: 4075632 (1978-02-01), Baldwin et al.
patent: 4196418 (1980-04-01), Kip et al.
patent: 4242663 (1980-12-01), Slobodin

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