Coded coherent transponder

Details Coded coherent transponder Coded coherent transponder

1979-01-12

1980-08-19

Tubbesing, T. H.

Communications: radio wave antennas

Antennas

Balanced doublet - centerfed

G01S 956

Patent

active

042186803

ABSTRACT:
A transponder including a receiver and transmitter for receiving an interrogation signal and transmitting a coherent response with circuitry for modulating the coherent response to include a predetermined coded complex phase and/or amplitude shift therein to convey information, such as the identity of the transponder.

REFERENCES:
patent: 2890449 (1959-06-01), Pickles et al.
patent: 3654554 (1972-04-01), Cook
patent: 3716856 (1973-02-01), Beguin
patent: 3964024 (1976-06-01), Hutton et al.
patent: 3996587 (1976-12-01), Rosen
patent: 4075632 (1978-02-01), Baldwin et al.
patent: 4114151 (1978-09-01), Denne et al.

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