Communications: radio wave antennas – Antennas – Balanced doublet - centerfed
Patent
1975-05-01
1979-03-13
Hubler, Malcolm F.
Communications: radio wave antennas
Antennas
Balanced doublet - centerfed
G01S 956
Patent
active
041445341
ABSTRACT:
A battlefield identification friend or foe (BIFF) system comprising a radar nit including a switch for selectively connecting an interrogation encoder to the modulator of a radar unit and a response decoder also located at the radar site. At a remote station is a transponder which includes an interrogation decoder which, when properly interrogated, activates the transponder/transmitter which then transmits a coded response message.
REFERENCES:
patent: 3051928 (1962-08-01), Sullivan
patent: 3267464 (1966-08-01), Shames
patent: 3336591 (1967-08-01), Michnik et al.
patent: 3573818 (1971-04-01), Lennon, Jr.
patent: 3603993 (1971-09-01), Follen
patent: 3858211 (1974-12-01), Litchford
Humpherys Bernarr H.
Prickett Michael J.
Fendelman H.
Hubler Malcolm F.
Rubens G. J.
Sciascia R. S.
The United States of America as represented by the Secretary of
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