Communications: radio wave antennas – Antennas – Balanced doublet - centerfed
Patent
1980-09-02
1983-03-15
Hubler, Malcolm F.
Communications: radio wave antennas
Antennas
Balanced doublet - centerfed
343727, G01S 1344, H01Q 2129
Patent
active
043769373
ABSTRACT:
A common antenna system for a primary and a secondary radar transceiver, designed for monitoring air traffic, has a primary feeder or source connected to a primary-radar transceiver and terminating in a horn confronting a reflector, this source including two transverse probes connected to a secondary-radar transceiver which also communicates with a pair of ancillary feeders flanking the horn in an azimuthal plane. The horn is also flanked by two dipoles, closer than the ancillary feeders, delivering a difference signal of a monopulse channel to an angular-deviation-measuring receiver to which an incoming sum signal of the same channel is fed from the probes by way of the secondary-radar transceiver. The signals of the monopulse channel are emitted by transponders aboard an aircraft in response to interrogation signals sent out and received back by the probes in a radiation pattern blanked for the most part by control signals transmitted and received by the ancillary feeders, these control signals leaving free an interrogation arc of limited azimuthal extent; the signals of the monopulse channel define a narrower angular-deviation-measuring arc for localizing an aircraft within the interrogation arc.
REFERENCES:
patent: 3032759 (1962-05-01), Ashby
patent: 3122737 (1964-02-01), Setrin
patent: 3296615 (1967-01-01), Page et al.
patent: 3311912 (1967-03-01), Page
patent: 3312970 (1967-04-01), Bond
patent: 3618091 (1971-11-01), Butler
patent: 3688313 (1972-08-01), Kern
patent: 3893116 (1975-07-01), Hudspeth et al.
patent: 3916414 (1975-10-01), Trigon et al.
"Thomson-CSF"
Hubler Malcolm F.
Ross Karl F.
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