Communications: radio wave antennas – Antennas – Balanced doublet - centerfed
Patent
1967-04-05
1978-08-15
Tubbesing, T.H.
Communications: radio wave antennas
Antennas
Balanced doublet - centerfed
343 18E, G01S 736, G01S 922
Patent
active
041076826
ABSTRACT:
An electronic counter counter-measure (ECCM) system for overcoming the effect of sidelobe repeater or stand off jammer type electronic counter measures (ECM). A primary monopulse type antenna is divided into four quadrants for transmission and reception with the received sum and difference signals being combined in a ferrite modulator. When ECM is detected, the reception pattern is switched so that only the difference signals from the modulator are utilized for the received energy. The power at the receiver in response to only difference signals, relative to the conventional power, allows a threshold to be established to allow blanking of the radar display in a narrow azimuth region about the true azimuth position of the jamming source. The displayed azimuth region that is affected by the jammer, is reduced to only a few degrees on either side of the jammer position.
REFERENCES:
patent: 3221328 (1965-11-01), Isch
patent: 3283322 (1966-11-01), Houda et al.
patent: 3838423 (1974-09-01), DiMatteo
patent: 3859661 (1975-01-01), Ruvin et al.
patent: 4042927 (1977-08-01), Helms
patent: 4044359 (1977-08-01), Applebaum et al.
Boucher Robert J.
Brackney, Jr. Robert L.
Adam Walter J.
Hughes Aircraft Company
MacAllister W. H.
Tubbesing T.H.
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