Communications: radio wave antennas – Antennas – Balanced doublet - centerfed
Patent
1977-10-20
1978-10-17
Buczinski, S. C.
Communications: radio wave antennas
Antennas
Balanced doublet - centerfed
343 16R, 343100SA, 343854, G01S 942, G01S 902
Patent
active
041212096
ABSTRACT:
A displaced-phase-center antenna technique which compensates accurately for he motion of an airborne radar system in both the boresight direction of the antenna and in the direction normal to the boresight. An antenna system comprising a broadside array of endfire arrays forms four receive beams which are displaced from each other in both the boresight direction and in the direction normal to the boresight. These four beams are used to produce signals which correspond to signals from two receive beams with phase centers having a separation equal in magnitude and direction to the aircraft's motion during the interpulse period. A signal scattered from a fixed object on a first transmitted pulse and received in one of the two receive beams will have the same phase characteristic as a signal scattered from the same fixed object on a subsequent pulse and received in the other receive beam. Upon proper delay of the first received signal, the returns from the fixed object may be cancelled.
REFERENCES:
patent: 3364490 (1968-01-01), Hannan
patent: 3380053 (1968-04-01), Connolly
patent: 3438030 (1969-04-01), Dickey, Jr.
patent: 3480958 (1969-11-01), Tcheditch
patent: 3806924 (1974-04-01), Applebaum
patent: 3893117 (1975-07-01), Nirasawa
Buczinski S. C.
Daubenspeck William C.
Schneider Philip
Sciascia R. S.
The United States of America as represented by the Secretary of
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