Communications: radio wave antennas – Antennas – Balanced doublet - centerfed
Patent
1984-09-10
1985-06-25
Blum, Theodore M.
Communications: radio wave antennas
Antennas
Balanced doublet - centerfed
343380, G01S 316, G01S 328
Patent
active
045257167
ABSTRACT:
The present invention relates to an antenna sidelobe or interference cancellation arrangement including an antenna with a monopulse feed, for providing a sum and difference pattern signal, and an omnidirectional feed for providing a flat pattern signal. The flat pattern signal is used to appropriately shift the lobes of the received difference pattern signal in a first canceller section to substantially correspond to the location of the lobes of the received sum pattern signal. The shifted difference pattern signal is then used to cancel interference in the sum pattern signal in a second canceller section to generate an output signal at the cancellation arrangement which is relatively interference free over a wide band of frequencies.
REFERENCES:
patent: 3094695 (1963-06-01), Jahn
patent: 3202990 (1965-08-01), Howells
patent: 3803624 (1974-04-01), Kinsey
patent: 3815140 (1974-06-01), Buehler et al.
patent: 3876947 (1975-04-01), Giraudon
patent: 4280128 (1981-07-01), Masak
patent: 4320535 (1982-03-01), Brady et al.
patent: 4376940 (1983-03-01), Miedema
Rassweiler et al., 1978 Midcon, Dec. 12-14, 1978, Dallas, Tex., pp. 1-4.
Mayhan, AP-S, 1979, Seattle, Wash., vol. 1, pp. 190-193.
Bowers et al., AP-S, 1980, Quebec, Canada, vol. 1, pp. 114-117.
AT&T Bell Laboratories
Blum Theodore M.
Pfeifle Erwin W.
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