Communications: radio wave antennas – Antennas – With coupling network or impedance in the leadin
Patent
1979-12-26
1981-08-11
Lieberman, Eli
Communications: radio wave antennas
Antennas
With coupling network or impedance in the leadin
343100LE, H01Q 326
Patent
active
042837294
ABSTRACT:
An open array antenna having a plurality of columns of radiating elements and a feed network, said feed network having a sum channel, a difference channel, and a sidelobe suppression channel formed in common in an input power divider and first, second, third and fourth power dividers, said power dividers connected in a corporate arrangement for providing equal length paths of minimum length to the columns of radiating elements, said power dividers comprising a plurality of hybrids having preselected coupling ratios and interconnections to form the input power divider with input ports for sum, difference, and SLS RF power, and to output sum, difference, difference minus sum, and SLS amplitudes to the first and second power dividers, and sum, difference and SLS amplitudes to the third and fourth power dividers, the hybrids of the first and second power dividers forming tapered sum and SLS amplitudes and forming tapered difference power by selectively combining the difference minus sum amplitudes to the difference amplitudes as a control for the difference amplitudes to provide power for a difference pattern which is independent of the amplitudes for the sum and SLS pattern excitations for a preselected number of the columns of radiating elements and the hybrids of the third and fourth power dividers forming substantially independent tapered sum, difference, and SLS amplitude excitations for the remaining columns of radiating elements, said sum, difference and SLS amplitude excitations of the columns of radiating elements combining to form sum, difference, and SLS beam patterns.
REFERENCES:
patent: 3276018 (1966-09-01), Butler
patent: 3631503 (1971-12-01), Tang
patent: 4124852 (1978-11-01), Steudel
Comfort James T.
Grossman Rene E.
Lieberman Eli
Sharp Melvin
Texas Instruments Incorporated
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