Patent US5038147A successfully refreshed from Google Patents.
US5038147A
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Electronically scanned antenna
Assignee: Alcatel Espace Industries SA
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Filing: 1989-11-03
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Granted: 1991-08-06
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Expires: 2009-11-03
Abstract
Abstract An electronically scanned antenna comprising an array (11) of elementary sources, an energy-focusing reflector (10), and feed and control electronics, with the array (11) being situated in the focal zone of the reflector, and in which elementary sources that are not used simultaneously are grouped together in classes (Ci) in which only one source can be active at a time, with all of the sources in each class (Ci) being interconnected by a passive combiner (40) for that class. The invention is applicable in particular to space telecommunications.
Inventors
- 👤 Albert Cerro
- 👤 Michel Coustere
- 👤 Benoit Hanin
- 👤 Regis Lenormand
- 👤 Jean-Philippe Marre
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 13:41
CPC Classifications
H; H01; H01Q; H01Q3/00; H01Q3/26; H01Q3/2658
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
106 words
An electronically scanned antenna comprising an array of elementary sources, an energy-focusing reflector, and feed and control electronics, with the array being situated in the focal zone of the reflector, wherein said feed and control electronics comprises: a plurality of passive combiners each coupled to a respective group of said elementary sources in which only one elementary source can be active at any one time; and a divider between each elementary source and its respective combiner for dividing a signal from said each elementary source into a plurality of signals with each of said plurality of signals from each divider being coupled to a different combiner.
Claim 2
Dependent Claim
106 words
An electronically scanned antenna comprising an array of elementary sources, an energy-focusing reflector, and feed and control electronics, with the array being situated in the focal zone of the reflector, wherein said feed and control electronics comprises: a plurality of passive combiners each coupled to a respective group of said elementary sources in which only one elementary source can be active at any one time; and a divider between each elementary source and its respective combiner for dividing a signal from said each elementary source into a plurality of signals with each of said plurality of signals from each divider being coupled to a different combiner.
Claim 3
Dependent Claim
130 words
An electronically scanned antenna comprising an array of elementary sources, an energy-focusing reflector, and feed and control electronics, with the array being situated in the focal zone of the reflector, wherein said feed and control electronics comprises: a plurality of passive combiners each coupled to a respective group of said elementary sources in which only one elementary source can be active at any one time; beam forming means including a plurality of beam forming units for adjusting the phase and amplitude of signals received from said passive combiners; and a divider between each combiner and said beam forming means for dividing a signal from said each combiner into a plurality of signals, with each of said plurality of signals from each divider being coupled to a different beam forming unit.
Claim 4
Dependent Claim
130 words
An electronically scanned antenna comprising an array of elementary sources, an energy-focusing reflector, and feed and control electronics, with the array being situated in the focal zone of the reflector, wherein said feed and control electronics comprises: a plurality of passive combiners each coupled to a respective group of said elementary sources in which only one elementary source can be active at any one time; beam forming means including a plurality of beam forming units for adjusting the phase and amplitude of signals received from said passive combiners; and a divider between each combiner and said beam forming means for dividing a signal from said each combiner into a plurality of signals, with each of said plurality of signals from each divider being coupled to a different beam forming unit.
Claim 5
Dependent Claim
133 words
An electronically scanned antenna comprising an array of elementary sources, an energy-focusing reflector, and feed and control electronics, with the array being situated in the focal zone of the reflector, wherein said feed and control electronics comprises a plurality of passive combiners each coupled to a respective group of said elementary sources in which only one elementary source can be active at any one time, each said combiner including successive sets of microwave couplers with each coupler receiving two inputs and providing one output, with the couplers in a first of said successive sets receiving inputs from respective elementary sources and the couplers in each succeeding set receiving inputs from the outputs of the couplers in a previous set, with a last set comprising a single coupler for providing a combiner output signal.
Claim 6
Dependent Claim
133 words
An electronically scanned antenna comprising an array of elementary sources, an energy-focusing reflector, and feed and control electronics, with the array being situated in the focal zone of the reflector, wherein said feed and control electronics comprises a plurality of passive combiners each coupled to a respective group of said elementary sources in which only one elementary source can be active at any one time, each said combiner including successive sets of microwave couplers with each coupler receiving two inputs and providing one output, with the couplers in a first of said successive sets receiving inputs from respective elementary sources and the couplers in each succeeding set receiving inputs from the outputs of the couplers in a previous set, with a last set comprising a single coupler for providing a combiner output signal.
Claim 7
Dependent Claim
108 words
An electronically scanned antenna comprising an array of elementary sources, an energy-focusing reflector, and feed and control electronics, with the array being situated in the focal zone of the reflector, wherein said feed and control electronics comprises: a plurality of passive combiners each coupled to a respective group of said elementary sources in which only one elementary source can be active at any one time; and control means between said elementary sources and said passive combiners for selectively activating at any one time only one of the input signals to each passive combiner, said control means selectively activating a low noise amplifier associated with each said elementary source.
Claim 8
Dependent Claim
108 words
An electronically scanned antenna comprising an array of elementary sources, an energy-focusing reflector, and feed and control electronics, with the array being situated in the focal zone of the reflector, wherein said feed and control electronics comprises: a plurality of passive combiners each coupled to a respective group of said elementary sources in which only one elementary source can be active at any one time; and control means between said elementary sources and said passive combiners for selectively activating at any one time only one of the input signals to each passive combiner, said control means selectively activating a low noise amplifier associated with each said elementary source.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1994-08-05 | 1995-02-04 | 1995-08-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-08-05 | 1999-02-04 | 1999-08-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-08-05 | 2003-02-04 | 2003-08-06 | $7700.00 | Window Closed / Lapsed |