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Patent US5289193A successfully refreshed from Google Patents.
US5289193A
Expired / Lapsed
US
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Reconfigurable transmission antenna
Assignee: Alcatel Espace Industries SA
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Filing: 1993-02-04
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Granted: 1994-02-22
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Expires: 2013-02-04
Abstract
Abstract The invention relates to a reconfigurable transmission antenna comprising a reflector (10) for energy focussing, and an array (11) of source elements situated in the focal region of the reflector, so that the electromagnetic field is synthesized in said region, wherein a spot (SPi) is the result of radiation from a number of sources that is fixed and identical for all the spots; any one source participating at any one time in radiating one spot at the most, and high-level switching being used to reconfigure the spots by selecting the sources that participate in a given spot. Application to the space telecommunications field in particular.
Inventors
- 👤 Regis Lenormand
- 👤 Didier Rene
- 👤 Christian Rigal
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 18:15
CPC Classifications
H; H01; H01Q; H01Q25/00; H01Q25/007
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
139 words
A reconfigurable multi-access multi-spot transmission antenna comprising: a reflector (10) for energy focussing, an array (11) of source elements situated in the focal region of the reflector, so that the electromagnetic field is synthesized in said region, said antenna being characterized in that each spot (SPi) is constituted by juxtaposing a fixed identical number n of beams from n sources; each of the sources delivering the power transmitted by the corresponding spot divided by the number n; any one source participating at any one time in radiating one spot at the most; and in that a matrix high-power amplifier receives input signals to be radiated by said reconfigurable multi-access multi-spot transmission antenna, and outputs corresponding amplified signals to a high-level switching matrix (24) which is provided to reconfigure each spot by selecting the sources that participate in the spot.
Claim 2
Dependent Claim
139 words
A reconfigurable multi-access multi-spot transmission antenna comprising: a reflector (10) for energy focussing, an array (11) of source elements situated in the focal region of the reflector, so that the electromagnetic field is synthesized in said region, said antenna being characterized in that each spot (SPi) is constituted by juxtaposing a fixed identical number n of beams from n sources; each of the sources delivering the power transmitted by the corresponding spot divided by the number n; any one source participating at any one time in radiating one spot at the most; and in that a matrix high-power amplifier receives input signals to be radiated by said reconfigurable multi-access multi-spot transmission antenna, and outputs corresponding amplified signals to a high-level switching matrix (24) which is provided to reconfigure each spot by selecting the sources that participate in the spot.
Claim 3
Dependent Claim
128 words
The antenna according to claim 1, characterized in that said antenna includes feed and control electronics comprising: m inputs (E 1 to E m ) corresponding to m spots delimiting m coverage areas on the surface of the earth; a variable amplifier (18) being disposed on each of the inputs; and a number n of channels; n corresponding to the number of sources per spot; each channel (vi) comprising: an amplifier stage (20) having m inputs and m outputs; a high-level switching and connection circuit (24) enabling a plurality of source elements each corresponding to a respective spot (SP1 . . . SPm); and p filters (25) disposed in series between the p outputs of the high-level switching and connection circuit (24) and p sources of the array.
Claim 4
Dependent Claim
50 words
The antenna according to claim 2, characterized in that the amplifier stage (20) comprises first and second generalized couplers (21 and 22) disposed on respective sides of amplifiers (23) disposed in parallel, so that a signal applied to the first input is output in amplified form on the first output.
Claim 5
Dependent Claim
78 words
The antenna according to claim 3, characterized in that the first and second generalized couplers (21 and 22) are respectively formed of a combination of hybrid couplers (25), so that each input of the first coupler (21) is distributed over all the amplifiers (23) and hence over all the outputs of the hybrid couplers of the first generalized coupler (21), the structure of the second generalized coupler (22) being the inverse of the structure of the first coupler.
Claim 6
Dependent Claim
26 words
An antenna according to claim 2 characterized in that said antenna includes at least one additional source (S'), wherein said additional source is an isolating source.
Claim 7
Dependent Claim
46 words
The antenna according to claim 2, characterized in that for all channels, said amplifier stage of said antenna only includes a single first generalized coupler (21), and a plurality of amplifiers (23) having respective outputs connected to a corresponding input of n second generalized couplers (22).
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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) | 1997-02-21 | 1997-08-23 | 1998-02-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2001-02-21 | 2001-08-23 | 2002-02-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2005-02-21 | 2005-08-23 | 2006-02-22 | $7700.00 | Window Closed / Lapsed |