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US4356497A
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Non-dispersive array antenna and electronically scanning antenna comprising same
Assignee: Thales SA
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Filing: 1981-09-04
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Granted: 1982-10-26
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Expires: 2001-09-04
Abstract
Abstract Non-dispersive array antenna of the prism array type in which the primary dispersive input array and the secondary output array include an acute angle α between each other, made of a piling up of non-dispersive, monodimensional array antennas, in each of which the propagation between said arrays is guided. Application to electronic scanning antennas of the prism array type.
Inventors
- 👤 Michel Dudome
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 23:28
CPC Classifications
H; H01; H01Q; H01Q21/00; H01Q21/0006; H01Q21/0018
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
155 words
In a non-dispersive array antenna, comprising a dispersive primary array constituted of a superimposition of primary, monodimensional arrays, each fed via a phase shifter for allowing electronic scanning; a secondary array in the form of a panel having elementary sources on its inner and outer faces with passive phase shifters introduced between the two faces, each such phase shifter aligned with an inner and outer element, said secondary array including an acute angle α with said primary array; and an absorbent panel closing the dihedron defined between the two arrays: the improvements comprising parallel planes arranged between said primary and secondary array so as to provide ducts for guiding the propagation of waves between corresponding radiating elements belonging to said primary and secondary arrays respectively, said array antenna being thus made of piling up of a plurality of non-dispersive, monodimensional antennas, in which the propagation between the primary array and the secondary array is guided.
Claim 2
Dependent Claim
155 words
In a non-dispersive array antenna, comprising a dispersive primary array constituted of a superimposition of primary, monodimensional arrays, each fed via a phase shifter for allowing electronic scanning; a secondary array in the form of a panel having elementary sources on its inner and outer faces with passive phase shifters introduced between the two faces, each such phase shifter aligned with an inner and outer element, said secondary array including an acute angle α with said primary array; and an absorbent panel closing the dihedron defined between the two arrays: the improvements comprising parallel planes arranged between said primary and secondary array so as to provide ducts for guiding the propagation of waves between corresponding radiating elements belonging to said primary and secondary arrays respectively, said array antenna being thus made of piling up of a plurality of non-dispersive, monodimensional antennas, in which the propagation between the primary array and the secondary array is guided.
Claim 3
Dependent Claim
22 words
An array antenna as defined in claim 1, wherein each elementary monodimensional antenna forms a compact module which can be optimally reproduced.
Claim 4
Dependent Claim
45 words
An array antenna as defined in claim 2, wherein said primary array of a module is a slotted guide supplied by a travling wave, and said secondary array is double-faced with radiating elements on the inner and outer faces and phase shifter means positioned therebetween.
Claim 5
Dependent Claim
28 words
An array antenna as defined in claim 1, wherein the secondary array comprises dipoles on the inner face of the array and rotatable helices on the outer face.
Claim 6
Dependent Claim
43 words
An array antenna as defined in claim 2, wherein the primary array of a module is a line made on a dielectric substrate by photoengraving, with the radiating elements of the array being engraved on said substrate when they have a plane geometry.
Claim 7
Dependent Claim
23 words
An array antenna as defined in claim 2, wherein the secondary array of a module is engraved on a dielectric substrate by photoengraving.
Claim 8
Dependent Claim
51 words
An array antenna as defined in claim 1, for which the polarization of the waves entering or leaving the secondary array remains the same, wherein the assembly of the radiating elements of said secondary array and the passive phase shifters positioned therebetween is made by metallization of a single dielectric plate.
Claim 9
Dependent Claim
36 words
An array antenna as defined in one of the claims 1 or 2, wherein in the space of propagation between said primary and secondary array the polarization of the transmitted waves is indifferently vertical or horizontal.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1985-10-25 | 1986-04-26 | 1986-10-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-10-25 | 1990-04-26 | 1990-10-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-10-25 | 1994-04-26 | 1994-10-26 | $7700.00 | Window Closed / Lapsed |