US3742512A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Directional antenna system with conical reflector
Assignee: BAE Systems Space & Mission Systems Inc
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Filing: 1970-12-18
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Granted: 1973-06-26
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Expires: 1990-12-18
Abstract
Abstract A directional antenna system is disclosed and generally includes a passive conical reflector and an active feed assembly comprising a plurality of effective half-wave dipoles or element radiators and extending perpendicular thereto. The dipoles are simultaneously excited by in-phase signal energy so as to produce electromagnetic wave energy which is directed to the conical reflector and reflected therefrom in a direction parallel with the axis thereof.
Inventors
- 👤 R Munson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 04:16
CPC Classifications
H; H01; H01Q; H01Q19/00; H01Q19/10; H01Q19/12; H01Q19/15
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
172 words
An active feed assembly for use in a directional antenna system having a passive reflector element such as a conical reflector, said assembly comprising: and elongated support member of thin dielectric material longitudinally positionable long the axis of said conical reflector; a plurality of elongated electrically conductive first elements mounted to one side of said support member and axially extending in a direction substantially perpendicular thereto; a plurality of elongated electrically conductive second elements mounted to an opposite side of said support member, insulated from said first elements and axially extending in a direction substantially perpendicular to said support member; and means for electrically feeding said conductive elements including first and second feed means respectively, electrically connected to said first and second conductive elements, said first and second feed means being thin metallic cladded leads on opposite sides of said thin dielectric support member, each of said feed means being aligned with one another and dimensioned so as to transfer substantially equal phased signals to said fIrst and second conductive elements, respectively.
Claim 2
Dependent Claim
172 words
An active feed assembly for use in a directional antenna system having a passive reflector element such as a conical reflector, said assembly comprising: and elongated support member of thin dielectric material longitudinally positionable long the axis of said conical reflector; a plurality of elongated electrically conductive first elements mounted to one side of said support member and axially extending in a direction substantially perpendicular thereto; a plurality of elongated electrically conductive second elements mounted to an opposite side of said support member, insulated from said first elements and axially extending in a direction substantially perpendicular to said support member; and means for electrically feeding said conductive elements including first and second feed means respectively, electrically connected to said first and second conductive elements, said first and second feed means being thin metallic cladded leads on opposite sides of said thin dielectric support member, each of said feed means being aligned with one another and dimensioned so as to transfer substantially equal phased signals to said fIrst and second conductive elements, respectively.
Claim 3
Dependent Claim
118 words
A directional antenna system comprising: a passive reflector having a predetermined axis; an elongated support member positioned along the axis of said reflector; means for supporting said member along said axis; and an active feed assembly including a plurality of half-wave dipoles insulated with respect to one another and mounted to said support member and spaced longitudinally along said support member, said active feed assembly including means for electrically feeding said dipoles at equal phase including a plurality of relatively thin and flat conductive leads mounted to said support member and wherein said support member is of dielectric material, said support member and said electrical feeding means each comprising part of a sheet of parallel plate transmission line.
Claim 4
Dependent Claim
118 words
A directional antenna system comprising: a passive reflector having a predetermined axis; an elongated support member positioned along the axis of said reflector; means for supporting said member along said axis; and an active feed assembly including a plurality of half-wave dipoles insulated with respect to one another and mounted to said support member and spaced longitudinally along said support member, said active feed assembly including means for electrically feeding said dipoles at equal phase including a plurality of relatively thin and flat conductive leads mounted to said support member and wherein said support member is of dielectric material, said support member and said electrical feeding means each comprising part of a sheet of parallel plate transmission line.
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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) | 1976-06-25 | 1976-12-25 | 1977-06-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-06-25 | 1980-12-25 | 1981-06-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-06-25 | 1984-12-25 | 1985-06-26 | $7700.00 | Window Closed / Lapsed |