US3739391A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Metallized channel guide antenna
Assignee: United States Department of the Air Force
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Filing: 1972-06-12
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Granted: 1973-06-12
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Expires: 1992-06-12
Abstract
Abstract A metallized channel guide antenna is utilized for providing coverage in a sector near the horizon. The antenna has a dielectric slab with metallized sides and bottom forming a waveguide. The waveguide is mounted a fixed distance above a cylindrical ground plane and in combination therewith results in coverage at the horizon.
Inventors
- 👤 W Mavroides
- 👤 R Mailloux
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 10:42
CPC Classifications
H; H01; H01Q; H01Q1/00; H01Q1/36; H01Q1/38
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
123 words
A metallized channel guide antenna comprised of a dielectric slab having first and second ends, a rectangular cross section, first and second sides, and a bottom, said first and second sides, and said bottom being metallized, said second end having a preselected tpaer to efficiently permit launching of radiation therefrom, a feed connected to said first end, said feed receiving radio frequency energy and launching a surface wave in said dielectric, a cylindrical ground plane below the combination of said dielectric slab and said feed, said combination being spaced a preselected distance from said cylindrical ground plane so that the energy scattered from said cylindrical ground plane reinforces the radiation at the horizon to provide a sector type beam with nearly constant gain.
Claim 2
Dependent Claim
123 words
A metallized channel guide antenna comprised of a dielectric slab having first and second ends, a rectangular cross section, first and second sides, and a bottom, said first and second sides, and said bottom being metallized, said second end having a preselected tpaer to efficiently permit launching of radiation therefrom, a feed connected to said first end, said feed receiving radio frequency energy and launching a surface wave in said dielectric, a cylindrical ground plane below the combination of said dielectric slab and said feed, said combination being spaced a preselected distance from said cylindrical ground plane so that the energy scattered from said cylindrical ground plane reinforces the radiation at the horizon to provide a sector type beam with nearly constant gain.
Claim 3
Dependent Claim
22 words
A metallized channel guide antenna as described in claim 1 including insulating means to space said combination from said cylindrical ground plane.
Claim 4
Dependent Claim
18 words
A metallized channel guide antenna as described in claim 1 wherein said feed is comprised of a waveguide.
Claim 5
Dependent Claim
18 words
A metallized channel guide antenna as described in claim 1 wherein said feed is comprised of a horn.
Claim 6
Dependent Claim
26 words
A metallized channel guide antenna as described in claim 1 wherein the metallized bottom of said dielectric slab is positioned adjacent to said cylindrical ground plane.
References Cited (Backward Citations)
US2648002A
Cited
US3392396A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-06-11 | 1976-12-11 | 1977-06-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-06-11 | 1980-12-11 | 1981-06-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-06-11 | 1984-12-11 | 1985-06-12 | $7700.00 | Window Closed / Lapsed |