US4024543A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Parabolic antenna
Assignee: Individual
•
Filing: 1976-07-23
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Granted: 1977-05-17
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Expires: 1996-07-23
Abstract
Abstract An antenna for "frequency-re-use" that is provided with more than two parabolic cylinder surfaces (as reflectors), having in pairs common line foci, which foci intersect or cross each other, and having in pairs common symmetry planes.
Inventors
- 👤 Vaclav Josef Vokurka
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 15:31
CPC Classifications
H; H01; H01Q; H01Q19/00; H01Q19/10; H01Q19/18; H01Q19/19; H01Q19/195; H01Q19/20
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
85 words
An antenna, comprising a number of parabolic cylinder surfaces as reflectors, which are mounted confocally with a common plane of symmetry and a radiator that can emit a substantially plane wave, whose plane is substantially perpendicular to the plane of symmetry of the reflectors next to the radiator in the path of rays, wherein the antenna comprises more than two substantially parabolic cylinder surfaces, each pair of which has in common one line-focus and one plane of symmetry, the line-foci intersecting or crossing each other.
Claim 2
Dependent Claim
85 words
An antenna, comprising a number of parabolic cylinder surfaces as reflectors, which are mounted confocally with a common plane of symmetry and a radiator that can emit a substantially plane wave, whose plane is substantially perpendicular to the plane of symmetry of the reflectors next to the radiator in the path of rays, wherein the antenna comprises more than two substantially parabolic cylinder surfaces, each pair of which has in common one line-focus and one plane of symmetry, the line-foci intersecting or crossing each other.
Claim 3
Dependent Claim
15 words
An antenna according to claim 1, wherein the line-foci intersect or cross each other perpendicularly.
References Cited (Backward Citations)
US2703506A
Cited
US3953858A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-05-16 | 1980-11-15 | 1981-05-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-05-16 | 1984-11-15 | 1985-05-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-05-16 | 1988-11-15 | 1989-05-17 | $7700.00 | Window Closed / Lapsed |