US3623115A
Expired / Lapsed
US
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Directional antenna
Assignee: Telefunken Patentverwertungs GmbH
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Filing: 1969-11-18
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Granted: 1971-11-23
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Expires: 1989-11-18
Abstract
Abstract A feeder waveguide for a parabolic antenna formed from a seamless aluminum tube having an elliptical cross section and walls of continuously varying thickness. The wall thickness of the waveguide is smallest along the axes of its elliptical cross section, and is greatest at points lying between the major and minor axes of the elliptical cross section. The waveguide has a horn formed in one of its ends and a connecting flange formed in the other of its ends.
Inventors
- 👤 Erich Schuttloffel
- 👤 Hans-Dieter Kuhne
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 22:35
CPC Classifications
H; H01; H01Q; H01Q19/00; H01Q19/10; H01Q19/12; H01Q19/13; H01Q1/00; H01Q1/12; H01Q1/125
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
106 words
A directional antenna comprising, in combination: a. a parabolic reflector having a circular aperture with a diameter D and defining a focal length f, the ratio f/D being between 0.4 and 0.25; b. a feeder waveguide formed from a seamless tube constructed of aluminum and having an elliptical inner cross section and walls of continuously varying thickness, said wall thickness being least along the major and minor axes of the elliptical cross section and greatest at points lying between the major and minor axes of the elliptical cross section; and c. horn means formed integrally in one end of said waveguide for illuminating said parabolic reflector.
Claim 2
Dependent Claim
106 words
A directional antenna comprising, in combination: a. a parabolic reflector having a circular aperture with a diameter D and defining a focal length f, the ratio f/D being between 0.4 and 0.25; b. a feeder waveguide formed from a seamless tube constructed of aluminum and having an elliptical inner cross section and walls of continuously varying thickness, said wall thickness being least along the major and minor axes of the elliptical cross section and greatest at points lying between the major and minor axes of the elliptical cross section; and c. horn means formed integrally in one end of said waveguide for illuminating said parabolic reflector.
Claim 3
Dependent Claim
46 words
A directional antenna as defined in claim 1 wherein the other end of said waveguide is constituted by a connecting flange means for permitting the waveguide to be connected to a suitable system, and wherein said reflector and said waveguide are combined into a structural unit.
Claim 4
Dependent Claim
35 words
A directional antenna as defined in claim 2 further including mounting means for adjustably mounting said reflector and said waveguide, said reflector and said waveguide being combined into a structural unit with said mounting means.
Claim 5
Dependent Claim
17 words
A directional antenna as defined in claim 3 wherein said reflector is constructed of a light material.
Claim 6
Dependent Claim
27 words
A directional antenna as defined in claim 4 wherein said mounting means has means for mounting said waveguide attached near to the periphery of said parabolic reflector.
Claim 7
Dependent Claim
24 words
A directional antenna as defined in claim 4 wherein said parabolic reflector has passage means in its periphery in which said waveguide is held.
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) | 1974-11-22 | 1975-05-24 | 1975-11-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-11-22 | 1979-05-24 | 1979-11-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-11-22 | 1983-05-24 | 1983-11-23 | $7700.00 | Window Closed / Lapsed |