US3924237A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Horn antenna having v-shaped corrugated slots
Assignee: National Aeronautics and Space Administration
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Filing: 1974-07-24
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Granted: 1975-12-02
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Expires: 1994-07-24
Abstract
Abstract This invention is a corrugated horn antenna in which the corrugated surfaces of the antenna are formed by V-shaped slots. The depth of the slots is between 0.3125 and 0.625 wavelengths. For this range of depths the surface impedance is capacitive and operates in a cut-off mode. The V-shaped corrugated slots are more easily machined than previous slots and the resulting antenna is readily adaptable to unfurlable antennas for space applications.
Inventors
- 👤 James C Administrator Fletcher
- 👤 Jr Leon Peters
- 👤 Carl A Mentzer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 15:31
CPC Classifications
H; H01; H01Q; H01Q13/00; H01Q13/02; H01Q13/0208; H01Q13/0225
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
77 words
A horn antenna for directing electromagnetic energy in a given direction wherein energy diffracted from certain of the edges of the surfaces of said antenna is reduced, the improvement comprising means for controlling the illumination of said edges, said means including machined V-shaped corrugated slots formed in said surfaces, the density of said slots being of the order of ten per wavelength and the depth of the slots being between 0.3125 and 0.625 of the operating wavelength.
Claim 2
Dependent Claim
77 words
A horn antenna for directing electromagnetic energy in a given direction wherein energy diffracted from certain of the edges of the surfaces of said antenna is reduced, the improvement comprising means for controlling the illumination of said edges, said means including machined V-shaped corrugated slots formed in said surfaces, the density of said slots being of the order of ten per wavelength and the depth of the slots being between 0.3125 and 0.625 of the operating wavelength.
References Cited (Backward Citations)
US2912695A
Cited
US3216018A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-12-01 | 1979-06-02 | 1979-12-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-12-01 | 1983-06-02 | 1983-12-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-12-01 | 1987-06-02 | 1987-12-02 | $7700.00 | Window Closed / Lapsed |