US3631502A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Corrugated horn antenna
Assignee: Ohio State University Research Foundation
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Filing: 1965-10-21
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Granted: 1971-12-28
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Expires: 1985-10-21
Abstract
Abstract A horn type of antenna for the propagation of electromagnetic energy having a modified structure for the reduction of backlobes and sidelobes in the radiated beam by controlling the illumination of the E-plane edges. Specifically, the control of illumination of the E-plane edges is achieved by electrically modifying the walls of the horn having an E-plane edge as an element.
Inventors
- 👤 Leon Peters Jr
- 👤 Richard E Lawrie
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 09:40
CPC Classifications
H; H01; H01Q; H01Q13/00; H01Q13/02; H01Q13/0208; H01Q13/0225
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
107 words
An antenna including a pyramidal horn structure having a flare angle less than 90* for directing the electromagnetic energy in a given direction and wherein energy is diffracted from certain of the surfaces of said structure, the improvement comprising means for controlling the illumination of said surfaces, said means including corrugated slots formed in said surface perpendicular to the transverse E vector and the iris of said horn; wherein the depth of said slots is defined by and the slOt width and spacing is defined by with t much less than g, where g is the slot width and t is the wall thickness of the corrugations.
Claim 2
Dependent Claim
107 words
An antenna including a pyramidal horn structure having a flare angle less than 90* for directing the electromagnetic energy in a given direction and wherein energy is diffracted from certain of the surfaces of said structure, the improvement comprising means for controlling the illumination of said surfaces, said means including corrugated slots formed in said surface perpendicular to the transverse E vector and the iris of said horn; wherein the depth of said slots is defined by and the slOt width and spacing is defined by with t much less than g, where g is the slot width and t is the wall thickness of the corrugations.
Claim 3
Dependent Claim
25 words
An antenna as set forth in claim 1 wherein said slot corrugated surface further comprises corrugations protruding into said structure to create a reactive surface.
Claim 4
Dependent Claim
32 words
An antenna as set forth in claim 2 wherein said slot corrugations are vanishingly thin and wherein the energy reflected from the base of the slots is limited to the TEM mode.
Claim 5
Dependent Claim
34 words
An antenna as set forth in claim 1 wherein the reactance of said corrugated slot is given by where g spacing between corrugations t wall thickness of corrugations d depth of corrugations and wherein
Claim 6
Dependent Claim
18 words
An antenna as set forth in claim 1 wherein the walls of said corrugated slots are vanishingly thin.
References Cited (Backward Citations)
US3274604A
Cited
US3055004A
Cited
US3212096A
Cited
US3216018A
Cited
US3140491A
Cited
US3274603A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-12-27 | 1975-06-28 | 1975-12-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-12-27 | 1979-06-28 | 1979-12-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-12-27 | 1983-06-28 | 1983-12-28 | $7700.00 | Window Closed / Lapsed |