US3732571A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Microwave horn aerial with spiral corrugated inner surface
Assignee: BAE Systems Electronics Ltd
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Filing: 1971-11-05
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Granted: 1973-05-08
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Expires: 1991-11-05
Abstract
Abstract A microwave horn aerial is corrugated on its inner surface by being formed, e.g. by a screw cutting operation with a single start spiro helical groove or by moulding on a mandrel. In the latter case manufacture is relatively easy because the mandrel can be withdrawn by unscrewing it.
Inventors
- 👤 N Neale
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 18:25
CPC Classifications
H; H01; H01Q; H01Q13/00; H01Q13/02; H01Q13/0283; H01Q13/0291; H01Q13/0208
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
48 words
A corrugated microwave horn aerial comprising a horn body having an inner surface defining a tapered waveguide, and means on said inner surface for reduction of side lobes and frequency distortion of microwave energy propagated therefrom, said means comprising at least one spiro-helical projection on said inner surface.
Claim 2
Dependent Claim
48 words
A corrugated microwave horn aerial comprising a horn body having an inner surface defining a tapered waveguide, and means on said inner surface for reduction of side lobes and frequency distortion of microwave energy propagated therefrom, said means comprising at least one spiro-helical projection on said inner surface.
Claim 3
Dependent Claim
19 words
A corrugated microwave horn aerial as defined in claim 1 wherein said projection is of substantially uniform height throughout.
Claim 4
Dependent Claim
44 words
A corrugated microwave horn aerial comprising a horn body having an inner surface defining a tapered length of waveguide adapted to be coupled at the smaller end thereof to a source of microwave energy, and at least one spiro-helical projection on said inner surface.
Claim 5
Dependent Claim
44 words
A corrugated microwave horn aerial comprising a horn body having an inner surface defining a tapered length of waveguide adapted to be coupled at the smaller end thereof to a source of microwave energy, and at least one spiro-helical projection on said inner surface.
Claim 6
Dependent Claim
28 words
A corrugated microwave horn aerial as defined in claim 3 wherein said projection extends substantially from said smaller end of the waveguide to the opposite larger end thereof.
Claim 7
Dependent Claim
19 words
A corrugated microwave horn aerial as defined in claim 4 wherein said projection is of substantially uniform height throughout.
Claim 8
Dependent Claim
19 words
A corrugated microwave horn aerial as defined in claim 3 wherein said projection is of substantially uniform height throughout.
References Cited (Backward Citations)
US2863148A
Cited
US2856605A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-05-07 | 1976-11-06 | 1977-05-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-05-07 | 1980-11-06 | 1981-05-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-05-07 | 1984-11-06 | 1985-05-08 | $7700.00 | Window Closed / Lapsed |