US4439748A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Corrugated waveguide or feedhorn assembled from grooved pieces
Assignee: AT&T Inc
•
Filing: 1982-06-28
•
Granted: 1984-03-27
•
Expires: 2002-06-28
Abstract
Abstract The present invention relates to a rectangular corrugated waveguide or feedhorn wherein a plurality of adjacent grooves of a predetermined depth and cross-section are formed, preferably by numerical machining, in a major exposed surface of each of four plates of an electrically conductive material. The four plates are then secured together to form a rectangular corrugated passage therebetween where the ends of the line of grooves in one plate substantially meet and are aligned with the ends of corresponding grooves in another plate to form a solid line of electrically conductive material at the corners of the passage.
Inventors
- 👤 Corrado Dragone
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 15:05
CPC Classifications
H; H01; H01Q; H01Q13/00; H01Q13/02; H01Q13/0283; H01Q13/0291; H01P; H01P11/00; H01P11/001; H01P11/002; H01P3/00; H01P3/12; H01P3/123; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49002; Y10T29/49016
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
151 words
A method of fabricating a rectangular corrugated waveguide or feedhorn section, the method comprising the steps of: (a) forming a plurality of grooves of a predetermined depth and cross-section disposed in a line in a direction along a minor cross-sectional axis of the grooves in a major exposed surface of each of four separate plates comprising an electrically conductive material; and (b) disposing the four plates formed in step (a) relative to each other for forming a hollow corrugated rectangular guide section with a predetermined sized passage therethrough such that the ends of the grooves in each of the plates both substantially meet and are essentially aligned with ends of the grooves in a separate other plate of the four plates at each of the corners of the hollow guide section to provide a line of electrically conductive material at each of the corners of the passage through the guide section.
Claim 2
Independent Claim
151 words
A method of fabricating a rectangular corrugated waveguide or feedhorn section, the method comprising the steps of: (a) forming a plurality of grooves of a predetermined depth and cross-section disposed in a line in a direction along a minor cross-sectional axis of the grooves in a major exposed surface of each of four separate plates comprising an electrically conductive material; and (b) disposing the four plates formed in step (a) relative to each other for forming a hollow corrugated rectangular guide section with a predetermined sized passage therethrough such that the ends of the grooves in each of the plates both substantially meet and are essentially aligned with ends of the grooves in a separate other plate of the four plates at each of the corners of the hollow guide section to provide a line of electrically conductive material at each of the corners of the passage through the guide section.
Claim 3
Dependent Claim
89 words
The method according to claim 1 wherein in performing step (a), performing the step of: (c) forming the plurality of grooves such that a first end of each of the grooves is disposed adjacent a first edge of the major exposed surface of each plate parallel to a longitudinal axis of a plate, the grooves extending across the major exposed surface such that a second end of the grooves is within the thickness of a plate from a second edge of the major exposed surface opposite the first edge.
Claim 4
Dependent Claim
79 words
The method according to claim 2 wherein in performing step (b), performing the steps of: (d) engaging a side surface bordering on the first edge of the major exposed surface of each plate with the major exposed surface of a separate one of the four plates in the area between the second edge of the major exposed surface and the second end of the grooves in said major exposed surface; and (e) securing the four plates to each other.
Claim 5
Dependent Claim
31 words
The method according to claim 1, 2 or 3 wherein in performing step (a) using plates including a major exposed surface which is rectangular in shape for forming a waveguide section.
Claim 6
Dependent Claim
29 words
The method according to claim 1, 2 or 3 wherein in performing step (a) using plates including a flat frustum shaped major exposed surface for forming a feedhorn section.
Claim 7
Dependent Claim
67 words
The method according to claim 5 wherein the method comprises the further step of: (f) in performing step (a), forming the grooves across the major exposed surface of each plate at a predetermined angle to said major exposed surface such that the grooves will be disposed normal to a longitudinal axis of the feedhorn section when the four plates are disposed together in accordance with step (b).
Claim 8
Dependent Claim
141 words
A rectangular corrugated waveguide or feedhorn section comprising: four plates comprising an electrically conductive material, each plate including a plurality of grooves of a predetermined depth and cross-section disposed in a line in a direction along a minor cross-sectional axis of the grooves in a major exposed surface of each of the four plates, the four plates being disposed relative to each other to form a hollow corrugated rectangular guie section with a predetermined sized passage therethrough such that the ends of the grooves in each of the plates both substantially meet and are essentially aligned with the ends of the grooves in a separate other plate of the four plates at each of the corners of the hollow guide section to provide a line of electrically conductive material at each of the corners of the passage through the guide section.
Claim 9
Dependent Claim
141 words
A rectangular corrugated waveguide or feedhorn section comprising: four plates comprising an electrically conductive material, each plate including a plurality of grooves of a predetermined depth and cross-section disposed in a line in a direction along a minor cross-sectional axis of the grooves in a major exposed surface of each of the four plates, the four plates being disposed relative to each other to form a hollow corrugated rectangular guie section with a predetermined sized passage therethrough such that the ends of the grooves in each of the plates both substantially meet and are essentially aligned with the ends of the grooves in a separate other plate of the four plates at each of the corners of the hollow guide section to provide a line of electrically conductive material at each of the corners of the passage through the guide section.
Claim 10
Dependent Claim
81 words
A rectangular corrugated waveguide or feedhorn section according to claim 7 wherein in each of the four plates, a first end of each of the grooves is disposed adjacent a first edge of the major exposed surface parallel to a longitudinal axis of a plate, the grooves extending across the major exposed surface such that a second end of the grooves is within the thickness of a plate from a second edge of the major exposed surface opposite the first edge.
Claim 11
Dependent Claim
67 words
A rectangular corrugated waveguide or feedhorn section according to claim 8 wherein the side surface bordering on the first edge of the major exposed surface of each plate is engaged with the major exposed surface of a separate one of the four plates in the area between the second edge of the major exposed surface and the second end of the grooves in said major exposed surface.
Claim 12
Dependent Claim
27 words
A rectangular corrugated waveguide section according to claim 7, 8 or 9 wherein the major exposed surface of each of the four plates includes a rectangular shape.
Claim 13
Dependent Claim
28 words
A rectangular corrugated feedhorn section according to claim 7, 8 or 9 wherein the major exposed surface of each of the four plates comprises a flat frustum shape.
References Cited (Backward Citations)
US3046507A
Cited
US2943280A
Cited
US3274603A
Cited
US3618106A
Cited
US4047133A
Cited
US3949406A
Cited
US3974467A
Cited
US4255753A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1987-03-27 | 1987-09-26 | 1988-03-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-03-27 | 1991-09-26 | 1992-03-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-03-27 | 1995-09-26 | 1996-03-27 | $7700.00 | Window Closed / Lapsed |