US4752781A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Side-locking airborne radar (SLAR) antenna
Assignee: EMS Technologies Canada Ltd
•
Filing: 1986-01-15
•
Granted: 1988-06-21
•
Expires: 2006-01-15
Abstract
Abstract A planar slotted waveguide antenna array having a front, radiating surface and a back-plane, a length dimension L and a width dimension W, comprising a plurality of radiating waveguides parallel to the width dimension; a plurality of co-planar radiating apertures in each of said plurality of radiating waveguides constituting said radiating surface; a feeder waveguide along at least part of the length dimension contiguous a predetermined edge of the array; and a plurality of coupling apertures for coupling microwave energy between said feeder waveguide and each of said plurality of radiating waveguides.
Inventors
- 👤 Peter J. Wood
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 02:22
CPC Classifications
H; H01; H01Q; H01Q21/00; H01Q21/0006; H01Q21/0037; H01Q21/0043; H01Q21/005
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
118 words
A planar slotted waveguide antenna array having a front, radiating, surface and a back-plane, a length dimension L and a width dimension W, comprising: (a) a plurality of radiating waveguides parallel to the width dimension; (b) a plurality of co-planar radiating apertures in each of said plurality of radiating waveguides constituting said radiating surface; (c) a feeder waveguide along at least part of the length dimension contiguous a predetermined edge of the array; (d) a plurality of coupling apertures for coupling microwave energy between said feeder waveguide and each of said plurality of radiating waveguides; and (e) wherein the plurality of radiating waveguides and the plurality of coupling apertures are machined in a single piece of suitable metal.
Claim 2
Dependent Claim
118 words
A planar slotted waveguide antenna array having a front, radiating, surface and a back-plane, a length dimension L and a width dimension W, comprising: (a) a plurality of radiating waveguides parallel to the width dimension; (b) a plurality of co-planar radiating apertures in each of said plurality of radiating waveguides constituting said radiating surface; (c) a feeder waveguide along at least part of the length dimension contiguous a predetermined edge of the array; (d) a plurality of coupling apertures for coupling microwave energy between said feeder waveguide and each of said plurality of radiating waveguides; and (e) wherein the plurality of radiating waveguides and the plurality of coupling apertures are machined in a single piece of suitable metal.
Claim 3
Dependent Claim
34 words
The planar slotted waveguide antenna array as defined in claim 1, having machined in said single piece of metal along a predetermined side of the length dimension a coupling wall of said feeder waveguide.
Claim 4
Dependent Claim
32 words
The planar slotted waveguide antenna array as defined in claim 2, said plurality of coupling apertures alternating in a predetermined manner on either side of the longitudinal axis of said feeder waveguide.
Claim 5
Dependent Claim
54 words
The planar slotted waveguide antenna array as defined in claim 2, wherein a slab of aluminum is machined to provide three walls of each one of said plurality of radiating waveguides, and wherein each of said plurality of coupling apertures is machined into the edge of said slab of aluminum along said length dimension.
Claim 6
Dependent Claim
32 words
The planar slotted waveguide antenna array as defined in claim 1, said plurality of coupling apertures alternating in a predetermined manner on either side of the longitudinal axis of said feeder waveguide.
Claim 7
Dependent Claim
32 words
The planar slotted waveguide antenna array as defined in claim 1, said plurality of coupling apertures alternating in a predetermined manner on either side of the longitudinal axis of said feeder waveguide.
Claim 8
Dependent Claim
54 words
The planar slotted waveguide antenna array as defined in claim 1, wherein a slab of aluminum is machined to provide three walls of each one of said plurality of radiating waveguides, and wherein each of said plurality of coupling apertures is machined into the edge of said slab of aluminum along said length dimension.
Claim 9
Dependent Claim
54 words
The planar slotted waveguide antenna array as defined in claim 1, wherein a slab of aluminum is machined to provide three walls of each one of said plurality of radiating waveguides, and wherein each of said plurality of coupling apertures is machined into the edge of said slab of aluminum along said length dimension.
References Cited (Backward Citations)
US4517571A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1991-06-21 | 1991-12-21 | 1992-06-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-06-21 | 1995-12-21 | 1996-06-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-06-21 | 1999-12-21 | 2000-06-21 | $7700.00 | Window Closed / Lapsed |