US4429313A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Waveguide slot antenna
Assignee: Individual
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Filing: 1981-11-24
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Granted: 1984-01-31
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Expires: 2001-11-24
Abstract
Abstract This invention relates to an arrangement of waveguide coupling mechanisms in a two-layer structure that will produce accurate excitation of the array radiating slot elements over a wide bandwidth, handle high input power and be useful either as a very small array or sub-array of a larger array.
Inventors
- 👤 Harvey P. Muhs, Jr.
- 👤 Charles K. Watson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 23:11
CPC Classifications
H; H01; H01Q; H01Q21/00; H01Q21/0006; H01Q21/0037; H01Q21/0043; H01Q21/005
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
83 words
A two layer waveguide coupling mechanism having a common wall between the layers and a radiating aperture, the first layer comprising an input waveguide, a feed waveguide whose structure does not extend past the boundary of the radiating aperture, a short circuit at either end of the feed waveguide, coupling slots in the common wall between the layers, the second layer comprising two adjacent radiating waveguide cavities, a short circuit at either end of each cavity, and radiating slots in the radiating aperture.
Claim 2
Dependent Claim
83 words
A two layer waveguide coupling mechanism having a common wall between the layers and a radiating aperture, the first layer comprising an input waveguide, a feed waveguide whose structure does not extend past the boundary of the radiating aperture, a short circuit at either end of the feed waveguide, coupling slots in the common wall between the layers, the second layer comprising two adjacent radiating waveguide cavities, a short circuit at either end of each cavity, and radiating slots in the radiating aperture.
Claim 3
Dependent Claim
26 words
The device of claim 1 comprising an inductive septum in the first layer adapted to provide impedance match of the input waveguide to the feed waveguide.
Claim 4
Dependent Claim
17 words
The device of claim 2 comprising inductive irises in the input waveguide to provide additional impedance matching.
Claim 5
Dependent Claim
31 words
The device of claim 1 comprising an input waveguide that is offset from the centerline of the radiating aperture to provide the desired distribution of power to the individual radiating waveguides.
Claim 6
Dependent Claim
12 words
The device of claim 1 wherein the input is a coaxial input.
Claim 7
Dependent Claim
19 words
The device of claim 1 wherein a plurality of waveguide coupling mechanisms are combined to form a larger antenna.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1987-01-30 | 1987-08-01 | 1988-01-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-01-30 | 1991-08-01 | 1992-01-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-01-30 | 1995-08-01 | 1996-01-31 | $7700.00 | Window Closed / Lapsed |