US4516131A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Variable slot conductance dielectric antenna and method
Assignee: United States Department of the Army
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Filing: 1983-02-04
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Granted: 1985-05-07
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Expires: 2003-02-04
Abstract
Abstract A variable slot conductance dielectric wavequide antenna in which the transmission line and radiating aperture is formed in one continuous, integrated and homogeneous material. The radiated antenna beam pattern is controlled by varying the conductance of radiating slots using varied geometries for each of the slots.
Inventors
- 👤 William T. Bayha
- 👤 John Borowick
- 👤 Richard A. Stern
- 👤 Richard W. Babbitt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 18:41
CPC Classifications
H; H01; H01Q; H01Q13/00; H01Q13/20; H01Q13/28
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
87 words
A variable slot conductance dielectric antenna comprising: a section of dielectric waveguide having input and output ends; and a plurality of periodic radiating slots formed in the surface of said waveguide as an array along the length of said waveguide, said slots having a predetermined uniform periodic spacing along said length, each slot having a predetermined width and depth dimension, said width and depth dimensions being selectively non-uniform to control the conductance of each of said slots and the radiation pattern along the length of said waveguide.
Claim 2
Dependent Claim
87 words
A variable slot conductance dielectric antenna comprising: a section of dielectric waveguide having input and output ends; and a plurality of periodic radiating slots formed in the surface of said waveguide as an array along the length of said waveguide, said slots having a predetermined uniform periodic spacing along said length, each slot having a predetermined width and depth dimension, said width and depth dimensions being selectively non-uniform to control the conductance of each of said slots and the radiation pattern along the length of said waveguide.
Claim 3
Dependent Claim
14 words
An antenna according to claim 1 wherein said radiating slots are of uniform depth.
Claim 4
Dependent Claim
14 words
An antenna according to claim 1 wherein said radiating slots are of uniform width.
Claim 5
Dependent Claim
104 words
A frequency scanned dielectric antenna comprising: a section of dielectric waveguide having a rectangular cross-section; a plurality of uniformly spaced periodic radiating slots formed in the upper surface of said waveguide, each slot having predetermined width and length dimensions; said width and depth dimensions being selectively non-uniform to control the conductance of each of said slots and the radiation pattern along the length of said waveguide; a support means affixed to the lower surface of said waveguide; means for applying millimeter wavelength traveling waves of varying frequency to one end of said waveguide; and absorber means affixed to the other end of said waveguide.
Claim 6
Dependent Claim
104 words
A frequency scanned dielectric antenna comprising: a section of dielectric waveguide having a rectangular cross-section; a plurality of uniformly spaced periodic radiating slots formed in the upper surface of said waveguide, each slot having predetermined width and length dimensions; said width and depth dimensions being selectively non-uniform to control the conductance of each of said slots and the radiation pattern along the length of said waveguide; a support means affixed to the lower surface of said waveguide; means for applying millimeter wavelength traveling waves of varying frequency to one end of said waveguide; and absorber means affixed to the other end of said waveguide.
Claim 7
Dependent Claim
14 words
An antenna according to claim 4 wherein said radiating slots are of uniform depth.
Claim 8
Dependent Claim
14 words
An antenna according to claim 4 wherein said radiating slots are of uniform width.
Claim 9
Dependent Claim
15 words
An antenna according to claim 4 wherein said dielectric waveguide has a high dielectric constant.
Claim 10
Dependent Claim
19 words
An antenna according to claim 4 wherein said support means is a dielectric substrate having a low dielectric constant.
Claim 11
Dependent Claim
14 words
An antenna according to claim 4 wherein said support means is a metal substrate.
References Cited (Backward Citations)
GB1194342A
Cited
GB2097196A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1988-05-06 | 1988-11-05 | 1989-05-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-05-06 | 1992-11-05 | 1993-05-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-05-06 | 1996-11-05 | 1997-05-07 | $7700.00 | Window Closed / Lapsed |