US3594806A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dipole augmented slot radiating elements
Assignee: Raytheon Co
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Filing: 1969-04-02
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Granted: 1971-07-20
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Expires: 1989-04-02
Abstract
Abstract The apparatus of the present invention enhances the performance of slot radiating elements or arrays, increasing the overall antenna gain, increasing the front to back signal ratio, suppressing undesirable side lobes and reducing the mutual coupling between array elements. This enhanced performance is generally achieved by augmenting the respective individual slots with exterior feed lines which form a transmission line transition to either free space or one or more dipole auxiliary radiating elements. The exterior elements can assume a number of configurations.
Inventors
- 👤 Woodrow W Black
- 👤 Alvin Clavin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 21:19
CPC Classifications
H; H01; H01Q; H01Q21/00; H01Q21/29
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
66 words
A radiating element comprising a segment of rectangular waveguide of indeterminate length having a slot capable of radiating microwave energy having an E-plane normal to said slot and said waveguide and first and second conductive posts disposed in said E-plane midway along and on opposite sides of said slot attached to the exterior side of said waveguide thereby to increase the gain of said radiating element.
Claim 2
Dependent Claim
66 words
A radiating element comprising a segment of rectangular waveguide of indeterminate length having a slot capable of radiating microwave energy having an E-plane normal to said slot and said waveguide and first and second conductive posts disposed in said E-plane midway along and on opposite sides of said slot attached to the exterior side of said waveguide thereby to increase the gain of said radiating element.
Claim 3
Dependent Claim
75 words
A radiating element comprising a segment of rectangular waveguide of indeterminate length having a longitudinal slot in a broad wall thereof capable of radiating microwave energy having an E-plane normal to said slot and said broad wall and first and second conductive posts disposed in said E-plane midway along and on opposite sides of said longitudinal slot attached to the exterior side of said broad wall thereby to increase the gain of said radiating element.
Claim 4
Dependent Claim
75 words
A radiating element comprising a segment of rectangular waveguide of indeterminate length having a longitudinal slot in a broad wall thereof capable of radiating microwave energy having an E-plane normal to said slot and said broad wall and first and second conductive posts disposed in said E-plane midway along and on opposite sides of said longitudinal slot attached to the exterior side of said broad wall thereby to increase the gain of said radiating element.
Claim 5
Dependent Claim
17 words
The radiating element as defined in claim 2 wherein said first and second conductive posts slant outwards.
Claim 6
Dependent Claim
17 words
The radiating element as defined in claim 2 wherein said first and seCond conductive posts curve outwards.
Claim 7
Dependent Claim
37 words
The radiating element as defined in claim 2 wherein said first and second conductive posts are vertical cylinders relative to said broad wall with a height substantially equal to one-quarter free space wavelength of said microwave energy.
Claim 8
Dependent Claim
107 words
A radiating element comprising a segment of rectangular waveguide having a slot capable of radiating microwave energy having an E-plane normal to said slot and said waveguide, first and second cylindrical conductive posts disposed in said E-plane midway along and on opposite sides of said slot and attached vertically to the exterior side of said waveguide, said first and second posts having a height substantially equal to one-quarter free space wavelength of said microwave frequency, and first and second one-quarter wavelength conductive elements disposed in said E-plane with adjacent extremities thereof on said first and second posts, respectively, thereby to increase the gain of said radiating element.
Claim 9
Dependent Claim
107 words
A radiating element comprising a segment of rectangular waveguide having a slot capable of radiating microwave energy having an E-plane normal to said slot and said waveguide, first and second cylindrical conductive posts disposed in said E-plane midway along and on opposite sides of said slot and attached vertically to the exterior side of said waveguide, said first and second posts having a height substantially equal to one-quarter free space wavelength of said microwave frequency, and first and second one-quarter wavelength conductive elements disposed in said E-plane with adjacent extremities thereof on said first and second posts, respectively, thereby to increase the gain of said radiating element.
Claim 10
Dependent Claim
116 words
A radiating element comprising a segment of rectangular waveguide having a longitudinal slot in a broad wall thereof capable of radiating microwave energy having an E-plane normal to said slot and said broad wall, first and second cylindrical conductive posts disposed in said E-plane midway along and on opposite sides of said longitudinal slot and attached vertically to the exterior side of said broad wall, said first and second posts having a height substantially equal to one-quarter free space wavelength of said microwave frequency, and first and second one-quarter wavelength conductive elements disposed in said E-plane with adjacent extremities thereof on said first and second posts, respectively, thereby to increase the gain of said radiating element.
Claim 11
Dependent Claim
116 words
A radiating element comprising a segment of rectangular waveguide having a longitudinal slot in a broad wall thereof capable of radiating microwave energy having an E-plane normal to said slot and said broad wall, first and second cylindrical conductive posts disposed in said E-plane midway along and on opposite sides of said longitudinal slot and attached vertically to the exterior side of said broad wall, said first and second posts having a height substantially equal to one-quarter free space wavelength of said microwave frequency, and first and second one-quarter wavelength conductive elements disposed in said E-plane with adjacent extremities thereof on said first and second posts, respectively, thereby to increase the gain of said radiating element.
Claim 12
Dependent Claim
66 words
The radiating element as defined in claim 7 additionally including third and fourth conductive posts of a height substantially equal to one-quarter free space wavelength disposed over said first and second posts, in contact with said first and second one-quarter wavelength elements, respectively; and third and fourth one-quarter wavelength conductive elements disposed in said E-plane with adjacent extremities thereof on said third and fourth posts, respectively.
Claim 13
Dependent Claim
111 words
A linear array of radiating elements comprising a rectangular waveguide of indeterminate length having first and second narrow walls and first and second broad walls; a plurality of longitudinal slots disposed in said first broad wall on alternate sides of the centerline thereof at uniform intervals, said respective longitudinal slots being capable of radiating microwave energy having an E-plane normal thereto and normal to said first broad wall; and means coupled to said microwave energy and attached to the exterior side of said first broad wall in said E-plane midway along and on opposite sides of each of said plurality of longitudinal slots for increasing the gain of said linear array.
Claim 14
Dependent Claim
111 words
A linear array of radiating elements comprising a rectangular waveguide of indeterminate length having first and second narrow walls and first and second broad walls; a plurality of longitudinal slots disposed in said first broad wall on alternate sides of the centerline thereof at uniform intervals, said respective longitudinal slots being capable of radiating microwave energy having an E-plane normal thereto and normal to said first broad wall; and means coupled to said microwave energy and attached to the exterior side of said first broad wall in said E-plane midway along and on opposite sides of each of said plurality of longitudinal slots for increasing the gain of said linear array.
Claim 15
Dependent Claim
118 words
A linear array of radiating elements comprising a rectangular waveguide having first and second narrow walls and first and second broad walls; a plurality of longitudinal slots disposed in said first broad wall on alternate sides of the centerline thereof at uniform intervals, said respective longitudinal slots being capable of radiating microwave energy having an E-plane normal thereto and normal to said first broad wall; first and second conductive posts disposed on opposite sides of and midway along each of said plurality of longitudinal slots, and first and second one-quarter wavelength elements at the frequency of said microwave energy corresponding to each first and second conductive posts, respectively, disposed in said E-plane with adjacent extremities on top thereof.
Claim 16
Dependent Claim
118 words
A linear array of radiating elements comprising a rectangular waveguide having first and second narrow walls and first and second broad walls; a plurality of longitudinal slots disposed in said first broad wall on alternate sides of the centerline thereof at uniform intervals, said respective longitudinal slots being capable of radiating microwave energy having an E-plane normal thereto and normal to said first broad wall; first and second conductive posts disposed on opposite sides of and midway along each of said plurality of longitudinal slots, and first and second one-quarter wavelength elements at the frequency of said microwave energy corresponding to each first and second conductive posts, respectively, disposed in said E-plane with adjacent extremities on top thereof.
Claim 17
Dependent Claim
81 words
In a planar array of radiating elements, a plurality of segments of rectangular waveguide disposed in juxtaposition with adjacent segments having common narrow walls; a longitudinal slot in each respective broad wall of said plurality of segments of rectangulaR waveguide capable of radiating microwave energy having a common E-plane normal thereto and to said broad walls; and a conductive vertical cylinder attached to the exterior side of said broad walls midway along and intermediate each adjacent pair of said longitudinal slots.
Claim 18
Dependent Claim
81 words
In a planar array of radiating elements, a plurality of segments of rectangular waveguide disposed in juxtaposition with adjacent segments having common narrow walls; a longitudinal slot in each respective broad wall of said plurality of segments of rectangulaR waveguide capable of radiating microwave energy having a common E-plane normal thereto and to said broad walls; and a conductive vertical cylinder attached to the exterior side of said broad walls midway along and intermediate each adjacent pair of said longitudinal slots.
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) | 1974-07-19 | 1975-01-18 | 1975-07-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-07-19 | 1979-01-18 | 1979-07-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-07-19 | 1983-01-18 | 1983-07-20 | $7700.00 | Window Closed / Lapsed |