US4853704A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Notch antenna with microstrip feed
Assignee: BAE Systems Space & Mission Systems Inc
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Filing: 1988-05-23
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Granted: 1989-08-01
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Expires: 2008-05-23
Abstract
Abstract The subject invention provides an improved conformal antenna array assembly having a strip conductor, a ground plane separated from and lying parallel to said strip conductor, said ground plane having a slot therein, said slot extending transverse to said strip conductor, a conductive planar element positioned across said slot and orthogonal to said ground plane, said conductive planar element having curved surfaces extending upwardly and outwardly from said slot. The strip conductor or microstrip and the slot-containing ground plane are separated by a dielectric material.
Inventors
- 👤 Leopoldo J. Diaz
- 👤 Daniel B. McKenna
- 👤 Todd A. Pett
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 16:40
CPC Classifications
H; H01; H01Q; H01Q13/00; H01Q13/08; H01Q13/085
Claims Analysis
Total Claims: 28
Claim 1
Independent Claim
129 words
A broadband antenna comprising a strip conductor lying in a first plane, a ground plane separated from and lying parallel to said strip conductor, said ground plane having a slot therein, said slot extending transverse to said strip conductor, two substantially planar conductive elements positioned in a substantially common plane that transverses said slot and is substantially orthogonal to said first plane and said ground plane, each of said conductive elements having at least one curved surface extending upwardly and outwardly from said slot, one of said conductive elements contacting said ground plane on one side of said slot and the other of said conductive elements contacting said ground plane on the other side of said slot, wherein during use said strip conductor and said slot are capacitively coupled.
Claim 2
Dependent Claim
129 words
A broadband antenna comprising a strip conductor lying in a first plane, a ground plane separated from and lying parallel to said strip conductor, said ground plane having a slot therein, said slot extending transverse to said strip conductor, two substantially planar conductive elements positioned in a substantially common plane that transverses said slot and is substantially orthogonal to said first plane and said ground plane, each of said conductive elements having at least one curved surface extending upwardly and outwardly from said slot, one of said conductive elements contacting said ground plane on one side of said slot and the other of said conductive elements contacting said ground plane on the other side of said slot, wherein during use said strip conductor and said slot are capacitively coupled.
Claim 3
Dependent Claim
19 words
A broadband antenna as recited in claim 1 where said conductive elements are symmetrically mounted relative to said slot.
Claim 4
Dependent Claim
22 words
A broadband antenna as recited in claim 1 wherein each said conductive planar elements comprises a metallization disposed on a dielectric substrate.
Claim 5
Dependent Claim
19 words
A broadband antenna as recited in claim 1 wherein the slot is a parallelogram opening in the ground plane.
Claim 6
Dependent Claim
26 words
A broadband antenna as recited in claim 4 wherein the length of said parallelogram opening is one half of a wavelength at the highest operating frequency.
Claim 7
Dependent Claim
42 words
A broadband antenna as recited in claim 1 wherein the curved surfaces of said conductive planar elements each comprise a separate metallization bound by a radii and an included curved edge to define said curved surfaces for transmitting and receiving electromagnetic waves.
Claim 8
Dependent Claim
36 words
A broadband antenna as recited in claim 6 wherein the curved edges of the two separate metallizations are in close proximity and spaced apart from one another to define at the closest proximity a gap therebetween.
Claim 9
Dependent Claim
22 words
A broadband antenna as recited in claim 6 wherein the curved edge of each metallization flares outwardly according to a continuous function.
Claim 10
Dependent Claim
23 words
A broadband antenna as recited in claim 8 wherein said continuous function is selected from the group comprising parabolic, linear and exponential functions.
Claim 11
Dependent Claim
22 words
A broadband antenna as recited in claim 1, wherein said slot extends laterally away from said common plane of said conductive elements.
Claim 12
Dependent Claim
22 words
A broadband antenna as recited in claim 10, wherein said slot extends perpendicularly away from said common plane of said conductive elements.
Claim 13
Dependent Claim
33 words
A broadband antenna as recited in claim 1, wherein said slot extends laterally away from said strip conductor for a length substantially equal to one-quarter of a wavelength at the highest operating frequency.
Claim 14
Dependent Claim
23 words
A broadband antenna as recited in claim 1, wherein said strip conductor is substantially parallel to said common plane of said conductive elements.
Claim 15
Dependent Claim
26 words
A broadband antenna as recited in claim 1, wherein said strip conductor is substantially disposed on one side of said common plane of said conductive elements.
Claim 16
Dependent Claim
100 words
An antenna assembly comprising a dielectric material, a two-conductor transmission line, one line being a strip conductor formed on one side of said dielectric material and the other line formed as a ground plane on the other side of said dielectric material, said ground plane being provided with a slot therein, said slot extending transverse to said strip conductor, a notch antenna element positioned normal to said slot and orthogonal to said ground plane, said notch antenna element having at least two metallizations in electrical contact with said ground plane and extending from said slot according to a continuous function.
Claim 17
Dependent Claim
100 words
An antenna assembly comprising a dielectric material, a two-conductor transmission line, one line being a strip conductor formed on one side of said dielectric material and the other line formed as a ground plane on the other side of said dielectric material, said ground plane being provided with a slot therein, said slot extending transverse to said strip conductor, a notch antenna element positioned normal to said slot and orthogonal to said ground plane, said notch antenna element having at least two metallizations in electrical contact with said ground plane and extending from said slot according to a continuous function.
Claim 18
Dependent Claim
13 words
An antenna assembly as recited in claim 15 wherein said slot is rectangular.
Claim 19
Dependent Claim
26 words
An antenna assembly as recited in claim 16 wherein said rectangular slot has a length of one half of a wavelength at the highest operating frequency.
Claim 20
Dependent Claim
19 words
An antenna assembly as recited in claim 15 wherein the metallizations have curved edges separated by a predetermined gap.
Claim 21
Dependent Claim
16 words
An antenna assembly as recited in claim 18 wherein the curved edges follow a continuous function.
Claim 22
Dependent Claim
23 words
An antenna assembly as recited in claim 19 wherein said continuous function is selected from the group comprising parabolic, linear and exponential functions.
Claim 23
Dependent Claim
30 words
An antenna assembly as recited in claim 15 wherein the metallizations of said notch antenna element, the strip conductor and ground plane are formed on said dielectric material by electrodeposition.
Claim 24
Dependent Claim
21 words
An antenna assembly as recited in claim 15 wherein the assembly further includes a phase shifter connected to said strip conductor.
Claim 25
Dependent Claim
137 words
An antenna assembly comprising a dielectric material, a two-conductor transmission line, one line being a strip conductor formed on one side of said dielectric material and the other line formed as a ground plane on the other side of said dielectric material for propagation of a signal within a predetermined frequency range in a quasi-TEM mode via said strip conductor, said ground plane being provided with a slot therein, said slot extending transverse to said strip conductor and terminating approximately one-quarter wavelength beyond one side of said strip conductor, a dual ridge antenna device positioned normal to said slot and orthogonal to said ground plane, said dual ridge antenna device having metallizations in electrical contact with said ground plane, each ridge of said dual ridge antenna device extending outwardly from said slot according to a continuous function.
Claim 26
Dependent Claim
137 words
An antenna assembly comprising a dielectric material, a two-conductor transmission line, one line being a strip conductor formed on one side of said dielectric material and the other line formed as a ground plane on the other side of said dielectric material for propagation of a signal within a predetermined frequency range in a quasi-TEM mode via said strip conductor, said ground plane being provided with a slot therein, said slot extending transverse to said strip conductor and terminating approximately one-quarter wavelength beyond one side of said strip conductor, a dual ridge antenna device positioned normal to said slot and orthogonal to said ground plane, said dual ridge antenna device having metallizations in electrical contact with said ground plane, each ridge of said dual ridge antenna device extending outwardly from said slot according to a continuous function.
Claim 27
Dependent Claim
13 words
An antenna assembly as recited in claim 23 wherein said slot is rectangular.
Claim 28
Dependent Claim
29 words
An antenna assembly as recited in claim 23 wherein the metallizations define side ridges and are separated from one another to form at the closest proximity a gap therebetween.
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) | 1992-07-31 | 1993-01-30 | 1993-08-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-07-31 | 1997-01-30 | 1997-08-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-07-31 | 2001-01-30 | 2001-08-01 | $7700.00 | Window Closed / Lapsed |