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US5166697A
Expired / Lapsed
US
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Complementary bowtie dipole-slot antenna
Assignee: Lockheed Martin Corp
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Filing: 1991-01-28
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Granted: 1992-11-24
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Expires: 2011-01-28
Abstract
Abstract The antenna system includes a complementary "bowtie" dipole-slot antenna, the antenna having symmetrical halves about a plane of symmetry. The two halves of the antenna are slanted at the plane of symmetry such that the total included angle between the halves is between 70 degrees and 120 degrees. A ground plane is positioned between the halves of the antenna extending through the plane of symmetry. A circuit is included for independently exciting the halves of the antenna. In a second embodiment the ground plane incorporates a pair of notch antennas. Thus, both vertical and horizontal polarization can be achieved independent of each other.
Inventors
- 👤 Eduardo E. Viladevall
- 👤 William N. Moule
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 16:16
CPC Classifications
H; H01; H01Q; H01Q1/00; H01Q1/27; H01Q1/28; H01Q1/286; H01Q1/287; H01Q17/00; H01Q9/00; H01Q9/04; H01Q9/0407; H01Q9/0471; H01Q9/16; H01Q9/28
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
97 words
An antenna system comprising: a complementary bowtie dipole-slot antenna having dipole portions, peripheral edge portions, and slot portions defined by said dipole portions and said peripheral edge portions, said antenna having symmetrical halves about a plane of symmetry with each half including a said dipole portion, said halves slanted at said plane of symmetry such that the total included angle between said halves is between 70 degree and 120 degrees; a ground plane positioned between said halves of said antenna coincident through said plane of symmetry; and circuit means for independently exciting said halves of said antenna.
Claim 2
Dependent Claim
97 words
An antenna system comprising: a complementary bowtie dipole-slot antenna having dipole portions, peripheral edge portions, and slot portions defined by said dipole portions and said peripheral edge portions, said antenna having symmetrical halves about a plane of symmetry with each half including a said dipole portion, said halves slanted at said plane of symmetry such that the total included angle between said halves is between 70 degree and 120 degrees; a ground plane positioned between said halves of said antenna coincident through said plane of symmetry; and circuit means for independently exciting said halves of said antenna.
Claim 3
Dependent Claim
20 words
The antenna system as set forth in claim 1 wherein said included angle is between 70 degrees and 90 degrees.
Claim 4
Dependent Claim
50 words
The antenna system as set forth in claim 2 including: the dipole portion of each of said antenna halves are generally triangular shaped with the apexes thereof contingent to each other; and said means to excite said antenna halves is coupled to said apexes of said triangular shaped dipole portions.
Claim 5
Dependent Claim
20 words
The antenna system as set forth in claim 3 wherein said included angle at said apexes is generally 90 degrees.
Claim 6
Dependent Claim
29 words
The antenna as set forth in claim 4 wherein the peripheral edge portion of each half of said complementary bowtie dipole-slot antenna are electrically coupled to said ground plane.
Claim 7
Dependent Claim
126 words
An antenna system comprising: a complementary bowtie dipole-slot antenna having dipole portions, peripheral edge portions, and slot portions defined by said dipole portions and said peripheral edge portions, said antenna having symmetrical halves about a plane of symmetry with each half including a said dipole portion, said halves slanted at said plane of symmetry such that the total included angle between said halves is between 70 degrees and 120 degrees; a ground plane positioned between said halves of said antenna coincident through said plane of symmetry; circuit means for independently exciting said halves of said antenna; a pair of notch antennas, said pair of notch antennas having the notch portions thereof mounted in said ground plane; and second circuit means for individually feeding said notch antennas.
Claim 8
Dependent Claim
126 words
An antenna system comprising: a complementary bowtie dipole-slot antenna having dipole portions, peripheral edge portions, and slot portions defined by said dipole portions and said peripheral edge portions, said antenna having symmetrical halves about a plane of symmetry with each half including a said dipole portion, said halves slanted at said plane of symmetry such that the total included angle between said halves is between 70 degrees and 120 degrees; a ground plane positioned between said halves of said antenna coincident through said plane of symmetry; circuit means for independently exciting said halves of said antenna; a pair of notch antennas, said pair of notch antennas having the notch portions thereof mounted in said ground plane; and second circuit means for individually feeding said notch antennas.
Claim 9
Dependent Claim
20 words
The antenna system as set forth in claim 6 wherein said included angle is between 70 degrees and 90 degrees.
Claim 10
Dependent Claim
50 words
The antenna system as set forth in claim 7 including: the dipole portion of each of said antenna halves are generally triangular shaped with the apexes thereof contingent to each other; and said means to excite said antenna halves is coupled to the apexes of said triangular shaped dipole portions.
Claim 11
Dependent Claim
20 words
The antenna system as set forth in claim 8 wherein said included angle at said apexes is generally 90 degrees.
Claim 12
Dependent Claim
29 words
The antenna system as set forth in claim 9 wherein the peripheral edge portions of said complementary bowtie dipole-slot antenna pass through said notch portions of said notch antennas.
Claim 13
Dependent Claim
32 words
The antenna system as set forth in claim 3 or 5 or 9 or 10 including said ground plane extending at least 1.5 inches in front of said complementary bowtie dipole-slot antenna.
References Cited (Backward Citations)
US3193831A
Cited
US3266044A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1995-11-24 | 1996-05-25 | 1996-11-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-11-24 | 2000-05-25 | 2000-11-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-11-24 | 2004-05-25 | 2004-11-24 | $7700.00 | Window Closed / Lapsed |