Patent US3569977A successfully refreshed from Google Patents.
US3569977A
Expired / Lapsed
US
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Hexagram antenna
Assignee: Goodyear Aerospace Corp
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Filing: 1968-12-26
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Granted: 1971-03-09
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Expires: 1988-12-26
Abstract
Abstract Two triangular radiating elements are interlaced in a helical winding about a common axis to form a single antenna structure. The elements are wound in opposite directions and are laterally separated, thus reducing the RF coupling between them and improving the circularity of each radiating pattern with one radiating element wound in one direction and the other in the opposite direction, a dual circularity is achieved from the same physical volume.
Inventors
- 👤 William B Koller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 13:39
CPC Classifications
H; H01; H01Q; H01Q11/00; H01Q11/02; H01Q11/08
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
67 words
An antenna which comprises: at least two radiating elements wound in a geometric pattern of not more than four sides in opposed helixes along a common axis with a uniform longitudinal spacing between elements and alternate positioning of angular changes in the elements whereby maximum spacing between elements is achieved to reduce mutual coupling; and means to form a ground plane on one end of the elements.
Claim 2
Dependent Claim
67 words
An antenna which comprises: at least two radiating elements wound in a geometric pattern of not more than four sides in opposed helixes along a common axis with a uniform longitudinal spacing between elements and alternate positioning of angular changes in the elements whereby maximum spacing between elements is achieved to reduce mutual coupling; and means to form a ground plane on one end of the elements.
Claim 3
Dependent Claim
45 words
An antenna according to claim 1 which includes a connector for feeding the elements, where said means to form a ground plane is a base and where the connector is electrically connected to the base whereby the base provides a ground plane for the antenna.
Claim 4
Dependent Claim
47 words
An antenna according to claim 2 which includes a post to support the radiating elements, which post in cross section has the shape of a hexagon, and the shape of the elements in plan is an equilateral triangle closely fitting around the longitudinal axis of the post.
Claim 5
Dependent Claim
42 words
An antenna according to claim 3 where the longitudinal displacement between elements is predetermined as a portion of the pitch distance for one convolution of the helical wrap of each element to achieve minimum VSWR between the connector and the radiating elements.
Claim 6
Dependent Claim
28 words
An antenna according to claim 4 where the pitch angle of the elements is 19.5* and where each element has a designed bandwidth between 1.00 to 2.00 GHz.
Claim 7
Dependent Claim
90 words
An antenna which comprises: a base to provide a ground plane; and a pair of elements capable of transmitting and receiving electromagnetic radiation mounted to the base and extending substantially normal thereto in concentric relation to an axis substantially perpendicular to the surface of the base which is characterized by the elements being wound in opposed triangularly shaped helical convolutions about the axis with a uniform longitudinal spacing between elements whereby each apex is associated with a corresponding base of the adjacent element to reduce mutual coupling therebetween upon energization.
Claim 8
Dependent Claim
90 words
An antenna which comprises: a base to provide a ground plane; and a pair of elements capable of transmitting and receiving electromagnetic radiation mounted to the base and extending substantially normal thereto in concentric relation to an axis substantially perpendicular to the surface of the base which is characterized by the elements being wound in opposed triangularly shaped helical convolutions about the axis with a uniform longitudinal spacing between elements whereby each apex is associated with a corresponding base of the adjacent element to reduce mutual coupling therebetween upon energization.
Claim 9
Dependent Claim
83 words
An antenna which comprises: at least two radiating elements wound in a geometric pattern of not more than four sides in opposed helixes along a common axis with uniformly decreasing longitudinal spacing between elements, with a similar uniform decrease in the size of the convolutions of each helical wrap, and with alternate positioning of angular changes in the elements whereby maximum spacing between elements is achieved to reduce material coupling; and means to form a ground plane on one end of the elements.
Claim 10
Dependent Claim
83 words
An antenna which comprises: at least two radiating elements wound in a geometric pattern of not more than four sides in opposed helixes along a common axis with uniformly decreasing longitudinal spacing between elements, with a similar uniform decrease in the size of the convolutions of each helical wrap, and with alternate positioning of angular changes in the elements whereby maximum spacing between elements is achieved to reduce material coupling; and means to form a ground plane on one end of the elements.
References Cited (Backward Citations)
US2616046A
Cited
US3083364A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-03-08 | 1974-09-07 | 1975-03-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-03-08 | 1978-09-07 | 1979-03-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-03-08 | 1982-09-07 | 1983-03-09 | $7700.00 | Window Closed / Lapsed |