Patent US3656166A successfully refreshed from Google Patents.
US3656166A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Broadband circularly polarized omnidirectional antenna
Assignee: American Electronic Laboratories Inc
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Filing: 1970-06-05
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Granted: 1972-04-11
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Expires: 1990-06-05
Abstract
Abstract An omnidirectional, circular polarized antenna which includes a biconical dipole and a plurality of passive numbers mounted around the axis of the dipole within a boundary formed by a cylinder enclosing the biconical dipole. Each of the passive members includes three diamond shaped metal elements in side-byside relation and laying in the same plane. The plane of each of the passive members is at an angle with respect to the axis of the biconical dipole.
Inventors
- 👤 Robert T Klopach
- 👤 Joseph Bohar
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 12:37
CPC Classifications
H; H01; H01Q; H01Q9/00; H01Q9/04; H01Q9/16; H01Q9/28; H01Q15/00; H01Q15/24; H01Q15/242; H01Q15/244
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
92 words
An antenna comprising a biconical dipole, and means within the near field of the antenna to couple a portion of the energy of the biconical dipole into the means and re-radiate the energy at a retarded phase with respect to the energy radiated or received by the biconical dipole to achieve circular polarization, said means comprising a plurality of passive members each including at least three substantially diamond shaped elements lying in the same plane, said members being at least partially within the boundary formed by a cylinder enclosing the biconical dipole.
Claim 2
Dependent Claim
92 words
An antenna comprising a biconical dipole, and means within the near field of the antenna to couple a portion of the energy of the biconical dipole into the means and re-radiate the energy at a retarded phase with respect to the energy radiated or received by the biconical dipole to achieve circular polarization, said means comprising a plurality of passive members each including at least three substantially diamond shaped elements lying in the same plane, said members being at least partially within the boundary formed by a cylinder enclosing the biconical dipole.
Claim 3
Dependent Claim
24 words
An antenna in accordance with claim 1 in which the passive members are within the boundary formed by a cylinder enclosing the biconical dipole.
Claim 4
Dependent Claim
22 words
An antenna in accordance with claim 2 in which each of the passive members includes a thin flat diamond shaped metal element.
Claim 5
Dependent Claim
28 words
An antenna in accordance with claim 3 in which each of the passive members includes three diamond shaped metal elements with the elements lying in the same plane.
Claim 6
Dependent Claim
29 words
An antenna in accordance with claim 4 in which the plane of each passive member is at an angle with respect to the longitudinal axis of the biconical dipole.
Claim 7
Dependent Claim
35 words
An antenna in accordance with claim 5 in which the diamond shaped elements of each passive member are positioned in side-by-side relation with their minor diagonals being in alignment and their major diagonals being parallel.
Claim 8
Dependent Claim
46 words
An antenna in accordance with claim 6 in which the passive elements are arranged with the minor diagonals of the diamond shaped elements being perpendicular to and the major diagonals of the diamond shaped elements being at an angle to the axis of the biconical dipole.
Claim 9
Dependent Claim
35 words
An antenna in accordance with claim 7 in which the enD diamond shaped elements of each passive member are of the same size, and the center diamond shaped element is larger than the end elements.
Claim 10
Dependent Claim
45 words
An antenna in accordance with claim 8 in which the passive members are arranged around the axis of the biconical dipole in pairs with the spacing between the passive members of each pair being less than the spacing between the pairs of the passive members.
Claim 11
Dependent Claim
52 words
An antenna in accordance with claim 9 in which the height of the biconical dipole is equal to lambda m and the diameter of the base of each conical member of the biconical dipole is equal to 2 lambda m, where lambda m is the geometric wavelength of the desired frequency band.
Claim 12
Dependent Claim
64 words
An antenna in accordance with claim 10 in which each of the end diamond shaped elements of each of the passive members has its minor diagonal equal to 0.11 lambda m and its major diagonal equal to 0.34 lambda m, and the center diamond shaped element has its minor diagonal equal to 0.14 lambda m and its major diagonal equal to 0.43 lambda m.
Claim 13
Dependent Claim
32 words
An antenna in accordance with claim 11 in which the spacing between the apices of the adjacent diamond shaped elements of each of the passive members is less than 0.05 lambda m.
Claim 14
Dependent Claim
34 words
An antenna in accordance with claim 12 in which the spacing between the passive members of each pair is equal to 0.28 lambda m, and the spacing between the pairs is 0.5 lambda m.
Claim 15
Dependent Claim
18 words
An antenna in accordance with claim 13 in which there are sixteen passive members around the biconical dipole.
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) | 1975-04-11 | 1975-10-11 | 1976-04-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-04-11 | 1979-10-11 | 1980-04-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-04-11 | 1983-10-11 | 1984-04-11 | $7700.00 | Window Closed / Lapsed |