Patent US4668956A successfully refreshed from Google Patents.
US4668956A
Expired / Lapsed
US
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Broadband cup antennas
Assignee: CETEC ANTENNAS A CORP OF CA
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Filing: 1985-04-12
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Granted: 1987-05-26
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Expires: 2005-04-12
Abstract
Abstract A broadband cup antenna comprises dipole means having at least one pair of short spiral type monopoles diametrically disposed in a common plane in proximity to the open end of the cup. Parasitic elements are in juxtaposition with the monopoles and are electrically connected by a conductive ring mounted about coaxial lines. A circumferential slot formed in the outer conductor of the coaxial line adjacent to the monopoles serves for excitation of the monopole elements to effectuate signal transmission.
Inventors
- 👤 Ali R. Mahnad
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 19:46
CPC Classifications
H; H01; H01Q; H01Q21/00; H01Q21/24; H01Q21/26; H01Q13/00; H01Q13/10; H01Q13/18; H01Q9/00; H01Q9/04; H01Q9/16; H01Q9/28
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
78 words
A broadband cup-dipole antenna comprising: a conductive cylindrical cup having a bottom wall and an oppositng open end delineated by a cylindrical rim; dipole means comprising at least one pair of monopoles; parasitic elements for providing a reactance positioned within said cup and located between said pair of monopoles and said bottom wall; a coaxial line having inner and outer conductors; and a conductive ring positioned about said coaxial line, said rings being connected to said parasitic elements.
Claim 2
Dependent Claim
78 words
A broadband cup-dipole antenna comprising: a conductive cylindrical cup having a bottom wall and an oppositng open end delineated by a cylindrical rim; dipole means comprising at least one pair of monopoles; parasitic elements for providing a reactance positioned within said cup and located between said pair of monopoles and said bottom wall; a coaxial line having inner and outer conductors; and a conductive ring positioned about said coaxial line, said rings being connected to said parasitic elements.
Claim 3
Dependent Claim
18 words
A broadband antenna as in claim 1, wherein said monopoles are formed in a short spiral type configuration.
Claim 4
Dependent Claim
22 words
A broadband antenna as in claim 1, wherein said monopoles and parasitic elements are flat and are disposed in a common plane.
Claim 5
Dependent Claim
19 words
A broadband antenna as in claim 1, wherein said conductive cup is made of a mesh of conductive wires.
Claim 6
Dependent Claim
17 words
A broadband antenna as in claim 1, wherein said monopoles are electrically connected to said outer conductor.
Claim 7
Dependent Claim
20 words
A broadband antenna as in claim 1, including a circumferential gap formed in said outer conductor adjacent to said monopoles.
Claim 8
Dependent Claim
24 words
A broadband antenna as in claim 1, including an electrical shorting part for shorting said outer conductor at one point to said inner conductor.
Claim 9
Dependent Claim
96 words
A broadband cup-dipole antenna comprising: a conductive cylindrical cup having a bottom wall and an opposing open end delineated by a cylindrical rim; dipole means comprising at least one pair of monopoles; parasitic elements for providing a reactance positioned within said cup and located between said pair of monopoles and said bottom wall; said dipole means comprising four monopoles spaced at 90° intervals in a common plane, including four parasitic elements, and each of said parasitic elements being aligned respectively with each of said monopoles in a direction parallel to the cylindrical axis of said cup.
Claim 10
Dependent Claim
96 words
A broadband cup-dipole antenna comprising: a conductive cylindrical cup having a bottom wall and an opposing open end delineated by a cylindrical rim; dipole means comprising at least one pair of monopoles; parasitic elements for providing a reactance positioned within said cup and located between said pair of monopoles and said bottom wall; said dipole means comprising four monopoles spaced at 90° intervals in a common plane, including four parasitic elements, and each of said parasitic elements being aligned respectively with each of said monopoles in a direction parallel to the cylindrical axis of said cup.
Claim 11
Dependent Claim
54 words
A broadband antenna as in claim 8, including two coaxial lines associated with said four monopoles, said coaxial lines extending from said bottom wall and disposed orthogonally to each other, said coaxial lines including outer conductors and inner conductors, and two circumferential gaps formed in said outer conductors at right angles to each other.
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) | 1990-05-25 | 1990-11-24 | 1991-05-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-05-25 | 1994-11-24 | 1995-05-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-05-25 | 1998-11-24 | 1999-05-26 | $7700.00 | Window Closed / Lapsed |