US4010475A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Antenna array encased in dielectric to reduce size
Assignee: Plessey Handel und Investments AG
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Filing: 1975-08-07
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Granted: 1977-03-01
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Expires: 1995-08-07
Abstract
Abstract Constructions for radio antennae, whose size is made appreciably less than the size of conventional antennae by using the dielectric properties of a mixture of barium titanate and strontium titanate.
Inventors
- 👤 James Roderick James
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 11:15
CPC Classifications
H; H01; H01Q; H01Q19/00; H01Q19/06; H01Q19/09
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
47 words
A radio antenna comprising an active monopole a reflector monopole and at least one director monopole, and low-loss high-permittivity dielectric material surrounding the active monopole and the director monopole, the reflector monopole including a grid of conductive wires, and providing a closure wall for the dielectric material.
Claim 2
Dependent Claim
47 words
A radio antenna comprising an active monopole a reflector monopole and at least one director monopole, and low-loss high-permittivity dielectric material surrounding the active monopole and the director monopole, the reflector monopole including a grid of conductive wires, and providing a closure wall for the dielectric material.
Claim 3
Dependent Claim
93 words
A radio antenna comprising three monopoles, a central one of which is the projecting end of a core of a coaxial cable, and the other two of which are parallel to said central one and are spaced therefrom in opposite directions, one of the two being shorter and the other longer than the central monopole; the antenna also having a container containing dielectric material which surrounds each monopole, the dielectric material being a mixture of barium titanate and strontium titanate, the longest monopole being in the form of a grid of conductive material.
Claim 4
Dependent Claim
93 words
A radio antenna comprising three monopoles, a central one of which is the projecting end of a core of a coaxial cable, and the other two of which are parallel to said central one and are spaced therefrom in opposite directions, one of the two being shorter and the other longer than the central monopole; the antenna also having a container containing dielectric material which surrounds each monopole, the dielectric material being a mixture of barium titanate and strontium titanate, the longest monopole being in the form of a grid of conductive material.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-02-29 | 1980-08-30 | 1981-03-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-02-29 | 1984-08-30 | 1985-03-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-02-29 | 1988-08-30 | 1989-03-01 | $7700.00 | Window Closed / Lapsed |