US3922684A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Radio antennae encased in dielectric to reduce size
Assignee: Plessey Handel und Investments AG
•
Filing: 1974-06-12
•
Granted: 1975-11-25
•
Expires: 1994-06-12
Abstract
Abstract A radio antenna in which the length of conductor needed is appreciably reduced by the use of a compacted dielectric material as part of the antenna. Various constructions and various dielectric materials are considered.
Inventors
- 👤 Hubert Charles Wright
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 08:50
CPC Classifications
H; H01; H01Q; H01Q1/00; H01Q1/40; H01Q19/00; H01Q19/06; H01Q19/09
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
55 words
A radio antenna comprising an electrical conductor in combination with low-loss high permittivity dielectric material formed of a mixture of titanates compacted under pressure to form a rigid structure, said dielectric material being a single cylindrical body of uniform diameter with a central hold bored therein to receive the electrical conductor along the length thereof.
Claim 2
Dependent Claim
55 words
A radio antenna comprising an electrical conductor in combination with low-loss high permittivity dielectric material formed of a mixture of titanates compacted under pressure to form a rigid structure, said dielectric material being a single cylindrical body of uniform diameter with a central hold bored therein to receive the electrical conductor along the length thereof.
Claim 3
Dependent Claim
17 words
An antenna as claimed in claim 1 in which the constituents are barium titanate and strontium titanate.
Claim 4
Dependent Claim
17 words
An antenna as claimed in claim 1 in which the constituents are lanthanum titanate and magnesium titanate.
Claim 5
Dependent Claim
17 words
An antenna as claimed in claim 1 in which the constituents are calcium titanate and bismuth titanate.
Claim 6
Dependent Claim
26 words
An antenna as claimed in claim 1 which includes a conductive ground plate extending at right angles to the cylinder at one end of the cylinder.
Claim 7
Dependent Claim
18 words
An antenna as claimed in claim 1 which includes a conductive annulus at one end of the cylinder.
Claim 8
Dependent Claim
21 words
An antenna as claimed in claim 1 which includes a conductive band encircling the cylinder about the mid-point of the cylinder.
References Cited (Backward Citations)
US2611869A
Cited
US2567260A
Cited
US2748386A
Cited
US2769170A
Cited
US3518683A
Cited
US3771157A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-11-24 | 1979-05-26 | 1979-11-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-11-24 | 1983-05-26 | 1983-11-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-11-24 | 1987-05-26 | 1987-11-25 | $7700.00 | Window Closed / Lapsed |