US3987456A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Wide relative frequency band and reduced size-to-wavelength ratio antenna
Assignee: Lignes Telegraphiques et Telephoniques LTT SA
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Filing: 1975-07-21
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Granted: 1976-10-19
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Expires: 1995-07-21
Abstract
Abstract A wide relative frequency band and reduced size-to-wavelength ratio antenna comprising essentially a first part in the form of a conductor ring and a second part in the form of a skirt respectively connected to the central and outer conductors of a coaxial feeder. The first part has a conductive path in the form of a circumference and one of its diameters; the central conductor of the feeder is connected to the mid-point of the said diameter. The second part is in the form of a skirt and has a conductive path formed by a circular ring connected to one of the ends of each one of a plurality of conducting strands having the form of broken lines inscribed in isosceles trapezoid forming an assembly defining the faces of a frusto-pyramid, while an annular and conical end member is connected to the feeder outer conductor and is in contact with the other ends of the strands.
Inventors
- 👤 Jean Gelin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 22:19
CPC Classifications
H; H01; H01Q; H01Q9/00; H01Q9/04; H01Q9/16; H01Q9/28; H01Q1/00; H01Q1/36; H01Q1/38; H01Q13/00; H01Q13/20; H01Q13/206
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
191 words
A wide relative frequency band and reduced size-to-wavelength ratio antenna comprising a coaxial feeder, a first conducting part in the form of a ring and a second conducting part in the form of a frusto-pyramidal skirt respectively connected to the central and outer conductors of said coaxial feeder, in which said first conducting part includes a conductive path in the form of a circumference and one of its diameters, said central conductor of said feeder to said conducting path being connected to said path at the center of the one of said diameters, in which said second conducting part includes a further conductive path including conducting strands, said further conducting path having the form of a circumference and connected to one of the ends of each one of said conducting strands, and the edges of said conducting strands being respectively inscribed in each one of a plurality of isosceles trapezoids constituting the side faces of said frusto-pyramid; and an annular and conical end member which is connected to said feeder outer conductor and to the other end of said each one of said strands, the assembly of which forms said skirt.
Claim 2
Dependent Claim
191 words
A wide relative frequency band and reduced size-to-wavelength ratio antenna comprising a coaxial feeder, a first conducting part in the form of a ring and a second conducting part in the form of a frusto-pyramidal skirt respectively connected to the central and outer conductors of said coaxial feeder, in which said first conducting part includes a conductive path in the form of a circumference and one of its diameters, said central conductor of said feeder to said conducting path being connected to said path at the center of the one of said diameters, in which said second conducting part includes a further conductive path including conducting strands, said further conducting path having the form of a circumference and connected to one of the ends of each one of said conducting strands, and the edges of said conducting strands being respectively inscribed in each one of a plurality of isosceles trapezoids constituting the side faces of said frusto-pyramid; and an annular and conical end member which is connected to said feeder outer conductor and to the other end of said each one of said strands, the assembly of which forms said skirt.
Claim 3
Dependent Claim
21 words
An antenna according to claim 1, in which said conductive paths are made of metal wires embedded in a dielectric material.
Claim 4
Dependent Claim
20 words
An antenna according to claim 1, in which at least part of said conductive paths are made of printed-circuit conductors.
Claim 5
Dependent Claim
15 words
An antenna according to claim 1, in which said frusto-pyramidal skirt has six side faces.
Claim 6
Dependent Claim
25 words
An antenna according to claim 1, the conical end member of which has an apex angle close to and greater than that of said frusto-pyramid.
Claim 7
Dependent Claim
31 words
An antenna according to claim 1, in which said further conductive path in the form of a circumference is circumscribed on the polygon formed by the base sides of said trapezoid.
Claim 8
Dependent Claim
31 words
An antenna according to claim 1, in which said further conductive path in the form of a circumference is inscribed in the polygon formed by the base sides of said trapezoid.
Claim 9
Dependent Claim
34 words
An antenna according to claim 1, in which said frusto-pyramid has an apex angle substantially equal to 60° and in which said annular conical end member has an apex angle substantially equal to 80°.
Claim 10
Dependent Claim
34 words
An antenna according to claim 1, in which said frusto-pyramid has an apex angle substantially equal to 60° and in which said annular conical end member has an apex angle substantially equal to 90°.
References Cited (Backward Citations)
US2368663A
Cited
DE821374C
Cited
US2802209A
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Cited
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US3618107A
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US3787865A
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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) | 1979-10-19 | 1980-04-19 | 1980-10-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-10-19 | 1984-04-19 | 1984-10-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-10-19 | 1988-04-19 | 1988-10-19 | $7700.00 | Window Closed / Lapsed |