Patent US4062017A successfully refreshed from Google Patents.
US4062017A
Expired / Lapsed
US
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Multiple frequency band antenna
Assignee: Individual
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Filing: 1975-11-20
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Granted: 1977-12-06
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Expires: 1995-11-20
Abstract
Abstract An antenna configuration in which multiple frequency band coverage is obtained in simple structures. This invention is most useful in the high-frequency spectrum where other techniques of providing multiple frequency operation become physically difficult to implement. The antenna configuration includes a multiplicity of conductor elements, a coaxial cable network for interconnection of the elements and connection to a feedline, and a high permeability core to aid decoupling to the feedline exterior from the antenna proper.
Inventors
- 👤 Wallace T. Thompson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 09:15
CPC Classifications
H; H01; H01Q; H01Q1/00; H01Q1/12; H01Q1/14; H01Q5/00; H01Q5/10; H01Q5/15; H01Q5/30; H01Q5/307; H01Q5/314; H01Q5/321
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
242 words
A multiple frequency band antenna for coupling to a feedline comprising: a high permeability core; a coaxial network including first and second input terminals for connection to said feedline, and first and second coaxial cables each comprising an electrically conductive shield having first and second ends and a center conductor having first and second ends, said first coaxial cable being wrapped about said high permeability core and having the first end of its center conductor and its shield connected to said first and second input terminals, the second end of the center conductor of said first coaxial cable being connected to the first end of the center conductor of said second coaxial cable, the conductive shields of said first and second coaxial cables being connected together; and first, second and third conductive radiation elements, said first element being coupled to the junction between the first and second ends of the center conductors of said first and second coaxial cables respectively, said second element being coupled to the second end of the center conductor of said second coaxial cable and said third element being coupled to the junction between the shields of said first and second coaxial cables, said second coaxial cable having an electrical length equal approximately to an integral multiple of one-half wavelengths at the frequency at which said first and second elements are half-wave resonant, said high permeability core decoupling energy in said antenna from the exterior of said feedline.
Claim 2
Dependent Claim
242 words
A multiple frequency band antenna for coupling to a feedline comprising: a high permeability core; a coaxial network including first and second input terminals for connection to said feedline, and first and second coaxial cables each comprising an electrically conductive shield having first and second ends and a center conductor having first and second ends, said first coaxial cable being wrapped about said high permeability core and having the first end of its center conductor and its shield connected to said first and second input terminals, the second end of the center conductor of said first coaxial cable being connected to the first end of the center conductor of said second coaxial cable, the conductive shields of said first and second coaxial cables being connected together; and first, second and third conductive radiation elements, said first element being coupled to the junction between the first and second ends of the center conductors of said first and second coaxial cables respectively, said second element being coupled to the second end of the center conductor of said second coaxial cable and said third element being coupled to the junction between the shields of said first and second coaxial cables, said second coaxial cable having an electrical length equal approximately to an integral multiple of one-half wavelengths at the frequency at which said first and second elements are half-wave resonant, said high permeability core decoupling energy in said antenna from the exterior of said feedline.
Claim 3
Dependent Claim
41 words
A multiple frequency band antenna as defined by claim 1 which further comprises a support structure and wherein said second coaxial cable is coiled and suspended from said support structure, said high permeability core also being suspended from said support structure.
Claim 4
Dependent Claim
34 words
A multiple frequency band antenna as defined by claim 1 which further comprises a fourth conductive radiation element attached between the first and second ends of the center conductor of said second coaxial cable.
Claim 5
Dependent Claim
27 words
A multiple frequency band antenna as defined by claim 1 which further comprises reactance components connected in series with said first, second and third conductive radiation elements.
Claim 6
Dependent Claim
17 words
A multiple frequency band antenna as defined by claim 4 wherein said reactance components comprise resonant circuits.
Claim 7
Dependent Claim
38 words
A multiple frequency band antenna as defined by claim 1 wherein the second end of the conductive shield of said first coaxial cable is connected to the first end of the conductive shield of said second coaxial cable.
Claim 8
Dependent Claim
28 words
A multiple frequency band antenna as defined by claim 1 wherein the first and second ends of the conductive shield of said second coaxial cable are connected together.
References Cited (Backward Citations)
US3534371A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-12-05 | 1981-06-06 | 1981-12-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-12-05 | 1985-06-06 | 1985-12-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-12-05 | 1989-06-06 | 1989-12-06 | $7700.00 | Window Closed / Lapsed |