US3969732A
Expired / Lapsed
US
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Spiral antenna circuit
Assignee: Individual
•
Filing: 1975-04-24
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Granted: 1976-07-13
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Expires: 1995-04-24
Abstract
Abstract A spiral antenna circuit having as a principal active element a continuously scaled logarithmic spiral circuit originating substantially from a center point to a point of coupling with a matching continuous inverse logarithmic spiral circuit terminating at a predetermined incremental radius from the center point.
Inventors
- 👤 Albert L. Holloway
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 08:28
CPC Classifications
H; H01; H01Q; H01Q9/00; H01Q9/04; H01Q9/16; H01Q9/26; H01Q9/27
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
87 words
A spiral antenna circuit comprising first and second antenna elements, each having at least one continuously scaled logarithmic spiral having a width continuously growing and at least one continuously scaled inverse logarithmic spiral having a termination with a termination point and having a width continuously diminishing to said termination point, wherein the inverse logarithmic spiral has an in continuum coupling to the logarithmic spiral; said continuously scaled logarithmic spiral being constructed from logarithmic equations and said continuously scaled inverse logarithmic spiral being constructed from inverse logarithmic equations.
Claim 2
Dependent Claim
87 words
A spiral antenna circuit comprising first and second antenna elements, each having at least one continuously scaled logarithmic spiral having a width continuously growing and at least one continuously scaled inverse logarithmic spiral having a termination with a termination point and having a width continuously diminishing to said termination point, wherein the inverse logarithmic spiral has an in continuum coupling to the logarithmic spiral; said continuously scaled logarithmic spiral being constructed from logarithmic equations and said continuously scaled inverse logarithmic spiral being constructed from inverse logarithmic equations.
Claim 3
Dependent Claim
45 words
In an antenna having continuously scaled spiral logarithmic antenna circuit elements constructed from logarithmic equations, a termination comprising continuously scaled spiral inverse logarithmic circuit elements constructed from inverse logarithmic equations, said inverse logarithmic circuit elements having an in continuum coupling to said logarithmic circuit elements.
Claim 4
Dependent Claim
45 words
In an antenna having continuously scaled spiral logarithmic antenna circuit elements constructed from logarithmic equations, a termination comprising continuously scaled spiral inverse logarithmic circuit elements constructed from inverse logarithmic equations, said inverse logarithmic circuit elements having an in continuum coupling to said logarithmic circuit elements.
Claim 5
Dependent Claim
86 words
A spiral antenna circuit comprising at least one continuously scaled logarithmic spiral element spiraling substantially from a center point to a predetermined first radius from the center point, said logarithmic spiral element being constructed from logarithmic equations and having a circuit termination comprising at least one continuously scaled inverse logarithmic spiral element coupled to said logarithmic spiral element at the first radius and terminating at a predetermined second radius incrementally distant from the first radius, said inverse logarithmic spiral element being constructed from inverse logarithmic equations.
Claim 6
Dependent Claim
86 words
A spiral antenna circuit comprising at least one continuously scaled logarithmic spiral element spiraling substantially from a center point to a predetermined first radius from the center point, said logarithmic spiral element being constructed from logarithmic equations and having a circuit termination comprising at least one continuously scaled inverse logarithmic spiral element coupled to said logarithmic spiral element at the first radius and terminating at a predetermined second radius incrementally distant from the first radius, said inverse logarithmic spiral element being constructed from inverse logarithmic equations.
Claim 7
Dependent Claim
27 words
The spiral antenna circuit of claim 3 wherein said continuously scaled logarithmic spiral element includes a plurality of continuously scaled, coupled, logarithmic spirals having different wrap angles.
Claim 8
Dependent Claim
29 words
The spiral antenna circuit of claim 3 wherein said continuously scaled inverse logarithmic spiral element includes a plurality of continuously scaled, coupled, inverse logarithmic spirals having different wrap angles.
Claim 9
Dependent Claim
43 words
The spiral antenna circuit of claim 3 wherein said circuit has two continuously scaled logarithmic spiral elements spiraling 180° out of phase substantially from said center point with each of said elements having a circuit termination comprising continuously scaled inverse logarithmic spiral element.
Claim 10
Dependent Claim
49 words
The spiral circuit of claim 3 wherein said circuit has a multiplicity of spiral elements spiraling 360/ ° out of phase, where n is the number of elements, from said center point with each of said elements having a circuit termination comprising a continuously scaled inverse logarithmic spiral element.
Claim 11
Dependent Claim
17 words
The spiral antenna circuit of claim 1 wherein said antenna elements are constructed on a common surface.
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) | 1979-07-13 | 1980-01-12 | 1980-07-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-07-13 | 1984-01-12 | 1984-07-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-07-13 | 1988-01-12 | 1988-07-13 | $7700.00 | Window Closed / Lapsed |