US3717878A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Spiral antenna
Assignee: United States Department of the Navy
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Filing: 1968-01-31
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Granted: 1973-02-20
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Expires: 1988-01-31
Abstract
Abstract Spiral antenna in which adjacent conductors are three dimensional and composed of spaced segments of a spiral disposed in one plane, the ends of which are joined by conductors disposed in another plane which have lengths greater than the spacing between the ends of the segments, thereby increasing the wire length of the convolutions over that of conductors having convolutions which lie only in one plane.
Inventors
- 👤 J Mosko
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 07:17
CPC Classifications
H; H01; H01Q; H01Q9/00; H01Q9/04; H01Q9/16; H01Q9/26; H01Q9/27
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
94 words
A reduced size antenna comprising: a dielectric planar mounting surface; at least two substantially identical equiangularly spaced conductors; each conductor having segmental portions lying adjacent said surface, the segmental portions forming a spiral; said segmental portions being series connected by other portions of the conductor; each of said other portions having a length in excess of the distance between ends of adjacent segments; said other portions being disposed away from the plane of said mounting surface; whereby the conductor length of a convolution of the spiral is greater than the length around the convolution.
Claim 2
Dependent Claim
94 words
A reduced size antenna comprising: a dielectric planar mounting surface; at least two substantially identical equiangularly spaced conductors; each conductor having segmental portions lying adjacent said surface, the segmental portions forming a spiral; said segmental portions being series connected by other portions of the conductor; each of said other portions having a length in excess of the distance between ends of adjacent segments; said other portions being disposed away from the plane of said mounting surface; whereby the conductor length of a convolution of the spiral is greater than the length around the convolution.
Claim 3
Dependent Claim
94 words
A reduced size antenna comprising: a dielectric planar mounting surface; at least two substantially identical equiangularly spaced conductors; each conductor having segmental portions lying adjacent said surface, the segmental portions forming a spiral; said segmental portions being series connected by other portions of the conductor; each of said other portions having a length in excess of the distance between ends of adjacent segments; said other portions being disposed away from the plane of said mounting surface; whereby the conductor length of a convolution of the spiral is greater than the length around the convolution.
Claim 4
Dependent Claim
94 words
A reduced size antenna comprising: a dielectric planar mounting surface; at least two substantially identical equiangularly spaced conductors; each conductor having segmental portions lying adjacent said surface, the segmental portions forming a spiral; said segmental portions being series connected by other portions of the conductor; each of said other portions having a length in excess of the distance between ends of adjacent segments; said other portions being disposed away from the plane of said mounting surface; whereby the conductor length of a convolution of the spiral is greater than the length around the convolution.
Claim 5
Dependent Claim
49 words
An antenna in accordance with claim 1 including a second dielectric surface disposed in spaced relation to said mounting surface, each of said other portions extending between said mounting surface and the second dielectric surface and each having a portion disposed adjacent and supported by the second dielectric surface.
Claim 6
Dependent Claim
30 words
An antenna in accordance with claim 2 wherein the second dielectric surface is conical and the distance between it and the mounting surface constantly increases in a radially outward direction.
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) | 1976-02-20 | 1976-08-21 | 1977-02-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-02-20 | 1980-08-21 | 1981-02-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-02-20 | 1984-08-21 | 1985-02-20 | $7700.00 | Window Closed / Lapsed |