US3787871A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Terminator for spiral antenna
Assignee: United States Department of the Navy
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Filing: 1971-03-03
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Granted: 1974-01-22
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Expires: 1991-03-03
Abstract
Abstract A spiral antenna wherein its radiating elements terminate in Archimedean spirals.
Inventors
- 👤 J Reese
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 20:47
CPC Classifications
H; H01; H01Q; H01Q9/00; H01Q9/04; H01Q9/16; H01Q9/26; H01Q9/27
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
38 words
An antenna array comprising; a plurality of interwound spiral radiators, and radiator termination means having at least a separate spiral member coupled to each said radiator and encircling said plurality of radiators for simulating an infinite radiating plane.
Claim 2
Dependent Claim
38 words
An antenna array comprising; a plurality of interwound spiral radiators, and radiator termination means having at least a separate spiral member coupled to each said radiator and encircling said plurality of radiators for simulating an infinite radiating plane.
Claim 3
Dependent Claim
41 words
The antenna of claim 1 wherein each said member is an electrically conductive material in the shape of an Archimedean spiral fixedly attached to each said radiator, such that each said radiator has one electrically conductive Archimedean spiral arm attached thereto.
Claim 4
Dependent Claim
22 words
The antenna of claim 2 wherein the Archimedean spiral arms interlock such that the spiral arms attached to adjacent radiators are adjacent.
Claim 5
Dependent Claim
25 words
The antenna of claim 3 wherein the width of each said spiral arm is equal to the width of the separation between adjacent spiral arms.
Claim 6
Dependent Claim
24 words
The antenna of claim 4 wherein said antenna comprises a copper clad epoxy glass board wherein said radiators and said spiral arms are etched.
Claim 7
Dependent Claim
35 words
The antenna of claim 4 wherein said antenna comprises a copper clad epoxy glass board wherein said radiators are etched, and electrically conductive wire in the shape of an Archimedean spiral attached to each radiator.
Claim 8
Dependent Claim
22 words
The antenna of claim 4 wherein the length of said arms is such that each said arm encircles said radiators four times.
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) | 1977-01-21 | 1977-07-23 | 1978-01-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-01-21 | 1981-07-23 | 1982-01-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-01-21 | 1985-07-23 | 1986-01-22 | $7700.00 | Window Closed / Lapsed |