US3975738A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Periodic antenna surface of tripole slot elements
Assignee: United States Department of the Air Force
•
Filing: 1975-05-12
•
Granted: 1976-08-17
•
Expires: 1995-05-12
Abstract
Abstract An antenna system in which a conical shaped metallic radome has a surface composed of a periodic array of radiating slot elements. Each slot element has three arms connected to each other and extending radially outward with the angular distance between adjacent arms equal to 120°. The slot elements are aligned in order to have each of the arms in an element parallel to an arm in an adjacent element forming a uniform periodic array.
Inventors
- 👤 Edward L. Pelton
- 👤 Benedikt A. Munk
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 20:41
CPC Classifications
H; H01; H01Q; H01Q15/00; H01Q15/0006; H01Q15/0013; H01Q1/00; H01Q1/42; H01Q1/425
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
67 words
An antenna system comprising: a. a metallic radome; and b. a periodic array of slot elements mounted equidistant from each other upon the radome with each of the slot elements having three arms joined at the center with an angular separation of 120° and with each of the arms of the slot elements being in parallel alignment with the one of the arms of the other slots.
Claim 2
Dependent Claim
67 words
An antenna system comprising: a. a metallic radome; and b. a periodic array of slot elements mounted equidistant from each other upon the radome with each of the slot elements having three arms joined at the center with an angular separation of 120° and with each of the arms of the slot elements being in parallel alignment with the one of the arms of the other slots.
Claim 3
Dependent Claim
16 words
An antenna system according to claim 1 wherein the shape of the metallic radome is conical.
Claim 4
Dependent Claim
62 words
A radiating surface comprising a multiplicity of radiating slot elements with each of the elements having three radial arms joined at the center and each of the arms having an angular distance of 120° from an adjacent arm and with the elements aligned to have one arm of each element parallel to one arm of an adjacent element forming a periodic array.
Claim 5
Dependent Claim
62 words
A radiating surface comprising a multiplicity of radiating slot elements with each of the elements having three radial arms joined at the center and each of the arms having an angular distance of 120° from an adjacent arm and with the elements aligned to have one arm of each element parallel to one arm of an adjacent element forming a periodic array.
References Cited (Backward Citations)
US3231892A
Cited
US3842421A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-08-17 | 1980-02-16 | 1980-08-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-08-17 | 1984-02-16 | 1984-08-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-08-17 | 1988-02-16 | 1988-08-17 | $7700.00 | Window Closed / Lapsed |