US3877014A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Wide scan angle antenna utilizing surface wave and multiple element array modes of operation
Assignee: United States Department of the Air Force
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Filing: 1973-11-14
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Granted: 1975-04-08
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Expires: 1993-11-14
Abstract
Abstract An antenna capable of 180.degree. scan with improved gain characteristics at end-fire is realized by combining multiple element array and surface wave antenna structures. An end-fire feed element is positioned to radiate along a column array of antenna elements. A transmitter is switched to feed either the end-fire feed elements or the column array of antenna elements and the column array antenna elements are short circuited during end-fire operation.
Inventors
- 👤 Robert J Mailloux
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 22:17
CPC Classifications
H; H01; H01Q; H01Q13/00; H01Q13/20; H01Q13/28; H01Q3/00; H01Q3/24
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
112 words
A wide scan angle antenna comprising a multiplicity of antenna radiating elements arranged in a column array, an end-fire antenna feed element positioned adjacent to one end of said column array and directed to transmit electromagnetic wave energy therealong, a source of electromagnetic wave energy, short circuit means for short circuiting each antenna radiating element of said column array, and a switching circuit for engaging said source of electromagnetic wave energy either to said column array radiating elements or to said end-fire antenna feed element, said switching circuit being adapted to actuate said short circuit means only when said source of electromagnetic wave energy is engaged to said end-fire antenna feed element.
Claim 2
Dependent Claim
112 words
A wide scan angle antenna comprising a multiplicity of antenna radiating elements arranged in a column array, an end-fire antenna feed element positioned adjacent to one end of said column array and directed to transmit electromagnetic wave energy therealong, a source of electromagnetic wave energy, short circuit means for short circuiting each antenna radiating element of said column array, and a switching circuit for engaging said source of electromagnetic wave energy either to said column array radiating elements or to said end-fire antenna feed element, said switching circuit being adapted to actuate said short circuit means only when said source of electromagnetic wave energy is engaged to said end-fire antenna feed element.
References Cited (Backward Citations)
US3096520A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-04-07 | 1978-10-07 | 1979-04-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-04-07 | 1982-10-07 | 1983-04-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-04-07 | 1986-10-07 | 1987-04-08 | $7700.00 | Window Closed / Lapsed |