US3761943A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dual-band array antenna
Assignee: United States Department of the Navy
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Filing: 1972-07-21
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Granted: 1973-09-25
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Expires: 1992-07-21
Abstract
Abstract A unitary antenna comprising two different arrays. The first is a group of waveguide antenna elements in alternately displaced rows forming a triangular grid structure and the second is another group of waveguide antenna elements forming a triangular grid structure within the first grid structure. The two groups of elements are dielectrically loaded, are polarized to radiate orthogonally to each other, and are designed to radiate at different frquency bands.
Inventors
- 👤 W Harper
- 👤 W Thrift
- 👤 R Hailey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 12:39
CPC Classifications
H; H01; H01Q; H01Q5/00; H01Q5/40; H01Q5/42
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
155 words
An array antenna comprising, in combination: a plurality of first rectangular antenna elements designed to radiate efficiently at a first predetermined frequency band, said elements being arranged in rows wherein alternate rows are displaced laterally from each other so that a triangular grid structure is formed; and a plurality of second antenna elements designed to radiate efficiently at a second predetermined frequency band which is different from the first, said elements being arranged in rows and alternate rows being displaced from each other so that a triangular grid structure is formed, wherein each second element extends between a first element in one row and a first element in a row twice removed from said one row, said group of second antenna elements being interleaved among said elements of the first group, the radiation from said first group of antenna elements being polarized orthogonally with respect to the radiation from said second group of antenna elements.
Claim 2
Dependent Claim
155 words
An array antenna comprising, in combination: a plurality of first rectangular antenna elements designed to radiate efficiently at a first predetermined frequency band, said elements being arranged in rows wherein alternate rows are displaced laterally from each other so that a triangular grid structure is formed; and a plurality of second antenna elements designed to radiate efficiently at a second predetermined frequency band which is different from the first, said elements being arranged in rows and alternate rows being displaced from each other so that a triangular grid structure is formed, wherein each second element extends between a first element in one row and a first element in a row twice removed from said one row, said group of second antenna elements being interleaved among said elements of the first group, the radiation from said first group of antenna elements being polarized orthogonally with respect to the radiation from said second group of antenna elements.
Claim 3
Dependent Claim
34 words
An array antenna as in claim 1, wherein said antenna elements are formed from waveguide sections, all said antenna waveguide elements being dielectrically loaded by dielectric material which is placed within each waveguide element.
Claim 4
Dependent Claim
24 words
An array antenna as in claim 1, wherein both groups of antenna elements are symmetrical with respect to the center of said array antenna.
Claim 5
Dependent Claim
25 words
An array antenna as in claim 1, wherein the spacing of the antenna elements is such that no grating lobes are formed in visible space.
Claim 6
Dependent Claim
14 words
An array antenna as in claim 1, wherein each second antenna element is I-shaped.
References Cited (Backward Citations)
US3623111A
Cited
US3706998A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-09-24 | 1977-03-26 | 1977-09-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-09-24 | 1981-03-26 | 1981-09-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-09-24 | 1985-03-26 | 1985-09-25 | $7700.00 | Window Closed / Lapsed |