US3984840A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Bootlace lens having two plane surfaces
Assignee: Raytheon Co
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Filing: 1975-07-17
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Granted: 1976-10-05
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Expires: 1995-07-17
Abstract
Abstract A planar constrained lens (bootlace lens) antenna is disclosed capable of providing a large one or two dimensional field of view with either a scanning feed or with multiple feeds. This planar constrained lens antenna is of the type which can replace both narrow field of view and wide field of view lenses in multiple beam communications satellite and in limited scan radars using focal plane scanning or with a two element lens system and a scanning phased array feed.
Inventors
- 👤 Robert A. Dell-Imagine
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 16:49
CPC Classifications
H; H01; H01Q; H01Q25/00; H01Q25/007; H01Q19/00; H01Q19/06; H01Q19/062; H01Q3/00; H01Q3/26
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
131 words
A planar constrained lens antenna comprising a planar pickup array of receiving elements, said pickup array having an optical axis with a focal point disposed a distance f therealong from said planar array, the distance of any receiving element of said planar array from said optical axis being designated ρ; a planar array of radiating elements each corresponding to a discrete receiving element of said pickup array, the distance of a corresponding radiating element from the center of said radiating array is designated ρ' where ##EQU7## wherein k is a constant; means for connecting corresponding receiving and radiating elements with an electrical conductor of a length to equalize the distance from said focal point to any respective radiating element; and a feed disposed along said optical axis at said focal point.
Claim 2
Dependent Claim
131 words
A planar constrained lens antenna comprising a planar pickup array of receiving elements, said pickup array having an optical axis with a focal point disposed a distance f therealong from said planar array, the distance of any receiving element of said planar array from said optical axis being designated ρ; a planar array of radiating elements each corresponding to a discrete receiving element of said pickup array, the distance of a corresponding radiating element from the center of said radiating array is designated ρ' where ##EQU7## wherein k is a constant; means for connecting corresponding receiving and radiating elements with an electrical conductor of a length to equalize the distance from said focal point to any respective radiating element; and a feed disposed along said optical axis at said focal point.
Claim 3
Dependent Claim
44 words
The planar constrained lens antenna as defined in claim 1 wherein corresponding receiving and radiating elements located at the outer edge of said pickup array and said planar array of radiating elements, respectively, have the same distance, R from said optical axis whereby ##EQU8##
Claim 4
Dependent Claim
44 words
The planar constrained lens antenna as defined in claim 1 wherein corresponding receiving and radiating elements located at the outer edge of said pickup array and said planar array of radiating elements, respectively, have the same distance, R from said optical axis whereby ##EQU9##
References Cited (Backward Citations)
US2986734A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-10-05 | 1980-04-05 | 1980-10-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-10-05 | 1984-04-05 | 1984-10-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-10-05 | 1988-04-05 | 1988-10-05 | $7700.00 | Window Closed / Lapsed |