US5227808A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Wide-band L-band corporate fed antenna for space based radars
Assignee: United States Department of the Air Force
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Filing: 1991-05-31
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Granted: 1993-07-13
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Expires: 2011-05-31
Abstract
Abstract A large antenna array is constructed in sub-arrays which are supported in a stacked and folded (stowed) condition, and then deployed by first unfolding and then expanding the stack. The sub-arrays are compressed together to yield a very compact stowed configuration, due to the absence of a continuous ground planes. The compressed sub-arrays are contained within a foldable cage like frame.
Inventors
- 👤 Mark B. Davis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 16:45
CPC Classifications
H; H01; H01Q; H01Q13/00; H01Q13/08; H01Q13/085; H01Q1/00; H01Q1/08
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
98 words
In a collapsible antenna array having no ground plane, the combination comprising: a plurality of planar sub-arrays, each of said sub-arrays comprising an elongated, thin, flexible substrate having a plurality of antenna elements printed thereon; a feed strip comprising a second flexible substrate having feedlines thereon for supplying R.F. energy to said antenna elements of said sub-arrays, said sub-arrays being mounted in spaced parallel relationship on said second substrate, said second substrate being foldable when said sub-arrays are compressed in a direction transverse to said parallel relationship, whereby said antenna array can be stored in a compressed state.
Claim 2
Dependent Claim
98 words
In a collapsible antenna array having no ground plane, the combination comprising: a plurality of planar sub-arrays, each of said sub-arrays comprising an elongated, thin, flexible substrate having a plurality of antenna elements printed thereon; a feed strip comprising a second flexible substrate having feedlines thereon for supplying R.F. energy to said antenna elements of said sub-arrays, said sub-arrays being mounted in spaced parallel relationship on said second substrate, said second substrate being foldable when said sub-arrays are compressed in a direction transverse to said parallel relationship, whereby said antenna array can be stored in a compressed state.
Claim 3
Dependent Claim
36 words
The antenna array of claim 1 in which said feedlines for supplying said R.F. energy to said antenna elements are printed on said second flexible substrate, and said second substrate is comprised of a dielectric material.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1996-07-12 | 1997-01-11 | 1997-07-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2000-07-12 | 2001-01-11 | 2001-07-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2004-07-12 | 2005-01-11 | 2005-07-13 | $7700.00 | Window Closed / Lapsed |