Patent US3938151A successfully refreshed from Google Patents.
US3938151A
Expired / Lapsed
US
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Passive radar decoy having a large cross section
Assignee: United States Department of the Navy
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Filing: 1970-08-14
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Granted: 1976-02-10
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Expires: 1990-08-14
Abstract
Abstract A passive EW radar decoy capable of simulating relatively large targets s as naval ships. The decoy comprises a cylindrical, dimensionally stable plastic balloon having uniformly distributed on the surface thereof a Van Atta array of printed circuit radiators. The radiators in the array are disposed in a selectively predetermined geometric configuration such that incident energy from a remote source is reradiated by the array in the direction of the remote source. The decoy comprises a low-cost, light-weight, relatively simple structure that can be easily stored and rapidly deployed and released.
Inventors
- 👤 Richard S. Trenam
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 10:20
CPC Classifications
H; H01; H01Q; H01Q15/00; H01Q15/14; H01Q3/00; H01Q3/26; H01Q3/2605; H01Q3/2647
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
61 words
A passive, high-cross section radar decoy comprising: a plastic balloon having a selectively predetermined volume, said balloon having uniformly distributed on the surface thereof a plurality of printed circuit radiators, said radiators being disposed and arranged in a Van Atta array configuration whereby radiant energy from a distant source received by said radiators is reradiated in the direction of the source.
Claim 2
Dependent Claim
61 words
A passive, high-cross section radar decoy comprising: a plastic balloon having a selectively predetermined volume, said balloon having uniformly distributed on the surface thereof a plurality of printed circuit radiators, said radiators being disposed and arranged in a Van Atta array configuration whereby radiant energy from a distant source received by said radiators is reradiated in the direction of the source.
Claim 3
Dependent Claim
21 words
The radar decoy of claim 1 wherein said plastic balloon comprises a cylindrical balloon made from a dimensionally stable plastic material.
Claim 4
Dependent Claim
15 words
The radar decoy of claim 2 wherein said printed circuit radiators comprise printed circuit dipoles.
Claim 5
Dependent Claim
78 words
A passive, low-cost, light-weight radar decoy comprising: a cylindrical, dimensionally stable, plastic balloon, said balloon having a selectively predetermined volume whereby the echoing area of said decoy substantially simulates a given radar target, a plurality of printed circuit dipoles, said dipoles being uniformly distributed on the surface of said cylindrical balloon, said dispoles being disposed and arranged in a Van Atta array configuration whereby incident radiation from a distant source is reradiated in the direction of the source.
Claim 6
Dependent Claim
78 words
A passive, low-cost, light-weight radar decoy comprising: a cylindrical, dimensionally stable, plastic balloon, said balloon having a selectively predetermined volume whereby the echoing area of said decoy substantially simulates a given radar target, a plurality of printed circuit dipoles, said dipoles being uniformly distributed on the surface of said cylindrical balloon, said dispoles being disposed and arranged in a Van Atta array configuration whereby incident radiation from a distant source is reradiated in the direction of the source.
References Cited (Backward Citations)
US3789404A
Cited
US3860927A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-02-09 | 1979-08-11 | 1980-02-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-02-09 | 1983-08-11 | 1984-02-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-02-09 | 1987-08-11 | 1988-02-10 | $7700.00 | Window Closed / Lapsed |