US4990919A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Missile decoy system
Assignee: Raytheon Co
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Filing: 1989-10-23
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Granted: 1991-02-05
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Expires: 2009-10-23
Abstract
Abstract A radar system, including a pulse radar capable of emitting interrogating pulses and high rate antiradition missile decoys, is shown to comprise a plurality of decoys adapted to emit pulses having duty factors less than the duty factor of the interrogating pulses, but when activated successively form a changing composite covering pulse for overlapping an emitted interrogating pulse, thereby preventing an anti-radiation missile from destroying the radar system.
Inventors
- 👤 David V. Manoogian
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 23:20
CPC Classifications
G; G01; G01S; G01S7/00; G01S7/02; G01S7/38
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
173 words
A method of protecting a pulse radar from an ARM missile attempting to home on interrogating pulses emitted by such radar, the duty factor and amplitudes of the interrogating pulses being known, such method comprising the steps of: (a) siting a plurality of decoys at different locations in the vicinity of the pulse radar, each one of the decoys being adapted, when actuated, to emit pulses having duty factors less than the duty factor of the interrogating pulses and amplitudes normally greater than the amplitudes of the interrogating pulses; (b) sequentially actuating, when each one of the interrogating pulses is generated in the pulse radar, a selected set of decoys in the plurality of decoys to form a composite covering pulse overlapping the then emitted one of the interrogating pulses; and (c) changing, at the time each successive one of the interrogating pulses is generated, the sequence in which the decoys in each selected set are actuated, thereby to change the composite covering pulse overlapping each one of the successively emitted interrogating pulses.
Claim 2
Independent Claim
173 words
A method of protecting a pulse radar from an ARM missile attempting to home on interrogating pulses emitted by such radar, the duty factor and amplitudes of the interrogating pulses being known, such method comprising the steps of: (a) siting a plurality of decoys at different locations in the vicinity of the pulse radar, each one of the decoys being adapted, when actuated, to emit pulses having duty factors less than the duty factor of the interrogating pulses and amplitudes normally greater than the amplitudes of the interrogating pulses; (b) sequentially actuating, when each one of the interrogating pulses is generated in the pulse radar, a selected set of decoys in the plurality of decoys to form a composite covering pulse overlapping the then emitted one of the interrogating pulses; and (c) changing, at the time each successive one of the interrogating pulses is generated, the sequence in which the decoys in each selected set are actuated, thereby to change the composite covering pulse overlapping each one of the successively emitted interrogating pulses.
Claim 3
Dependent Claim
25 words
The method as in claim 1 wherein the number of decoys in the selected set equals the number of decoys in the plurality of decoys.
References Cited (Backward Citations)
US2931031A
Cited
US3624652A
Cited
US4149167A
Cited
US3879732A
Cited
US3670333A
Cited
US4173760A
Cited
US3905035A
Cited
US3600685A
Cited
US4097865A
Cited
US4456912A
Cited
US4347513A
Cited
US4433333A
Cited
US4546356A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1994-02-04 | 1994-08-06 | 1995-02-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-02-04 | 1998-08-06 | 1999-02-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-02-04 | 2002-08-06 | 2003-02-05 | $7700.00 | Window Closed / Lapsed |