US4851847A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for eliminating self-screening noise jamming in radar systems
Assignee: United States Department of the Air Force
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Filing: 1970-01-22
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Granted: 1989-07-25
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Expires: 1990-01-22
Abstract
Abstract A method for eliminating self-screening noise jamming from the main beam of a radar in order to reveal the skin echoes of aircraft at the same angle, including the aircraft carrying the jammer by using a main antenna and an auxiliary antenna located a short distance apart, delaying the signal from the auxiliary antenna, decorrelating the signals and cancelling the jamming signals.
Inventors
- 👤 Charles B. Clarkson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 05:00
CPC Classifications
G; G01; G01S; G01S7/00; G01S7/02; G01S7/36; G01S7/28; G01S7/2813
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
105 words
A method for eliminating self-screening noise from main beam radar echo returns in a radar system comprising the steps of deploying a first main radar antenna; deploying a second and third auxiliary radar antenna a known distance from the first antenna; delaying the signals which are received respectively by said second and third antennas until it is identical to noise signals received by the first antenna; mixing and filtering said delayed signals; combining the signals from the first antenna with the altered signals from said second and third antennas, thereby cancelling the noise signals and providing an output means for the refined main antenna signal.
Claim 2
Independent Claim
105 words
A method for eliminating self-screening noise from main beam radar echo returns in a radar system comprising the steps of deploying a first main radar antenna; deploying a second and third auxiliary radar antenna a known distance from the first antenna; delaying the signals which are received respectively by said second and third antennas until it is identical to noise signals received by the first antenna; mixing and filtering said delayed signals; combining the signals from the first antenna with the altered signals from said second and third antennas, thereby cancelling the noise signals and providing an output means for the refined main antenna signal.
References Cited (Backward Citations)
US4628320A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-07-24 | 1993-01-23 | 1993-07-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-07-24 | 1997-01-23 | 1997-07-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-07-24 | 2001-01-23 | 2001-07-25 | $7700.00 | Window Closed / Lapsed |