Patent US4207554A successfully refreshed from Google Patents.
US4212012A
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Continuous wave radar
Assignee: Raytheon Co
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Filing: 1978-12-18
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Granted: 1980-07-08
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Expires: 1998-12-18
Abstract
Abstract A technique is described whereby a continuous wave radar transmitting a carrier with wide band modulation may be arranged adaptively to null large clutter returns from clutter at any range or azimuth.
Inventors
- 👤 David V. Manoogian
- 👤 Roderic J. Procaccino
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 14:33
CPC Classifications
G; G01; G01S; G01S7/00; G01S7/02; G01S7/03; G01S7/038; G01S13/00; G01S13/02; G01S13/06; G01S13/08; G01S13/32; G01S13/325
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
121 words
The method of operating a continuous wave radar which transmits a modulated continuous wave signal in a directional beam from a transmitting antenna trainable in azimuth and receives clutter signals from clutter at different ranges as the azimuth is changed, such method comprising the steps of: (a) determining, at each position in azimuth of the transmitting antenna, the range of any clutter in the far-field and storing a timing signal representative of the propagation delay of the clutter causing the greatest far field signal; (b) storing a reference signal representative of the modulation of the transmitted signal; and (c) reproducing, in response to the timing signal for each position in azimuth, the reference signal and nulling the then received clutter signals.
Claim 2
Independent Claim
121 words
The method of operating a continuous wave radar which transmits a modulated continuous wave signal in a directional beam from a transmitting antenna trainable in azimuth and receives clutter signals from clutter at different ranges as the azimuth is changed, such method comprising the steps of: (a) determining, at each position in azimuth of the transmitting antenna, the range of any clutter in the far-field and storing a timing signal representative of the propagation delay of the clutter causing the greatest far field signal; (b) storing a reference signal representative of the modulation of the transmitted signal; and (c) reproducing, in response to the timing signal for each position in azimuth, the reference signal and nulling the then received clutter signals.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1983-07-08 | 1984-01-07 | 1984-07-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-07-08 | 1988-01-07 | 1988-07-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-07-08 | 1992-01-07 | 1992-07-08 | $7700.00 | Window Closed / Lapsed |