Patent US3624651A successfully refreshed from Google Patents.
US3624651A
Expired / Lapsed
US
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Radar receivers of the successive detections type
Assignee: SUD AVIAT SOC NATIONALE DE CON
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Filing: 1969-04-08
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Granted: 1971-11-30
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Expires: 1989-04-08
Abstract
Abstract The present invention relates to a method of shaping radar signals upon reception, characterized by the fact that it includes the step of subjecting each signal received to successive amplifications and to detections respectively associated thereto, the step of making a first summing of the signals detected up to the penultimate detection, the step of making a second summing of the signals resulting from the first summing and of the signals resulting from the ultimate detection, the step of subjecting the signals resulting from said second summing to a constant time delay, the step of effecting s subtraction operation between the time-delayed signals and the signals resulting from the first summing, and the step of subjecting the signals resulting from said subtraction to a baseclipping and peak-clipping operation whereby to generate usable signals the leading edges of which are produced at instants independent of the amplitude of the signals received and hence, most notably, of the range of the target.
Inventors
- 👤 Andre Charles Robert
- 👤 Maurice Pierre Rodolph Gerlach
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 16:48
CPC Classifications
G; G01; G01S; G01S7/00; G01S7/02; G01S7/28; G01S7/285; G01S7/32
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
104 words
A method of shaping radar signals upon reception, comprising the steps of successively amplifying and detecting each signal received, first summing the signals detected up through the penultimate detection, second summing of the signals resulting from the first summing and of the signals resulting from the ultimate detection, subjecting the signals resulting from said second summing to a constant time delay, subtracting the timedelayed signals from the signals resulting from the first summing, and base clipping and peak clipping the signals resulting from said subtraction to generate signals having leading edges which are produced at times independent of the amplitude of the signals received.
Claim 2
Independent Claim
104 words
A method of shaping radar signals upon reception, comprising the steps of successively amplifying and detecting each signal received, first summing the signals detected up through the penultimate detection, second summing of the signals resulting from the first summing and of the signals resulting from the ultimate detection, subjecting the signals resulting from said second summing to a constant time delay, subtracting the timedelayed signals from the signals resulting from the first summing, and base clipping and peak clipping the signals resulting from said subtraction to generate signals having leading edges which are produced at times independent of the amplitude of the signals received.
Claim 3
Dependent Claim
148 words
Apparatus for shaping radar signals upon reception comprising a chain of successive amplifiers and detectors, said amplifiers being connected in series, each of said detectors being connected to the output of a respective amplifier, the output of each of said detectors being electrically connected to the input of a first summing device, a second summing device, said chain having an output last amplification and detection stage having an input connected to the output of said chain, said last amplification and detection stage and said first summing device electrically connected to said second summing device, a delay line and a subtractor device, said second summing device being electrically connected through said delay line to said subtractor device, and said subtractor device being electrically connected to the output of said first summing device, a base and peak-clipping stage connected to the output of said subtractor device and producing usable signals.
Claim 4
Dependent Claim
148 words
Apparatus for shaping radar signals upon reception comprising a chain of successive amplifiers and detectors, said amplifiers being connected in series, each of said detectors being connected to the output of a respective amplifier, the output of each of said detectors being electrically connected to the input of a first summing device, a second summing device, said chain having an output last amplification and detection stage having an input connected to the output of said chain, said last amplification and detection stage and said first summing device electrically connected to said second summing device, a delay line and a subtractor device, said second summing device being electrically connected through said delay line to said subtractor device, and said subtractor device being electrically connected to the output of said first summing device, a base and peak-clipping stage connected to the output of said subtractor device and producing usable 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) | 1974-11-29 | 1975-05-31 | 1975-11-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-11-29 | 1979-05-31 | 1979-11-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-11-29 | 1983-05-31 | 1983-11-30 | $7700.00 | Window Closed / Lapsed |