Patent US3342181A successfully refreshed from Google Patents.
US3149333A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Detection of targets in clutter
Assignee: Individual
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Filing: 1962-11-09
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Granted: 1964-09-15
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Expires: 1982-11-09
Abstract
No abstract record available.
Inventors
- 👤 Robert R Campbell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 00:29
CPC Classifications
G; G01; G01S; G01S13/00; G01S13/02; G01S13/50; G01S13/52; G01S13/522; G01S13/524; G01S13/53; G01S13/58; G01S13/64
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
168 words
IN A RADAR RECEIVER CIRCUIT HAVING A PLURALITY OF INTERMEDIATE FREQUENCY RANGE CHANNELS, EACH CHANNEL APPLYING OUTPUT SIGNALS TO A CONTIGUOUS FILTER BANK, EACH CONTIGUOUS FILTER BANK HAVING CORRESPONDING FREQUENCY FILTERS, AND EACH FREQUENCY FILTER BEING IN SERIES WITH AN AMPLIFIER AND A DETECTOR PROVIDING A FILTER CHANNEL, A CIRCUIT FOR DETECTING TARGETS IN CLUTTER COMPRISING: MEANS AVERAGING THE CLUTTER AND SIGNAL VOLTAGE AMPLITUDES FOR ALL CORRESPONDING FREQUENCIES OF CORRESPONDING FILTER CHANNELS; A GAIN CONTROL AMPLIFIER FOR EACH FILTER CHANNEL COUPLED TO CONTROL THE GAIN OF THE AMPLIFIER IN ITS FILTER CHANNEL; A REFERENCE VOLTAGE; AND MEANS PROVIDING THE DIFFERENCE IN AMPLITUDE BETWEEN SAID REFERENCE VOLTAGE AND THE AVERAGE CLUTTER AND SIGNAL VOLTAGE FOR CORRESPONDING FILTER CHANNELS AND APPLYING SAME TO THE GAIN CONTROL AMPLIFIER OF ITS GROUP OF FILTER CHANNELS OF CORRESPONDING FREQUENCY TO CONTROL THE GAIN THEREOF AND ESTABLISH A THRESHOLD JUST ABOVE THE AVERAGE CLUTTER SIGNAL VOLTAGE FOR THOSE FILTER CHANNELS OF THE GROUP WHEREBY TARGET SIGNALS WILL BE READILY DETECTED BY SAID CORRESPONDING DETECTORS.
Claim 2
Dependent Claim
168 words
IN A RADAR RECEIVER CIRCUIT HAVING A PLURALITY OF INTERMEDIATE FREQUENCY RANGE CHANNELS, EACH CHANNEL APPLYING OUTPUT SIGNALS TO A CONTIGUOUS FILTER BANK, EACH CONTIGUOUS FILTER BANK HAVING CORRESPONDING FREQUENCY FILTERS, AND EACH FREQUENCY FILTER BEING IN SERIES WITH AN AMPLIFIER AND A DETECTOR PROVIDING A FILTER CHANNEL, A CIRCUIT FOR DETECTING TARGETS IN CLUTTER COMPRISING: MEANS AVERAGING THE CLUTTER AND SIGNAL VOLTAGE AMPLITUDES FOR ALL CORRESPONDING FREQUENCIES OF CORRESPONDING FILTER CHANNELS; A GAIN CONTROL AMPLIFIER FOR EACH FILTER CHANNEL COUPLED TO CONTROL THE GAIN OF THE AMPLIFIER IN ITS FILTER CHANNEL; A REFERENCE VOLTAGE; AND MEANS PROVIDING THE DIFFERENCE IN AMPLITUDE BETWEEN SAID REFERENCE VOLTAGE AND THE AVERAGE CLUTTER AND SIGNAL VOLTAGE FOR CORRESPONDING FILTER CHANNELS AND APPLYING SAME TO THE GAIN CONTROL AMPLIFIER OF ITS GROUP OF FILTER CHANNELS OF CORRESPONDING FREQUENCY TO CONTROL THE GAIN THEREOF AND ESTABLISH A THRESHOLD JUST ABOVE THE AVERAGE CLUTTER SIGNAL VOLTAGE FOR THOSE FILTER CHANNELS OF THE GROUP WHEREBY TARGET SIGNALS WILL BE READILY DETECTED BY SAID CORRESPONDING DETECTORS.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-09-15 | 1968-03-16 | 1968-09-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-09-15 | 1972-03-16 | 1972-09-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-09-15 | 1976-03-16 | 1976-09-15 | $7700.00 | Window Closed / Lapsed |