US3588894A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Automatic gain control system for high-range-resolution radar
Assignee: United States Department of the Navy
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Filing: 1969-08-20
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Granted: 1971-06-28
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Expires: 1989-08-20
Abstract
Abstract AN AUTOMATIC GAIN CONTROL (AGC) SYSTEM FOR RECEIVERS USED IN HIGH-RANGE-RESOLUTION RADAR IS DISCLOSED. RECEIVED, VERY SHORT RADAR ECHOES ARE TIME-COMPRESSED BY MEANS OF A MICROWAVE DELAY LINE, RECTIFIED BY MEANS OF A SQUARE LAW DETECTOR, AND STRECHED WITH RESPECT TO TIME BY MEANS OF A SAMPLING OSCILLOSCOPE. THE RESULTANT STRETCHED PULSES ARE FED BACK THROUGH A THRESHOLD DEVICE, A PULSE PEAK DETECTOR, AND A LOW-PASS FILTER TO PROVIDE A CONTROL VOLTAGE TO PIN DIODES WHICH FUNCTION AS VOLTAGE CONTROLLED ATTENUATORS IN THE FORWARD SIGNAL PATH.
Inventors
- 👤 Michael J Prickett
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 20:01
CPC Classifications
H; H03; H03G; H03G3/00; H03G3/20; H03G3/30; H03G3/3052; H03G3/3073; G; G01; G01S; G01S13/00; G01S13/02; G01S13/06; G01S13/08; G01S13/10; G01S13/26; G01S13/28; G01S13/282
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-06-27 | 1974-12-27 | 1975-06-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-06-27 | 1978-12-27 | 1979-06-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-06-27 | 1982-12-27 | 1983-06-28 | $7700.00 | Window Closed / Lapsed |