US3202989A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pulse compression radar receiver for ranging moving targets
Assignee: NEC Corp
•
Filing: 1961-07-06
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Granted: 1965-08-24
•
Expires: 1981-07-06
Abstract
No abstract record available.
Inventors
- 👤 Kagawa Yoichi
- 👤 Ishizaki Yasutoshi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 19:36
CPC Classifications
G; G01; G01S; G01S13/00; G01S13/02; G01S13/06; G01S13/08; G01S13/10; G01S13/26; G01S13/28; G01S13/284; G01S13/286
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
173 words
IN A RADAR SYSTEM WHEREIN THE TRANSMITTED SIGNAL COMPRISES A RELATIVELY WIDE PULSE HAVING AT LEAST N DIFFERENT FREQUENCY COMPONENTS IN A PREDETERMINED PHASE RELATIONSHIP AND IN WHICH SAID SIGNAL IS SUBJECT TO DOPPLER FREQUENCY SHIFTING; A RADAR RECEIVER COMPRISING: (A) AN INPUT CIRCUIT FOR RECEIVING AND SUPPLYING ECHOS OF SAID TRANSMITTED SIGNALS; (B) A DECODING CIRCUIT INCLUDING AT LEAST ONE DECODING UNIT CONNECTED TO RECEIVE THE ECHO SIGNALS FROM SAID INPUT CIRCUIT, EACH OF SAID ENCODING UNITS HAVING: (1) N+M FILTERS EACH HAVING A PRESELECTED PASS CHARACTERISTIC, CONNECTED IN PARALLEL TO RECEIVE SAID ECHO SIGNALS, WHERE M IS AN INTEGER DETERMINED BY THE ANTICIPATED DOPPLER FREQUENCY DEVIATION, (2) M+1 SEPARATE GROUPS OF PHASE SHIFT MEANS CONNECTED TO RECEIVE THE OUTPUTS OF SAID FILTERS, EACH OF SAID GROUPS HAVING N INDIVIDUAL PHASE SHIFT MEANS WITH A MOST ONE OF SAID INDIVIDUAL PHASE SHIFT MEANS OF SAID GROUP BEING CONNECTED TO ONE OF SAID FILTERS; (C) A SEPARATE OUTPUT TERMINAL FOR EACH OF SAID GROUPS, EACH OF SAID OUPUT TERMINALS BEING CONNECTED TO COM-
Claim 2
Dependent Claim
173 words
IN A RADAR SYSTEM WHEREIN THE TRANSMITTED SIGNAL COMPRISES A RELATIVELY WIDE PULSE HAVING AT LEAST N DIFFERENT FREQUENCY COMPONENTS IN A PREDETERMINED PHASE RELATIONSHIP AND IN WHICH SAID SIGNAL IS SUBJECT TO DOPPLER FREQUENCY SHIFTING; A RADAR RECEIVER COMPRISING: (A) AN INPUT CIRCUIT FOR RECEIVING AND SUPPLYING ECHOS OF SAID TRANSMITTED SIGNALS; (B) A DECODING CIRCUIT INCLUDING AT LEAST ONE DECODING UNIT CONNECTED TO RECEIVE THE ECHO SIGNALS FROM SAID INPUT CIRCUIT, EACH OF SAID ENCODING UNITS HAVING: (1) N+M FILTERS EACH HAVING A PRESELECTED PASS CHARACTERISTIC, CONNECTED IN PARALLEL TO RECEIVE SAID ECHO SIGNALS, WHERE M IS AN INTEGER DETERMINED BY THE ANTICIPATED DOPPLER FREQUENCY DEVIATION, (2) M+1 SEPARATE GROUPS OF PHASE SHIFT MEANS CONNECTED TO RECEIVE THE OUTPUTS OF SAID FILTERS, EACH OF SAID GROUPS HAVING N INDIVIDUAL PHASE SHIFT MEANS WITH A MOST ONE OF SAID INDIVIDUAL PHASE SHIFT MEANS OF SAID GROUP BEING CONNECTED TO ONE OF SAID FILTERS; (C) A SEPARATE OUTPUT TERMINAL FOR EACH OF SAID GROUPS, EACH OF SAID OUPUT TERMINALS BEING CONNECTED TO COM-
References Cited (Backward Citations)
US2952808A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-08-23 | 1969-02-22 | 1969-08-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-08-23 | 1973-02-22 | 1973-08-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-08-23 | 1977-02-22 | 1977-08-24 | $7700.00 | Window Closed / Lapsed |