Patent US3144646A successfully refreshed from Google Patents.
US3144646A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Doppler system
Assignee: Texas Instruments Inc
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Filing: 1959-07-08
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Granted: 1964-08-11
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Expires: 1979-07-08
Abstract
No abstract record available.
Inventors
- 👤 Joe J Breithaupt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 10:02
CPC Classifications
G; G01; G01S; G01S13/00; G01S13/02; G01S13/50; G01S1/00; G01S1/02; G01S1/08; G01S1/38; G01S13/06; G01S13/42
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
127 words
A DIRECTION FINDING SYSTEM COMPRISING AN ANTENNA FOR RADIATING SIGNALS INTO SPACE AND FOR RECEIVING SOME OF THE RADIATED SIGNALS WHICH HAVE BEEN REFLECTED BY AN OBJECT IN SPACE, MEANS FOR REVOLVING SAID ANTENNA IN A PLANE AT SUCH CONSTANT ANGULAR VELOCITY THAT THE RADIATED SIGNAL UNDERGOES SIGNIFICANT FREQUENCY MODULATION DUE TO THE DOPPLER EFFECT BETWEEN THE MOVING ANTENNA AND THE OBJECT IN SPACE, MEANS FOR IMPRESSING AN OUTGOING SIGNAL ON SAID ANTENNA, AND MEANS FOR DEMODULATING THE DOPPLER-PRODUCED FREQUENCY MODULATED SIGNAL RECEIVED BY SAID ANTENNA FROM SAID OBJECT IN SPACE, MEANS FOR DETECTING THE AMPLITUDE OF THE DEMODULATED SIGNAL TO FIND THE ELEVATIONAL ANGLE OF SAID OBJECT IN SPACE AND THE PHASE OF SAID DEMODULATED SIGNAL TO FIND THE AZIMUTHAL ANGLE OF SAID OBJECT IN SPACE.
Claim 2
Dependent Claim
127 words
A DIRECTION FINDING SYSTEM COMPRISING AN ANTENNA FOR RADIATING SIGNALS INTO SPACE AND FOR RECEIVING SOME OF THE RADIATED SIGNALS WHICH HAVE BEEN REFLECTED BY AN OBJECT IN SPACE, MEANS FOR REVOLVING SAID ANTENNA IN A PLANE AT SUCH CONSTANT ANGULAR VELOCITY THAT THE RADIATED SIGNAL UNDERGOES SIGNIFICANT FREQUENCY MODULATION DUE TO THE DOPPLER EFFECT BETWEEN THE MOVING ANTENNA AND THE OBJECT IN SPACE, MEANS FOR IMPRESSING AN OUTGOING SIGNAL ON SAID ANTENNA, AND MEANS FOR DEMODULATING THE DOPPLER-PRODUCED FREQUENCY MODULATED SIGNAL RECEIVED BY SAID ANTENNA FROM SAID OBJECT IN SPACE, MEANS FOR DETECTING THE AMPLITUDE OF THE DEMODULATED SIGNAL TO FIND THE ELEVATIONAL ANGLE OF SAID OBJECT IN SPACE AND THE PHASE OF SAID DEMODULATED SIGNAL TO FIND THE AZIMUTHAL ANGLE OF SAID OBJECT IN SPACE.
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) | 1967-08-11 | 1968-02-10 | 1968-08-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-08-11 | 1972-02-10 | 1972-08-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-08-11 | 1976-02-10 | 1976-08-11 | $7700.00 | Window Closed / Lapsed |