US3093828A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Direction finding antenna
Assignee: Individual
•
Filing: 1961-06-20
•
Granted: 1963-06-11
•
Expires: 1981-06-20
Abstract
No abstract record available.
Inventors
- 👤 Sherla L Stutz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 02:25
CPC Classifications
H; H01; H01Q; H01Q3/00; H01Q3/44; G; G01; G01S; G01S1/00; G01S1/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
183 words
AN AUTOMATIC DIRECTION FINDING ANTENNA SYSTEM FOR DETERMINING THE ANGLE OF ARRIVAL OF A RADIO FREQUENCY SIGNAL COMPRISING: AN ANTENNA; MEANS PROVIDING A GROUND PLANE FOR SAID ANTENNA HAVING A PLURALITY OF SERIES CONNECTED INTERFERENCE ELEMENTS EQUALLY AND UNIFORMLY SPACED FROM SAID ANTENNA INSERTED IN THE CURRENT PATH OF SAID GROUND PLANE; MEANS FOR GENERATING A SINUSOIADAL SIGNAL WAVE; MEANS FOR RECTIFYING SAID SINUSOIDAL WAVE THEREBY PROVIDING A PULSED SIGNAL WAVE; MEANS FOR APPLYING SAID PULSED SIGNAL WAVE TO SAID ELEMENTS IN SERIES THEREBY SEQUENTIALLY ENERGIZING SAID INTERFERENCE ELEMENTS AND CAUSING A ROTATING ASYMMETRIC RECEIVING ANTENNA PATTERN WHICH ACTS TO MODUALATE ANY RADIO FREQUENCYT SIGNAL IMPRESSED ON THE ANTENNA; MEANS FOR DEMODULATING SAID MODULATED RADIO FREUENCY SIGNAL COUPLED TO SAID ANTENNA; A CATHODE RAY TUBE HAVING TWO PARIS OF DEFLECTION PLATES; MEANS FOR GENERATING A CIRCULAR SWEEP ON SAID CATHODE RAY TUBE; MEANS COUPLING THE OUTPUT OF SAID SINUSOIDAL SIGNAL GENERATOR TO SAID CIRCULAR SWEEP GENERATOR; AND MEANS COUPLED TO SAID CIRCULAR SWEEP GENERATOR FOR CAUSING AN INCREASE IN VOLTAGE OUTPUT FROM SAID CIRCULAR SWEEP GENERATOR DURING A PERIOD WHEN SAID DEMODULATING MEANS
Claim 2
Dependent Claim
183 words
AN AUTOMATIC DIRECTION FINDING ANTENNA SYSTEM FOR DETERMINING THE ANGLE OF ARRIVAL OF A RADIO FREQUENCY SIGNAL COMPRISING: AN ANTENNA; MEANS PROVIDING A GROUND PLANE FOR SAID ANTENNA HAVING A PLURALITY OF SERIES CONNECTED INTERFERENCE ELEMENTS EQUALLY AND UNIFORMLY SPACED FROM SAID ANTENNA INSERTED IN THE CURRENT PATH OF SAID GROUND PLANE; MEANS FOR GENERATING A SINUSOIADAL SIGNAL WAVE; MEANS FOR RECTIFYING SAID SINUSOIDAL WAVE THEREBY PROVIDING A PULSED SIGNAL WAVE; MEANS FOR APPLYING SAID PULSED SIGNAL WAVE TO SAID ELEMENTS IN SERIES THEREBY SEQUENTIALLY ENERGIZING SAID INTERFERENCE ELEMENTS AND CAUSING A ROTATING ASYMMETRIC RECEIVING ANTENNA PATTERN WHICH ACTS TO MODUALATE ANY RADIO FREQUENCYT SIGNAL IMPRESSED ON THE ANTENNA; MEANS FOR DEMODULATING SAID MODULATED RADIO FREUENCY SIGNAL COUPLED TO SAID ANTENNA; A CATHODE RAY TUBE HAVING TWO PARIS OF DEFLECTION PLATES; MEANS FOR GENERATING A CIRCULAR SWEEP ON SAID CATHODE RAY TUBE; MEANS COUPLING THE OUTPUT OF SAID SINUSOIDAL SIGNAL GENERATOR TO SAID CIRCULAR SWEEP GENERATOR; AND MEANS COUPLED TO SAID CIRCULAR SWEEP GENERATOR FOR CAUSING AN INCREASE IN VOLTAGE OUTPUT FROM SAID CIRCULAR SWEEP GENERATOR DURING A PERIOD WHEN SAID DEMODULATING MEANS
References Cited (Backward Citations)
US3037185A
Cited
US2994874A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1966-06-10 | 1966-12-10 | 1967-06-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-06-10 | 1970-12-10 | 1971-06-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-06-10 | 1974-12-10 | 1975-06-11 | $7700.00 | Window Closed / Lapsed |