Patent US3803601A successfully refreshed from Google Patents.
US3803601A
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Incoherent turbulence detector
Assignee: Individual
•
Filing: 1973-03-19
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Granted: 1974-04-09
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Expires: 1993-03-19
Abstract
Abstract The invention disclosed herein provides an improvement on existent incoherent turbulence detectors by providing predetermined frequency shift in the existing detector circuitry to obtain improved resolution.
Inventors
- 👤 R Serafin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 12:50
CPC Classifications
G; G01; G01S; G01S13/00; G01S13/88; G01S13/95; Y; Y02; Y02A; Y02A90/00; Y02A90/10
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
207 words
An improved incoherent turbulence detector comprising: a. input circuitry for receiving radar signals; b. an IF amplifier circuit to receive said received signals; c. a frequency shifting circuit coupled to receive signals from said IF amplifier; d. a first power splitting circuit coupled to receive signals from said phase shift circuit; e. delay circuitry for receiving a signal from said IF amplifier and coupled to a second power splitting circuit; f. a summing circuit coupled to receive signals from said first and second power splitting circuits; g. first, second and third detectors respectively connected to receive signals from said first power splitting circuit; said summing circuit and said second power splitting circuit; h. first, second and third sample and holding circuits coupled respectively to said first, second and third detectors; i. first, second and third R meters coupled respectively to said first, second and third sample and holding circuits; j. first and second low pass filters coupled respectively to first and third sample and holding circuits; and k. an arithmetic unit coupled to receive the output from said first and second low pass filters and said first, second and third R meters to provide a detected output to display the return signals to indicate existence of turbulence.
Claim 2
Dependent Claim
207 words
An improved incoherent turbulence detector comprising: a. input circuitry for receiving radar signals; b. an IF amplifier circuit to receive said received signals; c. a frequency shifting circuit coupled to receive signals from said IF amplifier; d. a first power splitting circuit coupled to receive signals from said phase shift circuit; e. delay circuitry for receiving a signal from said IF amplifier and coupled to a second power splitting circuit; f. a summing circuit coupled to receive signals from said first and second power splitting circuits; g. first, second and third detectors respectively connected to receive signals from said first power splitting circuit; said summing circuit and said second power splitting circuit; h. first, second and third sample and holding circuits coupled respectively to said first, second and third detectors; i. first, second and third R meters coupled respectively to said first, second and third sample and holding circuits; j. first and second low pass filters coupled respectively to first and third sample and holding circuits; and k. an arithmetic unit coupled to receive the output from said first and second low pass filters and said first, second and third R meters to provide a detected output to display the return signals to indicate existence of turbulence.
Claim 3
Dependent Claim
25 words
The improved incoherent turbulence detector of claim 1 wherein there is included a local oscillator circuit to generate frequency shift in said frequency shifting circuit.
Claim 4
Dependent Claim
44 words
The improvement of claim 2 wherein said frequency shifting circuit includes a local oscillator circuit connected to a mixing circuit wherein a signal from said local oscillator is combined with a signal from an IF amplifier and fed thru a first band pass filter.
Claim 5
Dependent Claim
41 words
The improvement of claim 3 wherein there is provided a second circuit for combining the output from said first band pass filter and said local oscillator to provide a second mixed signal which is coupled to a second pass band filter.
References Cited (Backward Citations)
US3341844A
Cited
US3646555A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-04-08 | 1977-10-08 | 1978-04-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-04-08 | 1981-10-08 | 1982-04-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-04-08 | 1985-10-08 | 1986-04-09 | $7700.00 | Window Closed / Lapsed |