Patent US4112592A successfully refreshed from Google Patents.
Patent US3577146A successfully refreshed from Google Patents.
US3577146A
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US
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Passive monopulse ranging system
Assignee: Individual
•
Filing: 1969-04-16
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Granted: 1971-05-04
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Expires: 1989-04-16
Abstract
Abstract A monopulse ranging system where incoming signals from two antennas are converted to an intermediate frequency and passed through corrective delays with one of the delays being controlled by a delay balance discriminator. The detected envelopes of the signals are fed to a differential amplifier, the output thereof being fed to a range computer and the delay balance discriminator detects the differences to be fed back to one of the delay controls.
Inventors
- 👤 Michael Freier
- 👤 Leonard P Balazer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 18:57
CPC Classifications
G; G01; G01S; G01S11/00; G01S11/02
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
156 words
A monopuLse-ranging system comprising: a. first and second means spaced a predetermined distance for receiving a signal; b. a local oscillator; c. a first mixer fed by the local oscillator and the first signal-receiving means; d. a variable time delay fed by the first mixer; e. a first envelope detector fed by the variable time delay; f. a second mixer fed by the local oscillator and the second signal-receiving means; g. a second time delay fed by the second mixer; h. a second envelope detector; i. a differential amplifier fed by the first and second envelope detectors; j. a delay balance discriminator fed by the differential amplifier and connected to the variable delay for the control thereof; k. a low pass filter fed by the differential amplifier; and l. means for computing the range fed by the output of the low pass filter, a reference signal from the delay balance discriminator, and the second envelope detector.
Claim 2
Dependent Claim
156 words
A monopuLse-ranging system comprising: a. first and second means spaced a predetermined distance for receiving a signal; b. a local oscillator; c. a first mixer fed by the local oscillator and the first signal-receiving means; d. a variable time delay fed by the first mixer; e. a first envelope detector fed by the variable time delay; f. a second mixer fed by the local oscillator and the second signal-receiving means; g. a second time delay fed by the second mixer; h. a second envelope detector; i. a differential amplifier fed by the first and second envelope detectors; j. a delay balance discriminator fed by the differential amplifier and connected to the variable delay for the control thereof; k. a low pass filter fed by the differential amplifier; and l. means for computing the range fed by the output of the low pass filter, a reference signal from the delay balance discriminator, and the second envelope detector.
Claim 3
Dependent Claim
42 words
A monopulse-ranging system according to claim 1 which further comprises: a. first and second gated amplifiers interposed between the first and second signal-receiving means and the first and second mixers respectively; and b. means for gating the first and second gated amplifiers.
Claim 4
Dependent Claim
81 words
A monopulse-ranging system according to claim 2 which further comprises: a. first and second RF gates; b. first and second directional couplers fed respectively by the first and second RF gates, the RF gate-directional coupler combinations being interposed one each between the signal-receiving means and the gated amplifiers; and c. a calibration generator having an external frequency input source, the output of the calibration generator being fed to the first and second RF gates and the first and second directional couplers.
References Cited (Backward Citations)
US3134104A
Cited
US3430243A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-05-03 | 1974-11-02 | 1975-05-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-05-03 | 1978-11-02 | 1979-05-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-05-03 | 1982-11-02 | 1983-05-04 | $7700.00 | Window Closed / Lapsed |