Patent US3896442A successfully refreshed from Google Patents.
US3896442A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Correlation processor
Assignee: United States Department of the Army
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Filing: 1973-09-04
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Granted: 1975-07-22
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Expires: 1993-09-04
Abstract
Abstract Each jamming target transmits a broadband noise that is uncorrelated with any other jaming target. The noise that each target transmits is received by a monopulse radar antenna on a missile and is retransmitted to the ground processor by that missile. The ground processor also receives directly the energy from the jamming targets. Use is made of the different signal paths of each jamming target to the missile and to the processor to obtain a correlation function for each target, by delaying the direct signal to the processor and mixing it with the signal from the missile so as to maximize the mixer''s output for a selected target.
Inventors
- 👤 John R Heminway
- 👤 Herbert M Sanborn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 09:34
CPC Classifications
F; F41; F41G; F41G7/00; F41G7/20; F41G7/30
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
276 words
Correlator system comprising at least one signal generator means; first, second, and third receiving means; said first receiving means being located spacially from said second and third receiving means; transmitting means on said first receiving means; said first receiving means receiving signals from said signal generating means and transmitting them to said second receiving means; said third receiving means receiving the signals generated by said signal generating means; a variable delay line; first mixer means having first and second inputs and an output; an output of said third receiving means connected through said variable delay line to one of the inputs of said mixer means; an output of said second receiving means being connected to the other input of said mixer means; said variable delay line having a controlled input; further comprising a range control loop connected between the output of said variable delay line and said controlled input; said range control loop comprising first and second channels; each channel having a product detector which has first and second inputs; each product detector having the signal from said second receiving means connected to the first input; a delay line connected between the output of the variable delay line and the other input of said product detector in said first channel; the other input of the product detector in said second channel being connected directly to the output of said variable delay line; a differential amplifer having first and second inputs and an output; the outputs of said product detectors being connected to different inputs of said differential amplifier; and the output of the differential amplifier being connected to the controlled input of said variable delay line.
Claim 2
Dependent Claim
276 words
Correlator system comprising at least one signal generator means; first, second, and third receiving means; said first receiving means being located spacially from said second and third receiving means; transmitting means on said first receiving means; said first receiving means receiving signals from said signal generating means and transmitting them to said second receiving means; said third receiving means receiving the signals generated by said signal generating means; a variable delay line; first mixer means having first and second inputs and an output; an output of said third receiving means connected through said variable delay line to one of the inputs of said mixer means; an output of said second receiving means being connected to the other input of said mixer means; said variable delay line having a controlled input; further comprising a range control loop connected between the output of said variable delay line and said controlled input; said range control loop comprising first and second channels; each channel having a product detector which has first and second inputs; each product detector having the signal from said second receiving means connected to the first input; a delay line connected between the output of the variable delay line and the other input of said product detector in said first channel; the other input of the product detector in said second channel being connected directly to the output of said variable delay line; a differential amplifer having first and second inputs and an output; the outputs of said product detectors being connected to different inputs of said differential amplifier; and the output of the differential amplifier being connected to the controlled input of said variable delay line.
Claim 3
Dependent Claim
257 words
Correlator system comprising at least one signal generator means; first, second, and third receiving means; said first receiving means being located spacially from said second and third receiving means; transmitting means on said first receiving means; said first receiving means receiving signals from said signal generating means and transmitting them to said second receiving means; said third receiving means receiving the signals generated by said signal generating means; a variable delay line; first mixer means having first and second inputs and an output; an output of said third receiving means connected through said variable delay line to one of the inputs of saiD mixer means; an output of said second receiving means being connected to the other input of said mixer means; said first receiving means containing a monopulse radar receiver; said first receiving means having first and second outputs which are transmitted to said second receiving means; first and second channels; said second receiving means sending the first and second outputs of said first receiving means to said first and second channels respectively; said first channel being the connection to said first mixer means; a second mixer means having two inputs and an output; the first input of said second mixer means being connected to the second output of said second receiving means; said variable delay line being connected to the second input of said second mixer means; a phase detector having two inputs and an output; and the output of said first and second mixer means being connected to different inputs of said phase detector.
Claim 4
Dependent Claim
257 words
Correlator system comprising at least one signal generator means; first, second, and third receiving means; said first receiving means being located spacially from said second and third receiving means; transmitting means on said first receiving means; said first receiving means receiving signals from said signal generating means and transmitting them to said second receiving means; said third receiving means receiving the signals generated by said signal generating means; a variable delay line; first mixer means having first and second inputs and an output; an output of said third receiving means connected through said variable delay line to one of the inputs of saiD mixer means; an output of said second receiving means being connected to the other input of said mixer means; said first receiving means containing a monopulse radar receiver; said first receiving means having first and second outputs which are transmitted to said second receiving means; first and second channels; said second receiving means sending the first and second outputs of said first receiving means to said first and second channels respectively; said first channel being the connection to said first mixer means; a second mixer means having two inputs and an output; the first input of said second mixer means being connected to the second output of said second receiving means; said variable delay line being connected to the second input of said second mixer means; a phase detector having two inputs and an output; and the output of said first and second mixer means being connected to different inputs of said phase detector.
Claim 5
Dependent Claim
31 words
A system as set forth in claim 2 wherein first and second delay lines are connected between said first and second outputs of said second receiving means and the mixer means.
Claim 6
Dependent Claim
37 words
A system as set forth in claim 3 wherein said variable delay line has a controlled input; and further comprising a range control loop connected between the output of said variable delay line and its controlled input.
Claim 7
Dependent Claim
178 words
A system as set forth in claim 4 further comprising third, fourth, and fifth mixer means; a local oscillator; said third, fourth, and fifth mixer means each having two inputs and an output; the first output of said second receiving means being connected to one input of said third mixer means; the second output of said second receiving means being connected to one input of said fourth mixer means; said local oscillator being connected to the other input of each of the said third and fourth mixer means; the output of said third mixer means being connected to an input of said first mixer means; the output of said fourth mixer means being connected to an input of said second mixer means; a voltage control oscillator having an output and a controlled input; a bandpass filter; a discriminator; an integrator; said bandpass filter, discriminator, and integrator being connected in a series circuit between the output of said first mixer means and the controlled input of said voltage control oscillator whereby the output of said first mixer is maximized.
Claim 8
Dependent Claim
41 words
A system as set forth in claim 5 wherein said signal generators consist of a plurality of jamming target means; and said first receiving means is a missile means having a monopulse antenna to receive the signals from said target means.
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) | 1978-07-21 | 1979-01-20 | 1979-07-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-07-21 | 1983-01-20 | 1983-07-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-07-21 | 1987-01-20 | 1987-07-22 | $7700.00 | Window Closed / Lapsed |