Patent US3696416A successfully refreshed from Google Patents.
US3696416A
Expired / Lapsed
US
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Radar installation
Assignee: Thales SA
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Filing: 1970-04-27
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Granted: 1972-10-03
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Expires: 1990-04-27
Abstract
Abstract A radar installation is provided in which the receiving aerial for the echoes is of the type used in monopulse radar, but in which the processing circuitry for delivering the required final information is of the character utilized in an electromechanical scanning system. The echoes picked up by the aerial are thus subjected to some of the conventional processing in monopulse systems and the three signals resulting from this partial processing are transformed into a single signal of the type delivered by an aerial of an electromechanical scanning radar.
Inventors
- 👤 Jacques Badiano
- 👤 Henri Commissaire
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 07:55
CPC Classifications
G; G01; G01S; G01S13/00; G01S13/02; G01S13/06; G01S13/42; G01S13/44; G01S13/4436
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
153 words
A radar installation comprising: a monopulse radar receiver provided with an aerial centered on an axis and several channels for the generation of input signals derived from echoes picked up by said aerial, said channels including a first and a second channel respectively delivering a first and a second erRor signal measuring deviations of the direction of incidence of said echoes from the aerial axis in two mutually orthogonal planes; a generator of two conjugate oscillations; first and second modulator means in said first and second channels connected to said generator for respectively heterodyning said first and second error signals with said conjugate oscillations; adding means for merging the outputs of said first and second modulator means into a combined signal; and first and second demodulator means beyond said adding means connected to said generator and to said adding means for deriving from said combined signal respective output signals proportional to said deviations.
Claim 2
Dependent Claim
153 words
A radar installation comprising: a monopulse radar receiver provided with an aerial centered on an axis and several channels for the generation of input signals derived from echoes picked up by said aerial, said channels including a first and a second channel respectively delivering a first and a second erRor signal measuring deviations of the direction of incidence of said echoes from the aerial axis in two mutually orthogonal planes; a generator of two conjugate oscillations; first and second modulator means in said first and second channels connected to said generator for respectively heterodyning said first and second error signals with said conjugate oscillations; adding means for merging the outputs of said first and second modulator means into a combined signal; and first and second demodulator means beyond said adding means connected to said generator and to said adding means for deriving from said combined signal respective output signals proportional to said deviations.
Claim 3
Dependent Claim
22 words
An installation as defined in claim 1 wherein said channels include a third channel delivering a summing signal to said adding means.
Claim 4
Dependent Claim
17 words
An installation as defined in claim 2, further comprising a 90* phase shifter in said third channel.
Claim 5
Dependent Claim
36 words
An installation as defined in claim 3 wherein each of said modulator means comprises a pair of matched field-effect transistors with gates connected in parallel to the respective channel and with sources connected to said generator.
Claim 6
Dependent Claim
43 words
An installation as defined in claim 4, further comprising a pair of amplifiers respectively inserted between said sources and said generator, said amplifiers having the same gain but introducing a relative 180* phase shift in the energization of said sources from said generator.
Claim 7
Dependent Claim
21 words
An installation as defined in claim 5 wherein said field-effect transistors are provided with potentiometer means for adjusting their neutral point.
Claim 8
Dependent Claim
18 words
An installation as defined in claim 1 wherein said modulator means are double-sideband amplitude modulators with carrier suppression.
Claim 9
Dependent Claim
16 words
An installation as defined in claim 1 wherein said adding means comprises a resistive summing circuit.
Claim 10
Dependent Claim
19 words
An installation as defined in claim 1 wherein said aerial comprises four quadrantal wave collectors grouped about said axis.
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) | 1975-10-03 | 1976-04-03 | 1976-10-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-10-03 | 1980-04-03 | 1980-10-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-10-03 | 1984-04-03 | 1984-10-03 | $7700.00 | Window Closed / Lapsed |