US4092645A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Radar jammer homing circuit
Assignee: Raytheon Co
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Filing: 1955-05-19
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Granted: 1978-05-30
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Expires: 1975-05-19
Abstract
Abstract 1. In a fire control radar system of the character which produces radar signals having a predetermined repetition period and which includes coupled in cascade; an intermediate frequency amplifier, a second detector, a video amplifier, a junction, an angle tracking gate, a selective switch, an angle tracking amplifier and integrating circuit, and an error detecting circuit for providing antenna control signals; and including also an automatic gain control loop coupled between the selective switch and the intermediate frequency amplifier; the system being adapted to automatically home on radar signals reflected off a distant object; the combination therewith of means for homing on signals emanating from the distant object, said means comprising: a jammer gate circuit coupled between the junction and the selective switch and being adapted to pass to said selective switch signals impressed on said jammer gate circuit from said junction during the application of a long enabling pulse which is applied during the latter portion of the repetition period.
Inventors
- 👤 William H. Proud
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 19:30
CPC Classifications
G; G01; G01S; G01S7/00; G01S7/02; G01S7/36
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
160 words
In a fire control radar system of the character which produces radar signals having a predetermined repetition period and which includes coupled in cascade; an intermediate frequency amplifier, a second detector, a video amplifier, a junction, an angle tracking gate, a selective switch, an angle tracking amplifier and integrating circuit, and an error detecting circuit for providing antenna control signals; and including also an automatic gain control loop coupled between the selective switch and the intermediate frequency amplifier; the system being adapted to automatically home on radar signals reflected off a distant object; the combination therewith of means for homing on signals emanating from the distant object, said means comprising: a jammer gate circuit coupled between the junction and the selective switch and being adapted to pass to said selective switch signals impressed on said jammer gate circuit from said junction during the application of a long enabling pulse which is applied during the latter portion of the repetition period.
Claim 2
Dependent Claim
160 words
In a fire control radar system of the character which produces radar signals having a predetermined repetition period and which includes coupled in cascade; an intermediate frequency amplifier, a second detector, a video amplifier, a junction, an angle tracking gate, a selective switch, an angle tracking amplifier and integrating circuit, and an error detecting circuit for providing antenna control signals; and including also an automatic gain control loop coupled between the selective switch and the intermediate frequency amplifier; the system being adapted to automatically home on radar signals reflected off a distant object; the combination therewith of means for homing on signals emanating from the distant object, said means comprising: a jammer gate circuit coupled between the junction and the selective switch and being adapted to pass to said selective switch signals impressed on said jammer gate circuit from said junction during the application of a long enabling pulse which is applied during the latter portion of the repetition period.
Claim 3
Dependent Claim
24 words
The combination of means according to claim 1 which further comprises: an audio frequency modulating voltage generator coupled to the automatic gain control loop.
Claim 4
Dependent Claim
36 words
The combination of means according to claim 1 which further comprises: a synchronous chopper coupled to the automatic gain control loop and being adapted to impress thereon a negative chopping voltage responsive to a synchronized pulse.
Claim 5
Dependent Claim
179 words
A radar counter-countermeasures system comprising: conventional intermediate frequency amplifying means; a second detector coupled thereto for rectifying the output signals of said means; a video amplifier coupled to said detector; a normal angle tracking gate circuit coupled to said video amplifier and being adapted to reject, responsive to a conventional range gate pulse, all signals except those representative of targets within a predetermined range; a jammer gate circuit also coupled to said video amplifier and being adapted to reject, responsive to a conventional indicator blanking pulse, all signals representative of objects and targets within the range of the system; angle tracking amplifier and integrator circuits; an automatic gain control circuit; a mode switch coupled to said angle tracking circuit and to said automatic gain control circuit and selectively coupled to one of said gate circuits; an automatic gain control bus coupled between said automatic gain control circuit and said intermediate frequency amplifier; an error detecting circuit coupled to said angle tracking amplifier and integrating circuit and adapted to provide signals suitable for controlling the orientation of a directional antenna.
Claim 6
Dependent Claim
179 words
A radar counter-countermeasures system comprising: conventional intermediate frequency amplifying means; a second detector coupled thereto for rectifying the output signals of said means; a video amplifier coupled to said detector; a normal angle tracking gate circuit coupled to said video amplifier and being adapted to reject, responsive to a conventional range gate pulse, all signals except those representative of targets within a predetermined range; a jammer gate circuit also coupled to said video amplifier and being adapted to reject, responsive to a conventional indicator blanking pulse, all signals representative of objects and targets within the range of the system; angle tracking amplifier and integrator circuits; an automatic gain control circuit; a mode switch coupled to said angle tracking circuit and to said automatic gain control circuit and selectively coupled to one of said gate circuits; an automatic gain control bus coupled between said automatic gain control circuit and said intermediate frequency amplifier; an error detecting circuit coupled to said angle tracking amplifier and integrating circuit and adapted to provide signals suitable for controlling the orientation of a directional antenna.
Claim 7
Dependent Claim
24 words
A radar counter-countermeasures system according to claim 4 which further comprises: an audio frequency modulating voltage generator coupled to said automatic gain control bus.
Claim 8
Dependent Claim
40 words
A radar counter-countermeasures system according to claim 4 which further comprises: a synchronous chopper coupled to said automatic gain control bus and being adapted to impress negative chopping signals upon said automatic gain control bus responsive to a synchronized signal.
References Cited (Backward Citations)
US4010469A
Cited
US2910691A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-05-29 | 1981-11-28 | 1982-05-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-05-29 | 1985-11-28 | 1986-05-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-05-29 | 1989-11-28 | 1990-05-30 | $7700.00 | Window Closed / Lapsed |