Patent US4429311A successfully refreshed from Google Patents.
US4429311A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dual beam radar jamming system
Assignee: Northrop Grumman Guidance and Electronics Co Inc
•
Filing: 1970-11-06
•
Granted: 1984-01-31
•
Expires: 1990-11-06
Abstract
Abstract A dual beam radar jamming system for detecting and separating each radar signal of a dual beam radar system and then generating selectively modulated dual return signals for transmission back to the radar source to deceive its tracking apparatus. The jamming system includes a control unit which enables an operator to simultaneously monitor and control the jamming of each beam of a TWS radar system.
Inventors
- 👤 James R. Barewald
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 08:25
CPC Classifications
G; G01; G01S; G01S7/00; G01S7/02; G01S7/38
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
131 words
A dual beam radar jamming system, comprising: radar receiver means responsive to input radar signals having freqencies within a first frequency band including a first sub-band and a second sub-band and operative to develop a broad band signal commensurate therewith; directional filter means responsive to said broad band signal and operative to separate first radar signals having frequencies within said first sub-band and second radar signals having frequencies within said second sub-band; control means for developing a first control signal and a second control signal; first repeater means responsive to said first control signal and operative to amplitude modulate said first radar signals to develop first jamming signals; and second repeater means responsive to said second control signal and operative to amplitude modulate said second signals to develop second jamming signals.
Claim 2
Dependent Claim
131 words
A dual beam radar jamming system, comprising: radar receiver means responsive to input radar signals having freqencies within a first frequency band including a first sub-band and a second sub-band and operative to develop a broad band signal commensurate therewith; directional filter means responsive to said broad band signal and operative to separate first radar signals having frequencies within said first sub-band and second radar signals having frequencies within said second sub-band; control means for developing a first control signal and a second control signal; first repeater means responsive to said first control signal and operative to amplitude modulate said first radar signals to develop first jamming signals; and second repeater means responsive to said second control signal and operative to amplitude modulate said second signals to develop second jamming signals.
Claim 3
Dependent Claim
38 words
A dual beam radar jamming system as recited in claim 1 wherein said control means includes means for simultaneously displaying visual analogs of at least one of said first and second radar signals and its corresponding jamming signal.
Claim 4
Dependent Claim
142 words
A dual beam radar jamming system as recited in claim 1 wherein said receiver means comprises means being responsive to additional input radar signals having frequencies within a second frequency band including a third sub-band and a fourth sub-band and is further operative to cause said broad band signal to include said additional input radar signals, and wherein said directional filter means comprises means being operative to separate third radar signals having frequencies within said third sub-band and fourth radar signals having frequencies within said fourth sub-band, said first repeater means comprises means being responsive to said first control signal and operative to amplitude modulate said third radar signals to develop third jamming signals, and said second repeater means comprises means being responsive to said second control signal and operative to amplitude modulate said fourth radar signals to develop fourth jamming signals.
Claim 5
Dependent Claim
31 words
A dual beam radar jamming system as recited in claim 3 wherein said control means includes a signal display means for displaying visual analogs of selected ones of said jamming signals.
Claim 6
Dependent Claim
166 words
A dual beam radar jamming system, comprising: radar receiver means responsive to input radar signals having frequencies within a first frequency band including a first sub-band and a second sub-band, and a second frequency band including a third sub-band and a fourth sub-band, said receiver means being operative to develop a broad band signal commensurate with said input radar signals; directional filter means responsive to said broad band signal and operative to develop first, second, third and fourth radar signals corresponding respectively to input radar signals falling within said first, second, third and fourth sub-bands; control means for developing a first control signal and a second control signal; first repeater means responsive to said first control signal and operative to amplitude modulate at least one of said first and third radar signals to develop corresponding jamming signals; second repeater means responsive to said second control signal and operative to amplitude modulate at least one of said second and fourth radar signals to develop corresponding jamming signals.
Claim 7
Dependent Claim
166 words
A dual beam radar jamming system, comprising: radar receiver means responsive to input radar signals having frequencies within a first frequency band including a first sub-band and a second sub-band, and a second frequency band including a third sub-band and a fourth sub-band, said receiver means being operative to develop a broad band signal commensurate with said input radar signals; directional filter means responsive to said broad band signal and operative to develop first, second, third and fourth radar signals corresponding respectively to input radar signals falling within said first, second, third and fourth sub-bands; control means for developing a first control signal and a second control signal; first repeater means responsive to said first control signal and operative to amplitude modulate at least one of said first and third radar signals to develop corresponding jamming signals; second repeater means responsive to said second control signal and operative to amplitude modulate at least one of said second and fourth radar signals to develop corresponding jamming signals.
Claim 8
Dependent Claim
84 words
A dual beam radar jamming system as recited in claim 5 wherein said directional filter means includes means for separating said broad band signal into a first intermediate signal including radar signals falling within said first frequency band, and a second intermediate signal including radar signals falling within said second frequency band; and filter means for separating said first and second radar signals out of said first intermediate signal, and for separating said third and fourth radar signals out of said second intermediate signal.
Claim 9
Dependent Claim
33 words
A dual beam radar jamming system as recited in claim 5 wherein said control means includes means for developing visual analogs of selected ones of said first, second, third and fourth radar signals.
Claim 10
Dependent Claim
28 words
A dual beam radar jamming system as recited in claim 5 wherein said control means includes means for developing visual analogs of selected ones of said jamming signals.
References Cited (Backward Citations)
US4149167A
Cited
US3896439A
Cited
US4264909A
Cited
US3517388A
Cited
US3955200A
Cited
US3187258A
Cited
US3500401A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1987-01-30 | 1987-08-01 | 1988-01-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-01-30 | 1991-08-01 | 1992-01-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-01-30 | 1995-08-01 | 1996-01-31 | $7700.00 | Window Closed / Lapsed |