US3680106A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for displaying the range detection capability of a search radar in a noisy environment
Assignee: United States Department of the Navy
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Filing: 1963-05-07
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Granted: 1972-07-25
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Expires: 1983-05-07
Abstract
Abstract A means of displaying the range detection capability of a search radar in a noisy environment comprising: A CONSTANT FALSE ALARM RADAR RECEIVER FOR RECEIVING ECHO RADIO FREQUENCY SIGNALS REFLECTED FROM TARGETS AND SUBJECT TO BROADBAND NOISE JAMMING, SAID RECEIVER HAVING A WIDEBAND AMPLIFIER OF RADIO FREQUENCY AND A CONSTANT FALSE ALARM LIMITING CIRCUIT THEREIN; A CATHODE RAY DISPLAY TUBE CIRCUIT INCLUDING A SWEEP GENERATOR AND A DEFLECTION CIRCUIT FOR PRODUCING CATHODE RAY TUBE BEAM TRACES ON THE TUBE SCREEN, AND INCLUDING TWO BEAM INTENSITY CONTROLLING ELECTRODES, SAID SWEEP GENERATOR BEING COUPLED TO THE SYNCHRONIZING CIRCUITS OF SAID RECEIVER TO SYNCHRONIZE THE GENERATION OF SWEEP VOLTAGES FOR SAID DEFLECTION CIRCUITS AND ONE OF SAID INTENSITY CONTROLLING ELECTRODES BEING COUPLED TO THE VIDEO OUTPUT OF SAID RECEIVER TO PAINT TARGETS ON SAID SCREEN IN ACCORDANCE WITH THEIR RANGE POSITION FROM SAID RECEIVER; AN INTEGRATOR COUPLED TO SAID RECEIVER AT THE OUTPUT OF SAID WIDEBAND AMPLIFIER AND THE INPUT OF SAID CONSTANT FALSE ALARM LIMITING CIRCUIT TO PRODUCE A VOLTAGE ON ITS OUTPUT AVERAGING THE RECEIVED RADIO AND NOISE JAMMING FREQUENCIES; A BURN-THROUGH RANGE COMPUTER COUPLED TO THE OUTPUT OF SAID INTEGRATOR AND HAVING AN ADJUSTABLE VOLTAGE INPUT REPRESENTATIVE OF TARGET SIZE, SAID COMPUTER PRODUCING A VOLTAGE REPRESENTATIVE OF THE BURN-THROUGH RANGE ON AN OUTPUT THEREOF; AND AN INTENSITY GATING MEANS COUPLED TO THE OUTPUT OF SAID RANGE COMPUTER AND TO THE SWEEP GENERATOR TO GATE THE BURNTHROUGH RANGE VOLTAGE ON AN OUTPUT THEREOF PROPORTIONAL TO NOISE JAMMING FREQUENCY WITH RESPECT TO ADJUSTED VOLTAGE REPRESENTATIVE OF TARGET SIZE, SAID INTENSITY GATING MEANS OUTPUT BEING COUPLED TO THE OTHER BEAM INTENSITY CONTROLLING ELECTRODE OF SAID CATHODE RAY DISPLAY TUBE TO LIGHT INTENSITY WITH SAID BURNTHROUGH RANGE VOLTAGE THE RANGE AREAS ON SAID TUBE SCREEN BEING JAMMED WHEREBY OPERATORS OF THE RADAR MAY CONTROL THE DISPLAY OF TARGET INFORMATION AS A FUNCTION OF ANTICIPATED TARGET SIZE TO ELIMINATE FALSE TARGET DISPLAY.
Inventors
- 👤 Thomas P Foley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 12:53
CPC Classifications
G; G01; G01S; G01S7/00; G01S7/02; G01S7/04; G01S7/06; G01S7/10; G01S7/12; G01S7/36
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
178 words
A means of displaying the range detection capability of a search radar in a noisy environment comprising: a radar receiver for receiving echo radio frequency signals reflected from targets and subject to jamming signals; a cathode ray display tube coupled to said receiver for displaying target echoes received by said receiver, said tube having circuits to produce sweep voltages therefor; a burn-through range computer coupled to said receiver to produce an analog voltage of the burn-through range from all energy received with respect to an expected target size on an output thereof; and an intensity gating means coupled to the output of said computer and to the sweep voltage circuits to gate the burnthrough range voltage on an output thereof proportional to the degree of target jamming, said intensity gating means output being coupled to said cathode ray tube to intensify the areas of target jamming with said burnthrough range voltage whereby the intensified areas on said cathode ray tube display indicate the jammed areas in range through which only targets of predetermined area will burn-through for display.
Claim 2
Dependent Claim
178 words
A means of displaying the range detection capability of a search radar in a noisy environment comprising: a radar receiver for receiving echo radio frequency signals reflected from targets and subject to jamming signals; a cathode ray display tube coupled to said receiver for displaying target echoes received by said receiver, said tube having circuits to produce sweep voltages therefor; a burn-through range computer coupled to said receiver to produce an analog voltage of the burn-through range from all energy received with respect to an expected target size on an output thereof; and an intensity gating means coupled to the output of said computer and to the sweep voltage circuits to gate the burnthrough range voltage on an output thereof proportional to the degree of target jamming, said intensity gating means output being coupled to said cathode ray tube to intensify the areas of target jamming with said burnthrough range voltage whereby the intensified areas on said cathode ray tube display indicate the jammed areas in range through which only targets of predetermined area will burn-through for display.
Claim 3
Dependent Claim
254 words
A means of displaying the range detection capability of a search radar in a noisy environment comprising: a radar receiver for receiving echo radio frequency signals reflected from targets and subject to jamming signals; a cathode ray display tube circuit having a sweep generator and deflection circuit to produce cathode ray tube beam traces and having two beam intensity control electrodes, said sweep generator and one of said beam intensity electrodes being coupled to said receiver to trigger said sweep generator in synchronism with said receiver and to intensify said beam at range locations on the cathode ray tube face proportional to the range of targets reflecting the echo signals; a burn-through range computer coupled to said receiver to receive said radio frequency signal energy and having an adjustable factor as an input representative of target size, said computer producing a voltage representative of the burn-through range on an output thereof; and an intensity gating means coupled to the output of said computer and to the sweep generator to gate the burnthrough range voltage on an output thereof proportional to the signal energy received with respect to the expected target on an output thereof, said intensity gating means output being coupled to the other beam intensity control electrode of said cathode ray tube to light intensify with said burnthrough range voltage the areas being jammed whereby burn-through range areas are displayed and any targets appearing in these areas will be of a size greater than the target size factor adjusted into said burn-through computer.
Claim 4
Dependent Claim
254 words
A means of displaying the range detection capability of a search radar in a noisy environment comprising: a radar receiver for receiving echo radio frequency signals reflected from targets and subject to jamming signals; a cathode ray display tube circuit having a sweep generator and deflection circuit to produce cathode ray tube beam traces and having two beam intensity control electrodes, said sweep generator and one of said beam intensity electrodes being coupled to said receiver to trigger said sweep generator in synchronism with said receiver and to intensify said beam at range locations on the cathode ray tube face proportional to the range of targets reflecting the echo signals; a burn-through range computer coupled to said receiver to receive said radio frequency signal energy and having an adjustable factor as an input representative of target size, said computer producing a voltage representative of the burn-through range on an output thereof; and an intensity gating means coupled to the output of said computer and to the sweep generator to gate the burnthrough range voltage on an output thereof proportional to the signal energy received with respect to the expected target on an output thereof, said intensity gating means output being coupled to the other beam intensity control electrode of said cathode ray tube to light intensify with said burnthrough range voltage the areas being jammed whereby burn-through range areas are displayed and any targets appearing in these areas will be of a size greater than the target size factor adjusted into said burn-through computer.
Claim 5
Dependent Claim
52 words
A means of displaying the range detection capability of a search radar in a noisy environment as set forth in claim 2 wherein said burn-through range computer is coupled to said receiver through an integrating means for averaging the received echo signals whereby the received averaged energy is applied to said computer.
Claim 6
Dependent Claim
65 words
A means of displaying the range detection capability of A search radar in a noisy environment as set forth in claim 3 wherein said receiver includes a wide band amplifier and a constant false alarm circuit coupled in series and said integrating means and burn-through computer are coupled in said receiver at a point between said wide band amplifier and said constant false alarm circuit.
Claim 7
Dependent Claim
317 words
A means of displaying the range detection capability of a search radar in a noisy environment comprising: a constant false alarm radar receiver for receiving echo radio frequency signals reflected from targets and subject to broadband noise jamming, said receiver having a wideband amplifier of radio frequency and a constant false alarm limiting circuit therein; a cathode ray display tube circuit including a sweep generator and a deflection circuit for producing cathode ray tube beam traces on the tube screen, and including two beam intensity controlling electrodes, said sweep generator being coupled to the synchronizing circuits of said receiver to synchronize the generation of sweep voltages for said deflection circuits and one of said intensity controlling electrodes being coupled to the video output of said receiver to paint targets on said screen in accordance with their range position from said receiver; an integrator coupled to said receiver at the output of said wideband amplifier and the input of said constant false alarm limiting circuit to produce a voltage on its output averaging the received radio and noise jamming frequencies; a burn-through range computer coupled to the output of said integrator and having an adjustable voltage input representative of target size, said computer producing a voltage representative of the burn-through range on an output thereof; and an intensity gating means coupled to the output of said range computer and to the sweep generator to gate the burnthrough range voltage on an output thereof proportional to noise jamming frequency with respect to adjusted voltage representative of target size, said intensity gating means output being coupled to the other beam intensity controlling electrode of said cathode ray display tube to light intensify with said burnthrough range voltage the range areas on said tube screen being jammed whereby operators of the radar may control the display of target information as a function of anticipated target size to eliminate false target display.
Claim 8
Dependent Claim
317 words
A means of displaying the range detection capability of a search radar in a noisy environment comprising: a constant false alarm radar receiver for receiving echo radio frequency signals reflected from targets and subject to broadband noise jamming, said receiver having a wideband amplifier of radio frequency and a constant false alarm limiting circuit therein; a cathode ray display tube circuit including a sweep generator and a deflection circuit for producing cathode ray tube beam traces on the tube screen, and including two beam intensity controlling electrodes, said sweep generator being coupled to the synchronizing circuits of said receiver to synchronize the generation of sweep voltages for said deflection circuits and one of said intensity controlling electrodes being coupled to the video output of said receiver to paint targets on said screen in accordance with their range position from said receiver; an integrator coupled to said receiver at the output of said wideband amplifier and the input of said constant false alarm limiting circuit to produce a voltage on its output averaging the received radio and noise jamming frequencies; a burn-through range computer coupled to the output of said integrator and having an adjustable voltage input representative of target size, said computer producing a voltage representative of the burn-through range on an output thereof; and an intensity gating means coupled to the output of said range computer and to the sweep generator to gate the burnthrough range voltage on an output thereof proportional to noise jamming frequency with respect to adjusted voltage representative of target size, said intensity gating means output being coupled to the other beam intensity controlling electrode of said cathode ray display tube to light intensify with said burnthrough range voltage the range areas on said tube screen being jammed whereby operators of the radar may control the display of target information as a function of anticipated target size to eliminate false target display.
Claim 9
Dependent Claim
50 words
A means of displaying the range detection capability of a search radar in a noisy environment as set forth in claim 5 wherein said video output of said receiver coupled to said one intensity controlling electrode of said cathode ray display tube is through a video amplifier in said coupling.
Claim 10
Dependent Claim
46 words
A means of displaying the range detection capability of a search radar in a noisy environment as set forth in claim 6 wherein said cathode ray display tube circuit including said sweep generator and deflection circuit are constructed and arranged to provide plan-position-indication on said screen.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-07-25 | 1976-01-24 | 1976-07-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-07-25 | 1980-01-24 | 1980-07-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-07-25 | 1984-01-24 | 1984-07-25 | $7700.00 | Window Closed / Lapsed |