US3885240A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Storage radar system
Assignee: United States Department of the Navy
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Filing: 1967-06-27
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Granted: 1975-05-20
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Expires: 1987-06-27
Abstract
Abstract A storage type phase-coherent pulse-doppler radar system wherein the r-f echo pulses are mixed with a coherent frequency (or frequencies) to produce video pulse signals whose amplitude envelope varies with the doppler information and wherein these video pulses are individually stored in a plurality of capacitors. The capacitors are arranged in rectangular matrices with one matrix for each range being investigated. Strobing circuits produce gating pulses to distribute samples of these pulses to their respective storage elements. The stored signals may then be read out at a predetermined rate and analyzed to determine the target''s range, range rate, and acceleration.
Inventors
- 👤 Garold K Jensen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 04:03
CPC Classifications
G; G01; G01S; G01S13/00; G01S13/02; G01S13/50; G01S13/58; G01S13/64
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
103 words
In a moving target detection apparatus, a system for storing a sequence of pulses whose amplitudes vary with the doppler information derived from the moving target, said system comprising: a plurality of stationary storage elements equal in number to the number of pulses to be stored, write-in means for sequentially gating in said sequence of pulses to be individually stored in said plurality of storage elements, said write-in means comprising a matrix of gating lines requiring simultaneous gating inputs on at least two of said lines to write into a given storage element, and read-out means for sequentially reading out said stored pulses.
Claim 2
Dependent Claim
103 words
In a moving target detection apparatus, a system for storing a sequence of pulses whose amplitudes vary with the doppler information derived from the moving target, said system comprising: a plurality of stationary storage elements equal in number to the number of pulses to be stored, write-in means for sequentially gating in said sequence of pulses to be individually stored in said plurality of storage elements, said write-in means comprising a matrix of gating lines requiring simultaneous gating inputs on at least two of said lines to write into a given storage element, and read-out means for sequentially reading out said stored pulses.
Claim 3
Dependent Claim
14 words
The system of claim 1, wherein each of said storage elements is a capacitor.
Claim 4
Dependent Claim
34 words
The system of claim 1, wherein said read-out means comprises: a matrix of gating lines requiring simultaneous gating inputs on at least two of said lines to read out of a given storage element.
Claim 5
Dependent Claim
25 words
The system of claim 1, wherein said means for reading-out comprises, means for reading-out said information at a speed independent of the speed of write-in.
Claim 6
Dependent Claim
107 words
In a pulse doppler radar apparatus in which a plurality of ranges are sampled by means of range gates, a system for storing a sequence of pulses whose amplitudes vary with the doppler information derived from the moving target, said system comprising: a predetermined number of groups of stationary storage elements equivalent to the number of range gates to be sampled, each of said groups composed of a plurality of said elements; write-in means for gating target information into a selected number of said elements of each group during each interpulse period; means for reading out the information stored in each of said groups separately and successively.
Claim 7
Dependent Claim
107 words
In a pulse doppler radar apparatus in which a plurality of ranges are sampled by means of range gates, a system for storing a sequence of pulses whose amplitudes vary with the doppler information derived from the moving target, said system comprising: a predetermined number of groups of stationary storage elements equivalent to the number of range gates to be sampled, each of said groups composed of a plurality of said elements; write-in means for gating target information into a selected number of said elements of each group during each interpulse period; means for reading out the information stored in each of said groups separately and successively.
Claim 8
Dependent Claim
17 words
The system of claim 5 further including means to analyze said readout signals to determine target velocity.
Claim 9
Dependent Claim
14 words
The system of claim 5, wherein each of said storage elements is a capacitor.
Claim 10
Dependent Claim
35 words
The system of claim 5 wherein said sampling means comprises: a matrix of gating lines requiring simultaneous gating inputs on at least two of said lines to store a sample in a given storage element.
Claim 11
Dependent Claim
36 words
The system of claim 5, wherein said read-out means comprises: a two dimensional matrix of gating lines requiring simultaneous gating inputs on at least two of said lines to read out of a given storage element.
Claim 12
Dependent Claim
25 words
The system of claim 5, wherein said means for reading-out comprises, means for reading-out said information at a speed independent of the speed of write-in.
Claim 13
Dependent Claim
143 words
A phase-coherent pulse-doppler radar system comprising: means to transmit a coherent, pulse r-f signal; means to receive a doppler shifted pulse echo of said originally transmitted pulse signal; means to mix said echo signal with an unshifted local signal to produce video pulse signals whose amplitudes vary with the doppler frequency; a plurality of stationary storage elements equal in number to the Number of said video pulses to be stored and interconnected to form a preselected number of groups equal in number to the number of ranges to be sampled; write-in means for gating information into a selected number of said elements of each of said groups during each interpulse period; read-out means for gating out information stored in each of said groups separately and successively; and means to analyze said read-out pulses to determine radial velocity and acceleration of a target detected.
Claim 14
Dependent Claim
143 words
A phase-coherent pulse-doppler radar system comprising: means to transmit a coherent, pulse r-f signal; means to receive a doppler shifted pulse echo of said originally transmitted pulse signal; means to mix said echo signal with an unshifted local signal to produce video pulse signals whose amplitudes vary with the doppler frequency; a plurality of stationary storage elements equal in number to the Number of said video pulses to be stored and interconnected to form a preselected number of groups equal in number to the number of ranges to be sampled; write-in means for gating information into a selected number of said elements of each of said groups during each interpulse period; read-out means for gating out information stored in each of said groups separately and successively; and means to analyze said read-out pulses to determine radial velocity and acceleration of a target detected.
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) | 1978-05-19 | 1978-11-18 | 1979-05-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-05-19 | 1982-11-18 | 1983-05-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-05-19 | 1986-11-18 | 1987-05-20 | $7700.00 | Window Closed / Lapsed |