US3905009A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Transducer array scanning system
Assignee: United States Department of the Navy
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Filing: 1974-09-20
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Granted: 1975-09-09
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Expires: 1994-09-20
Abstract
Abstract A scanning system for use in a torpedo homing device having a planar transducer array that produces steerable sum or difference beam patterns of desired shape which are continuously scanned across the aperture of the array by a single control signal indicative of a predetermined beam direction. Outputs from individual transducer elements within the array are amplitude shaded by respective amplifiers to incorporate beam direction control. A first summing network adds amplitude shaded signals indicative of a phase symmetric beam pattern and a second summing network adds amplitude shaded signals indicative of a phase antisymmetric beam pattern. Phase shifters are connected to receive output signals from each of the respective summing networks to remove the quadrature phase difference between the summed output signals. A third summing network adds the outputs from each of the phase shifters to form a beam pattern steered in the predetermined direction.
Inventors
- 👤 William J Hughes
- 👤 Jr William Thompson
- 👤 Richard D Ingram
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 10:06
CPC Classifications
F; F41; F41G; F41G7/00; F41G7/20; F41G7/22; F41G7/2273; F41G7/228; G; G01; G01S; G01S3/00; G01S3/80; G01S3/802; G01S3/803; G01S3/8034; Y; Y10; Y10S; Y10S367/00; Y10S367/905
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
252 words
A scanning system for directionally steering the beam pattern of an array of receivers, comprising: first amplifying means adapted to receive output signals fron respective ones of the receivers for providing a plurality of weighted amplified output signals relative to each other; signal generating means adapted to receive a control signal indicative of the steering angle for generating a plurality of output signals each indicative of a discrete sine and cosine function of the steering angle; second amplifying means connected to receive said signal generating means output signals and said first amplifying means output signals for providing a plurality of weighted output signals each indicative of the product of selected ones of said first amplifying output signals and saId signal generating means output signals respectively; first summing means connected to receive the cosine-weighted second amplifying means output signals for providing an output signal indicative of the sum thereof; second summing means connected to receive the sine-weighted second amplifying means output signals for providing an output signal indicative of the sum thereof; phase shifting means connected to receive said first and second summing means output signals for providing first and second output signals indicative of said first input signal phase shifted in one direction and a second output signal indicative of said second input signal phase shifted in an opposite direction; and third summing means connected to receive said phase shifting means first and second output signals for providing an output signal indicative of the element array output signals at the steering angle.
Claim 2
Dependent Claim
252 words
A scanning system for directionally steering the beam pattern of an array of receivers, comprising: first amplifying means adapted to receive output signals fron respective ones of the receivers for providing a plurality of weighted amplified output signals relative to each other; signal generating means adapted to receive a control signal indicative of the steering angle for generating a plurality of output signals each indicative of a discrete sine and cosine function of the steering angle; second amplifying means connected to receive said signal generating means output signals and said first amplifying means output signals for providing a plurality of weighted output signals each indicative of the product of selected ones of said first amplifying output signals and saId signal generating means output signals respectively; first summing means connected to receive the cosine-weighted second amplifying means output signals for providing an output signal indicative of the sum thereof; second summing means connected to receive the sine-weighted second amplifying means output signals for providing an output signal indicative of the sum thereof; phase shifting means connected to receive said first and second summing means output signals for providing first and second output signals indicative of said first input signal phase shifted in one direction and a second output signal indicative of said second input signal phase shifted in an opposite direction; and third summing means connected to receive said phase shifting means first and second output signals for providing an output signal indicative of the element array output signals at the steering angle.
Claim 3
Dependent Claim
22 words
A scanning system according to claim 1 wherein said first amplifying means further comprises a plurality of amplifiers having predetermined gain coefficients.
Claim 4
Dependent Claim
17 words
A scanning system according to claim 2 wherein said signal generating means is a trigonometric function generator.
Claim 5
Dependent Claim
17 words
A scanning system according to claim 3 wherein said trigonometric function generator is a read only memory.
Claim 6
Dependent Claim
28 words
A scanning system according to claim 3 wherein said second amplifying means further comprises a plurality of amplifiers which is twice that of the number of transducer elements.
Claim 7
Dependent Claim
55 words
A scanning system according to claim 5 wherein said amplifiers of said second amplifying means are arranged in pairs to be commonly connected to receive the selected ones of said first amplifying output signals and individually connected to receive selected ones of the sine and cosine function output signals. respectively, from said signal generating means.
Claim 8
Dependent Claim
17 words
A scanning system according to claim 6 wherein said first and second summing means are summing amplifiers.
Claim 9
Dependent Claim
24 words
A scanning system according to claim 7 wherein the phase difference between the output signals of said first and second summing networks is 90*.
Claim 10
Dependent Claim
19 words
A scanning system according to claim 8 wherein the output signals of said phase shifting means are in phase.
Claim 11
Dependent Claim
26 words
A scanning system according to claim 9 wherein the first and second output signals of said phase shifting means are phase shifted +45* and -45*, respectively.
Claim 12
Dependent Claim
16 words
A scanning system according to claim 9 wherein said third summing network is a summing amplifier.
References Cited (Backward Citations)
US3670335A
Cited
US3701156A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-09-08 | 1979-03-10 | 1979-09-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-09-08 | 1983-03-10 | 1983-09-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-09-08 | 1987-03-10 | 1987-09-09 | $7700.00 | Window Closed / Lapsed |