US3657693A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Multiple beam scanned planar array
Assignee: Control Data Corp
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Filing: 1965-11-15
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Granted: 1972-04-18
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Expires: 1985-11-15
Abstract
Abstract Apparatus for determining the direction of arrival of an incoming wave front comprises a planar array of transducer elements arranged in N rows and N columns. The transducers are scanned serially in each row, and row by row, by a sequential sampler the output voltage of which comprises the sampled transducer voltages. A frequency spectrum analyzer such as a swept analyzer or bank of filters determines the frequency components of the sampler output which are related in a particular way to the angle of arrival of the incoming wave front.
Inventors
- 👤 Walton Graham
- 👤 Sheldon Gardner
- 👤 John Cabot
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 22:17
CPC Classifications
G; G01; G01S; G01S3/00; G01S3/02; G01S3/14; G01S3/80; G01S3/802; G01S3/803; G01S3/8032
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
216 words
Apparatus for detecting the arrival of a wave front from a given direction, comprising an array of transducer elements responsive to said wave, said array consisting of M rows of N transducer elements, a first sequential sampler coupled to each of said transducer elements for sampling the voltage on each of said elements in a preselected sequence, a second sequential sampler, phase shifting means connected between each of said transducer elements and said second sequential sampler, driving means for causing said first and second sequential samplers to sample the voltages on the same transducers at the same time, means for delaying the output of said second sampler a fixed amount with respect to the output of said first sampler, means for advancing the output of said second sampler a fixed amount in phase with respect to the output of said first sampler, first combining means for combining the relatively delayed output of said second sampler with the output of said first sampler, second combining means for combining the relatively advanced output of said second sampler with said first sampler, and frequency responsive means coupled to said first and second combining means for determining the frequency components of the outputs of said combining means to thereby determine the angles of elevation and azimuth of said wave front.
Claim 2
Dependent Claim
216 words
Apparatus for detecting the arrival of a wave front from a given direction, comprising an array of transducer elements responsive to said wave, said array consisting of M rows of N transducer elements, a first sequential sampler coupled to each of said transducer elements for sampling the voltage on each of said elements in a preselected sequence, a second sequential sampler, phase shifting means connected between each of said transducer elements and said second sequential sampler, driving means for causing said first and second sequential samplers to sample the voltages on the same transducers at the same time, means for delaying the output of said second sampler a fixed amount with respect to the output of said first sampler, means for advancing the output of said second sampler a fixed amount in phase with respect to the output of said first sampler, first combining means for combining the relatively delayed output of said second sampler with the output of said first sampler, second combining means for combining the relatively advanced output of said second sampler with said first sampler, and frequency responsive means coupled to said first and second combining means for determining the frequency components of the outputs of said combining means to thereby determine the angles of elevation and azimuth of said wave front.
Claim 3
Dependent Claim
13 words
Apparatus according to claim 1, wherein said frequency responsive means comprises swept analyzers.
Claim 4
Dependent Claim
66 words
Multi-beam energy translating apparatus, comprising M rows of N transducer elements, sequential sampler means for sequentially coupling each of the transducers in a preselected sequence to an output line, and means for analyzing the frequency spectrum of the voltage appearing on said output line to provide an indication of both the angle of elevation and the angle of azimuth of a wave translated by said apparatus.
Claim 5
Dependent Claim
66 words
Multi-beam energy translating apparatus, comprising M rows of N transducer elements, sequential sampler means for sequentially coupling each of the transducers in a preselected sequence to an output line, and means for analyzing the frequency spectrum of the voltage appearing on said output line to provide an indication of both the angle of elevation and the angle of azimuth of a wave translated by said apparatus.
Claim 6
Dependent Claim
95 words
Multi-beam energy receiving apparatus, comprising M rows of N transducer elements, sampler means for sequentially cOupling the transducers in a preselected order to an output line, the transducers in each row being coupled to said output line in succession and after all of the transducers in the next adjacent row have been coupled to the output line, and means for analyzing the frequency spectrum of the voltage appearing on said output line to provide an indication of both the angle of elevation and the angle of azimuth of an incoming wave received by said apparatus.
Claim 7
Dependent Claim
95 words
Multi-beam energy receiving apparatus, comprising M rows of N transducer elements, sampler means for sequentially cOupling the transducers in a preselected order to an output line, the transducers in each row being coupled to said output line in succession and after all of the transducers in the next adjacent row have been coupled to the output line, and means for analyzing the frequency spectrum of the voltage appearing on said output line to provide an indication of both the angle of elevation and the angle of azimuth of an incoming wave received by said apparatus.
Claim 8
Dependent Claim
16 words
Apparatus according to claim 4, wherein said analyzing means comprises means for displaying said frequency spectrum.
Claim 9
Dependent Claim
37 words
Apparatus according to claim 5, wherein said analyzing means comprises a plurality of filters tuned to pass different frequencies, whereby said angles of elevation and azimuth are indicated by the magnitudes of the outputs of said filters.
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) | 1975-04-18 | 1975-10-18 | 1976-04-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-04-18 | 1979-10-18 | 1980-04-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-04-18 | 1983-10-18 | 1984-04-18 | $7700.00 | Window Closed / Lapsed |