US3821740A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Super directive system
Assignee: Raytheon Co
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Filing: 1972-07-03
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Granted: 1974-06-28
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Expires: 1992-07-03
Abstract
Abstract A system of radiating elements arranged for forming one or more beams of radiation having radiation patterns such as a monopole, dipole, quadrupole, other multipoles or combination thereof. The individual radiating elements of the array are interconnected by circuitry providing for the summing and differencing of signals provided by adjacent radiating elements in response to incident radiation. In one embodiment the signal of one radiating element is delayed relative to the signal of an adjacent radiating element. The differencing of the signals provides for the deep nulls found in radiation patterns such as the dipole and quadrupole radiation patterns, while the delay between signals of adjacent radiating elements is adjusted for varying the shape of the directivity pattern. The system provides for varying the direction and shape of beams of the radiation pattern to provide for the detection, classification and/or tracking of a distant source of radiation as well as for illuminating a distant object. The system is responsive to the intensity of radiation received along one or more beams of the radiation pattern, and in response thereto, varies the delay between the signals of adjacent radiating elements and also provides for the selective coupling of specific radiating elements of the system.
Inventors
- 👤 S Ehrlich
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 15:29
CPC Classifications
G; G10; G10K; G10K11/00; G10K11/18; G10K11/26; G10K11/34; G10K11/341; G10K11/346
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
424 words
A radiating system comprising: a plurality of radiating elements; a first means for combining the signals of a first set of radiating elements of said plurality of radiating elements, said first combining means including means for delaying the signal of a radiating element of said first set of radiating elements relative to the signal of another radiating element of said first set of radiating elements; a second means for combining the signals of a second set of radiating elements of said plurality of radiating elements, said second combining means including means for delaying a signal of a radiating element of said second set of radiating elements relative to another radiating element of said second set of radiating elements, each of said delay means being a variable delay for delaying their corresponding signals a preselectable amount of delay; a third means for combining signals, said third means including means for delaying a signal provided by said second means relative to a signal provided by said first means, said third means combining said delayed signal of said second means with said combined signal of said first combining means; the radiating elements of said plurality of radiating elements being arranged in an array suitable for forming at least one beam of radiation, the directivity pattern of radiation of said array having a notch and being adjustable in accordance with the magnitude of the delays provided by said variable delay means; means for selectively coupling energy from individual ones of said radiating elements to said first and said second combining means, said selector means moving said notch for detecting a source of radiant energy; angle tracking means responsive to the energy of radiation received by said beam of said array, said angle tracking means being connected to each of said variable delay means and selecting the amount of delay to be provided by each of said variable delay means, said angle tracking means selecting and varying the directivity pattern of said beam of said array and providing a signal having information relative to the propagation direction of radiation when such radiation is received by said array of radiating elements, said angle tracking means operating said selector means to vary the position of said beam about a direction from which said energy is received; and wherein said angle tracking means comprises a memory for storing preselected values of delay for each of said variable delay means, and programming means for addressing said memory to select a set of delays to be provided by each of said variable delay means.
Claim 2
Dependent Claim
424 words
A radiating system comprising: a plurality of radiating elements; a first means for combining the signals of a first set of radiating elements of said plurality of radiating elements, said first combining means including means for delaying the signal of a radiating element of said first set of radiating elements relative to the signal of another radiating element of said first set of radiating elements; a second means for combining the signals of a second set of radiating elements of said plurality of radiating elements, said second combining means including means for delaying a signal of a radiating element of said second set of radiating elements relative to another radiating element of said second set of radiating elements, each of said delay means being a variable delay for delaying their corresponding signals a preselectable amount of delay; a third means for combining signals, said third means including means for delaying a signal provided by said second means relative to a signal provided by said first means, said third means combining said delayed signal of said second means with said combined signal of said first combining means; the radiating elements of said plurality of radiating elements being arranged in an array suitable for forming at least one beam of radiation, the directivity pattern of radiation of said array having a notch and being adjustable in accordance with the magnitude of the delays provided by said variable delay means; means for selectively coupling energy from individual ones of said radiating elements to said first and said second combining means, said selector means moving said notch for detecting a source of radiant energy; angle tracking means responsive to the energy of radiation received by said beam of said array, said angle tracking means being connected to each of said variable delay means and selecting the amount of delay to be provided by each of said variable delay means, said angle tracking means selecting and varying the directivity pattern of said beam of said array and providing a signal having information relative to the propagation direction of radiation when such radiation is received by said array of radiating elements, said angle tracking means operating said selector means to vary the position of said beam about a direction from which said energy is received; and wherein said angle tracking means comprises a memory for storing preselected values of delay for each of said variable delay means, and programming means for addressing said memory to select a set of delays to be provided by each of said variable delay means.
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) | 1977-06-27 | 1977-12-27 | 1978-06-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-06-27 | 1981-12-27 | 1982-06-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-06-27 | 1985-12-27 | 1986-06-28 | $7700.00 | Window Closed / Lapsed |