US3680109A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Phased array
Assignee: Raytheon Co
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Filing: 1970-08-20
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Granted: 1972-07-25
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Expires: 1990-08-20
Abstract
Abstract A corporate feed phased array for radio frequency energy, such array being adapted to frequency angle phase shifter scanning. The electrical length of each transmission line leading to each radiating element is randomly selected to permit the digital phase shifter associated with each radiating element to be randomly actuated to produce a collimated and deflected beam.
Inventors
- 👤 Fritz Steudel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 23:26
CPC Classifications
H; H01; H01Q; H01Q3/00; H01Q3/26; H01Q3/2682; H01Q3/2694; H01Q3/30; H01Q3/34; H01Q3/36; H01Q3/38; H01Q3/385
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
159 words
In a phased array for transmitting a collimated beam of electromagnetic energy from a source thereof, the combination comprising: a. a plurality of array elements, each one of such elements including: i. an antenna element; ii. a digital phase shifter; and, iii. a transmission line for coupling electromagnetic energy from the antenna element to the digital phase shifter, the electrical length of each such line differing randomly from the length of each other such line within the limit of a wavelength of the electromagnetic energy in such line; b. a source of electromagnetic energy; c. means for connecting each digital phase shifter to the source of electromagnetic energy; and, d. shifter actuating means, cooperating with each digital phase shifter, for setting each such phase shifter to shift the phase of the electromagnetic energy passing through each such phase shifter as required to produce a systematic relationship in the phase of electromagnetic energy from each one of the antenna elements.
Claim 2
Dependent Claim
159 words
In a phased array for transmitting a collimated beam of electromagnetic energy from a source thereof, the combination comprising: a. a plurality of array elements, each one of such elements including: i. an antenna element; ii. a digital phase shifter; and, iii. a transmission line for coupling electromagnetic energy from the antenna element to the digital phase shifter, the electrical length of each such line differing randomly from the length of each other such line within the limit of a wavelength of the electromagnetic energy in such line; b. a source of electromagnetic energy; c. means for connecting each digital phase shifter to the source of electromagnetic energy; and, d. shifter actuating means, cooperating with each digital phase shifter, for setting each such phase shifter to shift the phase of the electromagnetic energy passing through each such phase shifter as required to produce a systematic relationship in the phase of electromagnetic energy from each one of the antenna elements.
Claim 3
Dependent Claim
97 words
In a phased array as in claim 1 the combination wherein the shifter actuating means includes a digital memory for producing digital numbers to set the digital phase shifters, the particular digital number applied to each digital phase shifter being the number required to result in a phase shift, within the limit of the phase shift due to the least significant bit of each digital phase shifter, which, when added to the phase shift caused by the associated transmission line, produces a systematic relationship in the phase of electromagnetic energy from each one of the antenna elements.
Claim 4
Dependent Claim
29 words
In a phased array as in claim 2, the combination wherein the means for connecting each digital phase shifter to the source of electromagnetic energy is a corporate feed.
References Cited (Backward Citations)
US3500412A
Cited
US3611401A
Cited
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 |