Patent US4072956A successfully refreshed from Google Patents.
US4072956A
Expired / Lapsed
US
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Multifrequency array using common phasors
Assignee: United States Department of the Navy
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Filing: 1976-05-17
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Granted: 1978-02-07
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Expires: 1996-05-17
Abstract
Abstract A single antenna array having a phase shifter at the input of each antennalement and fed by a multifrequency input for simultaneously generating at least two beams. When the different excitation frequencies are simultaneously inputted into the phase shifters, a separate phase increment is introduced into each radiator for each frequency. The result is a separate beam output from each frequency input, the beams being generated simultaneously but at different beam pointing angles.
Inventors
- 👤 Joseph H. Provencher
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 10:36
CPC Classifications
H; H01; H01Q; H01Q25/00; H01Q3/00; H01Q3/26; H01Q3/30; H01Q3/34; H01Q3/36; H01Q3/38
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
137 words
A phased array antenna system comprising: first means including a plurality of frequency generators for simultaneously outputting a plurality of frequency signals, each said frequency signal being an approximate multiple of the one of said plurality of frequency signals having the lowest frequency; a plurality of phase shifters connected to the output of said first means, each of said phase shifters being operably coupled to each of said frequency generators and each of said phase shifters introducing a different phase increment in response to each of said plurality of frequency signals; a plurality of radiating elements each being operably coupled to one of said plurality of phase shifters; whereby in response to each of said frequency signals, said plurality of radiating elements simultaneously generates a plurality of beams, each said beam having a different beam pointing angle.
Claim 2
Dependent Claim
137 words
A phased array antenna system comprising: first means including a plurality of frequency generators for simultaneously outputting a plurality of frequency signals, each said frequency signal being an approximate multiple of the one of said plurality of frequency signals having the lowest frequency; a plurality of phase shifters connected to the output of said first means, each of said phase shifters being operably coupled to each of said frequency generators and each of said phase shifters introducing a different phase increment in response to each of said plurality of frequency signals; a plurality of radiating elements each being operably coupled to one of said plurality of phase shifters; whereby in response to each of said frequency signals, said plurality of radiating elements simultaneously generates a plurality of beams, each said beam having a different beam pointing angle.
Claim 3
Dependent Claim
24 words
The system of claim 1 wherein said radiating elements are spaced to permit scanning at the highest frequency of said plurality of frequency signals.
Claim 4
Dependent Claim
35 words
The system of claim 1 further including: switch means connected between said first means and said plurality of phase shifters for selectively changing the phase increment introduced by each of said plurality of phase shifters.
Claim 5
Dependent Claim
34 words
The system of claim 1 wherein predetermined ones of said plurality of radiating elements have filter means operably coupled thereto for inhibiting the transmission thereto of predetermined ones of said plurality of frequency signals.
Claim 6
Dependent Claim
15 words
The system of claim 1 wherein said plurality of frequency signals comprises two frequency signals.
Claim 7
Dependent Claim
33 words
The system of claim 5 wherein alternate ones of said plurality of radiating elements have filter means operably coupled thereto for inhibiting the transmission thereto of said frequency signal having the lowest frequency.
Claim 8
Independent Claim
142 words
A method of simultaneously generating at least two beams utilizing a single antenna array comprised of a plurality of radiating elements and a single phase shifter at the input to each said element comprising the steps of: (1) simultaneously generating at least two frequency signals which are approximate multiples of the lowest frequency signal of said at least two frequency signals; (2) simultaneously applying said at least two frequency signals to each said phase shifter at the input to each said element whereby each said phase shifter introduces a different phase shift in response to each said frequency signal and; (3) applying the outputs of each of said phase shifters to its respective radiating element whereby said plurality of radiating elements form a separate beam for each said at least two frequency signals, each said beam having a different beam pointing angle.
Claim 9
Independent Claim
142 words
A method of simultaneously generating at least two beams utilizing a single antenna array comprised of a plurality of radiating elements and a single phase shifter at the input to each said element comprising the steps of: (1) simultaneously generating at least two frequency signals which are approximate multiples of the lowest frequency signal of said at least two frequency signals; (2) simultaneously applying said at least two frequency signals to each said phase shifter at the input to each said element whereby each said phase shifter introduces a different phase shift in response to each said frequency signal and; (3) applying the outputs of each of said phase shifters to its respective radiating element whereby said plurality of radiating elements form a separate beam for each said at least two frequency signals, each said beam having a different beam pointing angle.
Claim 10
Dependent Claim
53 words
The method of claim 7 wherein said step of applying the outputs of each of said phase shifters to its respective radiating element includes the step of filtering predetermined ones of said at least two frequency signals from predetermined ones of said plurality of radiating elements for the purpose of suppressing grating lobes.
Claim 11
Dependent Claim
55 words
The method of claim 8 wherein the step of generating at least two frequency signals comprises generating two frequency signals and wherein the step of filtering predetermined ones of said at least two frequency signals comprises filtering the lower frequency signal of said two frequency signals from alternate ones of said plurality of radiating elements.
Claim 12
Dependent Claim
14 words
The system of claim 1 wherein said phase shifters are diode phase shifter circuits.
References Cited (Backward Citations)
US3518695A
Cited
US3771163A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-02-06 | 1981-08-08 | 1982-02-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-02-06 | 1985-08-08 | 1986-02-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-02-06 | 1989-08-08 | 1990-02-07 | $7700.00 | Window Closed / Lapsed |