US3586871A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Phase responsive switching system
Assignee: AT&T Inc
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Filing: 1969-05-23
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Granted: 1971-06-22
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Expires: 1989-05-23
Abstract
Abstract The power derived from N identical power amplifiers are combined in any one of N different output ports by controlling the relative phases of the signals propagating along N different transmission lines energized, respectively, by the N amplifiers. In particular, the N output ports are longitudinally distributed along said lines, and are coupled thereto through networks that are responsive to a different mode of excitation, where each mode is a different arrangement of input signal phases. It is an advantage of such a system that all the switching is done in the amplfiiers'' relatively low-power input circuits rather than in the high-power output circuits.
Inventors
- 👤 Harold Seidel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 22:35
CPC Classifications
H; H01; H01P; H01P1/00; H01P1/20; H01P1/213
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
78 words
A swItching system for coupling power to any one of N output ports comprising: N transmission lines; means for energizing said lines in any one of N different phase modes; output networks longitudinally disposed along said lines for summing the signals in said lines and coupling said signals to different output circuits; and mode converters disposed between adjacent pairs of output networks for converting the signals propagating along said lines from one to another of said phase modes.
Claim 2
Dependent Claim
78 words
A swItching system for coupling power to any one of N output ports comprising: N transmission lines; means for energizing said lines in any one of N different phase modes; output networks longitudinally disposed along said lines for summing the signals in said lines and coupling said signals to different output circuits; and mode converters disposed between adjacent pairs of output networks for converting the signals propagating along said lines from one to another of said phase modes.
Claim 3
Dependent Claim
37 words
The switch according to claim 1 wherein said energizing means comprises: a common signal source; a plurality of N power amplifiers; and means, including adjustable phase shifters, for coupling said common source to each of said amplifiers.
Claim 4
Dependent Claim
47 words
The switch according to claim 2 wherein the relative phases of the signals coupled to said amplifiers are given by where n assumes all integral values between zero and (N-1), inclusively; and m assumes all integral values between zero and N-1, inclusively, for each value of n.
Claim 5
Dependent Claim
106 words
The switch according to claim 2 where each phase shifter comprises: a plurality of N delay networks connected in parallel by means of quarter-wave line segments; each of said networks producing a different relative phase shift given by where m assumes a different integral value between 1 and N, inclusive; means for coupling said common signal source to one end of said parallel connected networks; means for coupling the other end of said parallel connected networks to one of said amplifiers; a diode connected in shunt at each end of each of said networks; and means for switching said diodes between their high- and low-conductivity states.
Claim 6
Dependent Claim
38 words
The switch according to claim 1 wherein said mode converters comprises a group of phase shifters located along said transmission lines; and wherein the relative phase shifts produced by said phase shifters differ by multiples of 360/N degrees.
Claim 7
Dependent Claim
88 words
The switch according to claim 1 wherein each network comprises a first and a second cluster of transmission line stubs spaced an odd number of quarter-wavelengths apart along said lines; each of said clusters including a plurality of N quarter-wave stubs, each one of which is connected at one end to a different one of said lines and at the other end to a common junction; the common junction of the first of said clusters along the direction of wave propagation being the output port for said network.
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) | 1974-06-21 | 1974-12-21 | 1975-06-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-06-21 | 1978-12-21 | 1979-06-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-06-21 | 1982-12-21 | 1983-06-22 | $7700.00 | Window Closed / Lapsed |