US3748600A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Power combining network
Assignee: AT&T Inc
•
Filing: 1972-04-28
•
Granted: 1973-07-24
•
Expires: 1992-04-28
Abstract
Abstract If first and second noncoherent signals are combined in any simple hybrid network for application, for example, to a common antenna, each signal suffers a 3 dB loss. Furthermore, no simple phasing network suffices to obtain coherency if the signals are in nonoverlapping frequency bands. The present invention combines such signals by a network of hybrids and reflective reactive circuits that form third and fourth sum signals from the first and second. The resulting signals are now coherent and can be combined without loss. The reflective reactive circuit introduces a properly nonlinear phase characteristic that enhances the bandwidth over which the desired addition can be made.
Inventors
- 👤 J Smith
- 👤 R Fisher
- 👤 M County
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 13:37
CPC Classifications
H; H01; H01P; H01P5/00; H01P5/12; H01P5/16
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
130 words
In combination, first and second and third coupling networks each having a first port and a pair of coupled ports in coupling relationship to said first port and a further port in conjugate relationship to said first port, means for applying signals in different frequency bands respectively to the first port of said first and second networks, means for applying signals exiting one of the coupled ports of said first and second network respectively to a resonant circuit having the resonant frequency thereof midway between said bands, and means for coupling respectively reflections from each of said resonant circuits to the conjugate port of said first and second network, said third network having the coupled ports thereof respectively connected between the remaining coupled ports of said first and second network.
Claim 2
Dependent Claim
130 words
In combination, first and second and third coupling networks each having a first port and a pair of coupled ports in coupling relationship to said first port and a further port in conjugate relationship to said first port, means for applying signals in different frequency bands respectively to the first port of said first and second networks, means for applying signals exiting one of the coupled ports of said first and second network respectively to a resonant circuit having the resonant frequency thereof midway between said bands, and means for coupling respectively reflections from each of said resonant circuits to the conjugate port of said first and second network, said third network having the coupled ports thereof respectively connected between the remaining coupled ports of said first and second network.
Claim 3
Dependent Claim
52 words
The combination according to claim 1 wherein the coupling factors of said coupling networks and the phase shift introduced by said resonant circuits are proportioned so that signals in said bands combine in phase in the remaining coupled port of said third hybrid at two spaced frequencies within both of said bands.
Claim 4
Dependent Claim
75 words
The combination according to claim 1 wherein said first and second coupling networks have a coupling parameter Alpha and wherein said resonant circuits introduce a phase shift parameter phi to reflections therefrom, said parameters being proportioned so that (1 - Alpha 2/2 Alpha ) sin phi at two spaced frequencies within a first of said bands and (1 -Alpha 2/2 Alpha ) - sin phi at two spaced frequencies within the other of said bands.
Claim 5
Dependent Claim
141 words
In combination, first and second and third coupling networks each having a first port and a pair of coupled ports in coupling relationship to said first port and a further port in conjugate relationship to said first port, means for applying signals in different frequency bands respectively to the first port of said first and second networks, means connecting one of said coupled ports of each first and second network to said further conjugate port of the other, said connecting means including means for reflecting said signals from a resonant circuit having the resonant frequency thereof midway between said bands, said third network having the coupled ports thereof respectively connected between the remaining coupled ports of said first and second network, and means for receiving a signal combined from said different bands connected to the first port of said third network.
Claim 6
Dependent Claim
141 words
In combination, first and second and third coupling networks each having a first port and a pair of coupled ports in coupling relationship to said first port and a further port in conjugate relationship to said first port, means for applying signals in different frequency bands respectively to the first port of said first and second networks, means connecting one of said coupled ports of each first and second network to said further conjugate port of the other, said connecting means including means for reflecting said signals from a resonant circuit having the resonant frequency thereof midway between said bands, said third network having the coupled ports thereof respectively connected between the remaining coupled ports of said first and second network, and means for receiving a signal combined from said different bands connected to the first port of said third network.
Claim 7
Dependent Claim
134 words
In combination, first and second and third coupling networks each having a first port and a pair of coupled ports in coupling relationship to said first port and a further port in conjugate relationship to said first port, a pair of circulators each having first, second and third ports in successive coupling relationship in the order nAmed, each circulator having the first and third port thereof connecting one of said coupled ports of each first and second network to said further conjugate port of the other network, and resonant means terminating the second port of each circulator for reflecting signals coupled into said circulator second port back into said circulator second port, and said third network having the coupled ports thereof respectively connected between the remaining coupled ports of said first and second network.
Claim 8
Dependent Claim
134 words
In combination, first and second and third coupling networks each having a first port and a pair of coupled ports in coupling relationship to said first port and a further port in conjugate relationship to said first port, a pair of circulators each having first, second and third ports in successive coupling relationship in the order nAmed, each circulator having the first and third port thereof connecting one of said coupled ports of each first and second network to said further conjugate port of the other network, and resonant means terminating the second port of each circulator for reflecting signals coupled into said circulator second port back into said circulator second port, and said third network having the coupled ports thereof respectively connected between the remaining coupled ports of said first and second network.
References Cited (Backward Citations)
US3495263A
Cited
US3571765A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-07-23 | 1977-01-22 | 1977-07-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-07-23 | 1981-01-22 | 1981-07-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-07-23 | 1985-01-22 | 1985-07-24 | $7700.00 | Window Closed / Lapsed |