US3781704A
Expired / Lapsed
US
⏱️ 0.0 years remaining
High isolation circulator arrangement for low noise reflection type amplifiers
Assignee: Cutler Hammer Inc
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Filing: 1972-03-30
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Granted: 1973-12-25
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Expires: 1992-03-30
Abstract
Abstract A multi-junction cascade circulator includes an interjunction tuning device to enable operation of a reflection type amplifier with only one pass of input isolation, thereby minimizing degradation of signal to noise ratio due to input circuit losses while maintaining high isolation between the input and output of the amplifier independent of the load conditions.
Inventors
- 👤 Gruyl J De
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 20:29
CPC Classifications
H; H01; H01P; H01P1/00; H01P1/32; H01P1/38; H01P1/383; H01P1/387
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
75 words
A high isolation circulator arrangement for low noise singleport reflection type amplifiers, comprising: a. a three port circulator having the first port connected as an input port, the second as a reflection amplifier port, and the third as an output port, b. means including a non-reciprocal transmission device for coupling said output port to a signal load, and c. means for matching the impedance looking into said nonreciprocal device to that of said output port.
Claim 2
Dependent Claim
75 words
A high isolation circulator arrangement for low noise singleport reflection type amplifiers, comprising: a. a three port circulator having the first port connected as an input port, the second as a reflection amplifier port, and the third as an output port, b. means including a non-reciprocal transmission device for coupling said output port to a signal load, and c. means for matching the impedance looking into said nonreciprocal device to that of said output port.
Claim 3
Dependent Claim
70 words
The invention set forth in claim 1, wherein said non-reciprocal transmission device includes a second three-port circulator having an input port coupled to the output port of said first circulator, an output port adapted to be coupled to a singal load, and a terminated port coupled to a matching dissipative termination, and wherein said matching means comprises a tuning device coupled to the interjunction between said first and second circulators.
Claim 4
Dependent Claim
120 words
A high isolation circulator arrangement for low noise single-port reflection type amplifiers, comprising: a. a first three port circulator having the first port connected as a input port, the second port as a reflection amplifier port and the third port as an output port, b. a second three port circulator having an input port, a termination port and an output port, c. interjunction coupling means between the output port of said first circulator and the input port of said second circulator, and d. impedance transformer means coupled to said interjunction coupling Means for converting the impedance presented by the input port of said second circulator to an impedance that matches the output port of said first circulator for maximum isolation.
Claim 5
Dependent Claim
120 words
A high isolation circulator arrangement for low noise single-port reflection type amplifiers, comprising: a. a first three port circulator having the first port connected as a input port, the second port as a reflection amplifier port and the third port as an output port, b. a second three port circulator having an input port, a termination port and an output port, c. interjunction coupling means between the output port of said first circulator and the input port of said second circulator, and d. impedance transformer means coupled to said interjunction coupling Means for converting the impedance presented by the input port of said second circulator to an impedance that matches the output port of said first circulator for maximum isolation.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-12-24 | 1977-06-25 | 1977-12-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-12-24 | 1981-06-25 | 1981-12-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-12-24 | 1985-06-25 | 1985-12-25 | $7700.00 | Window Closed / Lapsed |