Patent US3860893A successfully refreshed from Google Patents.
US3860893A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Wide band active circuit three-port circulator for ultra-high frequencies and microwaves
Assignee: Lignes Telegraphiques et Telephoniques LTT SA
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Filing: 1974-01-02
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Granted: 1975-01-14
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Expires: 1994-01-02
Abstract
Abstract An active circuit one octave circulator made of three identical arms interconnected at the three-ports, each arm consisting of a gyrator comprising voltage and current single stage transistorized amplifiers, the impedance at each port being matched with the standard impedance of microwave circuits, and capacitive interconnecting means are provided at each end of the arms and between the two amplifiers. The circulators are designed as microwave integrated circuits.
Inventors
- 👤 Raymond Ropars
- 👤 Jean-Yves Herve
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 13:16
CPC Classifications
H; H03; H03H; H03H11/00; H03H11/02; H03H11/38
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
92 words
A wide band active circuit circulator made of three identical gyrators serially interconnected comprising each a current amplifier and a voltage amplifier serially connected and three ports respectively at the interconnections between two gyrators which comprises first capacitive coupling means between each port and the input of the connected gyrator, second capacitive coupling means between each port and the output of the connected gyrator, third capacitive coupling means between said current and voltage amplifiers of the same gyrator, and a single supply means for said amplifiers one output of which is earthed.
Claim 2
Dependent Claim
92 words
A wide band active circuit circulator made of three identical gyrators serially interconnected comprising each a current amplifier and a voltage amplifier serially connected and three ports respectively at the interconnections between two gyrators which comprises first capacitive coupling means between each port and the input of the connected gyrator, second capacitive coupling means between each port and the output of the connected gyrator, third capacitive coupling means between said current and voltage amplifiers of the same gyrator, and a single supply means for said amplifiers one output of which is earthed.
Claim 3
Dependent Claim
25 words
A wide band active circuit circulator according to claim 1 in which said first and second capacitive coupling means contain capacitors of the same value.
Claim 4
Dependent Claim
25 words
A wide band active circuit circulator according to claim 1 in which said first capacitive coupling means is serially connected with an impedance matching section.
Claim 5
Dependent Claim
22 words
A wide band active circuit circulator according to claim 3 in which said impedance matching section consists of a series capacitorinductor circuit.
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) | 1978-01-13 | 1978-07-15 | 1979-01-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-01-13 | 1982-07-15 | 1983-01-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-01-13 | 1986-07-15 | 1987-01-14 | $7700.00 | Window Closed / Lapsed |