US3676803A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electronically tunable matching circuit for circulators
Assignee: Comsat Corp
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Filing: 1970-05-01
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Granted: 1972-07-11
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Expires: 1990-05-01
Abstract
Abstract A novel matching circuit for a circulator of the type requiring a resistance and capacitance for tuning and matching the circulator. The matching circuit includes an electronically variable resistance and capacitance means for enabling optimum performance of the circulator over the range of its operating frequencies.
Inventors
- 👤 William J Simmons
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 19:05
CPC Classifications
H; H03; H03H; H03H7/00; H03H7/38; H03H7/40; H01; H01P; H01P1/00; H01P1/32; H01P1/38
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
124 words
An electronically tunable isolator comprising a ferrite circulator having more than two ports, and a first matching circuit connected to at least one port, said matching circuit comprising a varactor diode, a pin diode, first and second choke coils, first variable biasing means connected to said varactor diode through said first choke coil, second variable biasing means connected to said pin diode through said second choke coil, and means including coupling capacitors for connecting said varactor diode and said PIN diode to said one port, said isolator further comprising additional matching circuits each including a varactor diode and a PIN diode connected respectively to the remaining ports of said isolator, said additional matching circuits being tuned to give maximum power flow through said ports.
Claim 2
Dependent Claim
124 words
An electronically tunable isolator comprising a ferrite circulator having more than two ports, and a first matching circuit connected to at least one port, said matching circuit comprising a varactor diode, a pin diode, first and second choke coils, first variable biasing means connected to said varactor diode through said first choke coil, second variable biasing means connected to said pin diode through said second choke coil, and means including coupling capacitors for connecting said varactor diode and said PIN diode to said one port, said isolator further comprising additional matching circuits each including a varactor diode and a PIN diode connected respectively to the remaining ports of said isolator, said additional matching circuits being tuned to give maximum power flow through said ports.
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) | 1975-07-11 | 1976-01-10 | 1976-07-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-07-11 | 1980-01-10 | 1980-07-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-07-11 | 1984-01-10 | 1984-07-11 | $7700.00 | Window Closed / Lapsed |