Patent US3605040A successfully refreshed from Google Patents.
US3605040A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Y-junction circulator with common arm capacitor
Assignee: AT&T Inc
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Filing: 1969-11-03
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Granted: 1971-09-14
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Expires: 1989-11-03
Abstract
Abstract A Y-junction strip line circulator of the lumped constant type in which a single, common capacitor tunes symmetrically with the inductance of all three circulator arms. The capacitor may be fixed or may be electrically or mechanically variable to tune, adjust or switch the circulator.
Inventors
- 👤 Reinhard H Knerr
- 👤 Daniel J Thibault
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 22:41
CPC Classifications
H; H01; H01P; H01P1/00; H01P1/32; H01P1/38; H01P1/383; H01P1/387
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
135 words
A circulator for operation in a given band of high frequency electromagnetic wave energy comprising a core of magnetically biased gyromagnetic material, at least one ground plane, a plurality of conductive strips intermeshing at 120* to each other across said core and forming parts of three strip transmission lines which exhibit inductive reactance when one end is excited by high frequency wave energy relative to said ground plane, the other ends of said strips being interconnected at an intermediate point separated in space and potential from said excited ends and from said ground plane and from the intermeshing portions of said strips, and means for introducing capacitance between said point of interconnection and said ground plane of such value to interact with the inductive reactance of the strips to produce circulation within said given band.
Claim 2
Dependent Claim
135 words
A circulator for operation in a given band of high frequency electromagnetic wave energy comprising a core of magnetically biased gyromagnetic material, at least one ground plane, a plurality of conductive strips intermeshing at 120* to each other across said core and forming parts of three strip transmission lines which exhibit inductive reactance when one end is excited by high frequency wave energy relative to said ground plane, the other ends of said strips being interconnected at an intermediate point separated in space and potential from said excited ends and from said ground plane and from the intermeshing portions of said strips, and means for introducing capacitance between said point of interconnection and said ground plane of such value to interact with the inductive reactance of the strips to produce circulation within said given band.
Claim 3
Dependent Claim
14 words
The circulator according to claim 1 wherein said means for introducing capacitance is variable.
Claim 4
Dependent Claim
15 words
The circulator according to claim 2 wherein said means for introducing capacitance includes a varactor.
Claim 5
Dependent Claim
110 words
A circular comprising a core of magnetically biased gyromagnetic material, a ground plane, a plurality of conductive members adapted to form parts of three transmission lines by having one end of each adapted to be excited by high frequency wave energy relative to said ground plane, said conductive members crossing over each other and having the other end of each interconnected at a point having a potential separated from said ground plane, said conductive members being further inductively coupled to each other by said core in the region of their crossing between said ends, and means for introducing a lumped capacitance between said point of interconnection and said ground plane.
Claim 6
Dependent Claim
110 words
A circular comprising a core of magnetically biased gyromagnetic material, a ground plane, a plurality of conductive members adapted to form parts of three transmission lines by having one end of each adapted to be excited by high frequency wave energy relative to said ground plane, said conductive members crossing over each other and having the other end of each interconnected at a point having a potential separated from said ground plane, said conductive members being further inductively coupled to each other by said core in the region of their crossing between said ends, and means for introducing a lumped capacitance between said point of interconnection and said ground plane.
Claim 7
Dependent Claim
54 words
The circulator according to claim 4 wherein said means for introducing capacitance includes means for abruptly changing the value of said capacitance between two discrete values, one of said values being selected to produce circulation between said lines in one sequence and the other to produce circulation between said lines in a reverse sequence.
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) | 1974-09-13 | 1975-03-15 | 1975-09-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-09-13 | 1979-03-15 | 1979-09-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-09-13 | 1983-03-15 | 1983-09-14 | $7700.00 | Window Closed / Lapsed |