Patent US3836874A successfully refreshed from Google Patents.
US3836874A
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Lumped element circulator
Assignee: Hitachi Ltd
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Filing: 1973-06-25
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Granted: 1974-09-17
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Expires: 1993-06-25
Abstract
Abstract In a lumped element circulator wherein three line conductors are arranged on the surface of a ferrimagnetic substrate with cross angles of 120* with respect to one another and in a manner to be insulated from one another, capacitive elements are connected between the input ends of the respective line conductors and an outer conductor. Terminating parts of the respective line conductors are connected to a conductor plate provided on the back of the ferrimagnetic substrate, and a DC magnetic field is applied perpendicularly to the plane of the ferrimagnetic substrate. The lumped element circulator comprises capacitors connected in series with the respective line conductors, and a coil connected between the conductor plate and the outer conductor.
Inventors
- 👤 M Maeda
- 👤 I Ikushima
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 10:18
CPC Classifications
H; H01; H01P; H01P1/00; H01P1/32; H01P1/38; H01P1/383; H01P1/387
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
132 words
In a lumped element circulator including: a ferrimagnetic substrate; three line conductors arranged on a surface of said substrate with cross angles defined at 120* with respect to one another and in a manner to be insulated from one another; a first capacitive element connected between an input end of said each line conductor and an outer conductor; and a conductor plate to which terminating ends of said respective line conductors are connected and which is provided on a back surface of said ferrimagnetic substrate; a DC magnetic field being applied perpendicularly to the plane of said ferrimagnetic substrate; the improvement comprising: a first reactance element connected in series with said input end of said each line conductor; and a second reactance element connected between said conductor plate and said outer conductor.
Claim 2
Dependent Claim
132 words
In a lumped element circulator including: a ferrimagnetic substrate; three line conductors arranged on a surface of said substrate with cross angles defined at 120* with respect to one another and in a manner to be insulated from one another; a first capacitive element connected between an input end of said each line conductor and an outer conductor; and a conductor plate to which terminating ends of said respective line conductors are connected and which is provided on a back surface of said ferrimagnetic substrate; a DC magnetic field being applied perpendicularly to the plane of said ferrimagnetic substrate; the improvement comprising: a first reactance element connected in series with said input end of said each line conductor; and a second reactance element connected between said conductor plate and said outer conductor.
Claim 3
Dependent Claim
32 words
An improved circulator as defined in claim 1, wherein said first reactance element is composed of a second capacitive element, and said second reactance element is composed of a first inductive element.
Claim 4
Dependent Claim
19 words
An improved circulator as defined in claim 2, wherein said second capacitive element is a beam lead type capacitor.
Claim 5
Dependent Claim
18 words
The circulator as defined in claim 2, wherein said first inductive element is composed of a coiled wire.
Claim 6
Dependent Claim
27 words
An improved circulator as defined in claim 2, wherein a second inductive element and a third capacitive element are connected in series with said second capacitive element.
Claim 7
Dependent Claim
32 words
An improved circulator as defined in claim 1, wherein said first reactance element is composed of a first inductive element, and said second reactance element is composed of a second capacitive element.
Claim 8
Dependent Claim
19 words
An improved circulator as defined in claim 6, wherein said first inductive element is composed of a spiral inductor.
Claim 9
Dependent Claim
19 words
An improved circulator as defined in claim 6, wherein said first inductive element is composed of a coiled wire.
Claim 10
Dependent Claim
20 words
An improved circulator as defined in claim 6, wherein said second capacitive element is composed of a beam lead capacitor.
Claim 11
Dependent Claim
29 words
An improved circulator as defined in claim 6, wherein said first inductive element is composed of a narrow part formed at said input end of said each line conductor.
Claim 12
Dependent Claim
38 words
An improved circulator as defined in claim 6, further comprising a third capacitive element connected between the end of said first inductive element opposite its connection with the end of a respective line conductor and said conductor plate.
Claim 13
Dependent Claim
18 words
An improved circulator as defined in claim 11, wherein said third capacitive element comprises a beam lead capacitor.
Claim 14
Dependent Claim
29 words
An improved circulator as defined in claim 12, wherein said first inductive element is composed of a narrow part formed at said input end of said each line conductor.
Claim 15
Dependent Claim
27 words
An improved circulator as defined in claim 13, wherein said second capacitive element includes a dielectric substance layer interposed between said conductor plate and said outer conductor.
Claim 16
Dependent Claim
161 words
In a lumped element circulator including: a ferrimagnetic substrate; three line conductors arranged on a surface of said substrate with cross angles defined at 120* with respect to one another and in a manner to be insulated from one another; a conductor plate to which terminating ends of said respective line conductors are connected and which is provided on a back surface of said ferrimagnetic substrate; and a D.C. magnetic field being applied perpendicularly to the plane of said ferrimagnetic substrate; the improvement comprising: a first inductive element coupled between said conductor plate and an outer conductor; a first capacitive element connected in series with an input end of each line conductor; a second capacitive element connected between said input end of each line conductor and said first inductive element; and a second inductive element and a third capacitive element connected in series between the connection point of said second capacitive element and said first inductive element and said outer conductor.
Claim 17
Dependent Claim
161 words
In a lumped element circulator including: a ferrimagnetic substrate; three line conductors arranged on a surface of said substrate with cross angles defined at 120* with respect to one another and in a manner to be insulated from one another; a conductor plate to which terminating ends of said respective line conductors are connected and which is provided on a back surface of said ferrimagnetic substrate; and a D.C. magnetic field being applied perpendicularly to the plane of said ferrimagnetic substrate; the improvement comprising: a first inductive element coupled between said conductor plate and an outer conductor; a first capacitive element connected in series with an input end of each line conductor; a second capacitive element connected between said input end of each line conductor and said first inductive element; and a second inductive element and a third capacitive element connected in series between the connection point of said second capacitive element and said first inductive element and said outer conductor.
Claim 18
Dependent Claim
140 words
In a lumped element circulator including: a ferrimagnetic substrate; three line conductors arranged on a surface of said substrate with cross angles defined at 120* with respect to one another and in a manner to be insulated from one another; a conductor plate to which terminating ends of said respective line conductors are connected and which is provided on a back surface of said ferrimagnetic substrate; and a D.C. magnetic field being applied perpendicularly to the plane of said ferrimagnetic substrate; the improvement comprising: a first inductive element connected in series with an input of each line conductor; a first capacitive element coupled between said conductor plate and an outer conductor; and a second capacitive element connected between the end of said first inductive element opposite its connection with the end of a respective line conductor and said conductor plate.
Claim 19
Dependent Claim
140 words
In a lumped element circulator including: a ferrimagnetic substrate; three line conductors arranged on a surface of said substrate with cross angles defined at 120* with respect to one another and in a manner to be insulated from one another; a conductor plate to which terminating ends of said respective line conductors are connected and which is provided on a back surface of said ferrimagnetic substrate; and a D.C. magnetic field being applied perpendicularly to the plane of said ferrimagnetic substrate; the improvement comprising: a first inductive element connected in series with an input of each line conductor; a first capacitive element coupled between said conductor plate and an outer conductor; and a second capacitive element connected between the end of said first inductive element opposite its connection with the end of a respective line conductor and said conductor plate.
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) | 1977-09-16 | 1978-03-18 | 1978-09-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-09-16 | 1982-03-18 | 1982-09-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-09-16 | 1986-03-18 | 1986-09-17 | $7700.00 | Window Closed / Lapsed |