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Patent US6448864B1 successfully refreshed from Google Patents.
US6448864B1
Expired / Lapsed
US
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Balanced-unbalanced converting circuit, balanced-unbalanced converter, and communication device including the same
Assignee: Murata Manufacturing Co Ltd
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Filing: 2000-11-16
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Granted: 2002-09-10
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Expires: 2020-11-16
Abstract
Abstract Inner conductor formation holes having inner conductors formed on the inner walls thereof are formed in a dielectric block. Both of the ends of one of the inner conductors are open and led out as terminal electrodes which function as balanced ports. Both of the ends of another inner conductor are connected to an outer conductor to be grounded, and the center portion of the inner conductor between the ends is led out as a terminal electrode which functions as an unbalanced port. The circuit can also be realized with striplines or microstriplines on a dielectric substrate. Thus, a balanced-unbalanced converter having these terminal electrodes as balanced and unbalanced ports is formed.
Inventors
- 👤 Motoharu Hiroshima
- 👤 Shohachi Nishijima
- 👤 Hideyuki Kato
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 15:49
CPC Classifications
H; H01; H01P; H01P5/00; H01P5/08; H01P5/10
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
60 words
A balanced-unbalanced converting circuit comprising: a first transmission line having two open ends; and a second transmission line having two grounded ends, arranged substantially in parallel to the first transmission line; said first transmission line having two balanced ports connected respectively to the ends thereof; and said second transmission line having an unbalanced port connected substantially to the center thereof.
Claim 2
Dependent Claim
60 words
A balanced-unbalanced converting circuit comprising: a first transmission line having two open ends; and a second transmission line having two grounded ends, arranged substantially in parallel to the first transmission line; said first transmission line having two balanced ports connected respectively to the ends thereof; and said second transmission line having an unbalanced port connected substantially to the center thereof.
Claim 3
Dependent Claim
23 words
A balanced-unbalanced converting circuit according to claim 1 , wherein said first and second transmission lines have electrical lengths that are substantially equal.
Claim 4
Dependent Claim
75 words
A balanced-unbalanced converting circuit according to claim 1 , further comprising: a third transmission line having two grounded ends, provided substantially in parallel to the first transmission line, the electrical length of the third transmission line being substantially equal to the electrical length of the first transmission line and being different from the electrical length of the second transmission line; wherein the third transmission line has an unbalanced port connected substantially to the center thereof.
Claim 5
Dependent Claim
66 words
A balanced-unbalanced converting circuit according to claim 1 , further comprising: a third transmission line having two grounded ends, provided substantially in parallel to the first transmission line, the electrical length of the first transmission line being in a range between the electrical lengths of the second and third transmission lines; wherein the third transmission line has an unbalanced port connected substantially to the center thereof.
Claim 6
Dependent Claim
36 words
A balanced-unbalanced converter including the transmission lines defined in any one of claims 1 - 4 , each transmission line comprising a microstrip line or strip line comprising a conductor film formed on a dielectric substrate.
Claim 7
Dependent Claim
59 words
A balanced-unbalanced converter according to claim 5 , wherein at least a part of at least one of the conductor films comprises a thin film multilayer electrode having an area in which plural thin film conductor layers and plural thin film dielectric layers, each having a thickness smaller than the skin depth at an operating frequency, are alternately laminated.
Claim 8
Dependent Claim
33 words
A balanced-unbalanced converter including the transmission lines defined in any one of claims 1 - 4 , each comprising a dielectric coaxial transmission line comprising a conductor film formed in a dielectric block.
Claim 9
Dependent Claim
59 words
A balanced-unbalanced converter according to claim 7 , wherein at least a part of at least one of the conductor films comprises a thin film multilayer electrode having an area in which plural thin film conductor layers and plural thin film dielectric layers, each having a thickness smaller than the skin depth at an operating frequency, are alternately laminated.
Claim 10
Dependent Claim
52 words
A communication device including a balanced-unbalanced converter as defined in any one of claims 1 - 4 ; a high-frequency circuit comprising at least one of a transmitting circuit and a receiving circuit, said high-frequency circuit having a plurality of components; wherein two of said components are interconnected by said balanced-unbalanced converter.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2005-09-09 | 2006-03-11 | 2006-09-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2009-09-09 | 2010-03-11 | 2010-09-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2013-09-09 | 2014-03-11 | 2014-09-10 | $7700.00 | Window Closed / Lapsed |