Patent US7397328B2 successfully refreshed from Google Patents.
US7397328B2
Expired / Lapsed
US
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Balanced filter device
Assignee: Taiyo Yuden Co Ltd
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Filing: 2005-09-30
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Granted: 2008-07-08
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Expires: 2025-09-30
Abstract
Abstract A balanced filter suitable for a reduction of the filter size. The balanced filter comprises strip-line resonators (SL 1 a , SL 1 b ) constituting resonance electrodes on the unbalanced side, strip-line resonators (SL 2 a , SL 2 b ) disposed in adjacently opposed relation to the strip-lines on the unbalanced side and constituting resonance electrodes on the balanced side, strip-line resonators (SL 3 a , SL 3 b ) disposed in adjacently opposed relation to the strip-lines on the balanced side and constituting stage constituting resonance electrodes, and impedance elements (Z) coupling the resonance electrodes on the balanced side to the stage constituting resonance electrodes.
Inventors
- 👤 Hisahiro Yasuda
- 👤 Takeshi Kosaka
- 👤 Makoto Inoue
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 15:45
CPC Classifications
H; H01; H01P; H01P1/00; H01P1/20; H01P1/201; H01P1/203; H01P1/20327; H01P1/20354; H01P1/20381; H01P5/00; H01P5/08; H01P5/10
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
76 words
A balanced filter device comprising: an unbalanced-side resonance electrode coupled to an unbalanced terminal; a balanced-side resonance electrode coupled to a balanced terminal; and a stage constituting resonance electrode coupled to the balanced terminal, wherein the unbalanced-side resonance electrode, the balanced-side resonance electrode, and the stage constituting resonance electrode are formed on respective dielectric layers in laminated arrangement, wherein the balanced-side resonance electrode is located between the unbalanced-side resonance electrode and the stage constituting resonance electrode.
Claim 2
Dependent Claim
76 words
A balanced filter device comprising: an unbalanced-side resonance electrode coupled to an unbalanced terminal; a balanced-side resonance electrode coupled to a balanced terminal; and a stage constituting resonance electrode coupled to the balanced terminal, wherein the unbalanced-side resonance electrode, the balanced-side resonance electrode, and the stage constituting resonance electrode are formed on respective dielectric layers in laminated arrangement, wherein the balanced-side resonance electrode is located between the unbalanced-side resonance electrode and the stage constituting resonance electrode.
Claim 3
Dependent Claim
33 words
The balanced filter device according to claim 1 , wherein the stage constituting resonance electrode is formed in a comb-line arrangement opposing and facing said unbalanced-side resonance electrode and/or said balanced-side resonance electrode.
Claim 4
Dependent Claim
26 words
The balanced filter device according to claim 1 , wherein the stage constituting resonance electrode is coupled to said balanced-side resonance electrode through an impedance element.
Claim 5
Dependent Claim
41 words
The balanced filter device according to claim 2 , wherein coupling portions of said unbalanced-side resonance electrode and said balanced-side resonance electrode comprise λ/4 strip-lines, and wherein said stage constituting resonance electrode comprises a strip-line having a length different from λ/4.
Claim 6
Dependent Claim
41 words
The balanced filter device according to claim 1 , wherein: the stage constituting resonance electrode is arranged adjacent to said unbalanced-side resonance electrode and/or said balanced-side resonance electrode, and said unbalanced-side resonance electrode is arranged adjacent to said balanced-side resonance electrode.
Claim 7
Dependent Claim
41 words
The balanced filter device according to claim 1 , wherein: said stage constituting resonance electrode is arranged opposite to said unbalanced-side resonance electrode or said balanced-side resonance electrode; and said unbalanced-side resonance electrode is arranged opposite to said balanced-side resonance electrode.
Claim 8
Dependent Claim
48 words
The balanced filter device according to claim 1 , wherein: the stage constituting resonance electrode is arranged adjacent to said unbalanced-side resonance electrode and/or said balanced-side resonance electrode; and said unbalanced-side resonance electrode, said balanced-side resonance electrode, and said stage constituting resonance electrode arc each comprise a strip-line.
Claim 9
Dependent Claim
115 words
The balanced filter device according to claim 1 , having a strip-line structure, wherein: the unbalanced-side resonance electrode is formed on a first dielectric layer; the balanced-side resonance electrode is formed on a second dielectric layer; and the device further comprises: a first ground electrode formed on a third dielectric layer; and a second ground electrodes formed on a fourth dielectric layer, wherein the first and second dielectric layers are between the third and fourth dielectric layers; and wherein: the stage constituting resonance electrode is formed on a fifth dielectric layer; said unbalanced-side resonance electrode is arranged opposite said balanced-side resonance electrode; and said balanced-side resonance electrode is arranged opposite said stage constituting resonance electrode.
Claim 10
Dependent Claim
36 words
The balanced filter device according to claim 8 , further comprising a coupling electrode formed on a sixth dielectric layer, said coupling electrode being arranged between said balanced-side resonance electrode and said stage constituting resonance electrode.
Claim 11
Dependent Claim
35 words
The balanced filter device according to claim 8 , further comprising a DC electrode formed on a sixth dielectric layer, said DC electrode being arranged between said stage constituting resonance electrode and said ground electrodes.
Claim 12
Dependent Claim
126 words
The balanced filter device according to claim 1 having a strip-line structure, wherein: the unbalanced-side resonance electrode is formed on a first dielectric layer; the balanced-side resonance electrode is formed on a second dielectric layer; and the device further comprises: a first ground electrode formed on a third dielectric layer; and a second ground electrode formed on a fourth dielectric layer, wherein the first and second dielectric layers are positioned between the third and fourth dielectric layers; and wherein said stage constituting resonance electrode is formed on a fifth dielectric layer, and comprises a shorted end and an open end; said unbalanced-side resonance electrode is arranged opposite to said balanced-side resonance electrode; and said balanced-side resonance electrode is arranged opposite to said stage constituting resonance electrode.
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