US5079528A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dielectric filter
Assignee: Murata Manufacturing Co Ltd
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Filing: 1990-06-21
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Granted: 1992-01-07
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Expires: 2010-06-21
Abstract
Abstract A dielectric filter which includes a plurality of dielectric resonators, and a plurality of coupling capacitors connected in series to each other, at least one portion of respective portions between the neighboring coupling capacitors being grounded through a series circuit of a series resonance capacitor and the corresponding one of the dielectric resonators, and other portions of the respective portions between them being grounded through other dielectric resonators. The coupling capacitors are each formed between electrodes formed on a substrate, and the series resonance capacitor is formed to confront the electrodes constituting the coupling capacitors.
Inventors
- 👤 Tadahiro Yorita
- 👤 Yasuo Yamada
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 21:20
CPC Classifications
H; H01; H01P; H01P1/00; H01P1/20; H01P1/201; H01P1/205; H01P1/2053
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
125 words
A dielectric filter which comprises: a plurality of dielectric resonators, and a plurality of coupling capacitors connected in series with each other, each junction between a neighboring pair of coupling capacitors being associated with a corresponding one of said dielectric resonators, at least one of said junctions being grounded through a series circuit of a series resonance capacitor and the corresponding one of the dielectric resonators, and the other junctions being grounded through the other dielectric resonators, said coupling capacitors being each formed between electrodes formed on one side of a substrate, and said series resonance capacitor being formed by one of said electrodes constituting said coupling capacitors, and by a confronting electrode which confronts said one electrode on the opposite side of said substrate.
Claim 2
Dependent Claim
125 words
A dielectric filter which comprises: a plurality of dielectric resonators, and a plurality of coupling capacitors connected in series with each other, each junction between a neighboring pair of coupling capacitors being associated with a corresponding one of said dielectric resonators, at least one of said junctions being grounded through a series circuit of a series resonance capacitor and the corresponding one of the dielectric resonators, and the other junctions being grounded through the other dielectric resonators, said coupling capacitors being each formed between electrodes formed on one side of a substrate, and said series resonance capacitor being formed by one of said electrodes constituting said coupling capacitors, and by a confronting electrode which confronts said one electrode on the opposite side of said substrate.
Claim 3
Dependent Claim
44 words
A dielectric filter as claimed in claim 1, wherein a second function between a second pair of said neighboring coupling capacitors is grounded through another series circuit of a series resonance capacitor and the one of the dielectric resonators corresponding to said second junction.
Claim 4
Dependent Claim
41 words
A dielectric filter as claimed in claim 1, wherein the plurality of the dielectric resonators include separator dielectric resonators each having a dielectric member provided with an outer conductor and an inner conductor coupled with said electrode formed on said substrate.
Claim 5
Dependent Claim
41 words
A dielectric filter as claimed in claim 1, wherein the plurality of the dielectric resonators is formed by one dielectric block provided with an outer conductor and a required number of inner conductors coupled with said electrodes formed on said substrate.
Claim 6
Dependent Claim
147 words
A dielectric filter which comprises: a plurality of dielectric resonators, and a plurality of coupling capacitors connected in series with each other, each junction between a neighboring pair of coupling capacitors being associated with a corresponding one of said dielectric resonators, at least one of said junctions being grounded through a series circuit of a series resonance capacitor and the corresponding one of the dielectric resonators, and the other junctions being grounded through the other dielectric resonators, said coupling capacitors being each formed between electrodes formed on one side of a first substrate, and said series resonance capacitor being constituted by confronting electrodes formed on opposite faces of a second substrate, said second substrate being mounted on said first substrate with one said electrode on one side of said second substrate being connected with a corresponding one of said coupling capacitor electrodes formed on said first substrate.
Claim 7
Dependent Claim
147 words
A dielectric filter which comprises: a plurality of dielectric resonators, and a plurality of coupling capacitors connected in series with each other, each junction between a neighboring pair of coupling capacitors being associated with a corresponding one of said dielectric resonators, at least one of said junctions being grounded through a series circuit of a series resonance capacitor and the corresponding one of the dielectric resonators, and the other junctions being grounded through the other dielectric resonators, said coupling capacitors being each formed between electrodes formed on one side of a first substrate, and said series resonance capacitor being constituted by confronting electrodes formed on opposite faces of a second substrate, said second substrate being mounted on said first substrate with one said electrode on one side of said second substrate being connected with a corresponding one of said coupling capacitor electrodes formed on said first substrate.
Claim 8
Dependent Claim
44 words
A dielectric filter as claimed in claim 5, wherein a second junction between a second pair of said neighboring coupling capacitors is grounded through another series circuit of a series resonance capacitor and the one of the dielectric resonators corresponding to said second junction.
Claim 9
Dependent Claim
42 words
A dielectric filter as claimed in claim 5, wherein the plurality of the dielectric resonators include separate dielectric resonators each having a dielectric member provided with an outer conductor, and provided with an inner conductor coupled with one of said above-mentioned electrodes.
Claim 10
Dependent Claim
38 words
A dielectric filter as claimed in claim 5, wherein the plurality of the dielectric resonators is formed by one dielectric block provided with an outer conductor and a required number of lines conductors coupled with said above-mentioned electrodes.
References Cited (Backward Citations)
GB1485505A
Cited
US4276525A
Cited
EP0005525A1
Cited
US4546334A
Cited
JPS61179603A
Cited
JPS61191101A
Cited
JPS61193501A
Cited
US4703291A
Cited
GB2174849A
Cited
JPS61237501A
Cited
JPS62117401A
Cited
EP0312011A2
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1995-01-06 | 1995-07-08 | 1996-01-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-01-06 | 1999-07-08 | 2000-01-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-01-06 | 2003-07-08 | 2004-01-07 | $7700.00 | Window Closed / Lapsed |