Patent US5870006A successfully refreshed from Google Patents.
US5870006A
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Dielectric filter
Assignee: Murata Manufacturing Co Ltd
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Filing: 1996-11-14
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Granted: 1999-02-09
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Expires: 2016-11-14
Abstract
Abstract For a BEF type dielectric filter, a plurality of one-stage band-elimination filters (BEFs) each composed of two resonant lines inter-digitally pair-coupled to each other, are provided within one dielectric block and phase-shifting-coupled to each other at an electrical angle of π/2 in an inter-digital or comb-line manner. In addition, an input or output resonant line is provided which is phase-shifting-coupled to an input or output resonant line of the BEF type dielectric filter at an electrical angle of π/2 in an inter-digital or comb-line manner.
Inventors
- 👤 Hitoshi Tada
- 👤 Hideyuki Kato
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 16:50
CPC Classifications
H; H01; H01P; H01P1/00; H01P1/20; H01P1/201; H01P1/205; H01P1/2056; H01P1/213
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
84 words
A band-elimination filter type dielectric filter comprising: a plurality of one-stage band-elimination filters each composed of a pair of resonant lines inter-digitally coupled to each other, said plurality of one-stage band-elimination filters being spaced apart from each other within one dielectric block, and coupled to each other with phase-shift at an electrical angle of π/2, and an additional input/output resonant line which is coupled to a selected resonant line of said plurality of one-stage band-elimination filters with phase-shift at an electrical angle of π/2.
Claim 2
Dependent Claim
84 words
A band-elimination filter type dielectric filter comprising: a plurality of one-stage band-elimination filters each composed of a pair of resonant lines inter-digitally coupled to each other, said plurality of one-stage band-elimination filters being spaced apart from each other within one dielectric block, and coupled to each other with phase-shift at an electrical angle of π/2, and an additional input/output resonant line which is coupled to a selected resonant line of said plurality of one-stage band-elimination filters with phase-shift at an electrical angle of π/2.
Claim 3
Dependent Claim
20 words
A filter as defined in claim 1, wherein said plurality of one-stage band-elimination filters are inter-digitally coupled to each other.
Claim 4
Dependent Claim
20 words
A filter as defined in claim 1, wherein said plurality of one-stage band-elimination filters are comb-line coupled to each other.
Claim 5
Dependent Claim
24 words
A filter as defined in claim 1, wherein said additional input/output resonant line and said selected resonant line are inter-digitally coupled to each other.
Claim 6
Dependent Claim
24 words
A filter as defined in claim 1, wherein said additional input/output resonant line and said selected resonant line are comb-line coupled to each other.
Claim 7
Dependent Claim
31 words
A band-elimination filter type dielectric filter as defined in claim 1, wherein an open end of said additional input/output resonant line is located at an end surface of said dielectric block.
Claim 8
Dependent Claim
34 words
A band-elimination filter type dielectric filter as defined in claim 1, wherein an open end of said additional input/output resonant line is located spaced away from an opening of a resonant line hole thereof.
Claim 9
Dependent Claim
32 words
A band-elimination filter type dielectric filter as defined in claim 1, wherein an open end of said additional input/output resonant line is located at an opening of a resonant line hole thereof.
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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) | 2002-02-08 | 2002-08-10 | 2003-02-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2006-02-08 | 2006-08-10 | 2007-02-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2010-02-08 | 2010-08-10 | 2011-02-09 | $7700.00 | Window Closed / Lapsed |