US5945894A
Expired / Lapsed
US
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Dielectric resonator and filter utilizing a non-radiative dielectric waveguide device
Assignee: Murata Manufacturing Co Ltd
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Filing: 1997-06-26
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Granted: 1999-08-31
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Expires: 2017-06-26
Abstract
Abstract A dielectric resonator capable of resonating at a predetermined resonance frequency has a dielectric substrate, a first electrode formed on a first surface of the dielectric substrate and having a first opening, a second electrode formed on a second surface of the dielectric substrate and having a second opening, a first conductor plate disposed by being spaced apart from the dielectric substrate by a predetermined distance, and a second conductor plate disposed by being spaced apart from the dielectric substrate by a predetermined distance, wherein at least one of said first and second conductor plates is electrically connected to at least one of said first and second electrodes. The region of the dielectric substrate defined between the first and second electrodes, a free space defined between the first electrode and the first conductor plate and another free space defined between the second electrode and the second conductor plate are cut-off regions for attenuating a high-frequency signal having the same frequency as the resonance frequency. This dielectric resonator can be used in a millimeter wave band, can resonate with markedly small variations of its resonance frequency even if the temperature thereof varies, and can be manufactured at a low cost.
Inventors
- 👤 Yohei Ishikawa
- 👤 Toshiro Hiratsuka
- 👤 Kenichi Iio
- 👤 Sadao Yamashita
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 14:45
CPC Classifications
H; H01; H01P; H01P1/00; H01P1/20; H01P1/201; H01P1/203; H01P1/20309; H01P1/20318; H01P7/00; H01P7/10
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
198 words
A TE0mn mode dielectric resonator having a resonance frequency , where 1≦m and 0≦n, comprising: a dielectric substrate having a first surface and a second surface opposite from each other; a first electrode formed on the first surface of said dielectric substrate; a first opening formed in the first electrode on the first surface of said dielectric substrate; a second electrode formed on the second surface of said dielectric substrate; a second opening formed in the second electrode in substantially the same shape as said first opening and positioned substantially opposite said first opening; a first conductor plate disposed spaced apart from the first surface of said dielectric substrate by a predetermined distance, a portion of said first conductor plate facing said first opening; a second conductor plate disposed spaced apart from the second surface of said dielectric substrate by a predetermined distance, a portion of said second conductor plate facing said second opening, wherein at least one of said first and second conductor plates is electrically connected to at least one of said first and second electrodes; and an input element and an output element, said input and output elements being electromagnetically coupled with said dielectric resonator.
Claim 2
Dependent Claim
198 words
A TE0mn mode dielectric resonator having a resonance frequency , where 1≦m and 0≦n, comprising: a dielectric substrate having a first surface and a second surface opposite from each other; a first electrode formed on the first surface of said dielectric substrate; a first opening formed in the first electrode on the first surface of said dielectric substrate; a second electrode formed on the second surface of said dielectric substrate; a second opening formed in the second electrode in substantially the same shape as said first opening and positioned substantially opposite said first opening; a first conductor plate disposed spaced apart from the first surface of said dielectric substrate by a predetermined distance, a portion of said first conductor plate facing said first opening; a second conductor plate disposed spaced apart from the second surface of said dielectric substrate by a predetermined distance, a portion of said second conductor plate facing said second opening, wherein at least one of said first and second conductor plates is electrically connected to at least one of said first and second electrodes; and an input element and an output element, said input and output elements being electromagnetically coupled with said dielectric resonator.
Claim 3
Dependent Claim
46 words
A dielectric resonator according to claim 1, wherein said dielectric substrate has a thickness and a dielectric constant such that the portion of said dielectric substrate other than a region defined between said first opening and said second opening attenuates a signal having said resonance frequency.
Claim 4
Dependent Claim
43 words
A dielectric resonator according to claim 1, wherein the spacing between the first surface of said dielectric substrate and said first conductor plate is such that a signal having said resonance frequency is attenuated between said first electrode and said first conductor plate.
Claim 5
Dependent Claim
43 words
A dielectric resonator according to claim 1, wherein the spacing between the second surface of said dielectric substrate and said second conductor plate is such that a signal having said resonance frequency is attenuated between said second electrode and said second conductor plate.
Claim 6
Dependent Claim
46 words
A dielectric resonator according to claim 1, wherein a dielectric is provided in at least one space between said first electrode on said first surface and said first conductor plate, and said space between said second electrode on said second surface and said second conductor plate.
Claim 7
Dependent Claim
20 words
A dielectric resonator according to claim 1, wherein at least one of said first and second openings is substantially circular.
Claim 8
Dependent Claim
33 words
A dielectric resonator according to claim 1, further comprising a cavity formed by at least said first and second conductor plates, an electromagnetic field of said dielectric resonator being confined in said cavity.
Claim 9
Dependent Claim
218 words
A TE0mn mode dielectric resonator devices where 1≦m and 0≦n, comprising: a TE0mn dielectric resonator which comprises: a dielectric substrate having a first surface and a second surface opposite from each other; a first electrode formed on the first surface of said dielectric substrate; a first opening formed in the first electrode on the first surface of said dielectric substrate; a second electrode formed on the second surface of said dielectric substrate; a second opening formed in the second electrode in substantially the same shape as said first opening and positioned substantially opposite said first opening; a first conductor plate disposed spaced apart from the first surface of said dielectric substrate by a predetermined distance, a portion of said first conductor plate facing said first opening; a second conductor plate disposed spaced apart from the second surface of said dielectric substrate by a predetermined distance, a portion of said second conductor plate facing said second opening; wherein at least one of said first and second conductor plates is electrically connected to at least one of said first and second electrodes; and an input device for inputting a signal to said dielectric resonator; and an output device for outputting a signal from said dielectric resonator, said input device and said output device being electromagnetically coupled with said dielectric resonator.
Claim 10
Dependent Claim
218 words
A TE0mn mode dielectric resonator devices where 1≦m and 0≦n, comprising: a TE0mn dielectric resonator which comprises: a dielectric substrate having a first surface and a second surface opposite from each other; a first electrode formed on the first surface of said dielectric substrate; a first opening formed in the first electrode on the first surface of said dielectric substrate; a second electrode formed on the second surface of said dielectric substrate; a second opening formed in the second electrode in substantially the same shape as said first opening and positioned substantially opposite said first opening; a first conductor plate disposed spaced apart from the first surface of said dielectric substrate by a predetermined distance, a portion of said first conductor plate facing said first opening; a second conductor plate disposed spaced apart from the second surface of said dielectric substrate by a predetermined distance, a portion of said second conductor plate facing said second opening; wherein at least one of said first and second conductor plates is electrically connected to at least one of said first and second electrodes; and an input device for inputting a signal to said dielectric resonator; and an output device for outputting a signal from said dielectric resonator, said input device and said output device being electromagnetically coupled with said dielectric resonator.
Claim 11
Dependent Claim
25 words
A dielectric resonator device according to claim 8, wherein at least one of said input device and said output device comprises a nonradiative dielectric waveguide.
Claim 12
Dependent Claim
244 words
A high-frequency band-pass filter device comprising: a plurality of TE0mn mode dielectric resonators, where 1≦m and 0≦n, arranged at predetermined intervals, each of said dielectric resonators having: a dielectric substrate having a first surface and a second surface opposite from each other; a first electrode formed on the first surface of said dielectric substrate; a first opening formed in the first electrode on the first surface of said dielectric substrate; a second electrode formed on the second surface of said dielectric substrate: a second opening formed in the second electrode in substantially the same shape as said first opening and positioned substantially opposite said first opening; a first conductor plate disposed spaced apart from the first surface of said dielectric substrate by a predetermined distance, a portion of said first conductor plate facing said first opening; and a second conductor plate disposed spaced apart from the second surface of said dielectric substrate by a predetermined distance, a portion of said second conductor plate facing said second opening; wherein at least one of said first and second conductor plates is electrically connected to at least one of said first and second electrodes; an input device for inputting a high-frequency signal to said dielectric resonators; and an output device for outputting a high-frequency signal from said dielectric resonators, said input device and said output device being electromagnetically coupled with said plurality of dielectric resonators, and said plurality of dielectric resonators being electromagnetically coupled with each other.
Claim 13
Dependent Claim
244 words
A high-frequency band-pass filter device comprising: a plurality of TE0mn mode dielectric resonators, where 1≦m and 0≦n, arranged at predetermined intervals, each of said dielectric resonators having: a dielectric substrate having a first surface and a second surface opposite from each other; a first electrode formed on the first surface of said dielectric substrate; a first opening formed in the first electrode on the first surface of said dielectric substrate; a second electrode formed on the second surface of said dielectric substrate: a second opening formed in the second electrode in substantially the same shape as said first opening and positioned substantially opposite said first opening; a first conductor plate disposed spaced apart from the first surface of said dielectric substrate by a predetermined distance, a portion of said first conductor plate facing said first opening; and a second conductor plate disposed spaced apart from the second surface of said dielectric substrate by a predetermined distance, a portion of said second conductor plate facing said second opening; wherein at least one of said first and second conductor plates is electrically connected to at least one of said first and second electrodes; an input device for inputting a high-frequency signal to said dielectric resonators; and an output device for outputting a high-frequency signal from said dielectric resonators, said input device and said output device being electromagnetically coupled with said plurality of dielectric resonators, and said plurality of dielectric resonators being electromagnetically coupled with each other.
Claim 14
Dependent Claim
24 words
A filter device according to claim 10, wherein at least one of said input device and said output device comprises a nonradiative dielectric waveguide.
Claim 15
Dependent Claim
42 words
A dielectric resonator according to claim 1, wherein a dielectric constant of said dielectric substrate and a dielectric constant of a dielectric disposed between said first and second electrodes and said corresponding first and second conductor plates are different from each other.
Claim 16
Dependent Claim
47 words
A dielectric resonator device according to claim 8, wherein, in said dielectric resonator, a dielectric constant of said dielectric substrate and a dielectric constant of a dielectric disposed between said first and second electrodes and said corresponding first and second conductor plates are different from each other.
Claim 17
Dependent Claim
48 words
A filter device according to claim 10, wherein, in each of said dielectric resonators, a dielectric constant of said dielectric substrate and a dielectric constant of a dielectric disposed between said first and second electrodes and said corresponding first and second conductor plates are different from each other.
Claim 18
Dependent Claim
25 words
A dielectric resonator device according to claim 1, wherein at least one of said input element and said output element comprises a nonradiative dielectric waveguide.
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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) | 2002-08-30 | 2003-03-01 | 2003-08-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2006-08-30 | 2007-03-01 | 2007-08-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2010-08-30 | 2011-03-01 | 2011-08-31 | $7700.00 | Window Closed / Lapsed |