US4138652A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dielectric resonator capable of suppressing spurious mode
Assignee: Murata Manufacturing Co Ltd
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Filing: 1977-05-17
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Granted: 1979-02-06
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Expires: 1997-05-17
Abstract
Abstract The present disclosure relates to a dielectric resonator for use in microwave filters and other devices for receiving microwave. The arrangement of the present disclosure comprises a resonator made of a dielectric material of any known type and a bar member provided approximately in alignment with the direction of formation of the electric field produced by the propagation of a spurious mode in the dielectric resonator. During the propagation of the dominant mode accompanied by the spurious mode, the electric field produced by the spurious mode causes the bar member to produce a current flowing therethrough, thus consuming the energy of the spurious mode in the bar member, and substantially eliminating the spurious mode.
Inventors
- 👤 Toshio Nishikawa
- 👤 Youhei Ishikawa
- 👤 Sadahiro Tamura
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 22:55
CPC Classifications
H; H01; H01P; H01P7/00; H01P7/10; H01P1/00; H01P1/20; H01P1/207; H01P1/208; H01P1/2084
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
121 words
A dielectric resonator for suppressing spurious modes comprising: a cylindrical block of dielectric material having flat surfaces on the ends thereof; and at least one straight, thin, electrically conducting bar member provided approximately in alignment with the axis of said cylindrical block of dielectric material and approximately in alignment with the direction of the electric field produced by propagation of a spurious mode in said cylindrical block of dielectric material and said bar member being in other than a retaining relationship with said cylindrical block of dielectric material, whereby said electric field produced by the spurious mode produces a current in said bar member thereby consuming the energy of the spurious mode in the bar member for suppressing the spurious mode.
Claim 2
Dependent Claim
121 words
A dielectric resonator for suppressing spurious modes comprising: a cylindrical block of dielectric material having flat surfaces on the ends thereof; and at least one straight, thin, electrically conducting bar member provided approximately in alignment with the axis of said cylindrical block of dielectric material and approximately in alignment with the direction of the electric field produced by propagation of a spurious mode in said cylindrical block of dielectric material and said bar member being in other than a retaining relationship with said cylindrical block of dielectric material, whereby said electric field produced by the spurious mode produces a current in said bar member thereby consuming the energy of the spurious mode in the bar member for suppressing the spurious mode.
Claim 3
Dependent Claim
28 words
A dielectric resonator as claimed in claim 1, wherein said bar member is provided adjacent to one of said flat surfaces of said cylindrical block of dielectric material.
Claim 4
Dependent Claim
44 words
A dielectric resonator as claimed in claim 2, wherein the tip end of said bar member is spaced apart from said flat surface of said cylindrical block of dielectric material at a distance less than the thickness of said cylindrical block of dielectric material.
Claim 5
Dependent Claim
37 words
A dielectric resonator as claimed in claim 1, wherein said cylindrical block of dielectric material has at least one aperture formed therein in alignment with the direction of formation of said electric field of said spurious mode.
Claim 6
Dependent Claim
26 words
A dielectric resonator as claimed in claim 4, wherein said bar member is provided to pass through said aperture parallel to the axis of said aperture.
Claim 7
Dependent Claim
27 words
A dielectric resonator as claimed in claim 5, wherein said bar member has a diameter smaller than d/10, in which d is the diameter of said aperture.
References Cited (Backward Citations)
US3475642A
Cited
US4028652A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1982-02-05 | 1982-08-07 | 1983-02-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-02-05 | 1986-08-07 | 1987-02-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-02-05 | 1990-08-07 | 1991-02-06 | $7700.00 | Window Closed / Lapsed |