EP0444948A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Dielectric resonator and a filter using same
Assignee: FDK Corp
•
Filing: 1991-03-01
•
Granted: —
•
Expires: 2011-03-01
Abstract
Abstract A dielectric resonator (38) with a dielectric block (30). The block has a plurality of resonance apertures (32) and coupling-prevention aperture (34) between the adjacent resonance apertures within the block. The block is entirely coated with a conductive film except a limited portion around the one end of the resonance apertures.
Inventors
- 👤 Hiroyuki Sogo
- 👤 Yasuyuki Kondo
- 👤 Kazuhisa Yamazaki
- 👤 Junji Konda
- 👤 Shigemitsu Suzuki
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-31 21:12
CPC Classifications
H; H01; H01P; H01P1/00; H01P1/20; H01P1/201; H01P1/205; H01P1/2056
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
152 words
A dielectric resonator having a dielectric block comprising: a plurality of resonance apertures extending in parallel to each other at a predetermined interval within said dielectric block, a non-conductive open side on an outer surface of said dielectric block, an end of each of said resonance apertures lying on said non-conductive open side, an electrically conductive film extending entirely along an inner surface of said resonance apertures and an outer surface of said dielectric block except a surface of said non-conductive open side to provide central conductor portions in said resonance apertures and outer conductor portions on outer surfaces of said dielectric block, and a decoupling aperture between and in parallel to said resonance apertures for shielding electromagnetically the adjacent resonance apertures with each other, said decoupling aperture having an electrically conductive film on an interior thereof and two opposite openings electrically connected with said outer conductive portions of said dielectric block.
Claim 2
Dependent Claim
16 words
A dielectric resonator according to claim 1, wherein said decoupling aperture has a round sectional shape.
Claim 3
Dependent Claim
16 words
A dielectric resonator according to claim 1, wherein said decoupling aperture has a rectangular sectional shape.
Claim 4
Dependent Claim
23 words
A dielectric resonator according to claim 1, wherein a recess is formed along each of said decoupling apertures and between said resonance apertures.
Claim 5
Dependent Claim
19 words
A dielectric resonator according to claim 4, wherein said recess extends in a widthwise direction of said dielectric block.
Claim 6
Dependent Claim
189 words
A dielectric filter comprising a coaxial resonator with a dielectric block and coils, said coaxial resonator comprising: a plurality of resonance apertures extending in parallel to each other at a predetermined interval within said dielective block, a non-conductive open side on an outer surface of said dielectric block, an end of each of said resonance apertures lying on said non-conductive open side, an electrically conductive film extending entirely along an inner surface of said resonance apertures and an outer surface of said dielectric block except a surface of said non-conductive open side to provide central conductor portions in said resonance apertures and outer conductor portions on outer surfaces of said dielectric block, a decoupling aperture between and in parallel to said resonance apertures for shielding electromagnetically the adjacent resonance apertures with each other, said decoupling apertures having an electrically conductive film on an interior thereof and two opposite openings electrically connected with said outer conductive portions of said dielectric block, a recess formed along each of said decoupling apertures and between said resonance opertures, wherein said resonance apertures are connected to each other by said coils in said recess.
Claim 7
Dependent Claim
34 words
A filter according to claim 6, a capacitor is connected to said resonance aperture at said non-conductive open side, and said capacitor of each resonance aperture is connected to each other by a coil.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
Maintenance schedule is calculated for granted US utility patents.