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EP0467267A2 Expired / Lapsed EP ⏱️ 0.0 years remaining

Dielectric filters

Assignee: Panasonic Holdings Corp
•
Filing: 1991-07-15
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Granted: —
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Expires: 2011-07-15
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Abstract

Abstract This invention is to offer a compact and high performance dielectric filter consisting of a quarter wavelength dielectric body provided with a through-hole between upper and lower surfaces of said dielectric body, electrodes deposited on an external and lower surfaces of said dielectric body, and more than at least two independent electrodes provided on internal surface of said through-hole, extending to upper and lower surfaces of said dielectric body. With this dielectric filter construction, said through-hole performs a role to construct plural quarter wavelength resonators and performs, at the same time, a role to adjust the coupling between said plural resonators, yielding a compact dielectric filter of simple construction.

Inventors

  • 👤 Kimio Aizawa
  • 👤 Takashi Fujino
  • 👤 Toshio Ishizaki

Bibliographic Details

Application Number —
Jurisdiction EP
Data Source google_patents
Last Synchronized 2026-11-07 12:07
CPC Classifications
H; H01; H01P; H01P1/00; H01P1/20; H01P1/201; H01P1/205; H01P1/2056

Claims Analysis

Total Claims: 6
Claim 1
Independent Claim 64 words
A dielectric filter comprised of a pillar-shaped quarter wavelength dielectric body having a through-hole between upper and lower surfaces of said dielectric body provided with electrodes on external and lower surface of said dielectric body, and provided further with more than at least two independent electrodes on internal surfaces of said through-hole, extending to upper and lower surfaces of said quarter wavelength dielectric body.
Claim 2
Dependent Claim 64 words
A dielectric filter comprised of a pillar-shaped quarter wavelength dielectric body having a through-hole between upper and lower surfaces of said dielectric body provided with electrodes on external and lower surface of said dielectric body, and provided further with more than at least two independent electrodes on internal surfaces of said through-hole, extending to upper and lower surfaces of said quarter wavelength dielectric body.
Claim 3
Dependent Claim 22 words
A dielectric filter according to Claim 1 wherein said through-hole is provided with more than at least two column shaped through-hole parts.
Claim 4
Dependent Claim 43 words
A dielectric filter according to Claims 1 or 2 wherein an insulator incorporating more than at least two independent lead wires within and having an external shape fitted to said through-hole provided on said quarter wavelength dielectric body is integrated within said through-hole.
Claim 5
Dependent Claim 30 words
A dielectric filter according to Claims 1 or 2 wherein an electrode to adjust coupling between isolated electrodes provided within said through-hole is provided on said quarter wavelength dielectric body.
Claim 6
Dependent Claim 40 words
A dielectric filter according to Claims 1 or 2 wherein electrodes which are capacitively coupled to electrodes within said through-hole, are provided on an upper surface of said quarter wavelength dielectric body in order to input and output electric signals.

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