Dielectric filter and RF apparatus employing thereof
AssigneeMatsushita Electric Industrial Co., Ltd.
InventorsMichiaki Matsuo, Hiroyuki Yabuki, Morikazu Sagawa
Life of this patent
Estimating the term…
Abstract
A dielectric filter includes a dielectric block having multiple through holes which are created in parallel and grooves which are created around the opening of the through holes. A conductor is formed inside the grooves and the through holes. The inside conductors and in-groove conductors are connected at the opening of the through hole surrounded with the groove. The inside conductors and an outside conductor are connected at a second end. The opening of the through hole is formed inside an open-circuit end of the dielectric block.
Claims38
A dielectric filter comprising:
- a dielectric block having a plurality of through holes formed in parallel with a respective groove surrounding a respective opening of at least one of said through holes,
- an in-groove conductor formed inside said groove;
- an inside conductor formed inside each of said through holes;
- an outside conductor covering a periphery of said dielectric block;
- and
- an I/O electrode connected to an external circuit and electromagnetically coupled with said inside conductor;
- wherein at least one of said through holes has no groove surrounding said through hole, said outside conductor and said inside conductor are connected, and said in-groove conductor and said inside conductor are connected.
A dielectric filter comprising:
- a dielectric block having first and second ends and having
- a plurality of through holes formed in parallel in said dielectric block, said through holes having an opening on each of said first and second ends;
- at least one groove formed on said first end of said dielectric block, said groove being formed surrounding at least one of said through holes;
- an in-groove conductor inside said groove;
- an inside conductor inside each of said through holes, said inside conductor being connected to said in-groove conductor at the opening of said through hole surrounded with said groove;
- an outside conductor covering the periphery of said dielectric block, said outside conductor being connected to said inside conductor at said second end having the opening of each of said through hole;
- and
- an I/O electrode electromagnetically coupled with said inside conductor wherein at least one of said through holes has no groove surrounding said through hole.
A RF apparatus employing the dielectric filter comprising:
- a dielectric block having a plurality of through holes formed in parallel in said dielectric block;
- and at least one groove surrounding a respective opening of at least one of said through holes;
- an in-groove conductor inside said groove;
- an inside conductor inside each of said through holes;
- an outside conductor covering a periphery of said dielectric block;
- and
- an I/O electrode connected to an external circuit and electromagnetically coupled with said inside conductor;
- wherein said outside conductor and said inside conductor are connected, at least one of said through holes has no groove surrounding said through hole, and said in-groove conductor and said inside conductor are connected.
Dependencies are inferred from the claim text.