US 2009/0267708 A1Published application

Dielectric Filter

AssigneeMurata Manufacturing Co., Ltd.

InventorsTakahiro Okada, Masayuki Atokawa, Takayoshi Yui

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Abstract

A dielectric filter having a dielectric block disposed on a mount board. The dielectric block includes inner conductor holes having open ends on the front surface of the dielectric block. Input/output electrodes are disposed on the undersurface of the dielectric block. Each of the input/output electrodes extends from the boundary between a side surface and the undersurface of the dielectric block to the boundary between the front surface and the undersurface of the dielectric block. An outer conductor includes undersurface electrode corner portions and an undersurface electrode main portion. Each of the undersurface electrode corner portions is disposed at a corner formed by the front surface and one of the side surfaces of the dielectric block.

Claims12

Dependent claims

A dielectric filter comprising:

a dielectric block disposed on a mount board, an undersurface of the dielectric block being a mounting surface;
an outer conductor on an outer surface of the dielectric block and connected to a ground on the mounting surface;
an inner conductor on an inner surface of an inner conductor formation hole that passes through the dielectric block, the inner conductor having an open end on a front surface of the dielectric block;
and
an input/output electrode separated from the outer conductor and coupled to the inner conductor,
wherein the input/output electrode includes, on the undersurface of the dielectric block, undersurface input/output electrode portions, a first of the undersurface input/output electrode portions extending from a boundary between a first side surface and the undersurface of the dielectric block to a boundary between the front surface and the undersurface of the dielectric block, and a second of the undersurface input/output electrode portions extending from a boundary between a second side surface and the undersurface of the dielectric block to the boundary between the front surface and the undersurface of the dielectric block, and
wherein the outer conductor includes, on the undersurface of the dielectric block, undersurface electrode corner portions, a first undersurface electrode corner portion disposed at a first corner formed by the front surface and the first side surface of the dielectric block and a second undersurface electrode corner portion disposed at a second corner formed by the front surface and the second side surface of the dielectric block, and an undersurface electrode main portion disposed between the undersurface electrode corner portions and is separated from the undersurface input/output electrode portions.

4 more elements

A dielectric filter comprising:

a dielectric block having an outer surface, the outer surface including opposed top and bottom surfaces, opposed first and second side surfaces, and a front surface;
an outer conductor on the outer surface of the dielectric block;
a plurality of inner conductor holes in the dielectric block, each of the plurality of inner conductor holes having an open end on the front surface of the dielectric block;
a first input/output electrode on the bottom surface of the dielectric block, the first input/output electrode being separated from the outer conductor and coupled to a first inner conductor hole of the plurality of inner conductor holes, the first input/output electrode being shaped so as to curve from a first boundary between the first side surface and the bottom surface of the dielectric block to a second boundary between the front surface and the bottom surface of the dielectric block;
a second input/output electrode on the bottom surface of the dielectric block, the second input/output electrode being separated from the outer conductor and coupled to a second inner conductor hole of the plurality of inner conductor holes, the second input/output electrode being shaped so as to curve from a third boundary between the second side surface and the bottom surface of the dielectric block to the second boundary between the front surface and the bottom surface of the dielectric block;
a first electrode corner portion on the bottom surface of the dielectric block at a first corner between the front surface and the first side surface of the dielectric block;
a second electrode corner portion on the bottom surface of the dielectric block at a second corner between the front surface and the second side surface of the dielectric block;
and
an electrode main portion on the bottom surface of the dielectric block between the first and second electrode corner portions and separated from the first and second input/output electrodes.

6 more elements

Dependencies are inferred from the claim text.