Filter device
AssigneeMurata Manufacturing Co., Ltd.
InventorRyo Mikase
Life of this patent
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Abstract
A filter device applied to a radio-frequency circuit includes a dielectric substrate on which a ground electrode is disposed and a main line which has an input end and an output end. The filter device also includes first and second resonators and an intermediate resonator. The main line is disposed to face the ground electrode and extends in a first direction. The first resonator intersects the main line and extends in a second direction. The second resonator intersects the main line and extends in the second direction in a region further to an output end side than the first resonator. At least part of the intermediate resonator is disposed between the first resonator and the second resonator.
Claims19
A filter device applied to a radio-frequency circuit, the filter device comprising:
- a dielectric substrate on which a first ground electrode is disposed;
- a main line which is disposed to face the first ground electrode, which extends in a first direction, and which has an input end and an output end;
- a first resonator which intersects the main line and which extends in a second direction;
- a second resonator which intersects the main line and extends in the second direction in a region closer to an output end side than the first resonator;
- and
- an intermediate resonator at least part of which is disposed between the first resonator and the second resonator,
- wherein the intermediate resonator is not coupled to the main line.
Dependencies are inferred from the claim text.