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US 10,110,193 B2Granted
Low pass filter
AssigneeMurata Manufacturing Co., Ltd.
InventorHiroshi Masuda
Life of this patent
Estimating the term…
Abstract
A low pass filter includes a first via-hole conductor connected to a first end portion of a first inductor and a third end portion of a second inductor and extending to another side in a lamination direction with respect to a second end portion of the first inductor and a fourth end portion of the second inductor, and a first capacitor electrically connected in parallel with at least a portion of the first inductor and a portion of the second inductor and defined by a first capacitor conductor layer. The low pass filter allows the interval between attenuation poles to be easily adjusted.
Claims20
A low pass filter comprising:
- a multilayer body including a plurality of insulator layers laminated in a lamination direction;
- a first LC parallel resonator including a first inductor including a first end portion at a first side in the lamination direction and a second end portion at a second side in the lamination direction, the first inductor having a helical shape turning around while extending in the lamination direction;
- a second LC parallel resonator including a second inductor including a third end portion at the first side in the lamination direction and a fourth end portion at the second side in the lamination direction, the second inductor including a helical shape turning around while extending in the lamination direction, the second LC parallel resonator being electrically connected in series with the first LC parallel resonator;
- a first via-hole conductor connected to the first end portion of the first inductor and the third end portion of the second inductor and extending to the second side in the lamination direction with respect to the second end portion of the first inductor and the fourth end portion of the second inductor;
- and
- a first capacitor electrically connected in parallel with at least a portion of the first inductor and a portion of the second inductor and defined by a first capacitor conductor layer;
- wherein
- the first LC parallel resonator further includes a third capacitor electrically connected in parallel with the first inductor;
- and
- the first capacitor conductor layer is electrically connected between the second end portion of the first inductor and the third capacitor, and overlaps the second inductor when seen in a plan view from the lamination direction.
7 more elements
A low pass filter comprising:
- a multilayer body including a plurality of insulator layers laminated in a lamination direction;
- a first LC parallel resonator including a first inductor including a first end portion at a first side in the lamination direction and a second end portion at a second side in the lamination direction, the first inductor having a helical shape turning around while extending in the lamination direction;
- a second LC parallel resonator including a second inductor including a third end portion at the first side in the lamination direction and a fourth end portion at the second side in the lamination direction, the second inductor including a helical shape turning around while extending in the lamination direction, the second LC parallel resonator being electrically connected in series with the first LC parallel resonator;
- a first via-hole conductor connected to the first end portion of the first inductor and the third end portion of the second inductor and extending to the second side in the lamination direction with respect to the second end portion of the first inductor and the fourth end portion of the second inductor;
- and
- a first capacitor electrically connected in parallel with at least a portion of the first inductor and a portion of the second inductor and defined by a first capacitor conductor layer;
- wherein
- the first capacitor conductor layer is electrically connected only to the first inductor, and overlaps the second inductor when seen in a plan view from the lamination direction.
5 more elements
A low pass filter comprising:
- a multilayer body including a plurality of insulator layers laminated in a lamination direction;
- a first LC parallel resonator including a first inductor including a first end portion at a first side in the lamination direction and a second end portion at a second side in the lamination direction, the first inductor having a helical shape turning around while extending in the lamination direction;
- a second LC parallel resonator including a second inductor including a third end portion at the first side in the lamination direction and a fourth end portion at the second side in the lamination direction, the second inductor including a helical shape turning around while extending in the lamination direction, the second LC parallel resonator being electrically connected in series with the first LC parallel resonator;
- a first via-hole conductor connected to the first end portion of the first inductor and the third end portion of the second inductor and extending to the second side in the lamination direction with respect to the second end portion of the first inductor and the fourth end portion of the second inductor;
- and
- a first capacitor electrically connected in parallel with at least a portion of the first inductor and a portion of the second inductor and defined by a first capacitor conductor layer;
- wherein
- the first capacitor conductor layer overlaps the first inductor and the second inductor when seen in a plan view from the lamination direction.
5 more elements
Dependencies are inferred from the claim text.