Multilayer filter
First Claim
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1. A multilayer filter comprising:
- a plurality of dielectric layers;
a first LC parallel resonator including a first inductor and a first capacitor;
a second LC parallel resonator including a second inductor and a second capacitor; and
an LC series resonator including third, fourth and fifth capacitors, and a third inductor including one end connected to a ground point;
whereinthe plurality of dielectric layers include;
a first inductor layer in which the first inductor and the second inductor are provided;
a second inductor layer in which the third inductor is provided; and
a capacitor layer in which the first, second, third, fourth and fifth capacitors are provided and that is located between the first inductor layer and the second inductor layer;
at least one of a first air-core portion defined by the first inductor and a second air-core portion defined by the second inductor includes, in a region from the first inductor layer to the second inductor layer in a stacking direction of the plurality of dielectric layers, a region enabling magnetic flux to pass therethrough without being obstructed by the first, second, third, fourth and fifth capacitors and the third inductor;
the multilayer filter includes a shield electrode that covers at least a portion of one of side surfaces of the multilayer filter extending in the stacking direction; and
the third inductor is connected to the shield electrode at side surfaces of the second inductor layer extending in the stacking direction.
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Abstract
A multilayer filter includes dielectric layers, a first terminal, a second terminal, a first inductor, a second inductor, and first to fifth capacitors. In a stacking direction of the dielectric layers, at least one of a first air-core portion defined by the first inductor and a second air-core portion defined by the second inductor includes, in a region from the first inductor layer to the second inductor layer, a region enabling magnetic flux to pass therethrough without being obstructed by the first to fifth capacitors and the third inductor.
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Citations
11 Claims
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1. A multilayer filter comprising:
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a plurality of dielectric layers; a first LC parallel resonator including a first inductor and a first capacitor; a second LC parallel resonator including a second inductor and a second capacitor; and an LC series resonator including third, fourth and fifth capacitors, and a third inductor including one end connected to a ground point;
whereinthe plurality of dielectric layers include; a first inductor layer in which the first inductor and the second inductor are provided; a second inductor layer in which the third inductor is provided; and a capacitor layer in which the first, second, third, fourth and fifth capacitors are provided and that is located between the first inductor layer and the second inductor layer; at least one of a first air-core portion defined by the first inductor and a second air-core portion defined by the second inductor includes, in a region from the first inductor layer to the second inductor layer in a stacking direction of the plurality of dielectric layers, a region enabling magnetic flux to pass therethrough without being obstructed by the first, second, third, fourth and fifth capacitors and the third inductor; the multilayer filter includes a shield electrode that covers at least a portion of one of side surfaces of the multilayer filter extending in the stacking direction; and the third inductor is connected to the shield electrode at side surfaces of the second inductor layer extending in the stacking direction. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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Specification