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US 12,512,815 B2Granted
Filter device and high-frequency front-end circuit provided with the same
AssigneeMurata Manufacturing Co., Ltd.
InventorKeisuke Ogawa
Life of this patent
Estimating the term…
Abstract
A filter device includes a main body, an input terminal, an output terminal, a ground terminal, and resonators. The resonators are located in the main body and are electro-magnetically coupled with each other so as to transmit a signal from the input terminal to the output terminal. Each of the resonators includes a first path connected from nodes via capacitors to the ground terminal, and a second path connected from the nodes to the ground terminal without passing through the capacitors. The second path of a first resonator and the second path of a second resonator are partially shared. The filter device further includes a third path connected with the node of the first resonator and the node of the second resonator.
Claims20
A filter device comprising:
- a main body;
- an input terminal;
- an output terminal;
- a ground terminal;
- a ground electrode that is connected with the ground terminal;
- and
- a common via that is connected with the ground electrode;
- a first resonator and a second resonator that are located in the main body and are electro-magnetically coupled with each other so as to transmit a signal from the input terminal to the output terminal;
- wherein
- each of the first resonator and the second resonator includes:
- a first path that is connected from a first node via a capacitor to the ground terminal;
- and
- a second path that is connected from the first node to the ground terminal without passing through a capacitor;
- the second path of the first resonator and the second path of the second resonator are partially shared;
- the filter device further includes a third path that is connected with the first node of the first resonator and the first node of the second resonator;
- the first resonator includes:
- a first capacitor electrode opposed to the ground electrode;
- a first via that is connected with the first capacitor electrode;
- and
- a first plate electrode that is connected with the first via and the common via;
- the second resonator includes:
- a second capacitor electrode opposed to the ground electrode;
- a second via that is connected with the second capacitor electrode;
- and
- a second plate electrode that is connected with the second via and the common via;
- and
- the filter device further includes a third plate electrode that is connected with the first via and the second via.
24 more elements
A filter device comprising:
- a main body including a plurality of dielectric layers that are laminated;
- an input terminal;
- an output terminal;
- a ground terminal;
- a ground electrode that is connected with the ground terminal;
- a common electrode that is located on a different dielectric layer from that of the ground electrode;
- and
- a common via that is connected with the ground electrode and the common electrode;
- a first resonator and a second resonator that are located in the main body and are electro-magnetically coupled with each other so as to transmit a signal from the input terminal to the output terminal;
- wherein
- each of the first resonator and the second resonator includes:
- a first path that is connected from a first node via a capacitor to the ground terminal;
- and
- a second path that is connected from the first node to the ground terminal without passing through a capacitor;
- the second path of the first resonator and the second path of the second resonator are partially shared;
- the filter device further includes a third path that is connected with the first node of the first resonator and the first node of the second resonator;
- the first resonator includes:
- a third capacitor electrode that is opposed to the ground electrode;
- a third via that is connected with the third capacitor electrode;
- and
- a fourth plate electrode that is connected with the third via and the fourth via;
- the second resonator includes:
- a fourth capacitor electrode that is opposed to the ground electrode;
- a fifth via that is connected with the fourth capacitor electrode;
- a sixth via that is connected with the common electrode;
- and
- a fifth plate electrode that is connected with the fifth via and the sixth via;
- and
- the filter device further includes a sixth plate electrode that connects the third via and the fifth via with each other.
26 more elements
A filter device comprising:
- an input terminal;
- an output terminal;
- a ground terminal;
- and
- a first resonator and a second resonator that are electro-magnetically coupled with each other so as to transmit a signal from the input terminal to the output terminal;
- wherein
- the first resonator includes:
- a first capacitor that is connected between a first node and the ground terminal;
- a first inductor including a first end that is connected to the first node;
- a second inductor that is connected with a second end of the first inductor;
- and
- a common inductor that is connected between the second end of the second inductor and the ground terminal;
- the second resonator includes:
- a second capacitor that is connected between a second node and the ground terminal;
- a third inductor including a first end that is connected to the second node;
- and
- a fourth inductor that is connected between a second end of the third inductor and the common inductor;
- and
- the filter device further includes a fifth inductor that is connected between the second end of the first inductor and the second end of the third inductor.
16 more elements
A filter device comprising:
- a main body;
- an input terminal;
- an output terminal;
- a ground terminal;
- and
- a fifth resonator and a sixth resonator that are located in the main body and are electro-magnetically coupled with each other so as to transmit a signal from the input terminal to the output terminal;
- wherein
- the fifth resonator includes:
- a third capacitor that is connected between a third node and the input terminal;
- a sixth inductor including a first end that is connected to the third node;
- a seventh inductor that is connected with a second end of the sixth inductor;
- and
- a common inductor that is connected between the second end of the seventh inductor and the ground terminal;
- the sixth resonator includes:
- a fourth capacitor that is connected between the output terminal and the ground terminal;
- an eighth inductor including a first end that is connected to the output terminal;
- and
- a ninth inductor that is connected between a second end of the eighth inductor and the common inductor;
- and
- the filter device further includes a tenth inductor that is connected between the second end of the sixth inductor and the second end of the eighth inductor.
17 more elements
A filter device comprising:
- a main body;
- an input terminal;
- an output terminal;
- a ground terminal;
- and
- a fifth resonator and a seventh resonator that are located in the main body and are electro-magnetically coupled with each other so as to transmit a signal from the input terminal to the output terminal;
- wherein
- the fifth resonator includes:
- a third capacitor that is connected between a third node and the input terminal;
- a sixth inductor including a first end that is connected to the third node;
- a seventh inductor that is connected with a second end of the sixth inductor;
- and
- a common inductor that is connected between the second end of the seventh inductor and the ground terminal;
- the seventh resonator includes:
- a sixth capacitor that is connected between a fourth node and the output terminal;
- an eighth inductor including a first end that is connected to the fourth node;
- and
- a ninth inductor that is connected between a second end of the eighth inductor and the common inductor;
- and
- the filter device further includes a tenth inductor that is connected between the second end of the sixth inductor and the second end of the eighth inductor.
17 more elements
Dependencies are inferred from the claim text.