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US 10,491,181 B2Granted
High-frequency filter and high-frequency module
AssigneeMurata Manufacturing Co., Ltd.
InventorKen Kishimoto
Life of this patent
Estimating the term…
Abstract
A high-frequency filter includes a first terminal, a second terminal, a third terminal, a first inductor, a second inductor, a third inductor, and a fourth inductor. The first inductor and the second inductor are connected in series to each other between the first terminal and the second terminal. The third inductor and the fourth inductor are connected in parallel to each other between the third terminal and a node of the first inductor and the second inductor. The connection between the first inductor and the second inductor is an additive polarity connection. The connection between the third inductor and the fourth inductor is an additive polarity connection.
Claims16
A high-frequency filter comprising:
- a first terminal;
- a second terminal;
- a third terminal;
- a first inductor;
- a second inductor;
- a third inductor;
- a fourth inductor;
- a first capacitor;
- a second capacitor;
- a third capacitor;
- a fourth capacitor;
- and
- a fifth capacitor, wherein:
- the first inductor and the second inductor are connected in series to each other between the first terminal and the second terminal,
- the third inductor and the fourth inductor are connected in parallel to each other between the third terminal and a node connecting the first inductor and the second inductor,
- the connection between the first inductor and the second inductor is an additive polarity connection,
- the connection between the third inductor and the fourth inductor is an additive polarity connection,
- the first capacitor is connected between the first inductor and the first terminal,
- the second capacitor is connected between the second inductor and the second terminal,
- the third capacitor is connected between the third terminal and a node between the first capacitor and the first inductor,
- the fourth capacitor is connected between the third terminal and a node between the second capacitor and the second inductor, and
- the fifth capacitor is connected between the third terminal and a node between the third inductor and the fourth inductor.
19 more elements
A high-frequency filter comprising:
- a first terminal;
- a second terminal;
- a third terminal;
- a first inductor;
- a second inductor;
- a third inductor;
- a fourth inductor;
- a multilayer body including a plurality of dielectric layers stacked on top of each other and having a first principal surface and a second principal surface, a stacking direction being normal to the first principal surface and the second principal surface;
- and
- conductor patterns disposed in or on the multilayer body, wherein:
- the first inductor and the second inductor are connected in series to each other between the first terminal and the second terminal,
- the third inductor and the fourth inductor are connected in parallel to each other between the third terminal and a node connecting the first inductor and the second inductor,
- the connection between the first inductor and the second inductor is an additive polarity connection,
- the connection between the third inductor and the fourth inductor is an additive polarity connection,
- the first terminal, the second terminal, the third terminal, the first inductor, the second inductor, the third inductor, and the fourth inductor are constituted by the conductor patterns,
- the first terminal is disposed at a portion of the multilayer body nearer to the first principal surface than the second terminal,
- the second terminal is disposed at a portion of the multilayer body nearer to the second principal surface than the first terminal,
- the third terminal is connected to conductor patterns having a reference potential,
- a first end of the first inductor is connected to the first terminal,
- a second end of the first inductor is connected to a first end of the second inductor, a first end of the third inductor, and a first end of the fourth inductor,
- a second end of the second inductor is connected to the second terminal,
- a second end of the third inductor and a second end of the fourth inductor are connected to the conductor patterns having the reference potential,
- a direction of a magnetic flux produced by the first inductor is substantially similar to a direction of a magnetic flux produced by the second inductor, and
- a direction of a magnetic flux produced by the third inductor is substantially opposite to a direction of a magnetic flux produced by the fourth inductor.
21 more elements
Dependencies are inferred from the claim text.