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US 12,512,805 B2Granted
Branching filter
AssigneeTDK Corporation
InventorTakuya Sato
Life of this patent
Estimating the term…
Abstract
A branching filter includes a first filter and a second filter. The first filter includes a first inductor. The second filter includes a second inductor. Each of the first inductor and the second inductor is wound about an axis extending in a direction orthogonal to a stacking direction of a stack. The first inductor is arranged at a position closer to a first end portion of the stack than to a second end portion of the stack. The second inductor is arranged at a position closer to the second end portion than to the first end portion.
Claims12
A branching filter comprising:
- a common terminal;
- a first signal terminal:
- a second signal terminal;
- a first filter, which is provided between the common terminal and the first signal terminal in a circuit configuration, that selectively passes a signal of a frequency within a first passband;
- a second filter, which is provided between the common terminal and the second signal terminal in the circuit configuration, that selectively passes a signal within a second passband higher than the first passband;
- and
- a stack, which is for integrating the common terminal, the first signal terminal, the second signal terminal, the first filter, and the second filter, that includes a plurality of dielectric layers stacked together, wherein
- each of the first filter and the second filter is an LC filter including at least one inductor and at least one capacitor,
- the first filter includes a first inductor connected, at two ends of the first inductor, to a first path connecting the common terminal and the first signal terminal,
- the second filter includes a second inductor connected, at two ends of the second inductor, to a second path connecting the common terminal and the second signal terminal,
- each of the first inductor and the second inductor is wound about an axis extending in a direction orthogonal to a stacking direction of the plurality of dielectric layers,
- the stack includes a first side surface and a second side surface located at respective two ends in a first direction orthogonal to the stacking direction, a third side surface and a fourth side surface located at respective two ends in a second direction orthogonal to the stacking direction and each connecting the first side surface and the second side surface, a first end portion located at a position where the first side surface and the third side surface intersect, and a second end portion located at a position where the second side surface and the fourth end surface intersect,
- the first inductor is arranged at a position closer to the first end portion than to the second end portion,
- the second inductor is arranged at a position closer to the second end portion than to the first end portion, and
- the branching filter further includes a third inductor provided between the common terminal, and the first filter and the second filter in the circuit configuration, and wound about an axis extending in a direction orthogonal to the stacking direction.
12 more elements
A branching filter comprising:
- a common terminal;
- a first signal terminal:
- a second signal terminal;
- a first filter, which is provided between the common terminal and the first signal terminal in a circuit configuration, that selectively passes a signal of a frequency within a first passband;
- a second filter, which is provided between the common terminal and the second signal terminal in the circuit configuration, that selectively passes a signal within a second passband higher than the first passband;
- and
- a stack, which is for integrating the common terminal, the first signal terminal, the second signal terminal, the first filter, and the second filter, that includes a plurality of dielectric layers stacked together, wherein
- each of the first filter and the second filter is an LC filter including at least one inductor and at least one capacitor,
- the first filter includes a first inductor connected, at two ends of the first inductor, to a first path connecting the common terminal and the first signal terminal,
- the second filter includes a second inductor connected, at two ends of the second inductor, to a second path connecting the common terminal and the second signal terminal,
- each of the first inductor and the second inductor is wound about an axis extending in a direction orthogonal to a stacking direction of the plurality of dielectric layers,
- the stack includes a first side surface and a second side surface located at respective two ends in a first direction orthogonal to the stacking direction, a third side surface and a fourth side surface located at respective two ends in a second direction orthogonal to the stacking direction and each connecting the first side surface and the second side surface, a first end portion located at a position where the first side surface and the third side surface intersect, and a second end portion located at a position where the second side surface and the fourth end surface intersect,
- the first inductor is arranged at a position closer to the first end portion than to the second end portion,
- the second inductor is arranged at a position closer to the second end portion than to the first end portion,
- the first inductor is wound about a first axis,
- the second inductor is wound about a second axis, and
- the first axis and the second axis are parallel to each other.
14 more elements
A branching filter comprising:
- a common terminal;
- a first signal terminal:
- a second signal terminal;
- a first filter, which is provided between the common terminal and the first signal terminal in a circuit configuration, that selectively passes a signal of a frequency within a first passband;
- a second filter, which is provided between the common terminal and the second signal terminal in the circuit configuration, that selectively passes a signal within a second passband higher than the first passband;
- and
- a stack, which is for integrating the common terminal, the first signal terminal, the second signal terminal, the first filter, and the second filter, that includes a plurality of dielectric layers stacked together, wherein
- each of the first filter and the second filter is an LC filter including at least one inductor and at least one capacitor,
- the first filter includes a first inductor connected, at two ends of the first inductor, to a first path connecting the common terminal and the first signal terminal,
- the second filter includes a second inductor connected, at two ends of the second inductor, to a second path connecting the common terminal and the second signal terminal,
- each of the first inductor and the second inductor is wound about an axis extending in a direction orthogonal to a stacking direction of the plurality of dielectric layers,
- the stack includes a first side surface and a second side surface located at respective two ends in a first direction orthogonal to the stacking direction, a third side surface and a fourth side surface located at respective two ends in a second direction orthogonal to the stacking direction and each connecting the first side surface and the second side surface, a first end portion located at a position where the first side surface and the third side surface intersect, and a second end portion located at a position where the second side surface and the fourth end surface intersect,
- the first inductor is arranged at a position closer to the first end portion than to the second end portion,
- the second inductor is arranged at a position closer to the second end portion than to the first end portion, and
- the number of windings of each of the first inductor and the second inductor is ¾ or more.
12 more elements
Dependencies are inferred from the claim text.