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US 12,494,760 B2Granted
Filter device, antenna device, and antenna module
AssigneeMurata Manufacturing Co., Ltd.
InventorShinya Tachibana
Life of this patent
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Abstract
A filter device includes first and second terminals, a first inductor located between the first and second terminals, and an LC series resonator connected in parallel to the first inductor and including a first capacitor and a second inductor. The first and second inductors are magnetically coupled to each other. An inductance of the first inductor is smaller than an inductance of the second inductor.
Claims20
A filter device with a first frequency band as a pass band and a second frequency band as an attenuation band, the second frequency band being lower than the first frequency band, the filter device comprising:
- a first terminal;
- a second terminal;
- a first inductor connecting the first terminal to the second terminal;
- and
- an LC series resonator connected in parallel to the first inductor and including a first capacitor and a second inductor;
- wherein
- the first inductor and the second inductor are magnetically coupled to each other;
- an inductance of the first inductor is smaller than an inductance of the second inductor;
- the first terminal is an input terminal;
- the second terminal is an output terminal;
- and
- the filter device is an integrated component.
9 more elements
Dependencies are inferred from the claim text.