Filter device, radio-frequency front-end circuit, and communication apparatus

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United States of America Patent

PATENT NO 11843367
APP PUB NO 20200366272A1
SERIAL NO

16984158

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Abstract

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A filter device according to an embodiment of the present disclosure includes a first filter and a second filter that are connected in parallel between a first terminal and a second terminal. The first filter includes multiple series arm resonators. The series arm resonators are disposed in series in a path from the first terminal via the first filter to the second terminal. The series arm resonators include a first series arm resonator and a second series arm resonator. Under a condition that a value obtained by dividing a difference between an antiresonance frequency and a resonance frequency of each series arm resonator by the resonance frequency is defined as a fractional bandwidth, a first fractional bandwidth of the first series arm resonator is different from a second fractional bandwidth of the second series arm resonator.

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Patent Owner(s)

Patent OwnerAddress
MURATA MANUFACTURING CO LTDKYOTO JAPAN KYOTO

International Classification(s)

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Nosaka, Koji Nagaokakyo, JP 73 519

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