Filter device and duplexer

Number of patents in Portfolio can not be more than 2000

United States of America Patent

PATENT NO 9419582
APP PUB NO 20150130558A1
SERIAL NO

14606139

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ATTORNEY / AGENT: (SPONSORED)

Importance

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Abstract

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A filter device includes a band pass filter connected between a first signal terminal and a second signal terminal and an LC circuit connected in parallel with the band pass filter. The LC circuit has anti-resonant characteristics that make the LC circuit be open at a pass band of the band pass filter, and make attenuation in a specified frequency band outside of the pass band of the band pass filter higher than in a case in which the LC circuit is not connected, as a result of the LC circuit being connected.

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Patent Owner(s)

Patent OwnerAddress
MURATA MANUFACTURING CO LTD10-1 HIGASHIKOTARI 1-CHOME NAGAOKAKYO-SHI KYOTO-FU 617-8555

International Classification(s)

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Kawasaki, Koichiro Nagaokakyo, JP 39 90

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