High-frequency filter, front-end circuit, and communication device
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United States of America Patent
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Mar 5, 2019
Grant Date -
Jan 18, 2018
app pub date -
Sep 28, 2017
filing date -
Mar 30, 2015
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Abstract
A high-frequency filter includes a variable frequency filter, a fixed frequency filter, and switches. The variable frequency filter varies a passband in association with frequencies used in multiple communication band. The fixed frequency filter fixes a passband in association with a frequency used in a specific communication band different from the multiple communication bands. The switches are used to switch connection configuration to the variable frequency filter or the fixed frequency filter.
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