Radio-frequency front-end circuit and communication device
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United States of America Patent
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Jun 12, 2018
Issued Date -
Jan 18, 2018
app pub date -
Jul 11, 2017
filing date -
Jul 15, 2016
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Abstract
A radio-frequency front-end circuit includes a first filter that has a first pass band and is connected to an antenna common terminal, a second filter that has a second pass band and is connected to the antenna common terminal, a switch that includes a common terminal and selection terminals, the common terminal being connected to the first filter, and a third filter that is connected to one of the selection terminals and is disposed between the switch and an input/output terminal. A reflection coefficient of the first filter alone in the second pass band viewed from the antenna common terminal is larger than a reflection coefficient of the third filter alone in the second pass band viewed from the antenna common terminal.
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