High-frequency front-end circuit

A high-frequency front-end circuit includes a first variable filter and a second variable filter. One end of each of the variable filters is connected to a common terminal. The other end of the first variable filter is connected to a transmission individual terminal and the other end of the second v...

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Bibliographic Details
Main Authors OBIYA HIDENORI, HAYAFUJI HISAO, MIZOGUCHI SHINYA
Format Patent
LanguageEnglish
Published 15.03.2016
Subjects
ELECTRIC COMMUNICATION TECHNIQUE
ELECTRICITY
TRANSMISSION
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Summary:A high-frequency front-end circuit includes a first variable filter and a second variable filter. One end of each of the variable filters is connected to a common terminal. The other end of the first variable filter is connected to a transmission individual terminal and the other end of the second variable filter is connected to a reception individual terminal. At the time of transmission of a transmission signal, the impedance of the second variable filter is adjusted such that the impedance seen on the second variable filter side from a connection point between the variable filters is open. At the time of transmission of a reception signal, the impedance of the first variable filter is adjusted such that the impedance seen on the first variable filter side from a connection point between the variable filters is open.
Bibliography:Application Number: US201314050406