Radio frequency front-end circuit

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United States of America Patent

PATENT NO 9960898
SERIAL NO

15235295

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Abstract

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A radio frequency front-end circuit includes a duplexer, a phase adjustment circuit, and a low noise amplifier. The phase adjustment circuit is connected between an Rx filter of the duplexer and the low noise amplifier. The phase adjustment circuit executes phase adjustment such that a quadrant in which an impedance ZLNA(fn) at a particular frequency different from a fundamental frequency of a reception signal when looking at the low noise amplifier side from the Rx filter is present and a quadrant in which an impedance ZRX(fn) at the particular frequency when looking at the Rx filter side from the low noise amplifier is present are not in a conjugate relation in terms of phase.

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Patent Owner(s)

  • MURATA MANUFACTURING CO., LTD.

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Ariumi, Saneaki Nagaokakyo, JP 12 34
Hayafuji, Hisao Nagaokakyo, JP 14 77
Kitajima, Hiromichi Nagaokakyo, JP 66 60
Tsujiguchi, Tatsuya Nagaokakyo, JP 45 290
Uejima, Takanori Nagaokakyo, JP 173 684

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