公开(公告)号：US20200343932A1

公开(公告)日：2020-10-29

申请号：US16853817

申请日：2020-04-21

Applicant: Murata Manufacturing Co., Ltd.

Inventor： Hitoshi AKAMINE ,  Satoshi SAKURAI

IPC: H04B1/44

Abstract: A radio-frequency signal sending/receiving circuit includes a low-noise amplifier electrically connected to a first terminal, a first switch electrically connected to the input terminal of the low-noise amplifier, a band pass filter electrically connected at one end to the other end of the first switch and at the other end to a first antenna via a fourth terminal, a power amplifier electrically connected to a second terminal, a second switch electrically connected at one end to the output terminal of the power amplifier and at the other end to the band pass filter, a third switch electrically connected at one end to the output terminal of the power amplifier and at the other end to a fifth terminal, and a fourth switch electrically connected at one end to a third terminal and at the other end to the fifth terminal.

公开(公告)号：US20220021350A1

公开(公告)日：2022-01-20

申请号：US17376780

申请日：2021-07-15

Applicant: Murata Manufacturing Co., Ltd.

Inventor： Masatoshi HASE ,  Hitoshi AKAMINE

IPC: H03F1/42 ,  H03F3/24

Abstract: A power amplifier module includes a first amplifier that amplifies a power level of a first input signal in a predetermined frequency band and outputs a first signal of a first power level; a first impedance transformer connected to the first amplifier and including a transmission line transformer; a second amplifier that amplifies a power level of a second input signal in the predetermined frequency band and outputs a second signal of the first power level; a second impedance transformer connected to the second amplifier and including a transmission line transformer; and a combiner that combines the first signal inputted through the first impedance transformer and the second signal inputted through the second impedance transformer into an output signal of a second power level larger than the first power level and includes a transmission line transformer.

公开(公告)号：US20220182025A1

公开(公告)日：2022-06-09

申请号：US17457290

申请日：2021-12-02

Applicant: Murata Manufacturing Co., Ltd.

Inventor： Hitoshi AKAMINE ,  Masatoshi HASE

IPC: H03F3/24 ,  H04B1/04 ,  H03F1/56 ,  H03F3/195

Abstract: An output matching circuit includes: a converter electrically connected to an output end of a power amplifier element to convert an impedance of the output end to an impedance higher than the impedance of the output end by magnetic coupling; and a first filter circuit electrically connected between the output end of the power amplifier element and the converter to make a short circuit in a frequency band different from a predetermined transmission frequency band.

公开(公告)号：US20210250058A1

公开(公告)日：2021-08-12

申请号：US17241809

申请日：2021-04-27

Applicant: Murata Manufacturing Co., Ltd.

Inventor： Hitoshi AKAMINE ,  Satoshi SAKURAI

IPC: H04B1/44

Abstract: A radio-frequency signal sending/receiving circuit includes a low-noise amplifier electrically connected to a first terminal, a first switch electrically connected to the input terminal of the low-noise amplifier, a band pass filter electrically connected at one end to the other end of the first switch and at the other end to a first antenna via a fourth terminal, a power amplifier electrically connected to a second terminal, a second switch electrically connected at one end to the output terminal of the power amplifier and at the other end to the band pass filter, a third switch electrically connected at one end to the output terminal of the power amplifier and at the other end to a fifth terminal, and a fourth switch electrically connected at one end to a third terminal and at the other end to the fifth terminal.