公开(公告)号：US12294338B2

公开(公告)日：2025-05-06

申请号：US17457290

申请日：2021-12-02

Applicant: Murata Manufacturing Co., Ltd.

Inventor： Hitoshi Akamine ,  Masatoshi Hase

IPC: H03F3/191 ,  H03F1/56 ,  H03F3/195 ,  H03F3/24 ,  H04B1/04

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：US11050455B2

公开(公告)日：2021-06-29

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：US11626899B2

公开(公告)日：2023-04-11

申请号：US17241809

申请日：2021-04-27

Applicant: Murata Manufacturing Co., Ltd.

Inventor： Hitoshi Akamine ,  Satoshi Sakurai

IPC: H04B1/44 ,  H04B1/40 ,  H04B1/00 ,  H04B1/401

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.