公开(公告)号：US20250055487A1

公开(公告)日：2025-02-13

申请号：US18929659

申请日：2024-10-29

Applicant: Murata Manufacturing Co., Ltd.

Inventor： Yuusuke SUZUKI ,  Masateru HIGASHI ,  Takumi FUKUNAGA

IPC: H04B1/00 ,  H04B1/04

Abstract: A radio frequency circuit includes a switch having selection terminals, a switch, a filter connected to the selection terminal, a filter connected to the selection terminal, and a filter. The switch is connected in series to and between the filter and a path connecting the selection terminal and the filter.

公开(公告)号：US20250038773A1

公开(公告)日：2025-01-30

申请号：US18910105

申请日：2024-10-09

Applicant: Murata Manufacturing Co., Ltd.

Inventor： Hiroyuki KANI ,  Yoshihiro YOSHIMURA ,  Kiyoshi AIKAWA ,  Takahiro YAMASHITA ,  Yuusuke SUZUKI ,  Hidetaka TAKAHASHI ,  Takanori ITO ,  Takuma KUROYANAGI

IPC: H04B1/00 ,  H03H9/64 ,  H04B1/16

Abstract: A radio frequency module includes a mounting board, a first acoustic wave filter including a first support disposed at a first main surface of the mounting board, a second acoustic wave filter including a second support disposed on the first acoustic wave filter, and a shield electrode. The shield electrode covers at least a part of the resin layer. The first acoustic wave filter and the second acoustic wave filter pass signals to perform simultaneous communication. A main surface of the second acoustic wave filter on an opposite side from a first acoustic wave filter side is in contact with the shield electrode. A ground electrode of the mounting board is connected to a functional electrode of the first acoustic wave filter.

公开(公告)号：US20250007496A1

公开(公告)日：2025-01-02

申请号：US18826217

申请日：2024-09-06

Applicant: Murata Manufacturing Co., Ltd.

Inventor： Takuma KUROYANAGI ,  Yoshihiro YOSHIMURA ,  Kiyoshi AIKAWA ,  Takahiro YAMASHITA ,  Yuusuke SUZUKI

IPC: H03H9/64 ,  H03H9/13 ,  H03H9/145 ,  H03H9/22 ,  H03H9/25 ,  H03H9/56

Abstract: An acoustic wave device includes a first transmission filter; and a second transmission filter stacked on the first transmission filter so that a first functional surface of the first transmission filter and a second functional surface of the second transmission filter face each other at a predetermined distance. The first transmission filter includes a first input terminal and a first acoustic wave resonator. The second transmission filter includes a second input terminal and a second acoustic wave resonator. The first acoustic wave resonator includes a first functional electrode formed on the first functional surface. The second acoustic wave resonator includes a second functional electrode formed on the second functional surface. In a plan view along a thickness direction of the first and second transmission filters, a first formation region of the first functional electrode and a second formation region of the second functional electrode do not overlap each other.

公开(公告)号：US20230171079A1

公开(公告)日：2023-06-01

申请号：US18159196

申请日：2023-01-25

Applicant: Murata Manufacturing Co., Ltd.

Inventor： Yuusuke SUZUKI ,  Takanori UEJIMA ,  Masanari MIURA ,  Jun TAKAHARA ,  Naoya MATSUMOTO

IPC: H04L5/14 ,  H04B1/40

CPC classification number: H04L5/1461 ,  H04B1/40

Abstract: A radio frequency module, capable of simultaneously transporting a transmission signal in a communication band B for TDD and a reception signal in a communication band A for FDD, includes a filter connected to an antenna connection terminal and having a pass band, the communication band B, a filter connected to the antenna connection terminal and having a pass band, a reception band of the communication band A, a switch to change over between the filter and a transmission input terminal to receive a transmission signal in the communication band B from an outside and the filter and a reception output terminal to supply a reception signal in the communication band B to the outside, and a band elimination filter connected between the transmission input terminal and the switch and having a stop band including the reception band of the communication band A.

公开(公告)号：US20230155612A1

公开(公告)日：2023-05-18

申请号：US18154947

申请日：2023-01-16

Applicant: Murata Manufacturing Co., Ltd.

Inventor： Yuusuke SUZUKI ,  Takanori UEJIMA ,  Masanari MIURA ,  Jun TAKAHARA ,  Naoya MATSUMOTO

IPC: H04B1/04 ,  H04B1/18

CPC classification number: H04B1/04 ,  H04B1/18 ,  H04B2001/0408

Abstract: A radio frequency module includes: a radio frequency input terminal for receiving an amplified transmission signal from the outside; radio frequency output terminals for supplying a reception signal to the outside; a filter connected between the radio frequency input terminal/the radio frequency output terminal and an antenna connection terminal, and having a passband including communication band D for TDD; and a filter connected between the radio frequency output terminal and the antenna connection terminal and having a passband including at least part of communication band A allowed for simultaneous communication with communication band D. The radio frequency input terminal is arranged in a region extending along a side of the module substrate, and the radio frequency output terminal is arranged in a region extending along a side facing the side of the module substrate.