公开(公告)号：US20180302059A1

公开(公告)日：2018-10-18

申请号：US16015347

申请日：2018-06-22

Applicant: Murata Manufacturing Co., Ltd.

Inventor： Toru EIHAMA

IPC: H03H7/46 ,  H03H9/46 ,  H03H7/38 ,  H05K1/18

CPC classification number: H03H7/461 ,  H01P1/2135 ,  H03H7/38 ,  H03H7/463 ,  H03H9/0542 ,  H03H9/0557 ,  H03H9/0576 ,  H03H9/46 ,  H05K1/025 ,  H05K1/165 ,  H05K1/185 ,  H05K2201/1006 ,  H05K2201/10083

Abstract: A multiplexer includes a first filter, a second filter, a combining wiring line that provides a combination point at which an input or an output of each of the first filter and the second filter is connected to each other, an antenna terminal to connect the multiplexer to an antenna, an antenna wiring line connected at one end to the antenna terminal and connected at the other end to the combining wiring line, a matching terminal to which a matching inductor to provide matching between the antenna and the multiplexer is to be connected, and a matching wiring line to be connected at one end to the matching terminal and connected at the other end to the combining wiring line.

公开(公告)号：US20190296714A1

公开(公告)日：2019-09-26

申请号：US16435619

申请日：2019-06-10

Applicant: Murata Manufacturing Co., Ltd.

Inventor： Toru EIHAMA

IPC: H03H9/145 ,  H03H9/72 ,  H03H9/64 ,  H03H9/02

Abstract: A surface acoustic wave resonator includes first and second surface acoustic wave resonator connected in series, and a third surface acoustic wave resonator connected in series with the second surface acoustic wave resonator. Each of the first to third surface acoustic wave resonators includes a pair of comb-shaped electrodes in which electrode fingers of one of the comb-shaped electrodes and electrode fingers of the other one of the comb-shaped electrodes are alternately arranged. The second surface acoustic wave resonator has a lower ratio of a width of the electrode fingers to a pitch between the electrode fingers than the first and third surface acoustic wave resonators.