公开(公告)号：US20200244246A1

公开(公告)日：2020-07-30

申请号：US16696621

申请日：2019-11-26

Applicant: TAIYO YUDEN CO., LTD.

Inventor： Toshimasa NUMATA ,  Hitoshi EBIHARA ,  Naoto KOBAYASHI ,  Masayuki KITAJIMA

IPC: H03H9/02 ,  H03H9/145 ,  H03H9/25 ,  H03H9/76 ,  H03H9/64

Abstract: A filter includes: a piezoelectric substrate; a first acoustic wave resonator located on the piezoelectric substrate and including a pair of first reflectors including first grating electrodes and a pair of first comb-shaped electrodes that is located between the first reflectors and includes first electrode fingers; and a second acoustic wave resonator that is connected in series or parallel with the first acoustic wave resonator, is located on the piezoelectric substrate, and includes a pair of second reflectors including second grating electrodes and a pair of second comb-shaped electrodes that is located between the second reflectors and includes second electrode fingers, an average value of duty ratios of the second grating electrodes being different from an average value of duty ratios of the first grating electrodes, an average value of pitches of the second electrode fingers being substantially equal to an average value of pitches of the first electrode fingers.

公开(公告)号：US20220416763A1

公开(公告)日：2022-12-29

申请号：US17847565

申请日：2022-06-23

Applicant: TAIYO YUDEN CO., LTD.

Inventor： Makoto INOUE ,  Naoto KOBAYASHI ,  Hideyuki SEKINE ,  Jaeho JEONG

IPC: H03H9/54 ,  H03H7/01 ,  H03H9/15 ,  H03H9/70

Abstract: A filter includes an input terminal, an output terminal, a ground terminal, a first capacitor and a second capacitor that are connected in series between the input terminal and the output terminal, a capacitive element that is connected in parallel to the first capacitor and the second capacitor between the input terminal and the output terminal, and has a Q factor that is smaller than a Q factor of the first capacitor and is smaller than a Q factor of the second capacitor, and an inductor that has a first end and a second end, the first end being coupled to a node that is provided between the first capacitor and the second capacitor and that is coupled to the capacitive element through the first capacitor and the second capacitor, the second end being coupled to the ground terminal.

公开(公告)号：US20220416746A1

公开(公告)日：2022-12-29

申请号：US17847522

申请日：2022-06-23

Applicant: TAIYO YUDEN CO., LTD.

Inventor： Makoto INOUE ,  Jaeho JEONG ,  Hideyuki SEKINE ,  Naoto KOBAYASHI

IPC: H03H7/01 ,  H03H7/46

Abstract: A filter includes an input terminal, an output terminal, a first ground terminal, a second ground terminal, a first inductor having a first end coupled to a first node in a path between the input terminal and the output terminal and a second end coupled to a second node, a second inductor having a first end coupled to the second node and a second end coupled to the first ground terminal, and a third inductor having a first end coupled to the second node and a second end coupled to the second ground terminal.

公开(公告)号：US20170094662A1

公开(公告)日：2017-03-30

申请号：US15204759

申请日：2016-07-07

Applicant: TAIYO YUDEN CO., LTD.

Inventor： Hitoshi EBIHARA ,  Naoto KOBAYASHI

IPC: H04W72/04 ,  H04L5/14

CPC classification number: H04W72/0453 ,  H03H7/00 ,  H03H7/463 ,  H04L5/0007 ,  H04L5/14

Abstract: A module includes: a first diplexer including a common terminal coupled to a first antenna, a first terminal, and a second terminal; a first duplexer including a common terminal coupled to the first terminal of the first diplexer and allowing transmission and a reception signals of a first band to pass therethrough; a second duplexer including a common terminal coupled to the second terminal of the first diplexer and allowing transmission and reception signals of a second band of which a frequency band is higher than a frequency band of the first band to pass therethrough; and a third duplexer including a common terminal coupled to a second antenna different from the first antenna and allowing transmission and reception signals of a third band of which a frequency band is between the frequency band of the first band and the frequency band of the second band to pass therethrough.

公开(公告)号：US20170093554A1

公开(公告)日：2017-03-30

申请号：US15270947

申请日：2016-09-20

Applicant: TAIYO YUDEN CO., LTD.

Inventor： Hitoshi EBIHARA ,  Naoto KOBAYASHI

IPC: H04L5/14 ,  H04L12/947

CPC classification number: H04L5/1461 ,  H04L5/14 ,  H04L49/25 ,  H04W84/12

Abstract: A module includes: a first filter connected between an antenna terminal and a first terminal and allowing a signal in a first frequency band from 2.4 to 2.5 GHz to pass therethrough; a second filter connected between the antenna terminal and a second terminal and allowing a signal in a second frequency band from 5.0 to 6.0 GHz to pass therethrough; a switch selecting and connecting a first or second port to the antenna; a third filter connected between the first port and a third terminal and allowing a signal in a third frequency band between the first and second frequency bands to pass therethrough; and a fourth filter connected between the second port and a fourth terminal and allowing a signal in a fourth frequency band that is between the first and second frequency bands and partially overlaps or is continuous with the third frequency band to pass therethrough.