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    SWITCHABLE COIL AND TRANSMIT CIRCUIT INCLUDING THE SAME
    1.
    发明公开
    SWITCHABLE COIL AND TRANSMIT CIRCUIT INCLUDING THE SAME 审中-公开

    公开(公告)号：EP4513517A1

    公开(公告)日：2025-02-26

    申请号：EP24194136.8

    申请日：2024-08-12

    Applicant: SAMSUNG ELECTRONICS CO., LTD.

    Inventor： LEE, Wooseok ,  YOO, Sangmin ,  BAE, Jeongyeol ,  LEE, Jongsoo ,  KIM, Soyeon

    IPC: H01F21/12 ,  H03H7/00

    Abstract: A switchable coil includes a first coil (110) including a first outer coil (OC1) and a first inner coil (IC1), the first inner coil and the first outer coil forming a first crossing-region, a second coil (120) including a second outer coil (OC2) and a second inner coil (IC2), the second inner coil and the second outer coil forming a second crossing-region, and the second crossing-region being inside the first inner coil viewed in a first direction, and a switch (SW) connected to a region facing the second crossing-region in the second inner coil.

    SURFACE ACOUSTIC WAVE RESONATOR AND SURFACE ACOUSTIC WAVE FILTER
    2.
    发明公开
    SURFACE ACOUSTIC WAVE RESONATOR AND SURFACE ACOUSTIC WAVE FILTER 审中-公开

    公开(公告)号：EP4507195A1

    公开(公告)日：2025-02-12

    申请号：EP23784063.2

    申请日：2023-01-06

    Applicant: Zhejiang Starshine Semiconductor Co., Ltd.

    Inventor： LIU, Xiandong ,  GAO, Anming ,  JIANG, Wei ,  ZHANG, Haili

    IPC: H03H9/25

    Abstract: The present application provides a surface acoustic wave resonator and a surface acoustic wave filter. The surface acoustic wave resonator comprises interdigital electrodes; each interdigital electrode comprises a first bus bar and a second bus bar which are oppositely arranged; the first bus bar is connected with a plurality of first fingers and a plurality of second false fingers which are alternately arranged in a first direction; the second bus bar is connected with a plurality of first false fingers and a plurality of second fingers which are alternately arranged in the first direction; the plurality of first fingers are in one-to-one correspondence with the plurality of first false fingers; the plurality of second fingers are in one-to-one correspondence with the plurality of second false fingers; in any two adjacent first and second fingers, a spacing between the end of the first finger away from the first bus bar and the end of the second finger away from the second bus bar is a finger aperture, a plurality of adjacent first and second fingers form a plurality of finger apertures, and at least some finger apertures in the plurality of finger apertures are different. According to the surface acoustic wave resonator, a transverse resonant mode can be reduced, and the effect of suppressing the transverse resonant mode is achieved.

    TRANSMISSION CIRCUIT AND COMPOSITE TRANSMISSION CIRCUIT
    9.
    发明公开
    TRANSMISSION CIRCUIT AND COMPOSITE TRANSMISSION CIRCUIT 审中-公开

    公开(公告)号：EP4485809A1

    公开(公告)日：2025-01-01

    申请号：EP23759645.7

    申请日：2023-02-03

    Applicant: Tokyo Institute of Technology ,  Kyocera Corporation

    Inventor： ISHIHARA, Noboru ,  TSURU, Shinsuke ,  ISOYAMA, Shinji ,  TOBA, Tatsuo

    IPC: H04B5/02 ,  H03H7/38 ,  H04B1/59

    Abstract: A transmission circuit includes a plurality of impedance circuits, each of which has a different impedance, a plurality of switch elements, any one of which is being connected to a respective one of the plurality of impedance circuits, a compensation circuit connected to a respective one of the plurality of switch elements and selectively adding a capacitance value and a resistance value to the transmission circuit, and a control circuit controlling opening/closing of the plurality of switch elements. The control circuit is controllable to selectively change the opening/closing of the plurality of switch elements and to rotate a reflection coefficient of an output terminal on an antenna side in a complex plane.

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