公开(公告)号：US20210057822A1

公开(公告)日：2021-02-25

申请号：US16978490

申请日：2019-03-04

Applicant: TORAY INDUSTRIES, INC.

Inventor： Yoshihiro KARIYA ,  Kenta NOGUCHI ,  Hiroji SHIMIZU ,  Seiichiro MURASE ,  Hisashi NISHIKAWA

IPC: H01Q7/00 ,  H04B1/59 ,  H04B5/00 ,  H01Q1/22 ,  H04B5/02

Abstract: A wireless communication device includes: an antenna for transmitting and receiving a radio wave, a rectifying circuit that is connected to the antenna and rectifies the radio wave received by the antenna to generate voltage, an internal circuit that operates by the voltage generated by the rectifying circuit, and a switch circuit that is disposed contactlessly with respect to the antenna and operates on the basis of an output signal of the internal circuit, wherein the switch circuit includes a coupling wiring and a switch element, and the operation of the switch element varies the impedance of the antenna so that communication can be carried out.