Login| Sign Up| Help| Contact|

Patent Searching and Data


Title:
READING SYSTEM
Document Type and Number:
Japanese Patent JP2020137074
Kind Code:
A
Abstract:
To enable reading tag information even if there is a specific restriction in the layout of a passive tag.SOLUTION: A communication sheet 100 includes: a radiation surface which radiates a first radio wave, which is a radio wave for power supply, and receives a second radio wave which is a radio wave indicative of tag information. A reader/writer 20 reads the tag information through the communication sheet 100. A passive tag 300 includes: a dipole antenna which includes two elements extending from a feeding point to mutually opposite directions; and a control circuit which controls the dipole antenna to radiate a second radio wave, in response to the reception of a first radio wave by the dipole antenna. Upon the radiation of the first radio wave, an electric field intensity difference which is a difference between electric field intensity at one end of the dipole antenna and electric field intensity at the other end of the dipole antenna is larger than an intensity difference threshold value according to the reception sensitivity of the dipole antenna.SELECTED DRAWING: Figure 1

Inventors:
NEGISHI TAKEHITO
TOKIEDA MASATOMO
Application Number:
JP2019032072A
Publication Date:
August 31, 2020
Filing Date:
February 25, 2019
Export Citation:
Click for automatic bibliography generation   Help
Assignee:
TEIJIN LTD
International Classes:
H04B5/02; G06K7/10; G06K19/077; H01Q9/16; H01Q9/30; H01Q13/08
Domestic Patent References:
JP2012023515A2012-02-02
JP2017021806A2017-01-26
JP2016206838A2016-12-08
Foreign References:
WO2007032339A12007-03-22
Attorney, Agent or Firm:
Yuichiro Ishii
Taiji Morikawa
Yukio Watanabe