US 11,755,876 B2
Interference suppression apparatus and interference suppression system
Eiji Muto, Chita-gun (JP); Kohei Enomoto, Chita-gun (JP); and Yusuke Masuda, Chita-gun (JP)
Assigned to DENSO WAVE INCORPORATED, Aichi-pref. (JP)
Filed by DENSO WAVE INCORPORATED, Aichi-Pref. (JP)
Filed on Jun. 16, 2021, as Appl. No. 17/349,172.
Claims priority of application No. 2020-103618 (JP), filed on Jun. 16, 2020.
Prior Publication US 2021/0390362 A1, Dec. 16, 2021
Int. Cl. G06K 19/06 (2006.01); G06K 19/077 (2006.01)
CPC G06K 19/07771 (2013.01) [G06K 19/07773 (2013.01)] 8 Claims
OG exemplary drawing
 
1. An interference suppression apparatus that suppresses electromagnetic field interference produced by a radio frequency identification tag, the interference suppression apparatus comprising:
a power supply circuit;
an antenna that is connected to the power supply circuit;
a clock that is connected to the power supply circuit and generates an output in which a time constant is adjusted to be longer than a communication time of the radio frequency identification tag; and
a load adjuster that is connected to the power supply circuit and changes a characteristic of the antenna based on the output from the clock, wherein:
the radio frequency identification tag is provided on a label;
the interference suppression apparatus is provided on the same label as the radio frequency identification tag; and
the antenna of the interference suppression apparatus and an antenna of the radio frequency identification tag are arranged so as to be substantially parallel to each other with a predetermined gap therebetween.