Title:
WIRELESS DEVICE, WIRELESS SYSTEM, AND WIRELESS DEVICE DETECTION METHOD
Document Type and Number:
Japanese Patent JP2013033424
Kind Code:
A
Abstract:
To precipitously acquire a large heating value when a radio wave is emitted to a wireless device.
In an IC tag 100, when a comparator 136 determines that received power is equal to or more than a predetermined value, the comparator 136 controls a switch 102 to connect an antenna 101 and a capacitor 121. In this state, the antenna 101 generates heat by receiving a radio wave transmitted from an IC tag reader. In this state, an RF circuit 111 is separated from the antenna 101, and the IC tag reader can transmit a strong radio wave to increase a heating value generated in the antenna 101, thus it is possible to precipitously acquire a large heating value.
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Inventors:
YASUDA HIDEYUKI
Application Number:
JP2011170081A
Publication Date:
February 14, 2013
Filing Date:
August 03, 2011
Export Citation:
Assignee:
SHARP KK
International Classes:
G06K19/07; G01B15/00; G01B15/04; G01K3/00; G01S5/16; G06K17/00; H04B5/02
Attorney, Agent or Firm:
Takeshi Funayama
Masao Miki
Susumu Nomura
Naoki Ofusa
Koji Kata
Masao Miki
Susumu Nomura
Naoki Ofusa
Koji Kata