Title:
WIRELESS COMMUNICATION APPARATUS
Document Type and Number:
WIPO Patent Application WO/2013/146341
Kind Code:
A1
Abstract:
A wireless communication apparatus (101) is provided with an antenna coil (13), and an RFIC (110) having built-in resistive elements. The RFIC (110) is provided with an RFIC (11), a capacitive element (14), and resistive elements (R1a, R1b, R2a, R2b). A variable impedance circuit is configured of the resistive elements (R1a, R1b, R2a, R2b), and a part of a circuit in the RFIC (11). The RFIC (11) controls, depending on whether a predetermined IO terminal is set to an output port or to an input port, resistive circuit impedance to be added to an antenna circuit, and sets the Q value of the antenna circuit to a value that corresponds to a communication speed.
Inventors:
YOSUI KUNIAKI (JP)
Application Number:
PCT/JP2013/057375
Publication Date:
October 03, 2013
Filing Date:
March 15, 2013
Export Citation:
Assignee:
MURATA MANUFACTURING CO (JP)
International Classes:
G06K19/07; H01Q7/00; H01Q1/50; H04B1/18; H04B5/02
Foreign References:
| JP2011010159A | 2011-01-13 | |||
| JP2002334310A | 2002-11-22 | |||
| JP2008085649A | 2008-04-10 | |||
| JP2008011341A | 2008-01-17 | |||
| JP2005235810A | 2005-09-02 |
Attorney, Agent or Firm:
Kaede Patent Attorneys' Office (JP)
Patent business corporation Kaede Patent Attorneys' Office (JP)
Patent business corporation Kaede Patent Attorneys' Office (JP)
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