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1. (WO2013146341) WIRELESS COMMUNICATION APPARATUS

Pub. No.:    WO/2013/146341    International Application No.:    PCT/JP2013/057375
Publication Date: Fri Oct 04 01:59:59 CEST 2013 International Filing Date: Sat Mar 16 00:59:59 CET 2013
IPC: H01Q 7/00
G06K 19/07
H01Q 1/50
H04B 1/18
H04B 5/02
Applicants: MURATA MANUFACTURING CO., LTD.
株式会社村田製作所
Inventors: YOSUI, Kuniaki
用水邦明
Title: WIRELESS COMMUNICATION APPARATUS
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.