MULTI-BAND WIRELESS COMMUNICATION APPARATUS AND FILTER OPERATION CONTROL METHOD

PROBLEM TO BE SOLVED: To provide a multi-band wireless communication apparatus capable of effectively suppressing feedback of the noise of a different frequency band to a receiving circuit using a filter, when a plurality of wireless signals different in frequency band are to be transmitted and received simultaneously, and of improving the reception sensitivity, and to provide a filter operation control method. SOLUTION: A portable telephone terminal 100 includes switches 151A, 151B for separating noise suppression filters 152A, 152B from a secondary wireless communication part 100S; and a control part 161 for determining the state of communication data to be transmitted or received via a primary wireless communication part 100P or the secondary wireless communication part 100S so as to make the switches 151A, 151B operate, based on the determined state of the communication data. COPYRIGHT: (C)2007,JPO&INPIT