| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a portable communication terminal that reduces radio wave interference by radiation noise from a CPU, DC-DC converter and the like without changing a communication frequency or the clock frequency of a noise source. <P>SOLUTION: A portable communication terminal communicates a radio wave at a reception device 102, but a noise source 105 radiates unwanted noise which interferes with the radio wave for communication. However, an electric conductive shield structure 106 suppressing the radiated unwanted noise is separably connected to multiple types of impedance members 108-111. Because a connection control unit 103 controls connection of such a shield structure 106 and the multiple types of impedance members 108-111 according to a communication frequency of a radio wave, wideband unwanted noise interfering with a wideband radio wave can be effectively reduced. <P>COPYRIGHT: (C)2013,JPO&INPIT |
