Patent ID: 6785519
Filing Date: 2004-08-31
Classification: H01Q,H04B

Abstract:
A portable telephone comprising:an antenna; a microphone for generating a first audio signal corresponding to a sound entered to said microphone; a transmitting circuit for modulating said first audio signal from said microphone to generate a first radio signal, and transmitting said first radio signal via said antenna; a receiving circuit for receiving a second radio signal which is modulated from a second audio signal via said antenna, and demodulating said second radio signal to reproduce said second audio signal; a receiver for outputting a sound corresponding to said second audio signal from said receiving circuit; a printed circuit board on which said receiving circuit and said transmitting circuit are mounted; a shield case which surrounds said printed circuit board for suppressing an electromagnetic interference between said printed circuit board and said antenna, and has an electrical conductivity at least on its surface; a housing for accommodating said microphone, said receiver and said shield case; an electromagnetic wave absorption layer containing a magnetic loss material, provided at least in a portion between said shield case and said housing; and an electromagnetic wave reflection layer containing a magnetic reflection material, provided between said housing and said electromagnetic wave absorption layer.