Patent ID: 7911401
Filing Date: 2011-03-22
Classification: H01Q,H04R

Abstract:
1. An earphone antenna comprising: a balun for changing a balanced mode to an unbalanced mode, one end of a pair of audio/high-frequency signal lines being connected to one terminal of the balun on the balanced side, the other end of the pair of audio/high-frequency signal lines being connected to the other terminal of the balun on the balanced side, the pair of audio/high-frequency signal lines being connected to a left earphone unit, another portion of the pair of audio/high-frequency signal lines being connected to a right earphone unit; and high-frequency signal blocking means disposed between the left and the right earphone units and the audio/high-frequency signal lines connected to the left and the right earphone units; wherein the high-frequency signal blocking means has high impedance for high-frequency signals so as to virtually block the high-frequency signals and has low impedance for audio signals so as to allow the audio signals to pass therethrough.