To provide an antenna system that is not affected by a wireless terminal, deteriorates no antenna efficiency, can stably transmit/receive a radio wave and uses part of an earphone cord.
The antenna system is provided with a circuit board and first and second metallic wires, the circuit board being installed inside a mobile wireless apparatus main body, the wires from the circuit board being branched from the circuit board into two and connected to first and second earphones at the branched destination so as to form a sound transmission line between the circuit board and the first and second earphones, the length of the first and second metallic wires from the first earphone to the second earphone is almost the same, the first and second metallic wires are placed contactless and closely to each other, first and second inductors are provided to the sides of the different earphones in the vicinity of the branch points, and a dipole antenna is formed by the first and second metallic wires at the earphone sides from the branch points.
SUGIURA HIROYUKI
FUKAZAWA TORU
NISHIMOTO KENGO
OTSUKA MASATAKA
MAKINO SHIGERU
Michiharu Soga
Hidetoshi Furukawa
Suzuki Kenchi
Kajinami order