To unecessitate transmission mode conversion at the time of feeding power and to secure the length of an antenna in accordance with the wave length by feeding power to a circuit pattern where the antenna is formed on a print wiring board from both surfaces and forming the circuit pattern zigzag on a print wiring board.
An electrode feeding power to the antenna 1 is provided with a feeding electrode 3 and a grounded electrode 4 which are different. The electrode 3 supplied negative and positive power sources to the circuit pattern 6 of the antenna 1 and the electrode 4 normally has a zero-volt potential. Power is fed to the antenna 1 from the both surfaces by executing abutting on a projected power feeding part 2 formed at the antenna 1 and executing holding. When an antenna mainbody is contained in a case 5, the electrodes 3 and 4 have a fixed interval without being brought into contact with the antenna 1. Thus, the electrodes 3 and 4 for holding the antenna 1 between them are provided inside the case and the antenna 1 is bent. The electrodes are directly brought into contact with the power feeding part 2 of the wiring board when the antenna 1 is extended and power is fed by electromagnetic connection at the time of containing the antenna 1.
YOSHIDA TAKASHI
GOTO HIROMICHI
MAEDA YOSHIHIRO
MAEDA YUTAKA
