| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To enhance efficiency of radiation at a frequency to be used in a wireless device, and to suppress a loss caused by a magnetic substance of a shielding member at other frequency, by at least partially shielding radiation of electromagnetic waves from an antenna toward a human body, by using the shielding member including the magnetic substance. <P>SOLUTION: A wireless device 1 includes a substrate 11, an antenna 12 and a shielding member 13. Magnetic substance elements 13a to 13d that the shielding member 13 includes are iteratively disposed while making their lengthwise direction approximately orthogonal to the direction of main polarization of electromagnetic waves radiated from the antenna 12 and while providing neighboring intervals in the same direction as the relevant main polarization. By providing the neighboring intervals in the magnetic substance elements 13a to 13d, the effective area of a magnetic substance element to which a magnetic field is applied which is generated when power is fed to a loop antenna 15 provided near the magnetic substance element, is reduced less than that when the intervals are not provided, thereby suppressing a loss caused by the magnetic substance. <P>COPYRIGHT: (C)2009,JPO&INPIT</p> |
