| 摘要 |
An antenna device and a portable wireless communication apparatus are disclosed to securely lower a local average SAR in correspondence to at least two or more kinds of radio communication systems using different radio communication frequencies even when any radio communication frequency is used. The present invention makes it possible to bring input impedance at open ends of conductive planar plates 11A and 11B close to infinity at first and second radio communication frequencies and restrict emission of electromagnetic waves by restricting a high-frequency current to be supplied to the above described conductive plates 11A, 11B and a shield case 2, thereby securely lowering the local average SAR in correspondence to at least two or more kinds of radio communication systems using different radio communication frequencies even when any radio communication frequency is used.
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