| 摘要 |
PROBLEM TO BE SOLVED: To provide an antenna device that ensures impedance matching with a transistor amplification circuit in a wide band and is excellent in reception sensitivity characteristics in a wide band. SOLUTION: The antenna device 207 has an antenna element 102, a field-effect transistor 202 connected to one side of the antenna element 102, and an inductor 201 connected between the one side of the antenna element 102 and a ground 203. The thickness of the antenna element 102 is 0.5 to 3 times the skin depth. COPYRIGHT: (C)2009,JPO&INPIT
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