| 摘要 |
PROBLEM TO BE SOLVED: To improve impedance characteristics and radiation characteristics, and to achieve broadbanding without causing enlargement of a terminal. SOLUTION: On a circuit board 1, a conductor 6 is disposed along and in parallel with a side that generates a main radiation wave. The conductor 6 is formed L-shaped, its proximal end is electrically connected to a ground pattern 2 formed on a rear side of the circuit board 1, and its tip is made open. A position for connecting the conductor 6 to the ground pattern 2 is set to a position selected such that an effective electric length from a power feeding point BP toward an antenna 5 to the tip of the conductor is a half wavelength of a radio-frequency signal. Moreover, the full length of the conductor 6 is set to a quarter wavelength radio-frequency signal to be transmitted/received. COPYRIGHT: (C)2008,JPO&INPIT
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