Sony Corporation

Koutarou Kojima

Nobuhito Ebine

Kazuhiko Nakase

Katsuki Hirabayashi

Kuniaki Hirahaya

A built-in antenna applied to sending and reception of radio waves of a few giga cycles is improved and made smaller, and is made suitable for industrial production and has its tuning bandwidth widened. &ldquo;An antenna pattern ( ) which resonates at &lgr;/4&rdquo; is formed on a substrate ( ) and a zigzag portion ( ) is provided on a portion of the antenna pattern ( ) which resonates at &lgr;/4. On the other hand, the substrate ( ) and a bobbin ( ) are supported by a metallic frame ( ), and &ldquo;a helical coil ( ) which resonates at &lgr;/4&rdquo; is wound and formed upon the bobbin ( ). Capacitance (c) is provided between the antenna pattern ( ) which resonates at &lgr;/4 and the helical coil ( ) to electrically couple them.

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Tokyo, Japan

Koutarou Kojima