The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Sep. 28, 2004
Filed:
Apr. 01, 2003
Kazuhiko Nakase, Tokyo, JP;
Koutarou Kojima, Tokyo, JP;
Nobuhito Ebine, Tokyo, JP;
Katsuki Hirabayashi, Tokyo, JP;
Kuniaki Hirahaya, Kanagawa, JP;
Sony Corporation, Tokyo, JP;
Abstract
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. “An antenna pattern ( ) which resonates at &lgr;/4” 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 “a helical coil ( ) which resonates at &lgr;/4” 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.