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:
Mar. 08, 2005
Filed:
Jul. 26, 2002
Masahide Sato, Tokyo, JP;
Masahide Sato, Tokyo, JP;
TDK Corporation, Tokyo, JP;
Abstract
In an antenna deviceincluding a line-shaped or belt-shaped first conductorhaving an electrically half length of a wave-length of a first resonant frequency, a feed pointto which an end of the first conductor is connected, a plate-shaped second conductoron which the feed point is located and on which another end of the first conductor is grounded, an impedance elementis loaded halfway on the first conductor and which varies the first resonant frequency, a second resonant frequency, or both the first resonant frequency and the second resonant frequency. Accordingly, a compact antenna devicecan therefore be constituted so that an impedance matching between the first conductorand the feed pointmay be readily obtained. In addition, the antenna devicecan be commonly used with respect to a multi-frequency operation.