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:
Oct. 06, 2009
Filed:
Mar. 17, 2005
Junxiang GE, Tokyo, JP;
Shozaburo Kameda, Yokohama, JP;
Hiroshi Ichikawa, Ube, JP;
Yokowo Co., Ltd., Tokyo, JP;
UBE Industries, Ltd., Yamaguchi, JP;
Abstract
An antenna elementis formed such that a plurality of turning partsare formed by being turned back in zigzag in parallel to a ground conductor filmwhile extending perpendicularly thereto and the lengths of segmentsbetween the turning parts are shorter on a side of the ground conductor film(a side of a feeding part) and increase gradually as the segments are away from the ground conductor film. The turning parts of the antenna elementare formed such that the antenna resonates at two or more frequency bands, and has a fractional bandwidth of 4% or more of its frequency in a first frequency band and a fractional bandwidth of 15% or more of its frequency in a second frequency band by adjusting the lengths L, Land Lof respective segments and the intervals d, dand dbetween adjacent segments. Consequently, a wideband antenna is realized in two or more multi-frequency bands, for example 2.4 to 2.5 GHz and 5 to 6 GHz, by using a single folded antenna.