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. 10, 2002
Filed:
Nov. 27, 2000
Matsushita Electric Industrial Co., Ltd., Osaka, JP;
Abstract
An antenna includes a grounding plate and a plurality of radiator elements in rectangular shape. The elements are disposed on the grounding plate with its one end being electrically coupled to the grounding plate. Longitudinal lengths of the elements are set within a range of &lgr;/8-3&lgr;/8 so that working frequencies are adjusted at given frequencies. Accordingly, this one antenna can transmit and receive frequencies in a desired frequency band. A coupler is disposed between the plurality of elements, and only one element is fed with power, while the other elements are fed indirectly, so that numbers of feeding points and feed lines are reduced. Further, a distance between the grounding plate and the elements is adjusted to a 0.5-3 inch range, whereby a thin and low antenna is obtainable.