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:
Feb. 22, 2005
Filed:
Dec. 06, 2001
Joji Kane, Nara, JP;
Hirotaka Ishihara, Ibaraki, JP;
Joji Kane, Nara, JP;
Hirotaka Ishihara, Ibaraki, JP;
Matsushita Electric Industrial Co., Ltd., Osaka, JP;
Abstract
Conventional antennas devices provide in sufficient performance in terms of directivity, efficiency, or the like. An antenna device includes a radiating elementwhich is provided with a feed terminalto draw power and has a spiral shape; a passive elementwhich is installed side by side with the radiating elementand has a spiral shape; an earth grounddisposed in opposing relation to the radiating elementand the passive element; a first connecting electrodefor connecting one end of the radiating elementto the earth ground; and a second connecting electrodefor connecting one end of the passive elementto the earth ground, and the first and second connecting electrodesandare displaced with respect to each other in a plane which includes the spiral shape.