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, 2016
Filed:
Aug. 26, 2011
Mayumi Matsunaga, Ehime, JP;
Kenji Kakemizu, Ehime, JP;
Mayumi Matsunaga, Ehime, JP;
Kenji Kakemizu, Ehime, JP;
NATIONAL UNIVERSITY CORPORATION EHIME UNIVERSITY, Ehime, JP;
Abstract
A shared antenna communicates radio waves with different frequencies or different polarization characteristics, and has a simple configuration that can be placed in a small device. The antenna includes a plurality of loops of the shape of a cross in a spiral fashion and includes a gap provided at a certain midpoint in the spiral loops and a power supply portion provided in a central portion. The distance of the gap is set such that electromagnetic coupling is caused at a first frequency and no electromagnetic coupling is caused at a second frequency different from the first frequency.