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:
Dec. 17, 2013
Filed:
Oct. 05, 2012
Applicant:
Casio Computer Co., Ltd., Tokyo, JP;
Inventor:
Yutaka Aoki, Ome, JP;
Assignee:
Casio Computer Co., Ltd., Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H01Q 21/26 (2006.01);
U.S. Cl.
CPC ...
Abstract
The present invention provides an antenna that enables circular polarization in a plurality of oscillation frequencies. A multi-frequency circular polarization antenna is formed with a substrate and multi-frequency antennas. The multi-frequency antennas are formed with antenna elements, shunt inductor conductors, series capacitor conductors, series inductor conductors, a center point, and input/output terminals. The multi-frequency antenna is arranged to cross the multi-frequency antenna at the center point to make an angle that is less than 90 degrees with respect to the multi-frequency antenna.