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:
Jul. 28, 2015
Filed:
Aug. 30, 2011
Applicants:
Yutaka Aoki, Ome, JP;
Akira Saitou, Machida, JP;
Kazuhiko Honjo, Tsukuba, JP;
Inventors:
Assignees:
CASIO COMPUTER CO., LTD., Tokyo, JP;
THE UNIVERSITY OF ELECTRO-COMMUNICATIONS, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H01Q 21/26 (2006.01); H01Q 21/06 (2006.01); H01Q 21/24 (2006.01); H01Q 9/28 (2006.01); H01Q 21/00 (2006.01); H01Q 5/321 (2015.01);
U.S. Cl.
CPC ...
H01Q 21/06 (2013.01); H01Q 5/321 (2015.01); H01Q 9/285 (2013.01); H01Q 21/0006 (2013.01); H01Q 21/24 (2013.01); H01Q 21/26 (2013.01);
Abstract
A multi-frequency circularly polarized antenna () comprises a substrate and multi-frequency antennas (). The multi-frequency antennas () comprise antenna elements (), shunt-inductor conductors (), series-capacitor conductors (), series-inductor capacitors (), a center point () and input/output terminals (). The multi-frequency circularly polarized antenna () is constructed by connecting the shunt-inductor conductors () of the multi-frequency antennas () at the center point () in a substantially perpendicular manner.