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. 20, 2011
Filed:
Oct. 11, 2006
Applicants:
Court E. Rossman, Merrimack, NH (US);
Zane Lo, Manchester, NH (US);
Inventors:
Court E. Rossman, Merrimack, NH (US);
Zane Lo, Manchester, NH (US);
Assignee:
BAE Systems Information and Electronic Systems Integration Inc., Nashua, NH (US);
Attorneys:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G08B 13/14 (2006.01); H01Q 7/08 (2006.01); H01Q 1/48 (2006.01);
U.S. Cl.
CPC ...
Abstract
Antennas () for RFID tags are made to exhibit circular polarization to give the tag an omnidirectional characteristic. The antennas are crossed dipoles () with respective feed points (). The signal source () is coupled to a splitter () having output leads () directly coupled to the feed point () of dipole (). The other output leads () from splitter () are coupled to a delay line () with the delayed output coupled to a feed point () of dipole ().