Patent · US Active

Omnidirectional RFID antenna

US8022827B2 · kind B2 · utility

1Cited by

9References

4Claims

0Family size

Assignee

BAE Systems Information and Electronic Systems Integration Inc. · US

Inventors

Court E. Rossman · Merrimack, US
Zane Lo · Merrimack, US

Key dates

Filing date	Oct 11, 2006
Grant date	Sep 20, 2011
Priority date	—
Expiry date	Mar 22, 2028

Classification

Technology area (CPC H)Electricity
CPC primaryH01Q21/26
WIPO fieldTelecommunications
WIPO sectorElectrical engineering

Abstract

Antennas (50) for RFID tags are made to exhibit circular polarization to give the tag an omnidirectional characteristic. The antennas are crossed dipoles (52,54) with respective feed points (56,58). The signal source (60) is coupled to a splitter (62) having output leads (64) directly coupled to the feed point (56) of dipole (52). The other output leads (66) from splitter (62) are coupled to a delay line (68) with the delayed output coupled to a feed point (58) of dipole (54).

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.