ANTENNA ARRAY FOR AN RFID READER COMPATIBLE WITH TRANSPONDERS OPERATING AT DIFFERENT CARRIER FREQUENCIES
Application 1234/DEL/2005 published 2007-01-12, filed 2005-05-13
An antenna array is provided for an RFID reader, which includes a first reader antenna tuned to operate at a second frequency different from the first frequency. The first and second antennas are preferably arranged in an overlapping arrangement or an opposing magnetic flux arrangement to reduce the effect of antenna self resonance.
Applicant
1)ASSA ABLOY IDENTIFICATION TECHNOLOGY GROUP AB
:KLARABERGSVIADUKTEN 90, 107 23 STOCKHOLM, SWEDEN Sweden
Inventor
1)RALPH W. QUAN
International Info
Classification: HO1Q21/06
Priority Information
10/848,246 U.S.A. 2004-05-18