Title :
Experimental demonstration of transmit diversity for passive backscatter RFID systems
Author :
Hasan, Azhar ; Zhou, Chenming ; Griffin, Joshua D.
Author_Institution :
Disney Res. Pittsburgh, Pittsburgh, PA, USA
Abstract :
Passive, backscatter radio frequency identification (RFID) systems are often range limited by the power incident on the radio frequency (RF) tag. We have demonstrated an increase in the power incident on the RF tag using transmit diversity in a monostatic backscatter channel. Transmit diversity was achieved by phase conjugating the forward link of the backscatter channel associated with each reader antenna. The resulting increase in incident power will increase the range of passive backscatter systems and improve performance in fading environments.
Keywords :
diversity reception; radiofrequency identification; telecommunication channels; RF tag; backscatter channel; backscatter radio frequency identification; passive backscatter RFID systems; radio frequency tag; reader antenna; transmit diversity; Antenna measurements; Backscatter; Power measurement; Radio frequency; Radiofrequency identification; Receivers; Transmitting antennas;
Conference_Titel :
RFID-Technologies and Applications (RFID-TA), 2011 IEEE International Conference on
Conference_Location :
Sitges
Print_ISBN :
978-1-4577-0028-6
DOI :
10.1109/RFID-TA.2011.6068598
