Title :
Mitigation of proximity to metal for magnetically coupled transponders by use of resonant loops
Author :
Mukherjee, Sayan
Author_Institution :
Thin Film Electron. Inc., San Jose, CA, USA
Abstract :
Deleterious effect of metal in proximity of magnetically coupled readers/transponders is often mitigated by ferrite shields. A resonant circuit at a fraction of the cost of ferrite materials can reduce the effect by robbing energy from the metal. A simplified theory in conjunction with circuit and field simulation and experiments are presented.
Keywords :
ferrites; magnetic circuits; transponders; ferrite materials; ferrite shields; magnetically coupled readers; magnetically coupled transponders; resonant circuit; resonant loops; Antennas; Ferrites; Impedance; Integrated circuit modeling; Magnetic fields; Metals; Radiofrequency identification; HF RFID; Near Field Communication;NFC; WPT; Wireless Power Transfer; current robbing; eddy current mitigation; low cost alternative to ferrite shield; metal effect mitigation;
Conference_Titel :
RFID (IEEE RFID), 2014 IEEE International Conference on
Conference_Location :
Orlando, FL
DOI :
10.1109/RFID.2014.6810706
