Title :
Optimize pattern of magnetic sheet attached on NFC/HF-RFID antenna
Author :
Ohmura, N. ; Takase, Eriko ; Ogino, Sumitaka ; Okano, Yoshinobu ; Arai, Shigehisa
Author_Institution :
Microwave Absorbers Inc., Tokyo, Japan
Abstract :
When a payment system with NFC/HF-RFID is installed in smart phone, their communication with 13.56 MHz is blocked by such metal as battery, coil and PCB. To solve this problem, magnetic sheet with high permeability is set between NFC/HF-RFID antenna and near-by metal. So far thin compound magnetic sheet or thin sintered ferrite has been used. In order to make thickness of these materials thinner, we propose amorphous magnetic sheet. Besides this amorphous magnetic sheet causes to increase the transmission effect.
Keywords :
amorphous magnetic materials; impedance matching; magnetic permeability; microwave antennas; near-field communication; radiofrequency identification; smart phones; NFC-HF-RFID antenna; amorphous magnetic sheet; frequency 13.56 MHz; payment system; smart phone; thin compound magnetic sheet; thin sintered ferrite; transmission effect; Amorphous magnetic materials; Antenna measurements; Antennas; Ferrites; Magnetic resonance imaging; Magnetic separation; Permeability;
Conference_Titel :
Intelligent Signal Processing and Communications Systems (ISPACS), 2013 International Symposium on
Conference_Location :
Naha
Print_ISBN :
978-1-4673-6360-0
DOI :
10.1109/ISPACS.2013.6704625
