Title :
Material property of on-metal magnetic sheet attached on NFC/HF-RFID antenna and research of its proper pattern and size on
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 13.56MHz 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 :
HF antennas; ferrites; magnetic materials; permeability; radiofrequency identification; smart phones; NFC-HF-RFID antenna; amorphous magnetic sheet; frequency 13.56 MHz; near-field commuunication; on-metal magnetic sheet; pattern and size on; payment system; radiofrequency identification; smart phone; thin compound magnetic sheet; thin sintered ferrite; Amorphous magnetic materials; Antenna measurements; Antennas; Ferrites; Magnetic resonance imaging; Magnetic separation; Permeability;
Conference_Titel :
Antennas & Propagation (ISAP), 2013 Proceedings of the International Symposium on
Conference_Location :
Nanjing
Print_ISBN :
978-7-5641-4279-7
