Effective Magnetic Sheet Loading Method for Near Field Communication Antennas

Takaho SEKIGUCHI  Yoshinobu OKANO  Satoshi OGINO  

Publication
IEICE TRANSACTIONS on Electronics   Vol.E99-C   No.10   pp.1211-1214
Publication Date: 2016/10/01
Online ISSN: 1745-1353
DOI: 10.1587/transele.E99.C.1211
Type of Manuscript: BRIEF PAPER
Category: 
Keyword: 
near field communication,  radio frequency identification tags,  impedance matching,  inductance,  

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Summary: 
Near field communication (NFC) antennas are often lined with magnetic sheets to reduce performance degradation caused by nearby metal objects. Though amorphous sheets have a high permeability and are suitable magnetic sheets for lining, their magnetic loss is also high. Therefore, this paper suggests a technique of suppressing magnetic loss by modifying the shape of the sheet without changing its composition. The utility of the proposed technique was investigated in this study.