SAR Reduction of PIFA with EBG Structures for Mobile Applications

Sangil KWAK  Dong-Uk SIM  Jong Hwa KWON  Je Hoon YUN  

IEICE TRANSACTIONS on Communications   Vol.E92-B   No.11   pp.3550-3553
Publication Date: 2009/11/01
Online ISSN: 1745-1345
DOI: 10.1587/transcom.E92.B.3550
Print ISSN: 0916-8516
Type of Manuscript: LETTER
Category: Antennas and Propagation
electromagnetic bandgap,  PIFA,  SAR,  

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This paper proposes two types of electromagnetic bandgap (EBG) structures aimed for SAR reduction on a mobile phone antenna. The EBG structures, one which uses vias while the other does not can reduce the surface wave and prevent the undesired radiation from the antenna. Thus, these structures can reduce the electromagnetic fields toward the human head direction and reduction the SAR value. Tests demonstrate the reduction of SAR values and therefore, the human body can be protected from hazard electromagnetic fields by using the proposed EBG structures, regardless of whether vias are used or not.