Dipole Antenna Above EBG Substrate for Local SAR Reduction
Ryo Ikeuchi and Akimasa Hirata
Department of Computer Science and Engineering, Nagoya Institute of Technology, Nagoya, Japan
This letter investigates the performance of a dipole antenna above an electromagnetic band-gap (EBG) substrate to realize a low specific absorption rate (SAR) antenna. The frequency band considered is 3.5 GHz, which is assigned to fourth-generation mobile communications. One of the motivations for this proposal is that the size of the EBG substrate can be small enough for a handset. The dipole antenna above the EBG substrate was found to reduce the local SAR in a cubic headmodel by 84% as compared to the local SAR of a perfect electric conductor. The radiation efficiency was also improved by 10%. These results were also confirmed for a realistic head model.
IEEE Antennas and Wireless Propagation Letters
2011
10
904-906
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