Low-SAR Antenna Design and Implementation for Mobile Phone Applications

Authors: Bao Lu, Bo Pang, Wei Hu, Wen Jiang

Year: 06/30/2021

Category: Engineering

Journal: IEEE Access

Institution: IEEE

DOI: 10.1109/ACCESS.2021.3093720

URL: https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=9468878

Abstract

Overview

This paper introduces a novel methodology for designing antennas with a low specific absorption rate (SAR) suitable for mobile phone applications.

Key Findings

  • The connection between the magnetic fields and SAR values is deduced using Maxwell’s equations and the standard formulae of SAR.
  • Study of the interaction between the antenna's radiated magnetic field and the magnetic fields within human tissues.
  • Development of relationships between the surface current of an antenna and its radiated magnetic fields.
  • Proposal of an approach to reduce the antenna's radiated magnetic field by adjusting its surface current to decrease the SAR in human tissues.

Conclusion

The paper successfully designs two low-SAR antennas, demonstrating their efficacy with simulation and measurement results. These include a significant reduction over 30% in peak SAR values and efficiencies above 40% in their operational frequencies, validating the proposed design approach for managing SAR in mobile terminal antennas.

SAR antenna design mobile phones electromagnetic fields health safety
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