Low-SAR Antenna Design and Implementation for Mobile Phone Applications

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

Year: 06/30/2021

Category: Electrical Engineering

Journal: IEEE Access

Institution: IEEE Access

DOI: 10.1109/ACCESS.2021.3093720

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

Abstract

Overview

This paper introduces a novel method dedicated to designing low-Specific Absorption Rate (SAR) antennas for mobile phones, highlighting its significant implications for reducing electromagnetic radiation exposure.

Findings

  • The study establishes a relationship between the magnetic field and SAR values using Maxwell's equations and the electric field formula.
  • It explores the interaction between the antenna's radiation and human tissue magnetic fields, using boundary conditions.
  • A method to lower the antenna's radiated magnetic field is suggested through modifying the surface currents, effectively reducing SAR in human tissues.
  • Simulation and measurement outcomes for two designed low-SAR antennas show a significant reduction (>30%) in SAR values and enhanced efficiency (>40%) within the operational frequency.

Conclusion

The research successfully demonstrates that the proposed antenna designs achieve substantial SAR reductions and meet the necessary bandwidths for 2.4 G WLAN applications, thus confirming the methods' effectiveness and potential health benefits.

antenna design SAR electromagnetic fields health safety mobile technology radiation reduction
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