Near Field Exposure Conditions by UHF-RFID Systems in Smart Healthcare Environments

Authors: S. de Miguel-Bilbao et al.

Year: 2021

Category: Electromagnetic Field Safety

Journal: IEEE International Joint EMC/SI/PI and EMC Europe Symposium

Institution: IEEE

DOI: 10.1109/EMC/SI/PI/EMCEurope52599.2021.9559189

URL: https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=9559189&isnumber=9559134

Abstract

Overview

Short range wireless RFID technology is increasingly used in healthcare and social care settings. These systems must operate alongside other sources of electromagnetic (EM) radiation, and their functionality is crucial especially near patients with implanted devices.

Study Focus

This study focused on analyzing the EM exposure conditions caused by RFID systems utilised in healthcare environments. It specifically discusses the near EM field exposure produced by RFID readers, combining empirical data and computational models.

  • Measurements taken in anechoic chamber conditions
  • Numerical simulations to model exposure

Key Findings

The investigation highlighted several critical factors:

  • The impedance of EM fields near RFID readers varies significantly from that of far-field conditions.
  • Significant EM radiation is observed near RFID systems, particularly within 50 cm of the device, raising concerns when the power emission exceeds 2 watts.
  • SAR (Specific Absorption Rate) evaluations and other measurement metrics are necessary to assess the safety levels and regulatory compliance of RFID usage in proximity to humans.

Implications for Health Safety

Close proximity to RFID readers can pose significant health risks, especially for healthcare personnel and patients with implants. This study underlines the necessity of stringent controls and safety measures to mitigate these risks in smart healthcare environments.

RFID electromagnetic fields healthcare safety EM exposure near field radiation RFID technology smart healthcare
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