Differential Method for Determining the Specific Absorption Rate of Electromagnetic Energy of a Liquid Phantom

Measurement Technique (USA). 2023. Vol. 66. No. 1. P. 45–50.

D. Rano, A. A. Yelizarov, I. V. Nazarov, A. A. Skuridin, E. A. Zakirova

The wide use of small-sized wearable electronic devices in various practical human activities makes it
relevant to measure the proportion of electromagnetic energy absorbed by the human body. One of the
most important parameters that determines it is the specifi c absorption rate. In this article the authors
propose a method for determining this coeffi cient for a liquid phantom with the use of computer simulation
and experimental measurement of the microstrip patch antenna parameters. The antenna is located on
an elliptical cylinder and operates in the wireless medical body area network. The method is based on
measuring the rise in temperature of the liquid phantom exposed to electromagnetic waves generated by a
microstrip patch antenna over a certain time. Homogeneous liquid phantom was created by changing the
percentage of salt and sugar in 250 g of water, the skin phantom — by changing the percentage of water
in 200 g of glycerol. The proposed specifi c absorption rate measurement method eliminates the need to
purchase an expensive set of dielectric probes, which demonstrates its cost-eff ectiveness. The results of
experimental measurements are in good agreement with the results of the performed computer simulation.
 

Keywords: Electrical conductivity, attenuation coefficient, liquid phantom, microstrip patch antenna (MPA), specific absorption rate, relative permittivity, medical body area network (MBAN)

Publication based on the results of: Исследование технологий и устройств беспроводного трансфера электромагнитной энергии для высокоскоростных мобильных и нательных устройств Интернета вещей (IoT/IIoT) и киберфизических систем (2023)