Modeling of the thorax of human body at 433 MHz

Nowadays, communication networks have become indispensable in our daily lives. In the last years, new networks have been developed, such as the body wireless sensor network “BAN”. So it will be necessary to highlight the influence of the body on the radiation pattern, performance and adaptation of the antenna. To understand the interaction between electromagnetic waves and the human body, it is important to have knowledge about the physical properties of biological tissues which can be seen as multilayer structures. This will be well detailed in this paper. Each layer has its own dielectric characteristics. Those properties are represented by the relative permittivity and conductivity. So to characterize tissues, we must study its properties. Then, a study of the attenuation factor is made, based on a comparison between HFSS and ADS.