Specific Absorption Rate (SAR) in the Human Brain
Application ID: 2190
Scientists use the SAR (specific absorption rate) to determine the amount of radiation that human tissue absorbs. This measurement is especially important for mobile telephones, which radiate close to the brain. The model studies how a human head absorbs a radiated wave from an antenna and the temperature increase that the absorbed radiation causes.
The increasing use of wireless equipment has also increased the amount of radiation energy to which human bodies are exposed. A common property that measures absorbed energy is the SAR value, (specific absorption rate) to determine the amount of radiation that human tissue absorbs.
The human head geometry is the same geometry (SAM Phantom) provided by IEEE, IEC and CENELEC from their standard specification of SAR value measurements. The original geometry was imported into COMSOL Multiphysics. In addition, the model samples some material parameters with a volumetric interpolation function that estimates the variation of tissue type inside the head.
This model studies how a human head absorbs a radiated wave from an antenna, and the temperature increase that this causes. This model requires the RF Module and the Heat Transfer Module.
This model example illustrates applications of this type that would nominally be built using the following products:RF Module
however, additional products may be required to completely define and model it. Furthermore, this example may also be defined and modeled using components from the following product combinations:
The combination of COMSOL® products required to model your application depends on several factors and may include boundary conditions, material properties, physics interfaces, and part libraries. Particular functionality may be common to several products. To determine the right combination of products for your modeling needs, review the Specification Chart and make use of a free evaluation license. The COMSOL Sales and Support teams are available for answering any questions you may have regarding this.