Method for active and passive detection of electromagnetic waves reflecting or emanating from the skin in defined frequency ranges was developed. Technology based on existing methods of microwave reception and transmission, combined with proprietary software, data treatment, and antenna design.

 

In the interaction of microwave radiation and human beings, the skin is traditionally considered as just an absorbing sponge stratum filled with water. In 2008, we showed that this view is flawed when we demonstrated that the coiled portion of the sweat duct in upper skin layer could be regarded as a helical antenna in the sub-THz band. Experimentally we showed that the reflectance of the human skin in the sub-THz region depends on the intensity of perspiration, and correlates with levels of human stress (physical, mental and emotional). Furthermore, in 2014 we detected circular dichroism in the reflectance from the skin, a signature of the axial mode of a helical antenna. The full ramifications of what these findings represent in the human condition are still very unclear. How does control of the sweat duct by the central nervous system influence the reflection we found? Since the Sympathetic Nerve Response controls sweat gland activity and this activity affects the reflectance, our findings suggest the possibility of a direct reading of the human mental state with all that this implies.