Meaning
Synthetic material formulations simulate the complex permittivity and conductivity of biological tissue to enable standardized specific absorption rate testing of wireless devices. Dielectric tissue phantom acts as the propagation medium inside flat or head shaped test enclosures during electromagnetic absorption compliance procedures. The material absorbs radio frequency energy in a manner identical to human muscle, fat or brain tissue across targeted frequency bands.
This simulation framework applies strictly within the physical boundaries of the phantom container, excluding external air interface propagation and free space radiation patterns.
Permittivity Matching
Regulatory testing standards specify target values for relative permittivity and conductivity across defined frequency ranges. A dielectric tissue phantom recipe uses water, salt, sugar and cellulose agents mixed to exact ratio tolerances. Coaxial probe measurements confirm fluid electrical properties prior to commencing SAR evaluation routines.
Liquid Formulation
Temperature variations alter fluid conductivity and alter localized energy absorption profiles. Maintaining dielectric tissue phantom within specified thermal limits during compliance testing prevents measurement drift. Automated fluid agitation prevents component settling in liquid formulations during long test cycles.
Measurement Boundary
Automated robot positioners submerge field probes inside the phantom volume to map internal electric fields. Dielectric tissue phantom provides a stable electromagnetic background that allows probe arrays to sample local SAR values accurately.
