Terahertz characterisation of building materials

To obtain the realistic models for propagation channels in future picocellular indoor terahertz communication systems, it is necessary to know the reflective properties of building materials found in a typical office environment. The angular dependent reflection coefficients of different building materials were determined using terahertz timedomain spectroscopy in transmission geometry and Fresnel's equations. This approach is more efficient than a set of measurements in reflection geometry for different angles. The verification of the method with a set of such reflection measurements shows an excellent agreement.