Terahertz characterisation of building materials

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