Project M01 - THz Channel Measurements for Material Characterization and Localization

Principal Investigator: Prof. Dr. Thomas Kaiser, UDE DSV

For mobile and precise material characterization and localization within the targeted frequency range of 250 GHz to 4 THz, a highly precise and extremely wideband THz Channel Measurement System (TCMS) is required for enabling dynamic and reproducible channel measurements. For such purposes, the TCMS transmitter and receiver locations should be known with an accuracy being significantly lower than the minimum wavelength, meaning significantly lower than 37.5 μm in its ultimate development stage. This poses a distinct challenge for the concept and construction of the TCMS, which is applied as a part of major instrumentation in a separate proposal. In completion, M01 focuses on research in THz channel measurement and modelling and the required measurement campaigns. The central question of M01 is therefore to explore and to exploit the almost unknown frequency range by means of measurements, modelling and also signal processing. In particular, in addition to modern but bulky measurement equipment, the novel technology being realized within MARIE’s C-projects will be applied for wireless indoor and later outdoor environments.

Key approaches to address this question in the 1st MARIE phase “Static” are therefore:

  • Extensive channel measurement campaigns from 250 GHz to 1.5 THz for different scenarios.
  • Subsequent channel modelling and its validation relying on a multi-ray model and being adapted to material characterization and localization, including the material roughness and its shape, using the principles of ellipsometry and reflectometry or by exploiting the orbital angular momentum of THz waves.
  • Virtual and later partial or even full Massive MIMO (MMIMO) measurements and modelling, e.g. for suitable post processing of hundreds or even thousands of on-chip antenna elements.
  • Novel time-variant channel measurements and modelling in order to provide fundamental insights for the aspect of mobility being of central meaning in the 2nd phase of MARIE.

In summary, M01 provides the fundamental measurements for the MARIE consortium and on that basis leads to novel models, e.g. for multiple antennas and time variant channels.