  In this paper, we present new measurement results to model large-scale path
loss, angular spread and channel sparsity at the sub-THz (141-145 GHz) band,
for both indoor and outdoor scenarios. Extensive measurement campaigns have
been carried out, taking into account both line-of-sight (LoS) and non
line-of-sight (NLoS) propagation. For all considered propagation scenarios,
omni-directional and directional path loss models have been developed, based on
the so-called close-in (CI) free-space reference distance model. Moreover, path
loss modeling has been applied for the 2nd and 3rd strongest multipath
components (MPCs), based on which path loss exponent and large-scale shadow
fading estimates have been derived. A power angular spread analysis is further
presented, using up to the 3rd strongest MPC. Finally, results on the sparsity
of the wireless channel have also been presented by employing the so-called
Gini index.
