Time-Domain propagation investigations for Terahertz intra-device communications

Electromagnetic wave propagation modeling for intra-device communications exhibits some peculiarities in comparison to outdoor propagation modeling. Since the environment comprises many features of the order of the wavelength and the antennas are often placed in the vicinity of these objects, the use of widely applied high-frequency approximations such as ray tracing reaches its limits. In this paper, a conceptual analysis of propagation effects arising from the mutual interaction between the antennas and the surrounding geometry is presented. The analysis is based on Finite Difference Time Domain (FDTD) calculations. The paper is concluded by an analysis of full-wave methods vs. ray tracing in intra-device scenarios at THz frequencies.