Abstract: For the purpose of Terahertz Band (THz) communication based electromagnetic nanonetworks,an analytical THz channel model from the aspect of energy consumption was proposed,by considering the peculiarities of path loss and molecular absorption in the propagation of THz band.Two different scenarios with or without reflection path were adopted to analyze the influence of path loss in the THz band,respectively.For the analysis of peculiarities of molecular absorption,the theory of atmospheric radiation was adopted.In detail,energy consumption of THz communication combined with the path loss and atmospheric molecular absorption was presented with different transmission distances and frequencies.The results demonstrate that the energy consumption for molecular absorption is an important element for the total ener-gy consumption of electromagnetic wave in the THz band,and atmospheric molecular absorption is decided by the composition of molecular in transmission medium,while the energy consumption for path loss is affected by the transmission frequency and distance.The analytical results have an important reference value for the design of nano-node and the selection of transmission frequency.

Key words: THz communication,Energy consumption,Nanonetworks,Path loss,Molecular absorption