Design of THz Low-Loss Flexible Waveguide Structure

In this paper, a flexible waveguide structure in terahertz (THz) band is designed and optimized which selects the porous polymer fiber as the core of the structure. The simulation results show that the structure can achieve insertion loss of 0.08dB/cm and flat dispersion coefficient of about 1.5ps/(GHz·m) in the range from 195 to 225GHz. In addition, the insertion loss of the structure with the bending radius of 31mm is also calculated and the results show that: the performance of the designed THz flexible waveguide structure has a little change with the bending radius, which will be well applied in THz communication system.