Characteristics of THz Pulse Propagation on Teflon Covered Two-Wire Lines

Abstract

We report efficient direct coupling of THz dipole antenna pulses onto air spaced two-wire transmission lines and Teflon covered two-wire lines. The air spaced two-wire lines show TEM mode propagation with very small group velocity dispersion (GVD) and relatively low attenuation. The Teflon covered two-wire lines showed comparatively much higher attenuation and GVD. However, the Teflon covered two-wire lines show a very good guiding property when the lines are curved. Although the lines are circled only 5.0 cm in diameter, there is no additional attenuation compared to straight the lines.

Low-Loss Polytetrafluoroethylene Hexagonal Porous Fiber for Terahertz Pulse Transmission in the 6G Mobile Communication Window

“…As an early attempt, metal wire and metal-coated dielectric tubes have been proposed for THz waveguides. However, they suffer from a high bending loss and a low efficiency of bonding to embedding materials [13], [14]. As an alternative, polymer-based bandgap fibers, Bragg fibers, hollow core fibers, and solid core fibers have been reported [15]- [25] to take advantage of the relatively low absorption of specific polymers in the THz range.…”