We report the demonstration of a physically flexible, practicable THz inter
connect with minimal pulse distortion and loss. The interconnect is a paral
lel-plate waveguide with the TEM mode excited, constructed of two thin copp
er strips. The incoming 0.22 ps THz pulse broadens to 0.39 ps after propaga
ting 250 mm in the waveguide and is also attenuated by a factor of ten. We
show that this attenuation is mainly due to the finite conductivity of copp
er with some additional loss caused by the beam spread in the unguided dime
nsion. The pulse broadening is due to the frequency-dependent loss since th
e group velocity dispersion is negligible.