Sub-THz traveling wave amplifiers based on the double corrugated waveguide

The importance of the sub-THz (0.1–1 THz) portion of the spectrum is recognized fundamental for many applications. In particular, the region around 0.22 THz is suitable for high data rate communications 1 and imaging due the low atmospheric attenuation window. However, high power is needed in this frequency range to provide a reasonable length of the transmission path.