Tolerance Analysis of Double Corrugated Waveguide for D-band TWT

D-band TWTs (151 – 161.5 GHz) are the enabling devices for long range links with high capacity at sub-THz frequency. The EPSRC DLINK project aims to produce a front end to provide about 45 Gb/s for 1 kilometre range in point to point with 99.99% availability in ITU zone K. The design and fabrication of the TWTs is in progress. The short wavelength at D-band needs high precision fabrication and strict tolerances. This paper will discuss the impact of variation of dimensions against the nominal design value of the double corrugated waveguide for a 151 – 161.5 GHz TWT, highlighting the design parameters that needs higher accuracy.