Loss of WR 10 Waveguide across 70-116 GHz

The losses of ~1.2 m long WR10 (2.54x1.27 mm2) rectangular waveguides were measured at room temper ature across the 70-116 GHz band. Ten different waveguide modules were machined in two different materials (Aluminum alloy and Brass) using different surface roughness (Ra) and d ifferent splitblock waveguide geometries (E-plane and b-edge) as to establish the dependency of the losses on the various paramet ers. The measurements of the various units were performe d with the IRAM mm-wave Vector Network Analyzer (MVNA) across the 70-116 GHz single-mode band of the WR10 wavegui de.