Waveguide straights operate in 5.85GHz to 110GHz frequency range

PASTERNACK straight waveguide sections come in sizes ranging from WR-10 to WR-137, consisting of 62 models that operate in the frequency range of 5.85GHz to 110GHz and in 13 waveguide bands from C to W band. Devices also deliver VSWR as low as 1.03:1 and are available in section lengths from 3 inches to 12 inches and are made of either painted copper alloy or gold-plated, oxygen-free hard copper (OFHC) and feature UG, CPR and UBR-style flanges. https://www.pasternack.com