Model SWC-101F-R1 and SWC-101M-R1 are W band waveguide to 1 mm coaxial adapters. These adapters offer convenient mean for waveguide to coaxial line connection for full W band operations. Both WR-10 waveguide to 1mm (F) and WR-10 waveguide to1 mm (M) coax adapters have less than 1.0 dB insertion loss and better than 15 dB return loss from 75 to 110 GHz. The waveguide to coax adapter family is offered to cover the frequency range from 18 to 110 GHz.