Model SWX-40360320-19-4B is a four port, 20 dB U-band full waveguide band crossguide coupler. Unlike most commercial available narrow band couplers, the new crossguide coupler covers full U band waveguide operation. The crossguide coupler exhibits less than 0.5 dB insertion loss, greater than 20 dB return loss, +/- 1 dB coupling flatness and better than 15 dB directivity over the entire 40 to 60 GHz frequency band.