TRAK has completed qualification and entered serial production of a low mass (11g, 0.4oz.) 2.9mm to WR51 transition designed for commercial avionics applications. Meeting IP67 requirements this is intended for airborne satellite communications systems. The device operates over a 5 GHz BW from 17 to 22 GHz to better than 21dB return loss and is available Nickel plated or painted.