The M1971E from Keysight is a waveguide harmonic mixer that can be used with the Kysight X-Series signal analyzers. It is available in two frequency options &ndash 55 GHz to 90 GHz and 60 GHz to 90 GHz. It has an IF frequency of between 100 MHz to 2.5 GHz. This mixer is ideal for 5G applications, WiGig/802.11ad, automotive radar and backhaul systems which require wideband millimeter-wave signal analysis of more than 2 GHz. The mixer has an excellent conversion loss and amplitude accuracy.