The QBM-50000-77000 from Qualwave is a Waveguide Mixer with RF Frequency 50 to 77 GHz, LO Frequency 50 to 77 GHz, IF Frequency DC to 20 GHz, Conversion Loss 10 to 12 dB, LO Drive Level 13 to 20 dBm. Tags: Balanced Mixer. More details for QBM-50000-77000 can be seen below.