The SFB-19-E2 from ERAVANT is a RF Mixer with RF Frequency 40 to 60 GHz, LO Frequency 40 to 60 GHz, IF Frequency DC to 20 GHz, Conversion Loss 11 dB, LO Drive - Power 10 to 13 dBm. Tags: Module with Connectors, Single Balanced Mixer. More details for SFB-19-E2 can be seen below.