The MM1-1857L from Marki Microwave is a RF Mixer with RF Frequency 18 to 57 GHz, LO Frequency 18 to 57 GHz, IF Frequency DC to 21 GHz, Conversion Loss 8 to 13 dB, Noise Figure 0.5 dB. Tags: Module with Connectors, Double Balanced Mixer, Passive Mixer. More details for MM1-1857L can be seen below.