The MI3931 from Advanced Microwave Inc is a RF Mixer with RF Frequency 6000 to 18000 MHz, Conversion Loss 8 to 10 dB, LO/RF Isolation 32 to 25 dB, LO/IF Isolation 37 to 30 dB, IM Supression LO/RF 11 to 18 dB. Tags: Module with Connectors, Image Reject Mixer. More details for MI3931 can be seen below.