The MI3831 from Advanced Microwave Inc is a RF Mixer with RF Frequency 12000 to 20000 MHz, Conversion Loss 8 to 10 dB, LO/RF Isolation 38 to 28 dB, LO/IF Isolation 40 to 33 dB, IM Supression LO/RF 14 to 20 dB. Tags: Module with Connectors, Image Reject Mixer. More details for MI3831 can be seen below.