The MM20421 from Teledyne Microwave Solutions is a RF Mixer with RF Frequency 4000 to 20000 MHz, LO Frequency 4000 to 20000 MHz, IF Frequency 0 to 2000 MHz, Conversion Loss 7.5 dB, LO Drive - Power 10 dB. Tags: Surface Mount. More details for MM20421 can be seen below.