The HMC144LC4 from Analog Devices is a RF Mixer with RF Frequency 6to20 GHz, LO Frequency 12 to 20 GHz, IF Frequency DC to 3 GHz, Conversion Loss 10 dB, LO Drive - Power 20 dBm. Tags: Surface Mount, Double Balanced Mixer. More details for HMC144LC4 can be seen below.