The HMC557A from Analog Devices is a RF Mixer with RF Frequency 2.5 to 7 GHz, LO Frequency 2.5 to 7 GHz, IF Frequency DC to 3 GHz, Conversion Loss 8 to 10.5 dB, Noise Figure 8 to 8.5 dB. Tags: Surface Mount, Double Balanced Mixer. More details for HMC557A can be seen below.