The HMC951A from Analog Devices is a RF Mixer with RF Frequency 5.6 to 6 GHz, LO Frequency 4.5 to 12.1 GHz, IF Frequency DC to 3.5 GHz, Image Rejection 20 to 32 dBc, Conversion Gain 10 to 13 dB. Tags: Surface Mount, I/Q Mixer, Down-Conversion Mixer, Image Reject Mixer. More details for HMC951A can be seen below.