The HMC521ALC4 from Analog Devices is a RF Mixer with RF Frequency 8.5 to 13.5 GHz, LO Frequency 8.5 to 13.5 GHz, IF Frequency DC to 3.5 GHz, Image Rejection 17 to 27.5 dB, Conversion Loss 7.8 to 9.5 dB. Tags: Surface Mount, Double Balanced Mixer, Up-Conversion Mixer, Down-Conversion Mixer, I/Q Mixer. More details for HMC521ALC4 can be seen below.