The HMC523 from Analog Devices is a RF Mixer with RF Frequency 15 to 23.6 GHz, LO Frequency 21 to 23 GHz, IF Frequency DC to 3.5 GHz, Image Rejection 27 dB, Conversion Loss 8 dB. Tags: Surface Mount, I/Q Mixer, Image Reject Mixer. More details for HMC523 can be seen below.