The QIQ8-12-4 from Qualink Microwave is a RF Mixer with RF Frequency DC to 4 GHz, LO Frequency 8 to 12 GHz, IF Frequency DC to 4 GHz, Image Rejection 20 dBc, Conversion Loss 8 dB. Tags: Module with Connectors, I/Q Mixer. More details for QIQ8-12-4 can be seen below.