The HM3508 from HASCO Components is a RF Mixer with RF Frequency DC to 40 GHz, LO Frequency 25 to 40 GHz, IF Frequency DC to 8 GHz, Conversion Loss 10 to 13 dB, Noise Figure 0.5 dB. Tags: Module with Connectors, Double Balanced Mixer. More details for HM3508 can be seen below.