The BM13703 from Bracke Manufacturing is a RF Mixer with RF Frequency 5 to 18 GHz, LO Frequency 5 to 18 GHz, IF Frequency DC to 4 GHz, Conversion Loss 5.5 to 7.3 dB, LO Drive - Power 7 dBm. Tags: Module with Connectors, Double Balanced Mixer. More details for BM13703 can be seen below.