The CHR3894-98F from United Monolithic Semiconductors is a RF Mixer with RF Frequency 37.00-40.00 GHz, LO Frequency 17.50-21.00 GHz, IF Frequency DC-3.5 GHz, Conversion Loss 13 dB, LO Drive - Power 0 dBm. Tags: Die, Down-Conversion Mixer. More details for CHR3894-98F can be seen below.