The CHM1294-99F from United Monolithic Semiconductors is a RF Mixer with RF Frequency 35.00-45.00 GHz, LO Frequency 16.00-24.00 GHz, IF Frequency DC-3.00 GHz, Conversion Loss 11 dB, LO Drive - Power 10 dBm. Tags: Die. More details for CHM1294-99F can be seen below.