The CHM1290-99F from United Monolithic Semiconductors is a RF Mixer with RF Frequency 20.00-30.00 GHz, LO Frequency 10.00-15.00 GHz, IF Frequency DC-6.00 GHz, Conversion Loss 10 dB, LO Drive - Power -4 dBm. Tags: Die. More details for CHM1290-99F can be seen below.