The HMC258 from Analog Devices is a RF Mixer with RF Frequency 14 to 21 GHz, LO Frequency 7.25 to 10 GHz, IF Frequency DC to 3 GHz, Conversion Loss 10 dB, P1dB -3 dBm. Tags: Surface Mount, Sub-Harmonic Mixer. More details for HMC258 can be seen below.