The LTC5549 from Analog Devices is a RF Mixer with RF Frequency 2 to 14 GHz, LO Frequency 1 to 12 GHz, IF Frequency 500 to 6000 MHz, Conversion Loss 7 to 11.9 dB, Noise Figure 7.9 to 12.6 dB. Tags: Surface Mount, Double Balanced Mixer, Up-Conversion Mixer, Down-Conversion Mixer, Passive Mixer. More details for LTC5549 can be seen below.