The HMC129ALC4 from Analog Devices is a RF Mixer with RF Frequency 4 to 8 GHz, LO Frequency 4 to 8 GHz, IF Frequency DC to 3 GHz, Conversion Loss 7 to 9 dB, Noise Figure 7 dB. Tags: Surface Mount, Double Balanced Mixer, Up-Conversion Mixer, Down-Conversion Mixer. More details for HMC129ALC4 can be seen below.