The J4018M from Eclipse MDI is a RF Mixer with RF Frequency 4000 to 18000 MHz, LO Frequency 4000 to 18000 MHz, IF Frequency 0 to 4000 MHz, Conversion Loss 5.5 to 7.5 dB, LO Drive - Power 10 dBm. Tags: Double Balanced Mixer. More details for J4018M can be seen below.