The IR-4509 from Marki Microwave is a RF Mixer with RF Frequency 4.5 to 9 GHz, LO Frequency 4.5 to 9 GHz, IF Frequency 70±20 MHz, Image Rejection 23 dB, Conversion Loss 5.5 dB. Tags: Module with Connectors, Image Reject Mixer, Single Sideband Mixer. More details for IR-4509 can be seen below.