The HMC8108 is a compact X-Band MMIC converter that down converts a signal from 9 to 10 GHz at its input to a typical single-ended IF signals of 60 MHz at its output. This device provides a small signal conversion gain of 13 dB with a noise figure of 2 dB and image rejection of 20 dBc.
The HMC8108 uses a low noise amplifier followed by an image reject mixer that is driven by an active LO buffer amplifier. The image reject mixer eliminates the need for a filter following the low noise amplifier and removes thermal noise at the image frequency. I/Q mixer outputs are provided, and an external 90° hybrid is needed to select the required sideband.
