The HMC-C051 is a general purpose double balanced mixer housed in a miniature hermetic module that can be used as an upconverter or downconverter between 11 and 20 GHz. This mixer is fabricated in a GaAs MESFET process, and requires no external components or matching circuitry. The HMC-C051 provides excellent LO to RF and LO to IF isolation due to optimized balun structures. The module features removable SMA connectors which can be detached to allow direct connection of the I/O pins to a microstrip or coplanar circuit.