Super Heterodyne Mixer Front-End Module for Qubit Readout and Manipulation

Superconducting quantum circuit interfacing frequently entails working with multi-GHz radio frequency signals. The quickly evolving field relies on FPGA-based software-defined radio systems, providing the required flexible low-latency signal synthesis and analysis capabilities. Consequently, there are many custom hardware developments and upcoming commercial systems with proprietary interfaces. In contrast, this contribution presents a compact, platform-agnostic frequency conversion and level matching analogue front-end for 800 MHz vector signal generation, which expands the covered frequency band for any SMA connectorised system from baseband frequencies below 400 MHz to 4–10 GHz. It is in active use for quantum bit characterisation and for quantum sensor readout.