Highly sensitive microwave electrometry with enhanced instantaneous bandwidth

Rydberg microwave electrometry has attracted great attention, due to its potential application in radar and communication, but simultaneously achieving high sensitivity and broad instantaneous bandwidth remains a challenge. This study demonstrates an enhanced instantaneous bandwidth of \ifmmode\pm\else\textpm\fi{}10.2 MHz with sensitivity of 62 nV cm${}^{\ensuremath{-}1}$ Hz${}^{\ensuremath{-}1/2}$ by the amplification of one sideband wave in the six-wave-mixing process of a Rydberg superheterodyne receiver.