High dynamic range SiGe downconverter with power efficient 50 Ω IF output buffer

This paper presents the design and measurement results of a high dynamic range down conversion mixer intended for use e.g. in W-CDMA. basestations. The mixer has been realized in Atmel´s 50 GHz f_t=f_max foundry SiGe technology. Power matching resistors at all three ports provide excellent broadband power match without need for external matching networks. Measured key performance parameters are a single sideband noise figure (SSB NF) of 12.9 dB, an output referred third order intercept point (OIP₃) of +30.1 dBm and an output referred compression point (P_-1dB) of +17.1 dBm.