40 GHz monolithic integrated mixer in SiGe bipolar technology

Future broadband wireless services will use carrier frequencies in the range of 10 GHz to about 42 GHz. This raises the demand for low-cost components of key RF building blocks like LNAs, mixers, and oscillators for frequencies up to 42 GHz. This work describes an active mixer in a pre-production 0.4 /spl mu/m SiGe bipolar technology with bandwidth in the range mentioned above. A gain of 25 dB and double-sideband noise figure of 15 dB is achieved at 40 GHz.