Dual-band upconversion Gilbert mixer utilizing an LC current mirror

The SiGe HBT dual-band upconversion Gilbert mixer is demonstrated by using an LC current mirror load. A dual-band resonator is utilized to combine the differential current of each single-ended output. Moreover, the power improvement of the Gilbert upconverter is achieved by using the active matching network, the Darlington voltage buffer, in the output stage when compared to using a passive matching network.