A monolithic GaAs HBT upconverter

摘要

A 2.6-GHz to 5.5-GHz upconverter mixer has been implemented with GaAs heterojunction bipolar transistor (HBT) IC technology. The upconverter consists of a transconductance multiplier based on a Gilbert cell topology, followed by a two-stage Darlington-coupled amplifier. Measured conversion gain is greater than 20 dB up to an RF output frequency of 5.5 GHz. This upconverter is believed to be the first reported using the GaAs HBT technology.