A 0.1-23-GHz SiGe BiCMOS analog multiplier and mixer based on attenuation-compensation technique

A SiGe BiCMOS broadband mixer and analog multiplier using LC ladder matching networks and attenuation-compensation method were first proposed. This broadband mixer achieves measured conversion gain of 19 dB with a 3-dB bandwidth from 0.1 to 23 GHz. The mixer was fabricated in a commercial 0.35-μm SiGe BiCMOS technology and demonstrated the highest gain-bandwidth product of operation among previously reported MMIC mixers. As an analog multiplier, the measured sensitivity is better than 3000 V/W from 0.1 to 25 GHz with 50-Ω output impedance. The chip area is 1.5×1 mm² including testing pad. The performance of this circuit represents a state-of-the-art result of the MMIC broadband mixers using standard silicon-based technologies.