Design of 24GHz Down-Conversion CMOS Mixer

摘要

This paper presents 24GHz down-conversion CMOS mixer for automotive collision avoidance radar. This circuit operates at the operation frequency of 24GHz, and it contains Gilbert-cell type. The proposed circuit is also implemented using TSMC 0.13μm mixed signal/RF CMOS technology (f_T/f_(max)=120/140GHz). The circuit is designed to have high conversion gain, low conversion loss and low noise figure at the supply voltage of 2V. The mixer used transmission lines instead of the real inductor to reduce total chip area and to get accurate line phase shift. The proposed circuit showed the highest conversion gain of 12dB, the highest input P_(1dB) of -2.4dBm, the highest FoM (figure of merit) of 15dB, the smallest power consumption of 4.5mW and the smallest chip size of 0.15×0.15mm~2 as compared to recently reported research results.