Design of high-linearity 75-90 GHz CMOS down-conversion mixer for automotive radar

作者：Pan, Dongfang; Duan, Zongming; Huang, Lu; Wang, Yan; Zhou, Yang; Wu, Bowen; Sun, Liguo^*

来源：Analog Integrated Circuits and Signal Processing, 2018, 97(2): 313-322.

DOI：10.1007/s10470-018-1247-9

• W-band
• Down-conversion
• Millimeter-wave
• Mixer
• Linearity
• Passive device
• Automotive radar
• Conversion gain
• LO-RF isolation

This paper presents a 75-90 GHz down-conversion mixer applied in automotive radar, which is characterized with high linearity, low local oscillator (LO) drive as well as high conversion gain (CG) using TSMC 65-nm CMOS general-purpose technology. The good linearity and isolation of mixer are required for automotive radar to cover short-middle-far range detection. The mixer includes an enhanced double-balanced Gilbert-cell core with series peaking transmission line and source degeneration technique for improving linearity and CG, two on-chip baluns and intermediate frequency (IF) buffer for IF test. Besides, to make the design more accurate and efficient, the modeling and design of millimeter-wave (mm-wave) passive devices are introduced. The mixer consumes 12 mW under 1.5 V. The input 1 dB compression point (P-1dB) is 2.5 dBm as well as IIP3 of 13.2 dBm at 80 GHz. High performances are achieved with the CG of 5 dB at 76 GHz with LO power of 0 dBm for frequencies of 75-90 GHz which covers the application of automotive radar frequency band (76-81 GHz) and LO-RF isolation of 33-37 dB for frequencies of 60-90 GHz. The area of the mixer is 0.14 mm(2), with PADs included.

• 出版日期2018-11
• 单位中国科学技术大学; 中国科学院电工研究所