Power-Optimized Digitally Controlled Oscillator in 28-nm CMOS for Low-Power FMCW Radars

Abstract

This work presents the design of a 24 GHz DCO in an advanced 28-nm bulk CMOS technology for short-range Frequency-Modulated Continuous-Wave radar System-on-Chip for mobile and Internet-of-Things devices. The power minimization is therefore the primary focus. The oscillator consumes a record low power of 1.2 mW at a 0.65 V supply voltage. It achieves a very large frequency tuning range of 5.8 GHz (27%) and a 150 kHz resolution without significantly degrading the phase noise. The proposed design methodology results in a State-of-the-Art −193 dBc/Hz FoMT.

A High Precision Vital Signs Detection Method Based on Millimeter Wave Radar

“…Frequency modulated continuous wave (FMCW) radars have been successful in non-contact vital signs detection 11±13 due to their excellent range resolution 14 , compact size, and low power consumption 15 . These characteristics make FMCW radar not only provide an efficient alternative to existing medical monitoring methods and open up new possibilities in the field of medical and health monitoring.…”