Key result
A 60-GHz CMOS Doppler radar sensor with an integrated V-band power detector achieved more than 25-dB automatic clutter cancellation and successful vital-signs detection at a distance over 1.2 m.
The developed 60-GHz CMOS Doppler radar sensor demonstrates effective automatic clutter cancellation and successful noncontact vital-signs detection at distances over 1.2 meters.
May enable non-contact vital signs monitoring; leaves open clinical validation before practice adoption.
This paper presents the design of a V-band logarithmic power detector (PD) and the integration with a 60-GHz CMOS vital-signs Doppler radar sensor to be incorporated with a microprocessor control unit (MCU) for fast automatic clutter cancellation. The PD adopts the successive detection logarithmic amplifier (SDLA) topology and achieves a high dynamic range by replacing the limited amplifiers with millimeter-wave (MMW) linear amplifiers. From the measurement results, the PD exhibits a dynamic range and logarithmic errors higher than 35 dB and within ±2 dB from 50 to 62 GHz. The whole integrated radar sensor chip is fabricated by a 90-nm CMOS process with a chip size of 2 mm × 2.34 mm and a dc power consuming of 243 mW. The radar chip and a 60-GHz 17-dBi patch-array antenna are integrated by bondwire interconnection on a compact single carrier board for experimental test. By incorporating the MCU to the radar chip board, the fast automatic clutter canceling can achieve more than 25-dB clutter cancellation. Moreover, it shows a successful vital-signs detection for a distance more than 1.2 m.
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Chou et al. (2017) studied this question. 60-GHz CMOS Doppler Radar Sensor with integrated V-band power detector was evaluated on Clutter cancellation and vital-signs detection distance. A 60-GHz CMOS Doppler radar sensor with an integrated V-band power detector achieved more than 25-dB automatic clutter cancellation and successful vital-signs detection at a distance over 1.2 m.
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