A concurrent 17/24 GHz low-noise amplifier for vital signs monitoring system

Abstract

This paper presents a concurrent 17/24 GHz low-noise amplifier (LNA) for a robust vital-sign radar detection application. Dual-band vital sign radar system is potentially resistant to multipath effects by analyzing the signal spectrum of human targets received at each individual frequency band. As an important component of the concurrent dual-band radar system, a high-performance dual-band LNA based on $0.13\mu \mathrm{m}$ CMOS process working at 17 GHz and 24 GHz is designed. The circuit topology consists of a notch amplifier and a wideband amplifier. A current reuse technology is employed to reduce the system power consumption. The post simulation results of the proposed LNA show that the $S_{11}$ and $S_{22}$ are both lower than −10 dB; gains of 13.6 dB and 11 dB, noise figure (NF) of 5.8 dB and 4.6 dB at 17 and 24 GHz, respectively. The chip area is $1030\times 700\ \mu \mathrm{m}^{2}$, and the current is 34.9 mA at 1.8 V.