SoC CMOS UWB Pulse Radar Sensor for Contactless Respiratory Rate Monitoring

Abstract

An ultra wideband (UWB) system-on-chip radar sensor for respiratory rate monitoring has been realized in 90 nm CMOS technology and characterized experimentally. The radar testchip has been applied to the contactless detection of the respiration activity of adult and baby. The field operational tests demonstrate that the UWB radar sensor detects the respiratory rate of person under test (adult and baby) associated with sub-centimeter chest movements, allowing the continuous-time non-invasive monitoring of hospital patients and other people at risk of obstructive apneas such as babies in cot beds, or other respiratory diseases.

Planar Differential Antenna for Short-Range UWB Pulse Radar Sensor

“…The compliance of the transmitted pulse sequence with the FCC mask is also reported in [3]. The results of the field operational tests reported in [3] validated the effectiveness of the novel UWB planar differential antenna presented herein for the implementation of low-cost UWB pulse radars for short-range applications.…”

“…Field operational tests carried out in [3] demonstrated that the UWB radar sensor detects correctly sub-centimeter movements of targets (13×13, 13×26 and 26×26 cm) made of plasterboard covered by aluminum foil, as well as the movements of the chest due to the respiratory activity (including apneas) of the person under test, be they adults (both genders) or infants [3]. All the additional details about the field operational tests of the complete radar sensor can be found in [3]. The compliance of the transmitted pulse sequence with the FCC mask is also reported in [3].…”

“…The entire UWB pulse radar sensor was implemented by co-integrating the radar microchip above and two novel planar differential antennas (transmitting and receiving) designed and realized on FR4 substrate. This paper addresses the design, simulation and experimental characterization of the novel UWB antenna, which was not reported in our previous publications focused exclusively on the SoC implementation of the radar microchip [2], and on the functional and field operational tests for respiratory rate detections [3], whose results will be not repeated here.The paper is organized as follows. Section II reports the description of the novel antenna design.…”

Analysis of Phase Noise in 28 nm CMOS LC Oscillator Differential Topologies: Armstrong, Colpitts, Hartley and Common-Source Cross-Coupled Pair

“…[1][2][3][4][5] One of the most critical circuits of modern radiofrequency transceivers is the local oscillator, i.e., an autonomous circuit operating as the \pulsing heart" of such systems, in an analogy with the human body. As any other Despite these results provide a¯rst interesting perspective, this is limited by the comparison between a di®erential topology, i.e., cross-coupled common-source differential pair, and two single-ended topologies, Colpitts and Hartley.…”

Short-Range Vital Signs Sensing Based on EEMD and CWT Using IR-UWB Radar

“…In addition, Li et al reported a hybrid radar system combining the advantages of single-tone and FMCW radars [17]. With very high-range resolution owing to its wideband nature, IR-UWB radars have been efficiently implemented on silicon [18] and have the potential for realizing accurate detection of respiratory rate and apnea in adults and infants [19]. Above all, each type of radar system can implement the noncontact vital sign detection, depending on the specific application.…”