Non-contact Vital Sign and Motion Detection Sensor


Proposed SRO integrated MTM LWA for multi-target vital sign detection

Invention Summary:

It is essential to keep track of one’s respiration rate (RR) and heart rate (HR) for a healthier life.  Existing real-time cardiovascular disease monitoring methods are mostly based on wearable solutions, such as finger pulse meters, smart watches, electrocardiograms, However, these wearables require a direct contact with the patient and can only obtain one single vital sign information at a time, besides,  it may cause discomfort, skin damage, and hygiene issues. Certain radar sensing techniques, such as multiple-input multiple-output (MIMO) allow multi-target, non-contact mode vital sign monitoring. However, these techniques increase the cost of testing and have complex control schemes which limits their use.

Rutgers researchers have developed a non-contact sensor based on Doppler radar sensor for multi- target vital sign such as heart rate and respiration rate. The sensor utilizes metamaterial leaky wave antenna (MTM-LWA) integrated with a super-regenerative oscillator (SRO) architecture. Furthermore, compared with MTM-LWA radar sensor based on the self-injection-locked (SIL) architecture, vibrating motion at a farther distance can be detected accurately using the proposed radar sensor, indicating a higher sensitivity with reduced system complexity.

Related Technology: MonitoringVital Signs Of Multiple Persons Via Single Phased-MIMO Radar



  • Multi-target vital sign detection
  • Vibration detection
  • Location and velocity detection

Market Applications:

  • Driver alertness
  • Elderly care
  • Infant care
  • Demanding work environment- for instance stress monitoring

Intellectual Property & Development Status: 

Provisional patent application filed, patent pending. Available for licensing and/or search collaboration. Please contact

Publications: 10.1109/TMTT.2019.2931834;  10.1109/JERM.2021.3119992; 10.1109/TMTT.2021.3053972


Patent Information:
Wenjuan Zhu
Licensing Manager
Rutgers, The State University of New Jersey
Sensors & Probes