Self-Injection-Locked (SIL) Radars Using Frequency Modulation (FM) Techniques for Concurrent Range and Vital Sign Monitoring

Abstract

The self-injection-locked (SIL) radar introduced in 2009, has excellent sensitivity, stationary clutter cancelling capability, and low system complexity, and it continues to be a focus of research. This paper reviews several recent approaches that combine SIL and frequency-modulated continuous-wave (FMCW) techniques for simultaneous human localization and vital sign detection in health-care applications. In addition to describing the hardware architecture, the corresponding signal processing algorithms are summarized.