Demonstration of MIMO High-Scanning-Rate Coupled-Resonator Antennas for 2-D Multitarget Localization and Heartbeat Rate Monitoring

This paper proposes a multi-input multi-output (MIMO) high-scanning-rate coupled-resonator antennas at millimeter-wave frequency band for 2-D multi-target localization and heartbeat rate monitoring. The designed coupled-resonator antenna is able to vertically scan beam across a 470angular range as frequency changes from 60GHz to 64GHz, while 3Tx×4Rx MIMO technology can achieve digital beam scanning in the horizontal direction. So the proposed MIMO coupled-resonator antennas can achieve 2-D multi-target localization and heart rate monitoring as illustrated in Fig.1. By integrating the designed MIMO antenna prototype in an FMCW radar system, four experimental examples are provided for proof-of-concept demonstration. The results show that the proposed antenna can successfully localize multiple targets in 2-D space and accurately monitor the heartbeat rate.