Demonstration of Multi-Target Wireless Sensing Using High-Scanning-Rate Coupled-Patch Antenna

This paper proposes a frequency-diverse multi-target wireless sensing system for integrated sensing and communication (ISAC) applications. A coupled-patch antenna (CPA) with frequency-dependent beam scanning capability is employed as the key component for multi-target localization and respiration detection. Owing to the high scanning rate of $25.8^{\circ }$ per $1\%$ bandwidth, the designed CPA is able to continuously scan an angle range of $93^{\circ }$ across broadside as frequency varies from 3.26 GHz to 3.38 GHz, which well fits the ISAC application in Sub-6 GHz frequency. Four examples are given to demonstrate the benefit of high-scanning-rate CPA for multi-target localization, respiration detection, and surrounding interference mitigation.