Sensors, Vol. 24, Pages 2541: Harmonic FMCW Radar System: Passive Tag Detection and Precise Ranging Estimation

Sensors, Vol. 24, Pages 2541: Harmonic FMCW Radar System: Passive Tag Detection and Precise Ranging Estimation Sensors doi: 10.3390/s24082541 Authors: Ahmed El-Awamry Feng Zheng Thomas Kaiser Maher Khaliel This paper details the design and implementation of a harmonic frequency-modulated continuous-wave (FMCW) radar system, specialized in detecting harmonic tags and achieving precise range estimation. Operating within the 2.4–2.5GHz frequency range for the forward channel and 4.8–5.0GHz for the backward channel, this study delves into the various challenges faced during the system’s realization. These challenges include selecting appropriate components, calibrating the system, processing signals, and integrating the system components. In addition, we introduce a single-layer passive harmonic tag, developed specifically for assessing the system, and provide an in-depth theoretical analysis and simulation results. Notably, the system is characterized by its low power consumption, making it particularly suitable for short-range applications. The system’s efficacy is further validated through experimental evaluations in a real-world indoor environment across multiple tag positions. Our measurements underscore the system’s robust ranging accuracy and its ability to mitigate self-interference, showcasing its significant potential for applications in harmonic tag detection and ranging.
Source: Sensors - Category: Biotechnology Authors: Tags: Article Source Type: research