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Updated: Jun 27, 2025

Harmonic Radar Tags for Insect Tracking: Lightweight, Low-cost, and Accessible

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Harmonic FMCW Radar System: Passive Tag Detection and Precise Ranging Estimation.

Ahmed El-Awamry^1,2, Feng Zheng¹, Thomas Kaiser¹

¹Institute of Digital Signal Processing, University of Duisburg-Essen, 47057 Duisburg, Germany.

Sensors (Basel, Switzerland)

|April 27, 2024

Summary

This summary is machine-generated.

This study presents a low-power harmonic frequency-modulated continuous-wave (FMCW) radar system for precise harmonic tag detection and ranging. The system demonstrates robust accuracy and self-interference mitigation in real-world tests.

Keywords:

harmonic FMCW radar measurement passive harmonic transponder power consumption range estimation simulation

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Area of Science:

Electrical Engineering
Radar Systems Engineering
Microwave Engineering

Background:

Harmonic radar systems offer unique capabilities for tag detection and ranging.
Challenges exist in designing and implementing such systems, including component selection, calibration, and signal processing.

Purpose of the Study:

To design and implement a harmonic frequency-modulated continuous-wave (FMCW) radar system for harmonic tag detection and precise range estimation.
To develop and assess a novel single-layer passive harmonic tag.
To analyze system performance, including power consumption and ranging accuracy.

Main Methods:

Design and implementation of a harmonic FMCW radar system operating in the 2.4-2.5 GHz (forward) and 4.8-5.0 GHz (backward) bands.
Development of a single-layer passive harmonic tag.
Theoretical analysis, simulations, and experimental evaluations in an indoor environment.

Main Results:

The developed harmonic FMCW radar system achieves precise range estimation and effective harmonic tag detection.
The system exhibits low power consumption, suitable for short-range applications.
Experimental results validate robust ranging accuracy and self-interference mitigation capabilities.

Conclusions:

The designed harmonic FMCW radar system, coupled with the novel passive tag, shows significant potential for various tag detection and ranging applications.
The system effectively addresses challenges in component selection, calibration, signal processing, and integration.
The study confirms the system's viability for real-world indoor environments.