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A Compact and Robust RFID Tag Based on an AMC Structure.

Giovanni Andrea Casula¹, Giacomo Muntoni¹, Paolo Maxia²

¹Department of Electrical and Electronic Engineering, University of Cagliari, 09123 Cagliari, Italy.

Sensors (Basel, Switzerland)

|March 13, 2024

Summary

This study introduces a versatile Radio-Frequency Identification (RFID) tag adaptable to diverse surfaces. Its novel design achieves a long read range, enabling broad applications from wearables to metal object tracking.

Keywords:

AMC structures RFID tags human body coupling wearable antennas

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Area of Science:

Electrical Engineering
Electromagnetics
Antenna Design

Background:

Traditional RFID tags face performance limitations on diverse mounting surfaces.
Ungrounded antennas often require complex matching networks or shielding.
Platform tolerance is crucial for widespread RFID adoption in various environments.

Purpose of the Study:

To develop a platform-tolerant RFID tag capable of operating across the entire RFID spectrum.
To enhance RFID tag performance on challenging surfaces like metal and human bodies.
To achieve a significant read range with a simple, cost-effective design.

Main Methods:

Design and simulation of a novel RFID tag antenna using CST Studio Suite.
Integration of a small Artificial Magnetic Conductor (AMC) as a shielding element.
Tuning the antenna to operate across the global RFID frequency band.

Main Results:

The RFID tag demonstrates platform tolerance on dielectric, metallic, and biological surfaces.
A maximum theoretical read range exceeding 11 meters was achieved.
The design is characterized by its simplicity and potential for low-cost manufacturing.

Conclusions:

The proposed RFID tag offers a robust and versatile solution for various applications.
The AMC shielding effectively enhances antenna performance on diverse platforms.
This design facilitates cost-effective, long-range RFID implementation.