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Corner Reflector Based Misalignment-Tolerant Chipless RFID Tag Design Methodology.

Katelyn R Brinker¹, Reza Zoughi¹

¹The authors are with the Department of Electrical and Computer Engineering (ECpE) and Center for Nondestructive Evaluation (CNDE), Iowa State University, Ames, IA 50011 USA.

IEEE Journal of Radio Frequency Identification

|March 3, 2022

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This study introduces a novel chipless radio frequency identification (RFID) tag design that overcomes misalignment sensitivity. The new design ensures reliable identification and sensing even with significant tag-reader antenna rotations.

Area of Science:

Electrical Engineering
Electromagnetics
Radio Frequency Identification (RFID)

Background:

Chipless RFID technology offers unique advantages but suffers from misalignment sensitivity.
Misalignments between tag and reader antennas cause erroneous data, hindering practical applications.
Existing solutions primarily focus on post-processing, not tag design.

Purpose of the Study:

To propose a chipless RFID tag design methodology that enhances misalignment tolerance.
To develop tags resistant to pitch, yaw, and roll rotations.
To improve the reliability of chipless RFID for identification and sensing.

Main Methods:

Utilized trihedral corner reflector bases loaded with resonators.
Designed tags for tolerance to pitch (±40°), yaw (±40°), and roll (±180°) rotations.

Keywords:

Chipless RFID corner reflector misalignment tolerant

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Employed linearly polarized monostatic reading schemes.

Main Results:

Achieved significant misalignment tolerance, enabling orientation independence.
Demonstrated a large radar cross-section for enhanced tag detectability.
Obtained a deep resonance depth, improving response reliability.

Conclusions:

The proposed tag design methodology effectively addresses misalignment challenges in chipless RFID.
This approach enhances the robustness and practicality of chipless RFID systems.
The design facilitates reliable identification and sensing applications despite orientation variations.