RFID Ultra-High Frequency Tag Antenna Based on SRR Resonant Superstrate

Area of Science:

• Electromagnetics and Antenna Theory
• Radio Frequency Identification (RFID) Technology

Background:

• Current ultra-high frequency (UHF) RFID tag antennas face limitations in communication range, hindering practical applications.
• Extending the read range is crucial for efficient logistics, asset management, and smart warehousing solutions.

Purpose of the Study:

• To introduce and validate a novel UHF RFID tag antenna technology utilizing a resonant superstrate.
• To enhance the gain and communication range of UHF RFID folded dipole antennas.

Main Methods:

• Development of a finite element model for a UHF RFID folded dipole antenna.
• Design and implementation of a two-element Split-Ring Resonator (SRR) resonant superstrate.
• Application of resonance and near-field coupling principles for antenna gain enhancement.
• Multi-parameter joint optimization of the SRR superstrate configuration and structural parameters.

Main Results:

• The proposed SRR resonant superstrate effectively regulates the dipole antenna's performance.
• Simulations and experimental measurements demonstrated a maximum forward reading distance enhancement of 62.1% within the 920-925 MHz band.
• The technology significantly improves UHF RFID tag performance in complex environments.

Conclusions:

• The novel SRR resonant superstrate technology offers a viable solution for extending UHF RFID communication range.
• This advancement enables more stable and efficient long-range identification, benefiting various industrial applications.
• The findings contribute to the practical deployment of advanced RFID systems for enhanced tracking and management.