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Related Concept Videos

Series Resonance01:17

Series Resonance

941
The RLC circuit impedance is defined as the ratio of the supply voltage to the circuit current. Resonance in such a circuit occurs when the imaginary part of this impedance equals zero. This specific condition means that the inductive reactance is exactly equal to the capacitive reactance. The frequency at which this happens is known as the resonant frequency. Mathematically, the resonant frequency is inversely proportional to the square root of the product of the inductance (L) and capacitance...
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Parallel Resonance01:23

Parallel Resonance

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The parallel RLC circuit is an arrangement where the resistor (R), inductor (L), and capacitor (C) are all connected to the same nodes and, as a result, share the same voltage across them. The parallel RLC circuit is analyzed in terms of admittance (Y), which reflects the ease with which current can flow. The admittance is given by:
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Super-resolution fluorescence microscopy (SRFM) provides a better resolution than conventional fluorescence microscopy by reducing the point spread function (PSF). PSF is the light intensity distribution from a point that causes it to appear blurred. Due to PSF, each fluorescing point appears bigger than its actual size, and it is the PSF interference of nearby fluorophores that causes the blurred image. Various approaches to achieving higher resolution through SRFM have recently been...
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Fabrication and Characterization of Superconducting Resonators
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RFID Ultra-High Frequency Tag Antenna Based on SRR Resonant Superstrate.

Zhenhao Huang1, Minghan Ke1, Haonan Zhang1

  • 1Hubei Engineering Research Center for Safety Monitoring of New Energy and Power Grid Equipment, Hubei University of Technology, Wuhan 430068, China.

Sensors (Basel, Switzerland)
|February 27, 2026
PubMed
Summary

This study enhances radio frequency identification (RFID) tag antenna performance using a novel Split-Ring Resonator (SRR) superstrate. This technology significantly boosts the reading distance of UHF RFID tags by up to 62.1%.

Keywords:
RFIDSRRantennaregulation and controlultra-high frequency

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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.