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Split Ring Antennas and Their Application for Antenna Miniaturization.

Yanxia Liu1, Lotfollah Shafai1, Dustin Isleifson1,2

  • 1Department of Electrical & Computer Engineering, University of Manitoba, Winnipeg, MB R3T 5V6, Canada.

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|January 21, 2023
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Summary
This summary is machine-generated.

Split ring antennas on low-permittivity substrates offer significant miniaturization, achieving over 25 times the performance of high-permittivity antennas. This enhanced miniaturization maintains antenna performance, including gain and bandwidth.

Keywords:
antenna miniaturizationdielectric resonator antennamodified split ring resonatorsplit ring resonator

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Area of Science:

  • Electromagnetics and Antennas
  • Materials Science for RF Applications

Background:

  • Dielectric resonator antennas (DRAs) are crucial for miniaturized RF devices.
  • Achieving significant miniaturization in DRAs often leads to performance degradation.

Purpose of the Study:

  • To investigate the miniaturization capability of split ring array antennas on low-permittivity substrates.
  • To compare their performance against high-permittivity DRAs.
  • To analyze the impact of split ring parameters on miniaturization and performance.

Main Methods:

  • Simulating split ring array antennas on a fixed-size, low-permittivity dielectric substrate (permittivity = 2.2).
  • Varying split ring configurations to study unit cell resonant frequency and induced permeability.
  • Comparing simulation results with high-permittivity DRAs and modified split ring designs.
  • Fabricating and testing a split ring antenna to validate simulation findings.

Main Results:

  • Miniaturization capability increases with decreased unit cell resonant frequency and/or increased induced permeability.
  • Achieved miniaturizations up to 25.54 times that of high-permittivity DRAs.
  • Miniaturized antennas maintained high gain and wide impedance bandwidth without significant performance deterioration.
  • Experimental results showed good agreement with simulations.

Conclusions:

  • Incorporating resonant metallic inclusions (split rings) into low-permittivity DRAs significantly enhances miniaturization.
  • This approach offers a viable method for developing highly miniaturized antennas without compromising essential performance parameters.
  • The findings provide a pathway for advanced antenna designs in space-constrained applications.