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Polarization-Reconfigurable Metasurface Antenna Design for Drone Terminals Based on Characteristic Mode Analysis.

Shiquan Zhang1, Hao Yu2, Xianqiong Wen1

  • 1School of Intelligent Science and Engineering, Xi'an Peihua University, Xi'an 710125, China.

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Summary
This summary is machine-generated.

This study introduces a novel polarization-reconfigurable metasurface antenna for drones, improving anti-jamming capabilities. Its mechanical switching mechanism offers reliable performance across multiple polarization states.

Keywords:
characteristic mode analysisdrone terminalsmetasurface antennamodal significancepolarization-reconfigurable

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Area of Science:

  • Electromagnetics and Metamaterials
  • Antenna Engineering
  • Wireless Communication Systems

Background:

  • Drones require robust anti-jamming capabilities and reliable operation in diverse environments.
  • Existing antenna solutions may suffer from losses or limited polarization flexibility, impacting performance.

Purpose of the Study:

  • To design, fabricate, and measure a novel polarization-reconfigurable metasurface antenna for drone applications.
  • To enhance anti-jamming performance and operational reliability of drone communication systems.

Main Methods:

  • Characteristic Mode Analysis (CMA) guided the antenna design, utilizing modal significance coefficients for optimization.
  • A mechanical rotation mechanism was developed for seamless switching between linear, left-hand circular, and right-hand circular polarization.
  • Simulated and measured results were compared to validate the design's effectiveness.

Main Results:

  • The metasurface antenna achieved a compact size (0.49λ × 0.49λ) with impedance bandwidth exceeding 29.9%.
  • Average gain ranged from 5.1 to 6.0 dBi across all polarization states.
  • High polarization purity was demonstrated with axial ratio bandwidth >10% (circular polarization) and cross-polarization discrimination >23 dB (linear polarization).

Conclusions:

  • The proposed polarization-reconfigurable metasurface antenna offers a robust and effective solution for modern sub-6 GHz 5G drone terminals.
  • The mechanical switching mechanism provides a loss-free alternative for polarization agility, enhancing operational reliability.
  • Simulated and measured data confirm the antenna's strong performance and suitability for demanding drone communication scenarios.