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Summary
This summary is machine-generated.

This study introduces a hybrid method using Pancharatnam-Berry (PB) phase to create multiple vortex beams from planar microstrip arrays. This technique enables dual-linearly polarized (dual-LP) beams for enhanced wireless and radar communication systems.

Keywords:
antenna arraymultiple beamsorbital angular momentum (OAM)vortex beam

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Area of Science:

  • Electromagnetics and Applied Physics
  • Antenna Theory and Design

Background:

  • Generating multiple vortex beams from planar microstrip arrays presents significant challenges.
  • Existing methods struggle with decoupling orthogonal circularly polarized vortex beams.

Purpose of the Study:

  • To propose a hybrid method combining Pancharatnam-Berry (PB) phase for generating multiple vortex beams.
  • To design and experimentally verify planar microstrip arrays capable of producing quad vortex beams with different topological charges.

Main Methods:

  • A hybrid approach utilizing PB phase induced by rotation and feeding line excitation.
  • Theoretical design of two 8x8 planar arrays for X-band operation.
  • Fabrication and experimental analysis of a planar array using rectangular patch elements with dual-layer feeding networks (proximity and aperture coupling).

Main Results:

  • Successful realization of dual-linearly polarized (dual-LP) beams with quad-vortex-beam characteristics from 8 to 12 GHz.
  • Measured bandwidths of over 33.4% (S11 < -10 dB) and 29.2% (S22 < -10 dB).
  • Isolation between ports exceeding -28 dB.

Conclusions:

  • The proposed hybrid method effectively decouples orthogonal circularly polarized vortex beams.
  • The developed planar arrays offer a promising solution for high-capacity and integrated wireless and radar communication systems.