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HFSS Simulation Review Request: 5x5 Reconfigurable Intelligent Surface Array with Parametric Sweep of Dimension and Magnetic Bias����

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Ansys HFSS Help

Date-08.03.26

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Introduction

  • Reconfigurable Intelligent Surfaces (RIS) introduce a new wireless paradigm by enabling programmable control of the EM wave propagation.

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  • My research focus is to develop RIS harnessing magnetism. For this purpose, I chose Yttrium Iron Garnet (YIG) as magnetic material and phase shifts are obtained by tuning the material properties by applying magnetic bias.

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  • My current workflow is calculating required phase shift to beamform along a direction and creating a codebook and validate by creating antenna array simulations and finally manually designing the array.

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  • Problems:
    • Results from antenna array simulation and manually created array simulation do not match.
    • Is the method explained in this presentation correct?

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Creating optimized Phased Array

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  • Array using Codebook (antenna array setup)

(θ,Φ) = (30o, 0o)

(θ,Φ) = (30o, 0o)

  • Manually created array from dimension sweep

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The process of manually created RIS Array.

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  • First I create one unit cell with variable patch dimensions, and assign floquet port and apply de-embedding to place the port at unit cell face.

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The process of manually created RIS Array.

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  • I sweep the patch dimensions and get the S11 magnitude and phase. I take Phases of all dimension combinations at 10 GHz frequency and make a phase vs dimension lookup table.

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The process of manually created RIS Array.

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  • Then, I take Codebook and find the unit cell dimensions required for the phase delays in the codebook to beamform at (θ,Φ) = (30o, 0o).
  • Then create the array manually. Add feed antenna and radiation boundary and complete simulation.

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