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<p>A multi-layer metasurface (MTS) design is proposed in this paper, which simultaneously enables linear-to-circular (LTC) polarization conversion and decoupling functionality for a 3 × 3 antenna array.The antenna operates in the sub-6&#xa0;GHz frequency band. By optimizing the multi-layer MTS structure, the polarization conversion layer and isolation layer work together to suppress inter-element coupling (isolation &gt; 20 dB) while efficiently converting linearly polarized (LP) signals into circularly polarized (CP) signals (axial ratio(AR) &lt; 3 dB), and achieving a relative bandwidth (BW) of 3.5%. The antenna array design, when integrated with the MTS structure, achieves both decoupling and LTC polarization conversion in the E-planes and H-planes, and its periodic structure facilitates scalability to larger arrays.</p>

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High isolation MIMO antenna based on metasurface for linear-circular polarization conversion and decoupling

  • 期刊论文

  • 出版模式：

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  • 发表日期：

    2026年1月23日

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  • Ting Wu,
  • Fang Ma,
  • Libin Wang,
  • Jing Wen

摘要

A multi-layer metasurface (MTS) design is proposed in this paper, which simultaneously enables linear-to-circular (LTC) polarization conversion and decoupling functionality for a 3 × 3 antenna array.The antenna operates in the sub-6 GHz frequency band. By optimizing the multi-layer MTS structure, the polarization conversion layer and isolation layer work together to suppress inter-element coupling (isolation > 20 dB) while efficiently converting linearly polarized (LP) signals into circularly polarized (CP) signals (axial ratio(AR) < 3 dB), and achieving a relative bandwidth (BW) of 3.5%. The antenna array design, when integrated with the MTS structure, achieves both decoupling and LTC polarization conversion in the E-planes and H-planes, and its periodic structure facilitates scalability to larger arrays.