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Quad-polarization multi-beam folded transmitarray in Ku-band.

Pei Yang, Bo Dang, Lipin Li

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    Summary
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    We developed a quad-polarization multi-beam folded transmitarray (QPMBFTA) using novel metasurfaces. This technology enables quad-polarization multi-beam radiation, enhancing channel capacity for wireless communication systems.

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    Area of Science:

    • Electromagnetics and Metamaterials
    • Antenna Theory and Design
    • Wireless Communication Systems

    Background:

    • Metasurfaces offer unique electromagnetic properties for advanced antenna designs.
    • Achieving multi-polarization and multi-beam capabilities is crucial for increasing wireless communication capacity.
    • Existing transmitarray designs often face limitations in polarization flexibility and profile height.

    Purpose of the Study:

    • To propose and demonstrate a novel quad-polarization multi-beam folded transmitarray (QPMBFTA).
    • To integrate dual-linearly polarized transmission metasurface (DLPTM) and polarization conversion metasurface (PCM) for enhanced performance.
    • To achieve independent control over phase distributions for multi-beam radiation with uniform energy.

    Main Methods:

    • Design of a multi-layer DLPTM using stacked metal patches and annular slots for wave manipulation.
    • Integration of a PCM to control phase distribution and reduce the overall profile height.
    • Application of phase weighting and aperture field superposition methods for independent phase control in x and y directions.

    Main Results:

    • Experimental fabrication and measurement of the QPMBFTA in the Ku-band.
    • Achieved peak gains: 17.5 dBi (XP), 16.9 dBi (YP), 17.5 dBic (LHCP), and 17.0 dBic (RHCP).
    • Demonstrated 3dB axial ratio bandwidths of 12.9-14.5 GHz (LHCP) and 13.0-14.3 GHz (RHCP).

    Conclusions:

    • The proposed QPMBFTA successfully achieves quad-polarization multi-beam radiation with high gain and wide bandwidth.
    • The integrated DLPTM and PCM design offers a compact and efficient solution for advanced antenna requirements.
    • This technology holds significant potential for improving channel capacity in multichannel wireless communication systems.