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<p>This communication explores and builds a two-terminal&#xa0;dielectric&#xa0;array radiator running in&#xa0;mm-wave regime. Three different features improve the planned radiator performance: (a) 1&#xa0;×&#xa0;4 array design improves the gain level to 10.0&#xa0;dBi; (b) orthogonal placement of two-terminals improves the separation level to 25&#xa0;dB; and (c) a metasurface suspension above the radiator converts the linear waves into circular waves in between 30.91&#xa0;GHz and 31.75&#xa0;GHz, and the double negative group (DNG) nature of the metasurface further improves the gain level to 14.0 dBi. Testing of the fabricated prototype confirms its working in between 30.73&#xa0;GHz and 32.56&#xa0;GHz. With its broadside far-field&#xa0;and excellent envelope correlation coefficient (below 0.1)/diversity gain, the planned radiator&#xa0;may be used for 5G mm-wave devices in&#xa0;the n257 spectrum.</p>

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Metasurface-Loaded Circularly Polarized Al2O3 Dielectric Built MIMO Array Radiator in mm-Wave Regime

  • 期刊论文

  • 发表日期：

    2025年9月26日

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  • Pankaj Kumar,
  • Lalit Kumar

摘要

This communication explores and builds a two-terminal dielectric array radiator running in mm-wave regime. Three different features improve the planned radiator performance: (a) 1 × 4 array design improves the gain level to 10.0 dBi; (b) orthogonal placement of two-terminals improves the separation level to 25 dB; and (c) a metasurface suspension above the radiator converts the linear waves into circular waves in between 30.91 GHz and 31.75 GHz, and the double negative group (DNG) nature of the metasurface further improves the gain level to 14.0 dBi. Testing of the fabricated prototype confirms its working in between 30.73 GHz and 32.56 GHz. With its broadside far-field and excellent envelope correlation coefficient (below 0.1)/diversity gain, the planned radiator may be used for 5G mm-wave devices in the n257 spectrum.