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Performance of Multiple-Feed Metasurface Antennas with Different Numbers of Patch Cells and Different Substrate Thicknesses

机译:贴片数量不同且基板厚度不同的多馈超表面天线的性能

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The design and performance of low-profile, multiple-feed metasurface antennas with different numbers of patch cells and different substrate thicknesses at a terahertz frequency are presented in this paper. The utilized antenna designs consist of a periodic array (N x M) metallic square-patch metasurface and a planar feeding structure, which are both patterned on an electrically thin, high-permittivity GaAs substrate. The antenna gain increased in a linear fashion with an increasing number of patch cells, which were directly fed by the slit feedline. A 3-dB gain increment was observed irrespective of the substrate thickness when the number of patch cells was doubled. However, the 3-dB gain bandwidth as well as the radiation efficiency changed significantly with varying substrate thicknesses. The described antenna structure offers useful characteristics by means of a combination of different substrate thicknesses and patch numbers. In addition, the proposed antenna design features a number of benefits, including a low profile, mechanical robustness, easy integration into circuit boards, and excellent suitability for low-cost mass production.
机译:本文介绍了在太赫兹频率下具有不同数量的贴片单元和不同基板厚度的低剖面多馈超表面天线的设计和性能。所使用的天线设计由周期阵列(N x M)金属方形贴片超表面和平面馈电结构组成,它们均在电薄,高介电常数的GaAs衬底上进行构图。天线增益随着贴片单元数量的增加以线性方式增加,这些贴片单元由狭缝馈线直接馈送。当贴片单元的数量增加一倍时,无论基板厚度如何,都能观察到3 dB的增益增量。但是,随着衬底厚度的变化,3 dB的增益带宽以及辐射效率会发生显着变化。所描述的天线结构通过不同基板厚度和贴片数量的组合提供有用的特性。另外,所提出的天线设计具有许多优点,包括外形小巧,机械坚固,易于集成到电路板中以及对低成本大规模生产的出色适应性。

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