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首页> 外文会议>Metamaterials II; Proceedings of SPIE-The International Society for Optical Engineering; vol.6581 >Bidimensional Phase-varying Metamaterial for steering beam antenna
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Bidimensional Phase-varying Metamaterial for steering beam antenna

机译：转向波束天线的二维相变超材料

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摘要

Dielectric substrates supporting planar periodic subwavelength metamaterial-based metallic arrays and presenting frequency dispersive phase characteristics are applied to ultra-compact high-gain and high-directivity planar antennas. In this paper, different models of metamaterial-based surfaces introducing a zero degree reflection phase shift to incident waves are firstly studied numerically using finite-element method analysis where the bandwidth and operation frequency are predicted. These surfaces are then applied in a resonant Fabry-Perot type cavity and a ray optics analysis is used to design different models of ultra-compact high-gain microstrip printed antennas. Firstly, a cavity antenna of thickness λ/60 based on the use of a microstrip patch antenna and two bidimensional metamaterial-based surfaces, the first one acting as a High Impedance Surface (HIS) and the second one acting as a Partially Reflecting Surface (PRS) is designed. This cavity is then optimized for easier fabrication process and loss reduction by the use of only one bidimensionnal composite metamaterial-based surface acting as a PRS. Secondly, another surface presenting a variable phase by the use of a non periodic metamaterial-based metallic strips array is designed for a passive low-profile steering beam antenna application. Finally, a switchable operation frequency cavity by the implementation of varicap diodes is designed and fabricated. All these cavity antennas operate on subwavelength modes, the smallest cavity thickness being of the order of λ/60.
机译：支持平面周期亚波长基于超材料的金属阵列并具有频率色散相位特性的介电基板被应用于超紧凑型高增益和高指向性平面天线。在本文中，首先使用有限元方法分析了预测超宽带和工作频率的基于超材料的表面模型，这些模型将零度反射相移引入了入射波。然后将这些表面应用到谐振Fabry-Perot型腔中，并使用射线光学分析来设计不同型号的超紧凑型高增益微带印刷天线。首先，基于微带贴片天线和两个基于超材料的二维表面的厚度为λ/ 60的腔天线，第一个用作高阻抗表面（HIS），第二个用作部分反射表面（ PRS）。然后，通过仅使用一个充当PRS的基于二元复合材料的超材料为基础的表面来优化此腔体，以简化制造过程并减少损耗。其次，通过使用非周期性的基于超材料的金属带阵列来呈现可变相位的另一个表面被设计用于无源低剖面转向波束天线应用。最后，通过变容二极管的实现，设计并制造了一个可切换的工作频率腔。所有这些腔天线都在亚波长模式下工作，最小腔厚度约为λ/ 60。

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