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首页> 外文期刊>Applied Computational Electromagnetics Society journal >Design of All-Dielectric Half-wave and Quarter-wave Plates Microwave Metasurfaces Based on Elliptic Dielectric Resonators
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Design of All-Dielectric Half-wave and Quarter-wave Plates Microwave Metasurfaces Based on Elliptic Dielectric Resonators

机译：基于椭圆介电共振器的全介电半波和四分之一波片微波超表面的设计

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摘要

In this paper, we propose a numerical study for the design of Quarter-Wave Plate (QWP) and Half-Wave Plate (HWP) all-dielectric metasurfaces of relative permittivity 10.2, loss tangent 0.003 and thickness 5.12 mm. The devices based on Elliptic Dielectric Resonators (EDRs) may operate in the microwave band 20-30 GHz. First, we have studied the variation of the metasurface transmission, under x- and y-polarizations of the incident electric fields, when we vary the resonator ellipticity tau in the range 1:1.94. Next, we have optimized the resonator orientation (the rotation angle 0 is situated in the range 0: 450) to improve further the moduli of transmission coefficients. Finally, from these previous parametric studies, we have designed QWP and HWP metasurfaces with the selected ellipticities tau(1)=1.4 and tau(2)=1.6. For example, we have obtained for ellipticity tau(1), that the metasurface may acts as HWP device at frequencies 26.08 GHz and 28.03 GHz with bandwidths 175 MHz and 75 MHz, respectively and as QWP device at 29.02 GHz with a bandwidth of 150 MHz. In addition, the transmission bandwidths of HWP metasurface was increased from 75 to 225 MHz when we vary the rotation angle of the EDR from theta= 0 degrees to 10 degrees.
机译：在本文中，我们提出了对介电常数为10.2，损耗角正切值为0.003，厚度为5.12 mm的四分之一波片（QWP）和半波片（HWP）全介电亚表面设计的数值研究。基于椭圆介电谐振器（EDR）的设备可以在20-30 GHz微波频带中运行。首先，我们研究了当我们在1：1.94范围内改变谐振器椭圆率tau时，在入射电场的x和y极化下，超表面传输的变化。接下来，我们优化了谐振器的方向（旋转角0在0：450的范围内），以进一步改善传输系数的模量。最后，从这些先前的参数研究中，我们设计了具有选定椭圆率tau（1）= 1.4和tau（2）= 1.6的QWP和HWP超表面。例如，对于椭圆度tau（1），我们已经获得了超颖表面在带宽为175 MHz和75 MHz的26.08 GHz和28.03 GHz频率下作为HWP设备以及在带宽为150 MHz的29.02 GHz的QWP设备。此外，当我们将EDR的旋转角度从theta = 0度更改为10度时，HWP超表面的传输带宽从75 MHz增加到225 MHz。

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