Scalar and Tensor Holographic Artificial Impedance Surfaces
Scalar and Tensor Holographic Artificial Impedance Surfaces
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DOI：
10.1109/tap.2010.2055812
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发表时间：
2010-10-01
影响因子：
5.7
通讯作者：
Sievenpiper, Daniel F.
中科院分区：
文献类型：
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作者：
Fong, Bryan H.;Colburn, Joseph S.;Sievenpiper, Daniel F.
我们已经开发了一种方法来控制电磁表面波的传播和辐射从复杂的金属形状。该物体覆盖有人工阻抗表面，该人工阻抗表面被实现为在接地电介质基板上的亚波长金属贴片的阵列。我们通过改变金属贴片的大小来图案化表面上的有效阻抗。使用全息技术，我们设计的表面散射一个已知的输入波成所需的输出波。此外，通过改变贴片的形状，我们可以创建具有张量阻抗特性的各向异性表面，从而提供对极化的控制。作为一个例子，我们展示了张量阻抗表面，产生圆偏振辐射的线偏振源。
We have developed a method for controlling electromagnetic surface wave propagation and radiation from complex metallic shapes. The object is covered with an artificial impedance surface that is implemented as an array of sub-wavelength metallic patches on a grounded dielectric substrate. We pattern the effective impedance over the surface by varying the size of the metallic patches. Using a holographic technique, we design the surface to scatter a known input wave into a desired output wave. Furthermore, by varying the shape of the patches we can create anisotropic surfaces with tensor impedance properties that provide control over polarization. As an example, we demonstrate a tensor impedance surface that produces circularly polarized radiation from a linearly polarized source.