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    • 137. 发明授权
    • Isotropic metamaterial lens for magnetic imaging applications
    • 用于磁性成像应用的各向异性超材料透镜
    • US09140767B2
    • 2015-09-22
    • US13462384
    • 2012-05-02
    • Douglas H. WernerClara R. Baleine
    • Douglas H. WernerClara R. Baleine
    • G01R33/36G01N24/08G01R33/30G01R33/44
    • G01R33/36G01N24/084G01R33/302G01R33/441
    • Examples of the present invention include metamaterial lenses that allow enhanced resolution imaging, for example in MRI apparatus. An example metamaterial may be configured to have μ=−1 along three orthogonal axes. Superior performance was demonstrated using such improved designs, and in some examples, imaging resolution better than λ/500 was obtained. The use of one or more lumped reactive elements in a unit cell, such as one or more lumped capacitors and/or one or more lumped inductors, allowed unit cell dimensions and hence resolution to be dramatically enhanced. In some examples, a cubic unit cell was used with an essentially isotropic magnetic permeability of μ=−1 obtained at an operating electromagnetic frequency and wavelength (λ).
    • 本发明的实例包括允许增强分辨率成像的超材料透镜,例如在MRI装置中。 示例超材料可以被配置为沿着三个正交轴具有μ= -1。 使用这种改进的设计证明了优异的性能,并且在一些示例中,获得比λ/ 500更好的成像分辨率。 在诸如一个或多个集总电容器和/或一个或多个集总电感器之类的单元电池中使用一个或多个集总无功元件允许单元电池尺寸和因此分辨率被显着提高。 在一些实例中,使用在工作电磁频率和波长(λ)下获得的基本上各向同性磁导率μ= -1的立方晶胞。