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 _    _      ___      _  __     ___     ______   
| || | ||   / _ \\   | |/ //   / _ \\  |      \\ 
| || | ||  / //\ \\  | ' //   | / \ || |  --  // 
| \\_/ || |  ___  || | . \\   | \_/ || |  --  \\ 
 \____//  |_||  |_|| |_|\_\\   \___//  |______// 
  `---`   `-`   `-`  `-` --`   `---`   `------`

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Text this: A miniaturized rectangular cavity by three-dimentional (3D) anisotropic metamaterials