Patent ID: 7688279

Claim:
A fractal structure body comprising: a three-dimensional fractal structure, partially or totally, the three-dimensional fractal structure including: a plurality of faces forming a plurality of pairs of parallel faces; a plurality of through-holes, one or more through-holes of the plurality of through-holes penetrating each face of the plurality of faces; and a plurality of primary structures each having a shape of a 1/S reduction of the three-dimensional fractal structure including the plurality of through-holes, S being an integer representing a ratio of a size of the three-dimensional fractal structure to a size of a primary structure of the plurality of primary structures, wherein an intersection of the plurality of through-holes with a face of the plurality of faces is an n/S reduction of the face, n being an integer greater than or equal to one and less than S, and wherein a stage number m of the three-dimensional fractal structure is greater than or equal to three, the stage number m being a level of hierarchy to which the fractal structure is repeated in a nested structure, wherein the fractal structure body has a local minimum value of at least one of a transmissivity for electromagnetic waves and a reflectivity for electromagnetic waves at a particular wavelength determined by structural factors and material factors of the three-dimensional fractal structure, wherein the structural factors include the stage number m, and wherein the particular wavelength is defined by an equation 2*a m *(√∈ m )*n/S, where a m is a length of a side of a structure pattern and ∈ m is a mean volume dielectric constant.