Fractal structure body, fractal structure assembly and production methods and applications for them

A technology of fractal structure and manufacturing method, which is applied to antennas, slender active unit end feeds, electrical components, etc., and can solve problems such as difficulty in making fractal structures and no 3-dimensionality.

Inactive Publication Date: 2006-10-18
OSAKA UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

On the other hand, since it is difficult to make complex fractal structures, there are only a few studies on 2-dimensional fractal structures in experimental research [see Non-Patent Document 3], and there is no 3-dimensional fractal structure at all. research status

Method used

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  • Fractal structure body, fractal structure assembly and production methods and applications for them
  • Fractal structure body, fractal structure assembly and production methods and applications for them
  • Fractal structure body, fractal structure assembly and production methods and applications for them

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Embodiment approach 1

[0100] The fractal structure according to one embodiment of the present invention has a partially or completely three-dimensional fractal structure, and electromagnetic waves of a specific wavelength can locally exist in the fractal structure.

[0101] Specifically, the three-dimensional fractal structure of Embodiment 1, whose shape is a regular hexahedron with one side a (called a 0-degree hexahedron), is made as follows:

[0102] (1) Divide the zero-order hexahedron into primary hexahedrons reduced to 1 / S, and form primary cavities penetrating from one side to the other between the two opposing faces of the zero-order hexahedron, A predetermined number of primary hexahedrons are extracted to form a primary cavity perpendicular to the center of the body center of the zero-degree hexahedron in three directions.

[0103]Here, the 1st-order hexahedron reduced to 1 / S from a 0th-order hexahedron means a hexahedron whose shape is similar to a 0th-order hexahedron and whose side is...

Embodiment approach 2

[0164] Embodiment 2 of the present invention relates to a fractal structure and its aggregates.

[0165] That is, in Embodiment 1, it was explained that the attenuation function of the reflectivity and transmittance of electromagnetic waves or light should be found practically in any region regarding the fractal structure that is the basis of the present invention. However, it has been confirmed from experiments conducted by the inventors that the function of attenuating the reflectance and transmittance of electromagnetic waves or light of a specific wavelength cannot be found simply by joining a plurality of fractal structures according to Embodiment 1. Therefore, in the second embodiment, the attenuation function of the reflectance and transmittance of electromagnetic waves or light of a specific wavelength locally present in a certain area is provided in a wider area, and it can be applied to attenuate only the reflectance. Widely used fractal structures and their aggregat...

Embodiment approach 3

[0215] The three-dimensional fractal structure formed by the above method can be used as a complete absorber that can intercept and absorb electromagnetic waves of specific wavelengths inside without reflection and transmission, and can be used for various purposes. .

[0216] Hereinafter, as Embodiment 3, applications using the fractal structures of Embodiments 1 to 2 will be described.

[0217] When the fractal structure of the present invention is used, it can be used as a filter that can completely block electromagnetic waves of a specific wavelength.

[0218] For example, when using a fractal structure with one side a made of a dielectric, it can be used as the equivalent of the following formula:

[0219] [number 15]

[0220] 2 a · ε · n / S

[0221] The electromagnetic wave of a specific wavelength exists locally in the fractal structure, and the filter that can co...

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Abstract

In order to provide a three-dimensional fractal structure that has not been realized by prior art or new technology, the fractal structure of the present invention is a structure with a three-dimensional fractal structure partially or entirely, and in terms of the penetration rate of electromagnetic waves, the The fractal structure has a minimum value in the unique wavelength determined by the structure factor and material of the fractal structure, and / or has a minimum value in the specific wavelength determined by the structure factor and material of the fractal structure in terms of reflectivity of electromagnetic waves.

Description

technical field [0001] The present invention relates to a fractal structure with the functions of controlling electromagnetic waves from the optical field to the microwave field, especially the localization, interception, non-reflection, absorption, accumulation, amplification, and filtering of electromagnetic waves of a specific frequency, and its manufacturing method and uses. Background technique [0002] The fractal structure has the so-called self-similarity characteristic of showing a similar type of structure to the whole regardless of any part of the structure. The research on the theory of reflection and transmission of electromagnetic waves based on fractal structures has gradually become popular since the 1990s. It has also been found that the reflection coefficient becomes larger in a specific direction, or that the thickness and frequency of the fractal structure vary greatly periodically [see Non-Patent Documents 1 and 2]. However, these theoretical calculatio...

Claims

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Application Information

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IPC IPC(8): H05K9/00H01Q9/36H01Q17/00
Inventor 宫本钦生桐原聪秀森丰贵武田三男本田胜也迫田和彰
Owner OSAKA UNIV
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