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Method for realizing near field sub-wavelength focusing through artificial peculiar medium plane

A special medium and sub-wavelength technology, applied in optical components, optics, instruments, etc., can solve the problems of reduction, inconvenient production efficiency, and low energy transmission efficiency of wireless energy transmission, and achieve simple production, increased mutual inductance, and improved wireless energy. The effect of transmission efficiency

Inactive Publication Date: 2015-03-18
ZHEJIANG UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At the same time, with the acceleration of the pace of modern life and the increasing use of new technologies, people need to use more and more production tools and entertainment digital products in their daily work, such as personal computers, notebook computers, smart phones, Tablet PCs, digital cameras, etc., all need a power cord to connect, and a large number of power cords bring great inconvenience and reduce production efficiency to their portability, office use and other activities
At this stage, although wireless transmission can solve this problem, such as common electromagnetic induction coils, we all know that the energy transmission efficiency of wireless energy transmission achieved by using electromagnetic induction between coils is not high.

Method used

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  • Method for realizing near field sub-wavelength focusing through artificial peculiar medium plane
  • Method for realizing near field sub-wavelength focusing through artificial peculiar medium plane
  • Method for realizing near field sub-wavelength focusing through artificial peculiar medium plane

Examples

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Effect test

Embodiment 1

[0080] Near-field subwavelength focusing effect

[0081] According to the above design method, a piece of work frequency at 3GHz was designed and manufactured to achieve sub-wavelength focusing of an ideal current loop at the position of one-tenth of the wavelength in the near field (such as figure 2 Shown) artificial specific medium plane, and related experimental verification. The experimental results are as follows:

[0082] When the actual incident field distribution of the current loop has a larger beam spot size than the ideal situation, the designed artificial special medium plane still achieves the sub-wavelength focusing effect at the focal plane (as shown in Figure 7(b) and 7(d) ) shown). Although there are some errors compared with the design results, this is caused by the defects in the actual production process of the current loop. This defect is because in actual production, the feed pin of the current loop will inevitably destroy the integrity of the loop, t...

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PUM

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Abstract

The invention discloses a method for realizing near field sub-wavelength focusing through an artificial peculiar medium plane. The method comprises the following steps that (1) according to known needed electromagnetic wave field distribution, specific transmission electromagnetic wave field distribution is reversely designed; (2) according to field distribution entering the artificial peculiar medium plane and the transmission electromagnetic wave field distribution needed to be achieved, an electrode thin impedance face structure is used as a basic unit of the artificial peculiar medium plane, the field distribution entering the artificial peculiar medium plane is modulated to the transmission electromagnetic wave field distribution needed to be realized, and then according to boundary conditions on the artificial peculiar medium plane, needed impedance values at any position of the artificial peculiar medium plane are solved; (3) according to the solved impedance value distribution on the artificial peculiar medium plane, a corresponding specific realizing structure is designed. By means of the method, mutual inductance between mutual inductors is enlarged, and therefore wireless energy transmission efficiency can be improved.

Description

technical field [0001] The invention belongs to the field of super-resolution technology and wireless energy transmission, and in particular relates to a method for realizing near-field sub-wavelength focusing through an artificial special medium plane. Background technique [0002] From ordinary to daily life, people wear glasses on the bridge of their noses to help people properly adjust the incident light field into the human eye and image it on the retina. With the development of technology, it has entered the biological science research at the molecular scale, etc. It is inseparable from a kind of regulation of the light field - imaging. For the traditional optical lens imaging system, there is a limit to its imaging resolution - the diffraction limit (about 1 / 2 of the wavelength of the imaging beam). This also makes them more and more unable to meet the needs of modern social science and technology development, especially the increasingly rapid development of micro-na...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02B27/58
Inventor 马云贵兰璐姜伟
Owner ZHEJIANG UNIV
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