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A method and device for focusing electromagnetic energy in a non-line-of-sight environment

A technology of electromagnetic energy and focusing method, applied in electrical components, antennas and other directions, can solve problems such as non-line-of-sight environments that cannot be applied, and achieve the effect of high electromagnetic energy focusing efficiency and high transmission efficiency

Active Publication Date: 2021-04-20
NORTH CHINA UNIV OF WATER RESOURCES & ELECTRIC POWER
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Aiming at the problem that the above-mentioned prior art cannot be applied to the non-line-of-sight environment, the purpose of the present invention is to provide a method and device for focusing electromagnetic energy in a non-line-of-sight environment to solve the problems existing in the prior art

Method used

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  • A method and device for focusing electromagnetic energy in a non-line-of-sight environment
  • A method and device for focusing electromagnetic energy in a non-line-of-sight environment
  • A method and device for focusing electromagnetic energy in a non-line-of-sight environment

Examples

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Effect test

Embodiment 1

[0040] Such as Figure 1~3As shown, Embodiment 1 requires two electromagnetic metasurface modules to realize the electromagnetic energy focusing function.

[0041] Including the following steps:

[0042] ST1: The electromagnetic metasurface module B3 and the electromagnetic metasurface module A4 are deployed in an environment where there is a non-line-of-sight, that is, an obstacle 7. The electromagnetic metasurface module B3 is arranged near the electromagnetic transmitter 2, and the electromagnetic metasurface module A4 is arranged in k required Near the focused focus 6, the electromagnetic metasurface module B3 and the electromagnetic metasurface module A4 are equipped with a plurality of super patch units, and the multiple super patch units on the corresponding electromagnetic metasurface module are interconnected with a corresponding IOT gateway 5 .

[0043] ST2: Each IOT gateway is interconnected with the electromagnetic function controller 1, and the electromagnetic fu...

Embodiment 2

[0080] Embodiment 2 requires an electromagnetic metasurface module A4 to realize the electromagnetic energy focusing function. The focusing device is: an electromagnetic metasurface module A4 is installed near the focal point 6 to be focused, and the rest are the same as in Embodiment 1.

[0081]The focusing process is as follows: the electromagnetic transmitter 2 emits electromagnetic waves towards the electromagnetic metasurface module A4 to directly form the reference wave of the electromagnetic metasurface module A4, and the electromagnetic metasurface module A4 has the electromagnetic wave holographic function. The rest are all the same as in Example 1.

Embodiment 3

[0083] Embodiment three needs three electromagnetic metasurface modules to realize the electromagnetic energy focusing function, and its focusing device is: the electromagnetic metasurface module B3 is set near the electromagnetic transmitter 2, and the electromagnetic metasurface module A4 is set near the focal point 6 that needs to be focused. An electromagnetic metasurface module Bn is arranged between the electromagnetic metasurface module B3 and the electromagnetic metasurface module A4, and the rest are the same as in the first embodiment.

[0084] The focusing process is as follows: the electromagnetic transmitter 2 emits electromagnetic waves towards the electromagnetic metasurface module B3, the electromagnetic metasurface module B3 reflects the electromagnetic waves to the adjacent electromagnetic metasurface module Bn, and the electromagnetic metasurface module Bn reflects the electromagnetic waves to the electromagnetic metasurface module On A4, the reference wave o...

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Abstract

The invention discloses a method and device for focusing electromagnetic energy in a non-line-of-sight environment. The invention regards multiple target focuses as virtual point sources, backpropagates to the aperture of the antenna, and places elements only in the backpropagation The point at which the phase difference between the aperture field and the guided mode reference falls below a certain threshold. The first step in the process is to identify a virtual point source where the beam needs to be focused. The present invention proposes a Fresnel zone multi-point focusing method in a software-defined wireless environment. The method also has high propagation efficiency in a non-line-of-sight environment, so as to solve the problems existing in the prior art.

Description

technical field [0001] The invention belongs to the field of electromagnetic energy focusing, and in particular relates to an electromagnetic energy focusing method and device in a non-line-of-sight environment. Background technique [0002] Electromagnetic energy focusing technology refers to focusing the antenna radiation field on multiple specific points in the near-field area, thereby increasing the electromagnetic energy in the focused area and improving energy transmission efficiency. This technology has great potential in several emerging applications such as near-field imaging, medical treatment, non-destructive testing, and wireless energy transfer. [0003] The reason why the near field can focus energy is that electromagnetic energy focusing technology can obtain resolution beyond the diffraction limit. Therefore, with proper phase distribution on the antenna aperture, good focusing characteristics can be obtained in the near-field region. [0004] Over the past...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01Q15/00
CPCH01Q15/0086
Inventor 罗文宇王行业许丽刘河潮邵霞陆桂明刘雨陈俊锋
Owner NORTH CHINA UNIV OF WATER RESOURCES & ELECTRIC POWER