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Metamaterial antenna array for efficient wireless energy transmission in Fresnel area

A technology of wireless energy transmission and antenna array, applied in the field of antenna array based on metamaterials, can solve the problems of far lower efficiency and small antenna array area, and achieve the effect of improving efficiency and improving effect

Inactive Publication Date: 2021-03-19
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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Problems solved by technology

However, because the area of ​​the antenna array is not large (so the number of antenna elements does not exceed 4x4 or 6x6), the efficiency obtained is still far from the effect that can be achieved with a continuous aperture antenna

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  • Metamaterial antenna array for efficient wireless energy transmission in Fresnel area
  • Metamaterial antenna array for efficient wireless energy transmission in Fresnel area
  • Metamaterial antenna array for efficient wireless energy transmission in Fresnel area

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Embodiment Construction

[0024] In order to facilitate those skilled in the art to understand the technical content of the present invention, the content of the present invention will be further explained below in conjunction with the accompanying drawings.

[0025] The traditional radiating WPT system is realized by the antenna array transmitting aperture 1 composed of discrete N antenna elements and the receiving aperture 2 composed of M antenna elements 3, the distance between them (D is the aperture size of the transmitting antenna array, and λ is the wavelength).

[0026] Such as figure 1 shown. According to the literature "W.Geyi, "Foundations of applied electrodynamics". New York, NY, USA: Wiley, 2010 (pp.273-275)." and "L.Shan and W.Geyi, "Optimal design of focused antenna arrays, "IEEE Trans.Antennas Propag., vol.62, no.11, pp.5565-5571, Nov.2014." In the method, the whole system can be regarded as a network of N+M ports, and the scattering matrix can be used (Define the working frequency...

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Abstract

The invention discloses a metamaterial antenna array for efficient wireless energy transmission (WPT) in a Fresnel area, is applied to wireless power transmission, and aims to solve the problem of lowwireless power transmission efficiency of an existing small-size antenna array. The antenna array 19 comprises a plurality of closely spaced sub-wavelength size LC (ELC) cells connected to the feed network through metal vias; a genetic algorithm optimization tool of Ansys HFSS and an ELC equivalent design model (including a Floquet port and master / slave boundary conditions) are used for optimizing LC (ELC) unit cell parameters, so that the maximum absorption (or radiation) efficiency and impedance matching are achieved on the working frequency, and the antenna array serves as a transmitting antenna 1 and a receiving antenna or antenna array 2 of a WPT system. The wireless power transfer efficiency can be very close to a continuous aperture limit value.

Description

technical field [0001] The invention belongs to the field of wireless power transmission (WPT), in particular to an antenna array technology based on metamaterials. Background technique [0002] A complete wireless power transfer (WPT) system design is a complex design process that has received extensive attention from the last century to the present. We assume a WPT system based on far-field radiation mechanism, which consists of DC / AC power supply, RF power source, transmitting antenna, receiving antenna and rectification circuit. [0003] The transmitting and receiving antenna array is an important part of the radiating WPT system, which will significantly affect the efficiency of the whole WPT system. In the Fresnel region, the literature "A.F.Kay, "Near-field gain of aperture antennas," IRETrans.Antennas Propag., vol.AP-8, pp.586-593Nov.1960." and "G.V.Borgiotti, "Maximumpower transfer between two planar apertures in the Fresnel Zone,"IRETrans.Antennas Propag.,vol.AP-...

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Application Information

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IPC IPC(8): H01Q21/06H01Q21/00H01Q1/50H01Q3/30H01Q15/00G06F30/20
CPCG06F30/20H01Q1/50H01Q3/30H01Q15/0086H01Q21/0006H01Q21/065
Inventor 殷丹杨钊赵发定文光俊
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA
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