Wireless energy collecting device based on super-surface structure

Abstract

The invention discloses a wireless energy collecting device based on a super-surface structure. The wireless energy collecting device comprises a super-surface array structure and a rectifying circuit, the super-surface array structure is composed of a plurality of super-surface structure units, the super-surface structure unit comprises a metal layer, a first dielectric substrate, an air layer, afirst ground layer and a power synthesis network layer, which are sequentially arranged from top to bottom, and the power synthesis network layer comprises a second ground layer, a second dielectricsubstrate and a first signal layer, which are sequentially arranged from top to bottom; the rectifying circuit is arranged in the air layer, an electromagnetic structure layer is connected with the first signal layer through a metallized through hole formed in the metal layer, and an output port of the power synthesis network layer is connected with an input port of the rectifying circuit. The device simplifies the structure of the existing energy collecting device, reduces the manufacturing cost of the energy collecting device, and effectively improves the efficiency of the energy collectingdevice at the same time.

Description

technical field [0001] The invention belongs to the technical field of physics, and in particular relates to a wireless energy collection device based on a metasurface structure. Background technique [0002] An electromagnetic metamaterial is a synthetic structure that is not found in natural materials. Electromagnetic metasurfaces have the characteristics of small size, working at subwavelength, and low profile. [0003] Sun Yat-sen University applied for a patent "a microstrip rectenna based on WIFI frequency band" (application number: 201510115925.5). The technical solution disclosed in this patent is to use a conventional microstrip antenna as an energy harvesting device. The antenna has a large structural size and does not use System integration and miniaturization. [0004] The patent "Metamaterial Electromagnetic Energy Harvesting Device Based on Quadruple Rotational Symmetry Structure" (application number: 201610093112.5) applied by Shanghai University, the techni...

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Problems solved by technology

[0003] Sun Yat-sen University applied for a patent "a microstrip rectenna based on WIFI frequency band" (application number: 201510115925.5). The technical solution disclosed in this patent is to use a conventional microstrip antenna as an energy harvesting device. The antenna has a large structural size and does not use System integration and miniaturization

[0004] The patent "Metamaterial Electromagnetic Energy Harvesting Device Based on Quadruple Rotational Symmetry Structure" (application number: 201610093112.5) applied by Shanghai University, the technical solution disclosed in this patent uses multiple load resistors to collect wireless energy, and the number of load resistors is relatively small. Therefore, the number of rectification circuits required is large, which increases the design complexity of the system and brings in a large loss, which is not conducive to practical application

[0005] The patent "Environmental RF micro-energy collection device based on electromagnetic metasurface" (application number: 201610470948.2) applied by Xidian University, the metasurface electromagnetic structure designed by this patent uses a single dielectric layer, but the patent uses a thicker dielectric layer , considering the production cost, the production cost of this structure is relatively high; and each metasurface structure is collected by a load resistor, and the actual rectification circuit also needs to be considered, so the structure of the rectification circuit will be more complicated, so the structure will also be relatively The complexity, less use of practical applications

[0006] Based on the above analysis, the main problems faced by space wireless energy harvesting are as follows: 1) The size of conventional rectennas is large, which cannot meet the needs of miniaturization of wireless energy harvesting devices; High, less utilized for practical applications

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