Omnidirectional matching non-uniform energy receiving surface for line source radiation

Abstract

The invention discloses an omnidirectional matching non-uniform energy receiving surface for line source radiation. The omnidirectional matching non-uniform energy receiving surface is formed by arranging a plurality of square sub-wavelength resonance units; four sides of a first metal copper sheet are provided with four identical strip-shaped gaps from the midpoints of the corresponding sides in the radial direction respectively; the first metal copper sheet is provided with a via hole; the via hole is formed in a radial straight line between one strip-shaped gap of the first metal copper sheet and the center of the first metal copper sheet, penetrates through a first dielectric layer and is electrically connected with the first metal copper sheet; a through hole is coaxially formed in a second metal copper sheet at the via hole; the radius of the through hole is larger than that of the via hole; and the via hole is electrically connected with the second metal copper sheet. The omnidirectional matching non-uniform energy receiving surface is simple in structure, small in size and light in weight, can be designed into different shapes and sizes, is regarded as a uniform medium, has an excellent energy receiving effect on incident waves at various angles, does not need to damage raw materials during use, and can be widely applied to military and civil fields such as wireless energy transmission, antennas, communication systems, electromagnetic shielding and the like.

Description

technical field [0001] The invention relates to a non-uniform artificial electromagnetic surface, which belongs to the field of wireless microwave energy reception, and specifically relates to a non-uniform sub-wavelength resonance unit regularly arranged to realize omnidirectional matching energy reception for radiation at various angles of a line source at a specific distance non-uniform surface. Background technique [0002] Microwave wireless power transmission (MWPT) has always been a hot topic in electrical and microwave studies because of its wide application prospects in wireless charging and space solar satellite systems. In MWPT systems, a key factor is reception efficiency, which is directly determined by the reception antenna used to receive wireless energy. Conventional receive antennas or antenna arrays have some inherent limitations, such as unavoidable backscatter, suboptimal aperture efficiency, and unavoidable impedance mismatch, which will cause reflectio...

AI Technical Summary

Problems solved by technology

However, the above-mentioned uniform energy-receiving metasurface is usually only suitable for specific plane wave incidence such as normal incidence.

As the incident angle of microwave energy increases, the impedance mismatch deteriorates rapidly, and the receiving efficiency of the corresponding receiving metasurface will also decrease rapidly

As a result, their performance as receivers is generally not ideal when the radiant energy is incident as a non-plane wave, such as from a line source

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