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High-focusing metasurface lens

A metasurface and lens technology, applied in the field of metasurface, can solve the problems of high machining accuracy, high machining difficulty, and large longitudinal size, and achieves the effect of solving high machining accuracy requirements, compact structure, and large longitudinal size.

Pending Publication Date: 2022-06-21
XI AN JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in order to achieve arbitrary phase and amplitude, the metasurface will have a multi-layer structure with a large longitudinal dimension; or a non-periodic structure and loaded with active devices, which requires high processing accuracy and is difficult to process

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0032] The high-focusing meta-surface lens in this embodiment is an ultra-thin focusing meta-surface lens operating at 10 GHz. The dielectric substrate adopts F4BM, the dielectric constant of F4BM is 4.3, the loss tangent is 0.0025, and the thickness is 2.8mm. The same cross-shaped metal lines are printed on both sides of the dielectric substrate, and the entire unit is a single-layer structure.

[0033] The lens unit includes two types of units: lens unit EA1 and lens unit EB2. The side lengths of the lens unit EA1 and the lens unit EB2 are both p. The same metal pattern of the lens unit EA1 is printed on the front and back sides of the dielectric substrate, and the structure of the lens unit EA1 includes a hollow cross ring 1-1 and a first solid cross 1-2. The width of the hollow cross ring 1-1 is t, the length of the ring arm is r, and the arm width is w; the arm length of the solid cross 1-2 inside the hollow cross ring 1-1 is r 1 , the arm width is w 1 . The same met...

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Abstract

The invention discloses a high-focusing metasurface lens, which comprises a dielectric substrate and a plurality of lens units, the dielectric substrate is square, the lens units are arranged on the front and back surfaces of the dielectric substrate, and the lens units are arranged in a square matrix form; for the front surface of the dielectric substrate, lens units EB are arranged at four corners of the dielectric substrate; the rest of the lens units EB are arranged in the middle of the dielectric substrate, and the lens units EB are positioned on lattice points on the sides of a lattice point polygon and lattice points in the lattice point polygon; the lens unit EA surrounds the lens unit EB in the middle; the arrangement form of the lens units on the reverse side of the dielectric substrate is the same as the arrangement form of the lens units on the front side of the dielectric substrate, the lens units EA on the reverse side of the dielectric substrate directly face the lens units EA on the front side of the dielectric substrate one by one, and the lens units EB on the reverse side of the dielectric substrate directly face the lens units EB on the front side of the dielectric substrate one by one. The structure is simple, machining is easy, and the thickness is small.

Description

technical field [0001] The invention belongs to the field of metasurfaces, and in particular relates to a high-focus metasurface lens. Background technique [0002] Antenna, as a device for transmitting and receiving electromagnetic waves, is the core device in wireless communication and radar systems. In order to meet the high gain and low side lobe requirements of the communication system for the antenna, generally by adjusting the phase distribution of the surface field of the transmitting antenna port, the focused and directional radiation of the radiated wave is realized, thereby reducing the spatial diffusion loss of the radiated wave and further improving the energy of the radiated wave. . This can be achieved by loading a lens in the direction of the antenna radiation. The lens can convert spherical waves into plane waves, realizing the design of high gain and high directivity of the antenna; the lens can also converge the incident plane waves to a point to realize...

Claims

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Application Information

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IPC IPC(8): H01Q15/02H01Q15/00
CPCH01Q15/02H01Q15/0086
Inventor 陈娟李一诺张安学李建星施宏宇
Owner XI AN JIAOTONG UNIV
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