Graphene high-impedance surface for direction pattern-reconfigurable antenna

A technology of reconstructing antenna and high impedance, applied in the direction of antenna, electrical components, etc., can solve the problems of reducing antenna design cost and control complexity, and achieves regulation of current distribution, maximization of gain, reduction of design cost and subsequent complex reconfiguration. degree of effect

Inactive Publication Date: 2016-10-12
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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  • Summary
  • Abstract
  • Description
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  • Application Information

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Problems solved by technology

At the same time, the graphene high-impedance surface is suitable for a variety of antenna radiating unit forms, which reduces the overall design cost of the antenna, and also greatly simplifies the reconfigurable control system of the antenna, overcoming the shortcomings of requiring a large antenna system and complicated follow-up control in the past. Really simple adjustment without losing the main lobe gain value of the antenna

Method used

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  • Graphene high-impedance surface for direction pattern-reconfigurable antenna
  • Graphene high-impedance surface for direction pattern-reconfigurable antenna
  • Graphene high-impedance surface for direction pattern-reconfigurable antenna

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Embodiment 1

[0025] This embodiment is a theoretical verification example, including the antenna radiation unit 1 and the high-impedance surface 2 .

[0026] Figure 2-3 It is a schematic diagram of the structure of a high-impedance surface unit, including a composite dielectric substrate 3, a full metal surface 6 printed on its lower surface, a square metal patch 4 printed in the middle of its upper surface, and graphene connection stickers on the left and right sides of the patch sheet 5, the composite dielectric substrate 3 is composed of an aluminum oxide layer 31, a polysilicon layer 32 and a glass layer 33 stacked sequentially from top to bottom, and a DC bias voltage V is added between the graphene 5 and the polysilicon 32 c 7. It is used to adjust the surface conductivity of the graphene; the aluminum oxide layer 31 in the composite dielectric substrate is used to isolate the polysilicon layer 32 and the graphene 5 to form a bias voltage.

[0027] refer to image 3 , the period o...

Embodiment 2

[0038] Embodiment 2 is an actual reference example, adopting a different form of antenna radiation unit from Embodiment 1, such as Figure 5 As shown in (a), the bottom of the antenna radiation unit is supported by polytetrafluoroethylene 8. At the same time, the polytetrafluoroethylene under the radiator is removed to make it an air cavity. Since the dielectric constant of polytetrafluoroethylene is 2.2, and Below the antenna is an air cavity substrate, which can effectively reduce the back radiation of the antenna. Since the working center frequency f=1.03 THz of the antenna radiation unit selected in this embodiment is the same as that in Embodiment 1, the high-impedance surface unit used is the same.

[0039] refer to Figure 5 , the high-impedance surface 2 in this embodiment is composed of 10×10 high-impedance surface units, and the antenna radiation unit adopts the form of a butterfly antenna, in which the light gray patch is located on the lower surface of the dielect...

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Abstract

The invention discloses a graphene high-impedance surface for a direction pattern-reconfigurable antenna, and belongs to the technical field of antennas. The high-impedance surface is formed by periodically arranging a plurality of high-impedance surface units, wherein each high-impedance surface unit comprises a composite dielectric substrate, a square metal patch arranged on the upper surface of the composite dielectric substrate, graphene patches arranged on the left side and the right side of the composite dielectric substrate and an all-metal surface arranged on the lower surface of the composite dielectric substrate; and the graphene patches are rectangular patches of connecting the metal patches of two units. Continuous reconfiguration of direction patterns can be achieved within a relatively large angle range (+/-80 degrees); constraints of discrete reconfiguration of the direction patterns of using a switch element, an array antenna and the like in the past are overcome; meanwhile, the high-impedance surface is suitable for multiple antenna radiation unit forms; the overall design cost of the antenna is reduced; meanwhile, the antenna reconfiguration control system is also greatly simplified; the defects that a large antenna system is needed in the past and subsequent control is complicated are overcome; simple adjustment is really achieved; and the main lobe gain value of the antenna is not lost.

Description

technical field [0001] The invention belongs to the technical field of antennas, and in particular relates to a reconfigurable antenna with a pattern realized by a graphene-loaded high-impedance surface, which can be used for signal transmission and reception of a radio frequency terminal of a terahertz frequency band communication system. Background technique [0002] Antenna is a key device for signal transmission and reception in wireless communication systems. In recent years, in order to effectively and rationally use space and spectrum resources, wireless communication systems have begun to develop in the direction of large capacity, multi-function, and ultra-wideband, and these requirements will inevitably increase the number of antennas on the antenna platform and increase the complexity of the system. Coupling interference will also occur between them, which will affect system performance. In order to reduce system complexity and cost while achieving good electroma...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01Q15/00
CPCH01Q15/002
Inventor 梁锋李浩赵德双王秉中
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA
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