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Graphene ultra wideband planar monopole antenna

A monopole antenna, graphene technology, applied in the direction of antenna, antenna parts, antenna grounding device, etc., can solve problems such as graphene antenna research, and achieve the effect of high gain

Inactive Publication Date: 2017-12-01
SHANGHAI JIAO TONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The notch can make these frequency bands have impedance to suppress interference and the performance of other frequency bands will not be affected. However, the current notch has not been studied for graphene antennas

Method used

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Examples

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Effect test

Embodiment 1

[0034] Such as figure 1 As shown, the graphene ultra-wideband planar monopole antenna (antenna one) provided by the present embodiment, antenna one can be used in wireless communication systems such as the terahertz frequency band, and the size of the planar monopole antenna is determined by the minimum operating frequency. The minimum operating frequency of the antennas involved in the article is 0.15THz. If the operating frequency changes, the size of the antenna should also be changed accordingly. According to the relationship between graphene conductivity and frequency, this antenna can work in the low terahertz frequency band. In this invention, the bias voltage of graphene is 0.5eV.

[0035] Antenna 1 mainly includes a graphene radiator 1 , a coplanar waveguide 2 and a dielectric substrate 3 , and the graphene radiator 1 and the coplanar waveguide 2 are jointly arranged on the dielectric substrate 3 . The dielectric substrate 3 is fused quartz with a volume of 3000 μm*...

Embodiment 2

[0038] Such as image 3 As shown, the graphene ultra-wideband planar monopole antenna (antenna two) provided in this embodiment is based on the first embodiment, and based on the principle of resonance filtering, slots are made on the signal line 201 to achieve the purpose of trapping, and the trapped The wave frequency band is 0.122 THz, and the total length of the slot 204 is about half of the wavelength of the trapped frequency band. When the notched frequency band changes, the length of the slot 204 will also change. In this embodiment, the total length of the groove 204 is 880 μm, and the width is 5 μm.

Embodiment 3

[0040] Such as Figure 4 As shown, the graphene ultra-wideband planar monopole antenna (antenna three) provided by the present embodiment is based on the first embodiment or the second embodiment, and the working wavelength of the antenna is approximately around the graphene radiator 1 and the coplanar waveguide 2 A metal strip 4 is placed on half of the place, the metal strip 4 is made of gold, the width is about half of the working wavelength of the antenna, and the thickness is 1 μm. The function of the metal strip 4 is to block a large amount of energy on the dielectric substrate 3 in the metal strip 4, and the metal strip 4 also functions as an array, thereby improving the directivity and gain performance of the antenna. In this embodiment, the width of the metal strip 4 is 386 μm.

[0041] Figure 5 is the gain pattern of antenna 1 at a frequency of 0.15THz, Figure 6 is the gain pattern of antenna 1 at a frequency of 0.2THz, from Figure 5 and Figure 6 It can be s...

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Abstract

The invention provides a graphene ultra wideband planar monopole antenna. The antenna includes a graphene radiator, a coplanar waveguide and a dielectric substrate. The graphene radiator and the coplanar waveguide are disposed on the dielectric substrate. The coplanar waveguide includes a signal wire and a ground wire. A lumped port is disposed between the signal wire and the ground wire. The antenna has a frequency band, which is can be covered, at a terahertz frequency band, the advantages of an ultra wideband, wave trapping, a higher gain and the like and certain guiding significance for wave trapping methods of the graphene antenna and methods of improving the antenna performance.

Description

technical field [0001] The invention relates to the technical field of antennas, in particular to a graphene ultra-wideband planar monopole antenna. Background technique [0002] Graphene is a two-dimensional crystal composed of carbon atoms with only one atomic thickness. As a new type of dispersion material, it has become a research hotspot in recent years due to its excellent properties in electromagnetism, heat and mechanics. Due to its low loss and adjustable surface conductivity with the applied electric and magnetic fields, graphene has broad application prospects in terahertz technology. [0003] There have been researches on graphene ultra-wideband planar monopole antenna abroad, and an article about graphene ultra-wideband planar monopole antenna published on 1st IET Colloquium on Antennas, Wireless and Electromagnetics was found by searching the existing technology: Graphene THz Ultra Wideband CPW-fed Monopole Antenna. This paper introduces an ultra-wideband pla...

Claims

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Application Information

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IPC IPC(8): H01Q1/36H01Q1/38H01Q1/48H01Q1/50
CPCH01Q1/368H01Q1/38H01Q1/48H01Q1/50
Inventor 徐贝贝张跃平
Owner SHANGHAI JIAO TONG UNIV
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