WO2019029127A1

WO2019029127A1 - Graphene-based coupler with adjustable power distribution ratio

Info

Publication number: WO2019029127A1
Application number: PCT/CN2018/072380
Authority: WO
Inventors: 曲美君; 邓力; 李书芳; 张贯京; 葛新科; 张红治
Original assignee: 深圳市景程信息科技有限公司
Priority date: 2017-08-09
Filing date: 2018-01-12
Publication date: 2019-02-14
Also published as: CN207038682U

Abstract

The present utility model provides a graphene-based coupler with an adjustable power distribution ratio, comprising a dielectric slab, a resonant ring, and a metal patch; the resonant ring comprises a U-shaped upper portion and a U-shaped bottom with openings arranged oppositely; the U-shaped upper portion and the U-shaped bottom are connected by means of a first rectangular portion and a second rectangular portion; first graphene patches are respectively attached to the inner walls of the U-shaped upper portion and the U-shaped bottom; second graphene patches are respectively attached to the inner walls of the first and second rectangular portions; a first metal strip is respectively connected to either side of the open end of each of the U-shaped upper portion and the U-shaped bottom; a pair of second metal strips are symmetrically arranged on the upper and lower sides of each of the first metal strips; the outer ends of each pair of second metal strips are both connected to a rectangular metal sheet to form four ports; the vertical central axis of the U-shaped upper portion superposes that of the U-shaped bottom; the first and second rectangular portions are symmetric about the central axis. The present utility model can implement dynamic adjustment of the power distribution ratio of a coupler.

Description

Graphene-based adjustable power distribution ratio coupler

Technical field

The utility model relates to the technical field of terahertz communication, in particular to a graphene-based adjustable power distribution ratio coupler.

Background technique

Couplers are one of the most widely used components in microwave and radar feeder technology. The coupler realizes the transmission of signal power between the communication systems, realizing the proportional distribution of power and the like. The prior art couplers are mostly made of metal. After the structure and size of the coupler are fixed, the operating frequency and power distribution ratio (referred to as the power ratio) are also determined, and cannot be dynamically adjusted. When the power distribution ratio of the coupler needs to be adjusted, only the coupler can be replaced, which is costly and complicated to operate.

technical problem

The purpose of the utility model is to provide a graphene-based adjustable power distribution ratio coupler, which aims to solve the technical problem that the power distribution ratio dynamic adjustment of the coupler cannot be realized in the prior art.

Technical solution

To achieve the above object, the present invention provides a graphene-based adjustable power distribution ratio coupler, comprising a dielectric plate, a resonant ring disposed on a surface of the dielectric plate, a first port, a second port, and a third a port and a fourth port, and a metal patch disposed on a lower surface of the dielectric board, wherein:

The resonant ring includes a U-shaped upper portion and a U-shaped bottom opposite to each other, the U-shaped upper portion and the U-shaped bottom portion being connected by a first rectangular portion and a second rectangular portion; the U-shaped upper portion and the U-shaped bottom portion are on the inner wall a first graphene patch is disposed on each of the first graphene patches, and a second graphene patch is disposed on each of the inner walls of the first rectangular portion and the second rectangular portion;

a first metal strip is connected to each of the two sides of the U-shaped upper portion and the U-shaped bottom portion, and a pair of second metal strips are symmetrically disposed on the upper and lower sides of each of the first metal strips. The outer ends of the metal strips are each connected with a rectangular metal piece to form a first port, a second port, a third port and a fourth port, respectively;

The metal patch covers a lower surface of the dielectric plate.

Preferably, the metal patch has the same size as the dielectric plate; the U-shaped upper portion and the U-shaped bottom have the same size; and the first rectangular portion and the second rectangular portion have the same size.

Preferably, the thickness of the U-shaped upper portion and the U-shaped bottom is the same as the thickness of the first graphene patch; the thickness of the first rectangular portion and the second rectangular portion is different from the thickness of the second graphene patch The thickness is the same.

Preferably, the U-shaped upper portion and the U-shaped bottom have a width of 0.5 μm, the U-shaped upper portion and the U-shaped bottom portion have a length of 4.55 μm, and the U-shaped upper portion and the U-shaped bottom portion have a height of 10 μm. The U-shaped upper portion and the U-shaped bottom have an opening width of 3.55 μm; the first rectangular portion and the second rectangular portion have a length of 3.15 μm, and the first rectangular portion and the second rectangular portion have a height of 17 μm, The horizontal distance between the first rectangular portion and the second rectangular portion is 1.35 μm; the length of the first metal strip is 23 μm, the height of the first metal strip is 0.7 μm; and the length of the second metal strip is 23 Micrometer, the height of the second metal strip is 0.2 micrometer; the vertical distance between the first metal strip and a pair of second metal strips symmetrically disposed on the upper and lower sides thereof is 0.2 micrometer; the first metal strip is upper and lower The horizontal distance of the pair of second metal strips disposed laterally symmetrically is 1.75 micrometers; the length of the rectangular metal sheet is 10 micrometers, and the height of the rectangular metal strip is 1.9 micrometers.

Preferably, the first graphene patch has a width of 0.5 micrometers, and the second graphene patch has a width of 0.55 micrometers.

Preferably, the chemical potential of the first graphene patch and the chemical potential of the second graphene patch are adjusted from 0 eV to 0.3 eV.

Preferably, the dielectric plate is a silicon dioxide substrate having a thickness of 1 micrometer and a dielectric constant of 3.8.

Preferably, the coupler operates at a frequency of 1.47-2.3 THz when the coefficient of reflection is greater than -10 dB.

Beneficial effect

Compared with the prior art, the graphene-based adjustable power distribution ratio coupler of the present invention adjusts the first by bonding the first graphene patch and the second graphene patch on the inner wall of the resonant ring. The chemical potential loaded on the graphene patch and the second graphene patch can be dynamically adjusted by using the excellent electro-optic effect of the graphene.

DRAWINGS

1 is a schematic structural view of a preferred embodiment of a graphene-based adjustable power distribution ratio coupler of the present invention.

2 is a schematic structural view of a surface of a dielectric plate of a preferred embodiment of the graphene-based adjustable power distribution ratio coupler of the present invention.

3 is a schematic diagram of the S-parameter results of the reflection coefficient of the graphene-based adjustable power distribution ratio coupler when simulated by the electromagnetic simulation software.

4 is a schematic diagram showing the isolation results between the first port and the fourth port when the graphene-based adjustable power distribution ratio coupler is simulated by the electromagnetic simulation software.

FIG. 5 is a schematic diagram showing the phase difference result between the second port and the third port when the graphene-based adjustable power distribution ratio coupler is simulated by the electromagnetic simulation software.

6 is a schematic diagram showing the power distribution ratio results of the second port and the third port when the graphene-based adjustable power distribution ratio coupler is simulated by the electromagnetic simulation software.

BEST MODE FOR CARRYING OUT THE INVENTION

The present invention will be further described in detail below with reference to the specific embodiments. The following embodiments are illustrative of the present invention, and the present invention is not limited to the following embodiments.

Referring to FIG. 1 and FIG. 2, FIG. 1 is a schematic structural view of a preferred embodiment of a graphene-based adjustable power distribution ratio coupler according to the present invention. 2 is a schematic structural view of a surface of a dielectric plate of a preferred embodiment of the graphene-based adjustable power distribution ratio coupler of the present invention.

In this embodiment, the graphene-based adjustable power distribution ratio coupler 1 includes a dielectric plate 10, a resonant ring 11 disposed on an upper surface of the dielectric plate 10, a first port 12, a second port 13, and a first The three ports 14 and the fourth port 15 and the metal patch 16 disposed on the lower surface of the dielectric board 10. The material of the resonant ring 11, the first port 12, the second port 13, the third port 14, and the fourth port 15 may be metal. As a preferred embodiment of the present invention, the size of the metal patch 16 is the same as the size of the dielectric sheet 10.

The resonant ring 11 includes a U-shaped upper portion 111 and a U-shaped bottom portion 112 that are oppositely disposed, and the U-shaped upper portion 111 and the U-shaped bottom portion 112 are connected by a first rectangular portion 113 and a second rectangular portion 114. The U-shaped upper portion 111 and the U-shaped bottom portion 112 have the same size; the first rectangular portion 113 and the second rectangular portion 114 have the same size. Such dimensions include, but are not limited to, length, height, width. As a preferred embodiment of the present invention, the U-shaped upper portion 111, the U-shaped bottom portion 112, the first rectangular portion 113, and the second rectangular portion 114 may be of a unitary structure. The U-shaped upper portion 111 and the vertical center axis of the U-shaped bottom portion 112 coincide, and the first rectangular portion 113 and the second rectangular portion 114 are symmetrical about the central axis. The first graphene patch 115 is disposed on the inner wall of the U-shaped upper portion 111 and the U-shaped bottom portion 112, and the second graphene is disposed on the inner wall of the first rectangular portion 113 and the second rectangular portion 114. Patch 116. The thickness of the U-shaped upper portion 111 and the U-shaped bottom portion 112 is the same as the thickness of the first graphene patch 115; the thickness of the first rectangular portion 113 and the second rectangular portion 114 and the second graphene sticker Sheet 116 has the same thickness. The length of the first graphene patch 115 is the same as the length of the U-shaped inner wall of the first rectangular portion 113 and the second rectangular portion 114, and the length of the second graphene patch 116 is different from the first rectangle. The height of the portion 113 and the second rectangular portion 114 are the same.

A first metal strip 117 is connected to each of the two sides of the open end of the U-shaped upper portion 111 and the U-shaped bottom portion 112. A pair of second metal strips 118 are symmetrically disposed on the upper and lower sides of each of the first metal strips 117. A rectangular metal piece 119 is connected to the outer end of the second metal strip 118 to form a first port 12, a second port 13, a third port 14, and a fourth port 15, respectively. The first port 12 is an input end, the second port 13 is a through end, the third port 14 is a coupling end, and the fourth port 15 is an isolated end. The respective pairs of second metal strips 118 are symmetrical about a horizontal center axis of the joined rectangular metal sheets 119.

The metal patch 16 covers the lower surface of the dielectric sheet 10. The dielectric plate was a silica substrate having a thickness of 1 μm and a dielectric constant of 3.8. The metal patch may be copper.

In the present embodiment, the U-shaped upper portion 111 and the U-shaped bottom portion 112 have a width W1 of 0.5 μm, and the U-shaped upper portion 111 and the U-shaped bottom portion 112 have a length L1 of 4.55 μm, and the U-shaped upper portion and the U-shaped portion The height L2 of the bottom portion is 10 micrometers, and the opening width S1 of the U-shaped upper portion 111 and the U-shaped bottom portion 112 is 3.55 micrometers; the length W2 of the first rectangular portion 113 and the second rectangular portion 114 is 3.15 micrometers, the first The height L3 of one rectangular portion 113 and the second rectangular portion 114 is 17 micrometers, the horizontal distance S2 of the first rectangular portion 113 and the second rectangular portion 114 is 1.35 micrometers; and the length L6 of the first metal strip 117 is 23 Micron, the height W3 of the first metal strip 117 is 0.7 micron; the length L4 of the second metal strip 118 is 23 micrometers, and the height W4 of the second metal strip 118 is 0.2 micrometer; the first metal strip The vertical distance S3 of the pair of second metal strips 118 symmetrically disposed on the upper and lower sides thereof is 0.2 micrometers; the horizontal distance S4 of the pair of second metal strips 118 symmetrically disposed on the upper and lower sides of the first metal strip 117 is 1.75 micrometers; the length L5 of the rectangular metal piece 119 is 10 micrometers, and the height W of the rectangular metal piece 119 5 is 1.9 microns.

The width of the first graphene patch 115 is 0.5 μm, and the width Wb of the second graphene patch 116 is 0.55 μm; the chemical potential of the first graphene patch 115 and the second graphite The chemical potential of the ene patch is adjusted from 0 eV to 0.3 eV. It should be noted that by applying different voltages to the first graphene patch 115 and the second graphene patch 116, different chemistries can be imparted to the first graphene patch 115 and the second graphene patch 116. Potential.

Referring to FIG. 3, FIG. 3 is a schematic diagram of S-parameter results of the reflection coefficient of the graphene-based adjustable power distribution ratio coupler simulated by the electromagnetic simulation software. The embodiment of the present invention adopts five simulation cases, in which the chemical potential loaded on the first graphene patch 115 is μc1, and the second graphene patch is loaded on the second graphene patch. The chemical potential is μc2. Case 1: μc1 = 0.3 eV (electron volts), μc2 = 0 eV (electron volts); Case 2: μc1 = 0 eV (electron volts), μc2 = 0 eV (electron volts); Case 3: μc1 = 0.1 eV ( Electron volts, μc2 = 0.2 eV (electron volts); Case 4: μc1 = 0.1 eV (electron volts), μc2 = 0.1 eV (electron volts); Case 5: μc1 = 0 eV (electron volts), μc2 = 0.2 eV (Electronic Volt). As can be seen from FIG. 3, the graphene-based adjustable power distribution ratio coupler 1 has an operating frequency of 1.47 based on the graphene-based adjustable power distribution ratio of the coupler 1 when the reflection coefficient is greater than -10 dB. 2.3 THz (terahertz) for broadband characteristics.

Referring to FIG. 4, FIG. 4 is an isolation between the first port 12 (input) and the fourth port 15 (isolated) when the graphene-based adjustable power distribution ratio coupler is simulated by the electromagnetic simulation software. Schematic diagram of the results. As can be seen from Figure 4, the isolation between the first port 12 (input) and the fourth port 15 (isolated) of the above five simulation cases is less than -10 dB in the 1.47-2.3 THz frequency range. The graphene-based adjustable power distribution ratio coupler 1 works well in the 1.47-2.3 THz frequency range.

Referring to FIG. 5, FIG. 5 is a phase diagram of the second port 13 (straight end) and the third port 14 (coupling end) when the graphene-based adjustable power distribution ratio coupler is simulated by the electromagnetic simulation software. Schematic diagram of the difference results. It can be seen from FIG. 5 that the phase difference between the second port 13 (straight end) and the third port 14 (coupling end) of the above five simulation cases is around 90 degrees, and the deviation is between 86.2 degrees and 92.2 degrees. The graphene-based tunable power distribution ratio coupler 1 works well in the 1.47-2.3 THz frequency range.

Referring to FIG. 6, FIG. 6 is a power distribution ratio of the second port 13 (straight end) and the third port 14 (coupling end) when the graphene-based adjustable power distribution ratio coupler is simulated by the electromagnetic simulation software. The result is schematic. It can be seen from Figure 6 that the above five simulation cases are at 1.75 GHz, and the power difference between the second port 13 (straight end) and the third port 14 (coupling end) of Case 1 is 5.4 dB; the second of Case 2 The power difference between port 13 (straight through) and third port 14 (coupled) is 6.6 dB; the power difference between second port 13 (straight through) and third port 14 (coupled) in case 3 is 8 dB The power difference between the second port 13 (straight end) and the third port 14 (coupling end) of Case 4 is 8.46 dB; the second port 13 (straight end) and the third port 14 (coupling end) of Case 5 The power difference is 9.56 dB.

The above is only a preferred embodiment of the present invention, and is not intended to limit the scope of the patents of the present invention. Any equivalent structure or equivalent flow transformation made by the specification and the drawings of the present invention may be directly or indirectly applied to other related The technical fields are all included in the scope of patent protection of the present invention.

Industrial applicability

Claims

A graphene-based adjustable power distribution ratio coupler, comprising: a dielectric plate, a resonance ring disposed on a surface of the dielectric plate, a first port, a second port, a third port, and a fourth port, And a metal patch disposed on a lower surface of the dielectric plate, wherein: the resonant ring includes a U-shaped upper portion and a U-shaped bottom opposite to each other, the U-shaped upper portion and the U-shaped bottom passing through the first rectangular portion and the second portion a rectangular portion is connected; a first graphene patch is disposed on the inner wall of the U-shaped upper portion and the U-shaped bottom portion, and the second graphene patch is disposed on each of the inner walls of the first rectangular portion and the second rectangular portion. a first metal strip is connected to each of the two sides of the open end of the U-shaped upper portion and the U-shaped bottom, and a pair of second metal strips are symmetrically disposed on the upper and lower sides of each of the first metal strips. The outer ends of the second metal strip are connected to a rectangular metal piece to form a first port, a second port, a third port and a fourth port, respectively; The metal patch covers a lower surface of the dielectric plate; the U-shaped upper portion and a vertical central axis of the U-shaped bottom coincide, the first rectangular portion and the second rectangular portion being symmetrical about the central axis; The second metal strip is symmetrical about the horizontal center axis of the joined rectangular metal sheets.
The graphene-based adjustable power distribution ratio coupler according to claim 1, wherein said metal patch has the same size as said dielectric plate; and said U-shaped upper portion and U-shaped bottom portion are sized The same; the first rectangular portion and the second rectangular portion have the same size.
The graphene-based adjustable power distribution ratio coupler according to claim 2, wherein a thickness of the U-shaped upper portion and the U-shaped bottom portion is the same as a thickness of the first graphene patch; The thickness of one of the rectangular portion and the second rectangular portion is the same as the thickness of the second graphene patch.
The graphene-based adjustable power distribution ratio coupler according to claim 3, wherein the U-shaped upper portion and the U-shaped bottom portion have a width of 0.5 μm, and the U-shaped upper portion and the U-shaped bottom portion have a length of 4.55 μm, the U-shaped upper portion and the U-shaped bottom have a height of 10 μm, the U-shaped upper portion and the U-shaped bottom have an opening width of 3.55 μm; and the first rectangular portion and the second rectangular portion have a length of 3.15 μm. The height of the first rectangular portion and the second rectangular portion is 17 micrometers, the horizontal distance between the first rectangular portion and the second rectangular portion is 1.35 micrometers; the length of the first metal strip is 23 micrometers, The height of the first metal strip is 0.7 micron; the length of the second metal strip is 23 micrometers, and the height of the second metal strip is 0.2 micrometer; the first metal strip is symmetrically disposed with the upper and lower sides thereof The vertical distance of the two metal strips is 0.2 micrometer; the horizontal distance between the first metal strip and the pair of second metal strips symmetrically disposed on the upper and lower sides thereof is 1.75 micrometers; the length of the rectangular metal strip is 10 micrometers. The height of the rectangular metal piece is 1.9 microns.
The graphene-based adjustable power distribution ratio coupler according to claim 4, wherein the first graphene patch has a width of 0.5 μm and the second graphene patch has a width of 0.55 μm. .
The graphene-based adjustable power distribution ratio coupler according to claim 5, wherein an adjustment interval of a chemical potential of the first graphene patch and a chemical potential of the second graphene patch is 0 eV to 0.3 eV.
The graphene-based adjustable power distribution ratio coupler according to claim 6, wherein the dielectric plate is a silicon dioxide substrate having a thickness of 1 μm and a dielectric constant of 3.8.
The graphene-based adjustable power distribution ratio coupler according to claim 7, wherein the coupler operates at a frequency of 1.47-2.3 when the reflection coefficient is greater than -10 dB. THz.