CN110061358B - Double-frequency band round-shaped left-handed material unit - Google Patents
Double-frequency band round-shaped left-handed material unit Download PDFInfo
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- CN110061358B CN110061358B CN201910392503.0A CN201910392503A CN110061358B CN 110061358 B CN110061358 B CN 110061358B CN 201910392503 A CN201910392503 A CN 201910392503A CN 110061358 B CN110061358 B CN 110061358B
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- 239000000463 material Substances 0.000 title claims abstract description 32
- 230000009977 dual effect Effects 0.000 claims description 7
- 238000004891 communication Methods 0.000 abstract description 2
- 230000035699 permeability Effects 0.000 description 7
- 239000002184 metal Substances 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 230000000737 periodic effect Effects 0.000 description 2
- 239000013598 vector Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000005684 electric field Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
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Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/36—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith
- H01Q1/38—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith formed by a conductive layer on an insulating support
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q15/00—Devices for reflection, refraction, diffraction or polarisation of waves radiated from an antenna, e.g. quasi-optical devices
- H01Q15/0006—Devices acting selectively as reflecting surface, as diffracting or as refracting device, e.g. frequency filtering or angular spatial filtering devices
- H01Q15/0086—Devices acting selectively as reflecting surface, as diffracting or as refracting device, e.g. frequency filtering or angular spatial filtering devices said selective devices having materials with a synthesized negative refractive index, e.g. metamaterials or left-handed materials
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Abstract
The invention discloses a double-frequency band circular left-handed material unit, which relates to the field of wireless communication and comprises a dielectric plate (4) and a circular patch (5) printed on the dielectric plate (4); the circular patch (5) consists of two external semicircles, two internal semicircles and a microstrip line (3) passing through the center of a circle; the two outer semicircles are arranged up and down, and the two inner semicircles rotate 90 degrees around the circle center compared with the outer semicircles and are arranged left and right; two symmetrical gaps are arranged between the two outer semicircles, and four symmetrical gaps are arranged between the two inner semicircles and the microstrip line (3). The double-frequency band circular-shape left-handed material unit has the advantages of simple structure, easy realization and low cost.
Description
Technical Field
The invention belongs to the field of wireless communication, and relates to a double-frequency band circular-loop left-handed material unit.
Background
Left-hand materials are the most classical metamaterials and are defined as having both negative permittivity and negative permeability in certain frequency bands. Is composed of artificial unit structures with periodic dimensions much smaller than the operating wavelength, and such materials can exhibit extraordinary physical properties that are not possessed by natural materials.
As early as 1968, the theoretical physicist of soviet union, vesselago, through careful study of maxwell's equations, found that when an electromagnetic wave propagates in a material whose permeability and permittivity are both negative, the phase velocity and the group velocity of the electromagnetic wave propagation both exhibit an inverted state, so that three vectors of an electric field E, a magnetic field H, and a propagation direction K are in a left-hand relationship with each other, exhibiting a left-hand spiral rule with respect to a right-hand spiral rule, and thus defining this material as LHM.
In 1996, the Pendry teaching of the imperial academy of technology in the united kingdom, when using metal filaments in experiments to construct low frequency plasma materials, found that the thin metal filaments in a periodic arrangement possess a negative dielectric constant. In 1999, the Pendry professor et al further proposed a split-ring resonator (Split Ring Resonator, SRR) structure.
Thereafter, a series of classical sub-wavelength structured left-hand material units are successively proposed, for example: an omega-shaped left-handed material with negative refractive index, a combined metamaterial structure with a split resonant ring structure providing negative magnetic permeability and an I-shaped structure providing negative dielectric constant, a metamaterial composed of two S-shaped resonant rings with different sizes, and the like.
The common characteristic of the metamaterial is that the wave vector direction of the incident wave is required to be in the same horizontal plane with the plane of the metamaterial unit, so that the application range of the metamaterial is greatly restricted, and the metamaterial is difficult to apply to practice. Furthermore, scholars have proposed a planar metamaterial structure, which is formed by using a metal wire with a limited length, and can generate negative magnetic permeability and negative dielectric constant in the same frequency band under the condition that electromagnetic waves are perpendicularly incident. Compared with the prior metamaterial structure, the dimension of the planar metamaterial structure unit in the propagation direction can be equal to the wavelength of the irradiated electromagnetic wave, so that the planar metamaterial structure unit has a wider application range. It is clear that planar metamaterials have more value to study than metamaterials of the type consisting of metal wires and split resonant rings.
Disclosure of Invention
The invention aims at: aiming at the problems, the double-frequency-band circular-loop-shaped left-handed material unit is simple in structure, easy to realize and low in cost, and forms a double-frequency-band left-handed frequency band.
The technical scheme adopted by the invention is as follows:
the invention relates to a double-frequency band circular left-handed material unit, which comprises a dielectric plate and a circular patch printed on the dielectric plate; the circular patch consists of two external semicircles, two internal semicircles and a microstrip line passing through the center of the circle; the two outer semicircles are arranged up and down, and the two inner semicircles rotate 90 degrees around the circle center compared with the outer semicircles and are arranged left and right; two symmetrical gaps are arranged between the two outer semicircles, and four symmetrical gaps are arranged between the two inner semicircles and the microstrip line.
Preferably, two gaps between the two outer semicircles and four gaps between the two inner semicircles and the microstrip line at the center of the circle are the same in size, magnetic resonance is generated, and the equivalent capacitance of the structure can be adjusted by adjusting the gaps.
Preferably, the two outer semicircles produce an electrical resonance, and adjusting the dimensions of the two outer semicircles adjusts the equivalent inductance.
Preferably, the dielectric plate is a Rogress RO4003 dielectric plate having a thickness of 0.8mm and a size of 5mmX5mm.
The double-frequency band circular-shaped left-handed material unit can realize stronger resonance and reduce the size of the unit.
In summary, due to the adoption of the technical scheme, the beneficial effects of the invention are as follows: the double-frequency-band circular-loop-shaped left-handed material unit has the advantages of simple structure, easy realization and low cost, and simultaneously forms a double-frequency-band left-handed frequency band.
Drawings
The invention will now be described by way of example and with reference to the accompanying drawings in which:
fig. 1 is a schematic structural diagram of a dual band circular left handed material unit of the present invention.
Figure 2 shows the magnitude of the S parameter of the dual band circular loop left hand material element of the present invention.
Fig. 3 phase of S-parameters of a dual band circular loop left-handed material unit of the present invention.
Fig. 4 shows the dielectric constant of a dual band circular left-handed material cell of the present invention.
Fig. 5 shows the effective permeability of the dual band circular left hand material element of the present invention.
Fig. 6 refractive index of a dual band circular left hand material element of the present invention.
The marks in the figure: 1 is a first outer semicircle, 1' is a second outer semicircle, 2 is a first inner semicircle, 2' is a second inner semicircle, 3 is a microstrip line, 4 is a dielectric plate, 5 is a circular patch, 6 is a first ground slot, 6' is a second ground slot, 7 is a third ground slot, 7' is a fifth ground slot, 8 is a fourth ground slot, and 8' is a sixth ground slot.
Detailed Description
All of the features disclosed in this specification, or all of the steps in a method or process disclosed, may be combined in any combination, except for mutually exclusive features and/or steps.
Any feature disclosed in this specification (including any accompanying claims, abstract) may be replaced by alternative features serving the same, equivalent or similar purpose, unless expressly stated otherwise. That is, each feature is one example only of a generic series of equivalent or similar features, unless expressly stated otherwise.
As shown in fig. 1, the dual-band circular left-handed material unit of the present invention comprises a dielectric plate 4 and a circular patch 5 printed on the dielectric plate 4; the circular patch 5 is composed of two external semicircle, two internal semicircle and a micro-strip line 3 passing through the center of the circle; the two outer semicircles are arranged up and down, and the two inner semicircles rotate 90 degrees around the circle center compared with the outer semicircles and are arranged left and right; two symmetrical gaps are arranged between the two outer semicircles, and four symmetrical gaps are arranged between the two inner semicircles and the microstrip line 3.
In an embodiment, the two outer semicircles comprise a first outer semicircle 1 and a second outer semicircle 1'; the two inner semicircles comprise a first inner semicircle 2 and a second inner semicircle 2'; a first ground gap 6 and a second ground gap 6 'are arranged between the first outer semicircle 1 and the second outer semicircle 1'; a third ground gap 7, a fourth ground gap 8, a fifth ground gap 7' and a sixth ground gap 8' are respectively arranged between the first inner semicircle 2 and the second inner semicircle 2' and the microstrip line 3 of the circle center; the size of the gaps is the same, magnetic resonance is generated, and the equivalent capacitance of the structure can be adjusted by adjusting the gaps.
In an embodiment, the two outer half-circles generate an electrical resonance, and adjusting the dimensions of the two outer half-circles adjusts the equivalent inductance.
In an embodiment, the dielectric plate 4 is a Rogress RO4003 dielectric plate having a thickness of 0.8mm and a size of 5mmX5mm.
The double-frequency band circular-shaped left-handed material unit can realize stronger resonance and reduce the size of the unit.
Simulation results show that the scattering parameters of the double-band circular-loop left-handed material unit are shown in fig. 2 and 3, wherein fig. 2 describes the amplitude of the S parameter, and fig. 3 describes the phase of the S parameter.
As shown in fig. 2, the amplitude variations of S11 and S21 show a trough and a projection peak around 9.8GHz, respectively, while a trend variation of trough and projection peak is shown in the direction toward 0GHz, and as shown in fig. 3, the amplitude variations of S11 and S21 show a large amplitude phase variation around 6.5GHz, 8GHz, 10GHz, and 11GHz, respectively.
The effective parameters of the obtained circular-loop left-handed material unit are shown in fig. 4 and 5 by using an equivalent parameter extraction method, wherein fig. 4 is an effective dielectric constant, fig. 5 is an effective magnetic permeability, it can be seen from fig. 4 that the real part of the effective dielectric constant is negative in the whole frequency range of 0-15GHz, and in fig. 5, other frequency ranges of 0-15GHz are below zero except that the real part of the effective magnetic permeability is positive in the frequency range of 7.5-8.2 GHz, and further the refractive index of the obtained circular-loop left-handed material unit is shown in fig. 6, except that the refractive index in the frequency range of 7.3-7.7 GHz is zero, and the refractive index of the material unit is negative in the other frequency ranges of 0-15GHz, so that the left-handed material unit is realized.
The invention is not limited to the specific embodiments described above. The invention extends to any novel one, or any novel combination, of the features disclosed in this specification, as well as to any novel one, or any novel combination, of the steps of the method or process disclosed.
Claims (2)
1. The double-frequency band round left-handed material unit is characterized in that: comprises a dielectric plate (4) and a round patch (5) printed on the dielectric plate (4); the circular patch (5) consists of two external semicircles, two internal semicircles and a microstrip line (3) passing through the center of a circle; the two outer semicircles are arranged up and down, and the two inner semicircles rotate 90 degrees around the circle center compared with the outer semicircles and are arranged left and right; two symmetrical gaps are arranged between the two outer semicircles, and four symmetrical gaps are arranged between the two inner semicircles and the microstrip line (3); two gaps between the two external semicircles and four gaps between the two internal semicircles and the microstrip line (3) with the circle center have the same size, generate magnetic resonance, and can adjust the equivalent capacitance of the structure by adjusting the gaps; the two outer semicircles generate electric resonance, and the equivalent inductance can be adjusted by adjusting the sizes of the two outer semicircles.
2. The dual band round loop left handed material unit of claim 1 wherein: the dielectric plate (4) was a Rogress RO4003 dielectric plate having a thickness of 0.8mm and a size of 5mmX5mm.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910000702 | 2019-01-02 | ||
| CN2019100007022 | 2019-01-02 |
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| Publication Number | Publication Date |
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| CN110061358A CN110061358A (en) | 2019-07-26 |
| CN110061358B true CN110061358B (en) | 2023-12-15 |
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|---|---|---|---|---|
| CN101976759A (en) * | 2010-09-07 | 2011-02-16 | 江苏大学 | Equivalent LHM (Left Handed Material) patch antenna of split ring resonators |
| CN102124382A (en) * | 2008-06-19 | 2011-07-13 | 雷文布里克有限责任公司 | Optical metapolarizer device |
| CN103427159A (en) * | 2013-08-13 | 2013-12-04 | 江苏大学 | Multilayer composite frame patch antenna with left-handed materials of compound lattice structures |
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| CN203950926U (en) * | 2014-07-07 | 2014-11-19 | 南京邮电大学 | A kind of micro-strip paster antenna |
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| CN209747735U (en) * | 2019-01-02 | 2019-12-06 | 云南大学 | Dual-band circular-loop left-handed material unit |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AU2001249241A1 (en) * | 2000-03-17 | 2001-10-03 | The Regents Of The University Of California | Left handed composite media |
| WO2008121159A2 (en) * | 2006-10-19 | 2008-10-09 | Los Alamos National Security Llc | Active terahertz metamaterial devices |
| US7525506B2 (en) * | 2007-06-25 | 2009-04-28 | Industrial Technology Research Institute | Antenna apparatus and antenna radome and design method thereof |
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2019
- 2019-05-13 CN CN201910392503.0A patent/CN110061358B/en active Active
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| CN102124382A (en) * | 2008-06-19 | 2011-07-13 | 雷文布里克有限责任公司 | Optical metapolarizer device |
| CN101976759A (en) * | 2010-09-07 | 2011-02-16 | 江苏大学 | Equivalent LHM (Left Handed Material) patch antenna of split ring resonators |
| CN103682642A (en) * | 2012-08-31 | 2014-03-26 | 深圳光启创新技术有限公司 | Microstrip patch antenna |
| CN103427159A (en) * | 2013-08-13 | 2013-12-04 | 江苏大学 | Multilayer composite frame patch antenna with left-handed materials of compound lattice structures |
| CN203950926U (en) * | 2014-07-07 | 2014-11-19 | 南京邮电大学 | A kind of micro-strip paster antenna |
| CN105098344A (en) * | 2015-09-06 | 2015-11-25 | 西安电子科技大学 | Multi-notch ultra-wide band antenna with mechanically adjusted metasurfaces |
| CN107359421A (en) * | 2017-07-13 | 2017-11-17 | 厦门大学 | LHM based on goat's horn shape basic cell structure |
| CN108899656A (en) * | 2018-06-28 | 2018-11-27 | 西安电子科技大学 | A kind of Salisbury suction wave screen loading FSS |
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