CN108258430A - One kind is cracked I-shaped left-handed material - Google Patents
One kind is cracked I-shaped left-handed material Download PDFInfo
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- CN108258430A CN108258430A CN201711489379.7A CN201711489379A CN108258430A CN 108258430 A CN108258430 A CN 108258430A CN 201711489379 A CN201711489379 A CN 201711489379A CN 108258430 A CN108258430 A CN 108258430A
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- medium substrate
- handed material
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- copper facing
- shaped
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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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- Shielding Devices Or Components To Electric Or Magnetic Fields (AREA)
- Aerials With Secondary Devices (AREA)
Abstract
It cracks I-shaped left-handed material the invention discloses one kind, including the cellular construction being made of medium substrate, the medium substrate is made of dielectric constant of 4~4.8, loss tangent value of 0.02 epoxy resin plate material, the height of the medium substrate is 3~3.7mm, width is 1~1.8mm, and thickness is 0.3~0.7mm；The side of medium substrate is coated with the copper facing of dies, and the vertical copper facing both ends of the dies protrude from the lateral copper facing of both sides；The cellular construction expands extension along 3 D stereo direction and has been interconnected to form the I-shaped array that cracks respectively, the direction for cracking I-shaped array along X-axis is set as preferable magnetic boundary condition PHC, perfact conductor boundary condition PEC is set as along Z-direction, electromagnetic wave is along Y direction, it is incident to left-handed material from left to right, setting energisation mode is encouraged for wave impedance.The left-handed material have the characteristics that broadband, low-loss, junior unit, it is simple in structure, be easy to make.
Description
Technical field
The present invention relates to Meta Materials fields, and in particular to one kind is cracked I-shaped left-handed material.
Background technology
Veselago proposes the concept of left-handed material in nineteen sixty-eight, and points out its dielectric constant and magnetic conductivity in certain electricity
It is simultaneously negative in magnetic wave frequency range, and many unusual with negative refraction, perfect lens effect, inverse Doppler effects etc.
Electromagnetic property.Just because of these special electromagnetic properties, just so that left-handed material is in optical imagery, antenna system, microwave
The fields such as device and electromagnetism stealth have extensive and important application.However this theoretical ability after 30 years is by Smith
It is realized for the first time by the form of plain conductor and split ring resonator combination.Henceforth, the research of left-handed material, which has been gone on, flies
Speed develops to obtain fast traffic lane.
In the time of nearly more than ten years, left-handed material has obtained significant progress, various different designs types constantly by
It proposes.Generally, these structures can be divided into two types according to the incident direction of electromagnetic wave：One kind is parallel incident Jie of electromagnetic wave
Matter substrate form, such as H-shaped structure, symmetrical ring structure, " huge " character form structure, omega structure；Another kind is that electromagnetic wave is parallel
Incident medium substrate form, such as metal wire is to structure, fishing net structure, grid-shaped structure.But vertical incidence structure relative to
Parallel incidence has the shortcomings that apparent, such as is easy to cause screen effect (screening effects), absorption loss
(absorption loss) is larger etc..And that these shortcomings are all real-world environments to be avoided as possible is in parallel incidence structure,
Single side and two kinds two-sided can be divided by structure type again.Two-sided structure in the both sides of medium substrate due to will all carry out structure erosion
It carves, the difficulty of making is increased, while loss is also universal bigger than normal, nor the first choice of utility structure.So single side is put down at this stage
The incident left-handed material structure of row is the Main way of research.There are a variety of single-sided structures at present, such as the ten of Nasrin
Word metal wire is to the left-handed material of structure, left-handed material that the magnetic resonators of Chen Chunhui are combined with coplanar short plain conductor, poplar
The Roundabout structure in morning and double S types structures of Sun Yongzhi etc..And these structures in the prevalence of complicated, narrow bandwidth,
A series of problems, such as loss is greatly and volume is big, seriously limits the application and development of left-handed material.
Invention content
The purpose of the invention is to overcome deficiency of the prior art, one kind is provided and is cracked I-shaped left-handed material, it should
Left-handed material have the characteristics that broadband, low-loss, junior unit, it is simple in structure, be easy to make.
The purpose of the present invention is what is be achieved through the following technical solutions：
One kind is cracked I-shaped left-handed material, and including the cellular construction being made of medium substrate, the medium substrate is by being situated between
Electric constant is made of 4~4.8, loss tangent value of 0.02 epoxy resin plate material, the height of the medium substrate for 3~
3.7mm, width are 1~1.8mm, and thickness is 0.3~0.7mm；The side of medium substrate is coated with the copper facing of dies, institute
The vertical copper facing both ends for stating dies protrude from the lateral copper facing of both sides；The cellular construction divides along 3 D stereo direction
It Kuo Zhang not extend and be interconnected to form the I-shaped array that cracks, the direction for cracking I-shaped array along X-axis is set as managing
Think magnetic boundary condition PHC, be set as perfact conductor boundary condition PEC along Z-direction, electromagnetic wave enters from left to right along Y direction
Left-handed material is incident upon, setting energisation mode is encouraged for wave impedance.
The material for being similar to air between cellular construction by dielectric constant is connected with each other.
The copper-plated width is 0.10~0.15mm.
Compared with prior art, advantageous effect caused by technical scheme of the present invention is：
By simulation analysis obtain left-handed material of the present invention in 8.58GHz~13.55GHz frequency ranges effective dielectric constant,
Equivalent permeability, refractive index are negative, absolute bandwidth 4.97GHz simultaneously, relative bandwidth 44.92%, and unit electric size is only
0.05, unit is lost down to 0.29dB, and it is a kind of outstanding one-dimensional single side left-handed material to embody the material.
Description of the drawings
Fig. 1 is left-handed material cellular construction of the present invention and dimensional structure schematic diagram.
Fig. 2 is cellular construction figure of the left-handed material for emulation..
Fig. 3 is the equivalent circuit diagram of left-handed material simulation architecture in Fig. 2.
Fig. 4 (a) and Fig. 4 (b) is respectively the amplitude simulation result of S parameter and phase simulation result.
Fig. 5 (a), (b), (c) be respectively effective dielectric constant, magnetic conductivity, refractive index electromagnetic parameter analogous diagram.
Fig. 6 is effective electromagnetic parameter comparison diagram.
Specific embodiment
The invention will be further described below in conjunction with the accompanying drawings.
As shown in Figure 1 to Figure 3, one kind is cracked I-shaped left-handed material, including the cellular construction being made of medium substrate 1,
Medium substrate is made by common FR4 (epoxy resin) plate material in the present embodiment, relative dielectric constant 4.4, loss tangent
It is 0.02 to be worth, height h=3.36mm, width a=1.40mm, thickness 0.50mm, and the side of medium substrate is coated with " work " font
The copper facing of structure 2, the vertical copper facing both ends of dies 2 protrude from the lateral copper facing of both sides, are formed with the I-shaped to crack
Section bar material.Specific dimensional parameters of the left-handed material structure after HFSS software optimizations design are as follows：L1=3.16mm, l2=
2.60mm, the width of all copper-plated metal lines is ω=0.12mm, and plating copper thickness is 0.035mm.
The cellular construction of left-handed material is expanded according to 1x4x1 to three directions of 3-D walls and floor in the present embodiment, is formed
Array as shown in Fig. 2, its simulation architecture unit size is 0.535mm*6.05mm*3.36mm, passes through dielectric between cellular construction
The material that constant is similar to air is connected with each other, such as foam, two-sided sponge；Perimeter strip is carried out to the simulation unit structure in Fig. 2
The setting of part and energisation mode：Preferable magnetic boundary condition PHC is set as along the direction of X-axis, fore-and-aft clearance is set as 1.524mm,
Perfact conductor boundary condition PEC is set as along Z-direction, between the upper and lower away from 3.36mm is set as, electromagnetic wave is along Y direction, from a left side
It is incident on left-handed material inside configuration of the present invention to the right, setting energisation mode is wave impedance excitation, between left and right away from for 6.05mm.Such as
Shown in Fig. 2, the unit simulation architecture of the I-shaped left-handed material of cracking in the present embodiment is 1 × 4 × 1, as one-dimensional left hand knot
Structure, in the y-axis direction with left hand characteristic.Fig. 3 is the corresponding equivalent circuit diagram of unit simulation architecture, and there are series capacitances in figure
And shunt inductance, meet left hand transmission line circuit, imply the presence of left hand frequency band.
Low-limit frequency is set as when S parameter amplitude curve and the phase curve as shown in Figure 4 obtained by HFSS softwares is emulated
7.00GHz, highest frequency are set as 14.00GHz, and frequency interval is 0.01GHz. from Fig. 4 (a) as can be seen that S11 and S21 is humorous
It shakes and is a little located at 8.06GHz and 13.36GHz, return loss is -45.36dB. from Fig. 4 (b) as can be seen that the phase of S21 exists
Mutation takes place at 8.54GHz, indicates the beginning of double negative regions, and the amplitude of S21 is more than -1.17dB in passband, says
The transmission loss of bright average each cellular construction is less than 0.29dB.
Smith proposes S parameter method within 2005, it can accurately and rapidly be extracted by the phase and amplitude of S parameter
The out effective electromagnetic parameter of left-handed material has been commonly utilized in left-handed material field now.By one section of MATLAB code,
Effective electromagnetic parameter is extracted from S parameter：Effective dielectric constant, equivalent permeability, refractive index.It is same by finding out three's real part
When for negative ghz area, to determine the left hand frequency range of structure of the present invention.
As shown in Fig. 5 (a) to Fig. 6, effective dielectric constant, magnetic conductivity, refractive index are in 8.58GHz~13.55GHz
Negative, common frequency band is the left hand frequency range of the structure.
1 effective electromagnetic parameter of table with frequency variation tendency
| Effective electromagnetic parameter | Frequency/GHz |
| ε<0 | 8.58-14.00 |
| μ<0 | 8.58-13.55 |
| n<0 | 8.58-13.85 |
As shown in table 1, it can be seen that the structure effective dielectric constant, equivalent magnetic in 8.58GHz~13.55GHz frequency ranges
Conductance, refractive index are negative, absolute bandwidth 4.97GHz simultaneously, and relative bandwidth 44.92%, unit electric size is only 0.05, single
Down to 0.29dB, it is a kind of outstanding one-dimensional single side left-handed material to embody the I-shaped structure of the invention that cracks for member loss.
The present invention is not limited to embodiments described above.The description of specific embodiment is intended to describe and be said above
Bright technical scheme of the present invention, above-mentioned specific embodiment is only schematical, is not restricted.This is not being departed from
In the case of invention objective and scope of the claimed protection, those of ordinary skill in the art may be used also under the enlightenment of the present invention
The specific transformation of many forms is made, within these are all belonged to the scope of protection of the present invention.
Claims (3)
- The I-shaped left-handed material 1. one kind is cracked, which is characterized in that including the cellular construction being made of medium substrate, the medium Substrate is made of dielectric constant of 4~4.8, loss tangent value of 0.02 epoxy resin plate material, the height of the medium substrate It spends for 3~3.7mm, width is 1~1.8mm, and thickness is 0.3~0.7mm；The dies that the side of medium substrate is coated with Copper facing, the vertical copper facing both ends of the dies protrude from the lateral copper facing of both sides；The cellular construction edge is three-dimensional Stereo directional expands extension and has been interconnected to form the I-shaped array that cracks, the side of the I-shaped array along X-axis of cracking respectively To being set as preferable magnetic boundary condition PHC, perfact conductor boundary condition PEC is set as along Z-direction, electromagnetic wave along Y direction, It is incident to left-handed material from left to right, setting energisation mode is encouraged for wave impedance.
- 2. one kind is cracked I-shaped left-handed material according to claim 1, which is characterized in that passes through dielectric between cellular construction The material that constant is similar to air is connected with each other.
- 3. one kind is cracked I-shaped left-handed material according to claim 1, which is characterized in that copper-plated width for 0.10~ 0.15mm。
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711489379.7A CN108258430A (en) | 2017-12-30 | 2017-12-30 | One kind is cracked I-shaped left-handed material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711489379.7A CN108258430A (en) | 2017-12-30 | 2017-12-30 | One kind is cracked I-shaped left-handed material |
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| Publication Number | Publication Date |
|---|---|
| CN108258430A true CN108258430A (en) | 2018-07-06 |
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| CN201711489379.7A Pending CN108258430A (en) | 2017-12-30 | 2017-12-30 | One kind is cracked I-shaped left-handed material |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20100053019A1 (en) * | 2007-05-08 | 2010-03-04 | Asahi Glass Company, Limited | Artificial medium, its manufacturing method, and antenna device |
| WO2011114746A1 (en) * | 2010-03-19 | 2011-09-22 | 日本電気株式会社 | Structure |
| CN104241866A (en) * | 2014-07-10 | 2014-12-24 | 杭州电子科技大学 | Broadband low-consumption junior unit left-handed material based on double crosses |
| CN205488534U (en) * | 2015-12-31 | 2016-08-17 | 深圳光启高等理工研究院 | Super material structure and metamaterial antennas cover |
| CN205564982U (en) * | 2016-04-15 | 2016-09-07 | 西华大学 | Microstrip array antenna based on super material structure |
-
2017
- 2017-12-30 CN CN201711489379.7A patent/CN108258430A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20100053019A1 (en) * | 2007-05-08 | 2010-03-04 | Asahi Glass Company, Limited | Artificial medium, its manufacturing method, and antenna device |
| WO2011114746A1 (en) * | 2010-03-19 | 2011-09-22 | 日本電気株式会社 | Structure |
| CN104241866A (en) * | 2014-07-10 | 2014-12-24 | 杭州电子科技大学 | Broadband low-consumption junior unit left-handed material based on double crosses |
| CN205488534U (en) * | 2015-12-31 | 2016-08-17 | 深圳光启高等理工研究院 | Super material structure and metamaterial antennas cover |
| CN205564982U (en) * | 2016-04-15 | 2016-09-07 | 西华大学 | Microstrip array antenna based on super material structure |
Non-Patent Citations (1)
| Title |
|---|
| 何政蕊: "新型左手材料的设计与实现", 《万方学位论文》 * |
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Application publication date: 20180706 |