CN106450783A - Wave structure-based umbrella-like special-shaped ring single-sided left-handed material - Google Patents
Wave structure-based umbrella-like special-shaped ring single-sided left-handed material Download PDFInfo
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- CN106450783A CN106450783A CN201610896304.XA CN201610896304A CN106450783A CN 106450783 A CN106450783 A CN 106450783A CN 201610896304 A CN201610896304 A CN 201610896304A CN 106450783 A CN106450783 A CN 106450783A
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- wave structure
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- circular arc
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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 relates to a wave structure-based umbrella-like special-shaped ring single-sided left-handed material and belongs to the left-handed material field. The wave structure-based umbrella-like special-shaped ring single-sided left-handed material is provided with a dielectric substrate of which one side is covered with a metal good conductor layer; an umbrella-like special-shaped ring of a wave structure is formed on the metal good conductor layer through etching; the upper part of the umbrella-like special-shaped ring of the wave structure is a half arc; the middle of the umbrella-like special-shaped ring is a wave structure which is perpendicular to the central symmetry axis of the umbrella-like special-shaped ring; the total length of the wave structure is equal to the sum of the diameter of the arc and the width of the arc; small gaps are left between the wave structure and the upper arc; the wave structure and the upper arc form the special-shaped ring; the central symmetry axis of the umbrella-like special-shaped ring of the wave structure is a straight metal rod; the straight metal rod perpendicularly passes through the wave structure through the arc top and extends to the bottom of the umbrella-like special-shaped ring so as to form the handle portion of the umbrella-like special-shaped ring; and the half arc is connected with the wave structure through the metal rod. The production process of the wave structure-based umbrella-like special-shaped ring single-sided left-handed material is very simple; the umbrella-like special-shaped ring single-sided structure has strong electrical resonance and magnetic resonance and is small in loss in double negative bands.
Description
Technical field
The present invention relates to LHM, especially relate to a kind of umbrella special-shaped ring one side left hand material based on wave structure
Material.
Background technology
LHM (Left-Handed Material) also known as double negative materials (Double Negative Material),
For right-handed material, have its effective dielectric constant and equivalent permeability in a certain frequency range is negative value simultaneously
Monopolizing characteristic.This imagination is taken the lead in proposing by former Soviet Union physicist V.G.Veselago[1], studied later persons from
Prove in theory and synthesized in an experiment.After the realization of LHM obtains the generally acknowledging of the world, new problem occurs again
, there is shortcomings in the material that professor Smith et al. proposes, as big in left-handed configuration unit size, big, double negative bandwidth is lost
Narrow, this makes LHM be limited by very large in the application.Therefore domestic and international large quantities of scholar start to turn to research other
Form or other shapes, the more preferable LHM of performance.Beijing Institute of Technology Hu Gengkai in 2006 et al.[2]Former based on LC resonance
Reason devises two kinds of bat type left-handed configuration.Northwestern Polytechnical University professor Zhao Xiaopeng in 2007 et al.[3]Have devised and there is double negative spy
Property one side H type left-handed configuration, but designed physical dimension is relatively big, the application being not easy in Practical Project.2009 she
Bright tower is than the Nasrin et al. of Aunar Mo Dalesi university[4]Propose the spiral resonant ring based on S type structure and double stick knot
Structure, can control the electric plasma frequency of spiral S structure thus reality by the width of regulation back side double stick and distance between the two
Existing frequency-adjustable.Within 2010, Texas ,Usa university Fabio Urbani proposes a two-dimension periodic rhombus one side left hand knot
Structure[5], very high transmission peaks (-8dB) can be produced in the case that effective dielectric constant and equivalent permeability are negative simultaneously, can be real
Now well mate.2011, the cross tangent line of a one side that Nasrin et al. proposes was to resonance structure[6], this structure has
High symmetry, has isotropic left hand to respond for any linear polarization incidence wave.2013, Xiamen University's microwave and photon
Seminar designs the Novel left-hand material structure unit that a kind of double " E " nested metal structure combines metal wire[7], coupling regulation
Rod can regulate LHM center frequency point and coupling depth easily.
LHM is applied in the design of microstrip antenna, has significant advantage relative to traditional microstrip antenna.
Such as can suppress surface wave effect, widen the beamwidth of antenna, the directionality improving antenna and gain, raising radiation efficiency, realization
Multiband, reduction antenna size etc..
After the LHM of SRR type structure, vast Chinese scholars research simultaneously devises various distressed structure, as：
Ω type structure[8-9], p-type structure[10], huge font structure[11], U-shape structure[12]Deng LHM unit.Cellular construction is also from initially
Two-sided progressively develop into single-sided structure, this not only is easier to obtain in manufacture craft, has been also convenient for LHM in actual work
Journey forms the application of stereochemical structure.
In last decade, the constructing technology aspect research to LHM is still very popular, main research purpose be for
Obtain the left-hand unit of the features such as negative frequency band smaller, double is wider, transmission becomes apparent from, frequency freedom is controlled.
Bibliography：
[1]Shelby R A,Smith D R,Schultz S.Experimental verification of a
negative index of refraction[J].science,2001,292(5514):77-79.
[2]Cai X,Hu G.Pat-shape Left-handed Material and Relative Band-width
of Analogous Metamaterials[C]//Biophotonics,Nanophotonics and Metamaterials,
2006.Metamaterials 2006.International Symposium on.IEEE,2006:502-505.
[3] Liu Yahong, Luo Chunrong, Zhao Xiaopeng. realize dielectric constant and magnetic conductivity for negative H type construction unit left hand simultaneously
Material [J]. Acta Physica Sinica, 2007,56 (10):5883-5889.
[4]Amiri N,Forooraghi K,Atlasbaf Z.Design and simulation of a novel
double negative metamaterial[C]//Microwave Conference,2009.APMC 2009.Asia
Pacific.IEEE,2009:728-730.
[5]Urbani F.Experimental Analysis of Novel Single-Sided Left-Handed
Metamaterial[J].IEEE Antennas&Wireless Propagation Letters,2010,9(1):720-723.
[6]Amiri N,Forooraghi K,Atlasbaf Z.A Wideband Uniplanar Polarization
Independent Left-Handed Metamaterial[J].IEEE Antennas&Wireless Propagation
Letters,2011,PP(7):1-1.
[7] Li Haixiong. numerical analysis research [D] of the design of microwave left-hand material cellular construction and electromagnetic property. Xiamen is big
Learn, 2013.
[8]Simovski C R,He S.Frequency range and explicit expressions for
negative permittivity and permeability for an isotropic medium formed by a
lattice of perfectly conducting ja:math particles[J].Physics Letters A,2003,
311(s 2–3):254-263.
[9]Simovski C R,Sauviac B.Toward creating isotropic microwave
composites with negative refraction[J].Radio Science,2004,39(2):571-583.
[10] Jin great Lin. LHM and the application study [D] at antenna thereof. University of Electronic Science and Technology, 2013.
[11] Yang Yiming, Qu Shaobo, Wang Jiafu, etc. by the left hand material that there is magnetic resonance and electric resonance structure forms simultaneously
Material [J]. Acta Physica Sinica, 2009,58 (2):1031-1035.
[12]Mallik A,Kundu S,Goni M O.Design of a novel two-rectangular U-
shaped double negative metamaterial[C]//Informatics,Electronics&Vision
(ICIEV),2013International Conference on.IEEE,2013:1-6.
Content of the invention
It is an object of the invention to, for deficiencies of the prior art, overcome the complexity of tradition LHM, carry
For having only to a kind of simple construction unit, it is possible to obtain wider DNG feature and negative index, with low cost, it is simple to raw
The umbrella special-shaped ring one side LHM based on wave structure producing.
The present invention is provided with the medium substrate that one side is covered with metal good conductor layer, and metal good conductor layer is etched with wave structure
Umbrella special-shaped ring, the top of the umbrella special-shaped ring of wave structure is half circular arc line, and middle part is one section and umbrella central symmetry axis
Vertical wave structure, the overall length of wave structure is equal to the diameter of circular arc line and the width sum of circular arc line, wave structure
Micro gap, wave structure and top circular arc line is had to constitute a special-shaped ring with top circular arc line；The umbrella abnormity of wave structure
It is metal bar always in the central symmetry axis of ring, pass perpendicularly through wave structure from circular arc top to bottom, form its shank, metal
Semicircle camber line and wave structure are coupled together by rod.
Described medium substrate can use microwave-medium substrate, and the dielectric constant of described medium substrate is 2～8, is just shaped as
Square, the square length of side is 7～14mm, and thickness is 0.5～1mm, and the thickness of described metal good conductor layer is 0.01～0.03mm.
Described circular arc line top is 0.4～0.7mm with the distance at the edge of medium substrate, and circular arc line is with medium substrate center
For the center of circle, the semi arch drawing for radius with 3.7～4.3mm；The width of described circular arc line is 0.2～0.4mm.
Described wave structure equally broken line is distributed, and wave number is 3～6, and wave width is 0.2～0.4mm, highly
It is 2～3mm.
In described central symmetry axis, the length of straight metal bar is equal with the length of side of medium substrate, is 7～14mm, and width is
0.2～0.6mm.
In the umbrella special-shaped ring structure of described wave structure, circular arc line and the spacing of wave structure are 0.04～0.08mm.
The construction unit of the present invention constitutes single or multiple lift material by cycle arrangement, and such periodic arrangement structure is overall
A kind of novel microwave left-hand material can be regarded as.Straight metal in the case of electromagnetic wave vertical incidence, in central symmetry axis
Bar construction array, produces electric resonance；Wave structure and circular arc line constitute two little resonant rings, produce magnetic resonance, thus obtain simultaneously
Double negative frequency range that must be wider and negative index frequency range.By the spacing of regulation circular arc line and wave structure, the radius of circular arc line and
The structural parameters such as the horizontal width of wave structure, it is possible to according to the actual requirements, it is thus achieved that a novel left side for different equivalent electromagnetic parameter
Hand material, thus obtain different left hand characteristic frequency ranges.
Compared with common LHM structure, the unit of LHM of the present invention is only the umbrella of the wave structure of one side
Special-shaped ring structure, more simpler than traditional two-sided LHM structure fabrication, and also size is less, is more suitable for being applied to antenna
With in microwave device；The umbrella special-shaped ring of wave structure is that one has compared with strong electromagnetic response and is easy to tuning, can make electroresponse
It is preferably mapped with magnetic response, there is wider double negative frequency range and negative index frequency range.The left-hand unit structure of the present invention
Show negative dielectric constant and negative magnetic permeability in 6.67～6.92GHz frequency range, in 6.68～7.18GHz frequency range
There is negative index characteristic.
The umbrella special-shaped ring one side LHM based on wave structure that the present invention provides, simple in construction, it is easy to processing, can
To realize DNG feature and negative index in wider frequency range.In actual applications, by the construction unit week of the present invention
Phase arranges, and under the effect of incident electromagnetic wave, circular arc line constitutes a little resonant ring with two openings with wave structure, produces
Magnetisation resonance；The straight metal bar of cycle arrangement produces electric resonance, by the knot of control circular arc line, wave structure and straight metal bar
Structure parameter just can change resonant frequency and the resonant intensity of electric current, thus changes the left hand characteristic of material.
Brief description
Fig. 1 is the structural representation of the embodiment of the present invention 1.
Fig. 2 is the embodiment of the present invention 1 waveguide port reflectance factor and transmission coefficient changes in amplitude schematic diagram.In fig. 2, horizontal
Coordinate is frequency/GHz, and ordinate is the amplitude of S parameter；Solid-line curve is parameter S11Changes in amplitude schematic diagram, imaginary curve for ginseng
Number S21Changes in amplitude schematic diagram.
Fig. 3 is waveguide port reflectance factor and transmission coefficient phase place change schematic diagram in the embodiment of the present invention 1.In figure 3,
Abscissa is frequency/GHz, and ordinate is the phase place/rad of the radian of S parameter；Solid-line curve is parameter S11Phase place change signal
Figure, imaginary curve is parameter S21Phase place change schematic diagram.
Fig. 4 is the effective dielectric constant schematic diagram of LHM in the embodiment of the present invention 1.In the diagram, abscissa is frequency
Rate/GHz, ordinate is the value of effective dielectric constant；Solid-line curve is the real part of effective dielectric constant, and imaginary curve is equivalence dielectric
The imaginary part of constant.
Fig. 5 is the equivalent permeability change schematic diagram of LHM in the embodiment of the present invention 1.In Figure 5, abscissa is frequency
Rate/GHz, ordinate is the value of equivalent permeability；Solid-line curve is the real part of equivalent permeability, and imaginary curve is equivalent permeability
Imaginary part.
Fig. 6 is the equivalent refractive index change schematic diagram of LHM in the embodiment of the present invention 1.In figure 6, abscissa is frequency
Rate/GHz, ordinate is the value of equivalent refractive index；Solid-line curve is the real part of equivalent refractive index, and imaginary curve is equivalent refractive index
Imaginary part.
Fig. 7 is that the umbrella special-shaped ring to wave structure for the spacing of circular arc line and wave structure in the embodiment of the present invention 1 reflects
Coefficient affect schematic diagram.In the figure 7, abscissa is frequency/GHz, and ordinate is S11Amplitude.
Fig. 8 is the shadow of the umbrella special-shaped ring reflectance factor to wave structure for the width of the embodiment of the present invention 1 Wave structure
Ring schematic diagram.In fig. 8, abscissa is frequency/GHz, and ordinate is S11Amplitude.
Fig. 9 is that the impact of the umbrella-shaped structure reflectance factor on wave structure for the radius of circular arc line in the embodiment of the present invention 1 is shown
It is intended to.In fig. 8, abscissa is frequency/GHz, and ordinate is S11Amplitude.
Detailed description of the invention
The present invention is the umbrella special-shaped ring one side LHM based on wave structure, and the construction unit of this material is covered by one side
Being made up of the high performance microwave medium substrate of metal good conductor, metal good conductor layer is etched with the umbrella special-shaped ring of wave structure.
The span of the dielectric constant of high performance microwave medium substrate is 2～8, is shaped as square, and the span of length of side l is 7
～14mm, the span of thickness h is 0.5～1mm.Metal good conductor layer is layers of copper, and applied thickness is 0.01～0.03mm.Ripple
The top of the umbrella special-shaped ring of wave structure is a circular arc line, with medium substrate center as the center of circle, draws with 3.7～4.3mm for radius r
The semi arch going out, the width of circular arc line is w2, w2Span be 0.2～0.4mm, circular arc line top distance dielectric-slab edge
l1Span be 0.4～0.7mm；Middle part is one section of wave structure vertical with umbrella central symmetry axes, wave structure
Overall length be equal to the width sum of diameter and circular arc line of circular arc line, have micro gap g with top circular arc, the value model of g
Enclosing is 0.04～0.08mm, and wave structure equally broken line is distributed, and the span of wave number n is 3～6, highly h1's
Span is 2～3mm, and the width of wave structure is w3, w3Span be 0.2～0.4mm；The umbrella of wave structure is different
Being metal bar always in the central symmetry axis of shape ring, the length of straight metal bar is equal with length of side l of microwave-medium substrate, and l takes
Value scope is 7～14mm, width w1Span be 0.2～0.6mm.
Details are as follows for the preferred embodiments of the present invention (in conjunction with accompanying drawing)：
Embodiment 1：Such as Fig. 1, the construction unit of the present embodiment is covered with the high performance microwave medium of metal good conductor by one side
Substrate forms, and metal good conductor layer is etched with the umbrella special-shaped ring of wave structure.The dielectric constant of high performance microwave medium substrate
Being 4.4, being shaped as square, length of side l is 10mm, and thickness h is 0.8mm.Metal good conductor layer is layers of copper, and applied thickness is
0.02mm.The top of the umbrella special-shaped ring of wave structure is a circular arc line, and with medium substrate center as the center of circle, 4.1mm is radius r
The semi arch drawing, the width w of circular arc line2For 0.3mm.Circular arc line top distance dielectric-slab edge l1For 0.6mm；Middle part is one
The section wave structure vertical with umbrella central symmetry axes, the overall length of wave structure is equal to diameter and the circular arc line of circular arc line
Width sum, having micro gap g, g with top circular arc is 0.05mm, wave structure equally broken line be distributed, wave number n is
4, highly h1For 2.43mm, the width w of wave structure3For 0.3mm；In the central symmetry axis of the umbrella special-shaped ring of wave structure
Being metal bar always, the length of straight metal bar is equal with length of side l of microwave-medium substrate, and l is 10mm, width w1For 0.3mm.
According to electromagnetic wave vertical incidence analytical structure unit, such as Fig. 2,3 be the amplitude of this structure S parameter respectively and phase place becomes
Change curve, be the effective dielectric constant of this structure, equivalent permeability and equivalent refractive index change curve respectively such as Fig. 4～6.This knot
Structure ε and μ real part in 6.67～6.92GHz frequency band is negative simultaneously, left hand passband occurs；Have negative at 6.68～7.18GHz
Equivalent refractive index, sees Fig. 7～9, is the reflectance factor S of this structure respectively such as Fig. 7～911With between circular arc line and wave structure
Radius change schematic diagram away from, the width of wave structure and circular arc line.
Claims (7)
1. the umbrella special-shaped ring one side LHM based on wave structure, it is characterised in that be provided with one side and be covered with metal good conductor layer
Medium substrate, metal good conductor layer is etched with the umbrella special-shaped ring of wave structure, the top of the umbrella special-shaped ring of wave structure
Being half circular arc line, middle part is one section of wave structure vertical with umbrella central symmetry axis, and the overall length of wave structure is equal to
The diameter of circular arc line and the width sum of circular arc line, wave structure and top circular arc line have micro gap, wave structure and top
Circular arc line constitutes a special-shaped ring；It is metal bar always in the central symmetry axis of the umbrella special-shaped ring of wave structure, from dome
Portion passes perpendicularly through wave structure to bottom, forms its shank, and semicircle camber line and wave structure are coupled together by metal bar.
2. the umbrella special-shaped ring one side LHM based on wave structure as claimed in claim 1, it is characterised in that described medium
Substrate uses microwave-medium substrate.
3. the umbrella special-shaped ring one side LHM based on wave structure as claimed in claim 1, it is characterised in that described medium
The dielectric constant of substrate is 2～8, is shaped as square, and the square length of side is 7～14mm, and thickness is 0.5～1mm, described metal
The thickness of good conductor layer is 0.01～0.03mm.
4. the umbrella special-shaped ring one side LHM based on wave structure as claimed in claim 1, it is characterised in that described circular arc
The distance at the edge of line top and medium substrate is 0.4～0.7mm, circular arc line with medium substrate center as the center of circle, with 3.7～
4.3mm is the semi arch that radius draws；The width of described circular arc line is 0.2～0.4mm.
5. the umbrella special-shaped ring one side LHM based on wave structure as claimed in claim 1, it is characterised in that described wave
Structure equally broken line is distributed, and wave number is 3～6, and wave width is 0.2～0.4mm, and height is 2～3mm.
6. the umbrella special-shaped ring one side LHM based on wave structure as claimed in claim 1, it is characterised in that described straight gold
The length belonging to rod is equal with the length of side of medium substrate, is 7～14mm, and width is 0.2～0.6mm.
7. the umbrella special-shaped ring one side LHM based on wave structure as claimed in claim 1, it is characterised in that described wave
In the umbrella special-shaped ring structure of structure, circular arc line and the spacing of wave structure are 0.04～0.08mm.
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| CN201610896304.XA CN106450783B (en) | 2016-10-14 | 2016-10-14 | Umbrella special-shaped ring single side left-handed material based on wave structure |
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| CN201610896304.XA CN106450783B (en) | 2016-10-14 | 2016-10-14 | Umbrella special-shaped ring single side left-handed material based on wave structure |
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| CN106450783A true CN106450783A (en) | 2017-02-22 |
| CN106450783B CN106450783B (en) | 2019-05-28 |
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Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102480029A (en) * | 2011-07-26 | 2012-05-30 | 深圳光启高等理工研究院 | Offset-feed type radar antenna |
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2016
- 2016-10-14 CN CN201610896304.XA patent/CN106450783B/en not_active Expired - Fee Related
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102480029A (en) * | 2011-07-26 | 2012-05-30 | 深圳光启高等理工研究院 | Offset-feed type radar antenna |
Non-Patent Citations (2)
| Title |
|---|
| BAIQIANG YOU ET AL: "A Petal-shaped Left-handed Metamaterial Based on Split Ring and Semicircular Resonator", 《2016 PROGRESS IN ELECTROMAGNETIC RESEARCH SYMPOSIUM (PIERS), SHANGHAI, CHINA》 * |
| DALIA NASHAAT ELSHEAKH ET AL: "Ultrawide Bandwidth Umbrella-Shaped Microstrip Monopole Antenna Using Spiral Artificial Magnetic Conductor (SAMC)", 《IEEE ANTENNAS AND WIRELESS PROPAGATION LETTERS》 * |
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