CN102751584B - Minitype manual electromagnetic material based on two layers of substrates and preparation method - Google Patents
Minitype manual electromagnetic material based on two layers of substrates and preparation method Download PDFInfo
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- CN102751584B CN102751584B CN201210192548.1A CN201210192548A CN102751584B CN 102751584 B CN102751584 B CN 102751584B CN 201210192548 A CN201210192548 A CN 201210192548A CN 102751584 B CN102751584 B CN 102751584B
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Abstract
The invention discloses a minitype manual electromagnetic material based on two layers of substrates and a preparation method. The problems that in the existing manual electromagnetic material structure unit at the frequency bands of high frequency (HF), very high frequency (VHF) and ultra high frequency (UHF), the size is overlarge, the frequency is over-high and the electromagnetic material structure cannot be taken into practical application can be mainly solved. The realization steps are as follows: firstly, etching a rectangular folding line or a plane spiral line on two single-side or double-sided printed circuit board (PCB) copper-clad plates; adhering two copper-clad plates to an overall substrate; coating metal layers at two ends of the overall substrate; and respectively connecting the folding line on the substrate with the metal layers which are coated at two ends of the substrate to prepare a structure unit; and then, parallelly arraying and adhering units which have the same structure by using the length of the unit overall substrate as a period in an equal distance to prepare a manual electromagnetic material block. The single negative media property and the negative refractive index property can be realized in the frequency bands of HF, VHF and UHF, and the minitype manual electromagnetic material has the advantages of long height subwave, miniature and low frequency, and can be used for improving the performances of various kinds of communication electronic systems in the frequency bands of HF, VHF and UHF.
Description
Technical field
The invention belongs to electromagnetic material technical field, relate to a kind of electromagnetic material and preparation method thereof, be particularly related to height sub-wavelength miniaturization artificial electromagnetic material of a kind of high frequency HF, very high frequency(VHF) VHF and superfrequency uhf band and preparation method thereof, can be used for constructing the miniaturization artificial electromagnetic material with negative index characteristic of HF, VHF and uhf band, improve the performance of communication system or the equipment of HF, VHF and uhf band.
Background technology
Artificial electromagnetic material (Metamaterials) refers at occurring in nature itself and does not exist or do not find, but people construct according to the calculating of electromagnetic theory, have artificial medium or the material of unconventional electromagnetic attributes, its Typical Representative has single-negative material, left-handed materials and zero refraction materials.
Single-negative material is that effective dielectric constant ε and equivalent permeability μ only have one for negative a kind of novel artificial electromagnetic material, be negative comprising effective dielectric constant, equivalent permeability is positive electric single-negative material and effect dielectric constant for just, and equivalent permeability is two kinds of negative magnetic single-negative materials.Because the wave vector of electromagnetic wave in single-negative material is imaginary number, thereby in single-negative material, only there is the field of withering and falling, electromagnetic wave can not pass through, but can there is complete tunneling effect in electromagnetic wave, therefore can construct the left-handed materials of better performances by combination negative dielectric constant material and negative equivalent permeability material in the double-decker of negative dielectric constant material and negative equivalent permeability material composition.
Left-handed materials is that effective dielectric constant ε and equivalent permeability μ are negative a kind of novel artificial electromagnetic material simultaneously, there is the characteristics such as negative index, evanescent wave amplification, reversed Doppler effect, reversal cerenkov radiation, these unique character make it have very large application potential, can realize dull and stereotyped focusing, antenna beam converges, perfect lens, ultra-thin resonant cavity, the functions such as backward wave antenna.
In recent years, the development of artificial electromagnetic material is very rapid, be especially widely used in microwave section and optical region, but artificial electromagnetic material has but run into huge obstruction in the application of HF, VHF and uhf band at present.Nowadays the equipment of HF, VHF and uhf band has related to the every field of people's life, as remote satellite communication, magnetic resonance imaging MRI, magnetic resonance wireless energy transfer, shortwave and ultrashort wave communication, and the common everyday devices such as broadcast receiver and television set, if artificial electromagnetic material can be applied in theory to these equipment, its performance will be greatly improved.The operating frequency of above-mentioned these application is at 3MHz to 1000MHz, the cellular construction size of the artificial electromagnetic material that people propose is at present generally in λ/10, wherein λ refers to its operation wavelength, it is 100m to 0.3m that the frequency of above-mentioned 3MHz to 1000MHz is scaled wavelength, if according to the artificial electromagnetic material unit of conventional design, its cellular construction size is about 10m to 0.03m, size is too large, cannot drop into practical application, so design HF, VHF and uhf band and size height sub-wavelength miniaturization artificial electromagnetic material below λ/100 has larger application prospect.
Summary of the invention
The object of the invention is to the deficiency for above-mentioned prior art, a kind of miniaturization artificial electromagnetic material and preparation method based on two-layer substrate is provided, make cellular construction size reduction below λ/100, to meet the height sub-wavelength application request of HF, VHF and uhf band.
For achieving the above object, the present invention provides following three kinds of technical schemes:
Technical scheme 1
Miniaturization artificial electromagnetic material based on two-layer substrate, comprises N construction unit, N >=2, and each construction unit is provided with two medium substrate layers, it is characterized in that, a facet etch rectangle broken line of first medium substrate layer, another side is light face, i.e. insulation board; One facet etch snail line of second medium substrate layer, this spiral center is connected with circular metal paster, another side etching rectangle broken line; The light face of first medium substrate layer and the helicoid of second medium substrate layer are bonded as one, form the monolith substrate of broken line-helix-broken line structure, the two ends of this monolith substrate scribble metal level, and metal level is connected with the broken line on broken line and second medium substrate layer on first medium substrate layer respectively.
Miniaturization artificial electromagnetic material preparation method based on two-layer substrate, comprises the steps:
(1) selecting thickness is 0.1mm～1mm, DIELECTRIC CONSTANT ε
r=2.6 ± 0.05, the polytetrafluoroethylene one side PCB copper-clad plate of losstangenttanδ=0.015, covers copper foil surface etching rectangle broken line at it, and obtaining one side is that broken line face another side is the first medium substrate layer of light face; The long L of rectangle broken line
m=0.99L, wide H
m=0.99H, the horizontal line live width L of rectangle broken line
wm=1.15 × 10
-2l, the vertical line live width L of rectangle broken line
wm=7.7 × 10
-3l, distance between centers of tracks S
wm=7.7 × 10
-3l, wherein L and H are respectively the length of copper-clad plate and wide;
(2) selecting thickness is 0.1mm～1mm, DIELECTRIC CONSTANT ε
r=2.6 ± 0.05, the two-sided PCB copper-clad plate of polytetrafluoroethylene of losstangenttanδ=0.015, cover copper foil surface etching snail line at one, cover copper foil surface etching rectangle broken line at another, make simultaneously for helicoid another side is the second medium substrate layer of broken line face; The outline length L of snail line
p=0.92L, outline width H
p=0.92H, number of turn n=13, live width L
wp=8.1 × 10
-3l, distance between centers of tracks is S
wp=1.23 × 10
-2l, the radius r of spiral center connected circular metal paster is 0.5mm～5mm; The long L of rectangle broken line
m=0.99L, wide H
m=0.99H, the horizontal line live width L of rectangle broken line
wm=1.15 × 10
-2l, the vertical line live width L of rectangle broken line
wm=7.7 × 10
-3l, distance between centers of tracks S
wm=7.7 × 10
-3l, wherein L, H are respectively the length of copper-clad plate and wide;
(3) helicoid of the light face of first medium substrate layer and second medium substrate layer is fitted tightly, be bonded as one through adhesive material hot-pressing processing, form the monolith substrate of broken line-helix-broken line structure;
(4) be coated with the thick metal level of 10 μ m ~ 1mm at the two ends of monolith substrate, then the metal level at two ends is connected with the broken line on this monolith substrate two sides respectively, make artificial electromagnetic material construction unit;
(5) repeating step (1)～(4), obtain N construction unit, and N >=2 are carried out parallel equidistant arrangement by all construction units taking the length of whole unit substrate as the cycle, bonding by adhesive material hot-pressing processing, make artificial electromagnetic material bulk.
Technical scheme 2
Miniaturization artificial electromagnetic material based on two-layer substrate, comprises N construction unit, N >=2, and each construction unit is provided with two medium substrate layers, it is characterized in that, a facet etch rectangle broken line of first medium substrate layer, another side is light face, i.e. insulation board; One facet etch rectangle broken line of second medium substrate layer, another side etching snail line, this spiral center is connected with circular metal paster; The light face of first medium substrate layer and the broken line face of second medium substrate layer are bonded as one, form the monolith substrate of a broken line-broken line-helix structure, the two ends of this monolith substrate scribble metal level, and this metal level is connected with the rectangle broken line on rectangle broken line and second medium substrate layer on first medium substrate layer respectively.
Miniaturization artificial electromagnetic material preparation method based on two-layer substrate, comprises the steps:
1) selecting thickness is 0.1mm～1mm, DIELECTRIC CONSTANT ε
r=2.6 ± 0.05, the polytetrafluoroethylene one side PCB copper-clad plate of losstangenttanδ=0.015, covers copper foil surface etching rectangle broken line at it, and making one side is that broken line face another side is the first medium substrate layer of light face; The long L of rectangle broken line
m=0.99L, wide H
m=0.99H; The horizontal line live width L of rectangle broken line
wm=1.15 × 10
-2l, the vertical line live width L of rectangle broken line
wm=7.7 × 10
-3l, distance between centers of tracks S
wm=7.7 × 10
-3l, wherein L, H are respectively the length of copper-clad plate and wide;
2) selecting thickness is 0.1mm～1mm, DIELECTRIC CONSTANT ε
r=2.6 ± 0.05, the two-sided PCB copper-clad plate of polytetrafluoroethylene of losstangenttanδ=0.015, cover copper foil surface etching rectangle broken line at one, cover copper foil surface etching snail line at another, make the second medium substrate layer that one side is helicoid for broken line face another side; The long L of rectangle broken line
m=0.99L, wide H
m=0.99H, the horizontal line live width L of rectangle broken line
wm=1.15 × 10
-2l, the vertical line live width L of rectangle broken line
wm=7.7 × 10
-3l, distance between centers of tracks S
wm=7.7 × 10
-3l; The outline length L of snail line
p=0.92L, outline width H
p=0.92H, number of turn n=13, live width L
wp=8.1 × 10
-3l, distance between centers of tracks is S
wp=1.23 × 10
-2l, the radius r of spiral center connected circular metal paster is 0.5mm～5mm, wherein L, H are respectively the length of copper-clad plate and wide;
3) the broken line face of the light face of first medium substrate layer and second medium substrate layer is fitted tightly, be bonded as one through adhesive material hot-pressing processing, form the monolith substrate of broken line-broken line-helix structure;
4) be coated with the thick metal level of 10 μ m ~ 1mm at the two ends of monolith substrate, then the metal level at two ends is connected with the broken line on this monolith substrate two sides respectively, make artificial electromagnetic material construction unit;
5) repeating step 1)～4), obtaining N construction unit, N >=2, carry out parallel equidistant arrangement by all construction units taking the length of whole unit substrate as the cycle, bonding by adhesive material hot-pressing processing, make artificial electromagnetic material bulk.
Technical scheme 3
Miniaturization artificial electromagnetic material based on two-layer substrate, comprise N construction unit, N >=2, each construction unit is provided with two medium substrate layers, it is characterized in that, a facet etch snail line of first medium substrate layer, this spiral center is connected with circular metal paster, another side is light face, i.e. insulation board; One facet etch rectangle broken line of second medium substrate layer, another side etching snail line, this spiral center is connected with circular metal paster; The light face of first medium substrate layer and the broken line face of second medium substrate layer are bonded as one, form the monolith substrate of a helix broken line helix structure, the two ends of this monolith substrate scribble metal level, and metal level is connected with the rectangle broken line on second medium substrate layer.
Miniaturization artificial electromagnetic material preparation method based on two-layer substrate, comprises the steps
(A) selecting thickness is 0.1mm～1mm, DIELECTRIC CONSTANT ε
r=2.6 ± 0.05, the polytetrafluoroethylene one side PCB copper-clad plate of losstangenttanδ=0.015, covers copper foil surface etching snail line at it, makes simultaneously for helicoid another side is the first medium substrate layer of light face; The outline length L of snail line
p=0.92L, outline width H
p=0.92H, number of turn n=13, live width L
wp=8.1 × 10
-3l, distance between centers of tracks is S
wp=1.23 × 10
-2l, the radius r of spiral center connected circular metal paster is 0.5mm～5mm, wherein L, H are respectively the length of copper-clad plate and wide; (B) selecting thickness is 0.1mm～1mm, DIELECTRIC CONSTANT ε
r=2.6 ± 0.05, the two-sided PCB copper-clad plate of polytetrafluoroethylene of losstangenttanδ=0.015, cover copper foil surface etching rectangle broken line at one, cover copper foil surface etching snail line at another, make the second medium substrate layer that one side is helicoid for broken line face another side; The long L of rectangle broken line
m=0.99L, wide H
m=0.99H, the horizontal line live width L of rectangle broken line
wm=1.15 × 10
-2l, the vertical line live width L of rectangle broken line
wm=7.7 × 10
-3l, distance between centers of tracks S
wm=7.7 × 10
-3l; The outline length L of snail line
p=0.92L, outline width H
p=0.92H, number of turn n=13, live width L
wp=8.1 × 10
-3l, distance between centers of tracks is S
wp=1.23 × 10
-2l, the radius r of spiral center connected circular metal paster is 0.5mm～5mm, wherein L, H are respectively the length of copper-clad plate and wide;
(C) the broken line face of the light face of first medium substrate layer and second medium substrate layer is fitted tightly, be bonded as one through adhesive material hot-pressing processing, form the monolith substrate of helix-broken line-helix structure;
(D) be coated with the thick metal level of 10 μ m ~ 1mm at the two ends of monolith substrate, then the metal level at two ends is connected with the broken line on this monolith substrate, make artificial electromagnetic material construction unit;
(E) repeating step (A)～(D), obtain N construction unit, N >=2, carry out parallel equidistant arrangement by all construction units taking the length of whole unit substrate as the cycle, bonding by adhesive material hot-pressing processing, make artificial electromagnetic material bulk.
Tool of the present invention has the following advantages:
The present invention is covered copper foil surface etching rectangle broken line or snail line respectively owing to using in three differences of two-layer substrate, can form broken line-helix-broken line structure, broken line-broken line-helix structure, the different monolith substrate structure of helix-broken line-helix; Simultaneously due to the two ends matel coated layer at monolith substrate, and be connected with the rectangle broken line in monolith substrate, Component units structure, has realized the negative index characteristic in the special frequency channel of HF, VHF and uhf band; In addition due to the metal level at two ends is connected with the broken line of monolith substrate respectively, construction unit physical dimension is reduced to below λ/100, overcome Traditional Man electromagnetic material excessive at HF, VHF and uhf band cell size, cannot drop into the restriction of practical application, wherein λ is operation wavelength.
Brief description of the drawings:
Fig. 1 is the cellular construction schematic diagram of first embodiment of the invention;
Fig. 2 is the making flow chart of first embodiment of the invention;
Fig. 3 is the cellular construction schematic diagram of second embodiment of the invention;
Fig. 4 is the making flow chart of second embodiment of the invention;
Fig. 5 is the cellular construction schematic diagram of third embodiment of the invention;
Fig. 6 is the making flow chart of third embodiment of the invention;
Fig. 7 is rectangle broken line schematic diagram of the present invention;
Fig. 8 is snail line schematic diagram of the present invention;
Fig. 9 is the effective dielectric constant performance plot of second embodiment of the invention;
Figure 10 is the equivalent permeability performance plot of second embodiment of the invention;
Figure 11 is the effective medium refractive index characteristic figure of second embodiment of the invention.
Specific implementation
Embodiment 1
With reference to Fig. 1, the construction unit that the present invention is based on the miniaturization artificial electromagnetic material of two-layer substrate comprises two medium substrate layers, a wherein facet etch broken line of first medium substrate layer 1, and another side is light face, i.e. insulation board; One facet etch snail line of second medium substrate layer 2, this helix center is connected with circular metal paster 4, another side etching rectangle broken line; The light face of first medium substrate layer 1 and the helicoid of second medium substrate layer 2 are bonded as one, form the monolith substrate of broken line-helix-broken line structure, the two ends of this monolith substrate scribble metal level 3, the metal level 3 that monolith substrate one end is coated with is connected with the bottom of the rectangle broken line on first medium substrate layer 1, and the metal level 3 that the monolith substrate other end is coated with is connected with the top of the rectangle broken line on second medium substrate layer 2; By N unit, N >=2, carry out parallel equidistant and arrange bondingly taking the length of whole unit substrate as the cycle, obtain artificial electromagnetic material bulk.
With reference to Fig. 2, the method for construction drawing 1 structural material of the present invention, carry out as follows:
Step 1, selecting thickness is 0.2mm, DIELECTRIC CONSTANT ε
r=2.6 ± 0.05, the polytetrafluoroethylene one side PCB copper-clad plate of losstangenttanδ=0.015, covers copper foil surface etching rectangle broken line as shown in Figure 7 at it, and making one side is that broken line face another side is the first medium substrate layer of light face; The long L of rectangle broken line
m=0.99L, wide H
m=0.99H, the horizontal line live width L of rectangle broken line
wm=1.15 × 10
-2l, the vertical line live width L of rectangle broken line
wm=7.7 × 10
-3l, distance between centers of tracks S
wm=7.7 × 10
-3l, wherein L, H are respectively the length of copper-clad plate and wide, and concrete numerical value is chosen according to actual needs, and this example is got L=H=20mm.
Step 2, selecting thickness is 0.2mm, DIELECTRIC CONSTANT ε
r=2.6 ± 0.05, the two-sided PCB copper-clad plate of polytetrafluoroethylene of losstangenttanδ=0.015, cover copper foil surface etching snail line as shown in Figure 8 at one, cover copper foil surface etching rectangle broken line as shown in Figure 7 at another, make simultaneously for helicoid another side is the second medium substrate layer of broken line face; The outline length L of snail line
p=0.92L, outline width H
p=0.92H, number of turn n=13, live width L
wp=8.1 × 10
-3l, distance between centers of tracks is S
wp=1.23 × 10
-2l, the radius r=0.5mm of spiral center connected circular metal paster; The long L of rectangle broken line
m=0.99L, wide H
m=0.99H, the horizontal line live width L of rectangle broken line
wm=1.15 × 10
-2l, the vertical line live width L of rectangle broken line
wm=7.7 × 10
-3l, distance between centers of tracks S
wm=7.7 × 10
-3l, wherein L, H are respectively the length of copper-clad plate and wide, and concrete numerical value is chosen according to actual needs, and this example is got L=H=20mm.
Step 3, fits tightly the helicoid of the light face of first medium substrate layer and second medium substrate layer, through adhesive material hot-pressing processing, it is bonded as one, and forms the monolith substrate of broken line-helix-broken line structure.
Step 4, be coated with the thick metal level of 10 μ m at the two ends of monolith substrate, the metal level that monolith substrate one end is coated with is connected with the bottom of rectangle broken line on first medium substrate, the metal level that the monolith substrate other end is coated with is connected with the top of rectangle broken line on second medium substrate, makes artificial electromagnetic material construction unit.
Step 5, repeating step 1～step 4, obtains N construction unit, N >=2, carry out parallel equidistant arrangement by all construction units taking the length of whole unit substrate as the cycle, and by adhesive material hot pressing, these construction units are carried out bonding, make artificial electromagnetic material bulk.
Embodiment 2
With reference to Fig. 3, the construction unit that the present invention is based on the miniaturization artificial electromagnetic material of two-layer substrate comprises two medium substrate layers, a wherein facet etch rectangle broken line of first medium substrate layer 1, and another side is light face, i.e. insulation board; One facet etch rectangle broken line of second medium substrate layer 2, another side etching snail line, this helix center is connected with circular metal paster 4; The light face of first medium substrate layer 1 and the broken line face of second medium substrate layer 2 are bonded as one, form the monolith substrate of a broken line-broken line-helix structure, the two ends of this monolith substrate scribble metal level 3, the metal level 3 that monolith substrate one end is coated with is connected with the bottom of rectangle broken line on first medium substrate layer 1, and the metal level 3 that the monolith substrate other end is coated with is connected with the top of rectangle broken line on second medium substrate layer 2; By N unit, N >=2, carry out parallel equidistant and arrange bondingly taking the length of whole unit substrate as the cycle, obtain artificial electromagnetic material bulk.
With reference to Fig. 4, the method for construction drawing 3 structural materials of the present invention, carry out as follows:
Step (1), selecting thickness is 0.1mm, DIELECTRIC CONSTANT ε
r=2.6 ± 0.05, the polytetrafluoroethylene one side PCB copper-clad plate of losstangenttanδ=0.015, covers copper foil surface etching rectangle broken line as shown in Figure 7 at it, and making one side is that broken line face another side is the first medium substrate layer of light face; The long L of rectangle broken line
m=0.99L, wide H
m=0.99H, the horizontal line live width L of rectangle broken line
wm=1.15 × 10
-2l, the vertical line live width L of rectangle broken line
wm=7.7 × 10
-3l, distance between centers of tracks S
wm=7.7 × 10
-3l, wherein L, H are respectively length and the width of copper-clad plate, and concrete numerical value is chosen according to actual needs, and this example is got L=H=26mm.
Step (2), selecting thickness is 0.1mm, DIELECTRIC CONSTANT ε
r=2.6 ± 0.05, the two-sided PCB copper-clad plate of polytetrafluoroethylene of losstangenttanδ=0.015, cover copper foil surface etching rectangle broken line as shown in Figure 7 at one, cover copper foil surface etching snail line as shown in Figure 8 at another, make the second medium substrate layer that one side is helicoid for broken line face another side; The long L of rectangle broken line
m=0.99L, wide H
m=0.99H, the horizontal line live width L of rectangle broken line
wm=1.15 × 10
-2l, the vertical line live width L of rectangle broken line
wm=7.7 × 10
-3l, distance between centers of tracks S
wm=7.7 × 10
-3l; The outline length L of snail line
p=0.92L, outline width H
p=0.92H, number of turn n=13, live width L
wp=8.1 × 10
-3l, distance between centers of tracks is S
wp=1.23 × 10
-2l, the radius r=1mm of spiral center connected circular metal paster, wherein L, H are respectively length and the width of copper-clad plate, and concrete numerical value is chosen according to actual needs, and this example is got L=H=26mm.
Step (3), fits tightly the broken line face of the light face of first medium substrate layer and second medium substrate layer, through adhesive material hot-pressing processing, it is bonded as one, and forms the monolith substrate of broken line-broken line-helix structure.
Step (4), be coated with the thick metal level of 17 μ m at the two ends of monolith substrate, the metal level that monolith substrate one end is coated with is connected with the bottom of the rectangle broken line on first medium substrate, the metal level that the monolith substrate other end is coated with is connected with the top of the rectangle broken line on second medium substrate, makes artificial electromagnetic material construction unit.
Step (5), repeating step (1)～step (4), obtain N construction unit, N >=2, all construction units are carried out to parallel equidistant arrangement taking the length of whole unit substrate as the cycle, and by adhesive material hot pressing, these construction units are carried out bonding, make artificial electromagnetic material bulk.
Embodiment 3
With reference to Fig. 5, the construction unit that the present invention is based on the miniaturization artificial electromagnetic material of two-layer substrate comprises two medium substrate layers, a wherein facet etch helix of first medium substrate layer 1, and this helix center is connected with circular metal paster 4, another side is light face, i.e. insulation board; One facet etch rectangle broken line of second medium substrate layer 2, another side etching helix, helix center is connected with circular metal paster 4, the symmetrical placement of helix on this helix and first medium substrate layer; The light face of first medium substrate layer 1 and the broken line face of second medium substrate layer 2 are bonded as one, form the monolith substrate of a helix-broken line-helix structure, the two ends of this monolith substrate scribble metal level 3, and the metal level 3 that monolith substrate two ends are coated with is connected with bottom and the top of the rectangle broken line on second medium substrate layer 2 respectively; By N unit, N >=2, carry out parallel equidistant and arrange bondingly taking the length of whole unit substrate as the cycle, obtain artificial electromagnetic material bulk.
With reference to Fig. 6, the method for construction drawing 5 structural materials of the present invention, carry out as follows:
Steps A, selecting thickness is 1mm, DIELECTRIC CONSTANT ε
r=2.6 ± 0.05, the polytetrafluoroethylene one side PCB copper-clad plate of losstangenttanδ=0.015, covers copper foil surface at it and loses snail line as shown in Figure 8, makes simultaneously for helicoid another side is the first medium substrate layer of light face; The outline length of side L of snail line
p=0.92L, outline width H
p=0.92H, number of turn n=13, live width L
wp=8.1 × 10
-3l, distance between centers of tracks is S
wp=1.23 × 10
-2l, the radius r=5mm of spiral center connected circular metal paster, wherein L, H are respectively length and the width of copper-clad plate, and concrete numerical value is chosen according to actual needs, and this example is got L=H=40mm.
Step B, selecting thickness is 1mm, DIELECTRIC CONSTANT ε
r=2.6 ± 0.05, the two-sided PCB copper-clad plate of polytetrafluoroethylene of losstangenttanδ=0.015, cover copper foil surface etching rectangle broken line as shown in Figure 7 at one, cover copper foil surface etching snail line as shown in Figure 8 at another, the symmetrical placement of helix on this helix and first medium substrate layer, makes the second medium substrate layer that one side is helicoid for broken line face another side; The long L of rectangle broken line
m=0.99L, wide H
m=0.99H, the horizontal line live width L of rectangle broken line
wm=1.15 × 10
-2l, the vertical line live width L of rectangle broken line
wm=7.7 × 10
-3l, distance between centers of tracks S
wm=7.7 × 10
-3l; The outline length of side L of snail line
p=0.92L, outline width H
p=0.92H, live width L
wp=8.1 × 10
-3l, distance between centers of tracks is S
wp=1.23 × 10
-2l, the radius r=5mm of spiral center connected circular metal paster, wherein L, H are respectively length and the width of copper-clad plate, and concrete numerical value is chosen according to actual needs, and this example is got L=H=40mm.
Step C, fits tightly the broken line face of the light face of first medium substrate layer and second medium substrate layer, through adhesive material hot-pressing processing, it is bonded as one, and forms the monolith substrate of helix broken line helix structure.
Step D, is coated with the thick metal level of 1mm at the two ends of monolith substrate, and the metal level that monolith substrate two ends are coated with is connected with bottom and the top of rectangle broken line on second medium substrate respectively, makes artificial electromagnetic material construction unit.
Step e, repeating step A～step D, obtains N construction unit, N >=2, carry out parallel equidistant arrangement by all construction units taking the length of whole unit substrate as the cycle, and by adhesive material hot pressing, these construction units are carried out bonding, make artificial electromagnetic material bulk.
Implementation result of the present invention can be calculated and be further illustrated by Computerized Numerical Simulation:
In order to obtain strict correct numerical result and the Electromagnetic Simulation result accurately of trying one's best, thereby further prove the feasibility of the miniaturization artificial electromagnetic material structure based on two-layer substrate, the present invention has used the electromagnetic-field simulation business software HFSS based on Finite Element Method to carry out numerical value full-wave simulation to the part material that will construct, and research draws wherein a kind of characteristic of effective dielectric constant, magnetic permeability and refractive index of scheme.
Material for the structure of embodiment 2 carries out concrete Computer Simulation, and Fig. 9 provides the characteristic of its effective dielectric constant, and Figure 10 provides the characteristic of its equivalent permeability, and Figure 11 provides the characteristic of its effective medium refractive index.
As can be seen from Figure 9, at 25MHz, within the scope of 113.5MHz, it is negative characteristic that the present invention can realize dielectric constant.
As can be seen from Figure 10, at 27.5MHz, within the scope of 35MHz, it is negative characteristic that the present invention can realize magnetic permeability.
As can be seen from Figure 11, at 27.5MHz, within the scope of 35MHz, it is negative characteristic that the present invention can realize refractive index.
Claims (3)
1. the miniaturization artificial electromagnetic material preparation method based on two-layer substrate, comprises the steps:
(1) selecting thickness is 0.1mm～1mm, DIELECTRIC CONSTANT ε
r=2.6 ± 0.05, the polytetrafluoroethylene one side PCB copper-clad plate of losstangenttanδ=0.015, covers copper foil surface etching rectangle broken line at it, and obtaining one side is that broken line face another side is the first medium substrate layer of light face; The long L of rectangle broken line
m=0.99L, wide H
m=0.99H, the horizontal line live width L of rectangle broken line
wm=1.15 × 10
-2l, the vertical line live width L of rectangle broken line
wm=7.7 × 10
-3l, distance between centers of tracks S
wm=7.7 × 10
-3l, wherein L and H are respectively the length of copper-clad plate and wide;
(2) selecting thickness is 0.1mm～1mm, DIELECTRIC CONSTANT ε
r=2.6 ± 0.05, the two-sided PCB copper-clad plate of polytetrafluoroethylene of losstangenttanδ=0.015, cover copper foil surface etching snail line at one, cover copper foil surface etching rectangle broken line at another, make simultaneously for helicoid another side is the second medium substrate layer of broken line face; The outline length L of snail line
p=0.92L, outline width H
p=0.92H, number of turn n=13, live width L
wp=8.1 × 10
-3l, distance between centers of tracks is S
wp=1.23 × 10
-2l, the radius r of spiral center connected circular metal paster is 0.5mm～5mm; The long L of rectangle broken line
m=0.99L, wide H
m=0.99H, the horizontal line live width L of rectangle broken line
wm=1.15 × 10
-2l, the vertical line live width L of rectangle broken line
wm=7.7 × 10
-3l, distance between centers of tracks S
wm=7.7 × 10
-3l, wherein L, H are respectively the length of copper-clad plate and wide;
(3) helicoid of the light face of first medium substrate layer and second medium substrate layer is fitted tightly, be bonded as one through adhesive material hot-pressing processing, form the monolith substrate of broken line-helix-broken line structure;
(4) be coated with the thick metal level of 10 μ m～1mm at the two ends of monolith substrate, then the metal level at two ends is connected with the broken line on this monolith substrate two sides respectively, make artificial electromagnetic material construction unit;
(5) repeating step (1)～(4), obtain N construction unit, and N >=2 are carried out parallel equidistant arrangement by all construction units taking the length of whole unit substrate as the cycle, bonding by adhesive material hot-pressing processing, make artificial electromagnetic material bulk.
2. the miniaturization artificial electromagnetic material preparation method based on two-layer substrate, comprises the steps:
1) selecting thickness is 0.1mm～1mm, DIELECTRIC CONSTANT ε
r=2.6 ± 0.05, the polytetrafluoroethylene one side PCB copper-clad plate of losstangenttanδ=0.015, covers copper foil surface etching rectangle broken line at it, and making one side is that broken line face another side is the first medium substrate layer of light face; The long L of rectangle broken line
m=0.99L, wide H
m=0.99H; The horizontal line live width L of rectangle broken line
wm=1.15 × 10
-2l, the vertical line live width L of rectangle broken line
wm=7.7 × 10
-3l, distance between centers of tracks S
wm=7.7 × 10
-3l, wherein L, H are respectively the length of copper-clad plate and wide;
2) selecting thickness is 0.1mm～1mm, DIELECTRIC CONSTANT ε
r=2.6 ± 0.05, the two-sided PCB copper-clad plate of polytetrafluoroethylene of losstangenttanδ=0.015, cover copper foil surface etching rectangle broken line at one, cover copper foil surface etching snail line at another, make the second medium substrate layer that one side is helicoid for broken line face another side; The long L of rectangle broken line
m=0.99L, wide H
m=0.99H, the horizontal line live width L of rectangle broken line
wm=1.15 × 10
-2l, the vertical line live width L of rectangle broken line
wm=7.7 × 10
-3l, distance between centers of tracks S
wm=7.7 × 10
-3l; The outline length L of snail line
p=0.92L, outline width H
p=0.92H, number of turn n=13, live width L
wp=8.1 × 10
-3l, distance between centers of tracks is S
wp=1.23 × 10
-2l, the radius r of spiral center connected circular metal paster is 0.5mm～5mm, wherein L, H are respectively the length of copper-clad plate and wide;
3) the broken line face of the light face of first medium substrate layer and second medium substrate layer is fitted tightly, be bonded as one through adhesive material hot-pressing processing, form the monolith substrate of broken line-broken line-helix structure;
4) be coated with the thick metal level of 10 μ m～1mm at the two ends of monolith substrate, then the metal level at two ends is connected with the broken line on this monolith substrate two sides respectively, make artificial electromagnetic material construction unit;
5) repeating step 1)～4), obtaining N construction unit, N >=2, carry out parallel equidistant arrangement by all construction units taking the length of whole unit substrate as the cycle, bonding by adhesive material hot-pressing processing, make artificial electromagnetic material bulk.
3. the miniaturization artificial electromagnetic material preparation method based on two-layer substrate, comprises the steps
(A) selecting thickness is 0.1mm～1mm, DIELECTRIC CONSTANT ε
r=2.6 ± 0.05, the polytetrafluoroethylene one side PCB copper-clad plate of losstangenttanδ=0.015, covers copper foil surface etching snail line at it, makes simultaneously for helicoid another side is the first medium substrate layer of light face; The outline length L of snail line
p=0.92L, outline width H
p=0.92H, number of turn n=13, live width L
wp=8.1 × 10
-3l, distance between centers of tracks is S
wp=1.23 × 10
-2l, the radius r of spiral center connected circular metal paster is 0.5mm～5mm, wherein L, H are respectively the length of copper-clad plate and wide;
(B) selecting thickness is 0.1mm～1mm, DIELECTRIC CONSTANT ε
r=2.6 ± 0.05, the two-sided PCB copper-clad plate of polytetrafluoroethylene of losstangenttanδ=0.015, cover copper foil surface etching rectangle broken line at one, cover copper foil surface etching snail line at another, make the second medium substrate layer that one side is helicoid for broken line face another side; The long L of rectangle broken line
m=0.99L, wide H
m=0.99H, the horizontal line live width L of rectangle broken line
wm=1.15 × 10
-2l, the vertical line live width L of rectangle broken line
wm=7.7 × 10
-3l, distance between centers of tracks S
wm=7.7 × 10
-3l; The outline length L of snail line
p=0.92L, outline width H
p=0.92H, number of turn n=13, live width L
wp=8.1 × 10
-3l, distance between centers of tracks is S
wp=1.23 × 10
-2l, the radius r of spiral center connected circular metal paster is 0.5mm～5mm, wherein L, H are respectively the length of copper-clad plate and wide;
(C) the broken line face of the light face of first medium substrate layer and second medium substrate layer is fitted tightly, be bonded as one through adhesive material hot-pressing processing, form the monolith substrate of helix-broken line-helix structure;
(D) be coated with the thick metal level of 10 μ m～1mm at the two ends of monolith substrate, then the metal level at two ends is connected with the broken line on this monolith substrate, make artificial electromagnetic material construction unit;
(E) repeating step (A)～(D), obtain N construction unit, N >=2, carry out parallel equidistant arrangement by all construction units taking the length of whole unit substrate as the cycle, bonding by adhesive material hot-pressing processing, make artificial electromagnetic material bulk.
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