CN102769192B - Impedance matching element based on mixed material process - Google Patents
Impedance matching element based on mixed material process Download PDFInfo
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- CN102769192B CN102769192B CN201110111601.6A CN201110111601A CN102769192B CN 102769192 B CN102769192 B CN 102769192B CN 201110111601 A CN201110111601 A CN 201110111601A CN 102769192 B CN102769192 B CN 102769192B
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Abstract
The invention embodiment relates to an impedance matching element based on a mixed material process. The impedance matching element is arranged between a first medium and a second medium and comprises a plurality of functional flake layers. Each functional flake layer comprises a flaky substrate and holes arranged on the substrate. The substrate is divided into a plurality of table cells, and each table cell is provided with holes. The impedance of each functional flake layer of the element is continuously changed in a stacking direction of the functional flake layer. The impedances of the first functional flake layer and the last functional flake layer are respectively the same as those of the first medium and the second medium. The substrate of the impedance matching element based on the mixed material process provided by the invention is provided with a plurality of holes, and an electromagnetic parameter distribution of the substrate is adjusted by controlling the size and the distribution of the holes. An impedance gradient layer is formed by stacking a plurality of substrates. The impedance matching element is arranged between the two media for eliminating the impedance mutation of a medium interface, so as to solve the problem of electromagnetic wave energy loss caused by reflex when an electromagnetic wave passes through the interface of the two media.
Description
Technical field
The present invention relates to electromagnetic communication field, relate in particular to a kind of impedance matching element based on composite material technique.
Background technology
Along with scientific and technical development, electromagnetic wave technology is deep into the various aspects of our life gradually.An electromagnetic important characteristic is that it can be in any medium or true airborne spread.Be transmitted to from transmitting terminal at electromagnetic wave receiving terminal process, the loss of energy directly affects the distance of electromagnetic signal propagation and the quality of signal transmission.
In the time of the same medium of electromagnetic wave process, substantially there is no the loss of energy; And in the time that electromagnetic wave passes through the interface of different medium, can generating unit sub reflector phenomenon.Conventionally the larger reflection of electromagnetic parameter (dielectric constant or magnetic permeability) gap of both sides medium will be larger.Due to the electromagnetic reflection of part, will corresponding loss along the electromagnetic energy of the direction of propagation, have a strong impact on the distance of electromagnetic signal propagation and the quality of signal transmission.
Research impedance matching is exactly in order to reduce the signal reflection problem of electromagnetic wave when through different medium border.But also only limit in circuit about the research of the resistance matching problem in electromagnetic transmission process at present, the resistance matching problem during for spatial does not also have more ripe technology.
Summary of the invention
Embodiment of the present invention technical problem to be solved is, a kind of impedance matching element based on composite material technique is provided, and can reduce the loss of electromagnetic wave energy when through different medium border.
For solving the problems of the technologies described above, a kind of impedance matching element based on composite material technique is provided, be arranged between first medium and second medium, described element is made up of multiple function lamellas, each function lamella comprises plate shape substrates and is arranged at the hole on described substrate, described substrate is divided into multiple cells, in each described cell, all offer porose, the impedance of the each function lamella of described element changes continuously along described function lamella stacking direction, and the impedance of the first function lamella and end function lamella is same with the impedance phase of first medium and second medium respectively; The volume in all described holes is all identical, in each hole, be all filled with the obturator with substrate different materials, the dielectric constant of the obturator that same substrate is filled is identical, and the dielectric constant of the obturator that different substrate is filled increases continuously or reduces along the stacking direction of function lamella.
Technique scheme at least has following beneficial effect: the impedance matching element based on composite material technique of the present invention, be arranged between first medium and second medium, element is made up of multiple function lamellas, each function lamella comprises plate shape substrates and is arranged at the hole on substrate, substrate is divided into multiple cells, in each cell, all offer porose, the impedance of the each function lamella of element changes continuously along function lamella stacking direction, and the impedance of the first function lamella and end function lamella is same with the impedance phase of first medium and second medium respectively.Thereby impedance matching element of the present invention changes the electromagnetic parameter distribution of substrate by size and the distribution of adjusting hole, and adopts the stacking formation one impedance transition mechanism layer of multiple substrates.This impedance matching element can be eliminated the change in the instantaneous impedance of two dielectric interfaces, and then has solved that reflection occurs electromagnetic wave when through two dielectric interfaces and the problem that causes electromagnetic wave energy loss.
Brief description of the drawings
Fig. 1 is the structural representation of the first embodiment of the impedance matching element based on composite material technique of the present invention.
Fig. 2 is the front view of the impedance matching element based on composite material technique shown in Fig. 1.
Fig. 3 is the A-A cutaway view of the impedance matching element based on composite material technique shown in Fig. 2.
Fig. 4 is the structural representation of the second embodiment of the impedance matching element based on composite material technique of the present invention.
Fig. 5 is the front view of the impedance matching element based on composite material technique shown in Fig. 4.
Fig. 6 is the A-A cutaway view of the impedance matching element based on composite material technique shown in Fig. 5.
Fig. 7 is the structural representation of the 3rd embodiment of the impedance matching element based on composite material technique of the present invention.
Fig. 8 is the structural representation of the 4th embodiment of the impedance matching element based on composite material technique of the present invention.
Embodiment
When electromagnetic wave is in the time that same medium is propagated, substantially there is no the loss of energy; And in the time that electromagnetic wave passes through the interface of different medium, can generating unit sub reflector phenomenon.Conventionally the larger reflection of electromagnetic parameter (dielectric constant or magnetic permeability) gap of both sides medium will be larger.Due to the electromagnetic reflection of part, will corresponding loss along the electromagnetic energy of the direction of propagation, have a strong impact on the distance of electromagnetic signal propagation and the quality of signal transmission.The present invention relates to a kind of impedance matching element, in order to solve electromagnetic wave generating unit sub reflector and cause the problem of electromagnetic wave energy loss during through different medium interface in spatial process.
On the material being evenly distributed at an electromagnetic parameter, by spiling in some region of material, because air dielectric can be inserted these apertures, can cause the electromagnetic parameter changes in distribution of this material regional area.According to above-mentioned principle, analyze the electromagnetic parameter of this material and the interaction relationship of air electromagnetic parameter, the electromagnetic parameter that quantity by control hole and size distribution just can be adjusted material regional area distributes, by that analogy, the electromagnetic parameter requiring according to regional distributes, just can realize material macroscopic view on the whole to electromagnetic different response.Due to the impedance of material with
proportional, so as long as change at least one in dielectric constant and magnetic permeability, just can change the impedance of material.According to above-mentioned principle, material stacks different multi-disc impedance is combined, formed impedance transition mechanism layer and just can eliminate the change in the instantaneous impedance between two media, and then reflex and electromagnetic wave energy loss problem when eliminating electromagnetic wave and passing through different medium interface.
Fig. 1～Fig. 3 is respectively structural representation, front view and the A-A cutaway view of the first embodiment of the impedance matching element based on composite material technique of the present invention.This impedance matching element is arranged between first medium and second medium the reflex when eliminating electromagnetic wave through two dielectric interfaces.Impedance matching element is formed perpendicular to sheet surfaces direction is stacking by parallel function lamella 4 edges of multiple front and rear surfaces, each function lamella 4 comprises the substrate 1 of sheet and is arranged at the hole 3 on substrate 1, each substrate 1 is divided into multiple cells 2, all offers porose 3 each cell 2 is interior.The impedance of the first function lamella 4 and end function lamella 4 is same with the impedance phase of first medium and second medium respectively, and the impedance of middle some function lamellas 4 changes continuously along the stacking direction of substrate 1, forms an impedance transition mechanism layer.The size of cell 2 depends on the electromagnetic frequency of needs responses, conventionally cell 2 be of a size of required response electromagnetic wavelength 1/10th, otherwise being arranged in space of hole 3 can not be regarded as continuously.
The degree of depth in the hole 3 in the present embodiment on each substrate 1 is all identical, and the cross-sectional area in the hole 3 on same substrate 1 is identical, and the cross-sectional area in the hole 3 on different substrate 1 increases continuously along function lamella 4 stacking directions.Hole 3 in the present embodiment is cylindrical, and the multiple holes 3 on same substrate 1 are evenly distributed on base material 1, and being uniformly distributed here refer to, the center of circle of the cross section in arbitrary hole 3 and its around spacing distance between the center of circle of the cross section in several holes 3 equate.Because so effective dielectric constant and the equivalent permeability of the existence unit lattice 3 of cylindrical hole 3 all can change, the volume in the hole 3 in the unit lattice 2 of same substrate 1 equates, so be packed into the air of equivalent in hole 3, the effective dielectric constant of the unit lattice 2 on same function lamella 4 is all identical; The volume in the hole 3 on different substrate 1 is different and increase continuously along the stacking direction of substrate 1, so the impedance matching element of the present embodiment forms an impedance transition mechanism layer along function lamella 4 stacking directions.When concrete enforcement, also can adopt the hole 3 of varying cross-section shape, as: triangle, other polygons such as square and regular pentagon.As long as meet on same substrate 1 porose 3 cross-sectional area equate, the cross-sectional area in the hole 3 on different substrate 1 increases or reduces to form an impedance transition mechanism layer continuously along the stacking direction of function lamella 4, and then eliminates the change in the instantaneous impedance at interface place.
Fig. 4～Fig. 6 is respectively structural representation, front view and the A-A cutaway view of the second embodiment of the impedance matching element based on composite material technique of the present invention.The present embodiment middle impedance matching element is by the parallel function lamella of multiple front and rear surfaces 4 along perpendicular to stacking formation of function lamella 4 surface direction, and each function lamella 4 comprises the substrate 1 of sheet and is arranged at the multiple holes 3 on substrate 1.Each substrate 1 is divided into multiple cells 2, all offers porose 3 each cell 2 is interior.The impedance of the first function lamella 4 and end function lamella 4 is same with the impedance phase of first medium and second medium respectively, and the impedance of middle some function lamellas 4 changes continuously along the stacking direction of function lamella 4, forms an impedance transition mechanism layer.The size of cell 2 depends on the electromagnetic frequency of needs responses, conventionally cell 2 be of a size of required response electromagnetic wavelength 1/10th, otherwise being arranged in space of hole 3 can not be regarded as continuously.
The cross-sectional area in the hole 3 in the present embodiment on each substrate 1 is all equal, and the degree of depth in the hole 3 on same substrate 1 is identical, and the degree of depth in the hole 3 on different substrate 1 increases continuously along function lamella 4 stacking directions.Hole 3 in the present embodiment is all cube shaped, multiple holes 3 on same substrate 1 are evenly distributed on base material 1, being uniformly distributed here refer to, the circumscribed circle center of circle of the cross section in arbitrary hole 3 and its around spacing distance between the circumscribed circle center of circle of the cross section in several holes 3 equate.
The volume in the hole 3 in the present embodiment in the unit lattice 2 of same substrate 1 is equal, so be packed into the air of equivalent in hole 3, the effective dielectric constant of the unit lattice on same function lamella 4 is all identical; The volume in the hole 3 on different substrate 1 is different and increase continuously along the stacking direction of function lamella 4, so the impedance matching element of the present embodiment forms an impedance transition mechanism layer along function lamella 4 stacking directions.When concrete enforcement, also can adopt the hole 3 of varying cross-section shape, as: triangle, other polygons such as square and regular pentagon.As long as meet on same substrate 1 porose 3 deep equality, the degree of depth in the hole 3 on different substrate 1 increases or reduces to form an impedance transition mechanism layer continuously along the stacking direction of function lamella 4, and then eliminates the change in the instantaneous impedance at interface place.
Fig. 7 is the structural representation of the 3rd embodiment of impedance matching element of the present invention, the present embodiment middle impedance matching element is by the parallel function lamella of multiple front and rear surfaces 4 along perpendicular to stacking formation of function lamella 4 surface direction, and each function lamella 4 comprises the substrate 1 of sheet and is arranged at the multiple holes 3 on substrate 1.Each substrate 1 is divided into multiple cells 2, all offers porose 3 each cell 2 is interior.The impedance of the first function lamella 4 and end function lamella 4 is same with the impedance phase of first medium and second medium respectively, and the impedance of middle some function lamellas 4 changes continuously along the stacking direction of function lamella 4, forms an impedance transition mechanism layer.In the present embodiment, the quantity in the hole 3 of each cell 2 interior settings of same substrate 1 is identical, and the quantity in the hole 3 on different substrate 1 in each cell 2 increases continuously or reduces along function lamella 4 stacking direction.The cumulative volume in the multiple holes 3 in the present embodiment in the unit lattice 2 of same substrate 1 is equal, and the effective dielectric constant of the unit lattice on same function lamella 4 is all identical; The cumulative volume in the hole 3 on different substrate 1 in individual unit lattice 2 is different and increase continuously along the cumulative volume of stacking direction individual unit lattice 2 endoporus 3 of function lamella 4, so the impedance matching element of the present embodiment forms an impedance transition mechanism layer along function lamella 4 stacking directions.
The cumulative volume in the hole 3 in above-mentioned three preferred embodiments on each cell 2 of same substrate 1 is identical, the cumulative volume in the hole 3 of the cell 2 on different substrate 1 increases continuously or reduces along the stacking direction of function lamella 4, easy to process, mold production process is simple.
When concrete enforcement, hole 3 also can adopt the hole 3 of the shape such as taper, truncated cone-shaped, as long as the volume in hole 3 is identical on same substrate 1, the volume in the hole 3 on different substrate 1 increases continuously or reduces along the stacking direction of function lamella 4, can form an impedance transition mechanism layer, realize the object of impedance matching.
Figure 8 shows that the structural representation of the 4th embodiment of the impedance matching element based on composite material technique of the present invention.The present embodiment middle impedance matching element is by the parallel function lamella of multiple front and rear surfaces 4 along perpendicular to stacking formation of function lamella 4 surface direction, and each function lamella 4 comprises the substrate 1 of sheet and is arranged at the multiple holes 3 on substrate 1.Each substrate 1 is divided into multiple cells 2, all offers porose 3 each cell 2 is interior.The impedance of the first function lamella 4 and end function lamella 4 is same with the impedance phase of first medium and second medium respectively, and the impedance of middle some function lamellas 4 changes continuously along the stacking direction of function lamella 4, forms an impedance transition mechanism layer.In the present embodiment because shape, cross-sectional sizes and the degree of depth in the hole 3 on same substrate 1 are all incomplete same, as long as meet on same substrate 1 porose 3 volume equate, the volume in the hole 3 on different substrate 1 increases or reduces to form an impedance transition mechanism layer continuously along the stacking direction of function lamella 4, and then eliminates the change in the instantaneous impedance at interface place.Compared with the impedance matching element of the impedance matching element of the present embodiment and above-mentioned two embodiment, difficulty of processing is higher, mold production process is more complicated.
Above-described embodiment, because air is inserted these apertures, can cause the electromagnetic parameter changes in distribution of this material regional area.When concrete enforcement, also can in the hole of above-described embodiment 3, fill the obturator of other and substrate 1 different materials, as iodine crystal, cupric oxide, crystal, quartz, polystyrene, sodium chloride, glass etc.For the embodiment shown in Fig. 1 and Fig. 2, can in the hole of all substrates 13, fill commaterial, the distribution of impedance of each function lamella 4 is, and each function lamella 4 can form an impedance transition mechanism layer.
When concrete enforcement, the hole 3 that volume is identical also can be set on all substrates 1, the obturator of filling in the hole 3 of same function lamella 4 has identical dielectric constant, and the dielectric constant of the obturator that difference in functionality lamella 4 is filled increases continuously or reduces along the stacking direction of function lamella.The kind of position, quantity, size distribution and packing material by design hole 3 makes the equivalent electric magnetic parameter of the unit lattice 2 of substrate 1 have larger adjusting range, to meet the requirement of the each side to electromagnetic wave control.Substrate 1 is made by ceramic material, macromolecular material, ferroelectric material, ferrite material or ferromagnetic material, and wherein macromolecular material can adopt polytetrafluoroethylene, Fr4 or F4b etc.Can on substrate 1, form hole 3 by modes such as injection moulding, punching press or numerical control punchings, if the substrate 1 that adopts ceramic material to make can be made the substrate 1 with multiple holes 3 by the mode of high temperature sintering, the hole 3 in above-mentioned all embodiment can be through hole or blind hole.
The above is the specific embodiment of the present invention; it should be pointed out that for those skilled in the art, under the premise without departing from the principles of the invention; can also make some improvements and modifications, these improvements and modifications are also considered as protection scope of the present invention.
Claims (10)
1. the impedance matching element based on composite material technique, be arranged between first medium and second medium, it is characterized in that, described element is made up of multiple function lamellas, each function lamella comprises the substrate of sheet and is arranged at the hole on described substrate, described substrate is divided into multiple cells, in each described cell, all offer porose, the impedance of the each function lamella of described element changes continuously along described function lamella stacking direction, and the impedance of the first function lamella and end function lamella is same with the impedance phase of first medium and second medium respectively; The volume in all described holes is all identical, in each hole, be all filled with the obturator with substrate different materials, the dielectric constant of the obturator that same substrate is filled is identical, and the dielectric constant of the obturator that different substrate is filled increases continuously or reduces along the stacking direction of function lamella.
2. the impedance matching element based on composite material technique as claimed in claim 1, is characterized in that, the hole on same substrate has identical volume, and the volume in the hole on different substrate increases continuously or reduces along substrate stacking direction.
3. the impedance matching element based on composite material technique as claimed in claim 2, it is characterized in that, all Kong Jun have the identical degree of depth, and the shape of cross section in the hole on same substrate is identical, and the cross-sectional area in the hole on different substrate changes continuously along substrate stacking direction.
4. the impedance matching element based on composite material technique as claimed in claim 2, is characterized in that, porosely all there is identical cross-sectional area, the hole shape of cross section on same substrate is identical, on different substrate, the degree of depth in hole changes continuously along substrate stacking direction.
5. the impedance matching element based on composite material technique as claimed in claim 2, it is characterized in that, on described substrate, be provided with the hole that multiple volumes are identical, the quantity in the hole arranging in each cell of same substrate is identical, and the quantity in the hole on different substrate in each cell increases continuously or reduces along function lamella stacking direction.
6. the impedance matching element based on composite material technique as described in claim 2～5 any one, is characterized in that, is all filled with the obturator of same material in each described hole, and the material of described obturator is different from the material of substrate.
7. the impedance matching element based on composite material technique as claimed in claim 1, is characterized in that, described hole is formed on described substrate by the mode of injection moulding, punching press or numerical control punching.
8. the impedance matching element based on composite material technique as claimed in claim 1, is characterized in that, described hole is through hole or blind hole.
9. the impedance matching element based on composite material technique as claimed in claim 6, is characterized in that, described obturator is air, iodine crystal, cupric oxide, crystal, quartz.
10. the impedance matching element based on composite material technique as claimed in claim 1, is characterized in that, described plate shape substrates is made by ceramic material, macromolecular material, ferroelectric material, ferrite material or ferromagnetic material.
Priority Applications (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110111601.6A CN102769192B (en) | 2011-04-30 | 2011-04-30 | Impedance matching element based on mixed material process |
| PCT/CN2011/083208 WO2012126256A1 (en) | 2011-03-18 | 2011-11-30 | Impedance matching component and hybrid wave-absorbing material |
| EP11855247.0A EP2688380B1 (en) | 2011-03-18 | 2011-11-30 | Impedance matching component and hybrid wave-absorbing material |
| US13/522,499 US8421550B2 (en) | 2011-03-18 | 2011-11-30 | Impedance matching component and hybrid wave-absorbing material |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201110111601.6A CN102769192B (en) | 2011-04-30 | 2011-04-30 | Impedance matching element based on mixed material process |
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| CN102769192A CN102769192A (en) | 2012-11-07 |
| CN102769192B true CN102769192B (en) | 2014-10-01 |
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| CN106332533B (en) * | 2015-07-10 | 2020-03-20 | 深圳光启尖端技术有限责任公司 | Wave-absorbing metamaterial |
| CN109546351B (en) * | 2018-11-27 | 2020-12-22 | 中国科学院金属研究所 | Foam medium-based metamaterial with broadband electromagnetic wave absorption function |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1700034A (en) * | 2004-05-21 | 2005-11-23 | 粟毅 | Impedance matching device for broad band impulse signal ground penetrating radar |
| CN101867094A (en) * | 2010-05-02 | 2010-10-20 | 兰州大学 | Focusing panel antenna |
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- 2011-04-30 CN CN201110111601.6A patent/CN102769192B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1700034A (en) * | 2004-05-21 | 2005-11-23 | 粟毅 | Impedance matching device for broad band impulse signal ground penetrating radar |
| CN101867094A (en) * | 2010-05-02 | 2010-10-20 | 兰州大学 | Focusing panel antenna |
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