CN103296347A - Artificial electromagnetic material and filter using same - Google Patents
Artificial electromagnetic material and filter using same Download PDFInfo
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- CN103296347A CN103296347A CN2012100502403A CN201210050240A CN103296347A CN 103296347 A CN103296347 A CN 103296347A CN 2012100502403 A CN2012100502403 A CN 2012100502403A CN 201210050240 A CN201210050240 A CN 201210050240A CN 103296347 A CN103296347 A CN 103296347A
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- closed curve
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Abstract
The invention relates to an artificial electromagnetic material. The artificial electromagnetic material comprises at least one artificial electromagnetic material sheet layer. Each artificial electromagnetic material sheet layer comprises a substrate and metal microstructures attached to the substrate. Each artificial microstructure is a structure remaining after a pattern is etched in a solid metal sheet. Each etched pattern comprises a centrosymmetric closed curve and a plurality of line segments, wherein the line segments are symmetrical to the central point of the closed curve and equally divide the closed curve. The invention further provides a filter using the artificial electromagnetic material. The filter comprises a resonant cavity and a harmonic oscillator, wherein the harmonic oscillator is arranged in the resonant cavity and made of the artificial electromagnetic material. The dielectric constant of the artificial electromagnetic material with the metal microstructures is greatly improved, and the application of the artificial electromagnetic material to the filter is beneficial to miniaturization of the filter.
Description
[technical field]
The present invention relates to field of new, be specifically related to a kind of filter that has the artificial electromagnetic material of high-k and use this material.
[background technology]
Dielectric constant be material to a parameter of electric field response, material can produce charge inducing and weaken electric field when extra electric field, the ratio of electric field is dielectric constant in the extra electric field in the former vacuum and the final material.
Occurring in nature, any material have its specific dielectric constant values or dielectric constant curve under given conditions.The higher material of dielectric constant is placed in the electric field, and the intensity of electric field can have considerable decline in dielectric substance.In high dielectric constant material, electromagnetic wavelength is very short, can dwindle the size of radio frequency and microwave device greatly.
Along with technology development with rapid changepl. never-ending changes and improvements, people are more and more higher to the application requirements of material, in some occasion, needed dielectric constant values is far above the dielectric constant values of the existing material of nature, the higher dielectric insulator of existing dielectric constant can not reach requirement, and this will cause bottleneck for technology and research and development of products.Therefore, people turn to made artificial electromagnetic material.
Filter is one of common device in the radiotechnics, is widely used in the electronic equipments such as communication, radar, navigation, electronic countermeasures, satellite, test instrumentation.Filter has resonant cavity, and the volume of filter depends primarily on number and the volume of resonant cavity.And the resonance frequency of microwave cavity depends on the volume in this chamber, in general, the more big resonance frequency of resonant cavity volume is more low, therefore the more little resonance frequency of resonant cavity volume is more high, how to be implemented in the resonance frequency that reduces resonant cavity under the situation that does not increase resonant cavity size and to have great importance for the miniaturization of filter.
Usually in resonant cavity, arrange and have the harmonic oscillator of low-loss, high-k, can under the condition of the volume that does not change resonant cavity, effectively reduce the resonance frequency of resonant cavity, but general increase along with dielectric constant, loss also can increase thereupon, and the multiplication factor of loss is higher than the multiplication factor of dielectric constant far away.
[summary of the invention]
Technical problem to be solved by this invention is: at the defective of prior art, provide a kind of high-k artificial electromagnetic material that has.
The technical solution adopted for the present invention to solve the technical problems is: a kind of artificial electromagnetic material, comprise at least one sheet of material, described sheet of material comprises substrate and a plurality of artificial micro-structural that is attached on the substrate surface, described artificial micro-structural is the remaining structure of etched pattern on the solid metal sheet, and described etched pattern comprises a centrosymmetric closed curve and about described closed curve central point and divide many line segments of described closed curve equally.
One end of described every line segment is in described closed curve, and the other end of described every line segment is free end, and described free end is on the described closed curve or outside described closed curve.
The bar number of described line segment is even number.
Described centrosymmetric closed curve is square or circle or rectangle.
Described closed curve all is made of the closed hollow structure that links to each other successively with every line segment.
Described closed hollow structure is square, circle, triangle or rectangle.
Described closed hollow structure is that point links to each other with point or the limit links to each other with the limit or face intersects with face portion.
A kind of filter, comprise resonant cavity and the harmonic oscillator that is positioned at resonant cavity, described harmonic oscillator is artificial electromagnetic material, this artificial electromagnetic material comprises at least one artificial electromagnetic material lamella, each described artificial electromagnetic material lamella comprises substrate and the metal micro structure that is attached on the described substrate, described artificial micro-structural is the remaining structure of etched pattern on the solid metal sheet, and described etched pattern comprises a centrosymmetric closed curve and about described closed curve central point and divide many line segments of described closed curve equally.
One end of described every line segment is in described closed curve, and the other end of described every line segment is free end.
The bar number of described line segment is even number.
Implement the present invention and have following beneficial effect: by adhere to the artificial micro-structural with geometry of the present invention at substrate, make artificial electromagnetic material have higher dielectric constant, this artificial electromagnetic material is applied in the miniaturization that is conducive to filter in the filter.
[description of drawings]
Fig. 1 is the structure chart of a material cell of a kind of artificial electromagnetic material of mentioning in the embodiment of the invention;
Fig. 2 is the size schematic diagram of material cell shown in Figure 1;
Fig. 3 is the structural representation that comprises the artificial electromagnetic material of material cell composition shown in Figure 1;
Fig. 4 is the simulated effect figure of the artificial electromagnetic material of material cell composition shown in Figure 2;
Fig. 5 is the structure chart of a material cell of the another kind of artificial electromagnetic material mentioned in the embodiment of the invention.
[embodiment]
In order to make purpose of the present invention, technical scheme and advantage clearer, below in conjunction with drawings and Examples, the present invention is further elaborated.Should be appreciated that specific embodiment described herein only in order to explaining the present invention, and be not used in restriction the present invention.
The present invention relates to a kind of artificial electromagnetic material, as shown in Figure 3, comprise at least one sheet of material, each sheet of material comprises substrate 1 and a plurality of artificial micro-structural 2 that is attached on the substrate surface, substrate is made by macromolecular material or ceramic material, macromolecular material such as polytetrafluoroethylene, epoxy resin etc. commonly used.Artificial micro-structural 2 is at substrate surface periodically arranges, and for example rectangular array is arranged, and namely be row with the X-axis, serve as that row are arranged with the Y-axis perpendicular to X-axis, and each line space, each column pitch equate respectively, even line space equals column pitch and all can.When sheet of material has when a plurality of, each sheet of material is arranged in order along the Z axle perpendicular to substrate surface, is arranged in parallel between the sheet of material.
Because artificial micro-structural 2 array arrangements, therefore substrate 1 can be divided into virtually a plurality of base board units 20 of same array arrangement, the length of base board unit 20 equals above line spacing, width and equals the thickness that column pitch, thickness equal substrate.On the surface of each base board unit just in time to an artificial micro-structural should be arranged.
The invention has the advantages that, designed a kind of new geometric artificial micro-structural 2 that has, artificial micro-structural 2 is the remaining structure of etched pattern on solid metal sheet 3, and what the pattern that etches away showed in the accompanying drawings is black, and white remaining on the solid metal sheet 3 is artificial micro-structural 2; This etched pattern comprises a centrosymmetric closed curve and distributes and divide many line segments of described closed curve equally about described closed curve central point, one end of every line segment is in the symmetry closed curve of center, the other end is free end, this free end can be all on the closed curve or all outside closed curve, also can be wherein a part at the last branch of closed curve outside closed curve, and the bar number of this line segment is even number, closed curve all is made of the closed hollow structure that links to each other successively with every line segment, this closed hollow structure can be square, circular, triangle, rectangle also can be other shapes applicatory.
As shown in Figure 1, in the present embodiment in the etched pattern this centrosymmetric closed curve be the square, and should square being divided equally by eight line segments 5,6,7,8,9,10,11,12 is eight equal portions, wherein four line segments 5,7,9,11 free end 14 are on closed curve, in addition four line segments 6,8,10,12 free end 13 be outside closed curve, and free end is 45 ° at four line segments on the closed curve with the angle that four line segments of free end closed curve outside replace arrangement and adjacent two line segments; These eight line segments all are made of the hollow little square that links to each other successively with closed curve, and the central point 4 of closed curve also is hollow little square, simultaneously, the hollow little square of this closed curve be to angle point with angle point is linked to each other, link to each other with the limit and the hollow little square of four line segments of free end on closed curve is the limit, in addition the hollow little square of four line segments of free end outside closed curve be to angle point with angle point is linked to each other; Simultaneously, the hollow little square of the free end in four line segments of free end on closed curve adopts the edge-to-edge to link to each other with the hollow little square at the place, diagonal angle of square closed curve, in addition, also can adopt to angle point with angle point is linked to each other or face intersects with face portion and links to each other;
As shown in Figure 2, when solid metal sheet 3 was square, the foursquare length of side was 1.9mm, and each base board unit is of a size of 0.8mm * 2mm * 2mm, and wherein 0.8mm is the thickness of substrate; In the etched pattern closed curve be in the square every limit by seven hollow little squares to angle point with angle point is connected to form, this hollow little foursquare side length b is 0.1mm; Four line segments of free end on closed curve are linked to each other with the limit by six hollow little square limits respectively and constitute, and this hollow little foursquare length of side a is 0.1mm; Four line segments of free end outside closed curve are made of with angle point is linked to each other angle point seven hollow little squares respectively, this hollow little foursquare length of side c is 0.1mm, and simultaneously with as the hollow little square of closed curve central point also to angle point with angle point is linked to each other, the hollow little foursquare length of side d of central spot also is 0.1mm.
The material of this metal micro structure is copper, it also can be other electric conducting material, what substrate adopted is that dielectric constant is 35 ceramic material, and metal micro structure is attached on the substrate by etching method, also can adopt platings, bore carve, methods such as electronics quarter or ion quarter.Be that the artificial electromagnetic material in the present embodiment is carried out the dielectric constant characteristic curve schematic diagram that emulation obtains as shown in Figure 4, as shown in Figure 4, the dielectric constant of this artificial electromagnetic material is about 111 in 1.5GHz～3GHz scope, with respect to pure ceramic material, the dielectric constant of this artificial electromagnetic material has improved about 3 times, and the electromagnetic consumable of this artificial electromagnetic material does not obviously increase simultaneously.
This closed curve and line segment also can be mixed by circular and square and link to each other, and form shape as shown in Figure 5, and can be point-to-point continuous, also can be that the edge-to-edge is continuous, can also be face intersects with face portion and links to each other.
The present invention also provides a kind of filter that uses above-mentioned artificial electromagnetic material, and this filter comprises resonant cavity and be positioned at the harmonic oscillator of resonant cavity that harmonic oscillator wherein adopts the artificial electromagnetic material in the present embodiment.Because the artificial electromagnetic material in the present embodiment has higher dielectric constant, so adopt the harmonic oscillator of this artificial electromagnetic material to be conducive to the miniaturization of filter.
By the number of plies that changes substrate in the medium substrate, the modes such as shape and size of metal micro structure, can further adjust and improve the dielectric constant of medium substrate, make it satisfy special occasions to the demand of high-k.
By reference to the accompanying drawings embodiments of the invention are described above; but the present invention is not limited to above-mentioned embodiment; above-mentioned embodiment only is schematic; rather than it is restrictive; those of ordinary skill in the art also can make a lot of distortion not breaking away under the scope situation that aim of the present invention and claim protect under enlightenment of the present invention.Can be other various geometries such as metal micro structure, the solid metal sheet is not limited to square, also can be shapes such as circle, rectangle, and centrosymmetric closed curve also can be rectangle, circle etc.; Metal micro structure is not limited to be distributed on the face of substrate, and metal micro structure can be attached on positive and negative two faces of substrate, also can be that these all belong within protection scope of the present invention between two substrates.
Claims (10)
1. artificial electromagnetic material, comprise at least one sheet of material, described sheet of material comprises substrate and a plurality of artificial micro-structural that is attached on the substrate surface, it is characterized in that, described artificial micro-structural is the remaining structure of etched pattern on the solid metal sheet, and described etched pattern comprises a centrosymmetric closed curve and about described closed curve central point and divide many line segments of described closed curve equally.
2. artificial electromagnetic material according to claim 1 is characterized in that, an end of described every line segment is in described closed curve, and the other end of described every line segment is free end, and described free end is on the described closed curve or outside described closed curve.
3. artificial electromagnetic material according to claim 1 and 2 is characterized in that, the bar number of described line segment is even number.
4. artificial electromagnetic material according to claim 1 is characterized in that, described centrosymmetric closed curve is square or circle or rectangle.
5. artificial electromagnetic material according to claim 1 is characterized in that, described closed curve all is made of the closed hollow structure that links to each other successively with every line segment.
6. artificial electromagnetic material according to claim 5 is characterized in that, described closed hollow structure is square, circle, triangle or rectangle.
7. artificial electromagnetic material according to claim 6 is characterized in that, described closed hollow structure is that point links to each other with point or the limit links to each other with the limit or face intersects with face portion.
8. filter, comprise resonant cavity and the harmonic oscillator that is positioned at resonant cavity, it is characterized in that, described harmonic oscillator is artificial electromagnetic material, this artificial electromagnetic material comprises at least one artificial electromagnetic material lamella, each described artificial electromagnetic material lamella comprises substrate and the metal micro structure that is attached on the described substrate, described artificial micro-structural is the remaining structure of etched pattern on the solid metal sheet, and described etched pattern comprises a centrosymmetric closed curve and about described closed curve central point and divide many line segments of described closed curve equally.
9. filter according to claim 8 is characterized in that, an end of described every line segment is in described closed curve, and the other end of described every line segment is free end, and described free end is on the described closed curve or outside described closed curve.
10. according to Claim 8 or 9 described filters, it is characterized in that the bar number of described line segment is even number.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201210050240.3A CN103296347B (en) | 2012-02-29 | 2012-02-29 | A kind of artificial electromagnetic material and use the wave filter of this material |
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| CN201210050240.3A CN103296347B (en) | 2012-02-29 | 2012-02-29 | A kind of artificial electromagnetic material and use the wave filter of this material |
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| CN103296347A true CN103296347A (en) | 2013-09-11 |
| CN103296347B CN103296347B (en) | 2016-12-14 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113745842A (en) * | 2021-08-23 | 2021-12-03 | 东风汽车集团股份有限公司 | Metamaterial wave-absorbing structure applied to millimeter wave radar and vehicle antenna thereof |
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| US20040008145A1 (en) * | 2002-07-11 | 2004-01-15 | Harris Corporation | Spatial filtering surface operative with antenna aperture for modifying aperture electric field |
| US20060152302A1 (en) * | 2003-03-04 | 2006-07-13 | Keiichi Hirose | Dielectric resonator device, dielectric filter, duplexer, and high-frequency communication apparatus |
| CN1874053A (en) * | 2006-06-08 | 2006-12-06 | 上海交通大学 | Miniaturized band-pass filter with harmonic suppression for loading fan-shaped offset of microstrip |
| CN101867094A (en) * | 2010-05-02 | 2010-10-20 | 兰州大学 | Focusing panel antenna |
| US20110304521A1 (en) * | 2009-03-06 | 2011-12-15 | Nec Corporation | Resonator antenna and communication apparatus |
-
2012
- 2012-02-29 CN CN201210050240.3A patent/CN103296347B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20040008145A1 (en) * | 2002-07-11 | 2004-01-15 | Harris Corporation | Spatial filtering surface operative with antenna aperture for modifying aperture electric field |
| US20060152302A1 (en) * | 2003-03-04 | 2006-07-13 | Keiichi Hirose | Dielectric resonator device, dielectric filter, duplexer, and high-frequency communication apparatus |
| CN1874053A (en) * | 2006-06-08 | 2006-12-06 | 上海交通大学 | Miniaturized band-pass filter with harmonic suppression for loading fan-shaped offset of microstrip |
| US20110304521A1 (en) * | 2009-03-06 | 2011-12-15 | Nec Corporation | Resonator antenna and communication apparatus |
| CN101867094A (en) * | 2010-05-02 | 2010-10-20 | 兰州大学 | Focusing panel antenna |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113745842A (en) * | 2021-08-23 | 2021-12-03 | 东风汽车集团股份有限公司 | Metamaterial wave-absorbing structure applied to millimeter wave radar and vehicle antenna thereof |
| CN113745842B (en) * | 2021-08-23 | 2023-12-26 | 东风汽车集团股份有限公司 | Metamaterial wave-absorbing structure applied to millimeter wave radar and vehicle antenna thereof |
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| CN103296347B (en) | 2016-12-14 |
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Effective date of registration: 20210422 Address after: 518057 2 / F, software building, No.9, Gaoxin Middle Road, Nanshan District, Shenzhen, Guangdong Province Patentee after: KUANG-CHI INSTITUTE OF ADVANCED TECHNOLOGY Address before: 518034. A, 18B, CIC international business center, 1061 Mei Xiang Road, Shenzhen, Guangdong, Futian District Patentee before: KUANG-CHI INNOVATIVE TECHNOLOGY Ltd. |
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