CN103187604B - A kind of wave filter - Google Patents
A kind of wave filter Download PDFInfo
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- CN103187604B CN103187604B CN201110216572.XA CN201110216572A CN103187604B CN 103187604 B CN103187604 B CN 103187604B CN 201110216572 A CN201110216572 A CN 201110216572A CN 103187604 B CN103187604 B CN 103187604B
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- wave filter
- metamaterial sheet
- resonator cavity
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- 239000000463 material Substances 0.000 claims abstract description 23
- 239000000758 substrate Substances 0.000 claims abstract description 14
- 239000000203 mixture Substances 0.000 claims abstract description 9
- 239000004020 conductor Substances 0.000 claims abstract description 6
- 239000003822 epoxy resin Substances 0.000 claims description 4
- 229920000647 polyepoxide Polymers 0.000 claims description 4
- 229950000845 Politef Drugs 0.000 claims description 3
- 239000003302 ferromagnetic material Substances 0.000 claims description 3
- 229910000529 magnetic ferrite Inorganic materials 0.000 claims description 3
- 229910000859 α-Fe Inorganic materials 0.000 claims description 3
- 239000002184 metal Substances 0.000 description 23
- 229910052751 metal Inorganic materials 0.000 description 23
- 208000002925 Dental Caries Diseases 0.000 description 2
- 238000005452 bending Methods 0.000 description 2
- 238000001914 filtration Methods 0.000 description 2
- 239000006260 foam Substances 0.000 description 2
- 230000001629 suppression Effects 0.000 description 2
- 241000446313 Lamella Species 0.000 description 1
- -1 as politef Substances 0.000 description 1
- 239000010426 asphalt Substances 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000005755 formation reaction Methods 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000005291 magnetic Effects 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 229910052709 silver Inorganic materials 0.000 description 1
- 239000004332 silver Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
Abstract
The present invention relates to a kind of wave filter, the input including at least one resonator cavity, being contained on described resonator cavity two side and outfan, described intra resonant cavity is placed with at least one metamaterial sheet, each metamaterial sheet includes the nonmetallic materials substrate made and the man-made microstructure adhered on the surface of the substrate, and described man-made microstructure is the structure with geometrical pattern of the silk thread composition of conductive material.Use the wave filter of the present invention, after it adds metamaterial sheet, multiple resonant frequencies can be drawn in, cause the bandwidth of single resonator cavity to broaden, it is thus possible to bear powerful wave filter, therefore can realize the miniaturization of wave filter.
Description
Technical field
The present invention relates to wireless communication field, more particularly, it relates to a kind of wave filter.
Background technology
In microwave device, cavity body filter is critically important a kind of device.Cavity body filter is by several micro-
Wave resonance chamber composition, each resonator cavity has being surrounded by conductive wall (or magnetic conducting wall) of an arbitrary shape
Cavity, and the areas of dielectric of electromagnetic oscillation can be formed wherein, it has storage electromagnetic energy and selects certain
The characteristic of frequency signal.
Resonator cavity is the resonant element worked at microwave frequencies, and each resonator cavity has the resonant frequency of oneself,
The bandwidth of each resonator cavity is the narrowest.If thought of as a high-power wave filter, bandwidth is needed to compare
Width, if smaller bandwidth, will be unable to bear the highest power.In order to increase bandwidth, wave filter can use many
Individual microwave cavity, the resonant frequency of each resonator cavity can be slightly different, and the most multiple resonator cavitys combine one
Act the wave filter being the formation of a broadband, but this causes the sufficiently bulky of wave filter.
Summary of the invention
The technical problem to be solved in the present invention is, for prior art above-mentioned single resonator cavity bandwidth very
Narrow so that multiple resonator cavitys cause filtering puies forward sufficiently bulky defect, it is provided that the filtering of a kind of broader bandwidth
Device.
The technical solution adopted for the present invention to solve the technical problems is: a kind of wave filter of structure, including at least
One resonator cavity, the input being contained on described resonator cavity two side and outfan, described intra resonant cavity is put
Being equipped with at least one metamaterial sheet, each metamaterial sheet includes substrate and the attachment that nonmetallic materials make
Man-made microstructure on the surface of the substrate, described man-made microstructure is that having of the silk thread composition of conductive material is several
The structure of what pattern.
In wave filter of the present invention, described metamaterial sheet has multiple, and all metamaterial sheet are mutual
Interval is arranged or surface links into an integrated entity in contact abreast.
In wave filter of the present invention, being provided with bearing in described resonator cavity, described metamaterial sheet is solid
It is scheduled on described bearing.
In the wave filter of the present invention, described bearing is made up of electromagnetic wave transparent material.
In wave filter of the present invention, described man-made microstructure is I-shaped or I-shaped derivative
Shape.
In wave filter of the present invention, described man-made microstructure is cross or criss-cross derivative
Shape.
In wave filter of the present invention, described criss-cross derivative shape has four identical branch roads, appoints
One branch road with any be center of rotation successively 90-degree rotation, 180 degree, after 270 degree successively respectively at other three
Individual branch road overlaps.
In wave filter of the present invention, three branch roads in each branch road one end and other end points altogether is connected, separately
One end is free end, is provided with at least one kink between two ends.
In wave filter of the present invention, the free end of described branch road connects a line segment.
In wave filter of the present invention, the material of described substrate is pottery, politef, asphalt mixtures modified by epoxy resin
Fat, ferroelectric material, ferrite material, ferromagnetic material or FR-4 material.
Implementing the wave filter of the present invention, have the advantages that the wave filter using the present invention, it adds
After metamaterial sheet, multiple resonant frequencies can be drawn in, cause the bandwidth of single resonator cavity to broaden, thus
Powerful wave filter, namely single-chamber high power filter can be born, therefore can realize the little of wave filter
Type.
Accompanying drawing explanation
Below in conjunction with drawings and Examples, the invention will be further described, in accompanying drawing:
Fig. 1 is the structural representation of the wave filter of the preferred embodiment of the present invention；
Fig. 2 is the structural representation of the metamaterial sheet of wave filter shown in Fig. 1；
Fig. 3 be man-made microstructure be the structural representation of I-shaped derivative shape；
Fig. 4 be man-made microstructure be the structural representation of criss-cross derivative shape；
Fig. 5 to Fig. 8 be man-made microstructure be the structural representation of another four kinds of criss-cross derivative shapes.
Detailed description of the invention
The present invention relates to a kind of wave filter, be primarily referred to as microwave filter, as it is shown in figure 1, its internal be to
A few resonator cavity 8, the both sides of resonator cavity 8 are equipped with input and outfan.The present invention is in resonator cavity 8
The medium filled is Meta Materials, and Meta Materials can increase the bandwidth of resonator cavity, thus reduce filter cavity
Number, and then realize the miniaturization of wave filter.
As it is shown in figure 1, Meta Materials includes at least one metamaterial sheet 1.When metamaterial sheet 1 has one
Time, can be affixed directly in resonator cavity 8.When metamaterial sheet 1 has multiple, multiple Meta Materials
Lamella 1 surface is the most bonding integral, it is possible to place wave transparent material between adjacent two metamaterial sheet 1
Expect that such as they are separated by foam.Bearing can be placed in resonator cavity 8, bearing arrange slot, by multiple
In the overall insertion slot that metamaterial sheet 1 is constituted, the placement so that they are parallel to each other.Bearing preferably steeps
The electromagnetic wave transparent materials such as foam plastics.Metamaterial sheet 1 shown in figure totally 14, it is mutually bonded together,
Input and outfan are against in the both side surface of metamaterial sheet 1 respectively.Certainly, input and outfan
Can not also contact with metamaterial sheet.
Metamaterial sheet 1 includes flat substrate 3 and the man-made microstructure 2 being attached on substrate 3 surface.
Wherein, substrate 3 is made up of nonmetallic materials, as politef, epoxy resin, pottery, ferroelectric material,
Ferrite material, ferromagnetic material, FR-4 material etc..Man-made microstructure 2 is that at least silk thread is at substrate 3
The structure of certain geometrical pattern of composition, such as I-shaped, split ring resonator shape etc. on surface.Artificial
The silk thread of micro structure 2 is made of an electrically conducting material, usually metal such as silver, copper etc., it is also possible to use other
Nonmetallic conductive material such as ITO makes.The live width of these silk threads, within 1mm, preferably can be processed
Minimum feature such as 0.1mm；The very thin thickness of silk thread, the usually thickness of coating, in the present invention generally
Less than 0.1mm, such as 0.018mm.
The geometrical pattern of man-made microstructure 2 has a variety of situation, it is known that as I-shaped, it includes being in line
The first metal wire 201 and be connected to the first metal wire 201 two ends and vertically divided equally by the first metal wire 201
Two second metal wires 202；Such I-shaped man-made microstructure can also derive further, obtains work
The derivative shape of font, as it is shown on figure 3, it is in addition to first, second metal wire, also includes being connected to
Every second metal wire 202 two ends and the 3rd metal wire 203 vertically divided equally by the second metal wire 202, point
It is not connected to every 3rd metal wire 203 two ends and the 4th metal wire vertically divided equally by the 3rd metal wire 203
204, the rest may be inferred, continues derivative.
Equally, the man-made microstructure 2 of the present invention can also is that criss-cross derivative shape, and it includes two vertically
And divide mutually criss-cross first metal wire 201 of composition equally, also include being connected to every first metal wire
201 two ends and the second metal wire 202 vertically divided equally by the first metal wire 201, the derivative shape of composition such as figure
Shown in 2；Further, when man-made microstructure is in addition to first, second metal wire, may also include and connect respectively
At every second metal wire 202 two ends and the 3rd metal wire 203 vertically divided equally by the second metal wire 202,
And be connected to every 3rd metal wire 203 two ends and vertically divided equally by every 3rd metal wire 203
4th metal wire 204, then its structure is as shown in Figure 4.All right the rest may be inferred, obtains other derived structures.
In the embodiment of other criss-cross derivative shapes, man-made microstructure 2 includes four identical branch roads
210, arbitrary branch road 210 with any be center of rotation successively 90-degree rotation, 180 degree, after 270 degree successively
Overlap respectively at other three branch roads 210.Therefore, such man-made microstructure 2 is isotropic structure,
It is the most identical to the response characteristic of electromagnetic wave in all directions of the plane at place, above-mentioned such as Fig. 2, Fig. 4
Criss-cross derivative shape man-made microstructure also have characteristics that.Certainly, in above-described embodiment, four
Branch road 210 can totally one end points thus connect as one.
As shown in Fig. 5 to Fig. 8, three branch roads in each branch road 210 one end and other 210 end points altogether is connected,
The other end is free end, is provided with at least one kink between two ends.Here kink can be right angle
Bending, as shown in Figure 5, it is also possible to be that wedge angle bends as shown in Figure 6, Figure 7, it is also possible to be fillet bending,
As shown in Figure 8.The outside of free end also can connect straightway, as shown in Figure 7, Figure 8, preferably is from
It is connected with the midpoint of this line segment by the end points held.
Due to the existence of the man-made microstructure 2 that conductive material is made, reduce resonant frequency, and produce two
The resonant frequency closed on very much, ultimately results in resonator cavity and has bigger bandwidth, and the most single resonator cavity just may be used
To bear powerful wave filter, so that wave filter miniaturization is possibly realized.
Such as, resonator cavity shown in Fig. 1 is the cube of 20mm × 20mm × 20mm, metamaterial sheet
For 7mm × 5.6mm × 1.018mm, altogether 6 metamaterial sheet, substrate is FR-4 epoxy resin,
Thickness is 1mm, and each man-made microstructure is criss-cross derivative shape as shown in Figure 1 and Figure 2, its size
For 1.4mm × 1.4mm, on every piece of substrate, array is placed with 20 man-made microstructure.By emulation,
First, second resonant frequency is 0, and the three, the 4th resonant frequencies are respectively 3.810GHz, 3.861GHz,
The two composition exceedes the bandwidth of at least 50MHz.And in same resonator cavity, do not place metamaterial sheet
Words, the first resonant frequency is 6.100GHz, and the second resonant frequency is 8.360GHz, and the 3rd resonant frequency is
9.938GHz, the 4th resonant frequency is 9.938GHz, and first, second resonant frequency differs by more than 2GHz,
Broadband cannot be formed.It addition, resonator cavity has the most different moulds, correspond to different resonant frequencies,
Using embodiments of the invention, first, second resonant frequency is 0, shows that low-order mode is suppressed, high-order mode
Being excited, more high-order mode then Q-value is the highest, and Q-value height means that the loss of resonator cavity is little.This is also this
One of advantage of invention.
As can be seen here, use the wave filter of the present invention, after it adds metamaterial sheet 1, can be by multiple resonance
Frequency draws in, and causes the bandwidth of single resonator cavity to broaden, it is thus possible to bear powerful wave filter, also
I.e. single-chamber high power filter, therefore can realize the miniaturization of wave filter, the most also have suppression low-order mode
Low-loss advantage drops.
Above in conjunction with accompanying drawing, embodiments of the invention are described, but the invention is not limited in above-mentioned
Detailed description of the invention, above-mentioned detailed description of the invention is only schematic rather than restrictive, this
The those of ordinary skill in field, under the enlightenment of the present invention, is being protected without departing from present inventive concept and claim
Under the ambit protected, it may also be made that a lot of form, within these belong to the protection of the present invention.
Claims (6)
1. a wave filter, including at least one resonator cavity, the input that is contained on described resonator cavity two side
End and outfan, it is characterised in that described intra resonant cavity is placed with at least one metamaterial sheet, each
Metamaterial sheet includes substrate and attachment man-made microstructure on the surface of the substrate, the institute that nonmetallic materials make
State the structure with geometrical pattern of the silk thread composition that man-made microstructure is conductive material, wherein, described artificial
Micro structure includes four branch roads, and three branch roads in each branch road one end and other end points altogether is connected, and the other end is certainly
By holding, arbitrary described branch road turn 90 degrees with described altogether end points for center of rotation successively dextrorotation, 180 degree
Overlapping with other three branch roads respectively after 270 degree, described branch road includes at least one kink, described people
The kink making micro structure is fillet or wedge angle.
Wave filter the most according to claim 1, it is characterised in that described metamaterial sheet has multiple,
All metamaterial sheet are spaced setting in parallel to each other or surface links into an integrated entity in contact.
Wave filter the most according to claim 2, it is characterised in that be provided with in described resonator cavity and prop up
Seat, described metamaterial sheet is fixed on described bearing.
Wave filter the most according to claim 3, it is characterised in that described bearing is by electromagnetic wave transparent material system
Become.
Wave filter the most according to claim 1, it is characterised in that the free end of described branch road connects
There is a line segment.
Wave filter the most according to claim 1, it is characterised in that the material of described substrate be pottery,
Politef, epoxy resin, ferroelectric material, ferrite material, ferromagnetic material or FR-4 material.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110216572.XA CN103187604B (en) | 2011-07-29 | A kind of wave filter | |
| PCT/CN2011/083811 WO2013016920A1 (en) | 2011-07-29 | 2011-12-12 | Resonant cavity and filter having the resonant cavity |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110216572.XA CN103187604B (en) | 2011-07-29 | A kind of wave filter |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103187604A CN103187604A (en) | 2013-07-03 |
| CN103187604B true CN103187604B (en) | 2016-12-14 |
Family
ID=
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1575529A (en) * | 2001-10-26 | 2005-02-02 | 香港科技大学 | Planar band gap materials |
| JP2005223665A (en) * | 2004-02-06 | 2005-08-18 | Tamagawa Electronics Co Ltd | Dielectric resonator and filter device |
| CN1787280A (en) * | 2004-12-09 | 2006-06-14 | 上海方盛信息科技有限责任公司 | Electromagnetic forbidden band structure material |
| CN101026257A (en) * | 2007-02-09 | 2007-08-29 | 哈尔滨工业大学 | Super-small resonant cavity |
| CN102064374A (en) * | 2010-12-17 | 2011-05-18 | 哈尔滨工程大学 | Heterodromous medium-based splitting type resonator |
| CN202275901U (en) * | 2011-07-29 | 2012-06-13 | 深圳光启高等理工研究院 | Filter |
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1575529A (en) * | 2001-10-26 | 2005-02-02 | 香港科技大学 | Planar band gap materials |
| JP2005223665A (en) * | 2004-02-06 | 2005-08-18 | Tamagawa Electronics Co Ltd | Dielectric resonator and filter device |
| CN1787280A (en) * | 2004-12-09 | 2006-06-14 | 上海方盛信息科技有限责任公司 | Electromagnetic forbidden band structure material |
| CN101026257A (en) * | 2007-02-09 | 2007-08-29 | 哈尔滨工业大学 | Super-small resonant cavity |
| CN102064374A (en) * | 2010-12-17 | 2011-05-18 | 哈尔滨工程大学 | Heterodromous medium-based splitting type resonator |
| CN202275901U (en) * | 2011-07-29 | 2012-06-13 | 深圳光启高等理工研究院 | Filter |
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