CN103187604A - Filter - Google Patents
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- CN103187604A CN103187604A CN201110216572XA CN201110216572A CN103187604A CN 103187604 A CN103187604 A CN 103187604A CN 201110216572X A CN201110216572X A CN 201110216572XA CN 201110216572 A CN201110216572 A CN 201110216572A CN 103187604 A CN103187604 A CN 103187604A
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Abstract
The invention relates to a filter which comprises at least one resonant cavity, as well as an input end and an output end mounted on two side walls of the resonant cavity, wherein at least one metamaterial sheet layer is placed in the resonant cavity; each metamaterial sheet layer comprises a substrate made of a non-metal material and an artificial microstructure attached to the surface of the substrate; and each artificial microstructure is formed by threads of a conductive material and has a geometric pattern. With the adoption of the filter, after the metamaterial sheet layers are added, multiple resonant frequencies can be drawn in, the bandwidth of the single resonant cavity is expanded, so that the filter can bear high power, and the miniaturization of the filter can be realized.
Description
Technical field
The present invention relates to wireless communication field, more particularly, relate to a kind of filter.
Background technology
In microwave device, cavity body filter is very important a kind of device.Cavity body filter is made up of several microwave cavities, each resonant cavity has the cavity by conductive wall (or magnetic conducting wall) encirclement of an arbitrary shape, and can form the areas of dielectric of electromagnetic viscosimeter therein, it has the characteristic that stores electromagnetic energy and select the certain frequency signal.
Resonant cavity is the resonant element of working under microwave frequency, and each resonant cavity has the resonance frequency of oneself, very narrow of the bandwidth of each resonant cavity.If want to do a high-power filter, need bandwidth wideer, if smaller bandwidth can't be born very high power.In order to increase bandwidth, filter can use a plurality of microwave cavities, and the resonance frequency of each resonant cavity can be slightly different, and a plurality of like this resonant cavitys are combined the filter that has just formed a broadband, but this causes the volume of filter very big.
Summary of the invention
The technical problem to be solved in the present invention is, at the smaller bandwidth of the above-mentioned single resonant cavity of prior art thereby need a plurality of resonant cavitys cause filtering to put forward the very big defective of volume, provides a kind of filter of broader bandwidth.
The technical solution adopted for the present invention to solve the technical problems is: construct a kind of filter, comprise at least one resonant cavity, be contained in input and output on the described resonant cavity two side, described intra resonant cavity is placed with at least one super sheet of material, each super sheet of material comprises the nonmetallic materials substrate of making and the artificial micro-structural that is attached on the substrate surface, the structure with geometrical pattern that the silk thread that described artificial micro-structural is electric conducting material is formed.
In filter of the present invention, described super sheet of material has a plurality of, and all super sheet of material arrange at interval in parallel to each other or the surface links into an integrated entity in contact.
In filter of the present invention, be provided with bearing in the described resonant cavity, described super sheet of material is fixed on the described bearing.
In filter of the present invention, described bearing is to be made by electromagnetic wave transparent material.
In filter of the present invention, described artificial micro-structural is the I-shaped or I-shaped shape of deriving.
In filter of the present invention, described artificial micro-structural is cross or the criss-cross shape of deriving.
In filter of the present invention, the described criss-cross shape of deriving has four identical branch roads, and arbitrary branch road is that pivot revolves successively and turn 90 degrees, overlaps respectively at other three branch roads successively behind 180 degree, 270 degree with a bit.
In filter of the present invention, three branch roads of each branch road one end and other end points altogether are connected, and the other end is free end, is provided with at least one kink between the two ends.
In filter of the present invention, the free end of described branch road is connected with a line segment.
In filter of the present invention, the material of described substrate is pottery, polytetrafluoroethylene, epoxy resin, ferroelectric material, ferrite material, ferromagnetic material or FR-4 material.
Implement filter of the present invention, has following beneficial effect: adopt filter of the present invention, after it adds excess of imports sheet of material, a plurality of resonance frequencys can be drawn in, cause the bandwidth of single resonant cavity to broaden, thereby can bear powerful filter, and also be single chamber high power filter, therefore can realize the miniaturization of filter.
Description of drawings
The invention will be further described below in conjunction with drawings and Examples, in the accompanying drawing:
Fig. 1 is the Filter Structures schematic diagram of the preferred embodiment of the present invention;
Fig. 2 is the structural representation of the super sheet of material of filter shown in Figure 1;
Fig. 3 is that artificial micro-structural is the structural representation of the I-shaped shape of deriving;
Fig. 4 is that artificial micro-structural is the structural representation of the criss-cross shape of deriving;
Fig. 5 to Fig. 8 is that artificial micro-structural is the structural representation of other four kinds of criss-cross shapes of deriving.
Embodiment
The present invention relates to a kind of filter, mainly refer to microwave filter, as shown in Figure 1, its inside is at least one resonant cavity 8, and input and output are equipped with in the both sides of resonant cavity 8.The medium that the present invention fills in resonant cavity 8 is super material, and super material can increase the bandwidth of resonant cavity, thereby reduces the number of filter cavity, and then realizes the miniaturization of filter.
As shown in Figure 1, super material comprises at least one super sheet of material 1.When super sheet of material 1 has one, it directly can be fixed in the resonant cavity 8.When super sheet of material 1 has when a plurality of, a plurality of super sheet of material 1 surface is bonding being integral in contact, also can adjacent two surpass place between the sheet of material 1 electromagnetic wave transparent material for example foam they are separated.Can place bearing in the resonant cavity 8, slot is set on the bearing, the integral body that a plurality of super sheet of material 1 constitute is inserted in the slot, thereby make their placements that is parallel to each other.Electromagnetic wave transparent materials such as bearing preferred foams plastics.Totally 14 of super sheet of material 1 shown in the figure, it is bonded together mutually, and input and output are against respectively on the both side surface of super sheet of material 1.Certainly, input can not contact with super sheet of material with output yet.
Super sheet of material 1 comprises flat substrate 3 and is attached to substrate 3 lip-deep artificial micro-structurals 2.Wherein, substrate 3 is made by nonmetallic materials, as polytetrafluoroethylene, epoxy resin, pottery, ferroelectric material, ferrite material, ferromagnetic material, FR-4 material etc.The structure of certain geometrical pattern that artificial micro-structural 2 is formed on substrate 3 surfaces at least one rhizoid line, for example " worker " font, split ring resonator shape etc.The silk thread of artificial micro-structural 2 is made by electric conducting material, is generally metal as silver, copper etc., also can make with other nonmetallic electric conducting materials such as ITO.The live width of these silk threads is preferably for example 0.1mm of machinable minimum feature in 1mm; The very thin thickness of silk thread is generally the thickness of coating, among the present invention usually less than 0.1mm, 0.018mm for example.
The geometrical pattern of artificial micro-structural 2 has a variety of situations, and is known to I-shaped, and it comprises straight first metal wire 201 and is connected first metal wire, 201 two ends and by first metal wire, 201 vertical two of dividing equally, second metal wires 202; I-shaped artificial micro-structural like this can also further be derived, obtain the I-shaped shape of deriving, as shown in Figure 3, it is except first, second metal wire, also comprise the 4th metal wire 204 that is connected to every second metal wire, 202 two ends and the 3rd metal wire of vertically being divided equally by second metal wire 202 203, is connected to every the 3rd metal wire 203 two ends and is vertically divided equally by the 3rd metal wire 203, the rest may be inferred, continues to derive.
Equally, artificial micro-structural 2 of the present invention can also be the criss-cross shape of deriving, it comprises that two vertically and are mutually divided equally criss-cross first metal wire 201 of formation, also comprise second metal wire 202 that is connected to every first metal wire, 201 two ends and is vertically divided equally by first metal wire 201, formation derive shape as shown in Figure 2; Further, when artificial micro-structural except first, second metal wire, also can comprise the 3rd metal wire 203 that is connected to every second metal wire, 202 two ends and is vertically divided equally by second metal wire 202, and the 4th metal wire 204 that is connected to every the 3rd metal wire 203 two ends and is vertically divided equally by every the 3rd metal wire 203, 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 shapes of deriving, artificial micro-structural 2 comprises four identical branch roads 210, and arbitrary branch road 210 is that pivot revolves successively and turn 90 degrees, overlaps respectively at other three branch roads 210 successively behind 180 degree, 270 degree with a bit.Therefore, so artificial micro-structural 2 is isotropic structure, and it is all identical to electromagnetic response characteristic on all directions on the plane at place, the characteristic so the above-mentioned artificial micro-structural of the criss-cross shape of deriving as Fig. 2, Fig. 4 also has.Certainly, in above-described embodiment, thereby four branch roads 210 totally one end points connect as one.
To shown in Figure 8, three branch roads of each branch road 210 1 end and other 210 end points altogether are connected as Fig. 5, and the other end is free end, is provided with at least one kink between the two ends.The kink here can be rolled over for quarter bend, as shown in Figure 5, also can be that wedge angle bends as Fig. 6, shown in Figure 7, can also be the fillet bending, as shown in Figure 8.Free-ended outside also can be connected with straightway, as Fig. 7, shown in Figure 8, is preferably free-ended end points and is connected with the mid point of this line segment.
Because the existence of the artificial micro-structural 2 that electric conducting material is made, reduce resonance frequency, and produced two resonance frequencys of closing on very much, finally caused resonant cavity to have bigger bandwidth, therefore single resonant cavity just can bear powerful filter, thereby makes the filter miniaturization become possibility.
For example, resonant cavity shown in Figure 1 is the cube of 20mm * 20mm * 20mm, super sheet of material is 7mm * 5.6mm * 1.018mm, have 6 super sheet of material altogether, substrate is FR-4 epoxy resin, and thickness is 1mm, and each artificial micro-structural is the criss-cross shape of deriving as shown in Figure 1 and Figure 2, it is of a size of 1.4mm * 1.4mm, and array is placed with 20 artificial micro-structurals on the every substrate.By emulation as can be known, first, second resonance frequency is 0, the three, the 4th resonance frequency is respectively 3.810GHz, 3.861GHz, and the two is formed and surpasses the bandwidth of 50MHz at least.And in same resonant cavity, do not place super sheet of material, and first resonance frequency is 6.100GHz, second resonance frequency is 8.360GHz, the 3rd resonance frequency is 9.938GHz, the 4th resonance frequency is 9.938GHz, and first, second resonance frequency differs by more than 2GHz, can't form broadband.In addition, a lot of different moulds are arranged in the resonant cavity, corresponding different resonance frequency, adopt embodiments of the invention, first, second resonance frequency is 0, shows that low-order mode is suppressed, high-rder mode is excited, and more then the Q value is more high for high-rder mode, and the Q value is high to mean that the loss of resonant cavity is little.This also is one of advantage of the present invention.
This shows, adopt filter of the present invention, after it adds excess of imports sheet of material 1, a plurality of resonance frequencys can be drawn in, causing the bandwidth of single resonant cavity to broaden, thereby can bear powerful filter, also is single chamber high power filter, therefore can realize the miniaturization of filter, also have simultaneously and suppress the advantage that low-order mode reduces the wastage.
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 is under enlightenment of the present invention; not breaking away under the scope situation that aim of the present invention and claim protect, also can make a lot of forms, these all belong within the protection of the present invention.
Claims (10)
1. filter, comprise at least one resonant cavity, be contained in input and output on the described resonant cavity two side, it is characterized in that, described intra resonant cavity is placed with at least one super sheet of material, each super sheet of material comprises the nonmetallic materials substrate of making and the artificial micro-structural that is attached on the substrate surface, the structure with geometrical pattern that the silk thread that described artificial micro-structural is electric conducting material is formed.
2. filter according to claim 1 is characterized in that, described super sheet of material has a plurality of, and all super sheet of material arrange at interval in parallel to each other or the surface links into an integrated entity in contact.
3. filter according to claim 2 is characterized in that, is provided with bearing in the described resonant cavity, and described super sheet of material is fixed on the described bearing.
4. filter according to claim 3 is characterized in that, described bearing is made by electromagnetic wave transparent material.
5. filter according to claim 1 is characterized in that, described artificial micro-structural is the I-shaped or I-shaped shape of deriving.
6. filter according to claim 1 is characterized in that, described artificial micro-structural is cross or the criss-cross shape of deriving.
7. filter according to claim 6 is characterized in that, the described criss-cross shape of deriving has four identical branch roads, and arbitrary branch road is that pivot revolves successively and turn 90 degrees, overlaps respectively at other three branch roads successively behind 180 degree, 270 degree with a bit.
8. filter according to claim 7 is characterized in that, three branch roads of each branch road one end and other end points altogether are connected, and the other end is free end, is provided with at least one kink between the two ends.
9. filter according to claim 8 is characterized in that, the free end of described branch road is connected with a line segment.
10. filter according to claim 1 is characterized in that, the material of described substrate is pottery, polytetrafluoroethylene, 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 true CN103187604A (en) | 2013-07-03 |
| CN103187604B CN103187604B (en) | 2016-12-14 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104934705A (en) * | 2014-03-18 | 2015-09-23 | 深圳光启创新技术有限公司 | Bandpass filter metamaterial, antenna cover and antenna system |
| CN107968240A (en) * | 2017-12-29 | 2018-04-27 | 苏州大学 | A kind of adjustable plasma photon crystal frequency-selecting filter |
| WO2019165874A1 (en) * | 2018-03-01 | 2019-09-06 | 雄安华讯方舟科技有限公司 | Terahertz bandstop filter |
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 |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104934705A (en) * | 2014-03-18 | 2015-09-23 | 深圳光启创新技术有限公司 | Bandpass filter metamaterial, antenna cover and antenna system |
| CN104934705B (en) * | 2014-03-18 | 2024-02-02 | 深圳光启高等理工研究院 | Bandpass filtering metamaterial, radome and antenna system |
| CN107968240A (en) * | 2017-12-29 | 2018-04-27 | 苏州大学 | A kind of adjustable plasma photon crystal frequency-selecting filter |
| WO2019165874A1 (en) * | 2018-03-01 | 2019-09-06 | 雄安华讯方舟科技有限公司 | Terahertz bandstop filter |
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