CN103296369A - Resonance cavity - Google Patents
Resonance cavity Download PDFInfo
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- CN103296369A CN103296369A CN2012100501650A CN201210050165A CN103296369A CN 103296369 A CN103296369 A CN 103296369A CN 2012100501650 A CN2012100501650 A CN 2012100501650A CN 201210050165 A CN201210050165 A CN 201210050165A CN 103296369 A CN103296369 A CN 103296369A
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Abstract
The invention relates to a resonance cavity which comprises a shell body provided with an inner cavity. Patch antennas are connected to two opposite side walls of the inner cavity respectively. A metamaterial block is arranged between the two patch antennas and comprises at least one metamaterial sheet layer. Each metamaterial sheet layer comprises a substrate and multiple manmade microstructures which are arranged on the substrate periodically. The manmade microstructures are of geometric structures composed of wires made of conductive materials. A resonance frequency of the resonance cavity can be reduced by arranging the metamaterial block with a high dielectric constant. Coupling performance can be improved by arranging the patch antennas between inputting and outputting in a coupling mode, and thus, signals can be conducted into the cavity from the input end with high efficiency and conducted out from the output end with high efficiency. Thus, performances of a filter are improved.
Description
Technical field
The present invention relates to the communications field, more particularly, relate to a kind of resonant cavity.
Background technology
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.Resonant cavity is equipped with in filter inside, 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 it is more high that the resonant cavity volume reduces resonance frequency, 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.
By super material is set in resonant cavity, utilize the high index of refraction of super material, the characteristic of high-k, can under the condition of the volume that does not change resonant cavity, effectively reduce the resonance frequency of resonant cavity, also namely be equivalent to realize under the identical resonance frequency reducing the volume of resonant cavity.But experiment shows, the input of super material and resonant cavity, the coupling effect of output are very poor, cause signal importing, to derive efficient very low, greatly influenced the effect of super material in resonant cavity.
Summary of the invention
The technical problem to be solved in the present invention is, the defective at the coupling effect difference of the above-mentioned super material of prior art and resonant cavity provides the resonant cavity that a kind of coupling effect is good, the signal conduction efficiency is high.
The technical solution adopted for the present invention to solve the technical problems is: construct a kind of resonant cavity, comprise the housing with inner chamber, respectively be connected with a paster antenna on the two side in opposite directions of described inner chamber, between described two paster antennas, also be provided with super material block, described super material block comprises at least one super sheet of material, each described super sheet of material comprises substrate and is attached on the described substrate a plurality of artificial micro-structural of periodically arranging, and the silk thread that described artificial micro-structural is electric conducting material is formed has geometric structure.
In resonant cavity of the present invention, described paster antenna is circular polarized antenna, comprises the sheet metal that attaches on dielectric-slab that nonmetallic materials are made and the described dielectric-slab.
In resonant cavity of the present invention, described sheet metal be positioned at described dielectric-slab on a side surface of enclosure interior.
In resonant cavity of the present invention, described sheet metal is rectangular metal sheet, and offers the groove that extends to the central point of rectangle on four angles of described rectangular metal sheet respectively.
In resonant cavity of the present invention, the sidewall wall of described dielectric-slab and described inner chamber is fitted, and makes described housing become the earth terminal of described paster antenna.
In resonant cavity of the present invention, metal clad sheet of described dielectric-slab, another side is provided with coaxial line, and described coaxial line passes described dielectric-slab and is electrically connected with described sheet metal, and described resonant cavity is respectively input, output with the coaxial line of described two paster antennas.
In resonant cavity of the present invention, described super sheet of material is perpendicular to described paster antenna, and described super material block is positioned at the housing middle.
In resonant cavity of the present invention, described sheet metal is circle, annular, rectangle, the rectangle that cuts at least one angle or triangle.
In resonant cavity of the present invention, the dielectric-slab of described paster antenna, the material of the sheet metal material with the substrate of described super sheet of material, artificial micro-structural respectively are identical.
In resonant cavity of the present invention, the frequency of described paster antenna is suitable with the resonance frequency of described super material block.
Implement resonant cavity of the present invention, have following beneficial effect: adopt resonant cavity of the present invention, have the super material block of high-k by setting, can reduce the resonance frequency of resonant cavity; By coupled patch between input, output, can improve coupling performance, thereby with signal expeditiously in the input introduction chamber,, and then improve the performance of filter again signal expeditiously from output everywhere.
Description of drawings
The invention will be further described below in conjunction with drawings and Examples, in the accompanying drawing:
Fig. 1 is the structural representation of the resonant cavity of the preferred embodiment of the present invention;
Fig. 2 is the front view of the sheet metal of paster antenna among Fig. 1;
Fig. 3 is the front view of the sheet metal of another embodiment;
Fig. 4 is the S11 analogous diagram of the paster antenna among Fig. 1;
Fig. 5 is the analogous diagram of resonant cavity shown in Figure 1.
Embodiment
The present invention relates to a kind of resonant cavity, as shown in Figure 1, comprise housing, input, output, super material block and paster antenna.
As shown in Figure 1, super material block is positioned at the middle of housing inner chamber 1 by the stent support (not shown), it comprises at least one super sheet of material, when super sheet of material has when a plurality of, their front and rear surfaces are fixedly attached to together with modes such as machinery or physics fusions with fitting, and also can turn up the soil at interval at a certain distance each other links into an integrated entity.Each super sheet of material perpendicular to paster antenna put.Super sheet of material be by substrate 4 be attached to substrate 4 on become a plurality of artificial micro-structural 5 of periodically arranging to constitute.Wherein, substrate 4 is used for being made by nonmetallic materials usually, for example FR-4 material, polytetrafluoroethylene, epoxy resin, pottery or SiO at the bottom of artificial micro-structural 5 provides adherance
2The structure with certain geometrical shape that 5 silk threads of being made by electric conducting material of artificial micro-structural are formed, for example " worker " font, " ten " font, split ring resonator shape etc.The electric conducting material here is generally copper, silver, indium tin oxide etc.
Among the present invention, utilize the characteristic of the high-k of super material to reduce the resonance frequency of resonant cavity, therefore, the design of artificial micro-structural 5 wants to realize the requirement of high-k.At first, artificial micro-structural 5 is of a size of about 1/5th to 1/10th of the corresponding electromagnetic wavelength of resonance frequency, is preferably 1/10th.When artificial micro-structural 5 is arranged into a rectangular array, also can be understood as the line space of arrangement and column pitch at about 1/10th of this wavelength, and the size of artificial micro-structural 5 satisfies this artificial micro-structural 5 can be contained in line space and column pitch serves as in the long and wide rectangular grid, and the edge that the maximum outline of artificial micro-structural 5 can approach to this rectangular grid also namely takes grid substantially.As for the concrete size of artificial micro-structural 5, can constantly adjust among a small circle according to simulation result, satisfy the requirement of resonant cavity up to resonance frequency.
In addition, in resonant cavity, put into super material block, can reduce resonance frequency, but for the frequency reducing effect more obvious, the geometry of artificial micro-structural 5 can be selected the tangible planform of electric field response, " worker " font for example comprises straight first metal wire and is connected to the first metal wire two ends and perpendicular to two second metal wires of first metal wire; Further derive, artificial micro-structural 5 can be connected the every second metal wire two ends and perpendicular to four the 3rd metal wires of second metal wire for comprising on I-shaped basis, can also comprise being connected to every the 3rd metal wire two ends and perpendicular to eight the 4th metal wires of the 3rd metal wire.By that analogy, infinite derived structure can also be arranged.
Equally, the artificial micro-structural 5 of super material block of the present invention can also be deriving of " ten " font, comprise mutual vertical two first metal wires that constitute " ten " word and be connected to the every first metal wire two ends and perpendicular to four second metal wires of first metal wire that is connected, as shown in Figure 1; Further derive, artificial micro-structural 5 can also comprise on the basis of deriving of above-mentioned " ten " font and be connected the every second metal wire two ends and perpendicular to eight the 3rd metal wires of second metal wire that connects, and also can comprise being connected to every the 3rd metal wire two ends and perpendicular to ten six roots of sensation the 4th metal wire of the 3rd metal wire.Further, by that analogy, can obtain infinite derived structure.
Certainly, the artificial micro-structural 5 of other shapes can make that also super sheet of material has the effect of high index of refraction, thereby realizes the frequency reducing purpose of resonant cavity.Therefore, artificial micro-structural 5 of the present invention is not limited in the said structure form.
Because super material block and input, output belong to diverse medium, if therefore the both sides of super material block directly with import, export and be coupled, coupling performance and effect are poor.In order to improve coupling performance, the present invention is equipped with paster antenna between super material block and input, output, as shown in Figure 1.
Paster antenna of the present invention is circular polarized antenna, adopts any circular polarized antenna of prior art all can.As shown in Figure 1 and Figure 2, paster antenna of the present invention comprises dielectric-slab 2, is attached to the sheet metal 3 on dielectric-slab 2 one side and is installed in the coaxial line 6 of dielectric-slab 2 another sides.The one side that dielectric-slab 2 is provided with coaxial line 6 contacts applying with inner chamber 1 sidewall, thereby makes housing as the ground plane of paster antenna.Two coaxial lines 6 are connected with outside input, output signal as input, output respectively.The sheet metal 3 of present embodiment cuts the shape that a dihedral becomes for rectangle, can certainly be the shape of the used metal patch of other circular polarized antennas commonly used as shown in Figure 3 four jiaos of fluting shapes for example.Certainly, paster antenna of the present invention also can adopt linear polarized antenna except circular polarized antenna.
In order to improve coupling performance, dielectric-slab 2 can adopt with substrate 4 identical materials of super sheet of material and make, and for example all adopts FR-4 material or polytetrafluoroethylene.Equally, sheet metal 3 also can adopt identical electric conducting material to make with artificial micro-structural 5, for example all adopts copper.Simultaneously, the frequency of the paster antenna preferably resonance frequency with super material block is suitable, and for example frequency is all on the order of magnitude or on the consecutive number magnitude.The paster antenna of sheet can directly contact connection as super material block side surface, also can not contact but the distance very near.
Adopt resonant cavity of the present invention, have the super material block of high-k by setting, can reduce resonance frequency; By coupled patch between input, output, can improve coupling performance, thereby with signal expeditiously in the input introduction chamber,, and then improve the performance of filter again signal expeditiously from output everywhere.
For example, in the present embodiment, getting inner chamber is the resonant cavity cavity of 20mm * 20mm * 20mm, and its resonance frequency is 10.59GHz;
Super material block is put in the middle in above-mentioned cavity, and this super material block comprises 9 super sheet of material, and the substrate size of each lamella is 10mm * 10mm * 1mm, and wherein the thickness of substrate is 1mm; The artificial micro-structural that each super sheet of material surface attachment has 5 * 5 matrixes to arrange, each micro-structural is shape as shown in Figure 1, substrate is FR-4, artificial micro-structural is copper cash, record the resonant cavity with this super material block, its resonance frequency is 2.132GHz, is 3.24dB in the loss of resonance frequency, has therefore reduced 8.458GHz with respect to the cavity resonance frequency;
Further, super material block both sides two in cavity wall as shown in Figure 1 paster antenna is set, the resonance frequency of paster antenna is illustrated in figure 4 as 2.165GHz, and the resonant cavity of adding paster antenna and super material block, as shown in Figure 5, its resonance frequency is 2.17GHz, and the loss of resonance frequency is 0.18dB; This shows that behind the adding paster antenna, resonance frequency is constant substantially, and loss has reduced 3.06dB.
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. resonant cavity, comprise the housing with inner chamber, it is characterized in that, respectively be connected with a paster antenna on the two side in opposite directions of described inner chamber, between described two paster antennas, also be provided with super material block, described super material block comprises at least one super sheet of material, and each described super sheet of material comprises substrate and be attached on the described substrate a plurality of artificial micro-structural of periodically arranging, and the silk thread that described artificial micro-structural is electric conducting material is formed has geometric structure.
2. resonant cavity according to claim 1 is characterized in that, described paster antenna is circular polarized antenna, comprises the sheet metal that attaches on dielectric-slab that nonmetallic materials are made and the described dielectric-slab.
3. resonant cavity according to claim 2 is characterized in that, described sheet metal be positioned at described dielectric-slab on a side surface of enclosure interior.
4. resonant cavity according to claim 2 is characterized in that, described sheet metal is rectangular metal sheet, and offers the groove that extends to the central point of rectangle on four angles of described rectangular metal sheet respectively.
5. resonant cavity according to claim 2 is characterized in that, the sidewall wall of described dielectric-slab and described inner chamber is fitted, and makes described housing become the earth terminal of described paster antenna.
6. resonant cavity according to claim 2, it is characterized in that, metal clad sheet of described dielectric-slab, another side is provided with coaxial line, described coaxial line passes described dielectric-slab and is electrically connected with described sheet metal, and described resonant cavity is respectively input, output with the coaxial line of described two paster antennas.
7. the resonant cavity of stating according to claim 2 is characterized in that, described super sheet of material is perpendicular to described paster antenna, and described super material block is positioned at the housing middle.
8. resonant cavity according to claim 2 is characterized in that, described sheet metal is circle, annular, rectangle, the rectangle that cuts at least one angle or triangle.
9. resonant cavity according to claim 2 is characterized in that, the dielectric-slab of described paster antenna, the material of the sheet metal material with the substrate of described super sheet of material, artificial micro-structural respectively are identical.
10. resonant cavity according to claim 1 is characterized in that, the frequency of described paster antenna is suitable with the resonance frequency of described super material block.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201210050165.0A CN103296369B (en) | 2012-02-29 | 2012-02-29 | Resonance cavity |
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| CN201210050165.0A CN103296369B (en) | 2012-02-29 | 2012-02-29 | Resonance cavity |
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| CN103296369A true CN103296369A (en) | 2013-09-11 |
| CN103296369B CN103296369B (en) | 2017-03-22 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105762530A (en) * | 2016-03-31 | 2016-07-13 | 深圳超级数据链技术有限公司 | Polarizer and resonant cavity |
| CN114899614A (en) * | 2022-05-11 | 2022-08-12 | 西南交通大学 | Metamaterial dual-frequency filtering antenna |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1945899A (en) * | 2006-10-26 | 2007-04-11 | 浙江大学 | Micro strip antenna |
| US7337528B2 (en) * | 2004-12-23 | 2008-03-04 | Motorola, Inc. | Textured dielectric patch antenna fabrication method |
| CN101626110A (en) * | 2008-07-11 | 2010-01-13 | 西北工业大学 | Novel C-band microstrip antenna with negative permeability material |
| CN101794934A (en) * | 2009-01-08 | 2010-08-04 | 奥迪康有限公司 | Miniature patch antenna |
-
2012
- 2012-02-29 CN CN201210050165.0A patent/CN103296369B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7337528B2 (en) * | 2004-12-23 | 2008-03-04 | Motorola, Inc. | Textured dielectric patch antenna fabrication method |
| CN1945899A (en) * | 2006-10-26 | 2007-04-11 | 浙江大学 | Micro strip antenna |
| CN101626110A (en) * | 2008-07-11 | 2010-01-13 | 西北工业大学 | Novel C-band microstrip antenna with negative permeability material |
| CN101794934A (en) * | 2009-01-08 | 2010-08-04 | 奥迪康有限公司 | Miniature patch antenna |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105762530A (en) * | 2016-03-31 | 2016-07-13 | 深圳超级数据链技术有限公司 | Polarizer and resonant cavity |
| CN114899614A (en) * | 2022-05-11 | 2022-08-12 | 西南交通大学 | Metamaterial dual-frequency filtering antenna |
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| Publication number | Publication date |
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| CN103296369B (en) | 2017-03-22 |
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Effective date of registration: 20210420 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. |