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WO2013037173A1 - Cavité résonnante et filtre comportant celle-ci - Google Patents

Cavité résonnante et filtre comportant celle-ci Download PDF

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Publication number
WO2013037173A1
WO2013037173A1 PCT/CN2011/083898 CN2011083898W WO2013037173A1 WO 2013037173 A1 WO2013037173 A1 WO 2013037173A1 CN 2011083898 W CN2011083898 W CN 2011083898W WO 2013037173 A1 WO2013037173 A1 WO 2013037173A1
Authority
WO
WIPO (PCT)
Prior art keywords
resonant cavity
artificial microstructure
artificial
cavity according
metal
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/CN2011/083898
Other languages
English (en)
Chinese (zh)
Inventor
刘若鹏
栾琳
刘京京
苏翠
李平军
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Kuang-Chi Institute of Advanced Technology
Kuang Chi Innovative Technology Ltd
Original Assignee
Kuang-Chi Institute of Advanced Technology
Kuang Chi Innovative Technology Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Kuang-Chi Institute of Advanced Technology, Kuang Chi Innovative Technology Ltd filed Critical Kuang-Chi Institute of Advanced Technology
Publication of WO2013037173A1 publication Critical patent/WO2013037173A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01P—WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
    • H01P7/00—Resonators of the waveguide type
    • H01P7/06—Cavity resonators

Definitions

  • the present invention relates to the field of wireless communications, and more particularly to a resonant cavity and a filter having the same. Background technique
  • the cavity filter is composed of a plurality of microwave resonators having the same shape and volume, and each cavity has a cavity of a specific shape surrounded by a conductive wall (or a magnetic conductive wall).
  • a resonant cavity has a fixed resonant frequency, and a plurality of resonant cavities having different resonant frequencies are connected together to form a filter having a bandwidth of a certain width.
  • the filter needs to have a certain bandwidth of band pass or band stop, and it is necessary to have a plurality of resonant cavities, resulting in a large volume defect.
  • the technical problem to be solved by the present invention is to provide a resonant cavity capable of realizing the function of a band rejection filter in view of the above-mentioned drawbacks of the prior art.
  • the invention provides a resonant cavity comprising a cavity and an input end and an output end respectively mounted on side walls of the cavity.
  • the cavity is further provided with at least one metamaterial sheet, each of the super material sheets comprising a non-metal substrate and an artificial microstructure attached to the substrate, the artificial microstructure being composed of a wire composed of a conductive material
  • the structure of the pattern, the artificial microstructures attached to the two sides of each of the metamaterial sheets are respectively electrically connected to the input end and the output end by metal.
  • the artificial microstructures attached to the two sides of each of the metamaterial sheets are respectively short-circuited by metal short-circuiting between the input end and the output end.
  • the metal is in the form of a sheet, and the two side edges are respectively in contact with the artificial microstructure and the input end or the output end.
  • the thickness of the sheet metal is the same as the thickness of the artificial microstructure. Wherein, the thickness of the sheet metal is greater than the thickness of the artificial microstructure.
  • the metal piece is made of copper.
  • the artificial microstructure and the input end and the output end are both made of a conductive material.
  • the plurality of the artificial microstructures are arranged in a rectangular array on the surface of the substrate.
  • the plurality of the artificial microstructures are arranged in an annular array on the surface of the substrate.
  • the plurality of metamaterial sheets have a plurality of layers, and the plurality of metamaterial sheets are laminated in a direction perpendicular to the surface thereof.
  • a plurality of the metamaterial sheets are integrally joined by mechanical connection or bonding.
  • the substrate is made of ceramic, polytetrafluoroethylene, FR-4 material, ferroelectric material, ferromagnetic material or SiO 2 .
  • the artificial microstructure is an isotropic structure having four branches, and any branch is rotated 90 degrees around a center of rotation and then coincides with an adjacent branch.
  • the branch road has a T shape or a derivative shape thereof.
  • the branch is serpentine or spiral.
  • the branch is a mixed shape of two or three of a T-shape, a serpentine shape and a spiral shape.
  • the artificial microstructure is an anisotropic structure.
  • the artificial microstructure comprises five I-shapes, wherein one of the I-shapes is centered, and the remaining four I-shapes are smaller than the centered I-shape, and the remaining four I-shapes are connected to the centered I-shaped Four endpoints.
  • the artificial microstructure comprises two axisymmetric spirals.
  • embodiments of the present invention also provide a filter including at least one of the above-described resonant cavities.
  • FIG. 1 is a schematic structural view of a resonant cavity of a preferred embodiment of the present invention
  • Figure 2 is a perspective view of the resonator shown in Figure 1 when it is placed upside down;
  • Figure 3 is an enlarged view of a portion A of the resonant cavity shown in Figure 2;
  • Figure 4 is a left side elevational view of the cavity of Figure 2;
  • Figure 5 is a simulation effect diagram of the resonant cavity shown in Figures 1 to 3;
  • Figure 6 is a schematic view showing the structure of the artificial microstructure in the form of an I-shaped shape
  • Figure 7 is a schematic view showing the structure when the four branches of the artificial microstructure are T-shaped;
  • Figure 8 is a schematic view showing the structure of the four branches of the artificial microstructure in a serpentine shape;
  • Figure 9 is a schematic view showing the structure of the four branches of the artificial microstructure in a spiral shape
  • Figure 10 is a schematic view showing the structure when the artificial microstructure is anisotropic spiral
  • Figure 11 is a schematic view showing the structure of the artificial microstructure in the form of another anisotropic spiral.
  • the invention relates to a resonant cavity for a filter, the filter comprising at least one of the resonant cavities.
  • the resonant cavity includes a cavity 1, an input end 3 and an output end 4 mounted on side walls of the cavity 1.
  • the cavity 1 has a cavity similar to a cube, and one end is open. The open face is sealed with a chamber cover 2.
  • the innovation of the present invention lies in that a cavity 5 is provided in the cavity 1 and a metal piece 8 connecting the metamaterial layer 5 with the input terminal 3 and the output terminal 4 is provided to realize the effect of the band rejection filter.
  • each of the metamaterial sheets 5 comprises a substrate 6 and at least one artificial microstructure 7 attached to the substrate 6.
  • the substrate 6 is usually made of a non-metallic material such as polytetrafluoroethylene, epoxy resin, FR-4 material, ceramic, ferroelectric material, ferromagnetic material, SiO 2 , and the like. Since its thickness is usually much smaller than its length or width, it is in the form of a sheet.
  • the artificial microstructures 7 are attached to the surface of the sheet substrate 6.
  • the artificial microstructure 7 is a geometrically structured structure composed of wires of a conductive material having a size within one fifth of the wavelength of the electromagnetic wave to be responsive, preferably no more than one tenth.
  • the conductive material here is usually metal such as silver or copper, and other conductive materials. Materials such as ITO (indium tin oxide), graphite, carbon nanotubes, and the like.
  • the geometry of the artificial microstructure 7 can take many forms.
  • the structure shown in Fig. 2 is a structure in which two identical "work"-shaped structures are orthogonal and the intersection point is the midpoint of the middle line connecting the two, which can be regarded as A sigmoid shape is rotated by 90 degrees, 180 degrees, and 270 degrees with the end point of the vertical line as a center of rotation, thereby obtaining four identical branches and a structure composed of the four branches.
  • Any artificial microstructure 7 having such structural characteristics belongs to the isotropic artificial microstructure 7, that is, it has four branches, and any branch is rotated 90 degrees around a center of rotation and coincides with the adjacent branch.
  • the isotropic artificial microstructure 7 has many forms, as shown in Figure 7, Figure 8, and Figure 9.
  • Each branch of the artificial microstructure 7 shown in FIG. 7 has a U-shaped derivative shape, and is connected with other structures at both ends of the U-shaped horizontal line.
  • an I-shaped structure is connected, and of course, it can also be connected. Any other shape such as a ring, a curve, a fold line extending toward the center of rotation, and the like.
  • the artificial microstructure 7 shown in Fig. 8 has a serpentine shape for each branch, that is, a reciprocating bending of a line segment.
  • the branch can also be a serpentine derivative, that is, at the end of the serpentine branch. Connect line segments, curves, and more.
  • the artificial microstructure 7 shown in Fig. 9 has a spiral shape, that is, a trajectory formed by displacing from the inside to the outside while being wound around the inside, in this example, a triangular spiral, or a rectangular spiral or a circular spiral.
  • the end of the spiral can also be derived by connecting wired segments, curves, and the like.
  • each branch may also be a combination of two or three of a U-shape, a serpentine shape and a spiral shape.
  • each branch may have any shape as long as it is composed of four identical The branch is composed and conforms to the characteristics of isotropic.
  • the artificial microstructure 7 which does not satisfy the isotropic characteristics, i.e., the anisotropic artificial microstructure 7, is also applicable in the present invention.
  • the structure shown in Fig. 6 consisting of a large I-shape and four small I-shaped shapes connected at the four end points of the large I-shape is anisotropy.
  • Figures 10 and 11 show two helical anisotropic structures, and such artificial microstructures 7 can also be used in the present invention.
  • each wire represents a conductive material wire, and the wire has a certain line width and thickness, which are not shown in the drawing.
  • the metal piece 8 and the metal piece 8 may be made of any electrically conductive metal material.
  • the material is preferably the same as the metal material of the artificial microstructure 7, the input end 3, and the end of the output end 4, for example, all of copper.
  • the metal sheet 8 serves to short-circuit the artificial microstructure 7 on both sides of the super-material sheet 5 to the input terminal 3/output terminal 4.
  • the thickness of the metal sheet 8 can be made comparable to the thickness of the artificial microstructure 7, of course, in order to enhance the stability, The thickness of the metal sheet 8 can be relatively large.
  • the simulation parameters include:
  • the resonant cavity is copper, the internal dimension of the cavity 1 is 20mm 20mm 20mm, the input end 3, the output end 4 extends into the resonant cavity
  • the inner end is made of copper rod, the length is 3.5mm, the diameter is 2mm;
  • the super material sheet 5 is five pieces, the total thickness is 0.49mm, the length and the width are all 10mm, which is located in the middle of the cavity;
  • the substrate 6 is FR -4 material, thickness 0.4mm;
  • artificial microstructure 7 has the shape of four T-shaped isotropic structures as shown in Figure 2, length and width are 0.8mm, made of copper wire, line width 0.1mm,
  • the artificial microstructures 7 are arranged in an array of 10 x 10 matrices on the surface of the substrate 6 at a line pitch of 1 mm and a column pitch of 1 mm;
  • the metal sheets 8 are copper sheets, 1.6 mm wide and 10 mm long, so that a row of artificial microstructures

Landscapes

  • Control Of Motors That Do Not Use Commutators (AREA)

Abstract

L'invention concerne une cavité résonnante comprenant un corps de cavité et une extrémité d'entrée et une extrémité de sortie situées respectivement sur deux parois latérales du corps de cavité. L'intérieur du corps de cavité est muni d'au moins une feuille de métamatériau, chaque feuille de métamatériau comportant un substrat non métallique et une microstructure artificielle fixée au substrat. La microstructure artificielle, qui présente une structure dont la figure géométrique est formée par les fils d'un matériau conducteur, est fixée au bord de chaque côté de chaque feuille de métamatériau et raccordée électriquement à l'extrémité d'entrée et à l'extrémité de sortie, respectivement, par le biais d'un métal. L'application de la présente invention permet d'obtenir les fonctions d'un filtre coupe-bande en n'utilisant qu'une seule cavité résonnante. On décrit en outre un filtre comportant ladite cavité résonnante.
PCT/CN2011/083898 2011-09-16 2011-12-13 Cavité résonnante et filtre comportant celle-ci Ceased WO2013037173A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN201110275322.3 2011-09-16
CN201110275322.3A CN103000980B (zh) 2011-09-16 2011-09-16 一种谐振腔

Publications (1)

Publication Number Publication Date
WO2013037173A1 true WO2013037173A1 (fr) 2013-03-21

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PCT/CN2011/083898 Ceased WO2013037173A1 (fr) 2011-09-16 2011-12-13 Cavité résonnante et filtre comportant celle-ci

Country Status (2)

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CN (1) CN103000980B (fr)
WO (1) WO2013037173A1 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106602188B (zh) * 2017-01-16 2019-10-18 华南理工大学 一种基于多层开槽介质板堆叠的环形腔体滤波器
CN106602189B (zh) * 2017-01-16 2020-04-28 华南理工大学 一种环形金属谐振腔波导滤波器

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2008028964A (ja) * 2006-06-22 2008-02-07 Yamaguchi Univ ストリップ線路型左手系線路
CN101150217A (zh) * 2007-11-02 2008-03-26 清华大学 基于铁电陶瓷颗粒的电场可调谐负磁导率器件及制备方法
JP2008182598A (ja) * 2007-01-25 2008-08-07 Murata Mfg Co Ltd 左手系伝送線路、ハイパスフィルタおよび通信装置
CN101989675A (zh) * 2009-08-04 2011-03-23 株式会社多摩川电子 半同轴谐振器及滤波器装置

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1787280A (zh) * 2004-12-09 2006-06-14 上海方盛信息科技有限责任公司 一种电磁禁带结构材料
US8228129B2 (en) * 2008-11-06 2012-07-24 Raytheon Company Photonic crystal resonant defect cavities with nano-scale oscillators for generation of terahertz or infrared radiation
CN202275917U (zh) * 2011-09-16 2012-06-13 深圳光启高等理工研究院 一种谐振腔

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2008028964A (ja) * 2006-06-22 2008-02-07 Yamaguchi Univ ストリップ線路型左手系線路
JP2008182598A (ja) * 2007-01-25 2008-08-07 Murata Mfg Co Ltd 左手系伝送線路、ハイパスフィルタおよび通信装置
CN101150217A (zh) * 2007-11-02 2008-03-26 清华大学 基于铁电陶瓷颗粒的电场可调谐负磁导率器件及制备方法
CN101989675A (zh) * 2009-08-04 2011-03-23 株式会社多摩川电子 半同轴谐振器及滤波器装置

Also Published As

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CN103000980B (zh) 2015-06-03
CN103000980A (zh) 2013-03-27

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