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WO2013023424A1 - Cavité résonante et filtre d'ondes à cavité résonante - Google Patents

Cavité résonante et filtre d'ondes à cavité résonante Download PDF

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Publication number
WO2013023424A1
WO2013023424A1 PCT/CN2011/083993 CN2011083993W WO2013023424A1 WO 2013023424 A1 WO2013023424 A1 WO 2013023424A1 CN 2011083993 W CN2011083993 W CN 2011083993W WO 2013023424 A1 WO2013023424 A1 WO 2013023424A1
Authority
WO
WIPO (PCT)
Prior art keywords
resonant cavity
metamaterial
cavity according
metal
substrate
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/CN2011/083993
Other languages
English (en)
Chinese (zh)
Inventor
刘若鹏
栾琳
刘京京
苏翠
付少丽
许宁
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 WO2013023424A1 publication Critical patent/WO2013023424A1/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
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01P—WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
    • H01P1/00—Auxiliary devices
    • H01P1/20—Frequency-selective devices, e.g. filters
    • H01P1/207—Hollow waveguide filters

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 several microwave resonators, each cavity having an arbitrary shape of a cavity 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, which requires multiple resonant cavities, resulting in bulky defects.
  • the technical problem to be solved by the present invention is that the above-mentioned plurality of resonant cavities of the prior art can realize the defects of the filter function, and provide a resonant cavity in which a single resonant cavity can realize the function of the filter.
  • the invention provides a resonant cavity, comprising a cavity, a metal plate mounted inside the cavity to divide the cavity into two closed chambers, respectively mounted on two side walls of the cavity to respectively extend Into the input end and the output end of the two chambers, the input end and the output end are opposite to each other, wherein the two chambers are each placed with a metamaterial board, and the metamaterial board comprises a non-metal substrate and At least one artificial microstructure attached to the substrate, each artificial microstructure being a planar planar or three-dimensional structure composed of wires of a conductive material.
  • a metal connecting rod is inserted through the metal plate, and an axis of the connecting rod is arranged in line with a line connecting the output end of the input end, and two ends thereof respectively extend into the two chambers.
  • each of the metamaterial blocks is sandwiched between the input end or the output end and the corresponding connection dry end portion to be overhead.
  • the support of the bottom of each of the metamaterial sheets with the wave-transparent material is supported.
  • the connecting rod is insulated from the metal plate.
  • the connecting rod and the metal plate are insulated by an insulating sleeve.
  • the connecting rod is a copper rod.
  • the metal plate is made of a copper plate.
  • the portion of the input end and the output end that protrude into the chamber is a copper rod.
  • the metamaterial sheet comprises at least one metamaterial sheet, each of the metamaterial sheets comprising a substrate and an artificial microstructure periodically arranged on the substrate.
  • the substrate is made of ceramic, polytetrafluoroethylene, FR-4 material, ferroelectric material, ferromagnetic material or SiO 2 .
  • the metamaterial board comprises a plurality of metamaterial sheets, the adjacent two metamaterial sheets are connected by mechanical or adhesive means, or after the liquid substrate material is poured between the two metamaterial sheets Solidify and fuse the two together.
  • the artificial microstructure is an I-shaped or a cross-shaped derivative formed by a wire.
  • the cross-shaped derivative has four identical branches, and any of the branches is rotated by 90 degrees, 180 degrees, and 270 degrees with one point as a center of rotation, and then coincides with the other three branches.
  • each branch is connected to the other three branches at the same end, and the other end is a free end, and at least one bent portion is disposed between the two ends.
  • the bent portion is a right angle bend, a sharp corner bend or a round corner bend.
  • the free end is connected with a straight line segment or a curved line.
  • the artificial microstructure is an I-shape composed of a wire, which comprises a first metal wire in a straight line and two second metal wires connected at two ends of the first metal wire and vertically divided by the first metal wire.
  • the artificial microstructure is a structure in which a wire is spirally wound.
  • embodiments of the present invention also provide a filter including at least one of the above-described resonant cavities.
  • the implementation of the resonant cavity of the present invention has the following advantageous effects: With the structure of the present invention, the function of the small band pass filter can be realized by using a single resonant cavity.
  • DRAWINGS The drawings used in the examples or the description of the prior art are described in a single manner. It is obvious that the drawings in the following description are only some embodiments of the present invention, and are not creative to those skilled in the art. Other drawings can also be obtained from these drawings on the premise of labor.
  • FIG. 1 is a schematic structural view of a resonant cavity of the present invention before a metamaterial plate is disposed;
  • FIG. 2 is a schematic structural view of the resonant cavity of FIG. 1 after adding a metamaterial board;
  • FIG. 3 is a schematic structural view of one of the metamaterial sheets of the metamaterial plate in the resonant cavity shown in FIG. 2;
  • FIG. 4 is a schematic view of the simulation of the resonant cavity shown in FIG.
  • Figure 5 is a schematic diagram of the simulation of the resonant cavity shown in Figure 2;
  • 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 artificial microstructure is a cross-shaped derivative
  • Figure 8 is a schematic view showing the structure of the artificial microstructure in the form of another cross-shaped derivative
  • 9 to 11 are schematic views showing the structure of three embodiments in which the artificial microstructure is spiral. Specific embodiment
  • the resonant cavity includes a cavity 100, a metal plate 700, an input terminal 510, and an output terminal 500.
  • the metal plate 700 is mounted inside the cavity 100 to divide the internal space of the cavity 100 into two closed chambers 300.
  • the metal plate 700 is preferably a copper plate.
  • the cross section of the metal plate 700 is the same as the cross section of the cavity 100, so that the two chambers 300 are completely insulated, for example, the size of the cavity 100 is 20 mm 20 mm 20 mm, and the size of the metal plate 700 is 20 mm 20 mm 4 mm.
  • the input end 510 and the output end 500 are respectively mounted on the side walls of the cavity 100 and extend into the interiors of the two chambers 300, respectively.
  • the input terminal 510 and the output terminal 500 are disposed opposite to each other to form a central axis.
  • the metal plate 700 is passed through a connecting rod 400, and the connecting rod 400 and the metal plate 700 are insulated by an insulating sleeve or the like to insulate the connecting rod 400 from the metal plate 700.
  • the axis of the connecting rod 400 is collinear with the central axis of the input end 510 and the output end 500. As shown in Fig. 1, the ends of the connecting rod 400 extend into the two chambers 300, respectively.
  • the connecting rod 400 is a copper rod, and the portion of the input end 510 and the output end 500 that extends into the chamber 300 is also preferably a copper rod.
  • the connecting rod 400 and the input end 510 and the end of the output end 500 can also be made of other metal materials.
  • An innovation of the present invention is that a metamaterial plate 600 is disposed in each of the two chambers 300, and each of the metamaterial plates 600 is sandwiched between the input end 510 or the output end 500 and the end of the corresponding connecting rod 400. It was thus overhead.
  • a support made of a wave-transparent material such as foam may be placed on the bottom of each of the meta-material sheets 600 to support.
  • Metamaterial also known as artificial electromagnetic material, is a material that has a special response to electromagnetic waves. It is formed by a dielectric substrate and artificial microstructures periodically arranged on the surface of the dielectric substrate.
  • the artificial microstructure is usually metal. Made of a conductive material.
  • the metamaterials can be characterized as special, even in nature, such as higher dielectric constants, negative magnetic permeability, and negative refraction. Rate and other characteristics. This technique is employed in the metamaterial sheet of the present invention so that the resonant cavity of the present invention has the effect of a resonant bandwidth.
  • the metamaterial sheet includes at least one metamaterial sheet, and each of the metamaterial sheets includes seven metamaterial sheets.
  • Each of the metamaterial sheets includes a substrate 3 and a plurality of artificial microstructures 2 attached to the substrate 3.
  • the substrate 3 is usually made of a non-metal material such as FR-4, polytetrafluoroethylene, epoxy resin, ceramics or the like.
  • the artificial microstructure 2 is a planar planar or three-dimensional structure composed of wires of a conductive material, which is usually a metal such as copper, silver or the like, and may also be other non-metallic conductive materials such as ITO, conductive plastic, and the like.
  • the adjacent two meta-material sheets are mechanically or adhesively joined together or are solidified by pouring a liquid substrate material between the two meta-material sheets to fuse the two. Come together.
  • the artificial microstructures 2 are usually arranged periodically on the surface of the substrate 3, for example, in a rectangular array, and each of the artificial microstructures 2 is the same; or the plurality of artificial microstructures 2 may have different shapes and sizes, for example, according to a certain The increasing or decreasing law gradually reduces its size or rotates its orientation.
  • These features can be designed point-to-point according to different actual needs, such as the demand of refractive index distribution, the permeability distribution requirement, and the like.
  • the two metamaterial sheets are all identical, each comprising a plurality of the same amount of metamaterial sheets, each having a plurality of identical artificial microstructures arranged in a rectangular array.
  • the artificial microstructure 2 may be in the shape of an I-shape, comprising a first metal line in a straight line and two second metal lines connected at both ends of the first metal line and vertically divided by the first metal line; such an I-shaped artificial microstructure 2 may further be derivatized to obtain an I-shaped derivative shape.
  • the method further includes connecting to each of the second metal lines 202 and being respectively connected.
  • the third metal lines 203 vertically halved by the second metal lines 202 are respectively connected to the ends of each of the third metal lines 203
  • the fourth metal line 204 which is vertically divided by the third metal line 203, and so on, continue to be derivatized.
  • the artificial microstructure 2 of the present invention may also be a cross-shaped derivative shape including two first metal wires 201 that are vertically and halved to form a cross, and are further connected to the ends of each of the first metal wires 201, respectively.
  • the second metal line 202 vertically divided by the first metal line 201 is formed as shown in FIG. 3; further, as shown in FIG. 7, when the artificial microstructure is in addition to the first and second metal lines, A third metal line 203 respectively connected to each end of each of the second metal lines 202 and vertically divided by the second metal lines 202 may be included, and respectively connected to each of the third metal lines 203 and each of the third metals Line 203 is a bifurcated fourth metal line 204.
  • Other derivatives can also be obtained by analogy.
  • the artificial microstructure 2 includes four identical branches 210, and any of the branches 210 is rotated 90 degrees, 180 degrees, and 270 in sequence with a point of rotation. The degrees are successively coincident with the other three branches 210.
  • each branch 210-end is connected to the other three branches 210 at the same end, and the other end is a free end, and at least one bent portion is disposed between the ends.
  • the bent portion here may be a right angle bend, or a sharp corner bend or a round corner bend.
  • the outer part of the free end can also be connected with straight segments or other curves.
  • Such an artificial microstructure 2 is an isotropic structure, and its response characteristics to electromagnetic waves are the same in all directions of the plane in which it is located, and the above-described cross-shaped derivative artificial microstructures as shown in FIGS. 3 and 7 also have such characteristics. .
  • a metamaterial plate having an isotropic artificial microstructure is preferred.
  • Fig. 9 is a clockwise, counterclockwise spiral at both ends of a wire
  • Fig. 10 is a synchronous spiral with one wire folded in half
  • Fig. 11 is a structure in which four identical spirals are connected at one end. Such a spiral structure enables the first metamaterial block to have a higher dielectric constant, thereby reducing the frequency.
  • the cavity shown in Fig. 1 and the cavity shown in Fig. 2 after the addition of the metamaterial plate in the cavity shown in Fig. 1 were simulated.
  • the internal dimensions of the cavity are 20mm X 20mm x 20mm, the size of the metal plate is 20mm x 20mm x 4mm, the metal plate is copper plate; the input end and the output end are copper rods, the diameter is lmm, respectively
  • the chamber is extended to 2.6 mm; the connection 4 is made of copper 4 dry, with a diameter of 1.1 mm, and its ends are also extended into the two chambers by 2.6 mm.
  • each super material board has 7 super The sheet of material, the substrate of each metamaterial sheet is FR-4, 0.4mm thick, and the artificial microstructures are arranged in a rectangular array on the substrate with a line offset of 1.4mm and a column of 1.4mm, each artificial The dimensions of the microstructure are 1.2 mm 1.2 mm and the line width is 0.1 mm.
  • the geometry is shown in Figure 3.
  • the function of the small band pass filter can be realized by using a single resonant cavity, because the input end and the output end act as excitation ports, so that each artificial microstructure of the metamaterial board occurs. Resonance, cross coupling, and resonant frequency synchronization to achieve energy storage and frequency reduction.

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Abstract

Fait l'objet de cette invention une cavité résonante comprenant un corps de cavité; deux plaques métalliques scellant la chambre de cavité et divisant le corps de cavité en deux, montées dans la partie interne du corps de cavité; et deux parois latérales montées respectivement dans le corps de cavité et s'étendant respectivement vers une extrémité d'entrée et une extrémité de sortie pratiquées dans les deux chambres de cavité, les deux chambres de cavité logeant chaque plaque de métamatériau qui comprend un substrat non métallique et adhérant à au moins une microstructure artificielle sur le substrat, chaque microstructure artificielle étant une structure 2D ou 3D géométrique formée d'un fil de soie en matériau conducteur. Grâce à cette structure de cavité résonante, il est possible de n'utiliser qu'une seule cavité résonante de manière
PCT/CN2011/083993 2011-08-16 2011-12-14 Cavité résonante et filtre d'ondes à cavité résonante Ceased WO2013023424A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN201110233289.8A CN102938487B (zh) 2011-08-16 2011-08-16 一种谐振腔
CN201110233289.8 2011-08-16

Publications (1)

Publication Number Publication Date
WO2013023424A1 true WO2013023424A1 (fr) 2013-02-21

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WO (1) WO2013023424A1 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104253307B (zh) * 2014-08-22 2019-09-24 深圳光启尖端技术有限责任公司 超材料复合结构及其制造方法
EP3387705B1 (fr) 2016-04-26 2022-06-22 Huawei Technologies Co., Ltd. Agencement d'antenne

Citations (4)

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Publication number Priority date Publication date Assignee Title
CN1913220A (zh) * 2006-08-28 2007-02-14 同济大学 一种可降低截止频率的三维谐振腔
US20090174609A1 (en) * 2006-07-14 2009-07-09 Yamaguchi University Stripline-type composite right/left-handed transmission line or left-handed transmission line, and antenna that uses same
CN101499549A (zh) * 2008-02-01 2009-08-05 清华大学 滤波器
US20100141358A1 (en) * 2005-01-18 2010-06-10 University Of Massachusetts Lowell Chiral Metamaterials

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US6727863B2 (en) * 2001-10-26 2004-04-27 The Hong Kong University Of Science And Technology Planar band gap materials
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CN100541906C (zh) * 2007-02-09 2009-09-16 哈尔滨工业大学 超小型谐振腔
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US20100141358A1 (en) * 2005-01-18 2010-06-10 University Of Massachusetts Lowell Chiral Metamaterials
US20090174609A1 (en) * 2006-07-14 2009-07-09 Yamaguchi University Stripline-type composite right/left-handed transmission line or left-handed transmission line, and antenna that uses same
CN1913220A (zh) * 2006-08-28 2007-02-14 同济大学 一种可降低截止频率的三维谐振腔
CN101499549A (zh) * 2008-02-01 2009-08-05 清华大学 滤波器

Non-Patent Citations (1)

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Title
WEI, ZEYONG ET AL.: "Multi-band Reflectivity from Metallic Photonic Crystals Containing Spiral-like Patterns.", IC020: MATERIALS AND NANOSTRUCTURES, PROC. OF SPIE., vol. 6029, 3 February 2006 (2006-02-03), pages 602921-1 - 602921-6 *

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