WO2013016922A1 - Resonant cavity and filter having the resonant cavity - Google Patents

Resonant cavity and filter having the resonant cavity Download PDF

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Publication number
WO2013016922A1
WO2013016922A1 PCT/CN2011/083897 CN2011083897W WO2013016922A1 WO 2013016922 A1 WO2013016922 A1 WO 2013016922A1 CN 2011083897 W CN2011083897 W CN 2011083897W WO 2013016922 A1 WO2013016922 A1 WO 2013016922A1
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WIPO (PCT)
Prior art keywords
resonant cavity
metamaterial
artificial microstructure
substrate
branches
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PCT/CN2011/083897
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French (fr)
Chinese (zh)
Inventor
刘若鹏
栾琳
刘京京
苏翠
刘豫青
刘尧
Original Assignee
深圳光启高等理工研究院
深圳光启创新技术有限公司
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Publication of WO2013016922A1 publication Critical patent/WO2013016922A1/en

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    • 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
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01P—WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
    • H01P7/00—Resonators of the waveguide type
    • H01P7/08—Strip line resonators
    • H01P7/082—Microstripline 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
  • Filters are one of the common devices in radio technology and are widely used in electronic devices such as communication, radar, navigation, electronic countermeasures, satellites, and test instruments.
  • the filter is internally filled with a resonant cavity.
  • the volume of the filter depends mainly on the number and volume of the resonant cavity.
  • the resonant frequency of the microwave cavity depends on the volume of the cavity. Generally, the larger the cavity volume is, the lower the resonance frequency is. The cavity volume is reduced. The higher the resonance frequency is, so how to achieve the situation without increasing the cavity size. Lowering the resonant frequency of the resonant cavity is important for the miniaturization of the filter. Summary of the invention
  • the technical problem to be solved by the present invention is that the low frequency of the above-mentioned resonant cavity of the prior art causes a large volume defect, and provides a resonant cavity that realizes a low resonant frequency without increasing the size and a filter having the resonant cavity. .
  • the invention provides a resonant cavity, and an input end and an output end are respectively disposed on inner walls of both sides of the cavity.
  • the cavity is provided with two spaced apart metamaterial blocks, the two metamaterial blocks are respectively in contact with the input end and the output end, and each metamaterial block comprises a substrate made of a non-metal material and attached to the An artificial microstructure on the substrate, the artificial microstructure being a geometrically patterned structure composed of wires of a conductive material.
  • the metamaterial block comprises a plurality of laminated super material sheets, each of the super material sheets comprising a substrate and an artificial microstructure attached to the surface of the substrate and periodically arranged.
  • the plurality of metamaterial sheets are packaged into one piece by mechanical connection or bonding.
  • a cavity is disposed in the cavity, and the metamaterial block is fixed on the support.
  • a socket is disposed on the support, and the meta-material block is inserted into the slot.
  • the support is made of a wave transmissive material.
  • the support is made of foam or plastic.
  • the substrate is made of ceramic, polytetrafluoroethylene, epoxy resin, ferroelectric material, ferrite material, ferromagnetic material or FR-4 material.
  • the artificial microstructure is a cross shape or a cross shape.
  • the cross-shaped derivative has four identical branches, and any of the branches is rotated 90 degrees, 180 degrees, and 270 degrees in a row as a center of rotation, and then coincides with the other three branches in turn.
  • each of the branches 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 free end of the branch is connected with a line segment.
  • the artificial microstructure is made of metal.
  • the artificial microstructure is made of silver or copper.
  • the artificial microstructure is composed of a non-metal conductive material.
  • the artificial microstructure is made of ITO.
  • the two metamaterial blocks are arranged side by side with a spacing therebetween.
  • 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 beneficial effects:
  • BRIEF DESCRIPTION OF THE DRAWINGS The accompanying drawings, which are incorporated in the claims Other drawings may also be obtained from these drawings without the inventive labor.
  • FIG. 1 is a schematic structural view of a resonant cavity of a preferred embodiment of the present invention
  • FIG. 2 is a schematic structural view of a meta-material block of the resonant cavity shown in FIG. 1; 3 is a schematic structural view of a derivative structure in which an artificial microstructure is an I-shape;
  • Figure 4 is a schematic view showing the structure of an artificial microstructure having a cross shape
  • FIG. 5 to FIG. 8 are schematic diagrams showing the structure of the artificial microstructures in the form of four other cross-shaped shapes;
  • FIG. 9 is a diagram showing the effect of simulating the cavity in which the super-material blocks are not placed in the cavity;
  • FIG. 10 is FIG. The simulation effect diagram of the super-material block is added to the resonator used.
  • the invention relates to a resonant cavity, which mainly refers to a microwave resonant cavity.
  • a resonant cavity provided by a first embodiment of the present invention has a cavity filled with a medium inside.
  • the medium filled in the cavity of the present invention is a metamaterial.
  • the invention relates to a resonant cavity for a filter.
  • the resonant cavity includes a housing 5, an input end 6 and an output end 7 disposed on two side walls of the housing 5 and extending into the resonant cavity.
  • the resonant cavity is disposed side by side and spaced apart
  • Two super-material blocks 1 spaced apart are in contact with the input end 6 and the output end 7, respectively.
  • the input end 6 and the output end 7 are probe ports, which are used to resonate the super material block 1 and synchronize the resonance modes to achieve energy storage frequency reduction, thereby achieving the effect of miniaturizing the filter.
  • a support can be placed in the cavity, and a socket is arranged on the support to insert the metamaterial block into the slot.
  • the support is preferably a wave-transmissive material such as foam, plastic or the like.
  • each metamaterial block 1 includes at least one metamaterial sheet. When there are a plurality of super-material sheets, they are laminated in a direction perpendicular to the surface thereof and packaged as a whole by mechanical connection or bonding.
  • Each of the metamaterial sheets comprises a substrate 3 and an artificial microstructure 2 attached to the substrate 3.
  • the substrate 3 is made of a non-metallic material such as polytetrafluoroethylene, epoxy resin, ceramic, ferrite material, ferroelectric material. , ferromagnetic materials, FR-4 materials, etc.
  • the artificial microstructure 2 is a structure of a certain geometric pattern composed of at least one wire on the surface of the substrate 3, such as a "work" shape, an open resonance ring, and the like.
  • the wires of the artificial microstructure 2 are made of a conductive material, usually a metal such as silver, copper, etc., and may also be made of other non-metallic conductive materials such as ITO.
  • the wire has a line width of less than 1 mm, preferably a processable minimum line width of, for example, 0.1 mm; the thickness of the wire is very thin, usually the thickness of the plating layer, and is usually less than 0.1 mm, for example 0.018 mm, in the present invention.
  • the artificial microstructure 2 there are many kinds of geometric patterns of the artificial microstructure 2, such as the I-shape, which includes straight lines. a first metal line 201 and two second metal lines 202 connected at both ends of the first metal line 201 and vertically divided by the first metal line 201; such an I-shaped artificial microstructure can be further derivatized to obtain an I-shape a derivative shape, as shown in FIG. 3, in addition to the first and second metal lines, a third metal line 203 connected to each end of each second metal line 202 and vertically divided by the second metal line 202, The fourth metal lines 204 respectively connected to the ends of each of the third metal lines 203 and vertically divided by the third metal lines 203, and so on, continue to be derivatized.
  • the fourth metal lines 204 respectively connected to the ends of each of the third metal lines 203 and vertically divided by the third metal lines 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.
  • a derivative shape formed by the second metal line 202 vertically divided by the first metal line 201 is as shown in FIG. 2; further, when the artificial microstructure is divided into the first and second metal lines, it may further comprise a third metal line 203 at both ends of the second metal line 202 and vertically divided by the second metal line 202, and a first line respectively connected to each of the third metal lines 203 and vertically divided by each of the third metal lines 203
  • the four metal wires 204 are structured as shown in FIG. Other derivatives can also be obtained by analogy.
  • the artificial microstructure 2 includes four identical branches 210, and the four branches 210 have one end point, and any of the branches 210 rotates 90 sequentially with the end points as the center of rotation. Degrees, 180 degrees, and 270 degrees are successively coincident with the other three branches 210, respectively. Therefore, 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. 2 and 4 also have such a structure. Characteristics. Of course, the four branches 210 of the above-described artificial structure 2 may not have a common end point.
  • each branch 210 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 two ends.
  • the bent portion here may be a right angle bend as shown in Fig. 5, or a sharp corner bend as shown in Fig. 6, Fig. 7, or a rounded corner bend, as shown in Fig. 8.
  • the outer end of the free end may also be connected with a straight line segment. As shown in Fig. 7 and Fig. 8, the end point of the free end is preferably connected to the midpoint of the line segment.
  • the invention simulates a cavity with a cavity inside a cavity, the size of the cavity is 20mm ⁇ 20mm ⁇ 20mm, and the input end and the output end respectively extend into the cavity by 3mm, and the simulation effect diagram is shown in FIG. 9 , which can be seen from the figure.
  • each metamaterial block includes five identical metamaterials.
  • the surface of the sheet is superposed on each other.
  • the substrate is selected from FR4 material with a thickness of 0.4 mm.
  • the overall size of each artificial microstructure is 1.3 mm x 1.3 mm.
  • the artificial structure is 1.4 mm in line offset and column offset.
  • the 5x11 array is arranged, and the artificial microstructure is selected as the geometry shown in Fig. 8.
  • the copper wire is used to form the pattern, and the line width and the trace spacing are both 0.1 mm. Both the input end and the output end are located in the middle of the sides of the two metamaterial blocks as shown in FIG.
  • Fig. 10 The simulation effect of using such a super-material block resonator is shown in Fig. 10.
  • the resonant frequency is 6.8 GHz
  • Sll -28 dB
  • S21 -0.03 dB. Therefore, it can be known that although the FR4 material with relatively large loss is used as the substrate, the insertion loss of the cavity is still small, and the resonance frequency is effectively reduced, which is substantially reduced by 6 GHz, and the mode interference is small and the curve is smooth. It shows that the resonance of the artificial microstructure is relatively neat and synchronous.
  • the resonance frequency can be effectively reduced without increasing the volume, which is advantageous for miniaturization of the filter.
  • the present invention has the advantage of low insertion loss.

Abstract

Provided is a resonant cavity. An input terminal and an output terminal are disposed on inner walls on two sides of the cavity respectively. Two metamaterial blocks separated from each other are disposed in the resonant cavity. The two metamaterial blocks contact the input terminal and the output terminal respectively. Each metamaterial block comprises a substrate made of a non-metallic material and a man-made microstructure adhering to the substrate. The man-made microstructure is a structure that is formed of a thread made of an electrically conductive material and has a geometric pattern. By adding the metamaterial blocks into the resonant cavity, the resonant frequency can be effectively decreased without increasing the volume, thereby facilitating miniaturization of a filter. Also provided is a filter having the resonant cavity.

Description

一种谐振腔及具有该谐振腔的滤波器  Resonant cavity and filter having the same
本申请要求于 2011年 7月 29日提交中国专利局、申请号为 201110216575.3 , 发明名称为 "一种谐振腔" 的中国专利申请的优先权， 其全部内容通过引用结 合在本申请中。 技术领域  The present application claims priority to Chinese Patent Application No. 201110216575.3, the entire disclosure of which is incorporated herein by reference. Technical field
本发明涉及无线通信领域， 更具体地说， 涉及一种谐振腔及具有该谐振腔 的滤波器。 背景技术  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
滤波器是无线电技术中的常见器件之一， 被广泛应用于通讯、 雷达、 导航、 电子对抗、 卫星、 测试仪表等电子设备中。 滤波器内部装有谐振腔， 滤波器的 体积主要取决于谐振腔的个数和容积。 而微波谐振腔的谐振频率取决于该腔的 容积， 一般来说， 谐振腔容积越大谐振频率越低， 谐振腔容积减小谐振频率越 高， 因此如何实现在不增大谐振腔尺寸的情况下降低谐振腔的谐振频率对于滤 波器的小型化具有重要的意义。 发明内容  Filters are one of the common devices in radio technology and are widely used in electronic devices such as communication, radar, navigation, electronic countermeasures, satellites, and test instruments. The filter is internally filled with a resonant cavity. The volume of the filter depends mainly on the number and volume of the resonant cavity. The resonant frequency of the microwave cavity depends on the volume of the cavity. Generally, the larger the cavity volume is, the lower the resonance frequency is. The cavity volume is reduced. The higher the resonance frequency is, so how to achieve the situation without increasing the cavity size. Lowering the resonant frequency of the resonant cavity is important for the miniaturization of the filter. Summary of the invention
本发明要解决的技术问题在于， 针对现有技术的上述谐振腔低频会导致体 积大的缺陷， 提供一种不增大尺寸的条件下实现低谐振频率的谐振腔及具有该 谐振腔的滤波器。  The technical problem to be solved by the present invention is that the low frequency of the above-mentioned resonant cavity of the prior art causes a large volume defect, and provides a resonant cavity that realizes a low resonant frequency without increasing the size and a filter having the resonant cavity. .
本发明提供一种谐振腔， 所述腔体两侧内壁上分别设置有输入端和输出端。 所述谐振腔内设置有两个间隔设置的超材料块， 所述两个超材料块分别与输入 端和输出端接触， 每个超材料块包括非金属材料制成的基板和附着在所述基板 上的人造微结构， 所述人造微结构为导电材料的丝线组成的具有几何图案的结 构。  The invention provides a resonant cavity, and an input end and an output end are respectively disposed on inner walls of both sides of the cavity. The cavity is provided with two spaced apart metamaterial blocks, the two metamaterial blocks are respectively in contact with the input end and the output end, and each metamaterial block comprises a substrate made of a non-metal material and attached to the An artificial microstructure on the substrate, the artificial microstructure being a geometrically patterned structure composed of wires of a conductive material.
其中， 所述超材料块包括多个层叠成一体的超材料片层， 每个超材料片层 包括一片基板和附着在基板表面上且周期性排布的人造微结构。  Wherein, the metamaterial block comprises a plurality of laminated super material sheets, each of the super material sheets comprising a substrate and an artificial microstructure attached to the surface of the substrate and periodically arranged.
其中， 所述多个超材料片层通过机械连接或者粘接封装成一块。  Wherein, the plurality of metamaterial sheets are packaged into one piece by mechanical connection or bonding.
其中， 所述腔体内设置有支座， 所述超材料块固定在所述支座上。 其中， 所述支座上设置插槽， 所述超材料块插于所述插槽内。 Wherein, a cavity is disposed in the cavity, and the metamaterial block is fixed on the support. Wherein, a socket is disposed on the support, and the meta-material block is inserted into the slot.
其中， 所述支座采用透波材料制成。  Wherein, the support is made of a wave transmissive material.
其中， 所述支座采用泡沫或塑料。  Wherein, the support is made of foam or plastic.
其中， 所述基板由陶瓷、 聚四氟乙烯、 环氧树脂、 铁电材料、 铁氧材料、 铁磁材料或者 FR-4材料制成。 其中， 所述人造微结构为十字形或者十字形的衍生形。  Wherein, the substrate is made of ceramic, polytetrafluoroethylene, epoxy resin, ferroelectric material, ferrite material, ferromagnetic material or FR-4 material. Wherein, the artificial microstructure is a cross shape or a cross shape.
其中， 所述十字形的衍生形具有四个相同的支路， 任一支路以一点为旋转 中心依次旋转 90度、 180度、 270度后依次分别于其他三个支路重合。  Wherein, the cross-shaped derivative has four identical branches, and any of the branches is rotated 90 degrees, 180 degrees, and 270 degrees in a row as a center of rotation, and then coincides with the other three branches in turn.
其中， 每个所述支路一端与其他三个支路共端点连接， 另一端为自由端， 两端之间设置有至少一个弯折部。  Wherein, one end of each of the branches 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.
其中， 所述支路的自由端连接有一线段。  Wherein, the free end of the branch is connected with a line segment.
其中， 所述自由端与所述线段的中点连接。  Wherein the free end is connected to a midpoint of the line segment.
其中， 所述人造微结构由金属制成。  Wherein the artificial microstructure is made of metal.
其中， 所述人造微结构由银或铜制成。  Wherein the artificial microstructure is made of silver or copper.
其中， 所述人造微结构为非金属的导电材料组成。  Wherein, the artificial microstructure is composed of a non-metal conductive material.
其中， 所述人造微结构由 ITO制成。  Wherein the artificial microstructure is made of ITO.
其中， 所述两个超材料块并排设置且之间隔有间距。  Wherein, the two metamaterial blocks are arranged side by side with a spacing therebetween.
相应地， 本发明实施例还提供了一种滤波器， 所述滤波器包括至少一个上 述的谐振腔。  Accordingly, embodiments of the present invention also provide a filter including at least one of the above-described resonant cavities.
实施本发明的谐振腔， 具有以下有益效果： 采用本发明的谐振腔， 其加入 超材料片层后， 能够有利于实现谐振腔及滤波器的小型化。 附图说明 例或现有技术描述中所需要使用的附图作筒单地介绍， 显而易见地， 下面描述 中的附图仅仅是本发明的一些实施例， 对于本领域普通技术人员来讲， 在不付 出创造性劳动性的前提下， 还可以根据这些附图获得其他的附图。  The implementation of the resonant cavity of the present invention has the following beneficial effects: The use of the resonant cavity of the present invention, which is added to the metamaterial sheet, facilitates miniaturization of the resonant cavity and the filter. BRIEF DESCRIPTION OF THE DRAWINGS The accompanying drawings, which are incorporated in the claims Other drawings may also be obtained from these drawings without the inventive labor.
图 1是本发明优选实施例的谐振腔的结构示意图；  1 is a schematic structural view of a resonant cavity of a preferred embodiment of the present invention;
图 2是图 1所示谐振腔的超材料块的结构示意图； 图 3是人造微结构为工字形的衍生形的结构示意图； 2 is a schematic structural view of a meta-material block of the resonant cavity shown in FIG. 1; 3 is a schematic structural view of a derivative structure in which an artificial microstructure is an I-shape;
图 4是人造微结构为十字形的衍生形的结构示意图；  Figure 4 is a schematic view showing the structure of an artificial microstructure having a cross shape;
图 5至图 8是人造微结构为另四种十字形的衍生形的结构示意图； 图 9为对谐振腔内没有放入超材料块的谐振腔进行仿真的效果图； 图 10为对图 9所用谐振腔中加入超材料块后的仿真效果图。 具体实施例  5 to FIG. 8 are schematic diagrams showing the structure of the artificial microstructures in the form of four other cross-shaped shapes; FIG. 9 is a diagram showing the effect of simulating the cavity in which the super-material blocks are not placed in the cavity; FIG. 10 is FIG. The simulation effect diagram of the super-material block is added to the resonator used. Specific embodiment
本发明涉及一种谐振腔， 主要是指微波谐振腔， 请参阅图 1 , 本发明第一实 施例提供的谐振腔， 其内部为填充介质的腔体。 本发明在腔体内填充的介质为 超材料。  The invention relates to a resonant cavity, which mainly refers to a microwave resonant cavity. Referring to Fig. 1, a resonant cavity provided by a first embodiment of the present invention has a cavity filled with a medium inside. The medium filled in the cavity of the present invention is a metamaterial.
本发明涉及一种谐振腔， 所述谐振腔用于滤波器。 如图 1 所示， 所述谐振 腔包括壳体 5、 设置在壳体 5两侧壁上且伸入谐振腔内的输入端 6和输出端 7, 谐振腔内设置有并排设置且之间隔有间距的两个超材料块 1 ,分别与输入端 6和 输出端 7接触。 本实施例中， 输入端 6和输出端 7均为探针端口， 用来使超材 料块 1 发生谐振， 并且谐振方式同步， 达到储能降频、 从而实现滤波器小型化 的效果。  The invention relates to a resonant cavity for a filter. As shown in FIG. 1, the resonant cavity includes a housing 5, an input end 6 and an output end 7 disposed on two side walls of the housing 5 and extending into the resonant cavity. The resonant cavity is disposed side by side and spaced apart Two super-material blocks 1 spaced apart are in contact with the input end 6 and the output end 7, respectively. In this embodiment, the input end 6 and the output end 7 are probe ports, which are used to resonate the super material block 1 and synchronize the resonance modes to achieve energy storage frequency reduction, thereby achieving the effect of miniaturizing the filter.
为了便于超材料块 1 的固定， 可在谐振腔内放置支座， 支座上设置插槽， 将超材料块***插槽内即可。 支座优选泡沫等透波材料如泡沫、 塑料等。  In order to facilitate the fixing of the super material block 1, a support can be placed in the cavity, and a socket is arranged on the support to insert the metamaterial block into the slot. The support is preferably a wave-transmissive material such as foam, plastic or the like.
如图 1、 图 2所示， 每个超材料块 1包括至少一个超材料片层。 当超材料片 层有多个时， 它们沿垂直于其表面的方向层叠并通过机械连接或者粘接等方式 封装成一块整体。  As shown in Figures 1 and 2, each metamaterial block 1 includes at least one metamaterial sheet. When there are a plurality of super-material sheets, they are laminated in a direction perpendicular to the surface thereof and packaged as a whole by mechanical connection or bonding.
每个超材料片层均包括基板 3和附着在基板 3上的人造微结构 2,基板 3由 非金属材料制成， 如聚四氟乙烯、 环氧树脂、 陶瓷、 铁氧材料、 铁电材料、 铁 磁材料、 FR-4材料等。 人造微结构 2为至少一根丝线在基板 3表面上组成的一 定几何图案的结构， 例如 "工" 字形、 开口谐振环形等。 人造微结构 2 的丝线 是由导电材料制成的， 通常为金属如银、 铜等， 也可以用其他非金属的导电材 料如 ITO制成。 这些丝线的线宽在 1mm以内， 优选为可加工的最小线宽例如 0.1mm; 丝线的厚度很薄， 通常为镀层的厚度， 本发明中通常小于 0.1mm, 例如 0.018mm。  Each of the metamaterial sheets comprises a substrate 3 and an artificial microstructure 2 attached to the substrate 3. The substrate 3 is made of a non-metallic material such as polytetrafluoroethylene, epoxy resin, ceramic, ferrite material, ferroelectric material. , ferromagnetic materials, FR-4 materials, etc. The artificial microstructure 2 is a structure of a certain geometric pattern composed of at least one wire on the surface of the substrate 3, such as a "work" shape, an open resonance ring, and the like. The wires of the artificial microstructure 2 are made of a conductive material, usually a metal such as silver, copper, etc., and may also be made of other non-metallic conductive materials such as ITO. The wire has a line width of less than 1 mm, preferably a processable minimum line width of, for example, 0.1 mm; the thickness of the wire is very thin, usually the thickness of the plating layer, and is usually less than 0.1 mm, for example 0.018 mm, in the present invention.
人造微结构 2 的几何图案有很多种情况， 已知的如工字形， 其包括成直线 的第一金属线 201和连接在第一金属线 201两端且被第一金属线 201垂直平分 的两根第二金属线 202; 这样的工字形人造微结构还可以进一步衍生，得到工字 形的衍生形， 如图 3 所示， 其除了第一、 第二金属线外， 还包括分别连接在每 根第二金属线 202两端且被第二金属线 202垂直平分的第三金属线 203、分别连 接在每根第三金属线 203两端且被第三金属线 203垂直平分的第四金属线 204, 依此类推， 继续衍生。 There are many kinds of geometric patterns of the artificial microstructure 2, such as the I-shape, which includes straight lines. a first metal line 201 and two second metal lines 202 connected at both ends of the first metal line 201 and vertically divided by the first metal line 201; such an I-shaped artificial microstructure can be further derivatized to obtain an I-shape a derivative shape, as shown in FIG. 3, in addition to the first and second metal lines, a third metal line 203 connected to each end of each second metal line 202 and vertically divided by the second metal line 202, The fourth metal lines 204 respectively connected to the ends of each of the third metal lines 203 and vertically divided by the third metal lines 203, and so on, continue to be derivatized.
同样， 本发明的人造微结构 2还可以是十字形的衍生形， 其包括两根垂直 且互相平分构成十字形的第一金属线 201 , 还包括分别连接在每根第一金属线 201两端且被第一金属线 201垂直平分的第二金属线 202, 构成的衍生形如图 2 所示； 进一步地， 当人造微结构除第一、 第二金属线外， 还可包括分别连接在 每根第二金属线 202两端且被第二金属线 202垂直平分的第三金属线 203 ,以及 分别连接在每根第三金属线 203两端且被每根第三金属线 203垂直平分的第四 金属线 204, 则其结构如图 4所示。 还可以依此类推， 得到其他衍生结构。  Similarly, 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. And a derivative shape formed by the second metal line 202 vertically divided by the first metal line 201 is as shown in FIG. 2; further, when the artificial microstructure is divided into the first and second metal lines, it may further comprise a third metal line 203 at both ends of the second metal line 202 and vertically divided by the second metal line 202, and a first line respectively connected to each of the third metal lines 203 and vertically divided by each of the third metal lines 203 The four metal wires 204 are structured as shown in FIG. Other derivatives can also be obtained by analogy.
在其他十字形的衍生形的实施例中，人造微结构 2包括四个相同的支路 210, 且四个支路 210共一端点，任一支路 210以所述端点为旋转中心依次旋转 90度、 180度、 270度后依次分别于其他三个支路 210重合。 因此， 这样的人造微结构 2为各向同性结构， 其在所在的平面的各个方向上对电磁波的响应特征均相同， 上述如图 2、 图 4的十字形的衍生形人造微结构也具有这样的特性。 当然， 上述 人造 结构 2的四个支路 210也可以不共端点。  In other embodiments of the cross-shaped derivative shape, the artificial microstructure 2 includes four identical branches 210, and the four branches 210 have one end point, and any of the branches 210 rotates 90 sequentially with the end points as the center of rotation. Degrees, 180 degrees, and 270 degrees are successively coincident with the other three branches 210, respectively. Therefore, 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. 2 and 4 also have such a structure. Characteristics. Of course, the four branches 210 of the above-described artificial structure 2 may not have a common end point.
如图 5至图 8所示， 每个支路 210一端与其他三个支路 210共端点连接， 另一端为自由端， 两端之间设置有至少一个弯折部。 这里的弯折部可以为直角 弯折如图 5所示， 也可以是尖角弯折如图 6、 图 7所示， 还可以是圓角弯折， 如 图 8所示。 自由端的外部还可连接有直线段， 如图 7、 图 8所示， 优选为自由端 的端点与该线段的中点连接。  As shown in FIG. 5 to FIG. 8 , one end of each branch 210 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 two ends. The bent portion here may be a right angle bend as shown in Fig. 5, or a sharp corner bend as shown in Fig. 6, Fig. 7, or a rounded corner bend, as shown in Fig. 8. The outer end of the free end may also be connected with a straight line segment. As shown in Fig. 7 and Fig. 8, the end point of the free end is preferably connected to the midpoint of the line segment.
本发明对一谐振腔内部为空腔的谐振腔进行仿真， 空腔的尺寸为 20mmx20mmx20mm, 输入端和输出端分别向腔内伸入 3mm, 其仿真效果图如 图 9所示，由图可知，该空腔谐振腔的谐振频率为 12.68GHz,谐振时 Sll=-15dB , S21=-0.00024428dB , S21是反映电磁波从输入端到输出端的一种正向传输参数， 代表***损耗的大小。 S21越小， ***损耗越小。  The invention simulates a cavity with a cavity inside a cavity, the size of the cavity is 20mm×20mm×20mm, and the input end and the output end respectively extend into the cavity by 3mm, and the simulation effect diagram is shown in FIG. 9 , which can be seen from the figure. The resonant frequency of the cavity resonator is 12.68 GHz, Sll=-15 dB at resonance, S21=-0.00024428 dB, and S21 is a forward transmission parameter reflecting the electromagnetic wave from the input end to the output end, representing the magnitude of the insertion loss. The smaller the S21, the smaller the insertion loss.
在上述谐振腔中装入两个超材料块， 每个超材料块包括 5 个相同的超材料 片层表面相贴合地叠加， 基板选择厚度为 0.4mm的 FR4材料， 每个人造微结构 的总体尺寸为 1.3mmxl.3mm,人造 结构按照行偏移和列偏移均为 1.4mm地以 成 5x11阵列排布， 且人造微结构选择图 8所示的几何图形， 选用铜线组成该图 形， 线宽和走线间距均为 0.1mm。 输入端和输出端均如图 1所示地位于两超材 料块侧面的正中间位置。 Two metamaterial blocks are loaded into the above resonant cavity, and each metamaterial block includes five identical metamaterials. The surface of the sheet is superposed on each other. The substrate is selected from FR4 material with a thickness of 0.4 mm. The overall size of each artificial microstructure is 1.3 mm x 1.3 mm. The artificial structure is 1.4 mm in line offset and column offset. The 5x11 array is arranged, and the artificial microstructure is selected as the geometry shown in Fig. 8. The copper wire is used to form the pattern, and the line width and the trace spacing are both 0.1 mm. Both the input end and the output end are located in the middle of the sides of the two metamaterial blocks as shown in FIG.
采用这样的超材料块的谐振腔， 其仿真效果如图 10所示。 由图可知， 谐振 频率为 6.8GHz, Sll=-28dB, S21=-0.03dB。 因此可以知道， 虽然采用损耗相对 较大的 FR4材料作为基板， 谐振腔的***损耗仍然是很小的， 而谐振频率则得 到了有效的降低， 基本上降低了 6GHz, 而且模干扰小， 曲线光滑表明人造微结 构的谐振比较整齐同步。  The simulation effect of using such a super-material block resonator is shown in Fig. 10. As can be seen from the figure, the resonant frequency is 6.8 GHz, Sll = -28 dB, and S21 = -0.03 dB. Therefore, it can be known that although the FR4 material with relatively large loss is used as the substrate, the insertion loss of the cavity is still small, and the resonance frequency is effectively reduced, which is substantially reduced by 6 GHz, and the mode interference is small and the curve is smooth. It shows that the resonance of the artificial microstructure is relatively neat and synchronous.
由此可见， 通过在谐振腔内加入超材料块， 能够在不增大体积的情况下有 效降低谐振频率， 有利于滤波器的小型化。 另外， 本发明还具有***损耗小的 优点。  It can be seen that by adding a metamaterial block in the cavity, the resonance frequency can be effectively reduced without increasing the volume, which is advantageous for miniaturization of the filter. In addition, the present invention has the advantage of low insertion loss.
上面结合附图对本发明的实施例进行了描述， 但是本发明并不局限于上述 的具体实施方式， 上述的具体实施方式仅仅是示意性的， 而不是限制性的， 本 领域的普通技术人员在本发明的启示下， 在不脱离本发明宗旨和权利要求所保 护的范围情况下， 还可做出很多形式， 这些均属于本发明的保护之内。  The embodiments of the present invention have been described above with reference to the drawings, but the present invention is not limited to the specific embodiments described above, and the specific embodiments described above are merely illustrative and not restrictive, and those skilled in the art In the light of the present invention, many forms may be made without departing from the spirit and scope of the invention as claimed.

Claims

权 利 要 求 Rights request
1. 一种谐振腔， 所述腔体两侧内壁上分别设置有输入端和输出端， 其特征 在于， 所述谐振腔内设置有两个间隔设置的超材料块， 所述两个超材料块分别 与输入端和输出端接触， 每个超材料块包括非金属材料制成的基板和附着在所 述基板上的人造微结构， 所述人造微结构为导电材料的丝线组成的具有几何图 案的结构。 A resonant cavity, an input end and an output end are respectively disposed on inner walls of the two sides of the cavity, wherein the resonant cavity is provided with two spaced apart metamaterial blocks, and the two metamaterials The blocks are respectively in contact with the input end and the output end, each of the metamaterial blocks comprising a substrate made of a non-metallic material and an artificial microstructure attached to the substrate, the artificial microstructure being a geometric pattern composed of a wire of a conductive material Structure.
2. 如权利要求 1所述的谐振腔， 其特征在于， 所述超材料块包括多个层叠 成一体的超材料片层， 每个超材料片层包括一片基板和附着在基板表面上且周 期性排布的人造微结构。  2. The resonant cavity according to claim 1, wherein the metamaterial block comprises a plurality of laminated super material sheets, each of the super material sheets comprising a substrate and attached to a surface of the substrate and having a period Sexually arranged artificial microstructures.
3. 如权利要求 1所述的谐振腔， 其特征在于， 所述多个超材料片层通过机 械连接或者粘接封装成一块。  3. The resonant cavity of claim 1 wherein the plurality of layers of metamaterial are mechanically bonded or bonded together into a single piece.
4. 如权利要求 1所述的谐振腔， 其特征在于， 所述腔体内设置有支座， 所 述超材料块固定在所述支座上。  4. The resonant cavity according to claim 1, wherein a cavity is disposed in the cavity, and the metamaterial block is fixed on the support.
5. 如权利要求 4所述的谐振腔， 其特征在于， 所述支座上设置插槽， 所述 超材料块插于所述插槽内。  5. The resonant cavity of claim 4, wherein the support is provided with a slot, and the meta-material block is inserted into the slot.
6. 如权利要求 5所述的谐振腔， 其特征在于， 所述支座采用透波材料制成。 6. The resonant cavity of claim 5, wherein the support is made of a wave permeable material.
7. 如权利要求 6所述的谐振腔， 其特征在于， 所述支座采用泡沫或塑料。7. The resonant cavity according to claim 6, wherein the support is made of foam or plastic.
8. 如权利要求 1-7任一项所述的谐振腔， 其特征在于， 所述基板由陶瓷、 聚四氟乙烯、 环氧树脂、 铁电材料、 铁氧材料、 铁磁材料或者 FR-4材料制成。 The resonant cavity according to any one of claims 1 to 7, wherein the substrate is made of ceramic, polytetrafluoroethylene, epoxy resin, ferroelectric material, ferrite material, ferromagnetic material or FR- Made of 4 materials.
9. 如权利要求 1-7任一项所述的谐振腔， 其特征在于， 所述人造微结构为 工字形或者工字形的衍生形。  The resonant cavity according to any one of claims 1 to 7, wherein the artificial microstructure is a deformed shape of an I-shape or an I-shape.
10. 如权利要求 1-7任一项所述的谐振腔， 其特征在于， 所述人造微结构为 十字形或者十字形的衍生形。  The resonant cavity according to any one of claims 1 to 7, wherein the artificial microstructure is a cruciform or cruciform derivative.
11. 如权利要求 10所述的谐振腔， 其特征在于， 所述十字形的衍生形具有 四个相同的支路， 任一支路以一点为旋转中心依次旋转 90度、 180度、 270度 后依次分别于其他三个支路重合。  11. The resonant cavity according to claim 10, wherein the cross-shaped derivative has four identical branches, and any of the branches rotates 90 degrees, 180 degrees, and 270 degrees in a row with a point of rotation. After that, they overlap in the other three branches.
12. 如权利要求 11所述的谐振腔， 其特征在于， 每个所述支路一端与其他 三个支路共端点连接， 另一端为自由端， 两端之间设置有至少一个弯折部。  12. The resonant cavity according to claim 11, wherein one end of each of the branches 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 ends. .
13. 如权利要求 12所述的谐振腔， 其特征在于， 所述支路的自由端连接有 一线段。 13. The resonant cavity of claim 12, wherein the free end of the branch is connected One line segment.
14. 如权利要求 13所述的谐振腔， 其特征在于， 所述自由端与所述线段的 中点连接。  14. The resonant cavity of claim 13 wherein said free end is coupled to a midpoint of said line segment.
15. 如权利要求 1-7任一项所述的谐振腔， 其特征在于， 所述人造微结构由 金属制成。  The resonant cavity according to any one of claims 1 to 7, wherein the artificial microstructure is made of metal.
16. 如权利要求 15所述的谐振腔， 其特征在于， 所述人造微结构由银或铜 制成。  16. The resonant cavity of claim 15 wherein the artificial microstructure is made of silver or copper.
17. 如权利要求 1-7任一项所述的谐振腔， 其特征在于， 所述人造微结构为 非金属的导电材料组成。  17. The resonant cavity of any of claims 1-7, wherein the artificial microstructure is comprised of a non-metallic conductive material.
18. 如权利要求 17所述的谐振腔， 其特征在于， 所述人造微结构由 ITO制 成。  18. The resonant cavity of claim 17, wherein the artificial microstructure is made of ITO.
19. 如权利要求 1-7任一项所述的谐振腔， 其特征在于， 所述两个超材料块 并排设置且之间隔有间距。  19. The resonant cavity of any of claims 1-7, wherein the two metamaterial blocks are arranged side by side with a spacing therebetween.
20. 一种滤波器， 所述滤波器包括至少一个如权利要求 1-19任一项所述的 谐振腔。  A filter comprising at least one resonant cavity according to any of claims 1-19.
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