WO2024149154A1 - 超表面单元以及超表面系统 - Google Patents

超表面单元以及超表面系统 Download PDF

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Publication number
WO2024149154A1
WO2024149154A1 PCT/CN2024/070658 CN2024070658W WO2024149154A1 WO 2024149154 A1 WO2024149154 A1 WO 2024149154A1 CN 2024070658 W CN2024070658 W CN 2024070658W WO 2024149154 A1 WO2024149154 A1 WO 2024149154A1
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WIPO (PCT)
Prior art keywords
metasurface
isolation
layer
ground structure
unit
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PCT/CN2024/070658
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English (en)
French (fr)
Inventor
尹卫爽
吴建军
崔亦军
钟坤静
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ZTE Corp
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ZTE Corp
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Priority to KR1020257022714A priority Critical patent/KR20250117428A/ko
Priority to EP24741153.1A priority patent/EP4632953A4/en
Publication of WO2024149154A1 publication Critical patent/WO2024149154A1/zh
Anticipated expiration legal-status Critical
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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q15/00—Devices for reflection, refraction, diffraction or polarisation of waves radiated from an antenna, e.g. quasi-optical devices
    • H01Q15/0006—Devices acting selectively as reflecting surface, as diffracting or as refracting device, e.g. frequency filtering or angular spatial filtering devices
    • H01Q15/0013—Devices acting selectively as reflecting surface, as diffracting or as refracting device, e.g. frequency filtering or angular spatial filtering devices said selective devices working as frequency-selective reflecting surfaces, e.g. FSS, dichroic plates, surfaces being partly transmissive and reflective
    • H01Q15/0026—Devices acting selectively as reflecting surface, as diffracting or as refracting device, e.g. frequency filtering or angular spatial filtering devices said selective devices working as frequency-selective reflecting surfaces, e.g. FSS, dichroic plates, surfaces being partly transmissive and reflective said selective devices having a stacked geometry or having multiple layers
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00—Details of, or arrangements associated with, antennas
    • H01Q1/48—Earthing means; Earth screens; Counterpoises
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00—Details of, or arrangements associated with, antennas
    • H01Q1/52—Means for reducing coupling between antennas; Means for reducing coupling between an antenna and another structure
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q15/00—Devices for reflection, refraction, diffraction or polarisation of waves radiated from an antenna, e.g. quasi-optical devices
    • H01Q15/0006—Devices acting selectively as reflecting surface, as diffracting or as refracting device, e.g. frequency filtering or angular spatial filtering devices
    • H01Q15/0086—Devices acting selectively as reflecting surface, as diffracting or as refracting device, e.g. frequency filtering or angular spatial filtering devices said selective devices having materials with a synthesized negative refractive index, e.g. metamaterials or left-handed materials
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q15/00—Devices for reflection, refraction, diffraction or polarisation of waves radiated from an antenna, e.g. quasi-optical devices
    • H01Q15/14—Reflecting surfaces; Equivalent structures
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q19/00—Combinations of primary active antenna elements and units with secondary devices, e.g. with quasi-optical devices, for giving the antenna a desired directional characteristic
    • H01Q19/10—Combinations of primary active antenna elements and units with secondary devices, e.g. with quasi-optical devices, for giving the antenna a desired directional characteristic using reflecting surfaces

Definitions

  • the present application relates to the field of communication technology, and in particular to a metasurface unit and a metasurface system.
  • Metasurfaces have been widely studied due to their ability to efficiently and cost-effectively regulate electromagnetic waves in space.
  • metasurfaces transition from single-polarization to dual-polarization metasurfaces, there will be problems with polarization crosstalk, AC/DC isolation, and surface waves. Therefore, most existing research focuses on the single-bit single-polarization case.
  • the main purpose of this application is to propose a metasurface unit and a metasurface system, which aims to solve the problem of polarization crosstalk and achieve AC/DC isolation.
  • a metasurface unit comprising a dual-polarized metasurface radiation structure, a first layer ground structure, an isolation structure, a second layer ground structure, and a control structure arranged in layers in sequence, wherein:
  • the dual-polarization metasurface radiation structure includes a radiation patch
  • connection path structure comprises two connecting members arranged in parallel, and the two connecting members extend from at least the layer where the isolation structure is located to the radiation patch;
  • the isolation structure includes an isolation plate corresponding to each of the connecting members, and the isolation plate is used for reflecting radio frequency waves.
  • a metasurface system comprising a plurality of metasurface units, wherein the metasurface units include a dual-polarized metasurface radiation structure, a first layer ground structure, an isolation structure, a second layer ground structure, and a control structure arranged in layers in sequence, wherein:
  • the dual-polarization metasurface radiation structure includes a radiation patch
  • the control structure is connected to the radiation patch via a connection path structure, wherein the connection path structure includes two connectors arranged in parallel, and the two connectors extend from the layer where the isolation structure is located to the radiation patch;
  • the isolation structure includes an isolation plate corresponding to each of the connecting members, and the isolation plate is used for reflecting radio frequency waves.
  • FIG1 is a schematic diagram of an embodiment of a metasurface system provided by the present application.
  • FIG2 is a side view schematic diagram of an embodiment of a metasurface unit provided by the present application.
  • FIG3 is a logical topology diagram of the super surface unit of FIG2 ;
  • FIG4 is a side view schematic diagram of another embodiment of a metasurface unit provided by the present application.
  • FIG5 is a perspective schematic diagram of another embodiment of a metasurface unit provided by the present application.
  • FIG6 is a side structural diagram of the super surface unit of FIG5 ;
  • FIG7 is a perspective exploded schematic diagram of FIG5 ;
  • FIG8 is a top view of the structure of the super surface unit in FIG5 ;
  • FIG9 is a schematic diagram of the isolation structure and the connection path structure of the super surface unit in FIG5 ;
  • FIG10 is a schematic structural diagram of a radiation patch and a mode adjustment structure of the metasurface unit of FIG5 ;
  • FIG. 11 is a polarization isolation curve of the metasurface unit of FIG. 5 .
  • the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back%), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.
  • FIG1 is an embodiment of a metasurface system provided by the present application
  • FIG2 to FIG8 are an embodiment of a metasurface unit provided by the present application.
  • a metasurface system 100 proposed in the present application wherein the metasurface system 100 includes a plurality of metasurface units 100a.
  • the plurality of metasurface units 100a are arranged in a matrix.
  • the present design is not limited to this.
  • the specific arrangement of the plurality of metasurface units 100a can be designed according to actual needs, and the specific number of the plurality of metasurface units 100a is not limited.
  • Figure 2 provides a side view schematic diagram of an embodiment of a metasurface unit, wherein the metasurface unit 100a includes a dual-polarization metasurface radiation structure 1, a first layer ground structure 2, an isolation structure 3, a second layer ground structure 4 and a control structure 5 which are arranged in layers in sequence.
  • the metasurface unit 100a includes a dual-polarization metasurface radiation structure 1, a first layer ground structure 2, an isolation structure 3, a second layer ground structure 4 and a control structure 5 which are arranged in layers in sequence.
  • the dual-polarization metasurface radiation structure 1 includes a radiation patch 11, and the control structure 5 is connected to the radiation patch 11 through a connection path structure 7, and the connection path structure 7 includes two connecting members 71 arranged in parallel, and the two connecting members 71 extend from at least the layer where the isolation structure 3 is located to the radiation patch 11.
  • the isolation structure 3 includes an isolation plate 30 corresponding to each of the connecting members 71, and the isolation plate 30 is used to reflect radio frequency waves.
  • connection path structure 7 is divided into two parallel connecting members 71 between the isolation structure 3 and the radiation patch 11, and the isolation structure 3 is provided with an isolation sheet 30 corresponding to each of the connecting members 71.
  • the digital input from the control structure 5 to the dual-polarization metasurface radiation structure 1 The signal can enter the radiation patch 11 from the two connectors 71 respectively, and the dual-polarized RF signal from the radiation patch 11 will be separated at the two connectors 71, and respectively reflected to the radiation patch 11 through the isolation plate 30, so as to avoid mutual influence between the two, and avoid the RF signal from being transmitted to the control structure 5 and affecting the operation of the control structure 5.
  • AC/DC isolation that is, isolation of digital signals and RF signals, can be achieved, and the problem of polarization crosstalk of the dual-polarization metasurface can be solved.
  • the connecting path structure 7 also includes a main path 70, one end of the main path 70 is connected to the control structure 5, and the other end is connected to the two connecting members 71, that is, a port can be set on the control structure 5, and two polarizations can be controlled through one port, so that the number of port settings can be reduced.
  • Figure 3 is a logical topology diagram of the supersurface unit provided in Figure 2.
  • the control method of the supersurface unit 100a in the embodiment of the present application adopts the form of total (control structure 5)-divided (two connecting parts 71)-total (radiation patch 11).
  • connecting passage structure 7 does not need to be provided with a main path 70.
  • one end of the two connecting members 4 extends to the control structure 5 to be directly connected to the control structure 5.
  • FIGS 5 to 11 are another embodiment of the supersurface unit provided in the present application.
  • the isolation structure 3 is divided into two layers to achieve isolation of the two layers.
  • the isolation structure 3 can be one layer or more than two layers.
  • the control structure 5 is provided with a third layer of ground structure 6 on the side facing away from the second layer of ground structure.
  • the control structure 5 is electrically connected to the third layer of ground structure 6 to achieve grounding protection for the layer where the control structure 5 is located.
  • FIG. 6 is a side view of FIG. 5 , and FIG. 6 further shows the layering of the dual-polarization metasurface radiation structure 1, the first layer ground structure 2, the isolation structure 3, the second layer ground structure 4, the control structure 5 and the third layer ground structure 6, wherein the isolation structure 3 is divided into two layers, and the two layers of the isolation structure 3 are respectively provided with a first isolation plate 31 and a second isolation plate 32, as described in detail in the subsequent parts.
  • the isolation structure 3 includes a first isolation sheet 31 and a second isolation sheet 32 arranged in layers.
  • the first isolation sheet 31 and the second isolation sheet 32 are used to reflect radio frequency waves respectively.
  • the first isolation sheet 31 and the second isolation sheet 32 can reflect radio frequency waves of the same frequency band or radio frequency waves of different frequency bands.
  • Each of the connecting members 71 is connected to a The first isolation sheet 31 and the second isolation sheet 32 can better reflect the radio frequency waves and better achieve AC and DC isolation by setting a multi-layer (2-layer) isolation sheet 30.
  • the first isolation plate 31 is arranged in a rectangular shape
  • the second isolation plate 32 is arranged in an arc shape.
  • the present application is not limited to this.
  • the shapes of the first isolation plate 31 and the second isolation plate 32 can also be other shapes, such as polygons, etc. The difference in their shapes and areas will also result in differences in the reflected frequency bands, which can be adjusted according to the design needs.
  • connection pathway structure 7 also includes an adapter 72 that is set away from the two connectors 71, and one end of the adapter 72 is connected to the control structure 5, and the other end of the adapter 72 is connected to the two connectors 71 through a connecting branch 73.
  • the control structure 5 and the two connectors 71 are connected through the adapter 72, which can extend the path from the control structure 5 to the isolation structure 3, and further reduce the remaining RF signal from the radiation patch 11 after passing through the isolation structure 3, and transmit it to the control structure 5.
  • each of the mode adjustment structures 8 includes a first branch 81 connected to the peripheral side of the radiation patch 11, a second branch 82 connected to the first layer of the ground structure 2, and a switch device 83 connecting the first branch 81 and the second branch 82.
  • the phase difference is a phase difference of 180°.
  • the specific structure of the switch device 83 is not limited, and it can be one of a PIN tube, a varactor, a switch, a MEMS tube, and a non-volatile device.
  • the first layer ground structure 2 and the second layer ground structure 3 are connected by multiple conductive structures to define an isolation cavity therebetween.
  • the isolation structure 3 is arranged in the isolation cavity, so as to suppress the coupling between the units and (for the case where there are multiple array-arranged metasurface units 100a in the metasurface system 100) the waveguide mode in the array.
  • the metasurface unit 100a further includes a back cavity structure 9, which is arranged on one side of the dual-polarization metasurface radiation structure 1.
  • the back cavity structure 9 is connected to the first layer of ground structure 2 to define a back cavity with the first layer of ground structure 2, so as to suppress the coupling between units and (for the metasurface system 100 having multiple arrays Waveguide modes in the array (in the case of metasurface units 100a arranged in a staggered manner).
  • the back cavity structure 9 includes a metal frame 91 and a plurality of conductive pillars 92, and the plurality of conductive pillars 92 are correspondingly connected to the metal frame 91, the first layer ground structure 2 and the second layer ground structure 4, so that the back cavity is defined between the metal frame 91 and the first layer ground structure 2, and an isolation cavity is defined between the first layer ground structure 2 and the second layer ground structure 4.
  • Both the back cavity and the isolation cavity can suppress the coupling between the units and (for the case where there are multiple array-arranged supersurface units 100a in the supersurface system 100) the waveguide mode in the array, and the plurality of conductive pillars 92 simultaneously connect the first layer ground structure 2 and the second layer ground structure 4, instead of separately setting conductive pillars to connect the metal frame 91 and the first layer ground structure 2, and to connect the first layer ground structure 2 and the second layer ground structure 4.
  • the embodiment of the present application adopts a shared conductive pillar 92, which has a simpler structure and is easier to manufacture.
  • FIG. 11 is an isolation curve diagram between two polarizations.
  • the isolation of the unit in the entire frequency band of 26-28 GHz is higher than -15 dB.

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  • Electromagnetism (AREA)
  • Aerials With Secondary Devices (AREA)

Abstract

本申请公开了一种超表面单元以及超表面系统，其中，超表面单元包括依次分层设置的双极化超表面辐射结构、第一层地结构、隔离结构、第二层地结构以及控制结构，其中，所述双极化超表面辐射结构包括辐射贴片，所述控制结构与所述辐射贴片之间通过连接通路结构连接，所述连接通路结构包括两个并联设置的连接件，所述两个连接件自所述隔离结构所在层延伸至所述辐射贴片，所述隔离结构包括对应于每一所述连接件导接的隔离片，所述隔离片用以反射射频波。

Description

超表面单元以及超表面系统
相关申请
本申请要求于2023年1月12号申请的、申请号为202310074667.5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
本申请涉及通讯技术领域，特别涉及一种超表面单元以及超表面系统。
背景技术
超表面因其高效低成本调控空间电磁波的能力得到了广泛的研究，超表面在由单极化过渡到双极化超表面时，会存在极化串扰、交直流隔离和表面波的问题，因而现有的研究大多集中在单比特单极化的情形下。
目前在解决双极化超表面间极化串扰问题时，一般采用对称设计，但是这样会使得可调器件的数量增加一倍，在解决交直流隔离时，一般选择振子场最弱的点加偏压，但是这样限制了设计的灵活度；而在解决表面波串扰时一般采用通孔组成腔体，但是在很多情况下效果不佳。
申请内容
本申请的主要目的是提出一种超表面单元以及超表面系统，旨在能够解决极化串扰的问题，并且能够实现交直流隔离。
根据本申请实施例的第一方面，提出了一种超表面单元，包括依次分层设置的双极化超表面辐射结构、第一层地结构、隔离结构、第二层地结构以及控制结构，其中，
所述双极化超表面辐射结构包括辐射贴片；
所述控制结构与所述辐射贴片之间通过连接通路结构连接，所述连接通路结构包括两个并联设置的连接件，所述两个连接件至少自所述隔离结构所在层延伸至所述辐射贴片；
所述隔离结构包括对应与每一所述连接件导接的隔离片，所述隔离片用以反射射频波。
根据本申请实施例的第二方面，还提出了一种超表面系统，包括多个超表面单元，所述超表面单元包括依次分层设置的双极化超表面辐射结构、第一层地结构、隔离结构、第二层地结构以及控制结构，其中，
所述双极化超表面辐射结构包括辐射贴片；
所述控制结构与所述辐射贴片之间通过连接通路结构连接，所述连接通路结构包括两个并联设置的连接件，所述两个连接件自所述隔离结构所在层延伸至所述辐射贴片；
所述隔离结构包括对应与每一所述连接件导接的隔离片，所述隔离片用以反射射频波。
附图说明
为了更清楚地说明本申请实施例或现有技术中的技术方案，下面将对实施例或现有技术描述中所需要使用的附图作简单地介绍，显而易见地，下面描述中的附图仅仅是本申请的一些实施例，对于本领域普通技术人员来讲，在不付出创造性劳动的前提下，还可以根据这些附图示出的结构获得其他的附图。
图1为本申请提供的超表面系统的一实施例的示意图；
图2为本申请提供的超表面单元的一实施例的侧视示意图；
图3为图2的超表面单元的逻辑拓扑图；
图4为本申请提供的超表面单元的另一实施例的侧视示意图；
图5为本申请提供的超表面单元的又一实施例的立体示意图；
图6为图5的超表面单元的侧视结构图；
图7为图5的立体分解示意图；
图8为图5中超表面单元的俯视结构图；
图9为图5中超表面单元的隔离结构和连接通路结构的示意图；
图10为图5的超表面单元的辐射贴片和模式调节结构的结构示意图；
图11为图5的超表面单元的极化隔离曲线。
附图标号说明：
本申请目的的实现、功能特点及优点将结合实施例，参照附图做进一步说明。
具体实施方式
下面将结合本实用新型实施例中的附图，对本实用新型实施例中的技术方案进行清楚、完整地描述，显然，所描述的实施例仅仅是本实用新型的一部分实施例，而不是全部的实施例。基于本实用新型中的实施例，本领域普通技术人员在没有作出创造性劳动前提下所获得的所有其他实施例，都属于本实用新型保护的范围。
需要说明，若本实用新型实施例中有涉及方向性指示(诸如上、下、左、右、前、后……)，则该方向性指示仅用于解释在某一特定姿态(如附图所示)下各部件之间的相对位置关系、运动情况等，如果该特定姿态发生改变时，则该方向性指示也相应地随之改变。
另外，若本实用新型实施例中有涉及“第一”、“第二”等的描述，则该“第 一”、“第二”等的描述仅用于描述目的，而不能理解为指示或暗示其相对重要性或者隐含指明所指示的技术特征的数量。由此，限定有“第一”、“第二”的特征可以明示或者隐含地包括至少一个该特征。另外，全文中出现的“和/或”的含义，包括三个并列的方案，以“A和/或B”为例，包括A方案、或B方案、或A和B同时满足的方案。另外，各个实施例之间的技术方案可以相互结合，但是必须是以本领域普通技术人员能够实现为基础，当技术方案的结合出现相互矛盾或无法实现时应当认为这种技术方案的结合不存在，也不在本实用新型要求的保护范围之内。
超表面因其高效低成本调控空间电磁波的能力得到了广泛的研究，超表面在由单极化过渡到双极化超表面时，会存在极化串扰、交直流隔离和表面波的问题，因而现有的研究大多集中在单比特单极化的情形下。为了改善双极化串扰的问题，本申请提供了一种超表面单元和超表面系统。图1为本申请提供的一种超表面系统的一实施例，图2至图8为本申请提供的一种超表面单元的一实施例。
请参阅图1，本申请提出的一种超表面系统100，其中，所述超表面系统100包括多个超表面单元100a，在本申请的一实施例中，所述多个超表面单元100a呈矩阵式排布，显然本设计不限于此，所述多个超表面单元100a的具体排布方式可以视实际需要而进行设计，并且所述多个超表面单元100a的具体数量也不做限制。
请参阅图2，图2提供了超表面单元的一实施例的侧视示意图，所述超表面单元100a包括依次分层设置的双极化超表面辐射结构1、第一层地结构2、隔离结构3、第二层地结构4以及控制结构5。
所述双极化超表面辐射结构1包括辐射贴片11，所述控制结构5与所述辐射贴片11之间通过连接通路结构7连接，所述连接通路结构7包括两个并联设置的连接件71，所述两个连接件71至少自所述隔离结构3所在层延伸至所述辐射贴片11。所述隔离结构3包括对应与每一所述连接件71导接的隔离片30，所述隔离片30用以反射射频波。
在本申请的技术方案中，连接通路结构7在隔离结构3与辐射贴片11之间分为并联的两个连接件71，并且所述隔离结构3对应每一所述连接件71设置有隔离片30，如此，自控制结构5输入至双极化超表面辐射结构1的数字 信号，能够分别自两个连接件71进入至辐射贴片11，而自辐射贴片11来了双极化的射频信号，会在两个连接件71处分开，且分别经过隔离片30反射至所述辐射贴片11，而避免两者之间相互影响，并且避免射频信号传导至控制结构5而影响控制结构5工作，如此可以实现交直流隔离即数字信号与射频信号的隔离，且能够解决双极化超表面的极化串扰的问题。
请进一步参阅图2所示，在本申请的实施例中，所述连接通路结构7还包括一主路70，所述主路70的一端连接所述控制结构5，另一端与所述两个连接件71连接，也即所述控制结构5上可以设置一个端口，通过一个端口来控制两个极化，如此可以减少端口设置的数量。
请进一步参阅图3，图3为图2提供的超表面单元的逻辑拓扑图，在该示意图中，可以示出，本申请的实施例中的超表面单元100a的控制方式采用总(控制结构5)-分(两个连接件71)-总(辐射贴片11)的形式。
显然，所述连接通路结构7不必设置主路70，在本申请的另一实施例中，如图4，所示，在该实施例中，所述两个连接件4一端延伸至控制结构5，以与所述控制结构5直接连接。
图5至图11为本申请提供的超表面单元又一实施例。
请参阅图5，在本申请的实施例中，所述隔离结构3分为两层，以实现两层的隔离，具体见后续部分有相关介绍，显然本设计不限于此，所述隔离结构3可以为一层和两层以上。在该实施例中，所述控制结构5背向所述第二层地结构的一侧设置有第三层地结构6，所述控制结构5与所述第三层地结构6电连接，以实现对所述控制结构5所在层的接地保护。
在一实施方式中，参阅图6，图6为图5的侧视图，在图6中进一步可以示出双极化超表面辐射结构1、第一层地结构2、隔离结构3、第二层地结构4、控制结构5以及第三层地结构6的分层情况，其中，隔离结构3分为两层，两层所述隔离结构3分别对应设置有第一隔离片31和第二隔离片32，具体见后续部分有介绍。
请参阅图7，在本申请的实施例中，所述隔离结构3包括分层设置的第一隔离片31和第二隔离片32，所述第一隔离片31和所述第二隔离片32用以分别反射射频波，所述第一隔离片31和所述第二隔离片32可以反射同一频段的射频波，也可以是反射不同波段的射频波，每一所述连接件71连接一所述 第一隔离片31和一所述第二隔离片32，通过设置多层(2层)隔离片30，可以更好地实现对射频波的反射，以更好地实现交直流隔离。
具体地，在本申请的实施例中，所述第一隔离片31呈矩形设置，所述第二隔离片32呈弧形设置，显然本申请不限于此，所述第一隔离片31和所述第二隔离片32的形状还可以是其他形成，例如多边形等等，其形状的差异和面积的差异，反射的频段也会存在差异，具体根据设计的需要可以进行调整。
请参阅图8和9，且一并参阅图7，在本申请的一实施例中，所述连接通路结构7还包括偏离所述两个连接件71设置的转接件72，所述转接件72的一端与所述控制结构5连接，所述转接件72的另一端通过连接枝节73与所述两个连接件71连接，如此，在所述控制结构5与两个所述连接件71之间通过所述转接件72连接，如此能够延长控制结构5到隔离结构3之间的路径，进而可以进一步减少自辐射贴片11的射频信号经过隔离结构3之后的剩余射频信号，传导至控制结构5。
请参阅图10，在本申请的实施例中，所述辐射贴片11的两侧边设置有对应控制两个极化的两个模式调节结构8，每一所述模式调节结构8包括与所述辐射贴片11的周侧连接的第一枝节81、与所述第一层地结构2连接的第二枝节82、以及连接所述第一枝节81和所述第二枝节82的通断器件83，通过控制通断器件83的双极化超表面辐射结构1的工作模式，从而调整其电磁响应，使其反射的电磁波能够产生相位差，例如，在本申请的实施例中，所述相位差为180°的相差。所述通断器件83的具体结构不限，可以是PIN管、变容管、开关、MEMS管和非易失性器件中的一种。
请参阅图5和图7，在本申请的实施例中，所述第一层地结构2与所述第二层地结构3通过多个导电结构导接，以在两者之间限定出一隔离腔，所述隔离结构3设置在所述隔离腔中，如此能够抑制单元之间的耦合和(对于超表面系统100存在多个阵列式排布的超表面单元100a的情况下)阵列中的波导模式。
请参阅图5和图7，在本申请的实施例中，所述超表面单元100a还包括背腔结构9，所述背腔结构9设于所述双极化超表面辐射结构1的一侧，所述背腔结构9与所述第一层地结构2导接，以与所述第一层地结构2限定出一背腔，如此能够抑制单元之间的耦合和(对于超表面系统100存在多个阵列 式排布的超表面单元100a的情况下)阵列中的波导模式。
在本申请的一实施例中，所述背腔结构9包括金属框91和多个导电柱92，所述多个导电柱92对应连接所述金属框91、第一层地结构2和所述第二层地结构4，以使得所述金属框91和所述第一层地结构2之间限定出所述背腔，所述第一层地结构2与所述第二层接结构4之间限定出隔离腔，所述背腔和所述隔离腔均能够抑制单元之间的耦合和(对于超表面系统100存在多个阵列式排布的超表面单元100a的情况下)阵列中的波导模式，并且，所述多个导电柱92同时将所述第一层地结构2和所述第二层地结构4连接，而不是分别设置导电柱将所述金属框91和第一层地结构2连接，将所述第一层地结构2和所述第二层地结构4连接，本申请的实施例采用共用导电柱92的方式，结构更为简单且易于制造。
请参阅图11，在本申请的实施例中，图11为两个极化之间的隔离曲线图，单元在26-28GHz整个频段内的隔离度均高于-15dB。
以上所述仅为本申请的可选实施例，并非因此限制本申请的专利范围，凡是在本申请的申请构思下，利用本申请说明书及附图内容所作的等效结构变换，或直接/间接运用在其他相关的技术领域均包括在本申请的专利保护范围内。

Claims (10)

  1. 一种超表面单元，包括依次分层设置的双极化超表面辐射结构、第一层地结构、隔离结构、第二层地结构以及控制结构，其中，
    所述双极化超表面辐射结构包括辐射贴片；
    所述控制结构与所述辐射贴片之间通过连接通路结构连接，所述连接通路结构包括两个并联设置的连接件，所述两个连接件至少自所述隔离结构所在层延伸至所述辐射贴片；
    所述隔离结构包括对应与每一所述连接件导接的隔离片，所述隔离片用以反射射频波。
  2. 如权利要求1所述的超表面单元，其中，所述隔离结构包括分层设置的第一隔离片和第二隔离片，所述第一隔离片和所述第二隔离片用以分别反射射频波；
    每一所述连接件连接一所述第一隔离片和一所述第二隔离片。
  3. 如权利要求1所述的超表面单元，其中，所述连接通路结构还包括偏离所述两个连接件设置的转接件，所述转接件的一端与所述控制结构连接，所述转接件的另一端通过连接枝节与所述两个连接件连接。
  4. 如权利要求1所述的超表面单元，其中，所述辐射贴片的两侧边设置有对应控制两个极化的两个模式调节结构，每一所述模式调节结构包括与所述辐射贴片的周侧连接的第一枝节、与所述第一层地结构连接的第二枝节、以及连接所述第一枝节和所述第二枝节的通断器件。
  5. 如权利要求1所述的超表面单元，其中，所述连接通路结构还包括一主路，所述主路的一端连接所述控制结构，另一端与所述两个连接件连接。
  6. 如权利要求1所述的超表面单元，其中，所述第一层地结构与所述第二层地结构通过多个导电结构导接，以在两者之间限定出一隔离腔。
  7. 如权利要求1所述的超表面单元，其中，所述超表面单元还包括背腔结构，所述背腔结构设于所述双极化超表面辐射结构的一侧，所述背腔结构与所述第一层地结构导接，以与所述第一层地结构限定出一背腔。
  8. 如权利要求7所述的超表面单元，其中，所述背腔结构包括：
    金属框；以及，
    多个导电柱，对应连接所述金属框、第一层地结构和所述第二层地结构，以使得所述金属框和所述第一层地结构之间限定出所述背腔，所述第一层地结构与所述第二层接结构之间限定出隔离腔。
  9. 如权利要求1所述的超表面单元，其中，所述超表面单元还包括第三层地结构，所述第三层地结构设置在所述控制结构背对所述第二层地结构的一侧。
  10. 一种超表面系统，包括多个如权利要求1至9任意一项所述的超表面单元。
PCT/CN2024/070658 2023-01-12 2024-01-04 超表面单元以及超表面系统 Ceased WO2024149154A1 (zh)

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