WO2022262876A1 - 基于新型顺序旋转馈电网络的高增益和低rcs的宽带圆极化超表面天线 - Google Patents

基于新型顺序旋转馈电网络的高增益和低rcs的宽带圆极化超表面天线 Download PDF

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WO2022262876A1
WO2022262876A1 PCT/CN2022/110444 CN2022110444W WO2022262876A1 WO 2022262876 A1 WO2022262876 A1 WO 2022262876A1 CN 2022110444 W CN2022110444 W CN 2022110444W WO 2022262876 A1 WO2022262876 A1 WO 2022262876A1
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metal layer
metal
gain
rcs
circularly polarized
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PCT/CN2022/110444
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English (en)
French (fr)
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许锋
赵晓飞
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南京邮电大学
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Priority to US18/008,182 priority Critical patent/US11888224B2/en
Publication of WO2022262876A1 publication Critical patent/WO2022262876A1/zh

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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00—Details of, or arrangements associated with, antennas
    • H01Q1/36—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith
    • H01Q1/38—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith formed by a conductive layer on an insulating support
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00—Details of, or arrangements associated with, antennas
    • H01Q1/50—Structural association of antennas with earthing switches, lead-in devices or lightning protectors
    • 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
    • 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
    • H01Q21/00—Antenna arrays or systems
    • H01Q21/0006—Particular feeding systems
    • H01Q21/0075—Stripline fed arrays
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q21/00—Antenna arrays or systems
    • H01Q21/06—Arrays of individually energised antenna units similarly polarised and spaced apart
    • H01Q21/061—Two dimensional planar arrays
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q3/00—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system
    • H01Q3/26—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system varying the relative phase or relative amplitude of energisation between two or more active radiating elements; varying the distribution of energy across a radiating aperture
    • H01Q3/30—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system varying the relative phase or relative amplitude of energisation between two or more active radiating elements; varying the distribution of energy across a radiating aperture varying the relative phase between the radiating elements of an array
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q3/00—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system
    • H01Q3/26—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system varying the relative phase or relative amplitude of energisation between two or more active radiating elements; varying the distribution of energy across a radiating aperture
    • H01Q3/30—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system varying the relative phase or relative amplitude of energisation between two or more active radiating elements; varying the distribution of energy across a radiating aperture varying the relative phase between the radiating elements of an array
    • H01Q3/34—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system varying the relative phase or relative amplitude of energisation between two or more active radiating elements; varying the distribution of energy across a radiating aperture varying the relative phase between the radiating elements of an array by electrical means
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
    • Y02D30/00—Reducing energy consumption in communication networks
    • Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks

Definitions

  • the invention belongs to the field of microwave antennas, and in particular relates to a high-gain and low-RCS broadband circularly polarized metasurface antenna based on a novel sequential rotating feed network.
  • radar One of the largest application areas for antennas is radar.
  • radar domes were usually specially designed to reduce the intensity of detection, that is, to reduce the radar cross section (RCS).
  • RCS radar cross section
  • Linearly polarized antennas are very poor in anti-interference and require high polarization for receiving antennas, while circularly polarized waves can have strong anti-multipath effects. , and even a linearly polarized receiving antenna can achieve 50% receiving efficiency. Therefore, circularly polarized antennas are of great research value in air-to-air communications.
  • the research of broadband antenna is more important, more and more electromagnetic frequency bands are used, and the amount of communication data is increasing.
  • the metasurface has been verified as a broadband antenna, but the research on broadband circular polarization is very scarce in the research of circularly polarized metasurface antennas, which leads to the low utilization rate of the antenna. Therefore, it is necessary to further explore the bandwidth of circularly polarized antennas.
  • the present invention uses a high-gain and low-RCS broadband circularly polarized metasurface antenna based on a new sequential rotating feed network, which not only greatly widens the bandwidth of circular polarization, but also improves the antenna Bandwidth utilization, but also has the characteristics of low RCS, high gain and miniaturization.
  • a high-gain and low-RCS broadband circularly polarized metasurface antenna based on a new sequential rotating feed network including a first metal layer, a first dielectric substrate, a second metal layer, and a second dielectric substrate arranged in sequence from top to bottom, The third metal layer, the fourth metal layer, the third dielectric substrate, and the fifth metal layer;
  • the structures of the first metal layer and the third metal layer are both composed of 2*2 large arrays, and each large array is composed of 5*5 rectangular metal sheets inclined at 45 degrees and equipped with four metal strips.
  • the four sides of each metal sheet are grooved and a metal branch is introduced to form a square metal unit, forming a large array of square metals, and the large arrays are rotationally symmetrical to each other;
  • the second metal layer is a 10*10 square metal array whose period is equal to that of the first layer and the third metal layer, and each unit is a square metal ring;
  • the fourth metal layer is a whole piece of metal with four slits removed, and the four slits are mutually rotationally symmetrical;
  • the fifth metal layer is a mixed sequential rotating feed network, which is composed of microstrip lines.
  • the input end microstrip line is divided into two ports by an equal power divider, one of which is connected to a section of C-type microstrip coupling line, and then It is divided into two circuits by an equal power divider.
  • These two routes are composed of C-type coupling lines with a fixed phase difference.
  • the other port is connected to a delay line and then connected to the same structure. This delay line has a fixed phase difference. .
  • first and second The number and spacing of the square metals in the three metal layers are determined according to the design index.
  • the distance between the third metal layer and the fourth metal layer is determined according to the design frequency, that is, the working frequency of the antenna, and the metasurface.
  • the impedances of the microstrip line and the port are both 50 ohms.
  • the index of the C-type coupled line is determined by the phase of the design requirement.
  • phase of the delay line is 180 degrees.
  • the phase difference between the two lines composed of C-type coupled lines is fixed at 90 degrees.
  • the hybrid sequential rotating feed network divides one port into four ports, and the phase difference between the ports is 0 degree, 90 degree, 180 degree and 270 degree, and the phase difference is broadband to enhance the circular polarization bandwidth.
  • the present invention adopts the above technical scheme, and has the following technical effects: First, compared with the microstrip phase shifter composed of ordinary delay lines, the present invention uses a broadband phase shifting network, which is to realize the broadband circular pole Second, compared with the traditional sequential rotation network, the entire sequential rotation phase shift network is broadband; finally, the broadband sequential rotation phase shift network is combined with the metasurface antenna for the first time, and the broadband sequential rotation phase shift network It provides the possibility of wider circular polarization bandwidth, which can significantly improve the utilization rate of the metasurface antenna bandwidth, and solves the problems mentioned in the background art.
  • Fig. 1 is a schematic side view of an antenna in an embodiment of the present invention.
  • FIG. 2 is a schematic diagram of the arrangement position of the first and third metal layers, that is, the metasurface, in the embodiment of the present invention.
  • FIG. 3 is a schematic diagram of a second metal layer in an embodiment of the present invention.
  • FIG. 3 is a schematic diagram of the array unit structure of the first, second and third metal layers in an embodiment of the present invention.
  • FIG. 4 is a schematic diagram of the structure of the fourth metal layer in the embodiment of the present invention.
  • Fig. 5 is a schematic diagram of the fifth metal layer in the embodiment of the present invention, that is, the structure of the novel rotating feed network.
  • Fig. 6 is a diagram of simulated and measured S parameters in the embodiment of the present invention.
  • Fig. 7 is the simulated and measured axial ratio diagram and gain diagram in the embodiment of the present invention.
  • Fig. 8 is a simulation and actual measurement direction diagram in the embodiment of the present invention.
  • Fig. 9 is a diagram of the simulation results of the RCS in the embodiment of the present invention.
  • the invention provides a high-gain and low-RCS broadband circularly polarized metasurface antenna based on a novel sequential rotating feed network. Its structural diagram is shown in Figures 1 to 6, and the results of simulation and actual testing are shown in Figures 7 to 10.
  • Figure 1 is a side view of the structure, which clearly shows the relative positions of the three-layer dielectric substrate and the five-layer metal layer, and reflects the distance between the fourth metal layer and the third metal layer, in which the dielectric substrates are all Rogers4003C , the relative permittivity is 3.55, between the first layer and the second layer is a medium of height t, between the second layer and the third layer is a medium of height t, between the third layer and the fourth layer is The air with a height of H, and the medium with a height of hs between the fourth and fifth layers;
  • Figure 2 shows the arrangement of the metasurface array units composed of rectangular metal sheets at the top view position;
  • Figure 3 shows the second metal The structure of the layer;
  • Figure 4(a) is an
  • the simulation and measurement results of the embodiment are shown in Figures 7 to 10, the axial ratio is less than 3dB in the range of 6.5GHz-9.55GHz, the maximum gain is 7.1dB, and the 3-dB gain drop bandwidth is 7.5GHz-9GHz. According to the experience of taking the minimum bandwidth, the final circular polarization bandwidth is 6.5GHz-9.55GHz, that is, 38%. According to the data of specific structural parameters given above, the electrical size of the metasurface array is calculated to be 1.54 ⁇ *1.54 ⁇ , that is, 2.37 ⁇ 2 . Take 3 frequency points evenly within the bandwidth to examine the two-dimensional patterns of two orthogonal sections, which are 7GHz, 8GHz and 9GHz.
  • the common polarization of the antenna is left-handed circular polarization (LHCP) and the cross-polarization is right-handed circular polarization (RHCP). From the pattern of the three frequency points, it can be inferred that the main polarization and cross polarization ratio of the antenna is greater than 20dB, the front-to-back ratio is greater than 15dB, and the radiation characteristics have good circular polarization purity and directivity within the entire operating frequency range.
  • Figure 10 is the RCS simulation diagram. The RCS is simulated at two angles and then the unloaded metasurface is used as a reference. It can be seen that the RCS has a significant weakening at 4GHz-9GHz, and the maximum weakening is 13dB.

Abstract

基于新型顺序旋转馈电网络的高增益和低RCS的宽带圆极化超表面天线，包含三层介质基板和五层金属层以及三个电阻。从上到下描述为：第一金属层，第一介质基板，第二金属层，第二介质基板，第三金属层，第四金属层，第三介质基板，第五金属层。前三层金属层都是10*10的金属贴片构成的超表面阵列；第四金属与第三金属通过距离构成谐振腔；第四金属层上有旋转对称的四个缝隙；第五金属层是由微带线构成的混合馈电网络，包含三个等分功分器和三个电阻，将一个端口分为相位差为0度、90度、180度和270度且具有宽带特性的四个端口；四个端口为四个缝隙供能，使超表面阵列辐射圆极化波。本发明在低RCS的前提下提高了圆极化波辐射的带宽和增益。

Description

基于新型顺序旋转馈电网络的高增益和低RCS的宽带圆极化超表面天线 技术领域
本发明属于微波天线领域，具体涉及一种基于新型顺序旋转馈电网络的高增益和低RCS的宽带圆极化超表面天线。
背景技术
天线的最大应用领域之一就是雷达。在早期，雷达为了不被发现，通常专门设计雷达罩来降低被探测的强度，即降低雷达散射截面(RCS)。现在，越来越多的阵列能在辐射的同时够实现低RCS，这是很有必要的研究
无线通信中的信号衰落可以用多径效应解释，线极化天线在抗干扰方面非常差，并且对接受天线的极化要求较高，而圆极化波能够有很强的抗多径效应能力，并且，即使是线极化的接受天线也能达到50％的接收效率。所以圆极化天线在对空的通信中非常有研究价值。
宽带天线的研究更加重要，电磁波频段被使用的越来越多，通信数据量越来越大。超表面已经被验证是一种宽带天线，但是在圆极化超表面的天线研究中对宽带圆极化的研究甚为匮乏，这导致天线的利用率并不高。所以，进一步探讨圆极化天线的带宽是很有必要的。
发明内容
为了解决背景技术中提到的技术问题，本发明使用基于新型顺序旋转馈电网络的高增益和低RCS的宽带圆极化超表面天线，不但极大的展宽了圆极化的带宽，提高天线带宽的利用率，而且同时具有低 RCS，高增益和小型化的特点。
本发明的目的将通过以下技术方案得以实现：
基于新型顺序旋转馈电网络的高增益和低RCS的宽带圆极化超表面天线，包括由上至下依次设置的第一金属层，第一介质基板，第二金属层，第二介质基板，第三金属层，第四金属层，第三介质基板，第五金属层；
所述第一金属层和第三金属层的结构均由2*2的大阵列组成，每个大阵列是由5*5个倾斜45度并设有四个条状金属的矩形金属片组成，每个金属片的四个边都挖槽且引入一个金属支节，形成一个方形金属单元，组成方形金属的大阵列，大阵列相互之间呈中心旋转对称；
所述第二金属层是一个10*10的方形金属阵列，其周期与第一层和第三金属层相等，每个单元是正方形的金属环；
所述第四金属层为挖去四个缝隙的整块金属，四个缝隙之间相互旋转对称；
所述第三金属和第四层金属之间具有一定的距离以构成一个谐振腔，使得电磁波在该距离上正向叠加以提高辐射的增益；
所述第五金属层是混合顺序旋转馈电网络，由微带线组成，输入端微带线由一个等分功分器分成两个端口，其中一个端口接一段C型微带耦合线，然后由一个等分功分器再分成两路，这两路由C型耦合线组成，具有固定的相位差，另一个端口接一段延迟线后接上相同的结构，该段延迟线有固定的相位差。
进一步地，所述第一、二。三金属层中的方形金属的个数和间距 大小根据设计指标确定。
进一步地，所述第三金属层和第四金属层之间距离根据设计频率即天线的工作频率和超表面确定。
进一步地，所述微带线和端口的阻抗均为50欧姆。
进一步地，所述C型耦合线的指标由设计需求的相位决定。
进一步地，所述延迟线的相位为180度。
进一步地，所述第四金属层中，由C型耦合线组成的两路的相位差固定为90度。
进一步地，所述混合顺序旋转馈电网络将一端口分为四端口，端口之间实现的相位差为0度，90度，180度和270度，并且相位差是宽带的以增强圆极化带宽。
本发明采用以上技术方案与现有的技术相比，具有以下技术效果：首先，与普通的延迟线构成的微带移相器相比，本发明使用了宽带移相网络，是实现宽带圆极化的重要保证；其次，与传统的顺序旋转网络相比，整个顺序旋转相位都是宽带的；最后，该宽带顺序旋转移相网络第一次与超表面天线相结合，宽带顺序旋转移相网络为更宽的圆极化带宽提供了可能，这能够明显提高超表面天线带宽的利用率，解决了背景技术中提到的问题。
附图说明
图1是本发明实施例中的天线侧面示意图。
图2是本发明实施例中的第一、三金属层即超表面排列位置的示意图。
图3是本发明实施例中的第二金属层的示意图。
图3是本发明实施例中的第一、二和三金属层的阵列单元结构的示意图。
图4是本发明实施例中的第四金属层结构示意图。
图5是本发明实施例中的第五金属层即新型旋转馈电网络结构的示意图。
图6是本发明实施例中的仿真和实测的S参数图。
图7是本发明实施例中的仿真和实测的轴比图和增益图。
图8是本发明实施例中的仿真和实测的方向图。
图9是本发明实施例中的RCS的仿真结果图。
具体实施方式
下面结合说明书附图对本发明的技术方案做进一步的详细说明。
本发明提供一种基于新型顺序旋转馈电网络的高增益和低RCS的宽带圆极化超表面天线。其结构示意如图1到图6所示，仿真和实际测试的结果绘于图7到图10。图1是结构的侧视图，它清晰显示了三层介质基板和五层金属层的相对位置，并体现了第四层金属层和第三层金属层之间的距离，其中介质基板均为Rogers4003C，相对介电常数为3.55，第一层和第二层之间是高度为t的介质，第二层和第三层之间是高度为t的介质，第三层和第四层之间是高度为H的空气，第四层和第五层之间是高度为hs的介质；图2显示了由矩形金属片组成的超表面阵列单元在俯视位置的排列情况；图3显示了第二金属层的结构；图4(a)是上两层介质层和三层金属层构成的阵列单元， 第一层金属层和第三层金属层的结构一样，为图4(b)所示，金属单元在长方形的基础上引入四个条状金属，这能够降低单元工作的频率进而缩小电尺寸；图4(c)是第二金属层的单元结构，每个单元为方形的金属环；图5是第四层金属层，在整个金属上挖去四个呈中心旋转对称的缝隙用于给超表面阵列馈电，相当于超表面阵列的源天线；图6是顺序旋转的宽带馈电网络，为第四层四个缝隙提供具有一定相位差的馈电以使的激发的超表面阵列辐射出圆极化波。
实施例中的参数值为：ml＝5.6mm，mw＝2.4mm，c1＝4mm，c2＝3.8mm，lf1＝2.6mm，lf2＝1mm，wf＝0.3mm，wz＝0.2mm，p＝5.8mm，t＝1.524mm，wo＝0.98mm，wd＝0.24mm，s＝8.8mm，w＝0.5mm，H＝15mm，hs＝0.508mm，ax＝5.6mm(该部分是多出的介质基板，用于多层基板的固定)，ls＝22mm，ws＝1.5mm，wm＝1.1mm，ld＝4.4mm，n1＝2.7mm，n2＝11.2mm，n3＝11.1mm，n4＝8.1mm，l1＝11.2mm，l2＝20.1mm，l3＝2.6mm，dm＝0.62mm，wd2＝0.035mm，wo2＝0.56mm。
实施例的仿真和测量结果如图7到图10所示，在6.5GHz-9.55GHz的范围内轴比小于3dB，增益最大值为7.1dB，3-dB增益下降带宽为7.5GHz-9GHz。根据带宽取最小的经验，最终的圆极化带宽为6.5GHz-9.55GHz，即38％。根据上文给出的具体结构参数的数据计算出超表面阵列的电尺寸为1.54λ*1.54λ，即2.37λ 2。在带宽内均匀取3个频点考查两个正交截面的二维方向图，分别是7GHz、8GHz和9GHz。可以看出天线的共极化为左旋圆极化(LHCP)而交叉极化为右旋圆极化(RHCP)。从三个频点的方向图可以推断出在整个工 作频率范围内天线的主极化和交叉极化比大于20dB，前后比大于15dB，辐射特性具有很好的圆极化纯度和定向性。图10为RCS仿真图，在两个角度仿真了RCS然后以未加载超表面的为参考，可以看出RCS在4GHz-9GHz有明显的减弱，最大处减弱了13dB。
以上所述仅为本发明的较佳实施方式，本发明的保护范围并不以上述实施方式为限，但凡本领域普通技术人员根据本发明所揭示内容所作的等效修饰或变化，皆应纳入权利要求书中记载的保护范围内。

Claims (8)

  1. 基于新型顺序旋转馈电网络的高增益和低RCS的宽带圆极化超表面天线，包括由上至下依次设置的第一金属层，第一介质基板，第二金属层，第二介质基板，第三金属层，第四金属层，第三介质基板，第五金属层，其特征在于：
    所述第一金属层和第三金属层的结构均由2*2的大阵列组成，每个大阵列是由5*5个倾斜45度并设有四个条状金属的矩形金属片组成，每个金属片的四个边都挖槽且引入一个金属支节，形成一个方形金属单元，组成方形金属的大阵列，大阵列相互之间呈中心旋转对称；
    所述第二金属层是一个10*10的方形金属阵列，其周期与第一层和第三金属层相等，每个单元是正方形的金属环；
    所述第四金属层为挖去四个缝隙的整块金属，四个缝隙之间相互旋转对称；
    所述第三金属和第四层金属之间具有一定的距离以构成一个谐振腔，使得电磁波在该距离上正向叠加以提高辐射的增益；
    所述第五金属层是混合顺序旋转馈电网络，由微带线组成，输入端微带线由一个等分功分器和电阻分成两个端口，其中一个端口接一段C型微带耦合线，然后由一个等分功分器和电阻再分成两路，这两路由C型耦合线组成，具有固定的相位差，另一个端口接一段延迟线后接上相同的结构，该段延迟线有固定的相位差。
  2. 根据权利要求1所述的基于新型顺序旋转馈电网络的高增益和低RCS的宽带圆极化超表面天线，其特征在于：所述第一、二、三金属层中的方形金属的个数和间距大小根据设计指标确定。
  3. 根据权利要求1所述的基于新型顺序旋转馈电网络的高增益和低RCS的宽带圆极化超表面天线，其特征在于：所述第三金属层和第四金属层之间距离根据设计频率和超表面确定。
  4. 根据权利要求1所述的基于新型顺序旋转馈电网络的高增益和低RCS的宽带圆极化超表面天线，其特征在于：所述微带线和端口的阻抗均为50欧姆。
  5. 根据权利要求1所述的基于新型顺序旋转馈电网络的高增益和低RCS的宽带圆极化超表面天线，其特征在于：所述C型耦合线的指标由设计需求的相位决定。
  6. 根据权利要求1所述的基于新型顺序旋转馈电网络的高增益和低RCS的宽带圆极化超表面天线，其特征在于：所述延迟线的相位为180度。
  7. 根据权利要求1所述的基于新型顺序旋转馈电网络的高增益和低RCS的宽带圆极化超表面天线，其特征在于：所述第四金属层中，由C型耦合线组成的两路的相位差固定为90度。
  8. 根据权利要求1所述的基于新型顺序旋转馈电网络的高增益和低RCS的宽带圆极化超表面天线，其特征在于：所述混合顺序旋转馈电网络将一端口分为四端口，端口之间实现的相位差为0度，90度，180度和270度，并且相位差是宽带的以增强圆极化带宽。
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