CN118017215A - Circular polarization energy selection antenna and branch protection structure for Beidou navigation - Google Patents
Circular polarization energy selection antenna and branch protection structure for Beidou navigation Download PDFInfo
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Abstract
本发明涉及一种用于北斗导航的圆极化能量选择天线及枝节防护结构，其中，天线包括介质基板，在介质基板相对两侧分别设置的第一电磁感应结构和第二电磁感应结构，嵌入在介质基板的同轴探针；同轴探针与第一电磁感应结构相连接；第一电磁感应结构包括：第一金属结构和与第一金属结构相连接的枝节防护结构；枝节防护结构包括：第二金属结构和二极管；第二金属结构呈轴对称结构，且第二金属结构具有两个对称分布的支脚部分；二极管与支脚部分一一对应的设置；二极管与第一金属结构相连接。本发明通过设置的“龙门”型枝节防护结构，使得枝节防护结构与圆极化天线相结合，实现了小型化、一体化的能量选择天线设计。
The present invention relates to a circularly polarized energy selective antenna and a branch protection structure for Beidou navigation, wherein the antenna comprises a dielectric substrate, a first electromagnetic induction structure and a second electromagnetic induction structure respectively arranged on opposite sides of the dielectric substrate, and a coaxial probe embedded in the dielectric substrate; the coaxial probe is connected to the first electromagnetic induction structure; the first electromagnetic induction structure comprises: a first metal structure and a branch protection structure connected to the first metal structure; the branch protection structure comprises: a second metal structure and a diode; the second metal structure is an axisymmetric structure, and the second metal structure has two symmetrically distributed leg parts; the diode is arranged in a one-to-one correspondence with the leg part; the diode is connected to the first metal structure. The present invention combines the branch protection structure with the circularly polarized antenna by setting a "gantry" type branch protection structure, thereby realizing a miniaturized and integrated energy selective antenna design.
Description
技术领域Technical Field
本发明涉及天线技术领域，尤其涉及一种用于北斗导航的圆极化能量选择天线及枝节防护结构。The present invention relates to the field of antenna technology, and in particular to a circularly polarized energy selective antenna and a branch protection structure for Beidou navigation.
背景技术Background technique
随着卫星通信技术的发展，全球卫星定位与通信系统由其覆盖范围广、定位精度高和响应速度快等优点被广泛应用于各个领域。With the development of satellite communication technology, global satellite positioning and communication systems have been widely used in various fields due to their advantages such as wide coverage, high positioning accuracy and fast response speed.
强电磁脉冲是一种高能量的脉冲电磁场，根据其脉冲源的类型可分为自然电磁脉冲和人工电磁脉冲两类。这些电磁脉冲具有其峰值场强高，脉冲前沿短、不受气候影响等特点，可以通过多种途径耦合进入电子系统，对系统的正常工作造成不同程度的影响。Strong electromagnetic pulse is a high-energy pulse electromagnetic field, which can be divided into natural electromagnetic pulse and artificial electromagnetic pulse according to the type of pulse source. These electromagnetic pulses have the characteristics of high peak field strength, short pulse front, and no influence of climate. They can be coupled into electronic systems through various channels, causing different degrees of influence on the normal operation of the system.
电磁脉冲的耦合途径主要分为“前门”耦合和“后门”耦合两类。“前门”耦合是通过射频天线前端耦合进入天线的接收链路中，继而进入到接收机的敏感部件中对接收机造成影响。“后门”耦合则是通过电子系统的屏蔽壳体上的孔缝等结构的泄露使电磁脉冲场进入设备内部，或者在设备之间的互连线缆上感应出大电流继而沿线缆进入设备内部。The coupling pathways of electromagnetic pulses are mainly divided into two categories: "front door" coupling and "back door" coupling. "Front door" coupling is through the front end of the RF antenna coupling into the antenna's receiving link, and then enters the sensitive components of the receiver to affect the receiver. "Back door" coupling is through the leakage of holes and other structures on the shielding shell of the electronic system, allowing the electromagnetic pulse field to enter the device, or inducing a large current on the interconnection cable between devices and then entering the device along the cable.
现有北斗导航圆极化天线并未进行特殊设计使其具备对强电磁脉冲的防护功能，从而导致现有的北斗导航圆极化天线易受强电磁脉冲的干扰或毁伤，而现有的针对强电磁脉冲的“前门”防护手段，例如能量选择表面则存在着防护手段成本高，系统复杂度高等不足，难以应用于北斗导航圆极化天线的强电磁脉冲的防护。针对北斗导航圆极化天线防护需求这一现状，如何解决诸如能量选择表面等前门防护手段成本高、防护系统复杂度高等现有前门防护手段的不足成为一种亟待解决的问题。The existing Beidou navigation circularly polarized antenna is not specially designed to protect against strong electromagnetic pulses, which makes it vulnerable to interference or damage from strong electromagnetic pulses. The existing "front door" protection measures for strong electromagnetic pulses, such as energy selective surfaces, have the disadvantages of high cost and high system complexity, and are difficult to be applied to the protection of Beidou navigation circularly polarized antennas against strong electromagnetic pulses. In view of the current situation of the demand for Beidou navigation circularly polarized antenna protection, how to solve the disadvantages of existing front door protection measures such as energy selective surfaces, such as high cost and high complexity of the protection system, has become an urgent problem to be solved.
发明内容Summary of the invention
本发明的目的在于提供一种用于北斗导航的圆极化能量选择天线及枝节防护结构。The object of the present invention is to provide a circularly polarized energy selective antenna and a branch protection structure for Beidou navigation.
为实现上述发明目的，本发明提供一种用于北斗导航的圆极化能量选择天线，包括：介质基板，在所述介质基板相对两侧分别设置的第一电磁感应结构和第二电磁感应结构，嵌入在所述介质基板的同轴探针；To achieve the above-mentioned object of the invention, the present invention provides a circularly polarized energy selective antenna for Beidou navigation, comprising: a dielectric substrate, a first electromagnetic induction structure and a second electromagnetic induction structure respectively arranged on opposite sides of the dielectric substrate, and a coaxial probe embedded in the dielectric substrate;
所述同轴探针与所述第一电磁感应结构相连接；The coaxial probe is connected to the first electromagnetic induction structure;
所述第一电磁感应结构包括：第一金属结构和与所述第一金属结构相连接的枝节防护结构；The first electromagnetic induction structure includes: a first metal structure and a branch protection structure connected to the first metal structure;
所述枝节防护结构包括：第二金属结构和二极管；The branch protection structure includes: a second metal structure and a diode;
所述第二金属结构呈轴对称结构，且所述第二金属结构具有两个对称分布的支脚部分；The second metal structure is an axisymmetric structure, and the second metal structure has two symmetrically distributed supporting legs;
所述二极管与所述支脚部分一一对应的设置；The diodes are arranged in a one-to-one correspondence with the leg portions;
所述二极管与所述第一金属结构相连接。The diode is connected to the first metal structure.
根据本发明的一个方面，所述枝节防护结构中，两个所述二极管的设置方向为一致的；According to one aspect of the present invention, in the branch protection structure, the arrangement directions of the two diodes are consistent;
所述二极管采用PIN二极管。The diode is a PIN diode.
根据本发明的一个方面，在所述第一金属结构与所述第二金属结构之间，所述二极管的正极与所述第二金属结构相连接，其负极与所述第一金属结构相连接。According to one aspect of the present invention, between the first metal structure and the second metal structure, the anode of the diode is connected to the second metal structure, and the cathode of the diode is connected to the first metal structure.
根据本发明的一个方面，在所述第一电磁感应结构中，所述枝节防护结构对称的设置有多个。According to one aspect of the present invention, in the first electromagnetic induction structure, a plurality of branch protection structures are symmetrically arranged.
根据本发明的一个方面，所述第二金属结构还包括：用于连接所述支脚部分的支脚连接部分；According to one aspect of the present invention, the second metal structure further comprises: a foot connection portion for connecting the foot portion;
所述支脚连接部分和所述支脚部分分别为矩形金属片；The support leg connecting portion and the support leg portion are respectively rectangular metal sheets;
两个所述支脚部分分别与所述支脚连接部分长度方向的两端分别垂直连接，且两个所述支脚部分处于所述支脚连接部分长度方向的同一侧。The two support leg portions are respectively vertically connected to two ends of the support leg connecting portion in the length direction, and the two support leg portions are located on the same side of the support leg connecting portion in the length direction.
根据本发明的一个方面，所述第一金属结构包括：规则贴片部分，与所述规则贴片部分相连接的第一连接部分，与所述第一连接部分相连接的第二连接部分；According to one aspect of the present invention, the first metal structure comprises: a regular patch portion, a first connection portion connected to the regular patch portion, and a second connection portion connected to the first connection portion;
所述第二连接部分与所述同轴探针相连接；The second connecting portion is connected to the coaxial probe;
所述第一连接部分与所述第二连接部分同轴的设置；The first connecting portion and the second connecting portion are arranged coaxially;
所述规则贴片部分与所述第一连接部分远离所述第二连接部分的一端相连接。The regular patch portion is connected to an end of the first connection portion away from the second connection portion.
根据本发明的一个方面，所述第一连接部分和所述第二连接部分分别为矩形金属贴片；According to one aspect of the present invention, the first connecting portion and the second connecting portion are respectively rectangular metal patches;
所述第二连接部分的宽度大于所述第一连接部分的宽度；The width of the second connecting portion is greater than the width of the first connecting portion;
所述枝节防护结构与所述第二连接部分的长边相连接；The branch protection structure is connected to the long side of the second connecting portion;
所述规则贴片部分为轴对称金属贴片，其中，所述规则贴片部分具有相互垂直的第一对称轴和第二对称轴，且所述第一对称轴的长度大于所述第二对称轴的长度；The regular patch portion is an axisymmetric metal patch, wherein the regular patch portion has a first symmetry axis and a second symmetry axis that are perpendicular to each other, and the length of the first symmetry axis is greater than the length of the second symmetry axis;
所述第一对称轴与第一连接部分的长度方向具有夹角的设置；The first symmetry axis is arranged at an angle with the length direction of the first connecting portion;
所述规则贴片部分的中心与所述第一连接部分的对称轴相对齐的设置。The center of the regular patch portion is aligned with the symmetry axis of the first connecting portion.
根据本发明的一个方面，所述第二电磁感应结构采用与所述介质基板侧面形状相一致的金属贴片；According to one aspect of the present invention, the second electromagnetic induction structure uses a metal patch that is consistent with the side shape of the dielectric substrate;
在所述第二电磁感应结构上设置有供所述同轴探针通过的第一过孔。A first via hole for the coaxial probe to pass through is arranged on the second electromagnetic induction structure.
为实现上述发明目的，本发明提供一种枝节防护结构，包括：第二金属结构和二极管；To achieve the above-mentioned object of the invention, the present invention provides a branch protection structure, comprising: a second metal structure and a diode;
所述第二金属结构呈轴对称结构，且所述第二金属结构具有两个对称分布的支脚部分；The second metal structure is an axisymmetric structure, and the second metal structure has two symmetrically distributed supporting legs;
所述二极管与所述支脚部分一一对应的设置。The diodes are arranged in one-to-one correspondence with the leg parts.
根据本发明的一个方面，两个所述二极管的设置方向为一致的；According to one aspect of the present invention, the two diodes are arranged in the same direction;
所述二极管采用PIN二极管；The diode is a PIN diode;
所述第二金属结构还包括：用于连接所述支脚部分的支脚连接部分；The second metal structure further includes: a leg connecting portion for connecting the leg portion;
所述支脚连接部分和所述支脚部分分别为矩形金属片；The support leg connecting portion and the support leg portion are respectively rectangular metal sheets;
两个所述支脚部分分别与所述支脚连接部分长度方向的两端分别垂直连接，且两个所述支脚部分处于所述支脚连接部分长度方向的同一侧。The two support leg portions are respectively vertically connected to two ends of the support leg connecting portion in the length direction, and the two support leg portions are located on the same side of the support leg connecting portion in the length direction.
根据本发明的一种方案，本发明提出了一种具有枝节防护结构的北斗导航圆极化能量选择天线，该发明与现有的前门防护措施（如能量选择表面）相比，通过创造性设置的“龙门”型枝节防护结构，在需防护的圆极化天线微带馈线两侧将枝节防护结构与微带馈线相连，使得枝节防护结构与圆极化天线相结合，实现了小型化、一体化的能量选择天线设计。According to a scheme of the present invention, the present invention proposes a Beidou navigation circularly polarized energy selective antenna with a branch protection structure. Compared with the existing front door protection measures (such as energy selective surfaces), the invention creatively sets a "gantry" type branch protection structure, connects the branch protection structure with the microstrip feeder on both sides of the microstrip feeder of the circularly polarized antenna to be protected, so that the branch protection structure is combined with the circularly polarized antenna, thereby realizing a miniaturized and integrated energy selective antenna design.
根据本发明的一种方案，本发明在不增加圆极化能量选择天线的天线尺寸的前提下，可与各类不同拓扑的圆极化能量选择天线相结合，使得圆极化能量选择天线在正常工作时具备良好的发射性能，且当强电磁脉冲入射时天线具备良好的对强电磁脉冲的防护效果，展现了本发明良好的适用性。According to one solution of the present invention, the present invention can be combined with various circularly polarized energy selective antennas of different topologies without increasing the antenna size of the circularly polarized energy selective antenna, so that the circularly polarized energy selective antenna has good transmission performance during normal operation, and when a strong electromagnetic pulse is incident, the antenna has a good protection effect against a strong electromagnetic pulse, demonstrating the good applicability of the present invention.
根据本发明的一种方案，本发明提出了一种具有枝节防护结构的北斗导航圆极化能量选择天线，根据在强电磁脉冲照射前后，通过“龙门”型枝节防护结构的微带形式，改变了圆极化能量选择天线的馈线阻抗，进而改变了其在照射前后的阻抗匹配，使得圆极化能量选择天线在正常工作时具备良好的发射性能，而当强电磁脉冲入射时圆极化能量选择天线具备了良好的对强电磁脉冲的防护效果。According to a scheme of the present invention, the present invention proposes a Beidou navigation circularly polarized energy selective antenna with a branch protection structure. Before and after the irradiation of a strong electromagnetic pulse, the feeder impedance of the circularly polarized energy selective antenna is changed through the microstrip form of a "gantry" type branch protection structure, thereby changing its impedance matching before and after the irradiation, so that the circularly polarized energy selective antenna has good transmission performance during normal operation, and when a strong electromagnetic pulse is incident, the circularly polarized energy selective antenna has a good protection effect against the strong electromagnetic pulse.
根据本发明的一种方案，本发明是利用在圆极化能量选择天线正常工作时，枝节防护结构的二极管两端感应电压值低于二极管的导通电压值，此时二极管处于截止状态，天线可以在北斗三号的B1频段的工作。而当强电磁脉冲照射时，此时，二极管两端感应电压值大于二极管的导通电压值，二极管导通，枝节结构与微带馈线相连，使得同轴探针的阻抗与金属微带线的阻抗由匹配变成不匹配，从而使得其在北斗三号的B1频段S11增加至-1dB以上，使得天线无法接收强电磁脉冲入射的能量，进而保护了系统免受强电磁脉冲的毁伤。According to one solution of the present invention, the present invention utilizes that when the circularly polarized energy selective antenna is working normally, the induced voltage value at both ends of the diode of the branch protection structure is lower than the conduction voltage value of the diode, at this time the diode is in a cut-off state, and the antenna can work in the B1 frequency band of BeiDou-3. When a strong electromagnetic pulse is irradiated, at this time, the induced voltage value at both ends of the diode is greater than the conduction voltage value of the diode, the diode is turned on, and the branch structure is connected to the microstrip feeder, so that the impedance of the coaxial probe and the impedance of the metal microstrip line change from matching to mismatching, so that it increases to more than -1dB in the B1 frequency band S 11 of BeiDou-3, so that the antenna cannot receive the energy of the strong electromagnetic pulse, thereby protecting the system from damage by the strong electromagnetic pulse.
根据本发明的一种方案，本发明的枝节防护结构其结构简单，具有加工难度和加工成本低的优点，可方便且低成本的应用在天线防护中，不仅防护优良，且具有更为广阔的应用前景。According to one solution of the present invention, the branch protection structure of the present invention has a simple structure and has the advantages of low processing difficulty and cost. It can be conveniently and low-costly applied in antenna protection. It not only has excellent protection but also has broader application prospects.
附图说明BRIEF DESCRIPTION OF THE DRAWINGS
图1是示意性表示根据本发明的一种实施方式的圆极化能量选择天线的结构图；FIG1 is a structural diagram schematically showing a circularly polarized energy selective antenna according to an embodiment of the present invention;
图2是示意性表示根据本发明的一种实施方式的第一电磁感应结构的结构图；FIG2 is a structural diagram schematically showing a first electromagnetic induction structure according to an embodiment of the present invention;
图3是示意性表示根据本发明的另一种实施方式的第一电磁感应结构的结构图；3 is a structural diagram schematically showing a first electromagnetic induction structure according to another embodiment of the present invention;
图4是示意性表示根据本发明的一种实施方式的枝节防护结构的结构图；FIG4 is a structural diagram schematically showing a branch protection structure according to an embodiment of the present invention;
图5是示意性表示采用图2中第一电磁感应结构的圆极化能量选择天线正常工作时的S11曲线图；FIG5 is a schematic diagram showing an S11 curve of the circularly polarized energy selective antenna using the first electromagnetic induction structure in FIG2 when it is working normally;
图6是示意性表示采用图2中第一电磁感应结构的圆极化能量选择天线正常工作时的方向图；FIG6 is a schematic diagram showing a directional diagram of a circularly polarized energy selective antenna using the first electromagnetic induction structure in FIG2 when operating normally;
图7是示意性表示采用图2中第一电磁感应结构的圆极化能量选择天线正常工作时的轴比图；FIG7 is a diagram schematically showing an axial ratio of the circularly polarized energy selective antenna using the first electromagnetic induction structure in FIG2 when it is operating normally;
图8是示意性表示采用图2中第一电磁感应结构的圆极化能量选择天线防护状态时S11曲线与正常工作时S11曲线对比图；FIG8 is a schematic diagram showing a comparison between an S11 curve in a protection state of the circularly polarized energy selection antenna using the first electromagnetic induction structure in FIG2 and an S11 curve in a normal working state;
图9是示意性表示采用图2中第一电磁感应结构的圆极化能量选择天线正常工作时phi=0°与防护状态时phi=0°的方向图对比图；9 is a schematic diagram showing a comparison of the directional diagrams of the circularly polarized energy selective antenna using the first electromagnetic induction structure in FIG. 2 when phi=0° is in normal operation and when phi=0° is in protection state;
图10是示意性表示采用图2中第一电磁感应结构的圆极化能量选择天线正常工作时phi=90°与防护状态时phi=90°的方向图对比图；10 is a schematic diagram showing a comparison of the directional patterns of the circularly polarized energy selective antenna using the first electromagnetic induction structure in FIG. 2 when phi=90° is in normal operation and when phi=90° is in protection state;
图11是示意性表示采用图3中第一电磁感应结构的圆极化能量选择天线正常工作时的S11曲线图；FIG11 is a schematic diagram showing an S11 curve when the circularly polarized energy selective antenna using the first electromagnetic induction structure in FIG3 works normally;
图12是示意性表示采用图3中第一电磁感应结构的圆极化能量选择天线正常工作时的方向图；FIG12 is a schematic diagram showing a directional diagram of a circularly polarized energy selective antenna using the first electromagnetic induction structure in FIG3 when operating normally;
图13是示意性表示采用图3中第一电磁感应结构的圆极化能量选择天线正常工作时的轴比图；13 is a diagram schematically showing an axial ratio of the circularly polarized energy selective antenna using the first electromagnetic induction structure in FIG. 3 when operating normally;
图14是示意性表示采用图3中第一电磁感应结构的圆极化能量选择天线防护状态时S11曲线与正常工作时S11曲线对比图；FIG14 is a schematic diagram showing a comparison between an S11 curve in a protection state of the circularly polarized energy selection antenna using the first electromagnetic induction structure in FIG3 and an S11 curve in a normal working state;
图15是示意性表示采用图3中第一电磁感应结构的圆极化能量选择天线正常工作时phi=0°与防护状态时phi=0°的方向图对比图；15 is a schematic diagram showing a comparison of the directional diagrams of the circularly polarized energy selective antenna using the first electromagnetic induction structure in FIG. 3 when phi=0° is in normal operation and when phi=0° is in protection state;
图16是示意性表示采用图3中第一电磁感应结构的圆极化能量选择天线正常工作时phi=90°与防护状态时phi=90°的方向图对比图。FIG16 is a diagram schematically showing a comparison of the directional patterns of the circularly polarized energy selective antenna using the first electromagnetic induction structure in FIG3 when phi=90° is in normal operation and when phi=90° is in protection state.
具体实施方式Detailed ways
为了更清楚地说明本发明实施方式或现有技术中的技术方案，下面将对实施方式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发明的一些实施方式，对于本领域普通技术人员而言，在不付出创造性劳动的前提下，还可以根据这些附图获得其他的附图。In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments are briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention, and for ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.
在针对本发明的实施方式进行描述时，术语“纵向”、“横向”、“上”、“下”、“前”、“后”、“左”、“右”、“竖直”、“水平”、“顶”、“底”、“内”、“外”所表达的方位或位置关系是基于相关附图所示的方位或位置关系，其仅是为了便于描述本发明和简化描述，而不是指示或暗示所指的装置或元件必须具有特定的方位、以特定的方位构造和操作，因此上述术语不能理解为对本发明的限制。When describing the embodiments of the present invention, the orientation or positional relationship expressed by the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" are based on the orientation or positional relationship shown in the relevant drawings and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the referred device or element must have a specific orientation, be constructed and operate in a specific orientation. Therefore, the above terms should not be understood as limiting the present invention.
下面结合附图和具体实施方式对本发明作详细地描述，实施方式不能在此一一赘述，但本发明的实施方式并不因此限定于以下实施方式。The present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments. The embodiments cannot be described one by one here, but the embodiments of the present invention are not therefore limited to the following embodiments.
结合图1、图2和图4所示，根据本发明的一种实施方式，本发明的一种用于北斗导航的圆极化能量选择天线，包括：介质基板1，在介质基板1相对两侧分别设置的第一电磁感应结构2和第二电磁感应结构3，嵌入在介质基板1的同轴探针4。在本实施方式中，同轴探针4与第一电磁感应结构2相连接。As shown in FIG. 1 , FIG. 2 and FIG. 4 , according to an embodiment of the present invention, a circularly polarized energy selective antenna for Beidou navigation of the present invention comprises: a dielectric substrate 1, a first electromagnetic induction structure 2 and a second electromagnetic induction structure 3 respectively arranged on opposite sides of the dielectric substrate 1, and a coaxial probe 4 embedded in the dielectric substrate 1. In this embodiment, the coaxial probe 4 is connected to the first electromagnetic induction structure 2.
在本实施方式中，第一电磁感应结构2包括：第一金属结构21和与第一金属结构21相连接的枝节防护结构22；其中，枝节防护结构22整体呈龙门结构，其包括：第二金属结构221和二极管222；其中，第二金属结构221呈轴对称结构，且第二金属结构221具有两个对称分布的支脚部分221a；在本实施方式中，二极管222与支脚部分221a一一对应的设置，且二极管222用于与第一金属结构21相连接。In this embodiment, the first electromagnetic induction structure 2 includes: a first metal structure 21 and a branch protection structure 22 connected to the first metal structure 21; wherein the branch protection structure 22 is a gantry structure as a whole, and includes: a second metal structure 221 and a diode 222; wherein the second metal structure 221 is an axisymmetric structure, and the second metal structure 221 has two symmetrically distributed leg portions 221a; in this embodiment, the diode 222 is arranged in a one-to-one correspondence with the leg portion 221a, and the diode 222 is used to connect to the first metal structure 21.
结合图1、图2和图4所示，根据本发明的一种实施方式，枝节防护结构22中，两个二极管222的设置方向为一致的。As shown in combination with FIG. 1 , FIG. 2 and FIG. 4 , according to an embodiment of the present invention, in the branch protection structure 22 , the two diodes 222 are arranged in the same direction.
根据本发明的一种实施方式，二极管222采用PIN二极管。According to an embodiment of the present invention, the diode 222 is a PIN diode.
结合图1、图2和图4所示，根据本发明的一种实施方式，在第一金属结构21与第二金属结构221之间，二极管222的正极与第二金属结构221相连接，其负极与第一金属结构21相连接。As shown in FIG. 1 , FIG. 2 and FIG. 4 , according to an embodiment of the present invention, between the first metal structure 21 and the second metal structure 221 , the anode of the diode 222 is connected to the second metal structure 221 , and the cathode thereof is connected to the first metal structure 21 .
结合图1和图2所示，根据本发明的一种实施方式，在第一电磁感应结构2中，枝节防护结构22可设置为一个。当然，在第一电磁感应结构2中，枝节防护结构22还可对称的设置有多个，例如，枝节防护结构22在第一电磁感应结构2中对称的设置有两个。通过设置多个枝节防护结构22的方式可以使得天线在防护状态时使得同轴于第二连接部分213的阻抗变得更加不匹配，从而使得天线的S11在防护状态时进一步降低，进而获得了更佳的防护效果。As shown in combination with FIG. 1 and FIG. 2 , according to an embodiment of the present invention, in the first electromagnetic induction structure 2, a branch protection structure 22 may be provided as one. Of course, in the first electromagnetic induction structure 2, a plurality of branch protection structures 22 may be symmetrically provided, for example, two branch protection structures 22 may be symmetrically provided in the first electromagnetic induction structure 2. By providing a plurality of branch protection structures 22, the impedance coaxial to the second connection portion 213 may become more mismatched when the antenna is in the protection state, thereby further reducing the S 11 of the antenna in the protection state, thereby obtaining a better protection effect.
结合图1、图2和图4所示，根据本发明的一种实施方式，第二金属结构221还包括：用于连接支脚部分221a的支脚连接部分221b；其中，支脚连接部分221b和支脚部分221a分别为矩形金属片。在本实施方式中，两个支脚部分221a分别与支脚连接部分221b长度方向的两端分别垂直连接，且两个支脚部分221a处于支脚连接部分221b长度方向的同一侧。As shown in FIG. 1 , FIG. 2 and FIG. 4 , according to an embodiment of the present invention, the second metal structure 221 further includes: a foot connection portion 221b for connecting the foot portion 221a; wherein the foot connection portion 221b and the foot portion 221a are rectangular metal sheets. In this embodiment, the two foot portions 221a are respectively vertically connected to the two ends of the foot connection portion 221b in the length direction, and the two foot portions 221a are on the same side of the foot connection portion 221b in the length direction.
在本实施方式中，支脚连接部分221b和支脚部分221a是一体设置的。通过其一体设置的方式使得支脚连接部分221b和支脚部分221a避免了连接间隙或连接重叠，从而可有效的消除在连接位置对感应电流等的影响，有效的保证了整个枝节防护结构22的防护性能。In this embodiment, the leg connection portion 221b and the leg portion 221a are integrally arranged. The integral arrangement avoids connection gaps or connection overlaps between the leg connection portion 221b and the leg portion 221a, thereby effectively eliminating the influence of the connection position on the induced current, etc., and effectively ensuring the protection performance of the entire branch protection structure 22.
如图2所示，根据本发明的一种实施方式，第一金属结构21包括：规则贴片部分211，与规则贴片部分211相连接的第一连接部分212，与第一连接部分212相连接的第二连接部分213；其中，第二连接部分213与同轴探针4相连接。在本实施方式中，第一连接部分212与第二连接部分213同轴的设置；规则贴片部分211与第一连接部分212远离第二连接部分213的一端相连接。As shown in FIG2 , according to an embodiment of the present invention, the first metal structure 21 includes: a regular patch portion 211, a first connection portion 212 connected to the regular patch portion 211, and a second connection portion 213 connected to the first connection portion 212; wherein the second connection portion 213 is connected to the coaxial probe 4. In this embodiment, the first connection portion 212 and the second connection portion 213 are coaxially arranged; the regular patch portion 211 is connected to an end of the first connection portion 212 away from the second connection portion 213.
如图2所示，根据本发明的一种实施方式，第一连接部分212和第二连接部分213分别为矩形金属贴片；其中，第二连接部分213的宽度大于第一连接部分212。在本实施方式中，枝节防护结构22与第二连接部分213的长边相连接。其中，枝节防护结构22可在第二连接部分213一侧的长边设置，或者，枝节防护结构22在第二连接部分213两个长边上分别设置，且两个枝节防护结构22关于第二连接部分213的对称轴对称分布。As shown in FIG2 , according to an embodiment of the present invention, the first connection portion 212 and the second connection portion 213 are respectively rectangular metal patches; wherein the width of the second connection portion 213 is greater than that of the first connection portion 212. In this embodiment, the branch protection structure 22 is connected to the long side of the second connection portion 213. The branch protection structure 22 can be arranged on the long side of one side of the second connection portion 213, or the branch protection structure 22 is arranged on the two long sides of the second connection portion 213, and the two branch protection structures 22 are symmetrically distributed about the symmetry axis of the second connection portion 213.
在本实施方式中，规则贴片部分211为轴对称金属贴片，其中，规则贴片部分211具有相互垂直的第一对称轴和第二对称轴，且第一对称轴的长度大于第二对称轴的长度；其中，第一对称轴与第一连接部分212的长度方向具有夹角的设置。在本实施方式中，第一对称轴与第一连接部分212的长度方向的夹角可设置为锐角。In this embodiment, the regular patch portion 211 is an axisymmetric metal patch, wherein the regular patch portion 211 has a first symmetry axis and a second symmetry axis that are perpendicular to each other, and the length of the first symmetry axis is greater than the length of the second symmetry axis; wherein the first symmetry axis is set at an angle with the length direction of the first connecting portion 212. In this embodiment, the angle between the first symmetry axis and the length direction of the first connecting portion 212 can be set to an acute angle.
在本实施方式中，规则贴片部分211的中心与第一连接部分212的对称轴相对齐的设置，其中，规则贴片部分211的中心为第一对称轴和第二对称轴的交点，该交点位于第一连接部分212的对称轴的延长线上。In this embodiment, the center of the regular patch part 211 is aligned with the symmetry axis of the first connecting part 212, wherein the center of the regular patch part 211 is the intersection of the first symmetry axis and the second symmetry axis, and the intersection is located on the extension line of the symmetry axis of the first connecting part 212.
通过上述设置，使得天线在正常工作时具备良好的阻抗匹配，确保了天线在正常工作时具备良好的信号收发性能。Through the above settings, the antenna has good impedance matching when it is working normally, ensuring that the antenna has good signal receiving and sending performance when it is working normally.
根据本发明的一种实施方式，第一金属结构21的厚度与第二金属结构221的厚度为一致的。According to an embodiment of the present invention, the thickness of the first metal structure 21 is consistent with the thickness of the second metal structure 221 .
通过上述设置，可方便第一金属结构21与第二金属结构221加工在同一块介质基板上，且可实现加工的同步，而无需对第二金属结构221的厚度进行特殊处理，例如加厚或者打薄。Through the above arrangement, the first metal structure 21 and the second metal structure 221 can be conveniently processed on the same dielectric substrate, and synchronous processing can be achieved without special processing of the thickness of the second metal structure 221, such as thickening or thinning.
根据本发明的一种实施方式，第二金属结构221的长度小于或等于第二连接部分213的长度，即第二金属结构221中支脚连接部分221b的长度小于或等于第二连接部分213的长度。According to one embodiment of the present invention, the length of the second metal structure 221 is less than or equal to the length of the second connecting portion 213 , that is, the length of the support connecting portion 221 b in the second metal structure 221 is less than or equal to the length of the second connecting portion 213 .
通过上述设置，有效确保了天线在正常工作时不会受到枝节防护结构22的串扰的影响，保证了天线正常工作时的性能。Through the above arrangement, it is effectively ensured that the antenna will not be affected by the crosstalk of the branch protection structure 22 when it is working normally, thereby ensuring the performance of the antenna when it is working normally.
如图1所示，根据本发明的一种实施方式，第二电磁感应结构3采用与介质基板1侧面形状相一致的金属贴片；其中，在第二电磁感应结构3上设置有供同轴探针4通过的第一过孔。As shown in FIG. 1 , according to an embodiment of the present invention, the second electromagnetic induction structure 3 uses a metal patch having a shape consistent with the side of the dielectric substrate 1 ; wherein a first via hole for the coaxial probe 4 to pass through is provided on the second electromagnetic induction structure 3 .
如图4所示，根据本发明的一种实施方式，本发明的一种枝节防护结构，包括：第二金属结构221和二极管222；在本实施方式中，第二金属结构221呈轴对称结构，且第二金属结构221具有两个对称分布的支脚部分221a；其中，二极管222与支脚部分221a一一对应的设置。As shown in Figure 4, according to an embodiment of the present invention, a branch protection structure of the present invention includes: a second metal structure 221 and a diode 222; in this embodiment, the second metal structure 221 is an axisymmetric structure, and the second metal structure 221 has two symmetrically distributed support legs 221a; wherein the diode 222 is arranged in a one-to-one correspondence with the support legs 221a.
如图4所示，根据本发明的一种实施方式，两个二极管222的设置方向为一致的，其中，两个二极管222的正极分别与支脚部分221a相连接。As shown in FIG. 4 , according to an embodiment of the present invention, the two diodes 222 are arranged in the same direction, wherein the anodes of the two diodes 222 are respectively connected to the leg portions 221 a .
如图4所示，根据本发明的一种实施方式，二极管222采用PIN二极管。通过上述设置，有效的降低了本发明的生产成本，使得本发明具有更广泛的使用前景。As shown in Fig. 4, according to an embodiment of the present invention, a PIN diode is used as the diode 222. Through the above configuration, the production cost of the present invention is effectively reduced, so that the present invention has a wider application prospect.
如图4所示，根据本发明的一种实施方式，第二金属结构221还包括：用于连接支脚部分221a的支脚连接部分221b；其中，支脚连接部分221b和支脚部分221a分别为矩形金属片；在本实施方式中，两个支脚部分221a分别与支脚连接部分221b长度方向的两端分别垂直连接，且两个支脚部分221a处于支脚连接部分221b长度方向的同一侧。As shown in Figure 4, according to one embodiment of the present invention, the second metal structure 221 also includes: a support leg connecting portion 221b for connecting the support leg portion 221a; wherein the support leg connecting portion 221b and the support leg portion 221a are respectively rectangular metal sheets; in this embodiment, the two support leg portions 221a are respectively vertically connected to the two ends of the support leg connecting portion 221b in the length direction, and the two support leg portions 221a are on the same side of the length direction of the support leg connecting portion 221b.
为进一步说明本方案，对其作进一步举例阐述。To further illustrate this solution, further examples are given.
实施例1Example 1
选择需要防护的北斗导航圆极化能量选择天线实现，具体的，选取了切角方形圆极化能量选择天线进行防护，参见图2所示。在本实施方式中，第一金属结构21包括：规则贴片部分211，与规则贴片部分211相连接的第一连接部分212，与第一连接部分212相连接的第二连接部分213；其中，规则贴片部分211采用切角正方形金属贴片，其结构满足轴对称形式，且相互垂直的第一对称轴和第二对称轴中，第一对称轴的长度大于第二对称轴的长度。在本实施方式中，规则贴片部分211采用边长为54.4mm的正方形贴片切角制成，其切去的角为腰长3.9mm的等腰直角三角形，且切角位置处于左上和右下。由此，在第一连接部分212与规则贴片部分211的侧边相互固定连接的情况下，规则贴片部分211的第一对称轴与第一连接部分212的长度方向的夹角为45°。The Beidou navigation circular polarization energy selection antenna that needs to be protected is selected to achieve it. Specifically, a cut-corner square circular polarization energy selection antenna is selected for protection, as shown in Figure 2. In this embodiment, the first metal structure 21 includes: a regular patch part 211, a first connecting part 212 connected to the regular patch part 211, and a second connecting part 213 connected to the first connecting part 212; wherein the regular patch part 211 adopts a cut-corner square metal patch, and its structure satisfies the axial symmetry form, and in the mutually perpendicular first symmetry axis and second symmetry axis, the length of the first symmetry axis is greater than the length of the second symmetry axis. In this embodiment, the regular patch part 211 is made of a square patch with a side length of 54.4 mm, and the cut corner is an isosceles right triangle with a waist length of 3.9 mm, and the cut corner position is at the upper left and lower right. Therefore, when the first connecting part 212 and the side of the regular patch part 211 are fixedly connected to each other, the angle between the first symmetry axis of the regular patch part 211 and the length direction of the first connecting part 212 is 45°.
进一步的，第一连接部分212采用矩形金属贴片，其宽度为1.2mm，长度为30.9mm；Furthermore, the first connection portion 212 is a rectangular metal patch with a width of 1.2 mm and a length of 30.9 mm;
进一步的，第二连接部分213采用矩形金属贴片，其宽度大于第一连接部分212的宽度，具体的，第二连接部分213的宽度为4.9mm，长度为56.1mm。在本实施方式中，第二连接部分213和第一连接部分212同轴的设置。Furthermore, the second connection part 213 is a rectangular metal patch, and its width is greater than that of the first connection part 212. Specifically, the width of the second connection part 213 is 4.9 mm, and the length is 56.1 mm. In this embodiment, the second connection part 213 and the first connection part 212 are coaxially arranged.
进一步的，同轴探针4选用D550D34F05-430探针，且同轴探针4的内针中心与第二电磁感应结构3的第一过孔的边缘之间的距离为5.3mm。Furthermore, the coaxial probe 4 uses a D550D34F05-430 probe, and the distance between the inner needle center of the coaxial probe 4 and the edge of the first via hole of the second electromagnetic induction structure 3 is 5.3 mm.
进一步的，介质基板1为F4BTMS300基板，厚度为2mm，介电常数为3，损耗正切为0.0013。Furthermore, the dielectric substrate 1 is a F4BTMS300 substrate with a thickness of 2 mm, a dielectric constant of 3, and a loss tangent of 0.0013.
在本实施方式中，枝节防护结构22的结构尺寸基于前述的第一电磁感应结构2的结构和尺寸相对应的设置；其中，枝节防护结构22在第一金属结构21的第二连接部分213的两个长边分别设置，且在第二连接部分213的相对两侧对称的分布。在本实施方式中，枝节防护结构22包括：第二金属结构221和二极管222；其中，第二金属结构221包括：两个间隔设置的支脚部分221a和支脚连接部分221b；两个支脚部分221a分别与支脚连接部分221b长度方向的两端分别垂直连接，且两个支脚部分221a处于支脚连接部分221b长度方向的同一侧。In this embodiment, the structural dimensions of the branch protection structure 22 are set corresponding to the structure and dimensions of the aforementioned first electromagnetic induction structure 2; wherein the branch protection structure 22 is respectively set on the two long sides of the second connection part 213 of the first metal structure 21, and is symmetrically distributed on the opposite sides of the second connection part 213. In this embodiment, the branch protection structure 22 includes: a second metal structure 221 and a diode 222; wherein the second metal structure 221 includes: two spaced leg parts 221a and a leg connection part 221b; the two leg parts 221a are respectively vertically connected to the two ends of the leg connection part 221b in the length direction, and the two leg parts 221a are on the same side of the leg connection part 221b in the length direction.
进一步的，支脚连接部分221b为矩形金属贴片，其长度为22.5mm，宽度为10mm；支脚部分221a为矩形金属贴片，长度为14.8mm，宽度6.5mm。在本实施方式中，支脚连接部分221b与第二连接部分213相平行且同轴的设置，即支脚连接部分221b的端部与第二连接部分213的端部之间的距离为16.8mm。Furthermore, the leg connection portion 221b is a rectangular metal patch with a length of 22.5 mm and a width of 10 mm; the leg portion 221a is a rectangular metal patch with a length of 14.8 mm and a width of 6.5 mm. In this embodiment, the leg connection portion 221b is parallel to and coaxial with the second connection portion 213, that is, the distance between the end of the leg connection portion 221b and the end of the second connection portion 213 is 16.8 mm.
进一步的，二极管222采用BAP51-02二极管。Furthermore, the diode 222 is a BAP51-02 diode.
在如图2所示的切角方形圆极化能量选择天线中，当天线正常工作时，枝节防护结构22的二极管222处于截止状态，天线可以在1.557GHz至1.586GHz正常工作，如图5所示。其在1.575GHz的最大增益达到7.1dBi，3dB波束宽度分别为84.5°与82.4°，如图6所示。其在1.575GHz时，最大增益处的轴比为0.45dB，如图7所示。其可在北斗三号的B1频段的工作。而当强电磁脉冲照射时，此时，天线在1.557GHz至1.586GHz的S11增加至-1dB以上，且在1.575GHz处的最大增益降低至-8.8dBi，如图8、图9与图10所示。In the cut-corner square circularly polarized energy selective antenna shown in FIG2 , when the antenna is operating normally, the diode 222 of the branch protection structure 22 is in the cut-off state, and the antenna can operate normally from 1.557 GHz to 1.586 GHz, as shown in FIG5 . Its maximum gain at 1.575 GHz reaches 7.1 dBi, and the 3dB beam widths are 84.5° and 82.4°, respectively, as shown in FIG6 . At 1.575 GHz, the axial ratio at the maximum gain is 0.45 dB, as shown in FIG7 . It can operate in the B1 frequency band of BeiDou-3. When a strong electromagnetic pulse is irradiated, at this time, the S 11 of the antenna at 1.557 GHz to 1.586 GHz increases to above -1 dB, and the maximum gain at 1.575 GHz decreases to -8.8 dBi, as shown in FIG8 , FIG9 and FIG10 .
实施例2Example 2
选择需要防护的北斗导航圆极化能量选择天线实现，具体的，选取了椭圆圆极化能量选择天线进行防护，参见图3所示。在本实施方式中，第一金属结构21包括：规则贴片部分211，与规则贴片部分211相连接的第一连接部分212，与第一连接部分212相连接的第二连接部分213；其中，规则贴片部分211采用椭圆形金属贴片，其结构满足轴对称形式，且相互垂直的第一对称轴和第二对称轴中，第一对称轴的长度大于第二对称轴的长度。在本实施方式中，规则贴片部分211的长轴（即第一对称轴）为64.5mm，短轴（即第二对称轴）为63.7mm。在本实施方式中，在第一连接部分212与规则贴片部分211的侧边相互固定连接的情况下，规则贴片部分211的第一对称轴与第一连接部分212的长度方向的夹角为45°。The Beidou navigation circular polarization energy selection antenna that needs to be protected is selected to achieve it. Specifically, an elliptical circular polarization energy selection antenna is selected for protection, as shown in FIG3. In this embodiment, the first metal structure 21 includes: a regular patch part 211, a first connecting part 212 connected to the regular patch part 211, and a second connecting part 213 connected to the first connecting part 212; wherein the regular patch part 211 adopts an elliptical metal patch, and its structure satisfies the axial symmetry form, and the length of the first symmetry axis and the second symmetry axis that are perpendicular to each other is greater than the length of the second symmetry axis. In this embodiment, the long axis (i.e., the first symmetry axis) of the regular patch part 211 is 64.5 mm, and the short axis (i.e., the second symmetry axis) is 63.7 mm. In this embodiment, when the first connecting part 212 and the side of the regular patch part 211 are fixedly connected to each other, the angle between the first symmetry axis of the regular patch part 211 and the length direction of the first connecting part 212 is 45°.
进一步的，第一连接部分212采用矩形金属贴片，其宽度为1.1mm，长度为30.6mm；Furthermore, the first connection portion 212 is a rectangular metal patch with a width of 1.1 mm and a length of 30.6 mm;
进一步的，第二连接部分213采用矩形金属贴片，其宽度大于第一连接部分212的宽度，具体的，第二连接部分213的宽度为4.9mm，长度为38.2mm。在本实施方式中，第二连接部分213和第一连接部分212同轴的设置。Furthermore, the second connection part 213 is a rectangular metal patch, and its width is greater than that of the first connection part 212. Specifically, the width of the second connection part 213 is 4.9 mm, and the length is 38.2 mm. In this embodiment, the second connection part 213 and the first connection part 212 are coaxially arranged.
进一步的，同轴探针4选用D550D34F05-430探针，且同轴探针4的内针中心与第二电磁感应结构3的第一过孔的边缘之间的距离为5.3mm。Furthermore, the coaxial probe 4 uses a D550D34F05-430 probe, and the distance between the inner needle center of the coaxial probe 4 and the edge of the first via hole of the second electromagnetic induction structure 3 is 5.3 mm.
进一步的，介质基板1为F4BTMS300基板，厚度为2mm，介电常数为3，损耗正切为0.0013。Furthermore, the dielectric substrate 1 is a F4BTMS300 substrate with a thickness of 2 mm, a dielectric constant of 3, and a loss tangent of 0.0013.
在本实施方式中，枝节防护结构22的结构尺寸基于前述的第一电磁感应结构2的结构和尺寸相对应的设置；其中，枝节防护结构22在第一金属结构21的第二连接部分213的两个长边分别设置，且在第二连接部分213的相对两侧对称的分布。在本实施方式中，枝节防护结构22包括：第二金属结构221和二极管222；其中，第二金属结构221包括：两个间隔设置的支脚部分221a和支脚连接部分221b；两个支脚部分221a分别与支脚连接部分221b长度方向的两端分别垂直连接，且两个支脚部分221a处于支脚连接部分221b长度方向的同一侧。In this embodiment, the structural dimensions of the branch protection structure 22 are set corresponding to the structure and dimensions of the aforementioned first electromagnetic induction structure 2; wherein the branch protection structure 22 is respectively set on the two long sides of the second connection part 213 of the first metal structure 21, and is symmetrically distributed on the opposite sides of the second connection part 213. In this embodiment, the branch protection structure 22 includes: a second metal structure 221 and a diode 222; wherein the second metal structure 221 includes: two spaced leg parts 221a and a leg connection part 221b; the two leg parts 221a are respectively vertically connected to the two ends of the leg connection part 221b in the length direction, and the two leg parts 221a are on the same side of the leg connection part 221b in the length direction.
进一步的，支脚连接部分221b为矩形金属贴片，其长度为23.5mm，宽度为9.5mm；支脚部分221a为矩形金属贴片，长度为15mm，宽度6mm。在本实施方式中，支脚连接部分221b与第二连接部分213相平行且同轴的设置，即支脚连接部分221b的端部与第二连接部分213的端部之间的距离为4mm。Furthermore, the leg connection portion 221b is a rectangular metal patch with a length of 23.5 mm and a width of 9.5 mm; the leg portion 221a is a rectangular metal patch with a length of 15 mm and a width of 6 mm. In this embodiment, the leg connection portion 221b is parallel to and coaxial with the second connection portion 213, that is, the distance between the end of the leg connection portion 221b and the end of the second connection portion 213 is 4 mm.
进一步的，二极管222采用BAP51-02二极管。Furthermore, the diode 222 is a BAP51-02 diode.
在如图3所示的椭圆圆极化天线中，当天线正常工作时，枝节防护结构22的二极管222处于截止状态，天线可以在1.56GHz至1.59GHz正常工作，如图11所示。其在1.575GHz的最大增益达到7.6dBi，3dB波束宽度分别为76.5°与80.1°，如图12所示。其在1.575GHz时，最大增益处的轴比为2.5dB，如图13所示。其可在北斗三号的B1频段的工作。而当强电磁脉冲照射时，此时，天线在1.56GHz至1.59GHz的S11增加至-1dB以上，且在1.575GHz处的最大增益降低至-6.9dBi，如图14、图15与图16所示。In the elliptical circular polarization antenna shown in FIG3 , when the antenna is operating normally, the diode 222 of the branch protection structure 22 is in a cut-off state, and the antenna can operate normally from 1.56 GHz to 1.59 GHz, as shown in FIG11 . Its maximum gain at 1.575 GHz reaches 7.6 dBi, and the 3dB beam widths are 76.5° and 80.1°, respectively, as shown in FIG12 . At 1.575 GHz, the axial ratio at the maximum gain is 2.5 dB, as shown in FIG13 . It can operate in the B1 frequency band of BeiDou-3. When a strong electromagnetic pulse is irradiated, at this time, the S 11 of the antenna at 1.56 GHz to 1.59 GHz increases to above -1 dB, and the maximum gain at 1.575 GHz decreases to -6.9 dBi, as shown in FIG14 , FIG15 and FIG16 .
通过上述设置，选取了两类不同拓扑形状的圆极化能量选择天线进行设计，证明了本发明的 “龙门”型枝节防护结构的微带形式，对不同拓扑结构的圆极化能量选择天线均具备良好的防护效果，具备良好的泛用性。相较于现有技术而言，本发明将枝节防护结构与圆极化天线相结合，使得本发明可针对不同拓扑的微带馈线的圆极化能量选择天线进行防护的同时，实现了小型化、一体化的能量选择天线的设计，使其可在不增加天线尺寸的情况下，具备了对强电磁脉冲良好的防护效果。Through the above settings, two types of circularly polarized energy selective antennas with different topological shapes were selected for design, proving that the microstrip form of the "gantry" type branch protection structure of the present invention has good protection effects on circularly polarized energy selective antennas with different topological structures and has good versatility. Compared with the prior art, the present invention combines the branch protection structure with the circularly polarized antenna, so that the present invention can protect circularly polarized energy selective antennas of microstrip feeders with different topologies while realizing the design of a miniaturized and integrated energy selective antenna, so that it can have a good protection effect against strong electromagnetic pulses without increasing the size of the antenna.
上述内容仅为本发明的具体方案的例子，对于其中未详尽描述的设备和结构，应当理解为采取本领域已有的通用设备及通用方法来予以实施。The above contents are merely examples of specific solutions of the present invention. For devices and structures not described in detail therein, it should be understood that they can be implemented by adopting general devices and general methods available in the art.
以上所述仅为本发明的一个方案而已，并不用于限制本发明，对于本领域的技术人员来说，本发明可以有各种更改和变化。凡在本发明的精神和原则之内，所作的任何修改、等同替换、改进等，均应包含在本发明的保护范围之内。The above is only one solution of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.
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