Protection device for protecting frequency selective surface and antenna

Abstract

The utility model relates to a protection device for protecting a frequency selective surface and an antenna, and the protection device for protecting the frequency selective surface comprises two longitudinal frames; and the transverse frequency selection surface supporting piece is arranged between the two longitudinal frames, and fixing holes are formed in the two sides of the transverse frequency selection surface supporting piece correspondingly so that the frequency selection surfaces connected with the transverse frequency selection surface supporting piece can be fixed correspondingly. According to the protection device, the frequency selection surface is fixed by the aid of the frame structure formed by the longitudinal frames, so that the frequency selection surface can be well supported, the stability of the frame structure is realized, and the protection device is easy to expand.

Description

Technical Field

[0001] The utility model relates to the field of communications, and more particularly to a protection device for protecting a frequency selective surface, and an antenna with the protection device. Background Art

[0002] In recent years, with the development of information and communication technologies such as mobile internet and the Internet of Things, data traffic has experienced a continuous and explosive growth. With the advancement of mobile communication technology, 5G systems have become increasingly popular, and the proportion of 5G base stations deployed is also increasing. However, the high-rise platform poles for base stations are already occupied by traditional 3G and 4G systems, forcing 5G equipment to be deployed at lower locations. Deploying new platforms at lower locations can lead to coverage reduction. Sites on building rooftops are particularly difficult to add due to space constraints and aesthetic requirements. Easier installation of 5G equipment to improve 5G coverage and performance have become a pressing need for operators.

[0003] Active-passive (A+P) integrated base station antennas, combining 5G and 3G / 4G—integrating both active and passive antennas—offer unique advantages that address the aforementioned problem of limited site resources. Installation eliminates the need for additional poles, reducing the need for additional platforms. The same mounting height for 4G and 5G ensures the same coverage. Furthermore, high-position installation effectively eliminates obstructions from trees and buildings, achieving optimal coverage for both 4G and 5G networks. This also reduces tower rental costs and lowers overall costs. Furthermore, replacing the original 4G with the A+P antenna maintains no impact on 4G network coverage and performance, while significantly improving 5G coverage and performance.

[0004] Such architectures typically require the use of frequency selective surfaces (FSSs), and their support can impact overall performance, particularly when two or more FSS layers are required. CN216214061U proposes a protective device for a single-layer FSS, but the prior art lacks an effective assembly solution for dual-layer or even multi-layer FSSs. Utility Model Content

[0005] In order to solve the technical problems existing in the prior art, the frequency selective surface is made of materials such as resin and plastic and has a relatively thin overall thickness, so it usually does not have high rigidity, and therefore the overall brittleness is relatively high, especially when the antenna vibrates, the frequency selective surface is very easy to break and damage. In addition, some active and passive antennas also have the need to set up multiple layers of frequency selective surfaces. In order to achieve the above technical effects, the first aspect of the present invention proposes a protective device for protecting the frequency selective surface, the protective device comprising: two longitudinal frames; and a transverse frequency selective surface support member, the transverse frequency selective surface support member is arranged between the two longitudinal frames, wherein fixing holes are respectively provided on both sides of the transverse frequency selective surface support member to respectively fix the frequency selective surface connected thereto. According to the protective device of the present invention, the frequency selective surface is fixed by means of the frame structure formed by the longitudinal frame, which can not only maintain good support for the frequency selective surface, but also achieve the stability of the frame structure and is easy to expand.

[0006] In the technical solution according to the present invention, the protective device further includes a stacked frequency selective surface support member, which is disposed on one side of the lateral frequency selective surface support member to connect to another frequency selective surface. In this manner, the protective device according to the present invention can support multiple layers of frequency selective surfaces, thereby optimizing the radio frequency performance of the antenna including the protective device according to the present invention.

[0007] In the technical solution according to the present invention, the lateral frequency selective surface support also includes a radiating element fixing portion configured to connect and fix the radiating element connected thereto. In this manner, the protective device according to the present invention can support not only the frequency selective surface but also the corresponding radiating element, thereby further optimizing the RF performance of the antenna including the protective device according to the present invention.

[0008] In the technical solution according to the utility model, the lateral frequency selective surface support member forms a support platform around the fixing hole, which is configured to support the frequency selective surface connected thereto. In this manner, the frequency selective surface is well supported while maintaining its performance.

[0009] In the technical solution according to the present invention, a phase shifter is provided in the longitudinal frame. In this way, the longitudinal frame not only supports the frequency selective surface but also functions as part of the phase shifter, thereby making the structure of the antenna including the protective device according to the present invention more compact and optimizing the performance of the antenna including the protective device according to the present invention.

[0010] In the technical solution according to the present invention, the transverse frequency selective surface support member is provided with connectors at both ends for fixed connection to the longitudinal frame. In this manner, the transverse frequency selective surface support member and the corresponding longitudinal frame can be supported and fixed by means of the connectors, thereby enhancing the structural strength of the protective device according to the present invention.

[0011] In the technical solution according to the utility model, a phase cable fixing groove and / or a main feeder fixing groove are provided around the connecting member. In this way, the protective device according to the utility model can not only support the frequency selective surface, but also accommodate the phase cable and / or main feeder required by the antenna.

[0012] In the technical solution according to the utility model, adjustment member fixing pins and / or adjustment member fixing buckles are provided extending outwardly from both ends of the lateral frequency selective surface support member. In this way, the adjustment member fixing pins and / or adjustment member fixing buckles can be used to support and fix the longitudinal frame, thereby enhancing the structural strength of the protective device according to the utility model.

[0013] In the technical solution according to the present invention, the protection device includes at least two layers of frequency selective surfaces. In this way, the protection device according to the present invention can protect the at least two layers of frequency selective surfaces.

[0014] In the technical solution according to the present invention, the protective device further comprises at least one transverse frame, so that the longitudinal frame can be supported and fixed by means of the transverse frame, thereby enhancing the structural strength of the protective device according to the present invention.

[0015] In addition, the second aspect of the present invention further discloses an antenna, which includes the protection device according to the first aspect of the present invention.

[0016] To sum up, in the technical solution according to the present invention, the protective device according to the present invention fixes the frequency selective surface with the help of the frame structure formed by the longitudinal frame, which can not only maintain good support for the frequency selective surface, but also achieve the stability of the frame structure and is easy to expand. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The features, advantages and other aspects of the various embodiments of the present invention will become more apparent with reference to the following detailed description in conjunction with the accompanying drawings. Several embodiments of the present invention are shown herein in an illustrative and non-limiting manner. In the accompanying drawings:

[0018] Figure 1 A connection diagram of an existing active and passive integrated base station antenna 100 is shown;

[0019] Figure 2 FIG2 shows a schematic diagram of a protection device 200 according to an embodiment of the present invention;

[0020] Figure 3 A schematic diagram showing a protection device 200 according to an embodiment of the present invention; and

[0021] and Figure 4 FIG. 1 is a schematic diagram of a protection device 300 according to an embodiment of the present invention. DETAILED DESCRIPTION

[0022] The following describes in detail various exemplary embodiments of the present invention with reference to the accompanying drawings. Although the exemplary methods and devices described below include software and / or firmware executed on hardware among other components, it should be noted that these examples are merely illustrative and should not be regarded as restrictive. For example, it is contemplated that any or all hardware, software, and firmware components may be implemented exclusively in hardware, exclusively in software, or in any combination of hardware and software. Therefore, although exemplary methods and devices have been described below, it should be readily understood by those skilled in the art that the examples provided are not intended to limit the manner in which these methods and devices are implemented.

[0023] In addition, the flowcharts and block diagrams in the accompanying drawings illustrate possible architectures, functions, and operations of the methods and systems according to various embodiments of the present invention. It should be noted that the functions marked in the boxes may also occur in an order different from that marked in the accompanying drawings. For example, two boxes represented in succession may actually be executed substantially in parallel, or they may sometimes be executed in the opposite order, depending on the functions involved. It should also be noted that each box in the flowchart and / or block diagram, and the combination of boxes in the flowchart and / or block diagram, may be implemented using a dedicated hardware-based system that performs the specified functions or operations, or may be implemented using a combination of dedicated hardware and computer instructions.

[0024] As mentioned above, the prior art has the following technical problems, namely, the traditional problems in the background technology. The main problems that the present invention needs to solve are as follows, namely, the frequency selective surface has the technical problem of insufficient rigidity during application. When the antenna vibrates, the frequency selective surface is very likely to break and be damaged.

[0025] To address this technical problem, the inventors of the present utility model innovatively came up with the idea of ​​providing a protective device for the frequency selection device. In the protective device, a frame structure formed by a longitudinal frame supports the frequency selection surface, so that the frequency selection surface will not easily malfunction even in a vibrating state.

[0026] The following will first introduce the application scenarios of the protection device proposed according to the present invention. Figure 1 FIG. 1 shows a connection diagram of an existing active and passive integrated base station antenna 100. Figure 1 This is a conventional A (active antenna) + P (passive antenna) layout. The A antenna 110 and the P antenna 120 are connected together via a load-bearing frame. The P antenna 120 is secured to one side of the load-bearing frame and enclosed within its housing. The A antenna 110 is secured to the other side of the load-bearing frame via a mounting bracket. This means that the A antenna 110 is located behind the passive radiator radiating surface of the P antenna 120 and outside the P antenna 110's radome, forming two independent antennas with the A antenna 110. Here, the P antenna 120 is a passive antenna, comprising a passive radome and a passive radiating element within the passive radome. The passive radiating element has a passive radiator radiating surface. The A antenna 110 is an active antenna, comprising an active radome and an active radiating element within the active radome. In this layout, the A antenna 110 can be flexibly removably mounted on the P antenna 120's radome, meeting various A antenna 110 configuration requirements. Wind resistance does not increase with the addition of the A antenna 110 . The A antenna 110 and the P antenna 120 can meet different design requirements such as waterproofing and dustproofing, and on-site replacement and maintenance of the A antenna 110 and the P antenna 120 are simpler.

[0027] Unlike conventional antennas, which typically use aluminum alloy plates with a certain degree of strength and rigidity as the reflective and mounting surfaces for the oscillators of 4G antennas, the passive antenna in the integrated active and passive antenna must consider the performance requirements of the active element. A frequency selective surface is used in the passive antenna's orthographic projection area to replace the conventional metal reflective surface, thereby achieving the function of reflecting electromagnetic waves in one frequency band and transmitting electromagnetic waves in another. This allows radiating elements of different frequency bands to be distributed on the same side of the frequency selective surface or on both sides, increasing antenna deployment flexibility and conserving base station resources.

[0028] However, the operating environment of multi-band base station antennas integrating 4G and 5G is often complex. The electromagnetic waves radiated by radiators in one operating frequency band are affected not only by radiators in other operating frequency bands but also by the various components within the antenna. Therefore, dual-layer or even multi-layer frequency selective surfaces (FSSs) can significantly improve the performance of integrated multi-band fusion antennas.

[0029] Frequency selective surfaces (FSSs) are typically made of materials such as resin and plastic, and are relatively thin. They typically lack high rigidity and are relatively brittle. When the antenna vibrates, the FSS is susceptible to fracture and damage. Furthermore, a vibrator is often required, but placement of such a vibrator is often difficult due to the inherently weak rigidity of the FSS itself.

[0030] In order to achieve good support for the frequency selective surface and support the characteristics of easy scalability, a protective device is proposed according to the present invention. In summary, the protective device according to the present invention includes two longitudinal frames; and a transverse frequency selective surface support member, which is arranged between the two longitudinal frames, wherein fixing holes are respectively provided on both sides of the transverse frequency selective surface support member to respectively fix the frequency selective surface connected thereto. The protective device according to the present invention fixes the frequency selective surface with the help of the frame structure formed by the longitudinal frames, which can not only maintain good support for the frequency selective surface, but also achieve the stability of the frame structure and easy expansion.

[0031] The following is combined with Figure 2 To the attached Figure 4 To describe the specific structure of the protection device proposed by the present invention, those skilled in the art should understand that the specific embodiments herein are merely illustrative and not restrictive, and any technical solution that falls within the scope of protection outlined in the claims is the content claimed for protection by the present invention. Figure 2 FIG2 shows a schematic diagram of a protection device 200 according to an embodiment of the present invention. Figure 3 FIG. 1 shows a schematic diagram of a protection device 200 according to an embodiment of the present invention. Figure 4 FIG. 1 is a schematic diagram of a protection device 300 according to an embodiment of the present invention.

[0032] from Figure 2It can be seen that the protection device 200 proposed according to the present invention includes the following parts. First, the protection device 200 according to the present invention includes at least two longitudinal frames 101. In addition, the protection device 200 according to the present invention also includes a transverse frequency selective surface support 104, and the transverse frequency selective surface support 104 is arranged between the longitudinal frame 101 closer to the paper surface and the longitudinal frame 101 farther from the paper surface, wherein fixing holes (not shown in the figure) are respectively provided on both sides of the transverse frequency selective surface support 104 to respectively fix the frequency selective surface connected thereto. The protection device 200 according to the present invention fixes the frequency selective surface (not shown in the figure) by means of the frame structure formed by the longitudinal frame 101 closer to the paper surface and the longitudinal frame 101 farther from the paper surface, which can not only maintain good support for the frequency selective surface (not shown in the figure), but also achieve the stability of the frame structure and is easy to expand. Figure 2 In addition to the above-mentioned components, the protection device 200 according to the present invention can optionally include a plurality of lateral frequency selective surface supports 104. Figure 2 Ten transverse frequency selective surface supports 104 are shown. Those skilled in the art will appreciate that the ten transverse frequency selective surface supports 104 are merely exemplary and non-restrictive. A corresponding number of transverse frequency selective surface supports 104 can be flexibly arranged according to the size of the frequency selective surface. Compared to conventional methods, traditional single-layer frequency selective surfaces are fixed by frames on both sides, or by adding oscillator supports to the frames to assist in intermediate hoisting. This connection method is no longer suitable for stacking and assembling double-layer or even multi-layer frequency selective surfaces. To address the problem of stacking and assembling double-layer or even multi-layer frequency selective surfaces, the present invention first constructs a "well"-shaped assembly frame for the frequency selective surface, providing a stable and reliable bearing surface for the frequency selective surface. The frequency selective surface is then mounted and fixed on both sides of the frame. If the number of layers of the frequency selective surface needs to be increased, simply add a stacking assembly of intermediate transverse supports, and then stack and install the multiple layers of frequency selective surfaces.

[0033] Here, the longitudinal frame 101 (for example, implemented as a longitudinal phase shifter frame 101), the joint panel 102 and the transverse frame 103 (for example, implemented as a transverse reinforcement beam 103) form a rigid frame, and the transverse frequency selective surface support 104 (for example, implemented as a plastic support 104) used in the active antenna area is fastened to the phase shifter frames 101 on both sides with screws or rivets. On the one hand, it forms a tic-tac-toe frame structure with higher strength and partial elasticity with the rigid frame; on the other hand, it provides a stable and reliable bearing surface for the frequency selective surface. The frequency selective surface is then installed and fixed on both sides of the frame. Figure 3 As shown, Figure 3The middle and lower frequency selective surfaces 201 are mounted on the back of the lateral frequency selective surface support 104, and the upper frequency selective surface 202 is mounted on the front of the lateral frequency selective surface support 104. The upper and lower frequency selective surfaces 201 and 202 are connected to the lateral frequency selective surface support 104 by means of rivets or screws. The oscillator assembly 203 is then assembled above the upper frequency selective surface 202, and its assembly position falls above the supporting beam. The connection can also be made by means of rivets or screws. Figure 3 In the figure, the FSS support member and the FSS utilize a faceted contact structure to minimize contact, thereby reducing interference from the support member on the FSS's transmitted wave signal. Vias are provided on the faceted structure for securing the FSS, and features on both sides connect the lateral FSS support members 104 to the longitudinal frame 101. After the FSS is assembled with the crisscross frame, the overall structure maintains rigidity without sacrificing flexibility, effectively protecting the solder joints between the oscillator and the phase cable.

[0034] Furthermore, in addition to the aforementioned components, the protective device 200 according to the present invention can optionally include, for example, a transverse frame 103. Of course, those skilled in the art will appreciate that the transverse frame 103 herein is merely exemplary and non-limiting, and that including at least one transverse frame 103 may include multiple transverse frames 103. In this manner, the transverse frame 103 can be used to support and secure the longitudinal frame 101, thereby enhancing the structural strength of the protective device 200 according to the present invention. Furthermore, the protective device 200 according to the present invention can optionally include, for example, a connector panel 102, which enables necessary electrical connections.

[0035] exist Figure 2 In the embodiment shown, fixing holes for fixing the frequency selective surface are provided on both the front and back sides of the lateral frequency selective surface support member 104. Figure 3 As shown, frequency selective surfaces are provided on both the front and back sides of the frequency selective surface support 104, namely, the upper frequency selective surface 202 and the lower frequency selective surface 201. These two frequency selective surfaces 201 and the frequency selective surface 202 are respectively connected to the lateral frequency selective surface support 104 by means of fixing holes correspondingly provided on the lateral frequency selective surface support 104. In addition, the lateral frequency selective surface support 104 forms a supporting platform around the fixing hole, and the supporting platform is constructed to support the frequency selective surface 201 or 202 connected thereto. In this way, on the one hand, the frequency selective surface 201 or 202 can be well supported, and on the other hand, the performance of the frequency selective surface 201 or 202 is not affected. In addition, as Figure 3As shown, the front mounting fixing holes and the back mounting fixing holes are staggered, and the surfaces around the fixing holes that are in contact with the frequency selective surface are partially raised to reduce the contact area, thereby reducing the interference of the support member on the wave-transmitting signal of the frequency selective surface.

[0036] According to the technical solution of the present invention, the protection device further includes: a stacked frequency selective surface support, which is arranged on one side of the lateral frequency selective surface support to connect another frequency selective surface. In this way, the protection device according to the present invention can support multiple layers of frequency selective surfaces, thereby optimizing the radio frequency performance of the antenna including the protection device according to the present invention. The lateral frequency selective surface support 104 also includes a radiation element fixing portion, which is constructed to connect and fix the radiation element connected thereto, such as the radiation element 203. In this way, the protection device 200 according to the present invention can not only support the frequency selective surface 201 or 202, but also support the corresponding radiation element 203, thereby further optimizing the radio frequency performance of the antenna including the protection device 200 according to the present invention.

[0037] Preferably, a phase shifter is provided in the longitudinal frame 101. In this manner, the longitudinal frame 101, in addition to supporting the frequency selective surface 201 or 202, can also function as part of the phase shifter, thereby making the structure of the antenna including the protective device 200 according to the present invention more compact, thereby optimizing the performance of the antenna including the protective device 200 according to the present invention.

[0038] In the technical solution according to the present invention, the transverse frequency selective surface support member is provided with connectors at both ends for fixed connection to the longitudinal frame. In this manner, the transverse frequency selective surface support member and the corresponding longitudinal frame can be supported and fixed by means of the connectors, thereby enhancing the structural strength of the protective device according to the present invention.

[0039] In the technical solution according to the utility model, a phase cable fixing groove and / or a main feeder fixing groove are provided around the connecting member. In this way, the protective device according to the utility model can not only support the frequency selective surface, but also accommodate the phase cable and / or main feeder required by the antenna.

[0040] In the technical solution according to the utility model, adjustment member fixing pins and / or adjustment member fixing buckles are provided extending outwardly from both ends of the lateral frequency selective surface support member. In this way, the adjustment member fixing pins and / or adjustment member fixing buckles can be used to support and fix the longitudinal frame, thereby enhancing the structural strength of the protective device according to the utility model.

[0041] That is to say, both ends of the frequency selection surface support 104 also have the function of fixing cables and isolating debugging parts. For example, through-holes can be used to connect the horizontal frequency selection surface support 104 to the longitudinal frame 101, and grooves can also be provided to serve as wire grooves for phase cables to fix the cables. In addition, additional grooves can be provided, such as wire grooves for main feed cables, to fix cables, which effectively solves the problems of looseness and jittering of the antenna during use, prevents cables from being worn due to external friction, and thus protects the performance indicators of the antenna. These features are implemented as positioning pins or fixing hooks, for example, and their common function is to fix the side isolation debugging parts. The integrated design reduces the cost of additional materials and effectively saves space inside the antenna.

[0042] In the technical solution according to the present invention, the protection device includes at least two layers of frequency selective surfaces. In this way, the protection device according to the present invention can protect the at least two layers of frequency selective surfaces.

[0043] Furthermore, a frequency selective surface having more than two layers may also be provided, for example three or more layers. Figure 4 FIG. 3 shows a schematic diagram of a protection device 300 according to the present invention. Figure 4 It can be seen that Figure 4 The embodiment shown is a frequency selective surface with more layers stacked below or above the lateral frequency selective surface support. Figure 4 The embodiment shows a schematic diagram of the assembly of three-layer frequency selective surfaces and a frame. The three-layer frequency selective surfaces 2201, 2202 and 2203 are fixed to the longitudinal frames on both sides via the lateral frequency selective surface supports 1101 and 1102. Figure 4In the process, the lower frequency selective surface 2201 is first fixed to the lower surface of the lower horizontal frequency selective surface support 1101, and the fixing method can be screws or rivets. Then, the second frequency selective surface 2202 is laid flat on the upper surface of the lower horizontal frequency selective surface support 1101, and the horizontal frequency selective surface stacking frequency selective surface support 1102 (i.e., another frequency selective surface support) is stacked and pressed on the upper surface of the second frequency selective surface 2202, corresponding to the assembly holes of the lower horizontal frequency selective surface support 1101 one by one, and then pressed and fixed with screws or rivets. Finally, the upper frequency selective surface 2203 is stacked and assembled, and similarly laid flat on the upper surface of the stacked frequency selective surface support 1102 and pressed and fixed with screws or rivets. If more layers of frequency selective surfaces need to be stacked, they can be assembled in the same way with the frequency selective surface stacking frequency selective surface support. After the frequency selective surface assembly is assembled, the vibrator assembly 203 is assembled above the top frequency selective surface 2203. The assembly position falls above the stacked frequency selective surface support member, and the connection can also be made by riveting, screw fastening, etc. As for the material selection of the multi-layer frequency selective surface, each layer can use a base material of fiber / resin composite material, flexible plastic film, etc., a metal mesh sheet can be used, or each layer can be composed of a stacked combination of the above different materials. The metal mesh sheet has a more stable processing process, which is conducive to stable electrical performance in terms of radio frequency. It also compresses the stacking height of the multi-layer frequency selective surface in space, making the antenna flatter and more affordable. In other words, the protective device 300 also includes at least one stacked frequency selective surface support member, which is arranged on one side of the lateral frequency selective surface support member to connect to another frequency selective surface. In this way, the protective device according to the present invention can support multiple layers of frequency selective surfaces, thereby optimizing the radio frequency performance of the antenna including the protective device according to the present invention.

[0044] In addition, the second aspect of the present invention further discloses an antenna, which includes the protection device according to the first aspect of the present invention.

[0045] The protective device 200 or 300 proposed by the present invention allows for the effective and reliable assembly of dual-layer or even multi-layer frequency selective surfaces. It also addresses the problem of insufficient rigidity in multi-layer frequency selective surfaces, which can easily break and damage the frequency selective surfaces when the antenna vibrates. Furthermore, the protective device 200 or 300 proposed by the present invention enhances the overall rigidity of the antenna frame structure and solves the problem of placing a vibrator on the frequency selective surface.

[0046] Here, the multi-layer frequency selective surface according to the present invention can be made of a fiber / resin composite material, a flexible plastic film, or a metal mesh sheet, or a combination of the above materials. In addition, the "well" frame structure composed of horizontal and vertical strip-shaped structural members has the advantages of a large spatial span, high rigidity, a simple and clear force path, strong torsion resistance, and a reduced structural height. Furthermore, the overall frame maintains rigidity without sacrificing elasticity, providing a stable and reliable mounting carrier for the vibrator installation. The vibrator installation is relatively free, while effectively protecting the vibrator's welding points. It also provides a bearing surface for the installation of the antenna cover support.

[0047] To sum up, in the technical solution according to the present invention, the protective device according to the present invention fixes the frequency selective surface with the help of the frame structure formed by the longitudinal frame, which can not only maintain good support for the frequency selective surface, but also achieve the stability of the frame structure and is easy to expand.

[0048] The above description is merely an optional embodiment of the present invention and is not intended to limit the embodiments of the present invention. For those skilled in the art, the embodiments of the present invention may be modified and varied in various ways. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the embodiments of the present invention shall be included in the scope of protection of the embodiments of the present invention.

[0049] Although embodiments of the present invention have been described with reference to several specific embodiments, it should be understood that the embodiments of the present invention are not limited to the specific embodiments disclosed. The embodiments of the present invention are intended to cover various modifications and equivalent arrangements included within the spirit and scope of the appended claims. The scope of the claims is to be accorded the broadest interpretation so as to encompass all such modifications and equivalent structures and functions.

Claims

1. A protection device for protecting a frequency selective surface, characterized in that: The protection device comprises: two longitudinal frames; and a transverse frequency selective surface support disposed between the two longitudinal frames, Wherein, fixing holes are respectively provided on both sides of the lateral frequency selective surface supporting member so as to respectively fix the frequency selective surfaces connected thereto.

2. The protection device according to claim 1, characterized in that The protection device further comprises: A stacked frequency selective surface support is provided on one side of the lateral frequency selective surface support to connect to another frequency selective surface.

3. The protection device according to claim 1, characterized in that: The lateral frequency selective surface support further includes a radiation element fixing portion configured to connect and fix the radiation element connected thereto.

4. The protection device according to claim 1, characterized in that The lateral frequency selective surface support forms a support platform around the fixing hole, and the support platform is configured to support the frequency selective surface connected thereto.

5. The protection device according to claim 1, characterized in that: A phase shifter is provided in the longitudinal frame.

6. The protection device according to claim 1, characterized in that The lateral frequency selective surface support is provided with connecting members at both ends thereof for fixed connection to the longitudinal frame.

7. The protection device according to claim 6, characterized in that Phase cable fixing grooves and / or main feeder fixing grooves are arranged around the connecting piece.

8. The protection device according to claim 6, characterized in that: Adjustment member fixing pins and / or adjustment member fixing buckles are provided extending outwards from both ends of the lateral frequency selection surface support member.

9. The protection device according to claim 1, characterized in that: The protection device comprises at least two layers of frequency selective surfaces.

10. The protection device according to claim 1, characterized in that: The protection device also includes at least one transverse frame.

11. An antenna, characterized in that: The antenna comprises a protection device according to any one of claims 1 to 10.

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