Large-size flexible array antenna capable of being repeatedly disassembled and assembled by using magic tapes

Abstract

The invention belongs to the technical field of wireless communication, and aims to solve the problems that most of existing direct-injection type flexible film antennas are two-dimensional planar microstrip arrays, the working bandwidth is narrow, traditional gluing precision is low, the position is difficult to adjust, a large-aperture antenna is inconvenient to transport and erect, and the requirement for light weight of a UHF-band high-gain large-size antenna of a floating platform is difficult to meet. The invention provides a large-size flexible array antenna capable of being repeatedly disassembled and assembled through hook-and-loop fasteners. The large-size flexible array antenna comprises a top-layer flexible film, a radiation dipole vertical film, a bottom-layer flexible film, an assembly truss and a light-weight framework. The top layer and the radiation dipole are vertical, the joint of the bottom layer flexible film and the light-weight framework is connected with a back adhesive magic tape, and the assembly truss is connected in series with the light-weight framework. Light weight of the UHF-band large-size antenna is achieved so as to adapt to a floating platform, repeated three-dimensional disassembly and assembly can be achieved through the hook-and-loop fasteners, transportation and erection are facilitated, meanwhile, high gain and impedance matching performance of the antenna are guaranteed, and a reliable scheme is provided for the low-band high-gain antenna.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of wireless communication, in particular to a large-size flexible array antenna capable of being repeatedly disassembled and assembled by using magic tape. BACKGROUND

[0002] The floating platform antenna is the "eyes" and "ears" of the floating load, and plays a decisive role; due to the long action distance, the floating platform antenna is required to have high gain; in addition, in order to meet the requirements of multi-function, multi-band, large capacity and the like, the floating platform antenna inevitably tends to be large aperture; in order to meet the requirement of lightweight of the large aperture antenna of the floating platform, the foreign countries first proposed a thin film antenna technical scheme, which uses a thin film structure to replace the traditional rigid antenna fixed panel, so that the weight of the antenna can be greatly reduced. At present, the Jet Propulsion Laboratory (JPL) of the United States, the Canadian Space Agency (CSA) and the German Aerospace Center (DLR) have successively carried out thin film antenna technology research, and have developed a variety of ten-meter-level thin film antenna deployment mechanism principle prototypes, which verify the feasibility of the thin film antenna technical scheme.

[0003] The basic design idea of the thin film antenna is to process the radio frequency devices such as the antenna radiation unit and the feed network on the flexible film surface in layers, so as to form a multi-layer thin film array structure; at present, the flexible thin film antenna has a direct type and a reflective type, the reflective type flexible thin film antenna is a passive antenna, the reflecting surface is unfolded and formed by a thin film structure, and the feed source is placed outside the reflecting surface, and the representative design has the X-band inflatable thin film reflectarray antenna designed by the Jet Propulsion Laboratory of the United States. The thin film reflectarray antenna is first folded into a "Z" shape and then rolled into a cylindrical shape; when unfolded, the inflatable beams on both sides are inflated first, and then the elastic energy of the folding hinge drives the support frame to be completely unfolded, the total mass of the thin film antenna is 22.95 kg, the effective area is 50.265 m2, and the surface density is 0.674 kg / m2. The direct type flexible thin film antenna has the characteristics of relatively more simple structure form and more flexible beam, but the direct type space flexible thin film antenna puts forward challenges to the research contents such as flexible composite material structure and flexible electronic circuit technology; the design, analysis and manufacturing of the space tensile thin film structure integrated with reliable flexible electronic circuit are the core to realize light weight, high storage ratio and flexible beam. SUMMARY

[0004] The present application aims to provide a large-size flexible array antenna capable of being repeatedly disassembled and assembled by using magic tape, so as to solve the problems in the prior art that the direct type flexible thin film antenna is mostly two-dimensional planar microstrip array, the working bandwidth is narrow, the traditional gluing precision is low, the position is difficult to adjust after gluing, the large aperture antenna is inconvenient to transport and erect, and it is difficult to meet the requirements of the floating platform UHF frequency band high gain large size antenna lightweight.

[0005] The embodiment of the present application is implemented as follows: The embodiment of the present application provides a large-size flexible array antenna which can be repeatedly disassembled and assembled by using magic tape, which comprises a top flexible film used as a broadband angular impedance matching layer, a vertical dipole film, a bottom flexible film used as a metal reflecting floor, a plurality of assembly trusses and a plurality of lightweight skeletons. The positions of the top flexible film, the vertical dipole film and the bottom flexible film on the plurality of lightweight skeletons are connected with the back adhesive magic tape. The plurality of assembly trusses are connected in series with the plurality of lightweight skeletons. The outer side of the top flexible film is periodically etched with a plurality of square patches. The vertical dipole film is arranged at equal intervals in the vertical direction, and the vertical dipole film is etched with a dipole pattern corresponding to a frequency band. One side of the bottom flexible film is fully plated with metal.

[0006] In use, the back adhesive magic tape is first pasted on the side, top and bottom of the lightweight skeleton, and then the vertical dipole film, the top flexible film and the bottom flexible film are pasted on the corresponding positions of the lightweight skeleton to complete the assembly of the lightweight skeleton and the films.

[0007] The large-size flexible array antenna which can be repeatedly disassembled and assembled by using magic tape disclosed by the embodiment can realize tensioning and shaping of the top flexible film, the vertical dipole film and the bottom flexible film and interlayer shape and position accuracy control, and can realize the three-dimensional repeated disassembly and assembly of the films and the lightweight skeleton by relying on the back adhesive magic tape, thereby effectively solving the problems of difficulty in implementing high-precision gluing process of large-size flexible substrate and inability to adjust the position after gluing, facilitating the transportation and erection of large-aperture antennas. The square patches periodically etched on the top flexible film can improve the impedance matching characteristics during wide-angle scanning of the array antenna, the vertical dipole film can realize stable radiation of UHF electromagnetic waves, and the bottom flexible film can totally reflect electromagnetic waves, and the assembly truss placed along the X axis can fix the lightweight skeleton, thereby realizing the lightweight design of the UHF high-gain large-size wideband array antenna, providing a high-reliability solution for the aperture requirement of low-frequency high-gain antennas, and further making the large-size flexible array antenna which can be repeatedly disassembled and assembled by using magic tape have the beneficial effects of realizing the lightweight design of the UHF large-size antenna, adapting to the floating platform, realizing the three-dimensional repeated disassembly and assembly, facilitating the transportation and erection, ensuring the high-gain and impedance matching performance of the antenna, and providing a reliable solution for the low-frequency high-gain antenna.

[0008] As a preferred scheme of the present application: the above-mentioned back adhesive magic tape has a nap surface and a prickle surface, the side of the above-mentioned nap surface away from the above-mentioned prickle surface has a first adhesive surface, the side of the above-mentioned prickle surface away from the above-mentioned nap surface has a second adhesive surface, the above-mentioned second adhesive surface of the above-mentioned back adhesive magic tape is attached to a plurality of the above-mentioned lightweight skeletons, and the above-mentioned first adhesive surface of the above-mentioned back adhesive magic tape is attached to the above-mentioned top flexible film or the above-mentioned vertical film of the radiation dipole or the above-mentioned bottom flexible film.

[0009] In this way, the above-mentioned nap surface is a surface with fine soft fibers and round hairs, and the above-mentioned prickle surface is a surface with soft and hard barbed hairs. On the one hand, the above-mentioned first adhesive surface and the above-mentioned second adhesive surface can realize the stable pre-fixing of the above-mentioned back adhesive magic tape and the above-mentioned lightweight skeletons, the above-mentioned top flexible film, the above-mentioned bottom flexible film and the above-mentioned vertical film of the radiation dipole, and provide a reliable basis for subsequent three-dimensional disassembly. On the other hand, the attachment position relationship of the above-mentioned back adhesive magic tape and each component can be clearly defined to avoid attachment misalignment during assembly. At the same time, relying on the separable characteristics of the above-mentioned nap surface and the above-mentioned prickle surface of the above-mentioned back adhesive magic tape, the problem of low bonding accuracy of large-size flexible substrates and the inability to adjust the position after bonding in the traditional direct bonding process can be effectively solved, the repeatable three-dimensional disassembly of large-size flexible films can be realized, the convenience of large-aperture antenna transportation and erection can be greatly improved, and the structural stability and assembly flexibility of the antenna under the high-gain radiation demand of the UHF frequency band can be ensured.

[0010] As a preferred scheme of the present application: a plurality of the above-mentioned lightweight skeletons are provided with a plurality of mechanical installation interfaces at both ends, and a plurality of the above-mentioned assembly trusses are sequentially connected in a plurality of the above-mentioned mechanical installation interfaces of a plurality of the above-mentioned lightweight skeletons.

[0011] In this way, the precise positioning and stable connection of a plurality of the above-mentioned lightweight skeletons can be realized by the serial connection of the above-mentioned mechanical installation interfaces and the above-mentioned assembly trusses, the overall structural regularity of the above-mentioned lightweight skeleton array can be effectively ensured, and the tensioning and shaping effect and interlayer shape accuracy of the above-mentioned top flexible film, the above-mentioned vertical film of the radiation dipole and the above-mentioned bottom flexible film can be ensured. In addition, this serial assembly method simplifies the assembly process of large-size antennas, facilitates quick erection after transportation, and can improve assembly versatility through standardized design of the above-mentioned mechanical installation interfaces to avoid the problems of loose structure and inaccurate positioning in traditional assembly methods, thereby providing reliable structural support for stable operation and lightweight demand of large-aperture flexible array antennas in the UHF frequency band.

[0012] As a preferred scheme of the present application: one side of the above-mentioned lightweight skeleton has a side bonding surface, and the above-mentioned vertical film of the radiation dipole is connected to the above-mentioned side bonding surface through the above-mentioned back adhesive magic tape.

[0013] Thus, the side adhesive surface serves as a clear and regular installation reference for the back adhesive Velcro, ensuring the accurate connection position of the radiation dipole vertical film and the lightweight framework, and guaranteeing the layer shape accuracy of the three-dimensional antenna structure. In addition, compared with the traditional direct gluing method, the connection mode of the back adhesive Velcro allows the radiation dipole vertical film to be repeatedly disassembled, which not only solves the problem of high-precision gluing of large-size flexible substrates and the inability to adjust the position after gluing, but also facilitates the individual maintenance or replacement of the radiation dipole vertical film. In combination with the tensioning and shaping effect of the lightweight framework, the structural stability of the radiation dipole vertical film is further guaranteed, providing convenience for the transportation, erection, and later maintenance of large-size flexible array antennas.

[0014] As a preferred scheme of the present application: the top of the lightweight framework has a top adhesive surface, the bottom of the lightweight framework has a bottom adhesive surface, and the top layer flexible film and the bottom layer flexible film are connected to the top adhesive surface and the bottom adhesive surface respectively through the back adhesive Velcro.

[0015] Thus, on the one hand, the top adhesive surface and the bottom adhesive surface serve as clear references, ensuring the accurate connection position of the top layer flexible film and the bottom layer flexible film with the lightweight framework, and guaranteeing the layer shape accuracy between the two and the lightweight framework and the radiation dipole vertical film, thereby maintaining the stable wide-angle impedance matching and electromagnetic wave reflection performance of the antenna in the UHF frequency band. On the other hand, the connection mode of the back adhesive Velcro avoids the problems of low bonding accuracy and the inability to adjust the position after bonding of the large-size top layer flexible film and bottom layer flexible film in the traditional direct gluing process, allowing the two to be repeatedly disassembled, which facilitates the disassembly and storage during transportation and efficient assembly during erection of the large-aperture antenna, and provides convenience for the later maintenance or replacement of the film. In combination with the tensioning and shaping effect of the lightweight framework on the film, the structural stability of the top layer flexible film and the bottom layer flexible film is further guaranteed, meeting the lightweight and high-reliability design requirements of large-size flexible array antennas.

[0016] As a preferred scheme of the present application: the rough surface of the back adhesive Velcro is attached to the top layer flexible film, the radiation dipole vertical film, and the bottom layer flexible film through the first glue surface respectively, and the prong surface of the back adhesive Velcro is attached to the side adhesive surface, the top adhesive surface, and the bottom adhesive surface of the lightweight framework through the second glue surface respectively.

[0017] Thus, the first adhesive surface and the second adhesive surface can realize stable pre-fixing of the back adhesive magic tape, the top flexible film, the radiation dipole vertical film, the bottom flexible film, the side adhesive surface, the top adhesive surface and the bottom adhesive surface, and the corresponding fitting relationship can ensure the installation position accuracy of the top flexible film and the bottom flexible film on the lightweight framework, guarantee the layer-to-layer shape accuracy of the three-dimensional antenna structure, and further maintain the wide-angle impedance matching, electromagnetic wave radiation and reflection performance stability in the UHF frequency band. In addition, the detachable characteristics of the rough surface and the pricked surface of the back adhesive magic tape can realize the repeated three-dimensional disassembly and assembly of the top flexible film, the radiation dipole vertical film and the bottom flexible film, effectively solve the problems of low bonding accuracy and position adjustment difficulty after bonding in the traditional direct bonding process, facilitate the disassembly and storage during transportation and efficient assembly during erection of the large-aperture antenna, and provide convenience for the separate maintenance or replacement of the films in the later period. In combination with the tensioning and shaping effect of the lightweight framework, the film structure stability is further guaranteed, which meets the lightweight and high reliability design requirements of the large-size flexible array antenna.

[0018] As a preferred scheme of the present application: the lightweight framework is composed of a composite material based on a foaming filling process, and the lightweight framework is installed between the top flexible film and the bottom flexible film along the YOZ plane.

[0019] Thus, the lightweight framework is realized by the characteristics of the composite material to adapt to the floating platform, the top flexible film and the bottom flexible film are stably supported and tensioned and shaped by the specific installation position, the radiation dipole vertical film is provided with an installation carrier, the layer-to-layer shape accuracy of the three-dimensional antenna structure is ensured, the UHF frequency band high-gain radiation performance is maintained, and the drawbacks of the traditional rigid framework are avoided, which is beneficial to the transportation and erection of the antenna.

[0020] As a preferred scheme of the present application: the radiation dipole vertical film is installed on one side of the plurality of lightweight frameworks along the YOZ plane.

[0021] Thus, the installation position of the radiation dipole vertical film can be accurately ensured by the clear installation surface and the support of the framework, the layer-to-layer shape accuracy and the UHF frequency band radiation performance of the top flexible film and the bottom flexible film are guaranteed, the repeated disassembly and assembly can be realized in combination with the back adhesive magic tape, the position adjustment difficulty and the disassembly and assembly inconvenience of the traditional installation are solved, and the transportation, erection and maintenance of the antenna are facilitated.

[0022] As a preferred scheme of the present application: the assembly truss is connected in series at both ends of the plurality of lightweight frameworks along the X axis.

[0023] In this way, the lightweight framework is firmly connected, the overall structure regularity and interlayer shape and position accuracy are ensured, the large-size antenna assembly process is simplified, and transportation is facilitated.

[0024] As a preferred scheme of the present application: the polyimide soft boards in the top flexible film, the vertical dipole radiation film and the bottom flexible film are all etched by high-precision photoetching process, and the etching accuracy is controlled within ±0.1 mm.

[0025] In this way, the size and arrangement accuracy of the circuit pattern on the top flexible film, the vertical dipole radiation film and the bottom flexible film are ensured, the wide-angle impedance matching and stable electromagnetic wave radiation performance of the antenna in the UHF frequency band are ensured, the antenna performance deviation caused by insufficient etching accuracy is avoided, and a reliable circuit structure foundation is provided for the large-size flexible array antenna to realize high-gain radiation.

[0026] As a preferred scheme of the present application: the first adhesive surface and the second adhesive surface of the back adhesive magic tape are both high-temperature-resistant pressure-sensitive adhesive, the high-temperature-resistant range is 40-85℃, and the bonding strength is ≥5N / cm. .

[0027] In this way, the first adhesive surface and the second adhesive surface can be adapted to the complex temperature and humidity environment of the floating platform outdoors, the bonding stability between the back adhesive magic tape and the top flexible film, the vertical dipole radiation film, the bottom flexible film and the lightweight framework is ensured, the connection loosening of the antenna during use or transportation is prevented, the interlayer shape and position accuracy of the three-dimensional structure and the stable radiation performance in the UHF frequency band are ensured, a reliable bonding foundation is provided for repeated disassembly, and the high-reliability requirement of the large-size flexible array antenna is met.

[0028] As a preferred scheme of the present application: the side bonding surface, the top bonding surface and the bottom bonding surface of the lightweight framework are all provided with positioning grooves, the depth of the positioning grooves is 0.5-1 mm, and the width is consistent with the width of the back adhesive magic tape.

[0029] In this way, the back adhesive magic tape is provided with accurate installation and positioning, the offset of the back adhesive magic tape during lamination is avoided, the connection position accuracy of the top flexible film, the vertical dipole radiation film and the bottom flexible film and the lightweight framework is ensured, the interlayer shape and position accuracy of the three-dimensional structure of the antenna is ensured, the stable radiation performance in the UHF frequency band is maintained, the stability of the lamination of the back adhesive magic tape and the lightweight framework is improved, a reliable foundation is provided for repeated disassembly, and the antenna assembly and maintenance are facilitated.

[0030] As a preferred scheme of the present application: the inner wall of the mechanical mounting interface is provided with internal threads, and the corresponding positions of the assembly truss are provided with external threads.

[0031] In this way, the precise and stable connection of the two is achieved through thread cooperation, ensuring the structural stability of the lightweight framework and the assembly truss after assembly, avoiding loosening of the antenna during transportation or work; at the same time, the threaded connection facilitates disassembly and reassembly on demand, simplifying the transportation and storage process of large-size antennas and further ensuring the interlayer shape and position accuracy of the three-dimensional structure of the antenna, providing reliable structural support for stable operation in the UHF frequency band.

[0032] As a preferred scheme of the present application: the assembly truss is made of carbon fiber composite material, the cross section of the assembly truss is cylindrical, and the surface of the assembly truss is coated with an anti-static coating.

[0033] In this way, the lightweight assembly truss is realized by taking advantage of the characteristics of carbon fiber composite material, which meets the weight reduction requirements of the aerostat platform antenna, and the cylindrical cross section ensures the structural support strength, while the anti-static coating can avoid static interference with the radio frequency performance of the antenna, ensuring stable operation in the UHF frequency band, and providing reliable support for the stable assembly of the lightweight framework and the overall transportation and erection of the antenna.

[0034] As a preferred scheme of the present application: the edges of the square patches on the top layer of flexible film are designed with a circular arc transition.

[0035] In this way, it is beneficial to reduce the electric field concentration effect of the edges of the square patches, and improve the impedance matching characteristics of the antenna.

[0036] In summary, the large-size flexible array antenna disclosed in the present application has the beneficial effects of realizing lightweight large-size UHF frequency band antenna, adapting to aerostat platform, realizing repeatable three-dimensional disassembly and assembly, facilitating transportation and erection, ensuring high gain and impedance matching performance of the antenna, and providing a reliable solution for low frequency high gain antenna. BRIEF DESCRIPTION OF DRAWINGS

[0037] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the embodiments. It should be understood that the following drawings only show some embodiments of the present application, and therefore should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can also be obtained without creative labor.

[0038] Figure 1 The structure diagram of the large-size flexible array antenna realized by magic tape in the embodiment of the present application; Figure 2 Figure 1 is a schematic diagram of a single subarray structure of a large-size flexible array antenna with repeatable disassembly and assembly using magic tape according to an embodiment of the present application; Figure 3 Figure 2 is a schematic diagram of a structure of a radiation dipole vertical film and a lightweight skeleton according to an embodiment of the present application; Figure 4 Figure 3 is an enlarged view of a local detail of a top flexible film according to an embodiment of the present application; Figure 5 Figure 4 is an enlarged view of a detail of a square patch arrangement according to an embodiment of the present application; Figure 6 Figure 5 is an enlarged view of a local detail of a bottom flexible film according to an embodiment of the present application; Figure 7 Figure 6 is a three-dimensional view of a lightweight skeleton according to an embodiment of the present application; Figure 8 Figure 7 is a schematic diagram of a napped structure of a back adhesive magic tape according to an embodiment of the present application; Figure 9 Figure 8 is a schematic diagram of a pricked structure of a back adhesive magic tape according to an embodiment of the present application; Figure 10 Figure 9 is a schematic diagram of installation of a magic tape pricked surface on upper and lower adhesive surfaces of a lightweight skeleton according to an embodiment of the present application; Figure 11 Figure 10 is a schematic diagram of installation of a magic tape pricked surface on a side adhesive surface of a lightweight skeleton according to an embodiment of the present application; Figure 12 Figure 11 is a schematic diagram of pasting of a magic tape napped surface on a radiation dipole vertical film according to an embodiment of the present application; Figure 13 Figure 12 is a schematic diagram of pasting of magic tape napped surfaces on a top flexible film and a bottom flexible film according to an embodiment of the present application; Figure 14 Figure 13 is a normalized beam scanning pattern of a large-size flexible array antenna with repeatable disassembly and assembly using magic tape according to an embodiment of the present application at a typical operating frequency.

[0039] Legend: 1 - top flexible film, 2 - radiation dipole vertical film, 3 - bottom flexible film, 4 - assembly truss, 5 - lightweight skeleton, 6 - back adhesive magic tape, 7 - square patch, 8 - napped surface, 9 - pricked surface, 10 - first adhesive surface, 11 - second adhesive surface, 12 - mechanical mounting interface, 13 - side adhesive surface, 14 - top adhesive surface, 15 - bottom adhesive surface. DETAILED DESCRIPTION

[0040] In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the following will be combined with the accompanying drawings to make a clear and complete description of the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. The components of the embodiments of the present application described and shown in the accompanying drawings can be arranged and designed in various different configurations.

[0041] Therefore, the following detailed description of the embodiments of the present application provided in the accompanying drawings is not intended to limit the scope of the claimed present application, but only represents selected embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative labor are within the scope of protection of the present application.

[0042] Embodiment Referring to Figures 1-14 The embodiment provides a large-size flexible array antenna which can be repeatedly disassembled and assembled by using magic tape, comprising a top flexible film 1 used as a broadband angular impedance matching layer, a vertical dipole film 2, a bottom flexible film 3 used as a metal reflecting floor, a plurality of assembly trusses 4 and a plurality of lightweight skeletons 5. The top flexible film 1, the vertical dipole film 2 and the bottom flexible film 3 are connected with the back adhesive magic tape 6 at the positions of the plurality of lightweight skeletons 5. The plurality of assembly trusses 4 are connected with the plurality of lightweight skeletons 5 in sequence. A plurality of square patches 7 are periodically etched on the outer side of the top flexible film 1. The vertical dipole film 2 is arranged at equal intervals in the vertical direction, and a dipole pattern corresponding to a frequency band is etched on a single vertical dipole film 2. One side of the bottom flexible film 3 is entirely plated with metal.

[0043] In use, the back adhesive magic tape 6 is first pasted on the side, top and bottom of the lightweight skeleton 5, and then the vertical dipole film 2, the top flexible film 1 and the bottom flexible film 3 are pasted on the corresponding positions of the lightweight skeleton 5 to complete the assembly of a single group of lightweight skeletons 5 and the films. Finally, the assembly truss 4 is connected in sequence at both ends of the plurality of assembled lightweight skeletons 5 to realize the installation of the overall large-size flexible array antenna.

[0044] The large-size flexible array antenna which can be repeatedly disassembled and assembled by the magic tape has the advantages that the lightweight framework 5 is adopted, the tensioned shape of the top flexible film 1, the radiation dipole vertical film 2 and the bottom flexible film 3 and the interlayer shape and position accuracy control are realized, the three-dimensional disassembly and assembly of the flexible films and the lightweight framework 5 are realized by the back adhesive magic tape 6, the implementation difficulty of the high-precision gluing process of the large-size flexible substrate is effectively solved, the position after the gluing cannot be adjusted, the transportation and erection of the large-aperture antenna are facilitated, the impedance matching characteristics during the wide-angle scanning of the array antenna are improved by the periodic etching square patch 7 on the top flexible film 1, the stable radiation of the UHF frequency electromagnetic wave is realized by the radiation dipole vertical film 2, the electromagnetic wave is totally reflected by the bottom flexible film 3, the assembly and fixation of the lightweight framework 5 are realized by the assembly truss 4 arranged along the X axis, the lightweight design of the UHF frequency high-gain large-size wideband array antenna is realized, a high-reliability solution is provided for the low-frequency high-gain antenna aperture requirement, and the large-size flexible array antenna which can be repeatedly disassembled and assembled by the magic tape has the beneficial effects of realizing the lightweight design of the UHF frequency large-size antenna, adapting to the floating platform, realizing the three-dimensional disassembly and assembly, facilitating the transportation and erection, guaranteeing the high-gain and impedance matching performance of the antenna and providing a reliable solution for the low-frequency high-gain antenna.

[0045] Referring to Figures 1-14 The back adhesive magic tape 6 has a nap surface 8 and a prickle surface 9, the first adhesive surface 10 is arranged on the side of the nap surface 8 away from the prickle surface 9, the second adhesive surface 11 is arranged on the side of the prickle surface 9 away from the nap surface 8, the second adhesive surface 11 of the back adhesive magic tape 6 is attached to the lightweight frameworks 5, and the first adhesive surface 10 of the back adhesive magic tape 6 is attached to the top flexible film 1, the radiation dipole vertical film 2 or the bottom flexible film 3. The nap surface 8 is a surface with small soft fibers and round nap, and the prickle surface 9 is a surface with soft and hard hook prickle nap. On the one hand, the first adhesive surface 10 and the second adhesive surface 11 can realize the stable pre-fixing of the back adhesive magic tape 6 and the lightweight frameworks 5, the top flexible film 1, the bottom flexible film 3 and the radiation dipole vertical film 2, and provide a reliable basis for the subsequent three-dimensional disassembly and assembly. On the other hand, the attachment position relationship of the back adhesive magic tape 6 and each component can be clearly determined, and the attachment misalignment problem during the assembly can be avoided. Meanwhile, the separable characteristics of the nap surface 8 and the prickle surface 9 of the back adhesive magic tape 6 can effectively solve the problems of low bonding accuracy of the large-size flexible substrate and the unadjustable position after the bonding in the traditional direct bonding process, realize the three-dimensional disassembly and assembly of the large-size flexible film, greatly improve the convenience of the transportation and erection of the large-aperture antenna, and guarantee the structural stability and assembly flexibility of the antenna under the high-gain radiation requirement in the UHF frequency band.

[0046] A plurality of mechanical installation interfaces 12 are arranged at both ends of the lightweight skeleton 5, and the assembly trusses 4 are sequentially connected in series in the mechanical installation interfaces 12 of the lightweight skeleton 5. Thus, the precise positioning and stable connection of the plurality of lightweight skeletons 5 can be achieved by the series connection of the mechanical installation interfaces 12 and the assembly trusses 4, the overall structural regularity of the array of lightweight skeletons 5 is effectively ensured, and the tensioning and shaping effects of the top flexible film 1, the radiation dipole vertical film 2 and the bottom flexible film 3 and the interlayer shape and position accuracy are ensured. In addition, the series assembly mode simplifies the assembly process of the large-size antenna, facilitates quick erection after transportation, and improves the assembly versatility through the standardized design of the mechanical installation interfaces 12, avoiding the problems of loose structure and inaccurate positioning in the traditional assembly mode, and providing reliable structural support for the stable operation and lightweight demand of the large-aperture flexible array antenna in the UHF frequency band.

[0047] Referring to Figures 1-14 One side of the lightweight skeleton 5 has a side bonding surface 13, and the radiation dipole vertical film 2 is connected to the side bonding surface 13 by the adhesive-backed magic tape 6. Thus, the side bonding surface 13 can provide a clear and regular installation reference for the adhesive-backed magic tape 6, ensure the precise connection position of the radiation dipole vertical film 2 and the lightweight skeleton 5, and guarantee the interlayer shape and position accuracy of the three-dimensional structure of the antenna. In addition, compared with the traditional direct gluing method, the connection form of the adhesive-backed magic tape 6 can realize the repeated disassembly and assembly of the radiation dipole vertical film 2, which not only solves the problems of high-precision gluing difficulty of large-size flexible substrate and position adjustment after gluing, but also facilitates the individual maintenance or replacement of the radiation dipole vertical film 2. In addition, the tensioning and shaping effect of the lightweight skeleton 5 further guarantees the structural stability of the radiation dipole vertical film 2, and provides convenience for the transportation, erection and later maintenance of the large-size flexible array antenna.

[0048] The top of the lightweight framework 5 has a top bonding surface 14, the bottom of the lightweight framework 5 has a bottom bonding surface 15, and the top flexible film 1 and the bottom flexible film 3 are connected to the top bonding surface 14 and the bottom bonding surface 15 respectively by the back adhesive magic tape 6. On the one hand, the top bonding surface 14 and the bottom bonding surface 15 can be used as clear references to ensure the accurate connection position of the top flexible film 1 and the bottom flexible film 3 to the lightweight framework 5, guarantee the interlayer shape and position accuracy between the two and the lightweight framework 5 and the radiation dipole vertical film 2, and then maintain the wide-angle impedance matching and electromagnetic wave reflection performance stability of the antenna in the UHF frequency band. On the other hand, the connection mode of the back adhesive magic tape 6 avoids the problems of low bonding accuracy and the inability to adjust the position after bonding of the large-size top flexible film 1 and the bottom flexible film 3 in the traditional direct bonding process, realizes the repeated disassembly and assembly of the two, facilitates the disassembly and storage during transportation and efficient assembly during erection of the large-aperture antenna, and provides convenience for the maintenance or replacement of the films in the later period. At the same time, relying on the tensioning and shaping effect of the lightweight framework 5 on the films, the structural stability of the top flexible film 1 and the bottom flexible film 3 is further guaranteed, which meets the lightweight and high reliability design requirements of the large-size flexible array antenna.

[0049] The rough surface 8 of the back adhesive magic tape 6 is pasted on the top flexible film 1, the radiation dipole vertical film 2 and the bottom flexible film 3 respectively through the first adhesive surface 10, and the pricked surface 9 of the back adhesive magic tape 6 is pasted on the side bonding surface 13, the top bonding surface 14 and the bottom bonding surface 15 of the lightweight framework 5 respectively through the second adhesive surface 11. In this way, the first adhesive surface 10 and the second adhesive surface 11 can realize the stable pre-fixing of the back adhesive magic tape 6 and the top flexible film 1, the radiation dipole vertical film 2, the bottom flexible film 3, the side bonding surface 13, the top bonding surface 14 and the bottom bonding surface 15, and the corresponding fitting relationship can ensure the accurate installation position of the top flexible film 1 and the bottom flexible film 3 on the lightweight framework 5, guarantee the interlayer shape and position accuracy of the three-dimensional structure of the antenna, and then maintain the wide-angle impedance matching, electromagnetic wave radiation and reflection performance stability of the antenna in the UHF frequency band. In addition, relying on the separable characteristics of the rough surface 8 and the pricked surface 9 of the back adhesive magic tape 6, the top flexible film 1, the radiation dipole vertical film 2 and the bottom flexible film 3 can be repeatedly disassembled and assembled in three dimensions, effectively solving the problems of low bonding accuracy and the inability to adjust the position after bonding of the large-size flexible substrate in the traditional direct bonding process. It is convenient for disassembly and storage during transportation and efficient assembly during erection of the large-aperture antenna, and provides convenience for the individual maintenance or replacement of the films in the later period. At the same time, cooperating with the tensioning and shaping effect of the lightweight framework 5, the structural stability of the films is further guaranteed, which meets the lightweight and high reliability design requirements of the large-size flexible array antenna.

[0050] Referring to Figures 1-14The lightweight skeleton 5 is composed of a composite material based on a foaming filling process. The lightweight skeleton 5 is arranged between the top flexible film 1 and the bottom flexible film 3 along the YOZ plane. In this way, the lightweight skeleton 5 not only realizes lightweight to adapt to the aerostat platform due to the characteristics of the composite material, but also provides stable support for the top flexible film 1 and the bottom flexible film 3 due to the specific installation position, guarantees the tensioning and shaping effect, and provides an installation carrier for the radiation dipole vertical film 2, ensures the shape and position accuracy between the three-dimensional structure layers of the antenna, maintains the high-gain radiation performance in the UHF frequency band, avoids the drawbacks of the traditional rigid skeleton, and is beneficial to the transportation and erection of the antenna.

[0051] The radiation dipole vertical film 2 is arranged on one side of the plurality of lightweight skeletons 5 along the YOZ plane. In this way, the radiation dipole vertical film 2 can be accurately positioned due to the clear installation plane and the support of the skeleton, the interlayer shape and position accuracy and the UHF frequency band radiation performance of the top flexible film 1 and the bottom flexible film 3 can be guaranteed, and the radiation dipole vertical film 2 can be repeatedly disassembled and assembled with the back adhesive magic tape 6, which solves the problems of difficult adjustment and inconvenient disassembly and assembly of the traditional installation, and is beneficial to the transportation and maintenance of the antenna.

[0052] The assembly truss 4 is connected in series on both ends of the plurality of lightweight skeletons 5 along the X axis. In this way, the lightweight skeletons 5 can be stably connected, the overall structure regularity and the interlayer shape and position accuracy of the antenna can be guaranteed, and the assembly process of the large-size antenna can be simplified for convenient transportation.

[0053] The flexible array antenna has a normalized far-field beam scanning characteristic at a frequency of 500 MHz. In this way, the antenna can realize flexible beam pointing adjustment at the core working frequency point in the UHF frequency band, meet the high-gain radiation demand of the frequency band, adapt to the use requirements of the aerostat platform on the signal coverage range and the receiving or transmitting accuracy of the antenna, and guarantee the core radio frequency performance of the large-size flexible array antenna in the low frequency band application.

[0054] Referring to Figures 1-14 The polyimide soft boards in the top flexible film 1, the radiation dipole vertical film 2 and the bottom flexible film 3 all adopt a high-precision photoetching process to realize circuit pattern etching. The etching accuracy is controlled within ±0.1 mm, which can ensure the size and arrangement accuracy of the circuit pattern on the top flexible film 1, the radiation dipole vertical film 2 and the bottom flexible film 3, guarantee the wide-angle impedance matching and electromagnetic wave radiation performance of the antenna in the UHF frequency band, avoid the antenna performance deviation caused by insufficient etching accuracy, and provide a reliable circuit structure basis for realizing high-gain radiation of the large-size flexible array antenna.

[0055] The first adhesive surface 10 and the second adhesive surface 11 of the back adhesive magic tape 6 are both high-temperature-resistant pressure-sensitive adhesive. The high-temperature-resistant range is 40℃-85℃, and the adhesive strength is ≥5N / cm. , so as to adapt to the complex temperature and humidity environment of the floating platform, avoid the failure of the first adhesive surface 10 and the second adhesive surface 11 due to temperature changes, ensure the stable bonding between the adhesive-backed magic tape 6 and the top flexible film 1, the radiation dipole vertical film 2, the bottom flexible film 3 and the lightweight framework 5, prevent the antenna from being loose during use or transportation, ensure the shape and position accuracy between the three-dimensional structure layers and the stable UHF frequency band radiation performance, provide a reliable bonding basis for repeated disassembly and assembly, and meet the high reliability requirements of large-size flexible array antennas.

[0056] The side bonding surface 13, the top bonding surface 14 and the bottom bonding surface 15 of the lightweight framework 5 are provided with positioning grooves (not shown in the figure), the depth of the positioning grooves is 0.5mm-1mm, and the width is consistent with the width of the adhesive-backed magic tape 6, so as to provide accurate installation and positioning for the adhesive-backed magic tape 6, avoid the offset of the adhesive-backed magic tape 6 during bonding, ensure the connection position accuracy of the top flexible film 1, the radiation dipole vertical film 2 and the bottom flexible film 3 and the lightweight framework 5, further ensure the shape and position accuracy between the three-dimensional structure layers of the antenna, maintain the stable UHF frequency band radiation performance, improve the stability of the bonding between the adhesive-backed magic tape 6 and the lightweight framework 5, provide a reliable basis for repeated disassembly and assembly, and facilitate the assembly and maintenance of the antenna.

[0057] Referring to Figures 1-14 The inner wall of the mechanical installation interface 12 is provided with internal threads (not shown in the figure), and the corresponding positions of the assembly truss 4 are provided with external threads (not shown in the figure), so as to realize accurate and stable connection of the two by means of threaded connection, ensure the structural stability of the lightweight framework 5 and the assembly truss 4 after assembly, and avoid loose connection of the antenna during transportation or work. At the same time, the threaded connection is convenient for disassembly and reassembly on demand, simplifies the transportation and storage process and the on-site erection process of the large-size antenna, further ensures the shape and position accuracy between the layers of the three-dimensional structure of the antenna, and provides reliable structural support for its stable work in the UHF frequency band.

[0058] The assembly truss 4 is made of carbon fiber composite material, the cross section of the assembly truss 4 is cylindrical, and the surface of the assembly truss 4 is coated with an anti-static coating (not shown in the figure), so as to realize lightweight of the assembly truss 4 by the characteristics of carbon fiber composite material, meet the weight reduction requirements of the floating platform antenna, ensure the structural support strength by the cylindrical cross section, and avoid static interference with the radio frequency performance of the antenna by the anti-static coating, so as to ensure its stable work in the UHF frequency band, and provide reliable support for the stable assembly of the lightweight framework 5 and the overall transportation and erection of the antenna.

[0059] The edges of the square patch 7 on the top flexible film 1 are designed with a circular arc transition, which is conducive to reducing the electric field concentration effect of the edges of the square patch 7 and improving the impedance matching characteristics of the antenna.

[0060] Referring to Figures 1-14In the embodiment, the top flexible film 1 is a single-sided copper-coated polyimide soft board, the polyimide film has a thickness of 50 μm, the copper coating has a thickness of 18 μm, the total area is 2.4 m x 6 m and is arranged in the horizontal direction, and 24 x 60 square patches 7 are periodically etched thereon.

[0061] Referring to Figures 1-14 In the embodiment, the twenty radiation dipole vertical films 2 are arranged at equal intervals in the vertical direction, and each radiation dipole vertical film 2 is a double-sided copper-coated polyimide soft board, the polyimide film has a thickness of 50 μm, the double-sided copper coating has a thickness of 18 μm, and a dipole pattern corresponding to a frequency band is etched thereon.

[0062] Referring to Figures 1-14 In the embodiment, the bottom flexible film 3 is a single-sided copper-coated polyimide soft board, the polyimide film has a thickness of 50 μm, the copper coating has a thickness of 18 μm, the total area is 2.4 m x 6 m and is arranged in parallel with the top flexible film 1, and one side of the bottom flexible film 3 is entirely plated with metal.

[0063] Referring to Figures 1-14 In the embodiment, the lightweight framework 5 is made of a composite material based on a foaming filling process, and is used to achieve tensioning and shaping of the top flexible film 1, the radiation dipole vertical film 2 and the bottom flexible film 3 and control of interlayer shape and position accuracy.

[0064] Referring to Figures 1-14 In the embodiment, the back adhesive magic tape 6 is divided into a rough surface 8 and a pricked surface 9, the rough surface 8 is a surface with small soft fibers and round hairs, the pricked surface 9 is a surface with soft and hard hooked pricked hairs, and the back adhesive magic tape 6 is used to achieve repeatable three-dimensional disassembly between the top flexible film 1, the radiation dipole vertical film 2, the bottom flexible film 3 and the lightweight framework 5.

[0065] In the embodiment, the assembly truss 4 is used to complete assembly and fixation of the lightweight framework 5.

[0066] Referring to Figures 1-14 In the embodiment, the large-size flexible array antenna operates in a UHF frequency band, the total area of the radiation aperture is 2.4 m x 6 m, and the total area of the film is 44 m2. The large-size flexible array antenna solves the problems of difficulty in implementation of a high-precision gluing process of a large-size flexible substrate and inability to adjust a position after gluing, realizes repeatable three-dimensional disassembly of a large-size flexible film surface, facilitates transportation and erection of a large-aperture antenna, and provides a lightweight solution with high reliability for an aperture requirement of a low-frequency high-gain antenna.

[0067] Referring to Figures 1-14In the embodiment, first, high-precision circuit pattern etching is realized by using a flexible polyimide soft board, and then the primary and secondary surfaces of the magic tape are respectively glued to the flexible polyimide soft board and the lightweight skeleton 5; the lightweight skeleton 5 is used to realize the tensioning and shaping of the core radiation film, and the magic tape is used to realize the three-dimensional integration of the horizontal film and the vertical film. Compared with the traditional direct gluing scheme, the scheme solves the problems of difficulty in implementing high-precision gluing process of large-size flexible substrate and inability to adjust the position after gluing, realizes the repeatable three-dimensional disassembly of the large-size flexible film surface, and facilitates the transportation and erection of the large-aperture antenna. Based on the above scheme, a three-dimensional large-size flexible array antenna with an aperture area of 2.4m*6m and a total film area of 44m2 is completed. The invention solves the problem of three-dimensional integration of large-size flexible array antennas and provides a highly competitive lightweight solution for the design of high-gain large-size wideband array antennas in the UHF and lower frequency bands.

[0068] Reference Figures 1-14 In the embodiment, a use principle of the large-size flexible array antenna realized by using the magic tape for repeatable disassembly is as follows: First, the lightweight skeleton 5 based on the foaming filling process is used as the support core, and the side bonding surface 13, the top bonding surface 14 and the bottom bonding surface 15 are used to realize the detachable connection of the films and the lightweight skeleton 5 through the back-glue magic tape 6 (the rough surface 8 is attached to the top flexible film 1, the radiation dipole vertical film 2 and the bottom flexible film 3, and the thorn surface 9 is attached to the corresponding surface of the skeleton), which not only guarantees the stable connection by the primary and secondary surface attachment characteristics of the back-glue magic tape 6, but also realizes the repeatable disassembly by separating the primary and secondary surfaces, thereby solving the problem of difficult adjustment of the position in the traditional direct gluing scheme; Second, the top flexible film 1 (with periodic square patches 7) is installed on the top of the lightweight skeleton 5 in the horizontal direction to improve the impedance matching when the antenna is wide-angle scanned; the radiation dipole vertical film 2 is assembled on the side of the lightweight skeleton 5 in the vertical direction at equal intervals to realize stable electromagnetic wave radiation in the UHF frequency band through the etched dipole pattern; and the bottom flexible film 3 is parallel to the top flexible film 1 and is installed on the bottom and top of the lightweight skeleton 5, and the metal-plated surface realizes the total reflection of electromagnetic waves, and the three cooperate to form a three-dimensional structure, thereby breaking through the disadvantage of narrow working bandwidth of the traditional two-dimensional planar antenna; Finally, the assembled truss 4 is connected in series along the X-axis with a plurality of assembled lightweight skeletons 5 to complete the fixation and forming of the overall antenna, thereby ensuring the structural stability of the large-size (aperture 2.4m*6m) antenna, and the lightweight materials (polyimide film and foamed composite material) and the detachable design meet the requirements of the floating platform for lightweight antenna and easy transportation and erection, thereby guaranteeing the high-gain radiation performance in the UHF frequency band.

[0069] Advantages: 1. A low-frequency large-scale lightweight array antenna suitable for the field of wireless communication technology is proposed.

[0070] 2. A lightweight design scheme for realizing a large-size high-gain array antenna in the UHF frequency band based on flexible film materials (polyimide film) and lightweight skeletons 5 (composite materials based on foaming filling process) and other materials is proposed.

[0071] 3. A process implementation scheme for realizing large-size flexible film surface three-dimensional integration and repeated disassembly by using back adhesive magic tape 6 is proposed, which avoids the problems of difficult implementation of traditional large-size film surface direct gluing process and inability to adjust the position after gluing, and is conducive to the transportation and erection of large-aperture antennas.

[0072] The above only describes the preferred embodiments of the present application and is not used to limit the present application. For those skilled in the art, the present application can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A large-size flexible array antenna with repeatable disassembly and assembly by using magic tape, characterized in that: it comprises a top flexible film (1) used as a broadband angular impedance matching layer, a vertical dipole film (2) for radiation, a bottom flexible film (3) used as a metal reflecting floor, a plurality of assembly trusses (4) and a plurality of lightweight skeletons (5); the top flexible film (1), the vertical dipole film (2) for radiation and the bottom flexible film (3) are connected by a plurality of back adhesive magic tapes (6) at positions where they are attached to the plurality of lightweight skeletons (5); a plurality of assembly trusses (4) are connected in series to a plurality of lightweight skeletons (5); a plurality of square patches (7) are periodically etched on the outer side of the top flexible film (1); the vertical dipole film (2) for radiation is arranged at equal intervals in the vertical direction, and a single vertical dipole film (2) for radiation is etched with a dipole pattern corresponding to a frequency band; and one side of the bottom flexible film (3) is fully plated with metal. 2.The large-size flexible array antenna with repeatable disassembly and assembly by using magic tape according to claim 1, characterized in that: the back adhesive magic tape (6) has a rough surface (8) and a pricked surface (9), the rough surface (8) has a first adhesive surface (10) on the side away from the pricked surface (9), the pricked surface (9) has a second adhesive surface (11) on the side away from the rough surface (8), the second adhesive surface (11) of the back adhesive magic tape (6) is attached to the plurality of lightweight skeletons (5), and the first adhesive surface (10) of the back adhesive magic tape (6) is attached to the top flexible film (1), the vertical dipole film (2) for radiation or the bottom flexible film (3). 3.The large-size flexible array antenna with repeatable disassembly and assembly by using magic tape according to claim 1, characterized in that: a plurality of mechanical installation interfaces (12) are provided at both ends of the plurality of lightweight skeletons (5), and a plurality of assembly trusses (4) are connected in series in a plurality of mechanical installation interfaces (12) of the plurality of lightweight skeletons (5). 4.The large-size flexible array antenna with repeatable disassembly and assembly by using magic tape according to claim 1, characterized in that: one side of the lightweight skeleton (5) has a side adhesive surface (13), and the vertical dipole film (2) for radiation is connected to the side adhesive surface (13) by the back adhesive magic tape (6). 5.The large-size flexible array antenna with repeatable disassembly and assembly by using magic tape according to claim 2, characterized in that: the top of the lightweight skeleton (5) has a top adhesive surface (14), the bottom of the lightweight skeleton (5) has a bottom adhesive surface (15), and the top flexible film (1) and the bottom flexible film (3) are connected to the top adhesive surface (14) and the bottom adhesive surface (15) by the back adhesive magic tape (6) respectively. 6.The large-size flexible array antenna with repeatable disassembly and assembly by using magic tape according to claim 5, characterized in that: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ The back glue magic tape (6) is respectively pasted on the top layer flexible film (1), the radiation dipole vertical film (2) and the bottom layer flexible film (3) through the first glue surface (10) of the rough surface (8) of the back glue magic tape (6), and the prickle surface (9) of the back glue magic tape (6) is respectively pasted on the side bonding surface (13), the top bonding surface (14) and the bottom bonding surface (15) of the lightweight framework (5) through the second glue surface (11).

7. The large-size flexible array antenna capable of repeated disassembly and assembly by using magic tape according to claim 1, characterized in that: The lightweight framework (5) is composed of composite material based on foaming filling process, and the lightweight framework (5) is arranged between the top layer flexible film (1) and the bottom layer flexible film (3) along the YOZ plane.

8. The large-size flexible array antenna capable of repeated disassembly and assembly by using magic tape according to claim 1, characterized in that: The radiation dipole vertical film (2) is arranged on one side of the plurality of lightweight frameworks (5) along the YOZ plane.

9. The large-size flexible array antenna capable of repeated disassembly and assembly by using magic tape according to claim 1, characterized in that: The assembly truss (4) is connected in series on both ends of the plurality of lightweight frameworks (5) along the X axis.

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