Metamaterial antenna cabin

Abstract

The invention provides a metamaterial antenna cabin which comprises a skin, a wave absorbing and transmitting integrated material, an antenna assembly and a support. The skin and the support are fixedly connected together to form an accommodating space, and the wave-absorbing and wave-transmitting integrated material and the antenna assembly are arranged in the accommodating space; and the wave absorbing and transmitting integrated material is arranged between the skin and the antenna assembly and is used for filling a gap between the skin and the antenna assembly. According to the metamaterial antenna cabin disclosed by the invention, good wide-angle low-scattering characteristics can be realized on an azimuth angle plane and a pitch angle plane while conformal and broadband radiation performance is ensured. According to the metamaterial antenna cabin, the broadband and low-scattering characteristics are achieved at the same time, the contradiction between the electrical performance and the low-scattering performance is solved, and the metamaterial antenna cabin has excellent strength and quality performance; the excellent performance can be applied to the fields of tip aviation equipment, spaceflight, rail transit, national defense and military industry and the like.

Description

Technical Field

[0001] This invention relates to the field of metamaterials, and more specifically, to a metamaterial antenna compartment. Background Technology

[0002] With the development of modern wireless communication, radar, and low-scattering technologies, broadband low-scattering antennas are increasingly widely used. Developing antenna pods that simultaneously possess broadband and low-scattering characteristics has become a hot topic and a significant challenge. Antenna pods need to be adapted to the broadband and far-field radiation performance of the antenna, such as beamwidth and scanning angle; on the other hand, they must also consider the overall low-scattering performance of the equipment to ensure the safety of military equipment. Antenna pods are typically located within the radar wave detection range and are not obstructed by other structures. Scattering sources such as antenna components, specular reflections, and apex diffraction within the pod are amplified by the pod's cavity, resulting in strong scattering. Therefore, it is necessary to optimize antenna selection and feed design to achieve broadband transmission and far-field radiation performance, while simultaneously designing low-scattering antenna pods to achieve the broadband low-scattering performance of the antenna components.

[0003] Achieving wide bandwidth and low scattering characteristics is the core issue of antenna pods. On the other hand, radar detection technology is constantly evolving to counter low scattering techniques. Therefore, the requirements for antenna pods are becoming increasingly stringent: miniaturization, low profile, wide bandwidth, security, conformal design, and low scattering. However, due to the "weakest link" effect in balancing these performance characteristics, the research process for wide bandwidth and low scattering antenna pods faces more and more problems and challenges that urgently need to be solved. Summary of the Invention

[0004] This invention proposes a metamaterial antenna cabin with wide bandwidth and low scattering characteristics, which solves the technical problem of achieving good wide-angle low scattering characteristics while ensuring conformal and broadband radiation performance.

[0005] This invention provides a metamaterial antenna cabin, characterized in that it includes a skin, an integrated absorbing and transmitting material, an antenna assembly, and a support. The skin and the support are fixedly connected together to form a receiving space. The integrated absorbing and transmitting material and the antenna assembly are both disposed within the receiving space. The integrated absorbing and transmitting material is disposed between the skin and the antenna assembly and is used to fill the gap between the skin and the antenna assembly.

[0006] The beneficial effects of this invention are as follows:

[0007] The metamaterial antenna cabin described in this invention, while ensuring conformal and broadband radiation performance, also achieves excellent wide-angle low-scattering characteristics in both the azimuth and elevation planes. This metamaterial antenna cabin simultaneously achieves wide bandwidth and low-scattering characteristics, resolving the contradiction between electrical performance and low-scattering performance, and possesses excellent strength and mass performance. Its superior performance makes it applicable to advanced aerospace equipment, aerospace, rail transportation, and defense industries. The in-depth research and application of metamaterial technology presented in this invention has significant reference value for the development of metamaterials and low-scattering technology. Through the loading of various metamaterials and absorbing / transmitting materials, the metamaterial antenna cabin described in this invention is suitable for various high-requirement and complex equipment, simultaneously improving the contradiction between antenna electrical performance and equipment low-scattering performance, and optimizing the performance between the two. Attached Figure Description

[0008] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0009] Figure 1 This is a structural schematic diagram of a metamaterial antenna cabin according to an embodiment of the present invention.

[0010] Figure 2 It shows Figure 1 A schematic diagram of the radiation angular domain range of the metamaterial antenna cabin shown.

[0011] Figure 3 This is a schematic diagram of the low-scattering skin structure according to an embodiment of the present invention.

[0012] Figure 4 A schematic diagram illustrating the principle of decoupling within the metamaterial antenna compartment and reduction of radar cross-section described in this invention is shown.

[0013] Figure 5 A schematic diagram showing the scattering curves of the metamaterial antenna cabin described in this invention and a comparative scheme is presented. Detailed Implementation

[0014] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention are within the scope of protection of the present invention.

[0015] like Figure 1As shown, the metamaterial antenna cabin 100 of this embodiment includes a skin 10, an integrated absorbing and transmitting material 30, an antenna assembly 40, and a support 60. The metamaterial antenna cabin 100 is a broadband low-scattering metamaterial antenna cabin.

[0016] The skin 10 and the support 60 are fixedly connected together to form a receiving space, and the integrated absorbing and transmitting material 30 and the antenna assembly 40 are both disposed in the receiving space; the integrated absorbing and transmitting material 30 is disposed between the skin 10 and the antenna assembly 40 and is used to fill the gap between the skin 10 and the antenna assembly 40.

[0017] Furthermore, the metamaterial antenna compartment 100 also includes an radome 50 disposed within the containment space. The radome 50 covers the antenna assembly 40, and the skin 10 is a low-scattering skin. The integrated absorbing and transmitting material 30 is specifically disposed between the low-scattering skin 10 and the radome 50 and is used to fill the gap between the low-scattering skin 10 and the radome 50.

[0018] The integrated absorbing and transmitting material 30 includes absorbing honeycomb and transmitting honeycomb. The transmitting honeycomb is located in the radiation angular region of the antenna assembly 40, and the absorbing honeycomb is located in the non-radiation angular region of the antenna assembly 40. The absorbing honeycomb is obtained by impregnating the honeycomb with an absorbing material (including but not limited to carbon powder or graphite). The preparation method of the transmitting honeycomb can adopt existing technology, and this application does not make any particular limitation.

[0019] Figure 2 It shows Figure 1 This is a schematic diagram of the radiation angular domain range of the metamaterial antenna cabin 100 (i.e., the radiation angular domain range of the antenna assembly 40). Figure 2 As shown, the radiation angular domain ranges from -β to α, where α and β ≥ 0 and are not both 0 at the same time; specifically, the radiation angular domain range given in this example is from -70° to 70°.

[0020] Please refer to the following: Figure 3 The low-scattering skin 10 is in the shape of an inverted "V". The left and right sides of the low-scattering skin 10 are respectively bonded to two edge sealing ribs (not shown), which are detachably mounted on the support 40. The front and rear bottom ends of the low-scattering skin 10 are both mounted on the support 40 using fasteners. The fasteners include, but are not limited to, screws.

[0021] The edge sealing ribs described in this invention can be the edge sealing ribs in the prior art, and this application does not make any special limitation.

[0022] The low-scattering skin 10 includes a transparent region 12, an absorption and impedance gradient region 14, and an absorption and metallization region 16. The absorption and impedance gradient region 14 is located between the transparent region 12 and the absorption and metallization region 16.

[0023] In this embodiment of the invention, the wave-transmitting region 12, the wave-absorbing and impedance-gradient region 14, and the wave-absorbing and metallizing region 16 are integrally formed.

[0024] In this embodiment of the invention, the low-scattering skin 10 is in the shape of an inverted "V".

[0025] The low-scattering skin 10 undertakes functions such as strength, mass, low scattering, wave transmission, frequency selection, and impedance gradient within the metamaterial antenna cabin 100, serving as the core component of the metamaterial antenna cabin 100 system. The wave-transmitting region of the integrated absorbing and transmitting material 30 is installed in the radiating aperture of the antenna assembly 40, while the absorbing region is located in the non-radiating aperture of the antenna assembly 40. The integrated absorbing and transmitting material 30 also serves as a buffer, buffer, and support between the low-scattering skin 10 and the antenna assembly 40. The radome 50 primarily functions to provide beamforming, frequency selection, electromagnetic compatibility, decoupling, protection, and obstacle avoidance for the antenna assembly 40. The antenna assembly 40 can be a single antenna, multiple antennas, an array antenna, or a planar or conformal antenna. The support 60 can consist of an absorbing substrate, a reflector, a support beam, a mounting beam, actuators, and other components, and may also include active radio frequency devices, cables, and interfaces. The material of the absorbing substrate may be at least one of ferrite-containing glass fiber reinforced plastic, graphite-filled reinforced plastic, hybrid fiber reinforced plastic, conductive reinforced plastic and absorbing core material.

[0026] Specifically, the wave-transparent zone 12 includes at least one layer of wave-transparent prepreg that is stacked sequentially and integrally.

[0027] The microwave absorbing and impedance gradient region 14 includes at least one layer of microwave-transparent prepreg, at least one layer of impedance-gradient metamaterial, and one layer of microwave-absorbing coating, which are sequentially stacked and integrally disposed. Alternatively, the microwave absorbing and impedance gradient region 14 includes at least one layer of carbon fiber, at least one layer of impedance-gradient metamaterial, and one layer of microwave-absorbing coating, which are sequentially stacked and integrally disposed. Alternatively, the microwave absorbing and impedance gradient region 14 includes at least one layer of microwave-transparent prepreg, at least one layer of carbon fiber, at least one layer of impedance-gradient metamaterial, and one layer of microwave-absorbing coating, which are sequentially stacked and integrally disposed.

[0028] The microwave absorbing and metallized region 16 includes at least one layer of microwave-transparent prepreg, at least one layer of lightning protection membrane, and one layer of microwave-absorbing coating, which are sequentially and integrally stacked. Alternatively, the microwave absorbing and metallized region 16 includes at least one layer of carbon fiber, at least one layer of lightning protection membrane, and one layer of microwave-absorbing coating, which are sequentially and integrally stacked. Alternatively, the microwave absorbing and metallized region 16 includes at least one layer of microwave-transparent prepreg, at least one layer of carbon fiber, at least one layer of lightning protection membrane, and one layer of microwave-absorbing coating, which are sequentially and integrally stacked.

[0029] In this embodiment of the invention, the lightning protection film is a copper mesh or an aluminum mesh.

[0030] Preferably, the wave-transparent zone 12 specifically comprises ten layers of wave-transparent prepreg arranged in sequence as a single unit.

[0031] Preferably, the microwave absorption and impedance gradient region 14 specifically comprises nine layers of microwave-transparent prepreg, one layer of impedance gradient metamaterial, and one layer of microwave-absorbing coating, which are stacked sequentially as a single unit. Alternatively, it comprises nine layers of carbon fiber, one layer of impedance gradient metamaterial, and one layer of microwave-absorbing coating. The microwave-absorbing coating is sprayed onto the outermost layer of the microwave absorption and impedance gradient region 14 by spray painting.

[0032] Preferably, the microwave absorbing and metallized region 16 specifically comprises nine layers of microwave-transparent prepreg, one layer of lightning protection film, and one layer of microwave absorbing coating, which are stacked sequentially and integrally. Alternatively, it comprises nine layers of carbon fiber, one layer of lightning protection film, and one layer of microwave absorbing coating. The microwave absorbing coating is sprayed onto the outermost layer of the microwave absorbing and metallized region 16 by spray painting.

[0033] By way of non-limiting description, the impedance-gradient metamaterial comprises multiple metamaterial layers with progressively increasing impedance. The impedance of the multiple metamaterial layers increases sequentially from the direction of approach to the low-scattering skin. Each metamaterial layer is formed by curing toner and resin, including epoxy resin or polyurethane resin. The impedance of each metamaterial layer is determined by at least one of the thickness of the toner and the concentration of toner relative to the resin.

[0034] The microwave absorbing coating described in this invention can be any microwave absorbing coating in the prior art, and this application does not make any special limitation.

[0035] By way of non-limiting description, the microwave-transparent prepreg is a low-dielectric prepreg, preferably one or more of quartz fiber cloth / epoxy resin prepreg, glass fiber cloth / epoxy resin prepreg, and aramid fiber cloth / epoxy resin prepreg.

[0036] Specifically, in the wave-absorbing and impedance-gradient region 14, the bonding between the nine layers of wave-transparent prepreg and the one layer of impedance-gradient metamaterial typically uses adhesives and films of specific materials, so that the layers are cured and formed into a single unit through the adhesives and films. Alternatively, the bonding between the nine layers of carbon fiber and the one layer of impedance-gradient metamaterial typically uses adhesives and films of specific materials, so that the layers are cured and formed into a single unit through the adhesives and films.

[0037] Specifically, in the microwave absorbing and metallizing zone 16, the bonding between the nine layers of microwave-transparent prepreg and the one layer of lightning protection film typically uses adhesives and films of specific materials, so that the layers are cured and formed into a single unit through the adhesives and films. Alternatively, the bonding between the nine layers of carbon fiber and the one layer of lightning protection film typically uses adhesives and films of specific materials, so that the layers are cured and formed into a single unit through the adhesives and films.

[0038] Figure 4 A schematic diagram illustrating the principles of decoupling and radar cross-section reduction within a metamaterial antenna compartment is shown. Figure 4As shown, the impedance-gradient metamaterial comprises multiple metamaterial layers, each metamaterial layer being formed by curing toner and resin. The impedance of each metamaterial layer is determined by at least one of the thickness of the toner and the concentration of toner relative to the resin. The resin includes epoxy resin or polyurethane resin.

[0039] The left side of the wave-transmitting area of ​​the low-scattering skin is correspondingly provided with one of the antennas in the antenna assembly (i.e., Figure 4 Antenna system 1 shown), the right side of the wave-transmitting region of the low-scattering skin is correspondingly provided with another antenna in the antenna assembly (i.e., Figure 4 Antenna system 2 shown); the at least one layer of impedance-gradient metamaterial is disposed between the two antennas. The at least one layer of impedance-gradient metamaterial is used to remove the coupling between the two antennas and to reduce the radar cross-section of the metamaterial antenna cabin. The impedance of the multiple metamaterial layers in the impedance-gradient metamaterial decreases sequentially from the wave-transmitting region to the wave-absorbing and metallizing region.

[0040] Different impedance-gradient metamaterials with different numbers of layers are designed based on different types of antennas.

[0041] Figure 5 A schematic diagram comparing the scattering curves of the metamaterial antenna cabin 100 described in this invention with a comparative scheme is shown. The comparative scheme is: a conventional metamaterial antenna cabin based on metamaterial technology, the main body of which is an antenna layer and a metamaterial layer responsible for optimizing antenna radiation performance and suppressing scattering; the antenna is usually a planar antenna array, while the metamaterial generally adopts a periodic metallic microstructure, composed of M×N checkerboard-distributed metamaterial units; it is usually single in function, has limited radar cross-section reduction effect, and narrow bandwidth, and is not suitable for high-performance military, aerospace and other fields.

[0042] Depend on Figure 5 As can be seen, the metamaterial antenna pod 100 of this invention, while ensuring conformal and broadband radiation performance, also achieves excellent wide-angle low-scattering characteristics in both the azimuth and elevation planes. The metamaterial antenna pod 100 of this invention simultaneously achieves wide bandwidth and low-scattering characteristics, resolving the contradiction between electrical performance and low-scattering performance, and possesses excellent strength and mass performance. Its superior performance makes it applicable to advanced aerospace equipment, aerospace, rail transportation, and defense industries. The metamaterial antenna pod 100 of this invention provides significant reference value for the in-depth research and application of metamaterial technology and the development of metamaterials and low-scattering technology. Through the loading of various metamaterials and absorbing / transmitting materials, the metamaterial antenna pod 100 of this invention is suitable for various high-requirement and complex equipment, simultaneously improving the contradiction between antenna electrical performance and equipment low-scattering performance, as well as the performance optimization between the two. Existing comparative solutions cannot simultaneously achieve these performances in similar situations.

[0043] With the development of modern wireless communication, radar, and low-scattering technologies, the application of broadband low-scattering antennas is becoming increasingly widespread. Developing metamaterial antenna cabins that simultaneously possess broadband and low-scattering characteristics has become a current hot topic and a challenging problem. Metamaterial antenna cabins need to adapt to the broadband and far-field radiation performance of the antenna, such as beamwidth and scanning angle; on the other hand, they must also consider the overall low-scattering performance of the equipment to ensure the safety of military equipment. Metamaterial antenna cabins are typically located within the radar wave detection range and are not obstructed by other structures. Scattering sources such as antenna components, specular reflections, and apex diffraction within the metamaterial antenna cabin are amplified by the cabin's cavity, resulting in strong scattering. Therefore, it is necessary to optimize antenna selection and feed design to achieve broadband transmission and far-field radiation performance, while simultaneously designing low-scattering metamaterial antenna cabins to achieve broadband low-scattering performance for the antenna components.

[0044] Achieving wide bandwidth and low scattering characteristics is the core issue of metamaterial antenna radomes. For example, in military aviation, wide bandwidth and low scattering characteristics can improve the signal quality of communication and radar systems, while also reducing electromagnetic wave reflection and scattering, thus lowering the detectability of equipment. In civilian applications, radomes with wide bandwidth and low scattering characteristics can simultaneously improve communication quality and avoid interference from the surrounding environment. Currently, the technologies used in wide bandwidth and low scattering metamaterial antenna radomes mainly focus on two aspects: shape-based low-scattering technology and material-based low-scattering technology. By optimizing the shape, most radar waves incident on the metamaterial antenna radome can be deflected to angles undetectable by radar. By employing specific materials with unique electromagnetic wave absorption and transmission characteristics, radar wave scattering can be significantly reduced while maintaining radiation performance.

[0045] On the other hand, radar detection technology is constantly evolving to counter low-scattering techniques. Therefore, the requirements for metamaterial antenna cabins are becoming increasingly stringent: miniaturization, low profile, broadband, security, conformal design, and low scattering. However, due to the "weakest link" effect in balancing these performance characteristics, the research process for metamaterial antenna cabins with broadband and low-scattering properties faces numerous problems and challenges that urgently need to be addressed. These include, but are not limited to, the following:

[0046] 1. Complex Design: Achieving wide bandwidth and low scattering characteristics typically requires designing complex geometries and material combinations while simultaneously meeting the strength requirements of aerodynamic design and high-speed flight. 2. Antenna Electrical Performance and Electromagnetic Compatibility: A single metamaterial antenna cabin may contain multiple broadband antennas and antenna arrays operating at different frequency bands and with different plans. This necessitates that the metamaterial antenna cabin possess excellent electromagnetic compatibility, broadband transmission / filtering performance, and ensure broadband matching of each antenna component, as well as radiation performance such as scanning angle and beamwidth. 3. Low Scattering Characteristics: This includes not only suppressing the overall and local scattering cross-sections of the metamaterial antenna cabin but also reducing the scattering cross-sections of the metamaterial antenna cabin at different pitch angles, scanning angles, and target frequency bands.

[0047] The present invention aims to propose a metamaterial antenna cabin 100 with wide bandwidth and low scattering characteristics, which can achieve good wide-angle low scattering characteristics in both the azimuth and elevation planes while ensuring conformal and broadband radiation performance.

[0048] In existing technologies, methods for reducing the radar cross-section of a target mainly include shape optimization, absorbing / transmitting materials, active / passive cancellation technology, and metamaterials. Among these, metamaterials and absorbing / transmitting materials are widely used to achieve wideband and low scattering characteristics of antennas and metamaterial antenna cabins.

[0049] Absorbing materials can effectively reduce the reflection and scattering of electromagnetic waves. In the military and aerospace fields, they can significantly reduce radar cross-section, improve the low-scattering performance of equipment, and effectively enhance survivability. However, their disadvantage lies in the adverse effect on the radiation of their own antenna system. Therefore, combining absorbing and transmitting materials to avoid the necessary radiation aperture of the antenna system is currently an effective solution.

[0050] In terms of radiation, metamaterials enable precise beamforming, allowing antennas to focus signals in a specific direction, thereby improving the performance of communication and radar systems. Metamaterials also allow antennas to be tuned at different frequencies to adapt to different communication standards and frequency bands. Furthermore, metamaterials possess excellent electromagnetic compatibility, significantly reducing coupling between identical or different antennas, such as through the design of arrays with strong mutual coupling effects using artificial electromagnetic metamaterial modulation techniques.

[0051] In the field of electromagnetic low-scattering, frequency-selective surfaces constructed using metamaterials can enable communication systems to incorporate both absorption and transmission capabilities. Broadband metamaterials can address the technical challenges of low scattering within the antenna band, low scattering outside the band, and low scattering in the transition band by reducing the number of antenna apertures and optimizing the scattering performance within and between antenna bands. For example, polarization-converting metasurface technology can be used to precisely control the polarization of incident waves, transforming electromagnetic waves into a state that is difficult to detect, thereby reducing radar cross-section and improving low-scattering performance.

[0052] In summary, through in-depth research on metamaterials, the development of radiation-scattering integrated metamaterials can simultaneously optimize antenna radiation performance and overall low scattering performance of equipment, solving the problem of the difficulty in achieving both.

[0053] The metamaterial antenna compartment 100 proposed in this invention can solve the technical challenge of compatible control of wideband electrical performance and low scattering performance in special functional antenna systems. It will achieve a balanced design of electrical performance and low scattering performance of special functional antennas. The product will be applied in cutting-edge aerospace equipment. Its technology can be widely used in aerospace, rail transportation and defense industries. It is of great significance to the development of metamaterials and low scattering technology, and has significant technical value and broad market prospects.

[0054] The most challenging aspect of conceiving the metamaterial antenna cabin 100 of this invention is ensuring, or even optimizing, the radiation performance of the antenna components, guaranteeing the standing wave bandwidth performance of the antenna during large-angle scanning, while simultaneously improving the low-scattering performance of the overall equipment. In particular, it is crucial to suppress scattering sources directly or indirectly caused by the wave-transparent area within the metamaterial antenna cabin. This necessitates optimizing and balancing the electrical performance of the antenna system and the overall low-scattering performance. Simply ensuring or improving the antenna's electrical performance would increase the number of scattering sources and degrade the low-scattering performance of the metamaterial antenna cabin. Furthermore, during radar detection, different scattering sources correspond to different frequencies, elevation planes, and azimuth planes. Optimizing the metamaterial antenna cabin solution involves continuously balancing the low-scattering performance of each frequency and scanning plane while ensuring good antenna radiation, selecting the optimal solution from different options.

[0055] The most remarkable aspect of the metamaterial antenna compartment 100 described in this invention is that the integrated structure, which combines various functional metamaterials and wave-absorbing / transmitting materials, can effectively guarantee antenna performance and ensure low scattering performance.

[0056] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A metamaterial antenna cabin, characterized in that, The device includes a skin, an integrated absorbing and transmitting material, an antenna assembly, and a support. The skin and the support are fixedly connected together to form a receiving space. The integrated absorbing and transmitting material and the antenna assembly are both disposed within the receiving space. The integrated absorbing and transmitting material is disposed between the skin and the antenna assembly and is used to fill the gap between the skin and the antenna assembly.

2. The metamaterial antenna cabin according to claim 1, characterized in that, It also includes an antenna radome disposed within the containment space, the antenna radome covering the antenna assembly, and the skin being a low-scattering skin; the integrated absorbing and transmitting material is specifically disposed between the low-scattering skin and the antenna radome and is used to fill the gap between the low-scattering skin and the antenna radome.

3. The metamaterial antenna cabin according to claim 2, characterized in that, The integrated absorbing and transmitting material includes absorbing honeycomb and transmitting honeycomb, wherein the transmitting honeycomb is located in the radiation angular domain of the antenna assembly, and the absorbing honeycomb is located in the non-radiation angular domain of the antenna assembly.

4. The metamaterial antenna cabin according to claim 2, characterized in that, The low-scattering skin includes a wave-transmitting region, a wave-absorbing and impedance-gradient region, and a wave-absorbing and metallized region; the wave-absorbing and impedance-gradient region is located between the wave-transmitting region and the wave-absorbing and metallized region. The wave-transparent zone includes at least one layer of wave-transparent prepreg that is stacked sequentially and integrally arranged; The microwave absorption and impedance gradient region includes at least one layer of microwave-transparent prepreg, at least one layer of impedance gradient metamaterial, and one layer of microwave-absorbing coating, which are stacked in sequence and integrally formed. Alternatively, it may include at least one layer of carbon fiber, at least one layer of impedance gradient metamaterial, and one layer of microwave-absorbing coating. The microwave absorbing and metallized area includes at least one layer of microwave-transparent prepreg, at least one layer of lightning protection film, and one layer of microwave-absorbing coating, which are stacked in sequence and integrally formed. Alternatively, it may include at least one layer of carbon fiber, at least one layer of lightning protection film, and one layer of microwave-absorbing coating.

5. The metamaterial antenna cabin according to claim 4, characterized in that, The lightning protection membrane is made of copper mesh or aluminum mesh.

6. The metamaterial antenna cabin according to claim 4, characterized in that, The wave-transparent zone specifically comprises ten layers of wave-transparent prepreg arranged in sequence as a single unit; The microwave absorption and impedance gradient region specifically includes nine layers of microwave-transparent prepreg, one layer of impedance gradient metamaterial, and one layer of microwave-absorbing coating, which are stacked in sequence as a whole; or nine layers of carbon fiber, one layer of impedance gradient metamaterial, and one layer of microwave-absorbing coating. The microwave absorbing and metallized area specifically includes nine layers of microwave-transparent prepreg, one layer of lightning protection film, and one layer of microwave absorbing coating, which are stacked in sequence as a whole, or nine layers of carbon fiber, one layer of lightning protection film, and one layer of microwave absorbing coating.

7. The metamaterial antenna cabin according to claim 4, characterized in that, The impedance-gradient metamaterial comprises multiple metamaterial layers; One antenna in the antenna assembly is correspondingly arranged on the left side of the transparent area, and another antenna in the antenna assembly is correspondingly arranged on the right side of the transparent area. The at least one layer of impedance-gradient metamaterial is disposed between the two antennas. The at least one layer of impedance-gradient metamaterial is used to remove the coupling between the two antennas and to reduce the radar cross-section of the metamaterial antenna cabin. The impedance of the multiple metamaterial layers in each impedance-gradient metamaterial decreases sequentially from the wave-transmitting region to the wave-absorbing and metallizing region.

8. The metamaterial antenna cabin according to claim 7, characterized in that, Each metamaterial layer is formed by curing toner and resin, and the impedance of each metamaterial layer is determined by at least one of the thickness of the toner and the concentration of the toner relative to the resin; the resin includes epoxy resin or polyurethane resin.

9. The metamaterial antenna cabin according to claim 2, characterized in that, The low-scattering skin is in the shape of an inverted "V".

10. The metamaterial antenna cabin according to claim 2, characterized in that, The left and right sides of the low-scattering skin are respectively bonded to two edge sealing ribs, and the two edge sealing ribs are detachably set on the support; the front and rear bottoms of the low-scattering skin are both set on the support by fasteners.

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