Antenna housing and antenna assembly

Abstract

The utility model provides an antenna housing and an antenna assembly, the antenna housing comprises a first base material layer, a support layer and a second base material layer which are stacked, and the thickness of the first base material layer is different from that of the second base material layer; the supporting layer is provided with a plurality of hollowed-out areas, and the hollowed-out areas face the first base material layer and the second base material layer respectively so as to form a path allowing electromagnetic waves to be transmitted from the first base material layer to the second base material layer. The antenna housing can meet the requirement for large-angle wave transmission.

Description

Technical Field

[0001] This utility model relates to the field of antenna technology, and in particular to an antenna radome and an antenna assembly. Background Technology

[0002] In the field of radome technology, radome design schemes are mainly divided into two categories: dome-shaped radomes and multi-layered planar radomes. As a crucial component for electromagnetic wave transmission, radomes have extremely stringent performance requirements, needing to balance high transmittance, wide-angle coverage, broad bandwidth response, and sufficient structural strength. However, these high-performance specifications make the design and manufacturing process of radomes exceptionally complex and costly, limiting their widespread adoption in consumer electronics.

[0003] In recent years, millimeter-wave radar technology has been widely used in various fields due to its advantages in privacy protection, broadband communication, and small size and power consumption. However, the short wavelength characteristics of millimeter waves make their wave transmission capability highly dependent on the selection and design of the radome material. In traditional solutions, the radome significantly obstructs short-wavelength, large-angle millimeter waves and has low wave transmission, affecting antenna performance.

[0004] Therefore, how to design an antenna radome that can meet the requirements of wide-angle wave transmission has become a key issue in current technological development. Utility Model Content

[0005] This application provides an antenna radome and antenna assembly that can meet the requirements for wide-angle wave transmission.

[0006] This application provides an antenna radome, including a first substrate layer, a support layer and a second substrate layer stacked together, wherein the first substrate layer and the second substrate layer have different thicknesses.

[0007] The support layer has multiple hollow areas, which face the first substrate layer and the second substrate layer respectively, to form a path that allows the electromagnetic wave to be transmitted from the first substrate layer to the second substrate layer.

[0008] In some embodiments, the support layer is a honeycomb structure, which includes a plurality of honeycomb cells arranged sequentially, with each honeycomb cell forming the hollow area.

[0009] In some embodiments, the wall thickness of the cellular cell is 0.3 mm to 0.7 mm.

[0010] In some embodiments, the first substrate layer and the second substrate layer have the same refractive index.

[0011] In some embodiments, the relative permittivity of the first substrate layer and the second substrate layer is less than 4; the loss tangent of the first substrate layer and the second substrate layer is less than 0.01.

[0012] In some embodiments, the support layer is integrally formed with at least one of the first substrate layer and the second substrate layer.

[0013] In some embodiments, the thickness of the first substrate layer is greater than the thickness of the second substrate layer.

[0014] In some embodiments, the thickness of the first substrate layer is 0.3 mm to 0.7 mm, and the thickness of the second substrate layer is 0.2 mm to 0.4 mm.

[0015] In some embodiments, the outer surface of the second substrate layer is provided with a locally thickened region for enhancing structural strength.

[0016] This application also provides an antenna assembly, including:

[0017] Antenna radome, wherein the antenna radome is the aforementioned antenna radome;

[0018] An antenna structure is disposed on one side of the first substrate layer near the radome.

[0019] The radome and antenna assembly provided in this application include a first substrate layer, a support layer, and a second substrate layer stacked together, with the first and second substrate layers having different thicknesses. The support layer has multiple hollow areas facing the first and second substrate layers respectively, forming a path that allows electromagnetic waves to propagate from the first substrate layer to the second substrate layer. By optimizing the stacked structure design, and utilizing the phase superposition effect of two interface reflection waves and one transmitted wave generated by the thickness difference between the first and second substrate layers, the transmittance of electromagnetic waves incident at large angles is significantly improved, meeting the requirements for large-angle wave transmission. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 This is a schematic diagram of the first structure of the radome provided in an embodiment of this application.

[0022] Figure 2 for Figure 1 An explosion diagram.

[0023] Figure 3 This is a schematic diagram of the support layer provided in an embodiment of this application.

[0024] Figure 4 This is a schematic diagram of a second structure of the radome provided in an embodiment of this application.

[0025] Figure 5 This is a schematic diagram of a third structure of the radome provided in an embodiment of this application.

[0026] Figure 6 This is a schematic diagram of a first structure of an antenna assembly provided in an embodiment of this application.

[0027] Figure 7 This is a schematic diagram of a second structure of the antenna assembly provided in an embodiment of this application.

[0028] Figure 8 This is a schematic diagram of a third structure of the antenna assembly provided in an embodiment of this application.

[0029] Figure 9 The antenna pattern of the antenna assembly provided in the embodiments of this application. Detailed Implementation

[0030] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0031] This application provides an antenna radome and antenna assembly that can meet the requirements of wide-angle wave transmission. The following is a detailed description in conjunction with the accompanying drawings.

[0032] Please see Figure 1 as well as Figure 2 , Figure 1 This is a schematic diagram of a first structure of the radome provided in an embodiment of this application. Figure 2 for Figure 1 An explosion diagram.

[0033] This application provides an antenna radome 100, which is a structure that protects the antenna structure 200 from the influence of the external environment. At the same time, it is necessary to ensure the effective transmission of electromagnetic waves within the normal operating frequency range of the antenna structure 200, reduce the loss and reflection of electromagnetic waves during transmission, and play a key role in protecting and optimizing the electrical performance of the antenna structure 200.

[0034] The radome 100 includes a first substrate layer 10, a support layer 30, and a second substrate layer 20 stacked together, with the first substrate layer 10 and the second substrate layer 20 having different thicknesses. The first substrate layer 10 and the second substrate layer 20 serve as the basic structural layers of the radome 100, providing necessary mechanical support and participating in the electromagnetic wave transmission process. The support layer 30 serves to support and maintain the stability of the stacked structure.

[0035] Please see Figure 3 , Figure 3 This is a schematic diagram of the support layer provided in an embodiment of this application.

[0036] The support layer 30 has multiple open areas 31, which face the first substrate layer 10 and the second substrate layer 20 respectively, to form a path that allows electromagnetic waves to propagate from the first substrate layer 10 to the second substrate layer 20. It is worth noting that the open areas 31 refer to specific openings on the support layer 30. The presence of these areas alters the propagation environment of electromagnetic waves in the laminated structure, enabling electromagnetic waves to propagate from the first substrate layer 10 to the second substrate layer 20 along a specific path, reducing unnecessary reflections and losses.

[0037] When an electromagnetic wave propagates from one medium to another, reflection occurs at the interface between the two media. The reflected electromagnetic wave is called the interface reflected wave.

[0038] In this embodiment, given the difference in thickness between the first substrate layer 10 and the second substrate layer 20, and their alternating arrangement, electromagnetic waves are reflected from both surfaces of the first substrate layer 10, forming a first interface reflected wave. This first interface reflected wave undergoes constructive interference with the refracted wave. Simultaneously, electromagnetic waves are also reflected from the two surfaces corresponding to the hollowed-out area 31 of the support layer 30 (the inner surface of the first substrate layer 10 and the inner surface of the second substrate layer 20), forming a second interface reflected wave. This second interface reflected wave also undergoes constructive interference with the refracted wave. By optimizing the layered structure design and utilizing the phase superposition effect of the two interface reflected waves and the first transmitted wave generated by the thickness difference between the first substrate layer 10 and the second substrate layer 20, the transmittance of electromagnetic waves incident at large angles is significantly improved, meeting the requirements for large-angle wave transmission.

[0039] In some embodiments, please continue reading Figure 3 The support layer 30 has a honeycomb structure, which is a spatial structure with a special topological shape, composed of a large number of regularly arranged polygonal units (i.e., honeycomb units 32 in this application). This structure has advantages such as light weight, high strength, and good stability.

[0040] The honeycomb structure includes multiple honeycomb units 32, which are the basic units that make up the honeycomb structure. Multiple honeycomb units 32 are arranged in sequence, and each honeycomb unit 32 forms a hollow area 31, which provides a specific spatial environment for the propagation and reflection of electromagnetic waves.

[0041] The thickness of the support layer 30 can be from 0.6 mm to 1 mm, and the wall thickness of the honeycomb unit 32 can be from 0.3 mm to 0.7 mm, for example, 0.5 mm. When the wall thickness is in the range of 0.3 mm to 0.7 mm, a specific phase relationship can be formed between the reflected wave and the transmitted wave, thereby producing a beneficial interference effect. For example, at a specific incident angle, this suitable wall thickness design can cause constructive interference between the reflected wave and the transmitted wave, enhancing the electromagnetic wave energy in a specific direction, and thus improving the transmittance of the electromagnetic wave.

[0042] The first substrate layer 10 and the second substrate layer 20 have the same refractive index. From the basic principle of electromagnetic wave propagation, when an electromagnetic wave enters a medium with a refractive index of n1 and then a medium with a refractive index of n2, its propagation direction will change according to Snell's law. For example, when an electromagnetic wave enters the first substrate layer 10 from air, it will be refracted because the refractive index of air is different from that of the first substrate layer 10; similarly, when an electromagnetic wave enters the air from the second substrate layer 20, it will also be refracted due to the difference in refractive index. In this application, the refractive indices of the first substrate layer 10 and the second substrate layer 20 are strictly set to the same value. This design completely eliminates the problem of uncontrollable propagation paths caused by differences in refractive index, ensuring that the incident wave propagates in a stable direction when passing through the two substrate layers.

[0043] The relative permittivity of both the first substrate layer 10 and the second substrate layer 20 is less than 4. The relative permittivity is a physical quantity that measures the degree of polarization of a medium under the influence of an electric field. It reflects the medium's ability to store energy from the electric field. In the field of electromagnetic wave transmission, the relative permittivity of the substrate layer affects the propagation speed, wavelength, and electromagnetic field distribution of electromagnetic waves within it. A smaller relative permittivity means that the propagation speed of electromagnetic waves in the substrate layer is relatively fast, and the wavelength variation is smaller, which is beneficial for reducing loss and dispersion during propagation. In this application, the relative permittivity of both the first substrate layer 10 and the second substrate layer 20 is less than 4, a characteristic that provides favorable conditions for efficient electromagnetic wave transmission.

[0044] The loss tangent values ​​of both the first substrate layer 10 and the second substrate layer 20 are less than 0.01. The loss tangent is a parameter that measures the energy loss of a dielectric material under an alternating electric field. It reflects the dielectric's ability to convert electrical energy into heat energy. During electromagnetic wave transmission, a smaller loss tangent value in the substrate layer means less energy is lost due to dielectric loss during propagation, thus ensuring higher intensity and efficiency of electromagnetic wave transmission. In this application, the loss tangent values ​​of both the first substrate layer 10 and the second substrate layer 20 are less than 0.01, indicating that these two substrate layers have low electromagnetic wave transmission loss and can effectively improve the transmission quality of electromagnetic waves.

[0045] The first substrate layer 10 and the second substrate layer 20 can be made of the same material, and both the first substrate layer 10 and the second substrate layer 20 can be made of PC (Polycarbonate). When the first substrate layer 10 and the second substrate layer 20 are made of the same material, the phase superposition of the interface reflected waves can be adjusted by different thickness designs, thereby optimizing the large-angle wave transmission performance.

[0046] Please see Figure 4 , Figure 4 This is a schematic diagram of a second structure of the radome provided in an embodiment of this application. The support layer 30 is integrally formed with at least one of the first substrate layer 10 and the second substrate layer 20.

[0047] From a manufacturing process perspective, traditionally, the support layer 30 and the substrate layer may be manufactured separately and then assembled using methods such as gluing or welding. However, this assembly method has many drawbacks. For example, additional errors may be introduced during assembly, resulting in low alignment accuracy between layers, which in turn affects the transmission performance of electromagnetic waves in the structure. Simultaneously, gaps or discontinuities may exist at the assembly interfaces, causing scattering and reflection of electromagnetic waves during transmission, increasing transmission loss. However, using a one-piece molding process can avoid these problems. In the one-piece molding process, the support layer 30 and at least one of the first substrate layer 10 and the second substrate layer 20 are formed into a single integral structure under specific conditions such as high temperature and high pressure, through the constraint of the mold and the flow and solidification of the material. In this integral structure, there are no obvious boundaries between the layers, and the materials are tightly bonded, greatly improving the overall strength and stability of the structure.

[0048] For example, the support layer 30 and the first substrate layer 10 are integrally formed by injection molding, and the second substrate layer 20 is fixed to the support layer 30 by ultrasonic welding or bonding, which has the advantages of being simple and easy to implement and having low process cost.

[0049] Injection molding is a mature and efficient polymer material processing technology widely used in industrial manufacturing. The support layer 30 and the first substrate layer 10 form a tightly bonded, seamless, and defect-free integrated structure. This integrated molding method not only ensures the connection strength between the two but also gives the overall structure high dimensional accuracy and shape stability.

[0050] For the connection between the second substrate layer 20 and the support layer 30, this application provides two flexible process options: ultrasonic welding and bonding. Ultrasonic welding utilizes high-frequency vibration energy to generate intense friction between the contact surface materials, thereby generating heat that locally melts and fuses the materials. This welding method has advantages such as fast welding speed, high joint strength, and no need for additional materials. The bonding process uses an adhesive with specific electromagnetic properties and adhesive strength to bond the second substrate layer 20 and the support layer 30 together. By precisely controlling the coating thickness and uniformity of the adhesive, a stable and reliable connection between the second substrate layer 20 and the support layer 30 can be achieved.

[0051] In some embodiments, please refer to Figure 5 , Figure 5 This is a schematic diagram of a third structure of the radome provided in an embodiment of this application. When two or more coherent waves are superimposed at a point in space, the difference in path difference will produce an enhancement or reduction effect. Under other conditions for interference (such as coherence), if the path difference is equal to an integer multiple of the wavelength, constructive interference will occur.

[0052] The first substrate layer 10, the support layer 30, and the second substrate layer 20 are parallel to each other. This electromagnetic wave is a millimeter wave, and its wavelength range is usually in the millimeter wave frequency band. The specific range may vary depending on different applications and standards, but generally speaking, the wavelength range of millimeter waves is roughly between 1 mm and 10 mm, corresponding to a frequency range of approximately 30 GHz to 300 GHz.

[0053] The thickness of the first substrate layer 10 is greater than the thickness of the second substrate layer 20. The first substrate layer 10 enables the radome 100 to handle a wider range of incident angles, improving the coverage and flexibility of the antenna system. By increasing the thickness of the first substrate layer 10, the thin-film interference conditions can be better met, which is crucial for achieving effective transmission of large-angle beams. Thin-film interference conditions are generally related to the material thickness, refractive index, and wavelength of the incident electromagnetic wave. By optimizing the thickness of the first substrate layer 10, it can be ensured that the electromagnetic wave maintains high transmittance and small phase change when passing through the radome 100. The second substrate layer 20 can reduce interference between the reflected wave and the incident wave. Reduced interference means that more electromagnetic wave energy can pass through the radome 100 instead of being reflected or absorbed, thereby improving the overall transmission efficiency.

[0054] With respect to the first substrate layer 10, electromagnetic waves are refracted on both the outer and inner surfaces of the first substrate layer 10. A portion of the electromagnetic waves are reflected twice on the inner and outer surfaces of the first substrate layer 10 and then refracted out from the inner surface.

[0055] When an electromagnetic wave is refracted on the outer surface of the first substrate layer 10, the incident angle is θ, the refraction angle is α, and the reflection angle on the inner surface is α.

[0056] The path difference between the refracted wave and the reflected wave is (2d1) / cosα. The refracted wave and the reflected wave will exhibit constructive interference, which satisfies the following equation (1):

[0057]

[0058] Where m represents the interference order, m = 0, ±1, ±2, ...; λ0 is the wavelength of the electromagnetic wave in vacuum, d1 is the thickness of the first substrate layer 10, and α is the reflection angle.

[0059] As described above, the thickness of the first substrate layer 10 is 0.3 mm to 0.7 mm, for example, 0.5 mm.

[0060] With respect to the support layer 30, electromagnetic waves are refracted at the interface between the hollow area 31 of the support layer 30 and the first substrate layer 10 and the second substrate layer 20. After being reflected twice on the inner surfaces of the first substrate layer 10 and the second substrate layer 20, a portion of the electromagnetic waves are refracted and emitted from the inner surface of the second substrate layer 20.

[0061] When an electromagnetic wave is refracted on the outer surface of the first substrate layer 10, the incident angle is α and the refraction angle is θ. The reflection angle on the inner surface of the second substrate layer 20 is θ.

[0062] The path difference between the refracted wave and the reflected wave is (2d²) / cosθ. The refracted wave and the reflected wave will exhibit constructive interference, which satisfies the following equation (2):

[0063]

[0064] Where m represents the interference order, m = 0, ±1, ±2, ...; λ0 is the wavelength of the electromagnetic wave in vacuum, d2 represents the thickness of the support layer 30, and θ is the reflection angle.

[0065] Based on the above, the thickness of the support layer 30 is 0.6 mm to 1 mm, for example, 0.8 mm.

[0066] With respect to the second substrate layer 20, electromagnetic waves are refracted on both the outer and inner surfaces of the second substrate layer 20. A portion of the electromagnetic waves are reflected twice on the outer and inner surfaces of the second substrate layer 20 before being refracted out from the outer surface.

[0067] When an electromagnetic wave is refracted at the outer surface of the second substrate layer 20, the incident angle is θ, the refraction angle is α, and the reflection angle at the inner surface is α. The path difference between the refracted wave and the reflected wave is (2d³) / cosα. At this time, the phase difference between the refracted wave and the reflected wave is small, resulting in the reflected wave being almost in phase or slightly out of phase with the refracted wave. In this case, the superposition effect of the reflected wave is significantly weakened, thereby reducing the total reflected energy, which satisfies the following equation (3):

[0068]

[0069] Where λ0 is the wavelength of the electromagnetic wave in a vacuum, d3 represents the thickness of the second substrate layer 20, and α is the reflection angle.

[0070] By controlling the above interference conditions, the superposition effect of reflected and refracted waves is effectively suppressed, thereby reducing the reflection on the surface of the radome 100, lowering the voltage standing wave ratio (VSWR), improving the transmission efficiency of electromagnetic waves, and avoiding signal distortion or energy loss caused by the interference of reflected and incident waves.

[0071] As described above, the thickness of the second substrate layer 20 is 0.2 mm to 0.4 mm, for example, 0.3 mm.

[0072] In equations (1) to (3) above, inequality relations are used to describe the range, so that electromagnetic waves of multiple wavelengths can satisfy the interference or reflection suppression conditions.

[0073] In some embodiments, the radome 100 further includes a hydrophobic coating disposed on the side of the second substrate layer 20 away from the support layer 30, and the hydrophobic coating has a good anti-fouling effect.

[0074] In some embodiments, the outer surface of the second substrate layer 20 is provided with locally thickened regions to enhance structural strength. These locally thickened regions can effectively improve the deformation resistance and damage resistance of the radome 100. By providing thickened structures in stress concentration areas, stress can be dispersed to a larger area, reducing the risk of structural damage caused by excessive local stress.

[0075] Appropriate local thickening can also fine-tune the propagation characteristics of electromagnetic waves. By changing the shape, size, and position of the thickened area, the reflection, refraction, and transmission behavior of electromagnetic waves on the surface of the radome 100 can be affected, thereby optimizing the electromagnetic performance of the radome 100 and improving the antenna's radiation efficiency and receiving sensitivity.

[0076] The thickness of the thickened area is 1.2 to 1.5 times the thickness of the substrate layer. During the manufacturing process, local thickening can be achieved through mold design. In molding processes such as injection molding or calendering, the material thickness in the corresponding area is increased, thereby forming a locally thickened structure.

[0077] Please see Figure 6 , Figure 7 as well as Figure 8 , Figure 6 This is a schematic diagram of a first structure of the antenna assembly provided in an embodiment of this application. Figure 7 This is a schematic diagram of a second structure of the antenna assembly provided in an embodiment of this application. Figure 8 This is a schematic diagram of a third structure of the antenna assembly provided in an embodiment of this application. An embodiment of this application provides an antenna assembly 1, which includes an radome 100 and an antenna structure 200, the antenna structure 200 being disposed on one side near the first substrate layer 10 of the radome 100.

[0078] This antenna assembly 1 can be used to receive and transmit millimeter waves, and can be widely used in electronic devices such as televisions. Please continue reading. Figure 8 Especially in environments with small antenna windows, it provides effective antenna protection and signal transmission.

[0079] Please continue reading. Figure 9 , Figure 9 This is an antenna pattern of an antenna assembly provided in an embodiment of this application. The antenna assembly 1 of this application can achieve effective transmission of millimeter-wave radar beams within a large azimuth angle range of ±60° at certain specific frequencies (e.g., in the case of receiving and transmitting millimeter waves). This advantage allows the television set to receive millimeter-wave signals without being limited by the antenna installation angle, enabling it to receive signals from a wider range of directions and improving the stability and reliability of signal reception.

[0080] For example, in complex indoor environments, the position of the television set may be affected by factors such as furniture placement, preventing the antenna from directly pointing towards the signal source. However, the wide-angle wave transmission capability of the antenna assembly 1 in this application ensures that the television set can still receive a strong signal, guaranteeing high-speed signal transmission. In televisions, millimeter-wave radar beams can also be used to achieve more precise gesture and motion recognition interaction functions. Users can control the television's power, volume adjustment, channel switching, and other operations with simple gestures, without needing a remote control.

[0081] The meticulous design of each layer of the radome 100 and the rational arrangement of the antenna structure 200 together alter the reflection, refraction, and transmission behavior of electromagnetic waves on the surface of the radome 100, thereby optimizing the antenna's radiation pattern and gain. The optimized radiation pattern allows the antenna to have stronger radiation intensity in a specific direction, reducing energy leakage to other directions and improving the antenna's directivity. Simultaneously, the increased gain means the antenna can more effectively receive and transmit electromagnetic waves, enhancing signal strength and quality. For example, when receiving long-distance millimeter-wave signals, higher gain allows the television to receive weaker signals, expanding the signal reception range.

[0082] In the radome 100 and antenna assembly 1 provided in this application embodiment, the radome 100 includes a first substrate layer 10, a support layer 30, and a second substrate layer 20 stacked together. The first substrate layer 10 and the second substrate layer 20 have different thicknesses. The support layer 30 has multiple hollow areas 31, which face the first substrate layer 10 and the second substrate layer 20 respectively, to form a path that allows electromagnetic waves to be transmitted from the first substrate layer 10 to the second substrate layer 20. By optimizing the stacked structure design, the phase superposition effect of two interface reflection waves and one transmitted wave generated by the thickness difference between the first substrate layer 10 and the second substrate layer 20 is utilized to significantly improve the transmittance of electromagnetic waves incident at large angles, thus meeting the requirements for large-angle wave transmission.

[0083] In the above embodiments, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions in other embodiments.

[0084] In the description of this application, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more features.

[0085] The radome and antenna assembly provided in the embodiments of this application have been described in detail above. Specific examples have been used to illustrate the principles and implementation methods of this application. The descriptions of the embodiments above are only for the purpose of helping to understand this application. Furthermore, those skilled in the art will recognize that, based on the ideas of this application, there will be changes in the specific implementation methods and application scope. Therefore, the content of this specification should not be construed as a limitation of this application.

Claims

1. An antenna radome, characterized in that, It includes a first substrate layer, a support layer and a second substrate layer stacked together, wherein the first substrate layer and the second substrate layer have different thicknesses; The support layer has multiple hollow areas, which face the first substrate layer and the second substrate layer respectively, to form a path that allows electromagnetic waves to be transmitted from the first substrate layer to the second substrate layer.

2. The radome according to claim 1, characterized in that, The support layer has a honeycomb structure, which includes multiple honeycomb units arranged sequentially, with each honeycomb unit forming the hollow area.

3. The radome according to claim 2, characterized in that, The wall thickness of the cellular unit is 0.3 mm to 0.7 mm.

4. The radome according to any one of claims 1 to 3, characterized in that, The first substrate layer and the second substrate layer have the same refractive index.

5. The radome according to any one of claims 1 to 3, characterized in that, The relative permittivity of the first substrate layer and the second substrate layer is less than 4; the loss tangent of the first substrate layer and the second substrate layer is less than 0.

01.

6. The radome according to any one of claims 1 to 3, characterized in that, The support layer is integrally formed with at least one of the first substrate layer and the second substrate layer.

7. The radome according to any one of claims 1 to 3, characterized in that, The thickness of the first substrate layer is greater than the thickness of the second substrate layer.

8. The radome according to claim 7, characterized in that, The thickness of the first substrate layer is 0.3 mm to 0.7 mm, and the thickness of the second substrate layer is 0.2 mm to 0.4 mm.

9. The radome according to any one of claims 1 to 3, characterized in that, The outer surface of the second substrate layer has a locally thickened area for enhancing structural strength.

10. An antenna assembly, characterized in that, include: The radome is the radome according to any one of claims 1 to 9; An antenna structure is disposed on one side of the first substrate layer near the radome.

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