Low-loss portable radome structure

Abstract

The invention relates to a low-loss portable radome structure which comprises a plurality of radome units, and the radome units are detachably connected to form a radome assembly. The antenna housing unit comprises an upper surface and a lower surface; an air cavity is formed between the upper surface and the lower surface of the radome unit; the upper surface and the lower surface of the radome unit are made of low-dielectric-constant materials. According to the technical scheme, the outermost layer of the antenna housing unit is made of a low-dielectric-constant material, the loss is low, the middle layer is made of air, the dielectric constant is approximate to 1 and is only caused by the height of an air cavity, and compared with an existing antenna housing, the loss is low, and therefore the low-loss performance can be achieved. The antenna housing unit in the technical scheme can also reduce the attenuation of electromagnetic waves and reduce the interference of reflected waves. The radome units can be detachably connected to form the radome assembly, and the radome assembly can be detached and transplanted to the next antenna system to serve as the radome after being used on the current antenna system.

Description

Technical Field

[0001] This application relates to the technical field of antenna protection devices, and particularly to a low-loss and portable radome structure. Background Art

[0002] A radome mainly functions to protect the antenna and related equipment, avoiding the influence of various harsh environments on the antenna, especially in some special climatic and geographical conditions such as high-cold regions, deserts, and islands. This improves the service life of the antenna, enhances the operating environment of the antenna, and also reduces costs. Therefore, the radome is essential for radar and communication systems. However, since the radome is located above the antenna, it will inevitably affect the performance of the antenna. Due to the influence of the radome, the radiation performance of the antenna will inevitably deteriorate, such as changes in the radiation pattern like a decrease in antenna gain, a broadening of the beam width, and a pointing offset. The loss of the radome directly affects the ability of the antenna to radiate, and due to the materials and processing of the radome, its design and production costs cannot be ignored. Therefore, the research on low-loss and low-cost radomes has important application value.

[0003] The radomes in the prior art can generally be divided into two categories: single-layer structures and multi-layer structures. The single-layer radome has increased losses, a narrow frequency band, and is sensitive to the incident angle. The multi-layer radome often cannot take into account low loss, low cost, and incident angle sensitivity simultaneously. Summary of the Invention

[0004] To at least partly overcome the problem that the radomes in the related art cannot take into account low loss, low cost, and incident angle sensitivity simultaneously, this application provides a low-loss and portable radome structure.

[0005] The solution of this application is as follows: A low-loss and portable radome structure, comprising: A plurality of radome units, which are detachably connected to form a radome assembly; The radome unit includes an upper surface and a lower surface; There is an air cavity between the upper surface and the lower surface of the radome unit; Both the upper surface and the lower surface of the radome unit are made of low-dielectric constant materials.

[0006] Preferably, the total thickness of the radome unit is an integer multiple of half a wavelength.

[0007] Preferably, the thicknesses of the upper surface and the lower surface of the radome unit are adjustable.

[0008] Preferably, the radome unit is in the structure of a regular triangular prism; The upper surface of the radome unit is the upper surface of the regular triangular prism; The lower surface of the radome unit is the lower surface of a regular triangular prism.

[0009] Preferably, three support columns are arranged inside the radome unit with a regular triangular prism structure.

[0010] Preferably, the support columns are arranged at the intersections of the three side surfaces of the triangular prism structure.

[0011] Preferably, the support columns have a regular triangular prism structure.

[0012] The technical solution provided by this application may include the following beneficial effects: The low-loss and portable radome structure in this application includes: a plurality of radome units, and the radome units form a radome assembly through detachable connections; the radome unit includes an upper surface and a lower surface; there is an air cavity between the upper surface and the lower surface of the radome unit; both the upper surface and the lower surface of the radome unit are made of low-dielectric constant materials. The outermost layer of the radome unit in this technical solution is made of a low-dielectric constant material with low loss, and the middle layer is air with a dielectric constant approximately 1. The loss is only caused by the height of the air cavity and is lower than that caused by the existing radome. Therefore, the performance of low loss can be achieved. During the transmission of electromagnetic waves in the radome unit, the smaller the dielectric constant of the intermediate medium, the better. Since the intermediate medium of the radome unit in this technical solution is air, the attenuation of electromagnetic waves is greatly reduced. And since the thickness of the radome is an integer multiple of half-wavelength, the reflected electromagnetic waves will cancel each other out after passing through half-wavelength, further reducing the interference of the reflected waves. Moreover, the radome units in this application can be detachably connected to form a radome assembly. After being used on the current antenna system, it can be disassembled and transplanted to the next antenna system as a radome, thereby saving materials and greatly reducing costs.

[0013] It should be understood that the above general description and the following detailed description are only exemplary and explanatory, and cannot limit this application. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The accompanying drawings herein are incorporated into the specification and form a part of this specification, showing embodiments consistent with this application, and are used together with the specification to explain the principles of this application.

[0015] Figure 1 is a schematic cross-sectional structure diagram of a radome unit provided by an embodiment of this application; Figure 2 is a schematic diagram of an existing radome; Figure 3 is a schematic diagram of the propagation of electromagnetic waves in the radome unit provided by an embodiment of this application; Figure 4It is an external view of a radome unit provided by an embodiment of the present application; Figure 5 It is a schematic diagram of a radome assembly formed by splicing radome units provided by an embodiment of the present application. Detailed implementation manners

[0016] Here, the exemplary embodiments will be described in detail, and the examples are shown in the drawings. When the following description refers to the drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. The implementation manners described in the following exemplary embodiments do not represent all implementation manners consistent with the present application. On the contrary, they are merely examples of devices and methods consistent with some aspects of the present application as detailed in the appended claims.

[0017] Figure 1 It is a schematic cross-sectional structure diagram of a radome unit provided by an embodiment of the present application. Referring to Figure 1 , a low-loss portable radome structure includes: A plurality of radome units, and the radome units form a radome assembly through detachable connection; The radome unit includes an upper surface and a lower surface; There is an air cavity between the upper surface and the lower surface of the radome unit; Both the upper surface and the lower surface of the radome unit are made of low-dielectric constant materials.

[0018] With the continuous development of millimeter-wave wireless communication technology, the optimized design of radomes applicable to the millimeter-wave band is crucial for communication systems. Due to the differences in scenarios and required performance of various radar and antenna devices, there will also be differences in the shapes and materials of radomes. Referring to Figure 2 , according to the radome structure, it can generally be divided into two categories: single-layer structure and multi-layer structure, with a total of four types. Figure 2 For the radome of type (1) in [[ ]], the thickness of the radome is generally an integer multiple of half a wavelength. Due to considering the structural strength, some materials doped with reinforcing fibers are used to improve the strength, but this will also increase the loss, and the frequency band is relatively narrow and sensitive to the incident angle; Figure 2 For the radome of type (2) in [[ ]], usually the outer two layers are made of high-dielectric constant materials, and the middle layer is made of low-dielectric constant materials. It has good mechanical properties, but the loss cannot be ignored. Figure 2 For the radome of type (3) in [[ ]], the structure is exactly opposite to that of type (2). The outer two layers are made of low-dielectric constant materials, and the middle layer is made of high-dielectric constant materials. This type of structure has good electrical properties, but the mechanical properties are not good enough, and its strength is insufficient. Figure 2The radome structure of class (4) has the lowest low reflectivity. Thanks to the five-layer structure, when the thickness is designed appropriately, the reflected waves can be cancelled out. However, its thickness is the thickest, so it is more sensitive to the incident angle and the cost is also higher than that of the other three classes.

[0019] The radome structure proposed by the present invention can achieve low loss, high structural strength and low cost. Its structure is as Figure 1 shown. The two outer layers are made of materials with low dielectric constants, such as skins. The thicknesses of the two materials can be variable, but the total thickness of the radome is generally an integer multiple of half-wavelength, which will be determined according to simulation conditions such as loss. The outermost layer is a material with a low dielectric constant and low loss. The middle layer is air, and the dielectric constant is approximately 1. The loss caused only by the height of the air cavity is lower than that caused by the added materials in the radome structures of classes (2), (3) and (4) in Figure 2 . Therefore, the performance of low loss can be achieved.

[0020] As Figure 3 shown, the electromagnetic wave propagates incident from bottom to top, and successively enters the medium, air, medium and then enters the air again. Therefore, reflection phenomena will occur at the interfaces of different medium regions. A is the total energy at the time of incidence, B is the energy required for transmission, and losses should be avoided as much as possible, which is represented by the solid arrow. C is the reflected energy, and its energy magnitude should be cancelled out or attenuated as much as possible, which is represented by the dashed arrow. During the transmission process, since the smaller the dielectric constant of the middle medium is, the better, using air as the middle medium can greatly reduce the attenuation amount. And since the thickness of the radome is an integer multiple of half-wavelength, after C passes through half-wavelength, they will cancel each other out, further reducing the interference of the reflected wave.

[0021] For the low-loss and portable radome structure in this embodiment, referring to Figure 4 , the radome unit is in the shape of a regular triangular prism; The upper surface of the radome unit is the upper surface of the regular triangular prism; The lower surface of the radome unit is the lower surface of the regular triangular prism.

[0022] Furthermore, three support columns are arranged inside the radome unit in the shape of a regular triangular prism.

[0023] Preferably, the support columns are arranged at the intersections of the three side faces of the triangular prism structure.

[0024] Preferably, the support columns are in the shape of a regular triangular prism.

[0025] The radome in this embodiment is as Figure 4 shown, designed in the shape of a regular triangular prism, and three small regular triangular prism structures are also arranged at the edge corners as support columns to play a supporting role and increase the structural strength.

[0026] The radome assembly formed by the detachable connection between the radome units in this embodiment is as follows Figure 5 shown Figure 5 It is a radome assembly formed by 6 radome units. Larger radome assemblies can also be formed by more radome units, which can be determined according to requirements in specific practices.

[0027] The radome units in this embodiment can also be detached and transplanted onto the next antenna system as radomes, thereby saving materials and greatly reducing costs.

[0028] It can be understood that the same or similar parts in the above embodiments can be referred to each other. For the content not described in detail in some embodiments, reference can be made to the same or similar content in other embodiments.

[0029] It should be noted that in the description of this application, the terms "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance. In addition, in the description of this application, unless otherwise specified, the meaning of "a plurality" refers to at least two.

[0030] In the description of this specification, the description with reference to terms such as "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of this application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples.

[0031] Although the embodiments of this application have been shown and described above, it can be understood that the above embodiments are exemplary and should not be construed as limiting this application. Those of ordinary skill in the art can make changes, modifications, substitutions, and variations to the above embodiments within the scope of this application.

Claims

1. A low-loss portable radome structure, characterized in that Comprising: A plurality of radome units, which form a radome assembly through detachable connection between the radome units; The radome unit includes an upper surface and a lower surface; There is an air cavity between the upper surface and the lower surface of the radome unit; Both the upper surface and the lower surface of the radome unit are made of low dielectric constant materials.

2. The low-loss portable radome structure according to claim 1, characterized in that, The total thickness of the radome unit is an integer multiple of half wavelength.

3. The low-loss portable radome structure according to claim 2, wherein The thickness of the upper surface and the lower surface of the radome unit is adjustable.

4. The low-loss portable radome structure according to claim 1, wherein, The radome unit has a regular triangular prism structure; The upper surface of the radome unit is the upper surface of the regular triangular prism; The lower surface of the radome unit is the lower surface of the regular triangular prism.

5. The low-loss portable radome structure according to claim 4, characterized in that, Three support columns are arranged inside the radome unit with a regular triangular prism structure.

6. The low-loss portable radome structure according to claim 5, wherein, The support columns are arranged at the intersections of the three side surfaces of the triangular prism structure.

7. The low-loss portable radome structure according to claim 5, wherein, The support columns have a regular triangular prism structure.

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