Antenna housing

Abstract

The antenna housing comprises a housing body, an outer-layer housing and an inner-layer housing, the inner-layer housing is tightly attached to the inner wall of the outer-layer housing, the inner-layer housing comprises a first part located at the head of the housing body and a second part close to an opening of the housing body, and the end face of the second part abuts against the end face of the first part. The outer layer cover is made of a porous ceramic material, the second part is made of a phosphate-based ceramic material, and the first part is made of an aerogel material; and the connecting ring is fixed on the inner wall of the second part, and the connecting ring extends outwards from the opening of the cover body. According to the antenna housing, the thermal stress between the antenna housing and the connecting ring caused by an external high-temperature environment is reduced, and the problem of thermal expansion deformation of the connecting ring is avoided.

Description

Technical Field

[0001] This application relates to the technical field of radomes, and particularly to a radome. Background Art

[0002] In recent years, with the rapid development of aerospace vehicles, the performance requirements for radomes have become increasingly high. The radome is an important structural part of the vehicle, which needs to meet the stable operation requirements in high-temperature environments and provide reliable guarantees for communication, navigation and other systems in the aerospace field.

[0003] Currently, most radomes are made of fiber fabric materials, quartz ceramics or silicon nitride ceramics. However, fabric radomes have high costs and poor wave-transmitting performance, and it is difficult to meet the requirements of broadband wave transmission; ceramic radomes have low costs and have the performance of broadband wave transmission, but ceramic materials are highly brittle materials with a very small range of plastic deformation. In addition, due to the large brittleness of ceramic radomes, it is difficult to directly assemble them with the cabin section of the vehicle. Therefore, a connecting ring (usually made of metal material) needs to be installed at the end of the ceramic radome, and the assembly with the cabin section of the vehicle is achieved through the connecting ring.

[0004] There are great differences in mechanical and physical properties between ceramic radomes and connecting rings, resulting in significant problems in their thermal matching. Especially in high-temperature environments, ceramic radomes are easily cracked due to the thermal expansion of the connecting ring. In the prior art, screw connection and bonding are generally used between ceramic radomes and connecting rings. Thread connection is to combine the ceramic radome and the connecting ring with a certain number of screws. However, due to the large brittleness of the ceramic radome, it is difficult to drill holes in the ceramic radome, which is easy to produce chipped corners and obvious stress concentration at the hole edge. Moreover, due to the external heating of the ceramic radome, the thermal stress generated by the thermal matching between the ceramic radome and the connecting ring cannot be eliminated. Bonding is to combine the ceramic radome and the connecting ring with a well-elastic bonding material. However, bonding cannot eliminate thermal stress on the one hand and cannot ensure effective thermal protection on the other hand. Summary of the Invention

[0005] This application provides a radome, which can solve the high-temperature thermal matching problem between a ceramic radome and a connecting ring in the prior art, enable it to effectively overcome thermal stress and thermal protection, and meet the use requirements in high-temperature environments.

[0006] An embodiment of the present application provides an antenna radome, including: a radome body, including an outer radome and an inner radome, the inner radome is closely attached to the inner wall of the outer radome, the inner radome includes a first part located at the head of the radome body and a second part close to the opening of the radome body, the end faces of the second part and the first part are abutted against each other, the outer radome is made of a porous ceramic material, the second part is made of a phosphate-based ceramic material, and the first part is made of an aerogel material; a connecting ring, which is fixed to the inner wall of the second part and extends outward from the opening of the radome body.

[0007] In some embodiments, the connecting ring is connected to the inner wall of the second part by an adhesive, and the connecting ring is also connected to the second part by a plurality of pins, and the end face of the pin is flush with the inner wall of the connecting ring.

[0008] In some embodiments, the other end face of the pin is flush with the outer wall of the second part.

[0009] In some embodiments, the plurality of pins are arranged in a ring shape, and the center of the ring is located on the axis of the connecting ring; at least one ring of pins is provided on the connecting ring, and the pins in each ring are arranged at equal intervals.

[0010] In some embodiments, the second part covers a part of the inner wall of the outer radome, the second part is of a ring structure, and the caliber of its inner port close to the head of the radome body is smaller than the caliber of its outer port close to the opening of the radome body.

[0011] In some embodiments, the porous ceramic material used for the outer radome is fused silica ceramic or porous ceramic based on fused silicon nitride.

[0012] In some embodiments, the outer radome and the inner radome are connected by an adhesive or integrally welded by melting.

[0013] In some embodiments, the material of the connecting ring is invar or aluminum alloy.

[0014] In some embodiments, the thermal conductivity of the second part is 0.35 - 0.55 W / m·K, and its linear expansion coefficient is 1.5×10⁻⁶ / K - 2.4×10⁻⁶ / K.

[0015] In some embodiments, the temperature resistance of the adhesive is greater than 1300 °C.

[0016] The beneficial effects brought by the technical solution provided by the embodiment of the present application include:

[0017] By using a porous ceramic material to make the outer cover, it has both certain wave - transmitting properties and strength, and also has good environmental corrosion resistance. It can protect the inner cover and provide overall structural support for the radome. The inner cover is closely attached to the inner wall of the outer cover. Its first part is located at the head of the cover body and is made of aerogel material. Since the aerogel material has low density, low thermal conductivity, and good wave - transmitting properties, it can reduce interference with the antenna signal and play a certain heat - insulating role to protect internal equipment. The second part of the inner cover is close to the opening of the cover body and is made of phosphate - based ceramic material. Since the phosphate - based ceramic material has high strength, hardness, and good wear resistance, it can withstand external impacts and friction, ensuring the structural integrity of the radome during use.

[0018] By abutting the end face of the first part against the end face of the second part, a complete inner cover is formed, and the second part can also limit the first part.

[0019] By fixing the connecting ring on the inner wall of the second part, and the connecting ring extends outwards from the opening of the cover body, it is convenient to install the radome on the mounting seat on the inner wall of the cabin section of the aircraft, ensuring the stable installation of the radome. In addition, it can also prevent the heat of the second part from directly transferring to the connecting ring, thereby reducing the thermal stress generated by the thermal matching between the second part and the connecting ring.

[0020] In summary, by reasonably using different materials for the outer cover of the radome, the first part of the inner cover, and the second part of the inner cover, while ensuring that the radome has wave - transmitting properties, heat - insulating properties, and high strength, it can effectively provide thermal protection and thermal matching for the connecting ring through the second part of the inner cover, reduce the thermal stress between the radome and the connecting ring caused by the external high - temperature environment, avoid the thermal expansion and deformation problem of the connecting ring, realize the stable connection between the radome and the inner wall of the cabin section of the aircraft, and can better adapt to various working environments and performance requirements, improving the integrity and reliability of the aircraft antenna system. Through this application, the high - temperature thermal matching problem between the ceramic - type radome and the connecting ring in the prior art is solved, enabling it to overcome thermal stress and heat protection and meet the use requirements in high - temperature environments. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the following drawings are only some embodiments of the present application. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0022] Figure 1 It is a side cross - sectional view of the radome in the embodiment of the present application;

[0023] Figure 2 is Figure 1 a schematic diagram of the A-A cross-section in

[0024] In the figure:

[0025] 1. Cover body; 11. Outer cover; 12. Inner cover; 121. First part; 122. Second part;

[0026] 2. Connecting ring;

[0027] 3. Pin. Specific embodiments

[0028] In order to enable those skilled in the art of the present technology to better understand the solution of the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings 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 of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without making creative efforts belong to the scope of protection of the present application.

[0029] The embodiment of the present application provides an antenna cover, which can solve the high-temperature thermal matching problem between the ceramic antenna cover and the connecting ring in the prior art, enable it to effectively overcome thermal stress and heat protection, and meet the use requirements in a high-temperature environment.

[0030] Refer to Figure 1 , Figure 1 which is a side cross-sectional view of the antenna cover in the embodiment of the present application. As Figure 1 shown, the antenna cover includes a cover body 1 and a connecting ring 2. The shape of the cover body 1 is bullet-shaped or conical. The head of the cover body 1 is a tip, and the tail is an opening. The connecting ring 2 is fixed at the tail of the cover body 1, that is, the opening of the cover body 1. A chamber for accommodating the antenna is provided inside the cover body 1.

[0031] Specifically, the cover body 1 includes an outer cover 11 and an inner cover 12. The inner cover 12 is closely attached to the inner wall of the outer cover 11. Among them, the inner cover 12 includes two parts, namely a first part 121 located at the head of the cover body 1 and a second part 122 close to the opening (tail) of the cover body 1. The end face of the second part 122 abuts against the end face of the first part 121, and the second part 122 plays a limiting role on the first part 121. The connecting ring 2 mainly plays a connecting role. It is fixed on the inner wall of the second part 122 and extends outward from the opening of the cover body 1, and is fixedly connected to the mounting seat on the inner wall of the cabin section of the aircraft.

[0032] In the prior art, a radome is generally assembled with a cabin section of an aircraft (such as an airplane, a spacecraft, a rocket, and a missile) through a connecting ring 2 to protect its internal equipment (antenna) from the external environment. Therefore, the radome should have functions such as good wave transmission, strength, heat insulation, etc. Therefore, in order to avoid the thermal stress generated by the thermal matching between the radome and the connecting ring 2, the outer layer 11 can be made of a porous ceramic material, the second part 122 can be made of a phosphate-based ceramic material, and the first part 121 can be made of an aerogel material. Among them, the porous ceramic material can be selected from fused silica ceramics or porous silicon nitride-based ceramics.

[0033] In this embodiment, the outer layer 11 is made of a porous ceramic material, which has certain wave transmission and strength, and also has good anti-environmental corrosion ability, can protect the inner layer 12 and provide overall structural support for the radome. The inner layer 12 is closely attached to the inner wall of the outer layer 11. Its first part 121 is located at the head of the radome body 1 and is made of an aerogel material. Since the aerogel material has low density, low thermal conductivity, and good wave transmission, it can reduce the interference with the antenna signal and play a certain heat insulation role to protect the internal equipment. The second part 122 of the inner layer 12 is close to the opening of the radome body 1 and is made of a phosphate-based ceramic material. Since the phosphate-based ceramic material has high strength, hardness, and good wear resistance, it can withstand external impacts and friction to ensure the structural integrity of the radome during use.

[0034] By abutting the end face of the first part 121 against the end face of the second part 122, a complete inner layer 12 can be formed, and the second part 122 can also limit the position of the first part 121.

[0035] By fixing the connecting ring 2 on the inner wall of the second part 122, the connecting ring 2 extends outward from the opening of the radome body 1, which is convenient for installing the radome on the mounting seat on the inner wall of the cabin section of the aircraft to ensure the stable installation of the radome. In addition, it can also prevent the heat of the second part 122 from being directly transferred to the connecting ring 2, thereby reducing the thermal stress generated by the thermal matching between the second part 122 and the connecting ring 2.

[0036] In summary, by reasonably using different materials for the outer cover 11 of the radome, the first part 121 of the inner cover 12, and the second part 122 of the inner cover 12, while ensuring that the radome has wave transmission, heat insulation, and high strength, it is also possible to effectively thermally protect and thermally match the connecting ring 2 through the second part 122 of the inner cover 12, reduce the thermal stress between the radome and the connecting ring 2 caused by the external high-temperature environment, avoid the problem of thermal expansion deformation of the connecting ring 2, achieve a stable connection between the radome and the inner wall of the cabin section of the aircraft, and can better adapt to various working environments and performance requirements, improving the overall performance and reliability of the aircraft antenna system. Through this embodiment, the problem of high-temperature thermal matching between the ceramic radome and the connecting ring 2 in the prior art is solved, enabling it to overcome thermal stress and heat protection and meet the usage requirements in high-temperature environments.

[0037] Further, in one embodiment, as Figure 1 shown, an adhesive is used to connect between the inner wall of the connecting ring 2 and the second part 122, and the connecting ring 2 is also connected to the second part 122 through a plurality of pins 3, and the end face of the pin 3 is flush with the inner wall of the connecting ring 2. In this embodiment, first, an adhesive is used to connect between the inner wall of the connecting ring 2 and the second part 122 to form a wide bonding surface, filling the minute unevenness on the surface, making the two fit closely, effectively increasing the firmness of the connection, and ensuring that the connecting ring 2 will not easily separate from the second part 122 during the use of the radome. In addition, the adhesive can play a certain sealing role, preventing external dust, water vapor and other impurities from entering the connection gap between the connecting ring 2 and the second part 122, and avoiding corrosion or other damages to the connection part caused by these impurities, thereby prolonging the service life of the radome. The connecting ring 2 is connected to the second part 122 through a plurality of pins 3. First, the pins 3 can withstand a large shear force, and on the basis of the adhesive connection, further enhance the connection strength between the connecting ring 2 and the second part 122. Especially when the radome is subjected to a large external force impact or vibration, the pins 3 can effectively prevent the connecting ring 2 from having relative displacement or loosening, improving the stability of the entire structure. At the same time, during the installation process, the pins 3 can be used as positioning elements to ensure that the relative positions of the connecting ring 2 and the second part 122 are accurate, facilitating precise installation and ensuring the overall structural accuracy of the radome.

[0038] Another point is that the holes for installing the pins 3 are relatively small. When drilling holes, there will be no problems such as difficult drilling, easy occurrence of corner chipping, and obvious stress concentration at the hole edges as in the case of drilling holes for screws. The end face of the pin 3 is flush with the inner wall of the connecting ring 2, which can make the inner wall surface of the connecting ring 2 smooth, reduce the hindrance to signal propagation, ensure the normal transmission of internal devices within the radome, improve the performance of the antenna system, and at the same time make the stress distribution at the connection part more uniform. If the end face of the pin 3 is not flush with the inner wall of the connecting ring 2, when subjected to external forces, the protruding or recessed parts are likely to form stress concentration points, resulting in excessive local stress on the connecting ring 2, reducing the reliability of the connection, and even possibly causing deformation or damage to the connecting ring 2. And when the end face of the pin 3 is not flush with the inner wall of the connecting ring 2, it helps to avoid this situation and enhance the overall strength and load-bearing capacity of the connecting ring 2.

[0039] In some other embodiments, the number of pins 3 can be 4 - 15, depending on the actual situation.

[0040] Further, in one embodiment, as Figure 1 shown, the other end face of the pin 3 is flush with the outer wall of the second part 122. In this embodiment, by setting the other end face of the pin 3 to be flush with the outer wall of the second part 122, the connection strength and load-bearing capacity between the connecting ring 2 and the second part 122 are ensured.

[0041] Further, in one embodiment, refer to Figure 2 , Figure 2 which is Figure 1 a schematic diagram of the A - A cross-section in Figure 1 . As

[0042] shown, multiple pins 3 are arranged in a ring, and the center of the ring is located on the axis of the connecting ring 2; at least one ring of pins 3 is provided on the connecting ring 2, and the pins 3 in each ring are equally spaced. In this embodiment, during the actual use of the radome, it will be subjected to various external forces, such as wind force, vibration, etc. When the connecting ring 2 and the second part 122 are connected by the above-mentioned multiple pins 3 arranged in a ring and equally spaced, the external forces can be evenly distributed to each pin 3. Compared with the situation where the pins 3 are randomly distributed, this can avoid local stress concentration, enable the connection part to bear greater loads, enhance the reliability and stability of the connection, and ensure that the radome can still work normally under complex mechanical environments.

[0043] Further, in one embodiment, as Figure 1 shown, the second part 122 covers a part of the inner wall of the outer cover 11. The second part 122 is in an annular structure, and the diameter of its inner port near the head of the cover body 1 is smaller than the diameter of its outer port near the opening of the cover body 1. In this embodiment, as a part of the inner cover 12, the outer wall area of the second part 122 is much smaller than the outer wall area of the whole inner cover 12. In this embodiment, the inner wall area of the outer cover 11 is substantially approximately equal to the outer wall area of the whole inner cover 12. Therefore, the second part 122 can only cover a part of the inner wall of the outer cover 11. The two are closely attached to each other, increasing the contact area and making this connection method more stable. In this embodiment, the shape of the radome is bullet-shaped or conical. The second part 122 is near the opening of the cover body 1, and its shape can be an annular structure. The diameter of the inner port of the second part 122 near the head of the cover body 1 is smaller than the diameter of the outer port near the opening of the cover body 1, forming a shape similar to a flared opening. This shape is also beneficial to the installation of the connecting ring 2.

[0044] Furthermore, in one embodiment, the porous ceramic material used for the outer cover 11 is fused silica ceramic or porous silicon nitride-based ceramic. In this embodiment, from the perspective of wave transmission performance, both of these two materials, fused silica ceramic and porous silicon nitride-based ceramic, have excellent wave transmission properties. Among them, fused silica ceramic has a low dielectric constant and low dielectric loss, which can allow the electromagnetic waves emitted and received by the antenna installed inside the radome to pass through efficiently, reduce signal attenuation, and ensure the normal operation of the aircraft's antenna system. The porous silicon nitride-based ceramic also has good wave transmission properties. Its porous structure can adjust the dielectric properties of the material to a certain extent, further optimizing the transmission effect of electromagnetic waves in different frequency bands, so that the radome can maintain good signal transmission ability in a wide frequency band range. From the perspective of high mechanical strength and wear resistance, both fused silica ceramic and porous silicon nitride-based ceramic have relatively high mechanical strength. Fused silica ceramic has good compressive strength and tensile strength, and can withstand various external forces suffered by the radome during use, such as wind force, mechanical vibration, etc., and is not easily cracked or deformed. The porous silicon nitride-based ceramic not only has high strength but also good wear resistance. Its surface hardness is relatively high, which can resist wear caused by natural factors such as sand, wind, and rain, as well as some human factors, extend the service life of the radome, and ensure that its structural integrity and performance stability can be maintained during long-term use. From the perspective of high temperature resistance performance, both of these two materials have excellent high temperature resistance performance. Fused silica ceramic can maintain stable physical and chemical properties in a high temperature environment. It has a relatively high melting point and a small thermal expansion coefficient, and is not easily softened, deformed, or cracked at high temperatures. The porous silicon nitride-based ceramic also has good high temperature resistance characteristics and can withstand the erosion of high temperature gas flow and thermal radiation. From the perspective of good chemical stability, both fused silica ceramic and porous silicon nitride-based ceramic have strong chemical stability. They are not easily eroded by chemical substances such as acids and alkalis, and can maintain stable performance in a harsh chemical environment. This characteristic enables the radome to resist the influence of chemical substances in different working environments, whether it is in a humid coastal area or in an industrial environment with corrosive gases, ensuring the long-term reliability and service life of the radome. Therefore, both fused silica ceramic and porous silicon nitride-based ceramic are relatively suitable as the material for making the outer cover 11, and either one can be selected.

[0045] Furthermore, in one embodiment, the outer cover 11 and the inner cover 12 are connected or fusion-welded together by an adhesive. In this embodiment, the outer cover 11 and the inner cover 12 are connected together by an adhesive. The adhesive can fill the tiny gaps between the outer cover 11 and the inner cover 12 to form a good sealing structure, effectively preventing impurities such as dust, water vapor, and rainwater in the outside world from entering the inside of the radome, protecting internal devices such as antennas from being eroded by the external environment, and improving the protection performance of the radome. At the same time, the adhesive has a certain elasticity and flexibility. When the radome is impacted or vibrated by an external force, it can play a role in shock absorption and buffering, reducing the relative displacement and friction between the outer cover 11 and the inner cover 12, reducing the risk of structural fatigue and damage caused by vibration, and extending the service life of the radome. In addition, if local damage occurs to the radome during use, the adhesive connection method is convenient for repair. The damaged part of the adhesive can be removed, the damaged component can be replaced, and then the adhesive can be reapplied for connection, and the repair cost is relatively low.

[0046] The outer cover 11 and the inner cover 12 are fusion-welded together. By heating the connection part of the two cover bodies 1 to the melting state, they are fused together to form an integral connection structure. This connection method can provide a very high connection strength, making the combination between the outer cover 11 and the inner cover 12 more firm, capable of withstanding greater external forces and pressures, and is suitable for occasions with higher requirements for structural strength. At the same time, the connection part formed by fusion welding has good high-temperature resistance, can maintain a stable connection strength in a high-temperature environment, and is not prone to problems such as cracking and falling off due to temperature changes. In addition, the connection part after fusion welding shows excellent chemical stability and is not easily eroded and corroded by chemical substances.

[0047] Furthermore, in one embodiment, the material of the connecting ring 2 is invar or aluminum alloy. In this embodiment, during the actual use of the radome, in an external high-temperature environment, the connecting ring 2 may cause damage to the inner cover 12 and the outer cover 11 due to thermal expansion. Therefore, when the material of the connecting ring 2 is invar, due to the extremely low coefficient of thermal expansion of invar, the size of the connecting ring 2 can remain highly stable when the temperature changes; secondly, when the connecting ring 2 is made of invar material, it can adapt to various complex working conditions on the premise of ensuring the structural safety of the radome, is not prone to deformation or fracture, and improves the durability of the entire connection structure.

[0048] When the material of the connecting ring 2 is aluminum alloy, due to the relatively small density of aluminum alloy, it is light in weight. Using aluminum alloy to make the connecting ring 2 can effectively reduce the overall weight of the radome. In addition, a dense oxide film is easily formed on the surface of aluminum alloy, and this oxide film can protect the internal metal from being eroded by the external environment and has good corrosion resistance. Most importantly, aluminum alloy has good thermal conductivity and can quickly dissipate the heat generated at the connection part, effectively avoiding local overheating of the connecting ring 2, ensuring the stable performance between the connecting ring 2 and the second part 122, and extending the service life of the radome.

[0049] Further, in one embodiment, the thermal conductivity of the second part 122 is 0.35 - 0.55 W / m·K, and its linear expansion coefficient is 1.5×10⁻⁶ / K - 2.4×10⁻⁶ / K. In this embodiment, the thermal conductivity of the second part 122 being 0.35 - 0.55 W / m·K belongs to a relatively low thermal conductivity range, which can effectively slow down the heat transfer. When the external environmental temperature changes greatly, it can maintain its own temperature relatively stable and reduce the influence of thermal fluctuations on the performance of the connecting ring 2 or internal equipment.

[0050] The linear expansion coefficient of the second part 122 being 1.5×10⁻⁶ / K - 2.4×10⁻⁶ / K means that when the temperature of the second part 122 changes, the change in its size is very small. No matter how the environmental temperature changes, the connection between the second part 122 and the connecting ring 2 or the outer cover 11 will not become loose or deformed due to thermal expansion and contraction, ensuring the stability of the entire radome structure, and thus ensuring that the electrical and mechanical properties of the antenna are not affected. At the same time, it can also reduce the stress concentration phenomenon caused by thermal expansion mismatch, reduce the risk of structural damage, and improve the reliability and service life of the radome.

[0051] Further, in one embodiment, the heat resistance of the adhesive is greater than 1300 °C. In this embodiment, during actual use, the radome may face a high-temperature environment. For example, when a high-speed aircraft flies in the atmosphere, a large amount of heat is generated due to air friction, and the surface temperature of the radome may rise sharply. The adhesive having a heat resistance greater than 1300 °C can maintain stable performance under such high-temperature conditions, ensuring the firm connection between the outer cover 11 and the inner cover 12, and will not cause the adhesive to fail and the connection to become loose due to excessive temperature, thus ensuring the structural integrity and protection performance of the radome.

[0052] In some other embodiments, the thicknesses of the outer cover 11 and the second part 122 are determined according to the actual situation and are not specifically set here.

[0053] In the description of the present application, it should be noted that the orientation or positional relationship indicated by terms such as "upper" and "lower" is based on the orientation or positional relationship shown in the drawings. This is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present application. Unless otherwise clearly specified and defined, the terms "installed", "connected", and "coupled" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific circumstances.

[0054] It should be noted that in the present application, relational terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprising", "including" or any other variation thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not expressly listed, or elements inherent to such process, method, article or device. Without further limitation, an element defined by the statement "including one..." does not exclude the existence of another identical element in the process, method, article or device including the said element.

[0055] The above are only specific embodiments of the present application, enabling those skilled in the art to understand or implement the present application. Various modifications to these embodiments will be obvious to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to these embodiments shown herein, but rather to the broadest scope consistent with the principles and novel features claimed herein.

Claims

1. An antenna radome, characterized in that, Comprising: A cover body (1), including an outer cover (11) and an inner cover (12). The inner cover (12) is closely attached to the inner wall of the outer cover (11). The inner cover (12) includes a first part (121) at the head of the cover body (1) and a second part (122) near the opening of the cover body (1). The end face of the second part (122) abuts against the end face of the first part (121). The outer cover (11) is made of porous ceramic material, the second part (122) is made of phosphate-based ceramic material, and the first part (121) is made of aerogel material; A connecting ring (2), which is fixed to the inner wall of the second part (122) and extends outward from the opening of the cover body (1).

2. The radome according to claim 1, characterized in that, The connecting ring (2) is connected to the inner wall of the second part (122) by an adhesive, and the connecting ring (2) is also connected to the second part (122) by a plurality of pins (3). The end face of the pin (3) is flush with the inner wall of the connecting ring (2).

3. The radome according to claim 2, characterized in that, The other end face of the pin (3) is flush with the outer wall of the second part (122).

4. The radome according to claim 2, characterized in that, The plurality of pins (3) are arranged in a ring, and the center of the ring is located on the axis of the connecting ring (2); at least one ring of pins (3) is provided on the connecting ring (2), and the pins (3) in each ring are arranged at equal intervals.

5. The radome according to claim 1, characterized in that, The second part (122) covers a part of the inner wall of the outer cover (11). The second part (122) is of a ring structure, and the caliber of its inner port near the head of the cover body (1) is smaller than the caliber of its outer port near the opening of the cover body (1).

6. The radome according to claim 1, characterized in that, The porous ceramic material used for the outer cover (11) is fused silica ceramic or porous ceramic based on fused silicon nitride.

7. The radome according to claim 1, characterized in that, The outer cover (11) and the inner cover (12) are connected into one body by an adhesive or fusion welding.

8. The radome according to claim 1, wherein, The material of the connecting ring (2) is invar or aluminum alloy.

9. The radome according to claim 1, wherein, The thermal conductivity of the second part (122) is 0.35 - 0.55 W / m·K, and its linear expansion coefficient is 1.5×10⁻⁶ / K - 2.4×10⁻⁶ / K.

10. The radome according to any one of claims 1-9, characterized in that, The heat resistance of the adhesive is greater than 1300 °C.

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