Antenna window structure

Abstract

The application discloses an antenna window structure, which comprises a radome, a heat insulation structure, a fastener, an antenna assembly and a heat insulation frame with a first accommodating cavity inside; an installation groove for accommodating the antenna assembly is arranged on a cabin body, the heat insulation frame is arranged around the installation groove, the heat insulation structure comprises a heat insulation body arranged opposite to the antenna assembly and a first installation part protruding from the edge of the heat insulation body, the radome comprises a window arranged opposite to the heat insulation body, a second installation part protruding from the edge of the window and arranged opposite to the first installation part and a connecting part protruding from the edge of the second installation part; the first installation part is in abutment with the antenna assembly, the second installation part is in abutment with the first installation part, the connecting part is in sealing connection with the heat insulation frame, the fastener penetrates through the second installation part, the first installation part and the antenna assembly in sequence and is in fixed connection with the cabin body, so that the antenna assembly, the heat insulation structure, the radome and the heat insulation frame are all fixed on the cabin body. The antenna window structure of the application does not need to open the cabin body and is convenient to install and disassemble.

Description

Technical Field

[0001] This invention relates to the field of aircraft antenna window technology, and more specifically, to an antenna window structure. Background Technology

[0002] Satellite antennas for aircraft are one of the elements that provide position and location data during the operation of an aircraft. They are usually used in conjunction with inertial navigation devices to provide navigation data for the aircraft in the initial and intermediate phases.

[0003] For new aircraft, the surface temperature can instantly exceed 1000°C, while the ambient temperature for normal antenna operation does not exceed 80°C. Therefore, composite material radomes and heat-insulating structures with wave-transmitting function are required.

[0004] Aircraft antenna window structures typically need to be mounted outside the aircraft cabin. Existing antenna window structures require an opening in the cabin for operation, often necessitating installation from the inside out and disassembly from the outside in. This not only makes installation and disassembly inconvenient but also introduces thermal sealing issues due to the opening design. When the antenna window structure needs to be mounted outside a closed cabin with limited internal space and high airtightness requirements, the aforementioned existing antenna window structures clearly cannot meet the installation and disassembly requirements. Summary of the Invention

[0005] The purpose of this invention is to overcome the above-mentioned defects of the prior art and provide an antenna window structure that allows for installation and disassembly from the outside of the cabin. This not only eliminates the need for openings in the cabin but also meets the requirements for installation and disassembly of enclosed cabins with small internal space and high airtightness.

[0006] To achieve the above objectives, the technical solution of the present invention is as follows:

[0007] An antenna window structure includes an radome, a heat insulation structure, fasteners, an antenna assembly, and a heat insulation frame having a first receiving cavity inside; a housing is provided with a mounting slot for accommodating the antenna assembly, the antenna assembly is accommodated in the mounting slot, the heat insulation frame is arranged around the mounting slot, the heat insulation frame is sealed to the housing, the heat insulation structure and the radome are both accommodated in the first receiving cavity, the heat insulation structure is arranged close to the antenna assembly, and the radome is arranged on the side of the heat insulation structure opposite to the antenna assembly;

[0008] The heat insulation structure includes a heat insulation body disposed opposite to the antenna assembly and a first mounting portion protruding from the edge of the heat insulation body. The antenna cover includes a window disposed opposite to the heat insulation body, a second mounting portion protruding from the edge of the window and disposed opposite to the first mounting portion, and a connecting portion protruding from the edge of the second mounting portion.

[0009] The first mounting part abuts against the antenna assembly, the second mounting part abuts against the first mounting part, the connecting part is sealed to the heat insulation frame, and the fastener passes through the second mounting part, the first mounting part and the antenna assembly in sequence, and is fixedly connected to the cabin body, so that the antenna assembly, the heat insulation structure, the radome and the heat insulation frame are all fixed to the cabin body.

[0010] Implementing the embodiments of the present invention will have the following beneficial effects:

[0011] The antenna window structure of this invention is located on the cabin without openings to the cabin, thus avoiding thermal sealing problems caused by openings. The antenna window structure can be installed and disassembled from outside the cabin, making installation and disassembly more convenient. It is particularly suitable for installation outside enclosed cabins with limited internal space and high airtightness requirements, such as aircraft fuel tank structures. This invention uses a heat-insulating frame and structure to isolate external high heat from the sides and front of the radome, respectively, preventing high heat from affecting the antenna assembly. By using fasteners for one-step fixing, the antenna assembly, heat-insulating structure, radome, and heat-insulating frame are all fixed to the cabin, making installation more convenient. Attached Figure Description

[0012] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art 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.

[0013] in:

[0014] Figure 1 This is an exploded view of the antenna window structure according to a specific embodiment of the present invention.

[0015] Figure 2 yes Figure 1 The top view of the assembled structure shown.

[0016] Figure 3 yes Figure 2 Sectional view of AA.

[0017] Figure 4 yes Figure 2 BB section view.

[0018] Figure 5 yes Figure 2 CC section view. Detailed Implementation

[0019] 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. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0020] refer to Figures 1-5 This invention discloses an antenna window 11 structure, including an antenna cover 10, a heat insulation structure 20, a fastener 30, an antenna assembly 40, and a heat insulation frame 50 having a first receiving cavity 51 inside. A mounting groove 61 for accommodating the antenna assembly 40 is provided on a housing 60, and the antenna assembly 40 is accommodated in the mounting groove 61. The heat insulation frame 50 is arranged around the mounting groove 61, and the heat insulation frame 50 is sealed to the housing 60 with high-temperature adhesive (such as KH-RTV-400 adhesive). The heat insulation structure 20 and the antenna cover 10 are both accommodated in the first receiving cavity 51. The heat insulation structure 20 is located close to the antenna assembly 40, and the antenna cover 10 is located on the side of the heat insulation structure 20 facing away from the antenna assembly 40. The heat insulation structure 20 includes a heat insulation body disposed opposite to the antenna assembly 40. The antenna radome 10 includes a window 11 opposite to the heat insulation body 21, a second mounting part 12 protruding from the edge of the window 11 and opposite to the first mounting part 23, and a connecting part 13 protruding from the edge of the second mounting part 12. The first mounting part 23 abuts against the antenna assembly 40, the second mounting part 12 abuts against the first mounting part 23, and the connecting part 13 is sealed to the heat insulation frame 50. Specifically, this is achieved by bonding the entire surface of the mating position with high-temperature resistant adhesive. Fasteners 30 pass through the second mounting part 12, the first mounting part 23, and the antenna assembly 40 in sequence and are fixedly connected to the cabin 60, so that the antenna assembly 40, the heat insulation structure 20, the antenna radome 10, and the heat insulation frame 50 are all fixed to the cabin 60.

[0021] The antenna window 11 structure in the above embodiment is disposed on the cabin 60 without opening the cabin 60, which can avoid the thermal sealing problem caused by the opening of the cabin 60; the installation and disassembly of the antenna window 11 structure of the present invention can be carried out from outside the cabin 60, making installation and disassembly more convenient, especially suitable for installation outside the closed cabin 60 with small internal space and high airtightness requirements; the present invention, by setting the heat insulation frame 50 and the heat insulation structure 20, respectively isolates the external high heat from the side and front of the antenna cover 10, avoiding the high heat from affecting the antenna assembly 40; by using fasteners 30 to fix in one step, the antenna assembly 40, the heat insulation structure 20, the antenna cover 10 and the heat insulation frame 50 are all fixed on the cabin 60, making installation more convenient.

[0022] In the above embodiment, the antenna assembly 40 receives and transmits signals through the heat insulation body 21 and the antenna cover 10, and both the heat insulation body 21 and the antenna cover 10 are transparent.

[0023] In the above embodiment, the installation sequence of the antenna window 11 structure is as follows: heat insulation frame 50, antenna assembly 40, heat insulation structure 20, antenna cover 10 and fastener 30 are installed in sequence.

[0024] refer to Figures 3-5 Furthermore, in one specific embodiment, the radome 10 also includes a surrounding wall 14 extending from the second mounting portion 12 to the first mounting portion 23. The surrounding wall 14 and the window 11 form a second receiving cavity, in which the heat insulation body 21 is accommodated. The end of the surrounding wall 14 abuts against the first mounting portion 23, and the surrounding wall 14 is engaged with the inner wall of the first receiving cavity 51. A settling groove 52 is provided at the port of the first receiving cavity 51 facing away from the cabin 60, and the connecting portion 13 is engaged with the settling groove 52. Through the above structure, the radome 10 and the heat insulation frame 50 are fully sealed, preventing external hot airflow from entering through the gap between the radome 10 and the heat insulation frame 50, even under high-speed flight.

[0025] Furthermore, in one specific embodiment, the heat insulation frame 50 is an elastic body, the connecting part 13 is interference-fitted with the settling groove 52, and the enclosure wall 14 is interference-fitted with the inner wall of the first receiving cavity 51, further improving the sealing performance. Specifically, the heat insulation frame 50 is made of rigid ceramic tile or composite thermal protection material.

[0026] Furthermore, in one specific embodiment, the heat insulation frame 50 and the cabin 60 are bonded together with the entire surface of the KH-RTV-400 high-temperature adhesive (400℃ resistant), further improving the sealing between the heat insulation frame 50 and the cabin 60, and eliminating the need to disassemble the heat insulation frame 50 during subsequent disassembly and installation, thus increasing the convenience of disassembly and installation. In this specific embodiment, the installation sequence of the antenna window 11 structure is as follows: first, the heat insulation frame 50 is pasted onto the cabin 60, and then the antenna assembly 40, the heat insulation structure 20, the radome 10, and the fasteners 30 are installed in sequence.

[0027] refer to Figure 1 and Figure 3In one specific embodiment, the first mounting part 23 is provided with a positioning post 231 protruding towards the radome 10, and the second mounting part 12 is provided with a positioning groove for matching the positioning post 231. The positioning post 231 is accommodated in the positioning groove. The positioning post 231 is provided with a mounting hole for the fastener 30 to pass through. The mounting hole is provided with an internal thread, and the diameter of the mounting hole is larger than the outer diameter of the fastener 30. During disassembly, the fastener is removed, and a disassembly fastener matching the internal thread is tightened in the positioning hole. The disassembly fastener is pulled outward, causing the heat insulation structure 20 and the radome 10 to detach together from the first receiving cavity 51. The matching of the positioning post 231 and the positioning groove facilitates the assembly of the radome 10 and the heat insulation structure 20 into a whole, facilitating quick installation and disassembly. By providing a disassembly internal thread on the positioning post 231, it is easy to use a disassembly fastener to disassemble the heat insulation structure 20 and the radome 10 as a whole.

[0028] In one specific embodiment, the nut of the fastener 30 has an external thread for connecting a signal shield, which covers the radome 10 to facilitate ground-based testing of the signal of the antenna assembly 40. Specifically, during shielding, a fastener 30 matching the external thread of the nut is connected to the nut to fix the signal shield outside the radome 10.

[0029] refer to Figure 1 In one specific embodiment, the bottom of the mounting groove 61 is also provided with a groove 62, the groove wall of the groove 62 is provided with an outlet, and the cabin 60 is provided with a channel 42 for accommodating the cable 41. The channel 42 is connected to the outlet, and the cable 41 enters the groove 62 from the outlet and is electrically connected to the antenna assembly 40.

[0030] refer to Figure 3 and Figure 4 In one specific embodiment, a gap 24 of 0.5mm to 3mm is reserved between the heat insulation body 21 and the top of the antenna assembly 40 to improve the heat insulation efficiency.

[0031] refer to Figure 1 In one specific embodiment, the antenna assembly 40 includes a mounting plate 43 and an antenna body 44 disposed on the mounting plate 43. The mounting plate 43 provides an electrical connection to the antenna body 44, and a cable 41 is electrically connected to the mounting plate 43.

[0032] In one specific embodiment, the radome 10 is made of quartz fiber reinforced silica composite material, the heat insulation body 21 is made of ceramic tile composite material or aerogel material, and the heat insulation frame 50 is made of rigid ceramic tile (CN106946579B Preparation method of lightweight rigid ceramic fiber heat insulation tile resistant to 1500℃) or composite heat protection material (CN108911760B Carbon fiber reinforced resin gradient carbonization non-ablative heat protection material and preparation method).

[0033] refer to Figure 1 and Figure 2 When tightening the fastener 30, a shim 31 is placed below the fastener 30 to prevent the fastener 30 from loosening. After tightening the fastener 30, the top of the fastener 30 is sealed with an installation plug 32. The material of the plug 32 is the same as that of the antenna window, which is modified quartz / quartz composite material.

[0034] The embodiments described above are merely illustrative of several implementations of the present invention, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these all fall within the scope of protection of the present invention. Therefore, the scope of protection of this patent should be determined by the appended claims.

Claims

1. An antenna window structure, characterized in that, The device includes an radome, a heat insulation structure, fasteners, an antenna assembly, and a heat insulation frame having a first receiving cavity inside. The cabin is provided with a mounting slot for accommodating the antenna assembly, the antenna assembly is accommodated in the mounting slot, the heat insulation frame is arranged around the mounting slot, the heat insulation frame is sealed to the cabin, the heat insulation structure and the radome are both accommodated in the first receiving cavity, the heat insulation structure is arranged close to the antenna assembly, and the radome is arranged on the side of the heat insulation structure opposite to the antenna assembly. The heat insulation structure includes a heat insulation body disposed opposite to the antenna assembly and a first mounting portion protruding from the edge of the heat insulation body. The antenna cover includes a window disposed opposite to the heat insulation body, a second mounting portion protruding from the edge of the window and disposed opposite to the first mounting portion, and a connecting portion protruding from the edge of the second mounting portion. The first mounting part abuts against the antenna assembly, the second mounting part abuts against the first mounting part, the connecting part is sealed to the heat insulation frame, and the fastener passes through the second mounting part, the first mounting part and the antenna assembly in sequence, and is fixedly connected to the cabin body, so that the antenna assembly, the heat insulation structure, the radome and the heat insulation frame are all fixed to the cabin body; The first mounting part is provided with a positioning post protruding towards the radome. The second mounting part is provided with a positioning groove for matching the positioning post. The positioning post is accommodated in the positioning groove. The positioning post is provided with a mounting hole for the fastener to pass through. The mounting hole is provided with an internal thread. The diameter of the mounting hole is larger than the outer diameter of the fastener. When disassembling, the fastener is removed, and a disassembly fastener that matches the internal thread is tightened in the mounting hole. The disassembly fastener is pulled outward, which drives the heat insulation structure and the radome to detach from the first accommodating cavity together.

2. The antenna window structure according to claim 1, characterized in that, The radome also includes a enclosure extending from the second mounting portion to the first mounting portion. The enclosure and the window form a second receiving cavity. The heat insulation body is housed in the second receiving cavity. The end of the enclosure abuts against the first mounting portion. The enclosure is engaged with the inner wall of the first receiving cavity. A settling groove is provided at the port of the first receiving cavity opposite to the cabin body. The connecting portion is engaged with the settling groove.

3. The antenna window structure according to claim 2, characterized in that, The heat insulation frame is an elastic body, the connecting part is interference-fitted with the settling tank, and the enclosure is interference-fitted with the inner wall of the first receiving cavity.

4. The antenna window structure according to claim 3, characterized in that, The thermal insulation frame is bonded to the cabin body.

5. The antenna window structure according to claim 1, characterized in that, The fastener has an external thread on its nut, which is used to connect a signal shielding component that covers the antenna cover.

6. The antenna window structure according to any one of claims 1 to 5, characterized in that, The bottom of the mounting slot is also provided with a groove, the groove wall is provided with an outlet, the cabin is provided with a channel for accommodating cables, the channel is connected to the outlet, and the cable enters the groove from the outlet and is electrically connected to the antenna assembly.

7. The antenna window structure according to any one of claims 1 to 5, characterized in that, A gap of 0.5mm to 3mm is reserved between the heat insulation body and the top of the antenna assembly.

8. The antenna window structure according to any one of claims 1 to 5, characterized in that, The radome is made of quartz fiber reinforced silica composite material; The material of the heat insulation body is a ceramic tile composite material or an aerogel material; The material of the thermal insulation frame is rigid ceramic tile or composite thermal protection material.

9. The antenna window structure according to any one of claims 1 to 5, characterized in that, The installation sequence of the antenna window structure is as follows: install the heat insulation frame, the antenna assembly, the heat insulation structure, the antenna cover, and the fasteners in sequence.

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