Segmented broadcast antenna array and configuration design method thereof

Abstract

The invention provides a sectional type broadcast antenna array and a configuration design method thereof, and belongs to the technical field of aircraft profile design, and the method comprises the steps: arranging a first group of broadcast antenna arrays at the front section of an upper wall plate at the left and right sides of a dorsal fin at the tail section of a fuselage, and arranging a second group of broadcast antenna arrays at the rear section, the antenna size of the first group of broadcast antenna array is smaller than that of the second group of broadcast antenna array, the first group of broadcast antenna array comprises a plurality of first antennas, and the second group of broadcast antenna array comprises a plurality of second antennas; calculating a first minimum interval between two adjacent first antennas and a second minimum interval between two adjacent second antennas; arranging the two groups of antennas based on the minimum spacing of the two groups of antennas, and respectively determining the number of first antennas and the number of second antennas; and setting the specific positions of the two groups of broadcast antenna arrays based on the number of the antennas and the minimum spacing. According to the scheme, the signal coverage range and the transmission efficiency of the broadcast antenna array are improved, the signal interference is reduced, and the antenna gain is improved.

Description

A segmented broadcast antenna array and its configuration design method Technical Field

[0001] This application relates to the field of aircraft shape design technology, and in particular to a segmented broadcast antenna array and its configuration design method. Background Technology

[0002] In modern avionics systems, airborne broadcast and direction-finding systems are key components for achieving specific functions, and their performance directly affects the aircraft's mission effectiveness and combat survivability. Among these, the antenna, as the front end of the system, is of paramount importance in its layout design and performance optimization, especially on aircraft platforms with limited space and complex electromagnetic environments.

[0003] Currently, traditional antenna layout schemes for implementing meter-band broadcasting and direction finding functions on aircraft platforms typically face a series of severe challenges. Due to the extremely limited space within the aircraft's structure and the need for its shape to meet stringent aerodynamic requirements, the installation location and form of the antenna are severely restricted. This often results in insufficient antenna aperture, making it difficult to meet the requirements of high-precision positioning in terms of direction finding accuracy. Secondly, the aircraft itself, as a large metallic reflector and obstructor, severely interferes with the antenna's radiation pattern, leading to blind spots or weak areas in the azimuth coverage, preventing reliable omnidirectional coverage and impacting the system's overall situational awareness capabilities. Summary of the Invention

[0004] In view of this, embodiments of this application provide a segmented broadcast antenna array and its configuration design method, which at least partially solves the problems of insufficient direction finding accuracy and limited azimuth coverage in the prior art.

[0005] This application provides a segmented broadcast antenna array configuration design method. The method includes: setting a first broadcast antenna array in the front section of the upper panel on the left and right sides of the tail section of the fuselage; setting a second broadcast antenna array in the rear section of the upper panel on the left and right sides of the tail section of the fuselage; the antenna size of the first broadcast antenna array is smaller than the antenna size of the second broadcast antenna array; the first broadcast antenna array includes multiple first antennas; and the second broadcast antenna array includes multiple second antennas. Based on the design requirement that no grating lobes appear in the radiation pattern within the array antenna scanning range, the spacing between two adjacent first antennas in the first broadcast antenna array is calculated to obtain... The first minimum spacing between two adjacent first antennas is calculated, and the second minimum spacing between two adjacent second antennas within the second group of broadcast antenna arrays is obtained. The first antennas are arranged based on the first minimum spacing, and the second antennas are arranged based on the second minimum spacing. Electromagnetic simulation is used to determine the number of first antennas and the number of second antennas that result in minimum antenna loss and maximum antenna radiation efficiency, respectively. The specific positions of the first group of broadcast antenna arrays are set based on the first minimum spacing and the number of first antennas. The specific positions of the second group of broadcast antenna arrays are also set based on the second minimum spacing and the number of second antennas.

[0006] According to a specific implementation of the embodiments of this application, setting the specific position of the first group of broadcast antenna arrays includes: determining the first baseline length of the first group of broadcast antenna arrays based on the first minimum spacing; keeping the first group of broadcast antenna arrays coplanar along the aircraft's heading and setting the first installation angle with respect to the aircraft's symmetrical plane; and setting the first minimum distance between the center of the first antenna at the forefront of the first group of broadcast antenna arrays and the intersection line of the dorsal fin and the fuselage.

[0007] According to a specific implementation of the embodiments of this application, setting the specific position of the second group of broadcast antenna arrays includes: determining the second baseline length of the second group of broadcast antenna arrays based on the second minimum spacing; keeping the second group of broadcast antenna arrays coplanar along the aircraft heading, and setting the second installation angle with the plane of symmetry of the aircraft; and setting the second minimum distance between the center of the second antenna at the foremost point of the second group of broadcast antenna arrays and the intersection line of the dorsal fin and the fuselage.

[0008] According to a specific implementation of this application, the formula for calculating the first minimum spacing between two adjacent first antennas is: d1<λ1 / (1+sinθ1), where d1 is the first minimum spacing, λ1 is the operating wavelength of the first antenna, and θ1 is the first pattern scanning angle; the formula for calculating the second minimum spacing between two adjacent second antennas is: d2<λ2 / (1+sinθ2), where d2 is the second minimum spacing, λ2 is the operating wavelength of the second antenna, and θ2 is the second pattern scanning angle.

[0009] According to a specific implementation of the embodiments of this application, the first baseline length is 320mm-325mm, the first mounting angle is 25°-25.5°, the first minimum distance is 329mm-339mm, the second baseline length is 760mm-765mm, the second mounting angle is 25°-25.5°, and the second minimum distance is 307mm-317mm.

[0010] According to a specific implementation of an embodiment of this application, the method further includes: designing the dimensions of a first cable connecting to a first antenna, wherein the diameter of the first cable is 8 mm and the minimum bending radius of the first cable is 60 mm; and designing the dimensions of a second cable connecting to a second antenna, wherein the diameter of the second cable is 12 mm.

[0011] Secondly, this embodiment also provides a segmented broadcast antenna array, designed using the segmented broadcast antenna array configuration design method described in any embodiment of the first aspect. The segmented broadcast antenna array includes a first broadcast antenna array and a second broadcast antenna array. The first broadcast antenna array is located in the front section of the upper wall panel on the left and right sides of the tail section of the fuselage, and the second broadcast antenna array is located in the rear section of the upper wall panel on the left and right sides of the tail section of the fuselage. The antenna size of the first broadcast antenna array is smaller than the antenna size of the second broadcast antenna array. The first broadcast antenna array includes five first antennas arranged in a straight line, and the second broadcast antenna array includes two second antennas arranged in a straight line.

[0012] According to a specific implementation of the present application, the body size of the first antenna is 290mm×90mm×253.4mm, the outer dimensions of the first antenna are 290mm×90mm×269.9mm, the body size of the second antenna is 430mm×90mm×541.6mm, and the dimensions of the second antenna are 520mm×100mm×557mm.

[0013] According to a specific implementation of the present application, the bottom of the first group of broadcast antenna arrays is fused to the aircraft skin through a mounting transition plate, and a feeder mounting hole is provided on the mounting transition plate at a position corresponding to the center of each first antenna.

[0014] According to one specific implementation of the present application, a support plate nut is riveted to the back of the mounting transition plate, and the bottom edge of each first antenna is threadedly connected to the support plate nut by bolts passing through the mounting transition plate.

[0015] Beneficial effects: The segmented broadcast antenna array and its configuration design method in the embodiments of this application have the following beneficial effects: 1) It solves the problem of difficult layout and installation design of electronic reconnaissance antennas that are subject to vertical polarization and horizontal polarization in the meter band. It provides a new layout configuration option for arranging the first and second segmented broadcast antenna arrays of a certain frequency band close to the surface of the aircraft body.

[0016] 2) Integrating and solidifying the antenna radiator and radome into a single unit effectively improves the overall strength of the antenna and solves the problem that the antenna array layout size is limited by the body structure.

[0017] 3) A novel broadband, high-strength, high-power capacity omnidirectional antenna was designed using a short-circuit loading method for a single antenna.

[0018] 4) To ensure that no grating lobes appear in the radiation pattern within the array antenna's scanning range, a refined electromagnetic simulation design was implemented for the antenna element spacing baseline. Simultaneously, while meeting the electronic reconnaissance operating frequency requirements, electromagnetic signal processing was achieved using the inherent configuration of the aircraft's all-metal dorsal fin, effectively reducing the antenna array's VSWR. Attached Figure Description

[0019] To more clearly illustrate the technical solutions of the embodiments of this application, the drawings used in 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.

[0020] Figure 1 is a schematic diagram of a single antenna structure of the first group of broadcast antenna arrays according to an embodiment of the present invention; Figure 2 is a schematic diagram of the installation of the first group of broadcast antenna arrays according to an embodiment of the present invention; Figure 3 is a schematic diagram of the installation transition plate of the first group of broadcast antenna arrays according to an embodiment of the present invention; Figure 4 is a schematic diagram of a single antenna structure of the second group of broadcast antenna arrays according to an embodiment of the present invention; Figure 5 is a schematic diagram of the configuration of two groups of broadcast antenna arrays according to an embodiment of the present invention.

[0021] In the diagram: 1. First broadcast antenna array; 2. Mounting transition plate; 3. Aircraft skin; 4. Antenna mounting hole; 5. Feeder mounting hole; 6. Second broadcast antenna array; 7. Aircraft dorsal fin; 8. Upper fuselage tail section panel. Detailed Implementation

[0022] The embodiments of this application will now be described in detail with reference to the accompanying drawings.

[0023] The following specific examples illustrate the implementation of this application. Those skilled in the art can easily understand other advantages and effects of this application from the content disclosed in this specification. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. This application can also be implemented or applied through other different specific embodiments, and the details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of this application. It should be noted that, in the absence of conflict, the following embodiments and features in the embodiments can be combined with each other. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0024] It should be noted that various aspects of embodiments within the scope of the appended claims are described below. It will be apparent that the aspects described herein can be embodied in a wide variety of forms, and any particular structure and / or function described herein is merely illustrative. Based on this application, those skilled in the art will understand that one aspect described herein can be implemented independently of any other aspect, and two or more of these aspects can be combined in various ways. For example, any number of aspects set forth herein can be used to implement the device and / or practice the method. Additionally, this device and / or method can be implemented using structures and / or functionalities other than one or more of the aspects set forth herein.

[0025] It should also be noted that the illustrations provided in the following embodiments are only schematic representations of the basic concept of this application. The illustrations only show the components related to this application and are not drawn according to the number, shape and size of the components in actual implementation. In actual implementation, the form, quantity and proportion of each component can be arbitrarily changed, and the layout of the components may also be more complex.

[0026] Furthermore, specific details are provided in the following description to facilitate a thorough understanding of the examples. However, those skilled in the art will understand that the described aspects can be practiced without these specific details.

[0027] In a first aspect, embodiments of this application provide a segmented broadcast antenna array configuration design method. The method includes: setting a first broadcast antenna array 1 at the front section of the upper wall panel on the left and right sides of the tail section of the fuselage; setting a second broadcast antenna array 6 at the rear section of the upper wall panel on the left and right sides of the tail section of the fuselage; the antenna size of the first broadcast antenna array 1 is smaller than the antenna size of the second broadcast antenna array 6; the first broadcast antenna array 1 includes multiple first antennas; and the second broadcast antenna array 6 includes multiple second antennas; based on the design requirement that no grating lobes appear in the radiation pattern within the scanning range of the array antennas, the spacing between two adjacent first antennas in the first broadcast antenna array 1 is calculated. The first minimum spacing between two adjacent first antennas is calculated, and the spacing between two adjacent second antennas within the second group of broadcast antenna array 6 is calculated to obtain the second minimum spacing between two adjacent second antennas. The first antennas are arranged based on the first minimum spacing, and the second antennas are arranged based on the second minimum spacing. Electromagnetic simulation calculations are used to determine the number of first antennas and the number of second antennas when the antenna loss is minimized and the antenna radiation efficiency is maximized, respectively. The specific positions of the first group of broadcast antenna array 1 and the second group of broadcast antenna array 6 are set based on the first minimum spacing and the number of first antennas.

[0028] In this embodiment, the solution comprehensively considers multidisciplinary constraints such as the aircraft's aerodynamic layout, electromagnetic compatibility, power supply system compatibility, and maintenance convenience. Through an integrated structural design, it successfully overcomes the technical challenges of insufficient direction-finding accuracy and limited azimuth coverage under the constraints of the airframe's structural space. Specifically, this invention employs an optimized spatial arrangement strategy and electromagnetic environment adaptation technology to ensure that the system possesses excellent direction-finding performance and omnidirectional coverage within a predetermined frequency band. This design not only meets the basic requirements for high-precision direction finding in the meter-wave band but also achieves core functions such as rapid scanning, precise positioning, and efficient transmission, providing an effective solution for improving the overall performance of the aircraft's payload system. This innovative design fully embodies the design concept of multidisciplinary integration, significantly improving the aircraft's ease of use and maintenance, as well as its environmental adaptability, while ensuring the system's technical specifications.

[0029] Furthermore, setting the specific position of the first group of broadcast antenna array 1 includes: determining the first baseline length of the first group of broadcast antenna array 1 based on the first minimum spacing; keeping the first group of broadcast antenna array 1 coplanar along the aircraft's heading and setting the first installation angle with respect to the aircraft's symmetrical plane; and setting the first minimum distance between the center of the first antenna at the forefront of the first group of broadcast antenna array 1 and the intersection line of the dorsal fin and the fuselage.

[0030] Furthermore, setting the specific position of the second group of broadcast antenna array 6 includes: determining the second baseline length of the second group of broadcast antenna array 6 based on the second minimum spacing; keeping the second group of broadcast antenna array 6 coplanar along the aircraft's heading and setting the second installation angle with respect to the aircraft's symmetrical plane; and setting the second minimum distance between the center of the second antenna at the foremost point of the second group of broadcast antenna array 6 and the intersection line of the dorsal fin and the fuselage.

[0031] Furthermore, the formula for calculating the first minimum spacing between two adjacent first antennas is: d1<λ1 / (1+sinθ1), where d1 is the first minimum spacing, λ1 is the operating wavelength of the first antenna, and θ1 is the first pattern scanning angle; the formula for calculating the second minimum spacing between two adjacent second antennas is: d2<λ2 / (1+sinθ2), where d2 is the second minimum spacing, λ2 is the operating wavelength of the second antenna, and θ2 is the second pattern scanning angle.

[0032] Furthermore, the first baseline length is 320mm-325mm, the first mounting angle is 25°-25.5°, the first minimum distance is 329mm-339mm, the second baseline length is 760mm-765mm, the second mounting angle is 25°-25.5°, and the second minimum distance is 307mm-317mm.

[0033] In one embodiment, the method further includes: designing the dimensions of a first cable connecting to a first antenna, wherein the diameter of the first cable is 8 mm and the minimum bending radius of the first cable is 60 mm; and designing the dimensions of a second cable connecting to a second antenna, wherein the diameter of the second cable is 12 mm.

[0034] The following is a detailed explanation of the segmented broadcast antenna array configuration design method of this application using a specific example.

[0035] According to the antenna installation requirements of the mission system, two sets of segmented broadcast antenna arrays of a certain frequency band are installed on the left and right sides of the stringer from 50a to 52a on the upper wall of the tail section of a certain aircraft fuselage. The configuration and installation diagram of the meter-wave electronic reconnaissance antenna is shown in Figure 1, which specifically includes the following: (1) Design of the first set of broadcast antenna array 1 S11: The array structure of the blade antenna is adopted, and the single antenna adopts the short-circuit loading method to design a new type of broadband high-intensity high-power capacity omnidirectional antenna. The body size of a single antenna is 290mm×90mm×253.4mm; the external dimensions are 290mm×90mm×269.9mm (as shown in Figure 1).

[0036] S12: Adding a series of through holes to the antenna radiator effectively reduces the antenna weight, and integrating the antenna radiator and radome into a single solidified package effectively improves the overall strength of the antenna.

[0037] S13: To ensure that no grating lobes appear in the radiation pattern within the array antenna scanning range, the antenna element spacing should satisfy the following formula: d1 < λ1 / (1 + sinθ1). Where λ1 is the operating wavelength and θ1 is the radiation pattern scanning angle. For example, according to the formula, when the beam is scanned to 45°, the element spacing for 2XX MHz without grating lobes should be ≤ d1 / λ1 / (1 + sinθ1). i1 mm, based on the information listed in Table 1, and after itemized calculations, a comprehensive analysis and statistical minimum value d∈(d 11 .....d ij Therefore, in a segmented first group of broadcast antenna array 1 for a certain frequency band, the spacing between individual antenna elements without grating lobe elements should be ≤338mm.

[0038] Table 1. Excitation phase values ​​of each unit before and after correction.

[0039] S14: In order to improve the antenna installation gain and to meet the special mission system working functions, the antenna needs to be arrayed. According to electromagnetic simulation, when the first group of broadcast antenna array 1 in a certain frequency band is a 1×5 antenna array, the antenna loss is small and the antenna radiation efficiency is the largest.

[0040] S15: The position of the first group of broadcast antenna array 1 in a certain frequency band is adjusted to the front section of the upper wall panel on the left and right sides of the tail section of the fuselage. The baseline range of 320 (-0 to +5) mm remains unchanged. The baseline length determined in this step is less than 338 mm in step S12. Therefore, no grid beam appears in the antenna array and the overall electrical performance of the antenna is not affected. S16: The single-sided antenna is kept coplanar along the flight direction of the aircraft and maintains an installation angle of 25° (-0° to +0.5°) with the plane of symmetry of the aircraft. The minimum distance between the center of the antenna at the front of the single-sided antenna and the intersection line of the tail fin and the fuselage is about 334 mm (along the spanwise direction). The configuration of the first group of broadcast antenna array 1 is shown in Figure 2.

[0041] S17: The cable used to connect the antenna has a diameter of 8mm (5 on each side, 10 in total), a minimum bending radius of 60mm, and enters the airtight chamber through an airtight guide sleeve. The bottom of the antenna has reserved space for cable routing to facilitate cable installation, maintenance and testing.

[0042] S18: To ensure installation accuracy, an antenna mounting transition plate 2 needs to be designed for the first group of broadcast antenna arrays 1. The antenna mounting transition plate 2 is used for integration design with the aircraft skin 3. First, ensure that the minimum accuracy of the antenna baseline is controlled within ±0.1mm. At the same time, an antenna mounting bracket nut (the position of the antenna mounting hole 4) is reserved on the back of the antenna mounting transition plate 2 to enable quick external disassembly of the antenna. Feeder mounting holes 5 are pre-drilled on the antenna mounting transition plate 2 according to the cable laying installation requirements to improve the efficiency of the modification construction (as shown in Figure 3).

[0043] (2) The main steps of the second group of broadcast antenna array 6 configuration of a certain frequency band segmented second group of broadcast antenna array 6 are the same as those of the first group of broadcast antenna array 1 configuration of a certain frequency band. The main difference is: S21: The body size of a single antenna of the second group of broadcast antenna array 6 is 430mm×90mm×541.6mm; the external size is 520mm×100mm×557mm (as shown in Figure 4).

[0044] S22: To ensure that no grating lobes appear in the radiation pattern within the array antenna scanning range, the antenna element spacing should satisfy the following formula: d2 < λ2 / (1 + sinθ2). Where λ2 is the operating wavelength and θ2 is the radiation pattern scanning angle. Referring to step S13, the baseline of a single antenna without grating lobes should be ≤780mm.

[0045] S23: The antennas need to be arrayed. According to electromagnetic simulation, when the second group of broadcast antennas in the segmented type of a certain frequency band is a 1×2 antenna array, the antenna loss is small and the antenna radiation efficiency is the greatest.

[0046] S24: The arrangement position of the second group of broadcast antenna array 6 in a certain frequency band is adjusted to the rear section of the upper wall panel on the left and right sides of the tail section of the fuselage, with the baseline range of 760 (-0 to +5) mm remaining unchanged; the single antenna is kept coplanar along the aircraft heading and maintains an installation angle of 25° with the aircraft's plane of symmetry; the minimum distance between the antenna and the intersection line of the tail fin and the fuselage is about 312 mm (along the spanwise direction), as shown in Figure 5.

[0047] S25: The cable used to connect the antenna is about 12 mm in diameter (2 on each side, 4 in total). The cable enters the airtight chamber through an airtight sleeve.

[0048] In this embodiment, based on the overall antenna layout, mission requirements, and electromagnetic compatibility design requirements of an aircraft, two sets of segmented broadcast antenna arrays for a certain frequency band are installed on both sides of the dorsal fin of the upper fuselage section 8. This forms a special antenna array configuration of "five small antennas in front and two large antennas in the rear" on each side. The antennas have the function of receiving and transmitting electromagnetic signals in a certain meter-wave frequency band. The antennas are left and right mirror symmetrical. Through precise installation control, the antennas are arranged on both sides of the aircraft's dorsal fin 7, and the metal structure of the dorsal fin fuselage is used for electromagnetic wave reflection, thereby reducing the antenna standing wave ratio and effectively controlling the formation of active standing waves, thus improving the antenna gain. At the same time, through aerodynamic characteristic CFD simulation, this configuration effectively controls the airflow separation generated by the front antenna array on the rear antenna array, minimizing the vibration impact of the Karman vortex on the rear antenna.

[0049] Secondly, this embodiment also provides a segmented broadcast antenna array, designed using the segmented broadcast antenna array configuration design method described in any embodiment of the first aspect. The segmented broadcast antenna array includes a first broadcast antenna array 1 and a second broadcast antenna array 6. The first broadcast antenna array 1 is located in the front section of the upper wall panel on the left and right sides of the tail section of the fuselage, and the second broadcast antenna array 6 is located in the rear section of the upper wall panel on the left and right sides of the tail section of the fuselage. The antenna size of the first broadcast antenna array 1 is smaller than the antenna size of the second broadcast antenna array 6. The first broadcast antenna array 1 includes five first antennas arranged in a straight line, and the second broadcast antenna array includes two second antennas arranged in a straight line.

[0050] Furthermore, the body size of the first antenna is 290mm×90mm×253.4mm, the outer dimensions of the first antenna are 290mm×90mm×269.9mm, the body size of the second antenna is 430mm×90mm×541.6mm, and the dimensions of the second antenna are 520mm×100mm×557mm.

[0051] Furthermore, the bottom of the first group of broadcast antenna array 1 is fused to the aircraft skin 3 through the mounting transition plate 2, and the mounting transition plate 2 is provided with feeder mounting holes 5 at the positions corresponding to the center of each first antenna.

[0052] Furthermore, a support plate nut is riveted to the back of the mounting transition plate 2, and the bottom edge of each first line is threadedly connected to the support plate nut by bolts passing through the mounting transition plate 2.

[0053] The embodiments provided by this invention involve installing two sets of segmented broadcast antenna arrays for a specific frequency band on both sides of the dorsal fin on the upper wall panel 8 of the tail section of an aircraft fuselage. This forms a special antenna array configuration of "five small antennas in front and two large antennas in the rear" on each side. These antennas are capable of receiving and transmitting electromagnetic signals in a specific meter-wave band. The antennas are mirror-symmetrical on the left and right sides. Through precise installation control, the antennas are positioned on both sides of the aircraft's dorsal fin 7, and electromagnetic waves are reflected using the metal structure of the dorsal fin fuselage, thereby reducing the antenna's standing wave ratio (VSWR) and effectively controlling the formation of active VSWR, thus improving antenna gain. Simultaneously, this configuration, through aerodynamic CFD simulation, effectively controls the airflow separation generated by the front antenna array on the rear antenna array, minimizing the vibration impact of Karman vortices on the rear antenna. This layout configuration adopts an overall integrated design, resolving the contradiction of insufficient direction-finding accuracy under the constraint of limited fuselage structural dimensions. Optimized spatial arrangement strategies and electromagnetic environment adaptation technology ensure that the system possesses excellent direction-finding performance and omnidirectional coverage within the predetermined frequency band. A novel layout option is provided for arranging a segmented broadcast antenna array configuration on the surface of an aircraft fuselage.

[0054] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A segmented broadcast antenna array configuration design method, characterized in that, The method includes: setting a first set of broadcast antenna arrays (1) on the front section of the upper wall panel on the left and right sides of the tail section of the fuselage, and setting a second set of broadcast antenna arrays (6) on the rear section of the upper wall panel on the left and right sides of the tail section of the fuselage, wherein the antenna size of the first set of broadcast antenna arrays (1) is smaller than the antenna size of the second set of broadcast antenna arrays (6), the first set of broadcast antenna arrays (1) includes multiple first antennas, and the second set of broadcast antenna arrays (6) includes multiple second antennas; according to the design requirement that no grid lobes appear in the radiation pattern within the scanning range of the array antennas, the spacing between two adjacent first antennas in the first set of broadcast antenna arrays (1) is calculated to obtain the spacing between two adjacent first antennas. The first minimum spacing of the antennas is calculated, and the spacing between two adjacent second antennas in the second group of broadcast antenna arrays (6) is obtained. The first antenna is arranged based on the first minimum spacing, and the second antenna is arranged based on the second minimum spacing. Electromagnetic simulation calculation is used to determine the number of first antennas and the number of second antennas when the antenna loss is minimized and the antenna radiation efficiency is maximized, respectively. The specific position of the first group of broadcast antenna arrays (1) is set based on the first minimum spacing and the number of first antennas. The specific position of the second group of broadcast antenna arrays (6) is set based on the second minimum spacing and the number of second antennas.

2. The segmented broadcast antenna array configuration design method according to claim 1, characterized in that, The specific position setting of the first group of broadcast antenna arrays (1) includes: determining the first baseline length of the first group of broadcast antenna arrays (1) based on the first minimum spacing; keeping the first group of broadcast antenna arrays (1) coplanar along the aircraft heading and setting the first installation angle with the plane of symmetry of the aircraft; setting the first minimum distance between the center of the first antenna at the foremost point of the first group of broadcast antenna arrays (1) and the intersection line of the dorsal fin and the fuselage.

3. The segmented broadcast antenna array configuration design method according to claim 2, characterized in that, The specific position setting of the second group of broadcast antenna arrays (6) includes: determining the second baseline length of the second group of broadcast antenna arrays (6) based on the second minimum spacing; keeping the second group of broadcast antenna arrays (6) coplanar along the aircraft heading and setting the second installation angle with the plane of symmetry of the aircraft; setting the second minimum distance between the center of the second antenna at the foremost point of the second group of broadcast antenna arrays (6) and the intersection line of the dorsal fin and the fuselage.

4. The segmented broadcast antenna array configuration design method according to claim 1, characterized in that, The formula for calculating the first minimum spacing between two adjacent first antennas is: d1<λ1 / (1+sinθ1), where d1 is the first minimum spacing, λ1 is the operating wavelength of the first antenna, and θ1 is the first pattern scanning angle; the formula for calculating the second minimum spacing between two adjacent second antennas is: d2<λ2 / (1+sinθ2), where d2 is the second minimum spacing, λ2 is the operating wavelength of the second antenna, and θ2 is the second pattern scanning angle.

5. The segmented broadcast antenna array configuration design method according to claim 3, characterized in that, The first baseline length is 320mm-325mm, the first mounting angle is 25°-25.5°, and the first minimum distance is 329mm-339mm. The second baseline length is 760mm-765mm, the second mounting angle is 25°-25.5°, and the second minimum distance is 307mm-317mm.

6. The segmented broadcast antenna array configuration design method according to claim 1, characterized in that, The method further includes: designing the dimensions of a first cable connecting to a first antenna, wherein the diameter of the first cable is 8 mm and the minimum bending radius of the first cable is 60 mm; and designing the dimensions of a second cable connecting to a second antenna, wherein the diameter of the second cable is 12 mm.

7. A segmented broadcast antenna array, designed using the segmented broadcast antenna array configuration design method as described in any one of claims 1-6, characterized in that, The segmented broadcast antenna array includes a first broadcast antenna array (1) and a second broadcast antenna array (6). The first broadcast antenna array (1) is located on the front section of the upper wall panel on the left and right sides of the tail section of the fuselage. The second broadcast antenna array (6) is located on the rear section of the upper wall panel on the left and right sides of the tail section of the fuselage. The antenna size of the first broadcast antenna array (1) is smaller than the antenna size of the second broadcast antenna array (6). The first broadcast antenna array (1) includes five first antennas arranged in a straight line. The second broadcast antenna array includes two second antennas arranged in a straight line.

8. The segmented broadcast antenna array according to claim 7, characterized in that, The body dimensions of the first antenna are 290mm×90mm×253.4mm, and the outer dimensions of the first antenna are 290mm×90mm×269.9mm. The body dimensions of the second antenna are 430mm×90mm×541.6mm, and the outer dimensions of the second antenna are 520mm×100mm×557mm.

9. The segmented broadcast antenna array according to claim 7, characterized in that, The bottom of the first group of broadcast antenna array (1) is fused to the aircraft skin (3) through the mounting transition plate (2). The mounting transition plate (2) is provided with feeder mounting holes (5) at the positions corresponding to the center of each first antenna.

10. The segmented broadcast antenna array according to claim 9, characterized in that, The back of the mounting transition plate (2) is riveted with a support plate nut, and the bottom edge of each first line is threaded through the mounting transition plate (2) and connected to the support plate nut by bolts.

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