A cellular active phased array front-end structure

Abstract

The present invention relates to the field of electronic device array structure design, and specifically to a cellular active phased array front-end structure, comprising: a front-end skeleton, an antenna array, and a feed network. The front-end skeleton is provided with multiple through cavities and multiple blind cavities, wherein power amplifier components are installed in the through cavities, and the blind cavities are filled with phase change energy storage materials. The blind cavities are distributed around the through cavities to separate adjacent through cavities, and a thermal pad is provided on the heat dissipation surface of the power amplifier components. The antenna array is mounted on the upper end surface of the front-end skeleton, and the antenna array and the power amplifier components are connected via a feed connector. The feed network is mounted on the lower end surface of the front-end skeleton, and the feed network and the power amplifier components are connected via a feed connector. This device reduces the operating temperature of the power amplifier components while achieving a lightweight structure and improving space utilization.

Description

Technical Field

[0001] The present invention relates to the field of electronic equipment array structure design, and in particular to a cellular active phased array front-end structure. Background Art

[0002] The active phased array (APA) system used on certain aerospace electronic equipment is cylindrical in shape. Unlike APAs on other platforms (ships, aircraft, and vehicles), this cylindrical cross-section typically has a smaller diameter due to limitations in form, platform size, resources, and operating environments. This imposes stringent requirements on volume, weight, structural rigidity and strength, reliability, heat dissipation, maintenance, storage, and environmental adaptability. Furthermore, with the increasing mission requirements of aerospace electronic equipment in recent years, the transmit power density of APAs has continued to increase, significantly increasing the requirements for structural vibration and shock resistance. Improving the structural integration density and compactness of the array surface is a key technical approach to addressing these issues. To maximize space utilization and improve structural strength and rigidity, structural designs often adopt an integrated design. For example, functional units such as the antenna, power amplifier assembly, feed network, and power supply are integrated onto a single substrate through welding or sintering. This reduces mechanical interfaces, increases integration, and significantly reduces size. However, this can significantly increase development and maintenance costs. Appropriate structural design can achieve a certain degree of integration while also improving maintainability.

[0003] The front end of an active phased array is typically designed according to a subarray structure, which is used to assemble the larger array. Common subarray formats include brick, blade, and tile. The brick subarray structure integrates the front end of the array into square subarrays, such as 4×4 channels and 8×8 channels. These subarrays are blindly connected and powered, and then installed on a large frame to form the entire array. The blade subarray structure integrates the front end of the array into long strip subarrays, such as 2×8 channels and 2×32 channels. These subarrays are blindly connected and powered, and then installed on a large frame to form the entire array. The tile subarray structure layers the power amplifier components, feed network, and power supply into a tile structure. These subarrays are then stacked layer by layer to form the subarrays, which are then assembled on a large frame to form the entire array.

[0004] Conventional brick-type, blade-type, and tile-type active front-end subarrays in the existing technology mount the power amplifier components on the heat dissipation module and heat dissipation plate, and then blindly fix them on the front-end skeleton. The skeleton structure is split, the mechanical connection interface increases, the number of structural parts increases, the structural integrity and integration are reduced, and part of the space and weight are occupied by structural parts, connecting fasteners, full-size guide and positioning parts, guide rails, and sealing structures. Since the subarray is large in size and is square or long in shape, it has poor adaptability to the cylindrical structure shape, reducing the utilization rate of limited space. Conventional brick-type, blade-type, and tile-type active phased array front-end subarrays have high channel integration and a large number of blind-plugging channels, but the front-end skeleton has a large span. To ensure rigidity, the supporting structure and guide rails are large in size. In particular, the blade-type subarray has a large span in one direction, and it is usually impossible to add beams, columns and other reinforcement structures at a small interval, resulting in poor integrity of the main structural parts, which is not conducive to improving strength and rigidity, and is not conducive to miniaturization and lightweight design. Due to the large size of the subarray and the large number of blind-plugging channels, the front-end structure of the conventional array mostly uses steel guide locating pins to assemble on the subarray module, and it is necessary to set guide locating mounting holes or even mounting flanges on the relevant structural parts. The structure is large in size, heavy, and has low space utilization, which increases the assembly links and reduces the accuracy and reliability. Conventional brick-type, blade-type, and tile-type active phased arrays have large size and large number of blind-plugging channels. When designing the front-end subarray of the array control system, the power amplifier components are installed on the heat dissipation module and the heat dissipation cold plate and plugged in and out together. The heat dissipation units between the subarrays are relatively independent, and the assembly connection interface is increased, the thermal resistance is increased and the temperature uniformity is insufficient. There is also a method of pressing the power amplifier components to the heat dissipation module through a locking mechanism, but the locking mechanism is relatively complex and large in size, which is not conducive to small and lightweight design. In order to reduce the contact thermal resistance, thermal interface materials such as silicone grease are usually applied to the locking surface, which results in redundant materials. The sealing structure usually requires a certain width to meet the installation space required for the U-shaped groove of the sealing strip on the end face. Due to the need for the installation of thermal conductivity and phase change energy storage materials, it is impossible to design local thick walls, which will greatly increase the weight of the front-end skeleton. The increase in wall thickness also compresses the installation space of the phase change energy storage material, reducing the heat storage and heat dissipation capacity. In summary, the existing technology mainly has problems with structural integrity, compactness, integration, and space utilization, resulting in large size and weight of the structure, which in turn leads to complex structure.

[0005] Therefore, it is necessary to provide a cellular active phased array front-end structure to solve the above problems. Summary of the Invention

[0006] The present invention provides a cellular active phased array front-end structure to solve the existing problems.

[0007] A cellular active phased array front-end structure of the present invention adopts the following technical solutions, including:

[0008] The front-end skeleton is provided with a plurality of through cavities and a plurality of blind cavities. The power amplifier components are installed in the through cavities, and the blind cavities are filled with phase change energy storage materials. The blind cavities are distributed around the through cavities to separate adjacent through cavities. A thermal pad is provided on the heat dissipation surface of the power amplifier components.

[0009] The antenna array is mounted on the upper end surface of the front frame and is connected to the power amplifier assembly via a feed connector;

[0010] And a feeding network is installed on the lower end surface of the front-end frame and is connected to the power amplifier component through a feeding connector.

[0011] Preferably, the front-end skeleton comprises:

[0012] The upper half frame and the lower half frame are connected by screws, wherein the through cavity passes through the upper half frame and the lower half frame, and the blind cavity is provided on the opposite sides of the upper half frame and the lower half frame;

[0013] and a sealing bracket, which is arranged between the opposite surfaces of the upper half frame and the lower half frame, and the sealing bracket is arranged to penetrate the corresponding position of the through cavity, and the sealing bracket is provided with a mounting protrusion for cooperating with the blind cavity, and sealing strips are provided between the mounting protrusion and the blind cavity, and between the through cavity and the through opening;

[0014] A closed cavity is formed between each blind cavity and the mounting protrusion of the sealing bracket, and the phase change energy storage material is filled in the closed cavity.

[0015] Preferably, the lower half frame has a sunken surface, the sealing bracket is arranged in the sunken surface, and an installation gap for installing the sealing strip is formed between the outer peripheral surface of the sealing bracket and the inner wall surface of the lower half frame, between the through-hole of the sealing bracket and the cavity wall of the through cavity, and between the installation protrusion of the sealing bracket and the cavity wall of the blind cavity.

[0016] Preferably, the antenna array is connected to the top of the upper half frame through an antenna mounting plate; and the feed network is connected to the bottom of the lower half frame through an adapter plate.

[0017] Preferably, the power amplifier assembly includes: a power amplifier body, a first feed port is provided on the top of which, and a second feed port is provided on the bottom of which, wherein the power amplifier body is arranged in the through cavity through a guiding and positioning structure, and the first feed port is connected to the antenna array through a feed connector, and the second feed port is connected to the feed network through the feed connector.

[0018] Preferably, the guiding and positioning structure includes:

[0019] The guide boss is provided on the opposite side surface close to the top of the power amplifier body;

[0020] A guide groove is provided on the opposite surface of the through cavity, and the guide boss matches the guide groove;

[0021] A wedge-shaped block is provided on one side of the bottom of the power amplifier body;

[0022] And an oblique block is arranged on the adapter plate. The oblique block and the corresponding wedge-shaped square block of the power amplifier body cooperate to guide the power amplifier body so that the wedge-shaped square block enters the square hole opened on the adapter plate.

[0023] Preferably, a mounting flange is provided on one side of the top of the power amplifier body, and the mounting flange is provided in a groove opened in the upper half frame on one side of the through cavity, and the mounting flange is connected to the groove of the upper half frame by screws.

[0024] Preferably, the side of the power amplifier body facing away from the mounting flange is a heat dissipation surface, a thermal pad is provided on the heat dissipation surface, and the heat dissipation surfaces of all the power amplifier bodies are located on the same side of the power amplifier body.

[0025] Preferably, the front end frame is made of aluminum alloy.

[0026] Preferably, the phase change energy storage material is expanded graphite impregnated with paraffin.

[0027] The beneficial effects of the present invention are:

[0028] 1. Since the blind cavities of the front-end skeleton are distributed around the through cavity to separate adjacent through cavities, the inner cavity of the front-end skeleton forms a honeycomb structure. The power amplifier component is arranged in the through cavity of the front-end skeleton. The power amplifier component transfers heat to the cavity wall of the front-end skeleton through the thermal conductive pad, and transfers heat to the phase change energy storage material through the cavity wall, thereby reducing the operating temperature of the power amplifier component, with small thermal resistance and good temperature control effect.

[0029] 2. A guide positioning structure that is integrally processed with the power amplifier body is adopted, that is, the positioning pins are used to realize one-time positioning of the lower half skeleton and the feed network. When the power amplifier components are installed, the bottom is guided by the wedge-shaped square and the oblique block on the adapter plate, while the top is guided by the guide protrusion and the guide groove on the front skeleton. After entering the effective positioning and matching section, the wedge-shaped square enters the square hole, and the guide protrusion completely enters the guide groove to realize upper and lower positioning, avoiding the use of guide pins and pin screw structures for assembly and positioning, reducing assembly and matching links, and due to the integral processing, it has small size, high precision, and stable and reliable guiding and positioning.

[0030] 3. A sealing bracket is used in conjunction with the sunken surface and inner wall of the lower half frame to form a sealing groove. After the sealing strip is installed, the phase change energy storage material can be sealed, which meets the sealing requirements while greatly reducing the thickness of the front-end frame cavity wall, significantly improving the degree of lightweighting and increasing space utilization. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0032] Figure 1 This is a schematic diagram of the front-end structure of a cellular active phased array of the present invention;

[0033] Figure 2 It is a structural diagram of the front end skeleton of the present invention;

[0034] Figure 3 is a schematic diagram of the guide and positioning structure of the present invention;

[0035] Figure 4 It is a schematic diagram of the guiding and positioning matching process of the present invention;

[0036] Figure 5 It is a schematic diagram of heat conduction and heat dissipation from the power amplifier component to the thermal pad to the front frame of the present invention;

[0037] Figure 6 It is an exploded view of the front end frame of the present invention.

[0038] In the figure: 1. Antenna array; 1-1. Antenna mounting plate; 2. Front-end skeleton; 2-1. Upper skeleton; 2-2. Lower skeleton; 2-3. Through cavity; 2-4. Blind cavity; 2-5. Cavity wall; 2-6. Guide groove; 2-7. Pin hole; 2-8. Sunken surface; 2-9. Inner wall; 3. Power amplifier assembly; 3-1. Guide protrusion; 3-2. Wedge-shaped block; 3-3. Heat dissipation surface; 3-4. Upper feed port; 3-5. Lower feed port; 3-6. Disassembly process hole; 3-7. Mounting flange; 4. Phase change energy storage material; 5. Thermal conductive pad; 6. Sealing bracket; 7. Sealing strip; 8. Feed network; 8-1. Feed network adapter board; 8-2. Bevel block; 8-3. Square hole; 9. Positioning pin; 10. Feed connector. DETAILED DESCRIPTION

[0039] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0040] An embodiment of a cellular active phased array front-end structure of the present invention is as follows: Figure 1As shown, it includes: a front-end skeleton 2, an antenna array 1, and a feed network 8; the front-end skeleton 2 is provided with a plurality of through cavities 2-3 and a plurality of blind cavities 2-4, wherein the through cavities 2-3 are provided with power amplifier components 3, and the blind cavities 2-4 are filled with phase change energy storage materials 4, wherein the blind cavities 2-4 are distributed around the through cavities 2-3 to separate adjacent through cavities 2-3; the antenna array 1 is installed on the upper end face of the front-end skeleton 2, and the antenna array 1 and the power amplifier components 3 are connected through a feed connector 10; the feed network 8 is installed on the lower end face of the front-end skeleton 2, and the feed network 8 and the power amplifier components 3 are connected through a feed connector 10, realizing blind plug interconnection of the power amplifier components 3 with the antenna array 1 and the feed network 8 respectively. Among them, the front-end skeleton 2, the antenna array 1, and the feed network 8 are positioned by pins and pin holes, and the feed connectors 10 are all floating connectors, which together constitute the front-end blind plug feeding system of the active phased array.

[0041] like Figure 2 and Figure 3 As shown, since a small amount of liquid will precipitate after the phase change energy storage material is liquefied by heat, and will flow to the outside of the device to produce excess, it is necessary to seal the blind cavity of the front-end skeleton after filling the phase change energy storage material. Therefore, the front-end skeleton 2 in this embodiment includes: an upper skeleton 2-1, a lower skeleton 2-2 and a sealing bracket 6. The upper skeleton 2-1 and the lower skeleton 2-2 are connected by screws. The cavity layout of the upper skeleton 2-1 and the lower skeleton 2-2 is similar to a honeycomb structure. The blind cavity 2-4 is distributed around the through cavity 2-3, and the cavity walls 2-5 are interconnected. The structural integrity and rigidity are good, and the cavity walls 2-5 have good thermal conductivity. Among them, the through cavity 2-3 passes through the upper skeleton 2-1 and the lower skeleton 2-2, and the blind cavity 2-4 is set on the opposite sides of the upper skeleton 2-1 and the lower skeleton 2-2; as shown Figure 6 As shown, the sealing bracket 6 is arranged between the opposite surfaces of the upper half frame 2-1 and the lower half frame 2-2, and the sealing bracket 6 is arranged in a through-hole at the corresponding position of the through cavity 2-3. The sealing bracket 6 is provided with a mounting protrusion for cooperating with the blind cavity 2-4, and a sealing strip 7 is provided between the mounting protrusion and the blind cavity 2-4, and between the through cavity 2-3 and the through opening; wherein, as Figure 1 As shown, a closed cavity is formed between each blind cavity 2-4 and the mounting protrusion of the sealing bracket 6, and the phase change energy storage material 4 is filled in the closed cavity. In this embodiment, the front end skeleton 2 is made of 6061 aluminum alloy material; the phase change energy storage material 4 is made of expanded graphite impregnated with paraffin.

[0042] like Figure 6 As shown, the lower half skeleton 2-2 has a sunken surface 2-8, the sealing bracket 6 is arranged in the sunken surface 2-8, and an installation gap for installing the sealing strip 7 is formed between the outer peripheral surface of the sealing bracket 6 and the inner wall surface 2-9 of the lower half skeleton 2-2, between the through-opening of the sealing bracket 6 and the cavity wall 2-5 of the through cavity 2-3, and between the installation protrusion of the sealing bracket 6 and the cavity wall 2-5 of the blind cavity 2-4.

[0043] like Figure 1 and Figure 3 As shown, the antenna array 1 is connected to the top of the upper skeleton 2-1 through the antenna mounting plate 1-1, that is, the antenna mounting plate 1-1 and the antenna array 1 are positioned and connected by the positioning pins 9 and the pin holes; the feed network 8 is connected to the bottom of the lower skeleton 2-2 through the adapter plate 8-1, that is, the adapter plate 8-1 and the feed network 8 are positioned and connected by the positioning pins 9 and the pin holes.

[0044] like Figure 3 As shown, the power amplifier assembly 3 includes: a power amplifier body, a first feed port 3-4 is provided on the top of the power amplifier body, and a second feed port 3-5 is provided on the bottom of the power amplifier body, wherein the power amplifier body is provided in the through cavity 2-3 through a guide positioning structure, and the first feed port 3-4 is connected to the antenna array 1 through a feed connector 10, and the second feed port 3-5 is connected to the feed network 8 through the feed connector 10. Specifically, the guide positioning structure includes: a guide boss 3-1, a guide groove 2-6, a wedge-shaped block 3-2 and a guide groove 2-6. And the inclined block 8-2, the guide boss 3-1 is set on the opposite side near the top of the power amplifier body; the guide groove 2-6 is opened on the opposite side of the through cavity 2-3, and the guide boss 3-1 matches the guide groove 2-6; the wedge-shaped square 3-2 is set on the bottom side of the power amplifier body; the inclined block 8-2 is set on the adapter plate 8-1, and the inclined block 8-2 and the corresponding wedge-shaped square 3-2 of the power amplifier body cooperate to guide the power amplifier body so that the wedge-shaped square 3-2 enters the square hole 8-3 opened on the adapter plate 8-1. Figure 3 As shown, a mounting flange 3-7 is provided on one side of the top of the power amplifier body, and a disassembly process hole 3-6 is provided on the mounting flange 3-7. The mounting flange 3-7 is fixed to the groove provided on the upper half frame 2-1 on one side of the through cavity 2-3 by screws. Figure 4 and Figure 5 As shown, the side of the power amplifier body away from the mounting flange 3-7 is the heat dissipation surface 3-3, on which a thermal pad 5 is provided, and the heat dissipation surfaces 3-3 of all power amplifier bodies are located on the same side.

[0045] Among them, Figure 4As shown, the guiding and positioning matching process of the power amplifier component 3 is as follows: ① the non-heat dissipation surface on the right side of the power amplifier component 3 is attached to the wall and enters the through cavity 2-3 of the front frame 2 → ② the guiding bosses 3-1 on both sides of the top of the power amplifier component 3 are in contact with the guiding grooves 2-6 on the upper end of the inner wall of the through cavity 2-3 of the front frame 2, and at the same time, the chamfered wedge-shaped block 3-2 at the bottom is in contact with the inclined block 8-2 on the adapter plate 8-1 → ③ continue to press down the power amplifier component 3, and under the guiding action of the inclined surface of the inclined block 8-2, the power amplifier component 3 moves downward and moves to the left, and the thermal pad 5 mounted on the heat dissipation surface 3-3 gradually approaches and contacts the cavity wall 2-5 of the front frame 2, and then undergoes extrusion and creep deformation → ④ when the guide As the boss 3-1 contacts the guide groove 2-6 on the front frame 2, the wedge-shaped block 3-2 at the bottom of the power amplifier body enters the square hole 8-3 of the adapter plate 8-1, officially entering the positioning stage. At this time, the thickness of the thermal pad 5 is extruded and deformed by 20% to 30%, which is within the normal deformation control range of the material. →⑤ As the power amplifier assembly 3 continues to move downward, the second feed port 3-5 at the bottom of the power amplifier body and the feed connector 10 between the feed network 8 begin to engage, and the thermal pad 5 continues to creep deform without extrusion deformation. →⑥ When the mounting flange 3-7 of the power amplifier assembly 3 contacts the groove of the front frame 2, the guiding and positioning process is completed, and then it can be tightened with screws. Considering that the power amplifier assembly 3 is tightly fitted, a disassembly process hole 3-6 is set in the middle of the flange 3-7 to facilitate disassembly. The power amplifier assembly 3 rapidly dissipates heat through the thermal pads 5 to the cavity walls 2-5 of the front end frame 2. The front end frame 2 is made of aluminum alloy 6061, which has high thermal conductivity. This means that the thermal pads 5 can quickly diffuse heat throughout the cavity walls 2-5 and then conduct it to the phase-change energy storage material 4 within the blind cavity 2-4. The phase-change energy storage material 4 is made of expanded graphite impregnated with paraffin wax and has high thermal conductivity and latent heat of phase change. To reduce contact thermal resistance, the phase-change energy storage material 4 is extruded into the blind cavity 2-4 to ensure good contact with the cavity walls. The blind cavity depth is greater than the height of the energy storage material, providing space for the phase-change energy storage material to expand due to heat, thus preventing deformation of the front end frame caused by the thermal expansion of the energy storage material. Because the insertion and removal direction of the power amplifier assembly 3 is perpendicular to the direction of heat conduction, and to reduce the contact thermal resistance between the power amplifier assembly and the cavity wall of the array frame, a thermal pad 5 is mounted between the conduction interfaces. During the insertion and removal of the power amplifier assembly 3, the thermal pad 5 will experience sliding displacement in the blind insertion direction and extrusion displacement in the heat conduction direction, that is, creep will occur within the thermal pad 5. The thermal pad 5 of the present invention uses an isotropic thermal interface material, and creep does not affect the thermal conductivity of the material. This creates a compact, highly efficient, and low thermal resistance thermal conduction energy storage system: power amplifier assembly → thermal pad → cavity wall of the front frame → phase change energy storage material.

[0046] It should be noted that the upper half skeleton 2-1 and the lower half skeleton 2-2 of the front-end skeleton 2 both adopt a honeycomb structure design, are integrally processed and formed, and are supported internally by criss-crossing thin cavity walls 2-5. The structure has good integrity, compactness, and rigidity, which can greatly improve the equipment integration and reduce weight. The antenna mounting plate 1-1 and the adapter plate 8-1 are whole-plate structures, and the structural rigidity is further improved after the connection is tightened. The guide and positioning structure is machined integrally with the components, with locating pins 9 used to simultaneously position the lower half frame 2-2 and the feed network 8. During installation of the power amplifier assembly 3, the bottom is guided by the wedge-shaped block 3-2 in conjunction with the bevel block 8-2 on the adapter plate 8, while the top is guided by the guide protrusion 3-1 in conjunction with the guide groove 2-6 on the front frame. After entering the effective positioning stage, the wedge-shaped block 3-2 enters the square hole 8-3, and the guide protrusion 3-1 fully enters the guide groove 2-6, achieving vertical positioning. This eliminates the need for guide pins and pin screws for assembly and positioning, reducing assembly and fitting steps. Due to its integral machining, the assembly is compact, highly precise, and provides stable and reliable guidance and positioning. A heat dissipation system, consisting of a power amplifier assembly 3, a creep-extruded isotropic thermal interface material thermal pad 5, an aluminum alloy cavity wall 2-5, and a phase-change energy storage material 4 with high thermal conductivity and latent heat, achieves rapid temperature control of the power amplifier assembly, with a uniform temperature of less than 7°C across each assembly. The phase change energy storage material is sealed by a sealing structure formed by a thin sealing bracket 6, a sunken surface 2-8, an inner wall 2-9 and a sealing strip 7. There is no leakage, and the sealing effect meets the use requirements. The thickness of the cavity wall 2-5 is reduced by about 35%, which greatly reduces the weight of the equipment and improves space utilization.

[0047] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A cellular active phased array front-end structure, characterized in that: include: A front-end skeleton (2) is provided with a plurality of through cavities (2-3) and a plurality of blind cavities (2-4), wherein a power amplifier assembly (3) is installed in the through cavity (2-3), and a phase change energy storage material (4) is filled in the blind cavity (2-4), wherein the blind cavities (2-4) are distributed around the through cavity (2-3) to separate adjacent through cavities (2-3), and a heat-conducting pad (5) is provided on the heat dissipation surface (3-3) of the power amplifier assembly (3); The antenna array (1) is mounted on the upper end surface of the front frame (2) and is connected to the power amplifier assembly (3) via a feed connector (10); and a feed network (8), which is mounted on the lower end surface of the front frame (2) and is connected to the power amplifier assembly (3) via a feed connector (10); The power amplifier assembly (3) includes: a power amplifier body, a first feed port (3-4) being provided on the top thereof, and a second feed port (3-5) being provided on the bottom thereof, wherein the power amplifier body is arranged in the through cavity (2-3) via a guide positioning structure, and the first feed port (3-4) is connected to the antenna array (1) via a feed connector (10), and the second feed port (3-5) is connected to the feed network (8) via the feed connector (10); The guiding and positioning structure includes: A guide boss (3-1) is provided on an opposite side surface close to the top of the power amplifier body; A guide groove (2-6) is provided on the opposite surface of the through cavity (2-3), and the guide boss (3-1) matches the guide groove (2-6); A wedge-shaped block (3-2) is provided on one side of the bottom of the power amplifier body; and an oblique block (8-2) disposed on the adapter plate (8-1); the oblique block (8-2) and the corresponding wedge-shaped block (3-2) of the power amplifier body cooperate to guide the power amplifier body so that the wedge-shaped block (3-2) enters the square hole (8-3) opened on the adapter plate (8-1).

2. The cellular active phased array front-end structure according to claim 1, characterized in that: The front-end skeleton (2) includes: The upper half frame (2-1) and the lower half frame (2-2) are connected by screws, wherein the through cavity (2-3) passes through the upper half frame (2-1) and the lower half frame (2-2), and the blind cavity (2-4) is provided on the opposite sides of the upper half frame (2-1) and the lower half frame (2-2); and a sealing bracket (6) disposed between opposing surfaces of the upper half frame (2-1) and the lower half frame (2-2), the sealing bracket (6) being interpenetrating with corresponding positions of the through cavity (2-3), the sealing bracket (6) being provided with a mounting protrusion for cooperating with the blind cavity (2-4), and sealing strips (7) being provided between the mounting protrusion and the blind cavity (2-4) and between the through cavity (2-3) and the through opening; A closed cavity is formed between each blind cavity (2-4) and the mounting protrusion of the sealing bracket (6), and the phase change energy storage material (4) is filled in the closed cavity.

3. The cellular active phased array front-end structure according to claim 2, characterized in that: The lower half frame (2-2) has a sunken surface (2-8), the sealing bracket (6) is arranged in the sunken surface (2-8), and installation gaps for installing the sealing strip (7) are formed between the outer peripheral surface of the sealing bracket (6) and the inner wall surface (2-9) of the lower half frame (2-2), between the through-opening of the sealing bracket (6) and the cavity wall (2-5) of the through cavity (2-3), and between the installation protrusion of the sealing bracket (6) and the cavity wall (2-5) of the blind cavity (2-4).

4. The cellular active phased array front-end structure according to claim 2, characterized in that: The antenna array (1) is connected to the top of the upper half frame (2-1) through the antenna mounting plate (1-1); the feed network (8) is connected to the bottom of the lower half frame (2-2) through the adapter plate (8-1).

5. The cellular active phased array front-end structure according to claim 4, characterized in that: A mounting flange (3-7) is provided on one side of the top of the power amplifier body. The mounting flange (3-7) is arranged in a groove opened in the upper half frame (2-1) on one side of the through cavity (2-3). The mounting flange (3-7) is connected to the groove of the upper half frame (2-1) by screws.

6. The cellular active phased array front-end structure according to claim 5, characterized in that: A heat dissipation surface (3-3) is provided on the side of the power amplifier body facing away from the mounting flange (3-7). A heat conduction pad (5) is provided on the heat dissipation surface (3-3), and the heat dissipation surfaces (3-3) of all power amplifier bodies are located on the same side of the power amplifier body.

7. The cellular active phased array front-end structure according to claim 1, characterized in that: The front end frame (2) is made of aluminum alloy.

8. The cellular active phased array front-end structure according to claim 1, characterized in that: The phase change energy storage material (4) is expanded graphite impregnated with paraffin wax.

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