Sandwich structure solid surface deployable antenna

Abstract

A solid-surface deployable antenna with a sandwich structure relates to the technical field of solid-surface deployable antennae and comprises a central body, at least three main panels are uniformly distributed at the top end of the central body along the circumferential direction, and the main panels are rotatably connected with the central body and can deflect up and down relative to the central body. Each main panel comprises an inner interlayer and an upper space, the inner interlayer and the upper space are separated through a partition plate, the inner interlayer and the upper space are each internally provided with an auxiliary panel, and when the main panels deflect downwards, the two auxiliary panels can extend outwards in the opposite directions and are spliced with the partition plates on the main panels to form a plane structure; when the main panel deflects upwards, the two auxiliary panels can be folded inwards into the inner interlayer and the upper space of the main panel. According to the solid-surface deployable antenna, forward miniaturization can be achieved, the overall size is remarkably reduced, the storage size is small, and the problem of space occupation of an existing solid-surface antenna can be solved.

Description

Technical Field

[0001] The present invention relates to the technical field of solid-surface deployable antennas, and in particular to a solid-surface deployable antenna with a "sandwich" structure. Background Art

[0002] The deployable structures of existing reflector antennas can be specifically divided into truss-type, radial rib-type, inflatable and plate-type structures according to the differences in the configuration of the basic deployment unit. Among these structures, the fixed-surface antenna adopts a plate-type structure, which is a commonly used antenna type at the high-frequency end of the radio spectrum, especially in the microwave band. Although this type of fixed-surface antenna has obvious advantages in high gain and strong directivity, its size is usually large, which not only limits its use in application scenarios with limited space, but also limits its portability, and may also limit its power capacity. With the rapid development of mobile communications, the Internet of Things and 5G technologies, the market demand for high-performance, low-loss and wide-band characteristic antennas is increasing. In this case, for fixed-surface antennas, ensuring communication quality requires higher accuracy and stability. However, existing fixed-surface antennas have many problems in terms of storage ratio, failure risk of the deployed structure and bulky structure, which are difficult to meet actual needs. Summary of the invention

[0003] The purpose of the present invention is to provide a solid-surface deployable antenna with a "sandwich"-like storage reflector surface. The antenna can not only achieve forward miniaturization and significantly reduce the overall size, but also has a smaller storage volume, which can solve the problem of space occupation of existing solid-surface antennas.

[0004] In order to achieve the above-mentioned purpose, the present invention adopts the following technical scheme: a "sandwich" structure solid-surface expandable antenna, including a central body, at least three main panels are evenly distributed on the top of the central body along the circumferential direction, the main panels are rotatably connected to the central body and can deflect up and down relative to the central body, each main panel includes an internal interlayer and an upper space, which are separated by a partition, and a sub-panel is respectively arranged in the internal interlayer and the upper space. When the main panel is deflected downward, the two sub-panels can extend outward in opposite directions and be spliced ​​with the partition on the main panel to form a planar structure. When the main panel is deflected upward, the two sub-panels can be retracted inward into the internal interlayer and the upper space of the main panel.

[0005] Furthermore, the auxiliary panel is connected to the main panel via a guide structure to ensure that the auxiliary panel can move along a predetermined track.

[0006] Furthermore, the guide structure includes a guide column and a guide groove, wherein the guide column is mounted on the auxiliary panel or the main panel, and the guide groove is correspondingly arranged on the other panel, and the two cooperate to guide the movement of the auxiliary panel.

[0007] Further, the guide groove includes a horizontal section and a vertical section, so that the secondary panel can move horizontally and vertically relative to the main panel.

[0008] Furthermore, the guide posts are arranged at the front and rear ends of the auxiliary panel or the main panel, and the guide grooves are correspondingly arranged at the front and rear ends of the other panel, and the guide posts at both ends are collinear.

[0009] Furthermore, the guide structure includes arc-shaped guide surfaces arranged at the front and rear ends of the internal interlayer and upper space of the main panel, and another arc-shaped guide surface correspondingly arranged at the front and rear ends of the two auxiliary panels.

[0010] Furthermore, upward and downward concave steps are respectively provided on both sides of the partition on the main panel, and reverse steps are provided at corresponding positions of the two sub-panels. The steps on the sub-panel located in the internal interlayer are concave steps, and the steps on the sub-panel located in the upper space are upward concave steps. When the antenna is unfolded, the concave steps of the internal interlayer sub-panel and the upward concave steps of the upper space sub-panel fit with the steps on both sides of the partition on the main panel, thereby forming a stable planar structure.

[0011] Furthermore, when the antenna is unfolded, between two adjacent main panels, the sub-panel in the inner layer of one main panel and the sub-panel in the space above the adjacent main panel abut against each other, thereby forming a complete and stable planar antenna structure.

[0012] Furthermore, the central body includes a fixed rod at the lower end, a slidable movable ring is installed on the fixed rod, a main rib is provided on the main panel, the main rib is movably connected to the movable ring through a main telescopic rod, and is movably connected to the two sub-panels through an auxiliary telescopic rod.

[0013] Furthermore, the telescopic direction of the main telescopic rod is coplanar with the deflection direction of the main panel.

[0014] Furthermore, the lower end of the fixing rod is connected to a base and can deflect up and down relative to the base.

[0015] Furthermore, the partitions on each main panel are spliced ​​with the two sub-panels of the main panel to form a sector body, and the sector bodies formed by the partitions on all main panels and their two sub-panels are spliced ​​together around the central body to form a circular planar antenna structure.

[0016] The present invention adopts a unique "sandwich" structure, and realizes the forward miniaturization of the antenna through the rotational connection between the main panel and the central body and the extension and folding design of the sub-panel, which significantly reduces the overall size and is more suitable for space-constrained environments. When stored, the sub-panel can be folded into a specific space of the main panel, which reduces the storage volume and greatly improves the storage ratio, making it easier to place in a vehicle. This unique structural design not only makes the deployment and folding process of the antenna flexible, stable and easy to control, reducing the complexity and failure risk of the deployment structure, but also, in the deployed and working state, the "sandwich" structure and the setting of the internal space make the antenna structure stable, able to withstand certain external forces and vibrations, and ensure normal operation. In addition, while achieving miniaturization and reducing the storage volume, the solid surface antenna can still maintain the high gain and strong directivity of the solid surface antenna itself, which can well meet the application scenarios with high requirements for antenna performance, such as satellite communications and radar detection. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 Schematic diagram of the process of folding and unfolding of the "sandwich" structure solid surface deployable antenna Figure 1 ; Figure 2 Schematic diagram of the process of folding and unfolding of the "sandwich" structure solid surface deployable antenna Figure 2 ; Figure 3 It is a cross-sectional view of the main panel and its sub-panel during the process of folding and unfolding of the "sandwich" structure solid surface deployable antenna; Figure 4 Schematic diagram of the antenna structure in the folded state Figure 1 , only one main panel is shown; Figure 5 Schematic diagram of the antenna structure in the folded state Figure 2 , only one main panel is shown; Figure 6 Schematic diagram of the antenna structure in the intermediate state Figure 1 , only one main panel is shown; Figure 7 Schematic diagram of the antenna structure in the intermediate state Figure 2 , only one main panel is shown; Figure 8 Schematic diagram of the antenna structure in the unfolded state Figure 1 , only one main panel is shown; Fig. 9 Schematic diagram of the antenna structure in the unfolded state Figure 2 , only one main panel is shown; Fig.10 The structure of the main panel Figure 1 ; Fig.11 The structure of the main panel Figure 2 ; Fig.12 A cross-sectional view of the main panel; Fig.13 is a structural schematic diagram of the lower sub-panel; Fig.14 This is a structural diagram of the upper sub-panel.

[0018] In the figure: 1——Center body 1a——Top seat 1b——Fixed rod 1c——Base 2——Main Panel 2a——Internal Interlayer 2b - Upper space 2c - Partition 2c1 - Steps on the left side of the partition 2c2 - Steps on the right side of the partition 3a——Upper sub-panel 3a1——Upper sub-panel step 3b——Lower sub-panel 3b1——Lower sub-panel step 4——Guide column 5——Guide groove 5a——Horizontal section 5b——vertical section 6——movable ring 7——main rib 8——Main telescopic rod 9——Auxiliary telescopic rod 10——Hinge 11——Connector 12——Bump 13——Curved guide surface 14——Universal joint 15——Connecting seat 16——Secondary rib 17——Connecting rod. DETAILED DESCRIPTION

[0019] In order to facilitate those skilled in the art to more clearly understand the concept of the present invention, it is further described below in conjunction with the embodiments and drawings. In addition, the words such as connected and connected mentioned in the embodiments are not limited to direct connection, and can also be indirect connection.

[0020] This embodiment aims to provide a solid surface deployable antenna that stores the reflective surface like a "sandwich" to improve the storage ratio of the antenna, reduce the risk of failure of the deployed structure, and reduce the weight of the structure. The solid surface antenna is a solid surface deployable antenna that combines a truss type and a plate type, including a central body 1, a main panel 2, a secondary panel and other components. The specific structure can be seen in Figure 1-14 .

[0021] like Figure 1 , 2 As shown, at least three main panels 2, for example, six, are evenly spaced at the top of the central body 1 along the circumferential direction. This embodiment is specifically described with six main panels 2. The main panels 2 are rotatably connected to the central body 1 and can deflect up and down relative to the central body 1, such as Figure 3 and Figure 10-12As shown, each main panel 2 includes an inner interlayer 2a and an upper space 2b, and a sub-panel is arranged in each of the two spaces. Among them, the sub-panel located in the upper space 2b can be called an upper sub-panel 3a (its structure can be seen in Fig.14 ), the sub-panel located in the inner interlayer 2a can be called the lower sub-panel 3b (its structure can be seen in Fig.13 ). To put it further, the main panel 2 can be understood as a two-layer hollow structure with the top surface removed, and its upper and lower interlayers correspond to the internal interlayer 2a and the upper space 2b respectively, and they are separated by a partition 2c, thereby forming an upper and lower interlayer. When the main panel 2 is deflected downward, the two sub-panels can extend outward in opposite directions, that is, move from the inside of the internal interlayer 2a and the upper space 2b to the outside, and can be spliced ​​with the partition 2c on the main panel 2 to form a planar structure; and when the main panel 2 is deflected upward, the two sub-panels can be retracted inward to the internal interlayer 2a and the upper space 2b of the main panel 2, that is, move from the outside of the internal interlayer 2a and the upper space 2b to the inside. Each group of main panels 2 and the sub-panels above it have the same structure. In view of the fact that the structure between the main panel 2 and the sub-panels is similar to a sandwich, this embodiment refers to this antenna structure as a "sandwich" structure solid surface deployable antenna. It should be noted that the inner interlayer 2a and the upper space 2b of the main panel 2 are usually considered to be open on at least one side to allow the sub-panel to enter and exit, otherwise the extension and retraction of the sub-panel will be difficult to achieve. In this embodiment, the left side of the inner interlayer 2a is open, and the right side is closed (it can also be open), and the upper space 2b has no top surface, and its left and right sides are both open.

[0022] The central body 1 can be an integrated structure or a split structure. In order to facilitate processing and assembly, the present embodiment adopts a split structure. Figure 4-9 As shown, the central body 1 is mainly composed of a top seat 1a at the top, a fixed rod 1b in the middle and a base 1c at the bottom. The main panel 2 is installed on the top seat 1a at the top of the central body 1. The top seat 1a is a hexagonal prism structure, and a hinge 10 is arranged on each of its six edges. The six hinges 10 are respectively connected to the six main panels 2 to achieve a rotational connection, so that the main panel 2 can deflect up and down with the axis of the hinge 10 as the rotation axis. A movable ring 6 that can slide up and down along its axis is installed on the middle fixed rod 1b. The movable ring 6 is used to connect the main panel 2 and the sub-panel to control their up and down deflection. The fixed rod 1b can adopt an optical axis, which is usually cylindrical in shape, and the bottom of the fixed rod 1b is rotatably connected to the base 1c through a connector 11, so that the entire antenna structure can deflect up and down relative to the base 1c. When working, it deflects upward to stand up to meet working requirements; when idle, it deflects downward to be horizontal to reduce occupied space and possible external influences. For example, if Figure 4As shown, the connector 11 can be a double-ear structure, that is, a double-ear seat, which is fixed to the bottom of the fixed rod 1b. In conjunction with it, a protrusion 12 is provided on the base 1c, and the connector 11 is installed on the protrusion 12 through a rotating shaft. In this way, the fixed rod 1b and the components thereon can be deflected with the axis of the rotating shaft as the rotation axis.

[0023] In order to ensure that the secondary panel can move along the predetermined track, the secondary panel is connected to the main panel 2 through a guide structure in this embodiment. The guide structure includes a guide column 4 and a guide groove 5. The guide column 4 is installed on the secondary panel or the main panel 2 (usually the front and rear ends), and the guide groove 5 is correspondingly arranged on the other panel (usually the front and rear ends). The two cooperate to guide the movement of the secondary panel. In this embodiment, Figure 10-13 As shown, the guide column 4 is installed at the front and rear ends of the two sub-panels, and the guide groove 5 is set at the front and rear ends of the main panel 2. The guide groove 5 includes a horizontal section 5a and a vertical section 5b, so that the sub-panel can move horizontally and vertically relative to the main panel 2. Among them, the horizontal section 5a and the vertical section 5b can be smoothed to facilitate the smooth movement of the guide column 4. Taking the two guide grooves 5 at the front or rear ends of the two interlayers (the inner interlayer 2a and the upper space 2b) as an example, usually, the horizontal sections 5a of the two guide grooves 5 are arranged inwardly, and the two vertical sections 5b are arranged one above and one below relative to the horizontal sections 5a. For example, the guide groove 5 in the inner interlayer 2a of the main panel 2 is that the horizontal section 5a is arranged at the right lower side (i.e., the inner lower side) of the vertical section 5b, and the guide groove 5 in the upper space 2b is that the horizontal section 5a is arranged at the left upper side (i.e., the inner upper side) of the vertical section 5b. The guide columns 4 at the front and rear ends of the sub-panel or the main panel 2 are collinear, and they are on the same radial line. In this way, when the antenna is unfolded, the sub-panel (lower sub-panel 3b) in the internal interlayer 2a can move along the lower guide groove 5, first moving horizontally to the left along the horizontal section 5a, and then moving upward along the vertical section 5b, so that the sub-panel can be aligned with the partition 2c on the main panel 2. Similarly, the sub-panel (upper sub-panel 3a) in the upper space 2b can move along the upper guide groove 5, first moving horizontally to the right along the horizontal section 5a, and then moving downward along the vertical section 5b, so that the sub-panel can be aligned with the partition 2c on the main panel 2, so that the partition 2c on the main panel 2 is spliced ​​with the two sub-panels to form a planar structure.

[0024] In addition, the guide structure also includes an arc-shaped guide surface 13 provided at the front and rear ends of the inner interlayer 2a and the upper space 2b of the main panel 2, and another arc-shaped guide surface 13 provided at the front and rear ends of the two sub-panels, so that the inner interlayer 2a and the upper space 2b of the main panel 2 are fan-shaped structures, as shown in FIG. Figure 6 , 8, 13, 14. The arc openings of these arc guide surfaces 13 are all facing the central body 1 and are all coaxial. A certain gap (gap connection or sliding connection) can be left between the main panel 2 and the arc guide surfaces 13 of the two sub-panels, so that the panels can slide relative to each other, which is convenient for the sub-panels to move.

[0025] Under the action of the guide structure, the two sub-panels can move in a directional manner in the inner interlayer 2a and the upper space 2b. Even if these panels need to use high-side structures such as universal joints to achieve corresponding movements, the guide structure can achieve stable movement between the panels, thereby greatly reducing the negative impact of these high-side structures on the antenna structure surface accuracy.

[0026] In this embodiment, if Figure 3 and Figure 10-14As shown, both sides of the main panel 2 (mainly referring to both sides of the partition 2c) are provided with concave and concave steps respectively, and the corresponding positions of the two sub-panels are provided with reverse steps. The steps on the sub-panel (lower sub-panel 3b) located in the inner interlayer 2a are concave steps, and the steps on the sub-panel (upper sub-panel 3a) located in the upper space 2b are concave steps. When the antenna is unfolded, the concave steps of the sub-panel (lower sub-panel 3b) of the inner interlayer 2a and the concave steps of the sub-panel (upper sub-panel 3a) of the upper space 2b fit with the steps on both sides of the partition 2c on the main panel 2, thereby forming a stable plane structure. In addition, when the antenna is unfolded, between two adjacent main panels 2, the sub-panel (lower sub-panel 3b) of the inner interlayer 2a of one main panel 2 will abut against the sub-panel (upper sub-panel 3a) of the upper space 2b of the adjacent main panel 2. This close abutment makes the connection between each main panel 2 and its sub-panel more closely, enhances the stability and integrity of the entire antenna structure, and finally constructs a complete and stable planar antenna structure. Specifically, concave and concave steps are provided on both sides of the partition 2c on the main panel 2, and correspondingly, the inner interlayer 2a sub-panel (lower sub-panel 3b) has a concave step, and the upper space 2b sub-panel (upper sub-panel 3a) has an upper concave step. With this complementary step design, when the antenna is unfolded, the steps of the two sub-panels can accurately fit the steps on the main panel 2. The tight fit makes the connection between the panels more stable. Compared with a simple plane connection, the fit of the steps increases the contact area and friction, which can effectively resist the relative displacement of the panels caused by external forces (such as wind, vibration, etc.), and ensure the stable operation of the antenna in various environments. For example, in an environment with strong wind at high altitude, this stable connection can ensure that the antenna structure does not loosen and maintain the normal transmission and reception of signals. Moreover, when the concave steps of the inner interlayer 2a sub-panel (lower sub-panel 3b) and the concave steps of the upper space 2b sub-panel (upper sub-panel 3a) fit the steps on both sides of the partition 2c, a stable plane structure can be formed. For antennas, the flatness of the planar structure is crucial to the quality of signal transmission. This design can minimize problems such as signal reflection and scattering caused by uneven panel splicing, ensure effective radiation and reception of signals, and improve the gain and directivity of the antenna. Taking satellite communication antennas as an example, the flat planar structure can enable signals to be more accurately aligned with the target satellite, reduce signal loss, and improve the reliability and stability of communications. In addition, the panels cooperate with each other through steps to form an organic whole. This structural design enhances the integrity and rigidity of the entire antenna structure. When subjected to external pressure or impact, the panels can work together to disperse stress and avoid structural damage caused by single-point force. For example, when hit by space debris or strong winds under extreme weather conditions, the overall structure of the antenna can better withstand external forces, reduce the risk of damage, and extend the service life of the antenna.The advantages of the above structure are not only reflected in the coordination of a single main panel 2 and its sub-panel, but the abutment of the sub-panels between adjacent main panels 2 further strengthens these advantages at the entire antenna level, thereby comprehensively improving the performance of the antenna in complex environments.

[0027] It should be noted that, in the stowed state, the sub-panel (lower sub-panel 3b) in the inner interlayer 2a is located at the lower part of the inner interlayer 2a, and a gap is left between its upper end and the lower end of the partition 2c (no obstruction at the step), so that the sub-panel can move to the upper left along the guide groove 5. Similarly, in the stowed state, the sub-panel (upper sub-panel 3a) in the upper space 2b is located at the upper part of the upper space 2b, and a gap is left between its lower end and the upper end of the partition 2c (no obstruction at the step), so that the sub-panel can move to the lower right along the guide groove 5.

[0028] Among them, Figure 3 , 12 As shown, the steps on both sides of the partition 2c are located on the left side of the lower end of the partition 2c and the right side of the upper end of the partition 2c, respectively. The left side is an upward concave step, and the right side is a downward concave step, and they are called the partition left side step 2c1 and the partition right side step 2c2. Figure 3 , 13 As shown in FIG. 3 and FIG. 14 , the step on the lower sub-panel 3b in the inner interlayer 2a is located on the right side of its upper end, which is referred to as the lower sub-panel step 3b1. As shown in FIG. 3 and FIG. 14 , the step on the upper sub-panel 3a in the upper space 2b is located on the left side of its lower end, which is referred to as the upper sub-panel step 3a1.

[0029] In this embodiment, if Figure 2 , 5 As shown in Figures 7 and 9, the bottom surface of the main panel 2 is provided with a main rib 7, which is usually arranged in the middle position of the main panel 2. The main rib 7 of the main panel 2 is movably connected to the movable ring 6 through the main telescopic rod 8, and is movably connected to the two sub-panels through the auxiliary telescopic rod 9. The movable ring 6 moves up and down along the fixed rod 1b, driving the main telescopic rod 8 to extend and retract, so that the main panel 2 flips along the hinge 10. By controlling the up and down movement of the movable ring 6 and the telescopic movement of each telescopic rod, the up and down deflection of the main panel 2 and the extension and retraction of the sub-panels can be controlled. In this way, not only the control structure is very simple, but also the control logic becomes simple. Specifically, as shown in FIG. Figure 7 , 8As shown, both ends of the main telescopic rod 8 are provided with double-ear seats, and the double-ear seats are connected to the fixed block provided on the movable ring 6 and the main rib 7 on the main panel 2 through a rotating shaft. The connecting seats 15 on both sides of the main rib 7 of the main panel 2 are connected to the ends of the auxiliary telescopic rods 9 on both sides through a universal joint 14, and the other end of the auxiliary telescopic rod 9 is connected to the corresponding sub-panel through the universal joint 14. A secondary rib 16 can be provided on the outer edge of the bottom surface of the sub-panel, and the secondary rib 16 is connected to the universal joint 14 at the other end of the auxiliary telescopic rod 9 through a rotatable connecting rod 17. Of course, the connecting rod 17 can also be connected to the secondary rib 16 on the sub-panel using the aforementioned double-ear seat, fixed block and rotating shaft connection structure. For example, the double-ear seat is provided at the end of the connecting rod 17, and the fixed block is provided at the end of the secondary rib 16 of the sub-panel (of course, the secondary rib 16 itself can also be used as a fixed block), and they are connected through a rotating shaft. In addition, as Fig.10 , 11 As shown, the main rib 7 on the main panel 2 can be a V-shaped rod, the main telescopic rod 8 is connected to the tip of the V-shaped rod, and the auxiliary telescopic rod 9 is connected to the inner position of the tip of the V-shaped rod (that is, the connecting seat 15 is arranged at the inner position of the tip of the V-shaped rod). The two auxiliary telescopic rods 9 are usually symmetrically arranged relative to the main telescopic rod 8. In addition, due to the position difference of the two sub-panels, the length of the sub-ribs 16 on them can be adjusted appropriately according to needs. Usually, the length of the sub-ribs 16 on the sub-panel (lower sub-panel 3b) of the inner interlayer 2a of the main panel 2 is shorter than the length of the sub-ribs 16 on the sub-panel (upper sub-panel 3a) of the upper space 2b of the main panel 2.

[0030] In order to ensure the stability of the up and down deflection movement of the main panel 2, the telescopic direction of the main telescopic rod 8 is usually coplanar (i.e. located on the same plane) with the deflection direction of the main panel 2 (i.e. the relative movement direction between the main rib 7 on the main panel 2 and the main telescopic rod 8). Since the sub-panel is connected to the main panel 2 through a guide structure, the sub-panel can deflect up and down with the main panel 2, so that the antenna is folded toward the center. At the same time, the two sub-panels can be stored in the specific space of the main panel 2 (the internal interlayer 2a and the upper space 2b), so that the size of the entire antenna after folding is further reduced.

[0031] In this embodiment, the driving method of the rotational connection between the components is flexible. It can be driven by other components connected to it, or it can be driven separately by setting a driving component such as a motor according to actual needs. For example, the rotation between the fixed rod 1b and the base 1c can be achieved by setting a motor. Similarly, the telescopic driving methods of telescopic components such as the main telescopic rod 8 and the auxiliary telescopic rod 9 are also diverse. It can be driven by other components connected to it, and it can also achieve autonomous telescopic extension with the help of its own driving components. The most suitable driving method can be selected according to actual needs. For example, the main telescopic rod 8 and the auxiliary telescopic rod 9 can both be driven to extend and retract by themselves, and the main telescopic rod 8 can also be extended and retracted under the drive of the movable ring 6 to meet the use requirements in different scenarios.

[0032] In addition, if Figure 1 As shown, in this embodiment, the partition 2c on each main panel 2 can be spliced ​​with the two sub-panels of the main panel 2, namely the upper sub-panel 3a and the lower sub-panel 3b, to form a fan-shaped body. Among them, the partition right step 2c2 and the partition left step 2c1 of the partition 2c are tightly spliced ​​with the upper sub-panel step 3a1 of the upper sub-panel 3a and the lower sub-panel step 3b1 of the lower sub-panel 3b respectively. The fan-shaped body formed by the partition 2c on all main panels 2 and their two sub-panels 3a and 3b can be spliced ​​together around the central body 1 to form a circular planar antenna structure. This fan-shaped body structure formed by splicing the partition 2c on the main panel 2 and the two sub-panels 3a and 3b makes the fan-shaped body itself have good stability and strength. When multiple fan-shaped bodies are spliced ​​together around the central body 1 to form a circular planar antenna structure, the fan-shaped bodies provide support and constraints to each other, further enhancing the stability of the entire antenna structure, so that it can withstand certain external forces and vibrations, and ensure normal operation in a complex working environment. Moreover, this circular structure has good symmetry and uniformity in the antenna, which is conducive to the reflection and reception of electromagnetic waves. It is widely used in satellite communications, radio astronomy and other fields, and can provide all-round signal coverage and reception capabilities.

[0033] The working process of the "sandwich" structure solid surface deployable antenna of this embodiment is roughly as follows: Folding to unfolding process: When the antenna is initially in position, the fixed rod 1b is parallel to the horizontal plane, the movable ring 6 is located at the top of the fixed rod 1b, the six main telescopic rods 8 are in an extended state, and the remaining auxiliary telescopic rods 9 are in a retracted state. At this time, the control motor is started to drive the fixed rod 1b to rotate in the vertical direction with the rotating shaft on the base 1c as the rotation axis. The control motor stops working until the fixed rod 1b is perpendicular to the horizontal plane. Then, the antenna device begins to unfold (see the unfolding process for details). Figure 1-3). During the unfolding process, the movable ring 6 moves downward along the fixed rod 1b, the six main telescopic rods 8 begin to shrink synchronously, and the remaining auxiliary telescopic rods 9 begin to extend synchronously. The main telescopic rod 8 pulls the main panel 2 to move downward in the clockwise direction along the hinge 10. At the same time, the auxiliary telescopic rod 9 on the left side of the main panel 2 drives the lower sub-panel 3b to extend outward along the corresponding guide groove 5 and align with the left side of the partition 2c on the main panel 2; the auxiliary telescopic rod 9 on the right side of the main panel 2 drives the upper sub-panel 3a to extend outward along the corresponding guide groove 5 and align with the right side of the partition 2c on the main panel 2. The whole process continues until the bottom surface of the main panel 2 (the surface of the partition 2c is parallel to it) is parallel to the horizontal plane, and the partition 2c on the main panel 2 is spliced ​​with the sub-panels on both sides to form a planar structure. At this time, the antenna is unfolded in place.

[0034] From the unfolding to the folding process: During the antenna folding stage, the movable ring 6 moves upward along the fixed rod 1b, the six main telescopic rods 8 begin to extend synchronously, and the remaining auxiliary telescopic rods 9 begin to retract synchronously. The main telescopic rod 8 pushes the main panel 2 to move upward counterclockwise along the hinge 10. At the same time, the auxiliary telescopic rod 9 on the left side of the main panel 2 drives the lower sub-panel 3b to be retracted inward along the corresponding guide groove 5 (i.e., move into the inner interlayer 2a of the main panel 2); the auxiliary telescopic rod 9 on the right side of the main panel 2 drives the upper sub-panel 3a to be retracted inward along the corresponding guide groove 5 (i.e., move into the upper space 2b of the main panel 2). This operation continues until the main panel 2 reaches the set position and the two sub-panels are retracted into the inner interlayer 2a and the upper space 2b of the main panel 2, at which time the antenna is folded into place.

[0035] In some special environments, such as deep space exploration or extreme weather conditions, it is necessary to use deployable antennas to meet special communication needs. The new solid-surface antenna provided in this embodiment can adapt to these special environments through its deployable design. Moreover, modern communication networks have increasing requirements for base station antennas, and antennas are developing in the direction of miniaturization, intelligence and greening. The development of the new solid-surface antenna structure in this embodiment can meet these new demands, increase network capacity, improve signal coverage and enhance transmission reliability. At the same time, solid-surface antennas are known for their high reliability, high precision and thermal stability. The development of the new solid-surface antenna structure in this embodiment can further improve these performances, especially when there are too many rotating pairs and there are high-pair structures such as ball joints and universal joints that affect the shape and surface accuracy of the antenna structure.

[0036] The above embodiments are preferred implementation schemes of the present invention. Any obvious replacements without departing from the concept of the present technical solution are within the protection scope of the present invention.

Claims

1. A "sandwich" structure solid surface deployable antenna, characterized by: The invention comprises a central body (1), wherein at least three main panels (2) are evenly distributed along the circumferential direction at the top of the central body (1), wherein the main panels (2) are rotatably connected to the central body (1) and can deflect upward and downward relative to the central body (1), wherein each main panel (2) comprises an inner sandwich (2a) and an upper space (2b), which are separated by a partition (2c), wherein a sub-panel (3a, 3b) is respectively arranged in the inner sandwich (2a) and the upper space (2b), and when the main panel (2) deflects downward, the two sub-panels (3a, 3b) can extend outward in opposite directions and be spliced ​​with the partition (2c) on the main panel (2) to form a planar structure, and when the main panel (2) deflects upward, the two sub-panels (3a, 3b) can be retracted inward into the inner sandwich (2a) and the upper space (2b) of the main panel (2).

2. The "sandwich" structure solid surface deployable antenna according to claim 1, characterized in that: The auxiliary panels (3a, 3b) are connected to the main panel (2) via a guide structure to ensure that the auxiliary panels (3a, 3b) can move along a predetermined track.

3. The "sandwich" structure solid surface deployable antenna according to claim 2, characterized in that: The guide structure comprises a guide column (4) and a guide groove (5); the guide column (4) is mounted on the auxiliary panel (3a, 3b) or the main panel (2); the guide groove (5) is correspondingly arranged on the other panel; the two cooperate to guide the movement of the auxiliary panel (3a, 3b).

4. The "sandwich" structure solid surface deployable antenna according to claim 3, characterized in that: The guide groove (5) comprises a horizontal section (5a) and a vertical section (5b), so that the secondary panels (3a, 3b) can move horizontally and vertically relative to the main panel (2).

5. The "sandwich" structure solid surface deployable antenna according to claim 3, characterized in that: The guide posts (4) are arranged at the front and rear ends of the auxiliary panels (3a, 3b) or the main panel (2), and the guide grooves (5) are correspondingly arranged at the front and rear ends of the other panel, and the guide posts (4) at both ends are collinear.

6. The "sandwich" structure solid surface deployable antenna according to claim 2, characterized in that: The guide structure comprises arc-shaped guide surfaces arranged at the front and rear ends of the inner interlayer (2a) and the upper space (2b) of the main panel (2), and another arc-shaped guide surface correspondingly arranged at the front and rear ends of the two auxiliary panels (3a, 3b).

7. The "sandwich" structure solid surface deployable antenna according to claim 1, characterized in that: The partition (2c) on the main panel (2) is provided with upward and downward concave steps on both sides respectively, and the two sub-panels (3a, 3b) are provided with reverse steps at corresponding positions, the steps on the sub-panel (3b) located in the internal interlayer (2a) are downward concave steps, and the steps on the sub-panel (3a) located in the upper space (2b) are upward concave steps. When the antenna is unfolded, the downward concave steps of the sub-panel (3b) in the internal interlayer and the upward concave steps of the sub-panel (3a) in the upper space fit with the steps on both sides of the partition (2c), thereby forming a stable planar structure.

8. The "sandwich" structure solid surface deployable antenna according to claim 7, characterized in that: When the antenna is unfolded, between two adjacent main panels (2), the sub-panel (3b) of the inner interlayer (2a) of one of the main panels and the sub-panel (3a) of the space (2b) above the adjacent main panel abut against each other, thereby forming a complete and stable planar antenna structure.

9. The "sandwich" structure solid surface deployable antenna according to claim 1, characterized in that: The central body (1) comprises a fixed rod (1b) at the lower end, a slidable movable ring (6) being mounted on the fixed rod (1b), a main rib (7) being arranged on the main panel (2), the main rib (7) being movably connected to the movable ring (6) via a main telescopic rod (8), and being movably connected to the two auxiliary panels (3a, 3b) via an auxiliary telescopic rod (9).

10. The "sandwich" structure solid surface deployable antenna according to claim 9, characterized in that: The telescopic direction of the main telescopic rod (8) is coplanar with the deflection direction of the main panel (2).

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