Electric field antenna device for microsatellite and dipole antenna

Abstract

The invention relates to the technical field of microsatellites, in particular to an electric field antenna device and dipole antenna for microsatellites, which comprises an antenna box and an antenna, and the antenna box is provided with an opening; the antenna is arranged in the antenna box; the antenna comprises two memory metal bands which are coupled in the length direction of the two memory metal bands, and the two memory metal bands are provided with linear memory shapes of which the cross sections are memorized into circular arcs and the inner concave surfaces of the circular arcs are opposite; when the two memory metal belts are rolled in the antenna box, the two memory metal belts overcome the memory shapes of the two memory metal belts to be attached and accumulate elastic potential energy so as to be switched to the storage state, the two memory metal belts can have the trend of extending outwards from the opening to the use state under the action of the elastic potential energy, and the two memory metal belts are reset to the memory shapes in the use state. The electric field antenna device has the beneficial effects that the kinetic energy of outward extension of the antenna is provided by the antenna, and other power components are not needed, so that the structural compactness of the electric field antenna device is greatly improved, and the curb mass of the electric field antenna device is reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of microsatellites, in particular to an electric field antenna device and a dipole antenna for microsatellites.

[0002] The present application claims priority to the application with the application number 202411725489.9 and the application date November 28, 2025, and the invention name "Electric field antenna device and dipole antenna system based on tape structure". BACKGROUND

[0003] With the wide application of microsatellites in the field of space environment detection, there is an increasing demand for high-precision, lightweight electric field measurement antennas.

[0004] In existing electric field antenna devices, in order to realize automatic deployment or maintain the stretched state of the antenna, it is usually necessary to rely on additional driving mechanisms, spring assemblies or complex mechanical structures, which not only increases the volume and weight of the overall device, but also reduces the reliability and compactness of the system. Especially in portable or weight-sensitive application scenarios, such additional power components can significantly restrict the lightweight design and deployment flexibility of the equipment. In addition, traditional antennas often lack sufficient structural rigidity after deployment and are prone to irreversible bending or deformation when subjected to external interference, affecting signal reception performance and even leading to functional failure; while using rigid materials can improve strength, it sacrifices storage convenience, making it difficult to balance the dual demands of deployment stability and compact storage. SUMMARY

[0005] (I) Technical problems to be solved

[0006] In view of the above-mentioned shortcomings and deficiencies of the prior art, the present application provides an electric field antenna device and a dipole antenna for microsatellites, which solves the technical problem of balancing the compactness, overall mass and reliability of the electric field antenna in the prior art.

[0007] (II) Technical solutions

[0008] In order to achieve the above-mentioned purposes, the main technical solutions adopted by the present application include:

[0009] In a first aspect, the present application provides an electric field antenna device for microsatellites, comprising an antenna box and an antenna, the antenna box being provided with an opening; the antenna is arranged in the antenna box; the antenna comprises two memory metal strips, which are coupled along the length direction of the strips and have a memory shape of a circular arc and a straight line shape opposite to the concave surface of the circular arc; when the two memory metal strips are wound in the antenna box, they are adhered and accumulate elastic potential energy to switch to a storage state by overcoming the memory shape; under the action of the elastic potential energy, the two memory metal strips have a tendency to extend outward from the opening to a use state, and in the use state, the two memory metal strips reset to the memory shape.

[0010] In one technical solution of the present application, a rotating shaft is further included, which is rotatably connected in the antenna box, and one end of each of the two memory metal bands is fixedly connected to the rotating shaft and can be wound on the rotating shaft in the circumferential direction.

[0011] In one technical solution of the present application, an elastic reset component is further included, which is arranged in the antenna box and accumulates the elastic force for switching the two memory metal bands to the use state when the two memory metal bands are switched to the storage state.

[0012] In one technical solution of the present application, the antenna further includes a connecting piece adapted to connect the two ends of the two memory metal bands in the width direction, so that the two memory metal bands remain integrated when switching between the storage state and the use state.

[0013] In one technical solution of the present application, the connecting piece is annular, and the circumference of the connecting piece is greater than or equal to the circumference of the two memory metal bands after being buckled; the inner wall of the connecting piece forms mutually connected adhesive sections and non-adhesive sections, the adhesive sections are mutually adhered to the outer convex surfaces of one memory metal band, and the non-adhesive sections are mutually contacted with the outer convex surfaces of the other memory metal band.

[0014] In one technical solution of the present application, a limiting piece is further included, which is adapted to selectively lock the angle of the rotating shaft in the antenna box, so as to limit the length of the antenna extending away from the antenna box.

[0015] In one technical solution of the present application, a female limiting hole is formed on the antenna box, a male limiting hole is formed on the rotating shaft, and the limiting piece can pass through the female limiting hole and the male limiting hole to selectively limit the relative rotation angle, thereby connecting the rotating shaft and the antenna box and limiting the length of the antenna extending out of the antenna box.

[0016] In one technical solution of the present application, the limiting piece is made of a fusible material; the electric field antenna device for microsatellites further includes a thermal resistor, and a fuse area for fusing the limiting piece is arranged on the thermal resistor.

[0017] In one technical solution of the present application, the limiting piece is a nylon rope, and the nylon rope passes through the female limiting hole and the male limiting hole and then passes through the fuse area.

[0018] In one technical solution of the present application, the antenna is uniformly provided with a plurality of marking parts along the length direction of the antenna; a visual camera fixedly connected to the antenna box is further included; when the tape antenna extends out to the use state, the visual camera can recognize the marking parts, so as to obtain the extension length of the tape antenna through the number of the recognized marking parts.

[0019] In a second aspect, the present application provides a dipole antenna, comprising two electric field antenna devices as claimed in any one of claims 1-9 arranged in mirror symmetry so that the two antennas form a dipole antenna with an extension direction in a straight line; the antenna boxes each comprise an end plate and a shell, the end plate is provided with a first through hole, a second through hole, a third through hole and a fourth through hole, the structures of the two antenna boxes are consistent; the axes of the first through hole, the second through hole, the third through hole and the fourth through hole of one antenna box are projected along the front-rear direction as points A, B, C and D; AC and BD intersect at point O, the projection of the rotation axis of the rotation shaft along the front-rear direction is the rotation axis of point O, AB is parallel to CD; the opening is provided on the shell, when the antenna is switched to the use state, the extension direction of the antenna is parallel to the extension direction of the angle bisector of ∠AOD; the axes of the first through hole, the second through hole, the third through hole and the fourth through hole of the other antenna box are projected along the front-rear direction as points A', B', C' and D', when the two electric field antenna devices form a dipole antenna, ABB'A' is parallel to the straight line DCC'D'.

[0020] (Three) beneficial effects

[0021] The beneficial effects of the present application are: the electric field antenna device and the dipole antenna for microsatellites of the present application, the antenna comprises two concave opposite memory metal strips, so that when the memory metal strips are wound on the rotation shaft under the action of external force, the antenna has a tendency to extend linearly from the opening to the outside of the antenna box, and the memory metal strips can maintain the state of extending out of the antenna box in the normal state, that is, when the antenna is switched from the self-stored state to the use state, the kinetic energy of the outward extension is provided by the antenna itself, without the need for other power components, thereby greatly improving the compactness of the structure of the electric field antenna device and reducing the overall weight of the electric field antenna device. The two concave opposite memory metal strips can make the antenna need a larger external force to be bent in the unfolded state, ensure the strength in the use state, and also can restore to a straight line state by its own restoring force when bent, thereby ensuring the use reliability of the antenna. By providing different length models of antennas, electric field antenna devices of different lengths can be obtained, and the use flexibility of the electric field antenna device is also ensured. BRIEF DESCRIPTION OF DRAWINGS

[0022] Figure 1 It is a schematic diagram of the shaft side structure of the electric field antenna device for microsatellites of the present application;

[0023] Figure 2 It is an exploded structural schematic diagram of the electric field antenna device for microsatellites of the present application;

[0024] Figure 3 It is a structural schematic diagram of the elastic reset assembly of the present application;

[0025] Figure 4 It is a structural schematic diagram of the elastic reset assembly of the present application;

[0026] Figure 5 This is one of the structural schematic diagrams of the antenna of the present invention;

[0027] Figure 6 This is the second schematic diagram of the antenna structure of the present invention;

[0028] Figure 7 This is one of the structural schematic diagrams showing the location of the thermal resistor in this invention;

[0029] Figure 8 This is a second structural schematic diagram of the location of the thermal resistor in this invention;

[0030] Figure 9 This is a top view schematic diagram of the electric field antenna device for microsatellites according to the present invention;

[0031] Figure 10 This is a schematic diagram of the main view of the electric field antenna device for microsatellites of the present invention;

[0032] Figure 11 This is a schematic diagram of the handle of the present invention;

[0033] Figure 12 This is a schematic diagram of the antenna box layout for the electric field antenna under the operating conditions of the dipole antenna of the present invention.

[0034] [Explanation of Labels in the Attached Image]

[0035] 1. Antenna box; 11. End plate; 12. Housing; 100. Opening; 110. Female limiting hole; 120. First through hole; 130. Second through hole; 140. Third through hole; 150. Fourth through hole;

[0036] 2. Rotating shaft; 200. Sub-limiting hole;

[0037] 3. Antenna; 31. Memory metal strip; 32. Connector; 321. Adhesive tape; 322. Padding layer;

[0038] 5. Limiting components;

[0039] 61. Resistance temperature detector (RTD);

[0040] 7. Handle;

[0041] 8. Elastic reset assembly; 81. Sliding sleeve; 82. Torsion spring; 83. Lever. Detailed Implementation

[0042] To better explain and facilitate understanding of this invention, the following description is provided in conjunction with the appendix. Figures 1-12 The present invention will be described in detail through specific embodiments. In this document, directional terms such as "upper" and "lower" are used interchangeably with other directional terms. Figure 1 The orientation is used as a reference.

[0043] Embodiment 1:

[0044] With reference to Figures 1-12 The embodiment of the present application provides a micro-satellite electric field antenna device, which comprises an antenna box 1 and an antenna 3, the antenna box 1 is provided with an opening 100, and the antenna 3 is arranged in the antenna box 1.

[0045] The antenna 3 comprises two memory metal strips 31, which are coupled along the length direction of the memory metal strips 31 and have a memory shape of a straight line opposite to a concave surface of a circular arc.

[0046] When the two memory metal strips 31 are wound in the antenna box 1, the two memory metal strips 31 are adhered and accumulate elastic potential to switch to a storage state by overcoming the memory shape, the two memory metal strips 31 have a tendency to extend to a use state from the opening 100 under the action of the elastic potential, and the two memory metal strips 31 reset to the memory shape in the use state.

[0047] In the embodiment, the antenna box 1 is internally designed with a containing cavity for mounting and fixing other components. The antenna box 1 is further provided with an opening 100 for the extension and retraction of the antenna 3.

[0048] The antenna 3 comprises two memory metal strips 31, by arranging the two memory metal strips 31 in a concave surface opposite mode, the antenna 3 can maintain the force to restore to the use state, so that when the memory metal strips are wound in the antenna box 1 under the action of an external force, the antenna 3 has a tendency to extend linearly from the opening 100 to the outside of the antenna box 1, so that the memory metal strips 31 can maintain the state of extending out of the antenna box 1 in a normal state, that is, the kinetic energy of the antenna 3 extending outward is provided by the antenna 3 itself, without other power components, thereby greatly improving the compactness of the electric field antenna device and reducing the weight of the electric field antenna device. By arranging different length models of the antenna 3, electric field antenna devices with different antenna lengths can be obtained, so that the use flexibility of the electric field antenna device is also ensured.

[0049] The concave surface opposite mode of the two memory metal strips 31 can make the antenna 3 need a large external force to be bent in the unfolded state, so as to ensure the strength in the use state. At the same time, even if the antenna 3 is bent, it can also restore to a straight line state by the restoring force itself, so as to ensure the use reliability of the antenna 3.

[0050] Specifically, the structure of the antenna 3 in the embodiment, when it is in the storage state, the circular arc-shaped memory metal band 31 extends to a certain extent along the width direction of itself, for example, to the state that the two memory metal bands 31 are completely attached, the circular arc-shaped cross-section of the memory metal band 31 is deformed into a straight line type cross-section of the memory metal band 31, at this time, it is the storage state of the electric field antenna device; when the external force limiting the reset of the antenna 3 disappears, under the action of the elastic force, the two memory metal bands 31 will restore to the shape of the circular arc, at the same time, the antenna 3 extends out of the antenna box 1, at this time, it is the use state of the electric field antenna device.

[0051] More specifically, the memory metal band 31 can be set as a SK85 steel memory metal band, SK85 is a kind of carbon steel produced in Japan, similar to the structure of a tape measure, the introduction of carbon elements gives it good bending resistance.

[0052] The electric field antenna device for microsatellites also includes a rotating shaft 2, which is rotatably connected in the antenna box 1, one end of the two memory metal bands 31 is fixedly connected to the rotating shaft 2 and can be wound circumferentially on the rotating shaft 2. Under the action of external force, the antenna 3 remains in the storage state of being wound on the rotating shaft 2 and located in the antenna box 1, at this time, the two memory metal bands 31 are attached by overcoming their memory shape, and accumulate elastic potential energy; when the external force is removed, the antenna 3 extends outward from the opening 100 to the use state under the driving of its restoring force, at this time, the two memory metal bands 31 deform to the memory shape.

[0053] The electric field antenna also includes a handle 7, which is detachably connected with the rotating shaft 2, so as to selectively rotate the rotating shaft 2 and enable the antenna 3 to switch to the storage state; the operation of rotating the rotating shaft 2 through the handle 7 is carried out on the ground. A triangular hole is formed on the rotating shaft 2, after the handle is inserted into the hole, the rotating shaft 2 can be manually rotated, and in the use state of the electric field antenna device, the handle is removed, so as to effectively ensure the compactness of the structure of the electric field antenna device, and also facilitate to reduce the prepared mass of the electric field antenna device.

[0054] In the embodiment, the inside of the shell 1 is designed with a containing cavity for installing and fixing other components. The shell 1 is also provided with an antenna outlet 100 for the extension and retraction of the tape antenna 3. The rotating shaft 2 is rotatably connected inside the shell 1, which plays a supporting and winding role for the tape antenna 3.

[0055] The tape antenna 3 comprises two memory tapes 31, and the two memory tapes 31 are oppositely arranged to provide a restoring force for the tape antenna 3 to return to the use state. When the tape is wound on the rotating shaft 2 under the action of an external force, the tape antenna 3 has a tendency to extend linearly from the antenna outlet 100 to the outside of the shell 1, so that the tape can be kept in the state of extending out of the shell 1 in the normal state. The kinetic energy of the outward extension of the tape antenna 3 is provided by the tape antenna 3 itself, without the need for other power components, thereby greatly improving the compactness of the electric field antenna device and reducing the weight of the electric field antenna device. By providing tape antennas 3 of different lengths, electric field antenna devices of different lengths can be obtained, and the flexibility of the electric field antenna device is also ensured.

[0056] The two memory tapes 31 are oppositely arranged, so that a large external force is required to bend the tape antenna 3 in the unfolded state, thereby ensuring the strength of the tape antenna 3 in the use state. Even if the tape antenna 3 is bent, it can be restored to a linear state by its own restoring force, thereby ensuring the use reliability of the tape antenna 3.

[0057] Specifically, in the embodiment, when the tape antenna 3 is in the storage state, the arc-shaped memory tape 31 extends to a certain extent along the width direction of the tape, for example, to the state where the two memory tapes 31 are completely attached. The arc-shaped memory tape 31 is deformed into a straight-line-shaped memory tape 31, which is the storage state of the electric field antenna device. When the external force limiting the reset of the tape antenna 3 disappears, the two memory tapes 31 will restore to the arc-shaped shape under the action of the elastic force, and the tape antenna 3 extends out of the shell 1 from the antenna outlet 100, which is the use state of the electric field antenna device.

[0058] More specifically, the memory tape 31 can be made of SK85 steel tape. SK85 is a carbon-containing steel produced in Japan, and the introduction of carbon elements gives it good bending resistance.

[0059] The electric field antenna further comprises a rotating component 7, which is detachably connected with the rotating shaft 2 to selectively rotate the rotating shaft 2 and switch the tape antenna 3 to the storage state. The rotating component 7 is provided as a handle that is detachably connected with the rotating shaft 2. The operation of rotating the rotating shaft 2 by the rotating component 7 is performed on the ground. A triangular hole is formed in the rotating shaft 2, and the handle is inserted into the hole to manually rotate the rotating shaft 2. In the use state of the electric field antenna device, the handle is detached, thereby effectively ensuring the compactness of the electric field antenna device and reducing the weight of the electric field antenna device.

[0060] Embodiment 2:

[0061] Reference Figures 1-4The embodiments of the present application further have the following technical solutions in addition to all the technical solutions of the above embodiments.

[0062] The micro-satellite electric field antenna device further comprises an elastic reset component 8 arranged in the antenna box 1, which accumulates the elastic force for switching the two memory metal bands 31 to the use state when the two memory metal bands 31 are switched to the storage state.

[0063] The elastic reset component 8 can continue to provide elastic force when the antenna 3 is in the storage state, help the antenna 3 to extend out of the opening 100, and improve the use reliability of the antenna 3 in the space environment.

[0064] Specifically, the elastic reset component 8 can be arranged in the same structure as the antenna and can extend out of another antenna opening on the antenna box 1, but the elastic reset component 8 only provides elastic force and does not function as the antenna 3.

[0065] In order to make the elastic reset component 8 have a relatively compact structure and be able to provide elastic force at the initial stage of the extension of the antenna 3, the elastic reset component 8 can be arranged in the following structure:

[0066] The elastic reset component 8 comprises a sliding sleeve 81 and a torsion spring 82, the sliding sleeve 81 is threadedly connected to the core shaft of the rotating shaft 2, and the outer edge of the sliding sleeve 81 is reversely slidably connected to the rotating shaft along the axis of the rotating shaft, so that when the rotating shaft 2 rotates, the sliding sleeve 81 can slide along the axis of the core shaft, thereby switching between the loaded state and the disengaged state.

[0067] The sliding sleeve 81 is provided with a lever 83, the torsion spring 82 is sleeved on the core shaft, one end of the torsion spring 82 is fixedly connected to the core shaft, and the other end of the torsion spring 82 is in a free state. In the loaded state, the sliding sleeve 81 is close to the torsion spring 82, and the lever 83 cooperates with the torsion spring 82 to load the torsion spring 82 to accumulate elastic force, at this time, the corresponding antenna 3 is wound on the last section of the rotating shaft 2; in the disengaged state, the lever 83 slides with the sliding sleeve 81 away from the torsion spring 82 to disengage the torsion spring 82, at this time, the elastic force of the torsion spring 82 is released. That is, the cooperation of the sliding sleeve 81, the rotating shaft 2 and the core shaft forms a kind of clutch structure, thereby being able to provide elastic force through the torsion spring 82 at the initial stage of the extension of the antenna 3, and improving the reliability of the extension of the antenna 3.

[0068] Specifically, the thread direction on the core shaft meets the following requirements: when the antenna 3 is wound on the rotating shaft 2, the rotating shaft 2 rotates to make the sliding sleeve 81 close to the torsion spring 82 under the cooperation of the thread; when the antenna 3 is released on the rotating shaft 2, the rotating shaft 2 rotates to make the sliding sleeve 81 away from the torsion spring 82 under the cooperation of the thread.

[0069] Alternatively, the reset assembly can provide the reset force throughout the extension of the antenna 3, for example, the reset assembly is set as a coil spring, the coil spring is arranged between the rotating shaft 2 and the mandrel, the structure is referred to the existing tape measure structure, and details are not described herein.

[0070] Embodiment 3:

[0071] With reference to Figures 1-6 In addition to the above technical solutions, the embodiments of the present application further have the following technical solutions:

[0072] The antenna 3 further comprises a connecting piece 32 adapted to connect the two ends of the two memory metal strips 31 in the width direction, so that the two memory metal strips 31 remain integrated when switching between the storage state and the use state.

[0073] In the embodiment, the connecting piece 32 is used to avoid disintegration of the two memory metal strips 31 during deformation, thereby ensuring the use reliability of the two memory metal strips 31.

[0074] The connecting piece 32 is annular, and the circumference of the connecting piece 32 is greater than or equal to the circumference of the two memory metal strips 31 after buckling, and is preferably equal; wherein the inner wall of the connecting piece 32 forms mutually connected adhesive sections and non-adhesive sections, the adhesive sections correspond to and are mutually adhered to the outer convex surfaces of one of the memory metal strips 31, and the non-adhesive sections correspond to and are mutually abutted to the outer convex surfaces of the other memory metal strip 31.

[0075] Through the above design, the adhesive sections can ensure that the connecting piece 32 is connected to one of the memory metal strips 31 without falling off, thereby ensuring that the annular connecting piece 32 is always kept outside the two memory metal strips 31, thereby limiting the basic shape of the two memory metal strips 31; the non-adhesive sections correspond to the other memory metal strip 31, and after the memory metal strip 31 deforms, the non-adhesive sections and the outer convex surfaces of the corresponding memory metal strip 31 can relatively displace, thereby ensuring that the adhesive tape 321 does not hinder the state switching process of the antenna 3, and also tightly limits the two memory metal strips 31 together.

[0076] The circumference of the connecting piece 32 should be greater than or equal to the circumference of the two memory metal strips 31 after buckling, and is preferably equal to the circumference of the two memory metal strips 31 after buckling, to ensure the stability of the connection of the two memory metal strips 31.

[0077] Specifically, when the antenna 3 is in the storage state, the two memory metal strips 31 are tightly attached together, and the adhesive sections of the connecting piece 32 are adhered to the outer convex surfaces of one of the memory metal strips 31, ensuring the stable connection of the two memory metal strips 31. The non-adhesive sections are separated from the outer convex surfaces of the other memory metal strip 31.

[0078] When the antenna 3 needs to be unfolded, the adhering surfaces of the two memory metal strips 31 gradually separate, forming two arc surfaces adhering to each other. Due to the adhesion of the adhesive section and one of the memory metal strips 31, the adhesive tape 321 can still maintain sufficient stability and connectivity, and the antenna 3 can be prevented from disintegrating. At the same time, the non-adhesive section and the other memory metal strip 31 are relatively displaced, realizing the unfolding of the antenna 3.

[0079] More specifically, when the antenna 3 is switched to the storage state, there is a certain length difference between the memory metal strip 31 of the inner ring and the memory metal strip 31 of the outer ring. Generally, when the antenna 3 is 2 m, 4 m and 6 m, the corresponding length differences are about 2.5 cm, 4 cm and 4.5 cm, respectively. This difference does not affect the use of the antenna 3, and the structure of the connecting piece 32 can allow the two antennas 3 to slide along the length direction of the antenna 3. The memory metal strip 31 at the end of the antenna 3 retains the hook of the memory metal strip itself, so as to prevent external force from causing the antenna to be completely stored in the antenna box, resulting in failure to unfold.

[0080] The connecting piece 32 includes the adhesive tape 321 and the pad 322. The pad 322 is adhered to the inner wall of the adhesive tape 321 to form a non-adhesive section, and the area of the inner wall of the adhesive tape 321 except the pad 322 forms an adhesive section.

[0081] In this embodiment, the connecting piece 32 can be made of the adhesive tape 321 and the pad. The connecting piece 32 can be completely made of the adhesive tape, which can ensure the integrity of the connecting piece 32, reduce the production cost and improve the production convenience. That is, the adhesive tape 321 and the pad 322 are both set as adhesive tapes, and the pad 322 is an adhesive tape with an adhering surface facing the adhering surface of the adhesive tape 321. Therefore, it is not necessary to specially produce a special adhesive tape 321, and it is not necessary to remove the adhesive from the adhesive tape 321.

[0082] Specifically, the adhesive tape can be set as a polyimide high-temperature resistant adhesive tape, which can withstand a temperature of 250-300 °C, which is sufficient to cope with a large temperature range of the space environment. The length of each section of the adhesive tape on the antenna 3 is 2.5 cm, and a section is adhered every 30 cm. This length can prevent the two memory metal strips 31 from loosening, and will not be too dense to affect the conductivity.

[0083] Embodiment 4:

[0084] With reference to Figures 1-10 In addition to having all the technical solutions of any of the above embodiments, the embodiments of the present application further have the following technical solutions:

[0085] The electric field antenna further comprises a limiting member 5 adapted to selectively connect the rotating shaft 2 and the antenna box 1, so as to limit the rotating angle of the rotating shaft 2 relative to the antenna box 1, and further limit the length of the antenna 3 extending out of the antenna box 1. The antenna box 1 is provided with a female limiting hole 110, and the rotating shaft 2 is provided with a male limiting hole 200, and the limiting member 5 can pass through the female limiting hole 110 and the male limiting hole 200, so as to limit the rotating angle of the rotating shaft 2 relative to the antenna box 1, and further limit the length of the antenna 3 extending out of the antenna box 1.

[0086] In the embodiment, the limiting member 5 can limit the rotation of the rotating shaft 2 when the antenna 3 is switched to the storage state, and further enable the antenna 3 to maintain the storage state.

[0087] Specifically, the limiting member 5 can be a latch, and when the latch cooperates with the female limiting hole 110 and the male limiting hole 200, the rotating shaft 2 can be limited in the freedom of rotation along the axis thereof.

[0088] The limiting member 5 is made of a fusible material, and the electric field antenna device for the micro-satellite further comprises a thermal resistor 61 provided with a fuse area for fusing the limiting member 5.

[0089] In the embodiment, the thermal resistor 61 is used to mechanically disconnect the limiting member 5 when it is necessary to switch the antenna 3 to the use state, for example, the limiting member 5 can be cut or heated to be fused by a cutting module, so as to improve the operation convenience of the electric field antenna device.

[0090] The limiting member 5 is made of a nylon rope, and the nylon rope passes through the female limiting hole 110 and the male limiting hole 200 and then passes through the fuse area.

[0091] In the embodiment, the technical solution of fusing the nylon rope by the thermal resistor 61 can be used to provide a power supply module on the antenna box 1 to supply power to the thermal resistor 61, and the thermal resistor 61 can also be electrically connected to the power supply of other parts, such as the power supply of the mother satellite.

[0092] When the thermal resistor 61 is powered on, the nylon rope will be heated and then fused, so as to achieve the purpose of releasing the antenna 3 and switching to the use state.

[0093] In the embodiment, the nylon rope has the advantages of low cost and light weight, and the cooperation form of the female limiting hole 110 and the male limiting hole 200 with the limiting member 5 is relatively representative, and other connection forms should also be within the protection scope of the embodiment.

[0094] Specifically, the nylon rope can be connected to the fuse area in the form of winding, and the nylon rope is connected end to end; and when the fuse area is powered on, the nylon rope can be reliably fused, and the antenna 3 is released as a design reference.

[0095] More specifically, the thermal resistance 61 can be provided as one or multiple in parallel. When provided as one, the cost is low and the overall weight of the disconnect module is small. When provided as multiple, the cost and overall weight of the disconnect module are increased, but the disconnect reliability of the disconnect module is improved. In view of the complexity of the space environment, two thermal resistances 61 are preferably provided.

[0096] The fusing area is located outside the antenna box 1, thereby improving the convenience and visibility of the cooperation between the limiting piece 5 and the fusing area.

[0097] Embodiment 5:

[0098] The embodiments of the present application further have the following technical solutions in addition to all the technical solutions of any of the above embodiments.

[0099] The antenna 3 is uniformly provided with multiple marking parts along the length direction thereof; a visual camera is fixedly connected to the antenna box; when the tape antenna is extended to the use state, the visual camera can recognize the marking parts to obtain the extension length of the tape antenna through the number of the recognized marking parts.

[0100] In the technical solution, the antenna 3 is uniformly provided with multiple marking parts along the length direction thereof, and the marking parts can be visual feature points with high contrast, specific patterns or coded marks, which are convenient for subsequent image recognition processing. Meanwhile, a visual camera is fixedly installed on the antenna box, and the position and angle of view of the camera are accurately calibrated to ensure that the exposed antenna part and the marking parts thereon can be continuously and clearly captured in the process that the tape antenna is pulled out from the storage state to the use state. When the user pulls out the antenna, the visual camera collects images in real time, and detects and counts the marking parts in the picture through the built-in image processing algorithm. Since the marking parts are distributed at equal intervals along the length direction of the antenna, the system can accurately calculate the actual length of the antenna extension according to the number of the recognized marking parts and the known interval between adjacent marking parts. The technology not only realizes high-precision and automatic perception of the extension length of the tape antenna, but also provides a data basis for subsequent intelligent positioning, automatic tuning or remote state monitoring, thereby significantly enhancing the intelligent level of the system and the user experience.

[0101] Embodiment 6:

[0102] With reference to Figures 1-12The embodiments of the present application provide a dipole antenna, which comprises two electric field antenna devices arranged in mirror symmetry, so that the two antennas 3 form a dipole antenna with the extending direction being in a straight line; the antenna box 1 comprises an end plate 11 and a shell 12, the end plate 11 is provided with a first through hole 120, a second through hole 130, a third through hole 140 and a fourth through hole 150, and the two antenna boxes 1 are identical in structure; the axis of the first through hole 120, the second through hole 130, the third through hole 140 and the fourth through hole 150 corresponding to one antenna box 1 is projected in the front-rear direction as points A, B, C and D; AC and BD intersect at point O, which is the projection of the rotating axis of the rotating shaft 2 in the front-rear direction, and AB is parallel to CD; the opening 100 is provided on the shell 12, when the antenna 3 is switched to the use state and passes out from the opening 100, the extending direction of the antenna 3 is parallel to the extending direction of the angle bisector of ∠AOD; the axis of the first through hole 120, the second through hole 130, the third through hole 140 and the fourth through hole 150 corresponding to the other antenna box 1 is projected in the front-rear direction as points A', B', C' and D', and when the two electric field antenna devices form a dipole antenna, ABB'A' is parallel to the straight line DCC'D'.

[0103] In the present embodiment, the electric field antenna devices of the same specification are arranged in mirror image in the occasion requiring a dipole antenna. In the design, the four through holes form a cross shape, and the angle bisector of ∠AOD is parallel to the extending direction of the unfolded antenna. In this way, when a pair of left and right mirror image electric field antenna devices are installed, as long as ABB'A' and DCC'D' in the drawing are parallel, the unfolded antenna is naturally in a straight line, thereby ensuring the use reliability of the electric field antenna device in the working condition of the dipole antenna.

[0104] In the present embodiment, the electric field antenna devices of the same specification are arranged in mirror image in the occasion requiring a dipole antenna. In the design, the four through holes form a cross shape, and the angle bisector of ∠AOD is parallel to the extending direction of the unfolded antenna. In this way, when a pair of left and right mirror image electric field antenna devices are installed, as long as ABB'A' and DCC'D' in the drawing are parallel, the unfolded antenna is naturally in a straight line, thereby ensuring the use reliability of the electric field antenna device in the working condition of the dipole antenna. Figure 10

[0105] Specifically, the position of the opening 100 on the antenna box 1 is accurately provided according to the above principle, so as to ensure that the extending direction of the antenna 3 in the use state is parallel to the extending direction of the angle bisector of ∠AOD.

[0106] It can be understood that the above embodiments 1-4 can be freely combined to form other embodiments of the present application, except for the contradictory parts.

[0107] ​In the description of the application, it should be understood that the terms "first", "second" are used only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features defined as "first", "second" can be explicitly or implicitly included one or more of the features. In the description of the application, the meaning of "a plurality of" is two or more, unless otherwise explicitly specified and limited.

[0108] In the present application, unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connecting", "fixing" and the like should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal communication of two elements or the interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0109] In the present application, unless otherwise explicitly specified and limited, the first feature is "on" or "under" the second feature, which can be direct contact between the first and second features, or indirect contact between the first and second features through an intermediate medium. Moreover, the first feature "above", "over" and "on" the second feature, can be directly above or obliquely above the first feature, or only indicates that the first feature is higher than the second feature in horizontal height. The first feature "below", "under" and "under" the second feature, can be directly below or obliquely below the first feature, or only indicates that the first feature is lower than the second feature in horizontal height.

[0110] The term "includes" or any other similar term is intended to cover non-exclusive inclusion, so that the process, article or equipment / device including a series of elements not only includes those elements, but also includes other elements not explicitly listed, or also includes the elements inherent to the process, article or equipment / device.

[0111] So far, the technical solutions of the present application have been described in combination with the preferred embodiments shown in the drawings, but those skilled in the art can easily understand that the protection scope of the present application is obviously not limited to these specific embodiments. Those skilled in the art can make equivalent changes or replacements to related technical features without departing from the principles of the present application, and the technical solutions after the changes or replacements will fall within the protection scope of the present application.

Claims

1. An electric field antenna device for microsatellites, characterized in that, include: Antenna box (1) with an opening (100) on it; Antenna (3) is disposed inside the antenna box (1); The antenna (3) includes: Two memory metal strips (31) are coupled along their own length direction and have a cross-sectional shape memory of a straight line shape with the concave inner surfaces of the arc facing each other. When the two memory metal strips (31) are wound inside the antenna box (1), they overcome their memory shape and stick together and accumulate elastic potential energy to switch to the storage state. Both can tend to extend outward from the opening (100) to the use state under the action of elastic potential energy, and in the use state, both are reset to the memory shape.

2. The electric field antenna device for microsatellites as described in claim 1, characterized in that, Also includes: The rotating shaft (2) is rotatably connected inside the antenna box (1). One end of the two memory metal strips (31) is fixedly connected to the rotating shaft (2) and can be circumferentially wound onto the rotating shaft (2).

3. The electric field antenna device for microsatellites as described in claim 2, characterized in that, It also includes an elastic reset component (8) disposed in the antenna box (1), which accumulates an elastic force to switch the two memory metal strips (31) to the use state when the two memory metal strips (31) switch to the storage state.

4. The electric field antenna device for microsatellites as described in claim 2, characterized in that, The antenna (3) also includes: The connector (32) is adapted to connect the two ends of the two memory metal strips (31) in the width direction so that they remain as one when switching between the storage state and the use state.

5. The electric field antenna device for microsatellites as described in claim 4, characterized in that, The connector (32) is ring-shaped, and the circumference of the connector (32) is greater than or equal to the circumference of the two memory metal strips (31) after they are fastened together; The inner wall of the connector (32) forms an adhesive segment and an unadhesive segment that are connected to each other. The adhesive segment is bonded to the outer convex surface of one of the memory metal strips (31), and the unadhesive segment is in contact with the outer convex surface of another memory metal strip (31).

6. The electric field antenna device for microsatellites as described in claim 5, characterized in that, Also includes: The limiting member (5) is adapted to selectively lock the angle of the rotating shaft (2) within the antenna box (1) to limit the length of the antenna (3) extending away from the antenna box (1).

7. The electric field antenna device for microsatellites as described in claim 6, characterized in that, The antenna box (1) is provided with a female limiting hole (110), and the rotating shaft (2) is provided with a female limiting hole (200). The limiting member (5) can pass through the female limiting hole (110) and the female limiting hole (200) to connect the rotating shaft (2) and the antenna box (1) in a way that selectively limits the relative rotation angle, thereby limiting the length of the antenna (3) extending out of the antenna box (1).

8. The electric field antenna device for microsatellites as described in claim 7, characterized in that, The limiting component (5) is made of a fusible material; The electric field antenna device for microsatellites also includes: Thermostat (61) is provided with a fusing zone for fusing the limiting member (5); The limiting member (5) is a nylon rope, which passes through the female limiting hole (110) and the female limiting hole (200) and then through the fusion zone.

9. The electric field antenna device based on a tape measure structure as described in any one of claims 1-8, characterized in that: The antenna (3) has multiple marking parts evenly distributed along its length; It also includes a vision camera fixedly connected to the antenna box; When the measuring tape antenna extends outward to the usage state, the vision camera can identify the markings and determine the extension length of the measuring tape antenna by the number of the identified markings.

10. A dipole antenna, characterized in that, The electric field antenna devices as described in any one of claims 1-9 are arranged in a mirror-symmetric configuration so that the two antennas (3) form a dipole antenna with their extension directions in a straight line; The antenna box (1) includes an end plate (11) and a housing (12). The end plate (11) is provided with a first through hole (120), a second through hole (130), a third through hole (140) and a fourth through hole (150). The two antenna boxes (1) have the same structure. The projections of the axes of the first through hole (120), the second through hole (130), the third through hole (140) and the fourth through hole (150) corresponding to the antenna box (1) along the front-back direction are denoted as points A, B, C and D; AC and BD intersect at point O, which is the projection of the rotation axis of the rotating shaft (2) along the front-back direction, and AB is parallel to CD; The opening (100) is formed on the housing (12). When the antenna (3) is switched to the use state, the extension direction of the antenna (3) is parallel to the extension direction of the angle bisector of ∠AOD. The projections of the axes of the first through hole (120), the second through hole (130), the third through hole (140) and the fourth through hole (150) corresponding to the other antenna box (1) along the front-back direction are denoted as points A', B', C' and D'. When the two electric field antenna devices form the dipole antenna, ABB'A' and the straight line DCC'D' are parallel.

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