A storable antenna device and communication terminal

Abstract

The present invention discloses a storable antenna device and a communication terminal, which relate to the field of wireless communication technology. The storable antenna device comprises: a floor structure; a support structure, which is arranged on the floor structure and comprises a dielectric support structure and a metal support structure; an antenna structure, which comprises a flexible dielectric layer, one end of which is detachably connected to the dielectric support structure and the other end of which is movably connected to the metal support structure through a movable part, a floor layer and a radiation layer are attached to the end surface of the flexible dielectric layer, and the floor layer is connected to the floor structure through the metal support structure and is grounded in a system; wherein the flexible dielectric layer changes the posture of its end relative to the metal support structure through the movable part, and the flexible dielectric layer is compressed toward the metal support structure in a specific posture at least in its length direction. The present invention can realize the characteristics of flexible storage and rapid deployment, which greatly improves the portability and space utilization of the communication terminal.

Description

Technical Field

[0001] The present invention relates to the technical field of wireless communications, and in particular to a storable antenna device and a communication terminal. Background Art

[0002] At present, with the rapid development of wireless network technology, in order to enhance the transmission and reception strength of wireless signals, it is usually necessary to install an antenna at the transmitting end or receiving end of the wireless signal. However, most of the existing antennas are hard antennas, which occupy a large volume and not only require a large space to place, wasting the user's precious indoor space, but also are not easy to carry and use.

[0003] It can be seen that how to provide an antenna device that occupies a small volume and saves communication terminal space is a problem that those skilled in the art need to solve. Summary of the invention

[0004] The purpose of the embodiments of the present invention is to provide a foldable antenna device to achieve the characteristics of flexible folding and rapid deployment, thereby greatly improving the portability and space utilization of the communication terminal.

[0005] In order to solve the above technical problems, an embodiment of the present invention provides a retractable antenna device, comprising:

[0006] Floor structure;

[0007] A support structure, arranged on the floor structure, comprising a dielectric support structure and a metal support structure;

[0008] The antenna structure comprises a flexible dielectric layer, one end of which is detachably connected to the dielectric support structure and the other end of which is movably connected to the metal support structure through a movable part, a floor layer and a radiation layer being attached to the end surface of the flexible dielectric layer, and the floor layer being connected to the floor structure through the metal support structure and being systematically grounded;

[0009] The flexible medium layer changes the posture of its end portion relative to the metal support structure through the movable portion, and the flexible medium layer is compressed toward the metal support structure in a specific posture at least in its length direction.

[0010] In some embodiments, the metal support structure includes a metal support rod disposed on the floor structure, and a metal round rod parallel to the floor structure is disposed on the support metal rod.

[0011] In some embodiments, the movable portion includes a metal cylinder sleeved on the outer circumference of the metal rod and rotatably arranged relative to the metal rod, the metal cylinder and the metal rod are coaxially arranged, and the end of the flexible medium layer is fixedly arranged on the cylindrical surface of the metal cylinder.

[0012] In some embodiments, the flexible dielectric layer is a flexible patch of low-loss dielectric material, the plane where the flexible dielectric layer is located is tangent to the metal cylinder, and the flexible dielectric layer is fixed at a position where the end of the flexible dielectric layer is tangent to the metal cylinder;

[0013] The metal cylinder rotates to drive the end of the flexible medium layer to change from a tangent plane to an arc surface matching the outer circumference of the metal cylinder, and guides the subsequent flexible medium layer to be wound around the outer circumference of the metal cylinder.

[0014] In some embodiments, the floor layer and the radiation layer are metal flexible patches, and can be wrapped around the outer circumference of the metal cylinder along with the flexible dielectric layer, so that the antenna structure can be rolled and placed around the metal cylinder.

[0015] In some embodiments, there are multiple metal support rods, the metal round rod is fixed between the multiple metal support rods, and the metal support rod is electrically connected to the metal round rod, and the metal round rod is electrically connected to the metal cylinder.

[0016] In some embodiments, the dielectric support structure is a square structure of low-loss dielectric material, one side of the dielectric support structure is fixed to the floor structure, and a limiting groove is opened on the other side, one end of the flexible dielectric layer is provided with a limiting protrusion matching the limiting groove, and a locking device for pressing the limiting protrusion into the limiting groove is provided on the dielectric support structure, the locking device is adjustably arranged on the dielectric support structure to adjust the degree of compression of the flexible dielectric layer, and when the flexible dielectric layer is pressed in the limiting groove, the flexible dielectric layer is arranged parallel to the floor structure.

[0017] In some embodiments, a plurality of groups of connection parts parallel to the axis of the metal cylinder are evenly distributed on the flexible medium layer, and both ends of the connection parts extend along the edges of the width direction of the flexible medium layer. At least one group of the connection parts includes a plurality of connection strips, and the space between two adjacent connection strips is hollowed out so that the adjacent connection strips are arranged at intervals, and the two sides of the connection strips are integrally connected to the flexible medium layer;

[0018] The thickness of the connection strip at the connection point with the flexible dielectric layers on both sides is the largest, the thickness of the middle part of the connection strip is the smallest, and the maximum thickness of the connection strip is less than or equal to the thickness of the flexible dielectric layer;

[0019] One side of the connecting strip is a straight surface that coincides with the plane of one side of the flexible medium layer, and the other side of the connecting strip is an intersecting surface with an angle greater than 90°;

[0020] The straight surfaces of each of the connecting strips in the same group of the connecting parts are located on the same side, and the intersecting surfaces of each of the connecting strips are located on the same side; the straight surfaces of the connecting strips in two adjacent groups of the connecting parts are arranged on different sides, and the intersecting surfaces of the connecting strips are arranged on different sides, so that within the range of the two adjacent groups of the connecting parts, the corresponding parts of the flexible medium layer are compressed in an N-shape;

[0021] The stress at the straight surface of the connecting strip is smaller than the stress at the intersection surface of the connecting strip, so that the flexible medium layer bends toward the direction of the intersection surface at the minimum thickness of the connecting strip;

[0022] The metal cylinder rotates to drive the end of the flexible medium layer to change from a parallel plane parallel to the floor structure to an inclined plane intersecting the floor structure, so as to guide the flexible medium layer to form one or more W-shaped continuous structures through the connecting part.

[0023] In some embodiments, the connecting parts are also provided on the corresponding floor layer and the radiation layer, and within the range corresponding to the floor layer and the flexible medium layer, the connecting parts on the floor layer correspond to the connecting parts on the flexible medium layer in position and posture; within the range corresponding to the radiation layer and the flexible medium layer, the connecting parts on the radiation layer correspond to the connecting parts on the flexible medium layer in position and posture.

[0024] In some embodiments, the rotation of the metal cylinder includes clockwise rotation and counterclockwise rotation. The clockwise rotation drives the end of the flexible medium layer to rotate in a direction away from the floor structure to form one or more W-shaped continuous structures located on the side of the metal cylinder away from the floor structure; the counterclockwise rotation drives the end of the flexible medium layer to rotate in a direction close to the floor structure to form one or more W-shaped continuous structures located on the side of the metal cylinder close to the floor structure, and the vertices of the W-shaped continuous structures are spaced apart from the floor structure.

[0025] In some embodiments, the floor layer includes an upper metal floor and a lower metal floor adhered to opposite surfaces of the flexible dielectric layer, the upper metal floor and the lower metal floor are located in a middle area of ​​the flexible dielectric layer, and the upper metal floor and the lower metal floor are electrically connected at the edge of the flexible dielectric layer through a metal strip.

[0026] In some embodiments, the radiation layer is located on the side of the dielectric layer facing the floor structure, the input port of the radiation layer is located at the junction of the antenna structure and the dielectric support structure, and the dielectric support structure places the electromagnetic signal input wire through the flexible dielectric layer to connect the electromagnetic signal input wire to the input port of the radiation layer.

[0027] In some embodiments, the upper metal floor, the flexible dielectric layer, and the lower metal floor have the same length, the width of the upper metal floor is greater than the width of the lower metal floor, and the orthographic projection of the radiation layer in the direction of the upper metal floor at least partially overlaps with the upper metal floor.

[0028] In some embodiments, at least one branch is provided on the radiation layer to adjust the resonant frequency and radiation efficiency of the radiator.

[0029] A communication terminal comprises the above-mentioned retractable antenna device.

[0030] It can be seen from the above technical solution that the beneficial effect of the present invention is that when the antenna is in use, the antenna structure can be quickly unfolded and fixed on the dielectric support structure and the metal support structure to realize the dual-band antenna function of the antenna WLAN; when the antenna is not in use, the posture of the antenna structure is changed by the movable part, and the antenna structure is compressed in a specific posture, so as to realize the storage of the antenna structure, which greatly improves the portability and space utilization of the communication terminal. At the same time, the antenna structure maintains its invariance and signal transmission is not damaged during the unfolding and compression process. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] In order to more clearly illustrate the embodiments of the present invention, the following briefly introduces the drawings required for use in the embodiments. 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 creative work.

[0032] Figure 1 A three-dimensional schematic diagram of a retractable antenna device provided in an embodiment of the present invention;

[0033] Figure 2 for Figure 1 A partial enlarged schematic diagram;

[0034] Figure 3 A schematic diagram of a dielectric support structure and a metal support structure provided by an embodiment of the present invention;

[0035] Figure 4 A schematic diagram of a metal cylindrical structure provided in an embodiment of the present invention;

[0036] Figure 5 A schematic diagram of an antenna structure provided in an embodiment of the present invention;

[0037] Figure 6 A top view of the antenna structure provided by an embodiment of the present invention;

[0038] Figure 7 A bottom view of the antenna structure provided by an embodiment of the present invention;

[0039] Figure 8 A schematic diagram of another antenna structure provided by an embodiment of the present invention;

[0040] Fig. 9 A schematic diagram of the structure of the connection bar provided in an embodiment of the present invention;

[0041] Fig.10 A schematic diagram of the folding structure of the antenna structure provided by an embodiment of the present invention under the action of the connecting part;

[0042] Fig.11 A schematic diagram of scattering parameter simulation of a retractable antenna device in an unfolded state provided by an embodiment of the present invention;

[0043] Fig.12 A schematic diagram of the simulation of the total working efficiency of the retractable antenna device provided by an embodiment of the present invention in the unfolded state.

[0044] In the figure:

[0045] 1-floor structure; 2-support structure; 21-dielectric support structure; 22-metal support structure; 221-metal support rod; 222-metal round rod; 223-metal cylinder; 3-antenna structure; 31-flexible dielectric layer; 311-connecting part; 3111-connecting strip; 3112-intersecting surface; 3113-straight surface; 32-upper metal floor; 33-lower metal floor; 34-radiation layer; 341-input port; 342-branch. DETAILED DESCRIPTION

[0046] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. 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 creative work are within the scope of protection of the present invention.

[0047] In order to enable those skilled in the art to better understand the solution of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0048] Next, a retractable antenna device provided by an embodiment of the present invention is described in detail. Figure 1 , Figure 1 A three-dimensional schematic diagram of a retractable antenna device provided in an embodiment of the present invention shows that the device includes a floor structure 1, a supporting structure 2 and an antenna structure 3. The floor structure 1 serves as a carrier of the entire antenna and can be a metal casing of a communication terminal or a metal plate fixedly connected to the metal casing, thereby realizing system grounding of the antenna device.

[0049] The support structure 2 is arranged on the floor structure 1, and the support structure 2 includes a dielectric support structure 21 and a metal support structure 22. Under the support of the support structure 2, the antenna structure 3 can be stably arranged on the support structure 2. Of course, the antenna structure 3 only needs to be stably arranged when it is unfolded and in a normal working state, and there are no excessive restrictions on other states.

[0050] Specifically, please refer to Figure 2 and Figure 5 The antenna structure 3 includes a flexible dielectric layer 31, one end of which is detachably connected to the dielectric support structure 21 and the other end of which is movably connected to the metal support structure 22 through a movable part. The flexible dielectric layer 31 is the main carrier of the antenna structure 3 and can be used to carry the floor layer and the radiation layer 34. Furthermore, the floor layer and the radiation layer 34 are attached to the end surface of the flexible dielectric layer. The radiation layer 34 is an important component of the antenna structure 3 and can be used to send and receive electromagnetic wave signals, thereby realizing the transmission of communication signals. The floor layer is connected to the floor structure 1 through the metal support structure 22, thereby realizing system grounding.

[0051] It should be pointed out that the present invention emphasizes how to reduce the space occupied by the antenna device. Therefore, it is necessary to compress the antenna structure 3 to reduce the space occupied by the antenna device. Of course, when the antenna device is in normal use, it is necessary to ensure that it has sufficient expanded volume. When not in use, it can be compressed in length or width to reduce the space occupied by the antenna.

[0052] Specifically, in order to achieve compression of the antenna structure 3, the present invention requires that the flexible dielectric layer 31 changes the posture of its end relative to the metal support structure 22 through the movable part, so that the flexible dielectric layer 31 is compressed toward the metal support structure 22 in a specific posture at least in its length direction. In other words, the movable part has at least two states during the activity process, one state corresponds to the normal working state of the antenna structure 3, at which time the movable part needs to keep the antenna structure 3 parallel to the floor structure 1; the other state corresponds to the compressed state of the antenna structure 3, at which time it is necessary to cooperate with the antenna structure 3 to achieve compression in the length or width direction.

[0053] There may be various compression forms for the antenna structure 3 , such as curling compression, folding compression, etc., including but not limited to the above forms, so as to achieve the storage of the antenna structure 3 .

[0054] For example, in curling and compression, the movable part can be rotated so that the flexible dielectric layer 31 is wrapped around the movable part, so that the flexible dielectric layer 31 gradually changes from a state parallel to the floor structure 1 to a state wrapped around the movable part, thereby realizing the curling and storage of the antenna structure 3; for another example of folding and compression, the movable part can be rotated so that the flexible dielectric layer 31 gradually moves from a state parallel to the floor structure 1 to a state perpendicular to each other, and a wave-shaped bending is realized through a specific structure on the flexible dielectric layer 31, thereby reducing the overall length of the flexible dielectric layer 31 in length or width direction to form a folded and stored state.

[0055] Since the radiation layer 34 and the floor layer are arranged on the flexible dielectric layer 31, the radiation layer 34 and the floor layer also need to cooperate to achieve compression and storage during the compression and storage of the flexible dielectric layer 31, so as to avoid structural dislocation of the antenna structure 3. Therefore, the flexible dielectric layer 31, the radiation layer 34 and the floor layer can all be set as metal sheet structures, and in particular, the flexible dielectric layer 31 is a sheet of low-loss metal material, so that the antenna structure 3 meets the deformation requirements when curled, and further the antenna structure 3 maintains the characteristics of invariance and unimpaired signal transmission during the unfolding and compression process.

[0056] In summary of the above embodiments, when the antenna is in use, the antenna structure 3 of the present invention can be quickly unfolded and fixed on the dielectric support structure 21 and the metal support structure 22, so as to realize the dual-band antenna function of the antenna WLAN; when the antenna is not in use, the posture of the antenna structure 3 is changed by the movable part, and the antenna structure 3 is compressed in a specific posture, so as to realize the storage of the antenna structure 3, which greatly improves the portability and space utilization of the communication terminal.

[0057] In some embodiments, please refer to Figure 3 The metal support structure 22 includes a metal support rod 221 disposed on the floor structure 1, and a metal round rod 222 parallel to the floor structure 1 is disposed on the support metal rod. It can be seen that the metal support rod 221 can be electrically connected to the floor structure 1 to achieve system grounding. Similarly, the metal round rod 222 is electrically connected to the metal support rod 221 to achieve system grounding. There are no excessive restrictions on the specific arrangement of the support rod and the metal round rod 222.

[0058] The above mentioned movable part can rotate. Therefore, the movable part in this embodiment includes a metal cylinder 223 which is sleeved on the outer circumference of the metal rod 222 and rotated relative to the metal rod 222. Figure 4The metal cylinder 223 is coaxially arranged with the metal rod 222 to ensure that the metal cylinder 223 can rotate concentrically with the metal rod 222. On this basis, the end of the flexible dielectric layer 31 is fixedly arranged with the cylindrical surface of the metal cylinder 223, so that the rotation of the metal cylinder 223 drives the flexible dielectric layer 31 to be wound around the outer periphery of the metal cylinder 223. Of course, the radiation layer 34 and the floor layer on the flexible dielectric layer 31 can also be wound around the metal cylinder 223 with the flexible dielectric layer 31, thereby realizing the curling and storage of the antenna structure 3.

[0059] It can be seen from the above embodiments that since the flexible dielectric layer 31 is a metal sheet, the metal forms a flexible patch when it is relatively thin. At the same time, the flexible dielectric layer 31, as a flexible patch of low-loss dielectric material, can still have good recovery performance after a certain degree of deformation, thereby ensuring the signal radiation transmission performance of the antenna structure 3.

[0060] In some embodiments, in order to facilitate the winding of the flexible dielectric layer 31 around the metal cylinder 223, the plane where the flexible dielectric layer 31 is located can be set tangent to the metal cylinder 223. The tangent setting here means that when the flexible dielectric layer 31 is in the unfolded state, the plane of the flexible dielectric layer 31 can be tangent to the metal cylinder 223, and the end of the flexible dielectric layer 31 is fixed at the tangent position to the metal cylinder 223. The flexible dielectric layer 31 can be directly wound around the metal cylinder 223 simply by rotating.

[0061] In addition, when storing the antenna structure 3, the antenna structure 3 needs to be disassembled and separated from the dielectric support structure 21. As for the radiation layer 34 and the floor layer on the flexible dielectric layer 31, the actions of the two are synchronized with the flexible dielectric layer 31, that is, the floor layer and the radiation layer 34 are metal flexible patches, and can be wrapped around the outer circumference of the metal cylinder 223 with the flexible dielectric layer 31, so as to realize the curling and storage of the antenna structure 3 around the metal cylinder 223, which will not be described in detail here, and the specific setting method of the flexible dielectric layer 31 can be referred to.

[0062] Furthermore, before being rolled up and stored, the flexible medium layer 31 is parallel to the floor structure 1, that is, the flexible medium layer 31 is tangent to the metal cylinder 223. As the flexible medium layer 31 separates from the medium support structure 21, the end of the flexible medium layer 31 is changed from a tangent plane to an arcuate surface matching the outer circumference of the metal cylinder 223 by rotating the metal cylinder 223, and the subsequent flexible medium layer 31 is guided to be wound around the outer circumference of the metal cylinder 223 in an arc-shaped posture to achieve curling and storage.

[0063] In addition, in order to improve the stability of the antenna structure 3 when in use, the number of metal support rods 221 can be set to multiple, and the metal round rod 222 is fixed between the multiple metal support rods 221 to form a stable fixed frame structure, and ensure that the metal support rod 221 is electrically connected to the metal round rod 222, and the metal round rod 222 is electrically connected to the metal cylinder 223. On this basis, since a floor layer is provided on the flexible dielectric layer 31, the floor layer can be electrically connected to the floor structure 1 by means of metal connecting wires, etc., so as to achieve the purpose of system grounding.

[0064] In some embodiments, the dielectric support structure 21 is a square structure of a low-loss dielectric material. Figure 3 or Figure 4 , one side of the dielectric support structure 21 is fixed on the floor structure 1, and a limiting groove (not shown in the figure) is provided on the other side. A limiting protrusion matching the limiting groove is provided at one end of the flexible dielectric layer 31. A locking device for pressing the limiting protrusion into the limiting groove is provided on the dielectric support structure 21. The locking device is adjustably provided on the dielectric support structure 21 to adjust the degree of pressing of the flexible dielectric layer 31, and when the flexible dielectric layer 31 is pressed into the limiting groove, the flexible dielectric layer 31 is arranged parallel to the floor structure 1. That is, when the locking device locks the flexible dielectric layer 31 into the dielectric support structure 21, the antenna structure 3 is in a fully extended state, and the movable part should be in a rotational limiting state at this time to prevent the transition of the movable part from returning to its original position and causing instability of the antenna structure 3.

[0065] For the locking device, the limiting protrusion can be pressed by bolts, or a snap-fit ​​structure can be provided on the limiting groove and the limiting protrusion to achieve limiting snap-fit ​​at a specified position, thereby making the antenna structure 3 and the dielectric support structure 21 detachably connected.

[0066] The above has introduced the curling storage, that is, the curling storage is achieved by the thin sheet-like flexible dielectric layer 31, the radiation layer 34 and the floor layer, and the antenna's own characteristics after unfolding and compression are not affected. Here, the folding storage is introduced, as follows.

[0067] Please refer to Figure 8 Since folding and storage requires the antenna structure 3 to be relatively bent, the present invention evenly distributes multiple groups of connecting parts 311 parallel to the axis of the metal cylinder 223 on the flexible dielectric layer 31, and the two ends of the connecting parts 311 extend along the width direction of the flexible dielectric layer 31 to the edges, so that the flexible dielectric layer 31 can be folded in the length direction; of course, if the flexible dielectric layer 31 is folded in the width direction, the two ends of the connecting parts 311 can be extended to the edges along the length direction of the flexible dielectric layer 31.

[0068] At least one group of connection parts 311 includes a plurality of connection strips 3111, and the space between two adjacent connection strips 3111 is hollowed out so that the adjacent connection strips 3111 are spaced apart, thereby reducing the bending stress at the connection parts 311, making it easier for the flexible dielectric layer 31 to bend at the connection parts 311. Since the flexible dielectric layer 31 is a metal sheet and the connection strips 3111 are part of the flexible dielectric layer 31, the connection strips 3111 also have a high recovery performance, thereby avoiding the problem of being unable to return to position after bending. At the same time, the connection strips 3111 can also ensure that the flexible dielectric layer 31 is an integral structure to ensure that the performance of the flexible dielectric layer 31 itself will not change.

[0069] For further information, please refer to Fig. 9 The thickness of the connection between the connecting strip 3111 and the flexible dielectric layers 31 on both sides is the largest, and the thickness of the middle part of the connecting strip 3111 is the smallest. A groove concave inward is formed in the middle part of the connecting strip 3111. At the same time, the maximum thickness of the connecting strip 3111 is less than or equal to the thickness of the flexible dielectric layer 31, thereby ensuring that the bending stress at the connecting strip 3111 is significantly lower than the bending stress at other parts of the flexible dielectric layer 31, and the bending stress in the middle part of the connecting strip 3111 is the smallest.

[0070] In addition, one side of the connecting strip 3111 is a straight surface 3113 that coincides with the plane of one side of the flexible dielectric layer 31, and the other side of the connecting strip 3111 is an intersection surface 3112 with an angle greater than 90°, and the concave portion at the intersection surface 3112 can provide sufficient space for the flexible dielectric layer 31 to bend. Of course, there are no excessive restrictions on the maximum bending angle of the flexible dielectric layer 31 at the connecting portion 311, which specifically depends on the bending characteristics of the flexible dielectric layer 31 itself, ensuring that the maximum bending stress of the flexible dielectric layer 31 is not exceeded, and ensuring that it can return to its original state.

[0071] The straight surface 3113 of each connecting strip 3111 in the same group of connecting parts 311 is located on the same side, and the intersecting surface 3112 of each connecting strip 3111 is located on the same side, that is, when the flexible medium layer 31 is bent at a group of connecting parts 311, the straight surfaces 3113 of the connecting strips 3111 are arranged in the same direction, and the intersecting surfaces 3112 of the connecting strips 3111 are arranged in the same direction, so that the bending directions or bending trends of multiple connecting strips 3111 in a group of connecting parts 311 are consistent.

[0072] The straight surfaces 3113 of the connecting strips 3111 in the two adjacent groups of connecting parts 311 are arranged on opposite sides, and the intersecting surfaces 3112 of the connecting strips 3111 are arranged on opposite sides; based on the above embodiment, it can be known that the bending directions of the flexible dielectric layer 31 on both sides of the two adjacent connecting parts 311 are opposite, so that within the range of the two adjacent groups of connecting parts 311, the corresponding part of the flexible dielectric layer 31 is compressed in an N shape. For details, please refer to Fig.10Of course, if there is only one set of connecting portions 311, then there will be no two adjacent sets of connecting portions 311, and the flexible dielectric layer 31 will form a V-shaped bend.

[0073] In addition, since the thickness of the two ends of the intersection surface 3112 of the connecting strip 3111 is large and the thickness of the middle part is small, an inwardly concave groove is formed, which will cause a certain bending stress to be formed here, and the bending stress here is significantly greater than the stress of the straight surface 3113, so that the flexible dielectric layer 31 can be more easily bent in the direction of the intersection surface 3112 at the minimum thickness of the connecting strip 3111. In other words, due to the difference in thickness between the middle part and the two ends of the connecting strip 3111, when processing the flexible dielectric layer 31, the stress on the side of the intersection surface 3112 can be increased, so that the flexible dielectric layer 31 is in a bent state in a natural state. If it is necessary to unfold, the bending stress of the intersection surface 3112 is overcome by external force to straighten the flexible dielectric layer 31. When it is necessary to store, the flexible dielectric layer 31 only needs to be disassembled and separated from the dielectric support structure 21, and it can be automatically stored into a V-shaped or N-shaped structure under the action of the bending stress at the intersection surface 3112.

[0074] Of course, when the flexible medium layer 31 is stored, the cooperation of the movable part is required, that is, the metal cylinder 223 rotates to drive the end of the flexible medium layer 31 to change from a parallel plane parallel to the floor structure 1 to an inclined plane intersecting the floor structure 1, so that the end of the flexible medium layer 31 first meets the requirements of folding and storage, and ensures that the flexible medium layer 31 has a good storage position after storage. For multiple connecting parts 311, one or more W-shaped continuous structures can be formed after the flexible medium layer 31 is folded and stored.

[0075] The corresponding floor layer and the radiation layer 34 are also provided with a connection part 311, and within the range where the floor layer and the flexible medium layer 31 correspond, the connection part 311 on the floor layer corresponds to the connection part 311 on the flexible medium layer 31 in position and posture; the posture correspondence here includes the direction correspondence of the straight surface 3113 and the intersection surface 3112 of the connection strip 3111 in the connection part 311. Similarly, within the range where the radiation layer 34 and the flexible medium layer 31 correspond, the connection part 311 on the radiation layer 34 corresponds to the connection part 311 on the flexible medium layer 31 in position and posture.

[0076] In addition, for the above-mentioned folding and storing method, the rotation direction and amplitude of the metal cylinder 223 determine the position of the flexible medium layer 31 after storage. For example, when the metal cylinder 223 is rotated clockwise to drive the end of the flexible medium layer 31 to rotate in a direction away from the floor structure 1, the flexible medium layer 31 forms one or more W-shaped continuous structures located on the side of the metal cylinder 223 away from the floor structure 1; that is, if the floor structure 1 is regarded as the lower structure, the metal cylinder 223 rotates clockwise so that the flexible medium layer 31 is located on the upper side of the metal cylinder 223 after storage. On the contrary, if the metal cylinder 223 is rotated counterclockwise to drive the end of the flexible medium layer 31 to rotate in a direction close to the floor structure 1, the flexible medium layer 31 forms one or more W-shaped continuous structures located on the side of the metal cylinder 223 close to the floor structure 1 after storage, that is, located in the space between the metal cylinder 223 and the floor structure 1 after storage. Of course, at this time, the apex of the W-shaped continuous structure of the flexible medium layer 31 after storage is spaced from the floor structure 1 to prevent wear and tear.

[0077] Please refer to Figure 6 and Figure 7 The floor layer specifically includes an upper metal floor 32 and a lower metal floor 33 attached to opposite surfaces of the flexible dielectric layer 31. The upper metal floor 32 and the lower metal floor 33 are located in the middle area of ​​the flexible dielectric layer 31, and the upper metal floor 32 and the lower metal floor 33 are electrically connected through a metal strip at the edge of the flexible dielectric layer 31. At the same time, at least one of the upper metal floor 32 and the lower metal floor 33 is fixedly connected to the metal cylinder 223, so that the upper metal floor 32 and the lower metal floor 33 maintain system grounding.

[0078] In some embodiments, the radiation layer 34 is located on the side of the dielectric layer facing the floor structure 1, and the input port 341 of the radiation layer 34 is located at the junction of the antenna structure 3 and the dielectric support structure 21. The dielectric support structure 21 places the electromagnetic signal input wire through the flexible dielectric layer 31 so that the electromagnetic signal input wire is connected to the input port 341 of the radiation layer 34.

[0079] In some embodiments, the upper metal floor 32, the flexible dielectric layer 31, and the lower metal floor 33 are of the same length and are fixedly connected. The above-mentioned limit block can be set not only on the flexible dielectric layer 31, but also on the upper metal floor 32 or the lower metal floor 33, and there are no excessive restrictions here. The width of the upper metal floor 32 is greater than the width of the lower metal floor 33, and the positive projection of the radiation layer 34 in the direction of the upper metal floor 32 at least partially overlaps with the upper metal floor 32, so that the metal floor can radiate backwards of the antenna, increase the front-to-back radiation ratio, and thus shape the antenna's directional diagram. At the same time, the reflection and diffusion of the electromagnetic wave signal of the radiation layer 34 can be enhanced.

[0080] In some embodiments, please refer to Figure 7 , at least one branch 342 is provided on the radiation layer 34 to adjust the resonant frequency and radiation efficiency of the radiator. In the disclosed embodiment, the branch 342 in the antenna is mainly used to adjust the impedance matching of the antenna, achieve decoupling, and affect the performance of the antenna. For example, the branch 342 can affect the impedance of the antenna by changing the inductance and capacitance of the antenna; for another example, an increase in the length of the branch 342 will lead to a decrease in the resonant frequency, while an increase in the height of the branch 342 can improve the total radiation efficiency. Changes in these parameters will affect the resonant frequency and radiation efficiency of the antenna, and thus affect the coverage and signal quality of the antenna. The specific setting method of the branch 342 is not restricted here, and all fall within the protection scope of this application.

[0081] Fig.11 A schematic diagram of scattering parameter simulation of a retractable antenna device in an unfolded state provided by an embodiment of the present invention; Fig.12 A schematic diagram of the simulation of the total working efficiency of the foldable antenna device in the unfolded state provided by the embodiment of the present invention. It can be seen that when the antenna structure 3 is unfolded and installed, the performance of the S11 (return loss coefficient) parameter less than -10dB can be achieved in the WLAN (wireless local area network) frequency band 2400MHz-2480MHz and the frequency band 5150MHz-5875MHz, and the overall radiation efficiency is greater than 80%, so that the antenna device of this embodiment achieves good WLAN communication transceiver performance; at the same time, it has the characteristics of flexible storage and rapid deployment, and ensures that the antenna structure 3 remains unchanged during the unfolding and compression process, and the signal transmission is not damaged.

[0082] In addition, the present invention also discloses a communication terminal, which includes the above-mentioned retractable antenna device, so that the communication terminal also has good communication transceiver performance and sky-to-sky communication capability, and greatly improves the portability and space utilization of the communication terminal.

[0083] The above is a detailed introduction to a retractable antenna device, namely a communication terminal, provided by the present invention. Specific examples are used herein to illustrate the principles and implementation methods of the present invention. The description of the above embodiments is only used to help understand the method of the present invention and its core idea. It should be pointed out that for ordinary technicians in this technical field, without departing from the principles of the present invention, several improvements and modifications can be made to the present invention, and these improvements and modifications also fall within the scope of protection of the claims of the present invention.

Claims

1. A retractable antenna device, characterized in that: include: Floor structure (1); A support structure (2) is arranged on the floor structure (1), comprising a medium support structure (21) and a metal support structure (22); The antenna structure (3) comprises a flexible dielectric layer (31) having one end detachably connected to the dielectric support structure (21) and the other end movably connected to the metal support structure (22) via a movable portion, a floor layer and a radiation layer (34) being attached to an end surface of the flexible dielectric layer (31), and the floor layer being connected to the floor structure (1) via the metal support structure (22) and being systemically grounded; The flexible medium layer (31) changes the posture of its end relative to the metal support structure (22) through the movable portion, and compresses the flexible medium layer (31) toward the metal support structure (22) in a specific posture at least in its length direction; the metal support structure (22) comprises a metal support rod (221) provided on the floor structure (1); the movable portion comprises a metal cylinder (223) sleeved on the outer circumference of the metal round rod (222) and rotatably arranged relative to the metal round rod (222); and the end of the flexible medium layer (31) is fixedly arranged on the cylindrical surface of the metal cylinder (223).

2. The retractable antenna device according to claim 1, characterized in that: The supporting metal rod is provided with a metal round rod (222) parallel to the floor structure (1).

3. The retractable antenna device according to claim 2, characterized in that: The metal cylinder (223) and the metal round rod (222) are coaxially arranged.

4. The retractable antenna device according to claim 3, characterized in that: The flexible dielectric layer (31) is a flexible patch of low-loss dielectric material, the plane where the flexible dielectric layer (31) is located is tangent to the metal cylinder (223), and the end of the flexible dielectric layer (31) is fixed at a position where it is tangent to the metal cylinder (223); The metal cylinder (223) rotates to drive the end of the flexible medium layer (31) to change from a tangent plane to an arcuate surface matching the outer circumference of the metal cylinder (223), and guides the subsequent flexible medium layer (31) to be wound around the outer circumference of the metal cylinder (223).

5. The retractable antenna device according to claim 4, characterized in that: The floor layer and the radiation layer (34) are metal flexible patches, and can be wound around the outer circumference of the metal cylinder (223) along with the flexible dielectric layer (31), so as to achieve the antenna structure (3) being rolled and placed around the metal cylinder (223).

6. The retractable antenna device according to claim 3, characterized in that: There are a plurality of metal support rods (221), the metal round rod (222) is fixedly disposed between the plurality of metal support rods (221), the metal support rod (221) is electrically connected to the metal round rod (222), and the metal round rod (222) is electrically connected to the metal cylinder (223).

7. The retractable antenna device according to claim 1, characterized in that: The dielectric support structure (21) is a square structure of a low-loss dielectric material. One side of the dielectric support structure (21) is fixed to the floor structure (1), and the other side is provided with a limiting groove. One end of the flexible dielectric layer (31) is provided with a limiting protrusion matching the limiting groove, and a locking device for pressing the limiting protrusion into the limiting groove is provided on the dielectric support structure (21). The locking device is adjustably arranged on the dielectric support structure (21) to adjust the degree of pressing of the flexible dielectric layer (31), and when the flexible dielectric layer (31) is pressed into the limiting groove, the flexible dielectric layer (31) is arranged parallel to the floor structure (1).

8. The retractable antenna device according to claim 3, characterized in that: A plurality of groups of connection parts (311) parallel to the axis of the metal cylinder (223) are evenly distributed on the flexible medium layer (31), and at both ends of the connection parts (311) are located at edges extending in the width direction of the flexible medium layer (31), and at least one group of the connection parts (311) comprises a plurality of connection strips (3111), and two adjacent connection strips (3111) are hollowed out so that adjacent connection strips (3111) are arranged at intervals, and two sides of the connection strips (3111) are integrally connected to the flexible medium layer (31); The thickness of the connection strip (3111) at the connection with the flexible medium layers (31) on both sides is the largest, the thickness of the middle of the connection strip (3111) is the smallest, and the maximum thickness of the connection strip (3111) is less than or equal to the thickness of the flexible medium layer (31).

9. The retractable antenna device according to claim 8, characterized in that: The straight surfaces (3113) of each of the connecting strips (3111) in the same group of the connecting parts (311) are located on the same side, and the intersecting surfaces (3112) of each of the connecting strips (3111) are located on the same side; the straight surfaces (3113) of the connecting strips (3111) in two adjacent groups of the connecting parts (311) are arranged on different sides, and the intersecting surfaces (3112) of the connecting strips (3111) are arranged on different sides, so that within the range of the two adjacent groups of the connecting parts (311), the corresponding parts of the flexible medium layer (31) are compressed in an N-shape; The stress at the straight surface (3113) of the connecting strip (3111) is smaller than the stress at the intersection surface (3112) of the connecting strip (3111), so that the flexible medium layer (31) bends in the direction of the intersection surface (3112) at the minimum thickness of the connecting strip (3111); The metal cylinder (223) rotates to drive the end of the flexible medium layer (31) to change from a parallel surface parallel to the floor structure (1) to an inclined surface intersecting the floor structure (1), so as to guide the flexible medium layer (31) to form one or more W-shaped continuous structures through the connecting portion (311).

10. The retractable antenna device according to claim 9, characterized in that: The connecting portion (311) is also provided on the corresponding floor layer and the radiation layer (34), and within the range corresponding to the floor layer and the flexible medium layer (31), the connecting portion (311) on the floor layer corresponds to the connecting portion (311) on the flexible medium layer (31) in position and posture; and within the range corresponding to the radiation layer (34) and the flexible medium layer (31), the connecting portion (311) on the radiation layer (34) corresponds to the connecting portion (311) on the flexible medium layer (31) in position and posture.

11. The retractable antenna device according to claim 9, characterized in that: The rotation of the metal cylinder (223) includes clockwise rotation and counterclockwise rotation. The clockwise rotation drives the end of the flexible medium layer (31) to rotate in a direction away from the floor structure (1), so as to form one or more W-shaped continuous structures located on the side of the metal cylinder (223) away from the floor structure (1); the counterclockwise rotation drives the end of the flexible medium layer (31) to rotate in a direction close to the floor structure (1), so as to form one or more W-shaped continuous structures located on the side of the metal cylinder (223) close to the floor structure (1), and the vertices of the W-shaped continuous structures are spaced apart from the floor structure (1).

12. The retractable antenna device according to any one of claims 1 to 11, characterized in that: The floor layer comprises an upper metal floor (32) and a lower metal floor (33) attached to opposite surfaces of the flexible dielectric layer (31); the upper metal floor (32) and the lower metal floor (33) are located in a middle region of the flexible dielectric layer (31), and the upper metal floor (32) and the lower metal floor (33) are electrically connected at the edge of the flexible dielectric layer (31) via a metal strip.

13. The retractable antenna device according to claim 12, characterized in that: The radiation layer (34) is located on a side of the dielectric layer facing the floor structure (1); an input port (341) of the radiation layer (34) is located at the junction of the antenna structure (3) and the dielectric support structure (21); and the dielectric support structure (21) places an electromagnetic signal input wire through the flexible dielectric layer (31) so that the electromagnetic signal input wire is connected to the input port (341) of the radiation layer (34).

14. The retractable antenna device according to claim 13, characterized in that: The upper metal floor (32), the flexible dielectric layer (31), and the lower metal floor (33) have the same length, the width of the upper metal floor (32) is greater than the width of the lower metal floor (33), and the orthographic projection of the radiation layer (34) in the direction of the upper metal floor (32) at least partially overlaps with the upper metal floor (32).

15. A communication terminal, characterized in that: The invention comprises the retractable antenna device as described in any one of claims 1 to 14.

Images