Antenna, antenna device and wireless communication equipment

Abstract

The utility model discloses an antenna, an antenna device and wireless communication equipment, and relates to the technical field of wireless communication, the antenna comprises a dielectric plate, a floor, a concave folded dipole and a loop antenna assembly; the concave folded dipole is printed on the upper surface of the dielectric plate, the loop antenna assembly is arranged on the lower surface of the dielectric plate, the upper surface of the dielectric plate is arranged on one side far away from the floor, and the lower surface of the dielectric plate is arranged on one side close to the floor. On the premise that the performance of the antenna is ensured, the requirements of modern compact wireless communication equipment are met.

Description

Technical Field

[0001] The utility model relates to the technical field of wireless communication, and particularly relates to an antenna, an antenna device and a wireless communication device. Background Art

[0002] With the continuous development of wireless communication technology, the miniaturization and integration of wireless communication devices have become the core direction leading the R & D of relevant enterprises. Among them, as a crucial component in wireless communication devices, the design optimization of the antenna is directly related to the overall performance of the device.

[0003] However, traditional antenna design methods, such as the complex periodic HIS (High Impedance Surface) structure loaded on the ground plane, due to their large volume, complex structure, and easy generation of spatial and electromagnetic interference with the circuit components of the PCB board with high-density layout, not only seriously affect the antenna performance, but also are difficult to meet the requirements of modern compact wireless communication devices. Summary of the Utility Model

[0004] The main purpose of the utility model is to propose an antenna, an antenna device and a wireless communication device, aiming to meet the requirements of modern compact wireless communication devices on the premise of ensuring the performance of the antenna.

[0005] To achieve the above object, the utility model proposes an antenna, which comprises a dielectric plate, a ground plane, a concave folded dipole and a loop antenna assembly;

[0006] The concave folded dipole is printed on the upper surface of the dielectric plate, the loop antenna assembly is arranged on the lower surface of the dielectric plate, the upper surface of the dielectric plate is arranged on one side far from the ground plane, and the lower surface of the dielectric plate is arranged on one side close to the ground plane.

[0007] In one embodiment, the loop antenna assembly at least comprises a rectangular loop antenna and a parasitic loop antenna, and the parasitic loop antenna is nested in the rectangular loop antenna.

[0008] In one embodiment, the loop antenna assembly further comprises an antenna input port;

[0009] The parasitic loop antenna is in a concave ring shape, and the antenna input port is arranged on the concave surface side of the rectangular loop antenna far from the parasitic loop antenna;

[0010] The position coordinate point of the antenna input port arranged on the rectangular loop antenna is arranged on the mirror symmetry line of the concave surface.

[0011] In one embodiment, the mirror symmetry line of the concave surface coincides with the mirror symmetry line of the concave folded dipole.

[0012] In one embodiment, the concave folded dipole at least includes a left-arm dipole, a right-arm dipole, and a horizontal dipole;

[0013] The left-arm dipole and the right-arm dipole are mirror-symmetrical. The left-arm dipole is vertically disposed at the first end of the horizontal dipole, and the right-arm dipole is vertically disposed at the second end of the horizontal dipole;

[0014] The left-arm dipole is electrically connected to the first end of the horizontal dipole, and the second end of the horizontal dipole is electrically connected to the right-arm dipole.

[0015] In one embodiment, the left-arm dipole is provided with a hollow first slit, the right-arm dipole is provided with a second slit that is mirror-symmetrical to the first slit, the horizontal dipole is provided with a hollow third slit, and the first slit communicates with the second slit through the third slit.

[0016] In one embodiment, the slit width of the first slit is the same as that of the second slit, and the width of the third slit is smaller than the slit width of the first slit.

[0017] In one embodiment, the antenna further includes four support columns, and the dielectric plate is in the shape of a rectangular plate;

[0018] The four support columns are correspondingly disposed at the four corners of the dielectric plate for mounting and fixing with the floor.

[0019] In addition, the present invention further provides an antenna device, and the antenna device at least includes the antenna described in any one of the above.

[0020] In addition, the present invention further provides a wireless communication device, and the antenna device at least includes the above antenna device.

[0021] The present invention provides an antenna with a miniaturized and low-profile design. This antenna ingeniously integrates a dielectric plate, a floor, a low-profile concave folded dipole, and a loop antenna component. The concave folded dipole printed on the upper surface of the dielectric plate and the loop antenna component disposed on the lower surface work together to achieve excellent antenna performance while maintaining an extremely small physical size. In particular, by introducing the loop antenna component, the large capacitive reactance component introduced by the floor is effectively compensated, so that the inductance of the loop antenna component can cancel the capacitance of the floor, thereby effectively improving the impedance matching of the antenna in the low-profile case. Furthermore, the antenna can be seamlessly integrated into the interior of a wireless communication device with a high-density layout while maintaining excellent signal transmission quality. While ensuring the antenna performance, it meets the stringent requirements of modern communication technology for antenna miniaturization, integration, and high performance. Description of the Drawings

[0022] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on the structures shown in these drawings.

[0023] Figure 1 Schematic diagram of the structure of an embodiment of the antenna provided by the present invention;

[0024] Figure 2 Schematic diagram of the loop antenna assembly related to the embodiment of the present invention;

[0025] Figure 3 Schematic diagram of the concave folded dipole related to the embodiment of the present invention;

[0026] Figure 4 Schematic diagram of the impedance bandwidth curve related to the embodiment of the present invention;

[0027] Figure 5 Schematic diagram of the antenna radiation efficiency related to the embodiment of the present invention;

[0028] Figure 6 Schematic diagram of the distributed current of the folded dipole related to the embodiment of the present invention;

[0029] Figure 7 Schematic diagram of the distributed current of the rectangular loop antenna related to the embodiment of the present invention;

[0030] Figure 8 Schematic diagram of the distributed current of the parasitic loop antenna related to the embodiment of the present invention;

[0031] Figure 9 Schematic diagram of the current distribution of the concave folded dipole and the rectangular loop antenna under null1 related to the embodiment of the present invention;

[0032] Figure 10 Schematic diagram of the current distribution of the rectangular loop antenna and the parasitic loop antenna under null2 related to the embodiment of the present invention;

[0033] Figure 11 Schematic diagram of the antenna gain-frequency curve related to the embodiment of the present invention;

[0034] Figure 12 Antenna horizontal plane pattern related to the embodiment of the present invention.

[0035] Explanation of the reference numerals in the drawings:

[0036] 10. Dielectric plate; 20. Floor; 30. Concave folded dipole; 40. Loop antenna assembly; 401. Rectangular loop antenna; 402. Parasitic loop antenna; K1. First slot; K2. Second slot; K3. Third slot; 301. Left arm dipole; 302. Right arm dipole; 303. Horizontal dipole.

[0037] The realization, functional features and advantages of the present utility model will be further described with reference to the embodiments and the accompanying drawings. Specific embodiments

[0038] The following will clearly and completely describe the technical solutions in the embodiments of the present utility model with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0039] It should be noted that if there are directional indications (such as up, down, left, right, front, back...) in the embodiments of the present utility model, the directional indications are only used to explain the relative positional relationship and movement conditions between components in a specific posture. If the specific posture changes, the directional indications will also change accordingly.

[0040] In addition, if there are descriptions such as "first", "second", etc. in the embodiments of the present utility model, the descriptions of "first", "second", etc. are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one such feature. In addition, if "and / or" or "and / or" appears throughout the text, its meaning includes three parallel solutions. Taking "A and / or B" as an example, it includes solution A, solution B, or a solution that satisfies both A and B at the same time. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of those of ordinary skill in the art to implement. When the combination of technical solutions results in contradictions or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the protection scope required by the present utility model.

[0041] In existing wireless communication devices, the three-dimensional space for structural stacking is very narrow, and there is often a lot of metal around the antenna, resulting in very low degrees of freedom in antenna design. First, an overly low profile will cause a sharp deterioration in antenna performance. In terms of selection, a patch antenna should be selected as much as possible. However, the lateral dimensions in the three-dimensional space are too small, and the lateral dimensions of the patch antenna are restricted. If the aspect ratio L (Length) / W (Width) of the patch antenna is too small, the antenna matching will be very poor.

[0042] In traditional antenna designs, most of the methods to achieve a low profile involve changing the reflection phase of electromagnetic waves after they are incident on the ground plane, loading a complex periodic HIS (High Impedance Surface) structure on the ground plane, or placing a magnetic conductor on the ground plane directly below the antenna. However, the periodic HIS structure and the magnetic conductor are large in size and will interfere with the circuit components on the PCB board, while increasing the material cost. In addition, once other electronic components are distributed around the resonator, it will definitely affect the electromagnetic coupling with the radiator, resulting in performance degradation.

[0043] In summary, in order to solve the above technical defects to improve the antenna performance and meet the requirements of modern compact wireless communication devices, the present utility model provides a small-sized low-profile folded dipole with a filtering response disposed in a wireless communication device.

[0044] Specifically, the present utility model proposes an antenna, an antenna device, and a wireless communication device.

[0045] In an embodiment of the present utility model, please refer to Figure 1 , Figure 1 which is a schematic structural diagram of an embodiment of the antenna provided by the present utility model. Figure 1 The rectangular frame indicated by the dashed line in is a loop antenna assembly 40 disposed on the lower surface of the dielectric plate 10. The antenna includes a dielectric plate 10, a ground plane 20, a concave folded dipole 30, and a loop antenna assembly 40.

[0046] The concave folded dipole 30 is printed on the upper surface of the dielectric plate 10, the loop antenna assembly 40 is disposed on the lower surface of the dielectric plate 10, the upper surface of the dielectric plate 10 is disposed on one side away from the ground plane 20, and the lower surface of the dielectric plate 10 is disposed on one side close to the ground plane 20.

[0047] In this embodiment, the present application enables the concave folded dipole 30 printed on the upper surface of the dielectric plate 10 to work in cooperation with the loop antenna assembly 40 disposed on the lower surface of the dielectric plate 10, not only achieving the miniaturization of the antenna, with an overall size that can reach 0.28λ * 0.136λ * 0.125λ, but also achieving excellent antenna performance while maintaining a very small physical size, demonstrating high miniaturization and integration characteristics. In particular, in order to compensate for the large capacitive reactance component introduced by the ground plane 20 in the low-profile antenna, the present application provides a loop antenna assembly 40 on the lower surface of the dielectric plate 10 close to the ground plane 20, so that the inductance of the loop antenna assembly 40 can cancel the capacitance of the ground plane 20, significantly improving the impedance matching problem of the antenna in the low-profile case, thereby achieving excellent antenna performance while maintaining a very small physical space, meeting the strict requirements of modern wireless communication devices for antenna miniaturization, integration, and high performance.

[0048] It should be noted that the dielectric plate 10 can be understood as an insulating plate with a thickness of 0.8 mm. Exemplarily, the dielectric plate 10 is an FR4 dielectric plate 10 with a thickness of 0.8 mm, and the distance between the dielectric plate 10 and the floor 20 is 13 mm.

[0049] λ represents the wavelength. Specifically, the λ corresponds to the free space wavelength of 2.45 GHz.

[0050] Further, in some feasible embodiments, please refer to Figure 2 , Figure 2 which is a schematic diagram of the loop antenna assembly 40 according to the embodiment of the present invention. The loop antenna assembly 40 at least includes a rectangular loop antenna 401 and a parasitic loop antenna 402, and the parasitic loop antenna 402 is nested in the rectangular loop antenna 401.

[0051] Further, in some other feasible embodiments, please refer to Figure 2 , the loop antenna assembly 40 further includes an antenna input port; the parasitic loop antenna 402 is in a concave loop shape, and the antenna input port is arranged on the concave surface side of the rectangular loop antenna 401 away from the parasitic loop antenna 402; the position coordinate point of the antenna input port arranged on the rectangular loop antenna 401 is set on the mirror symmetry line of the concave surface.

[0052] Further, in some feasible embodiments, please refer to Figure 2 , the mirror symmetry line of the concave surface coincides with the mirror symmetry line of the concave folded dipole 30.

[0053] In this embodiment, please refer to Figure 2 , the parasitic loop antenna 402 is nested in the rectangular loop antenna 401, and Figure 2 the part enclosed by the shown elliptical dotted line is a part of the parasitic loop antenna 402 folded inward (i.e., the bent part), which is used to adjust the coupling between the rectangular loop antenna 401 and the parasitic loop antenna 402, so as to achieve the purpose of optimizing the antenna impedance bandwidth.

[0054] It should be noted that the rectangular loop antenna 401 is coupled with the parasitic loop antenna 402, and the concave surface (i.e., the bent part) of the parasitic loop antenna 402 increases the interval between it and the rectangular loop antenna 401. In addition, the perimeter of the rectangular loop antenna 401 satisfies one wavelength λ, and the length and width of the rectangular loop antenna 401 can be customarily adjusted according to application requirements. Exemplarily, adjusting the length and width of the rectangular loop antenna 401 can also adjust the distance from the parasitic loop antenna 402, so as to adjust the coupling between the rectangular loop antenna 401 and the parasitic loop antenna 402.

[0055] Further, in some other feasible embodiments, please refer toFigure 3 , Figure 3 This is a schematic diagram of the concave folded dipole 30 involved in the embodiment of the present invention. The concave folded dipole 30 at least includes a left arm dipole 301, a right arm dipole 302, and a horizontal dipole 303; the left arm dipole 301 and the right arm dipole 302 are mirror-symmetrical, the left arm dipole 301 is vertically disposed at the first end of the horizontal dipole 303, and the right arm dipole 302 is vertically disposed at the second end of the horizontal dipole 303; the left arm dipole 301 is electrically connected to the first end of the horizontal dipole 303, and the second end of the horizontal dipole 303 is electrically connected to the right arm dipole 302.

[0056] In this embodiment, referring to Figure 3 , Figure 3 the convex side on the left of the concave folded dipole 30 shown is the left arm dipole 301, Figure 3 the convex side on the right of the concave folded dipole 30 shown is the right arm dipole 302, Figure 3 the inwardly bent side of the concave folded dipole 30 shown is the horizontal dipole 303. Exemplarily, a parasitic concave folded dipole 30 is printed on the upper surface of the dielectric plate 10. The concave surface (i.e., the inwardly bent part) of the concave folded dipole 30 is for reducing the area occupied by the antenna transversely. At the same time, by setting the concave folded dipole 30 to have a stepped width, the input impedance of the antenna can be effectively adjusted.

[0057] Further, in some feasible embodiments, the left arm dipole 301 is provided with a hollow first slot K1, the right arm dipole 302 is provided with a second slot K2 that is mirror-symmetrical to the first slot K1, the horizontal dipole 303 is provided with a hollow third slot K3, and the first slot K1 is connected to the second slot K2 through the third slot K3.

[0058] In this embodiment, referring to Figure 3 , the first slot K1, the second slot K2, and the third slot K3 provided in this application can effectively adjust the coupling between the two arms (i.e., the left arm dipole 301 and the right arm dipole 302) of the concave folded dipole 30 and optimize the matching.

[0059] It should be noted that the feeding method of the concave folded dipole 30 is to couple energy to the concave folded dipole 30 through the rectangular loop antenna 401.

[0060] Further, in some other feasible embodiments, the slot width of the first slot K1 is the same as the slot width of the second slot K2, and the width of the third slot K3 is less than the slot width of the first slot K1.

[0061] In this embodiment, the slot width of the first slot K1 needs to be equal to that of the second slot K2 and mirror-symmetrical. Exemplarily, if the structure of the concave folded dipole 30 set in this application is seriously asymmetrical, it will deteriorate the matching of the antenna, the radiation pattern, and the cross-polarization and other performances.

[0062] It should be noted that the slot width of the first slot K1: the slot width of the second slot K2: the slot width of the third slot K3 = 5:5:1. The above is only one implementation manner of this application, and this application does not make any restrictions here.

[0063] In addition, in another embodiment, please refer to Figure 4 , Figure 4 which is a schematic diagram of the impedance bandwidth curve related to the embodiment of the present utility model. Figure 4 The S-parameters shown refer to the impedance bandwidth curve of the antenna, that is, Figure 4 the curve shown is the impedance bandwidth curve of the antenna set in this application. It can be seen from Figure 4 that the antenna set in this application realizes three resonance points. These three resonance points are respectively denoted as F1, F2, and F3 from low to high in frequency. Among them, F1 is located at 2.33 GHz, F2 is located at 2.45 GHz, and F3 is located at 2.64 GHz, and the relative bandwidth is 14.5%.

[0064] Exemplarily, the focused frequency in a wireless communication device (such as a Wi-Fi product) is only 2.4 GHz - 2.5 GHz. The relatively wide impedance bandwidth can bring a certain margin, which is beneficial to integration and debugging in the product.

[0065] In addition, please refer to Figure 5 , Figure 5 which is a schematic diagram of the radiation efficiency of the antenna related to the embodiment of the present utility model. Figure 5 The "Radiation Efficency" shown refers to the radiation efficiency of the antenna. It can be seen from Figure 5 that the antenna has two null points. The two null points are respectively denoted as null1 and null2 from low to high in frequency. null1 is located at 2.2 GHz, and null2 is located at 2.8 GHz. The introduced null points can effectively shield out-of-band interference.

[0066] In addition, in yet another embodiment, please refer to Figure 6 , Figure 6 which is a schematic diagram of the distributed current of the folded dipole related to the embodiment of the present utility model. Specifically, Figure 4 the frequency related to the resonance point F1 shown is generated by the concave folded dipole 30. Figure 6 It shows the common-mode current distribution of the concave folded dipole 30 at the resonance point F1.

[0067] Please refer to Figure 7 , Figure 7 , which is a schematic diagram of the distributed current of the rectangular loop antenna 401 according to an embodiment of the present invention. Specifically, Figure 4 the frequency related to the resonance point F2 shown is generated by the rectangular loop antenna 401, Figure 7 and it schematically shows the common-mode current distribution of the rectangular loop antenna 401 at the resonance point F2.

[0068] Please refer to Figure 8 , Figure 8 , which is a schematic diagram of the distributed current of the parasitic loop antenna 402 according to an embodiment of the present invention. Specifically, Figure 4 the frequency related to the resonance point F3 shown is generated by the parasitic loop antenna 402, Figure 8 and it schematically shows the common-mode current distribution of the parasitic loop antenna 402 at the resonance point F3.

[0069] Please refer to Figure 9 , Figure 9 , which is a schematic diagram of the current distribution between the concave combined oscillator 30 and the rectangular loop antenna 401 under null1 according to an embodiment of the present invention. Among them, Figure 9 (a) shows the current distribution of the concave combined oscillator 30, Figure 9 (b) shows the current distribution of the rectangular loop antenna 401. Exemplarily, Figure 6 the zero-point frequency null1 shown is generated by the combined action of the rectangular loop antenna 401 and the concave combined oscillator 30. That is to say, Figure 9 the current distributions between the rectangular loop antenna 401 and the concave combined oscillator 30 shown are opposite in different phases, which will cause the radiation to be canceled, thereby generating a radiation zero point.

[0070] Please refer to Figure 10 , Figure 10 , which is a schematic diagram of the current distribution between the rectangular loop antenna 401 and the parasitic loop antenna 402 under null2 according to an embodiment of the present invention. Figure 6 The zero-point frequency null2 shown is generated by the parasitic loop antenna 402, Figure 10 and the current distributions between the rectangular loop antenna 401 and the parasitic loop antenna 402 shown are opposite in different phases, which will cause the radiation to be canceled, thereby generating a radiation zero point.

[0071] Please refer to Figure 11 , Figure 11 , which is a graph of antenna gain - frequency according to an embodiment of the present invention. From Figure 11As can be seen from the gain-frequency curve of the antenna shown, the antenna set in this application has two zeros located at null1 and null2, forming a band-pass filter response. The antenna gain is greater than 5 dBi at 2.4 - 2.5 GHz of interest, and this gain is sufficient for most IoT products. In addition, please refer to Figure 12 , Figure 12 which is the horizontal plane pattern of the antenna according to the embodiment of the present utility model, Figure 12 and the shown horizontal plane pattern of the antenna is the horizontal plane pattern of the antenna at 2.4 GHz and 2.5 GHz.

[0072] In summary, this application uses a rectangular loop antenna 401 to excite a parasitic folded dipole (i.e., a concave folded dipole), and uses the inductive component of the rectangular loop antenna 401 to cancel the capacitive component of the ground plane 20, generating two resonance points to expand the antenna bandwidth. In addition, this application also excites a parasitic nested loop antenna (i.e., a parasitic loop antenna 402) through the loop antenna, further introducing a third resonance point F3 to expand the antenna bandwidth, and uses the rectangular loop antenna 401 and the parasitic folded dipole to generate a first radiation zero, and uses the rectangular loop antenna 401 and the parasitic nested loop antenna to generate a second radiation zero.

[0073] Furthermore, in some feasible embodiments, the antenna further includes four support columns, and the dielectric plate 10 is in the shape of a rectangular plate; the four support columns are correspondingly arranged at the four corners of the dielectric plate 10 for installation and fixation with the ground plane 20.

[0074] In summary, the present utility model provides an antenna with a miniaturized and low-profile design. This antenna cleverly integrates the dielectric plate 10, the ground plane 20, the low-profile concave folded dipole 30, and the loop antenna assembly 40. Through the collaborative work of the concave folded dipole 30 printed on the upper surface of the dielectric plate 10 and the loop antenna assembly 40 arranged on the lower surface, excellent antenna performance is maintained under extremely small physical dimensions. In particular, by introducing the loop antenna assembly 40, the large capacitive reactance component introduced by the ground plane 20 is effectively compensated, so that the inductance of the loop antenna assembly 40 can cancel the capacitance of the ground plane 20, thereby effectively improving the impedance matching of the antenna in the low-profile case, and further enabling the antenna to be seamlessly integrated inside a wireless communication device with a high-density layout, while maintaining excellent signal transmission quality. While ensuring the antenna performance, the stringent requirements of modern communication technology for antenna miniaturization, integration, and high performance are met.

[0075] The present utility model also proposes an antenna device, which at least includes the above antenna. The specific structure of this antenna refers to the above embodiments. Since the antenna device adopts all the technical solutions of the above all embodiments, it at least has all the beneficial effects brought by the technical solutions of the above embodiments, and will not be elaborated one by one here.

[0076] The present utility model further provides a wireless communication device, which at least includes the above-mentioned antenna device. For the specific structure of the antenna device, reference may be made to the above-mentioned embodiments. Since the wireless communication device adopts all the technical solutions of the above-mentioned embodiments, it has at least all the beneficial effects brought by the technical solutions of the above-mentioned embodiments, which will not be elaborated one by one herein.

[0077] The above is only an exemplary embodiment of the present utility model, and does not limit the patent scope of the present utility model. Any equivalent structural transformation made under the technical concept of the present utility model by using the content of the specification and drawings of the present utility model, or any direct / indirect application in other related wireless communication technical fields is included in the patent protection scope of the present utility model.

Claims

1. An antenna, characterized in that: The antenna comprises a dielectric plate, a floor, a concave folded dipole and a loop antenna assembly; The concave folded oscillator is printed on the upper surface of the dielectric plate, the ring antenna assembly is arranged on the lower surface of the dielectric plate, the upper surface of the dielectric plate is arranged on the side away from the floor, and the lower surface of the dielectric plate is arranged on the side close to the floor.

2. The antenna according to claim 1, characterized in that The loop antenna assembly at least includes a rectangular loop antenna and a parasitic loop antenna, and the parasitic loop antenna is nested in the rectangular loop antenna.

3. The antenna according to claim 2, characterized in that The loop antenna assembly also includes an antenna input port; The parasitic loop antenna is in a concave ring shape, and the antenna input port is arranged on a concave side of the rectangular loop antenna away from the parasitic loop antenna; The position coordinate point where the antenna input port is arranged on the rectangular ring antenna is set on the mirror symmetry line of the concave surface.

4. The antenna according to claim 3, characterized in that The mirror symmetry line of the concave surface coincides with the mirror symmetry line of the concave folded vibrator.

5. The antenna according to claim 1, characterized in that The concave folded vibrator at least includes a left arm vibrator, a right arm vibrator and a horizontal vibrator; The left arm vibrator is mirror-symmetrical to the right arm vibrator, the left arm vibrator is vertically arranged at the first end of the horizontal vibrator, and the right arm vibrator is vertically arranged at the second end of the horizontal vibrator; The left arm vibrator is electrically connected to a first end of the horizontal vibrator, and a second end of the horizontal vibrator is electrically connected to the right arm vibrator.

6. The antenna according to claim 5, characterized in that The left arm vibrator is provided with a first hollow slit, the right arm vibrator is provided with a second slit that is mirror-symmetrical to the first slit, and the horizontal vibrator is provided with a third hollow slit, and the first slit is connected to the second slit through the third slit.

7. The antenna according to claim 6, characterized in that The slit width of the first slit is the same as the slit width of the second slit, and the width of the third slit is smaller than the slit width of the first slit.

8. The antenna according to claim 1, wherein: The antenna further comprises four supporting columns, and the dielectric plate is in the shape of a rectangular plate; The four support columns are correspondingly arranged at the four corners of the medium plate for being installed and fixed to the floor.

9. An antenna device, characterized in that: The antenna device comprises at least the antenna according to any one of claims 1 to 7.

10. A wireless communication device, characterized in that: The antenna device at least includes the antenna device according to claim 9.

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