Antenna structure, wireless communication device and energy storage equipment

Abstract

The utility model provides an antenna structure, a wireless communication device and energy storage equipment, the antenna structure comprises a dielectric substrate and an onboard antenna, the onboard antenna comprises a grounding part and a radiation part which are connected, the grounding part is connected to the dielectric substrate and is used for providing grounding for the onboard antenna, the radiation part protrudes out of a first side edge of the dielectric substrate, and the radiation part is used for providing radiation for the onboard antenna. The antenna is used for radiating wireless signals; the parasitic antenna is connected to the dielectric substrate, the parasitic antenna and the onboard antenna are arranged in a spaced mode, when current is fed into the onboard antenna to radiate wireless signals, the parasitic antenna is used for feeding current through the dielectric substrate to radiate the wireless signals at the same time, the radiation efficiency of the antenna structure is effectively improved, and the parasitic antenna is simple in structure and small in occupied space; and the application cost is low.

Description

Technical Field

[0001] The present application relates to the field of wireless communication technology, and in particular to an antenna structure and a wireless communication device and energy storage device having the antenna structure. Background Art

[0002] Printed circular board (PCB) onboard antenna is a very common antenna form. The onboard antenna can be directly designed on the PCB of the communication module and then soldered to the larger PCB board used by SMT, or directly designed to the larger PCB board. However, the placement of the antenna is determined by many factors, such as the layout of the PCB board components, the layout of the product, the structural clearance position, possible interference sources, etc., and in order to save costs, the size of the PCB board is relatively limited. These factors are usually not conducive to improving the antenna radiation efficiency. If a communication module with an antenna is used, however, the communication module is a general material and its antenna cannot be adjusted. If the problem of low antenna efficiency is encountered, its improvement measures are limited. Therefore, there is still room for improvement in the design of the antenna. Utility Model Content

[0003] In view of the above, it is necessary to provide an antenna structure and a wireless communication device and an energy storage device having the antenna structure.

[0004] In a first aspect, an embodiment of the present application provides an antenna structure, comprising: a dielectric substrate; an on-board antenna, the on-board antenna comprising a grounding portion and a radiating portion connected to each other, the grounding portion being connected to the dielectric substrate and used to provide grounding for the on-board antenna, the radiating portion protruding from a first side edge of the dielectric substrate and used to radiate wireless signals; a parasitic antenna, the parasitic antenna being connected to the dielectric substrate and spaced apart from the on-board antenna, and being used to feed current through the dielectric substrate to simultaneously radiate wireless signals when the on-board antenna is fed with current to radiate wireless signals.

[0005] The antenna structure of this solution connects and spaced apart an onboard antenna and a parasitic antenna through a dielectric substrate. While the onboard antenna is fed with current to radiate wireless signals, the current is conducted to the parasitic antenna through the dielectric substrate, so that the parasitic antenna simultaneously radiates wireless signals, thereby effectively improving the radiation efficiency of the antenna structure. In addition, the parasitic antenna has a simple structure, occupies a small space, and has a low application cost.

[0006] In some embodiments, the length of the parasitic antenna is 1 / 4 of the wavelength of the operating frequency of the onboard antenna.

[0007] In some embodiments, the onboard antenna, the dielectric substrate, and the parasitic antenna conduct current to form a current loop to jointly radiate wireless signals in a preset frequency band.

[0008] In some embodiments, the parasitic antenna includes a ground terminal connected to the dielectric substrate and disposed adjacent to the radiating portion.

[0009] In some embodiments, the parasitic antenna includes a first arm, a second arm, and a third arm connected in sequence, one end of the first arm is the ground end, the first arm is connected to the first side through the ground end, and the first arm is spaced apart from the radiating portion, the second arm is vertically connected between the first arm and the third arm, the first arm and the third arm extend in the same direction, and the third arm is spaced apart from the second side of the dielectric substrate.

[0010] In some embodiments, the dielectric substrate has a notch, the onboard antenna is disposed in the notch, and the first arm and the ground end are disposed in the notch.

[0011] In some embodiments, the parasitic antenna includes a ground terminal, the ground portion and the ground terminal are respectively connected to a first side edge and a second side edge of the dielectric substrate, and the first side edge and the second side edge are two adjacent side edges of the dielectric substrate.

[0012] In some embodiments, the parasitic antenna includes a first arm and a second arm connected in sequence, one end of the first arm is the ground end, and the second arm is spaced apart from the second side of the dielectric substrate and the radiating portion.

[0013] The dielectric substrate is provided with a notch, the onboard antenna is arranged in the notch, and the first arm and the ground end are connected to the second side of the dielectric substrate away from the notch.

[0014] The onboard antenna further includes a feeding portion, which is connected to the radiating portion and spaced apart from the grounding portion. The feeding portion is used to feed current to the radiating portion.

[0015] The antenna structure further includes a communication unit, which is arranged on the dielectric substrate, and the onboard antenna is connected to the communication unit.

[0016] In a second aspect, an embodiment of the present application provides a wireless communication device, comprising the antenna structure of the first aspect.

[0017] In a third aspect, an embodiment of the present application provides an energy storage device, comprising the antenna structure of the first aspect.

[0018] In addition, the technical effects brought about by the second aspect and any possible design method thereof can be found in the description related to the methods of each design in the above method part, which will not be repeated here. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 A schematic structural diagram of an antenna structure provided in the first embodiment of the present application.

[0020] Figure 2 A schematic structural diagram of an antenna structure provided in the second embodiment of the present application.

[0021] Figure 3 A schematic diagram of the three-dimensional structure of an energy storage device using an antenna structure provided in an embodiment of the present application.

[0022] Figure 4 A schematic diagram of the three-dimensional decomposition structure of an energy storage device using an antenna structure provided in an embodiment of the present application.

[0023] Figure 5 A schematic structural diagram of an antenna structure provided in the third embodiment of the present application.

[0024] Figure 6 A schematic diagram of current distribution of the antenna structure provided in the first embodiment of the present application.

[0025] Figure 7 A schematic diagram of current distribution of the antenna structure provided in the second embodiment of the present application.

[0026] Figure 8 A schematic diagram of current distribution of the antenna structure provided in the third embodiment of the present application.

[0027] Figure 9 A schematic diagram of the S11 parameters of the antenna structure provided in an embodiment of the present application.

[0028] Figure 10 A schematic diagram of the S11 parameters of an antenna structure provided in another embodiment of the present application.

[0029] Description of main component symbols

[0030] 100, 500-antenna structure 10, 510-dielectric substrate 11-first side

[0031] 12-Second side 15, 512-Missing corner 20, 520-Onboard antenna

[0032] 21- grounding part 22- radiation part 23- feeding part

[0033] 30 - parasitic antenna 31, 35 - first arm 32, 36 - second arm

[0034] 33 - third arm 34, 37 - ground terminal 40 - communication unit

[0035] 200-Energy storage device 210-Shell 212-Accommodation space

[0036] 220-Storage unit 230-Interface

[0037] The following specific implementation methods will further illustrate the present application in conjunction with the above-mentioned drawings. DETAILED DESCRIPTION

[0038] In the following, the terms "first" and "second" are used for descriptive purposes only and are not to be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, the features defined as "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the embodiments of the present application, words such as "exemplary", "or", and "for example" are used to indicate examples, illustrations, or descriptions. Any embodiment or design described as "exemplary" or "for example" in the embodiments of the present application should not be interpreted as being more preferred or more advantageous than other embodiments or design schemes. Specifically, the use of words such as "exemplary", "or", and "for example" is intended to present related concepts in a concrete way.

[0039] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which this application belongs. The terms used in the specification of this application are for the purpose of describing specific embodiments only and are not intended to limit this application. It should be understood that, unless otherwise specified in this application, " / " means or. For example, A / B can mean A or B. "And / or" in this application is merely a way to describe the association relationship of associated objects, indicating that three relationships can exist. For example, A and / or B can mean: A exists alone, A and B exist at the same time, and B exists alone. "At least one" means one or more. "Multiple" means two or more than two. For example, at least one of a, b or c can mean: a, b, c, a and b, a and c, b and c, a, b and c.

[0040] Printed circular board (PCB) onboard antenna is a very common antenna form. The onboard antenna can be directly designed on the PCB of the communication module and then soldered to the larger PCB board used by SMT, or directly designed to the larger PCB board. However, the placement of the antenna is determined by many factors, such as the layout of the PCB board components, the layout of the product, the structural clearance position, possible interference sources, etc., and in order to save costs, the size of the PCB board is relatively limited. These factors are usually not conducive to improving the antenna radiation efficiency. If a communication module with an antenna is used, however, the communication module is a general material and its antenna cannot be adjusted. If the problem of low antenna efficiency is encountered, its improvement measures are limited. Therefore, there is still room for improvement in the design of the antenna.

[0041] Figure 1 A schematic structural diagram of an antenna structure 500 according to a first embodiment of the present application is provided. Antenna structure 500 includes a dielectric substrate 510 and an onboard antenna 520. Onboard antenna 520 is disposed in a notched corner 512 of dielectric substrate 10 and is connected to a side edge of notched corner 512 of dielectric substrate 10. Onboard antenna 520 extends in a meandering pattern within notched corner 512. Onboard antenna 520 can conduct current after being fed and transfer the current to dielectric substrate 510. However, the current loop on dielectric substrate 510 is short and the current intensity is weak. Therefore, the radiation of the current on dielectric substrate 510 accounts for a portion of the radiation energy of the antenna structure, resulting in low radiation efficiency for antenna structure 500.

[0042] Therefore, the present application provides an antenna structure according to a second embodiment, in which an onboard antenna and a parasitic antenna are connected and spaced apart via a dielectric substrate. While the onboard antenna is fed with current to radiate wireless signals, the dielectric substrate conducts current to the parasitic antenna, causing the parasitic antenna to simultaneously radiate wireless signals. This allows the onboard antenna, dielectric substrate, and parasitic antenna to form a longer current loop, effectively improving the radiation efficiency of the antenna structure. Furthermore, the parasitic antenna has a simple structure and occupies a small space, making it suitable for use in the compact interior space of wireless communication devices or energy storage equipment, and its application cost is low.

[0043] Specifically, Figure 2 A schematic diagram of an antenna structure 100 according to a second embodiment of the present application is provided. Antenna structure 100 can be applied to a wireless communication device for transmitting and receiving wireless communication signals. In some embodiments, the wireless communication device may include, but is not limited to, a smart wearable device, a mobile phone, a tablet computer, a laptop computer, an audio player, a router, a Wi-Fi device, a gaming device, an IoT device, a television, a refrigerator, a washing machine, and the like.

[0044] In some embodiments, the antenna structure 100 can also be used in energy storage devices to implement wireless communication capabilities. Energy storage devices have both storage and discharge capabilities and are used for home backup power, production unit backup power, outdoor work, and outdoor entertainment. Specifically, energy storage devices can include small portable power banks, household energy storage power supplies, industrial and commercial energy storage power supplies, or containerized energy storage power supplies.

[0045] For example, please refer to Figure 3 and Figure 4, respectively, are a schematic diagram of the three-dimensional structure and a schematic diagram of the exploded structure of the energy storage device provided in the embodiment of the present application. The antenna structure 100 can be applied to the energy storage device 200, which has mobility, electrical energy storage and charging and discharging functions. The energy storage device 200 can be connected to a charging device to receive the power supply signal of the charging device for charging; the energy storage device 200 can be connected to a load to supply power to the load. It can be understood that when the energy storage device 200 is connected to a charging device, it can enter a charging mode, and when the energy storage device 200 is connected to a load, it can enter a discharging mode. When the energy storage device 200 is connected to a charging device and a load at the same time, if the power supply of the charging device is greater than the power required by the load, it can enter a bypass mode, that is, while the charging device energizes the load, it uses the remaining power to charge the energy storage device 200; if the power supply of the charging device is less than the power required by the load, the energy storage device 200 and the charging device jointly supply power to the load, and the energy storage device 200 operates in a discharging mode.

[0046] The energy storage device 200 may further include a housing 210 and a storage unit 220. A receiving space 212 is provided in the housing 210, and the storage unit 220 and the antenna structure 100 are received in the receiving space 212. The storage unit 220 is used to store electrical energy and to charge and discharge the electrical energy to provide electrical energy to other devices. The antenna structure 100 may be used to wirelessly communicate with other devices to enable the energy storage device 200 to wirelessly communicate with other devices and exchange information. In some embodiments, the housing 210 has waterproof and dustproof functions and structural strength to provide protection for the storage unit 220 and the antenna structure 100 received therein, so that the energy storage device 200 can be applied to more application scenarios, such as outdoor application scenarios.

[0047] In some embodiments, the energy storage device 200 may also be provided with multiple input and output interfaces 230 for connecting to a charging device to charge the energy storage device 200, or for connecting to a load to discharge the energy storage device 200. It is understood that the energy storage device 200 may also include other electronic components, which are not described in detail herein.

[0048] Please also refer to Figure 2 The antenna structure 100 of the second embodiment of the present application may include a dielectric substrate 10 , an onboard antenna 20 and a parasitic antenna 30 .

[0049] The dielectric substrate 10 is a generally rectangular plate-shaped structure and is used to support the onboard antenna 20, the parasitic antenna 30, and related electronic components. In some embodiments, the dielectric substrate 10 has a predetermined dielectric constant and can be used to conduct current.

[0050] The dielectric substrate 10 includes a first side 11 and a second side 12 adjacent to each other. In some embodiments, the first side 11 and the second side 12 are connected substantially perpendicularly. In some embodiments, the dielectric substrate 10 has a notch 15 at one of the corners of the rectangular plate. Specifically, the notch 15 is formed by recessing a portion of the first side 11 of the dielectric substrate 10 adjacent to the second side inwardly along the second side 12 by a predetermined distance. The notch 15 is substantially rectangular and can be configured as a clearance area for the antenna structure 100. In some embodiments, the dielectric substrate 10 can be, but is not limited to, a printed circuit board (PCB). It is understood that the dielectric substrate 10 can be substantially rectangular, polygonal, elliptical, irregularly polygonal, etc., and can also include other sides or edges besides the first side 11 and the second side 12, which are not specifically listed in detail herein.

[0051] The onboard antenna 20 is disposed in the notch 15 and connected to the first side 11 . The onboard antenna 20 includes a ground portion 21 , a radiating portion 22 , and a feeding portion 23 .

[0052] The grounding portion 21 is connected to the first side 11 of the dielectric substrate 10 and is used to provide grounding for the onboard antenna 20. In some embodiments, the grounding portion 21 is a generally straight segment, with one end connected approximately perpendicularly to the first side 11 and the other end extending away from the first side 11. The radiating portion 22 is connected to the grounding portion 21 and protrudes from the first side 11 of the dielectric substrate 10. The radiating portion 22 is used to conduct current and radiate wireless signals. In some embodiments, the radiating portion 22 extends in a generally serpentine shape, having multiple continuously connected bends. One end of the radiating portion 22 is connected to the end of the grounding portion 21 away from the first side 11. The radiating portion 22 extends in a zigzag manner from the grounding portion 21 toward the second side 12, resulting in a long and curved radiation path for the radiating portion 22. In some embodiments, the end of the radiating portion 22 away from the grounding portion 21 is open, and the open end is close to the second side 12. In some embodiments, the multiple continuously connected bends of the radiating portion 22 may be bent at approximately right angles. In other embodiments, the multiple continuously connected bends of the radiating portion 22 may also be circular bends, non-right-angle bends, or a combination of right-angle bends, non-right-angle bends, and circular bends, etc., and this application is not limited thereto. The feeding portion 23 is connected to the first side 11 of the dielectric substrate 10 and is used to feed current to the radiating portion 22. In some embodiments, the feeding portion 23 is a generally straight segment, with one end connected approximately perpendicularly to the first side 11 and the other end extending away from the first side 11 and connected to the radiating portion 22. The feeding portion 23 is generally parallel to and spaced apart from the ground portion 21.

[0053] The parasitic antenna 30 is connected to the dielectric substrate 10 and spaced apart from the onboard antenna 20. When the onboard antenna 20 is fed with current to radiate wireless signals, the parasitic antenna 30 can be used to feed current from the onboard antenna 20 through the dielectric substrate 10, generating electromagnetic resonance and simultaneously radiating wireless signals. This allows the parasitic antenna 30 to extend the radiated current of the onboard antenna 20. The onboard antenna 20, the dielectric substrate 10, and the parasitic antenna 30 conduct current to form a current loop. This loop antenna can be formed, allowing the energy of the onboard antenna 20 to be more effectively radiated into the surrounding space, thereby improving the overall radiation efficiency of the antenna structure 100. In some embodiments, the length of the parasitic antenna 30 can be 1 / 4 of the wavelength of the operating frequency band of the onboard antenna 20, i.e., λ / 4.

[0054] In a second embodiment of the present application, a parasitic antenna 30 includes a first arm 31, a second arm 32, and a third arm 33, which are connected in sequence. One end of the first arm 31 is a ground terminal 34, which is connected to the first side 11 of the dielectric substrate 10 via the ground terminal 34. The first arm 31 is spaced apart from the open end of the radiating portion 22. In some embodiments, the first arm 31 is disposed within the notch 15 and is substantially perpendicular to the first side 11. The second arm 32 is perpendicularly connected between the first arm 31 and the third arm 33. The second arm 32 extends from the first arm 31 toward the second side 12, crosses the second side 12, and then continues to extend away from the second side 12, such that the third arm 33 is spaced apart from the second side 12. The first arm 31 and the third arm 33 extend in the same direction. The third arm 33 is longer than the first arm 31 and extends from the second arm 32 to a position spaced apart from the second side 12.

[0055] Please also refer to Figure 5 In the third embodiment of the present application, the parasitic antenna 30 includes a first arm 35 and a second arm 36 connected in sequence. One end of the first arm 35 is a ground terminal 37, which is connected to the second side 12 of the dielectric substrate 10 via the ground terminal 37. In some embodiments, the first arm 35 is connected to the end of the second side 12 away from the notch 15 via the ground terminal 37. One end of the first arm 35 is connected approximately perpendicularly to the second side 12 and extends away from the second side 12. One end of the second arm 36 is connected approximately perpendicularly to the end of the first arm 35 away from the second side 12 and extends parallel to the second side 12 toward the notch 15. The other end of the second arm 36 extends to a position spaced apart from the open end of the radiating portion 22. The second arm 36 is spaced apart from and parallel to the second side 12. It is understood that the parasitic antenna 30 may also have other structural shapes, such as a bent S-shape or an arc, as long as its length is 1 / 4 of the wavelength of the operating frequency band of the onboard antenna 20, i.e., λ / 4. This application is not limited thereto.

[0056] As can be seen from the parasitic antenna 30 shown in the second and third embodiments, the parasitic antenna 30 has a simple structure and occupies a small space, and can be applied to the compact internal space of a wireless communication device or an energy storage device, for example Figure 3 and Figure 4 In the housing space 212 of the energy storage device 200 shown, the parasitic antenna 30 occupies a relatively small area of the housing space 212, thus not affecting the arrangement of other electronic components within the housing space 212. Furthermore, due to the simple structure of the parasitic antenna 30, the parasitic antenna 30 is simply added near the onboard antenna 20 disposed adjacent to the dielectric substrate 10, without requiring any additional design changes to the onboard antenna 20 itself. This results in a relatively low cost for the parasitic antenna 30.

[0057] In some embodiments, the onboard antenna 20 may be, but is not limited to, an inverted-F antenna or a monopole sub-antenna, and the parasitic antenna 30 may be, but is not limited to, an L-shaped antenna.

[0058] In some embodiments, the antenna structure 100 further includes a communication unit 40. The communication unit 40 is disposed on the dielectric substrate 10, and the onboard antenna 20 is connected to the communication unit 40. The communication unit 40 can be used to provide wireless signals and transmit wireless signals to the onboard antenna 20, or the communication unit 40 can receive wireless signals through the onboard antenna 20.

[0059] Please also refer to Figure 6 , provides a current distribution schematic diagram of the antenna structure 500 of the first embodiment of the present application, that is, a current distribution schematic diagram when the antenna structure does not include the parasitic antenna 30. After the onboard antenna 520 is fed with current, it conducts the current and conducts the current to the dielectric substrate 510. However, the current loop on the dielectric substrate 510 is short and the current intensity is weak. The radiation of the current on the dielectric substrate 510 accounts for a part of the radiation energy of the antenna structure, and the radiation efficiency of the antenna structure is low.

[0060] Please also refer to Figure 7 and Figure 8 , respectively provide schematic current distribution diagrams when the antenna structure 100 includes the parasitic antenna 30 of the second embodiment or the parasitic antenna 30 of the third embodiment of the present application. After being fed with current, the onboard antenna 20 conducts the current and transmits the current to the parasitic antenna 30 through the dielectric substrate 10. The current intensity on the parasitic antenna 30 is relatively strong, and forms a loop with the current on the dielectric substrate 10 and the onboard antenna 20, extending the current on the dielectric substrate 10 and forming a parasitic antenna effect. As a result, the radiation of the parasitic antenna 30 is combined with the radiation of the onboard antenna 20, which is beneficial to improving the overall radiation efficiency of the antenna structure 100.

[0061] Please also refer to Figure 9 and Figure 10 , Figure 9A schematic diagram of the S11 parameters of the antenna structure of an embodiment of the present application when no parasitic antenna is included is provided. Figure 10 A schematic diagram of the S11 parameters of the antenna structure 100 according to an embodiment of the present application when the antenna structure 100 includes the parasitic antenna 30 is provided. The abscissa in the figure represents frequency (GHz) and the ordinate represents active S11 parameters (dB).

[0062] Depend on Figure 9 and Figure 10 It can be seen that in the 2.GHz to 2.5GHz frequency band, when the antenna structure does not include a parasitic antenna, the return loss is approximately in the range of -2.48dB to -3.2dB; when the antenna structure 100 includes the parasitic antenna 30, the return loss is approximately in the range of -10.4dB to -18.9dB. It can be seen that when the antenna structure 100 includes the parasitic antenna 30, the return loss of the antenna structure 100 is greatly improved.

[0063] Please refer to Table 1. The total radiated power (TRP) test comparison of the antenna structure 100 without the parasitic antenna and with the parasitic antenna 30 is as follows:

[0064]

[0065] Table 1: TRP test comparison

[0066] As can be seen from Table 1, when the antenna structure 100 includes the parasitic antenna 30, the transmission power of the antenna structure 100 is effectively improved by approximately 3dB. Therefore, the antenna structure 100 can effectively improve the radiation efficiency of the antenna and provide an effective method for debugging the antenna structure 100.

[0067] The antenna structure 100 of the present application is connected to and spaced apart from an onboard antenna 20 and a parasitic antenna 30 via a dielectric substrate 10. While the onboard antenna 20 is fed with current to radiate wireless signals, the current is conducted to the parasitic antenna 30 via the dielectric substrate 10, so that the parasitic antenna 30 simultaneously radiates wireless signals, thereby effectively improving the radiation efficiency of the antenna structure 100. Furthermore, the parasitic antenna 30 has a simple structure, occupies a small space, and has a low application cost.

[0068] It is obvious to those skilled in the art that the present application is not limited to the details of the above exemplary embodiments and that the present application can be implemented in other specific forms without departing from the spirit or essential features of the present application. Therefore, as long as they are within the scope of the essence of the present application, appropriate changes and modifications made to the above embodiments should fall within the scope of protection claimed in the present application.

Claims

1. An antenna structure, characterized in that: The antenna structure comprises: dielectric substrate; an onboard antenna, the onboard antenna comprising a grounding portion and a radiating portion connected to each other, the grounding portion being connected to the dielectric substrate and used to provide grounding for the onboard antenna, and the radiating portion protruding from a first side edge of the dielectric substrate and used to radiate wireless signals; A parasitic antenna is connected to the dielectric substrate and is spaced apart from the onboard antenna. When the onboard antenna is fed with current to radiate wireless signals, the parasitic antenna is used to feed current through the dielectric substrate to simultaneously radiate wireless signals.

2. The antenna structure according to claim 1, characterized in that The length of the parasitic antenna is 1 / 4 of the wavelength of the operating frequency of the onboard antenna.

3. The antenna structure according to claim 1, wherein: The onboard antenna, the dielectric substrate, and the parasitic antenna conduct current to form a current loop, so as to jointly radiate wireless signals of a preset frequency band.

4. The antenna structure according to claim 1, wherein: The parasitic antenna includes a grounding end connected to the dielectric substrate and arranged adjacent to the radiation portion.

5. The antenna structure according to claim 4, wherein: The parasitic antenna includes a first arm, a second arm, and a third arm connected in sequence. One end of the first arm is the ground end. The first arm is connected to the first side through the ground end, and the first arm is spaced apart from the radiating portion. The second arm is vertically connected between the first arm and the third arm. The first arm and the third arm extend in the same direction. The third arm is spaced apart from the second side of the dielectric substrate.

6. The antenna structure according to claim 5, characterized in that: The dielectric substrate is provided with a notch, the onboard antenna is arranged in the notch, and the first arm and the ground end are arranged in the notch.

7. The antenna structure according to any one of claims 1 to 6, characterized in that: The parasitic antenna includes a grounding end. The grounding portion and the grounding end are respectively connected to the first side edge and the second side edge of the dielectric substrate. The first side edge and the second side edge are two adjacent side edges of the dielectric substrate.

8. The antenna structure according to claim 7, characterized in that: The parasitic antenna includes a first arm and a second arm connected in sequence. One end of the first arm is the ground end. The second arm is spaced apart from the second side of the dielectric substrate and the radiating portion. The dielectric substrate has a notch. The onboard antenna is disposed in the notch. The first arm and the ground end are connected to the second side of the dielectric substrate away from the notch.

9. A wireless communication device, characterized in that: The wireless communication device comprises the antenna structure according to any one of claims 1 to 8.

10. An energy storage device, characterized in that: The energy storage device comprises the antenna structure according to any one of claims 1 to 8.

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