Antenna and unmanned aerial vehicle

Abstract

The embodiment of the utility model relates to the technical field of antennas, and discloses an antenna and an unmanned aerial vehicle, the antenna comprises a substrate, a spiral radiation arm, a first feed line, a radiation assembly, a second feed line and a combiner, the first surface of the substrate comprises an empty foil area and a grounding area, and at least part of the grounding area is covered with a first metal layer; one end of the spiral radiation arm is electrically connected with the first metal layer, the spiral radiation arm is used for radiating a first frequency band signal, a spiral space is formed in the spiral radiation arm, and at least part of the empty foil area is located in the spiral space; the first feeder line is electrically connected with the spiral radiation arm; the radiation assembly is arranged in the empty foil area, is located in the spiral space, and is used for radiating a second frequency band signal; one end of the second feeder line is electrically connected with the radiation assembly; the combiner is arranged on the first surface, and the first feeder line and the second feeder line are electrically connected with the combiner. According to the embodiment of the utility model, the utilization rate of the spiral space formed by the spiral radiation arms can be improved.

Description

Technical Field

[0001] This utility model relates to the field of antenna technology, and in particular to an antenna and a drone. Background Technology

[0002] In antennas, as the frequency of the radiated signal decreases, the length of the radiating arm used to radiate low-frequency signals increases. To reduce the area occupied by the low-frequency radiating arm, the spiral radiating arm antenna was developed. By designing the low-frequency radiating arm as a spiral, the space occupied by the antenna can be saved.

[0003] During the implementation of this utility model embodiment, the inventors discovered that the internal space of the spiral radiating arm in existing spiral antennas is not effectively utilized, resulting in wasted space. Utility Model Content

[0004] The main technical problem solved by this utility model embodiment is to provide an antenna and a drone that can improve the utilization rate of the helical space formed by the helical radiating arm.

[0005] To solve the above-mentioned technical problems, one technical solution adopted in this utility model embodiment is as follows: An antenna is provided, comprising a substrate, a helical radiating arm, a first feed line, a radiating component, a second feed line, and a combiner. The substrate has a first surface, which includes an empty foil area and a grounding area. At least a portion of the grounding area is covered by a first metal layer, which constitutes the ground of the antenna. The helical radiating arm is connected to the substrate, and one end of the helical radiating arm is electrically connected to the first metal layer. The helical radiating arm is used to radiate a first frequency band signal, and the helical radiating arm forms a helical space. At least a portion of the empty foil area is located within the helical space. One end of the first feed line is electrically connected to the helical radiating arm. The radiating component is disposed in the empty foil area and is located within the helical space. The radiating component is used to radiate a second frequency band signal, where the frequency of the first frequency band is lower than the frequency of the second frequency band. One end of the second feed line is electrically connected to the radiating component. The combiner is disposed on the first surface, and the first and second feed lines are respectively electrically connected to the combiner.

[0006] In some embodiments, the helical radiation arm includes a first helical segment and a second helical segment. One end of the first helical segment is electrically connected to a first metal layer, and one end of the second helical segment is electrically connected to the other end of the first helical segment. The helical diameter of the second helical segment is larger than that of the first helical segment, and the radiation component is located within a portion of the helical space formed by the second helical segment.

[0007] In some embodiments, the second helical segment passes through the substrate so that the substrate can provide support for the second helical segment.

[0008] In some embodiments, a second metal layer is disposed on the second surface of the substrate, the second surface is opposite to the first surface, and the second metal layer is electrically connected to the first metal layer.

[0009] In some embodiments, the antenna further includes a ground plane connected to a substrate, the ground plane having a third surface, the third surface having a third metal layer disposed thereon, and the third metal layer being electrically connected to a first metal layer.

[0010] In some embodiments, the ground plane further has a fourth surface opposite to the third surface, and the fourth surface is provided with a fourth metal layer, which is electrically connected to the third metal layer.

[0011] In some embodiments, the antenna further includes a connection terminal embedded in a ground plane, with one end of the connection terminal electrically connected to a third metal layer and the other end of the connection terminal electrically connected to a fourth metal layer.

[0012] In some embodiments, the radiating assembly includes a first radiating arm, a second radiating arm, a third radiating arm, a fourth radiating arm, a first feed section, and a second feed section. The first feed section and the second feed section are both disposed in the empty foil area and spaced apart from each other. The first radiating arm is electrically connected to one end of the first feed section, the second radiating arm is electrically connected to the other end of the first feed section, the third radiating arm is electrically connected to one end of the second feed section, and the fourth radiating arm is electrically connected to the other end of the second feed section. The second feed line includes an inner conductor and an outer conductor that are insulated from each other. One end of the inner conductor is electrically connected to the first feed section, and the other end of the inner conductor is electrically connected to a combiner. One end of the outer conductor is electrically connected to the second feed section, and the other end of the outer conductor is electrically connected to the first metal layer.

[0013] In some embodiments, the second feeder passes through a portion of the spiral space formed by the first spiral segment.

[0014] To solve the above-mentioned technical problems, another technical solution adopted in this utility model embodiment is to provide a drone, including the antenna described above.

[0015] The beneficial effects of this utility model embodiment are as follows: Unlike the prior art, in this utility model embodiment, by setting an empty foil area and a grounding area on the first surface of the substrate, the grounding area is at least partially covered by a first metal layer, and the first metal layer constitutes the ground of the antenna; a spiral radiating arm is set on the substrate, and the spiral radiating arm is electrically connected to the first metal layer to realize the grounding of the spiral radiating arm. The spiral radiating arm is used to radiate a first frequency band signal, and the spiral radiating arm forms a spiral space. By setting the radiating component in the spiral space, the radiating component is used to radiate a second frequency band signal, so that the antenna can radiate two frequency band signals, and the utilization rate in the spiral space is improved, the space waste in the spiral space is reduced, which is conducive to the miniaturization design of the antenna. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the specific embodiments of this utility model or the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. In all the drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, the elements or parts are not necessarily drawn to actual scale.

[0017] Figure 1 This is a schematic diagram of the antenna provided in the embodiment of the present invention from a first-view perspective;

[0018] Figure 2 yes Figure 1 An enlarged view of the area shown in section A;

[0019] Figure 3 yes Figure 1 An enlarged view of the area shown in section B;

[0020] Figure 4 This is a schematic diagram of the structure of the spiral radiating arm provided in the embodiment of this utility model;

[0021] Figure 5 This is an exploded structural diagram of the substrate and ground plane provided in the embodiments of this utility model;

[0022] Figure 6 This is a schematic diagram of the antenna provided in the embodiment of the present invention from a second viewpoint;

[0023] Figure 7 This is an exploded structural diagram of the ground plane and connecting terminal provided in the embodiments of this utility model.

[0024] Attached icon number

[0025]

[0026] Detailed Implementation

[0027] To facilitate understanding of this utility model, a more detailed description is provided below with reference to the accompanying drawings and specific embodiments. It should be noted that when an element is described as "fixed to" another element, it can be directly on the other element, or one or more intermediate elements may exist between them. When an element is described as "connected" to another element, it can be directly connected to the other element, or one or more intermediate elements may exist between them. The terms "upper," "lower," "inner," "outer," "vertical," "horizontal," etc., used in this specification indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0028] Unless otherwise defined, all technical and scientific terms used in this specification have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used in this specification is for the purpose of describing particular embodiments only and is not intended to limit the scope of the invention. The term "and / or" as used in this specification includes any and all combinations of one or more of the associated listed items.

[0029] Furthermore, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0030] Please see Figure 1 , Figure 2 and Figure 3The antenna 100 includes a substrate 1, a helical radiating arm 2, a radiating component 3, a first feed line 4, a second feed line 5, and a combiner 6. The substrate 1 has a first surface 11, which includes an empty foil area 111 and a grounding area 112. At least a portion of the grounding area 112 is covered by a first metal layer 113, which serves as the ground for the antenna 100. The helical radiating arm 2 is helically arranged to form a helical space 21, and is used to radiate a first frequency band signal. The helical radiating arm 2 is connected to the substrate 1, with at least a portion of the substrate 1 located within the helical space 21. The substrate 1 provides support for the helical radiating arm 2, and one end of the helical radiating arm 2 is electrically connected to the first metal layer 113 to ground the helical radiating arm 2, thereby enabling it to radiate signals. The radiating component 3 is disposed in the empty foil area 111 of the substrate 1 and is located within the helical space 21. The radiating component 3 is used to radiate a second frequency band signal. The combiner 6 is disposed on the first surface 11 of the substrate 1. One end of the first feed line 4 is electrically connected to the helical radiating arm 2, and the other end of the first feed line 4 is electrically connected to the combiner 6. The first feed line 4 is used to realize signal transmission between the helical radiating arm 2 and the combiner 6. One end of the second feed line 5 is electrically connected to the radiating component 3, and the other end of the second feed line 5 is electrically connected to the combiner 6. The second feed line 5 is used to realize signal transmission between the radiating component 3 and the combiner 6. The combiner 6 is also electrically connected to other components (e.g., circuit boards) through the third feed line 8, thereby realizing the transmission of the first frequency band signal and the second frequency band signal between the antenna 100 and other components. In this embodiment, by providing an empty foil area 111 and a grounding area 112 on the first surface 11 of the substrate 1, and at least partially covering the grounding area 112 with a first metal layer 113, the first metal layer 113 constitutes the ground of the antenna 100; a spiral radiating arm 2 is disposed on the substrate 1 and electrically connected to the first metal layer 113 to achieve grounding of the spiral radiating arm 2; the spiral radiating arm 2 is used to radiate a first frequency band signal; the spiral radiating arm 2 forms a spiral space 21; by disposing of a radiating component 3 in the spiral space 21, the radiating component 3 is used to radiate a second frequency band signal, so that the antenna 100 can radiate two frequency band signals, and the utilization rate within the spiral space 21 is improved, which is beneficial to the miniaturization design of the antenna 100.

[0031] In some embodiments, the helical radiating arm 2 includes a first helical segment 22 and a second helical segment 23. One end of the first helical segment 22 is electrically connected to the first metal layer 113, and one end of the second helical segment 23 is electrically connected to the other end of the first helical segment 22. Both the first helical segment 22 and the second helical segment 23 are helical, and the helical diameter of the second helical segment 23 is larger than that of the first helical segment 22. The radiating component 3 is located within the partial helical space 21 formed by the second helical segment 23. In this embodiment, by making the helical diameter of the first helical segment 22 smaller than that of the second helical segment 23, it is beneficial to reduce the space occupied by the helical radiating arm 2. However, the larger helical diameter of the second helical segment 23 allows the radiating component 3 to be disposed within the partial helical space 21 formed by the first helical segment 22, which can reduce the interference between the radiating component 3 and the helical radiating arm 2, thereby improving the radiation intensity of the antenna 100 for the first and second frequency band signals.

[0032] Further, please refer to Figure 1 and Figure 2 The spiral centerline of the second spiral segment 23 is located on the first surface 11 of the substrate 1. Since the radiation component 3 is disposed on the first surface 11, the distance between the radiation component 3 and the second spiral segment 23 can be relatively large, thereby minimizing the interference between the radiation component 3 and the spiral radiation arm 2.

[0033] In some embodiments, please refer to Figure 4 The first frequency band signal has a frequency range of 298MHz to 299MHz, and the second frequency band signal has a frequency range of 6.19GHz to 6.43GHz. The helical diameter of the second helical segment 23 is D, and satisfies: D≥242.35mm. The helical radiating arm 2 is obtained by extending a wire in a helical shape, and the diameter of the wire is less than 2.33mm. The helical pitch of the second helical segment 23 is S, and satisfies: S≥12.12mm. (Please refer to [reference needed]). Figure 1 and Figure 4 The so-called helical spacing refers to the distance between two adjacent helical lines when viewed along the first direction X, which is perpendicular to the first surface 11. Since the frequency range of the second frequency band signal is 6.19 GHz to 6.43 GHz, the wavelength λ of the second frequency band signal is 46.66 mm to 48.47 mm. That is to say, the diameter of the wire in the helical radiating arm 2 is less than one-twentieth of the wavelength of the second frequency band signal, the frequency of the second frequency band signal is greater than 15 times the frequency of the first frequency band, the helical diameter D of the second helical segment 23 is greater than 5 times the wavelength of the second frequency band, and the helical spacing S of the second helical segment 23 is greater than one-quarter of the wavelength λ of the second frequency band signal, thus minimizing the mutual interference between the helical radiating arm 2 and the radiating component 3.

[0034] In some embodiments, please refer to Figure 1 The second helical segment 23 passes through the substrate 1, thereby allowing the substrate 1 to provide support for the second helical segment 23. In this embodiment, since the helical diameter and helical pitch of the second helical segment 23 are relatively large, by having the second helical segment 23 pass through the substrate 1, the substrate 1 can provide support for the second helical segment 23, which can reduce the deformation of the second helical segment 23 and reduce the impact of the deformation of the second helical segment 23 on the radiation signal.

[0035] In some embodiments, please refer to Figure 5 The substrate 1 includes a first plate 13 and a second plate 14. One end of the first plate 13 is connected to the second plate 14, and the first plate 13 and the second plate 14 are generally T-shaped together. The aforementioned contact area 112 is located on the first plate 13. (Please refer to...) Figure 1 The first plate 13 is provided with a relief groove 131, and the first helical segment 22 is located in the relief groove 131 along the second direction Y. The second plate 14 is provided with a plurality of through holes 141, which are distributed in two rows at intervals. The second helical segment 23 passes through the plurality of through holes 141 in sequence, so that the second plate 14 can support the second helical segment 23, thereby maintaining the helical shape of the second helical segment 23 and reducing the risk of deformation of the second helical segment 23. The second direction Y is parallel to the first surface 11 and perpendicular to the arrangement direction of the first plate 13 and the second plate 14.

[0036] In some embodiments, the second helical segment 23 is welded and fixed to the second plate 14, thereby reducing the risk of the second helical segment 23 swaying along the axial direction of the through hole 141 and improving the structural strength of the second helical segment 23.

[0037] It is worth noting that the end of the first helical segment 22 furthest from the second helical segment 23 is welded and fixed to the first metal layer 113. Since the first helical segment 22 is connected to the second helical segment 23, and the helical diameter of the first helical segment 22 is relatively small, the first helical segment 22 can maintain its helical shape without being supported by the first plate 13. Of course, in some embodiments, multiple through holes (not shown) can also be provided on the first plate 13. The multiple through holes on the first plate 13 are respectively provided on both sides of the relief groove 131. The first helical segment 22 passes through the multiple through holes in sequence, so that the first plate 13 can provide support for the first helical segment 22, thereby increasing the structural strength of the first helical segment 22.

[0038] In some embodiments, please refer to Figure 1 and Figure 6A second metal layer 121 is disposed on the second surface 12 of the substrate 1. The second metal layer 121 is electrically connected to the first metal layer 113, so that the first metal layer 113 and the second metal layer 121 together constitute the ground of the antenna 100. The second surface 12 of the substrate 1 is opposite to the first surface 11 along the first direction X. In this embodiment, by providing the second metal layer 121 and electrically connecting it to the first metal layer 113, the ground area of ​​the antenna 100 is increased, which is beneficial to improving the radiation performance and the stability of the radiated signal of the antenna 100.

[0039] In some embodiments, please refer to Figure 1 and Figure 5 The antenna 100 also includes a ground plane 7, which is connected to the substrate 1. The ground plane 7 has a third surface 71, which is perpendicular to the first surface 11. A third metal layer 711 is disposed on the third surface 71. The third metal layer 711 is electrically connected to the first metal layer 113 and also electrically connected to the second metal layer 121, so that the first metal layer 113, the second metal layer 121 and the third metal layer 711 together constitute the ground of the antenna 100, thereby further increasing the ground area of ​​the antenna 100 and thus improving the radiation performance and the stability of the radiated signal of the antenna 100.

[0040] Furthermore, the ground plane 7 is connected to the first plate 13 of the substrate 1, and viewed along the first direction X, the ground plane 7 divides the first surface 11 of the substrate 1 into the aforementioned grounding area 112 and the empty foil area 111. The aforementioned spiral radiating arm 2 and radiating assembly 3 are both located on the side of the ground plane 7 facing away from the grounding area 112, and the aforementioned second metal layer 121 is located on the side of the ground plane 7 facing the grounding area 112. This arrangement reduces the impact of the first metal layer 113 and the second metal layer 121 on the spiral radiating arm 2 and the radiating assembly 3, allowing for more flexible arrangement of the spiral radiating arm 2 and the radiating module.

[0041] Furthermore, the ground plane 7 also has a fourth surface 72, which is disposed opposite to the third surface 71 in a third direction Z, which is perpendicular to the first direction X and the second direction Y. The fourth surface 72 is provided with a fourth metal layer 721, which is electrically connected to the third metal layer 711. Thus, the first metal layer 113, the second metal layer 121, the third metal layer 711 and the fourth metal layer 721 together constitute the ground of the antenna 100, thereby further increasing the ground area of ​​the antenna 100 and improving the radiation performance and stability of the radiated signal of the antenna 100.

[0042] In some embodiments, please refer to Figure 7The ground plane 7 has an embedded connection terminal 9. One end of the connection terminal 9 is connected to the third metal layer 711 and the other end is connected to the fourth metal layer 721, thereby realizing the electrical connection between the third metal layer 711 and the fourth metal layer 721.

[0043] In some embodiments, please refer to Figure 7 The system comprises multiple connection terminals 9, each embedded within the ground plane 7. One end of each connection terminal 9 is electrically connected to the third metal layer 711, and the other end is electrically connected to the fourth metal layer 721. In this embodiment, by providing multiple connection terminals 9, multiple connection channels can be formed between the third metal layer 711 and the fourth metal layer 721, thereby improving the stability of the electrical connection between the two layers.

[0044] For the radiation component 3 mentioned above, please refer to... Figure 1 and Figure 2 The radiating assembly 3 includes a first radiating arm 31, a second radiating arm 32, a third radiating arm 33, a fourth radiating arm 34, a first feed section 35, and a second feed section 36. The first radiating arm 31, the second radiating arm 32, the third radiating arm 33, the fourth radiating arm 34, the first feed section 35, and the second feed section 36 are all disposed in the empty foil region 111, and the first feed section 35 and the second feed section 36 are spaced apart along a third direction Z. One end of the first radiating arm 31 is electrically connected to one end of the first feed section 35, and the other end of the first radiating arm 31 extends in a direction away from the second feed section 36. One end of the second radiating arm 32 is electrically connected to the other end of the first feed section 35, and the other end of the second radiating arm 32 extends in a direction away from the second feed section 36. One end of the third radiating arm 33 is electrically connected to one end of the second feed section 36, and the other end of the third radiating arm 33 extends in a direction away from the first feed section 35. One end of the fourth radiating arm 34 is electrically connected to the other end of the second feed section 36, and the other end of the fourth radiating arm 34 extends in a direction away from the first feed section 35. The first radiating arm 31, the second radiating arm 32, the third radiating arm 33, and the fourth radiating arm 34 are used together to radiate the second frequency band signal.

[0045] For the second feeder 5 mentioned above, please refer to Figure 2 and Figure 3 The second feed line 5 includes an inner conductor 51 and an outer conductor 52 that are insulated from each other, with the outer conductor 52 enclosing the inner conductor 51. One end of the inner conductor 51 is electrically connected to the first feed section 35, and the other end is electrically connected to the combiner 6. One end of the outer conductor 52 is electrically connected to the second feed section 36, and the other end is electrically connected to the first metal layer 113, which is also electrically connected to the combiner 6. This allows the second frequency band signal to be transmitted between the combiner 6 and the radiating component 3 via the second feed line 5.

[0046] Furthermore, the grounding area 112 is also provided with a first connecting portion 1121 and a second connecting portion 1122. Both the first connecting portion 1121 and the second connecting portion 1122 are separated from the first metal layer 113, that is, neither the first connecting portion 1121 nor the second connecting portion 1122 is electrically connected to the first metal layer 113. The end of the first feed line 4 away from the spiral radiating arm 2 is electrically connected to the first connecting portion 1121. The first connecting portion 1121 is also electrically connected to the combiner 6, thereby realizing signal transmission between the combiner 6 and the spiral radiating arm 2. The inner conductor 51 of the second feed line 5 is electrically connected to the second connecting portion 1122. The second connecting portion 1122 is electrically connected to the combiner 6, so as to realize signal transmission between the combiner 6 and the radiating component 3.

[0047] In some embodiments, please refer to Figure 1 and Figure 3 One end of the first feed line 4 is connected to the end of the first helical segment 22 near the second helical segment 23, and the first feed line 4 passes through the partial helical space 21 formed by the first helical segment 22 before being connected to the first connecting part 1121. In this embodiment, by passing the first feed line 4 through the inside of the first helical segment 22, the internal space of the helical radiating arm 2 is utilized, which facilitates wiring and saves space.

[0048] In some embodiments, the second feed line 5 passes through a portion of the spiral space 21 formed by the first spiral segment 22, thereby utilizing the internal space of the spiral radiating arm 2, which facilitates wiring and saves space.

[0049] In some embodiments, please refer to Figure 1 The antenna 100 also includes a third feed line 8, one end of which is electrically connected to the combiner 6, and the other end of which is used to connect to other components (such as a circuit board) so that the signal radiated by the antenna 100 can be transmitted to other components.

[0050] In this embodiment of the present invention, by setting an empty foil area 111 and a grounding area 112 on the first surface 11 of the substrate 1, at least partially covering the grounding area 112 with a first metal layer 113, the first metal layer 113 constitutes the ground of the antenna 100; a spiral radiating arm 2 is disposed on the substrate 1 and electrically connected to the first metal layer 113 to achieve grounding of the spiral radiating arm 2, the spiral radiating arm 2 is used to radiate a first frequency band signal, the spiral radiating arm 2 forms a spiral space 21, and by disposing of a radiating component 3 in the spiral space 21, the radiating component 3 is used to radiate a second frequency band signal, so that the antenna 100 can radiate two frequency band signals, and the utilization rate of the spiral space 21 is improved, the space waste of the spiral space 21 is reduced, which is beneficial to the miniaturization design of the antenna 100.

[0051] This utility model also provides an embodiment of a drone, which includes the antenna described above. For the specific structure and function of the antenna, please refer to the above embodiment, which will not be repeated here.

[0052] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made based on the description and drawings of this utility model, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. An antenna, characterized in that, include: A substrate having a first surface, the first surface including an empty foil area and a ground area, the ground area being at least partially covered by a first metal layer, the first metal layer constituting the ground of the antenna; A spiral radiating arm is connected to the substrate, one end of the spiral radiating arm is electrically connected to the first metal layer, the spiral radiating arm is used to radiate a first frequency band signal, the spiral radiating arm forms a spiral space, and at least a portion of the empty foil area is located within the spiral space; The first feeder has one end electrically connected to the spiral radiating arm; A radiating component is disposed in the empty foil area and located within the spiral space. The radiating component is used to radiate a second frequency band signal, wherein the frequency of the first frequency band is lower than the frequency of the second frequency band. The second feeder has one end electrically connected to the radiating component; A combiner is disposed on the first surface, and the first feeder and the second feeder are respectively electrically connected to the combiner.

2. The antenna according to claim 1, characterized in that, The spiral radiation arm includes a first spiral segment and a second spiral segment. One end of the first spiral segment is electrically connected to the first metal layer, and one end of the second spiral segment is electrically connected to the other end of the first spiral segment. The spiral diameter of the second spiral segment is larger than that of the first spiral segment, and the radiation component is located within the partial spiral space formed by the second spiral segment.

3. The antenna according to claim 2, characterized in that, The second helical segment passes through the substrate so that the substrate can provide support for the second helical segment.

4. The antenna according to claim 1, characterized in that, A second metal layer is disposed on the second surface of the substrate, the second surface being opposite to the first surface, and the second metal layer being electrically connected to the first metal layer.

5. The antenna according to claim 4, characterized in that, The antenna further includes a ground plane connected to the substrate. The ground plane has a third surface, on which a third metal layer is disposed. The third metal layer is electrically connected to the first metal layer.

6. The antenna according to claim 5, characterized in that, The ground plane also has a fourth surface, which is opposite to the third surface. The fourth surface is provided with a fourth metal layer, which is electrically connected to the third metal layer.

7. The antenna according to claim 6, characterized in that, The ground plane is embedded with a connection terminal, and one end of the connection terminal is electrically connected to the third metal layer, and the other end of the connection terminal is electrically connected to the fourth metal layer.

8. The antenna according to claim 1, characterized in that, The radiation assembly includes a first radiation arm, a second radiation arm, a third radiation arm, a fourth radiation arm, a first feed section, and a second feed section. The first feed section and the second feed section are both disposed in the empty foil area and are spaced apart from each other. The first radiation arm is electrically connected to one end of the first feed section, the second radiation arm is electrically connected to the other end of the first feed section, the third radiation arm is electrically connected to one end of the second feed section, and the fourth radiation arm is electrically connected to the other end of the second feed section. The second feeder includes an inner conductor and an outer conductor that are insulated from each other. One end of the inner conductor is electrically connected to the first feeder and the other end of the inner conductor is electrically connected to the combiner. One end of the outer conductor is electrically connected to the second feeder and the other end of the outer conductor is electrically connected to the first metal layer.

9. The antenna according to claim 2, characterized in that, The second feeder is inserted into a portion of the spiral space formed by the first spiral segment.

10. A drone, characterized in that, Including the antenna as described in any one of claims 1-9.

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