Antenna and electronic equipment

Abstract

The utility model provides an antenna and electronic equipment, and the antenna comprises a resonant ring which comprises an annular base part with a first opening; and the first periodic structure and the second periodic structure are both located in a space defined by the annular base part and are both connected with the resonant ring. Through the arrangement, a metamaterial structure is formed, the electrical performance of the antenna can be improved, the physical characteristics such as negative magnetic conductivity and negative electrical conductivity can be realized, the performance of the antenna can be improved, and the wiring area and the occupied space of the antenna can be reduced.

Description

Technical Field

[0001] The present application relates to the field of antenna technology, and in particular to an antenna and electronic equipment. Background Art

[0002] With the development of technology, electronic devices need to support more and more frequency bands, so the number of antennas contained in electronic devices is increasing.

[0003] Currently, due to limitations in the internal space of electronic devices and losses caused by matching topology, antenna performance is not ideal and suffers from poor radiation performance. Utility Model Content

[0004] In view of this, the present application provides an antenna and an electronic device, which can improve the performance of the antenna.

[0005] Specifically, the following technical solutions are included:

[0006] In a first aspect, an embodiment of the present application provides an antenna, comprising:

[0007] The resonant ring comprises an annular base having a first opening;

[0008] The first periodic structure and the second periodic structure having the same shape are both located in the space enclosed by the annular base and are both connected to the resonant ring.

[0009] In an optional embodiment, the first periodic structure and the second periodic structure are spaced apart along the second direction and are symmetrical about a first symmetry axis, and the first symmetry axis extends along the first direction; the first periodic structure and the second periodic structure are symmetrical about a second symmetry axis, respectively, and the second symmetry axis extends along the second direction, and the first direction is perpendicular to the second direction.

[0010] In an optional embodiment, the resonant ring further includes a first connecting portion and a second connecting portion connected to the annular base, wherein the first connecting portion and the second connecting portion are both located on one side of the annular base in a third direction, and the third direction is perpendicular to the first direction and the second direction, respectively;

[0011] A line connecting two ends of the first opening extends along a first direction. The first connecting portion and the second connecting portion are respectively located on both sides of the first opening in the first direction, and the first connecting portion and the second connecting portion are spaced apart to form a second opening.

[0012] In an optional embodiment, the antenna further includes a first arm and a second arm, the first arm being connected to the first periodic structure and the annular base, respectively, and the second arm being connected to the second periodic structure and the first connecting portion, respectively;

[0013] The first arm and the second arm are respectively symmetrical about the second symmetry axis.

[0014] In an optional embodiment, the first connecting portion is provided with a feeding point, and the second connecting portion is provided with a first grounding point.

[0015] In an optional embodiment, the first connecting portion is further provided with a second grounding point, and the first grounding point and the second grounding point are respectively located on two sides of the feeding point in the first direction.

[0016] In an optional embodiment, the first periodic structure includes a first body extending along the first direction, and the first arm is connected at a midpoint of the first body;

[0017] The second periodic structure includes a second body extending along the first direction, and the second arm is connected at a midpoint of the second body.

[0018] In an optional embodiment, the first periodic structure further includes two first branches extending along the second direction, and the two first branches are respectively connected to two ends of the first body;

[0019] The second periodic structure further includes two second branches extending along the second direction, and the two second branches are respectively connected to two ends of the second body.

[0020] In an optional embodiment, the two first branches extend from the end of the first body to the side away from the second branch, and the two second branches extend from the end of the second body to the side away from the first branch.

[0021] Alternatively, the two first branches extend from the end of the first body to the side close to the second branch, and the two second branches extend from the end of the second body to the side close to the first branch.

[0022] In an optional embodiment, the width W and length L of the antenna satisfy:

[0023] W+L=1 / 3λ;

[0024] Wherein, λ is the wavelength corresponding to the working frequency band of the antenna.

[0025] In an optional embodiment, the interval D1 between the first periodic structure and the second periodic structure in the second direction is 1 / 64λ to 1 / 16λ.

[0026] In an optional embodiment, the ring width D2 of the annular base is 1 / 32λ to 1 / 16λ.

[0027] In a second aspect, an embodiment of the present application provides an electronic device, comprising the antenna provided by any embodiment of the first aspect.

[0028] In an optional embodiment, the electronic device further comprises a metal housing, a plastic bracket and a circuit board;

[0029] The plastic bracket is disposed in the metal housing, and the antenna is attached to the plastic bracket and electrically connected to the circuit board;

[0030] The metal shell is provided with a through hole, and the antenna is located at the through hole.

[0031] In an optional embodiment, the electronic device further includes a decorative piece, which is protruded from the metal housing and arranged around the periphery of the through hole, so that the antenna is located in a space surrounded by the decorative piece.

[0032] The beneficial effects of the technical solution provided by the embodiments of the present application include at least: by providing a resonant ring with a first opening and a first periodic structure and a second periodic structure, a metamaterial structure is formed, which can improve the electrical performance of the antenna and achieve physical properties such as negative magnetic permeability and negative electrical conductivity, which is beneficial to improving the antenna performance and reducing the antenna routing area and occupied space; at the same time, since the first periodic structure and the second periodic structure have the same shape, the gain and radiation efficiency of the antenna are improved by utilizing the conformal design of the first periodic structure and the second periodic structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0034] Figure 1 A schematic diagram of the structure of an antenna provided in some embodiments of the present application;

[0035] Figure 2 A schematic structural diagram of an antenna on a first side provided in some other embodiments of the present application;

[0036] Figure 3 A schematic structural diagram of the antenna on the second side provided in some other embodiments of the present application;

[0037] Figure 4 One of the three-dimensional diagrams of antennas provided in some other embodiments of the present application;

[0038] Figure 5A second perspective view of an antenna provided in accordance with another embodiment of the present application;

[0039] Figure 6 Schematic diagram of the coordination between the antenna and the first, second and third spring clips provided in other embodiments of the present application;

[0040] Figure 7 A partial schematic diagram of an electronic device provided for some embodiments of the present application.

[0041] The reference numerals in the figures represent:

[0042] 1-antenna; 11-resonant ring; 111-annular base; 112-first connecting portion; 112a-feeding point; 112b-second grounding point; 113-second connecting portion; 113a-first grounding point; 114-first opening; 115-second opening; 12-first periodic structure; 121-first main body; 122-first branch; 13-second periodic structure; 131-second main body; 132-second branch; 14-first bent branch; 15-second bent branch; 16-first arm; 17-second arm;

[0043] 2-metal housing; 21-through hole; 3-plastic bracket; 4-circuit board; 41-first spring; 42-second spring; 43-third spring; 5-decorative part.

[0044] The above drawings illustrate specific embodiments of the present application, which will be described in more detail below. These drawings and the textual description are not intended to limit the scope of the present application in any way, but rather to illustrate the concepts of the present application to those skilled in the art by reference to specific embodiments. DETAILED DESCRIPTION

[0045] The following will be combined with the drawings in the embodiments of this application to clearly and completely describe the technical solutions in the embodiments of this application. Obviously, the embodiments described are part of the embodiments of this application, not all of them. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0046] The directional nouns involved in the embodiments of this application, such as "upper", "lower", "side", etc., are generally expressed in the form of Figure 1 The relative relationships shown in the figure are used as a reference, and these directional terms are used only to more clearly describe the relationship between structures, not to describe absolute directions. When the product is placed in different postures, the direction may change, for example, "up" and "down" may be interchangeable.

[0047] Unless otherwise defined, all technical terms used in the examples of this application have the same meanings as those commonly understood by those skilled in the art. Some technical terms that appear in the examples of this application are explained below.

[0048] In order to make the technical solutions and advantages of the present application clearer, the implementation methods of the present application will be described in further detail below with reference to the accompanying drawings.

[0049] like Figures 1 to 6 As shown, the antenna 1 provided in the embodiment of the present application includes a resonant ring 11, a first periodic structure 12 and a second periodic structure 13 of the same shape.

[0050] The resonant ring 11 includes an annular base 111 having a first opening 114. Exemplarily, a line connecting two ends of the first opening 114 extends along a first direction X.

[0051] Specifically, the annular base 111 is annular, for example Figure 1 As shown, the annular base 111 is in the shape of a rectangular ring. Optionally, the annular base 111 can also be in the shape of a circular ring, an elliptical ring, a triangular ring or other polygonal rings.

[0052] The first periodic structure 12 and the second periodic structure 13 are both located in the space enclosed by the annular base 111 and are both connected to the resonant ring 11. Figure 1 As shown, the first periodic structure 12 and the second periodic structure 13 are both located inside the annular base 111 , wherein the first periodic structure 12 and the second periodic structure 13 can generate energy coupling.

[0053] The first periodic structure 12 and the second periodic structure 13 have the same shape, forming a conformal design. Furthermore, the first periodic structure 12 and the second periodic structure 13 also have the same size.

[0054] Resonant ring 11 is an open resonant ring, a special unit structure used to construct metamaterials. By arranging the open resonant ring 11, the first periodic structure 12, and the second periodic structure 13, a metamaterial structure is formed. Leveraging the properties of the metamaterial, antenna 1 is miniaturized while also improving its performance, resolving the existing technical issue of poor antenna radiation performance due to spatial limitations.

[0055] Among them, those skilled in the art will understand that metamaterial is a general term for a new type of artificial composite structure or composite material with extraordinary physical properties not possessed by natural materials. It includes metal or dielectric periodic structures with sizes and spacings much smaller than the operating wavelength. Its characteristic is that a unit structure is constructed to simulate the atoms of traditional materials, and then this unit structure is used to form a periodic material. Metamaterials can be designed to exhibit extraordinary physical properties such as negative dielectric constant, negative magnetic permeability, negative refractive index, and inverse Doppler effect. Its series of unique properties do not mainly depend on the intrinsic properties of the constituent materials, but are determined by factors such as the pattern shape, size, arrangement of the metamaterial unit structure and the electromagnetic parameters of the dielectric layer.

[0056] The antenna 1 provided in the embodiment of the present application forms a metamaterial structure by providing a resonant ring 11 having a first opening 114 and a first periodic structure 12 and a second periodic structure 13, which can improve the electrical performance of the antenna 1 and achieve physical properties such as negative magnetic permeability and negative electrical conductivity, which is beneficial to improving the performance of the antenna 1 and reducing the routing area and occupied space of the antenna 1; at the same time, since the first periodic structure 12 and the second periodic structure 13 have the same shape, the gain and radiation efficiency of the antenna 1 are improved by utilizing the conformal design of the first periodic structure 12 and the second periodic structure 13.

[0057] In a further embodiment, Figure 1 As shown, the first periodic structure 12 and the second periodic structure 13 are spaced apart along the second direction Y and are symmetrical about the first symmetry axis a, and the first symmetry axis a extends along the first direction X; the first periodic structure 12 and the second periodic structure 13 are symmetrical about the second symmetry axis b, respectively, and the second symmetry axis b extends along the second direction Y, and the first direction X is perpendicular to the second direction Y.

[0058] That is, the first symmetry axis a and the second symmetry axis b are perpendicular to each other, and the first periodic structure 12 and the second periodic structure 13 have the same shape and size. This arrangement can fully utilize the metamaterial properties and improve the gain and radiation efficiency of the antenna 1.

[0059] In a further embodiment, Figure 4 As shown, the resonant ring 11 further includes a first connecting portion 112 and a second connecting portion 113 connected to the annular base 111. The first connecting portion 112 and the second connecting portion 113 are both located on one side of the annular base 111 in the third direction Z. The third direction Z is perpendicular to the first direction X and the second direction Y, respectively. Figure 1 As shown, the line connecting the two ends of the first opening 114 extends along the first direction X, the first connecting portion 112 and the second connecting portion 113 are respectively located on both sides of the first opening 114 in the first direction X, and the first connecting portion 112 and the second connecting portion 113 are spaced apart to form a second opening 115.

[0060] Both the first connecting portion 112 and the second connecting portion 113 are electrically conductive. Exemplarily, the first connecting portion 112 and the second connecting portion 113 are used to electrically connect to the circuit board 4 of the electronic device to provide power feeding and grounding for the antenna 1. Optionally, both the first connecting portion 112 and the second connecting portion 113 are metal sheets.

[0061] For example, Figure 1 As shown, the first connecting portion 112 and the first end of the annular base 111 at the first opening 114 (ie Figure 1 The second connecting portion 113 is located at the second end of the annular base 111 at the first opening 114 (ie Figure 1 The right end in FIG) is away from the side of the first connecting portion 112 (ie Figure 1 The linear dimension of the second opening 115 in the first direction X is greater than the linear dimension of the first opening 114 in the first direction X.

[0062] Second opening 115 acts as a spatial capacitor, generating spatial inductance along the thickness of resonant ring 11. Therefore, at specific frequencies, electromagnetic waves resonate, thereby altering their propagation. By providing first opening 114 and second opening 115, the two ends of resonant ring 11 are disconnected, ensuring that antenna 1 properly radiates electromagnetic waves.

[0063] For example, Figure 4 and Figure 5 As shown, the antenna 1 also includes a first bent branch node 14 and a second bent branch node 15 arranged at intervals along the first direction X, the first bent branch node 14 is used to connect the first connecting portion 112 and the annular base 111, and the second bent branch node 15 is used to connect the second connecting portion 113 and the annular base 111, the first bent branch node 14 is connected to the first end of the annular base 111 at the first opening 114, and the second bent branch node 15 is connected to the second end of the annular base 111 at the first opening 114.

[0064] Exemplarily, when the annular base 111 is attached to the upper surface of the plastic bracket 3 of the electronic device, the first connecting portion 112 and the second connecting portion 113 are located on the lower side of the plastic bracket 3, and the first bent branch 14 and the second bent branch 15 bypass the side wall of the plastic bracket 3 and extend into the lower side of the plastic bracket 3.

[0065] In a further embodiment, Figure 1 As shown, the antenna 1 also includes a first arm 16 and a second arm 17, the first arm 16 is respectively connected to the first periodic structure 12 and the annular base 111, and the second arm 17 is respectively connected to the second periodic structure 13 and the first connecting portion 112; the first arm 16 and the second arm 17 are symmetrical about the second symmetry axis b.

[0066] like Figure 1 As shown, the first arm 16 and the second arm 17 are in the shape of a plate or a strip, the first periodic structure 12 is connected to the annular base 111 via the first arm 16, and the second periodic structure 13 is connected to the first connecting portion 112 via the second arm 17. Specifically, the second arm 17 is connected to the first bent branch 14, and the second arm 17 is spaced apart from the second end of the annular base 111 at the first opening 114.

[0067] In a specific embodiment, the first connecting portion 112 is provided with a feeding point 112 a , and the second connecting portion 113 is provided with a first grounding point 113 a .

[0068] The antenna 1 receives and transmits signals through the feeding point 112 a , and the antenna 1 is grounded through the first grounding point 113 a to ensure normal operation of the antenna 1 .

[0069] In a further embodiment, the first connecting portion 112 is further provided with a second grounding point 112 b , and the first grounding point 113 a and the second grounding point 112 b are respectively located on two sides of the feeding point 112 a in the first direction X.

[0070] In this embodiment, the antenna 1 has two grounding points and one feeding point 112a to ensure grounding stability and reliability; by setting the first grounding point 113a and the second grounding point 112b respectively on both sides of the feeding point 112a in the first direction X, the normal operation of the antenna 1 is ensured.

[0071] For example, the circuit board 4 of the electronic device is provided with a first spring 41, a second spring 42 and a third spring 43 having conductive capabilities. Figure 6 As shown, the first spring piece 41 is used to electrically connect to the feed point 112a, the second spring piece 42 is used to electrically connect to the first ground point 113a, and the third spring piece 43 is used to electrically connect to the second ground point 112b. Through this arrangement, the antenna 1 is electrically connected to the circuit board 4.

[0072] In one embodiment, Figure 1 As shown, the first periodic structure 12 includes a first body 121 extending along the first direction X, and the first arm 16 is connected at the midpoint of the first body 121; the second periodic structure 13 includes a second body 131 extending along the first direction X, and the second arm 17 is connected at the midpoint of the second body 131.

[0073] In this embodiment, if Figure 1 As shown, the first body 121 and the second body 131 both extend along the first direction X, so that the first periodic structure 12 and the second periodic structure 13 are in a straight line shape.

[0074] Furthermore, if Figure 2As shown, the first periodic structure 12 also includes two first branches 122 extending along the second direction Y, and the two first branches 122 are respectively connected to the two ends of the first body 121; the second periodic structure 13 also includes two second branches 132 extending along the second direction Y, and the two second branches 132 are respectively connected to the two ends of the second body 131.

[0075] In this embodiment, if Figure 2 As shown, the first branch 122 / the second branch 132 can only bulge outward on one side relative to the first body 121 / the second body 131 in the second direction Y, so that the first periodic structure 12 / the second periodic structure 13 is roughly "U"-shaped; or, the first branch 122 / the second branch 132 can also bulge outward on both sides relative to the first body 121 / the second body 131 in the second direction Y, so that the first periodic structure 12 / the second periodic structure 13 is "H"-shaped.

[0076] Furthermore, if Figure 2 As shown, the two first branches 122 extend from the end of the first body 121 to the side away from the second branch 132, and the two second branches 132 extend from the end of the second body 131 to the side away from the first branch 122; or, the two first branches 122 extend from the end of the first body 121 to the side close to the second branch 132, and the two second branches 132 extend from the end of the second body 131 to the side close to the first branch 122.

[0077] In this embodiment, the first periodic structure 12 and the second periodic structure 13 are both roughly U-shaped. Figure 2 As shown, the first branch 122 and the second branch 132 extend in opposite directions; in other embodiments, the first branch 122 and the second branch 132 extend in the same direction.

[0078] In one embodiment, the width W and length L of the antenna 1 satisfy:

[0079] W+L=1 / 3λ;

[0080] Wherein, λ is the wavelength corresponding to the working frequency band of antenna 1.

[0081] For example, the antenna 1 is a WiFi antenna, and the operating frequency band of the antenna is 2.4 GHz, 5 GHz, etc. Of course, the antenna 1 can also be other types of antennas, and its operating frequency band can also be set according to actual needs, and this application will not give examples one by one.

[0082] like Figure 2 As shown, the width W is the linear dimension of the antenna 1 in the second direction Y, and the length L is the linear dimension of the antenna 1 in the first direction X.

[0083] In the prior art, the width and length of antenna 1 are often designed to be 1 / 4λ, meaning the sum of the width and length is typically 1 / 2λ. However, the antenna 1 provided in the embodiments of the present application utilizes the properties of metamaterials to improve its performance, enabling it to be reduced in size by 33%, reducing the space occupied by antenna 1 and facilitating a miniaturized design of antenna 1.

[0084] In a further embodiment, the interval D1 between the first periodic structure 12 and the second periodic structure 13 in the second direction Y is 1 / 64λ to 1 / 16λ.

[0085] This arrangement ensures the coupling effect between the first periodic structure 12 and the second periodic structure 13 , which helps to improve the performance of the antenna 1 .

[0086] In a further embodiment, Figure 2 As shown, the ring width of the annular base 111 is D2, and D2 is 1 / 32λ to 1 / 16λ.

[0087] It can be understood that when the annular base 111 is in a rectangular ring shape, the ring width of the long side of the annular base 111 can be the same as the ring width of the wide side, or different from the ring width of the wide side, and the ring width of the long side and the ring width of the wide side are both in the range of 1 / 32λ to 1 / 16λ.

[0088] In an optional embodiment, if Figure 2 As shown, the linear dimension of the first opening 114 in the first direction X is D3, and D3 is 1 / 32λ to 1 / 16λ. And / or, as Figure 3 As shown, the linear dimension of the second opening 115 in the first direction X is D4, and D4 is 1 / 32λ to 1 / 16λ.

[0089] An embodiment of the present application further provides an electronic device, which includes the antenna 1 provided in any of the above embodiments.

[0090] Electronic devices include but are not limited to mobile phones, tablet computers, laptops, handheld computers, walkie-talkies, netbooks, POS machines, driving recorders, wearable devices, virtual reality devices, wireless USB flash drives, Bluetooth speakers, Bluetooth headsets, or vehicle-mounted mobile or fixed terminals with antenna 1.

[0091] In a specific embodiment, Figure 7 As shown, the electronic device further includes a metal housing 2 , a plastic bracket 3 and a circuit board 4 .

[0092] The plastic bracket 3 is disposed in the metal housing 2 , and the antenna 1 is attached to the plastic bracket 3 and electrically connected to the circuit board 4 . The metal housing 2 is provided with a through hole 21 , and the antenna 1 is located at the through hole 21 .

[0093] Alternatively, as Figure 7 As shown, the electronic device further includes a decorative piece 5 , which is protruded from the metal housing 2 and surrounds the outer periphery of the through hole 21 , so that the antenna 1 is located in the space surrounded by the decorative piece 5 .

[0094] In this embodiment, by arranging the antenna 1 at the through hole 21 , it is possible to ensure that the antenna 1 radiates electromagnetic waves normally, thereby preventing the metal housing 2 from shielding the antenna 1 and causing signal attenuation.

[0095] Furthermore, the circuit board 4 is provided with a first spring piece 41, a second spring piece 42 and a third spring piece 43 having conductive capabilities. The resonant ring 11 also includes a first connecting portion 112 and a second connecting portion 113 connected to the annular base 111, and the first connecting portion 112 and the second connecting portion 113 are both located on one side of the annular base 111 in the third direction Z. The first connecting portion 112 and the second connecting portion 113 are respectively located on both sides of the first opening 114 in the first direction X, and the first connecting portion 112 and the second connecting portion 113 are spaced apart to form a second opening 115. The first connecting portion 112 is provided with a feeding point 112a and a second grounding point 112b, and the second connecting portion 113 is provided with a first grounding point 113a, and the first grounding point 113a and the second grounding point 112b are respectively located on both sides of the feeding point 112a in the first direction X. As Figure 6 As shown, the first elastic piece 41 is used to be electrically connected to the feeding point 112a, the second elastic piece 42 is used to be electrically connected to the first grounding point 113a, and the third elastic piece 43 is used to be electrically connected to the second grounding point 112b.

[0096] In this application, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance. The term "plurality" refers to two or more than two, unless expressly limited otherwise.

[0097] Those skilled in the art will readily appreciate other embodiments of the present invention after considering the specification and practicing the present invention disclosed herein. This application is intended to cover any variations, uses, or adaptations of the present invention that follow the general principles of the present invention and include common knowledge or customary techniques in the art not disclosed herein. The description and examples are to be considered as exemplary only.

[0098] It should be understood that the present application is not limited to the exact structures described above and shown in the drawings, and that various modifications and changes may be made without departing from the scope thereof. The scope of the present application is limited only by the appended claims.

Claims

1. An antenna (1), characterized in that The antenna (1) comprises: A resonant ring (11) comprising an annular base (111) provided with a first opening (114); The first periodic structure (12) and the second periodic structure (13) of the same shape are both located in the space enclosed by the annular base (111) and are both connected to the resonant ring (11).

2. The antenna (1) according to claim 1, characterized in that The first periodic structure (12) and the second periodic structure (13) are spaced apart along a second direction (Y) and are symmetrical about a first symmetry axis (a), and the first symmetry axis (a) extends along a first direction (X); the first periodic structure (12) and the second periodic structure (13) are symmetrical about a second symmetry axis (b), respectively, and the second symmetry axis (b) extends along a second direction (Y), and the first direction (X) is perpendicular to the second direction (Y).

3. The antenna (1) according to claim 2, characterized in that The resonant ring (11) further comprises a first connecting portion (112) and a second connecting portion (113) connected to the annular base (111), wherein the first connecting portion (112) and the second connecting portion (113) are both located on one side of the annular base (111) in a third direction (Z), and the third direction (Z) is perpendicular to the first direction (X) and the second direction (Y). A line connecting two ends of the first opening (114) extends along a first direction (X), the first connecting portion (112) and the second connecting portion (113) are respectively located on both sides of the first opening (114) in the first direction (X), and the first connecting portion (112) and the second connecting portion (113) are spaced apart to form a second opening (115).

4. The antenna (1) according to claim 3, characterized in that The antenna (1) further comprises a first arm (16) and a second arm (17), wherein the first arm (16) is connected to the first periodic structure (12) and the annular base (111) respectively, and the second arm (17) is connected to the second periodic structure (13) and the first connecting portion (112) respectively; The first arm (16) and the second arm (17) are symmetrical about the second symmetry axis (b).

5. The antenna (1) according to claim 3, characterized in that The first connecting portion (112) is provided with a feeding point (112a), and the second connecting portion (113) is provided with a first grounding point (113a).

6. The antenna (1) according to claim 5, characterized in that The first connecting portion (112) is further provided with a second grounding point (112b), and the first grounding point (113a) and the second grounding point (112b) are respectively located on both sides of the feeding point (112a) in the first direction (X).

7. The antenna (1) according to claim 4, characterized in that The first periodic structure (12) includes a first body (121) extending along the first direction (X), and the first arm (16) is connected at a midpoint of the first body (121); The second periodic structure (13) includes a second body (131) extending along the first direction (X), and the second arm (17) is connected at a midpoint of the second body (131).

8. The antenna (1) according to claim 7, characterized in that The first periodic structure (12) further includes two first branches (122) extending along the second direction (Y), and the two first branches (122) are respectively connected to two ends of the first body (121); The second periodic structure (13) further includes two second branches (132) extending along the second direction (Y), and the two second branches (132) are respectively connected to two ends of the second body (131).

9. The antenna (1) according to claim 8, characterized in that The two first branches (122) extend from the end of the first body (121) to the side away from the second branch (132), and the two second branches (132) extend from the end of the second body (131) to the side away from the first branch (122); Alternatively, the two first branches (122) extend from the end of the first body (121) to a side close to the second branch (132), and the two second branches (132) extend from the end of the second body (131) to a side close to the first branch (122).

10. The antenna (1) according to claim 2, characterized in that The width W and length L of the antenna (1) satisfy: W+L=1 / 3λ; Wherein, λ is the wavelength corresponding to the working frequency band of the antenna (1).

11. The antenna (1) according to claim 10, characterized in that The interval D1 between the first periodic structure (12) and the second periodic structure (13) in the second direction (Y) is 1 / 64λ to 1 / 16λ.

12. The antenna (1) according to claim 10, characterized in that The ring width D2 of the ring base (111) is 1 / 32λ to 1 / 16λ.

13. An electronic device, characterized in that: The electronic device comprises the antenna (1) according to any one of claims 1 to 12.

14. The electronic device according to claim 13, wherein: The electronic device further comprises a metal housing (2), a plastic bracket (3) and a circuit board (4); The plastic bracket (3) is arranged in the metal housing (2), and the antenna (1) is attached to the plastic bracket (3) and electrically connected to the circuit board (4); The metal shell (2) is provided with a through hole (21), and the antenna (1) is located at the through hole (21).

15. The electronic device according to claim 14, characterized in that The electronic device further comprises a decorative part (5), wherein the decorative part (5) is protruding from the metal housing (2) and arranged around the periphery of the through hole (21), so that the antenna (1) is located in a space surrounded by the decorative part (5).

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