CN115051145A

CN115051145A - Antenna and electronic device

Info

Publication number: CN115051145A
Application number: CN202210680875.5A
Authority: CN
Inventors: 漆一宏; 于伟; 朱宇; 肖洋
Original assignee: Leader Technology Hengqin Co ltd
Current assignee: Leader Technology Hengqin Co ltd
Priority date: 2022-06-16
Filing date: 2022-06-16
Publication date: 2022-09-13

Abstract

The invention provides an antenna and electronic equipment, wherein the antenna comprises a metal sheet (100), and the metal sheet (100) is provided with: a first closed slit (10) and a plurality of second slits (20), the first slit (10) including a first hole (11), a second hole (12), and a connecting slit (13) communicating the first hole (11) and the second hole (12), a width of the connecting slit (13) being less than or equal to a minimum width of the first hole (11) and the second hole (12); a first end of the plurality of second slits (20) is closed, and a second end of the plurality of second slits (20) is open at an edge of the metal sheet (100); the second slits (20) are distributed on both sides of the first slit (10). The antenna according to the embodiment of the present invention has the second slot 20 disposed on both sides (upper and lower sides in the drawing) of the first slot, thereby achieving the purpose of widening the bandwidth.

Description

Antenna and electronic device

Technical Field

The invention relates to the technical field of wireless communication, in particular to an antenna and electronic equipment.

Background

Wi-Fi is currently the most prevalent WLAN communication technology. Current Wi-Fi5(802.11ac) technology uses mainly two frequency bands: the 2.4GHz ISM band (2400MHz-2485MHz) and the 5GHz band (5150MHz-5850 MHz). With the continuous progress of the technology, the related technologies of Wi-Fi6 and Wi-Fi6E are gradually applied to the market, and the Wi-Fi newly uses a 6GHz frequency band (5950MHz-7150 MHz). In this case, the antenna originally designed for Wi-Fi5 cannot operate in the new frequency band. Meanwhile, due to the introduction of new characteristics such as MU-User Multiple-Input Multiple-Output (MU-MIMO), and the like, equipment such as a router or a wireless access point needs more and more antennas, the system complexity is higher and higher, and the full-band matched antenna can greatly reduce the system complexity.

Generally speaking, the working frequency bands of the current antenna are three frequency bands of 2.4GHz |5GHz |6GHz, specifically 2.4GHz-2.5GHz, 5.15GHz-5.85GHz and 5.95GHz-7.15 GHz. The antenna in the related art can generally cover matching of only two frequency bands, and due to the limitation of the bandwidth range, it is difficult to realize matching of three frequency bands (three frequency bands of 2.4GHz |5GHz |6 GHz).

The existing Wi-Fi6E antenna application scenes mainly comprise two types, one type is an antenna used on a mobile terminal such as a mobile phone or a notebook computer; another type is an antenna designed for a router or an Access Point (AP). The proposed antenna is designed for a router or AP.

The following two main techniques are available:

(1) an ultra-wideband antenna. The designed antenna is matched from 2.4GHz to 7.15 GHz. The mainstream solution employs a monopole antenna variant fed by microstrip lines or coplanar waveguides (CPW).

(2) The two independent antennas are connected in parallel. The scheme is a mainstream technical scheme, and the designed antenna is formed by connecting two antennas in parallel, so that the matching of a 2.4GHz frequency band and a 5GHz frequency band is realized respectively. This is the case with the common long stick-shaped antennas.

The above-mentioned first type of ultra-wideband antenna is liable to cause a problem of serious distortion of a high-frequency directional pattern due to uncontrolled current distribution, has a general coverage capability, and is liable to cause interference to a circuit. The second Wi-Fi antenna scheme adopts high-low frequency parallel antennas, and the antennas have the advantages of relatively independent high-low frequency radiation, easy design of dual-frequency omnidirectional radiation and strong coverage capability. The main problem is that the high-frequency matching bandwidth is narrow, one high-frequency antenna can only cover 5GHz, more antennas are required to be connected in parallel when the high-frequency antenna is required to be expanded to match a 6GHz frequency band, or the bandwidth is expanded by making the antennas more fat. The antenna needs to be designed comprehensively, the extra parallel antenna has influence on the antenna matching and the directional diagram of the initial form, the size of the antenna is large, and the antenna is not beneficial to being used on equipment with high space requirement, such as: electronic communication equipment such as a small-sized router, a mobile phone and a tablet personal computer.

Disclosure of Invention

The invention mainly solves the problem of matching three frequency bands based on a mode of expanding bandwidth.

The present invention is directed to solving, at least to some extent, one of the technical problems in the related art. Therefore, an embodiment of the present invention provides an antenna, including a metal sheet, where:

a closed first slit, the first slit including a first hole, a second hole, and a connecting slit communicating the first hole and the second hole, the connecting slit having a width less than or equal to a minimum width of the first hole and the second hole; and

a plurality of second slits, a first end of the plurality of second slits being closed, a second end of the plurality of second slits being open at an edge of the metal sheet; the plurality of second slits are distributed on two sides of the first slit.

The antenna according to the embodiment of the present invention has the second slot 20 disposed on both sides (upper and lower sides in the drawing) of the first slot, thereby achieving the purpose of widening the bandwidth.

Optionally, the first aperture has a width that gradually decreases in a direction toward the second aperture, and the second aperture has a width that gradually decreases in a direction toward the first aperture.

Optionally, the shape of the metal sheet is rectangular, and/or the shape of the first and second holes is triangular or arrow-shaped.

Optionally, a plurality of the second slits are symmetrically distributed on two sides of the first slit, and/or the first slit has a symmetrical structure.

Optionally, the first hole includes two first oblique edges that are symmetrically distributed, the two first oblique edges are respectively connected with the first ends of the two side edges of the connecting slit, the second hole includes two second oblique edges that are symmetrically distributed, and the two second oblique edges are respectively connected with the second ends of the two side edges of the connecting slit;

at least a part of two of the second slits extend along the two first oblique sides, respectively, and at least a part of the other two of the second slits extend along the two second oblique sides, respectively.

Optionally, a first end of the second slit faces the connecting slit;

a portion of said second end of said second slit being oriented toward said sheet metal upper edge and a portion of said second end of said second slit being oriented toward said sheet metal lower edge; alternatively, a portion of the second end of the second slit is oriented toward the left edge of the metal sheet and a portion of the second end of the second slit is oriented toward the right edge of the metal sheet.

Optionally, the first hole comprises two symmetrically distributed first parallel sides, and the second hole further comprises two symmetrically distributed second parallel sides;

at least a portion of two of the second slits extend in a direction parallel to two of the first parallel sides, respectively, and at least a portion of the other two of the second slits extend in a direction parallel to two of the second parallel sides, respectively.

Optionally, the second slit is a straight slit, a part of the straight slit is parallel to the first oblique edge, and a part of the straight slit is parallel to the second oblique edge.

Optionally, the second slit comprises a first sub slit and a second sub slit, the first sub slit and the second sub slit form a predetermined angle, and the first sub slit extends toward the connecting slit;

part of the second sub-seam faces the upper edge of the metal sheet, and part of the second sub-seam faces the lower edge of the metal sheet; or, part of the second sub-seam faces the left edge of the metal sheet, and part of the second sub-seam faces the right edge of the metal sheet.

Optionally, the first hole comprises two symmetrically distributed first parallel sides, and the second hole comprises two symmetrically distributed second parallel sides;

the second slit comprises a first sub slit, a second sub slit and a third sub slit which are connected in sequence;

a portion of the first sub-seam extends along the first parallel edge and a corresponding third sub-seam faces a left edge of the metal sheet;

portions of the first sub-slits extend along the second parallel edge, and corresponding third sub-slits are directed toward a right edge of the metal sheet.

Optionally, the second slit is L-shaped, Z-shaped, or S-shaped.

The embodiment of the invention also provides electronic equipment comprising the antenna.

Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the invention and together with the description, serve to explain the principles of the invention.

Fig. 1-9 are schematic diagrams of the antenna structure according to different embodiments of the present invention;

fig. 10 is a model and equivalent circuit diagram of an antenna with a second slot on the left half according to an embodiment of the present invention;

fig. 11 is a graph of S-parameters of different forms of the antenna on a smith chart according to an embodiment of the present invention.

Reference numerals:

100-a metal sheet;

10-first slot; 11-a first hole; 111-a first hypotenuse; 112-a first parallel edge; 12-a second well; 121-a second beveled edge; 122-a second parallel edge; 13-connecting the seam;

20-second slotting; 21-a first sub-seam; 22-a second sub-seam; 23-third sub-seam.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention.

In the antenna according to the present embodiment, the second slot having one open end and the other closed end is provided on each of both sides of the first slot, thereby widening the bandwidth.

Referring to fig. 1-9, the antenna of various embodiments of the present invention is described in detail below.

In some embodiments, the antenna mainly includes the metal sheet 100, and the improvement point of this embodiment also mainly surrounds the specific structure of the metal sheet 100, so other structures of the antenna are not described.

Specifically, the metal sheet 100 has: the first slot 10 and a plurality of second slots 20 that are closed, a plurality of second slots 20 are distributed on both sides of first slot 10. The first slit 10 includes a first hole 11, a second hole 12, and a connecting slit 13 communicating the first hole 11 and the second hole 12, and the width of the connecting slit 13 is less than or equal to the minimum width of the first hole 11 and the second hole 12; here, "width" refers to a distance in the up-down direction as shown in fig. 1 to 9, first ends of the plurality of second slits 20 are closed, and second ends of the plurality of second slits 20 are open at the edge of the metal sheet 100; the second slits 20 are provided on both sides (upper and lower sides in the drawing) of the first slit 10, thereby widening the bandwidth.

In principle, classical center-fed slot antennas have a strict transmission line model. When the narrow slot is expanded into a gradually-changed wide slot, the characteristic impedance of the transmission line is also gradually changed, at the moment, the working bandwidth of the inherent resonance point of the antenna is expanded, but a new resonance point is not added, and the inventor of the application finds that the purpose of expanding the bandwidth can be achieved by forming a new LC resonance. While the electrical size of the antenna is constant, it is still effective to estimate the estimated antenna impedance using an approximate transmission line model. When a slot antenna is generally analyzed by using a transmission line model, the input impedance is obtained by transmission line transformation under the assumption of a short circuit at the tail end. At 6.5GHz, noneThe antenna with the additional second slots 20 has an electrical size of about 2.65 wavelengths, and the antenna exhibits an inductive characteristic as calculated by a transmission line impedance formula. For the sake of derivation, assume that the end region has an inductive Z for a whole virtual impedance _end The antenna is bilaterally symmetric, and a model of the antenna having the second slot 20 on the left half side and an equivalent circuit are shown in fig. 10.

Wherein Z is _end Representing the equivalent impedance, Z, of the section of the strip at the end _os The characteristic impedance of the slot is shown and d represents the length from the current zero to the feed point. The extra circumscribed second slot 20 is equivalent to an open-ended stub of a transmission line connected in parallel to the antenna and having a characteristic impedance of Z _s . The impedance seen at the port at this time is:

from the circuit point of view, the terminal inductive Zend is transformed by the transmission line and then connected in parallel with Zs. To form the LC resonance, Zs needs to exhibit a capacitance, which is easily achieved for the slot capacitance of the transmission line equivalent to less than a quarter wavelength at 6.5GHz, so that the LC resonance can be obtained by simply placing the positions of the slits on both sides of the first slit 10.

Equation (1) can be discussed in three cases. If the connection point of the second slot 20 and the antenna is placed at the position of the current zero point, i.e. d1 is 1/2 λ, then equation (1) can be simplified to

Z _cp ＝Z _end //Z _s (2)

At this time Z _end And Z _s Is in a parallel relationship and just enables LC resonance. If the second slit 20 is placed at the position of the current antinode, i.e. d1 ═ 1/4 λ or d1 ═ 3/4 λ (near the region of red current on the way), then equation (1) can be simplified as:

this time means Z _cp The impedance of (c) is determined by the second slot 20, which is still a first order circuit, and does not serve to spread the bandwidth. The last case is that the gap is placed between the current node and the antinode. This is an intermediate state between the two states, depending on the particular location.

In view of the above, the second slit 20 introduced in the above solution is preferably placed near the current zero position, so that a new LC resonance can be formed at 6.5GHz, thereby improving matching of the 6GHz band.

As can be seen from the transmission line impedance formula, in the 6GHz band, the second slot 20 is equivalent to a stub transmission line exhibiting a capacitive reactance, and the antenna body having the first slot 10 exhibits an inductive reactance, and the two are connected in parallel in the circuit. I.e. the second slot 20 has a reactance that is conjugate to the first slot 10, a new LC resonance point can be formed, thereby widening the bandwidth.

In some embodiments, as shown in fig. 1 and 2, the first aperture 11 has a width that gradually decreases in a direction toward the second aperture 12, and the second aperture 12 has a width that gradually decreases in a direction toward the first aperture 11.

Specifically, in fig. 1, the first hole 11 is triangular and gradually decreases in width from left to right, and the second hole 12 is also triangular and gradually decreases in width from right to left. In fig. 2, the width of the first hole 11 from left to right is constant and then gradually decreases, and the width of the second hole 12 from right to left is constant and then gradually decreases.

The first hole 11 and the second hole 12 may be symmetrically disposed, and the shapes of the first hole 11 and the second hole 12 may be a triangle, a trapezoid, a boss, an arrow, etc. The width of the connecting slit 13 is in the range of 1-4mm, although the present application is not limited to this range, and a person skilled in the art can select a suitable width as needed.

In some embodiments, the metal sheet 100 has a rectangular shape, and the metal sheet 100 may be bent or not bent as needed when manufacturing the antenna, and the first hole 11 and the second hole 12 have a triangular shape or an arrow shape (fig. 3, 4, 5, and 6).

In some embodiments, the plurality of second slits 20 are symmetrically distributed on two sides of the first slit 10, that is, the number of the second slits 20 on two sides of the first slit 10 is equal and corresponds to one another, and each pair of two corresponding second slits 20 are symmetrical to each other.

Further, the first slit 10 has a symmetrical structure, and specifically, the first hole 11, the second hole 12, and the connecting slit 13 are symmetrical in the vertical direction, may be symmetrical in the horizontal direction, or may be symmetrical in both the vertical direction and the horizontal direction.

In some embodiments, the first hole 11 includes two first oblique sides 111 symmetrically distributed, the two first oblique sides 111 are respectively connected to first ends of two side edges 131 connecting the slit 13, the second hole 12 includes two second oblique sides 121 symmetrically distributed, the two second oblique sides 121 are respectively connected to second ends of two side edges 131 connecting the slit 13;

at least a portion of two second slits 20 extend along the two first oblique sides 111, respectively, and at least a portion of the other two second slits 20 extend along the two second oblique sides 121, respectively.

In some embodiments, a first end of second slit 20 is toward connecting slit 13; referring to fig. 4 and 5, a second end of a portion of the second slits 20 faces the upper edge of the metal sheet 100, and a second end of a portion of the second slits 20 faces the lower edge of the metal sheet 100;

referring to fig. 2 and 3, the second end of a portion of the second slit 20 is directed toward the left edge of the metal sheet 100, and the second end of a portion of the second slit 20 is directed toward the right edge of the metal sheet 100.

In some embodiments, the first aperture 11 comprises two symmetrically distributed first parallel sides 112, the second aperture 12 further comprises two symmetrically distributed second parallel sides 122; at least a portion of two second slits 20 extend in a direction parallel to the two first parallel edges 112, respectively, a portion of the second slits 20 may be parallel to the first parallel edges 112, and at least a portion of the other two second slits 20 extend in a direction parallel to the two second parallel edges 122, respectively.

Specifically, the second slit 20 includes a first sub slit 21 and a second sub slit 22, the first sub slit 21 may be parallel to the first oblique side 111, the other first sub slits 21 may be parallel to the second oblique side 121, and the second sub slit 22 is parallel to the first parallel side 112 and the second parallel side 122.

In some embodiments, as shown in fig. 1, second slit 20 is a straight slit, with a portion of the straight slit being parallel to first angled edge 111 and a portion of the straight slit being parallel to second angled edge 121. Second slits 20 may be parallel to or form an acute angle with corresponding first oblique sides 111, which may range from 0-30 °.

In some embodiments, as shown in fig. 3, 4 and 7, the second slit 20 includes a first sub-slit 21 and a second sub-slit 22, the first sub-slit 21 and the second sub-slit 22 forming a predetermined angle, and the predetermined angle may range from 80 ° to 150 °. Wherein the first sub-slit 21 extends toward the connecting slit 13; part of the second sub-slits 22 faces the upper edge of the metal sheet 100, and part of the second sub-slits 22 faces the lower edge of the metal sheet 100; alternatively, a portion of the second sub-slit 22 faces the left edge of the metal sheet 100, and a portion of the second sub-slit 22 faces the right edge of the metal sheet 100.

In some embodiments, the first aperture 11 includes two symmetrically distributed first parallel sides 112, and the second aperture 12 includes two symmetrically distributed second parallel sides 122; the first parallel edge 112 and the first oblique edge 111 may be directly connected or may be connected by other edges, and the second parallel edge 122 and the second oblique edge 121 may be directly connected or may be connected by other edges.

As shown in fig. 2, the second slit 20 includes a first sub-slit 21, a second sub-slit 22 and a third sub-slit 23 connected in sequence; part of the first sub-slits 21 extend along the first parallel edge 112, and the corresponding third sub-slits 23 face the left edge of the metal sheet 100; a portion of the first sub-slits 21 extends along the second parallel edge 122 and the corresponding third sub-slits 23 are directed towards the right edge of the metal sheet 100.

In some embodiments, second slit 20 is L-shaped, Z-shaped, or S-shaped. As shown in fig. 6, the extending path of the second slit 20 may also partially extend along the contour line of the corresponding first hole 11 or second hole 12.

Referring to fig. 7, each of the four second slits 20 is L-shaped, and one side thereof is parallel to the first parallel side 112.

Referring to fig. 8, the second slits 20 may be formed on the left and right sides of the first slit 10, and the four second slits 20 are all linear slits. Referring to fig. 9, the plurality of second slits 20 may be asymmetrically disposed, and the first slits 10 may be vertically symmetrical but not horizontally symmetrical.

Referring to fig. 11, which is a schematic diagram of S parameters of different forms of the antenna in an embodiment, which is a smith chart, a curve corresponding to the antenna with the added slot is wrapped by one more circle than a curve without the added slot to indicate that a new resonance point is formed. As can be seen from the smith chart, the newly introduced slot structure forms a new resonance point around 6.5GHz, which covers (resonance point) frequencies from 5.3GHz to 7.12GHz ", i.e. marked by an arrow (5.3GHz to 7.12 GHz). The curve added with the feed network is the S parameter curve of the final antenna state. The technical effect of the above scheme can be directly reflected by the figure, and it can be seen that the bandwidth of the antenna is obviously widened after the second slot 20 is additionally arranged.

The present embodiment further provides an electronic device, including the antenna according to any of the above embodiments, where the electronic device may be a router, a mobile phone, a tablet computer, or other electronic devices with a communication function.

In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the invention and to simplify the description, but are not intended to indicate or imply that the device or element so referred to must have a particular orientation, be constructed in a particular orientation, and be operated in a particular manner, and are not to be construed as limiting the invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; may be mechanically coupled, may be electrically coupled or may be in communication with each other; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In the present invention, unless otherwise expressly stated or limited, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through an intermediate. Also, a first feature "on," "above," and "over" a second feature may be directly on or obliquely above the second feature, or simply mean that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

In the present disclosure, the terms "one embodiment," "some embodiments," "example," "specific example," or "some examples" and the like mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present disclosure. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.

Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art within the scope of the present invention.

Claims

1. The antenna is characterized by comprising a metal sheet (100), wherein the metal sheet (100) is provided with:

a first closed slit (10), the first slit (10) including a first hole (11), a second hole (12), and a connecting slit (13) communicating the first hole (11) and the second hole (12), a width of the connecting slit (13) being less than or equal to a minimum width of the first hole (11) and the second hole (12); and

a plurality of second slits (20), a first end of the plurality of second slits (20) being closed, a second end of the plurality of second slits (20) being open at an edge of the metal sheet (100); the second slits (20) are distributed on both sides of the first slit (10).

2. An antenna according to claim 1, characterized in that the width of the first hole (11) in the direction towards the second hole (12) is gradually decreasing and the width of the second hole (12) in the direction towards the first hole (11) is gradually decreasing.

3. An antenna according to claim 2, characterized in that the shape of the metal sheet (100) is rectangular and/or the shape of the first hole (11) and the second hole (12) is triangular or arrow shaped.

4. An antenna according to any of claims 1-3, characterized in that a plurality of said second slots (20) are symmetrically distributed on both sides of said first slot (10) and/or that said first slot (10) is of a symmetrical structure.

5. An antenna according to any of claims 1-3, characterized in that said first hole (11) comprises two first oblique sides (111) symmetrically distributed, said two first oblique sides (111) being connected to a first end of two sides (131) of said connecting slot (13), respectively, and said second hole (12) comprises two second oblique sides (121) symmetrically distributed, said two second oblique sides (121) being connected to a second end of two sides (131) of said connecting slot (13), respectively;

at least a part of two of the second slits (20) extends along two of the first oblique sides (111), respectively, and at least a part of the other two of the second slits (20) extends along two of the second oblique sides (121), respectively.

6. An antenna according to any of claims 5, characterized in that the first end of the second slot (20) is directed towards the connecting slot (13);

a part of the second end of the second slit (20) is directed towards the upper edge of the metal sheet (100), and a part of the second end of the second slit (20) is directed towards the lower edge of the metal sheet (100); or the second end of part of the second seam (20) faces the left edge of the metal sheet (100), and the second end of part of the second seam (20) faces the right edge of the metal sheet (100).

7. The antenna according to claim 5, characterized in that said first aperture (11) comprises two symmetrically distributed first parallel edges (112), said second aperture (12) further comprises two symmetrically distributed second parallel edges (122);

at least a portion of two of the second slits (20) extend in a direction parallel to two of the first parallel edges (112), respectively, and at least a portion of the other two of the second slits (20) extend in a direction parallel to two of the second parallel edges (122), respectively.

8. An antenna according to claim 5, characterized in that said second slot (20) is a straight slot, part of said straight slot being parallel to said first oblique edge (111) and part of said straight slot being parallel to said second oblique edge (121).

9. The antenna according to claim 5, wherein the second slot (20) comprises a first sub slot (21) and a second sub slot (22), the first sub slot (21) and the second sub slot (22) forming a predetermined angle, the first sub slot (21) extending toward the connecting slot (13);

part of the second sub-slit (22) is towards the upper edge of the metal sheet (100), and part of the second sub-slit (22) is towards the lower edge of the metal sheet (100); or, part of the second sub-seam (22) faces the left edge of the metal sheet (100), and part of the second sub-seam (22) faces the right edge of the metal sheet (100).

10. The antenna according to claim 1, characterized in that said first aperture (11) comprises two symmetrically distributed first parallel sides (112) and said second aperture (12) comprises two symmetrically distributed second parallel sides (122);

the second slit (20) comprises a first sub slit (21), a second sub slit (22) and a third sub slit (23) which are connected in sequence;

-a portion of said first sub-slit (21) extends along said first parallel edge (112) and a corresponding third sub-slit (23) is directed towards a left edge of said metal sheet (100);

part of the first sub-slits (21) extend along the second parallel edge (122) and the corresponding third sub-slits (23) are directed towards the right edge of the metal sheet (100).

11. The antenna of claim 1, wherein the second slot (20) is L-shaped, Z-shaped, or S-shaped.

12. An electronic device, characterized in that it comprises an antenna according to any of claims 1-11.