A slot antenna and electronic device

Abstract

A kind of slot antenna and electronic equipment, by setting slot (121) as radiation source in the ground plane of first circuit board (120), first circuit board (120) can be directly laminated to the inside of the shell (110) of electronic equipment, without setting clearance area for antenna, it is beneficial to the design of electronic equipment in thickness appearance.By setting wireless feed line (122) and radio frequency module (132) on first circuit board (120) and second circuit board (130) respectively, which are at preset included angle, it is beneficial to electronic equipment to realize narrow frame.

Description

Technical Field

[0001] This invention relates to the field of antenna technology, and more particularly to a slot antenna and electronic device. Background Technology

[0002] With the development of wireless networks, electronic devices with displays, such as televisions and interactive intelligent panels, are connected to the network via antennas.

[0003] like Figure 1 As shown, a traditional antenna consists of an antenna module located within the circuitry area of ​​the electronic device. This antenna module is connected to an antenna, which radiates and receives wireless signals. During the design process, to avoid interference from the internal circuitry area that could lead to low antenna radiation efficiency, metal cannot be placed on the upper or lower layers of the area where the antenna is located on the circuit board. This is to provide the necessary clearance for antenna radiation. This clearance requirement limits the freedom of design in terms of the external structure and is detrimental to the design of the electronic device's thickness and other aesthetic aspects. Summary of the Invention

[0004] This invention provides a slot antenna and electronic device that can optimize the design of electronic devices in terms of thickness and appearance, which is beneficial for achieving narrow bezels in electronic devices.

[0005] In a first aspect, the present invention provides a slot antenna, comprising:

[0006] A first circuit board is stacked inside the housing of an electronic device. A ground plane is provided on the side of the first circuit board near the housing, and a gap is provided on the ground plane. An antenna feed line is provided on the side of the first circuit board away from the housing. The antenna feed line is connected across the narrow side of the gap, and the first end of the antenna feed line is connected to the ground plane.

[0007] The second circuit board is disposed within the housing of the electronic device at a preset angle to the first circuit board. The second circuit board is provided with a radio frequency transmission line and a radio frequency module. The first end of the radio frequency transmission line is connected to the radio frequency module, and the second end of the radio frequency transmission line is connected to the second end of the antenna feed line.

[0008] In a second aspect, the present invention also provides an electronic device including the slot antenna provided in the first aspect of the present invention.

[0009] The slot antenna provided by this invention includes: a first circuit board and a second circuit board. The first circuit board is stacked inside the casing of an electronic device. A ground plane is provided on the side of the first circuit board near the casing, and a slot is formed in the ground plane. An antenna feed line is provided on the side of the first circuit board away from the casing, and the antenna feed line crosses the narrow side of the slot. The first end of the antenna feed line is connected to the ground plane. The second circuit board is disposed inside the casing of the electronic device at a predetermined angle to the first circuit board. The second circuit board is provided with a radio frequency transmission line and a radio frequency module. The first end of the radio frequency transmission line is connected to the radio frequency module, and the second end of the radio frequency transmission line is connected to the second end of the antenna feed line. In this embodiment of the invention, by setting a slot in the ground plane of the first circuit board as a radiation source, the first circuit board can be directly stacked inside the casing of the electronic device without needing to set a clearance area for the antenna, which is beneficial for the design of the electronic device in terms of thickness and appearance. By setting the antenna feed line and the radio frequency module on the first circuit board and the second circuit board at a predetermined angle, it is beneficial for the electronic device to achieve a narrow bezel.

[0010] It should be understood that the description in this section is not intended to identify key or essential features of the invention, nor is it intended to limit the scope of the invention. Other features of the invention will become readily apparent from the following description. Attached Figure Description

[0011] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0012] Figure 1 This is a schematic diagram of the structure of an antenna;

[0013] Figure 2 This is a schematic diagram of the structure of a slot antenna provided in an embodiment of the present invention;

[0014] Figure 3 A schematic diagram of a gap structure provided in an embodiment of the present invention;

[0015] Figure 4 Figure 2 A partial enlarged view of the connection point between the first and second circuit boards;

[0016] Figure 5 A schematic diagram of the structure of a connector provided in an embodiment of the present invention;

[0017] Figure 6 An exploded view of a slot antenna provided in an embodiment of the present invention;

[0018] Figure 7 The return loss diagram of the slot antenna provided in the embodiment of the present invention. Detailed Implementation

[0019] To make the technical problems solved by the present invention, the technical solutions adopted, and the technical effects achieved clearer, the technical solutions of the embodiments of the present invention will be further described in detail below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0020] In the description of this invention, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0021] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature being directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature being directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature. Moreover, the terms "first" and "second" are used merely for descriptive distinction and have no specific meaning.

[0022] Figure 2 This is a schematic diagram of a slot antenna provided in an embodiment of the present invention, as shown below. Figure 2 As shown, the slot antenna includes: a first circuit board 120 and a second circuit board 130.

[0023] The first circuit board 120 is stacked inside the housing 110 of the electronic device. For example, the housing 110 can be a side frame, bottom frame, or top frame of the electronic device; this embodiment of the invention is not limited thereto. It should be noted that, for ease of explanation, Figure 2Only one of the edges of the electronic device is shown; the other edges are not shown. For example, the first circuit board 120 can be stacked inside the housing 110 by means of adhesive bonding, screw fixing, or other methods. In this embodiment, "inner side" refers to the side facing the interior of the electronic device.

[0024] A grounding plane, which is a grounded metal layer, is provided on the side of the first circuit board 120 near the outer casing 110. A gap 121 is provided on the grounding plane. An antenna feed line 122 is provided on the side of the first circuit board 120 away from the outer casing 110. The antenna feed line 122 crosses the narrow side of the gap 121, that is, the antenna feed line 122 spans the gap 121. The first end of the antenna feed line 122 is connected to the grounding plane. Exemplarily, the first end of the antenna feed line 122 can extend along the sidewall of the first circuit board 120 to the side of the first circuit board 120 near the metal casing 110 and connect to the grounding plane on the side near the metal casing 110. Alternatively, a metal hole can be provided on the first circuit board 120, through which the first end of the antenna feed line 122 can extend to the side of the first circuit board 120 near the metal casing 110 and connect to the grounding plane on the side near the metal casing 110. This embodiment of the invention is not limited here.

[0025] In this embodiment of the invention, the slit 121 can be an elongated slit, and its shape can be rectangular, elliptical, or other shapes. In other embodiments of the invention, branches can also be provided in the slit 121 to increase new frequency resonances and expand the bandwidth; however, this embodiment of the invention does not limit the scope of the invention.

[0026] The second circuit board 130 is disposed within the electronic device at a preset angle to the first circuit board 120. For example, in a specific embodiment of the present invention, the preset angle can be 90°. In other embodiments of the present invention, the preset angle can be set according to the internal space and structural layout of the electronic device; this embodiment of the present invention does not impose any limitations on this. The second circuit board 130 is provided with a radio frequency transmission line 131 and a radio frequency module 132. The first end of the radio frequency transmission line 131 is connected to the radio frequency module 132, and the second end of the radio frequency transmission line 131 is connected to the second end of the antenna feed line 122.

[0027] The radio frequency module 132 can transmit electrical signals through the radio frequency transmission line 131 and the antenna feed line 122 to the feed point between the antenna feed line 122 and the ground plane. The antenna feed line 122 is connected across the narrow side of the slot 121 to feed the slot antenna. At this time, a radio frequency electromagnetic field is excited on the slot 121 and electromagnetic waves are radiated into space. Exemplarily, in one specific embodiment of the present invention, the outer shell 110 is a non-metallic shell (e.g., plastic), which does not shield or block the radiation generated by the antenna. The radiation of the slot antenna is generated by the edge field between the edge of the antenna feed line 122 and the ground plane and radiated out through the slot 121. Exemplarily, in one specific embodiment of the present invention, the outer shell 110 can be a metallic shell. Since the metallic shell shields or blocks the radiation generated by the antenna, a slot also needs to be provided on the outer shell 110 at the position corresponding to the slot 121. This slot can be sealed with plastic to avoid a decrease in the airtightness of the electronic device. The radiation of the slot antenna is generated by the edge field between the edge of the antenna feed line 122 and the ground plane, and is radiated out through the slot 121 and the slot on the housing 110.

[0028] In this embodiment of the invention, by setting a gap 121 on the ground plane of the first circuit board 120 as a radiation source, the first circuit board 120 can be directly stacked on the inner side of the outer shell 110 of the electronic device, without the need to set a clearance area for the antenna, which is beneficial to the design of the electronic device in terms of thickness and appearance. By setting the antenna feed line 122 and the radio frequency module 132 on the first circuit board 120 and the second circuit board 130 at a preset angle, the problem of setting the antenna feed line 122 and the radio frequency module 132 on the same circuit board, resulting in a larger circuit board size and a larger bezel size for the outer shell of the stacked circuit boards, is avoided, which is beneficial to achieving a narrow bezel in the electronic device.

[0029] The slot antenna provided by this invention includes: a first circuit board and a second circuit board. The first circuit board is stacked inside the housing of an electronic device. A ground plane is provided on the side of the first circuit board near the housing, and a slot is formed in the ground plane. An antenna feed line is provided on the side of the first circuit board away from the housing, and the antenna feed line crosses the narrow side of the slot. The first end of the antenna feed line is connected to the ground plane. The second circuit board is disposed inside the housing of the electronic device at a predetermined angle to the first circuit board. The second circuit board is provided with a radio frequency transmission line and a radio frequency module. The first end of the radio frequency transmission line is connected to the radio frequency module, and the second end of the radio frequency transmission line is connected to the second end of the antenna feed line. In this embodiment of the invention, by setting a slot in the ground plane of the first circuit board as a radiation source, the first circuit board can be directly stacked inside the housing of the electronic device without needing to set a clearance area for the antenna, which is beneficial for the design of the thickness and appearance of the electronic device. By setting the antenna feed line and the radio frequency module on the first circuit board and the second circuit board at a predetermined angle, the problem of setting the antenna feed line and the radio frequency module on the same circuit board, which would result in a larger circuit board size and a larger bezel size for the housing of the stacked circuit boards, is avoided, which is beneficial for achieving a narrow bezel in the electronic device.

[0030] Figure 3 A schematic diagram of a gap structure provided in an embodiment of the present invention, such as... Figure 3 As shown, the slit 121 is elongated, and an "L"-shaped branch 126 is disposed within the slit 121. One end of the branch 126 is connected to the grounding plane 127, and the other end extends into the slit 121. Exemplarily, the branch 126 and the grounding plane 127 are integrally formed, and the branch 126 extends from the narrow side of the slit 121 into the slit 121. The branch 126 can change the antenna's radiation frequency and expand its bandwidth. In other embodiments of the present invention, the form and number of branches are not limited.

[0031] Figure 4 Figure 2 A partial enlarged view of the connection between the first and second circuit boards, as shown below. Figure 2 and Figure 4 As shown, a connector 141 is provided at the connection between the first circuit board 120 and the second circuit board 130, and the antenna feed line 122 and the radio frequency transmission line 131 are electrically connected through the connector 141.

[0032] Exemplary examples, in some embodiments of the invention, connector 141 may be a very short coaxial cable. A coaxial cable is a broadband microwave transmission line consisting of two coaxial cylindrical conductors, with air or a high-frequency dielectric filled between the inner and outer cylindrical conductors. In other embodiments of the invention, connector 141 may also be other forms of connectors, such as subminiature push-on (SMP) connectors, metal springs, or metal pins, which are not limited herein. Subminiature push-on (SMP) connectors are highly shielded, very small interconnects, typically used in miniaturized high-frequency coaxial modules and high-data-rate applications, such as antennas, broadband installations, test and measurement, and quantum computing. Subminiature push-on connectors are named for their ease of use: installers simply push these plug-in connectors together to make connections.

[0033] The use of coaxial cables increases the loss of the radio frequency system and is detrimental to antenna assembly and certification. To address this issue, in some embodiments of the present invention, the connector includes a first component and a second component that are interconnected; the connector is disposed on a first circuit board, the first component is connected to the antenna feed line, and the second component abuts against the radio frequency transmission line; or, the connector is disposed on a second circuit board, the first component is connected to the radio frequency transmission line, and the second component abuts against the antenna feed line.

[0034] Figure 5 A schematic diagram of the structure of a connector provided in an embodiment of the present invention is exemplary, such as... Figure 5 As shown, in this embodiment of the invention, connector 141 includes a first component 1411 and a second component 1412 that are interconnected. Connector 141 is disposed on a first circuit board 120. The first component 1411 is connected to the antenna feed line 122. For example, the first component 1411 is soldered to the antenna feed line 122, or the first component 1411 is fixed to the antenna feed line 122 with conductive adhesive. The second component 1412 abuts against the radio frequency transmission line 131, thereby realizing the electrical connection between the antenna feed line 122 and the radio frequency transmission line 131.

[0035] In some embodiments of the present invention, such as Figure 4 , 5 As shown, the first component 1411 is generally cuboid in shape and has an overlapping surface (i.e., the surface that contacts the antenna feed line 122). The overlapping surface can be fixed or welded to the antenna feed line 122 with conductive adhesive.

[0036] In some embodiments of the present invention, such as Figure 4 , 5 As shown, in order to reduce the weight of connector 141 and thus make the electronic device lighter, the first component 1411 has a hollow structure.

[0037] In some embodiments of the present invention, to enhance the electrical connection stability between the connector and the radio frequency transmission line, the second component can be a metal spring or a metal pin. The metal spring or metal pin has a certain degree of elasticity and can stably abut against the radio frequency transmission line, preventing open circuits caused by the shaking of the first or second circuit board. For example, in some embodiments of the present invention, such as... Figure 4 , 5 As shown, the second component 1412 is a metal spring.

[0038] In some embodiments of the present invention, the first component 1411 and the second component 1412 of the connector 141 may be integrally formed, and the material may be conductive metals such as copper and silver.

[0039] In some embodiments of the present invention, the antenna feed line 122 and the radio frequency transmission line 131 may be microstrip lines. A microstrip line is a microwave transmission line consisting of a single conductor strip supported on a dielectric substrate, with a ground plane formed on the other side of the substrate. Microstrip lines are suitable for fabricating planar transmission lines for microwave integrated circuits. Compared with metal waveguides, they are smaller in size, lighter in weight, have a wider operating bandwidth, higher reliability, and lower manufacturing cost.

[0040] In some embodiments of the present invention, such as Figure 4 As shown, the antenna feed line 122 and the RF transmission line 131 can be coplanar waveguides. The first circuit board 120 also has two ground planes 123 and 124 coplanar with the antenna feed line 122. These two ground planes 123 and 124 are respectively located on both sides of the antenna feed line 122 and are insulated from it, forming a coplanar waveguide. Similarly, the second circuit board 130 also has two ground planes 133 and 134 coplanar with the RF transmission line 131. These two ground planes 133 and 134 are respectively located on both sides of the RF transmission line 131 and are insulated from it, forming a coplanar waveguide. Compared to microstrip lines, coplanar waveguides have lower signal transmission loss and dispersion, are easier to manufacture, and facilitate the series and parallel connection of passive and active devices in microwave circuits (without needing vias on the substrate), thus easily increasing circuit density.

[0041] In some embodiments of the present invention, such as Figure 4As shown, at least three connectors, denoted as 141, 142, and 143, are provided at the connection point between the first circuit board 120 and the second circuit board 130. The antenna feed line 122 and the radio frequency transmission line 131 are electrically connected through the first connector 141. The ground plane 123 on the first side of the antenna feed line 122 and the ground plane 133 on the first side of the radio frequency transmission line 131 are electrically connected through the second connector 142. The ground plane 124 on the second side of the antenna feed line 122 and the ground plane 134 on the second side of the radio frequency transmission line 131 are electrically connected through the third connector 143. The structure and connection principle of connectors 142 and 143 are similar to those of connector 141, as detailed in the foregoing embodiments, and will not be repeated here.

[0042] In some embodiments of the present invention, a first circuit board 120 is stacked and fixedly disposed on the inner side of the first sidewall of the housing 110, and a second circuit board 130 is stacked and fixedly disposed on the inner side of the second sidewall of the housing 110, wherein the first sidewall and the second sidewall are two adjacent sidewalls. Thus, the second circuit board 130 does not require other fixing structures and is directly stacked on the inner side of the second sidewall of the metal housing 110, saving material costs.

[0043] In some embodiments of the present invention, due to limitations in the size and structure of the housing 110, the second circuit board 130 may not be able to be stacked on the other side wall of the housing 110, requiring additional brackets for fixing the second circuit board 130. Figure 6 An exploded view of a slot antenna provided in an embodiment of the present invention, as shown below. Figure 6 As shown, a first circuit board 120 is stacked and fixedly disposed on the inner side of one side wall of the housing, and a second circuit board 130 is fixed on a bracket 150. The bracket 150 is used to fix the second circuit board 130, so that the relative positions of the first circuit board 120 and the second circuit board 130 are fixed, preventing relative movement between them from causing a break in the antenna feed line and the radio frequency transmission line. Exemplarily, in some embodiments of the present invention, the bracket 150 is fixed to the first circuit board 120 to achieve self-fixation, and the second circuit board 130 is fixed to the bracket 150. In other embodiments of the present invention, the bracket may be fixed to the inner side of one side wall of the housing to achieve self-fixation, and the second circuit board 130 is fixed to the bracket 150.

[0044] In some embodiments of the present invention, such as Figure 6 As shown, the bracket 150 includes a connecting part 151 and a fixing part 152. The connecting part 151 is fixedly connected to the side of the first circuit board 120 away from the outer casing, and the second circuit board 130 is fixed on the fixing part 152.

[0045] In some embodiments of the present invention, such as Figure 6As shown, the connecting part 151 is provided with a positioning hole 1511, and adhesive is provided around the positioning hole 1511. A protruding positioning member 125 is provided on the side of the first circuit board 120 away from the outer casing, corresponding to the positioning hole 1511. The positioning member 125 passes through the positioning hole 1511. The connecting part 151 is fixed to the first circuit board 120 by the adhesive, thereby fixing the bracket 150 itself. The positioning member 125, in conjunction with the positioning hole 1511, fixes the relative position of the bracket 150 and the first circuit board 120. In other embodiments of the present invention, other fixing methods can also be used to fix the relative position of the bracket 150 and the first circuit board 120; these embodiments are not limited here. In these embodiments, the shape, size, and number of the positioning holes 1511 are not limited.

[0046] For example, in some embodiments of the present invention, the fixing part 152 is fixed to the inner side of one side wall of the housing by a fastener, thereby fixing the bracket 150 itself. The fastener may include locking screws, clips, etc., and is not limited to this embodiment. The fixing part 152 is provided with a plurality of internally threaded studs, and the second circuit board 130 is provided with fixing holes that match the internally threaded studs. The fixing part 152 and the second circuit board 130 are fixed in position by passing screws through the fixing holes and screwing them into the internally threaded studs. Of course, in other embodiments of the present invention, other fixing methods may also be used to fix the fixing part 152 and the second circuit board 130 in position, and are not limited to this embodiment.

[0047] In some embodiments of the present invention, multiple antenna feed lines 122 may be configured on the first circuit board 120, and multiple slots 121 corresponding one-to-one with the antenna feed lines 122 may be configured on the ground plane of the first circuit board 120, thereby forming multiple slot antennas. The multiple slot antennas can work simultaneously or in a time-division manner. The embodiments of the present invention are not limited here.

[0048] In some embodiments of the present invention, in order to shield the signal interference of other devices of the electronic device to the slot antenna, a metal shielding cover is also provided on the first circuit board 120. The metal shielding cover covers the slot 121, that is, the slot 121 is covered inside the metal shielding cover to improve signal accuracy.

[0049] In some embodiments of the present invention, the metal shielding cover is reused as the positioning element 125, that is, the positioning element 125 is a hollow shielding cover. This embodiment of the present invention reuses the metal shielding cover as the positioning element 125, saving material costs and facilitating the lightweighting of electronic devices.

[0050] In some embodiments of the present invention, the radio frequency module is a wireless access point (AP) radio frequency module, which can provide wireless access services, enabling electronic devices to become creators of wireless networks, acting as the central node of the network, allowing other wireless devices to access and providing data access. The antenna connected to the AP radio frequency module is the AP antenna.

[0051] In some embodiments of the present invention, the electronic device further includes a Station (STA) radio frequency module and a Station antenna (STA antenna), which are connected and both disposed on a second circuit board. An STA station is any terminal connected to a wireless network (such as a laptop, PDA, or other network-connected user equipment). An STA station itself does not accept wireless access; it can connect to a wireless access point.

[0052] This invention allows the electronic device to switch between AP and STA modes by simultaneously equipping it with both AP and STA antennas, facilitating device control and connection to other devices.

[0053] In some embodiments of the present invention, the radio frequency module includes multiple radio frequency devices, which are integrated on a second circuit board, improving the integration of the electronic device and facilitating its miniaturization. In other embodiments of the present invention, the radio frequency module can be divided into multiple radio frequency devices, arranged on the second circuit board along the extension direction of the radio frequency transmission line, thereby shortening the width of the second circuit board (the width perpendicular to the direction of the radio frequency transmission line), avoiding the problem of a wide second circuit board leading to a wide bezel of the electronic device, and facilitating the achievement of a narrow bezel in the electronic device.

[0054] In some embodiments of the present invention, the slot antenna is an AiP (Antenna in Package) packaged antenna.

[0055] Figure 7 The return loss diagram of the slot antenna provided in the embodiment of the present invention is as follows: Figure 7 As shown, this invention performs return loss simulation tests on two slot antennas in the 5GHz band. The signal frequency band with a return loss of less than 5dB for one slot antenna is mainly concentrated between 4.96GHz and 6.07GHz, and the signal frequency band with a return loss of less than 5dB for the other slot antenna is mainly concentrated between 4.96GHz and 6.08GHz. Both have very low return loss rates.

[0056] This invention also provides an electronic device, which includes at least one slot antenna provided in any of the foregoing embodiments of this invention. The electronic device may be an interactive smart flat panel, a smartphone, a tablet computer, an electronic whiteboard, a smart TV, etc., and this invention does not limit the scope of the application.

[0057] In the description herein, it should be understood that the terms "upper," "lower," "left," "right," etc., are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of description and simplification of operation, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention.

[0058] In the description of this specification, references to terms such as "an embodiment," "example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, illustrative expressions of the above terms do not necessarily refer to the same embodiment or example.

[0059] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style of the specification is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

[0060] The technical principles of the present invention have been described above with reference to specific embodiments. These descriptions are merely for explaining the principles of the invention and should not be construed as limiting the scope of protection of the invention in any way. Based on this explanation, those skilled in the art can readily conceive of other specific embodiments of the invention without inventive effort, and these embodiments will all fall within the scope of protection of the present invention.

Claims

1. A slot antenna, characterized in that, include: A first circuit board is stacked inside the housing of an electronic device. A ground plane is provided on the side of the first circuit board near the housing, and a gap is provided on the ground plane. An antenna feed line is provided on the side of the first circuit board away from the housing. The antenna feed line is connected across the narrow side of the gap, and the first end of the antenna feed line is connected to the ground plane. The second circuit board is disposed within the housing of the electronic device at a preset angle to the first circuit board. The second circuit board is provided with a radio frequency transmission line and a radio frequency module. The first end of the radio frequency transmission line is connected to the radio frequency module, and the second end of the radio frequency transmission line is connected to the second end of the antenna feed line.

2. The slot antenna according to claim 1, characterized in that, A branch is provided in the gap, one end of which is connected to the grounding plane and the other end extends into the gap.

3. The slot antenna according to claim 1, characterized in that, A connector is provided at the connection between the first circuit board and the second circuit board, and the antenna feed line is connected to the radio frequency transmission line through the connector.

4. The slot antenna according to claim 3, characterized in that, The connector is a coaxial cable, an ultra-small push-in connector, a metal spring, or a metal pin.

5. The slot antenna according to claim 3, characterized in that, The connector includes a first component and a second component that are interconnected. The connector is disposed on the first circuit board, the first component is connected to the antenna feed line, and the second component abuts against the radio frequency transmission line; or... The connector is disposed on the second circuit board, the first component is connected to the radio frequency transmission line, and the second component abuts against the antenna feed line.

6. The slot antenna according to any one of claims 3-5, characterized in that, The radio frequency transmission line is a coplanar waveguide. The first circuit board is also provided with two ground planes coplanar with the antenna feed line. The two ground planes are respectively located on both sides of the antenna feed line and are insulated from the antenna feed line. The second circuit board is also provided with two ground planes coplanar with the radio frequency transmission line. The two ground planes are respectively located on both sides of the radio frequency transmission line and are insulated from the radio frequency transmission line.

7. The slot antenna according to claim 6, characterized in that, At least three connectors are provided at the connection between the first circuit board and the second circuit board. The antenna feed line is connected to the radio frequency transmission line through the first connector. The ground plane on the first side of the antenna feed line is connected to the ground plane on the first side of the radio frequency transmission line through the second connector. The ground plane on the second side of the antenna feed line is connected to the ground plane on the second side of the radio frequency transmission line through the third connector.

8. The slot antenna according to any one of claims 1-5, characterized in that, The first circuit board is stacked and fixedly disposed on the inner side of the first side wall of the housing, and the second circuit board is stacked and fixedly disposed on the inner side of the second side wall of the housing. The first side wall and the second side wall are two adjacent side walls.

9. The slot antenna according to any one of claims 1-5, characterized in that, The first circuit board is stacked and fixedly disposed on the inner side of one of the side walls of the housing, and the second circuit board is fixed on a bracket.

10. The slot antenna according to claim 9, characterized in that, The bracket includes a connecting part and a fixing part. The connecting part is fixedly connected to the side of the first circuit board away from the housing, and the second circuit board is fixed to the fixing part.

11. The slot antenna according to claim 10, characterized in that, The connecting part is provided with a positioning hole, and adhesive is provided around the positioning hole. A protruding positioning member is provided on the side of the first circuit board away from the outer shell corresponding to the positioning hole. The connecting part is fixed to the first circuit board by the adhesive, and the positioning member passes through the positioning hole.

12. The slot antenna according to claim 11, characterized in that, The first circuit board is also provided with a metal shielding cover, which covers the gap.

13. The slot antenna according to claim 12, characterized in that, The metal shielding cover is reused as the positioning element.

14. The slot antenna according to any one of claims 1-5, characterized in that, The radio frequency module is a wireless access point radio frequency module.

15. The slot antenna according to any one of claims 1-5, characterized in that, The radio frequency module includes multiple radio frequency devices, which are integrated on the second circuit board or arranged on the second circuit board along the extension direction of the radio frequency transmission line.

16. An electronic device, characterized in that, Includes the slot antenna as described in any one of claims 1-15.

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