WO2024065281A1

WO2024065281A1 - Slot antenna and electronic device

Info

Publication number: WO2024065281A1
Application number: PCT/CN2022/122151
Authority: WO
Inventors: 洪国锋; 邓冰洁; 黎兆瑜
Original assignee: 广州视源电子科技股份有限公司; 广州视睿电子科技有限公司
Priority date: 2022-09-28
Filing date: 2022-09-28
Publication date: 2024-04-04
Also published as: CN118104074A

Abstract

A slot antenna and an electronic device. A slot (121) is provided on a grounding plane of a first circuit board (120) as a radiation source; and the first circuit board (120) can be directly stacked on the inner side of a housing (110) of the electronic device, without providing a clearance area for the antenna, thereby facilitating the design of the electronic device in terms of thickness appearance. A wireless feed line (122) and a radio frequency module (132) are respectively provided on the first circuit board (120) and a second circuit board (130) which form a preset included angle, thereby facilitating the implementation of a narrow bevel of the electronic device.

Description

Slot antenna and electronic device

Technical Field

The present invention relates to the field of antenna technology, and in particular to a slot antenna and electronic equipment.

Background technique

With the development of wireless networks, electronic devices with display screens, such as televisions and interactive intelligent panels, are connected to the network through antennas.

As shown in Figure 1, the traditional antenna is: an antenna module is set in the circuit area inside the electronic device, the antenna module is connected to the antenna, and the wireless signal is radiated and received through the antenna. During the design process, in order to avoid the problem of low antenna radiation efficiency caused by the internal circuit area interfering with the antenna, the upper and lower layers of the area where the antenna is located on the board cannot be arranged with metal to provide the clearance area required for antenna radiation. The clearance area requirement limits the freedom of appearance structure design, which is not conducive to the design of the appearance of electronic equipment such as thickness.

Summary of the invention

The present invention provides a slot antenna and an electronic device, which can optimize the design of the electronic device in terms of thickness and appearance, and is conducive to achieving a narrow frame for the electronic device.

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

A first circuit board, wherein the first circuit board is stacked and arranged on the inner side of the housing of the electronic device, a ground plane is arranged on a side of the first circuit board close to the housing, a gap is provided on the ground plane, an antenna feed line is arranged on a side of the first circuit board away from the housing, the antenna feed line is bridged over a narrow side of the gap, and a first end of the antenna feed line is connected to the ground plane;

A second circuit board is arranged in the housing of the electronic device at a preset angle with the first circuit board, and a radio frequency transmission line and a radio frequency module are arranged on the second circuit board. 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 a second aspect, the present invention further provides an electronic device, comprising the slot antenna provided in the first aspect of the present invention.

The slot antenna provided by the present invention comprises: a first circuit board and a second circuit board, the first circuit board is stacked on the inner side of the housing of the electronic device, a ground plane is provided on the side of the first circuit board close to the housing, a slot is provided on the ground plane, an antenna feeder is provided on the side of the first circuit board away from the housing, the antenna feeder is bridged on the narrow side of the slot, the first end of the antenna feeder is connected to the ground plane, the second circuit board is arranged in the housing of the electronic device at a preset angle with the first circuit board, a radio frequency transmission line and a radio frequency module are arranged on the second circuit board, 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 feeder. In the embodiment of the present invention, by setting a slot as a radiation source on the ground plane of the first circuit board, the first circuit board can be directly stacked on the inner side of the housing of the electronic device, without setting a clearance area for the antenna, which is beneficial to the design of the thickness appearance of the electronic device. By respectively setting the antenna feeder and the radio frequency module on the first circuit board and the second circuit board at a preset angle, it is beneficial for the electronic device to achieve a narrow frame.

It should be understood that the content described in this section is not intended to identify the key or important features of the present invention, nor is it intended to limit the scope of the present invention. Other features of the present invention will become easily understood through the following description.

BRIEF DESCRIPTION OF THE DRAWINGS

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

FIG1 is a schematic diagram of the structure of an antenna;

FIG2 is a schematic structural diagram of a slot antenna provided by an embodiment of the present invention;

FIG3 is a schematic diagram of the structure of a gap provided by an embodiment of the present invention;

FIG4 is a partial enlarged view of the connection between the first circuit board and the second circuit board in FIG2;

FIG5 is a schematic structural diagram of a connector provided by an embodiment of the present invention;

FIG6 is an exploded view of a slot antenna provided in an embodiment of the present invention;

FIG. 7 is a graph showing the return loss of the slot antenna according to an embodiment of the present invention.

Detailed ways

In order 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 in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present invention.

In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected", and "fixed" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature. In addition, the terms "first" and "second" are only used to distinguish in description and have no special meaning.

FIG. 2 is a schematic diagram of the structure of a slot antenna provided in an embodiment of the present invention. As shown in FIG. 2 , the slot antenna includes: a first circuit board 120 and a second circuit board 130 .

Among them, the first circuit board 120 is stacked on the inner side of the housing 110 of the electronic device. Exemplarily, the housing 110 can be a side frame, a bottom frame or a top frame of the electronic device, which is not limited in the embodiment of the present invention. It should be noted that, for the sake of convenience of explanation, only one of the frames of the electronic device is shown in Figure 2, and the remaining frames of the electronic device are not shown. Exemplarily, the first circuit board 120 can be stacked on the inner side of the housing 110 by bonding, screw fixing, etc. Among them, the inner side described in the embodiment of the present invention refers to the side facing the inside of the electronic device.

A ground plane is provided on the side of the first circuit board 120 close to the housing 110, and the ground plane is a grounded metal layer. A gap 121 is provided on the ground plane. An antenna feed line 122 is provided on the side of the first circuit board 120 away from the housing 110, and the antenna feed line 122 is connected across 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 ground plane. Exemplarily, the first end of the antenna feed line 122 can extend along the side wall of the first circuit board 120 to the side of the first circuit board 120 close to the metal housing 110, and is connected to the ground plane on the side close to the metal housing 110, or a metal hole can be provided on the first circuit board 120, and the first end of the antenna feed line 122 can extend through the metal hole to the side of the first circuit board 120 close to the metal housing 110, and is connected to the ground plane on the side close to the metal housing 110, which is not limited in the embodiment of the present invention.

In the embodiment of the present invention, the slot 121 may be an elongated slot, and the shape may be a rectangle, an ellipse, etc. In other embodiments of the present invention, branches may also be provided in the slot 121 to increase new frequency resonance and expand bandwidth, which is not limited in the embodiment of the present invention.

The second circuit board 130 is arranged in the electronic device at a preset angle with 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, and the embodiments of the present invention are not limited here. An RF transmission line 131 and an RF module 132 are arranged on the second circuit board 130. The first end of the RF transmission line 131 is connected to the RF module 132, and the second end of the RF transmission line 131 is connected to the second end of the antenna feed line 122.

The RF module 132 can transmit the electrical signal to the feeding point of the antenna feed line 122 and the ground plane through the RF transmission line 131 and the antenna feed line 122. The antenna feed line 122 is connected across the narrow side of the slot 121 to feed the slot antenna. At this time, the slot 121 is excited with a radio frequency electromagnetic field and radiates electromagnetic waves into space. Exemplarily, in a specific embodiment of the present invention, the housing 110 is a non-metallic housing (such as plastic), and the non-metallic housing has no shielding or blocking effect on 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 radiates out through the slot 121. Exemplarily, in a specific embodiment of the present invention, the housing 110 can be a metal housing. Due to the shielding or blocking effect of the metal housing on the radiation generated by the antenna, a slot is also required to be set at the position corresponding to the slot 121 on the housing 110. The slot can be sealed with plastic to avoid the reduction of the sealing of the electronic device. The radiation of the slot antenna is generated by the fringe field between the edge of the antenna feed line 122 and the ground plane, and is radiated through the slot 121 and the slots on the housing 110 .

In the embodiment of the present invention, by setting the gap 121 as a radiation source on the ground plane of the first circuit board 120, the first circuit board 120 can be directly stacked on the inner side of the housing 110 of the electronic device, without setting a clearance area for the antenna, which is beneficial to the design of the thickness and appearance of the electronic device. 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, respectively, it is avoided that the antenna feed line 122 and the radio frequency module 132 are set on the same circuit board, the circuit board size is large, resulting in the problem of increasing the size of the frame of the housing where the stacked circuit board is located, which is beneficial to the electronic device to achieve a narrow frame.

The slot antenna provided by the present invention comprises: a first circuit board and a second circuit board, the first circuit board is stacked on the inner side of the housing of the electronic device, a ground plane is provided on the side of the first circuit board close to the housing, a slot is provided on the ground plane, an antenna feeder is provided on the side of the first circuit board away from the housing, the antenna feeder is bridged on the narrow side of the slot, the first end of the antenna feeder is connected to the ground plane, the second circuit board is arranged in the housing of the electronic device at a preset angle with the first circuit board, a radio frequency transmission line and a radio frequency module are arranged on the second circuit board, 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 feeder. In the embodiment of the present invention, by setting a slot as a radiation source on the ground plane of the first circuit board, the first circuit board can be directly stacked on the inner side of the housing of the electronic device, and there is no need to set a clearance area for the antenna, which is beneficial to the design of the thickness and appearance of the electronic device. By respectively setting the antenna feeder and the radio frequency module on the first circuit board and the second circuit board at a preset angle, the problem of setting the antenna feeder and the radio frequency module on the same circuit board so that the circuit board size is large and the frame size of the housing where the stacked circuit board is located becomes larger is avoided, which is beneficial to the electronic device to achieve a narrow frame.

FIG3 is a schematic diagram of the structure of a slot provided by an embodiment of the present invention. As shown in FIG3 , the slot 121 is elongated, and an "L"-shaped branch 126 is provided in the slot 121. The first end of the branch 126 is connected to the ground plane 127, and the other end extends into the slot 121. Exemplarily, the branch 126 and the ground plane 127 are integrally formed, and the branch 126 extends from the narrow side of the slot 121 into the slot 121. The branch 126 can change the radiation frequency of the antenna and expand the bandwidth. In other embodiments of the present invention, the form and number of the branches are not limited.

Figure 4 is a partial enlarged view of the connection between the first circuit board and the second circuit board in Figure 2. As shown in Figures 2 and 4, 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 RF transmission line 131 are electrically connected through the connector 141.

Exemplarily, in some embodiments of the present invention, connector 141 may be a very short coaxial line. The coaxial line is composed of two coaxial cylindrical conductors and is a wide-band microwave transmission line with air or high-frequency dielectric filled between the inner and outer cylindrical conductors. In other embodiments of the present invention, connector 141 may also be other forms of connectors, such as subminiature push-on connectors (Subminiature Push-On, SMP), metal springs or metal ejectors, which are not limited in the embodiments of the present invention. Among them, subminiature push-on (SMP) connectors are highly shielded, very small interconnects that are 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 easy-to-use design: installers simply push these plug-in connectors together to connect.

The use of coaxial lines increases the loss of the radio frequency system and is not conducive to the assembly and certification of the antenna. To solve this problem, in some embodiments of the present invention, the connector includes a first component and a second component connected to each other; the connector is arranged on a first circuit board, the first component is connected to the antenna feed line, and the second component abuts on the radio frequency transmission line; or, the connector is arranged on a second circuit board, the first component is connected to the radio frequency transmission line, and the second component abuts on the antenna feed line.

FIG5 is a schematic diagram of the structure of a connector provided by an embodiment of the present invention. As shown in FIG5 exemplarily, in an embodiment of the present invention, a connector 141 includes a first component 1411 and a second component 1412 connected to each other. The connector 141 is disposed on the first circuit board 120, and the first component 1411 is connected to the antenna feed line 122. As an example, the first component 1411 is welded on the antenna feed line 122, or the first component 1411 is fixed on the antenna feed line 122 by a conductive adhesive, and the second component 1412 abuts against the RF transmission line 131, thereby realizing the electrical connection between the antenna feed line 122 and the RF transmission line 131.

In some embodiments of the present invention, as shown in FIGS. 4 and 5 , the first component 1411 is generally in the shape of a cube and is provided with an overlap surface (i.e., a surface in contact with the antenna feed line 122 ), and the overlap surface can be fixed to the antenna feed line 122 by conductive adhesive or welded.

In some embodiments of the present invention, as shown in FIGS. 4 and 5 , in order to reduce the weight of the connector 141 and thereby achieve lightweight electronic equipment, the first component 1411 is a hollow structure.

In some embodiments of the present invention, in order to enhance the electrical connection stability between the connector and the RF transmission line, the second component may be a metal spring or a metal ejector pin, which has a certain elasticity and can stably abut against the RF transmission line to avoid the situation where the shaking of the first circuit board or the second circuit board causes a circuit break. Exemplarily, in some embodiments of the present invention, as shown in FIGS. 4 and 5 , the second component 1412 is a metal spring.

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 a conductive metal such as copper or silver.

In some embodiments of the present invention, the antenna feed line 122 and the RF transmission line 131 may be microstrip lines, which are microwave transmission lines consisting of a single conductor strip supported on a dielectric substrate, and a ground plane is made on the other side of the substrate. Microstrip lines are suitable for making planar structure transmission lines of microwave integrated circuits, and compared with metal waveguides, they have small size, light weight, wide frequency band, high reliability, and low manufacturing cost.

In some embodiments of the present invention, as shown in FIG4 , the antenna feed line 122 and the RF transmission line 131 may be coplanar waveguide lines. Among them, the first circuit board 120 is also provided with two

ground planes

123 and 124 coplanar with the antenna feed line 122, and the two

ground planes

123 and 124 are respectively arranged on both sides of the antenna feed line 122, and are insulated and isolated from the antenna feed line 122 to form a coplanar waveguide line. Similarly, the second circuit board 130 is also provided with two

ground planes

133 and 134 coplanar with the RF transmission line 131, and the two

ground planes

133 and 134 are respectively arranged on both sides of the RF transmission line 131, and are insulated and isolated from the RF transmission line 131 to form a coplanar waveguide line. Compared with microstrip lines, coplanar waveguide lines have lower signal transmission loss and dispersion, are easy to manufacture, and are easy to realize the series and parallel connection of passive and active devices in microwave circuits (without the need to punch holes in the substrate), and are easy to improve circuit density.

In some embodiments of the present invention, as shown in FIG4 , at least three connectors are provided at the connection between the first circuit board 120 and the second circuit board 130, which are respectively denoted as 141, 142, and 143. The antenna feed line 122 is electrically connected to the RF transmission line 131 through the first connector 141, the ground plane 123 located on the first side of the antenna feed line 122 is electrically connected to the ground plane 133 located on the first side of the RF transmission line 131 through the second connector 142, and the ground plane 124 located on the second side of the antenna feed line 122 is electrically connected to the ground plane 134 located on the second side of the RF transmission line 131 through the third connector 143. The structures and connection principles of the

connectors

142 and 143 are similar to those of the connector 141, which have been described in detail in the aforementioned embodiments, and will not be repeated in detail in the embodiments of the present invention.

In some embodiments of the present invention, the first circuit board 120 is stacked and fixedly disposed on the inner side of the first side wall of the housing 110, and the second circuit board 130 is stacked and fixedly disposed on the inner side of the second side wall of the housing 110, and the first side wall and the second side wall are two adjacent side walls. In this way, the second circuit board 130 does not need other fixing structures and is directly stacked on the inner side of the second side wall of the metal housing 110, saving material costs.

In some embodiments of the present invention, due to the size and structure of the housing 110, the second circuit board 130 may not be stacked on the other side wall of the housing 110, and an additional bracket for fixing is required to fix the second circuit board 130. FIG. 6 is an exploded view of a slot antenna provided by an embodiment of the present invention. As shown in FIG. 6, the first circuit board 120 is stacked and fixedly arranged on the inner side of one of the side walls of the housing, and the 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 to avoid the relative movement between the two causing the antenna feed line and the RF transmission line to be broken. Exemplarily, in some embodiments of the present invention, the bracket 150 is fixed on the first circuit board 120 to achieve self-fixation, and the second circuit board 130 is fixed on the bracket 150. In other embodiments of the present invention, the bracket can be fixed on the inner side of one of the side walls of the housing to achieve self-fixation, and the second circuit board 130 is fixed on the bracket 150.

In some embodiments of the present invention, as shown in FIG. 6 , the bracket 150 includes a connecting portion 151 and a fixing portion 152 , the connecting portion 151 is fixedly connected to a side of the first circuit board 120 away from the housing, and the second circuit board 130 is fixed on the fixing portion 152 .

In some embodiments of the present invention, as shown in FIG. 6 , the connection portion 151 is provided with a positioning hole 1511, and an 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 housing corresponding to the positioning hole 1511. The positioning member 125 is inserted into the positioning hole 1511, and the connection portion 151 is fixed to the first circuit board 120 by the adhesive, so that the bracket 150 is fixed itself. The positioning member 125 cooperates with the positioning hole 1511 to fix 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, which is not limited in the embodiments of the present invention. In the embodiments of the present invention, the shape, size and number of the positioning holes 1511 are not limited.

Exemplarily, in some embodiments of the present invention, the fixing portion 152 is fixed to the inner side of one of the side walls of the housing by a fixing member to fix the bracket 150 itself. The fixing member may include a locking screw, a buckle, etc., which is not limited in the embodiments of the present invention. The fixing portion 152 is provided with a plurality of internal threaded studs, and the second circuit board 130 is provided with fixing holes matching the internal threaded studs. The fixing portion 152 and the second circuit board 130 are fixed in position by passing the screws through the fixing holes and screwing them into the internal threaded studs. Of course, in other embodiments of the present invention, other fixing methods may also be used to fix the fixing portion 152 and the second circuit board 130, which is not limited in the embodiments of the present invention.

In some embodiments of the present invention, a plurality of antenna feed lines 122 may be configured on the first circuit board 120, and a plurality of slots 121 corresponding one-to-one to the antenna feed lines 122 may be configured on the ground plane on the first circuit board 120, thereby forming a plurality of slot antennas. The plurality of slot antennas may work simultaneously or in time-sharing manner, which is not limited in the embodiments of the present invention.

In some embodiments of the present invention, in order to shield signal interference of other components of the electronic device to the slot antenna, a metal shielding cover is further provided on the first circuit board 120, and the metal shielding cover covers the slot 121, that is, the slot 121 is covered in the metal shielding cover to improve signal accuracy.

In some embodiments of the present invention, the metal shield is reused as the positioning member 125, that is, the positioning member 125 is a hollow shield. In the embodiments of the present invention, the metal shield is reused as the positioning member 125, which saves material costs and helps to make the electronic device lightweight.

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, so that the electronic device becomes the creator of the wireless network, and as the central node of the network, allows other wireless devices to access and provide data access. The antenna connected to the AP radio frequency module is the AP antenna.

In some embodiments of the present invention, the electronic device further includes a station (STA) radio frequency module and a station antenna (STA antenna), and the station radio frequency module and the station antenna are connected and are both arranged on the second circuit board. A STA station is a terminal (such as a laptop, a PDA and other user devices that can be connected to the network) connected to a wireless network, which can be called a station. The STA station itself does not accept wireless access, but it can be connected to a wireless access point.

The present invention simultaneously sets an AP antenna and a STA antenna on the electronic device, so that the electronic device can switch between the AP mode and the STA mode, thereby facilitating the control of the device and access to other devices.

In some embodiments of the present invention, the RF module includes a plurality of RF devices, and the plurality of RF devices are integrated on the second circuit board, so as to improve the integration of the electronic device and facilitate miniaturization of the electronic device. In other embodiments of the present invention, the RF module can be split into a plurality of RF devices, which are arranged on the second circuit board along the extension direction of the RF transmission line, so as to shorten the width of the second circuit board (the width in the direction perpendicular to the RF transmission line), avoid the problem that the second circuit board is wider, resulting in a wider frame of the electronic device, and facilitate the electronic device to achieve a narrow frame.

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

Figure 7 is a return loss diagram of the slot antenna provided in an embodiment of the present invention. As shown in Figure 7, the present invention performs a return loss simulation test on two slot antennas in the 5GHz frequency band. The signal frequency band in which the return loss of one slot antenna is less than 5db is mainly concentrated between 4.96GHz-6.07GHz, and the signal frequency band in which the return loss of the other slot antenna is less than 5db is mainly concentrated between 4.96GHz-6.08GHz. The return loss rates of both are very low.

The embodiment of the present invention further provides an electronic device, comprising at least one slot antenna provided by any of the foregoing embodiments of the present invention. The electronic device may be an interactive smart tablet, a smart phone, a tablet computer, an electronic whiteboard, a smart TV, etc., and the embodiment of the present invention is not limited here.

In the description of this article, it is necessary to understand that the terms "up", "down", "left", "right", and other orientations or positional relationships are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of description and simplification of operation, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

In the description of this specification, the description with reference to the terms "an embodiment", "example", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example.

In addition, it should be understood that although this specification is described according to implementation methods, not every implementation method contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

The technical principle of the present invention is described above in conjunction with specific embodiments. These descriptions are only for explaining the principle of the present invention and cannot be interpreted as limiting the scope of protection of the present invention in any way. Based on the explanations herein, those skilled in the art can associate other specific implementations of the present invention without paying creative labor, and these methods will fall within the scope of protection of the present invention.

Claims

A slot antenna, comprising:

A first circuit board, wherein the first circuit board is stacked and arranged on the inner side of the housing of the electronic device, a ground plane is arranged on the side of the first circuit board close to the housing, a gap is provided on the ground plane, an antenna feed line is arranged on the side of the first circuit board away from the housing, the antenna feed line is bridged over the narrow side of the gap, and a first end of the antenna feed line is connected to the ground plane;

A second circuit board is arranged in the housing of the electronic device at a preset angle with the first circuit board, and a radio frequency transmission line and a radio frequency module are arranged on the second circuit board. 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.
The slot antenna according to claim 1 is characterized in that a branch is provided in the slot, one end of the branch is connected to the ground plane, and the other end extends into the slot.
The slot antenna according to claim 1 is 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 RF transmission line through the connector.
The slot antenna according to claim 3 is characterized in that the connector is a coaxial cable, an ultra-small push-in connector, a metal spring or a metal ejector pin.
The slot antenna according to claim 3, characterized in that the connector comprises a first component and a second component connected to each other;

The connector is disposed on the first circuit board, the first component is connected to the antenna feeder line, and the second component abuts against the radio frequency transmission line; or,

The connector is arranged 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.
According to any one of claims 3-5, the slot antenna is characterized in that the RF transmission line is a coplanar waveguide line, and the first circuit board is also provided with two ground planes coplanar with the antenna feed line, and the two ground planes are respectively arranged on both sides of the antenna feed line and insulated and isolated from the antenna feed line, and the second circuit board is also provided with two ground planes coplanar with the RF transmission line, and the two ground planes are respectively arranged on both sides of the RF transmission line and insulated and isolated from the RF transmission line.
The slot antenna according to claim 6 is characterized in that at least three connectors are arranged at the connection between the first circuit board and the second circuit board, the antenna feed line is connected to the RF transmission line through the first connector, the ground plane located on the first side of the antenna feed line is connected to the ground plane located on the first side of the RF transmission line through the second connector, and the ground plane located on the second side of the antenna feed line is connected to the ground plane located on the second side of the RF transmission line through the third connector.
The slot antenna according to any one of claims 1-5 is characterized in that the first circuit board is stacked and fixedly arranged on the inner side of the first side wall of the shell, the second circuit board is stacked and fixedly arranged on the inner side of the second side wall of the shell, and the first side wall and the second side wall are two adjacent side walls.
The slot antenna according to any one of claims 1-5 is characterized in that the first circuit board is stacked and fixedly arranged on the inner side of one of the side walls of the housing, and the second circuit board is fixed on a bracket.
The slot antenna according to claim 9 is characterized in that the bracket includes a connecting portion and a fixing portion, the connecting portion is fixedly connected to a side of the first circuit board away from the housing, and the second circuit board is fixed on the fixing portion.
The slot antenna according to claim 10 is characterized in that the connecting portion is provided with a positioning hole, an adhesive is provided around the positioning hole, a protruding positioning piece is provided on the side of the first circuit board away from the housing corresponding to the positioning hole, the connecting portion is fixed to the first circuit board by the adhesive, and the positioning piece is passed through the positioning hole.
The slot antenna according to claim 11 is characterized in that a metal shielding cover is also provided on the first circuit board, and the metal shielding cover covers the slot.
The slot antenna according to claim 12 is characterized in that the metal shielding cover is reused as the positioning piece.
The slot antenna according to any one of claims 1-5 is characterized in that the radio frequency module is a wireless access point radio frequency module.
According to any one of claims 1-5, the slot antenna is characterized in that the RF module includes a plurality of RF devices, and the plurality of RF devices are integrated on the second circuit board, or the plurality of RF devices are arranged on the second circuit board along the extension direction of the RF transmission line.
An electronic device, characterized by comprising the slot antenna described in any one of claims 1-15.