Antenna device and household intelligent gateway

Abstract

The utility model provides an antenna device and a household intelligent gateway, the antenna device comprises a first printed board, a second printed board, a third printed board and a fourth printed board, the first printed board and the second printed board are stacked, the third printed board and the fourth printed board are located between the first printed board and the second printed board, and the surface of the first printed board is provided with a first radiation arm and a second radiation arm which are perpendicular to each other and are not connected; the third printed board is provided with a first feed structure and a second feed structure, and the first radiation arm is electrically connected with the first feed structure, so that the first antenna generates horizontal polarization; the second radiation arm is electrically connected with the second feed structure, so that the second antenna generates horizontal polarization orthogonal to the first antenna; the fourth printed board is provided with a third radiation arm perpendicular to the first printed board and a feed port connected with the third radiation arm, and the feed port is connected with the grounding layer on the second printed board so that the third antenna can generate vertical polarization orthogonal to the first antenna and the second antenna. According to the invention, the three linear polarized antennas which are perpendicular to one another are adopted, the space occupied by multiple antennas is reduced, and the capability of receiving different polarized signals is improved.

Description

Technical Field

[0001] The present disclosure relates to the field of antenna technology, and in particular to an antenna device and a home smart gateway. Background Art

[0002] Modern antenna communication technology is developing rapidly. Antennas, as the transceiver equipment of antenna systems, are an indispensable part of communication systems. With the advancement and maturity of Multiple-Input Multiple-Output (MIMO), 5G and 6G technologies, higher requirements are placed on antennas, such as wide bandwidth, low profile, and miniaturization.

[0003] MIMO is to greatly increase the channel capacity. Multiple antennas are used at both the transmitting and receiving ends of the gateway to form an antenna system with multiple channels between the transmitting and receiving ends. With the development of technology, MOMI has been widely used in Wi-Fi. Existing Wi-Fi antennas mostly use spatial diversity to implement MIMO, that is, using multiple identical linearly polarized antennas and pulling the antennas a certain distance apart to achieve it.

[0004] However, when implementing MIMO through multiple identical linearly polarized antennas, a larger spatial size is often required, and the antenna correlation often cannot meet the requirements, resulting in the inability to exert MIMO performance at some angles. In addition, the same-polarized MIMO antenna will not be able to receive electromagnetic wave signals in the perpendicular polarization direction, resulting in reception defects. Utility Model Content

[0005] The embodiments of the present disclosure provide an antenna device and a home smart gateway to reduce the space occupied by multiple antennas and lower the correlation index of MIMO antennas, thereby improving the receiving capability of signals with different polarizations.

[0006] In a first aspect, the present disclosure provides an antenna device, comprising:

[0007] The first printed board is arranged horizontally;

[0008] A second printed board is stacked with the first printed board, and a ground layer is formed on the upper surface of the second printed board facing the first printed board;

[0009] A third printed board is located between the first printed board and the second printed board, and the third printed board is in contact with and connected to the first printed board;

[0010] a fourth printed board, located between the first printed board and the second printed board, the fourth printed board being arranged vertically to the first printed board;

[0011] a first antenna, comprising a first radiating arm and a first feeding structure, wherein the first radiating arm is located on an upper surface of the first printed board, the first feeding structure is located on the third printed board, and the first radiating arm is electrically connected to the first feeding structure to generate horizontal polarization;

[0012] a second antenna, which is not connected to the first antenna, and comprises a second radiating arm and a second feeding structure, wherein the second radiating arm is located on the upper surface of the first printed board, the second radiating arm and the first radiating arm are perpendicular to each other, the second feeding structure is located on the third printed board, and the second radiating arm is electrically connected to the second feeding structure to generate a horizontal polarization orthogonal to the first antenna;

[0013] The third antenna is located on the fourth printed circuit board, and includes a third radiating arm and a feeding port. The third radiating arm is vertically arranged to the first printed circuit board, and the third radiating arm and the ground layer are respectively connected to the feeding port, so that the third antenna generates a vertical polarization orthogonal to the first antenna and the second antenna.

[0014] In a second aspect, the present disclosure provides a home smart gateway, including:

[0015] Circuit boards;

[0016] An antenna device is electrically connected to the circuit board. The antenna device is the antenna device described in the first aspect and is used to generate and receive electromagnetic wave signals.

[0017] As can be seen from the above embodiments, the antenna device provided by the embodiments of the present disclosure includes a first printed board, a second printed board, a third printed board, a fourth printed board, a first antenna, a second antenna and a third antenna, the first printed board is arranged horizontally, the second printed board and the first printed board are arranged in a stacked manner, the third printed board is located between the first printed board and the second printed board, the third printed board is in contact with the first printed board, the fourth printed board is located between the first printed board and the second printed board, and the fourth printed board is arranged vertically with the first printed board, so that a three-dimensional structure is formed by the first printed board, the second printed board, the third printed board and the fourth printed board. The first antenna includes a first radiating arm and a first feeding structure, the first radiating arm is located on the upper surface of the first printed board, the first feeding structure is located on the third printed board, the first radiating arm is electrically connected to the first feeding structure, so that the first radiating arm is fed through the first feeding structure, so that the first radiating arm generates and receives electromagnetic wave signals, so that the first antenna generates a horizontal polarization mode. The second antenna is not connected to the first antenna, the second antenna includes a second radiating arm and a second feeding structure, the second radiating arm is located on the upper surface of the first printed board, the second radiating arm and the first radiating arm are perpendicular to each other, the second feeding structure is located on the third printed board, the second radiating arm is electrically connected to the second feeding structure, so that the second radiating arm is fed through the second feeding structure, so that the second radiating arm generates and receives electromagnetic wave signals, so that the second antenna generates a horizontal polarization mode, and the horizontal polarization mode of the second antenna is perpendicular to the horizontal polarization mode of the first antenna. The third antenna is located on the fourth printed board, the third antenna includes a third radiating arm and a feeding port, the third radiating arm is vertically arranged with the first printed board, a grounding layer is formed on the upper surface of the second printed board facing the first printed board, the third radiating arm and the grounding layer are respectively connected to the feeding port, so that the feeding port transmits a radio frequency signal to the third radiating arm and the grounding layer, so that the third antenna generates and receives electromagnetic wave signals, so that the third antenna generates a vertical polarization mode, and the vertical polarization mode of the third antenna is perpendicular to the horizontal polarization modes of the first antenna and the second antenna.

[0018] The antenna device provided by the present invention arranges the polarization modes of the first antenna, the second antenna, and the third antenna vertically in pairs, so that the three-polarized antenna (MIMO antenna) composed of the first antenna, the second antenna and the third antenna can be compactly arranged in the same position to achieve a miniaturized layout; the three polarized antennas are perpendicular to each other and can effectively receive electromagnetic wave signals of various polarizations in space, and have good receiving performance; the three antennas are polarized vertically, and the correlation coefficient of the MIMO antenna is low, which can better exert the MIMO effect and improve the wireless capacity. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions in the present disclosure, the following briefly introduces the drawings required to be used in some embodiments of the present disclosure. Obviously, the drawings described below are only drawings of some embodiments of the present disclosure. For ordinary technicians in this field, other drawings can also be obtained based on these drawings. In addition, the drawings described below can be regarded as schematic diagrams, and are not intended to limit the actual size of the product involved in the embodiments of the present disclosure, the actual process of the method, the actual timing of the signal, etc.

[0020] Figure 1 This is an application scenario diagram of a home smart gateway provided according to some embodiments;

[0021] Figure 2 A structural diagram of an antenna device provided according to some embodiments of the present disclosure;

[0022] Figure 3 A top view of an antenna device provided according to some embodiments of the present disclosure;

[0023] Figure 4 A partial structure of an antenna device provided according to some embodiments of the present disclosure Figure 1 ;

[0024] Figure 5 A structural diagram of a first antenna in an antenna device provided according to some embodiments of the present disclosure;

[0025] Figure 6 A partial structure of a first antenna in an antenna device according to some embodiments of the present disclosure Figure 1 ;

[0026] Figure 7 A partial structure of a first feeding structure in an antenna device provided according to some embodiments of the present disclosure Figure 1 ;

[0027] Figure 8 A partial structure of a first feeding structure in an antenna device provided according to some embodiments of the present disclosure Figure 2 ;

[0028] Fig. 9 A partial structure of a first antenna in an antenna device according to some embodiments of the present disclosure Figure 2 ;

[0029] Fig.10 A signal transmission route map of a first antenna in an antenna device provided according to some embodiments of the present disclosure;

[0030] Fig.11 is a structural diagram of a third antenna in an antenna device provided according to some embodiments of the present disclosure;

[0031] Fig.12 A partial structure of an antenna device provided according to some embodiments of the present disclosure Figure 2 . DETAILED DESCRIPTION

[0032] Some embodiments of the present disclosure will be described in detail below in conjunction with the accompanying drawings. However, the described embodiments are only a part of the embodiments of the present disclosure, rather than all of the embodiments. Based on the embodiments provided by the present disclosure, all other embodiments obtained by ordinary technicians in this field are within the scope of protection of the present disclosure.

[0033] Unless the context requires otherwise, throughout the specification and claims, the term "comprising" is to be interpreted as having an open, inclusive meaning, that is, "including, but not limited to"; the terms "first" and "second" are not to be understood as indicating or implying relative importance or indicating an upper limit on quantity; the term "plurality" means two or more; the term "connected" is to be understood in a broad sense, for example, "connected" can be a fixed connection, a detachable connection, or an integral connection, and can be directly connected or indirectly connected through an intermediate medium; the use of the terms "suitable for" or "configured to" implies open and inclusive language, which does not exclude devices that are suitable for or configured to perform additional tasks or steps; descriptions such as "parallel", "perpendicular", "same", "consistent", and "flush" are not limited to absolute mathematical theoretical relationships, but also include an acceptable error range generated in practice, and also include differences based on the same design concept but due to manufacturing reasons.

[0034] Figure 1 FIG. 1 is an application scenario diagram of a home smart gateway provided according to some embodiments. Figure 1 As shown, the terminal device 100 is connected to the server 300 through the home smart gateway 200 network. The home smart gateway is a hardware device that connects two or more networks. It is a dedicated intelligent network device that reads the address in each data packet and then decides how to transmit it. The home smart gateway 200 has a built-in antenna for transmitting signals.

[0035] The Multiple-Input Multiple-Output (MIMO) antenna system is designed to greatly increase the channel capacity. Multiple antennas are used at both the transmitting and receiving ends of the home smart gateway 200 to form an antenna system with multiple channels between the transmitting and receiving ends. An obvious feature of the MIMO system is its extremely high spectrum utilization efficiency. On the basis of fully utilizing the existing spectrum resources, it obtains both reliability and effectiveness gains by utilizing space resources.

[0036] With the development of technology, MIMO systems have been widely used in Wi-Fi. Existing Wi-Fi antennas mostly use spatial diversity to implement MIMO, that is, using multiple identical linearly polarized antennas and pulling the antennas apart by a certain distance. However, this solution often requires a larger space size, and the antenna correlation often cannot meet the requirements, resulting in the problem that MIMO performance cannot be exerted at some angles. In addition, the same polarization MIMO antenna will not be able to receive electromagnetic wave signals in the perpendicular polarization direction, resulting in reception defects.

[0037] In order to solve the above problems, an embodiment of the present disclosure provides an antenna device, which uses three mutually perpendicular linear polarization antennas to form a three-polarization MIMO antenna, and uses polarization diversity instead of spatial diversity, which can reduce the space occupied by multiple antennas, reduce the correlation index of MIMO antennas, and improve the receiving capability of signals with different polarizations.

[0038] Figure 2 FIG. 1 is a structural diagram of an antenna device provided according to some embodiments of the present disclosure. Figure 2 As shown, the antenna device provided by the embodiment of the present disclosure includes a first printed board 10, a second printed board 20, a third printed board 30 and a fourth printed board 40. The first printed board 10 is horizontally arranged. For example, the first printed board 10 is a square board. The length direction of the first printed board 10 is arranged along the Y-axis direction, the width direction of the first printed board 10 is arranged along the X-axis direction, and the thickness direction of the first printed board 10 is arranged along the Z-axis direction.

[0039] The second printed board 20 is stacked with the first printed board 10, and the second printed board 20 is located below the first printed board 10, and there is a gap between the first printed board 10 and the second printed board 20. In some embodiments, the second printed board 20 is a square board, and the second printed board 20 is located in the negative direction of the Z axis of the first printed board 10.

[0040] In some embodiments, the second printed board 20 may be disposed horizontally such that the first printed board 10 and the second printed board 20 are parallel to each other.

[0041] In some embodiments, the second printed board 20 may also be arranged at an angle, and the second printed board 20 is not connected to the first printed board 10, that is, the second printed board 20 and the first printed board 10 are not parallel to each other.

[0042] The third printed board 30 and the fourth printed board 40 are located between the first printed board 10 and the second printed board 20. The bottom end (negative end of the Z axis) of the third printed board 30 can be fixedly connected to the second printed board 20, and the top end (positive end of the Z axis) of the third printed board 30 is fixedly connected to the first printed board 10.

[0043] In some embodiments, the third printed board 30 is a square board, the third printed board 30 is tilted, the length direction of the third printed board 30 is set along a diagonal direction of the first printed board 10, and the length dimension of the third printed board 30 is smaller than the diagonal dimension of the first printed board 10.

[0044] In some embodiments, the width direction of the third printed board 30 can be set along the Z-axis direction, and the thickness direction of the third printed board 30 can be set along the other diagonal direction of the first printed board 10, so that the third printed board 30 is set perpendicular to the first printed board 10, and the length direction of the third printed board 30 is set at 45 degrees to the side of the first printed board 10.

[0045] In some embodiments, the first printed board 10 and the second printed board 20 are distributed up and down, the first printed board 10 and the second printed board 20 are equal in size and parallel to each other, and there is a first gap between the first printed board 10 and the second printed board 20, and the first gap is not greater than the width dimension (dimension along the Z-axis direction) of the third printed board 30.

[0046] For example, the top surface of the third printed board 30 is fixedly connected to the lower surface (negative end of the Z axis) of the first printed board 10, so that the first gap is equal to the width dimension of the third printed board 30; a socket may be formed on the first printed board 10, and the third printed board 30 is inserted into the socket to realize the fixed connection between the third printed board 30 and the first printed board 10, and the top surface (positive end of the Z axis) of the third printed board 30 protrudes from the upper surface of the first printed board 10, so that the first gap is smaller than the width dimension of the third printed board 30.

[0047] In some embodiments, the jack on the first printed circuit board 10 is tilted, and the length direction of the jack is parallel to the diagonal axis of the first printed circuit board 10, so that the third printed circuit board 30 is perpendicular to the first printed circuit board 10, and the length direction of the third printed circuit board 30 is 45 degrees to the side of the first printed circuit board 10.

[0048] In some embodiments, the third printed board 30 may not be arranged perpendicular to the first printed board 10, as long as the third printed board 30 is located in the projection area of ​​the first printed board 10 and the top of the third printed board 30 is in contact with and connected to the first printed board 10.

[0049] The bottom end (negative end of the Z axis) of the fourth printed board 40 is fixedly connected to the second printed board 20, the top end of the fourth printed board 40 can be in contact with the first printed board 10, the top end of the fourth printed board 40 can also be out of contact with the first printed board 10, and the fourth printed board 40 is vertically arranged to the first printed board 10.

[0050] In some embodiments, the fourth printed board 40 is a square board, the length direction of the fourth printed board 40 is set along the Z-axis direction, the width dimension of the fourth printed board 40 is set along a diagonal direction of the first printed board 10, and the thickness dimension of the fourth printed board 40 is set along another diagonal direction of the first printed board 10.

[0051] The third printed board 30 can be arranged in parallel with the fourth printed board 40 , and the length dimension of the third printed board 30 is greater than the width dimension of the fourth printed board 40 , so that the area dimension of the third printed board 30 is greater than the area dimension of the fourth printed board 40 .

[0052] In some embodiments, when the third printed board 30 and the fourth printed board 40 are arranged in parallel, there is a second gap between the third printed board 30 and the fourth printed board 40, and the second gap is smaller than the diagonal dimension of the first printed board 10, so that the third printed board 30 and the fourth printed board 40 are located within the projection area of ​​the first printed board 10.

[0053] The first printed board 10 and the second printed board 20 are arranged parallel to each other up and down, and the third printed board 30 and the fourth printed board 40 are placed in the gap between the first printed board 10 and the second printed board 20. The third printed board 30 and the fourth printed board 40 are arranged in parallel, and the central axis of the third printed board 30 and the fourth printed board 40 is arranged along the diagonal direction of the first printed board 10. The third printed board 30 and the fourth printed board 40 are arranged perpendicular to the first printed board 10. In this way, the first printed board 10, the second printed board 20, the third printed board 30 and the fourth printed board 40 form a three-dimensional structure.

[0054] Reference Figure 2 The antenna device provided in the embodiment of the present disclosure further includes a first antenna 50, a second antenna 60 and a third antenna 70. The first antenna 50 and the second antenna 60 may be the same dipole antenna. The polarization modes of the first antenna 50 and the second antenna 60 are perpendicular to each other. The first antenna 50 and the second antenna 60 form an L-shaped symmetrical structure at the opposite ends to form two orthogonal linear polarization modes through the first antenna 50 and the second antenna 60. The third antenna 70 is a vertical monopole antenna. The third antenna 70 is located at the symmetry axis of the two dipole antennas. The polarization mode of the third antenna 70 is perpendicular to the polarization modes of the first antenna 50 and the second antenna 60 to form a tripolarized antenna with three polarization modes perpendicular to each other.

[0055] The first antenna 50 includes a first radiating arm 101 and a first feeding structure 301. The first radiating arm 101 is located on the upper surface (positive end of the Z axis) of the first printed circuit board 10. The first feeding structure 301 is located on the third printed circuit board 30. The first radiating arm 101 is electrically connected to the first feeding structure 301 so as to feed the first radiating arm 101 through the first feeding structure 301, so that the first radiating arm 101 generates and receives electromagnetic wave signals.

[0056] Since the first printed circuit board 10 is arranged horizontally and the first radiation arm 101 is located on the first printed circuit board 10 , the radio frequency signal in the first radiation arm 101 is transmitted in the horizontal direction, so that the first antenna 50 generates a horizontal polarization mode.

[0057] The second antenna 60 includes a second radiating arm 102 and a second feeding structure 302. The second radiating arm 102 is located on the upper surface of the first printed board 10. The second radiating arm 102 and the first radiating arm 101 are perpendicular to each other, and the second radiating arm 102 is not connected to the first radiating arm 101. The second feeding structure 302 is located on the third printed board 30. The second feeding structure 302 is not connected to the first feeding structure 301. The second radiating arm 102 is electrically connected to the second feeding structure 302, so that the second radiating arm 102 is fed through the second feeding structure 302, so that the second radiating arm 102 generates and receives electromagnetic wave signals.

[0058] Since the first printed circuit board 10 is horizontally arranged and the second radiating arm 102 is located on the first printed circuit board 10, the radio frequency signal in the second radiating arm 102 is transmitted in the horizontal direction. Thus, the second antenna 60 generates a horizontal polarization mode. Moreover, since the second radiating arm 102 is perpendicular to the first radiating arm 101, the horizontal polarization mode generated by the second antenna 60 is perpendicular to the horizontal polarization mode generated by the first antenna 50, so that the antenna device receives horizontally polarized electromagnetic wave signals from different angles.

[0059] In some embodiments, reference Figure 2 Since the first feeding structure 301 and the second feeding structure 302 are located on the third printed board 30, the first feeding structure 301 is electrically connected to the first radiating arm 101 on the first printed board 10, and the second feeding structure 302 is electrically connected to the second radiating arm 102 on the first printed board 10, and in order to enable the antenna device to receive horizontally polarized electromagnetic wave signals from different angles, a certain distance is required between the first antenna 50 and the second antenna 60. Therefore, the third printed board 30 can pass through the first radiating arm 101 and the second radiating arm 102 to facilitate the electrical connection of the first feeding structure 301 with the first radiating arm 101, and the electrical connection of the second feeding structure 302 with the second radiating arm 102.

[0060] The third antenna 70 includes a third radiating arm, a feeding port and a grounding layer. The third radiating arm and the feeding port are located on the fourth printed board 40. The third radiating arm is arranged along the length direction (Z-axis direction) of the fourth printed board 40, so that the third radiating arm is perpendicular to the first printed board 10. The grounding layer is located on the upper surface of the second printed board 20. The feeding port is connected to the third radiating arm to transmit a radio frequency signal to the third radiating arm; the feeding port is connected to the grounding layer so that the radio frequency signal refluxes on the grounding layer, so that the third antenna 70 generates and receives electromagnetic wave signals.

[0061] Since the third radiation arm is perpendicular to the first printed circuit board 10, the third radiation arm is perpendicular to the first radiation arm 101 and the second radiation arm 102, and the RF signal of the third radiation arm is transmitted along the Z-axis direction, so that the third antenna 70 generates a vertical polarization mode, and the vertical polarization mode generated by the third antenna 70 is perpendicular to the horizontal polarization mode generated by the first antenna 50 and the horizontal polarization mode generated by the second antenna 60.

[0062] In this way, the polarization modes of the first antenna 50, the second antenna 60 and the third antenna 70 are perpendicular to each other, so that the antenna device can effectively receive electromagnetic wave signals of various polarizations in space, and the antenna device has good receiving performance.

[0063] Reference Figure 2 Since the first printed circuit board 10 is a square board, the first radiation arm 101 and the second radiation arm 102 are both located on the upper surface of the first printed circuit board 10, and the first radiation arm 101 and the second radiation arm 102 are perpendicular to each other. In this way, the first radiation arm 101 can be arranged along the Y-axis direction and the second radiation arm 102 can be arranged along the X-axis direction, or the first radiation arm 101 can be arranged along the X-axis direction and the second radiation arm 102 can be arranged along the Y-axis direction.

[0064] Figure 3 is a top view of an antenna device provided according to some embodiments of the present disclosure, Figure 4 A partial structure of an antenna device provided according to some embodiments of the present disclosure Figure 1 .like Figure 3 and Figure 4 As shown, taking the first radiation arm 101 arranged along the Y-axis direction and the second radiation arm 102 arranged along the X-axis direction as an example, in order for the antenna device to receive horizontally polarized electromagnetic wave signals from different angles, the first radiation arm 101 and the second radiation arm 102 need to have a certain distance. In order to ensure the distance between the first radiation arm 101 and the second radiation arm 102, the first radiation arm 101 extends along the Y-axis direction close to one edge of the first printed circuit board 10, and the second radiation arm 102 extends along the X-axis direction close to the other edge of the first printed circuit board 10. The first radiation arm 101 and the second radiation arm 102 are symmetrically arranged relative to the diagonal axis of the first printed circuit board 10, so that the first radiation arm 101 and the second radiation arm 102 form an "∧" L shape.

[0065] When the first radiation arm 101 is disposed along the Y-axis direction, the first radiation arm 101 has a first length dimension L1 and a first width dimension w1. When the second radiation arm 102 is disposed along the X-axis direction, the second radiation arm 102 has a second length dimension L2 and a second width dimension w2.

[0066] Since the first radiation arm 101 and the second radiation arm 102 are symmetrically arranged relative to the diagonal axis of the first printed circuit board 10, the first length dimension L1 of the first radiation arm 101 can be equal to the second length dimension L2 of the second radiation arm 102, and the first width dimension w1 of the first radiation arm 101 can be equal to the second width dimension w2 of the second radiation arm 102, so that the first radiation arm 101 and the second radiation arm 102 have the same size.

[0067] In some embodiments, the length dimension of the radiating arm is related to the width dimension and the operating frequency of the antenna. When the operating frequency of the antenna is 2.4G, the first length dimension L1 of the first radiating arm 101 is 50mm, and the first width dimension w1 is 5mm; when the operating frequency of the antenna is 5G, the first length dimension L1 of the first radiating arm 101 is 20mm, and the first width dimension w1 is 2mm.

[0068] Figure 5 is a structural diagram of a first antenna in an antenna device provided according to some embodiments of the present disclosure, Figure 6 A partial structure of a first antenna in an antenna device according to some embodiments of the present disclosure Figure 1 .like Figure 5 and Figure 6 As shown, since the third printed board 30 passes through the first radiation arm 101 and the second radiation arm 102, the first radiation arm 101 includes a first radiation arm 1010 and a second radiation arm 1011, the first radiation arm 1010 and the second radiation arm 1011 are located on the upper surface of the first printed board 10, and the first radiation arm 1010 and the second radiation arm 1011 are located on different sides of the third printed board 30, that is, there is a gap between the first radiation arm 1010 and the second radiation arm 1011, and the third printed board 30 is located in the gap.

[0069] A first feeding structure 301 is provided on the surface of the third printed circuit board 30. One end of the first feeding structure 301 is electrically connected to the first radiating arm 1010 to transmit a radio frequency signal to the first radiating arm 1010. The other end of the first feeding structure 301 is electrically connected to the second radiating arm 1011 to transmit a radio frequency signal to the second radiating arm 1011, so that the first radiating arm 101 generates a horizontal polarization mode along the Y-axis direction.

[0070] The first feeding structure 301 includes a first strip line 3010 and a first ground line 3011. The first strip line 3010 is located on the side (front) of the third printed board 30 facing the first radiation branch arm 1010, and the first strip line 3010 is used to access the radio frequency signal. The first ground line 3011 is located on the side (back) of the third printed board 30 facing the second radiation branch arm 1011, and the first ground line 3011 is coupled to the first strip line 3010, and the first strip line 3010 couples the radio frequency signal to the first ground line 3011.

[0071] One end of the first ground wire 3011 is electrically connected to the second radiation branch arm 1011 to transmit the radio frequency signal to the second radiation branch arm 1011, so that the second radiation branch arm 1011 transmits the radio frequency signal along the Y-axis direction.

[0072] Since the first radiation branch arm 1010 and the first ground wire 3011 are located on different sides of the third printed board 30, in order for the first radiation branch arm 1010 to receive the radio frequency signal transmitted by the first ground wire 3011, a first feeding plate 3012 is further provided on the front side of the third printed board 30. The first feeding plate 3012 is located on the front side of the third printed board 30 protruding from the upper surface of the first printed board 10. The first feeding plate 3012 is in contact with and electrically connected to the first radiation branch arm 1010. The first feeding plate 3012 is electrically connected to the other end of the first ground wire 3011 through a via. In this way, the first ground wire 3011 transmits the radio frequency signal to the first feeding plate 3012 through the via, and the first feeding plate 3012 transmits the radio frequency signal to the first radiation branch arm 1010, so that the first radiation branch arm 1010 transmits the radio frequency signal along the Y-axis direction.

[0073] Reference Figure 2 and Figure 6 In order to make the first feeding plate 3012 contact and electrically connect with the first radiation branch arm 1010, a first contact surface 1012 is formed at one end of the first radiation branch arm 1010 facing the second radiation branch arm 1011, and the first contact surface 1012 is inclined and arranged along the length direction of the third printed board 30. The first feeding plate 3012 extends from the top of the third printed board 30 along the negative direction of the Z axis, and the bottom end (negative end of the Z axis) of the first feeding plate 3012 is contacted and electrically connected with the first contact surface 1012, so as to transmit the radio frequency signal transmitted by the first feeding plate 3012 to the first radiation branch arm 1010.

[0074] To facilitate the electrical connection between the first ground wire 3011 and the second radiation branch arm 1011, a second contact surface 1013 is formed on one end of the second radiation branch arm 1011 facing the first radiation branch arm 1010, and the second contact surface 1013 is inclined and arranged along the length direction of the third printed circuit board 30, so that the second contact surface 1013 is arranged parallel to the first contact surface 1012. The first ground wire 3011 is in contact and electrically connected with the second contact surface 1013, so as to transmit the radio frequency signal transmitted by the first ground wire 3011 to the second radiation branch arm 1011.

[0075] Figure 7 A partial structure of a first feeding structure in an antenna device provided according to some embodiments of the present disclosure Figure 1 .like Figure 5 and Figure 7As shown, the first strip line 3010 includes a first microstrip line 3013, a second microstrip line 3014 and a connecting strip line 3016. The first microstrip line 3013 extends from the bottom end of the front side of the third printed board 30 along the positive direction of the Z axis. The first microstrip line 3013 is not connected to the first radiation branch arm 1010. The bottom end of the first microstrip line 3013 is connected to the feeding port of the antenna device to access the radio frequency signal.

[0076] One end of the connecting strip line 3016 is electrically connected to the top of the first microstrip line 3013 , and the other end of the connecting strip line 3016 is electrically connected to the top of the second microstrip line 3014 , so that the first microstrip line 3013 and the second microstrip line 3014 are connected through the connecting strip line 3016 .

[0077] The second microstrip line 3014 extends from one end of the connecting strip line 3016 along the negative direction of the Z axis, so that the first microstrip line 3013 , the connecting strip line 3016 and the second microstrip line 3014 form an n-type strip line.

[0078] In some embodiments, the first microstrip line 3013 has a third length dimension L3 along the Z-axis direction, the first microstrip line has a third width dimension, the second microstrip line 3014 has a fourth length dimension L4 along the Z-axis direction, the second microstrip line 3014 has a fourth width dimension, and there is a first gap 3015 between the second microstrip line 3014 and the first microstrip line 3013, and the first gap 3015 has a width dimension w3.

[0079] Since the bottom end of the first microstrip line 3013 is connected to the feeding port, and the bottom end of the second microstrip line 3014 is coupled to the first ground line 3011, the third length dimension L3 is greater than the fourth length dimension L4, so as to facilitate access to the RF signal and realize coupling of the RF signal.

[0080] In some embodiments, when the operating frequency of the antenna device is 2.4G, the third length dimension L3 is generally 20-25 mm; when the operating frequency of the antenna device is 5G, the third length dimension L3 is generally 10-15 mm.

[0081] Since the antenna device has different operating frequencies, the width of the first strip line 3010 is related to the operating frequency. Generally, the higher the operating frequency, the larger the width of the first strip line 3010. Therefore, the first microstrip line 3013 connected to the radio frequency signal has a wider width.

[0082] Since the second microstrip line 3014 is coupled to the first ground line 3011 , in order to couple the RF signal to the first ground line 3011 , the width of the second microstrip line 3014 is generally smaller, so the third width of the first microstrip line 3013 can be greater than the fourth width of the second microstrip line 3014 .

[0083] In some embodiments, the width of the first microstrip line 3013 may be 1 to 5 mm, the width of the second microstrip line 3014 may be 0.5 to 2 mm, and the width w3 of the first gap 3015 may be 2 to 3 mm.

[0084] In some embodiments, the widths of the first microstrip line 3013 and the second microstrip line 3014 may be adjusted according to the operating frequency of the antenna device, as long as the radio frequency signal connected to the first strip line 3010 can be coupled to the first ground line 3011 .

[0085] Figure 8 A partial structure of a first feeding structure in an antenna device provided according to some embodiments of the present disclosure Figure 2 .like Figure 5 and Figure 8 As shown, the first ground wire 3011 includes a first ground wire 3017, a second ground wire 3018 and a connecting ground wire 3033. The first ground wire 3017 extends from the top of the front side of the third printed circuit board 30 along the negative direction of the Z axis. The top of the first ground wire 3017 can protrude from the upper surface of the first printed circuit board 10. The first ground wire 3017 is electrically connected to the first feeding plate 3012 through a via.

[0086] One end of the connecting ground wire 3033 is connected to the bottom end (negative end of the Z axis) of the first ground wire 3017 , and the other end of the connecting ground wire 3033 is connected to the second ground wire 3018 , so as to realize the connection between the first ground wire 3017 and the second ground wire 3018 through the connecting ground wire 3033 .

[0087] The second grounding wire 3018 is arranged parallel to the first grounding wire 3017, the bottom end of the second grounding wire 3018 is connected to the connecting ground wire 3033, the second grounding wire 3018 extends along the positive direction of the Z axis, the top end of the second grounding wire 3018 can protrude from the upper surface of the first printed circuit board 10, and the second grounding wire 3018 is in contact and electrically connected with the second contact surface 1013 of the second radiation branch arm 1011.

[0088] There is a second gap 3034 between the first grounding wire 3017 and the second grounding wire 3018 , so that the first grounding wire 3017 , the connecting grounding wire 3033 and the second grounding wire 3018 form a U-shaped grounding wire.

[0089] In some embodiments, the first grounding line 3017 has a fifth length dimension L5 along the Z-axis direction, the second grounding line 3018 has a sixth length dimension along the Z-axis direction, and the fifth length dimension L5 is equal to the sixth length dimension. The width dimension w4 of the second gap 3034 may be 2-3 mm.

[0090] In some embodiments, when the operating frequency of the antenna device is 2.4G, the fifth length dimension L5 is generally 25-30 mm; when the operating frequency of the antenna device is 5G, the fifth length dimension L5 is generally 15-20 mm.

[0091] Reference Figure 8 In order to realize the electrical connection between the first grounding line 3017 and the first radiation branch arm 1010, the first grounding line 3017 includes a first grounding sub-line 3030 and a second grounding sub-line 3019. The first grounding sub-line 3030 is located above the second grounding sub-line 3019. The first grounding sub-line 3030 protrudes from the upper surface of the first printed circuit board 10. The first grounding sub-line 3030 is arranged corresponding to the first feeding plate 3012, and the first grounding sub-line 3030 is electrically connected to the first feeding plate 3012 through a via.

[0092] In some embodiments, the width of the first grounding sub-line 3030 is smaller than the width of the second grounding sub-line 3019 , so as to facilitate the transmission of the RF signal transmitted by the first grounding sub-line 3030 to the first feeding plate 3012 through the via hole.

[0093] In order to achieve electrical connection between the second grounding line 3018 and the second radiation branch arm 1011, the second grounding line 3018 includes a third grounding sub-line 3032 and a fourth grounding sub-line 3031, the third grounding sub-line 3032 is located above the fourth grounding sub-line 3031, the third grounding sub-line 3032 protrudes from the upper surface of the first printed circuit board 10, and the third grounding sub-line 3032 is electrically connected to the second radiation branch arm 1011.

[0094] The bottom end of the fourth ground sub-line 3031 is coupled to the bottom end of the second microstrip line 3014 to couple the RF signal transmitted by the second microstrip line 3014 to the fourth ground sub-line 3031, and the RF signal is transmitted to the third ground sub-line 3032 via the fourth ground sub-line 3031, and then transmitted to the second radiation branch arm 1011 via the third ground sub-line 3032.

[0095] In some embodiments, the width of the third grounding sub-line 3032 is smaller than the width of the fourth grounding sub-line 3031 , so as to facilitate transmission of the RF signal transmitted by the third grounding sub-line 3032 to the second radiation branch arm 1011 .

[0096] Fig. 9 A partial structure of a first antenna in an antenna device according to some embodiments of the present disclosure Figure 2 , Fig.10 FIG. 1 is a signal transmission route diagram of a first antenna in an antenna device according to some embodiments of the present disclosure. Fig. 9 and Fig.10As shown, the second grounding wire 3018 on the back side of the third printed circuit board 30 is electrically connected to the second contact surface 1013 on the second radiation arm 1011, the first grounding wire 3017 is electrically connected to the first feeding plate 3012 through a via, and after the first feeding plate 3012 is electrically connected to the first contact surface 1012 on the first radiation arm 1010, the feeding port of the antenna device transmits a radio frequency signal to the bottom end of the first microstrip line 3013, the radio frequency signal is transmitted along the first microstrip line 3013 in the positive direction of the Z axis, and then the radio frequency signal is transmitted to the connecting strip line 3016, and then the radio frequency signal is transmitted to the second microstrip line 3014, and the radio frequency signal is transmitted along the second microstrip line 3014 in the negative direction of the Z axis.

[0097] The radio frequency signal is coupled to the bottom end of the second ground line 3018 at the bottom end of the second microstrip line 3014, and the negative signal in the radio frequency signal is transmitted along the second ground line 3018 toward the positive direction of the Z axis, so that the feed current is transmitted along the negative direction of the Z axis in the second ground line 3018. The negative signal is transmitted to the second radiation branch arm 1011 through the second ground line 3018, so that the feed current is transmitted along the positive direction of the Y axis in the second radiation branch arm 1011, so that the second radiation branch arm 1011 generates horizontal polarization transmitted along the positive direction of the Y axis.

[0098] The positive signal in the RF signal is transmitted along the connecting ground line 3033, and the positive signal is transmitted to the first ground line 3017 through the connecting ground line 3033. The positive signal is transmitted along the first ground line 3017 in the positive direction of the Z axis, so that the feed current is transmitted along the positive direction of the Z axis in the first ground line 3017. The positive signal is transmitted to the first feeding plate 3012 through the via hole, and then transmitted to the first radiating branch arm 1010 through the first feeding plate 3012, so that the feed current is transmitted in the first radiating branch arm 1010 along the positive direction of the Y axis, so that the first radiating branch arm 1010 generates horizontal polarization transmitted along the positive direction of the Y axis.

[0099] In some embodiments, the first ground line 3011 is not grounded, and the RF signal forms a backflow between the first strip line 3010, the first ground line 3011, the first radiation branch arm 1010 and the second radiation branch arm 1011, so that the first antenna 50 generates a horizontal polarization mode along the Y-axis direction.

[0100] Similarly, refer to Figure 4 The second radiation arm 102 includes a third radiation arm 1020 and a fourth radiation arm 1021, the third radiation arm 1020 and the fourth radiation arm 1021 are located on the upper surface of the first printed board 10, the third radiation arm 1020 and the fourth radiation arm 1021 are arranged along the X-axis direction, the third radiation arm 1020 and the fourth radiation arm 1021 are located on different sides of the third printed board 30, that is, there is a gap between the third radiation arm 1020 and the fourth radiation arm 1021, and the third printed board 30 is located in the gap.

[0101] A second feeding structure 302 is arranged on the surface of the third printed board 30. The second feeding structure 302 includes a second strip line 3020 and a second ground line 3021. The second strip line 3020 is located on the front side of the third printed board 30, and the second ground line 3021 is located on the back side of the third printed board 30. The second strip line 3020 is an N-type strip line, and the second ground line 3021 is a U-type ground line.

[0102] The bottom of one end of the second strip line 3020 is electrically connected to the feeding end of the antenna device to receive the RF signal; the bottom of the other end of the second strip line 3020 is coupled and connected to the second ground line 3021 to transmit the RF signal transmitted by the second strip line 3020 to the second ground line 3021.

[0103] The top of one end of the second ground wire 3021 is in contact and electrically connected with the fourth radiation branch arm 1021. The second ground wire 3021 transmits the RF signal to the fourth radiation branch arm 1021. The feed current generated by the RF signal is transmitted along the negative direction of the X-axis in the fourth radiation branch arm 1021, so that the fourth radiation branch arm 1021 generates horizontal polarization along the negative direction of the X-axis.

[0104] A second feeding plate 3022 is also provided on the front side of the third printed board 30. The second feeding plate 3022 can be located on the front side of the third printed board 30 protruding from the upper surface of the first printed board 10. The second feeding plate 3022 is in contact with and electrically connected to the third radiation branch arm 1020, and the second feeding plate 3022 is arranged corresponding to the top end of one end of the second ground wire 3021. The second feeding plate 3022 is electrically connected to the top end of one end of the second ground wire 3021 through a via, so that the second ground wire 3021 transmits the RF signal to the second feeding plate 3022, and the second feeding plate 3022 transmits the RF signal to the third radiation branch arm 1020. The feeding current generated by the RF signal is transmitted in the third radiation branch arm 1020 along the negative direction of the X-axis, so that the third radiation branch arm 1020 generates horizontal polarization along the negative direction of the X-axis.

[0105] Fig.11 FIG. 1 is a structural diagram of a third antenna in an antenna device provided according to some embodiments of the present disclosure. Fig.11 As shown, the third antenna 70 includes a third radiating arm 701, a feeding port 702 and a ground layer, and the third radiating arm 701 is electrically connected to the feeding port 702 to transmit a radio frequency signal to the third radiating arm 701 through the feeding port 702. Since the third radiating arm 701 is arranged on the fourth printed board 40 along the Z-axis direction, the feeding current generated by the radio frequency signal is transmitted in the third radiating arm 701 along the positive direction of the Z-axis, so that the third radiating arm 701 generates vertical polarization along the positive direction of the Z-axis.

[0106] The ground layer is located on the upper surface of the second printed board 20 facing the first printed board 10, and the third radiating arm 701 is not connected to the ground layer to avoid a short circuit between the third radiating arm 701 and the ground layer. The feeding port 702 is electrically connected to the ground layer to return the RF signal through the ground layer, so that the third antenna 70 generates a vertical polarization mode along the Z-axis direction.

[0107] In some embodiments, the operating frequency of the third antenna 70 is related to the length of the third radiation arm 701 along the Z-axis direction, and the length and width of the third radiation arm 701 can be adjusted according to the operating frequency of the third antenna 70 .

[0108] For example, when the operating frequency of the antenna device is 2.4G, the length of the third radiation arm 701 is 15-20mm, and the width of the third radiation arm 701 is 2-5mm; when the operating frequency of the antenna device is 5G, the length of the third radiation arm 701 is 10-15mm, and the width of the third radiation arm 701 is 1-2mm.

[0109] In some embodiments, the first antenna 50 and the second antenna 60 are symmetrically arranged relative to the diagonal axis of the first printed circuit board 10, and the third antenna 70 is located on the symmetry axis of the first antenna 50 and the second antenna 60. In order to adjust the correlation coefficient of the first antenna 50, the second antenna 60 and the third antenna 70, the distance between the fourth printed circuit board 40 and the third printed circuit board 30 can be adjusted to adjust the distance between the first antenna 50, the second antenna 60 and the third antenna 70.

[0110] Fig.12 A partial structure of an antenna device provided according to some embodiments of the present disclosure Figure 2 .like Fig.12 As shown, the first printed board 10 and the second printed board 20 are arranged parallel to each other up and down, the third printed board 30 and the fourth printed board 40 are placed in the gap between the first printed board 10 and the second printed board 20, the third printed board 30 and the fourth printed board 40 are arranged in parallel, the central axis of the third printed board 30 and the fourth printed board 40 is arranged along the diagonal direction of the first printed board 10, and the third printed board 30 and the fourth printed board 40 are arranged perpendicular to the first printed board 10, so that the first printed board 10, the second printed board 20, the third printed board 30 and the fourth printed board 40 form a three-dimensional structure.

[0111] The first radiation branch arm 1010 and the second radiation branch arm 1011 are arranged on the upper surface of the first printed circuit board 10 along the Y-axis direction, the first strip line 3010 is arranged on the front surface of the third printed circuit board 30, and the first ground line 3011 is arranged on the back surface of the third printed circuit board 30. The first strip line 3010 is electrically connected to the feeding end of the antenna device to access the radio frequency signal.

[0112] One end of the first ground wire 3011 is in contact and electrically connected to the second radiation branch arm 1011 , and the other end of the first ground wire 3011 is electrically connected to the first feeding plate 3012 on the front surface of the third printed circuit board 30 through a via, and the first feeding plate 3012 is in contact and electrically connected to the first radiation branch arm 1010 .

[0113] The first strip line 3010 couples the RF signal to the first ground line 3011, one end of the first ground line 3011 transmits the RF signal to the first radiating arm 1010 through the first feeding plate 3012, and the other end of the first ground line 3011 transmits the RF signal to the second radiating arm 1011, so that the first radiating arm 101 generates horizontal polarization along the Y-axis direction. In this way, the first antenna 50 generates a horizontal polarization pattern along the Y-axis direction.

[0114] The third radiation branch arm 1020 and the fourth radiation branch arm 1021 are arranged on the upper surface of the first printed circuit board 10 along the X-axis direction, the second strip line 3020 is arranged on the front side of the third printed circuit board 30, and the second ground line 3021 is arranged on the back side of the third printed circuit board 30. The second strip line 3020 is electrically connected to the feeding end of the antenna device to access the radio frequency signal.

[0115] One end of the second ground wire 3021 is in contact and electrically connected to the fourth radiation branch arm 1021 , and the other end of the second ground wire 3021 is electrically connected to the second feeding plate 3022 on the front surface of the third printed circuit board 30 through a via hole, and the second feeding plate 3022 is in contact and electrically connected to the third radiation branch arm 1020 .

[0116] The second strip line 3020 couples the RF signal to the second ground line 3021, one end of the second ground line 3021 transmits the RF signal to the third radiation arm 1020 through the second feeding plate 3022, and the other end of the second ground line 3021 transmits the RF signal to the fourth radiation arm 1021, so that the second radiation arm 102 generates horizontal polarization along the X-axis direction. In this way, the second antenna 60 generates a horizontal polarization pattern along the X-axis direction.

[0117] The third radiating arm 701 is arranged on the fourth printed circuit board 40 along the Z-axis direction, and the third radiating arm 701 is connected to the ground layer and the feeding port respectively. The third radiating arm 701 is connected to the RF signal, and the RF signal is refluxed on the ground layer, so that the third antenna 70 generates a vertical polarization mode along the Z-axis direction.

[0118] In this way, the first printed board 10, the second printed board 20, the third printed board 30 and the fourth printed board 40 form a three-dimensional structure, and the first antenna 50, the second antenna 60 and the third antenna 70 are arranged in the three-dimensional structure, and the first antenna 50, the second antenna 60 and the third antenna 70 are arranged vertically in pairs to form a three-pole MIMO antenna. The three antennas can be compactly arranged in the same position, realizing the miniaturized layout of the three-pole MIMO antenna.

[0119] The first antenna 50 generates a horizontal polarization pattern along the Y-axis direction, the second antenna 60 generates a horizontal polarization pattern along the X-axis direction, and the third antenna 70 generates a vertical polarization pattern along the Z-axis direction. The three polarized vertical antennas can effectively receive electromagnetic wave signals of various polarizations in space, so that the three-pole MIMO antenna has good receiving performance.

[0120] The polarization modes of the first antenna 50, the second antenna 60 and the third antenna 70 are perpendicular to each other, so that the correlation of the three-pole MIMO antenna is low, the MIMO effect can be better exerted, and the wireless capacity is improved.

[0121] Based on the antenna device provided in the above embodiment, the embodiment of the present disclosure further provides a home smart gateway, which includes a circuit board and an antenna device, the antenna device is electrically connected to the circuit board, and the antenna device is the antenna device described in the above embodiment. A three-polarized MIMO antenna is formed by adopting three linearly polarized antennas that are perpendicular to each other, and polarization diversity is used instead of spatial diversity, which reduces the space occupied by multiple antennas, reduces the correlation index of the MIMO antenna, and improves the receiving capability of signals with different polarizations.

[0122] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present disclosure, rather than to limit them. Although the present disclosure has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present disclosure.

Claims

1. An antenna device, characterized in that: include: The first printed board is arranged horizontally; A second printed board is stacked with the first printed board, and a ground layer is formed on the upper surface of the second printed board facing the first printed board; A third printed board is located between the first printed board and the second printed board, and the third printed board is in contact with and connected to the first printed board; a fourth printed board, located between the first printed board and the second printed board, the fourth printed board being arranged vertically to the first printed board; a first antenna, comprising a first radiating arm and a first feeding structure, wherein the first radiating arm is located on an upper surface of the first printed board, the first feeding structure is located on the third printed board, and the first radiating arm is electrically connected to the first feeding structure to generate horizontal polarization; a second antenna, which is not connected to the first antenna, and comprises a second radiating arm and a second feeding structure, wherein the second radiating arm is located on the upper surface of the first printed board, the second radiating arm and the first radiating arm are perpendicular to each other, the second feeding structure is located on the third printed board, and the second radiating arm is electrically connected to the second feeding structure to generate a horizontal polarization orthogonal to the first antenna; The third antenna is located on the fourth printed circuit board, and includes a third radiating arm and a feeding port. The third radiating arm is vertically arranged to the first printed circuit board, and the third radiating arm and the ground layer are respectively connected to the feeding port, so that the third antenna generates a vertical polarization orthogonal to the first antenna and the second antenna.

2. The antenna device according to claim 1, characterized in that The first radiation arm and the second radiation arm are symmetrically arranged relative to the diagonal axis of the first printed circuit board, and the first radiation arm is not connected to the second radiation arm; The central axis of the third printed board is arranged along the diagonal axis of the first printed board, and the first radiation arm is in contact with and connected to the second radiation arm and the third printed board.

3. The antenna device according to claim 1, characterized in that: An inclined plug hole is formed on the first printed board, the length direction of the plug hole is arranged parallel to the diagonal axis of the first printed board, and the plug hole passes through the first radiation arm and the second radiation arm; The third printed circuit board is inserted into the jack, and the third printed circuit board is arranged vertically to the first printed circuit board; the top surface of the third printed circuit board protrudes from the upper surface of the first printed circuit board, and a first feeding plate is arranged on the side of the third printed circuit board protruding from the first printed circuit board, and the first feeding plate is electrically connected to the first radiation arm and the first feeding structure respectively.

4. The antenna device according to claim 1, characterized in that: The first antenna has the same structure as the second antenna, and the first radiating arm includes: A first radiation branch arm is located on the upper surface of the first printed board, the first radiation branch arm is electrically connected to a first feeding plate on the surface of the third printed board, and the first feeding plate is electrically connected to one end of the first feeding structure through a via hole; The second radiation branch arm is located on the upper surface of the first printed board. The second radiation branch arm and the first radiation branch arm are located on different sides of the third printed board. The second radiation branch arm is electrically connected to the other end of the first feeding structure.

5. The antenna device according to claim 4, characterized in that: A first contact surface is formed at one end of the first radiation branch arm facing the second radiation branch arm, the first contact surface is inclined, and the first contact surface is electrically connected to the first feeding plate to transmit the radio frequency signal transmitted by the first feeding plate to the first radiation branch arm; A second contact surface is formed at one end of the second radiation branch arm facing the first radiation branch arm, and the second contact surface is electrically connected to the first feeding structure to transmit the radio frequency signal transmitted by the first feeding structure to the second radiation branch arm.

6. The antenna device according to claim 4, characterized in that: The first feeding structure comprises: A first strip line is located on a side of the third printed board facing the first radiation branch arm, and the first strip line is used to access a radio frequency signal; A first ground wire is located on the side of the third printed circuit board facing the second radiation arm, the first ground wire is coupled and connected to the first strip line, one end of the first ground wire is electrically connected to the second radiation arm, and the other end of the first ground wire is electrically connected to the first feeding plate through a via, and the first ground wire is used to transmit the radio frequency signal to the first radiation arm.

7. The antenna device according to claim 6, characterized in that: The first strip line comprises: A first microstrip line is arranged along the height direction of the third printed board, the first microstrip line is not connected to the first radiation branch arm, and the bottom end of the first microstrip line is used to access the radio frequency signal; A second microstrip line is arranged in parallel with the first microstrip line, the width of the second microstrip line is smaller than the width of the first microstrip line, the length of the second microstrip line is smaller than the length of the first microstrip line, and the bottom end of the second microstrip line is coupled to the first ground line; wherein the width is the diagonal direction of the first printed board, and the length is the thickness of the first printed board; One end of the connecting strip line is electrically connected to the top of the first microstrip line, and the other end of the connecting strip line is electrically connected to the top of the second microstrip line.

8. The antenna device according to claim 7, characterized in that: The first ground line comprises: a first grounding wire, arranged along the height direction of the third printed circuit board, the top end of the first grounding wire protruding from the upper surface of the first printed circuit board, and the first grounding wire being electrically connected to the first feeding sheet through a via hole; a second grounding line, arranged in parallel with the first grounding line, the bottom end of the second grounding line being coupled and connected with the bottom end of the second microstrip line, the top end of the second grounding line protruding from the upper surface of the first printed board, and the second grounding line being electrically connected with the second radiation branch arm; A connecting ground wire has one end electrically connected to the bottom end of the first ground wire, and the other end electrically connected to the bottom end of the second ground wire.

9. A home smart gateway, characterized in that: include: Circuit boards; An antenna device is electrically connected to the circuit board, wherein the antenna device is the antenna device according to any one of claims 1 to 8, and is used to generate and receive electromagnetic wave signals.

10. The home smart gateway according to claim 9, characterized in that: The antenna device comprises: The first printed board is arranged horizontally; A second printed board is arranged horizontally with the first printed board, and a first gap is formed between the second printed board and the second printed board; A third printed board is arranged perpendicularly to the first printed board, the width of the third printed board is not less than the first gap, and the central axis of the third printed board extends along the diagonal axis of the first printed board; The fourth printed board is arranged perpendicularly to the first printed board, the central axis of the fourth printed board extends along the diagonal axis of the first printed board, and there is a second gap between the fourth printed board and the third printed board, and the second gap is smaller than the diagonal dimension of the first printed board.

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