Antenna device and electronic equipment

Abstract

An embodiment of the present application provides an antenna device and an electronic device. The main radiating arm of the antenna device is configured to include an annular side wall and a top wall, and the annular side wall, the top wall, and the metal floor together enclose a radiating cavity with an opening on one side. In this way, when the feeding structure in the radiating cavity feeds a signal current to the main radiating arm, the electromagnetic waves in the radiating cavity are radiated to a greater extent through the opening on the annular side wall to the front of the screen of the electronic device. Due to the obstruction of the annular side wall, the electromagnetic waves radiated to other areas are effectively reduced, thereby improving the forward gain of the antenna device in the 2.4G WiFi band and other frequency bands, and reducing the directivity coefficient of the antenna device in the 2.4G WiFi band and other frequency bands.

Description

Technical Field

[0001] The embodiments of the present application relate to the technical field of electronic devices, and in particular to an antenna device and an electronic device. Background Art

[0002] Radio waves are used to transmit information in engineering systems such as radio communications, broadcasting and television, radar, and aviation and marine navigation. Antennas are essential components for transmitting and receiving radio waves in these systems. For example, to meet the growing demand for ultra-high-definition video, cloud gaming, VR experiences, and tele-education, televisions are equipped with 5G antennas capable of transmitting large amounts of data and boasting vast network capacity. These antennas receive and transmit signals, enabling information exchange with other devices.

[0003] Traditionally, a television set includes a television body and an antenna device, which is mounted on the back panel of the television body, near the bottom corner of the back panel. Currently, antenna devices are typically inverted F antennas (IFA) or planar inverted F antennas (PPIFA). The radiator of the IFA / PIFA antenna radiates electromagnetic waves in all directions, allowing some of the electromagnetic waves emitted by the antenna device to radiate from the sides of the television body to the front of the screen, thereby transmitting signals from the front of the screen.

[0004] However, traditional antenna equipment has an open structure, that is, the sides are open, which makes the directivity coefficient of the antenna equipment in the 2.4Gwifi frequency band high and the forward gain (the gain of electromagnetic waves radiated to the front of the screen) low, thereby affecting the performance of the front-screen antenna of electronic devices such as televisions. Summary of the Invention

[0005] The embodiments of the present application provide an antenna device and an electronic device, which can solve the problem that the antenna device in traditional electronic devices has a high directivity coefficient in the 2.4G WiFi frequency band and a low forward gain, thereby affecting the performance of the front-screen antenna of the electronic device.

[0006] An embodiment of the present application provides an antenna device for being fixed to a back panel of an electronic device. The antenna device includes a metal floor, a main radiating arm, and a feeding structure. The metal floor is used to be fixed to the back panel of the electronic device. The main radiating arm includes an annular side wall and a top wall. The top wall is arranged opposite to the metal floor. One end of the annular side wall is connected to the top wall, and the other end of the annular side wall is connected to the metal floor. The annular side wall has an opening, and the opening faces the edge of the back panel of the electronic device. The feeding structure is located in a radiating cavity enclosed by the main radiating arm and the metal floor. The feeding structure is used to feed signal current to the main radiating arm.

[0007] In the embodiment of the present application, the main radiating arm of the antenna device is configured to include an annular side wall and a top wall, and the annular side wall, the top wall, and the metal floor together enclose a radiating cavity with an opening on one side. In this way, when the feeding structure in the radiating cavity feeds a signal current to the main radiating arm, the electromagnetic waves in the radiating cavity are radiated to a greater extent through the opening on the annular side wall to the front of the screen of the electronic device. Due to the obstruction of the annular side wall, the electromagnetic waves radiated to other areas are effectively reduced, thereby improving the forward gain of the antenna device in the 2.4G WiFi band and other frequency bands, and reducing the directivity coefficient of the antenna device in the 2.4G WiFi band and other frequency bands. At the same time, by configuring the antenna device as a cavity structure with an opening on the side wall, multiple resonance points can be excited during the feeding process, thereby widening the bandwidth of the antenna device, enabling it to cover more frequency bands, and improving the antenna performance of the antenna device. In addition, since the antenna device of the embodiment of the present application is a cavity structure with an opening on the side wall, that is, the other areas except the opening are a closed structure, the distribution of the signal current is more concentrated than that of traditional antenna equipment, thereby reducing the interference of external environment interference sources such as horizontally polarized or vertically polarized antennas on the antenna device, facilitating the layout of the antenna device, and also avoiding interference with other antenna devices.

[0008] In an optional implementation, the feeding structure includes a first portion, a second portion, and a third portion connected in sequence, the second portion is disposed opposite to the metal floor, and the first portion and the third portion extend toward the metal floor at ends away from the second portion;

[0009] A feeding port is provided on the metal floor, one of the first part and the third part is connected to the feeding port, and the other of the first part and the third part is connected to the metal floor.

[0010] In the embodiment of the present application, the feeding structure is configured to be similar to an inverted "U"-shaped structure, so that one end of the feeding structure is connected to the feeding port and the other end is connected to the metal floor, which is beneficial to the impedance matching of the feeding structure, reduces the power loss in the feeding structure, effectively reduces the return loss of the antenna device of the embodiment of the present application, and improves the antenna gain.

[0011] In an optional implementation, a first gap is provided between the second portion and the top wall to implement gap-coupling feeding between the feeding structure and the main radiating arm.

[0012] In an optional implementation, the antenna device further includes a secondary radiation arm, which is disposed in the radiation cavity.

[0013] In the embodiment of the present application, a secondary radiating arm is provided in a radiating cavity enclosed by a main radiating arm and a metal floor, so that the signal current in the main radiating arm or the radiating cavity is fed to the secondary radiating arm, forming a signal current on the secondary radiating arm, and then radiating electromagnetic waves, so that the antenna device excites more resonance points, broadens the bandwidth of the entire antenna device, enables the antenna device to cover more frequency bands, and thus improves the utilization rate of the antenna device.

[0014] In an optional implementation, one end of the secondary radiating arm extends toward the metal floor and onto the metal floor, and a second gap is provided between the end of the secondary radiating arm toward the top wall and the top wall. The secondary radiating arm, the second gap and the top wall form a filtering structure, so that the secondary radiating arm couples and feeds in high-frequency signal current and filters out low-frequency signal current, thereby exciting a high-frequency electromagnetic wave signal through the secondary radiating arm.

[0015] Alternatively, there is a third gap between the end of the secondary radiation arm facing the metal floor and the metal floor, and the end of the secondary radiation arm facing the top wall extends to the top wall. The secondary radiation arm, the third gap and the metal floor together form a filtering structure, so that the secondary radiation arm couples and feeds high-frequency signal current, filters out low-frequency signal current, and thus excites high-frequency electromagnetic wave signals through the secondary radiation arm.

[0016] In an optional implementation, the annular side wall includes a first side wall, a second side wall, and a third side wall connected in sequence;

[0017] The first side wall and the third side wall are arranged opposite to each other, the second side wall is located between the first side wall and the third side wall, and the gap between the first side wall and the end of the third side wall away from the second side wall forms an opening. The first side wall, the second side wall and the third side wall are all configured into a planar structure.

[0018] In the embodiment of the present application, three planar side walls are connected in sequence to form an annular side wall, ensuring that the annular side wall, the top wall and the metal floor enclose a radiation cavity with one open side and five closed sides, so as to improve the forward gain of the 2.4G WiFi band and reduce the directivity coefficient of the antenna device in the 2.4G WiFi band. At the same time, the structure of the main radiation arm is simplified, thereby improving the manufacturing efficiency of the antenna device.

[0019] In an optional implementation, the feeding structure is located between the secondary radiating arm of the antenna device and the third sidewall of the annular sidewall, the distance between the secondary radiating arm and the third sidewall is 1 / 3 to 1 / 2 of the distance between the first sidewall and the third sidewall of the annular sidewall, and the distance between the feeding structure and the third sidewall is less than 1 / 3 of the distance between the first sidewall and the third sidewall.

[0020] Alternatively, the feeding structure is located between the secondary radiating arm and the first side wall, the distance between the secondary radiating arm and the first side wall is 1 / 3 to 1 / 2 of the distance between the first side wall and the third side wall, and the distance between the feeding structure and the first side wall is less than 1 / 3 of the distance between the first side wall and the third side wall.

[0021] The embodiment of the present application arranges the feeding structure and the secondary radiation arm at the above-mentioned set positions between the first side wall and the third side wall of the annular side wall, respectively, so that the antenna device excites four different radiation modes and generates four resonance points, covering 2.4GHz, 3.6GHz, 5GHz and 5.5GHz, so that the antenna device of the embodiment of the present application can not only be used to cover WiFi 2.4G and WiFi 5G, but also can be used in NR frequency bands, covering N41 frequency band, N78 frequency band and N79 frequency band.

[0022] In an optional implementation, the feeding structure is located between the secondary radiating arm of the antenna device and the third side wall of the annular side wall, the distance between the secondary radiating arm and the third side wall is 1 / 3 to 1 / 2 of the distance between the first side wall and the third side wall of the annular side wall, and the distance between the feeding structure and the third side wall is 1 / 3 to 1 / 2 of the distance between the first side wall and the third side wall;

[0023] Alternatively, the feeding structure is located between the secondary radiating arm and the first side wall, the distance between the secondary radiating arm and the first side wall is 1 / 3 to 1 / 2 of the distance between the first side wall and the third side wall, and the distance between the feeding structure and the first side wall is 1 / 3 to 1 / 2 of the distance between the first side wall and the third side wall.

[0024] In the embodiment of the present application, the feeding structure and the secondary radiation arm are respectively arranged at the above-mentioned set positions between the first side wall and the third side wall of the annular side wall, so that the antenna device excites five different radiation modes and generates five resonance points, covering 2.45GHz, 3.9GHz, 4.9GHz, 5.5GHz and 6.4GHz, so that the antenna device can not only be used to cover WiFi 2.4G and WiFi 5G, but also can be used in NR frequency bands, covering N41 frequency band, N78 frequency band and N79 frequency band, and can also be used in future sub 8G and WiFi 6, etc.

[0025] In an optional implementation, the side wall of the secondary radiation arm of the antenna device has an external thread, the top wall or the metal floor has an internal thread, and the secondary radiation arm is threadedly connected to the top wall or the metal floor.

[0026] In the embodiment of the present application, an external thread is provided on the secondary radiating arm, and an internal thread is provided on the top wall or metal floor of the antenna device. Thus, when the secondary radiating arm is threadedly connected to the top wall, the secondary radiating arm can be rotated to stably adjust the distance between the secondary radiating arm and the metal floor, thereby quickly adjusting the frequency band of the electromagnetic wave excited by the secondary radiating arm. Alternatively, when the secondary radiating arm is threadedly connected to the metal floor, the secondary radiating arm can be rotated to stably adjust the distance between the secondary radiating arm and the top wall, thereby quickly adjusting the frequency band of the electromagnetic wave excited by the secondary radiating arm. This not only facilitates the adjustment of the height of one end of the secondary radiating arm, but also simplifies the connection structure between the secondary radiating arm and the metal floor or the top wall, thereby improving the assembly efficiency of the entire antenna device. In addition, the connection strength between the secondary radiating arm and the metal floor or the secondary radiating arm and the top wall is also enhanced.

[0027] An embodiment of the present application further provides an electronic device, comprising an electronic device body and at least one antenna device as described above;

[0028] The antenna device is fixed on the back plate of the electronic device body, and the opening of the antenna device faces any side of the back plate.

[0029] The embodiment of the present application sets the above-mentioned antenna device on the back panel of the electronic device body, so that the electromagnetic waves radiated by the antenna device are radiated to a greater extent through the opening of the antenna device to the front of the screen of the electronic device, and the electromagnetic waves radiated to other areas are effectively reduced due to the obstruction of the annular side wall of the antenna device, thereby improving the forward gain of the antenna device in the 2.4G WiFi band and other frequency bands, and reducing the directivity coefficient of the antenna device in the 2.4G WiFi band and other frequency bands. In addition, by setting the antenna device as a cavity structure with an opening in the side wall, multiple resonance points can be excited during the feeding process, thereby widening the bandwidth of the antenna device, enabling it to cover more frequency bands, improving the antenna performance of the antenna device, and further optimizing the display performance and functional requirements of the electronic device.

[0030] In an optional implementation, the backplate is a metal backplate, which is configured as a metal floor of the antenna device to simplify the structure of the antenna device and the electronic device, thereby not only reducing the production cost of the electronic device, but also improving the assembly efficiency of the electronic device and reducing the weight of the electronic device.

[0031] In an optional implementation, the number of antenna devices is at least two, and the at least two antenna devices are respectively arranged on two adjacent side edges of the back plate.

[0032] In the embodiments of the present application, at least one antenna device is provided on each of two adjacent sides of the backplane. Thus, the two antenna devices can form a Wi-Fi MIMO layout, thereby enhancing the radiation intensity of the antenna device on the electronic device and broadening the coverage frequency band of the antenna device on the electronic device, thereby improving the signal transmission performance of the electronic device. Furthermore, because each antenna device has a cavity structure with an opening on one side, the isolation between the antenna devices is improved, thus preventing signal interference between the antennas. Furthermore, the far-field radiation patterns of the two antenna devices located on two adjacent sides are complementary, thus ensuring the continuity of the frequency band covered by the formed Wi-Fi MIMO antenna.

[0033] In an optional implementation, the horizontal distance between at least two antenna devices is at least 18 mm, and the vertical distance between at least two antenna devices is at least 27 mm, so as to further improve the isolation between the two antenna devices and ensure that there is no signal interference between the two antenna devices.

[0034] In an optional implementation, at least two antenna devices are spaced apart on at least one of two adjacent side edges.

[0035] By spacing multiple antenna devices on one side of the back panel, the present embodiment further enhances the radiation intensity of the antenna devices on the electronic device while effectively utilizing the space on the back panel. This also broadens the frequency band covered by the antenna devices on the electronic device. For example, some antenna devices can be used as Wi-Fi antennas to optimize signal transmission performance with a router, while others can be used as Bluetooth antennas to optimize signal transmission performance with a remote control. Furthermore, due to the structural characteristics of each antenna device, isolation between adjacent antenna devices is ensured, ensuring that the antenna devices do not interfere with each other. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1 This is a schematic diagram of the first structure of the electronic device provided in the embodiment of the present application;

[0037] Figure 2 yes Figure 1 A schematic diagram of the first structure of the antenna device;

[0038] Figure 3 yes Figure 2 The main view;

[0039] Figure 4 yes Figure 2 A top view of

[0040] Figure 5 yes Figure 2 The simulated far-field pattern of

[0041] Figure 6(a) is Figure 5 Directional pattern in the plane of phi = 90°;

[0042] Figure 6(b) is Figure 5 Directional pattern in the plane of theta = 90°;

[0043] Figure 7 yes Figure 3 Schematic diagram of part of the structure;

[0044] Figure 8 yes Figure 1 A second structural diagram of the antenna device;

[0045] Figure 9 yes Figure 8 The main view;

[0046] Figure 10 yes Figure 1 Schematic diagram of the third structure of the antenna device;

[0047] Figure 11 yes Figure 8 Antenna radiation effect diagram;

[0048] Figure 12(a) is Figure 11 Simulated electric field diagram with the mid-resonance point at 2.45 GHz;

[0049] Figure 12(b) is Figure 11 Simulated electric field diagram with the mid-resonance point at 3.6 GHz;

[0050] Figure 12(c) is Figure 11 Simulated electric field diagram with the mid-resonance point at 5 GHz;

[0051] Figure 12(d) is Figure 11 Simulated electric field diagram with the mid-resonance point at 5.5 GHz;

[0052] Figure 13(a) is Figure 1 Current distribution diagram of the antenna device during radiation;

[0053] FIG13( b ) is a diagram showing the current distribution of a conventional antenna device during radiation;

[0054] Figure 14 yes Figure 1 Schematic diagram of the structure of the interference source with horizontal polarization on the back panel of the electronic device;

[0055] Figure 15 yes Figure 14 The effect diagram of the antenna device after being interfered by a horizontally polarized interference source;

[0056] Figure 16 yes Figure 1 Schematic diagram of a structure with a vertically polarized interference source on the back panel of an electronic device;

[0057] Figure 17 yes Figure 16 The effect diagram of the antenna device after being interfered by a vertically polarized interference source;

[0058] Figure 18 yes Figure 1 A fourth structural diagram of the antenna device;

[0059] Figure 19 yes Figure 18 The main view;

[0060] Figure 20 yes Figure 18 Antenna radiation effect diagram;

[0061] Figure 21(a) is Figure 20 Simulated electric field diagram with the mid-resonance point at 2.45 GHz;

[0062] Figure 21(b) is Figure 20 Simulated electric field diagram with the mid-resonance point at 3.9 GHz;

[0063] Figure 21(c) is Figure 20 Simulated electric field diagram with the mid-resonance point at 4.9 GHz;

[0064] Figure 21(d) is Figure 20 Simulated electric field diagram with the mid-resonance point at 5.5 GHz;

[0065] Figure 21(e) is Figure 20 Simulated electric field diagram with the mid-resonance point at 6.4 GHz;

[0066] Figure 22 yes Figure 1 Schematic diagram of the structure where the middle antenna device is located outside the two bases;

[0067] Figure 23 yes Figure 22 Antenna radiation effect diagram when the antenna device is located at different positions;

[0068] Figure 24 yes Figure 1 Schematic diagram of the structure in which the antenna device is located between two bases;

[0069] Figure 25 This is a schematic diagram of the second structure of the electronic device provided in an embodiment of the present application;

[0070] Figure 26 yes Figure 25 Antenna radiation effect diagram of the two antenna devices;

[0071] Figure 27 yes Figure 25 The simulated far-field pattern of the first antenna device in ;

[0072] Figure 28 yes Figure 25 Simulated far-field pattern of the second antenna device;

[0073] Figure 29 This is a third structural diagram of the electronic device provided in the embodiment of the present application;

[0074] Figure 30 yes Figure 29 Antenna radiation effect diagram of the three antenna devices.

[0075] Description of reference numerals:

[0076] 10-Electronic equipment;

[0077] 1-antenna device; 100-electronic device body; 200-antenna device;

[0078] 110 - backplane; 120 - base; 210 - metal floor; 220 - main radiating arm; 230 - feeding structure; 240 - feeding port; 250 - secondary radiating arm; 260 - first interference source; 270 - second interference source; 201 - first antenna assembly; 202 - second antenna assembly; 203 - third antenna assembly;

[0079] 121 - first base; 122 - second base; 221 - annular side wall; 222 - top wall; 223 - radiation cavity; 224 - opening; 225 - first gap; 226 - second gap; 227 - third gap; 231 - first portion; 232 - second portion; 233 - third portion;

[0080] 2211-first side wall; 2212-second side wall; 2213-third side wall. DETAILED DESCRIPTION

[0081] The terms used in the implementation section of this application are only used to explain the specific embodiments of this application and are not intended to limit this application.

[0082] Figure 1 This is a schematic diagram of the first structure of the electronic device provided in the embodiment of the present application. Figure 1 As shown, usually, an electronic device such as a television is provided with an antenna device, through which signals are sent or received to achieve information transmission with a router, a remote controller and other remote devices.

[0083] Taking televisions as an example, with the development of 5G communication systems, 5G antenna equipment can be used on large-screen TVs. For example, 5G antenna equipment with the characteristics of being able to complete large data transmission and ultra-large network capacity is installed on the TV to receive or send signals, thereby realizing information transmission between other devices, etc., thereby meeting people's needs for ultra-high-definition video, cloud games, VR experience, TV distance education, etc.

[0084] Traditionally, a large-screen TV includes a TV body and an antenna device, which is mounted on the back panel of the TV body, near the bottom corner of the back panel. Currently, the antenna device is typically an inverted F antenna (IFA) or a planar inverted F antenna (PPIFA). The radiator of the IFA / PIFA antenna radiates electromagnetic waves in all directions, allowing some of the electromagnetic waves emitted by the antenna device to radiate from the sides of the TV body to the front of the TV screen, thereby transmitting signals from the front of the screen.

[0085] Taking the IFA antenna as an example, it includes a metal floor and a radiator, which are arranged relative to each other along the thickness of the TV body. The metal floor is installed on the back panel of the TV body. Typically, the back panel of the TV body directly serves as the metal floor of the IFA antenna. A feed structure, a ground short-circuit leg, and a parasitic structure are arranged between the metal floor and the radiator. The feed structure is installed at one end of the radiator, and one end of the feed structure is connected to the radiator. The other end is electrically connected to the signal transmission source in the TV body through the feed port on the metal floor. In this way, the signal transmission source feeds the signal current into the antenna radiator through the feed port and the feed structure. The antenna radiator then transmits the signal current to the receiving end in the form of electromagnetic waves.

[0086] The two ends of the grounded short-circuit leg are connected to the radiator and the metal floor respectively. The bottom of the parasitic structure is connected to the metal floor. There is a certain gap between the top of the parasitic structure and the radiator. In this way, the radiator feeds the signal current to the parasitic structure through gap coupling feeding, and the parasitic structure then emits the signal current in the form of electromagnetic waves, thereby broadening the bandwidth of the IFA antenna.

[0087] Based on the above, it can be seen that traditional antenna equipment such as IFA antennas are open structures, that is, there are opening structures between the radiator and the metal floor, and there is no side shielding. The electromagnetic waves stimulated by the radiator and the parasitic structure are evenly radiated from the periphery of the IFA antenna, making the 2.4Gwifi frequency band directivity coefficient of the antenna device relatively high, and only part of the electromagnetic waves are radiated from the side of the TV to the front of the screen, reducing the forward gain, thereby affecting the front-screen antenna performance of electronic devices such as TVs. Among them, the 2.4Gwifi frequency band directivity coefficient of traditional antenna equipment is 7.1dBi, and the forward gain is -2.4dBi. It should be noted that the forward gain refers to the electromagnetic wave gain radiated by the antenna to the front of the screen of a large-screen TV.

[0088] An embodiment of the present application provides an antenna device and an electronic device, wherein the main radiating arm of the antenna device is configured to include an annular side wall and a top wall, and the annular side wall, the top wall, and the metal floor together enclose a radiating cavity with an opening on one side. In this way, when the feeding structure in the radiating cavity feeds a signal current to the main radiating arm, the electromagnetic waves in the radiating cavity are radiated to a greater extent through the opening on the annular side wall to the front of the screen of the electronic device, and due to the obstruction of the annular side wall, the electromagnetic waves radiated to other areas are effectively reduced, thereby improving the forward gain of the antenna device in the 2.4G WiFi band and other frequency bands, and reducing the directivity coefficient of the antenna device in the 2.4G WiFi band and other frequency bands.

[0089] The structures of the antenna device and the electronic device according to the present application are described in detail below through three embodiments.

[0090] Example 1

[0091] Figure 2 yes Figure 1 The first structural diagram of the antenna device is shown in FIG. Figure 3 yes Figure 2 The main view of the Figure 2 and Figure 3 As shown, an embodiment of the present application provides an antenna device 200, which is fixed to the back panel 110 of the electronic device 10. It is understood that the electronic device 10 includes an electronic device body 100, the back panel 110 of the electronic device 10 and the screen of the electronic device 10 are respectively arranged on two side surfaces of the electronic device body 100 along the thickness direction, and the antenna device 200 is fixed to the back panel 110 of the electronic device body 100.

[0092] It should be noted that the electronic device 10 of the embodiment of the present application may include but is not limited to a television, a mobile phone, a tablet computer, a laptop computer, an ultra-mobile personal computer (UMPC), a handheld computer, a walkie-talkie, a netbook, a POS machine, a personal digital assistant (PDA), a wearable device, a virtual reality device, and other mobile or fixed terminals with an antenna device 200 and a screen.

[0093] The present application embodiment will be described using a television as an example. In practice, the television body includes multiple bases 120 spaced apart at the bottom of a back panel 110. The bases 120 securely fasten the television to a fixed surface such as a wall. The antenna device 200 of the present application embodiment can be fixed to the back panel 110.

[0094] For example, the antenna assembly 200 can be fixed to any side of the back panel 110. This shortens the path of electromagnetic waves emitted by the antenna assembly 200 to the front of the television screen, reduces the loss of the antenna assembly 200 along the radiation path, thereby improving the forward gain of the antenna assembly 200 and optimizing the front-screen antenna performance of the television. For example, the antenna assembly 200 can be fixed to one of the sides of the back panel 110 away from the base 120, or to one of the sides of the back panel 110 close to the base 120. The embodiment of the present application does not specifically limit the location of the antenna assembly 200.

[0095] Reference Figure 2 and Figure 3 As shown, the antenna device 200 of the embodiment of the present application includes a metal floor 210, a main radiating arm 220 and a feeding structure 230. The metal floor 210 is fixed to the back plate 110 of the electronic device 10, and the main radiating arm 220 includes an annular side wall 221 and a top wall 222. The top wall 222 is arranged opposite to the metal floor 210. In other words, the top wall 222 is located on the side of the metal floor 210 away from the back plate 110. One end of the annular side wall 221 is connected to the top wall 222, and the other end of the annular side wall 221 is connected to the metal floor 210. In other words, the annular side wall 221 is located between the top wall 222 and the metal floor 210, and the annular side wall 221 is arranged along the height direction (such as Figure 2 The two ends of the main radiating arm 220 (as shown in the y direction) are respectively connected to the top wall 222 and the metal floor 210. In this way, the annular side wall 221, the top wall 222 and the metal floor 210 of the main radiating arm 220 form a cavity structure, which is the radiating cavity 223 of the antenna device 200.

[0096] The annular side wall 221 can be detachably fixed to the metal floor 210 by screws or clamping to ensure electrical connection between the annular side wall 221 and the metal floor 210, while facilitating separate replacement of the annular side wall 221 and the metal floor 210.

[0097] Reference Figure 2 As shown, the annular side wall 221 has an opening 224. For example, one or more strip-shaped gaps can be set on the side surface of the annular side wall 221 facing the edge of the back plate 110, and the strip-shaped gaps can be used as the opening 224. Alternatively, a through hole in a circular or square shape can be opened on the side surface of the annular side wall 221 facing the edge of the back plate 110, and the through hole can be used as the opening 224.

[0098] Thus, the antenna device 200 is formed into a structure with a partially open side and a closed structure. When the antenna device 200 is mounted on the back panel 110 of an electronic device 10, such as a television, the opening 224 faces the edge of the television back panel 110. For example, when the antenna device 200 is located at a first edge of the back panel 110, the opening 224 of the annular sidewall 221 faces the first edge. In this way, the electromagnetic waves within the radiation cavity 223 are radiated from the edge of the back panel 110 to the front of the television screen through the opening 224.

[0099] It is understandable that the opening 224 can be one or more, and can be adjusted according to actual needs.

[0100] The annular side wall 221 of the embodiment of the present application may be a curved side wall arranged around one axis perpendicular to the metal floor 210 , so that the annular side wall 221 has a cylindrical structure.

[0101] Figure 4 yes Figure 2 Refer to the top view of Figure 4 As shown, in some examples, the annular side wall 221 may also include a first side wall 2211, a second side wall 2212 and a third side wall 2213 connected in sequence, the first side wall 2211 and the third side wall 2213 are arranged opposite to each other, the second side wall 2212 is located between the first side wall 2211 and the third side wall 2213, and the gap between the first side wall 2211 and the end of the third side wall 2213 away from the second side wall 2212 forms an opening 224, and the first side wall 2211, the second side wall 2212 and the third side wall 2213 are all configured as a planar structure.

[0102] In the embodiment of the present application, three planar side walls are sequentially connected to form an annular side wall 221. While ensuring that the annular side wall 221, the top wall 222 and the metal floor 210 enclose a radiation cavity 223 with one open side and five closed sides, so as to improve the forward gain of the 2.4G WiFi band and reduce the directivity coefficient of the antenna device 200 in the 2.4G WiFi band, the structure of the main radiation arm 220 is simplified, thereby improving the manufacturing efficiency of the antenna device 200.

[0103] It is understandable that the main radiation arm 220 in the embodiment of the present application can be made of metal such as copper and aluminum to ensure the passage of current.

[0104] In the embodiment of the present application, the feeding structure 230 is located in the radiation cavity 223 enclosed by the main radiation arm 220 and the metal floor 210 . The feeding structure 230 is used to feed signal current to the main radiation arm 220 .

[0105] For example, refer to Figure 3 As shown, a feeding port 240 is formed on the metal floor 210, one end of the feeding port 240 is electrically connected to a signal transmitting source (not shown) inside the electronic device 10, one end of the feeding structure 230 is connected to the feeding port 240, and the other end can be connected to the main radiating arm 220, such as the top wall 222. In this way, the signal transmitting source can feed the signal current into the main radiating arm 220 through the feeding port 240 and the feeding structure 230, so that the main radiating arm 220 generates electromagnetic waves. At the same time, the signal current on the main radiating arm 220 will also excite the radiation cavity 223 to generate electromagnetic waves.

[0106] When configuring the feed port 240, a mounting hole can be formed in the metal floor 210. One end of the feed port 240 is electrically connected to the feed structure 230, while the other end passes through the mounting hole and is electrically connected to a signal transmission source within the electronic device 10, such as a television. The specific structure of the feed port 240 can be directly referenced to the feed port on a conventional antenna structure and will not be further described here.

[0107] Because the annular side wall 221, top wall 222 and metal floor 210 of the embodiment of the present application jointly enclose a radiation cavity 223 with an opening 224 on one side, that is, one side of the radiation cavity 223 is open and the rest is closed. In this way, when the feeding structure 230 in the radiation cavity 223 feeds the signal current to the main radiation arm 220, the electromagnetic waves in the main radiation arm 220 and the radiation cavity 223 are radiated to a greater extent through the opening 224 on the annular side wall 221, and then radiated to the front of the TV screen through the side of the TV. Due to the obstruction of the annular side wall 221, the electromagnetic waves radiated to other areas are effectively reduced, thereby improving the forward gain of the antenna device 200 in the 2.4Gwifi band and other frequency bands, and reducing the directivity coefficient of the antenna device 200 in the 2.4Gwifi band and other frequency bands.

[0108] Figure 5 yes Figure 2 Reference Figure 5 As shown, the maximum direction of the antenna device 200 during the radiation process is on the horizontal plane (such as Figure 5 The xy plane is in the middle), and simulation experiments show that the directivity coefficient of the antenna device 200 of the embodiment of the present application is 5.9 dBi, which is 1.2 dBi better than that of the traditional antenna device.

[0109] Figure 6(a) is Figure 5 In the plane pattern of phi = 90°, Figure 6(b) is Figure 5 Planar radiation pattern at theta=90°. Referring to Figures 6(a) and 6(b), the curve at point a is the plane radiation curve of a traditional antenna device, and the curve at point b is the plane radiation curve of the antenna device 200 according to an embodiment of the present application. Referring to Figure 6(a), the forward gain at point a is -2.418dB, and the forward gain at point b is 0.9796dB, indicating that the antenna device 200 according to an embodiment of the present application is optimized by 3.3976dB compared with the traditional technology. Referring to Figure 6(b), the forward gain at point a is -2.393dB, and the forward gain at point b is 0.9476dB, indicating that the antenna device 200 according to an embodiment of the present application is optimized by 3.34dB compared with the traditional technology.

[0110] At the same time, by setting the antenna device 200 as a cavity structure with an opening 224 on the side wall, multiple resonance points can be excited during the feeding process, thereby widening the bandwidth of the antenna device 200, enabling it to cover more frequency bands and improving the antenna performance of the antenna device 200.

[0111] In specific configuration, the feeding structure 230 in the embodiment of the present application may be a feeding line or a feeding metal member.

[0112] Figure 7 yes Figure 3 Schematic diagram of part of the structure. Figure 7 As shown, when the feeding structure 230 is a feeding metal member, the feeding structure 230 can be an inverted "U" structure. For example, the feeding structure 230 can include a first part 231, a second part 232 and a third part 233 connected in sequence, the second part 232 is arranged opposite to the metal floor 210, and the first part 231 and the third part 233 extend toward the metal floor 210 from one end of the second part 232.

[0113] The metal floor 210 has a feeding port 240. One of the first portion 231 and the third portion 233 is connected to the feeding port 240, and the other of the first portion 231 and the third portion 233 is connected to the metal floor 210. For example, the end of the first portion 231 away from the second portion 232 is connected to the feeding port 240, so that one end of the first portion 231 is electrically connected to the signal transmission source through the feeding port 240, thereby feeding the signal current into the feeding structure 230 through the feeding structure 230, and then feeding the signal current into the main radiating arm 220. The end of the third portion 233 away from the second portion 232 is connected to the metal floor 210 to ground the feeding structure 230. For example, the third portion 233 can be fixed to the metal floor 210 by means of a clip or screw connection.

[0114] In which, there is a first gap 225 between the second part 232 and the top wall 222 of the main radiating arm 220. In this way, the signal current on the second part 232 can be fed into the top wall 222 of the main radiating arm 220 by breaking through the first gap 225, thereby flowing in the entire main radiating arm 220 and the radiation cavity 223, realizing gap coupling feeding between the feeding structure 230 and the main radiating arm 220.

[0115] Of course, the second portion 232 can also be directly attached to the top wall 222 of the main radiating arm 220 , so that the signal current on the second portion 232 is directly fed to the top wall 222 of the main radiating arm 220 , thereby flowing in the entire main radiating arm 220 and the radiation cavity 223 .

[0116] In the embodiment of the present application, the feeding structure 230 is configured to be an inverted "U"-shaped structure, so that one end of the feeding structure 230 is connected to the feeding port 240 and the other end is connected to the metal floor 210. This is beneficial to the impedance matching of the feeding structure 230, reduces the power loss in the feeding structure 230, effectively reduces the return loss of the antenna device 200 in the embodiment of the present application, and improves the antenna gain.

[0117] In other examples, the feed structure 230 may be in an “L” shape, for example, Figure 7As shown, the feeding structure 230 may only include a first portion 231 and a second portion 232 connected in sequence. The first portion 231 extends toward the metal floor 210, and the second portion 232 is located at an end of the first portion 231 near the top wall 222. The second portion 232 and the first portion 231 form a certain angle, for example, the angle between the second portion 232 and the first portion 231 is 90°. A gap is provided between the second portion 232 and the top wall 222. The end of the first portion 231 away from the second portion 232 is connected to the feeding port 240 on the metal floor 210 to ensure that the signal current is fed into the feeding structure 230. At the same time, the signal current on the second portion 232 is fed to the top wall 222 through gap feeding.

[0118] In addition, the feeding structure 230 can also be a direct feeding plus capacitor structure, etc. Its specific structure and feeding distance can directly refer to traditional technology and will not be described in detail here.

[0119] Figure 8 yes Figure 1 The second structural diagram of the antenna device is shown in FIG. Figure 9 yes Figure 8 The main view of the Figure 8 and Figure 9 As shown, the antenna device 200 according to the embodiment of the present application may further include a secondary radiation arm 250 , which is disposed in the radiation cavity 223 .

[0120] Reference Figure 8 and Figure 9 As shown, in a specific configuration, one end of the secondary radiating arm 250 facing the metal floor 210 can extend onto the metal floor 210, and a second gap 226 is defined between the end of the secondary radiating arm 250 facing the top wall 222 and the top wall 222. For example, the bottom of the secondary radiating arm 250 is fixed to the metal floor 210, and the second gap 226 is defined between the top of the secondary radiating arm 250 and the top wall 222. In this way, the signal current on the top wall 222 can be fed into the secondary radiating arm 250 through the second gap 226, so that a signal current is formed on the secondary radiating arm 250, thereby radiating electromagnetic waves, thereby enabling the antenna device 200 to excite more resonance points, broadening the bandwidth of the entire antenna device 200, and enabling the antenna device 200 to cover more frequency bands, thereby improving the utilization rate of the antenna device 200.

[0121] Furthermore, when the end of the secondary radiating arm 250 facing the metal floor 210 can extend onto the metal floor 210, and a second gap 226 is defined between the end of the secondary radiating arm 250 facing the top wall 222 and the top wall 222, the secondary radiating arm 250, the second gap 226, and the top wall 222 form a filtering structure, such that the secondary radiating arm 250 couples and feeds in high-frequency signal currents and filters out low-frequency signal currents, thereby exciting high-frequency electromagnetic wave signals through the secondary radiating arm 250. The smaller the spacing of the second gap 226, the larger the projected area of ​​the secondary radiating arm 250 on the top wall 222, and the higher the frequency band of the signal current coupled and fed in by the secondary radiating arm 250.

[0122] It is understandable that the filtering principle of the filtering structure can be directly referred to traditional antenna technology, and will not be described in detail here.

[0123] Figure 10 yes Figure 1 The third structural diagram of the antenna device is shown in Figure 2. Figure 10 As shown, in some examples, one end of the secondary radiating arm 250 facing the top wall 222 can extend onto the top wall 222, and a third gap 227 is provided between the end of the secondary radiating arm 250 facing the metal floor 210 and the metal floor 210. In this way, the signal current on the metal floor 210 can be fed to the secondary radiating arm 250 through the third gap 227, so that a signal current is formed on the secondary radiating arm 250, and electromagnetic waves are radiated, so that the antenna device 200 excites more resonance points.

[0124] At the same time, the secondary radiating arm 250, the third gap 227, and the metal floor 210 collectively form a filtering structure, allowing the secondary radiating arm 250 to couple the high-frequency signal current fed into it and filter out the low-frequency signal current, thereby exciting a high-frequency electromagnetic wave signal through the secondary radiating arm 250. It will be appreciated that the smaller the spacing of the third gap 227, the larger the projected area of ​​the secondary radiating arm 250 onto the metal floor 210, and the higher the frequency band of the signal current coupled into it by the secondary radiating arm 250.

[0125] Of course, in other examples, the secondary radiating arm 250 can be suspended between the top wall 222 and the metal floor 210, that is, there is a gap between the top of the secondary radiating arm 250 and the top wall 222, and there is also a gap between the bottom of the secondary radiating arm 250 and the metal floor 210. In this way, not only is the signal current on the main radiating arm 220 fed into the secondary radiating arm 250 through gap feeding, but the antenna device 200 also forms two filtering structures, so that the secondary radiating arm 250 can effectively filter out the signal current in the low frequency band and feed in the signal current in the high frequency band.

[0126] It is understandable that the auxiliary radiating arm 250 may be spaced apart from the second sidewall 2212 of the annular sidewall 221. Of course, the auxiliary radiating arm 250 may also contact the second sidewall 2212 of the annular sidewall 221, which is not limited in this embodiment of the present application.

[0127] When specifically configured, the secondary radiation arm 250 may be a metal block, which may be fixed to the metal floor 210 or the top wall 222 by means of a clamping connection or a screw connection.

[0128] In some examples, the side wall of the secondary radiating arm 250 has an external thread, and the top wall 222 or the metal floor 210 has an internal thread, so that the secondary radiating arm 250 is threadedly connected to the top wall 222 or the metal floor 210. That is, when the secondary radiating arm 250 is assembled with the top wall 222, the secondary radiating arm 250 can be threadedly connected to the top wall 222, and when the secondary radiating arm 250 is assembled with the metal floor 210, the secondary radiating arm 250 can be threadedly connected to the metal floor 210. For example, the secondary radiating arm 250 can be a screw or a bolt, and the metal floor 210 or the top wall 222 has a threaded hole.

[0129] In the embodiment of the present application, an external thread is provided on the secondary radiating arm 250 and an internal thread is provided on the top wall 222 or the metal floor 210 of the antenna device 200. In this way, when the secondary radiating arm 250 is threadedly connected to the top wall 222, the secondary radiating arm 250 can be rotated to stably adjust the distance between the secondary radiating arm 250 and the metal floor 210, that is, to stably adjust the width of the third gap 227, thereby quickly adjusting the frequency band of the electromagnetic wave excited by the secondary radiating arm 250.

[0130] When the secondary radiating arm 250 is threadedly connected to the metal floor 210, the distance between the secondary radiating arm 250 and the top wall 222 can be stably adjusted by rotating the secondary radiating arm 250, that is, the width of the second gap 226 can be stably adjusted, so as to quickly adjust the frequency band of the electromagnetic wave excited by the secondary radiating arm 250. This not only facilitates the adjustment of the height of one end of the secondary radiating arm 250, but also simplifies the connection structure between the secondary radiating arm 250 and the metal floor 210 or the top wall 222, thereby improving the assembly efficiency of the entire antenna device 200.

[0131] It should be noted that the width of the second gap 226 refers to the distance between the end of the auxiliary radiating arm 250 facing the top wall 222 and the top wall 222. Correspondingly, the width of the third gap 227 refers to the distance between the end of the auxiliary radiating arm 250 facing the metal floor 210 and the metal floor 210.

[0132] Reference Figure 8 and Figure 9As shown, in the embodiment of the present application, the feeding structure 230 can be located between the secondary radiating arm 250 and the third side wall 2213 of the annular side wall 221, that is, the feeding structure 230 is arranged close to the third side wall 2213, and the secondary radiating arm 250 is located on the side of the feeding structure 230 away from the third side wall 2213.

[0133] Of course, the feeding structure 230 can also be located between the secondary radiating arm 250 and the first side wall 2211 of the annular side wall 221 (not shown in the figure), that is, the feeding structure 230 is arranged close to the first side wall 2211, and the secondary radiating arm 250 is located on the side of the feeding structure 230 away from the first side wall 2211.

[0134] In which, when the feeding structure 230 can be located between the secondary radiating arm 250 and the third side wall 2213 of the annular side wall 221, the distance between the secondary radiating arm 250 and the third side wall 2213 is 1 / 3 to 1 / 2 of the distance between the first side wall 2211 and the third side wall 2213 of the annular side wall 221, and the distance between the feeding structure 230 and the third side wall 2213 is less than 1 / 3 of the distance between the first side wall 2211 and the third side wall 2213.

[0135] For example, the distance between the secondary radiating arm 250 and the third side wall 2213 is 1 / 2, 2 / 5 or 1 / 3 of the distance between the first side wall 2211 and the third side wall 2213 of the annular side wall 221, that is, the secondary radiating arm 250 is located at 1 / 2, 2 / 5 or 1 / 3 of the distance between the first side wall 2211 and the third side wall 2213, and the distance between the feeding structure 230 and the third side wall 2213 is 1 / 4, 1 / 5 or 1 / 6 of the distance between the first side wall 2211 and the third side wall 2213, that is, the feeding structure 230 is located at 1 / 4, 1 / 5 or 1 / 6 of the distance between the first side wall 2211 and the third side wall 2213. Exemplarily, the secondary radiation arm 250 is located at 1 / 2 between the first side wall 2211 and the third side wall 2213 , and the feeding structure 230 is located at 1 / 4 between the first side wall 2211 and the third side wall 2213 .

[0136] Correspondingly, when the feeding structure 230 is located between the secondary radiating arm 250 and the first side wall 2211, the distance between the secondary radiating arm 250 and the first side wall 2211 is 1 / 3 to 1 / 2 of the distance between the first side wall 2211 and the third side wall 2213, and the distance between the feeding structure 230 and the first side wall 2211 is less than 1 / 3 of the distance between the first side wall 2211 and the third side wall 2213.

[0137] For example, the distance between the secondary radiation arm 250 and the first side wall 2211 is 1 / 2, 2 / 5 or 1 / 3 of the distance between the first side wall 2211 and the first side wall 2211 of the annular side wall 221, that is, the secondary radiation arm 250 is located at 1 / 2, 2 / 5 or 1 / 3 of the distance between the first side wall 2211 and the first side wall 2211, and the distance between the feeding structure 230 and the first side wall 2211 is 1 / 4, 1 / 5 or 1 / 6 of the distance between the first side wall 2211 and the first side wall 2211, that is, the feeding structure 230 is located at 1 / 4, 1 / 5 or 1 / 6 of the distance between the first side wall 2211 and the first side wall 2211. Exemplarily, the secondary radiation arm 250 is located at 1 / 2 between the first side walls 2211 and 2211 , and the feeding structure 230 is located at 1 / 4 between the first side walls 2211 and 2211 .

[0138] Figure 11 yes Figure 8 Antenna radiation effect diagram. Figure 11 As shown, curve q1 is the S11 parameter curve of the antenna device 200 according to the embodiment of the present application. Figure 11 As can be seen above, the antenna device 200 of the present embodiment has four resonance points, including resonance point c, resonance point d, resonance point e, and resonance point f. The frequency of resonance point c is 2.45 GHz, the frequency of resonance point d is 3.6 GHz, the frequency of resonance point e is 5 GHz, and the frequency of resonance point f is 5.5 GHz.

[0139] Figure 12(a) is Figure 11 The simulated electric field diagram with the mid-resonance point at 2.45 GHz is shown in Figure 12(b). Figure 11 The simulated electric field diagram with the mid-resonance point at 3.6 GHz is shown in Figure 12(c). Figure 11 The simulated electric field diagram with the resonance point at 5 GHz is shown in Figure 12(d). Figure 11 The simulated electric field diagram with the mid-resonance point at 5.5GHz. Figure 12(a) to Figure 12(d) As shown, the antenna device 200 of the embodiment of the present application excites four radiation modes during the antenna radiation process. Figure 12(a) to Figure 12(d) In FIG, arrow R represents the direction of current flow.

[0140] 12( a ), the antenna device 200 excites the TE10 mode at the open end of the cavity during the radiation process. In this mode, the currents in the entire open end of the cavity, i.e., region A, are in the same direction and all flow toward the top wall 222 , and a current zero point appears in this region. The TE10 mode at the open end of the cavity forms a resonance point c, i.e., the TE10 mode at the open end of the cavity forms a 2.45 GHz frequency band.

[0141] As shown in Figure 12(b), the antenna device 200 excites the TE20 mode on the open side of the cavity during the radiation process. In this mode, in area B on the open side of the cavity, the current flows toward the metal floor 210, and in area C on the open side of the cavity, the current flows toward the top wall 222, and current zero points appear in areas B and C. The TE20 mode at the open end of the cavity forms a resonance point d, that is, the TE20 mode at the open end of the cavity forms a 3.6 GHz frequency band.

[0142] As shown in FIG12( c ), during the radiation process, the antenna device 200 excites a TE20 mode fed to the first side wall 2211. In this mode, two separated regions are formed near the first side wall 2211, namely, region E and region F. In region E, current flows toward the top wall 222, and in region F, current flows toward the metal floor 210. Current zero points appear in regions E and F, and the TE20 mode fed to the first side wall 2211 forms a resonance point e. In other words, the TE20 mode fed to the first side wall 2211 forms a 5 GHz frequency band.

[0143] 12( d ), during the radiation process, the antenna device 200 excites a TE10 mode fed to the secondary radiating arm 250. In this mode, in a region G near the secondary radiating arm 250, current flows toward the metal floor 210, and a current zero point appears in the region G. The TE10 mode fed to the secondary radiating arm 250 forms a resonance point f, that is, the TE10 mode fed to the secondary radiating arm 250 forms a 5.5 GHz frequency band.

[0144] Based on the above, it can be seen that the embodiment of the present application arranges the feeding structure 230 and the secondary radiation arm 250 respectively at the above-mentioned set position between the first side wall 2211 and the third side wall 2213 of the annular side wall 221, so that the antenna device 200 excites four different radiation modes and generates four resonance points, covering 2.45GHz, 3.6GHz, 5GHz and 5.5GHz, so that the antenna device of the embodiment of the present application can not only be used to cover WiFi 2.4G and WiFi 5G, but also can be applied to NR bands, covering N41 band, N78 band and N79 band. Among them, the frequency ranges of N41 band, N78 band and N79 band can be directly queried in existing data and will not be repeated here.

[0145] Figure 13(a) is Figure 1FIG13(b) is a current distribution diagram of the antenna device during the radiation process, and FIG13(b) is a current distribution diagram of the traditional antenna device during the radiation process. Referring to FIG13(a), since the antenna device 200 of the embodiment of the present application is a cavity structure with an opening 224 on the side wall, that is, the other areas except the opening 224 are closed structures, the distribution of the signal current of the antenna device 200 is relatively concentrated. Referring to FIG13(b), since the side of the traditional antenna device 1 is a completely open structure, the distribution of the signal current of the antenna device 1 is relatively dispersed. Among them, in FIG13(a) and FIG13(b), the ripple p represents the signal current.

[0146] Based on the above, it can be seen that the distribution of the signal current of the antenna device 200 of the embodiment of the present application is more concentrated than that of the traditional antenna device 1, thereby avoiding interference with the signals of other devices of the television, such as other antennas. In addition, interference with the antenna device 200 from external interference sources such as horizontally polarized or vertically polarized antennas is reduced.

[0147] Figure 14 yes Figure 1 Schematic diagram of the structure of the interference source with horizontal polarization on the back panel of the electronic device. Figure 15 yes Figure 14 The effect diagram of the antenna device being interfered by a horizontally polarized interference source. Figure 14 As shown, in order to verify the degree of interference of external environment interference sources such as horizontally polarized antennas on the antenna device 200 of the embodiment of the present application, a horizontally polarized interference source, namely a first interference source 260, is provided on the back panel 110 of the electronic device 10, such as a television, and the first interference source 260 radiates electromagnetic waves to the periphery.

[0148] Reference Figure 15As shown, curve r1 is an S11 parameter curve of a conventional antenna device after being interfered by the first interference source 260 , and curve s1 is an S11 parameter curve of the antenna device 200 according to an embodiment of the present application after being interfered by the first interference source 260 . It can be seen that the return loss of the resonance point g with a frequency of 2.4 GHz on the curve r1 is -29.19 dB, the return loss of the resonance point i with a frequency of 2.4 GHz on the curve s1 is -34.765 dB, the return loss of the resonance point h with a frequency of 5.5 GHz on the curve r1 is -31.747 dB, and the return loss of the resonance point j with a frequency of 5.5 GHz on the curve s1 is -39.283 dB. Excluding the influence of polarization on different antenna devices, at the resonance point of the same frequency, the antenna device 200 of the embodiment of the present application has a return loss that is 7 dB smaller than that of the traditional antenna device, that is, when the distance between the first interference source 260 and the antenna device 200 of the embodiment of the present application is equal to the distance between the first interference source 260 and the traditional antenna device, the antenna device 200 of the embodiment of the present application receives 7 dB less interference signals.

[0149] Figure 16 yes Figure 1 Schematic diagram of the structure of the interference source with vertical polarization on the back panel of the electronic device. Figure 17 yes Figure 16 The effect diagram of the antenna device being interfered by a vertically polarized interference source. Figure 16 As shown, in order to verify the degree of interference of external environment interference sources such as vertically polarized antennas on the antenna device 200 of the embodiment of the present application, a vertically polarized interference source, namely a second interference source 270, is provided on the back panel 110 of the electronic device 10, such as a television, and the second interference source 270 radiates electromagnetic waves to the periphery.

[0150] Reference Figure 17As shown, curve r2 is an S11 parameter curve of a conventional antenna device after being interfered by the second interference source 270 , and curve s2 is an S11 parameter curve of the antenna device 200 according to an embodiment of the present application after being interfered by the second interference source 270 . It can be seen that the return loss of the resonance point k with a frequency of 2.4 GHz on the curve r2 is -30.649 dB, the return loss of the resonance point m with a frequency of 2.4 GHz on the curve s2 is -37.181 dB, the return loss of the resonance point l with a frequency of 5.6 GHz on the curve r2 is -33.267 dB, and the return loss of the resonance point n with a frequency of 5.6 GHz on the curve s2 is -40.435 dB. Excluding the influence of polarization on different antenna devices, at the resonance point of the same frequency, the antenna device 200 of the embodiment of the present application has a return loss that is 7 dB smaller than that of the traditional antenna device, that is, when the distance between the second interference source 270 and the antenna device 200 of the embodiment of the present application is equal to the distance between the second interference source 270 and the traditional antenna device, the antenna device 200 of the embodiment of the present application receives 7 dB less interference signals.

[0151] It can be seen from this that the antenna device 200 according to the embodiment of the present application can reduce the reception of interference signals in actual use.

[0152] Example 2

[0153] Figure 18 yes Figure 1 The fourth structural diagram of the antenna device is shown in Figure 2. Figure 19 yes Figure 18 The main view of the Figure 18 and Figure 19 As shown, different from the first embodiment, the distance m2 between the feeding structure 230 and the secondary radiating arm 250 is smaller than the distance m1 between the feeding structure 230 and the secondary radiating arm 250 in the first embodiment, that is, the distance between the feeding structure 230 and the secondary radiating arm 250 is smaller than the distance between the feeding structure 230 and the secondary radiating arm 250 in the first embodiment.

[0154] It should be noted that the distance between the feeding structure 230 and the secondary radiating arm 250 refers to the distance between the side of the feeding structure 230 facing the secondary radiating arm 250 and the side of the secondary radiating arm 250 facing the feeding structure 230 .

[0155] For example, when the feeding structure 230 is located between the secondary radiating arm 250 and the third side wall 2213 of the annular side wall 221, the distance between the secondary radiating arm 250 and the third side wall 2213 is 1 / 3 to 1 / 2 of the distance between the first side wall 2211 and the third side wall 2213 of the annular side wall 221, and the distance between the feeding structure 230 and the third side wall 2213 is 1 / 3 to 1 / 2 of the distance between the first side wall 2211 and the third side wall 2213.

[0156] In specific settings, the distance between the secondary radiation arm 250 and the third side wall 2213 is 1 / 2, 2 / 5 or 1 / 3 of the distance between the first side wall 2211 and the third side wall 2213 of the annular side wall 221, that is, the secondary radiation arm 250 is located at 1 / 2, 2 / 5 or 1 / 3 of the distance between the first side wall 2211 and the third side wall 2213, and the distance between the feeding structure 230 and the third side wall 2213 is 1 / 2, 2 / 5 or 1 / 3 of the distance between the first side wall 2211 and the third side wall 2213, that is, the feeding structure 230 is located at 1 / 2, 2 / 5 or 1 / 3 of the distance between the first side wall 2211 and the third side wall 2213. Exemplarily, the secondary radiation arm 250 is located at 1 / 2 between the first side wall 2211 and the third side wall 2213 , and the feeding structure 230 is located at 1 / 3 between the first side wall 2211 and the third side wall 2213 .

[0157] For another example, when the feeding structure 230 is located between the secondary radiating arm 250 and the first side wall 2211 (not shown in the figure), the distance between the secondary radiating arm 250 and the first side wall 2211 is 1 / 3 to 1 / 2 of the distance between the first side wall 2211 and the third side wall 2213, and the distance between the feeding structure 230 and the first side wall 2211 is 1 / 3 to 1 / 2 of the distance between the first side wall 2211 and the third side wall 2213.

[0158] In specific settings, the distance between the secondary radiation arm 250 and the first side wall 2211 is 1 / 2, 2 / 5 or 1 / 3 of the distance between the first side wall 2211 and the third side wall 2213 of the annular side wall 221, that is, the secondary radiation arm 250 is located at 1 / 2, 2 / 5 or 1 / 3 of the distance between the first side wall 2211 and the third side wall 2213, and the distance between the feeding structure 230 and the first side wall 2211 is 1 / 2, 2 / 5 or 1 / 3 of the distance between the first side wall 2211 and the third side wall 2213, that is, the feeding structure 230 is located at 1 / 2, 2 / 5 or 1 / 3 of the distance between the first side wall 2211 and the third side wall 2213. Exemplarily, the secondary radiation arm 250 is located at 1 / 2 between the first side wall 2211 and the third side wall 2213 , and the feeding structure 230 is located at 1 / 3 between the first side wall 2211 and the third side wall 2213 .

[0159] Figure 20 yes Figure 18 Antenna radiation effect diagram. Figure 20 As shown, curve q5 is the S11 parameter curve of the antenna device 200 according to the embodiment of the present application. Figure 20As can be seen above, the antenna device 200 of the present embodiment has five resonance points, including resonance point s, resonance point t, resonance point u, resonance point v, and resonance point w. The frequency of resonance point s is 2.45 GHz, the frequency of resonance point t is 3.9 GHz, the frequency of resonance point u is 4.9 GHz, the frequency of resonance point v is 5.5 GHz, and the frequency of resonance point w is 6.4 GHz.

[0160] Figure 21(a) is Figure 20 The simulated electric field diagram with the mid-resonance point at 2.45 GHz is shown in Figure 21(b). Figure 20 The simulated electric field diagram with the mid-resonance point at 3.9 GHz is shown in Figure 21(c). Figure 20 The simulated electric field diagram with the mid-resonance point at 4.9 GHz is shown in Figure 21(d). Figure 20 The simulated electric field diagram with the mid-resonance point at 5.5 GHz is shown in Figure 21(e). Figure 20 The simulated electric field diagram with the mid-resonance point at 6.4GHz. Figure 21(a) to Figure 21(e) As shown, the antenna device 200 of the embodiment of the present application excites five radiation modes during the antenna radiation process. Figure 21(a) to Figure 21(e) , the arrow S represents the direction of current flow.

[0161] 21( a ), the antenna device 200 excites the TE10 mode at the open end of the cavity during the radiation process. In this mode, the currents in the region H at the open end of the cavity are in the same direction and flow toward the top wall 222 . A current zero point appears in this region, and the TE10 mode at the open end of the cavity forms a resonance point s, that is, the TE10 mode at the open end of the cavity forms a 2.45 GHz frequency band.

[0162] As shown in Figure 21(b), the antenna device 200 excites the TE20 mode on the open side of the cavity during the radiation process. In this mode, in area I on the open side of the cavity, the current flows toward the metal floor 210, and in area J on the open side of the cavity, the current flows toward the top wall 222, and current zero points appear in areas I and J. The TE20 mode on the open side of the cavity forms a resonance point t, that is, the TE20 mode on the open side of the cavity forms a 3.9 GHz frequency band.

[0163] As shown in FIG. 21( c ), during radiation, the antenna device 200 excites a TE20 mode fed to the metal floor 210. In this mode, two separate regions are defined above the metal floor 210: region K and region L. Within both regions K and L, current flows toward the metal floor 210, and current zeros occur within regions K and L. This TE20 mode fed to the metal floor 210 forms a resonance point u, meaning that the TE20 mode fed to the metal floor 210 operates in the 4.9 GHz frequency band.

[0164] As shown in Figure 21(d), the antenna device 200 excites a TE30 mode formed by feeding the secondary radiating arm 250 during the radiation process. In this mode, there are three spaced regions near the secondary radiating arm 250, namely, region M, region N and region O. In region M, the current flows toward the top wall 222, in region N, the current flows toward the metal floor 210, and in region O, the current flows toward the top wall 222. Current zero points appear in regions M, N and O. The TE30 mode formed by feeding the secondary radiating arm 250 forms a resonance point v, that is, the TE30 mode formed by feeding the secondary radiating arm 250 forms a 5.5 GHz frequency band.

[0165] As shown in FIG21( e ), during radiation, the antenna device 200 excites a TE20 mode fed to the first side wall 2211. In this mode, two separate regions are located near the first side wall 2211, namely, region P and region Q. Currents in both region P and region Q flow toward the metal floor 210, and current zeros appear in region P and region Q. The TE20 mode fed to the first side wall 2211 forms a resonance point w, meaning that the TE20 mode fed to the first side wall 2211 generates a 6.4 GHz frequency band.

[0166] Based on the above, it can be seen that the embodiment of the present application arranges the feeding structure 230 and the secondary radiation arm 250 at the above-mentioned set positions between the first side wall 2211 and the third side wall 2213 of the annular side wall 221, respectively, so that the antenna device 200 excites five different radiation modes and generates five resonance points, covering 2.45GHz, 3.9GHz, 4.9GHz, 5.5GHz and 6.4GHz, so that the antenna device 200 can not only be used to cover WiFi 2.4G and WiFi 5G, but also can be used in NR frequency bands, covering N41 frequency band, N78 frequency band and N79 frequency band, and can also be used in future sub 8G and WiFi 6, etc.

[0167] Example 3

[0168] The embodiment of the present application further provides an electronic device 10, comprising an electronic device body 100 and at least one antenna device 200. The antenna device 200 may be the antenna device 200 in any of the above embodiments.

[0169] The antenna device 200 is fixed on the back panel 110 of the electronic device body 100. In this way, the main radiation arm 220 of the antenna device 200 and the electromagnetic waves in the radiation cavity 223 are radiated to a greater extent through the opening 224, and then radiated through the side of the electronic device 10 to the front of the screen of the electronic device 10.

[0170] Exemplarily, the antenna device 200 can be fixed on any side of the back panel 110. In this way, the path of the electromagnetic waves emitted by the antenna device 200 to the front of the TV screen is shortened, and the loss of the antenna device 200 in the radiation path is reduced, thereby improving the forward gain of the antenna device 200 and optimizing the front-screen antenna performance of the TV.

[0171] Figure 22 yes Figure 1 The antenna device is located outside the two bases. Figure 1 and Figure 22 As shown, taking a television set as an example, in actual application, the television body of the television set also includes multiple bases 120 spaced apart at the bottom of the back panel 110. The bases 120 are used to stably fix the electronic device 10 to a fixed surface such as a wall. For example, two bases 120 can be spaced apart at the bottom of the back panel 110 of the television set. For the convenience of description below, the base 120 on the left is referred to as the first base 121, and the base 120 on the right is referred to as the second base 122.

[0172] Reference Figure 1 As shown, the antenna device 200 can be fixed on any one of the left side, right side and top side of the back plate 110. Figure 22 As shown, in some examples, the antenna device 200 can also be fixed on the bottom edge of the back plate 110 provided with the base 120. The embodiment of the present application does not specifically limit the position of the antenna device 200.

[0173] Reference Figure 22 As shown, exemplarily, the antenna device 200 is arranged at the bottom edge of the back panel 110, and the antenna device 200 can be arranged at any position between the left side edge of the back panel 110 and the first base 121, that is, the distance m3 between the antenna device 200 and the left side edge of the back panel 110 can be any value.

[0174] It should be noted that the distance between the antenna device 200 and the left side of the back plate 110 refers to the distance between the side surface of the antenna device 200 facing the left side and the left side.

[0175] Figure 23 yes Figure 22 The antenna radiation effect diagram when the antenna device is located at different positions. Figure 23 As shown, taking m3 of 12 mm, 32 mm, and 52 mm as examples, the radiation performance of the antenna device 200 is studied. Figure 23Curve q2 in the figure represents the three S11 parameter curves for antenna device 200 when m3 is 12 mm, 32 mm, and 52 mm. It can be seen that the three S11 parameter curves essentially overlap. Furthermore, simulation experiments show that when m3 is 12 mm, 32 mm, and 52 mm, the directivity coefficients of antenna device 200 are 4.93 dBi, 4.92 dBi, and 4.74 dBi, respectively, and the forward gains are 1.3 dB, 1.4 dBi, and 1.7 dB, respectively.

[0176] It can be seen that when the antenna device 200 is set at any position between the left side of the back plate 110 and the first base 121, the parameters, directivity coefficient and forward gain of the antenna S11 are relatively stable and do not change with the position.

[0177] Figure 24 yes Figure 1 The antenna device is located between two bases. Figure 24 As shown, the antenna device 200 can be set at any position between the first base 121 and the second base 122. That is, when the antenna device 200 is set between the first base 121 and the second base 122, the distance m4 between the antenna device 200 and the first base 121 can be any value.

[0178] It should be noted that the distance between the antenna device 200 and the first base 121 refers to the distance between the side of the antenna device 200 facing the first base 121 and the first base 121 .

[0179] Taking m4 of 0mm, 5mm, 25mm, 45mm, 65mm, 85mm, 105mm, 125mm, 145mm, 185mm, 225mm, 265mm, 305mm, 345mm, 385mm, 425mm, 465mm, 505mm, 545mm, 585mm and 625mm as examples, the radiation performance of the antenna device 200 is studied. The simulation experiments show that when m4 is 0mm, 5mm, 25mm, 45mm, 65mm, 85mm, 105mm, 125mm, 145mm, 185mm, 225mm, 265mm, 305mm, 345mm, 385mm, 425mm, 465mm, 505mm, 545mm, 585mm and 625mm, the directivity coefficients of the antenna device 200 are 5.97dBi, 4.47dBi, 4.96dBi, 5.05dBi, 5.2dBi, 5.02dBi, 4.89dBi, 4.65dBi, 4.45dBi, 4.47dBi and 4.57dBi respectively. dBi, 4.54dBi, 4.46dBi, 4.53dBi, 4.52dBi, 4.52dBi, 4.51dBi, 4.49dBi, 4.82dBi, 4.93dBi and 4.92dBi, and the forward gains are 1dB, 1.9dB, 1.6dB, 1.45dB, 1.28dB, 1.14dB, 1.16dB, 1.32dB, 1.36dB, 1.16dB, 1.23dB, 1.3dB, 1.14dB, 1.14dB, 1.41dB, 1.15dB, 1.2dB, 1.24dB, 1.11dB, 1.39dB and 1.67dB respectively.

[0180] As can be seen, when antenna assembly 200 is positioned anywhere between first base 121 and second base 122, its directivity and forward gain are relatively stable and do not change with position. Therefore, antenna design can be tailored to the specific project requirements and the appropriate location on the back of the television for antenna assembly 200 placement.

[0181] The embodiment of the present application arranges the above-mentioned antenna device 200 on the back panel 110 of the electronic device body 100, so that the electromagnetic waves radiated by the antenna device 200 are radiated to the front of the screen of the electronic device 10 to a greater extent through the opening 224 of the antenna device 200, and due to the obstruction of the annular side wall 221 of the antenna device 200, the electromagnetic waves radiated to other areas are effectively reduced, thereby improving the forward gain of the antenna device 200 in the 2.4Gwifi band and other frequency bands, and reducing the directivity coefficient of the antenna device 200 in the 2.4Gwifi band and other frequency bands.

[0182] In addition, by setting the antenna device 200 as a cavity structure with an opening 224 on the side wall, multiple resonance points can be excited during the feeding process, thereby widening the bandwidth of the antenna device 200, enabling it to cover more frequency bands, improving the antenna performance of the antenna device 200, and further optimizing the display performance and functional requirements of the electronic device 10.

[0183] Reference Figure 1 As shown, in actual applications, the back panel 110 of the electronic device 10 can be a metal back panel, which can be configured as the metal floor 210 of the antenna device 200. For example, when the electronic device 10 is a television, the back panel 110 of the television can be used as the metal floor 210 of the antenna device 200. When assembling the antenna device 200 on the back of the television, the main radiating arm 220, the feeding structure 230, and the secondary radiating arm 250 can be directly fixed on the back of the television. This simplifies the structure of the antenna device 200 and the electronic device 10, such as a television, thereby not only reducing the manufacturing cost of the electronic device 10, but also improving the assembly efficiency of the electronic device 10 and reducing the weight of the electronic device 10.

[0184] In some applications, a metal frame, such as a metal plate, is further provided on the exterior of the back panel 110 of the electronic device 10, and the antenna device 200 is disposed between the back panel 110 and the metal frame. The exterior of the back panel 110 refers to the side of the back panel 110 facing away from the screen. For example, in some applications, a metal frame, such as a metal plate, is provided on the exterior of the back panel 110 of a television set, and the antenna device 200 is located between the back panel 110 and the metal frame.

[0185] Due to the special structure of the antenna device 200 in the embodiment of the present application, that is, the antenna device 200 in the embodiment of the present application is a cavity structure with an opening 224 on the side wall, that is, the other areas except the opening 224 are closed structures. The electromagnetic waves of the antenna device 200 are mainly radiated to the front of the screen through the opening 224 on the side wall, and the distribution of the signal current of the antenna device 200 is relatively concentrated, so that the antenna performance of the antenna device 200 will not be deteriorated due to the setting of the metal frame.

[0186] Figure 25 This is a second structural diagram of the electronic device provided in the embodiment of the present application. Figure 25 As shown, the number of antenna devices 200 in the embodiment of the present application is at least two, and the at least two antenna devices 200 are respectively arranged on two adjacent sides of the back plate 110 .

[0187] First, take two antenna devices 200 as an example, refer to Figure 25As shown, an antenna assembly 200 is provided on the bottom and left sides of the back panel 110. The horizontal distance m5 between the two antenna assemblies 200 is at least 18 mm, and the vertical distance m6 between the two antenna assemblies 200 is at least 27 mm, to further improve the isolation between the two antenna assemblies 200 and prevent signal interference between them.

[0188] It should be noted here that the numerical values ​​and numerical ranges involved in the embodiments of the present application are approximate values. Due to the influence of the manufacturing process, there may be a certain range of errors. Those skilled in the art may consider this part of the error to be negligible.

[0189] For example, the horizontal distance m5 between the two antenna devices 200 may be a suitable value such as 18 mm, 20 mm, 25 mm or 30 mm, and the vertical distance m6 between the two antenna devices 200 may be a suitable value such as 27 mm, 30 mm, 35 mm or 40 mm.

[0190] Take m5 as 18mm and m6 as 27mm as an example. Figure 25 The radiation performance of the two antenna devices 200 in the electronic device 10 is experimentally studied. Figure 25 As shown, for the convenience of description, the antenna device 200 located at the bottom edge of the back plate 110 is referred to as the first antenna device 201 , and the antenna device 200 located at the left edge of the back plate 110 is referred to as the second antenna device 202 .

[0191] Figure 26 yes Figure 25 Antenna radiation effect diagram of the two antenna devices in Figure 2. Figure 26 As shown, q3 is the collective term for the S11 parameter curves of the two antenna devices 200. It can be seen that the S11 parameter curves of the two antenna devices 200 are substantially overlapping. In addition, curve u1 is the isolation between the two antenna devices 200. It can be seen that the isolation between the two antenna devices 200 is above 27dB, indicating good isolation.

[0192] Figure 27 yes Figure 25 The simulated far-field pattern of the first antenna device, Figure 28 yes Figure 25 The simulated far-field pattern of the second antenna device. Figure 27 and Figure 28 As shown, it can be seen from simulation experiments that the maximum direction of the first antenna device 201 and the second antenna device 202 during the radiation process is on the horizontal plane (such as Figure 27 and Figure 28The two antennas are arranged in the xy plane (in the xy plane), and their far-field patterns complement each other, making them suitable for Wi-Fi MIMO deployment. Furthermore, simulations show that the directivity coefficient of the first antenna assembly 201 is 4.7 dBi, and the directivity coefficient of the second antenna assembly 202 is 5.4 dBi, both of which are superior to those of traditional antenna devices.

[0193] In the embodiment of the present application, at least one antenna device 200 is respectively provided on two adjacent sides of the back panel 110. In this way, the two antenna devices 200 can form a Wi-Fi MIMO layout, thereby enhancing the radiation intensity of the antenna device 200 on the electronic device 10 and broadening the coverage frequency band of the antenna device 200 on the electronic device 10, thereby improving the signal transmission performance of the electronic device 10.

[0194] Furthermore, because each antenna assembly 200 has a cavity structure with an opening 224 on one side, isolation between the antenna assemblies 200 is improved, preventing signal interference between the antenna assemblies 200. Furthermore, the far-field patterns of the two antenna assemblies 200 located on two adjacent sides are complementary, thus ensuring continuity in the frequency band covered by the Wi-Fi MIMO antenna.

[0195] In the above example, an antenna device 200 is respectively provided on two adjacent sides of the back plate 110 .

[0196] In some examples, at least two antenna devices 200 may be spaced apart and arranged on at least one of two adjacent sides of the back plate 110 . Figure 29 This is a third structural diagram of the electronic device provided in the embodiment of the present application. Figure 29 As shown, for example, in Figure 25 On the basis of the first antenna device, another antenna device is provided at a distance from the first antenna device on the bottom side of the back plate 110. For the convenience of description, the antenna device 200 on the side of the first antenna device 201 is referred to as the third antenna device 203.

[0197] Exemplarily, the first antenna device 201 and the third antenna device 203 may be disposed on the left and right sides of the first base 121 , respectively.

[0198] Figure 30 yes Figure 29 Antenna radiation effect diagram of the three antenna devices. Figure 30As shown, q4 is the collective term for the S11 parameter curves of the three antenna assemblies 200. It can be seen that the S11 parameter curves of the three antenna assemblies 200 are substantially overlapping. Furthermore, curve u2 is the isolation curve between the first antenna assembly 201 and the second antenna assembly 202. It can be seen that the isolation between the first antenna assembly 201 and the second antenna assembly 202 is above 28 dB, indicating good isolation. Curve u3 is the isolation curve between the first antenna assembly 201 and the third antenna assembly 203, and curve u4 is the isolation curve between the second antenna assembly 202 and the third antenna assembly 203. It can be seen that the isolation between the first antenna assembly 201 and the third antenna assembly 203, as well as the isolation between the second antenna assembly 202 and the third antenna assembly 203, are both above 39 dB.

[0199] In practical applications, the above three-antenna system can be used as a 2*wifi+BT mode. For example, the first antenna device 201 and the second antenna device 202 with complementary far-field radiation patterns can be used as wifi antennas to optimize the signal transmission performance between the router, and the third antenna device 203 can be used as a Bluetooth antenna to optimize the signal transmission performance between the remote control.

[0200] In addition, due to the structural characteristics of each antenna device 200 , the isolation between two adjacent antenna devices 200 is guaranteed, ensuring that the antenna devices 200 do not interfere with each other.

[0201] The embodiment of the present application arranges multiple antenna devices 200 at intervals on one of the side edges of the back panel 110, thereby rationally utilizing the space of the back panel 110 of the electronic device 10, further enhancing the radiation intensity of the antenna device 200 on the electronic device 10, and broadening the coverage frequency band of the antenna device 200 on the electronic device 10, thereby optimizing the performance of the electronic device 10.

[0202] In the description of the embodiments of this application, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they may refer to a fixed connection, an indirect connection via an intermediate medium, internal communication between two components, or an interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in the embodiments of this application based on specific circumstances.

[0203] The terms "first", "second", "third", "fourth", etc. (if any) in the description and claims of the embodiments of this application and the above-mentioned drawings are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence.

Claims

1. An antenna device for fixing on the back panel of an electronic device, characterized in that: The antenna device includes a metal floor, a main radiation arm and a feeding structure; The metal floor is used to be fixed to the back plate of the electronic device. The main radiating arm includes an annular side wall and a top wall. The top wall is arranged opposite to the metal floor. One end of the annular side wall is connected to the top wall, and the other end of the annular side wall is connected to the metal floor. The annular side wall has an opening, and the opening faces the edge of the back plate of the electronic device. The feeding structure is located in a radiating cavity enclosed by the main radiating arm and the metal floor. The feeding structure is used to feed a signal current to the main radiating arm. The antenna device further includes a secondary radiation arm, and the secondary radiation arm is arranged in the radiation cavity; One end of the secondary radiation arm facing the metal floor extends onto the metal floor, a second gap is defined between one end of the secondary radiation arm facing the top wall and the top wall, and the secondary radiation arm, the second gap, and the top wall form a filtering structure; Alternatively, a third gap is defined between one end of the secondary radiating arm facing the metal floor and the metal floor, and one end of the secondary radiating arm facing the top wall extends onto the top wall. The secondary radiating arm, the third gap, and the metal floor together form a filtering structure.

2. The antenna device according to claim 1, wherein The feeding structure includes a first part, a second part, and a third part connected in sequence, the second part is arranged opposite to the metal floor, and the first part and the third part extend toward the metal floor at one end away from the second part; A feeding port is provided on the metal floor, one of the first part and the third part is connected to the feeding port, and the other of the first part and the third part is connected to the metal floor.

3. The antenna device according to claim 2, wherein: A first gap is defined between the second portion and the top wall.

4. The antenna device according to any one of claims 1 to 3, characterized in that: The annular side wall includes a first side wall, a second side wall and a third side wall connected in sequence; The first side wall and the third side wall are arranged opposite to each other, the second side wall is located between the first side wall and the third side wall, the gap between the first side wall and the end of the third side wall away from the second side wall forms the opening, and the first side wall, the second side wall and the third side wall are all configured into a planar structure.

5. The antenna device according to claim 4, wherein: The feeding structure is located between the secondary radiating arm of the antenna device and the third sidewall of the annular sidewall, the distance between the secondary radiating arm and the third sidewall is 1 / 3 to 1 / 2 of the distance between the first sidewall and the third sidewall of the annular sidewall, and the distance between the feeding structure and the third sidewall is less than 1 / 3 of the distance between the first sidewall and the third sidewall; Alternatively, the feeding structure is located between the secondary radiating arm and the first side wall, the distance between the secondary radiating arm and the first side wall is 1 / 3 to 1 / 2 of the distance between the first side wall and the third side wall, and the distance between the feeding structure and the first side wall is less than 1 / 3 of the distance between the first side wall and the third side wall.

6. The antenna device according to claim 4, wherein: The feeding structure is located between the secondary radiating arm of the antenna device and the third sidewall of the annular sidewall, and the distance between the secondary radiating arm and the third sidewall is 1 / 3 to 1 / 2 of the distance between the first sidewall and the third sidewall of the annular sidewall; Alternatively, the feeding structure is located between the secondary radiating arm and the first side wall, and the distance between the secondary radiating arm and the first side wall is 1 / 3 to 1 / 2 of the distance between the first side wall and the third side wall.

7. The antenna device according to any one of claims 1 to 3, 5 to 6, characterized in that: The side wall of the secondary radiation arm of the antenna device is provided with an external thread, the top wall or the metal floor is provided with an internal thread, and the secondary radiation arm is threadedly connected to the top wall or the metal floor.

8. The antenna device according to claim 4, wherein: The side wall of the secondary radiation arm of the antenna device is provided with an external thread, the top wall or the metal floor is provided with an internal thread, and the secondary radiation arm is threadedly connected to the top wall or the metal floor.

9. An electronic device, characterized in that: comprising an electronic device body and at least one antenna device according to any one of claims 1 to 8; The antenna device is fixed on the back plate of the electronic device body, and the opening of the antenna device faces any side of the back plate.

10. The electronic device according to claim 9, characterized in that The back plate is a metal back plate, and the metal back plate is configured as a metal floor of the antenna device.

11. The electronic device according to claim 9, wherein: The number of the antenna devices is at least two, and the at least two antenna devices are respectively arranged on two adjacent side edges of the back plate.

12. The electronic device according to claim 11, wherein: The horizontal distance between the at least two antenna devices is at least 18 mm, and the vertical distance between the at least two antenna devices is at least 27 mm.

13. The electronic device according to claim 11 or 12, characterized in that: At least two antenna devices are spaced apart and arranged on at least one of the two adjacent side edges.

Images