WO2022152022A1

WO2022152022A1 - Antenna apparatus and electronic device

Info

Publication number: WO2022152022A1
Application number: PCT/CN2022/070327
Authority: WO
Inventors: 卢亮; 李士超; 张云; 李堃; 聂成成
Original assignee: 华为技术有限公司
Priority date: 2021-01-15
Filing date: 2022-01-05
Publication date: 2022-07-21
Also published as: CN114765300A

Abstract

Embodiments of the present application provide an antenna apparatus and an electronic device. A main radiation arm of the antenna apparatus is configured to comprise an annular side wall and a top wall, and the annular side wall, the top wall, and a metal floor together enclose a radiation cavity of which one side has an opening. In this way, when a feed structure in the radiation cavity feeds a signal current to the main radiation arm, an electromagnetic wave in the radiation cavity is radiated to the front of a screen of the electronic device to a great extent by means of the opening in the annular side wall, and due to the blocking of the annular side wall, electromagnetic waves radiated to other regions are effectively reduced, and thus the forward gain of the antenna apparatus in a 2.4 Gwifi frequency band and other frequency bands is improved, and the directivity coefficient of the antenna apparatus in the 2.4 Gwifi frequency band and other frequency bands is reduced.

Description

Antenna devices and electronic equipment

This application claims the priority of the Chinese patent application with the application number 202110055049.7 and the application name "Antenna Device and Electronic Equipment" filed with the China Patent Office on January 15, 2021, the entire contents of which are incorporated into this application by reference.

technical field

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 technique

In engineering systems such as radio communication, radio and television, radar, and navigation of aviation and navigation, radio waves are required to transmit information to complete the work of the entire system. Antennas are the basic devices used to transmit or receive radio waves in these systems. Taking TV sets as an example, in order to meet people's needs for ultra-high-definition video, cloud games, VR experience, TV distance education, etc., 5G antennas with the characteristics of large data transmission and large network capacity are installed on TV sets. To receive or send signals, so as to achieve information transfer with other devices.

In the conventional technology, a TV includes a TV body and an antenna device. The antenna device is arranged on the back panel of the TV body, and the antenna device is located at a position of the back panel near the bottom corner. At present, the antenna device is usually an Inverted F Antenna (IFA) or a Plane Inverted F Antenna (PPIFA), which radiates electromagnetic waves in all directions through the radiator of the IFA/PIFA antenna to make Part of the electromagnetic waves emitted by the antenna device can be radiated to the front of the screen of the TV body through the side of the TV body, so as to achieve the purpose of transmitting signals through the position in front of the screen.

However, the traditional antenna device has an open structure, that is, the sides are all open structures, so that the directivity coefficient of the 2.4Gwifi frequency band of the antenna device is high, and the forward gain (the gain of electromagnetic waves radiated to the front of the screen) is low, so Affects the front-screen antenna performance of electronic devices such as TVs.

SUMMARY OF THE INVENTION

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

An embodiment of the present application provides an antenna device for fixing on a backplane of an electronic device, the antenna device includes a metal floor, a main radiating arm and a feeding structure; wherein the metal floor is used for fixing with the backplane of the electronic device, The main radiating arm includes an annular side wall and a top wall, the top wall is arranged opposite the metal floor, one end of the annular side wall is connected to the top wall, the other end of the annular side wall is connected to the metal floor, and the annular side wall has an opening, and the opening faces the electronic On the edge of the backplane of the device, the feeding structure is located in the radiation cavity enclosed by the main radiating arm and the metal floor, and the feeding structure is used to feed the signal current to the main radiating arm.

In the embodiment of the present application, the main radiating arm of the antenna device is set to include an annular side wall and a top wall, and the annular side wall, the top wall and the metal floor are jointly enclosed into a radiation cavity with an opening on one side, so that when the radiation cavity is After the feeding structure in the body feeds the signal current to the main radiating arm, the electromagnetic waves in the radiation cavity are radiated to the front of the screen of the electronic device through the opening on the annular side wall to a greater extent, and due to the blocking of the annular side wall, the electromagnetic waves are effectively radiated. The electromagnetic waves radiated to other areas are reduced, thereby improving the forward gain of the antenna device in the 2.4Gwifi frequency band and other frequency bands, and reducing the directivity coefficient of the antenna device in the 2.4Gwifi frequency band and other frequency bands. At the same time, by setting 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 performance of the antenna. Antenna performance of the device. In addition, because the antenna device of the embodiment of the present application has a cavity structure with an opening on the side wall, that is, other regions except the opening are closed structures, so that the distribution of the signal current is more concentrated compared with the traditional antenna device, thereby reducing the The external environment such as horizontally polarized or vertically polarized antennas and other interference sources can interfere with the antenna device, which facilitates the layout of the antenna device and avoids interference to other antenna devices.

In an optional implementation manner, 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 one end of the first part and the third part away from the second part goes toward The direction of the metal floor extends;

The metal floor has a feeding port, 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.

In the embodiment of the present application, by setting the feeding structure to be similar to an inverted "U"-shaped structure, 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 and reduces the The power loss in the feeding structure effectively reduces the return loss of the antenna device according to the embodiment of the present application, and improves the antenna gain.

In an optional implementation manner, there is a first gap between the second part and the top wall, so as to realize the gap coupling feeding between the feeding structure and the main radiating arm.

In an optional implementation manner, the antenna device further includes a secondary radiation arm, and the secondary radiation arm is disposed in the radiation cavity.

In the embodiment of the present application, the secondary radiation arm is arranged in the radiation cavity enclosed by the main radiation arm and the metal floor, so that the signal current in the main radiation arm or the radiation cavity is fed into the secondary radiation arm, and the signal current is formed on the secondary radiation arm , and then radiate electromagnetic waves, so that the antenna device excites more resonance points, broadens the bandwidth of the entire antenna device, and enables the antenna device to cover more frequency bands, thereby improving the utilization rate of the antenna device.

In an optional implementation manner, one end of the auxiliary radiating arm facing the metal floor extends to the metal floor, an end of the auxiliary radiating arm facing the top wall and the top wall have a second gap, the auxiliary radiating arm, the second gap and The top wall forms a filtering structure, so that the secondary radiating arm couples and feeds the high-frequency signal current, filters out the low-frequency signal current, and excites the high-frequency electromagnetic wave signal through the secondary radiating arm.

Alternatively, there is a third gap between the end of the sub-radiating arm facing the metal floor and the metal floor, the end of the sub-radiating arm facing the top wall extends to the top wall, and the sub-radiating arm, the third gap and the metal floor together form a filtering structure, so that The secondary radiating arm is coupled to feed the high-frequency signal current, and the low-frequency signal current is filtered out, so as to excite the high-frequency electromagnetic wave signal through the secondary radiating arm.

In an optional implementation manner, the annular side wall includes a first side wall, a second side wall and a third side wall which are connected in sequence;

The first side wall and the third side wall are arranged oppositely, the second side wall is located between the first side wall and the third side wall, and a gap is formed between the first side wall and the end of the third side wall away from the second side wall The opening, the first side wall, the second side wall and the third side wall are all configured as a planar structure.

In this embodiment of the present application, three plane side walls are connected in sequence to form an annular side wall, and it is ensured that the annular side wall, the top wall and the metal floor are enclosed into a radiation cavity with one open side and five sides closed, so as to improve the forward direction of the 2.4Gwifi frequency band. The gain reduces the directivity coefficient of the 2.4Gwifi frequency band of the antenna device, and at the same time simplifies the structure of the main radiating arm, thereby improving the manufacturing efficiency of the antenna device.

In an optional implementation manner, the feeding structure is located between the secondary radiating arm of the antenna device and the third side wall of the annular side wall, and the distance between the secondary radiating arm and the third side wall is the third side wall of the annular side wall. 1/3～1/2 of the distance between one side wall and the third side wall, the distance between the feeding structure and the third side wall is less than 1/3 of the distance between the first side wall and the third side wall;

Alternatively, the feeding structure is located between the secondary radiation arm and the first side wall, and the distance between the secondary radiation 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 , 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.

In the embodiment of the present application, by arranging the feeding structure and the sub-radiating arm at the above-mentioned set positions between the first side wall and the third side wall of the annular side wall, respectively, the antenna device can excite four different radiation modes, Four resonance points are generated, 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 applied to cover wifi 2.4G and wifi 5G, but also can be applied to NR frequency band, covering N41 frequency band, N78 frequency band band and N79 band.

In an optional implementation manner, the feeding structure is located between the secondary radiating arm of the antenna device and the third side wall of the annular side wall, and the distance between the secondary radiating arm and the third side wall is the third side wall of the annular side wall. The distance between one side wall and the third side wall is 1/3～1/2, and the distance between the feeding structure and the third side wall is 1/3～1/2 of the distance between the first side wall and the third side wall 1/2;

Alternatively, the feeding structure is located between the secondary radiation arm and the first side wall, and the distance between the secondary radiation 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 , the distance between the feeding structure and the first side wall is 1/3˜1/2 of the distance between the first side wall and the third side wall.

In the embodiment of the present application, by arranging the feeding structure and the sub-radiating arm at the above-mentioned set positions between the first side wall and the third side wall of the annular side wall, the antenna device can excite five different radiation modes, Five resonance points are generated, covering 2.45GHz, 3.9GHz, 4.9GHz, 5.5GHz and 6.4GHz, so that the antenna device can be applied not only to cover wifi 2.4G and wifi 5G, but also to NR frequency band, covering N41 frequency band, N78 frequency band frequency band and N79 frequency band, and can also be applied to future sub 8G and wifi 6.

In an optional implementation manner, the side wall of the sub-radiating arm of the antenna device has external threads, the top wall or the metal floor is provided with internal threads, and the sub-radiating arms are threadedly connected to the top wall or the metal floor.

In the embodiment of the present application, an external thread is provided on the sub-radiating arm, and an inner thread is provided on the top wall or metal floor of the antenna device. In this way, when the sub-radiating arm is threadedly connected to the top wall, the sub-radiating arm can be rotated to obtain an internal thread. Stably adjust the distance between the sub-radiating arm and the metal floor, so as to quickly adjust the electromagnetic wave frequency band excited by the sub-radiating arm. The distance between the auxiliary radiating arm and the top wall can quickly adjust the electromagnetic wave frequency band excited by the auxiliary radiating arm, which not only facilitates adjusting the height of one end of the auxiliary radiating arm, but also simplifies the distance between the auxiliary radiating arm and the metal floor or the top wall. the connection structure, thereby improving the assembly efficiency of the entire antenna device. In addition, the connection strength between the sub-radiating arm and the metal floor or between the sub-radiating arm and the top wall is also enhanced.

Embodiments of the present application further provide an electronic device, including an electronic device body and at least one antenna device as described above;

The antenna device is fixed on the backplane of the electronic device body, and the opening of the antenna device faces any side of the backplane.

In the embodiment of the present application, by arranging the above-mentioned antenna device on the backplane of the electronic device body, the electromagnetic waves radiated by the antenna device can be radiated to the front of the screen of the electronic device through the opening of the antenna device to a greater extent, and due to the annular side wall of the antenna device It can effectively reduce the electromagnetic waves radiated to other areas, thereby improving the forward gain of the 2.4Gwifi frequency band of the antenna device and other frequency bands, and reducing the directivity coefficient of the 2.4Gwifi frequency band of the antenna device and other frequency bands. In addition, by setting 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 performance of the antenna. The antenna performance of the antenna device further optimizes the display performance and functional requirements of the electronic device.

In an optional implementation manner, the backplane is a metal backplane, and the metal backplane is configured as a metal floor of the antenna device, so as to simplify the structure of the antenna device and the electronic device, thereby not only reducing the manufacturing cost of the electronic device, but also The assembly efficiency of the electronic device is improved, and the weight of the electronic device is also reduced.

In an optional implementation manner, the number of antenna devices is at least two, and the at least two antenna devices are respectively disposed on two adjacent sides of the backplane.

In this embodiment of the present application, at least one antenna device is respectively disposed on two adjacent sides of the backplane, so that the two antenna devices can form a wifi MIMO layout, thereby enhancing the radiation intensity of the antenna device on the electronic device, and at the same time widening the electronic device. The upper antenna device covers the frequency band, thereby improving the signal transmission performance of the electronic equipment. In addition, because each antenna device is a cavity structure with an opening on one side, the isolation between the antenna devices is improved, and signal interference between the antennas is avoided. At the same time, the far-field 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 wifi MIMO antenna.

In an optional implementation manner, 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 degree of the two antenna devices, Make sure that there is no signal interference between the two.

In an optional implementation manner, at least two antenna devices are disposed at intervals on at least one of the two adjacent sides.

In this embodiment of the present application, by arranging multiple antenna devices at intervals on one of the sides of the backplane, while rationally utilizing the space of the backplane of the electronic device, the radiation intensity of the antenna device on the electronic device is further enhanced, and the antenna on the electronic device is widened at the same time. For the coverage frequency band of the device, for example, some antenna devices can be used as wifi antennas to optimize the signal transmission performance with the router, and another part of the antenna devices can be used as Bluetooth antennas to optimize the signal transmission performance with the remote control. In addition, due to the structural characteristics of each antenna device, the isolation between two adjacent antenna devices can be ensured, so as to ensure that mutual interference does not occur between the respective antenna devices.

Description of drawings

1 is a first structural schematic diagram of an electronic device provided by an embodiment of the present application;

Fig. 2 is the first structural schematic diagram of the antenna device in Fig. 1;

Fig. 3 is the front view of Fig. 2;

Fig. 4 is the top view of Fig. 2;

Fig. 5 is the simulated far-field pattern of Fig. 2;

Fig. 6 (a) is the plane direction diagram of Fig. 5 at phi=90°;

Fig. 6(b) is the plane direction diagram of Fig. 5 at theta=90°;

Fig. 7 is the partial structure schematic diagram of Fig. 3;

Fig. 8 is a second structural schematic diagram of the antenna device in Fig. 1;

Fig. 9 is the front view of Fig. 8;

Fig. 10 is the third structural schematic diagram of the antenna device in Fig. 1;

Fig. 11 is the antenna radiation effect diagram of Fig. 8;

Fig. 12(a) is a simulated electric field diagram with the resonance point of 2.45 GHz in Fig. 11;

Fig. 12(b) is a simulated electric field diagram with the resonance point of 3.6 GHz in Fig. 11;

Fig. 12(c) is a simulated electric field diagram with the resonance point in Fig. 11 being 5 GHz;

Fig. 12(d) is a simulated electric field diagram with the resonance point of 5.5 GHz in Fig. 11;

Fig. 13(a) is a current distribution diagram of the antenna device in Fig. 1 during the radiation process;

Figure 13(b) is a current distribution diagram of a conventional antenna device during the radiation process;

14 is a schematic structural diagram of an interference source with horizontal polarization on the backplane of the electronic device in FIG. 1;

Fig. 15 is the effect diagram after the antenna device in Fig. 14 is interfered by the interference source of horizontal polarization;

16 is a schematic structural diagram of a vertically polarized interference source on the backplane of the electronic device in FIG. 1;

Fig. 17 is the effect diagram after the antenna device in Fig. 16 is interfered by the interference source of vertical polarization;

FIG. 18 is a fourth structural schematic diagram of the antenna device in FIG. 1;

Figure 19 is a front view of Figure 18;

Fig. 20 is the antenna radiation effect diagram of Fig. 18;

Fig. 21(a) is a simulated electric field diagram with a resonance point of 2.45 GHz in Fig. 20;

Fig. 21(b) is a simulated electric field diagram with the resonance point of 3.9 GHz in Fig. 20;

Fig. 21(c) is a simulated electric field diagram with the resonance point of 4.9 GHz in Fig. 20;

Fig. 21(d) is a simulated electric field diagram with the resonance point of 5.5 GHz in Fig. 20;

Fig. 21(e) is a simulated electric field diagram with the resonance point of Fig. 20 being 6.4 GHz;

FIG. 22 is a schematic structural diagram of the antenna device in FIG. 1 being located outside of two bases;

Fig. 23 is the antenna radiation effect diagram when the antenna device in Fig. 22 is located at different positions;

Figure 24 is a schematic structural diagram of the antenna device in Figure 1 between two bases;

25 is a schematic diagram of a second structure of an electronic device provided by an embodiment of the present application;

Fig. 26 is the antenna radiation effect diagram of two antenna devices in Fig. 25;

Fig. 27 is the simulated far-field pattern of the first antenna device in Fig. 25;

Figure 28 is a simulated far-field pattern of the second antenna device in Figure 25;

29 is a third schematic structural diagram of an electronic device provided by an embodiment of the present application;

FIG. 30 is an antenna radiation effect diagram of the three antenna devices in FIG. 29 .

Description of reference numbers:

10 - Electronic equipment;

1-Antenna equipment; 100-Electronic equipment body; 200-Antenna device;

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 device; 202-second antenna device; 203-third antenna device;

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 - the first part; 232 - the second part; 233 - the third part;

2211 - the first side wall; 2212 - the second side wall; 2213 - the third side wall.

Detailed ways

The terms used in the embodiments of the present application are only used to explain specific embodiments of the present application, and are not intended to limit the present application.

FIG. 1 is a first structural schematic diagram of an electronic device provided by an embodiment of the present application. Referring to FIG. 1 , generally, an electronic device such as a TV is provided with an antenna device, and signals are sent or received through the antenna device to realize information transfer with routers, remote controllers and other remote devices.

Taking TVs as an example, with the development of 5G communication systems, 5G antenna devices have been applied to large-screen TVs. Receive or send signals to achieve information transfer with other devices, so as to meet people's needs for ultra-high-definition video, cloud games, VR experience, TV distance education, etc.

In the conventional technology, a large-screen TV includes a TV body and an antenna device. The antenna device is arranged on the back panel of the TV body, and the antenna device is located at a position of the back panel near the bottom corner. At present, the antenna device is usually an Inverted F Antenna (IFA) or a Plane Inverted F Antenna (PPIFA), which radiates electromagnetic waves in all directions through the radiator of the IFA/PIFA antenna to make Part of the electromagnetic waves emitted by the antenna device can be radiated to the front of the screen of the TV body through the side of the TV body, so as to achieve the purpose of transmitting signals through the position in front of the screen.

Specifically, taking the IFA antenna as an example, the IFA antenna includes a metal floor and a radiator that are arranged opposite to each other along the thickness direction of the TV body. The metal floor is provided with a feeding structure, a ground short-circuit leg and a parasitic structure between the metal floor and the radiator. The feeding structure is arranged at one end of the radiator, and one end of the feeding structure is connected to the radiator, and the other end is electrically connected to the signal emission source in the TV body through the feeding port on the metal floor. In this way, the signal emission The source feeds the signal current to the antenna radiator through the feeding port and the feeding structure, and the antenna radiator then transmits the signal current to the receiving end in the form of electromagnetic waves.

The two ends of the grounding 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, and there is a certain gap between the top of the parasitic structure and the radiator, so that the radiator feeds the signal through the gap coupling. The current is fed into the parasitic structure, and the parasitic structure transmits the signal current in the form of electromagnetic waves, thereby widening the bandwidth of the IFA antenna.

Based on the above, it can be seen that the traditional antenna equipment such as IFA antenna is an open structure, that is, the radiator and the metal floor are all open structures, and there is no side shielding part. Evenly radiated, the 2.4Gwifi frequency band of the antenna device has a high directivity coefficient, and only part of the electromagnetic waves are radiated from the side of the TV to the front of the screen, which reduces the forward gain and affects the front of the screen of electronic equipment such as TVs. Antenna performance. Among them, the directivity coefficient of the 2.4Gwifi frequency band of the traditional antenna equipment is 7.1dBi, and the forward gain is -2.4dBi. It should be noted that the forward gain refers to the gain of electromagnetic waves radiated by the antenna to the front of the screen of the large-screen TV.

The embodiments of the present application provide an antenna device and an electronic device. By setting the main radiating arm of the antenna device to include an annular side wall and a top wall, and enclosing the annular side wall, the top wall and the metal floor together to form an opening on one side In this way, after the feeding structure in the radiation cavity feeds the signal current to the main radiation arm, the electromagnetic waves in the radiation cavity will be radiated to the front of the screen of the electronic equipment through the opening on the annular side wall to a greater extent. And due to the blocking of the annular side wall, the electromagnetic waves radiated to other areas are effectively reduced, thereby improving the forward gain of the 2.4Gwifi frequency band of the antenna device and other frequency bands, and reducing the direction of the 2.4Gwifi frequency band and other frequency bands of the antenna device. Sex coefficient.

The structures of the antenna device and the electronic device according to the embodiments of the present application will be described in detail below through three embodiments.

Example 1

FIG. 2 is a first structural schematic diagram of the antenna device in FIG. 1 , and FIG. 3 is a front view of FIG. 2 . Referring to FIG. 2 and FIG. 3 , an embodiment of the present application provides an antenna device 200 , and the antenna device 200 is fixed on the backplane 110 of the electronic device 10 . It can be understood that the electronic device 10 includes an electronic device body 100 , the backplane 110 of the electronic device 10 and the screen of the electronic device 10 are respectively disposed on both sides of the electronic device body 100 along the thickness direction, and the antenna device 200 is fixed on the electronic device body 100 . on the backplane 110.

It should be noted that the electronic device 10 in this embodiment of the present application may include, but is not limited to, a television, a mobile phone, a tablet computer, a notebook computer, an ultra-mobile personal computer (UMPC for short), a handheld computer, a walkie-talkie, Netbooks, POS machines, personal digital assistants (personal digital assistants, PDAs for short), wearable devices, virtual reality devices, and other mobile or stationary terminals that have an antenna device 200 and a screen.

A specific television set in the embodiment of the present application is taken as an example for description. In practical applications, the TV body of the TV also includes a plurality of bases 120 arranged at intervals at the bottom of the back panel 110 , and the TV is stably fixed on a fixed surface such as a wall through the bases 120 . The antenna device 200 in this embodiment of the present application may be fixed on the backplane 110 .

Exemplarily, the antenna device 200 can be fixed on any side of the backplane 110, thus shortening the radiation path of the electromagnetic wave emitted by the antenna device 200 to the front of the screen of the TV set, reducing the loss of the antenna device 200 on the radiation path, Therefore, the forward gain of the antenna device 200 is improved, and the performance of the front-screen antenna of the television set is optimized. For example, the antenna device 200 can be fixed on one of the sides of the backplane 110 away from the base 120 , or can be fixed on one of the sides of the backplane 110 close to the base 120 , the embodiment of the present application does not specifically address the position of the antenna device 200 limit.

Referring to FIG. 2 and FIG. 3 , the antenna device 200 according to 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 backplane 110 of the electronic device 10 , the main radiating arm 220 includes an annular side wall 221 and a top wall 222 , and the top wall 222 is disposed opposite to the metal floor 210 , that is, the top wall 222 is located on the metal floor 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. That is to say, the annular side wall 221 is located between the top wall 222 and the metal floor. 210, and the two ends of the annular side wall 221 along the height direction (as shown in the y direction in FIG. 2) are respectively connected with the top wall 222 and the metal floor 210, so that the annular side wall 221, the top wall of the main radiating arm 220 222 and the metal floor 210 are enclosed into a cavity structure, and the cavity is the radiation cavity 223 of the antenna device 200 .

Wherein, the annular side wall 221 can be detachably fixed on the metal floor 210 by means of screws or clamping, so as to ensure the electrical connection between the annular side wall 221 and the metal floor 210, and at the same time facilitate the annular side wall 221 and the metal floor 210. individual replacement.

Referring to FIG. 2 , the annular sidewall 221 has an opening 224. For example, one or more strip-shaped slits can be provided on the side surface of the annular sidewall 221 facing the edge of the back plate 110, and the strip-shaped slit is used as the opening 224, and also A circular or square through hole may be formed on the side surface of the annular side wall 221 facing the edge of the backplane 110 , and the through hole is used as the opening 224 .

In this way, the antenna device 200 is formed into a structure in which the side part is open and the rest part is closed. When the antenna device 200 is assembled on the back plate 110 of the electronic device 10 such as a TV set, the opening 224 faces the edge of the back plate 110 of the TV set, for example, when the antenna device 200 is located at the first edge of the back plate 110, the annular sidewall The opening 224 of the 221 faces the first edge, so that the electromagnetic waves in the radiation cavity 223 are radiated from the edge of the back plate 110 to the front of the TV screen through the opening 224 .

It can be understood that, the number of the opening 224 may be one or more, and it may be adjusted according to actual needs.

The annular side wall 221 in the embodiment of the present application may be an arc-shaped side wall arranged around one of the axes perpendicular to the metal floor 210, so that the annular side wall 221 has a cylindrical structure.

FIG. 4 is a plan view of FIG. 2 . Referring to FIG. 4 , in some examples, the annular sidewall 221 may further include a first sidewall 2211 , a second sidewall 2212 and a third sidewall 2213 , the first sidewall 2211 and the third sidewall 2213 , which are connected in sequence. 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, The first sidewall 2211 , the second sidewall 2212 and the third sidewall 2213 are all configured in a planar structure.

In the embodiment of the present application, the annular side wall 221 is formed by connecting three plane side walls in sequence. After ensuring that the annular side wall 221, the top wall 222 and the metal floor 210 are enclosed into a radiation cavity 223 with one open side and five sides closed, to improve the 2.4 The forward gain of the Gwifi frequency band reduces the directivity coefficient of the 2.4Gwifi frequency band of the antenna device 200 , and at the same time simplifies the structure of the main radiating arm 220 , thereby improving the manufacturing efficiency of the antenna device 200 .

It can be understood that, the main radiation arm 220 in this embodiment of the present application may be a metal member such as copper or aluminum, so as to ensure the passage of current.

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

For example, as shown in FIG. 3 , a feeding port 240 is formed on the metal floor 210 , and one end of the feeding port 240 is electrically connected to a signal emitting source (not shown in the figure) inside the electronic device 10 , and the feeding structure 230 One end 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, so that the signal emitting source can feed the signal current to the main radiating arm 220 through the feeding port 240 and the feeding structure 230 so that the main radiation arm 220 generates electromagnetic waves, and the signal current on the main radiation arm 220 also stimulates the radiation cavity 223 to generate electromagnetic waves.

When the power feeding port 240 is specifically set, a mounting hole may be formed on the metal floor 210 first, one end of the power feeding port 240 is electrically connected to the power feeding structure 230, and the other end passes through the mounting hole and is connected to the electronic device 10, such as a TV inside the TV. The signal emission source is electrically connected. The specific structure of the feeding port 240 can be directly referred to the feeding port on the traditional antenna structure, and details are not repeated here.

Because the annular side wall 221 , the top wall 222 and the metal floor 210 of the embodiment of the present application together form 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. After 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 radiate to the front of the screen of the TV through the side of the TV. Due to the blocking of the annular side wall 221, the electromagnetic waves radiated to other areas are effectively reduced, thereby improving the 2.4Gwifi frequency band of the antenna device 200 and other frequency bands. The forward gain reduces the directivity coefficients of the 2.4Gwifi frequency band of the antenna device 200 and other frequency bands.

FIG. 5 is the simulated far-field pattern of FIG. 2 . Referring to FIG. 5 , the maximum direction of the antenna device 200 in the radiation process is on the horizontal plane (the x-y plane in FIG. 5 ), and it is obtained through simulation experiments that the directivity coefficient of the antenna device 200 of the embodiment of the present application is 5.9 dBi, which is 1.2dBi optimized compared to traditional antenna equipment.

Fig. 6(a) is a plan view of Fig. 5 at phi=90°, and Fig. 6(b) is a plan view of Fig. 5 at theta=90°. 6(a) and 6(b), the curve at point a is the plane direction curve of a conventional antenna device, and the curve at point b is the plane direction curve of the antenna device 200 according to the embodiment of the present application. Referring to Fig. 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 of the embodiment of the present application is optimized by 3.3976dB compared to the conventional technology. Referring to Fig. 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 of the embodiment of the present application is optimized by 3.34dB compared to the conventional technology.

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 and enabling it to cover more frequency bands , the antenna performance of the antenna device 200 is improved.

In specific settings, the feeding structure 230 in the embodiment of the present application may be a feeding wire or a feeding metal piece.

FIG. 7 is a partial structural schematic diagram of FIG. 3 . Referring to FIG. 7 , when the feeding structure 230 is a feeding metal piece, the feeding structure 230 may have an inverted "U" structure. The part 232 and the third part 233 , the second part 232 is disposed opposite the metal floor 210 , and one end of the first part 231 and the third part 233 away from the second part 232 extends toward the metal floor 210 .

The metal floor 210 has a feeding port 240 , one of the first part 231 and the third part 233 is connected to the feeding port 240 , and the other of the first part 231 and the third part 233 is connected to the metal floor 210 . For example, one end of the first part 231 away from the second part 232 is connected to the feeding port 240 , so that one end of the first part 231 is electrically connected to the signal transmitting source through the feeding port 240 , so that the signal current is fed into the feeding port 240 to the feeding structure 230 , and then the signal current is fed into the main radiating arm 220 through the feeding structure 230 . One 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 part 233 may be fixed on the metal floor 210 by means of snap connection or screw connection.

There is a first gap 225 between the second part 232 and the top wall 222 of the main radiating arm 220, so that the signal current on the second part 232 can break down the first gap 225 to feed the signal current into the main radiating arm 220. The top wall 222 of the radiating arm 220 flows in the entire main radiating arm 220 and the radiating cavity 223 to realize the gap coupling feeding between the feeding structure 230 and the main radiating arm 220 .

Of course, the second part 232 can also be directly attached to the top wall 222 of the main radiation arm 220, so that the signal current on the second part 232 is directly fed into the top wall 222 of the main radiation arm 220, so that the entire main radiation The arm 220 and the radiation cavity 223 flow.

In this embodiment of the present application, by setting the feeding structure 230 to be similar to an inverted "U"-shaped structure, 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 , which is beneficial to the impedance of the feeding structure 230 The matching 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.

In other examples, the feeding structure 230 may have an "L"-shaped structure. For example, as shown in FIG. 7 , the feeding structure 230 may only include the first part 231 and the second part 232 connected in sequence, and the first part 231 is connected to the metal Extending in the direction of the floor 210, the second part 232 is located at one end of the first part 231 close to the top wall 222, and the second part 232 and the first part 231 form a certain angle, for example, the angle between the second part 232 and the first part 231 is 90°. Wherein, there is a gap between the second part 232 and the top wall 222, and one end of the first part 231 away from the second part 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 part 232 is fed to the top wall 222 by means of gap feeding.

In addition, the feeding structure 230 can also be a structure of direct feeding and adding a capacitor, etc. The specific structure and feeding distance can be directly referred to the conventional technology, which will not be repeated here.

FIG. 8 is a schematic diagram of a second structure of the antenna device in FIG. 1 , and FIG. 9 is a front view of FIG. 8 . Referring to FIG. 8 and FIG. 9 , the antenna device 200 in this embodiment of the present application may further include a secondary radiation arm 250 , and the secondary radiation arm 250 is disposed in the radiation cavity 223 .

Referring to FIGS. 8 and 9 , in specific settings, the end of the auxiliary radiating arm 250 facing the metal floor 210 can extend to the metal floor 210 , and there is a first space between the end of the auxiliary radiating arm 250 facing the top wall 222 and the top wall 222 . Two gaps 226, for example, the bottom of the secondary radiation arm 250 is fixed on the metal floor 210, and a second gap 226 is formed between the top of the secondary radiation arm 250 and the top wall 222, so that the signal current on the top wall 222 can pass through the second gap 226. The two gaps 226 are fed into the secondary radiating arm 250, so that a signal current is formed on the secondary radiating arm 250, and then electromagnetic waves are radiated, so that the antenna device 200 can excite more resonance points, and the bandwidth of the entire antenna device 200 is widened, so that the The antenna device 200 can cover more frequency bands, thereby improving the utilization rate of the antenna device 200 .

In addition, when the end of the auxiliary radiating arm 250 facing the metal floor 210 can extend to the metal floor 210, and there is a second gap 226 between the end of the auxiliary radiating arm 250 facing the top wall 222 and the top wall 222, the auxiliary radiating arm 250, the first The two gaps 226 and the top wall 222 form a filtering structure, so that the secondary radiating arm 250 is coupled to feed the high-frequency signal current to filter out the low-frequency signal current, so as to excite the high-frequency electromagnetic wave signal through the secondary radiating arm 250 . The smaller the distance between the second gaps 226 is, the larger the projected area of the secondary radiating arm 250 projected onto the top wall 222 is, and the higher the frequency band of the signal current coupled and fed by the secondary radiating arm 250 is.

It can be understood that, the filtering principle of the filtering structure can be directly referred to the traditional antenna technology, which is not repeated here.

FIG. 10 is a schematic diagram of a third structure of the antenna device in FIG. 1 . Referring to FIG. 10 , in some examples, the end of the sub-radiating arm 250 facing the top wall 222 may extend to the top wall 222 , and there is a third gap 227 between the end of the sub-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 into the sub-radiation arm 250 through the third gap 227, so that a signal current is formed on the sub-radiation arm 250, and then electromagnetic waves are radiated, so that the antenna device 200 can excite more resonance point.

At the same time, the secondary radiating arm 250, the third gap 227 and the metal floor 210 together form a filtering structure, so that the secondary radiating arm 250 is coupled to feed the high-frequency signal current, and the low-frequency signal current is filtered out, so as to excite the high-frequency signal current through the secondary radiating arm 250. Electromagnetic wave signal. It can be understood that, the smaller the distance between the third gaps 227 is, the larger the projected area of the secondary radiation arm 250 projected onto the metal floor 210 is, and the higher the frequency band of the signal current coupled and fed by the secondary radiation arm 250 is.

Of course, in other examples, the secondary radiating arm 250 may 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 the There is also a gap between the bottom and the metal floor 210, so that not only the signal current on the main radiating arm 220 is fed into the secondary radiating arm 250 by means of gap feeding, but also the antenna device 200 forms two filtering structures, so that the The secondary radiating arm 250 effectively filters out the signal current in the low frequency band and feeds the signal current in the high frequency band.

It can be understood that, the secondary radiating arm 250 and the second side wall 2212 of the annular side wall 221 may be arranged at intervals. Of course, the secondary radiation arm 250 may also be in contact with the second side wall 2212 of the annular side wall 221 , which is not limited in this embodiment of the present application.

The secondary radiation arm 250 may be a metal block during specific setting, and the metal block may be fixed on the metal floor 210 or the top wall 222 by means of snap connection or screw connection.

In some examples, the side wall of the secondary radiating arm 250 has external threads, the top wall 222 or the metal floor 210 is provided with internal threads, and the secondary radiating arm 250 is threadedly connected to the top wall 222 or the metal floor 210, that is to say , when the secondary radiating arm 250 is assembled with the top wall 222, the secondary radiating arm 250 can be connected with the top wall 222 in a threaded fit; when the secondary radiating arm 250 is assembled with the metal floor 210, the secondary radiating arm 250 can be threadedly connected with the metal floor 210 . For example, the secondary radiation arm 250 may be a screw or a bolt, and a threaded hole is formed on the metal floor 210 or the top wall 222 .

In this embodiment of the present application, an external thread is provided on the sub-radiating arm 250, and an internal thread is provided on the top wall 222 or the metal floor 210 of the antenna device 200. Rotate the secondary radiating arm 250 to stably adjust the distance between the secondary radiating arm 250 and the metal floor 210 , that is, stably adjust the width of the third gap 227 , so as to quickly adjust the frequency band of electromagnetic waves excited by the secondary radiating arm 250 .

When the auxiliary radiating arm 250 is screwed to the metal floor 210, the distance between the auxiliary radiating arm 250 and the top wall 222 can be stably adjusted by rotating the auxiliary radiating arm 250, that is, the width of the second gap 226 can be stably adjusted, thereby Quickly adjusting the electromagnetic wave frequency band excited by the sub-radiating arm 250 not only facilitates adjusting the height of one end of the sub-radiating arm 250, but also simplifies the connection structure between the sub-radiating arm 250 and the metal floor 210 or the top wall 222, thereby improving the overall Assembly efficiency of the antenna device 200 .

It should be noted that the width of the second gap 226 refers to the distance between the end of the sub-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 sub-radiating arm 250 facing the metal floor 210 and the metal floor 210 .

8 and 9 , in the embodiment of the present application, the feeding structure 230 may 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 close to the third side wall 2213 of the annular side wall 221 . Three side walls 2213 are provided, and the secondary radiation arm 250 is located on the side of the feeding structure 230 away from the third side wall 2213 .

Of course, the feeding structure 230 may 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 close to the first side wall 2211 It is arranged that the secondary radiation arm 250 is located on the side of the feeding structure 230 away from the first side wall 2211 .

Wherein, 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 the first length of the annular side wall 221 . 1/3˜1/2 of the distance between the side wall 2211 and the third side wall 2213 , the distance between the feeding structure 230 and the third side wall 2213 is smaller than the distance between the first side wall 2211 and the third side wall 2213 1/3 of .

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, and also That is to say, the secondary radiation arm 250 is located at 1/2, 2/5 or 1/3 between the first side wall 2211 and the third side wall 2213 , and between the feeding structure 230 and the third side wall 2213 The distance 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 to say, the feeding structure 230 is located between the first side wall 2211 and the third side wall 2213. 1/4, 1/5 or 1/6 between 2213. Exemplarily, the secondary radiation arm 250 is located at 1/2 between the first sidewall 2211 and the third sidewall 2213 , and the feeding structure 230 is located at 1/4 between the first sidewall 2211 and the third sidewall 2213 place.

Correspondingly, when the feeding structure 230 is located between the secondary radiation arm 250 and the first side wall 2211 , the distance between the secondary radiation arm 250 and the first side wall 2211 is the distance between the first side wall 2211 and the third side wall 2213 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 .

For example, the distance between the secondary radiating 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, and also That is to say, the secondary radiation arm 250 is located at 1/2, 2/5 or 1/3 between the first side wall 2211 and the first side wall 2211 , and between the feeding structure 230 and the first side wall 2211 The distance 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 to say, the feeding structure 230 is located between the first side wall 2211 and the first side wall 2211. 1/4, 1/5 or 1/6 between 2211. Exemplarily, the secondary radiating arm 250 is located at 1/2 between the first sidewall 2211 and the first sidewall 2211 , and the feeding structure 230 is located at 1/4 between the first sidewall 2211 and the first sidewall 2211 place.

FIG. 11 is a radiation effect diagram of the antenna of FIG. 8 . Referring to FIG. 11 , the curve q1 is the S11 parameter curve of the antenna device 200 according to the embodiment of the application. It can be seen from FIG. 11 that the antenna device 200 according to the embodiment of the application has four resonance points, including resonance points 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.

Fig. 12(a) is the simulated electric field diagram with the resonance point of 2.45 GHz in Fig. 11, Fig. 12(b) is the simulated electric field diagram of Fig. 11 with the resonance point of 3.6 GHz, Fig. 12(c) is the simulated electric field diagram of Fig. 11 with the resonance point of 3.6 GHz The simulated electric field diagram of 5 GHz, Fig. 12(d) is the simulated electric field diagram of Fig. 11 when the resonance point is 5.5 GHz. Referring to FIG. 12(a) to FIG. 12(d) , the antenna device 200 according to the embodiment of the present application excites four radiation modes during the antenna radiation process. Here, in FIGS. 12( a ) to 12 ( d ), the arrow R represents the flow of the current.

12( a ), the antenna device 200 excites the TE10 mode of the open end of the cavity during the radiation process. In this mode, the currents of the entire open end of the cavity, that is, the area A, are in the same direction, and both go to the top wall 222 The TE10 mode at the open end of the cavity forms the resonance point c, that is, the TE10 mode at the open end of the cavity forms the 2.45GHz frequency band.

Referring to Fig. 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 the region B on the open side of the cavity, the current flows in the direction of the metal floor 210, In the region C on the open side of the cavity, the current flows in the direction of the top wall 222, and a current zero point appears in the regions B and C, the TE20 mode at the open end of the cavity forms the resonance point d, that is, the TE20 mode at the open end of the cavity The 3.6GHz frequency band is formed.

Referring to FIG. 12( c ), the antenna device 200 excites the TE20 mode fed to the first sidewall 2211 during the radiation process. In this mode, there are two spaced regions near the first sidewall 2211 , namely the region E and area F. Among them, in the area E, the current flows in the direction of the top wall 222 , in the area F, the current flows in the direction of the metal floor 210 , and a current zero point occurs in the area E and the area F, which feeds to the first side wall 2211 . The TE20 mode forms the resonance point e, that is, the TE20 mode fed to the first sidewall 2211 forms the 5GHz frequency band.

Referring to Fig. 12(d), the antenna device 200 excites the TE10 mode formed by feeding into the sub-radiating arm 250 during the radiation process. In this mode, in the region G near the sub-radiating arm 250, the current flows to the metal floor 210, and a current zero point appears in the region G, the TE10 mode formed by feeding the secondary radiating arm 250 forms the resonance point f, that is, the TE10 mode formed by feeding the secondary radiating arm 250 forms the 5.5GHz frequency band.

Based on the above, in the embodiment of the present application, by arranging the feeding structure 230 and the sub-radiating arm 250 at the above set positions between the first side wall 2211 and the third side wall 2213 of the annular side wall 221 respectively, the antenna device 200 excites four different radiation modes, generating four resonance points, covering 2.45GHz, 3.6GHz, 5GHz and 5.5GHz, so that the antenna device in the embodiment of the present application can not only be applied to cover wifi 2.4G and wifi 5G, but also can Applied to NR band, covering N41 band, N78 band and N79 band. Among them, the frequency ranges of the N41 frequency band, the N78 frequency band and the N79 frequency band can directly query the existing data, and will not be repeated here.

Fig. 13(a) is a current distribution diagram of the antenna device in Fig. 1 during a radiation process, and Fig. 13(b) is a current distribution diagram of a conventional antenna device during the radiation process. Referring to FIG. 13( a ), because the antenna device 200 of the embodiment of the present application has a cavity structure with an opening 224 on the side wall, that is, other regions except the opening 224 are closed structures, so that the signal current of the antenna device 200 is The distribution is more concentrated. Referring to FIG. 13( b ), since the side portion of the conventional antenna device 1 is completely open, the distribution of the signal current of the antenna device 1 is relatively scattered. However, in Fig. 13(a) and Fig. 13(b), the ripple p represents the signal current.

Based on the above, 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 conventional antenna device 1, thereby avoiding interference to signals of other devices of the television, such as other antennas. In addition, the interference to the antenna device 200 by an external environment such as a horizontally polarized or vertically polarized antenna is reduced.

FIG. 14 is a schematic structural diagram of a horizontally polarized interference source on the backplane of the electronic device in FIG. 1 , and FIG. 15 is an effect diagram of the antenna device in FIG. 14 after being interfered by the horizontally polarized interference source. Referring to FIG. 14 , in order to verify the degree of interference of the external environment such as a horizontally polarized antenna and other interference sources to the antenna device 200 of the embodiment of the present application, a horizontally polarized interference is provided on the backplane 110 of the electronic device 10 such as a TV set. The source is the first interference source 260, and the first interference source 260 radiates electromagnetic waves to the periphery.

Referring to FIG. 15 , the curve r1 is the S11 parameter curve of the traditional antenna device after being interfered by the first interference source 260 , and the curve s1 is the S11 parameter of the antenna device 200 according to the embodiment of the application after being interfered by the first interference source 260 curve. It can be seen that the return loss of the resonance point g with a frequency of 2.4GHz on the curve r1 is -29.19dB, the return loss of the resonance point i with a frequency of 2.4GHz on the curve s1 is -34.765dB, and the frequency on the curve r1 is 5.5dB The return loss of the resonance point h at GHz is -31.747dB, and the return loss of the resonance point j at the frequency of 5.5GHz on the curve s1 is -39.283dB, excluding the influence of polarization on different antenna devices, at the same frequency At the resonance point, the return loss of the antenna device 200 of the embodiment of the present application 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 and the first interference source 260 When the distance between the antenna devices is equal to that of the conventional antenna devices, the antenna device 200 according to the embodiment of the present application can receive 7 dB less of the interference signal.

FIG. 16 is a schematic structural diagram of a vertically polarized interference source on the backplane of the electronic device in FIG. 1 , and FIG. 17 is an effect diagram of the antenna device in FIG. 16 after being interfered by the vertically polarized interference source. Referring to FIG. 16 , in order to verify the degree of interference to the antenna device 200 of the embodiment of the present application by an interference source such as a vertically polarized antenna, an electronic device 10 such as a backplane 110 of a TV is provided with vertically polarized interference. The source is the second interference source 270 , and the second interference source 270 radiates electromagnetic waves to the periphery.

Referring to FIG. 17 , the curve r2 is the S11 parameter curve of the conventional antenna device after being interfered by the second interference source 270 , and the curve s2 is the S11 parameter of the antenna device 200 according to the embodiment of the application after being interfered by the second interference source 270 curve. It can be seen that the return loss of the resonance point k with a frequency of 2.4GHz on the curve r2 is -30.649dB, the return loss of the resonance point m with a frequency of 2.4GHz on the curve s2 is -37.181dB, and the frequency on the curve r2 is 5.6dB The return loss of the resonance point l at GHz is -33.267dB, and the return loss of the resonance point n at the frequency of 5.6GHz on the curve s2 is -40.435dB, excluding the influence of polarization on different antenna devices, at the same frequency At the resonance point, the return loss of the antenna device 200 of the embodiment of the present application is 7 dB smaller than that of the traditional antenna device, that is, the distance between the second interference source 270 and the antenna device 200 of the embodiment of the present application and the second interference source 270 When the distance between the antenna devices is equal to that of the conventional antenna devices, the antenna device 200 according to the embodiment of the present application can receive 7 dB less of the interference signal.

It can be seen from this that the antenna apparatus 200 of the embodiment of the present application can reduce the reception of interference signals in practical applications.

Embodiment 2

FIG. 18 is a schematic diagram of a fourth structure of the antenna device in FIG. 1 , and FIG. 19 is a front view of FIG. 18 . 18 and 19 , the difference from the first embodiment is that the distance m2 between the feeding structure 230 and the sub-radiating arm 250 is compared with the distance m1 between the feeding structure 230 and the sub-radiating arm 250 in the first embodiment That is to say, 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.

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 .

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 the first side of the annular side wall 221 The distance between the wall 2211 and the third side wall 2213 is 1/3~1/2, the distance between the feeding structure 230 and the third side wall 2213 is the distance between the first side wall 2211 and the third side wall 2213 1/3～1/2;

In specific setting, 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 to say, the secondary radiating arm 250 is located at 1/2, 2/5 or 1/3 between the first side wall 2211 and the third side wall 2213, and the feeding structure 230 and the third side wall 2213 The distance between them is 1/2, 2/5 or 1/3 of the distance between the first sidewall 2211 and the third sidewall 2213 , that is to say, the feeding structure 230 is located between the first sidewall 2211 and the third sidewall 2213 . 1/2, 2/5 or 1/3 between the side walls 2213 . Exemplarily, the secondary radiation arm 250 is located at 1/2 between the first sidewall 2211 and the third sidewall 2213 , and the feeding structure 230 is located at 1/3 between the first sidewall 2211 and the third sidewall 2213 place.

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

In specific setting, 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 to say, the secondary radiating arm 250 is located at 1/2, 2/5 or 1/3 between the first side wall 2211 and the third side wall 2213, and the feeding structure 230 and the first side wall 2211 The distance between them is 1/2, 2/5 or 1/3 of the distance between the first sidewall 2211 and the third sidewall 2213 , that is to say, the feeding structure 230 is located between the first sidewall 2211 and the third sidewall 2213 . 1/2, 2/5 or 1/3 between the side walls 2213 . Exemplarily, the secondary radiation arm 250 is located at 1/2 between the first sidewall 2211 and the third sidewall 2213 , and the feeding structure 230 is located at 1/3 between the first sidewall 2211 and the third sidewall 2213 place.

FIG. 20 is a radiation effect diagram of the antenna of FIG. 18 . Referring to FIG. 20 , the curve q5 is the S11 parameter curve of the antenna device 200 according to the embodiment of the present application. It can be seen from FIG. 20 that the antenna device 200 according to the embodiment of the present application has five resonance points, including the resonance points s, Resonance point t, resonance point u, resonance point v and resonance point w. The frequency of resonance point s is 2.45GHz, the frequency of resonance point t is 3.9GHz, the frequency of resonance point u is 4.9GHz, the frequency of resonance point v is 5.5GHz, and the frequency of resonance point w is 6.4GHz.

Fig. 21(a) is the simulated electric field diagram with the resonance point of 2.45 GHz in Fig. 20, Fig. 21(b) is the simulated electric field diagram of Fig. 20 with the resonance point of 3.9 GHz, Fig. 21(c) is the simulated electric field diagram of Fig. 20 with the resonance point of 3.9 GHz The simulated electric field diagram of 4.9 GHz, Fig. 21(d) is the simulated electric field diagram with the resonance point of 5.5 GHz in Fig. 20, and Fig. 21(e) is the simulated electric field diagram of the resonance point of 6.4 GHz in Fig. 20. Referring to FIGS. 21( a ) to 21 ( e ), the antenna device 200 according to the embodiment of the present application excites five radiation modes during the antenna radiation process. 21(a) to 21(e), the arrow S represents the flow of the current.

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 of the open end of the cavity are in the same direction, all facing the direction of the top wall 222 The TE10 mode at the open end of the cavity forms the resonance point s, that is, the TE10 mode at the open end of the cavity forms the 2.45GHz frequency band.

Referring to Fig. 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 the region I on the open side of the cavity, the current flows in the direction of the metal floor 210, In the region J on the open side of the cavity, the current flows in the direction of the top wall 222, and a current zero point appears in the regions I and J, and the TE20 mode on the open side of the cavity forms a resonance point t, that is, the cavity on the open side of the cavity. The TE20 mode forms the 3.9GHz frequency band.

Referring to FIG. 21( c ), the antenna device 200 excites the TE20 mode fed to the metal floor 210 during the radiation process. In this mode, there are two spaced regions above the metal floor 210 , namely the region K and the region L . In the area K and the area L, the current flows in the direction of the metal floor 210, and the current zero point appears in the area K and the area L, and the TE20 mode fed to the metal floor 210 forms a resonance point u, that is, the TE20 mode fed to the metal floor 210 The TE20 mode of the floor 210 forms the 4.9 GHz frequency band.

Referring to Fig. 21(d), the antenna device 200 excites the TE30 mode formed by feeding into the sub-radiation arm 250 during the radiation process. In this mode, there are three spaced regions near the sub-radiation arm 250, namely the region M , area N and area O, in the area M, the current flows in the direction of the top wall 222, in the area N, the current flows in the direction of the metal floor 210, in the area O, the current flows in the direction of the top wall 222, and Current zero points appear in the regions M, N and O, and the TE30 mode formed by feeding the sub-radiating arm 250 forms the resonance point v, that is, the TE30 mode formed by feeding the sub-radiating arm 250 forms the 5.5GHz frequency band.

Referring to FIG. 21(e), the antenna device 200 excites the TE20 mode formed by feeding the first sidewall 2211 during the radiation process. In this mode, there are two spaced regions near the first sidewall 2211, namely Area P and Area Q. The currents in the area P and the area Q both flow in the direction of the metal floor 210, and a current zero point appears in the area P and the area Q. The TE20 mode fed to the first sidewall 2211 forms the resonance point w, that is, the TE20 mode fed to the first side wall 2211. The TE20 mode of the first sidewall 2211 forms a 6.4 GHz frequency band.

Based on the above, in the embodiment of the present application, by arranging the feeding structure 230 and the sub-radiating arm 250 at the above set positions between the first side wall 2211 and the third side wall 2213 of the annular side wall 221 respectively, the antenna device The 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 applied to cover wifi 2.4G and wifi 5G, but also It can be applied to NR band, covering N41 band, N78 band and N79 band, and can also be applied to future sub 8G and wifi 6, etc.

Embodiment 3

Embodiments of the present application further provide an electronic device 10 , including 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 foregoing embodiments.

The antenna device 200 is fixed on the back plate 110 of the electronic device body 100 , so that the electromagnetic waves in the main radiating arm 220 and the radiation cavity 223 of the antenna device 200 are radiated through the opening 224 to a greater extent, and then pass through the electronic device 10 . radiates to the front of the screen of the electronic device 10 .

Exemplarily, the antenna device 200 can be fixed on any side of the backplane 110, thus shortening the radiation path of the electromagnetic wave emitted by the antenna device 200 to the front of the screen of the TV set, reducing the loss of the antenna device 200 on the radiation path, Thus, the forward gain of the antenna device 200 is improved, and the performance of the front-screen antenna of the television set is optimized.

FIG. 22 is a schematic structural diagram of the antenna device in FIG. 1 located outside the two bases. Referring to FIGS. 1 and 22 , taking a TV as an example, in practical applications, the TV body of the TV further includes a plurality of bases 120 arranged at intervals at the bottom of the back plate 110 , and the electronic device 10 is stably fixed by the bases 120 . on a fixed surface such as a wall. For example, two bases 120 may be arranged at intervals at the bottom of the back panel 110 of the TV set. For the convenience of description below, the base 120 on the left side is used as the first base 121 , and the base 120 on the right side is used as the second base 122 .

Referring to FIG. 1 , the antenna device 200 may be fixed on any one of the left side, the right side and the upper side of the backplane 110 . As shown in FIG. 22 , in some examples, the antenna device 200 may also be fixed on the bottom edge of the backplane 110 provided with the base 120 , and the embodiment of the present application does not specifically limit the position of the antenna device 200 .

Referring to FIG. 22 , exemplarily, the antenna device 200 is arranged on the bottom edge of the backplane 110 , and the antenna device 200 can be arranged at any position between the left side of the backplane 110 and the first base 121 , that is, That is, the distance m3 between the antenna device 200 and the left side of the backplane 110 can be any value.

It should be noted that the distance between the antenna device 200 and the left side of the backplane 110 refers to the distance between the side surface of the antenna device 200 facing the left side and the left side.

FIG. 23 is a diagram of the radiation effect of the antenna when the antenna device in FIG. 22 is located at different positions. Referring to FIG. 23 , taking m3 as 12mm, 32mm, and 52mm as examples, the radiation performance of the antenna device 200 is studied. The curve q2 in FIG. 23 represents the three The general term for the S11 parameter curve, it can be seen that the three S11 parameter curves basically overlap. In addition, the simulation experiment shows that when m3 is 12mm, 32mm and 52mm, the directivity coefficients of the antenna device 200 are 4.93dBi, 4.92dBi and 4.74dBi respectively, and the forward gains are 1.3dB, 1.4dB and 1.7dB respectively.

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

FIG. 24 is a schematic structural diagram of the antenna device in FIG. 1 located between two bases. Referring to FIG. 24 , 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 may be any value.

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

Taking m4 as 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 antenna The radiation performance of the device 200 was studied. The simulation experiment shows 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 respectively , 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, 4.57dBi, 4.54dBi, 4.46dBi, 4.53dBi, respectively dBi, 4.52dBi, 4.52dBi, 4.51dBi, 4.49dBi, 4.82dBi, 4.93dBi and 4.92dBi, the forward gain is 1dB, 1.9dB, 1.6dB, 1.45dB, 1.28dB, 1.14dB, 1.16dB, 1.32dB respectively , 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.

It can be seen from this that when the antenna device 200 is arranged at any position between the first base 121 and the second base 122, the antenna directivity coefficient and forward gain are relatively stable and do not change with the change of the position. Therefore, in the antenna design, the antenna device 200 can be arranged at an appropriate position on the back of the TV set according to the actual situation of the project.

In the embodiment of the present application, by disposing the above-mentioned antenna device 200 on the backplane 110 of the electronic device body 100 , the electromagnetic waves radiated by the antenna device 200 are radiated to the front of the screen of the electronic device 10 through the opening 224 of the antenna device 200 to a greater extent, and Due to the blocking 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 2.4Gwifi frequency band of the antenna device 200 and other frequency bands, and reducing the 2.4Gwifi frequency of the antenna device 200. frequency band and other frequency band directivity coefficients.

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 and enabling it to cover more frequency bands , the antenna performance of the antenna device 200 is improved, and the display performance and functional requirements of the electronic device 10 are further optimized.

Referring to FIG. 1 , in practical applications, the backplane 110 of the electronic device 10 may be a metal backplane, and the metal backplane may be configured as a metal floor 210 of the antenna device 200 . For example, when the electronic device 10 is a TV, the back panel 110 of the TV can be used as the metal floor 210 of the antenna device 200 . When assembling the antenna device 200 on the back of the TV set, the main radiating arm 220, the feeding structure 230 and the sub-radiating arm 250 can be directly fixed on the back of the TV set, which simplifies the structure of the antenna device 200 and the electronic device 10 such as the TV set , so that not only the manufacturing cost of the electronic device 10 is reduced, but also the assembly efficiency of the electronic device 10 is improved, and the weight of the electronic device 10 is also reduced.

In addition, in some applications, the outside of the backplane 110 of the electronic device 10 is further provided with a metal frame such as a metal plate, and the antenna device 200 is provided between the backplane 110 and the metal frame. The outside of the backplane 110 refers to the side of the backplane 110 facing away from the screen. For example, in some applications, a metal frame such as a metal plate may be disposed outside the backplane 110 of the television set, and the antenna device 200 is located between the backplane 110 of the television set and the metal frame.

Due to the particularity of the structure of the antenna device 200 of the embodiment of the present application, that is, 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, other regions except the opening 224 are closed structures, and the antenna device 200 has a cavity structure. The electromagnetic waves are mainly radiated to the front of the screen through the opening 224 in 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.

FIG. 25 is a schematic diagram of a second structure of an electronic device provided by an embodiment of the present application. Referring to FIG. 25 , the number of antenna devices 200 in this embodiment of the present application is at least two, and the at least two antenna devices 200 are respectively disposed on two adjacent sides of the backplane 110 .

First, taking two antenna devices 200 as an example, as shown in FIG. 25 , one antenna device 200 is respectively disposed on the bottom side and the left side of the backplane 110 . The horizontal distance m5 between the two antenna devices 200 is at least 18 mm, and the vertical distance m6 between the two antenna devices 200 is at least 27 mm, so as to further improve the isolation of the two antenna devices 200 and ensure that the two antenna devices 200 do not Signal interference occurs.

It should be noted here that the numerical values and numerical ranges involved in the embodiments of the present application are approximate values, and there may be errors in a certain range due to the influence of the manufacturing process, and those skilled in the art can consider these errors to be ignored.

Exemplarily, the horizontal distance m5 between the two antenna devices 200 may be suitable values such as 18mm, 20mm, 25mm or 30mm, and the vertical distance m6 between the two antenna devices 200 may be 27mm, 30mm, 35mm or 40mm, etc. suitable value.

Taking m5 as 18mm and m6 as 27mm as an example, an experimental study on the radiation performance of the two antenna devices 200 in the electronic device 10 shown in FIG. 25 is carried out. Referring to FIG. 25 , for convenience of description, the antenna device 200 located at the bottom of the backplane 110 is taken as the first antenna device 201 , and the antenna device 200 located on the left side of the backplane 110 is taken as the second antenna device 202 .

FIG. 26 is an antenna radiation effect diagram of the two antenna devices in FIG. 25 . Referring to FIG. 26 , q3 is a general term for the S11 parameter curves of the two antenna devices 200 , and it can be seen that the S11 parameter curves of the two antenna devices 200 basically overlap. In addition, the curve u1 is the isolation degree between the two antenna devices 200, and it can be seen that the isolation degree between the two is above 27 dB, and the isolation degree is good.

FIG. 27 is a simulated far-field pattern of the first antenna device in FIG. 25 , and FIG. 28 is a simulated far-field pattern of the second antenna device in FIG. 25 . Referring to FIG. 27 and FIG. 28 , it can be seen from simulation experiments that the maximum directions of the first antenna device 201 and the second antenna device 202 in the radiation process are on the horizontal plane (the x-y plane in FIG. 27 and FIG. 28 ), and the two The far-field patterns of the two devices are complementary and can be used as a wifi MIMO layout. In addition, it is obtained through simulation experiments that the directivity coefficient of the first antenna device 201 is 4.7dBi, and the directivity coefficient of the second antenna device 202 is 5.4dBi, which are also better than traditional antenna devices.

In this embodiment of the present application, at least one antenna device 200 is respectively disposed on two adjacent sides of the backplane 110 , so that the two antenna devices 200 can form a wifi MIMO layout, thereby enhancing the radiation intensity of the antenna device 200 on the electronic device 10 , and at the same time widen 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 .

In addition, because each antenna device 200 is a cavity structure with an opening 224 on one side, the isolation between the antenna devices 200 is improved, and signal interference between the antenna devices 200 is avoided. At the same time, the far-field patterns of the two antenna devices 200 located on two adjacent sides are complementary, thus ensuring the continuity of the frequency band covered by the formed wifi MIMO antenna.

In the above example, one antenna device 200 is respectively disposed on two adjacent sides of the backplane 110 .

In some examples, at least two antenna devices 200 may be disposed at intervals on at least one of two adjacent sides of the backplane 110 . FIG. 29 is a third structural schematic diagram of an electronic device provided by an embodiment of the present application. Referring to FIG. 29 , for example, on the basis of FIG. 25 , another antenna device is arranged at intervals on one side of the first antenna device on the bottom side of the backplane 110 . For the convenience of description, the antenna device 200 on the side of the first antenna device 201 is taken as the third antenna device 203 .

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.

FIG. 30 is an antenna radiation effect diagram of the three antenna devices in FIG. 29 . Referring to FIG. 30 , q4 is a general term for the S11 parameter curves of the three antenna devices 200 , and it can be seen that the S11 parameter curves of the three antenna devices 200 basically overlap. In addition, the curve u2 is the isolation curve of the first antenna device 201 and the second antenna device 202. It can be seen that the isolation between the first antenna device 201 and the second antenna device 202 is above 28dB, and the isolation is good; the curve u3 is the first antenna device 201 and the second antenna device 202. The isolation curve of an antenna device 201 and the third antenna device 203, the curve u4 is the isolation curve of the second antenna device 202 and the third antenna device 203, it can be seen that the first antenna device 201 and the third antenna device 203 The isolation and the isolation of the second antenna device 202 and the third antenna device 203 are all above 39 dB.

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

In addition, due to the structural characteristics of each antenna device 200 , the isolation degree between two adjacent antenna devices 200 is ensured, and it is ensured that mutual interference does not occur between each antenna device 200 .

In this embodiment of the present application, by arranging a plurality of antenna devices 200 at intervals on one of the sides of the backplane 110, while rationally utilizing the space of the backplane 110 of the electronic device 10, the radiation intensity of the antenna device 200 on the electronic device 10 is further enhanced, At the same time, the coverage frequency band of the antenna device 200 on the electronic device 10 is widened, thereby optimizing the performance of the electronic device 10 .

In the description of the embodiments of the present application, it should be noted that, unless otherwise expressly specified and limited, the terms "installed", "connected" and "connected" should be understood in a broad sense, for example, it may be a fixed connection or a The indirect connection through an intermediate medium may be the internal communication of the two elements or the interaction relationship between the two elements. Those of ordinary skill in the art can understand the specific meanings of the above terms in the embodiments of the present application according to specific situations.

The terms "first", "second", "third", "fourth", etc. (if any) in the description and claims of the embodiments of the present application and the above-mentioned drawings are used to distinguish similar objects, while It is not necessary to describe a particular order or sequence.

Claims

An antenna device for fixing on a backplane of an electronic device, characterized in that the antenna device comprises a metal floor, a main radiating arm and a feeding structure;

The metal floor is used to be fixed with the backplane of the electronic device, the main radiating arm includes an annular side wall and a top wall, the top wall is arranged opposite the metal floor, and one end of the annular side wall is connected to the The top wall is connected, the other end of the annular side wall is connected to the metal floor, the annular side wall has an opening, the opening faces the edge of the backplane of the electronic device, and the feeding structure is located on the The main radiating arm and the metal floor are enclosed in a radiating cavity, and the feeding structure is used to feed a signal current to the main radiating arm.
The antenna device according to claim 1, wherein the feeding structure comprises a first part, a second part and a third part which are connected in sequence, the second part is disposed opposite to the metal floor, and the first part is arranged opposite to the metal floor. One part and one end of the third part away from the second part extend toward the direction of the metal floor;

The metal floor has a feed port, one of the first part and the third part is connected to the feed port, and the other of the first part and the third part is connected to the feed port. on the metal floor.
The antenna device of claim 2, wherein a first gap is formed between the second portion and the top wall.
The antenna device according to any one of claims 1-3, characterized in that, the antenna device further comprises a secondary radiation arm, and the secondary radiation arm is arranged in the radiation cavity.
The antenna device according to claim 4, wherein one end of the sub-radiating arm facing the metal floor extends to the metal floor, and one end of the sub-radiating arm facing the top wall is connected to the top wall. There is a second gap between the walls, and the auxiliary radiation arm, the second gap and the top wall form a filtering structure;

Alternatively, there is a third gap between one end of the sub-radiating arm facing the metal floor and the metal floor, and one end of the sub-radiating arm facing the top wall extends to the top wall, and the sub-radiating arm extends to the top wall. The arm, the third gap and the metal floor together form a filtering structure.
The antenna device according to any one of claims 1-5, wherein the annular side wall comprises a first side wall, a second side wall and a third side wall which are 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, and the first side wall and the third side wall are located between the first side wall and the third side wall. A gap between one end of the sidewall away from the second sidewall forms the opening, and the first sidewall, the second sidewall and the third sidewall are all configured in a planar structure.
The antenna device according to claim 6, wherein the feeding structure is located between a secondary radiating arm of the antenna device and a third side wall of the annular side wall, and the secondary radiating arm is connected to the third side wall of the annular side wall. The distance between the third sidewalls 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 feed structure and the third sidewall The distance is less than 1/3 of the distance between the first side wall and the third side wall;

Alternatively, the feeding structure is located between the secondary radiation arm and the first side wall, and the distance between the secondary radiation arm and the first side wall is equal to the distance between the first side wall and the first side wall. 1/3 to 1/2 of the distance between the three side walls, 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 /3.
The antenna device according to claim 6, wherein the feeding structure is located between a secondary radiating arm of the antenna device and a third side wall of the annular side wall, and the secondary radiating arm is connected to the third side wall of the annular side wall. The distance between the third sidewalls 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 feed structure and the third sidewall The distance is 1/3 to 1/2 of the distance between the first side wall and the third side wall;

Alternatively, the feeding structure is located between the secondary radiation arm and the first side wall, and the distance between the secondary radiation arm and the first side wall is equal to the distance between the first side wall and the first side wall. 1/3 to 1/2 of the distance between the three side walls, the distance between the feeding structure and the first side wall is 1 of the distance between the first side wall and the third side wall /3～1/2.
The antenna device according to any one of claims 4-8, wherein the side wall of the sub-radiating arm of the antenna device has external threads, and the top wall or the metal floor is provided with internal threads, The auxiliary radiating arm is screwed with the top wall or the metal floor.
An electronic device, characterized by comprising an electronic device body and at least one antenna device according to any one of claims 1-9;

The antenna device is fixed on the backplane of the electronic device body, and the opening of the antenna device faces any side of the backplane.
The electronic device according to claim 10, wherein the backplane is a metal backplane, and the metal backplane is configured as a metal floor of the antenna device.
The electronic device according to claim 10 or 11, wherein the number of the antenna devices is at least two, and at least two of the antenna devices are respectively disposed on two adjacent sides of the backplane.
The electronic device according to claim 12, wherein a horizontal distance between the at least two antenna devices is at least 18 mm, and a vertical distance between the at least two antenna devices is at least 27 mm.
The electronic device according to claim 12 or 13, characterized in that, at least two antenna devices are provided at intervals on at least one of the two adjacent side edges.