CN114765300A

CN114765300A - Antenna device and electronic apparatus

Info

Publication number: CN114765300A
Application number: CN202110055049.7A
Authority: CN
Inventors: 卢亮; 李士超; 张云; 李堃; 聂成成
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2021-01-15
Filing date: 2021-01-15
Publication date: 2022-07-19
Also published as: WO2022152022A1

Abstract

The embodiment of the application provides an antenna device and electronic equipment, set up to include annular lateral wall and roof through the main radiation arm with antenna device, and make annular lateral wall, roof and metal floor enclose jointly and become one side to have the open-ended radiation cavity, like this, after feed structure in the radiation cavity feeds in signal current to main radiation arm, just electromagnetic wave in the radiation cavity is preceding to the screen of electronic equipment through the opening radiation on the annular lateral wall to the bigger degree, and because of the blockking of annular lateral wall, electromagnetic wave to other regional radiations has been reduced effectively, thereby improved the preceding gain of antenna device on 2.4Gwifi frequency channel and other frequency channels, the directivity factor of antenna device on 2.4Gwifi frequency channel and other frequency channels has been reduced.

Description

Antenna device and electronic apparatus

Technical Field

The embodiment of the application relates to the technical field of electronic equipment, in particular to an antenna device and electronic equipment.

Background

In engineering systems such as radio communication, broadcast television, radar, navigation of air and navigation, etc., radio waves are required to transmit information to complete the work of the whole system, and an antenna is a basic device for transmitting or receiving radio waves in the systems. Taking a television as an example, in order to meet the requirements of people on ultra-high-definition videos, cloud games, VR experiences, television remote education and the like, a 5G antenna which has the characteristics of being capable of completing large-data-volume transmission, having ultra-large network capacity and the like is arranged on the television to receive or send signals, so that information transmission with other equipment and the like is realized.

In the conventional technology, a television includes a television body and an antenna device, the antenna device is disposed on a back plate of the television body, and the antenna device is located at a position of the back plate near a corner of the bottom. Currently, an Antenna device is usually an Inverted F Antenna (IFA) or a planar Inverted F Antenna (PPIFA), and electromagnetic waves are radiated in various directions by a radiator of the IFA/PIFA Antenna, so that part of the electromagnetic waves emitted by the Antenna device can be radiated to the front of a screen of a television body through a side of the television body, thereby achieving a purpose of transmitting signals through a position in front of the screen.

However, the conventional antenna device has an open structure, i.e., the side of the antenna device is an open structure, 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, thereby affecting the performance of the front-screen antenna of the electronic device such as a television.

Disclosure of Invention

The embodiment of the application provides an antenna device and electronic equipment, can solve the problem that the antenna device's 2.4Gwifi frequency channel directivity coefficient is high among traditional electronic equipment, and it is low to gain forward to influence the antenna performance before the screen of electronic equipment.

The embodiment of the application provides an antenna device which is used for being fixed on a back plate of electronic equipment and comprises a metal floor, a main radiation arm and a feed structure; the metal floor is used for being fixed with a back plate of electronic equipment, the main radiation arm comprises an annular side wall and a top wall, the top wall and the metal floor are arranged oppositely, one end of the annular side wall is connected with the top wall, the other end of the annular side wall is connected with the metal floor, an opening is formed in the annular side wall and faces the edge of the back plate of the electronic equipment, the feed structure is located in a radiation cavity formed by the main radiation arm and the metal floor in an enclosing mode, and the feed structure is used for feeding signal current into the main radiation arm.

The embodiment of the application sets up the main radiation arm of antenna device to include annular side wall and roof, and make annular side wall, roof and metal floor enclose jointly and become one side and have the open-ended radiation cavity, like this, after feed structure in the radiation cavity feeds signal current into main radiation arm, just electromagnetic wave in the radiation cavity passes through opening radiation to before electronic equipment's the screen on the annular side wall to the bigger degree, and because of the blockking of annular side wall, electromagnetic wave to other regional radiations has been reduced effectively, thereby improved the preceding gain of antenna device on 2.4Gwifi frequency channel and other frequency channels, the directivity factor of antenna device on 2.4Gwifi frequency channels and other frequency channels has been reduced. Meanwhile, the antenna device is arranged to be a cavity structure with an opening on the side wall, and a plurality of resonance points can be excited in the feeding process, so that the bandwidth of the antenna device is widened, more frequency bands can be covered by the antenna device, and the antenna performance of the antenna device is improved. In addition, the antenna device of the embodiment of the application is a cavity structure with an opening on a side wall, that is, other areas except the opening are closed structures, so that the distribution of signal current is more concentrated compared with the traditional antenna equipment, the interference of external environments such as a horizontally polarized or vertically polarized antenna and other interference sources to the antenna device is reduced, the layout of the antenna device is facilitated, and the interference to other antenna devices is avoided.

In an alternative implementation manner, the feed structure includes a first portion, a second portion and a third portion that are connected in sequence, the second portion is disposed opposite to the metal floor, and one ends of the first portion and the third portion, which are far away from the second portion, extend in a direction of the metal floor;

the metal floor is provided with a power feeding port, one of the first part and the third part is connected to the power feeding port, and the other of the first part and the third part is connected to the metal floor.

This application embodiment sets up to similar "U" type structure through with feed structure for feed structure's one end and feed port are connected, and the other end is connected with metal floor, are favorable to feed structure's impedance match, have reduced the power loss among the feed structure, have reduced the return loss of the antenna device of this application embodiment effectively, have improved antenna gain.

In an alternative implementation, the second portion has a first gap with the top wall to implement gap-coupled feeding between the feeding structure and the main radiating arm.

In an alternative implementation, the antenna device further includes a secondary radiating arm, and the secondary radiating arm is disposed in the radiating cavity.

According to the embodiment of the application, the auxiliary radiation arm is arranged in the radiation cavity formed by surrounding 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 auxiliary radiation arm, the signal current is formed on the auxiliary radiation arm, and then the electromagnetic waves are radiated, so that the antenna device excites more resonance points, the bandwidth of the whole antenna device is widened, the antenna device can cover more frequency bands, and the utilization rate of the antenna device is improved.

In an optional implementation manner, one end of the auxiliary radiation arm facing the metal floor extends onto the metal floor, a second gap is formed between one end of the auxiliary radiation arm facing the top wall and the top wall, and the auxiliary radiation arm, the second gap and the top wall form a filtering structure, so that the auxiliary radiation arm is coupled and fed with a high-frequency-band signal current, a low-frequency signal current is filtered, and an electromagnetic wave signal of a high-frequency band is excited through the auxiliary radiation arm.

Or a third gap is formed between one end, facing the metal floor, of the auxiliary radiation arm and the metal floor, one end, facing the top wall, of the auxiliary radiation arm extends to the top wall, the auxiliary radiation arm, the third gap and the metal floor form a filtering structure together, the auxiliary radiation arm is enabled to be coupled and fed into high-frequency-band signal current, low-frequency signal current is filtered, and therefore electromagnetic wave signals of a high frequency band are excited through the auxiliary radiation arm.

In an optional implementation manner, the annular sidewall includes a first sidewall, a second sidewall, and a third sidewall that 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, an opening is formed in a gap between one ends, away from the second side wall, of the first side wall and one end, away from the second side wall, of the third side wall, and the first side wall, the second side wall and the third side wall are all configured into a plane structure.

This application embodiment connects gradually through three plane lateral wall and forms annular lateral wall, is ensureing that this annular lateral wall, roof and metal floor enclose synthetic one side opening, five confined radiation cavities to improve the forward gain of 2.4Gwifi frequency channel, when reducing the directivity factor of 2.4Gwifi frequency channel of antenna device, simplified the structure of main radiation arm, thereby improved antenna device's preparation efficiency.

In an alternative implementation manner, the feeding structure is positioned between the secondary radiation arm of the antenna device and the third side wall of the annular side wall, the distance between the secondary radiation arm and the third side wall is 1/3-1/2 of the distance between the first side wall and the third side wall of the annular side wall, and the distance between the feeding structure and the third side wall is smaller than 1/3 of the distance between the first side wall and the third side wall;

or the feeding structure is located between the secondary radiating arm and the first side wall, the distance between the secondary radiating arm and the first side wall is 1/3-1/2 of the distance between the first side wall and the third side wall, and the distance between the feeding structure and the first side wall is smaller than 1/3 of the distance between the first side wall and the third side wall.

This application embodiment is through arranging feed structure and auxiliary radiation arm above-mentioned settlement position between the first lateral wall of annular lateral wall and third lateral wall respectively for this antenna device excites four different radiation modes, produces four resonance points, covers 2.4GHz, 3.6GHz, 5GHz and 5.5GHz, makes the antenna device of this application embodiment not only can be applied to and covers wifi 2.4G and wifi 5G, also can be applied to the NR frequency channel, covers the N41 frequency channel, N78 frequency channel and N79 frequency channel.

In an alternative implementation mode, the feeding structure is located between the secondary radiation arm and a third side wall of the annular side wall of the antenna device, the distance between the secondary radiation arm and the third side wall is 1/3-1/2 of the distance between the first side wall and the third side wall of the annular side wall, and the distance between the feeding structure and the third side wall is 1/3-1/2 of the distance between the first side wall and the third side wall;

or the feeding structure is positioned between the secondary radiating arm and the first side wall, the distance between the secondary radiating arm and the first side wall is 1/3-1/2 of the distance between the first side wall and the third side wall, and the distance between the feeding structure and the first side wall is 1/3-1/2 of the distance between the first side wall and the third side wall.

The feeding structure and the auxiliary radiating arm are respectively arranged at the set positions between the first side wall and the third side wall of the annular side wall, so that the antenna device excites five different radiation modes, five resonance points are generated, and the antenna device covers 2.45GHz, 3.9GHz, 4.9GHz, 5.5GHz and 6.4GHz, can be applied to coverage of wifi 2.4G and wifi 5G, can also be applied to an NR frequency band, covers an N41 frequency band, an N78 frequency band and an N79 frequency band, and can also be applied to future sub 8G, wifi 6 and the like.

In an alternative implementation manner, the side wall of the secondary radiation arm of the antenna device has an external thread, the top wall or the metal floor has an internal thread, and the secondary radiation arm is in threaded connection with the top wall or the metal floor.

This application embodiment is through setting up the external screw thread on vice radiating arm, set up the internal thread on antenna device's roof or metal floor, thus, when vice radiating arm and roof screw-thread fit are connected, accessible revolute pair radiating arm, with the distance between this pair of radiating arm and the metal floor of stable regulation, thereby the electromagnetic wave frequency channel that quick adjustment pair radiating arm excited, or when vice radiating arm and metal floor screw-thread fit are connected, accessible revolute pair radiating arm, with the distance between this pair of radiating arm and the roof of stable regulation, thereby the electromagnetic wave frequency channel that quick adjustment pair radiating arm excited, not only conveniently adjust the height of vice radiating arm one end, and simplified vice radiating arm and metal floor or with the connection structure between the roof, thereby whole antenna device's assembly efficiency has been improved. In addition, the connection strength between the secondary radiation arm and the metal floor or between the secondary radiation arm and the top wall is enhanced.

The embodiment of the application also provides electronic equipment, which comprises an electronic equipment body and at least one antenna device;

the antenna device is fixed on a back plate of the electronic equipment body, and an opening of the antenna device faces any side edge of the back plate.

This application embodiment is through setting up above-mentioned antenna device on the backplate of electronic equipment body for the electromagnetic wave of antenna device radiation department passes through antenna device's opening radiation to electronic equipment to a great extent before the screen, and because of the blockking of antenna device's annular lateral wall, has reduced the electromagnetic wave to other regional radiations effectively, thereby has improved the preceding gain on 2.4Gwifi frequency channel and other frequency channels of antenna device, has reduced the directivity coefficient on 2.4Gwifi frequency channel and other frequency channels of antenna device. In addition, the antenna device is arranged to be a cavity structure with an opening on the side wall, so that a plurality of resonance points can be excited in the feeding process, the bandwidth of the antenna device is widened, more frequency bands can be covered by the antenna device, the antenna performance of the antenna device is improved, and the display performance and the function requirements of the electronic equipment are further optimized.

In an alternative implementation manner, the back plate is a metal back plate, and the metal back plate is configured as a metal floor of the antenna device to simplify the structures of the antenna device and the electronic device, so that the manufacturing cost of the electronic device is reduced, the assembly efficiency of the electronic device is improved, and the weight of the electronic device is reduced.

In an alternative implementation manner, the number of the antenna devices is at least two, and at least two antenna devices are respectively arranged on two adjacent sides of the back plate.

According to the embodiment of the application, at least one antenna device is arranged on two adjacent sides of the back plate respectively, so that the two antenna devices can form a wifi MIMO layout, the radiation intensity of the antenna devices on the electronic equipment is enhanced, the coverage frequency band of the antenna devices on the electronic equipment is widened simultaneously, and the signal transmission performance of the electronic equipment is improved. In addition, each antenna device is a cavity structure with an opening on one side, so that the isolation between the antenna devices is improved, and signal interference among the antennas is avoided. Meanwhile, far field patterns of two antenna devices positioned on two adjacent sides are complementary, so that the continuity of the formed wifi MIMO antenna coverage frequency band is ensured.

In an alternative implementation, the horizontal distance between at least two antenna devices is at least 18mm, and the vertical distance between at least two antenna devices is at least 27mm, so as to further improve the isolation between the two antenna devices and ensure that the two antenna devices do not interfere with each other.

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

According to the embodiment of the application, the plurality of antenna devices are arranged on one side edge of the back plate at intervals, the space of the back plate of the electronic equipment is reasonably utilized, the radiation intensity of the antenna devices on the electronic equipment is further enhanced, meanwhile, the coverage frequency band of the antenna devices on the electronic equipment is widened, for example, one part of the antenna devices can be used as wifi antennas to optimize the signal transmission performance between the antenna devices and a router, and the other part of the antenna devices can be used as Bluetooth antennas to optimize the signal transmission performance between the antenna devices and a remote controller. In addition, due to the structural characteristics of each antenna device, the isolation between two adjacent antenna devices is ensured, and mutual interference among the antenna devices is avoided.

Drawings

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

FIG. 2 is a schematic diagram of a first configuration of the antenna apparatus of FIG. 1;

FIG. 3 is a front view of FIG. 2;

FIG. 4 is a top view of FIG. 2;

FIG. 5 is a simulated far field pattern of FIG. 2;

fig. 6(a) is the planar pattern of fig. 5 at phi 90 °;

FIG. 6(b) is the plan view of FIG. 5 at theta 90;

FIG. 7 is a schematic view of a portion of the structure of FIG. 3;

FIG. 8 is a second schematic diagram of the antenna assembly of FIG. 1;

FIG. 9 is a front view of FIG. 8;

FIG. 10 is a schematic diagram of a third configuration of the antenna apparatus of FIG. 1;

fig. 11 is a graph of the radiation effect of the antenna of fig. 8;

FIG. 12(a) is a graph of simulated electric field of FIG. 11 with a resonance point of 2.45 GHz;

FIG. 12(b) is a graph of simulated electric field of FIG. 11 with a resonance point of 3.6 GHz;

FIG. 12(c) is a graph of simulated electric field of FIG. 11 with a resonance point of 5 GHz;

FIG. 12(d) is a graph of the simulated electric field of FIG. 11 with a resonance point of 5.5 GHz;

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

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

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

FIG. 15 is a graph of the antenna assembly of FIG. 14 after being interfered by a horizontally polarized interferer;

FIG. 16 is a schematic diagram of an interference source with vertical polarization on a backplane of the electronic device of FIG. 1;

FIG. 17 is a graph of the antenna assembly of FIG. 16 after being interfered by vertically polarized interferers;

FIG. 18 is a schematic diagram of a fourth configuration of the antenna assembly of FIG. 1;

FIG. 19 is a front view of FIG. 18;

fig. 20 is a graph of the radiation effect of the antenna of fig. 18;

FIG. 21(a) is a graph of simulated electric field of FIG. 20 with a resonance point of 2.45 GHz;

FIG. 21(b) is a graph of simulated electric field of FIG. 20 with a resonance point of 3.9 GHz;

FIG. 21(c) is a graph of simulated electric field of FIG. 20 with a resonance point of 4.9 GHz;

FIG. 21(d) is a graph of simulated electric field of FIG. 20 with a resonance point of 5.5 GHz;

FIG. 21(e) is a graph of simulated electric field at the resonance point of 6.4GHz in FIG. 20;

FIG. 22 is a schematic view of the antenna assembly of FIG. 1 positioned outside of two pedestals;

fig. 23 is a graph of the antenna radiation effect of the antenna device of fig. 22 in different positions;

FIG. 24 is a schematic view of the antenna assembly of FIG. 1 positioned between two pedestals;

fig. 25 is a schematic diagram of a second structure of an electronic device according to an embodiment of the present application;

fig. 26 is a diagram of the antenna radiation effect of the two antenna devices of fig. 25;

fig. 27 is a simulated far field pattern for the first antenna assembly of fig. 25;

fig. 28 is a simulated far field pattern of the second antenna assembly of fig. 25;

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

fig. 30 is a diagram of the antenna radiation effect of the three antenna arrangement of fig. 29.

Description of reference numerals:

10-an electronic device;

1-an antenna device; 100-electronic device body; 200-an antenna arrangement;

110-a back-plate; 120-a base; 210-metal floor; 220-a main radiating arm; 230-a feed structure; 240-feed port; 250-secondary radiating arm; 260-a first interference source; 270-a second interference source; 201-a first antenna means; 202-a second antenna arrangement; 203-third antenna means;

121-a first base; 122-a second base; 221-annular side wall; 222-a top wall; 223-a radiation chamber; 224-an opening; 225-a first gap; 226-a second gap; 227-a third gap; 231 — first part; 232-a second portion; 233-third part;

2211-a first sidewall; 2212-second side wall; 2213-third side wall.

Detailed Description

The terminology used in the description of the embodiments section of the present application is for the purpose of describing particular embodiments of the present application only and is not intended to be limiting of the present application.

Fig. 1 is a schematic structural diagram of a first electronic device according to an embodiment of the present application. Referring to fig. 1, in general, an antenna apparatus is provided on an electronic device such as a television set, and signals are transmitted or received through the antenna apparatus to realize information transfer with a router, a remote controller, other remote devices, and the like.

Taking a television as an example, with the development of a 5G communication system, 5G antenna equipment is applied to a large-screen television, for example, 5G antenna equipment having the characteristics of being capable of completing large data volume transmission, having an ultra-large network capacity and the like is arranged on the television to receive or send signals, so that information transmission with other equipment and the like is realized, and thus, the requirements of people on ultra-high definition videos, cloud games, VR experiences, television remote education and the like are met.

In the conventional technology, a large-screen television includes a television body and an antenna device, the antenna device is disposed on a back plate of the television body, and the antenna device is located at a position of the back plate near a corner of the bottom. Currently, an Antenna device is usually an Inverted F Antenna (IFA) or a planar Inverted F Antenna (PPIFA), and electromagnetic waves are radiated in various directions by a radiator of the IFA/PIFA Antenna, so that part of the electromagnetic waves emitted by the Antenna device can be radiated to the front of a screen of a television body through a side of the television body, thereby achieving a purpose of transmitting signals through a position in front of the screen.

Taking the IFA antenna as an example, the IFA antenna includes a metal floor and a radiator that are oppositely disposed along the thickness direction of the television body, the metal floor is disposed on the back plate of the television body, the back plate of the television body can be directly used as the metal floor of the IFA antenna, and a feed structure, a ground short-circuit leg and a parasitic structure are disposed between the metal floor and the radiator. The feeding structure is arranged at one end of the radiating body, one end of the feeding structure is connected with the radiating body, the other end of the feeding structure is electrically connected with a signal emission source in the television body through a feeding port on the metal floor, therefore, the signal emission source feeds signal current to the antenna radiating body through the feeding port and the feeding structure, and the antenna radiating body then transmits the signal current to the receiving end in an electromagnetic wave mode.

The two ends of the grounding short circuit leg are respectively connected with the radiating body and the metal floor, the bottom of the parasitic structure is connected with the metal floor, and a certain gap is formed between the top of the parasitic structure and the radiating body, so that the radiating body feeds signal current into the parasitic structure in a gap coupling feed mode, and the parasitic structure transmits the signal current in an electromagnetic wave mode, so that the bandwidth of the IFA antenna is widened.

Based on the above, the conventional antenna device, such as an IFA antenna, has an open structure, that is, an opening structure is formed between the radiator and the metal floor, and there is no side shielding part, so that the electromagnetic waves excited by the radiator and the parasitic structure are uniformly radiated out from a circle of the IFA antenna, and thus the directivity coefficient of the 2.4 wifi frequency band of the antenna device is high, and only part of the electromagnetic waves are radiated to the front of the screen from the side of the television, thereby reducing the forward gain, and affecting the performance of the front-screen antenna of the electronic device such as the television. The 2.4Gwifi frequency band directivity coefficient of the traditional antenna equipment is 7.1dBi, and the forward gain is-2.4 dBi. It should be noted that the forward gain refers to the gain of electromagnetic waves radiated to the front of the screen of the large-screen television set by the antenna.

The embodiment of the application provides an antenna device and electronic equipment, set up to include annular lateral wall and roof through the main radiation arm with antenna device, and make annular lateral wall, roof and metal floor enclose jointly and become one side and have the open-ended radiation cavity, like this, after feed structure in the radiation cavity feeds in signal current to main radiation arm, just electromagnetic wave in the radiation cavity is preceding to the screen of electronic equipment through the opening radiation on the annular lateral wall to the bigger degree, and because of the blockking of annular lateral wall, electromagnetic wave to other regional radiations has been reduced effectively, thereby the forward gain of 2.4Gwifi frequency channel and other frequency channels of antenna device has been improved, the directivity coefficient of 2.4Gwifi frequency channel and other frequency channels of antenna device has been reduced.

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

Example one

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 3, an embodiment of the present application provides an antenna device 200, where the antenna device 200 is fixed on a back plate 110 of an electronic device 10. It is understood that the electronic device 10 includes the electronic device body 100, the back plate 110 of the electronic device 10 and the screen of the electronic device 10 are respectively disposed on two side surfaces of the electronic device body 100 along the thickness direction, and the antenna device 200 is fixed on the back plate 110 of the electronic device body 100.

It should be noted that the electronic device 10 of the embodiment of the present application may include, but is not limited to, a mobile or fixed terminal having an antenna apparatus 200 and a screen, such as a television, a mobile phone, a tablet computer, a notebook computer, an ultra-mobile personal computer (UMPC), a handheld computer, an intercom, a netbook, a POS machine, a Personal Digital Assistant (PDA), a wearable device, a virtual reality device, and the like.

The embodiments of the present application describe a specific television as an example. In practical application, the tv body of the tv further includes a plurality of bases 120 disposed at intervals at the bottom of the back plate 110, and the tv is stably fixed on a fixing surface such as a wall surface through the bases 120. The antenna device 200 of the embodiment of the present application may be fixed on the back plate 110.

Illustratively, the antenna device 200 may be fixed on any side of the back plate 110, so as to shorten a path of electromagnetic waves emitted by the antenna device 200 to the front of the screen of the television, and reduce loss of the antenna device 200 on the radiation path, thereby improving the forward gain of the antenna device 200 and optimizing the performance of the front-screen antenna of the television. For example, the antenna device 200 may be fixed on one side of the back plate 110 far from the base 120, or may be fixed on one side of the back plate 110 near the base 120, and the embodiment of the present application does not specifically limit the position of the antenna device 200.

Referring to fig. 2 and 3, an antenna device 200 according to an embodiment of the present invention includes a metal ground plate 210, a main radiating arm 220, and a feeding structure 230. The metal floor 210 is fixed to the back plate 110 of the electronic device 10, the main radiating arm 220 includes an annular side wall 221 and a top wall 222, the top wall 222 is disposed opposite to the metal floor 210, that is, the top wall 222 is located on a side of the metal floor 210 facing away from the back plate 110, one end of the annular side wall 221 is connected to the top wall 222, and the other end of the annular side wall 221 is connected to the metal floor 210, that is, the annular side wall 221 is located between the top wall 222 and the metal floor 210, and two ends of the annular side wall 221 in a height direction (as shown in a y direction in fig. 2) are respectively connected to the top wall 222 and the metal floor 210, so that the annular side wall 221, the top wall 222 and the metal floor 210 of the main radiating arm 220 enclose a cavity structure, and the cavity is a radiating cavity 223 of the antenna apparatus 200.

The annular side wall 221 can be detachably fixed on the metal floor 210 by screws or clamping, so as to ensure that the annular side wall 221 and the metal floor 210 are electrically connected, and simultaneously, the annular side wall 221 and the metal floor 210 can be replaced independently.

Referring to fig. 2, the annular sidewall 221 has an opening 224, for example, one or more strip-shaped slits may be provided on a surface of the annular sidewall 221 facing the edge of the backplate 110, and the strip-shaped slits may be used as the opening 224, or a through hole having a circular shape, a square shape, or the like may be provided on a surface of the annular sidewall 221 facing the edge of the backplate 110, and the through hole may be used as the opening 224.

Thus, the antenna device 200 is formed in a structure in which the side portions are open and the remaining portions are closed. When the antenna device 200 is mounted on the back plate 110 of the electronic apparatus 10, such as a television, the opening 224 faces the edge of the back plate 110 of the television, for example, when the antenna device 200 is located at the first edge of the back plate 110, the opening 224 of the annular sidewall 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 screen of the television through the opening 224.

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

When specifically arranged, the annular sidewall 221 of the embodiment of the present application may be an arc-shaped sidewall that is circumferentially arranged around one of the axes perpendicular to the metal floor 210, so that the annular sidewall 221 has a cylindrical structure.

Fig. 4 is a top 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 connected in sequence, the first sidewall 2211 and the third sidewall 2213 are disposed opposite to each other, the second sidewall 2212 is disposed between the first sidewall 2211 and the third sidewall 2213, a gap between ends of the first sidewall 2211 and the third sidewall 2213 far away from the second sidewall 2212 forms an opening 224, and the first sidewall 2211, the second sidewall 2212, and the third sidewall 2213 are all configured in a planar structure.

This application embodiment connects gradually through three plane lateral wall and forms annular lateral wall 221, is guaranteeing that this annular lateral wall 221, roof 222 and metal floor 210 enclose synthetic one side opening, five confined radiation cavity 223 to improve the forward gain of 2.4Gwifi frequency channel, when reducing the directivity factor of the 2.4Gwifi frequency channel of antenna device 200, simplified the structure of main radiating arm 220, thereby improved antenna device 200's preparation efficiency.

It is understood that the main radiating arm 220 of the present embodiment may be a metal member such as copper, aluminum, etc. to ensure the passage of current.

The feeding structure 230 of the embodiment of the present application is located in the radiation cavity 223 enclosed by the main radiation arm 220 and the metal ground 210, and the feeding structure 230 is used for feeding a signal current into the main radiation arm 220.

For example, referring to fig. 3, a feeding port 240 is formed on the metal floor 210, one end of the feeding port 240 is electrically connected to a signal emitting source (not shown) inside the electronic device 10, one end of the feeding structure 230 is connected to the feeding port 240, and the other end of the feeding structure is connected to the main radiating arm 220, such as the top wall 222, so that the signal emitting source can feed a signal current to the main radiating arm 220 through the feeding port 240 and the feeding structure 230, so that the main radiating arm 220 generates an electromagnetic wave, and the signal current on the main radiating arm 220 can excite the radiating cavity 223 to generate an electromagnetic wave.

When the power feeding port 240 is specifically configured, a mounting hole may be formed in the metal floor 210, and one end of the power feeding port 240 is electrically connected to the power feeding structure 230, and the other end of the power feeding port passes through the mounting hole and is electrically connected to a signal emission source inside the electronic device 10, such as a television. The specific structure of the feeding port 240 can directly refer to the feeding port on the conventional antenna structure, and is not described herein again.

Since the annular sidewall 221, the top wall 222 and the metal floor 210 of the embodiment of the present application jointly enclose the radiation cavity 223 having the opening 224 on one side, that is, one side of the radiation cavity 223 is open, and the rest is closed, when the feeding structure 230 in the radiation cavity 223 feeds signal current to the main radiation arm 220, electromagnetic waves in the main radiation arm 220 and the radiation cavity 223 are radiated out through the opening 224 on the annular sidewall 221 to a greater extent, and then are radiated to the front of the screen of the television through the side of the television, and due to the blocking of the annular sidewall 221, electromagnetic waves radiated to other areas are effectively reduced, so that the forward gains of the 2.4 wifi frequency band and other frequency bands of the antenna device 200 are improved, and the directivity coefficients of the 2.4 wifi frequency band and other frequency bands of the antenna device 200 are reduced.

Fig. 5 is a 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 (e.g., x-y plane in fig. 5), and simulation experiments show that the directivity coefficient of the antenna device 200 according to the embodiment of the present application is 5.9dBi, which is optimized by 1.2dBi compared with the conventional antenna device.

Fig. 6(a) is the plan view of fig. 5 at phi 90 °, and fig. 6(b) is the plan view of fig. 5 at theta 90 °. Referring to fig. 6(a) and 6(b), a curve at point a is a plane direction curve of a conventional antenna device, and a curve at point b is a plane direction curve of the antenna apparatus 200 according to the embodiment of the present application. Referring to fig. 6(a), the forward gain at point a is-2.418 dB, and the forward gain at point b is 0.9796dB, which illustrates that the antenna device 200 of the embodiment of the present application optimizes 3.3976dB compared with the conventional technology. Referring to fig. 6(b), the forward gain at point a is-2.393 dB, and the forward gain at point b is 0.9476dB, which illustrates that the antenna device 200 of the embodiment of the present application is optimized by 3.34dB compared with the conventional technology.

Meanwhile, the antenna device 200 is configured as a cavity structure with an opening 224 on a side wall thereof, and a plurality of resonance points can be excited in a feeding process, so that the bandwidth of the antenna device 200 is widened, more frequency bands can be covered by the antenna device, and the antenna performance of the antenna device 200 is improved.

Specifically, the feeding structure 230 of the embodiment of the present application may be a feeding line, or may be a feeding metal part.

Fig. 7 is a partial structural schematic view 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, for example, the feeding structure 230 may include a first portion 231, a second portion 232, and a third portion 233 connected in sequence, the second portion 232 is disposed opposite to the metal floor 210, and one ends of the first portion 231 and the third portion 233 away from the second portion 232 extend toward the metal floor 210.

The metal ground plane 210 has a power feeding port 240, one of the first and

third portions

231 and 233 is connected to the power feeding port 240, and the other of the first and

third portions

231 and 233 is connected to the metal ground plane 210. For example, an end of the first portion 231 remote from the second portion 232 is connected to the feeding port 240, such that the end of the first portion 231 is electrically connected to the signal emission source through the feeding port 240, thereby feeding the signal current to the feeding structure 230 through the feeding port 240, and then feeding the signal current to the main radiating arm 220 through the feeding structure 230. An end of the third portion 233 remote from the second portion 232 is connected to the metal floor 210 to ground the feed structure 230. For example, the third portion 233 may be fixed to the metal floor 210 by means of a snap or screw connection.

Wherein the second portion 232 has a first gap 225 with the top wall 222 of the main radiating arm 220, so that a signal current on the second portion 232 can flow through the entire main radiating arm 220 and the radiating cavity 223 by breaking the first gap 225 to feed the signal current to the top wall 222 of the main radiating arm 220, thereby realizing gap-coupled feeding between the feeding structure 230 and the main radiating arm 220.

Of course, the second portion 232 may also be directly attached to the top wall 222 of the main radiating arm 220, so that the signal current on the second portion 232 is directly fed to the top wall 222 of the main radiating arm 220, and thus flows in the whole main radiating arm 220 and the radiating cavity 223.

In the embodiment of the present application, the feeding structure 230 is set to be similar to an inverted "U" shaped structure, such that one end of the feeding structure 230 is connected to the feeding port 240, and the other end is connected to the metal floor 210, which is beneficial to impedance matching of the feeding structure 230, reduces power loss in the feeding structure 230, effectively reduces return loss of the antenna apparatus 200 in the embodiment of the present application, and improves antenna gain.

In other examples, the feeding structure 230 may have an "L" shape, for example, as shown in fig. 7, the feeding structure 230 may only include a first portion 231 and a second portion 232 connected in sequence, the first portion 231 extends toward the metal floor 210, the second portion 232 is located at an end of the first portion 231 close to the top wall 222, and the second portion 232 and the first portion 231 form an included angle, for example, the included angle between the second portion 232 and the first portion 231 is 90 °. Wherein, a gap is formed between the second portion 232 and the top wall 222, and an end of the first portion 231 away from the second portion 232 is connected to the feeding port 240 on the metal floor 210, so as to ensure that the signal current is fed into the feeding structure 230, and simultaneously the signal current on the second portion 232 is fed onto the top wall 222 by means of gap feeding.

In addition, the feeding structure 230 may also be a direct feeding and capacitance structure, and the specific structure and feeding distance thereof may refer to the conventional technology directly, which is not described herein again.

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 9, the antenna device 200 of the embodiment of the present application may further include a sub-radiating arm 250, and the sub-radiating arm 250 is disposed in the radiating cavity 223.

As shown in fig. 8 and 9, in a specific configuration, an end of the secondary radiating arm 250 facing the metal floor 210 may extend onto the metal floor 210, and a second gap 226 is provided between an end of the secondary radiating arm 250 facing the top wall 222 and the top wall 222, for example, a bottom of the secondary radiating arm 250 is fixed on the metal floor 210, and the second gap 226 is formed between a top of the secondary radiating arm 250 and the top wall 222, so that a signal current on the top wall 222 may be fed onto the secondary radiating arm 250 through the second gap 226, so that a signal current is formed on the secondary radiating arm 250, and electromagnetic waves are radiated, so that the antenna device 200 excites more resonance points, the bandwidth of the entire antenna device 200 is widened, the antenna device 200 can cover more frequency bands, and the utilization rate of the antenna device 200 is improved.

In addition, when the end of the secondary radiating arm 250 facing the metal floor 210 may extend onto the metal floor 210 and a second gap 226 is formed between the end of the secondary radiating arm 250 facing the top wall 222 and the top wall 222, the secondary radiating arm 250, the second gap 226 and the top wall 222 form a filter structure, so that the secondary radiating arm 250 is coupled to feed a high-frequency signal current, and filters a low-frequency signal current, thereby exciting an electromagnetic wave signal in a high-frequency band through the secondary radiating arm 250. The smaller the distance between the second gaps 226 is, the larger the projection area of the sub-radiating arm 250 onto the top wall 222 is, and the higher the frequency band of the signal current coupled and fed by the sub-radiating arm 250 is.

It is understood that the filtering principle of the filtering structure can be directly referred to the conventional antenna technology, and is not described herein.

Fig. 10 is a third structural diagram of the antenna device in fig. 1. Referring to fig. 10, in some examples, an end of the secondary radiating arm 250 facing the top wall 222 may extend onto the top wall 222, and a third gap 227 is provided between the end of the secondary radiating arm 250 facing the metal floor 210 and the metal floor 210, so that a signal current on the metal floor 210 may be fed to the secondary radiating arm 250 through the third gap 227, so that a signal current is formed on the secondary radiating arm 250, and an electromagnetic wave is radiated, thereby exciting more resonance points of the antenna device 200.

Meanwhile, the auxiliary radiating arm 250, the third gap 227 and the metal floor 210 together form a filtering structure, so that the auxiliary radiating arm 250 is coupled to feed in a high-frequency signal current, and filters a low-frequency signal current, thereby exciting a high-frequency electromagnetic wave signal through the auxiliary radiating arm 250. It can be understood that the smaller the spacing of the third gap 227, the larger the projection area of the sub-radiating arm 250 onto the metal floor 210, and the higher the frequency band of the signal current fed by the sub-radiating arm 250.

Of course, in other examples, the sub-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 sub-radiating arm 250 and the top wall 222, and there is a gap between the bottom of the sub-radiating arm 250 and the metal floor 210, so as to ensure that not only the signal current on the main radiating arm 220 is fed into the sub-radiating arm 250 through gap feeding, but also the antenna apparatus 200 forms two filtering structures, so that the sub-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 is understood that the sub radiating arm 250 may be spaced apart from the second side wall 2212 of the annular side wall 221. Of course, the sub radiating arm 250 may also contact the second side wall 2212 of the annular side wall 221, which is not limited by the embodiment of the present application.

The secondary radiating arm 250, when specifically configured, may be a metal block that is fastened to the metal floor 210 or the top wall 222 by means of a snap or screw connection.

In some examples, the side wall of the sub-radiating arm 250 has an external thread, the top wall 222 or the metal floor 210 has an internal thread, and the sub-radiating arm 250 is screwed with the top wall 222 or the metal floor 210, that is, when the sub-radiating arm 250 is assembled with the top wall 222, the sub-radiating arm 250 can be screwed with the top wall 222, and when the sub-radiating arm 250 is assembled with the metal floor 210, the sub-radiating arm 250 can be screwed with the metal floor 210. For example, the secondary radiating arm 250 may be a screw or a bolt, and a threaded hole is formed in the metal floor 210 or the top wall 222.

In the embodiment of the present application, the auxiliary radiating arm 250 is provided with an external thread, and the top wall 222 of the antenna device 200 or the metal floor 210 is provided with an internal thread, so that when the auxiliary radiating arm 250 is in threaded fit connection with the top wall 222, the auxiliary radiating arm 250 can be rotated to stably adjust the distance between the auxiliary radiating arm 250 and the metal floor 210, that is, to stably adjust the width of the third gap 227, thereby rapidly adjusting the frequency band of the electromagnetic wave excited by the auxiliary radiating arm 250.

When the sub-radiating arm 250 is in threaded fit connection with the metal floor 210, the distance between the sub-radiating arm 250 and the top wall 222, that is, the width of the second gap 226, can be stably adjusted by rotating the sub-radiating arm 250, so that the frequency band of the electromagnetic wave excited by the sub-radiating arm 250 can be rapidly adjusted, the height of one end of the sub-radiating arm 250 can be conveniently adjusted, the connection structure between the sub-radiating arm 250 and the metal floor 210 or the top wall 222 is simplified, and the assembly efficiency of the whole antenna device 200 is improved.

Note that the width of the second gap 226 refers to a distance between an end of the secondary radiating arm 250 facing the top wall 222 and the top wall 222. Accordingly, 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.

Referring to fig. 8 and 9, in the embodiment of the present application, the feeding structure 230 may be located between the sub-radiating arm 250 and the third side wall 2213 of the annular side wall 221, that is, the feeding structure 230 is disposed near the third side wall 2213, and the sub-radiating arm 250 is located at a side of the feeding structure 230 far from the third side wall 2213.

Of course, the feeding structure 230 may also be located between the sub-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 disposed near the first side wall 2211, and the sub-radiating arm 250 is located on the side of the feeding structure 230 far from the first side wall 2211.

Wherein, when the feeding structure 230 may be located between the sub-radiating arm 250 and the third side wall 2213 of the annular side wall 221, the distance between the sub-radiating arm 250 and the third side wall 2213 is 1/3-1/2 of the distance between the first side wall 2211 and the third side wall 2213 of the annular side wall 221, and the distance between the feeding structure 230 and the third side wall 2213 is smaller 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 third side wall 2213 is 1/2, 2/5 or 1/3 of the distance between the first side wall 2211 and the third side wall 2213 of the annular side wall 221, that is, the secondary radiating arm 250 is located at 1/2, 2/5 or 1/3 between the first side wall 2211 and the third side wall 2213, and the distance between the feeding structure 230 and the third side wall 2213 is 1/4, 1/5 or 1/6 of the distance between the first side wall 2211 and the third side wall 2213, that is, the feeding structure 230 is located at 1/4, 1/5 or 1/6 between the first side wall 2211 and the third side wall 2213. Illustratively, the secondary radiating arm 250 is located at 1/2 between the first and

third side walls

2211 and 2213, and the feed structure 230 is located at 1/4 between the first and

third side walls

2211 and 2213.

Accordingly, when the feeding structure 230 is located between the sub-radiating arm 250 and the first side wall 2211, the distance between the sub-radiating arm 250 and the first side wall 2211 is 1/3-1/2 of the distance between the first side wall 2211 and the third side wall 2213, and the distance between the feeding structure 230 and the first side wall 2211 is smaller than 1/3 of the distance between the first side wall 2211 and the third side wall 2213.

For example, the distance between the sub radiation arm 250 and the first side wall 2211 is 1/2, 2/5 or 1/3 of the distance between the first side wall 2211 and the first side wall 2211 of the annular side wall 221, that is, the sub 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 the distance between the feeding structure 230 and the first side wall 2211 is 1/4, 1/5 or 1/6 of the distance between the first side wall 2211 and the first side wall 2211, that is, the feeding structure 230 is located at 1/4, 1/5 or 1/6 between the first side wall 2211 and the first side wall 2211. Illustratively, the secondary radiating arm 250 is located at 1/2 between the first side wall 2211 and the first side wall 2211, and the feed structure 230 is located at 1/4 between the first side wall 2211 and the first side wall 2211.

Fig. 11 is a graph of the radiation effect of the antenna of fig. 8. Referring to fig. 11, a curve q1 is a S11 parameter curve of the antenna device 200 according to the embodiment of the present invention, and as can be seen from fig. 11, the antenna device 200 according to the embodiment of the present invention has four resonance points, including a resonance point c, a resonance point d, a resonance point e, and a resonance point f. Wherein, the frequency of the resonance point c is 2.45GHz, the frequency of the resonance point d is 3.6GHz, the frequency of the resonance point e is 5GHz, and the frequency of the resonance point f is 5.5 GHz.

Fig. 12(a) is a graph of the simulated electric field with the resonance point of 2.45GHz in fig. 11, fig. 12(b) is a graph of the simulated electric field with the resonance point of 3.6GHz in fig. 11, fig. 12(c) is a graph of the simulated electric field with the resonance point of 5GHz in fig. 11, and fig. 12(d) is a graph of the simulated electric field with the resonance point of 5.5GHz in fig. 11. Referring to fig. 12(a) to 12(d), the antenna device 200 according to the embodiment of the present application excites four radiation patterns during antenna radiation. In fig. 12(a) to 12(d), arrow R represents the flow of current.

Referring to fig. 12(a), in the radiation process, the antenna device 200 excites the TE10 mode at the open end of the cavity, in which the current at the open end of the cavity, i.e., the region a, flows in the same direction toward the top wall 222, and a current zero point occurs in the region, and the TE10 mode at the open end of the cavity forms the resonance point c, i.e., the TE10 mode at the open end of the cavity forms the 2.45GHz band.

Referring to fig. 12(B), the antenna device 200 excites a TE20 mode on the open side of the cavity during radiation, in which current flows in the direction of the metal floor 210 in the region B on the open side of the cavity, current flows in the direction of the top wall 222 in the region C on the open side of the cavity, and zero current appears in the regions B and C, and the TE20 mode on the open side of the cavity forms a resonance point d, i.e., the TE20 mode on the open side of the cavity forms a 3.6GHz band.

Referring to fig. 12(c), the antenna device 200 excites a TE20 mode fed to the first side wall 2211 during radiation, and in this mode, there are two spaced-apart regions, i.e., region E and region F, near the first side wall 2211. Wherein in the region E, the current flows towards the top wall 222, in the region F, the current flows towards the metal floor 210, and the zero point of the current appears in the regions E and F, the TE20 mode fed to the first side wall 2211 forms the resonance point E, i.e. the TE20 mode fed to the first side wall 2211 forms the 5GHz band.

Referring to fig. 12(d), the antenna device 200 excites a TE10 mode formed by feeding the sub radiation arm 250 during radiation, in which a current flows in the direction of the metal floor 210 in a region G located near the sub radiation arm 250 and a current zero point occurs in the region G, and the TE10 mode formed by feeding the sub radiation arm 250 forms a resonance point f, that is, the TE10 mode formed by feeding the sub radiation arm 250 forms a 5.5GHz band.

Based on the above, the feeding structure 230 and the sub-radiating arm 250 are respectively disposed at the set positions between the first side wall 2211 and the third side wall 2213 of the annular side wall 221, so that the antenna apparatus 200 excites four different radiation modes to generate four resonance points covering 2.45GHz, 3.6GHz, 5GHz and 5.5GHz, and the antenna apparatus of the embodiment of the present application can be applied to not only cover wifi 2.4G and wifi 5G, but also be applied to NR frequency band covering N41 frequency band, N78 frequency band and N79 frequency band. The frequency ranges of the N41 band, the N78 band and the N79 band may be used to directly query the existing data, and are not described herein again.

Fig. 13(a) is a current distribution diagram of the antenna device of fig. 1 during radiation, and fig. 13(b) is a current distribution diagram of the conventional antenna device during radiation. Referring to fig. 13(a), since the antenna device 200 of the embodiment of the present application is a cavity structure having an opening 224 on a side wall thereof, that is, other regions except the opening 224 are closed structures, distribution of signal current of the antenna device 200 is more concentrated. Referring to fig. 13(b), since the side of the conventional antenna apparatus 1 has a completely open structure, the distribution of the signal current of the antenna apparatus 1 is relatively dispersed. In fig. 13(a) and 13(b), the ripple p represents the signal current.

Based on the above, the distribution of the signal current of the antenna apparatus 200 of the embodiment of the present application is more concentrated than that of the conventional antenna device 1, so as to avoid interfering with signals of other devices of the television, such as other antennas. In addition, interference of an external environment, such as a horizontally polarized or vertically polarized antenna, to the antenna device 200 is reduced.

Fig. 14 is a schematic structural diagram of an interference source having horizontal polarization on a back plate of the electronic device in fig. 1, and fig. 15 is a diagram of an effect of the antenna device in fig. 14 after being interfered by the interference source having horizontal polarization. Referring to fig. 14, in order to verify the degree of interference of the external environment, such as a horizontally polarized antenna, to the antenna apparatus 200 according to the embodiment of the present application, a horizontally polarized interference source, i.e., a first interference source 260, is disposed on the back plate 110 of the electronic device 10, such as a television, and the first interference source 260 radiates electromagnetic waves to the external periphery.

Referring to fig. 15, a curve r1 is an S11 parameter curve of the conventional antenna apparatus after being interfered by the first interference source 260, and a curve S1 is an S11 parameter curve of the antenna apparatus 200 according to the embodiment of the present application after being interfered by the first interference source 260. It can be seen that, the return loss of the resonance point g with the frequency of 2.4GHz on the curve r1 is-29.19 dB, the return loss of the resonance point i with the frequency of 2.4GHz on the curve s1 is-34.765 dB, the return loss of the resonance point h with the frequency of 5.5GHz on the curve r1 is-31.747 dB, and the return loss of the resonance point j with the frequency of 5.5GHz on the curve s1 is-39.283 dB, so that the influence of polarization on different antenna devices is excluded, and at the resonance point with the same frequency, the return loss of the antenna device 200 of the embodiment of the present application is 7dB less than that of a conventional antenna apparatus, that is, when the distance between the first interference source 260 and the antenna device 200 of the embodiment of the present application is equal to the distance between the first interference source 260 and the conventional antenna apparatus, the receiving amount of the interference signal of the antenna device 200 of the embodiment of the present application is 7dB less.

Fig. 16 is a schematic structural diagram of an interference source having vertical polarization on a back plate of the electronic device in fig. 1, and fig. 17 is a diagram of an effect of the antenna device in fig. 16 after being interfered by the interference source having vertical polarization. Referring to fig. 16, in order to verify the degree of interference of the external environment, such as a vertically polarized antenna, to the antenna device 200 according to the embodiment of the present application, a second interference source 270, which is a vertically polarized interference source, is disposed on the back plate 110 of the electronic device 10, such as a television, and the second interference source 270 radiates electromagnetic waves to the outer periphery.

Referring to fig. 17, a curve r2 is an S11 parameter curve of the conventional antenna apparatus after being interfered by the second interference source 270, and a curve S2 is an S11 parameter curve of the antenna apparatus 200 according to the embodiment of the present application after being interfered by the second interference source 270. It can be seen that the return loss of the resonance point k with the frequency of 2.4GHz on the curve r2 is-30.649 dB, the return loss of the resonance point m with the frequency of 2.4GHz on the curve s2 is-37.181 dB, the return loss of the resonance point l with the frequency of 5.6GHz on the curve r2 is-33.267 dB, and the return loss of the resonance point n with the frequency of 5.6GHz on the curve s2 is-40.435 dB, so that the influence of polarization on different antenna devices is excluded, and at the resonance point with the same frequency, the antenna device 200 of the embodiment of the present application has a return loss smaller than that of a conventional antenna apparatus by 7dB, that is, when the distance between the second interference source 270 and the antenna device 200 of the embodiment of the present application is equal to the distance between the second interference source 270 and the conventional antenna apparatus, the receiving amount of the interference signal by 7dB is smaller by the antenna device 200 of the embodiment of the present application.

As can be seen from this, the antenna device 200 according to the embodiment of the present application can reduce reception of the interference signal in practical use.

Example two

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. Referring to fig. 18 and 19, unlike the first embodiment, a distance m2 between the feeding structure 230 and the sub-radiating arm 250 is smaller than a distance m1 between the feeding structure 230 and the sub-radiating arm 250 in the first embodiment, that is, a distance between the feeding structure 230 and the sub-radiating arm 250 is smaller than a distance between the feeding structure 230 and the sub-radiating arm 250 in the first embodiment.

Note that the distance between the feed structure 230 and the sub-radiation arm 250 refers to a distance between a side of the feed structure 230 facing the sub-radiation arm 250 and a side of the sub-radiation arm 250 facing the feed 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 1/3-1/2 of the distance between the first side wall 2211 and the third side wall 2213 of the annular side wall 221, and the distance between the feeding structure 230 and the third side wall 2213 is 1/3-1/2 of the distance between the first side wall 2211 and the third side wall 2213;

when specifically arranged, the distance between the sub radiation arm 250 and the third side wall 2213 is 1/2, 2/5 or 1/3 of the distance between the first side wall 2211 and the third side wall 2213 of the annular side wall 221, that is, the sub 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 the distance between the feeding structure 230 and the third side wall 2213 is 1/2, 2/5 or 1/3 of the distance between the first side wall 2211 and the third side wall 2213, that is, the feeding structure 230 is located at 1/2, 2/5 or 1/3 between the first side wall 2211 and the third side wall 2213. Illustratively, secondary radiating arm 250 is located at 1/2 between first and

third side walls

2211 and 2213, and feed structure 230 is located at 1/3 between first and

third side walls

2211 and 2213.

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

Specifically, when the arrangement is made, the distance between the sub radiation arm 250 and the first side wall 2211 is 1/2, 2/5 or 1/3 of the distance between the first side wall 2211 and the third side wall 2213 of the annular side wall 221, that is, the sub 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 the distance between the feeding structure 230 and the first side wall 2211 is 1/2, 2/5 or 1/3 of the distance between the first side wall 2211 and the third side wall 2213, that is, the feeding structure 230 is located at 1/2, 2/5 or 1/3 between the first side wall 2211 and the third side wall 2213. Illustratively, secondary radiating arm 250 is located at 1/2 between first and

third side walls

2211 and 2213, and feed structure 230 is located at 1/3 between first and

third side walls

2211 and 2213.

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

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

As shown in fig. 21(a), the antenna device 200 excites a TE10 mode at the open end of the cavity during radiation, in which the current in the region H at the open end of the cavity flows in the same direction and all flows toward the top wall 222, and a current zero point occurs in the region, and the TE10 mode at the open end of the cavity forms a resonance point s, that is, the TE10 mode at the open end of the cavity forms a 2.45GHz band.

Referring to fig. 21(b), the antenna device 200 excites a TE20 mode on the open side of the cavity during radiation, in which a current flows in the direction of the metal floor 210 in the region I on the open side of the cavity, a current flows in the direction of the top wall 222 in the region J on the open side of the cavity, and zero current points occur in the regions I and J, and the TE20 mode on the open side of the cavity forms a resonance point t, i.e., the TE20 mode on the open side of the cavity forms a 3.9GHz band.

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

Referring to fig. 21(d), the antenna device 200 excites a TE30 mode formed by feeding the secondary radiating arm 250 during radiation, in which there are three spaced regions, i.e., a region M, a region N, and a region O, in the vicinity of the secondary radiating arm 250, current flows in the direction of the top wall 222 in the region M, current flows in the direction of the metal floor 210 in the region N, current flows in the direction of the top wall 222 in the region O, and current zero points occur in all of the regions M, the region N, and the region O, and the TE30 mode formed by feeding the secondary radiating arm 250 forms a resonance point v, that is, the TE30 mode formed by feeding the secondary radiating arm 250 forms a 5.5GHz band.

Referring to fig. 21(e), the antenna device 200 excites a TE20 mode formed by feeding to the first side wall 2211 during radiation, and in this mode, there are two spaced regions, i.e., a region P and a region Q, near the first side wall 2211. The current in the region P and the region Q both flow in the direction of the metal floor 210, and a current zero point appears in the region P and the region Q, the TE20 mode fed to the first side wall 2211 forms a resonance point w, i.e. the TE20 mode fed to the first side wall 2211 forms a 6.4GHz band.

Based on the above, in the embodiment of the present application, the feeding structure 230 and the auxiliary radiating arm 250 are respectively disposed at the set positions between the first side wall 2211 and the third side wall 2213 of the annular side wall 221, so that the antenna apparatus 200 excites five different radiation modes to generate five resonance points covering 2.45GHz, 3.9GHz, 4.9GHz, 5.5GHz, and 6.4GHz, so that the antenna apparatus 200 can be applied to not only wifi 2.4G and wifi 5G, but also NR frequency bands covering N41 frequency band, N78 frequency band, N79 frequency band, and also sub 8G and wifi 6 in the future.

EXAMPLE III

The embodiment of the present application further provides an electronic device 10, which includes an electronic device body 100 and at least one antenna apparatus 200. The antenna device 200 may be the antenna device 200 in any of the above 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 radiating cavity 223 of the antenna device 200 are radiated out through the opening 224 to a greater extent, and then are radiated to the front of the screen of the electronic device 10 through the side of the electronic device 10.

Illustratively, the antenna device 200 may be fixed on any side of the back plate 110, so as to shorten a path of electromagnetic waves emitted by the antenna device 200 to the front of the screen of the television, and reduce loss of the antenna device 200 on the radiation path, thereby improving the forward gain of the antenna device 200 and optimizing the performance of the front-screen antenna of the television.

Fig. 22 is a schematic structural view of the antenna device in fig. 1 located outside two bases. Referring to fig. 1 and 22, taking a television as an example, in practical application, the television body of the television further includes a plurality of bases 120 disposed at intervals at the bottom of the back plate 110, and the electronic device 10 is stably fixed on a fixed surface such as a wall surface through the bases 120. For example, two bases 120 may be disposed at an interval at the bottom of the back plate 110 of the television, and for convenience of description, 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 to any one of the left, right, and upper sides of the back plate 110. As shown in fig. 22, in some examples, the antenna device 200 may also be fixed on the bottom edge of the backplate 110 where the base 120 is disposed, and the position of the antenna device 200 is not particularly limited in the embodiments of the present application.

Referring to fig. 22, the antenna device 200 is exemplarily disposed at the bottom edge of the backplate 110, and the antenna device 200 may be disposed at any position between the left side edge of the backplate 110 and the first base 121, that is, the distance m3 between the antenna device 200 and the left side edge of the backplate 110 may be any value.

The distance between the antenna device 200 and the left side of the back plate 110 is the distance between the left side and the side of the antenna device 200 facing the left side.

Fig. 23 is a diagram of the antenna radiation effect of the antenna device of fig. 22 in different positions. Referring to fig. 23, the radiation performance of the antenna device 200 was examined by taking m3 as examples of 12mm, 32mm, and 52mm, and it can be seen that the curves q2 in fig. 23 represent a summary of the three S11 parameter curves of the antenna device 200 when m3 is 12mm, 32mm, and 52mm, and that the three S11 parameter curves substantially overlap. In addition, it is found through simulation experiments 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 disposed at any position between the left side of the back plate 110 and the first base 121, the antenna S11 parameter, directivity factor and forward gain are stable and do not change with the position change.

Fig. 24 is a schematic view of the antenna device of fig. 1 positioned between two bases. Referring to fig. 24, the antenna device 200 may be disposed at any position between the first chassis 121 and the second chassis 122, that is, when the antenna device 200 is disposed between the first chassis 121 and the second chassis 122, the distance m4 between the antenna device 200 and the first chassis 121 may have any value.

The distance between the antenna device 200 and the first base 121 is the distance between the side of the antenna device 200 facing the first base 121 and the first base 121.

The radiation performance of the antenna device 200 was studied with m4 being 0mm, 5mm, 25mm, 45mm, 65mm, 85mm, 105mm, 125mm, 145mm, 185mm, 225mm, 265mm, 305mm, 345mm, 385mm, 425mm, 465mm, 505mm, 545mm, 585mm, and 625mm as an example. It is known from simulation experiments that when m4 is 0mm, 5mm, 25mm, 45mm, 65mm, 85mm, 105mm, 125mm, 145mm, 185mm, 225mm, 265mm, 305mm, 345mm, 385mm, 425mm, 465mm, 505mm, 545mm, 585mm and 625mm, the directivity coefficients of the antenna device 200 are 5.97dBi, 4.47dBi, 4.96dBi, 5.05dBi, 5.2dBi, 5.02dBi, 4.89dBi, 4.65dBi, 4.45dBi, 4.47dBi, 4.57dBi, 4.54dBi, 4.46dBi, 4.53dBi, 4.52dBi, 4.51dBi, 4.49dBi, 4.82dBi, 4.93 i and 4.92 i, and the forward gain is 1dB, 1.9dB, 6dB, 1.1.52 dBi, 4.51dBi, 1.51 dB, 1.1.49 dBi, 1.82 dB, 1.13 dB, 1.4.92 dB, 1dB, 1.12 dB, 1dB, 1.12 dB, 1.1 dB, 1dB, 1.12 dB, 1dB, 1.1 dB, 1dB, and 1dB, respectively.

It can be seen that when the antenna device 200 is disposed at any position between the first base 121 and the second base 122, the antenna directivity and the forward gain are relatively stable and do not change with the position change. Therefore, in the antenna design, the antenna device 200 can be laid out at a proper position selected from the back of the television according to the actual situation of the project.

In the embodiment of the present application, by providing the antenna device 200 on the back plate 110 of the electronic device body 100, the electromagnetic wave at the radiation position of the antenna device 200 is 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 sidewall 221 of the antenna device 200, the electromagnetic wave radiated to other areas is effectively reduced, so that the forward gains of the 2.4 wifi frequency band and other frequency bands of the antenna device 200 are improved, and the directivity coefficients of the 2.4 wifi frequency band and other frequency bands of the antenna device 200 are reduced.

In addition, by configuring the antenna apparatus 200 as a cavity structure with an opening 224 on a sidewall, a plurality of resonance points can be excited in the feeding process, so that the bandwidth of the antenna apparatus 200 is widened, the antenna apparatus can cover more frequency bands, the antenna performance of the antenna apparatus 200 is improved, and the display performance and the functional requirements of the electronic device 10 are further optimized.

Referring to fig. 1, in practical applications, the back plate 110 of the electronic device 10 may be a metal back plate, and the metal back plate may be configured as a metal floor 210 of the antenna device 200. For example, when the electronic device 10 is a television, the back plate 110 of the television can be used as the metal floor 210 of the antenna apparatus 200. When the antenna device 200 is mounted on the back of the tv, 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, so that the structure of the antenna device 200 and the electronic device 10, such as the tv, is simplified, the manufacturing cost of the electronic device 10 is reduced, the mounting efficiency of the electronic device 10 is improved, and the weight of the electronic device 10 is reduced.

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

Because of the structural particularity 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 in a side wall, that is, other areas except the opening 224 are closed structures, electromagnetic waves of the antenna device 200 are mainly radiated to the front of the screen through the opening 224 of the side wall, and the distribution of signal currents of the antenna device 200 is concentrated, so that the antenna performance of the antenna device 200 is not deteriorated due to the arrangement of the metal frame.

Fig. 25 is a schematic structural diagram of a second electronic device according to an embodiment of the present application. Referring to fig. 25, the number of the antenna devices 200 of the embodiment of the present application is at least two, and at least two antenna devices 200 are respectively disposed on two adjacent sides of the back plate 110.

First, taking two antenna devices 200 as an example, as shown in fig. 25, one antenna device 200 is provided on each of the bottom and left sides of the back plate 110. The horizontal distance m5 between the two antenna devices 200 is at least 18mm, and the vertical distance m6 between the two antenna devices 200 is at least 27mm, so as to further improve the isolation between the two antenna devices 200 and ensure that the two antenna devices do not generate signal interference.

It should be noted that the numerical values and numerical ranges related to the embodiments of the present application are approximate values, and there may be a certain range of errors depending on the manufacturing process, and the error may be considered as negligible by those skilled in the art.

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

Taking m5 of 18mm and m6 of 27mm as an example, experimental studies on the radiation performance of two antenna devices 200 in the electronic apparatus 10 of fig. 25 were performed. Referring to fig. 25, for convenience of description, the antenna device 200 located at the bottom of the back plate 110 is referred to as a first antenna device 201, and the antenna device 200 located at the left side of the back plate 110 is referred to as a second antenna device 202.

Fig. 26 is a diagram of the antenna radiation effect of the two antenna devices of fig. 25. Referring to fig. 26, q3 is a general term of the S11 parametric curves of the two antenna devices 200, and it can be seen that the S11 parametric curves of the two antenna devices 200 substantially coincide. Further, the curve u1 shows the isolation between the two antenna devices 200, and it can be seen that the isolation between the two antenna devices is 27dB or more, which is good.

Fig. 27 is a simulated far-field pattern of the first antenna assembly of fig. 25, and fig. 28 is a simulated far-field pattern of the second antenna assembly of fig. 25. As shown in fig. 27 and fig. 28, it can be known from simulation experiments that the maximum direction of the first antenna device 201 and the second antenna device 202 during radiation is on a horizontal plane (e.g., x-y plane in fig. 27 and fig. 28), and far field patterns of the two devices are complementary to each other, which can be used as a wifi MIMO layout. In addition, simulation experiments show that the directivity coefficient of the first antenna device 201 is 4.7dBi, the directivity coefficient of the second antenna device 202 is 5.4dBi, and the directivity coefficient is better than that of the conventional antenna device.

In the embodiment of the present application, at least one antenna device 200 is respectively disposed on two adjacent sides of the back plate 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 simultaneously widening 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, each antenna device 200 is a cavity structure having an opening 224 on one side, so that the isolation between the antenna devices 200 is improved, and signal interference between the antenna devices 200 is avoided. Meanwhile, the far-field patterns of the two antenna devices 200 located on the two adjacent sides are complementary, thus ensuring continuity of the coverage band of the formed wifi MIMO antenna.

The above example is that one antenna device 200 is respectively disposed on two adjacent sides of the back plate 110.

In some examples, at least two antenna devices 200 may be disposed on at least one of the two adjacent sides of the back plate 110 at intervals. Fig. 29 is a third schematic structural diagram of an electronic device according to an embodiment of the present application. Referring to fig. 29, for example, in addition to fig. 25, one antenna device is further provided at an interval on one side of the first antenna device on the bottom side of the back plate 110. For convenience of description, the antenna device 200 on the first antenna device 201 side is taken as the third antenna device 203.

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

Fig. 30 is a diagram of the antenna radiation effect of the three antenna arrangement of fig. 29. Referring to fig. 30, q4 is a general term of the S11 parametric curves of the three antenna devices 200, and it can be seen that the S11 parametric curves of the three antenna devices 200 substantially overlap. In addition, the curve u2 is an isolation curve of the first antenna device 201 and the second antenna device 202, and it can be seen that the isolation of the first antenna device 201 and the second antenna device 202 is 28dB or more, and the isolation is good; the curve u3 is the isolation curve of the first antenna device 201 and the third antenna device 203, and the curve u4 is the isolation curve of the second antenna device 202 and the third antenna device 203, and it can be seen that the isolation of the first antenna device 201 and the third antenna device 203 and the isolation of the second antenna device 202 and the third antenna device 203 are both 39dB or more.

In practical applications, the three-antenna system may be implemented as a 2 × wifi + BT mode, for example, the first antenna device 201 and the second antenna device 202 with complementary far-field patterns may be implemented as wifi antennas to optimize signal transmission performance with a router, and the third antenna device 203 may be implemented as a bluetooth antenna to optimize signal transmission performance with a remote controller.

In addition, due to the structural characteristics of the antenna devices 200, the isolation between two adjacent antenna devices 200 is ensured, and the antenna devices 200 are ensured not to interfere with each other.

In the embodiment of the present application, the plurality of antenna devices 200 are arranged on one of the side edges of the back plate 110 at intervals, so that the space of the back plate 110 of the electronic device 10 is reasonably utilized, the radiation intensity of the antenna device 200 on the electronic device 10 is further enhanced, and 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 explicitly stated or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, a fixed connection, an indirect connection via an intermediary, a connection between two elements, or an interaction between two elements. The specific meanings of the above terms in the embodiments of the present application can be understood by those of ordinary skill in the art according to specific situations.

The terms "first," "second," "third," "fourth," and the like in the description and in the claims of the embodiments of the application and in the drawings described above, if any, are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order.

Claims

1. An antenna device is used for being fixed on a back plate of electronic equipment and is characterized by comprising a metal floor, a main radiation arm and a feed structure;

the metal floor is used for being fixed with electronic equipment's backplate, main radiation arm includes annular lateral wall and roof, the roof with metal floor sets up relatively, the one end of annular lateral wall with the roof is connected, the other end of annular lateral wall with metal floor connects, the last opening that has of annular lateral wall, the opening orientation electronic equipment's backplate edge, feed structure is located main radiation arm with metal floor encloses synthetic radiation cavity, feed structure is used for to main radiation arm feed-in signal current.

2. The antenna device according to claim 1, wherein the feeding structure comprises a first portion, a second portion and a third portion connected in sequence, the second portion is disposed opposite to the metal floor, and ends of the first portion and the third portion, which are far away from the second portion, extend in a direction toward the metal floor;

the metal floor is provided with 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.

3. The antenna assembly of claim 2 wherein there is a first gap between the second portion and the top wall.

4. The antenna device according to any of claims 1-3, characterized in that the antenna device further comprises a secondary radiating arm, which is arranged within the radiating cavity.

5. The antenna device according to claim 4, wherein the end of the secondary radiating arm facing the metal floor extends onto the metal floor, a second gap is provided between the end of the secondary radiating arm facing the top wall and the top wall, and the secondary radiating arm, the second gap and the top wall form a filter structure;

or a third gap is formed between one end, facing the metal floor, of the auxiliary radiation arm and the metal floor, one end, facing the top wall, of the auxiliary radiation arm extends onto the top wall, and the auxiliary radiation arm, the third gap and the metal floor form a filtering structure together.

6. The antenna device according to any of claims 1-5, wherein the annular sidewall comprises a first sidewall, a second sidewall and a third sidewall 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, a gap between one ends, far away from the second side wall, of the first side wall and the third side wall forms the opening, and the first side wall, the second side wall and the third side wall are all configured into a plane structure.

7. The antenna device according to claim 6, wherein the feed structure is located between a secondary radiating arm of the antenna device and a third side wall of the annular side wall, the distance between the secondary radiating arm and the third side wall being 1/3-1/2 of the distance between the first side wall and the third side wall of the annular side wall, the distance between the feed structure and the third side wall being less than 1/3 of the distance between the first side wall and the third side wall;

or the feeding structure is located between the secondary radiation arm and the first side wall, the distance between the secondary radiation arm and the first side wall is 1/3-1/2 of the distance between the first side wall and the third side wall, and the distance between the feeding structure and the first side wall is smaller than 1/3 of the distance between the first side wall and the third side wall.

8. The antenna device according to claim 6, characterized in that the feed structure is located between a secondary radiating arm of the antenna device and a third side wall of the loop-shaped side wall, the distance between the secondary radiating arm and the third side wall being 1/3-1/2 of the distance between the first side wall and the third side wall of the loop-shaped side wall, the distance between the feed structure and the third side wall being 1/3-1/2 of the distance between the first side wall and the third side wall;

or the feeding structure is positioned between the auxiliary radiating arm and the first side wall, the distance between the auxiliary radiating arm and the first side wall is 1/3-1/2 of the distance between the first side wall and the third side wall, and the distance between the feeding structure and the first side wall is 1/3-1/2 of the distance between the first side wall and the third side wall.

9. The antenna device as claimed in any one of claims 4 to 8, wherein the side wall of the secondary radiating arm of the antenna device has an external thread, the top wall or the metal floor has an internal thread, and the secondary radiating arm is screwed with the top wall or the metal floor.

10. An electronic device, characterized in that it comprises an electronic device body and at least one antenna device according to any of claims 1-9;

the antenna device is fixed on the back plate of the electronic equipment body, and the opening of the antenna device faces any side edge of the back plate.

11. The electronic device of claim 10, wherein the backplane is a metal backplane configured as a metal floor for the antenna arrangement.

12. 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 back plate.

13. The electronic device of claim 12, wherein a horizontal distance between the at least two antenna devices is at least 18mm, and a vertical distance between the at least two antenna devices is at least 27 mm.

14. The electronic device according to claim 12 or 13, wherein at least two antenna devices are spaced apart from at least one of the two adjacent sides.