WO2021227681A1

WO2021227681A1 - Electronic device

Info

Publication number: WO2021227681A1
Application number: PCT/CN2021/083575
Authority: WO
Inventors: 李蕴力; 洪伟; 吴凡; 蒋之浩; 余超; 徐鑫; 李挺钊; 缑城
Original assignee: 南京锐码毫米波太赫兹技术研究院有限公司; 华为技术有限公司
Priority date: 2020-05-11
Filing date: 2021-03-29
Publication date: 2021-11-18
Also published as: CN113644408B; CN113644408A

Abstract

Provided is an electronic device. The electronic device comprises a base antenna, a dielectric body and a shell, wherein the dielectric body is arranged on the base antenna; the shell comprises a resonance area; a material, which is located in the resonance area, of the shell is a dielectric material; the surface of the dielectric body which faces away from the base antenna is connected to the shell located in the resonance area; and the dielectric body and the shell located in the resonance area together form a resonance body. The resonance body can be excited by the base antenna in a working state, such that the resonance body participates in radiation, thereby expanding the bandwidth of the base antenna. It can be understood that the base antenna forms a millimeter wave antenna by resonating with the resonance body. The electronic device provided in the present application is used to eliminate the negative influence of a glass back cover on the performance of an antenna.

Description

Electronic equipment

This application claims the priority of a Chinese patent application filed with the Chinese Patent Office, the application number is 202010393480.8, and the application name is "Electronic Equipment" on May 11, 2020, the entire content of which is incorporated into this application by reference.

Technical field

This application relates to the field of communication technology, and in particular to an electronic device.

Background technique

Millimeter wave technology is one of the core technologies of 5G, however, higher frequency means greater transmission loss. Therefore, the 5G millimeter wave frequency band requires a high-performance antenna array to meet the demand. The current millimeter wave solution for terminals is to install several millimeter wave modules inside the mobile phone to achieve as large a coverage as possible. Most mobile phone back covers in the market are made of glass. The existence of glass back covers will have a negative impact on antenna performance. How to eliminate the negative impact of glass back covers on antenna performance is also a problem worthy of study.

Summary of the invention

This application provides an electronic device to eliminate the negative influence of the glass back cover on the antenna performance.

The electronic device described in the present application includes a basic antenna, a dielectric body, and a housing. The dielectric body is provided on the basic antenna. The housing includes a resonance region. The material of the housing in the resonance region is a dielectric material. , The surface of the dielectric body facing away from the basic antenna is connected to the housing located in the resonance area, and the dielectric body and the housing located in the resonance area jointly form a resonant body, and the basic antenna The resonant body can be excited in the working state, so that the resonant body participates in radiation, and the bandwidth of the basic antenna is expanded. It can be understood that the basic antenna meets the millimeter wave antenna frequency band by resonating with the resonator.

The electronic device of the present application forms the resonator body by combining the dielectric body and the housing located in the resonance region, that is, the basic antenna and the resonator body form an antenna unit. The basic antenna is radiated and the resonator is excited to participate in the radiation, thereby introducing a resonance frequency point to expand the bandwidth of the basic antenna, and further expand the bandwidth of the antenna unit. It is understandable that when the basic antenna of the antenna unit radiates, a resonant frequency point is generated in the required frequency band (24GHz～36GHz) under the influence of the resonator, and at the same time, the resonator participates in the radiation when the basic antenna radiates. Introduce another resonance frequency point. In other words, the antenna unit can generate two resonant frequency points in the required frequency band through the basic antenna and the resonator body, effectively expanding the bandwidth of the antenna unit. The housing of the electronic device of the present application is the housing of the electronic device, and the housing of the electronic device is used as a part of the resonator to participate in the radiation of the basic antenna to form an antenna unit. In order to reduce the negative impact of the housing on the antenna unit, a new resonance frequency point is also introduced to expand the bandwidth of the antenna unit to meet the performance requirements of the antenna unit.

In one embodiment, the material of the medium body is one of ceramic, plastic or glass materials.

In one embodiment, the housing includes a first cover plate and a second cover plate that are disposed oppositely, and the first bent portion of the first cover plate and the second bent portion of the second cover plate butt , The first bending portion and the second bending portion are provided on a side of the dielectric body facing away from the basic antenna, and the first bending portion and the second bending portion are connected to the The connected part of the dielectric body constitutes the resonance region. In this embodiment, the first cover may be, for example, the front cover of the electronic device, such as a display panel, etc., and the second cover may be, for example, the back cover of the electronic device, and its material may be, for example, Medium materials such as glass. By designing the first cover plate and the second cover plate that affect the performance of the antenna as a part of the resonator, it is avoided that the first cover plate and the second cover plate affect the basic antenna. As a negative impact, a new resonance frequency point is also introduced, which expands the bandwidth of the basic antenna to meet the performance requirements of the basic antenna. Of course, in other embodiments, the cover plate can also be only the front cover plate or only the rear cover plate, that is, only the front cover plate is a part of the resonator body, so as to avoid the front cover plate from affecting the foundation. The negative influence of the antenna also introduces a new resonance frequency point, which expands the bandwidth of the basic antenna. Alternatively, only the back cover is a part of the resonant body, thereby avoiding the negative influence of the back cover on the basic antenna, and introducing new resonance frequency points to expand the bandwidth of the basic antenna.

In one embodiment, the first cover plate includes a first straight portion, the second cover plate includes a second straight portion, and opposite sides of the first straight portion are respectively connected to the first straight portion. The second bent portion is connected to opposite sides of the second straight portion, and the first straight portion and the second straight portion are spaced apart so that the first straight portion The cover plate and the second cover plate form an accommodating space, and the dielectric body and the basic antenna are located in the accommodating space. That is, the first cover plate and the second cover plate jointly form the housing of the electronic device, and the housing (the first cover plate and the second cover plate) of the electronic device is designed Become a part of the resonant body, on the basis of avoiding the negative influence of the first cover and the second cover on the basic antenna, it also introduces new resonance frequency points, which expands the basic antenna bandwidth.

In an embodiment, the first bending portion is in contact with the second bending portion. In other words, the first bending portion and the second bending portion resist. Of course, in other embodiments, the first bending portion and the second bending portion are also connected by glue.

In one embodiment, a gap is formed between the first bending portion and the second bending portion. In other words, the first bending portion and the second bending portion are spaced apart.

In one embodiment, the medium body includes a main body and a convex block, the convex block is provided on the connecting surface of the main body and is located in the gap, and the first bending part and the second bending part The parts are respectively located on both sides of the convex block. That is to say, the medium body is provided with bumps so that the medium body partially extends into the gap between the first bending portion and the second bending portion to fill the gap, thereby The first bending part and the second bending part and the dielectric body form a complete resonator body, and there is no need to fill other materials between the first bending part and the second bending part Affect the signal transmission effect of the basic antenna. Of course, in other embodiments, the dielectric body does not have bumps, and the gap can be filled with a dielectric material of the same dielectric constant of the dielectric body.

In one embodiment, the connecting surface of the main body includes a first arc surface and a second arc surface, the protrusion is located between the first arc surface and the second arc surface, and the first curved surface The portion is attached to the first arc surface, and the second bent portion is attached to the second arc surface. In other words, the connecting surface of the main body is adapted to the shape of the first bending portion and the second bending portion, so that the first bending portion and the second bending portion and the main body A good fit is achieved between them to ensure the resonance effect of the resonator body.

In one embodiment, the surface of the bump facing away from the connecting surface is coplanar with the surface of the first bending portion and the second bending portion facing away from the connecting surface, so as to ensure that the first A bending part, the second bending part and the convex block together form a smoothly transitioned curved surface, which ensures a clean and beautiful appearance of the electronic device.

In one embodiment, the basic antenna includes a dielectric plate and a conductive sheet, the conductive sheet is sandwiched between the dielectric plate and the dielectric body, and the dielectric plate includes a first surface and a second surface opposite to each other. The first surface is used for power feeding, the conductive sheet is located on the second surface, and the conductive sheet is provided with a gap penetrating the conductive sheet. That is, the basic antenna in this embodiment is a slot antenna. Of course, in other embodiments, the basic antenna may also be a patch antenna or other types of antennas.

In one embodiment, the gap is cross-shaped.

In one embodiment, the basic antenna includes a feeder line, the feeder line is cross-shaped, and is arranged on the first surface and is arranged directly opposite to the slot. It is understandable that the basic antenna can realize dual polarization radiation. In an implementation manner, the number of the basic antenna and the medium body are both multiple, and the basic antenna and the medium are arranged in one-to-one correspondence and arranged in a row to form an antenna array, thereby effectively increasing the gain.

In one embodiment, a filling material is provided between the adjacent basic antenna and the adjacent dielectric body. In this embodiment, the filling material is a material with a low dielectric constant to isolate the adjacent dielectric body from the adjacent basic antenna.

In one embodiment, the housing and the medium body are bonded by glue.

In an embodiment, the number of the antenna arrays is multiple, and the multiple antenna arrays are arranged on opposite sides of the electronic device, or arranged on either side of the electronic device at intervals. In other words, multiple antenna arrays can be provided on the electronic device as required to meet the application requirements of the electronic device.

In one embodiment, the housing further includes a middle frame, the first cover plate and the second cover plate are installed on opposite sides of the middle frame, the middle frame includes an escape area, and the medium The body and the basic antenna are located in the avoidance area, and the avoidance area is a part of the resonance area. A space for accommodating the dielectric body and the basic antenna is formed by removing a part of the middle frame, so that the dielectric body is connected to the housing to form the resonant body. That is, the dielectric body and the basic antenna in this application are located in the avoidance area to prevent the middle frame from affecting the performance of the basic antenna, and does not occupy other space of the electronic device, which is convenient for the dielectric body and the basic antenna. When the antenna is connected to the housing, it is beneficial to the miniaturization of the electronic device and improves the user experience.

In one embodiment, the electronic device includes a circuit board, the feeder is electrically connected to the circuit board, and the basic antenna is controlled to send or receive signals through the circuit board.

Description of the drawings

In order to more clearly describe the technical solutions in the embodiments of the present application or the background art, the following will describe the drawings that need to be used in the embodiments of the present application or the background art.

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

2 is a schematic cross-sectional structure diagram of the electronic device provided in FIG. 1;

FIG. 3 is a schematic diagram of part of the structure of the electronic device provided in FIG. 2;

FIG. 4 is a partial exploded schematic diagram of the electronic device provided in FIG. 3;

FIG. 5 is a schematic diagram of the structure of the medium body provided in FIG. 4;

Figure 6 is a simulated scattering parameter diagram of the antenna unit under different conditions;

Fig. 7 is a schematic diagram of the low-frequency electric field distribution of the first port of the antenna unit;

Fig. 8 is a schematic diagram of the high-frequency electric field distribution of the first port of the antenna unit;

9 is a diagram showing the relationship between the dielectric constant of the resonator in the antenna unit and the scattering parameter of the first port;

10 is a diagram showing the relationship between the height of the dielectric body in the antenna unit and the scattering parameter of the first port;

11 is a diagram showing the relationship between the length of the slot in the antenna unit and the scattering parameter of the first port;

Fig. 12 is a schematic diagram of low-frequency electric field distribution at the second port of the antenna unit;

FIG. 13 is a schematic diagram of the high-frequency electric field distribution of the second port of the antenna unit;

14 is a diagram showing the relationship between the dielectric constant of the resonator in the antenna unit and the scattering parameter of the first port;

15 is a diagram showing the relationship between the height of the dielectric body in the antenna unit and the scattering parameter of the first port;

16 is a diagram of the relationship between the length of the slot in the antenna unit and the scattering parameter of the first port;

Fig. 17 is a directional pattern and gain of two frequency points of the first port of the antenna unit;

Fig. 18 is the directional pattern and gain of the two frequency points of the second port of the antenna unit;

Figure 19 is the scattering parameters of the antenna array;

20 is a schematic diagram of isolation of the antenna array;

FIG. 21 is a scanning diagram of the first port of the antenna array;

Fig. 22 is a scanning diagram of the second port of the antenna array;

FIG. 23 is a schematic structural diagram of another embodiment of the electronic device provided in FIG. 2;

FIG. 24 is a schematic structural diagram of another embodiment of the electronic device provided in FIG. 23;

FIG. 25 is a schematic structural diagram of another embodiment of the electronic device provided in FIG. 23.

Detailed ways

The embodiments of the present application will be described below in conjunction with the drawings in the embodiments of the present application.

At present, the 5G signal transmission of the electronic device is realized by arranging several millimeter wave antenna modules in the electronic device. However, the housing of the electronic device, such as the display panel, the back cover, the middle frame, etc., will affect the transmission performance of the millimeter wave antenna, thereby affecting the transmission capability of the electronic device, and cannot meet the needs of users.

In view of this, the present application provides an electronic device to solve the problem that the display panel, the back cover, the middle frame, etc. affect the transmission performance of the millimeter wave antenna.

Please refer to FIG. 1. FIG. 1 is a schematic structural diagram of an electronic device according to an embodiment of the present application. The electronic device 100 includes, but is not limited to, electronic devices with antennas such as mobile phones, tablet computers, multimedia players, e-book readers, notebook computers, in-vehicle devices, or wearable devices. In this application, the electronic device 100 is a mobile phone as an example for specific description.

Please refer to FIG. 2, which is a schematic cross-sectional structure diagram of the electronic device 100 provided in FIG. 1. The electronic device 100 includes a housing 10, a basic antenna 20, and a dielectric body 30. The housing 10 includes a cover 11 and a middle frame 12. The cover 11 is mounted on the middle frame 12 to form a housing space 13 with the middle frame 12. Components such as 30 and the basic antenna 20 are contained in the containing space 13. The housing 10 includes a resonance area 14. The material of the housing 10 in the resonance area 14 is a dielectric material. The dielectric body 30 is provided on the base antenna 20. In connection, the dielectric body 30 and the housing 10 located in the resonance region 14 jointly form a resonant body, and the basic antenna 20 can excite the resonant body in the working state, so that the resonant body participates in radiation and expands the bandwidth of the basic antenna 20. It can be understood that the base antenna 20 meets the millimeter wave antenna frequency band by resonating with the resonator.

The electronic device 100 of the present application forms a resonant body by combining the dielectric body 30 and the housing 10 located in the resonance region 14, that is, the basic antenna 20 and the resonant body form an antenna unit. The basic antenna 20 radiates and excites the resonant body to participate in the radiation, thereby introducing a resonance frequency point to expand the bandwidth of the basic antenna 20 and further expand the bandwidth of the antenna unit. It is understandable that when the basic antenna 20 of the antenna unit radiates, a resonant frequency point is generated in the required frequency band (24GHz～36GHz) under the influence of the resonator. At the same time, the resonator participates in the radiation when the basic antenna 20 radiates and introduces another resonance. Frequency. In other words, the antenna unit can generate two resonant frequency points in the required frequency band through the basic antenna 20 and the resonator, effectively expanding the bandwidth of the antenna unit. The housing 10 of the electronic device 100 of the present application is the housing 10 of the electronic device 100. The housing 10 of the electronic device 100 is used as a part of the resonant body to participate in the radiation of the basic antenna 20 to form an antenna unit, which avoids the pairing of the housing 10 The negative impact of the antenna unit also introduces a new resonance frequency point, which expands the bandwidth of the antenna unit to meet the performance requirements of the antenna unit.

The cover plate 11 includes a first cover plate 111 and a second cover plate 112 that are arranged oppositely. The first cover plate 111 and the second cover plate 112 are respectively installed on opposite sides of the middle frame 12, that is, the middle frame 12 is connected to Between the first cover 111 and the second cover 112. The first cover 111, the middle frame 12, and the second cover 112 jointly enclose the accommodating space 13. In this embodiment, the first cover 111 is the front cover of the electronic device 100, and the front cover is the display panel. The second cover 112 is a rear cover of the electronic device 100, and the rear cover is a rear shell. When a user uses the electronic device 100, the display panel is usually placed toward the user, and the rear cover is placed away from the user. Of course, in other embodiments, the first cover 111 and the second cover 112 are both display panels. The first cover plate 111 and the second cover plate 112 may also be an integral structure formed integrally.

The first cover 111 includes a first straight portion 1111 and a first bent portion 1112, and the first bent portion 1112 is connected to opposite sides of the first straight portion 1111 respectively. The second cover 112 includes a second straight portion 1121 and a second bent portion 1122. Opposite sides of the second straight portion 1121 are respectively connected to the second bent portion 1122, the first straight portion 1111 and the second straight portion 1122. The straight portions 1121 are arranged at intervals, the first bending portion 1112 and the corresponding second bending portion 1122 are butted, and are respectively installed on opposite sides of the middle frame 12, the first cover 111, the middle frame 12 and the second cover 112 collectively form the housing 10 of the electronic device 100. The first bending portion 1112 and the second bending portion 1122 are located on the side of the electronic device 100, and the first bending portion 1112 and the corresponding second bending portion 1122 are connected to the middle frame 12 to form the side of the electronic device 100 wall. In this embodiment, the two first bending portions 1112 are bending portions on both sides of the display panel, that is, the display panel is a 3D display panel. The second straight portion 1121 and the second bent portion 1122 are an integral structure formed integrally. Of course, in other embodiments, the second straight portion 1121 and the second bent portion 1122 may be connected by a connecting process.

The middle frame 12 includes an avoiding area 121. Specifically, the avoiding area 121 is close to the first bending portion 1112 and the second bending portion 1122, the dielectric body 30 and the basic antenna 20 are located in the avoiding area 121, and the avoiding area 121 is the Part of the resonance region 14, the first bending portion 1112 and the second bending portion 1122 are provided on the side of the dielectric body 30 facing away from the base antenna 20, that is, the first bending portion 1112 and the second bending portion 1122 and the dielectric body The part connected by 30 and the part of the avoidance area 121 constitute the resonance area 14. In other words, the surface of the dielectric body 30 facing away from the base antenna 20 is connected to the resonance region 14 of the first bending portion 1112 and the second bending portion 1122. It is understandable that only the part where the first bending portion 1112 and the second bending portion 1122 are connected to the dielectric body 30 will participate in the radiation. Therefore, the first bending portion 1112 and the second bending portion 1122 are connected to the dielectric body 30. The area is the resonance area 14. In this embodiment, the first bending portion 1112 is made of glass, and the second bending portion 1122 is made of glass. The dielectric constant of the first bending portion 1112 and the second bending portion 1122 is, for example, 5.5, and the thickness is 0.5 mm. . It can be understood that the resonance region 14 and the regions other than the resonance region 14 of the first bending portion 1112 and the second bending portion 1122 are made of dielectric materials. In this embodiment, the first cover plate 111 and the second cover plate 112, which affect the performance of the antenna, are designed as part of the resonator to form the antenna unit, which prevents the first cover plate 111 and the second cover plate 112 from affecting the antenna unit. As a negative impact, a new resonance frequency point is also introduced, which expands the bandwidth of the antenna unit to meet the performance requirements of the antenna unit. At the same time, a space for accommodating the dielectric body 30 and the base antenna 20 is formed by removing a part of the middle frame 12, so that the dielectric body 30 is connected with the first cover plate 111 and the second cover plate 112 to form a resonant body. That is, the dielectric body 30 and the basic antenna 20 in the present application are arranged in the avoidance area 121 to prevent the middle frame 12 from affecting the performance of the basic antenna 20, and does not occupy other space of the electronic device 100, which facilitates the interaction between the dielectric body 30 and the basic antenna 20 When the first cover 111 and the second cover 112 are connected, it is conducive to the miniaturization of the electronic device 100 and improves the user experience. Of course, in other embodiments, the dielectric constant and thickness of the first bending portion 1112 and the second bending portion 1122 may also be other values. The resonant region 14 of the second bending portion 1122 is made of a dielectric material, and the parts other than the resonant region 14 may be made of a non-dielectric material. Alternatively, the second bending portion 1122 may also be made of other media materials such as plastic or ceramic.

In other embodiments, the housing 10 can also be only the front cover plate or only the rear cover plate, that is, only the front cover plate is a part of the resonator to form the antenna unit, thereby avoiding the impact of the front cover plate on the antenna unit. As a negative impact, a new resonance frequency point is also introduced, which expands the bandwidth of the basic antenna 20. Or, only the back cover is a part of the resonator, thereby avoiding the negative influence of the back cover on the antenna unit, and introducing new resonance frequency points to expand the bandwidth of the antenna unit.

In this embodiment, a gap a is formed between the first bending portion 1112 and the second bending portion 1122, that is, the side of the first bending portion 1112 facing away from the first straight portion 1111 and the back of the second bending portion 1122 A gap a is formed between one side of the second straight portion 1121. It can be understood that the gap a is formed by removing part of the middle frame 12, that is, when the part of the middle frame 12 is not removed to form the avoidance area 121, the first bending portion 1112 and the second bending portion 1122 are respectively connected to the middle frame On opposite sides of 12, after removing part of the middle frame 12, a gap a is formed between the portions of the first bending portion 1112 and the second bending portion 1122, in other words, the first bending portion 1112 and the second bending portion 1122 The positions corresponding to the avoidance area 121 are arranged at intervals. Of course, in other embodiments, the first bending portion 1112 and the second bending portion 1122 are in contact, that is, the first bending portion 1112 faces away from the first straight portion 1111 and the second bending portion 1122 faces away from the side. The second straight portion 1121 is in contact with one side. In other words, the first bending portion 1112 and the second bending portion 1122 resist. Alternatively, the first bending portion 1112 and the second bending portion 1122 are also connected by glue.

Please refer to FIG. 3 and FIG. 4. FIG. 3 is a partial structural diagram of the electronic device provided in FIG. 2. Fig. 4 is a partial exploded schematic diagram of the electronic device provided in Fig. 3. The basic antenna 20 includes a feed line 21, a dielectric plate 22, and a conductive sheet 23. The conductive sheet 23 is sandwiched between the dielectric plate 22 and the dielectric body 30. The dielectric plate 22 includes a first surface 221 and a second surface opposite to each other. On the surface 222, the feed line 21 is provided on the first surface 221 for feeding power, the conductive sheet 23 is located on the second surface 222, and the conductive sheet 23 is provided with a gap 231 penetrating the conductive sheet 23. That is, the basic antenna 20 in this embodiment is a slot antenna. Of course, in other embodiments, the base antenna 20 may also be a patch antenna or other types of antennas, and the dielectric body 30 may be configured in different forms according to the base antenna 20 to form a resonant body with the housing 10 to resonate The body participates in radiation when the basic antenna 20 radiates to form an antenna unit, and another resonant frequency point is introduced, so that the antenna unit can generate two resonant frequency points when the resonator body participates in radiation, thereby expanding the bandwidth of the antenna unit.

Specifically, the dielectric plate 22 has a square shape, the slit 231 has a cross shape, the feed line 21 has a cross shape, and the slit 231 and the feed line 21 are arranged directly opposite. In this embodiment, the dielectric constant of the dielectric plate 22 is 9.2, and the length and width are both 3 mm. The length L1 of the slit 231 is 2.7 mm, and the width L2 is 0.5 mm. The length L3 of the feeder line 21 is 3 mm, and the width L4 is 0.5 mm. The feeder line 21 has two pairs of differential ports, a first port 1-1' and a second port 2-2'. The feeder line 21 couples and feeds the conductive sheet 23 through the two pairs of differential ports, that is, by applying current to the feeder line 21 to make The current induces the magnetic field around the feeder, and the electric field induced by the magnetic field excites the slot antenna to generate an electric field, and then the resonant body is excited by the electric field generated by the slot antenna. It is understandable that the basic antenna 20 can realize dual-polarized radiation through differential feeding, and the basic antenna 20 radiates toward the outside of the side of the electronic device 100 and has end-fire radiation characteristics. Of course, in other embodiments, the slit 231 can also have other shapes, the feeder 21 can also have other shapes, and the dimensions of the slit 231, the feeder 21, and the dielectric plate 22 can also be set according to actual needs.

Please refer to FIG. 4 and FIG. 5. FIG. 5 is a schematic diagram of the structure of the medium body provided in FIG. 4. The medium body 30 includes a main body 31 and a bump 32. The bump 32 is provided on the connecting surface 311 of the main body 31 and is located in the gap a. The first bending portion 1112 and the second bending portion 1122 are respectively located on both sides of the bump 32 . In other words, the area where the bump 32 is located in the gap a is also a part of the resonance area 14, that is, the escape area 121 of the partial middle frame 12 is also a part of the resonance area 14. In this embodiment, the length and width L5 of the main body 31 are both 3 mm, so as to be compatible with the base antenna 20, and the height h of the main body 31 is 1 mm. The length of the bump 32 is 3 mm, the width L6 is 1 mm, and the thickness T is 0.5 mm to fit the gap a. The material of the dielectric body 30 is one of ceramic, plastic or glass materials, and its dielectric constant is 5.7. The main body 31 has a semi-cylindrical shape, the protrusion 32 is a block shape, and the protrusion 32 and the main body 31 are an integral structure formed integrally to ensure the connection strength of the dielectric body 30. The connecting surface 311 of the main body 31 is a circular arc surface to adapt to the first bending portion 1112 and the second bending portion 1122. The medium body 30 is provided with a bump 32 so that the medium body 30 partially extends into the gap a between the first bending portion 1112 and the second bending portion 1122 to fill the gap a, thereby making the first bending portion 1112 It forms a complete resonator with the second bending portion 1122 and the dielectric body 30. In other words, the dielectric body 30 is integrated with the first bending portion 1112 and the second bending portion 1122, and there is no need for the first bending portion 1112. Filling with other materials between the second bending portion 1122 and the second bending portion 1122 affects the signal transmission effect of the basic antenna 20. Of course, in other embodiments, the bump 32 can also be connected to the main body 31 through a connection process. The size and dielectric constant of the main body 31 and the bumps 32 of the dielectric body 30 can also be set according to actual needs. The dielectric body 30 may also not have the bumps 32, and the gap a may be filled with a dielectric material having the same dielectric constant as the dielectric body 30. The shape of the medium body 30 is not limited to the above description.

The connecting surface 311 of the main body 31 includes a first curved surface 3111 and a second curved surface 3112. The bump 32 is located between the first curved surface 3111 and the second curved surface 3112. The first bent portion 1112 is attached to the first curved surface 3111. Close, the second bending portion 1122 and the second curved surface 3112 are attached to each other. In other words, the connecting surface 311 of the main body 31 is adapted to the shape of the first bending portion 1112 and the second bending portion 1122, so that the first bending portion 1112, the second bending portion 1122 and the main body 31 can achieve a good relationship. The fit to ensure the resonance effect of the resonator body. In this embodiment, the first bending portion 1112 and the second bending portion 1122 are respectively bonded to the first arc surface 3111 and the second arc surface 3112 by glue. The dielectric constant of the glue is the same as or similar to that of the first bending portion 1112 and the dielectric body 30. The surface of the bump 32 facing away from the connecting surface 311 is coplanar with the surface of the first bending portion 1112 and the second bending portion 1122 facing away from the connecting surface 311, thereby ensuring that the first bending portion 1112, the second bending portion 1122 and The bumps 32 together form a smoothly transitioned curved surface to ensure that the appearance of the electronic device 100 is clean and beautiful. Of course, in other embodiments, the first bending portion 1112 and the first arc surface 3111 are not completely attached, and the second bending portion 1122 and the second arc surface 3112 are not completely attached.

2 and 3 again, the number of basic antennas 20 and dielectric bodies 30 is 4, the 4 dielectric bodies 30 and the 4 basic antennas 20 are all located in the avoidance area 121, and the basic antenna 20 and the dielectric body 30 are arranged in one-to-one correspondence. And arranged in a row to form an antenna array composed of four antenna elements, thereby effectively improving the gain of the antenna array. In this embodiment, the distance between adjacent dielectric bodies 30 is 1.5 mm, that is, the length of the antenna array is 18 mm, and the performance of the antenna array is guaranteed without occupying too much space of the electronic device 100. A filling material 40 is provided between the adjacent basic antenna 20 and the adjacent dielectric body 30. In this embodiment, the filling material 40 is a material with a low dielectric constant to isolate the adjacent dielectric body 30 and the adjacent basic antenna 20. At the same time, the filling material 40 can also encapsulate the dielectric body 30 and the basic antenna 20 on the first bending portion 1112 and the second bending portion 1122, and play a role of fixing the dielectric body 30 and the basic antenna 20. Of course, in other embodiments, the number of the base antenna 20 and the dielectric body 30 is one. Alternatively, the number of basic antennas 20 and dielectric bodies 30 can be set according to actual needs to form antenna arrays of different lengths.

In this embodiment, the number of antenna arrays is two, and the two antenna arrays are respectively provided on opposite sides of the electronic device 100. The first bending portion 1112 and the second bending portion 1122 located on both sides of the electronic device 100 are used as a part of the antenna array. Correspondingly, the middle frame 12 is provided with two avoidance areas 121 for accommodating the antenna array. Of course, in other embodiments, the number of antenna arrays is multiple, and multiple antenna arrays may be arranged on any side of the electronic device 100 at intervals. Or set in other positions of the electronic device 100, that is, multiple antenna arrays can be set on the electronic device 100 as needed to meet the application requirements of the electronic device 100.

The electronic device 100 includes a circuit board (not shown), for example, a radio frequency circuit board. The circuit board is housed in the accommodating space 13, the feeder 21 is electrically connected to the circuit board, and the basic antenna 20 is controlled by the circuit board to send or receive signals.

Fig. 6 is a simulated scattering parameter diagram of the antenna unit under different conditions. The antenna unit is shown in Figure 4. As shown in FIG. 6, S11 is the reflection coefficient of the first port (polarization 1), and S22 is the reflection coefficient of the second port (polarization 2). In the case of the base antenna 20 without a dielectric body and a casing, the slot 231 antenna itself will not be excited to radiate in the required frequency band (24-36 GHz). After adding the dielectric body, two resonance points can be found on the scattering parameter (S parameter). Considering the dielectric body 30 and the housing 10 at the same time, a better S-parameter curve and better polarization isolation are achieved in the required frequency band. In this embodiment, when the basic antenna 20 in the antenna unit radiates a signal, an electric field is formed on the surface of the basic antenna 20. Under the influence of the resonator, the electric field generates a resonance point in the required frequency band, and the resonator is radiated by the electric field. , Resonates with the electric field, and then generates another resonant frequency point, thereby expanding the bandwidth of the basic antenna 20 and further expanding the bandwidth of the antenna unit to meet the performance requirements of the antenna unit. In other words, the base antenna 20 meets the millimeter wave antenna frequency band by resonating with the resonator.

Please refer to FIGS. 7-8. FIG. 7 is a schematic diagram of the low-frequency electric field distribution at the first port of the antenna unit, and FIG. 8 is a schematic diagram of the high-frequency electric field distribution at the first port of the antenna unit. It can be seen from Figures 7 and 8 that the low-frequency (25.8GHz) electric field of the first port (polarization 1, the polarization direction is perpendicular to the middle frame 12) is relatively evenly distributed in the dielectric body 30 and the housing 10 (resonator body) In the first port, the high-frequency (32.1 GHz) electric field is relatively uniformly distributed in the basic antenna 20, that is, the low-frequency part is mainly based on the resonator, and the high-frequency part is mainly based on the basic antenna 20.

Specifically, please refer to Figures 9-11. Figure 9 is a diagram showing the relationship between the dielectric constant of the resonator in the antenna unit and the scattering parameter of the first port. Figure 10 is the height of the dielectric body in the antenna unit and the scattering parameter of the first port. Fig. 11 is a diagram showing the relationship between the length of the slot in the antenna unit and the scattering parameter of the first port. From Figure 9-11, we can see that the dielectric constant of the resonator body and the height of the dielectric body have a greater impact on the low frequency and less on the high frequency; the change of the gap length has less impact on the low frequency and greater impact on the high frequency. . It is concluded that the low frequency mainly corresponds to the resonant mode of the resonator, and the high frequency mainly corresponds to the resonant mode of the basic antenna.

Please refer to FIGS. 12-13. FIG. 12 is a schematic diagram of the low-frequency electric field distribution at the second port of the antenna unit, and FIG. 13 is a schematic diagram of the high-frequency electric field distribution at the second port of the antenna unit. It can be seen from Figures 12 and 13, that the low-frequency (27GHz) electric field of the second port (polarization 2, polarization direction parallel to the middle frame 12) is relatively evenly distributed in the dielectric body 30 and the housing 10 (resonator body) , The high frequency (34.3 GHz) electric field of the second port is relatively evenly distributed in the basic antenna 20, that is, the low frequency part is dominated by the resonator, and the high frequency part is dominated by the basic antenna 20.

Specifically, please refer to Figures 14-16. Figure 14 is a diagram showing the relationship between the dielectric constant of the resonator in the antenna unit and the scattering parameter of the first port. Figure 15 is the height of the dielectric body in the antenna unit and the scattering parameter of the first port. The relationship diagram, FIG. 16 is the relationship diagram between the length of the slot in the antenna unit and the scattering parameter of the first port. It can be seen from Figure 14-16 that changes in the dielectric constant of the resonator and the height of the dielectric have a greater impact on the low frequency and less on the high frequency; the change of the gap length has less impact on the low frequency and greater impact on the high frequency. . It is concluded that the low frequency mainly corresponds to the resonant mode of the resonator, and the high frequency mainly corresponds to the resonant mode of the basic antenna. Among them, for the second port, the inconsistency between the resonance frequency point and the first port is mainly caused by the asymmetry between the dielectric body and the housing.

Please refer to FIG. 17 and FIG. 18. FIG. 17 is the directional pattern and gain of the first port of the antenna unit at two frequency points. Fig. 18 is the directional pattern and gain of the two frequency points of the second port of the antenna unit. As shown in Figure 17, the highest low-frequency gain of the first port is 4.2dB and the efficiency is -0.2dB; the highest high-frequency gain of the first port is 5dB and the efficiency is -0.1dB. As shown in Figure 18, the highest low-frequency gain of the second port is 4.7dB and the efficiency is -0.3dB; the highest high-frequency gain of the second port is 5.7dB and the efficiency is -0.1dB.

Please refer to FIG. 19 and FIG. 20. FIG. 19 is the scattering parameter of the antenna array, and FIG. 20 is the isolation diagram of the antenna array. The antenna array is shown in FIG. 3, and as shown in FIG. 19, the bandwidth of the millimeter wave antenna array in this embodiment basically satisfies the 5G frequency band (n257, n258). The isolation is shown in Figure 20. The isolation between the different polarization units and the polarization isolation within the unit have a better effect in the required frequency band due to differential excitation, and the isolation between the same polarization units is less than -12dB in the required frequency band. .

Please refer to FIGS. 21 and 22. FIG. 21 is a scan diagram of the first port of the antenna array, and FIG. 22 is a scan diagram of the second port of the antenna array. Figure 21 and Figure 22 respectively show the scanning results of the first port and the second port under the action of a 3bit phase shifter. For the first port, the highest gain is 8.68dB and the efficiency is -0.13dB; for the second port, its The highest gain is 9.71dB and the efficiency is -0.51dB.

Please refer to FIG. 23, which is a schematic structural diagram of another embodiment of the electronic device 100 provided in FIG. 2. This embodiment is substantially the same as the previous embodiment. The difference is that in this embodiment, only the second cover 112 (rear cover) is a part of the resonator body. Specifically, the dielectric body 30 is disposed on the base antenna 20, and the surface of the dielectric body 30 away from the base antenna 20 is connected to the second bending portion 1122. The part connecting the second bending portion 1122 and the dielectric body 30 is the resonance region 14. The shape of the body 30 is adapted to the second bending portion 1122. By using the second cover 112 as a part of the resonant body, the negative influence of the rear housing on the antenna unit is avoided, and a new resonance frequency point is also introduced, which expands the bandwidth of the basic antenna 20. Of course, in other embodiments, the medium body 30 may also protrude between the first bending portion 1112 and the second bending portion 1122 (FIG. 24 ). Alternatively, the resonance area 14 is located on the second straight portion 1121, that is, the dielectric body 30 is connected between the first straight portion 1111 and the base antenna 20 (FIG. 25).

The above are only part of the examples and implementations of this application, and the protection scope of this application is not limited to this. Any person skilled in the art can easily think of changes or substitutions within the technical scope disclosed in this application, and they should all be covered. Within the scope of protection of this application. Therefore, the protection scope of this application shall be subject to the protection scope of the claims.

Claims

An electronic device, characterized in that the electronic device includes a basic antenna, a dielectric body, and a housing, the dielectric body is provided on the basic antenna, the housing includes a resonance area, and the housing is located on the The material of the resonance region is a dielectric material, the surface of the dielectric body facing away from the basic antenna is connected to the housing located in the resonance region, and the dielectric body and the housing located in the resonance region are formed together The resonant body can excite the resonant body in the working state of the basic antenna, so that the resonant body participates in radiation, and expands the bandwidth of the basic antenna.
The electronic device according to claim 1, wherein the housing comprises a first cover plate and a second cover plate that are arranged oppositely, and the first bent portion of the first cover plate and the second cover plate The second bending portion of the board is butted, the first bending portion and the second bending portion are provided on the side of the dielectric body facing away from the basic antenna, and the first bending portion and the The part where the second bending part is connected to the dielectric body constitutes the resonance region.
3. The electronic device according to claim 2, wherein the first bending portion is in contact with the second bending portion.
3. The electronic device according to claim 2, wherein a gap is formed between the first bending portion and the second bending portion.
The electronic device according to claim 4, wherein the medium body comprises a main body and a bump, the bump is provided on the connecting surface of the main body and is located in the gap, and the first bending The part and the second bending part are respectively located on both sides of the protrusion.
The electronic device according to claim 5, wherein the connecting surface of the main body includes a first arc surface and a second arc surface, and the bump is located between the first arc surface and the second arc surface. In between, the first bending portion is attached to the first arc surface, and the second bending portion is attached to the second arc surface.
The electronic device according to claim 6, wherein a surface of the bump facing away from the connecting surface and a surface of the first bending portion and the second bending portion facing away from the connecting surface Coplanar.
The electronic device according to any one of claims 1-7, wherein the basic antenna comprises a dielectric plate and a conductive sheet, and the conductive sheet is sandwiched between the dielectric plate and the dielectric body, and The dielectric plate includes a first surface and a second surface opposite to each other. The first surface is used for power feeding, the conductive sheet is located on the second surface, and the conductive sheet is provided with a gap penetrating the conductive sheet.
8. The electronic device according to claim 8, wherein the gap is cross-shaped.
9. The electronic device according to claim 9, wherein the basic antenna comprises a feeder line, the feeder line is cross-shaped, and is arranged on the first surface and is arranged directly opposite to the slot.
The electronic device according to any one of claims 2-7, wherein the number of the basic antenna and the medium body are both multiple, and the basic antenna and the medium are arranged in one-to-one correspondence and arranged as One row forms an antenna array.
The electronic device according to claim 2, wherein the first cover plate comprises a first straight portion, the second cover plate comprises a second straight portion, and two opposite sides of the first straight portion The sides are respectively connected to the first bent portion, opposite sides of the second straight portion are respectively connected to the second bent portion, and the first straight portion and the second straight portion are spaced apart It is arranged so that the first cover plate and the second cover plate form an accommodating space, and the medium body and the basic antenna are located in the accommodating space.
The electronic device according to claim 1, wherein the housing and the medium body are adhered by glue.
The electronic device according to claim 2, wherein the housing further comprises a middle frame, the first cover plate and the second cover plate are installed on opposite sides of the middle frame, and the middle frame The frame includes an avoidance area, the dielectric body and the basic antenna are located in the avoidance area, and the avoidance area is a part of the resonance area.