WO2021052158A1

WO2021052158A1 - Antenna and terminal device

Info

Publication number: WO2021052158A1
Application number: PCT/CN2020/112514
Authority: WO
Inventors: 王岩; 刘华涛; 王吉康; 朱贤滨; 尤佳庆; 龚贻文
Original assignee: 华为技术有限公司
Priority date: 2019-09-18
Filing date: 2020-08-31
Publication date: 2021-03-25
Also published as: CN112531331A; CN112531331B

Abstract

Embodiments of the present application provide an antenna and a terminal device. The antenna comprises: a first radiator, a second radiator and a feeding unit. A gap exists between a first end of the first radiator and a first end of the second radiator, a second end of the first radiator is grounded, and a second end of the second radiator is grounded; the first radiator comprises a first feeding point and a second feeding point, the second feeding point is provided between the first feeding point and the first end of the first radiator, the second radiator comprises a third feeding point and a fourth feeding point, the fourth feeding point is provided between the third feeding point and the second end of the second radiator, a first filter is provided at the fourth feeding point, one end of the first filter is electrically connected to the second radiator at the fourth feeding point, and the other end thereof is grounded. When the feeding unit feeds power at the first feeding point, the second feeding point, the third feeding point, or the fourth feeding point, the antenna may generate a first resonance, a second resonance, a fourth resonance, a fifth resonance, or a sixth resonance.

Description

Antenna and terminal equipment

This application claims the priority of a Chinese patent application filed with the Chinese Patent Office on September 18, 2019, with the application number 201910882097.6 and the application name "An antenna and terminal equipment", the entire content of which is incorporated into this application by reference.

Technical field

This application relates to the field of wireless communication, and in particular to an antenna and terminal equipment.

Background technique

With the continuous development of the communication field, the era of the 5th generation mobile communication technology (the 4th generation mobile communication technology, 5G) has come, and terminal equipment supporting the 5G frequency band will also be launched one after another. In order to allow users to seamlessly transition to the 5G era, 5G and 4G/3G/2G will inevitably coexist for a period of time. As the current terminal equipment pursues miniaturization, especially the higher requirements for thickness, how to design a 5G antenna on the basis of the existing space of the terminal equipment, and how to design the original 2G/3G/4G antenna of the terminal equipment A small impact is the focus of 5G antenna system design.

Summary of the invention

The embodiment of the application provides an antenna and terminal equipment, which can design a 5G antenna with higher efficiency through the frame of the terminal equipment in the space of the original 2G/3G/4G antenna of the terminal equipment, and the 5G antenna and the space The other antennas inside have better isolation, which meets the needs of multi-antenna systems.

In a first aspect, an antenna is provided, which is applied to a terminal device, and includes: a first radiator and a second radiator, the first end of the first radiator and the first end of the second radiator are different There is a gap, the second end of the first radiator is grounded, and the second end of the second radiator is grounded; wherein, the first radiator includes a first feeding point, and the second end of the first radiator is grounded. During point feeding, the antenna produces a first resonance; a second feeding point is included between the first feeding point and the first end of the first radiator, and the second feeding point is fed When the first radiator is coupled with the second radiator through the slot, the antenna generates a second resonance and a third resonance; the second radiator includes a third feeding point, which is When the electric point is fed, the antenna generates a fourth resonance and a fifth resonance; a fourth feeding point is included between the third feeding point and the second end of the second radiator. When the feeding point is fed, the antenna generates a sixth resonance, the fourth feeding point is provided with a first filter, and one end of the first filter is at the fourth feeding point and the second radiator Electrically connected, the other end of the first filter is grounded, the first filter is used to ground when the antenna generates the fourth resonance and the fifth resonance, the resonance point of the first resonance, the The resonance point of the second resonance, the resonance point of the third resonance, the resonance point of the fourth resonance, the resonance point of the fifth resonance, and the resonance point of the sixth resonance are all different.

It should be understood that the resonance point of the first resonance, the resonance point of the second resonance, the resonance point of the third resonance, the resonance point of the fourth resonance, the resonance point of the fifth resonance, and the The resonance point of the sixth resonance.

According to the technical solution of the embodiment of the present application, when the antenna generates the first resonance, the working bandwidth can cover the low frequency band of 2G/3G/4G, and when the antenna generates the second resonance and the third resonance, the working bandwidth can cover part of the 5G frequency band, for example , N77 and N79, when the antenna generates the fourth resonance and the fifth resonance, the working bandwidth can cover the 2G/3G/4G middle frequency band, when the antenna generates the sixth resonance, the working bandwidth can cover part of the GPS system frequency band, for example, L5. The antenna can design a 5G main antenna in the space of the original 2G/3G/4G antenna through the frame of the terminal device to meet the needs of the multi-antenna system.

With reference to the first aspect, in some implementations of the first aspect, the second end of the first radiator is electrically connected to the middle frame of the terminal device to realize the grounding of the second end of the first radiator; The second end of the second radiator is electrically connected to the middle frame of the terminal device to realize the grounding of the second end of the second radiator.

According to the technical solution of the embodiment of the present application, the first radiator and the second radiator are electrically connected to the middle frame of the terminal device to achieve grounding, so that better radiation characteristics can be obtained.

With reference to the first aspect, in some implementations of the first aspect, the antenna further includes: a first parasitic stub for expanding the bandwidth when the antenna generates the second resonance or the third resonance, so The first radiator couples and feeds power to the first parasitic branch.

According to the technical solution of the embodiment of the present application, when the antenna generates the second resonance and the third resonance, its working bandwidth can cover the 5G frequency band. Since the bandwidth of N77 in the 5G frequency band is wider, in order to ensure that the antenna can cover its frequency band, it can be increased by The first parasitic stub increases the working bandwidth of the antenna.

With reference to the first aspect, in some implementations of the first aspect, the antenna further includes: a third radiator and a fourth radiator; wherein, the third radiator includes a fifth feeding point, and the feeding When the electric unit is fed at the fifth feeding point, the fourth radiator is coupled and fed by the third radiator, and the antenna generates a seventh resonance.

According to the technical solution of the embodiment of the present application, when the antenna generates the seventh resonance, it can be used as a diversity antenna in the 5G frequency band, so that a more complete 5G antenna system can be realized in the original space.

With reference to the first aspect, in some implementations of the first aspect, the antenna further includes: a fifth radiator, and the fifth radiator and the third radiator extend along a length perpendicular to the fourth radiator The direction of the radiator is symmetrical, the fifth radiator includes a sixth ground point, and the fifth radiator is grounded at the sixth ground point.

According to the technical solution of the embodiment of the present application, after the fifth radiator is added, since it is symmetrical with the third radiator, the symmetry of the antenna is better, which can effectively improve the performance of the antenna.

It should be understood that the vertical in this application may be approximately vertical, and the two may be at an angle of 89°, 91°, or other similar angles.

With reference to the first aspect, in some implementations of the first aspect, the fifth radiator is electrically connected to the printed circuit board PCB of the terminal device to realize that the fifth radiator is at the sixth ground point. Grounded.

According to the technical solution of the embodiment of the present application, since the floor adopts the PCB of the terminal device when the seventh resonance is generated, less energy is radiated outward through the floor. Therefore, when the antenna generates the second resonance, the third resonance, and the seventh resonance When, its isolation is better than ECC.

With reference to the first aspect, in some implementations of the first aspect, the antenna further includes: a second parasitic stub, and the second parasitic stub and the third radiator are respectively located on both sides of the fourth radiator The second parasitic stub is coupled and fed through the fourth radiator, and is used to cause the antenna to generate an eighth resonance.

According to the technical solution of the embodiment of the present application, when the antenna generates the seventh resonance, its working bandwidth can be increased by adding the second parasitic stub.

In a second aspect, a terminal device is provided, and the terminal device may include any one of the antennas in the first aspect.

In a third aspect, an antenna is provided, including: a first radiator and a second radiator, a gap exists between the first end of the first radiator and the first end of the second radiator, the The second end of the first radiator is grounded, and the second end of the second radiator is grounded; wherein, the first radiator includes a first feeding point and a second feeding point, and the second feeding point Is arranged between the first ends of the first radiator; the second radiator includes a third feeding point and a fourth feeding point, and the fourth feeding point is arranged on the second radiator Between the second ends, the fourth feed point is provided with a first filter, one end of the first filter is electrically connected to the second radiator at the fourth feed point, and the first filter The other end is grounded.

With reference to the third aspect, in some implementations of the third aspect, the antenna is used to generate a first resonance, a second resonance, a third resonance, a fourth resonance, a fifth resonance, and a sixth resonance; and the first resonance The resonance point of a resonance, the resonance point of the second resonance, the resonance point of the third resonance, the resonance point of the fourth resonance, the resonance point of the fifth resonance, and the resonance point of the sixth resonance They are all different.

With reference to the third aspect, in some implementations of the third aspect, the second end of the first radiator is electrically connected to the middle frame of the terminal device to realize the grounding of the second end of the first radiator; The second end of the second radiator is electrically connected to the middle frame of the terminal device to realize the grounding of the second end of the second radiator.

With reference to the third aspect, in some implementations of the third aspect, the antenna further includes: a first parasitic stub, and the vertical distance from any point on the first parasitic stub to the first radiator is less than a first threshold .

With reference to the third aspect, in some implementation manners of the third aspect, the antenna further includes: a third radiator and a fourth radiator, and the third radiator includes a fifth feeding point.

With reference to the third aspect, in some implementations of the third aspect, the antenna further includes: a fifth radiator, and the fifth radiator and the third radiator extend along a length perpendicular to the fourth radiator The direction of the radiator is symmetrical, the fifth radiator includes a sixth ground point, and the fifth radiator is grounded at the sixth ground point.

With reference to the third aspect, in some implementation manners of the third aspect, the fifth radiator is electrically connected to the PCB of the terminal device to realize that the fifth radiator is grounded at the sixth ground point.

With reference to the third aspect, in some implementation manners of the third aspect, the antenna further includes:

The second parasitic stub, the second parasitic stub and the third radiator are respectively located on both sides of the fourth radiator, the fourth radiator is coupled and fed to the second parasitic stub, and the second The vertical distance from any point on the parasitic branch to the fourth radiator is less than the fourth threshold.

In a fourth aspect, a terminal device is provided. The terminal device includes a first radiator, a second radiator, a third radiator, a fourth radiator, a fifth radiator, a first parasitic branch, and a second parasitic radiator. In the branch, there is a gap between the first end of the first radiator and the first end of the second radiator, the second end of the first radiator is grounded, and the second end of the second radiator is grounded. Grounding; wherein, the first radiator includes a first feeding point, when the first feeding point is fed, the antenna generates a first resonance; the first feeding point and the first radiation A second feeding point is included between the first ends of the body. When the second feeding point is fed, the first radiator is coupled with the second radiator through the gap, and the antenna generates a second resonance And a third resonance; the second radiator includes a third feeding point, when the third feeding point is fed, the antenna generates a fourth resonance and a fifth resonance; the third feeding point and A fourth feeding point is included between the second ends of the second radiator. When the fourth feeding point is fed, the antenna generates a sixth resonance, and the fourth feeding point is provided with a first filter One end of the first filter is electrically connected to the second radiator at the fourth feeding point, and the other end is grounded. The first filter is used to cause the antenna to generate the fourth resonance and the Grounding at the fifth resonance; the second end of the first radiator is electrically connected to the middle frame of the terminal device to realize the grounding of the second end of the first radiator; the second end of the second radiator The terminal is electrically connected to the middle frame of the terminal device to realize the grounding of the second terminal of the second radiator; the first parasitic stub is coupled and fed through the first radiator, and is used to expand the antenna generated by the antenna. The bandwidth at the second resonance or the third resonance; the third radiator includes a fifth feeding point, and when the fifth feeding point is fed, the fourth radiator is fed by the third The radiator is coupled and fed, and the antenna generates a seventh resonance; the fifth radiator and the third radiator are symmetrical along a direction perpendicular to the length of the fourth radiator, and the fifth radiator includes a sixth radiator. Ground point, the fifth radiator is grounded at the sixth ground point; the fifth radiator is electrically connected to the printed circuit board PCB of the terminal device to realize the fifth radiator in the sixth connection The location is grounded; the second parasitic stub and the third radiator are respectively located on both sides of the fourth radiator, and the fourth radiator couples and feeds the second parasitic stub to make the antenna The eighth resonance is generated.

Description of the drawings

Fig. 1 is a schematic diagram of a terminal device provided by an embodiment of the present application.

FIG. 2 is a schematic diagram of the structure of an antenna provided by an embodiment of the present application.

FIG. 3 is a schematic structural diagram of an antenna grounding solution provided by an embodiment of the present application.

FIG. 4 is a schematic structural diagram of an antenna feeding solution provided by an embodiment of the present application.

Fig. 5 is a schematic structural diagram of another antenna provided by an embodiment of the present application.

FIG. 6 is a schematic structural diagram of another antenna provided by an embodiment of the present application.

Fig. 7 is a schematic diagram of S parameters of the antenna shown in Fig. 6.

FIG. 8 is a schematic diagram of a matching network 200 provided by an embodiment of the present application.

FIG. 9 is a schematic structural diagram of another antenna provided by an embodiment of the present application.

detailed description

The technical solution in this application will be described below in conjunction with the accompanying drawings.

The terminal device in the embodiment of the present application may be a mobile phone, a tablet computer, a notebook computer, a smart bracelet, a smart watch, a smart helmet, a smart glasses, and the like. The terminal device can also be a cellular phone, a cordless phone, a session initiation protocol (SIP) phone, a wireless local loop (WLL) station, a personal digital assistant (PDA), and wireless communication. Functional handheld devices, computing devices, or other processing devices connected to wireless modems, vehicle-mounted devices, terminal devices in 5G networks, or terminal devices in public land mobile networks (PLMN) that will evolve in the future. The application embodiment does not limit this.

FIG. 1 is a schematic diagram of a terminal device 100 provided by an embodiment of the present application. Here, the terminal device 100 is used as a mobile phone for description.

As shown in Figure 1, the terminal device 100 has a cube-like shape, and can include a frame 10 and a display screen 20. Both the frame 10 and the display screen 20 can be installed on the middle frame (not shown in the figure), and the frame 10 can be divided into The upper frame, the lower frame, the left frame, and the right frame are connected to each other, and a certain arc or chamfer can be formed at the joint.

The terminal device 100 also includes a printed circuit board (PCB) installed inside. Electronic components can be installed on the PCB. The electronic components can include capacitors, inductors, resistors, processors, cameras, flashlights, microphones, batteries, etc. Not limited to this.

The frame 10 may be a metal frame, such as metals such as copper, magnesium alloy, and stainless steel, or a plastic frame, a glass frame, a ceramic frame, etc., or a frame that combines metal and plastic.

As the current terminal equipment pursues miniaturization, especially the higher requirements for thickness, how to design a 5G antenna on the basis of the terminal equipment’s 2G/3G/4G antenna system, and compare the original 2G/3G/4G antenna The same below has a small impact, which is the focus of the 5G antenna system design.

This application provides a technical solution for co-located multiple antennas, which can design a 5G primary receiving sensitivity with higher efficiency through the frame of the terminal device in the space of the original 2G/3G/4G antenna. PRX) antenna, and in a similar space by using laser-direct-structuring (LDS), flexible printed circuit (FPC) printing, or floating metal (FLM), etc. in the bracket In this way, a 5G diversity receive sensitivity (diversity receive sensitivity, DRX) antenna is realized. Among them, PRX antennas and DRX antennas have better isolation and lower envelope correlation coefficient (ECC) in a relatively close space, meeting the needs of multi-antenna systems, and can provide 5G mobile phone antenna solutions. A technical reference.

FIG. 2 is a schematic diagram of the structure of an antenna provided by an embodiment of the present application, and the antenna is applied to a terminal device.

As shown in FIG. 2, the antenna may include a first radiator 110 and a second radiator 120. There is a gap between the first end 1101 of the first radiator 110 and the first end 1201 of the second radiator 120. The second end 1102 of the body 110 is grounded, and the second end 1202 of the second radiator 120 is grounded.

It should be understood that the terminal device may further include a feeding unit 130, and the feeding unit 130 may provide an electric signal for an antenna in the terminal device.

Optionally, the first end 1101 of the first radiator 110 may be an end distance of the first radiator 110 from the end point, not a point; the second end 1102 of the first radiator 110 may be the first radiator 110 The distance from one end to the other end is not just a point.

Optionally, the first end 1201 of the second radiator 120 may be an end distance of the second radiator 120 from the end point, not a point; the second end 1202 of the second radiator 120 may be the second radiator 120 The distance from one end to the other end is not just a point.

Wherein, the first radiator 110 includes a first feeding point 1103. When the feeding unit 130 feeds power at the first feeding point 1103, the antenna generates a first resonance; the first feeding point 1103 and the first radiator 110 A second feeding point 1104 is included between one end 1101. When the feeding unit 130 feeds power at the second feeding point 1104, the first radiator 110 is coupled with the second radiator 120 through a gap, and the antenna generates a second resonance and a first resonance. Three resonances; the second radiator includes a third feeding point 1203, when the feeding unit 130 feeds at the third feeding point 1203, the antenna generates fourth and fifth resonances; the third feeding point 1203 and the second radiation A fourth feeding point 1204 is included between the second ends 1202 of the body 120. When the feeding unit 130 feeds power at the fourth feeding point 1204, the antenna generates a sixth resonance, and the fourth feeding point 1204 is provided with a first filter 170 One end of the first filter 170 is electrically connected to the second radiator 120 at the fourth feeding point 1204, the other end of the first filter 170 is grounded, and the first filter 170 is used to make the antenna generate the fourth resonance and the fifth resonance. Grounded.

It should be understood that the first resonance, the second resonance, the third resonance, the fourth resonance, the fifth resonance, and the sixth resonance are all different. That is, in the technical solution of the present application, the antenna includes four feeding unit points, which can generate six points. There are two different resonance modes, which can be the resonance point of the first resonance, the resonance point of the second resonance, the resonance point of the third resonance, the resonance point of the fourth resonance, the resonance point of the fifth resonance, and the resonance point of the sixth resonance. They are all different.

Optionally, the width of the gap formed between the first radiator 110 and the second radiator 120 may be determined according to actual design and simulation requirements.

Optionally, the feeding unit 130 may be arranged on the PCB of the terminal device, and electrically connected to multiple feeding points on the first radiator and the second radiator through a metal dome.

Optionally, the feeding unit 130 may provide electrical signals of different frequencies according to actual needs.

Optionally, the terminal device may also include a switch. The switch may be located between the feeding unit 130 and each feeding point. The switch may be based on the actual needs of the terminal device to enable the feeding unit 130 to feed power at the corresponding feeding point. The antenna works in the corresponding frequency band to meet the working needs of the terminal equipment.

Optionally, the first radiator 110 and the second radiator 120 may be frames in the terminal device, may be located in any two adjacent frames in the terminal device, or both may be located in any frame in the terminal device.

Optionally, the feeding unit 130 feeds at the first feeding point 1103, and when the antenna generates the first resonance, its working bandwidth can cover the low band (LB) of 2G/3G/4G. In this case Below, the first radiator 110 and the feeding unit 130 can form a first antenna. The first antenna can be a LB DRX antenna. When the first antenna generates a first resonance, its working bandwidth can cover 2G/3G/4G LB For example, GSM900 (890MHz-915MHz) in the global system of mobile communication (GSM) system, B5 (824MHz-849MHz) in the wideband code division multiple access (WCDMA) system or long-term evolution ( B8 (880MHz-915MHz) in Long Term Evolution, LTE) system.

Optionally, the frequency range of the LB may be considered to be 690MHz-960MHz. For example, the LB may also include GSM850 (824MHz-849MHz) in the GSM system, B12 (699MHz-716MHz) in the LTE system, and so on.

Optionally, the length of the first radiator 110 is about a quarter of the working wavelength corresponding to the frequency of the resonance point of the first resonance.

Optionally, the feeding unit 130 feeds at the second feeding point 1104, and when the antenna generates the second resonance and the third resonance, its working bandwidth can cover the 5G frequency band. In this case, the first radiator 110, The second radiator 120 and the feeding unit 130 can form a second antenna. The second antenna can be a PRX antenna in the 5G frequency band. When the second antenna generates the second resonance and the third resonance, its working bandwidth can cover the 5G frequency band, for example, N77 (3.3GHz-4.2GHz) and N79 (4.4GHz-5.0GHz).

Optionally, due to the high frequency characteristics of the 5G frequency band, when the feeding unit feeds at the second feeding point 1104, it can couple with the second radiator 120 through the gap, and the first radiator 110 and the second radiator 120 The first feeding point 1103 is along the second feeding point 1104, and the length from the third feeding point 1203 to the fourth feeding point 1204 is approximately the working wavelength corresponding to the frequency of the second resonance point. The first radiator 110 and The length of the second radiator 120 from the first feeding point 1103 along the second feeding point 1104, the third feeding point 1203, and the fourth feeding point 1204 to the second end 1202 of the second radiator 120 is approximately the third The frequency of the resonance point of the resonance corresponds to twice the operating wavelength.

It should be understood that when the second antenna generates the second resonance and the third resonance, it works in the 5G frequency band. Due to its high-frequency characteristics, the current on the radiator can be grounded through each feeding point. Therefore, for the second resonance, the second antenna can work in a loop antenna mode with one working wavelength, which corresponds to N77 in the 5G band, and for the third resonance, the second antenna can work in a loop antenna with two working wavelengths. Mode, corresponding to N79 in the 5G band.

Optionally, when the second antenna works in the 5G frequency band, since the bandwidth of N77 in the 5G frequency band is relatively wide, in order to ensure that the working bandwidth of the antenna covers the N77 frequency band when the second resonance occurs, it can be located near the first radiator 110 The first parasitic branch 140 is set at the position. The first parasitic stub 140 can be placed in parallel with the first radiator 110, and the vertical distance from any point on the first parasitic stub 140 to the first radiator 110 can be less than the first threshold, and the specific value of the first threshold can be obtained by actual simulation . The first parasitic stub 140 is coupled and fed through the first radiator 110, and can be grounded at the first end 1401 of the first parasitic stub 140, and the working bandwidth of the second antenna can be expanded through the first parasitic stub 140.

Optionally, the first parasitic branch 140 may be implemented by using LDS, FPC printing, or FLM on the stent.

Optionally, the first parasitic branches 140 may be arranged in a zigzag shape on the stent.

Optionally, the feeding unit 130 feeds at the third feeding point 1203, and when the antenna generates the fourth resonance and the fifth resonance, its working bandwidth can cover the middle band (MB) of 2G/3G/4G, In this case, the second radiator 120 and the feeding unit 130 can form a third antenna. The third antenna can be a MB DRX antenna. When the third antenna generates the fourth resonance and the fifth resonance, its working bandwidth can cover 2G/3G/4G MB, for example, GSM1800 (1710MHz-1785MHz) in the GSM system, B1 (1920MHz-1980MHz) in the WCDMA system, or B3 (1710MHz-1785MHz) in the LTE system.

Optionally, the frequency range of the MB can be considered to be 1700MHz-2170MHz. For example, the MB can also include GSM1900 (1850MHz-1910MHz) in the GSM system, B33 (1900MHz-1920MHz) in the LTE system, and so on.

Optionally, the frequency of the resonance point of the fourth resonance may be higher than the frequency of the resonance point of the fifth resonance. The length from the first end 1201 to the fourth feeding point 1204 of the second radiator 120 is approximately a quarter of the working wavelength corresponding to the frequency of the resonance point of the fifth resonance. The length of the third feeding point 1203 is approximately a quarter of the operating wavelength corresponding to the frequency of the resonance point of the fourth resonance.

Optionally, the feeding unit 130 feeds at the fourth feeding point 1204, and when the antenna generates the sixth resonance, its working bandwidth can cover one or several frequency bands in the global positioning system (GPS). In this case, the second radiator 120 and the feeding unit 130 can form a fourth antenna, and the fourth antenna can be a GPS antenna. When the fourth antenna generates a sixth resonance, its working bandwidth can cover part of the frequency band in the GPS system. For example, L1 (1575.42MHz±1.023MHz), L2 (1227.60MHz±1.023MHz) or L5 (1176.45MHz±1.023MHz) in the GPS system.

Optionally, the length of the fourth radiator 120 is about a quarter of the working wavelength corresponding to the frequency of the resonance point of the sixth resonance.

Optionally, the first filter 170 is a high-pass filter, a band-pass filter, or a band-stop filter, which can be used to realize that when the antenna generates the fourth resonance and the fifth resonance, the first filter 170 is in a conducting state, and the antenna can be The grounding is achieved through the first filter, and when the antenna generates the sixth resonance, the first filter 170 is in a high impedance state, which is equivalent to an open circuit. That is, when the antenna generates the fourth resonance and the fifth resonance, the second radiator 120 is grounded at the fourth feeding point 1204.

Optionally, the grounding of the second end 1102 of the first radiator 110 may be that the second end 1102 of the first radiator 110 is electrically connected to the middle frame of the terminal device; the grounding of the second end 1202 of the second radiator 120 may be that The second end 1202 of the two radiators 120 is electrically connected to the middle frame of the terminal device.

As shown in FIG. 3, it is a schematic structural diagram of an antenna grounding solution provided by an embodiment of the present application.

The second end 1102 of the first radiator 110 can be electrically connected to the middle frame 150 of the terminal device through the first connector 1501, and the second end 1202 of the second radiator 120 can be electrically connected to the middle frame 150 of the terminal device through the second connector 1502. The block 150 realizes the electrical connection.

Optionally, the first radiator 110 and the second radiator 120 and the middle frame 150 can be electrically connected in a manner that the middle frame and the radiator of the terminal device are integrally formed, or by welding, the first connecting member 1501 is connected to the second The member 1502 is a solder joint, or the first connecting member 1501 and the second connecting member 1502 are metal shrapnel or the like.

Optionally, an insulating material 160 can be filled between the first radiator 110, the second radiator 120 and the middle frame 150. The insulating material 160 can be plastic, rubber, ceramic, etc. The filled insulating material can improve the overall structure of the terminal device The stability.

As shown in Fig. 4, the feed unit of the antenna can be arranged on the PCB 180 of the terminal device, and is electrically connected to the first feeding point or the second feeding point of the first radiator 110 through the elastic piece 1301, or it can be connected to the The third feeding point or the fourth feeding point of the second radiator is electrically connected.

It should be understood that the technical solution provided by the embodiments of the present application can also be applied to the ground structure of the antenna. The antenna is connected to the floor through the elastic sheet. In the terminal device, the floor can be a middle frame or a PCB.

Optionally, the first parasitic stub can also be grounded using this structure, where the first parasitic stub can be provided on the antenna support and electrically connected to the PCB through the elastic sheet 1301 to achieve grounding.

It should be understood that the PCB is formed by pressing a multilayer dielectric board, and there is a metal plating layer in the multilayer dielectric board, which can be used as the floor of the first parasitic branch.

Optionally, the power feeding unit may be a power chip in the terminal device.

As shown in FIG. 5, the antenna may further include a third radiator 210 and a fourth radiator 220. The third radiator 210 may be the fifth feeding point 2101, and the feeding unit 130 may be fed at the fifth feeding point 2101. The fourth radiator 220 is coupled and fed through the third radiator 210 to generate a seventh resonance.

Optionally, the vertical distance from any point on the fourth radiator 220 to the second radiator 120 may be less than the second threshold, and the specific value of the second threshold may be obtained by actual simulation.

Optionally, the vertical distance from any point on the third radiator 210 to the fourth radiator 220 may be less than the third threshold, and the specific value of the third threshold may be obtained by actual simulation.

Optionally, the third radiator 210 may be arranged in parallel with the fourth radiator 220.

Optionally, the third radiator 210 and the fourth radiator 220 may be arranged on the bracket, and the third radiator 210 and the fourth radiator 220 may be arranged in a zigzag shape.

Optionally, the third radiator 210, the fourth radiator 220 and the feeding unit 130 may constitute a fifth antenna, and the fifth antenna may be a 5G band DRX antenna.

Optionally, when the fifth antenna generates the seventh resonance, the working frequency band of the DRX antenna may cover a part of the 5G frequency band, for example, N77.

Optionally, the length of the third radiator 210 is approximately one-half of the operating wavelength corresponding to the frequency of the resonance point of the seventh resonance.

Optionally, the third radiator 210 and the fourth radiator 220 can be implemented by means of LDS, FPC printing or FLM through the bracket.

Optionally, the antenna may further include a fifth radiator 230, the fifth radiator 230 includes a sixth ground point 2301, and the fifth radiator 230 is grounded at the sixth ground point 2301. To ensure its symmetry, the fifth radiator 230 and the third radiator 210 may be symmetrical along a direction perpendicular to the third radiator 220.

It should be understood that after the fifth radiator 230 is added, the fifth antenna adopts symmetric feeding, and its overall symmetry is improved, and its performance can be improved.

Optionally, the fifth radiator 230 may be electrically connected to the PCB at the sixth ground point 2301 through a metal elastic sheet.

Optionally, due to the limited internal space of the terminal device, the third radiator 210, the fourth radiator 220, and the fifth radiator 230 may be placed close to the second radiator 120. This kind of spatial layout, due to the short distance between the various feeding points, and the short distance between the feeding unit and each feeding point, can reduce the transmission line loss and improve the overall performance of the antenna.

It should be understood that when the second antenna resonates through the first radiator 110 and the second radiator 120, the first radiator 110 and the second radiator 120 are electrically connected to the middle frame of the electronic device, and the middle frame is the floor. The fourth radiator 220 of the fifth antenna is electrically connected to the PCB, and the PCB is the floor. When the second antenna resonates through the first radiator 110 and the second radiator 120, energy is radiated outward through the floor, and the fifth antenna When resonance is generated by the fourth radiator 220, less energy is radiated outward through the floor. Therefore, when the working bandwidth of the two antennas covers the 5G frequency band, the isolation and ECC of the two antennas are better, which meets the technical requirements.

The technical solution of the embodiment of this application can design a 5G PRX antenna through the frame of the terminal device in the space of the original 2G/3G/4G antenna, and use LDS, FPC printing or printing on the bracket in a similar space. A 5G DRX antenna is implemented using FLM and other methods. Among them, the PRX antenna and the DRX antenna have better isolation and lower ECC in a relatively close space, which meets the needs of a multi-antenna system.

As shown in FIG. 6, the antenna may further include a second parasitic stub 250, and the second parasitic stub 250 and the third radiator 210 are respectively located on both sides of the fourth radiator 240. Wherein, the second parasitic stub 240 is coupled and fed through the fourth radiator 220 to cause the antenna to generate an eighth resonance.

Optionally, the second parasitic branch 250 may be arranged in parallel with the fourth radiator.

Optionally, the second parasitic branch 250 may be arranged on the support, and the third radiator 210 and the fourth radiator 220 may be arranged in a zigzag shape.

Optionally, the vertical distance from any point on the second parasitic branch 250 to the fourth radiator 240 is less than the fourth threshold, and the specific value of the fourth threshold may be obtained by actual simulation.

Optionally, the length of the second parasitic stub 250 is approximately one-half of the operating wavelength corresponding to the resonance point of the eighth resonance.

It should be understood that since the fifth antenna adds the second parasitic stub 240, the seventh resonance and the eighth resonance can be generated, and the fifth antenna works in the 5G frequency band, so the bandwidth of the seventh resonance can cover the N77 in 5G and the eighth resonance. Bandwidth can cover N79 in 5G.

Fig. 7 is a schematic diagram of S parameters of the antenna shown in Fig. 6.

As shown in Fig. 7, when the feeding unit feeds at the second feeding point of the first radiator and the fifth feeding point of the fourth radiator, the second antenna generates the second resonance and the third resonance, and the fifth antenna The seventh resonance and the eighth resonance are generated. In FIG. 7, S1, 1 is the reflection coefficient of the second antenna, S2, 2 is the reflection coefficient of the fifth antenna, S1, 2 and S2, and 1 is the isolation between the second antenna and the fifth antenna.

In the technical solution of the embodiment of this application, since the second antenna is a PRX antenna in the 5G frequency band, the middle frame of the terminal device is used as the floor to radiate electromagnetic waves, and the fifth antenna is a DRX antenna in the 5G frequency band, and the PCB of the terminal device is used as the floor. Electromagnetic waves are radiated outward, so the second antenna and the fifth antenna have excellent isolation under the premise of ensuring the working bandwidth. At the same time, since the PRX antenna of the 5G frequency band radiates energy outwards through the floor, and the DRX antenna of the 5G frequency band radiates less energy outwards through the floor, the radiation patterns of the two antennas are complementary, making the second antenna and the fifth antenna. The ECC between the antennas is low.

Optionally, the antenna may also include a matching network.

As shown in FIG. 8, taking the fifth antenna as an example, a matching network 200 may be added between the fifth feeding point 2101 of the third radiator 210 and the feeding unit 130.

The matching network can match the electrical signal in the feed unit with the characteristics of the radiator, and minimize the transmission loss and distortion of the electrical signal.

The matching network 200 may include a first capacitor 2102, a first inductor 2103, and a second capacitor 2104. The first inductor 2103 is connected in series between the feeding unit 130 and the third radiator 210, the first capacitor 2102 is connected in parallel between the feeding unit 130 and the first inductor 2103, and the second capacitor 2104 is connected between the first inductor 2103 and the third radiator 210. Between the radiators and connect to the ground. The specific values of the first capacitor 2102, the first inductance 2103, and the second capacitor 2104 can be obtained by calculation and simulation.

It should be understood that a matching network can be added between the first feeding point and the second feeding point of the feeding unit and the first radiator, and the third feeding point and the fourth feeding point of the feeding unit and the second radiator can be added. A matching network may also be added between the feeding points. The embodiment of the present application only provides an exemplary matching network, and does not limit the specific form of the matching network.

As shown in Figure 9, the second antenna is used as a PRX antenna in the 5G frequency band. The main resonance of its work comes from the frame of the terminal device. The bandwidth can also be expanded through the first parasitic stub 140 and other parasitic stubs on the bracket, for example, A third parasitic stub 190 may be added, and the parasitic stub on the support is coupled and fed through the first radiator 110, and resonates in the 1/4 wavelength mode. The fifth antenna, as a DRX antenna in the 5G frequency band, can cover multiple frequency bands through the second parasitic stub 240 and other multiple parasitic stubs on the stent. For example, a fourth parasitic stub 250 can be added, and the parasitic stubs on the stent radiate through the fourth The body 220 is coupled to feed and resonates in the 1/2 wavelength mode. Feed power through coupling at one end of the parasitic stub, and ground at the other end of the parasitic stub, so that the parasitic stub has a more pure symmetrical 1/2 wavelength mode. At this time, the DRX antenna and PRX antenna of the 5G frequency band have better isolation And lower ECC.

The technical solution of the embodiment of this application can increase the 5G antenna frequency band on the basis of the original 2G/3G/4G antenna structure of the terminal equipment, and design the PRX antenna of the 5G frequency band through the metal frame of the terminal equipment, and in a similar space The DRX antenna of the 5G frequency band is realized by using LDS, FPC printing or FLM in the bracket. The PRX antenna in the 5G frequency band and the 2G/3G/4G antenna in the embodiment of the present application are structured together, which has better antenna efficiency, and at the same time, occupies a small structure space. Because it occupies a small architectural space, the distance from the feeding unit to each feeding point for feeding is relatively short, so the transmission line loss is lower and the overall performance is better.

In the several embodiments provided in this application, it should be understood that the disclosed system, device, and method may be implemented in other ways. For example, the device embodiments described above are merely illustrative, for example, the division of the units is only a logical function division, and there may be other divisions in actual implementation, for example, multiple units or components may be combined or It can be integrated into another system, or some features can be ignored or not implemented. In addition, the displayed or discussed mutual coupling or direct coupling or communication connection may be indirect coupling or communication connection through some interfaces, devices or units, and may be in electrical or other forms.

The above are only specific implementations of this application, but 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. Should be covered within the scope of protection of this application. Therefore, the protection scope of this application should be subject to the protection scope of the claims.

Claims

An antenna applied to terminal equipment, characterized in that it includes:

A first radiator and a second radiator, there is a gap between the first end of the first radiator and the first end of the second radiator, the second end of the first radiator is grounded, the The second end of the second radiator is grounded;

Wherein, the first radiator includes a first feeding point, and when the first feeding point is fed, the antenna generates a first resonance;

A second feeding point is included between the first feeding point and the first end of the first radiator, and when the second feeding point is fed, the first radiator passes through the gap and communicates with the The second radiator is coupled, and the antenna generates a second resonance and a third resonance;

The second radiator includes a third feeding point, and when the third feeding point is fed, the antenna generates a fourth resonance and a fifth resonance;

A fourth feeding point is included between the third feeding point and the second end of the second radiator. When the fourth feeding point is fed, the antenna generates a sixth resonance, and the first A first filter is provided at four feeding points, one end of the first filter is electrically connected to the second radiator at the fourth feeding point, the other end of the first filter is grounded, and the first filter A device for grounding the antenna when the fourth resonance and the fifth resonance are generated;

The resonance point of the first resonance, the resonance point of the second resonance, the resonance point of the third resonance, the resonance point of the fourth resonance, the resonance point of the fifth resonance, and the sixth resonance The resonance points are all different.
The antenna according to claim 1, wherein:

The second end of the first radiator is electrically connected to the middle frame of the terminal device to realize the grounding of the second end of the first radiator;

The second end of the second radiator is electrically connected to the middle frame of the terminal device to realize the grounding of the second end of the second radiator.
The antenna according to claim 1 or 2, wherein the antenna further comprises:

The first parasitic stub is used to expand the bandwidth when the antenna generates the second resonance or the third resonance, and the first radiator couples and feeds the first parasitic stub.
The antenna according to any one of claims 1 to 3, wherein the antenna further comprises:

The third radiator and the fourth radiator;

Wherein, the third radiator includes a fifth feeding point, and when the feeding unit feeds power at the fifth feeding point, the third radiator couples and feeds power to the fourth radiator, so The antenna produces a seventh resonance.
The antenna according to claim 4, wherein the antenna further comprises:

A fifth radiator, the fifth radiator and the third radiator are symmetrical along a direction perpendicular to the length of the fourth radiator, the fifth radiator includes a sixth ground point, and the fifth radiator Ground at the sixth ground point.
The antenna according to claim 5, wherein:

The fifth radiator is electrically connected to the printed circuit board PCB of the terminal device to realize that the fifth radiator is grounded at the sixth grounding point.
The antenna according to claim 5 or 6, wherein the antenna further comprises:

The second parasitic stub, the second parasitic stub and the third radiator are respectively located on both sides of the fourth radiator, and the fourth radiator couples and feeds power to the second parasitic stub for making all The antenna produces an eighth resonance.
A terminal device, characterized in that the terminal device includes the antenna according to any one of claims 1 to 7.
An antenna applied to terminal equipment, characterized in that it includes:

A first radiator and a second radiator, there is a gap between the first end of the first radiator and the first end of the second radiator, the second end of the first radiator is grounded, the The second end of the second radiator is grounded;

Wherein, the first radiator includes a first feeding point and a second feeding point, and the second feeding point is arranged between the first feeding point and the first end of the first radiator ；

The second radiator includes a third feeding point and a fourth feeding point, and the fourth feeding point is disposed between the third feeding point and the second end of the second radiator, so The fourth feeding point is provided with a first filter, one end of the first filter is electrically connected to the second radiator at the fourth feeding point, and the other end of the first filter is grounded.
The antenna according to claim 9, wherein the antenna is used to generate a first resonance, a second resonance, a third resonance, a fourth resonance, a fifth resonance, and a sixth resonance;

And the resonance point of the first resonance, the resonance point of the second resonance, the resonance point of the third resonance, the resonance point of the fourth resonance, the resonance point of the fifth resonance, and the resonance point of the sixth resonance The resonance points of resonance are all different.
The antenna according to claim 9 or 10, wherein:

The second end of the first radiator is electrically connected to the middle frame of the terminal device to realize the grounding of the second end of the first radiator;

The second end of the second radiator is electrically connected to the middle frame of the terminal device to realize the grounding of the second end of the second radiator.
The antenna according to any one of claims 9 to 11, wherein the antenna further comprises:

The first parasitic branch, the vertical distance from any point on the first parasitic branch to the first radiator is less than a first threshold.
The antenna according to any one of claims 9 to 12, wherein the antenna further comprises:

A third radiator and a fourth radiator, the third radiator including a fifth feeding point.
The antenna according to claim 13, wherein the antenna further comprises:

A fifth radiator, the fifth radiator and the third radiator are symmetrical along a direction perpendicular to the length of the fourth radiator, the fifth radiator includes a sixth ground point, and the fifth radiator Ground at the sixth ground point.
The antenna according to claim 14, wherein:

The fifth radiator is electrically connected to the PCB of the terminal device to realize that the fifth radiator is grounded at the sixth ground point.
The antenna according to claim 14 or 15, wherein the antenna further comprises:

The second parasitic stub, the second parasitic stub and the third radiator are respectively located on both sides of the fourth radiator, the fourth radiator is coupled and fed to the second parasitic stub, and the second The vertical distance from any point on the parasitic branch to the fourth radiator is less than the fourth threshold.