WO2023124222A1

WO2023124222A1 - Terminal device

Info

Publication number: WO2023124222A1
Application number: PCT/CN2022/117894
Authority: WO
Inventors: 何鑫
Original assignee: 中兴通讯股份有限公司
Priority date: 2021-12-30
Filing date: 2022-09-08
Publication date: 2023-07-06
Also published as: CN116419509A

Abstract

Provided in the present application is a terminal device. The terminal device comprises a panel, a middle frame and a back plate which are arranged in a stacked manner, at least one of the panel, the middle frame and the back plate being provided with at least one group of first antennas (11); and the terminal device further comprises a printed circuit board (2) fixedly connected to the middle frame or the back plate, wherein the printed circuit board (2) is provided with at least one group of second antennas (21), and feed points and grounding points of the second antennas (21) are all arranged on the printed circuit board (2).

Description

a terminal device

Cross References to Related Applications

This application claims the priority of Chinese patent application 202111648428.3 filed on December 30, 2021, entitled "A Terminal Device", the entire contents of which are incorporated into this application by reference.

technical field

Embodiments of the present disclosure relate to but not limited to the technical field of antennas, and in particular, relate to but not limited to a terminal device.

Background technique

With the development of network technology, in order to adapt to various wireless communication connections, the number of antennas inside the terminal equipment is increasing, and based on the industrial design of the terminal equipment, component stacking and other considerations, it is suitable for the clearance area of the antenna But it is getting smaller and smaller, so the isolation between antennas will inevitably decrease. However, the reduction of the isolation between the antennas leads to a tight distance between the antennas, and a serious coupling problem between the antennas, which seriously affects the transmitting and receiving performance of the antennas.

Contents of the invention

An embodiment of the present disclosure provides a terminal device. The terminal device includes a stacked panel, a middle frame, and a backplane; at least one of the panels, the middle frame, and the backplane is provided with at least one set of first An antenna; the terminal device further includes a printed circuit board fixedly connected to the middle frame or the backplane, wherein at least one group of second antennas is arranged on the printed circuit board, and the feed point of the second antenna and The grounding points are all set on the printed circuit board.

Description of drawings

FIG. 1 is a schematic diagram of an antenna layout structure of a terminal device in the related art;

FIG. 2 is a schematic diagram of an antenna layout structure of a terminal device in an embodiment of the present disclosure;

3 is a cross-sectional view of a second antenna arranged on a printed circuit board in an embodiment of the present disclosure; and

Fig. 4 is a reflection coefficient test diagram of the second antenna in the embodiment of the present disclosure as 2.4G WIFI.

Detailed ways

In order to make the purpose, technical solutions and advantages of the present disclosure clearer, the embodiments of the present disclosure will be further described in detail below through the implementation manners in conjunction with the accompanying drawings. It should be understood that the embodiments described here are only used to explain the present disclosure, not to limit the present disclosure.

In order to widen the layout position of the antenna, reduce the antenna coupling, and improve the radiation quality of the antenna, this embodiment provides a terminal device, which includes a stacked panel, a middle frame, and a backplane; the panel, the middle frame, and the backplane , at least one of which is provided with at least one set of first antennas 11; the terminal device also includes a printed circuit board 2 fixedly connected to the middle frame or the backplane.

At least one set of second antennas 21 is arranged on the printed circuit board 2 , and the feeding point and the grounding point of the second antenna 21 are both arranged on the printed circuit board 2 .

The structure of the terminal device can include a panel, a middle frame, and a backplane; among them, the panel generally includes components such as a cover glass, a touch module, and a display module. According to different display types, the display module can be an LCD (Liquid Crystal Display , liquid crystal display) backlight module, or organic light-emitting diode self-luminous OLED, or miniLED or microLED formed by electrodeless light-emitting diodes, etc. The middle frame and the back cover can be integrated in the design of some terminal devices, and the upper, lower, left, and right edge areas can be used to set up antennas, that is, as the antenna layout area 1, where the first antenna 11 is set.

In addition to the structures that exist as the frame of the terminal equipment, such as the panel, the middle frame, and the backplane, the terminal equipment also includes at least one printed circuit board 2, and the printed circuit board 2 is equipped with a Components, including but not limited to central processing unit, graphics processing unit, memory RAM (Random Access Memory, random access memory), storage unit ROM (Read Only Memory, read-only memory), and cameras, speakers, microphones, etc. device.

There are various antennas installed on the terminal equipment. According to the different functions and frequency bands of the antennas, these antennas may include but not limited to: GPS (Global Positioning System, Global Positioning System) antennas; WIFI (wireless network communication technology) antennas, Related technologies include 2.4GHz frequency band and 5GHz frequency band; 2G antenna, 3G antenna; 4G LTE (Long Term Evolution, long-term evolution of general mobile communication technology) antenna; 5G antenna and so on. According to the structural difference of the antenna, it can include monopole antenna, double ground antenna, loop antenna, T-shaped antenna, IFA (inverted F) antenna, PIFA (planar inverted F, picofarad) antenna and so on.

The type of the first antenna 11 can include any antenna listed above; and according to the arrangement of the antenna, the arrangement of the first antenna 11 can include at least one of the following: FPC (Flexible Printed Circuit, flexible circuit board), LDS (Laser Direct Structuring, laser direct structuring), PDS (Printing Direct Structuring, direct printing production), metal steel sheet. In the related art, the layout positions of the antennas are all concentrated in the antenna layout area 1, please refer to Figure 1, which shows a schematic diagram of the antenna layout in the related technology, and it can be seen that the position spacing between the antennas is relatively small .

In order to achieve the effect of increasing the spacing between the antennas under the original terminal space structure, in addition to the antenna layout area 1 set on the panel, middle frame, backplane, etc. in this embodiment, it may also include Other parts for installing the antenna, the location of the layout is the printed circuit board 2 mentioned in the above embodiment; although the integration of the printed circuit board 2 is high, there is still a certain space in some positions, there is The clearance area where the antenna can be arranged, so the second antenna 21 can be arranged on the printed circuit board 2, and the space of the printed circuit board 2 can be used, compared with the existing antenna arrangement area 1, without changing the antenna arrangement area Under the premise of 1, the actual location where the antenna can be installed is increased. For each antenna on the terminal device, the location is increased, but the number of antennas does not change, so the corresponding distance between the antennas can be The setting is larger, thereby reducing the coupling between the antennas and improving the radiation performance of the antennas. Please refer to FIG. 2. FIG. 2 shows a schematic diagram of the layout of the antennas on the terminal equipment after the second antenna 21 is arranged on the printed circuit board 2. It can be seen that the distance between the antennas has been enlarged. Significantly improve the coupling between antennas and improve radiation performance.

Wherein, the second antenna 21 is arranged on the printed circuit board 2 in such a way that the feeding point and the grounding point of the second antenna 21 are both arranged on the printed circuit board 2, and the grounding point is directly connected to the printed circuit board 2 land.

The setting type of the second antenna 21 can be similar to that of the first antenna 11, that is to say, the second antenna 21 can also be a monopole antenna, a double ground antenna, a loop antenna, a T-shaped antenna, an IFA antenna, a PIFA antenna and the like.

In some embodiments, in order to accommodate the limited space on the printed circuit board 2 , various parts of the metal components of the second antenna 21 may be respectively arranged on the upper and lower surfaces of the printed circuit board 2 . By arranging the metal components of the second antenna 21 on the upper and lower surfaces of the printed circuit board 2 , the space requirement for the printed circuit board 2 can be effectively reduced, and more positions of the second antenna 21 can be arranged on the printed circuit board 2 .

In some embodiments, in order to reduce the difficulty of laying the second antenna 21, the setting type of the second antenna 21 may include a slot antenna, and the metal components of the slot antenna include a slot member 211, a feed member 212 and a grounding member 213, and the slot antenna The member 211 is arranged on the upper surface of the printed circuit board 2 as the radiation point of the second antenna 21; the grounding member 213 of the slot antenna is arranged on the lower surface of the printed circuit board 2 as the grounding point of the second antenna 21; the feeding member 212 Connect the slot member 211 and the ground member 213 as the feed point of the second antenna 21 , please refer to FIG. 3 . The slot antenna refers to a slot in the metal cavity or waveguide wall to radiate and receive radiation signals. The radiation principle of the slot antenna is to feed through the feed point, and the energy of the antenna passes through the end of the feed line and the parasitic The gap between the ends radiates out; for the slot antenna, the layout position of the slot is the position where the antenna radiates and transmits and receives, that is, the corresponding slot in the slot member 211 in this embodiment, which serves as the radiation of the second antenna 21. point. The ground member 213 corresponds to the ground point of the second antenna 21 , and the ground member 213 is connected to the ground on the printed circuit board 2 . The feeding point of the slot antenna, that is, the setting position of the feeding member 212, is connected between the slot member 211 and the grounding member 213 of the second antenna 21; in other words, the slot member 211 is arranged on the upper surface of the printed circuit board 2, The grounding member 213 is arranged on the lower surface of the printed circuit board 2 , and the feeding member 212 is arranged on the position of the normal direction of the upper and lower surfaces of the printed circuit board 2 . It is worth mentioning that, in the slot member 211 of the slot antenna, since it is provided with a slot, the slot member 211 also includes two outer ends for connection in addition to the slot, so in order to communicate with the ground member 213, it is necessary Both ends are connected to the grounding member 213 through metal components; and the metal component connected to one of the ends serves as the feed member 212 . In the setting of the slot antenna, only the position of the slot needs to be set in the clear area, and the setting position of other metal components has no effect on other antennas except for the overall length of the slot antenna, which has a certain impact on the frequency domain of the slot antenna itself , so the use of the slot antenna can reduce the difficulty of laying the second antenna 21 and improve the radiation performance of the terminal.

The longer the length of the slot antenna, the lower the frequency range of the antenna. For example, when the length of the slot antenna is about 60mm, if the common dielectric constant of the printed circuit board 2 is 4.2, then it can achieve 2.4GHz-2.5GHz The bandwidth, that is, the frequency domain range of 2.4G WIFI. The longer the length of the slot antenna, the lower the radiation range it achieves. Please refer to FIG. 4, which shows the second antenna 21 in the case of the common dielectric constant of the printed circuit board 2 of 4.2 and the electrical length of about 60mm, the comparison diagram of the reflection coefficient and the frequency point of the second antenna 21 can be seen The reflection coefficient in the range of 2.4GHz-2.5GHz is less than -10dB, which can fully meet the frequency domain and bandwidth requirements of 2.4G WIFI, and the second antenna 21 of this structure occupies a considerable area of the printed circuit board 2 Small, it only occupies an area of 0.00009㎡ under 2.4G WIFI frequency. The higher the frequency of the antenna, the smaller the area it occupies, which greatly releases the headroom.

In some embodiments, in order to connect the printed circuit board 2 through the feeding member 212, the feeding member 212 can be arranged on the side of the printed circuit board 2, and connect the gap member 211 and the grounding member respectively arranged on the upper and lower surfaces of the printed circuit board 2 213. The printed circuit board 2 has a boundary, and the feed member 212 can connect the gap member 211 and the grounding member 213 respectively provided on the upper and lower surfaces from the boundary of the printed circuit board 2. The through hole can bypass other components from the side edge of the printed circuit board 2 to connect the upper and lower surfaces. In addition, notches can also be provided at corresponding positions on the side edges of the printed circuit board 2 , so that the feeding member 212 can be routed through the notches to connect the gap member 211 on the upper and lower surfaces with the grounding member 213 . It is worth mentioning that the way of routing the feed member 212 may be to form a metal layer on the gap by means of electroplating or the like, and use the formed metal layer as the feed member 212 .

In some embodiments, in order to connect the printed circuit board 2 through the feed member 212, a through hole through the upper and lower surfaces may also be provided on the printed circuit board 2, the feed member 212 passes through the through hole, and the connection is respectively arranged on the printed circuit board. 2. The gap member 211 and the ground member 213 on the upper and lower surfaces. The feed member 212 is set on the side edge of the printed circuit board 2, and the requirement for the size of the printed circuit board 2 is relatively high. The component 212 can only be arranged in the corner area of the printed circuit board 2, or on both sides of the short side; in addition, a through hole penetrating the upper and lower surfaces can be arranged on the printed circuit board 2, and a feeder can be arranged in the through hole. The electrical components 212 are used to connect the upper and lower surfaces. This arrangement has less requirements on the size of the printed circuit board 2 , and only needs to have a space for opening through holes.

In some embodiments, the vias include metal vias, and the feed member 212 is a hole wall of the metal vias. The metal through hole is to cover the inner wall of the hole with metal through electroplating and other processes, so as to realize the conduction; the feed member 212 in this embodiment can be realized by the hole wall of the metal through hole.

In some embodiments, the slot member 211 may include two microstrip lines arranged at intervals. The space between the microstrip lines forms the slot in the slot antenna, which is the radiation position of the slot antenna.

In some embodiments, the type of the second antenna 21 includes a single-frequency antenna, and/or an antenna whose initial area is greater than or equal to a preset threshold. Since the second antenna 21 arranged on the printed circuit board 2 can be arranged in a different position and type than the first antenna 11 arranged in the antenna arrangement area 1, in order to increase the antenna arrangement area 1 as much as possible The installation space of the antenna can be increased, and the distance between the first antennas 11 can be increased, so that the antenna with a larger initial area can be arranged on the printed circuit board 2 as the second antenna 21 . Wherein, the initial area refers to the size that the antenna should have when it is arranged in the antenna arrangement area 1 , and generally some low-frequency antennas have larger areas. The single-frequency antenna refers to an antenna that only works in one frequency band; of course, in this embodiment, the second antenna 21 may also be a multi-frequency antenna.

In some embodiments, in order to further reduce the coupling between the antennas, the second antenna 21 is located at a corner area of the printed circuit board 2 . The second antenna 21 can be arranged at the corner area of the printed circuit board 2 , and it is relatively easy to meet the requirement of the clearance area where the second antenna 21 is arranged.

This embodiment provides a terminal device. The terminal device includes a stacked panel, a middle frame, and a backplane; at least one of the panel, the middle frame, and the backplane is provided with at least one set of first antennas 11; the terminal device It also includes a printed circuit board 2 that is fixedly connected to the middle frame or the backplane, wherein: the printed circuit board 2 is provided with at least one group of second antennas 21, and the feed points and ground points of the second antennas 21 are all provided on the printed circuit board. On the board 2, in some implementations, in addition to being arranged on the panel, middle frame and backplane, the antenna can also be arranged on the printed circuit board 2 in the terminal, so that in the limited internal space of the terminal, the The layout position of the antenna is improved, and the layout interval between the antennas can be increased under the same number of antennas and functions, thereby reducing the coupling of the antennas and improving the radiation quality of the antennas.

It can be seen that those skilled in the art should understand that all or some of the steps in the methods disclosed above, the functional modules/units in the system and the device can be implemented as software (the computer program code executable by the computing device can be used to realize ), firmware, hardware, and appropriate combinations thereof. In a hardware implementation, the division between functional modules/units mentioned in the above description does not necessarily correspond to the division of physical components; for example, one physical component may have multiple functions, or one function or step may be composed of several physical components. Components cooperate to execute. Some or all of the physical components may be implemented as software executed by a processor, such as a central processing unit, digital signal processor, or microprocessor, or as hardware, or as an integrated circuit, such as an application-specific integrated circuit .

In addition, as is well known to those of ordinary skill in the art, communication media typically embodies computer readable instructions, data structures, computer program modules, or other data in a modulated data signal such as a carrier wave or other transport mechanism, and may include any information delivery medium. Therefore, the present disclosure is not limited to any specific combination of hardware and software.

The above content is a further detailed description of the embodiments of the present disclosure in combination with the implementation modes, and it cannot be deemed that the implementation of the present disclosure is limited to these descriptions. For those of ordinary skill in the technical field to which the present disclosure belongs, without departing from the concept of the present disclosure, some simple deductions or substitutions can be made, which should be deemed to belong to the protection scope of the present disclosure.

Claims

A terminal device, comprising a laminated panel, a middle frame, and a backplane; at least one of the panel, the middle frame, and the backplane is provided with at least one set of first antennas; the terminal device It also includes a printed circuit board fixedly connected to the middle frame or the backplane, wherein,

At least one group of second antennas is arranged on the printed circuit board, and the feeding point and the grounding point of the second antennas are both arranged on the printed circuit board.
The terminal device according to claim 1, wherein each part of the metal member of the second antenna is respectively arranged on the upper and lower surfaces of the printed circuit board.
The terminal device according to claim 2, wherein the second antenna includes a slot antenna, the metal member of the slot antenna includes a slot member, a feeding member and a grounding member, and the slot member is arranged on the printed circuit board The upper surface of the slot antenna is used as the radiation point of the second antenna; the grounding member of the slot antenna is arranged on the lower surface of the printed circuit board as the grounding point of the second antenna; the feeding member is connected to the The slot member and the ground member serve as feed points for the second antenna.
The terminal device according to claim 3, wherein the power feeding member is disposed on a side of the printed circuit board, and connects the gap member and the grounding member respectively disposed on the upper and lower surfaces of the printed circuit board.
The terminal device according to claim 3, wherein the printed circuit board is provided with through holes penetrating the upper and lower surfaces, the feeding member passes through the through holes, and is connected to the upper and lower surfaces of the printed circuit board respectively. The gap member and the ground member.
The terminal device according to claim 5, wherein the through hole comprises a metal through hole, and the feeding member is a hole wall of the metal through hole.
The terminal device according to claim 3, wherein the slot member comprises two microstrip lines provided with an interval.
The terminal device according to any one of claims 1-7, wherein the type of the second antenna includes a single-frequency antenna, and/or an antenna whose initial area is greater than or equal to a preset threshold.
The terminal device according to any one of claims 1-7, wherein the second antenna is located at a corner area of the printed circuit board.
The terminal device according to any one of claims 1-7, wherein the arrangement of the first antenna includes at least one of the following: flexible circuit board FPC, laser direct structuring LDS, direct printing PDS, and metal steel sheet .