Terminal device

Abstract

The present disclosure relates to a mobile device comprising a first antenna structure, the first antenna structure comprising a first radiation section and a second radiation section, and a radiation structure disposed on a circuit board, the radiation structure being configured to partially serve as a radiator of the antenna structure, the first radiation section and the second radiation section being connected through the radiation structure. According to the technical scheme, the purpose of increasing the radiation length of the antenna while ensuring the performance of the antenna in a limited space can be achieved, the antenna structure is less affected by installation environments such as space resources and field intensity, and the design flexibility is higher.

Description

Technical Field

[0001] The present disclosure relates to the technical field of antennas, and particularly to a terminal device with an antenna. Background Art

[0002] With the development of communication technologies, the number of frequency bands integrated in terminal devices represented by mobile phones is increasing. The more antennas are used, the worse the stacking environment becomes. With the pursuit of narrow bezels for mobile phones, the internal space resources of the terminal are tense. When there is no room to give way in the space adjacent to surrounding antennas, it is necessary to increase the radiation length of the antenna while ensuring the antenna performance within a limited space. Related technologies mostly adjust the radiation length by means of components or lengthening the traces. However, these methods are easily affected by space resources and installation environments, and the design flexibility is poor. Summary of the Invention

[0003] To overcome the problems in the related technologies, the present disclosure provides a terminal device.

[0004] According to an embodiment of the present disclosure, a terminal device is provided, including a first antenna structure. The first antenna structure includes a first radiation section and a second radiation section, and a radiation structure disposed on a circuit board. The radiation structure is configured to partially serve as a radiator of the first antenna structure, and the first radiation section and the second radiation section are connected through the radiation structure.

[0005] Optionally, the radiation structure is a metal trace disposed on the circuit board, and a feeding position of the first antenna structure is disposed at the metal trace.

[0006] Optionally, the first antenna structure further includes a metal spring piece disposed on the circuit board. The metal spring piece presses on one of the first radiation section and the second radiation section. A first end of the metal trace is connected to the metal spring piece, and a second end of the metal trace is connected to the other of the first radiation section and the second radiation section.

[0007] Optionally, the first antenna structure is disposed at a bezel of the terminal device.

[0008] Optionally, the first radiation section extends along a top bezel or a bottom bezel direction of the terminal device, and the second radiation section extends along a side bezel direction of the terminal device.

[0009] Optionally, the radiation structure is disposed at a corner of the circuit board close to the first radiation section and the second radiation section.

[0010] Optionally, the terminal device further includes a second antenna structure. The first radiation section and the second radiation section are spaced apart to form an installation gap at a corner of the terminal device frame, and the second antenna structure is disposed in the installation gap.

[0011] Optionally, the first antenna structure and the second antenna structure are configured to have different operating frequency bands. The circuit board includes a first board surface and a second board surface facing each other. The first board surface is provided with a first feeding unit, and the first antenna structure is connected to the first feeding unit. The second board surface is provided with a second feeding unit, and the second antenna structure is connected to the second feeding unit.

[0012] Optionally, a first isolation circuit is provided between the first antenna structure and the first feeding unit; and / or a second isolation circuit is provided between the second antenna structure and the second feeding unit, wherein the first isolation circuit and the second isolation circuit are used to decouple the first antenna structure and the second antenna structure.

[0013] Optionally, the first isolation circuit and the second isolation circuit are configured as matching tuning circuits.

[0014] The technical solution provided by the embodiment of the present disclosure may include the following beneficial effects: In the terminal device provided by the present disclosure, the first radiation section and the second radiation section are connected through a radiation structure disposed on the circuit board to form a first antenna structure. That is to say, the radiation structure on the circuit board is partially used as the radiator of the first antenna structure. Since no extra space of the mobile phone frame is occupied, the purpose of ensuring the antenna performance while increasing the antenna radiation length in a limited space can be achieved. Or, in the case of achieving the same antenna radiation length, less space is occupied. And the radiation structure has no limitation on the specific position set on the circuit board. Therefore, compared with the way of adjusting radiation by components or lengthening the wiring, it is less affected by the installation environment such as space resources and field strength size, and the design flexibility is higher.

[0015] It should be understood that the above general description and the following detailed description are only exemplary and explanatory, and cannot limit the present disclosure. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The accompanying drawings herein are incorporated into the specification and constitute a part of this specification, showing embodiments consistent with the present disclosure and used together with the specification to explain the principles of the present disclosure.

[0017] Figure 1 is a schematic diagram of the architecture of an antenna in a terminal device shown according to an exemplary embodiment.

[0018] Figure 2 is Figure 1Schematic diagram of the partial structure of the middle terminal device.

[0019] Figure 3 It is a schematic diagram of the principle of the antenna structure of the related technology.

[0020] Figure 4 and Figure 5 It is a feeding diagram of an antenna structure shown according to an exemplary embodiment.

[0021] Figure 6 and Figure 7 It is a performance simulation diagram of an antenna structure shown according to an exemplary embodiment.

[0022] Figure 8 It is an architecture diagram of an antenna in another terminal device shown according to an exemplary embodiment.

[0023] Figure 9 is Figure 8 Schematic diagram of the partial structure of the middle terminal device.

[0024] Figure 10 It is a schematic diagram of the antenna isolation circuit of the first antenna structure.

[0025] Figure 11 It is a schematic diagram of the antenna isolation circuit of the second antenna structure.

[0026] Figure 12 It is a performance simulation diagram of another antenna structure shown according to an exemplary embodiment.

[0027] Description of reference numerals

[0028] 1 - First antenna structure, 11 - First radiation section, 111 - Connection part, 12 - Second radiation section, 2 - Circuit board, 21 - Radiation structure, 22 - Metal shrapnel, 23 - First feeding unit, 24 - First isolation circuit, 25 - Second feeding unit, 26 - Second isolation circuit, 261 - Capacitor, 262 - Inductor, 3 - Second antenna structure. Detailed implementation manners

[0029] Here, the exemplary embodiments will be described in detail, and the examples are shown in the drawings. When the following description refers to the drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. The implementation manners described in the following exemplary embodiments do not represent all implementation manners consistent with the present disclosure. Instead, they are merely examples of devices and methods consistent with some aspects of the present disclosure as detailed in the appended claims.

[0030] Unless otherwise specified, the orientation terms such as "upper", "lower", "left", and "right" are defined according to the directions indicated in the corresponding drawings, while "inner" and "outer" refer to the inside and outside of the contour of the corresponding component itself. In addition, the terms "first", "second", etc. used in this disclosure are used to distinguish one element from another, and do not have sequentiality and importance.

[0031] It should be noted that all actions of obtaining signals, information, or data in this disclosure are carried out on the premise of complying with the corresponding data protection regulations and policies of the country where it is located and with the authorization given by the owner of the corresponding device.

[0032] As Figure 1 and Figure 2 shown, this disclosure exemplarily provides a terminal device, which includes but is not limited to portable mobile devices such as mobile phones and tablet computers, and non-mobile devices such as computers. Specifically, the terminal device provided in this disclosure includes a first antenna structure 1, the first antenna structure 1 includes a first radiation section 11 and a second radiation section 12, and a radiation structure 21 disposed on a circuit board 2, and the radiation structure 21 is configured to partially serve as a radiator of the antenna structure, and the first radiation section 11 and the second radiation section 12 are connected through the radiation structure 21.

[0033] Among them, the first antenna structure 1 includes a first radiation section 11 and a second radiation section 12. The first radiation section 11 and the second radiation section 12 can be regarded as a split structure. For example, it can be formed by truncating an original integrated antenna structure. For example, in Figure 3 the integrated T-shaped antenna structure shown. By truncating a part between the first radiation section 11 and the second radiation section 12, it is possible to make the first radiation section 11 and the second radiation section 12 approach each other by a certain distance. At the same time, the radiation structure 21 disposed on the circuit board 2 partially serves as a radiator of the antenna structure, that is, the split first radiation section 11 and the second radiation section 12 are connected through the radiation structure 21 to re-form a complete antenna structure. In this way, even if the distance between the first radiation section 11 and the second radiation section 12 is shortened due to their mutual approach, the radiation length and antenna performance can still be ensured by the radiation structure 21 participating in antenna radiation.

[0034] It should be noted that the so-called radiation structure 21 is different from the components with tuning functions in the related art. Although both the radiation structure 21 and the components with tuning functions are disposed on the circuit board 2, the difference is that, on the one hand, the components with tuning functions themselves are not used as part of the radiator of the antenna structure, and on the other hand, the components with tuning functions are greatly affected by the installation environment such as field strength, so there are relatively high requirements for their specific installation positions.

[0035] The radiation structure 21 is configured to partially serve as a radiator of the first antenna structure 1, that is, part of the metal traces in the circuit board 2 are used as the radiator of the first antenna structure 1. In terms of the architecture principle, the first antenna structure 1 of the present disclosure includes a first radiation section 11 and a second radiation section 12, and the first radiation section 11 and the second radiation section 12 are connected by the radiation structure 21 on the circuit board 2, so that originally, such as Figure 3 The T-shaped antenna in it is formed into two IFA (Inverted-F Antenna) antennas equivalent. Here, the equivalence means that in terms of the structural form, it still belongs to the T-shaped antenna, while in terms of the working principle, it is equivalent to two IFA antennas. It can be further understood that through the radiation structure 21, the radiation branches of the first antenna structure 1 are elongated, which is equivalent to the change in the distance from the two IFA antennas fed to the ground. Since the feeding is at the trace on the circuit board 2 that participates in the radiation of the first antenna structure 1, the change in the feeding position affects the lengths of the two IFA antennas on both sides, thereby changing the radiation length of the antenna.

[0036] Through the above construction of the first antenna structure 1, the performance of the low band (LB) and the mid / high band (MHB) of the antenna can be balanced. Taking the side frame antenna of N11A as an example, after truncation, the first radiation section 11 is indented upward by 1 mm, as Figure 4 And Figure 5 Shown, by comparing the initial turns of the open end and the short end respectively, it is found that although the structural length of the improved first antenna structure 1 is shortened, its radiation length is still longer than that of the original (ori) T-shaped antenna, thus realizing the coverage of the LMHB frequency band under the T antenna design. Further, as Figure 6 And Figure 7 Shown, among them, Figure 6 Specifically, it is the echo loss simulation diagram, Figure 8 Specifically, it is the efficiency simulation diagram. The improved first antenna structure 1 has balanced performance in the covered LMHB frequency band, especially in the mid / high frequency band, and the overall efficiency is also relatively flat, having a better radiation effect.

[0037] The technical solution provided by the embodiment of the present disclosure may include the following beneficial effects: The terminal device provided by the present disclosure connects the first radiation section 11 and the second radiation section 12 through the radiation structure 21 provided on the circuit board 2 to form the first antenna structure, that is, the radiation structure 21 on the circuit board 2 is used to partially serve as the radiator of the first antenna structure 1. Since it does not occupy extra mobile phone frame space, the purpose of ensuring the antenna performance while increasing the antenna radiation length in a limited space can be achieved, or in other words, it occupies less space when achieving the same antenna radiation length.

[0038] Tuning is performed for positions where the required conditional field strength for lengthening the radiation length by components is relatively strong, and different frequency bands are affected differently. The matching topology trace lengthening design is single, only appears at the feeding point, and is also easily affected by a specific space. In contrast, in the present disclosure, the radiation structure 21 on the circuit board 2 is formed as a part of the first antenna structure 1. Among them, the position of the radiation structure 21 on the circuit board 2 is not limited. Therefore, compared with the methods of adjusting radiation by components or lengthening traces, it is less affected by installation environments such as space resources and field strength, and the design flexibility is higher.

[0039] The circuit board 2 mentioned in the present disclosure may be, for example, a Printed Circuit Board (PCB). In some embodiments, as Figure 2 shown, the radiation structure 21 is a metal trace provided on the circuit board 2, and the feeding position of the first antenna structure 1 is at the metal trace. The metal trace may be formed by using some original traces of the circuit board 2, or may be an additional metal trace provided in the idle area of the circuit board 2. The present disclosure does not limit this. The metal trace is provided on the circuit board 2, and the feeding position is provided at the metal trace. In this way, the distance from the first radiation section 11 and the second radiation section 12 to the ground is increased, thereby increasing the radiation lengths of the first radiation section 11 and the second radiation section 12, and ultimately achieving an increase in the overall radiation length of the first antenna structure 1, so as to achieve the purpose of improving performance.

[0040] Furthermore, as Figure 1 shown, the first antenna structure 1 further includes a metal spring piece 22 provided on the circuit board 2. The metal spring piece 22 presses on one of the first radiation section 11 and the second radiation section 12. The first end of the metal trace is connected to the metal spring piece 22, and the second end of the metal trace is connected to the other of the first radiation section 11 and the second radiation section 12. Utilizing the elastic force of the metal spring piece is beneficial to ensuring a reliable connection between the radiation section and the circuit board 2. Among them, Figure 1 it is shown that the metal spring piece presses on the first radiation section 11. The first end of the metal trace is connected to the metal spring piece, and the second section is connected to the second radiation section 12. To facilitate connection with the metal trace and save lateral space, the first radiation section 11 and the second radiation section 12 may be provided with connecting portions 111 extending convexly towards the circuit board 2, and the metal trace is connected to the connecting portion 111. A feeding port is provided on the connecting portion 111, and the feeding port is connected to the feeding unit of the terminal device through the metal trace.

[0041] In some embodiments, the first antenna structure 1 may be configured at the border of the terminal device, that is, the first antenna structure 1 is a border antenna. Moreover, the first antenna structure 1 provided in the present disclosure is particularly suitable for terminal devices with a narrow border and limited space because it can achieve excellent antenna performance under a narrow border.

[0042] In some other embodiments, the first antenna structure 1 may be further configured at the corner of the terminal device frame (i.e., the R corner of the terminal device), or rather, the first radiation section 11 and the second radiation section 12 are respectively located at the positions of two adjacent frames of the terminal. Specifically, the first radiation section 11 extends along the top frame or the bottom frame direction of the terminal device. In Figure 1 and Figure 9 the illustrated embodiment, the first radiation section 11 extends along the top frame direction of the terminal device, and the second radiation section 12 extends along the side frame direction of the terminal device. The narrow frame has a more obvious impact on the space resources at the corner of the terminal device. However, with the first antenna structure 1 provided by the present disclosure, it is beneficial to increase the antenna radiation length even at the corner of the terminal device.

[0043] In the foregoing manner where the first radiation section 11 and the second radiation section 12 are respectively located at the positions of two adjacent frames of the terminal, further, the radiation structure 21 may be disposed at the corner of the circuit board 2 close to the first radiation section 11 and the second radiation section 12. In this way, the distance between the radiation structure 21 and the first radiation section 11 and the second radiation section 12 can be made relatively close, which is beneficial to saving the routing length of the radiation structure 21 while meeting the required radiation length and reducing the occupation of the design space of the circuit board 2.

[0044] Taking a mobile phone as an example, setting the N77 band antenna at the corner of the top frame has a smaller impact on the game touch area and has an advantage in gaming. In the foregoing embodiment where the first antenna structure 1 is disposed at the corner of the top frame of the terminal device, for example, the first antenna structure adopts a T-shaped antenna covering the LHMB band, resulting in the occupation of the design space of some important bands such as N77.

[0045] Considering the above technical problems, as Figure 8 and Figure 9 shown, the terminal device provided by the present disclosure may further include a second antenna structure 3. Taking the first antenna structure 1 as the aforementioned dual IFA type antenna equivalent and the second antenna structure 3 as the N77 band antenna as an example. The first radiation section 11 and the second radiation section 12 of the first antenna structure 1 are spaced apart to form an installation gap at the corner of the terminal device frame, and the second antenna structure 3 is disposed at this installation gap, so as to realize the multiplexing of the space at the corner of the terminal device. In this way, it is possible to realize giving up enough corner space to install the second antenna structure 3 while ensuring the performance of the first antenna structure 1. As Figure 12 shown in the antenna efficiency simulation diagram, the average value of the N78 band antenna is close to -5 dB, which has little impact on the low-frequency efficiency and ensures the medium and high-frequency efficiency.

[0046] In some embodiments, the circuit board 2 includes a first board surface and a second board surface facing away from each other. The first board surface is provided with a first feeding unit 23, and the second board surface is provided with a second feeding unit 25. That is to say, in these embodiments, the circuit board 2 adopts a double-sided PCB design, that is, circuits are provided on both board surfaces of the PCB. That is, the first board surface is the BOTTOM surface of the PCB, and the second board surface is the TOP surface of the PCB. Among them, the first antenna structure 1 is connected to the first feeding unit 23, and the second antenna structure 3 is connected to the second feeding unit 25. That is, by using the double-sided characteristics of the PCB, while realizing corner space multiplexing, the first antenna structure 1 and the second antenna structure 3 are isolated from each other, reducing the radiation interference between them.

[0047] To further solve the problem of the isolation degree between the first antenna structure 1 and the second antenna structure 2, as Figure 10 and Figure 11 shown, a first isolation circuit 24 is provided between the first antenna structure 1 and the first feeding unit 23; and / or a second isolation circuit 26 is provided between the second antenna structure 3 and the second feeding unit 25. Among them, the first isolation circuit 24 and the second isolation circuit 26 are used to decouple the first antenna structure 1 and the second antenna structure 3. It should be noted that the decoupling here refers to the opposite process of coupling, aiming to avoid the interference of signals between the first antenna structure 1 and the second antenna structure 2. Optionally, the first isolation circuit 24 and the second isolation circuit 26 are configured as matching tuning circuits. That is, the frequency band is isolated by means of circuit matching. Its principle can be understood as series-connected matching tuning circuits between the antenna structure and the feeding point, and the resonant frequency in the matching tuning circuit is adjusted so that the decoupled signal frequency band drops as soon as possible to achieve the isolation of the signal frequency band. According to the different signal frequency bands to be decoupled, the isolation circuit may include a capacitor 261, or an isolation circuit in which the capacitor 261 is connected in parallel with an inductor 262.

[0048] Those skilled in the art will readily think of other embodiments of the present disclosure after considering the specification and practicing the present disclosure. The present disclosure aims to cover any variations, uses, or adaptations of the present disclosure that follow the general principles of the present disclosure and include common general knowledge or conventional technical means in the technical field not disclosed in the present disclosure. The specification and the embodiments are only regarded as exemplary, and the true scope and spirit of the present disclosure are pointed out by the following claims.

[0049] It should be understood that the present disclosure is not limited to the exact structures described above and shown in the drawings, and various modifications and changes can be made without departing from its scope. The scope of the present disclosure is only limited by the appended claims.

Claims

1. A terminal device, characterized in that, it includes a first antenna structure, the first antenna structure includes a first radiation section and a second radiation section, and a radiation structure disposed on a circuit board, the radiation structure being configured to partially serve as a radiator of the first antenna structure, and the first radiation section and the second radiation section are connected through the radiation structure.

2. The terminal device according to claim 1, characterized in that, the radiation structure is a metal trace disposed on the circuit board, and a feeding position of the first antenna structure is disposed at the metal trace.

3. The terminal device according to claim 1, characterized in that, the first antenna structure further includes a metal shrapnel disposed on the circuit board, the metal shrapnel being pressed against one of the first radiation section and the second radiation section, a first end of the metal trace is connected to the metal shrapnel, and a second end of the metal trace is connected to the other of the first radiation section and the second radiation section.

4. The terminal device according to any one of claims 1 to 3, characterized in that, the first antenna structure is disposed at a frame of the terminal device.

5. The terminal device according to claim 4, characterized in that, the first radiation section extends along a top frame or a bottom frame direction of the terminal device, and the second radiation section extends along a side frame direction of the terminal device.

6. The terminal device according to claim 5, characterized in that, the radiation structure is disposed at a corner of the circuit board close to the first radiation section and the second radiation section.

7. The terminal device according to claim 5, characterized in that, it further includes a second antenna structure, the first radiation section and the second radiation section are spaced apart to form an installation gap at a corner of the terminal device frame, and the second antenna structure is disposed at the installation gap.

8. The terminal device according to claim 7, characterized in that, the first antenna structure and the second antenna structure are configured to have different operating frequency bands, the circuit board includes a first board surface and a second board surface facing each other, the first board surface is provided with a first feeding unit, the first antenna structure is connected to the first feeding unit, the second board surface is provided with a second feeding unit, and the second antenna structure is connected to the second feeding unit.

9. The terminal device according to claim 8, characterized in that, a first isolation circuit is disposed between the first antenna structure and the first feeding unit; and / or a second isolation circuit is disposed between the second antenna structure and the second feeding unit, wherein the first isolation circuit and the second isolation circuit are used to decouple the first antenna structure and the second antenna structure.

10. The terminal device according to claim 9, characterized in that, the first isolation circuit and the second isolation circuit are configured as matching tuning circuits.

Images