An antenna assembly and a terminal device

Abstract

The application provides an antenna assembly and a terminal device, wherein the antenna assembly comprises a plastic support, the plastic support comprising a first surface and a second surface opposite to each other; a feeding point arranged on the plastic support; a grounding point arranged on the plastic support; a first radiator arranged on the first surface, one end of the first radiator being connected with the feeding point, and the other end of the first radiator being connected with the grounding point; and a second radiator arranged on the second surface, one end of the second radiator being connected with the feeding point. Compared with the related art, the application has the advantages of a double-surface structure design, increased overall radiation area, effectively improved overall radiation efficiency of the antenna assembly, and maintained high performance of the antenna assembly in a poor antenna clearance environment.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of antennas, and in particular to an antenna assembly and a terminal device. BACKGROUND

[0002] With the rapid update and iteration of mobile communication technology, people have higher requirements for the appearance and functions of intelligent terminal devices, mainly focusing on functional diversification and device miniaturization. At the same time, due to the sharp increase in antenna assemblies, the integration of internal components of terminal devices is also increasing, which leads to smaller antenna clearance, causing the radiation efficiency of the antenna assembly to decrease and affecting the performance of the antenna assembly. SUMMARY

[0003] The present application aims to at least partially solve one of the technical problems in the related art.

[0004] To this end, the present application aims to provide an antenna assembly and a terminal device.

[0005] To achieve the above-mentioned purpose, the first aspect of the present application provides an antenna assembly, comprising: a plastic support, the plastic support comprising: a first face and a second face opposite to each other; a first radiator, the first radiator being arranged on the first face, one end of the first radiator being provided with a first feeding point, the other end of the first radiator being provided with a grounding point; a second radiator, the second radiator being arranged on the second face, one end of the second radiator being provided with a second feeding point.

[0006] The antenna assembly further comprises: a circuit board, the circuit board being located on the second face side of the plastic support, the first feeding point, the second feeding point and the grounding point being electrically connected to the circuit board respectively; a shielding cover, the shielding cover being arranged on the circuit board, the shielding cover being located between the circuit board and the second face, the first feeding point, the grounding point and the shielding cover not overlapping in the orthographic projection on the plastic support respectively, the second feeding point and the shielding cover not overlapping in the orthographic projection on the plastic support respectively, at least part of the first radiator and the shielding cover not overlapping in the orthographic projection on the plastic support respectively, the second radiator and the shielding cover not overlapping in the orthographic projection on the plastic support respectively.

[0007] The first feeding point and the second feeding point overlap in the orthographic projection on the plastic support respectively, the plastic support is provided with a connecting hole, and the first feeding point and the second feeding point are connected through the connecting hole.

[0008] The first surface is provided with a glue point region, the first radiator is provided with a first gap at one end close to the first feeding point, and at least part of the second radiator overlaps at least part of the first gap in orthographic projection on the plastic support, respectively.

[0009] The second radiator comprises: a first part, the first part overlaps at least part of the first gap in orthographic projection on the plastic support, respectively; and a second part, one end of the second part is connected with the first part, and the other end of the second part is connected with the second feeding point.

[0010] The first radiator comprises: a U-shaped radiation arm, at least part of the U-shaped radiation arm and the shielding cover do not overlap in orthographic projection on the plastic support, respectively, one end of the U-shaped radiation arm is connected with the grounding point; and a third part, the third part and the shielding cover do not overlap in orthographic projection on the plastic support, respectively, one end of the third part is connected with the other end of the U-shaped radiation arm, the other end of the third part is connected with the first feeding point, the first feeding point is close to the grounding point, and the first gap is arranged at one end of the third part away from the grounding point.

[0011] The U-shaped radiation arm comprises: a fourth part, one end of the fourth part is connected with the grounding point; a fifth part, the fifth part is located at one end of the shielding cover away from the third part, at least part of the fifth part and the shielding cover do not overlap in orthographic projection on the plastic support, respectively, one end of the fifth part is connected with the other end of the fourth part; and a sixth part, one end of the sixth part is connected with the other end of the fifth part, and the other end of the sixth part is connected with one end of the third part close to the first gap.

[0012] The width of the fifth part is greater than the width of the fourth part and the sixth part.

[0013] The antenna assembly further comprises: a fixing hole arranged on the circuit board, and a third gap arranged on the third part, the third gap makes the third part and the fixing hole not overlap in orthographic projection on the plastic support, respectively.

[0014] A second gap is arranged on the second part, the second gap makes the second part and the fixing hole not overlap in orthographic projection on the plastic support, respectively.

[0015] The second aspect of the application provides a terminal device, comprising: the antenna assembly of the first aspect of the application.

[0016] Compared with the related art, the application has the advantages that the first radiating body and the second radiating body are arranged on opposite surfaces of the plastic support, thereby forming a double-sided structure design, increasing the overall radiation area, effectively improving the overall radiation efficiency of the antenna assembly, and enabling the antenna assembly to maintain high performance in a poor antenna clearance environment.

[0017] Additional aspects and advantages of the application will be set forth in part in the description which follows, and in part will become apparent to those skilled in the art upon examination of the following and / or can be learned by practice of the application. BRIEF DESCRIPTION OF DRAWINGS

[0018] The above and / or additional aspects and advantages of the application will become apparent and be readily appreciated from the following description, including the appended drawings and claims.

[0019] Figure 1 is a structural schematic diagram of a terminal device according to an embodiment of the application;

[0020] Figure 2 is a structural schematic diagram of a terminal device according to an embodiment of the application;

[0021] Figure 3 is a rear view schematic diagram of an antenna assembly according to an embodiment of the application;

[0022] Figure 4 is a front view schematic diagram of an antenna assembly according to an embodiment of the application;

[0023] Figure 5 is a curve diagram of radiation efficiency comparison according to an embodiment of the application;

[0024] Figure 6 is a schematic diagram of current simulation according to an embodiment of the application;

[0025] Figure 7 is a schematic diagram of current simulation according to an embodiment of the application;

[0026] Figure 8 is a schematic diagram of current simulation according to an embodiment of the application;

[0027] As shown in the figure: 1, first part, 2, second part, 3, third part, 4, fourth part, 5, fifth part, 6, sixth part, 7, feed point, 8, grounding point, 9, first notch, 10, second notch, 11, third notch, 12, circuit board, 13, shielding cover, 14, fixing hole, 15, second feed point. DETAILED DESCRIPTION

[0028] The embodiments of this application are described in detail below, examples of which are illustrated in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this application, and should not be construed as limiting this application. Rather, the embodiments of this application include all variations, modifications, and equivalents falling within the spirit and scope of the appended claims.

[0029] In order to expand the supported frequency bands, terminal devices usually add an LDS (Laser Direct Structuring) antenna on a plastic bracket in addition to the metal frame antenna. This solution uses a specific antenna pattern to deposit on the plastic bracket, so that the terminal device can support more frequency bands. However, the environment of LDS antennas is usually more harsh.

[0030] like Figure 1 As shown in the relevant embodiments of this utility model, the terminal device includes a circuit board 12, a plastic bracket and a first radiator. The plastic bracket is connected to the circuit board 12. One end of the first radiator is provided with a first power supply point 7 and the other end of the first radiator is provided with a grounding point 8. The first radiator is located on the side of the plastic bracket away from the circuit board 12. Both the first power supply point 7 and the grounding point 8 are electrically connected to the circuit board 12.

[0031] The plastic bracket has an adhesive area on its side away from the circuit board 12. Adhesive is applied to the adhesive area to connect the plastic bracket to the terminal device housing. However, due to the high integration and small space of the terminal device, the first radiator partially covers the adhesive area when it is placed on the plastic bracket, causing the adhesive to stick to the first radiator. This makes the first radiator easy to be damaged when the terminal device is disassembled.

[0032] Therefore, a first notch 9 is provided on the first radiator to avoid the glue dispensing area, thereby preventing the glue from damaging the first radiator. However, the problem that follows is that the radiation area of ​​the first radiator is reduced due to the setting of the first notch 9, which leads to a decrease in the radiation efficiency of the first radiator. According to experiments, the radiation efficiency of the first radiator is reduced by about 0.5 dB.

[0033] Meanwhile, when the antenna clearance environment is poor, the radiation efficiency brought by the single-sided design of the LDS antenna is often insufficient.

[0034] To solve the above technical problems, such as Figures 2 to 4As shown in the embodiment of this application, an antenna assembly is proposed, including a plastic bracket, a first radiator and a second radiator. The plastic bracket includes a first surface and a second surface in opposite positions. The first radiator is disposed on the first surface, with a first feed point 7 at one end and a ground point 8 at the other end. The second radiator is disposed on the second surface, with a second feed point 15 at one end.

[0035] Understandably, the first and second radiators are respectively set on opposite sides of the plastic bracket, thus forming a double-sided structural design, which increases the overall radiation area and effectively improves the overall radiation efficiency of the antenna assembly, enabling the antenna assembly to maintain high performance even in poor antenna clearance environments.

[0036] In some embodiments, both the first radiator and the second radiator are LDS antennas, which operate in the frequency band of 0.45 GHz to 6 GHz, and are mounted on a plastic support by deposition.

[0037] like Figures 2 to 4 As shown, in some embodiments, the antenna assembly further includes a circuit board 12 and a shielding cover 13. The circuit board 12 is connected to a plastic bracket and is located on the second side of the plastic bracket. The first feed point 7, the second feed point 15, and the ground point 8 are electrically connected to the circuit board 12. The shielding cover 13 is disposed on the circuit board 12 and is located between the circuit board 12 and the second side. The orthographic projections of the first feed point 7, the ground point 8, and the shielding cover 13 on the plastic bracket do not overlap. The orthographic projections of the second feed point 15 and the shielding cover 13 on the plastic bracket do not overlap. The orthographic projections of at least a portion of the first radiator and the shielding cover 13 on the plastic bracket do not overlap. The orthographic projections of the second radiator and the shielding cover 13 on the plastic bracket do not overlap.

[0038] It is understandable that at least a portion of the first feed point 7, the second feed point 15, the grounding point 8, the second radiator, and the first radiator avoid the shielding cover 13, so that the current strong point of the antenna assembly is located in a region with a better clearance environment, thereby increasing the effective radiation area of ​​the antenna assembly and improving the overall radiation efficiency of the antenna assembly.

[0039] It should be noted that the orthographic projections of the first radiator and the shield 13 on the plastic bracket can be set to not overlap, or the orthographic projections of the first radiator and the shield 13 on the plastic bracket can be set to not overlap.

[0040] In some embodiments, the orthographic projections of the first power supply point 7 and the second power supply point 15 on the plastic bracket overlap, and the plastic bracket is provided with a connection hole, through which the first power supply point 7 and the second power supply point 15 are connected.

[0041] It can be understood that the first radiating body and the second radiating body form an integral structure through the connection of the first feeding point 7 and the second feeding point 15, which not only facilitates the signal transmission of the circuit board 12, the first radiating body and the second radiating body, but also ensures the radiation efficiency of the antenna assembly.

[0042] In some embodiments, the first surface is provided with a dispensing area, the first radiating body is provided with a first gap 9 of the avoiding structure member at one end close to the first feeding point 7, and at least part of the second radiating body overlaps at least part of the first gap 9 in the orthographic projection on the plastic support, respectively.

[0043] It can be understood that the first radiating body and the second radiating body form a double-sided structure, and the second radiating body effectively makes up for the efficiency loss of the first radiating body due to the first gap 9, thereby increasing the effective radiation area of the antenna assembly and improving the overall radiation efficiency of the antenna assembly.

[0044] In some embodiments, the structure member can be a dispensing area.

[0045] In some embodiments, the second radiating body includes a first part 1 and a second part 2, at least part of the first part 1 overlaps at least part of the first gap 9 in the orthographic projection on the plastic support, one end of the second part 2 is connected with the first part 1, and the other end of the second part 2 is connected with the second feeding point 15.

[0046] It can be understood that through the combination of the first part 1 and the second part 2, the second radiating body is connected with the circuit board 12 while making up for the first gap 9, thereby ensuring the realization of the double-sided structure of the antenna assembly.

[0047] It should be noted that the first part 1 and the part of the first gap 9 can be arranged to overlap in the orthographic projection on the plastic support, or the first part 1 and the first gap 9 can be arranged to overlap in the orthographic projection on the plastic support.

[0048] In some embodiments, the length of the second radiating body as a whole can be 4.1 mm, and the width can be 2.1 mm.

[0049] In some embodiments, the planar direction of the second radiating body is parallel to the planar direction of the first radiating body. It can be understood that this arrangement makes the effective radiation area of the antenna assembly as a whole larger and the radiation efficiency higher after the combination of the first radiating body and the second radiating body.

[0050] As shown in FIG. 1, Figures 2 to 4 In some embodiments, the first radiating body can be a ring structure. It can be understood that the ring structure has higher reliability and better radiation efficiency when facing interference members such as the shielding cover 13.

[0051] In some embodiments, the first radiator comprises a U-shaped radiation arm and a third part 3, at least part of the U-shaped radiation arm and the shield 13 do not overlap in the orthographic projection on the plastic support respectively, one end of the U-shaped radiation arm is connected with the grounding point 8, the third part 3 and the shield 13 do not overlap in the orthographic projection on the plastic support respectively, one end of the third part 3 is connected with the other end of the U-shaped radiation arm, the other end of the third part 3 is connected with the first feeding point 7, and the first feeding point 7 is close to the grounding point 8, and the first gap 9 is arranged at the end of the third part 3 away from the grounding point 8.

[0052] It can be understood that the connection of the first radiator and the circuit board 12 is realized by the third part 3 and the U-shaped radiation arm, and the first radiator forms a ring structure, so that the current strong point of the antenna assembly is located in a better area of the clearance environment, thereby increasing the effective radiation area of the antenna assembly and improving the overall radiation efficiency of the antenna assembly.

[0053] As shown in Figures 2 to 4 , the U-shaped radiation arm comprises a fourth part 4, a fifth part 5 and a sixth part 6, one end of the fourth part 4 is connected with the grounding point 8, the fifth part 5 is located at the end of the shield 13 away from the third part 3, at least part of the fifth part 5 and the shield 13 do not overlap in the orthographic projection on the plastic support respectively, one end of the fifth part 5 is connected with the other end of the fourth part 4, one end of the sixth part 6 is connected with the other end of the fifth part 5, and the other end of the sixth part 6 is connected with the end of the third part 3 close to the first gap 9.

[0054] It can be understood that the U-shaped structure of the U-shaped radiation arm is realized by the arrangement of the fourth part 4, the fifth part 5 and the sixth part 6, so as to ensure the formation of the ring structure of the first radiator, and at least part of the fifth part 5 avoids the shield 13, so that the current strong point of the antenna assembly is located in a better area of the clearance environment, thereby increasing the effective radiation area of the antenna assembly and improving the overall radiation efficiency of the antenna assembly.

[0055] It should be noted that part of the fifth part 5 and the shield 13 can be arranged to not overlap in the orthographic projection on the plastic support respectively, or the fifth part 5 and the shield 13 can be arranged to not overlap in the orthographic projection on the plastic support respectively.

[0056] In some embodiments, the length direction of the fourth part 4 is parallel to the length direction of the sixth part 6, the length direction of the fifth part 5 is parallel to the length direction of the third part 3, and the length direction of the fourth part 4 is perpendicular to the length direction of the fifth part 5.

[0057] Understandably, the vertical and parallel relationship of the third part 3, the fourth part 4, the fifth part 5, and the sixth part 6 makes it easier to install the first radiator inside the terminal equipment, and it can further avoid the shielding cover 13 during installation, thereby improving the overall radiation efficiency of the antenna assembly.

[0058] like Figures 2 to 4 As shown, in some embodiments, the width of the fifth part 5 is greater than the width of the fourth part 4 and the sixth part 6.

[0059] Understandably, this arrangement allows the narrower fourth part 4 and sixth part 6 to pass through the shield 13, while the wider fifth part 5 avoids the shield 13 more, thereby increasing the effective radiation area of ​​the first radiator as a whole and improving the overall radiation efficiency of the antenna assembly.

[0060] In some embodiments, the antenna assembly further includes a fixing hole 14, which is disposed on the circuit board 12. A third notch 11 is provided on the third part 3, and the third notch 11 prevents the orthographic projections of the third part 3 and the fixing hole 14 on the plastic bracket from overlapping.

[0061] In some embodiments, a second notch 10 is provided on the second part 2, the second notch 10 so that the orthographic projections of the second part 2 and the fixing hole 14 on the plastic bracket do not overlap.

[0062] Understandably, the second notch 10 and the third notch 11 are used to avoid metal fasteners such as screws in the fixing hole 14, so as to avoid interference to the antenna assembly, so that the current strong point of the antenna assembly is located in a region with a better clearance environment, thereby improving the overall radiation efficiency of the antenna assembly.

[0063] In some embodiments, when the second notch 10 and the third notch 11 are provided, the distance between the second part 2 and the third part 3 and the fixing hole 14 in the direction of the first radiator plane is 0.3 mm.

[0064] like Figure 2 As shown, in some embodiments, the second notch 10 is larger than the third notch 11, so that the first part 1 fills the first notch 9 while keeping the second part 2 as far away from the fixing hole 14 as possible.

[0065] like Figure 2 As shown in the embodiments of this application, a terminal device is also proposed, including: an antenna assembly as described above.

[0066] Understandably, the first and second radiators are respectively set on opposite sides of the plastic bracket, thus forming a double-sided structural design, which increases the overall radiation area and effectively improves the overall radiation efficiency of the antenna assembly, enabling the antenna assembly to maintain high performance even in poor antenna clearance environments.

[0067] In some embodiments, the terminal device can be a mobile phone, a tablet computer, a smart watch, etc.

[0068] In some embodiments, the terminal device further comprises a back shell, the plastic support is located between the back shell and the circuit board 12, the distance between the shielding cover 13 and the back shell is 0.7mm, that is, the antenna clearance height of the antenna assembly is less than 0.7mm, and the distance between the first radiating body and the shielding cover 13 can be 0.65mm. It can be understood that the setting of the 0.65mm distance ensures that the antenna assembly as a whole has a good antenna clearance environment, thereby improving the overall radiation efficiency of the antenna assembly.

[0069] As shown in Figure 5 , one curve is an antenna assembly including only the first radiating body, the other curve is the antenna assembly of the present application, and the abscissa is the frequency and the ordinate is the radiation efficiency. According to Figure 5 , it can be seen that due to the setting of the first notch 9, both curves form a small efficiency pit at 3.06GHz, and the antenna assembly of the present application has an efficiency improvement of about 0.5dB relative to the antenna assembly including only the first radiating body.

[0070] As shown in Figure 6 , Figure 7 , Figure 8 , it can be seen from the current simulation results that the initial quarter eigenmode and half-wave feed point introduced mode of the antenna assembly of the present application both have strong radiation current distribution, and have high radiation efficiency.

[0071] In some embodiments, current simulation can be realized by CST software, wherein the CST software contains eight studio sub-software integrated in the same user interface, provides complete system-level and component-level numerical simulation optimization for users, and covers the entire electromagnetic frequency band, provides complete time-domain and frequency-domain full-wave electromagnetic algorithms and high-frequency algorithms, and typical applications include electromagnetic compatibility, antennas, mobile phones, nuclear magnetic resonance, electron tubes, particle accelerators, high-power microwaves, nonlinear optics, electricity, field, and various types of collaborative simulation.

[0072] It should be noted that in the description of the present application, the terms "first", "second" and the like are only for the purpose of description, and cannot be understood as indicating or implying relative importance. In addition, in the description of the present application, unless otherwise specified, the meaning of "multiple" is two or more.

[0073] Any procedural or methodological descriptions in flow charts or otherwise described herein can be understood to represent modules, segments, or portions of code that include executable instructions for implementing the logic functions or procedures described, and the scope of preferred embodiments of the present application includes additional implementations in which the functions can be performed in an order different from that shown or discussed, including substantially simultaneously, or in reverse order, as will be understood by those having ordinary skill in the art to which embodiments of the present application pertain.

[0074] In the description of the present specification, the description of the terms "one embodiment", "some embodiments", "an example", "a specific example", or "some examples" and the like means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In the present specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Also, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in an appropriate manner.

[0075] Although the embodiments of the present application have been shown and described above, it is understood that the above-described embodiments are exemplary, and are not to be construed as limiting the present application, and those of ordinary skill in the art can make changes, modifications, replacements, and variations to the above-described embodiments within the scope of the present application.

Claims

1. An antenna assembly, characterized by The application relates to an antenna assembly. The antenna assembly comprises: a plastic support comprising a first face and a second face opposite to each other; a first radiator arranged on the first face, one end of the first radiator being provided with a first feeding point, and the other end of the first radiator being provided with a grounding point; a second radiator arranged on the second face, one end of the second radiator being provided with a second feeding point; 2. The antenna assembly of claim 1, wherein, wherein a dispensing area is arranged on the first face, the first radiator is provided with a first notch at one end close to the first feeding point, the first notch is used to avoid the dispensing area, and at least part of the second radiator and at least part of the first notch respectively overlap in orthographic projection on the plastic support. The antenna assembly further comprises: a circuit board arranged on the second face of the plastic support, the first feeding point, the second feeding point and the grounding point are respectively electrically connected to the circuit board; 3. The antenna assembly of claim 2, wherein, a shielding cover arranged on the circuit board, the shielding cover is located between the circuit board and the second face, orthographic projections of the first feeding point, the grounding point and the shielding cover on the plastic support do not overlap, orthographic projections of the second feeding point and the shielding cover on the plastic support do not overlap, orthographic projections of at least part of the first radiator and the shielding cover on the plastic support do not overlap, and orthographic projections of the second radiator and the shielding cover on the plastic support do not overlap.

4. The antenna assembly of claim 2, wherein, Orthographic projections of the first feeding point and the second feeding point on the plastic support overlap, a connecting hole is arranged on the plastic support, and the first feeding point and the second feeding point are connected through the connecting hole. The second radiator comprises: a first part, orthographic projections of the first part and at least part of the first notch on the plastic support overlap; 5. The antenna assembly of claim 4, wherein, a second part, one end of the second part is connected to the first part, and the other end of the second part is connected to the second feeding point. The first radiator comprises: a U-shaped radiation arm, orthographic projections of at least part of the U-shaped radiation arm and the shielding cover on the plastic support do not overlap, one end of the U-shaped radiation arm is connected to the grounding point; 6. The antenna assembly of claim 5, wherein, a third part, orthographic projections of the third part and the shielding cover on the plastic support do not overlap, one end of the third part is connected to the other end of the U-shaped radiation arm, the other end of the third part is connected to the first feeding point, the first feeding point is close to the grounding point, and the first notch is arranged at one end of the third part away from the grounding point. The U-shaped radiation arm comprises: a fourth part, one end of the fourth part is connected to the grounding point; a fifth part, the fifth part is located at one end of the shielding cover away from the third part, orthographic projections of at least part of the fifth part and the shielding cover on the plastic support do not overlap, and one end of the fifth part is connected to the other end of the fourth part. A sixth section, one end of the sixth section is connected with the other end of the fifth section, the other end of the sixth section is connected with the third section near the one end of the first notch.

7. The antenna assembly of claim 6, wherein, The width of the fifth section is greater than the width of the fourth section and the sixth section.

8. The antenna assembly of claim 5, wherein, The antenna assembly further comprises: A fixing hole is arranged on the circuit board, a third notch is arranged on the third section, the third notch makes the orthographic projection of the third section and the fixing hole on the plastic support not overlap respectively.

9. The antenna assembly of claim 8, wherein, A second notch is arranged on the second section, the second notch makes the orthographic projection of the second section and the fixing hole on the plastic support not overlap respectively.

10. A terminal device, comprising: Comprise: The antenna assembly according to any one of claims 1-9.

Images