Antenna and electronic equipment

Abstract

The invention provides an antenna and electronic equipment. The antenna comprises a radiator and a feed source. The radiator comprises a main radiation branch knot and a parasitic branch knot; the main radiation branch knot comprises a first main body part and a first coupling part which are connected, the first coupling part comprises a plurality of first sub-coupling parts which are arranged at intervals, and a first gap is formed between every two adjacent first sub-coupling parts; the parasitic branch knot comprises a second main body part and a second coupling part which are connected, the second coupling part comprises a plurality of second sub-coupling parts which are arranged at intervals, and a second gap is formed between every two adjacent second sub-coupling parts; wherein the first gap is used for accommodating the second sub-coupling part, the second gap is used for accommodating the first sub-coupling part, the first sub-coupling part and the second sub-coupling part are arranged at intervals and are sequentially arranged at intervals, and the first sub-coupling part is coupled with the second sub-coupling part; the feed source is electrically connected to the first main body portion to excite the radiator to support a target frequency band. The antenna provided by the embodiment of the invention has relatively good performance when supporting the target frequency band.

Description

Technical Field

[0001] This application relates to the field of communication technology, and in particular to an antenna and electronic device. Background Technology

[0002] With technological advancements, mobile phones and other electronic devices with communication capabilities are becoming increasingly widespread and powerful. These devices typically include antennas to enable their communication functions. However, the performance of antennas in current electronic devices is not yet optimal and requires further improvement. Summary of the Invention

[0003] In a first aspect, this application provides an antenna, the antenna comprising:

[0004] Radiator, the radiator comprising:

[0005] The main radiating branch includes a connected first main body and a first coupling part, the first coupling part including a plurality of first sub-coupling parts spaced apart, with a first gap between adjacent first sub-coupling parts; and

[0006] The parasitic branch includes a connected second main body and a second coupling part. The second coupling part includes a plurality of second sub-coupling parts spaced apart, and there is a second gap between adjacent second sub-coupling parts.

[0007] Wherein, the first gap is used to accommodate the second sub-coupling part, the second gap is used to accommodate the first sub-coupling part, the first sub-coupling part and the second sub-coupling part are spaced apart and arranged in sequence, and the first sub-coupling part is coupled to the second sub-coupling part;

[0008] and a feed source, the feed source being electrically connected to the first main body to excite the radiator to support the target frequency band.

[0009] Secondly, embodiments of this application provide an antenna, the antenna comprising:

[0010] Radiator, the radiator comprising:

[0011] The main radiating branch includes a first main body and a first coupling part connected together. The first coupling part has a first end face away from the first main body and a first side face that is bent and connected to the first end face.

[0012] The parasitic branch includes a second main body and a second coupling part connected together. The second coupling part has a second end face away from the second main body and a second side face that is bent and connected to the first end face.

[0013] Wherein, the second side faces the first side, and the second side and the first side are partially opposite each other and separated by a coupling gap, the first coupling part and the second coupling part are coupled through the coupling gap, and the area of ​​the first side and the second side facing each other is greater than the smaller area of ​​the first end face and the second end face;

[0014] and a feed source, the feed source being electrically connected to the first main body to excite the radiator to support the target frequency band.

[0015] Thirdly, embodiments of this application provide an electronic device, the electronic device including the antenna described in the first aspect;

[0016] Alternatively, the electronic device may include an antenna as described in the second aspect.

[0017] In summary, the embodiments of this application provide an antenna in which the first coupling portion of the main radiating stub includes a plurality of first sub-coupling portions spaced apart, with a first gap between adjacent first sub-coupling portions; the second coupling portion of the parasitic stub includes a plurality of second sub-coupling portions spaced apart, with a second gap between adjacent second sub-coupling portions; the first gap is used to accommodate the second sub-coupling portions, and the second gap is used to accommodate the first sub-coupling portions; thus, a larger coupling area is achieved between the first coupling portion and the second coupling portion, resulting in a larger coupling capacitance between the first coupling portion and the second coupling portion, leading to better coupling effect between the parasitic stub and the main radiating stub, and better performance of the antenna when supporting the target frequency band. Attached Figure Description

[0018] To more clearly illustrate the technical solutions of the embodiments of this application, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 A schematic diagram of an antenna provided according to one embodiment of this application;

[0020] Figure 2 for Figure 1 Enlarged view of point I in the middle;

[0021] Figure 3 for Figure 2 A schematic diagram of the central radiating branches;

[0022] Figure 4 for Figure 2 A schematic diagram of a parasitic branch;

[0023] Figure 5 A schematic diagram of an antenna provided for another embodiment of this application;

[0024] Figure 6 for Figure 2 A schematic diagram illustrating the details of the structure shown;

[0025] Figure 7 for Figure 1 A schematic diagram of the thickness of the radiator shown;

[0026] Figure 8 A schematic diagram of an antenna provided for another embodiment of this application;

[0027] Figure 9 for Figure 8 Enlarged schematic diagram at point II;

[0028] Figure 10 for Figure 8 A partial schematic diagram of the antenna from another perspective;

[0029] Figure 11 for Figure 10 Enlarged schematic diagram at point III;

[0030] Figure 12 for Figure 9 A schematic diagram showing the distance between the first and second sides of the structure shown.

[0031] Figure 13 for Figure 11 The diagram shows detailed dimensions of the structure.

[0032] Figure 14 A schematic diagram of an electronic device provided according to one embodiment of this application. Detailed Implementation

[0033] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. In addition, the reference to "embodiment" or "implementation method" in this application means that a specific feature, structure or characteristic described in connection with the embodiment or implementation method can be included in at least one embodiment of this application. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. Those skilled in the art will understand explicitly and implicitly that the embodiments described in this application can be combined with other embodiments. It should be noted that, for ease of explanation, the same reference numerals denote the same parts in the embodiments of this application, and for the sake of brevity, detailed descriptions of the same parts are omitted in different embodiments.

[0034] The terms "first," "second," etc., in the specification, claims, and accompanying drawings of this application are used to distinguish different objects, not to describe a specific order. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion. For example, a process, method, system, product, or apparatus that includes a series of steps or units is not limited to the listed steps or units, but may optionally include steps or units not listed, or may optionally include other steps or units inherent to these processes, methods, products, or apparatuses.

[0035] This application provides an antenna 10 according to one embodiment. The antenna 10 provided according to this embodiment will now be described. Please refer to [the relevant documentation / reference]. Figure 1 , Figure 2 , Figure 3 and Figure 4 , Figure 1 A schematic diagram of an antenna provided according to one embodiment of this application; Figure 2 for Figure 1 Enlarged view of point I in the middle;

[0036] Figure 3 for Figure 2 A schematic diagram of the central radiating branches; Figure 4 for Figure 2 A schematic diagram of a parasitic stub. The antenna 10 includes a radiator 100 and a feed source S. The radiator 100 includes a main radiating stub 110 and a parasitic stub 120. The main radiating stub 110 includes a connected first main body portion 111 and a first coupling portion 112. The first coupling portion 112 includes a plurality of spaced-apart first sub-coupling portions 1121, with a first gap 1122 between adjacent first sub-coupling portions 1121. The parasitic stub 120 includes a connected second main body portion 121 and a second coupling portion 122, with the second coupling portion 122 including a plurality of spaced-apart second sub-coupling portions 1221, with a second gap 1222 between adjacent second sub-coupling portions 1221. The first gap 1122 is used to accommodate the second sub-coupled portion 1221, and the second gap 1222 is used to accommodate the first sub-coupled portion 1121. The first sub-coupled portion 1121 and the second sub-coupled portion 1221 are spaced apart and arranged sequentially, and the first sub-coupled portion 1121 is coupled to the second sub-coupled portion 1221. The feed source S is electrically connected to the first main body 111 to excite the radiator 100 to support the target frequency band.

[0037] In this embodiment, the main radiating branch 110 is a flexible printed circuit (FPC) radiating branch, and the parasitic branch 120 is also a flexible printed circuit (FPC) radiating branch.

[0038] The main radiating branch 110 includes a first main body portion 111 and a first coupling portion 112 connected together. In the schematic diagram of this embodiment, the first coupling portion 112 and the main body portion are arranged along the first direction D1 as an example. It can be understood that the relative positions of the first coupling portion 112 and the first main body portion 111 are different depending on the placement posture of the main radiating branch 110.

[0039] The first coupling portion 112 includes a plurality of first sub-coupling portions 1121 spaced apart. In this embodiment, the plurality of first sub-coupling portions 1121 are arranged along a second direction D2. The second direction D2 is different from the first direction D1. In this embodiment, the first sub-coupling portions 1121 extend along the first direction D1. It should be understood that this should not be construed as a limitation on the first sub-coupling portions 1121. The first sub-coupling portions 1121 may extend along a third direction, which is different from the first direction D1 and different from the second direction D2. In the schematic diagram of this embodiment, the first sub-coupling portion 1121 is illustrated as a straight strip. In other embodiments, the first sub-coupling portion 1121 may also be a curved strip or other structures. This application does not limit the shape of the first sub-coupling portion 1121.

[0040] The parasitic branch 120 includes a connected second main body 121 and a second coupling part 122. In this embodiment, the second main body 121 and the second coupling part 122 are arranged along the first direction D1 as an example. It can be understood that the relative positions of the second main body 121 and the second coupling part 122 are different depending on the placement posture of the parasitic branch 120.

[0041] The second coupling portion 122 includes a plurality of second sub-coupling portions 1221 spaced apart. In this embodiment, the plurality of second sub-coupling portions 1221 are arranged along a second direction D2. In this embodiment, the second sub-coupling portions 1221 extend along a first direction D1. It should be understood that this should not be construed as a limitation on the second sub-coupling portions 1221. The second sub-coupling portions 1221 may extend along a fourth direction, wherein the fourth direction is different from the first direction D1 and different from the second direction D2. In the schematic diagram of this embodiment, the second sub-coupling portion 1221 is illustrated as a straight strip. In other embodiments, the second sub-coupling portion 1221 may also be a curved strip or other structures. This application does not limit the shape of the second sub-coupling portion 1221.

[0042] In this embodiment, the first gap 1122 is used to accommodate the second sub-coupling portion 1221, and the second gap 1222 is used to accommodate the first sub-coupling portion 1121, with a gap between the second sub-coupling portion 1221 and the first sub-coupling portion 1121. Thus, the first sub-coupling portion 1121 and the second sub-coupling portion 1221 are arranged alternately. In other words, the first sub-coupling portion 1121 and the second sub-coupling portion 1221 are arranged in a staggered manner. This arrangement of the plurality of first sub-coupling portions 1121 and the plurality of second sub-coupling portions 1221 is also called an interdigitated structure. The coupling of the plurality of first sub-coupling portions 1121 and the plurality of second sub-coupling portions 1221 is also called interdigitated coupling. The above-described structure and position of the first coupling part 112 and the second coupling part 122 enable a larger coupling area between them, thereby increasing the coupling capacitance and improving the coupling effect between the parasitic branch 120 and the main radiating branch 110. This results in better performance of the antenna 10 when supporting the target frequency band.

[0043] When the feed source S excites the radiator 100 to support the target frequency band, the radiator 100 can receive electromagnetic wave signals of the target frequency band, and / or the radiator 100 can emit electromagnetic wave signals of the target frequency band.

[0044] In this embodiment, the target frequency band is a low-frequency band. In other embodiments, the target frequency band may also be a mid-frequency band or a high-frequency band. When the target frequency band is a low-frequency band, the antenna 10 of this embodiment supports the low-frequency band, which can significantly improve the efficiency of the antenna 10 in the low-frequency band and provide a larger bandwidth. In other words, when the target frequency band is a low-frequency band, the antenna 10 of this embodiment supports the low-frequency band and has better antenna efficiency and a larger bandwidth.

[0045] In summary, the embodiments of this application provide an antenna 10, wherein the first coupling portion 112 of the main radiating stub 110 includes a plurality of first sub-coupling portions 1121 spaced apart, and a first gap 1122 is provided between adjacent first sub-coupling portions 1121; the second coupling portion 122 of the parasitic stub 120 includes a plurality of second sub-coupling portions 1221 spaced apart, and a second gap 1222 is provided between adjacent second sub-coupling portions 1221; the first gap 1122 is used to accommodate the second sub-coupling portions 1221, and the second gap 1222 is used to accommodate the first sub-coupling portions 1121; thus, the first coupling portion 112 and the second coupling portion 122 can have a large coupling area, thereby making the coupling capacitance between the first coupling portion 112 and the second coupling portion 122 larger, resulting in a better coupling effect between the parasitic stub 120 and the main radiating stub 110, and the antenna 10 has better performance when supporting the target frequency band.

[0046] Please refer to the following: Figures 1 to 4 and Figure 5 , Figure 5 This is a schematic diagram of an antenna according to another embodiment of this application. The antenna 10 includes a radiator 100 and a feed source S. The radiator 100 includes a main radiating stub 110 and a parasitic stub 120. The main radiating stub 110 includes a first main body portion 111 and a first coupling portion 112 connected together. The first coupling portion 112 includes a plurality of first sub-coupling portions 1121 spaced apart, with a first gap 1122 between adjacent first sub-coupling portions 1121. The parasitic stub 120 includes a second main body portion 121 and a second coupling portion 122 connected together. The second coupling portion 122 includes a plurality of second sub-coupling portions 1221 spaced apart, with a second gap 1222 between adjacent second sub-coupling portions 1221. The first gap 1122 is used to accommodate the second sub-coupled portion 1221, and the second gap 1222 is used to accommodate the first sub-coupled portion 1121. The first sub-coupled portion 1121 and the second sub-coupled portion 1221 are spaced apart and arranged sequentially, and the first sub-coupled portion 1121 is coupled to the second sub-coupled portion 1221. The feed source S is electrically connected to the first main body 111 to excite the radiator 100 to support the target frequency band.

[0047] Please refer to the previous description of the radiator 100 and the feed source S, and they will not be repeated here.

[0048] In this embodiment, the first main body 111 of the main radiator 100 has a feed point P, and the feed source S is electrically connected to the feed point P. The antenna 10 also includes a ground electrode 200. The second main body 121 of the parasitic stub 120 has a grounding point G. The grounding point G is electrically connected to the ground electrode 200 for grounding. In this embodiment, the ground electrode 200 includes a first side 200a and a second side 200b that are bent and connected. The length of the second side 200b is greater than the length of the first side 200a. In this embodiment, the radiator 100 is disposed corresponding to the second side 200b of the ground electrode 200.

[0049] When the antenna 10 supports the target frequency band, a ground current is also generated on the ground electrode 200. The ground current includes a lateral current and a longitudinal current, wherein the lateral current extends along the extension direction of the first side 200a, and the longitudinal current extends along the extension direction of the second side 200b. As described above, the structure and position of the first coupling part 112 and the second coupling part 122 allow for a larger coupling area between them, resulting in a larger coupling capacitance. This, in turn, effectively increases the proportion of the longitudinal current of the ground electrode 200 to the ground current, thereby improving the performance of the antenna 10 in supporting the target frequency band. The resonant mode corresponding to the lateral current is called the lateral mode, and the resonant mode corresponding to the longitudinal current is also called the lateral mode. Effectively increasing the proportion of the longitudinal current of the ground electrode 200 to the ground current, in other words, also means effectively increasing the proportion of the longitudinal mode of the ground electrode 200 to the total mode of the ground electrode 200, where the total mode includes both the longitudinal mode and the lateral mode.

[0050] Furthermore, in one embodiment, the sum N0 of the number of the first sub-coupling portion 1121 and the second sub-coupling portion 1221 satisfies: 6≤N0≤12.

[0051] The sum N0 of the number of the first sub-coupling portion 1121 and the second sub-coupling portion 1221 can be, but is not limited to, 6, 7, 8, 9, 10, 11, or 12. See also... Figure 3 and Figure 4 In the schematic diagram of this embodiment, the number of the first sub-coupling part 1121 is 6 and the number of the second sub-coupling part 1221 is 6 as an example. It should be understood that this should not be construed as a limitation on the embodiment of this application.

[0052] When the morphological and dimensional parameters of the first sub-coupling part 1121 and the second sub-coupling part 1221 are fixed, the number of the first sub-coupling part 1121 and the second sub-coupling part 1221 has a relatively important influence on the coupling effect between the parasitic branch 120 and the main radiating branch 110.

[0053] Generally speaking, when the number of the first sub-coupled part 1121 and the second sub-coupled part 1221 is small, the coupling effect between the parasitic branch 120 and the main radiating branch 110 is poor; when the number of the first sub-coupled part 1121 and the second sub-coupled part 1221 is too large, after the performance of the antenna 10 in supporting the target frequency band reaches a certain level, the improvement effect of further improvement is not significant, and the cost of the antenna 10 is large, and it is not conducive to the layout of the antenna 10 in the electronic device 1 in which the antenna 10 is applied.

[0054] The antenna 10 provided in this application embodiment has a sum N0 of the number of the first sub-coupling part 1121 and the second sub-coupling part 1221 satisfying: 6≤N0≤12. On the one hand, this can make the coupling effect between the parasitic branch 120 and the main radiating branch 110 better. On the other hand, it can make the cost of the antenna 10 reasonable and facilitate the layout of the antenna 10 in the electronic device 1 in which the antenna 10 is applied.

[0055] Please see Figure 3 and Figure 4 The width W1 of the first sub-coupling portion 1121 satisfies: 0.3mm ≤ W1 ≤ 0.5mm, and the length L1 of the first sub-coupling portion 1121 satisfies: 2mm ≤ L1 ≤ 5mm. The width W2 of the second sub-coupling portion 1221 satisfies: 0.3mm ≤ W2 ≤ 0.5mm, and the length L2 of the second sub-coupling portion 1221 satisfies: 2mm ≤ L2 ≤ 5mm.

[0056] The width W1 of the first sub-coupling portion 1121 can be, but is not limited to, 0.3mm, 0.35mm, 0.4mm, 0.45mm, or 0.5mm. The length L1 of the first sub-coupling portion 1121 can be, but is not limited to, 2mm, 2.5mm, 3mm, 3.5mm, 4mm, 4.5mm, or 5mm.

[0057] Accordingly, the width W2 of the second sub-coupling portion 1221 can be, but is not limited to, 0.3 mm, 0.35 mm, 0.4 mm, 0.45 mm, or 0.5 mm. The length L2 of the second sub-coupling portion 1221 can be, but is not limited to, 2 mm, 2.5 mm, 3 mm, 3.5 mm, 4 mm, 4.5 mm, or 5 mm.

[0058] When the size of the gap between the first sub-coupler 1121 and the second sub-coupler 1221 is constant, the width W1 of the first sub-coupler 1121 satisfies: 0.3mm ≤ W1 ≤ 0.5mm, and the length L1 of the first sub-coupler 1121 satisfies: 2mm ≤ L1 ≤ 5mm. The width W2 of the second sub-coupler 1221 satisfies: 0.3mm ≤ W2 ≤ 0.5mm, and the length L2 of the second sub-coupler 1221 satisfies: 2mm ≤ L2 ≤ 5mm. This ensures better coupling between the parasitic stub 120 and the main radiating stub 110, resulting in better performance of the antenna 10 when supporting the target frequency band.

[0059] Please see Figure 6 , Figure 6 for Figure 2 The diagram shows a detailed representation of the structure. The gap dimension d between the first sub-coupling part 1121 and the second sub-coupling part 1221 satisfies: 0.2mm ≤ d ≤ 0.3mm.

[0060] The gap d between the first sub-coupling part 1121 and the second sub-coupling part 1221 can be, but is not limited to, 0.2mm, 0.21mm, 0.22mm, 0.23mm, 0.24mm, 0.25mm, 0.26mm, 0.27mm, 0.28mm, 0.29mm, or 0.30mm.

[0061] The gap dimension d between the first sub-coupling part 1121 and the second sub-coupling part 1221 satisfies: 0.2mm≤d≤0.3mm, which can make the coupling effect between the parasitic branch 120 and the main radiating branch 110 better, and the antenna 10 has better performance when supporting the target frequency band.

[0062] Specifically, please refer to the following: Figures 2 to 4 and Figure 6 In one embodiment, the first main body portion 111 has a first main body end face 111a on which the plurality of first sub-coupling portions 1121 are disposed. The first sub-coupling portion 1121 has a first sub-end face 1121a facing away from the first main body portion 111 and a first sub-side face 1121b that is bent and connected to the first sub-end face 1121a.

[0063] Accordingly, the second main body portion 121 also has a second main body end face 121a on which the plurality of second sub-coupling portions 1221 are disposed. The second sub-coupling portion 1221 has a second sub-end face 1221a facing away from the second main body portion 121 and a second sub-side face 1221b bent and connected to the second sub-end face 1221a. The second sub-side face 1221b faces the first sub-side face 1121b. In the arrangement direction of the first sub-side face 1121b and the second sub-side face 1221b, the dimension between the first sub-side face 1121b and the second sub-side face 1221b is the gap d between the first sub-coupling portion 1121 and the second sub-coupling portion 1221.

[0064] In this embodiment, the first sub-end face 1121a and the second main body end face 121a are opposite to each other and spaced apart. The dimension between the first sub-end face 1121a and the second main body end face 121a in the arrangement direction of the two faces is denoted as gap d1. In one embodiment, the gap dimension d1 satisfies: 0.2mm ≤ d1 ≤ 0.3mm.

[0065] The gap d1 can be, but is not limited to, 0.2mm, 0.21mm, 0.22mm, 0.23mm, 0.24mm, 0.25mm, 0.26mm, 0.27mm, 0.28mm, 0.29mm, or 0.30mm.

[0066] The gap size d1 satisfies: 0.2mm≤d1≤0.3mm, which can make the coupling effect between the parasitic branch 120 and the main radiating branch 110 better, and the antenna 10 has better performance when supporting the target frequency band.

[0067] In this embodiment, the second sub-end face 1221a is opposite to and spaced apart from the first main body end face 111a. The dimension between the second sub-end face 1221a and the first main body end face 111a in the arrangement direction of the two faces is denoted as gap d2. In one embodiment, the gap dimension d2 satisfies: 0.2mm ≤ d2 ≤ 0.3mm.

[0068] The gap d2 can be, but is not limited to, 0.2mm, 0.21mm, 0.22mm, 0.23mm, 0.24mm, 0.25mm, 0.26mm, 0.27mm, 0.28mm, 0.29mm, or 0.30mm.

[0069] The gap size d2 satisfies: 0.2mm≤d2≤0.3mm, which can make the coupling effect between the parasitic branch 120 and the main radiating branch 110 better, and the antenna 10 has better performance when supporting the target frequency band.

[0070] Please refer to it again. Figure 6 The width W0 of the radiator 100 satisfies: 2.5mm≤W0≤4.0mm.

[0071] The width W0 of the radiator 100 can be, but is not limited to, 2.5 mm, 3 mm, 3.5 mm, or 4 mm.

[0072] In this embodiment, the width W0 of the radiator 100 satisfies: 2.5mm≤W0≤4.0mm, which allows the radiator 100 to better support the target frequency band and also facilitates the layout of the radiator 100 in the electronic device 1 (such as a mobile phone).

[0073] Please see Figure 7 , Figure 7 for Figure 1 The diagram shows the thickness of the radiator. The radiator 100 is a flexible printed circuit board (FPC) radiator, and the thickness D of the radiator 100 satisfies: 0.12mm≤D≤0.16mm.

[0074] The thickness D of the radiator 100 can be, but is not limited to, 0.12 mm, 0.13 mm, 0.14 mm, 0.15 mm, or 0.16 mm.

[0075] When the radiator 100 is an FPC radiator, if the thickness of the radiator 100 is too small, it is difficult to implement; if the thickness of the radiator 100 is too large, it is not conducive to the layout of the radiator 100 in the electronic device 1 on which the antenna 10 is applied. In the antenna 10 provided by this application, the thickness D of the radiator 100 satisfies: 0.12mm ≤ D ≤ 0.16mm. This is beneficial on the one hand, as the radiator 100 can be implemented and is relatively easy to manufacture; on the other hand, it is also beneficial to the layout of the radiator 100 in the electronic device 1 on which the antenna 10 is applied.

[0076] The sum of the number of the first sub-coupling portion 1121 and the second sub-coupling portion 1221 is determined by the width and thickness of the radiator 100.

[0077] The width W0 of the radiator 100 satisfies: 2.5mm≤W0≤4.0mm; the thickness D of the radiator 100 satisfies: 0.12mm≤D≤0.16mm; this facilitates the formation of a suitable number and size of first sub-coupled parts 1121 and second sub-coupled parts 1221 in the radiator 100, resulting in better coupling between the parasitic stub 120 and the main radiating stub 110, and better performance of the antenna 10 when supporting the target frequency band.

[0078] Please see Figure 8 , Figure 9 , Figure 10 and Figure 11 , Figure 8 A schematic diagram of an antenna provided for another embodiment of this application; Figure 9 for Figure 8 Enlarged schematic diagram at point II; Figure 10 for Figure 8 A partial schematic diagram of the antenna from another perspective; Figure 11 for Figure 10 Enlarged schematic diagram at point III. The antenna 10 includes a radiator 100 and a feed source S. The radiator 100 includes a main radiating stub 110 and a parasitic stub 120. The main radiating stub 110 includes a first main body portion 111 and a first coupling portion 112 connected together. The first coupling portion 112 has a first end face 112a facing away from the first main body portion 111 and a first side face 112b bent and connected to the first end face 112a. The parasitic stub 120 includes a second main body portion 121 and a second coupling portion 122 connected together. The second coupling portion 122 has a second end face 122a facing away from the second main body portion 121 and a second side face 122b bent and connected to the first end face 112a. The second side face 122b faces the first side face 112b, and the second side face 122b and the first side face 112b are partially opposite each other and spaced apart by a coupling gap 122c. The first coupling portion 112 and the second coupling portion 122 are coupled through the coupling gap 122c. The area of ​​the first side surface 112b and the second side surface 122b facing each other is larger than the smaller area of ​​the first end surface 112a and the second end surface 122a. The feed source S is electrically connected to the first main body 111 to excite the radiator 100 to support the target frequency band.

[0079] In this embodiment, the first coupling portion 112 has a first side surface 112b, and the second coupling portion 122 has a second side surface 122b. The second side surface 122b faces the first side surface 112b, and a coupling gap 122c is spaced between the second side surface 122b and the first side surface 112b. The first coupling portion 112 and the second coupling portion 122 are coupled through the coupling gap 122c. In other words, the main radiating branch 110 and the parasitic branch 120 are coupled through the first side surface 112b and the second side surface 122b. Generally, the area of ​​the first side surface 112b is larger than the area of ​​the first end surface 112a, and the area of ​​the second side surface 122b is larger than the area of ​​the second end surface 122a. Therefore, the main radiating branch 110 and the parasitic branch 120 are coupled through the first side surface 112b and the second side surface 122b, which makes the facing area between the main radiating branch 110 and the parasitic branch 120 larger. In other words, it makes the coupling area between the first coupling part 112 and the second coupling part 122 larger, thereby making the coupling capacitance between the first coupling part 112 and the second coupling part 122 larger, and making the coupling effect between the parasitic branch 120 and the main radiating branch 110 better. The better the performance of the antenna 10 when supporting the target frequency band.

[0080] Specifically, in this embodiment, the facing areas of the first side surface 112b and the second side surface 122b in the first coupling portion 112 and the second coupling portion 122 are at least larger than the smaller area of ​​the first end surface 112a and the second end surface 122a. For example, if the area of ​​the first end surface 112a is smaller than the area of ​​the second end surface 122a, then the facing areas are at least larger than the area of ​​the first end surface 112a. If the area of ​​the second end surface 122a is smaller than the area of ​​the first end surface 112a, then the facing areas are at least larger than the area of ​​the second end surface 122a.

[0081] In summary, since the second side 122b and the first side 112b are partially opposite each other and separated by a coupling gap 122c, and the first coupling part 112 and the second coupling part 122 are coupled through the coupling gap 122c, the area of ​​the first side 112b and the second side 122b facing each other is larger than the smaller area of ​​the first end face 112a and the second end face 122a. This allows for a larger coupling area between the first coupling part 112 and the second coupling part 122, resulting in a larger coupling capacitance between the first coupling part 112 and the second coupling part 122. Consequently, the coupling effect between the parasitic branch 120 and the main radiating branch 110 is better, and the performance of the antenna 10 when supporting the target frequency band is better.

[0082] Please see Figure 12 , Figure 12 for Figure 9 The diagram shows the spacing between the first and second sides of the structure. The spacing d' between the second side 122b and the first side 112b satisfies: 0.2mm ≤ d' ≤ 0.6mm.

[0083] For example, the distance d' between the second side 122b and the first side 112b can be, but is not limited to, 0.2mm, 0.25mm, 0.3mm, 0.35mm, 0.4mm, 0.45mm, 0.5mm, 0.55mm, or 0.6mm.

[0084] When the areas of the first side 112b and the second side 122b facing each other are fixed, the distance d' between the second side 122b and the first side 112b satisfies: 0.2mm≤d'≤0.6mm, which can make the coupling effect between the parasitic branch 120 and the main radiating branch 110 better, and the antenna 10 has better performance when supporting the target frequency band.

[0085] Please refer to the following: Figure 1 and Figure 13 , Figure 13 for Figure 11 The diagram shows detailed dimensions of the structure. The length L' of the portion of the first coupling part 112 and the second coupling part 122 facing each other satisfies: 2mm ≤ L' ≤ 5mm. The width W' of the portion of the first coupling part 112 and the second coupling part 122 facing each other satisfies: 1mm ≤ W' ≤ 3mm.

[0086] For example, the length L' of the portion of the first coupling part 112 and the second coupling part 122 facing each other can be, but is not limited to, 2 mm, 2.5 mm, 3 mm, 3.5 mm, 4 mm, 4.5 mm, or 5 mm. The width W' of the portion of the first coupling part 112 and the second coupling part 122 facing each other can be, but is not limited to, 1 mm, 1.5 mm, 2 mm, 2.5 mm, or 3 mm.

[0087] With a fixed distance d' between the first side 112b and the second side 122b, the length L' of the opposite portion of the first coupling part 112 and the second coupling part 122 satisfies: 2mm ≤ L' ≤ 5mm. The width W' of the opposite portion of the first coupling part 112 and the second coupling part 122 satisfies: 1mm ≤ W' ≤ 3mm. This allows for a larger coupling area between the first coupling part 112 and the second coupling part 122, resulting in a larger coupling capacitance between them. Consequently, the coupling effect between the parasitic stub 120 and the main radiating stub 110 is better, and the antenna 10 performs better when supporting the target frequency band.

[0088] In this embodiment, the main radiating branch 110 is a flexible printed circuit board (FPC) radiator 100, and the parasitic branch 120 is a metal branch. When the antenna 10 is applied in the electronic device 1, the parasitic branch 120 can be a frame radiator formed on the middle frame 50 of the electronic device 1.

[0089] Please refer to further information. Figure 8 and Figure 9 The first main body 111 of the main radiator 100 has a feed point P, and the feed source S is electrically connected to the feed point P. The antenna 10 also includes a ground electrode 200. The second main body 121 of the parasitic stub 120 has a ground point G. The ground point G is electrically connected to the ground electrode 200 for grounding. In this embodiment, the ground point G is located at the end of the second main body 121 away from the second coupling part 122. When the main radiator 100 is an FPC radiator and the parasitic stub 120 is a metal stub, the parasitic stub 120 has a ground point G, and the position of the ground point G of the metal stub (also called the return-to-ground position) can be controlled relatively easily. Therefore, it is relatively easy to make the facing length of the first side 112b and the second side 122b relatively long. With a fixed width between the first side 112b and the second side 122b, the length between the first side 112b and the second side 122b is relatively long. Therefore, the coupling area between the parasitic branch 120 and the main radiating branch 110 is larger, which in turn results in a larger coupling capacitance between the first coupling portion 112 and the second coupling portion 122. This leads to a better coupling effect between the parasitic branch 120 and the main radiating branch 110, and better performance of the antenna 10 when supporting the target frequency band.

[0090] Please continue reading. Figure 8In this embodiment, the ground electrode 200 includes a first side 200a and a second side 200b that are bent and connected. The length of the second side 200b is greater than the length of the first side 200a. In this embodiment, the radiator 100 is disposed corresponding to the second side 200b of the ground electrode 200.

[0091] When the antenna 10 supports the target frequency band, a ground current is also generated on the ground electrode 200. The ground current includes a lateral current and a longitudinal current, wherein the lateral current extends along the extension direction of the first side 200a, and the longitudinal current extends along the extension direction of the second side 200b. As described above, the structure and position of the first coupling part 112 and the second coupling part 122 allow for a larger coupling area between them, resulting in a larger coupling capacitance. This, in turn, effectively increases the proportion of the longitudinal current of the ground electrode 200 to the ground current, thereby improving the performance of the antenna 10 in supporting the target frequency band. The resonant mode corresponding to the lateral current is called the lateral mode, and the resonant mode corresponding to the longitudinal current is also called the lateral mode. Effectively increasing the proportion of the longitudinal current of the ground electrode 200 to the ground current, in other words, also means effectively increasing the proportion of the longitudinal mode of the ground electrode 200 to the total mode of the ground electrode 200, where the total mode includes both the longitudinal mode and the lateral mode.

[0092] In summary, one embodiment of this application provides an antenna 10, which includes a first coupling portion 112, the first coupling portion 112 including a plurality of first sub-coupling portions 1121 spaced apart, with a first gap 1122 between adjacent first sub-coupling portions 1121; the antenna 10 also includes a second coupling portion 122, the second coupling portion 122 including a plurality of second sub-coupling portions 1221 spaced apart, with a second gap 1222 between adjacent second sub-coupling portions 1221. The first gap 1122 is used to accommodate the second sub-coupling portions 1221, and the second gap 1222 is used to accommodate the first sub-coupling portions 1121, with a gap between the second sub-coupling portions 1221 and the first sub-coupling portions 1121, thus the first sub-coupling portions 1121 and the second sub-coupling portions 1221 are arranged sequentially at intervals. In other words, the first sub-coupling portions 1121 and the second sub-coupling portions 1221 are arranged sequentially and intersectingly. The above-described arrangement of the plurality of first sub-coupled portions 1121 and the plurality of second sub-coupled portions 1221 is also referred to as an interdigitated structure. Therefore, the antenna 10 provided in this embodiment can significantly increase the coupling area between the main radiator 100 and the parasitic branch 120 through interdigitated coupling, thereby effectively improving the performance of the target frequency band (such as a low-frequency band) supported by the antenna 10.

[0093] In one embodiment, the radiator 100 is an FPC radiator. Therefore, when the antenna 10 includes a cross-toggle structure, this cross-toggle structure can be easily implemented during FPC fabrication without increasing costs or production difficulty.

[0094] Understandably, when the radiator 100 is an FPC radiator, a dielectric layer is provided on the outer surface of the radiator 100, and a dielectric layer is provided in the gap between the first sub-coupling portion 1121 and the second sub-coupling portion 1221. The dielectric layer is used to protect the radiator 100.

[0095] Another embodiment of the antenna 10 provided in this application includes a first coupling portion 112 having a first end face 112a facing away from the first main body portion 111 and a first side face 112b bent and connected to the first end face 112a. The parasitic branch 120 includes a connected second main body portion 121 and a second coupling portion 122. The second coupling portion 122 has a second end face 122a facing away from the second main body portion 121 and a second side face 122b bent and connected to the first end face 112a. The second side face 122b faces the first side face 112b, and the second side face 122b and the first side face 112b are partially opposite each other with a coupling gap 122c. The first coupling portion 112 and the second coupling portion 122 are coupled through the coupling gap 122c. In this way, the coupling area between the main radiator 100 and the parasitic radiator 100 can be increased, thereby effectively improving the performance of the target frequency band (such as the low frequency band) supported by the antenna 10.

[0096] Please see Figure 14 , Figure 14 This is a schematic diagram of an electronic device provided according to one embodiment of this application. The electronic device 1 includes an antenna 10. The antenna 10 is described above and will not be repeated here.

[0097] In one embodiment, the electronic device 1 further includes a display screen 30, a mid-frame 50, a battery cover 70, and a battery. The display screen 30 is the component in the electronic device 1 that performs the display function. The mid-frame 50 is disposed on one side of the display screen 30. The battery cover 70 is disposed on the side of the mid-frame 50 opposite to the display screen 30. A battery compartment is provided between the battery cover 70 and the mid-frame 50. The electronic device 1 also includes a battery disposed in the battery compartment.

[0098] In one embodiment, when the electronic device 1 is in portrait mode, the electronic device 1 has a top end 1a and a bottom end 1b. In one embodiment, the battery compartment is disposed adjacent to the bottom end 1b. In one embodiment, when the target frequency band supported by the antenna 10 is a low-frequency band, the antenna 10 can be disposed on either side of the battery compartment. When the target frequency band supported by the antenna 10 is a low-frequency band, the radiator 100 of the antenna 10 is larger in size, and the space on either side of the battery compartment is larger, thereby facilitating the layout of the radiator 100. It can be understood that the target frequency band can be a mid-frequency band or a high-frequency band, etc. Correspondingly, the position of the radiator 100 of the antenna 10 can also be other positions, such as being disposed at the top end 1a of the electronic device 1, or disposed in the middle of the electronic device 1.

[0099] The above description represents some embodiments of this application. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principles of this application, and these improvements and modifications are also considered to be within the scope of protection of this application.

Claims

1. An antenna, characterized in that, The antenna includes: Radiator, the radiator comprising: The main radiating branch includes a connected first main body and a first coupling part, the first coupling part including a plurality of first sub-coupling parts spaced apart, with a first gap between adjacent first sub-coupling parts; and The parasitic branch includes a connected second main body and a second coupling part. The second coupling part includes a plurality of second sub-coupling parts spaced apart, and there is a second gap between adjacent second sub-coupling parts. Wherein, the first gap is used to accommodate the second sub-coupling part, the second gap is used to accommodate the first sub-coupling part, the first sub-coupling part and the second sub-coupling part are spaced apart and arranged in sequence, and the first sub-coupling part is coupled to the second sub-coupling part; and a feed source, the feed source being electrically connected to the first main body to excite the radiator to support the target frequency band.

2. The antenna as described in claim 1, characterized in that, The sum N0 of the number of the first sub-coupled part and the second sub-coupled part satisfies: 6≤N0≤12.

3. The antenna as described in claim 2, characterized in that, The width W1 of the first sub-coupled part satisfies: 0.3mm≤W1≤0.5mm, and the length L1 of the first sub-coupled part satisfies: 2mm≤L1≤5mm; The width W2 of the second sub-coupling part satisfies: 0.3mm≤W2≤0.5mm, and the length L2 of the second sub-coupling part satisfies: 2mm≤L2≤5mm.

4. The antenna as described in claim 1 or 2, characterized in that, The gap dimension d between the first sub-coupling part and the second sub-coupling part satisfies: 0.2mm≤d≤0.3mm.

5. The antenna as described in claim 3, characterized in that, The width W0 of the radiator satisfies: 2.5mm≤W0≤4.0mm.

6. The antenna as described in claim 5, characterized in that, The radiator is an FPC radiator, and the thickness D of the radiator satisfies: 0.12mm≤D≤0.16mm.

7. An antenna, characterized in that, The antenna includes: Radiator, the radiator comprising: The main radiating branch includes a first main body and a first coupling part connected together. The first coupling part has a first end face away from the first main body and a first side face that is bent and connected to the first end face. The parasitic branch includes a second main body and a second coupling part connected together. The second coupling part has a second end face away from the second main body and a second side face that is bent and connected to the first end face. Wherein, the second side faces the first side, and the second side and the first side are partially opposite each other and separated by a coupling gap, the first coupling part and the second coupling part are coupled through the coupling gap, and the area of ​​the first side and the second side facing each other is greater than the smaller area of ​​the first end face and the second end face; and a feed source, the feed source being electrically connected to the first main body to excite the radiator to support the target frequency band.

8. The antenna as claimed in claim 7, characterized in that, The distance d' between the second side and the first side satisfies: 0.2mm≤d'≤0.6mm.

9. The antenna as claimed in claim 7, characterized in that, The length L' of the portion of the first coupling part and the portion of the second coupling part that are directly opposite each other satisfies: 2mm≤L'≤5mm; The width W' of the portion directly opposite the first coupling part and the second coupling part satisfies: 1mm≤W'≤3mm.

10. An electronic device, characterized in that, The electronic device includes the antenna as described in any one of claims 1-6; Alternatively, the electronic device may include an antenna as described in any one of claims 7-9.

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