Antenna assembly, middle frame assembly and electronic equipment

Abstract

The utility model discloses an antenna assembly, a middle frame assembly and electronic equipment. The antenna assembly comprises a first antenna and a second antenna, wherein the first antenna is adjacent to the second antenna; and a cavity structure, wherein the cavity structure is arranged between the first antenna and the second antenna. The antenna assembly provided by the embodiment of the utility model has the advantages of high isolation and the like.

Description

Technical Field

[0001] The utility model relates to the technical field of antennas, and in particular to an antenna assembly, a middle frame assembly and an electronic device. Background Art

[0002] As the overall performance of antennas continues to improve, excess currents of adjacent antennas with similar frequencies will affect each other, resulting in poor isolation between adjacent antennas with similar frequencies. Utility Model Content

[0003] The utility model aims to solve one of the technical problems in the related art at least to a certain extent. To this end, the utility model proposes an antenna assembly, a middle frame assembly and an electronic device.

[0004] The antenna assembly according to the present invention includes: a first antenna and a second antenna, wherein the first antenna is adjacent to the second antenna; and a cavity structure, wherein the cavity structure is arranged between the first antenna and the second antenna.

[0005] The antenna assembly according to the utility model has the advantage of high isolation.

[0006] Optionally, the antenna assembly includes an isolation ground portion, which is located between the first antenna and the second antenna in a first preset direction, and the isolation ground portion is electrically connected to each of the first antenna and the second antenna, wherein the cavity structure includes the isolation ground portion.

[0007] Optionally, the isolated ground portion is L-shaped, and has a first connection end and a second connection end, the first connection end is electrically connected to the first antenna, and the second connection end is electrically connected to the second antenna.

[0008] Optionally, the cavity structure includes: a portion of a carrier plate; a portion of a main board, the portion of the main board and the portion of the carrier plate being opposite to and spaced apart from each other in a second preset direction, the second preset direction being perpendicular to the first preset direction; a grounding portion, the grounding portion being located between the portion of the carrier plate and the portion of the main board in the second preset direction, one end of the grounding portion being electrically connected to the portion of the carrier plate, and the other end of the grounding portion being electrically connected to the portion of the main board; and the isolation ground portion, a cavity being defined between the portion of the carrier plate, the portion of the main board, the grounding portion and the isolation ground portion.

[0009] Optionally, the grounding portion includes a first conductive portion and a second conductive portion, one end of each of the first conductive portion and the second conductive portion is electrically connected to the portion of the supporting board, and the other end of each of the first conductive portion and the second conductive portion is electrically connected to the portion of the main board, wherein the first conductive portion and the second conductive portion are spaced apart in a third preset direction, and the third preset direction is perpendicular to the second preset direction.

[0010] Optionally, the first conductive part is a metal spring or conductive foam, and the second conductive part is a metal spring or conductive foam.

[0011] Optionally, the first antenna is a medium-high frequency antenna, and the second antenna is a medium-high frequency antenna.

[0012] Optionally, the antenna assembly includes a radiator, and the radiator includes a portion of the first antenna, a portion of the second antenna, and the isolated ground portion.

[0013] Optionally, the isolation ground portion is L-shaped, comprising a first segment and a second segment connected to and perpendicular to each other, and the radiator is L-shaped, comprising: a third segment, the extension direction of the third segment is consistent with one of the width direction and the length direction of the carrier plate, the third segment comprising the portion of the first antenna and the first segment; and a fourth segment, the fourth segment is connected to and perpendicular to the third segment, the extension direction of the fourth segment is consistent with the other of the width direction and the length direction of the carrier plate, the fourth segment comprising the portion of the second antenna and the second segment.

[0014] The middle frame assembly according to the utility model includes the antenna assembly according to the utility model.

[0015] The middle frame assembly according to the utility model has the advantage of high antenna isolation.

[0016] The electronic device of the utility model comprises: a middle frame assembly, and the middle frame assembly is the middle frame assembly according to the utility model.

[0017] The electronic device according to the utility model has the advantages of high antenna isolation and good signal receiving and sending effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a partial structural schematic diagram of a middle frame assembly according to an embodiment of the utility model;

[0019] Figure 2 It is a partial structural schematic diagram of a middle frame assembly according to an embodiment of the utility model;

[0020] Figure 3is a partial structural schematic diagram of an antenna assembly according to an embodiment of the utility model;

[0021] Figure 4 is a comparison diagram of the isolation between the first antenna and the second antenna when the cavity structure is set and when the cavity structure is not set;

[0022] Figure 5 is a current schematic diagram of an antenna assembly according to an embodiment of the utility model;

[0023] Figure 6 This is a schematic diagram of the current when the cavity structure is not set.

[0024] Middle frame assembly 100, antenna assembly 1a,

[0025] middle frame 1, a carrying plate 11, a portion 111 of the carrying plate 11,

[0026] frame 12, radiator 121, third section 1211, fourth section 1212,

[0027] first antenna 122, first excess current 1221, a portion 1222 of the first antenna 122,

[0028] second antenna 123, second excess current 1231, a portion 1232 of the second antenna 123,

[0029] Isolation ground portion 124, first connection end 1241, second connection end 1242, first section 1243, second section 1244,

[0030] Cavity structure 125, cavity 1251,

[0031] Main board 2. A part of the main board 21.

[0032] The grounding part 3, the first conductive part 31, the second conductive part 32,

[0033] Connecting rib 4, first section 41, second section 42, DETAILED DESCRIPTION

[0034] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to be used to explain the present invention, but cannot be understood as limiting the present invention.

[0035] The antenna assembly 1a according to an embodiment of the present invention is described below with reference to the accompanying drawings. Figure 1-Figure 3As shown, the antenna assembly 1a according to the embodiment of the present invention includes a first antenna 122, a second antenna 123 and a cavity structure 125. The first antenna 122 is adjacent to the second antenna 123, and the cavity structure 125 is disposed between the first antenna 122 and the second antenna 123.

[0036] As the overall performance of antennas continues to improve, the isolation between adjacent antennas with similar frequencies will deteriorate. Figure 6 As shown, when the first antenna 122 is working, part of the current of the first antenna 122 (first excess current 1221 ) will flow into the isolated ground portion 124 , and when the second antenna 123 is working, part of the current of the second antenna 123 (second excess current 1231 ) will flow into the isolated ground portion 124 .

[0037] Therefore, when the first antenna 122 and the second antenna 123 work simultaneously, the first excess current 12211 will affect the second antenna 123, and the second excess current 1231 will affect the first antenna 122, that is, the first antenna 122 and the second antenna 123 affect each other, resulting in poor isolation between the first antenna 122 and the second antenna 123.

[0038] The cavity structure 125 is provided between the first antenna 122 and the second antenna 123 so as to couple the cavity structure 125 with the first antenna 122 and the second antenna 123. The cavity structure 125 is coupled with the first antenna 122 to couple the first excess current 1221 of the first antenna 122 with the working current of the cavity structure 125, and the cavity structure 125 is coupled with the second antenna 123 to couple the second excess current 1231 of the second antenna 123 with the working current of the cavity structure 125 (e.g., Figure 5 shown).

[0039] Thus, the first excess current 1221 and the second excess current 1231 can be introduced into the cavity structure 125 , so as to lead away the first excess current 1221 and the second excess current 1231 on the isolation ground portion 124 , so as to improve the isolation between the first antenna 122 and the second antenna 123 .

[0040] Therefore, the antenna assembly 1a according to the embodiment of the present invention has the advantages of high isolation and the like.

[0041] like Figure 1-Figure 3 As shown, the middle frame assembly 100 includes an antenna assembly 1a. Specifically, the middle frame assembly 100 includes a middle frame 1, a main board 2 and a grounding portion 3. The middle frame 1 includes a carrier board 11 and a frame 12, and the frame 12 is arranged around the carrier board 11. The main board 2 is arranged on the carrier board 11. The main board 2 can be arranged on the carrier board 11 in a known manner.

[0042] The frame 12 includes a plurality of radiators 121, which are arranged at intervals along the circumference of the frame 12 (the circumference of the middle frame 1), and there is a gap between two adjacent radiators 121. The plurality of radiators 121 include a first antenna 122, a second antenna 123 and an isolated ground portion 124 of the antenna assembly 1a, and the first antenna 122 is adjacent to the second antenna 123. There is a gap between the first antenna 122 and the carrier plate 11, and there is a gap between the second antenna 123 and the carrier plate 11.

[0043] The isolated ground portion 124 is located between the first antenna 122 and the second antenna 123 in a first preset direction, and the first preset direction may be the circumferential direction of the frame 12. The isolated ground portion 124 has a first connection end 1241 and a second connection end 1242, the first connection end 1241 of the isolated ground portion 124 is electrically connected to the first antenna 122, and the second connection end 1242 of the isolated ground portion 124 is electrically connected to the second antenna 123.

[0044] like Figure 1 and Figure 2 As shown, the isolation ground portion 124 and the bearing plate 11 are connected via connecting ribs 4 to improve the structural strength of the middle frame 1 .

[0045] like Figure 1 and Figure 2 As shown, one of the plurality of radiators 121 includes a portion 1222 of the first antenna 122, a portion 1232 of the second antenna 123, and an isolated ground portion 124. Specifically, the portion 1222 of the first antenna 122, the portion 1232 of the second antenna 123, and the isolated ground portion 124 may be integrally formed.

[0046] The isolated ground portion 124 is L-shaped. Specifically, the isolated ground portion 124 includes a first segment 1243 and a second segment 1244 connected to each other and perpendicular to each other. The one of the plurality of radiators 121 may be L-shaped. The radiator 121 includes a third segment 1211 and a fourth segment 1212, and the third segment 1211 and the fourth segment 1212 are connected to each other and perpendicular to each other.

[0047] The extension direction of the third section 1211 is consistent with one of the width direction and the length direction of the carrying plate 11, and the extension direction of the fourth section 1212 is consistent with the other of the width direction and the length direction of the carrying plate 11. The width direction of the carrying plate 11 is consistent with the width direction of the middle frame 1, and the length direction of the carrying plate 11 is consistent with the length direction of the middle frame 1.

[0048] That is, the third segment 1211 may be located on a corresponding one of the first short side and the first long side of the frame 12, and the fourth segment 1212 may be located on a corresponding other of the first short side and the first long side of the frame 12. The first short side and the first long side of the frame 12 are adjacent.

[0049] The third segment 1211 includes a portion 1222 of the first antenna 122 and a first segment 1243, and the fourth segment 1212 includes a portion 1232 of the second antenna 123 and a second segment 1244. In other words, the portion 1222 of the first antenna 122 may be located on a corresponding one of the first short side and the first long side of the frame 12, and the portion 1232 of the second antenna 123 may be located on a corresponding other of the first short side and the first long side of the frame 12.

[0050] The first section 1243 may be located on a corresponding one of the first short side and the first long side of the frame 12, and the first section 1243 has a first connection end 1241 electrically connected to the first antenna 122. The second section 1244 may be located on a corresponding other of the first short side and the first long side of the frame 12, and the second section 1244 has a second connection end 1242 electrically connected to the second antenna 123.

[0051] Optionally, the first antenna 122 is a medium-high frequency antenna, and the second antenna 123 is a medium-high frequency antenna. That is, the first antenna 122 can transmit medium frequency signals (1710MHz-2170MHz) and high frequency signals (2300MHz-2700MHz), and the second antenna 123 can transmit medium frequency signals (1710MHz-2170MHz) and high frequency signals (2300MHz-2700MHz). In the case where the cavity structure 125 is not provided, the isolation between the first antenna 122 and the second antenna 123 in the medium-high frequency band is poor, and the performance of the first antenna 122 and the second antenna 123 will also be reduced.

[0052] Moreover, within the range of the medium and high frequency bands, the lower the frequency, the worse the isolation between the first antenna 122 and the second antenna 123. Figure 5 The figure shows the current conditions of the first antenna 122 and the second antenna 123 under the FDD-LTE B3 frequency band without the cavity structure 125. The first excess current 1221 of the first antenna 122 and the second excess current 1231 of the second antenna 123 both flow into the isolation ground portion 124, causing the first antenna 122 and the second antenna 123 to affect each other and deteriorate the isolation.

[0053] The cavity structure 125 has a cavity 1251. The cavity structure 125 is coupled with the first antenna 122 to couple the first excess current 1221 of the first antenna 122 into the cavity 1251. The cavity structure 125 is coupled with the second antenna 123 to couple the second excess current 1231 of the second antenna 123 into the cavity 1251. The working current of the cavity structure 125 is concentrated inside the cavity 1251. The working current of the cavity structure 125 can be coupled with the first excess current 1221 and the second excess current 1231 so as to introduce the first excess current 1221 and the second excess current 1231 into the cavity 1251. The first excess current 1221 and the second excess current 1231 are coupled with the working current of the cavity structure 125 to generate a coupling current.

[0054] After the cavity structure 125 guides the first excess current 1221 and the second excess current 1231 away from the isolation ground portion 124, the isolation between the first antenna 122 and the second antenna 123 can be improved. In other words, the cavity structure 125 can constitute an isolation antenna. Figure 4 As shown, compared with the antenna without the cavity structure 125, the antenna assembly 1a of the utility model effectively improves the isolation between the first antenna 122 and the second antenna 123, and can improve the isolation between the first antenna 122 and the second antenna 123 by about 3dB. Figure 4 Curve 1 in FIG. 1 represents the isolation between the first antenna 122 and the second antenna 123 when the cavity structure 125 is not provided. Figure 4 Curve 2 in FIG. 1 represents the isolation between the first antenna 122 and the second antenna 123 when the cavity structure 125 is provided.

[0055] Optionally, the cavity structure 125 includes an isolated ground portion 124 , so that the first excess current 1221 and the second excess current 1231 on the isolated ground portion 124 can be more conveniently and fully introduced into the cavity 1251 of the cavity structure 125 , thereby further improving the isolation between the first antenna 122 and the second antenna 123 .

[0056] like Figure 1-Figure 3 As shown, the cavity structure 125 includes a portion 111 of the carrier plate 11, a portion 21 of the main board 2, a grounding portion 3 and an isolation grounding portion 124. The portion 111 of the carrier plate 11 and the portion 21 of the main board 2 are arranged opposite to and spaced apart from each other in a second preset direction, and the second preset direction is perpendicular to the first preset direction. The second preset direction may be the thickness direction of the middle frame 1, and the thickness direction of the middle frame 1 may be as shown in FIG. Figure 3 As shown by arrow A in FIG.

[0057] The grounding portion 3 is located between a portion 111 of the carrier plate 11 and a portion 21 of the main board 2 in the second preset direction. One end (e.g., the upper end) of the grounding portion 3 is electrically connected to the portion 111 of the carrier plate 11, and the other end (e.g., the lower end) of the grounding portion 3 is electrically connected to the portion 21 of the main board 2. A cavity 1251 is defined between the portion 111 of the carrier plate 11, the portion 21 of the main board 2, the grounding portion 3, and the isolation ground portion 124.

[0058] Thus, the first excess current 1221 and the second excess current 1231 on the isolated ground portion 124 can be better led out, thereby further improving the isolation between the first antenna 122 and the second antenna 123, and making the structure of the cavity structure 125 more reasonable. Moreover, the utility model does not need to modify the known middle frame, and the utility model fully utilizes the existing structure of the middle frame (a part of the carrier plate, a part of the main board, and the isolated ground portion), and sets the ground portion 3 between a part 111 of the carrier plate 11 and a part 21 of the main board 2 to form a cavity 1251, so as to lead the first excess current 1221 and the second excess current 1231 out of the isolated ground portion 124 and flow into the cavity 1251.

[0059] in, Figure 1 The main board 2 is shown. Figure 2 The main board 2 is not shown so that the first conductive portion 31 and the second conductive portion 32 of the ground portion 3 are exposed.

[0060] Optionally, the isolated ground portion 124 is electrically connected to a portion 111 of the carrier plate 11 , thereby making the structure of the cavity structure 125 more reasonable. For example, the isolated ground portion 124 is electrically connected to the carrier plate 11 via the connecting rib 4 .

[0061] The main board 2 may be a rectangular board. The portion 21 of the main board 2 may be a corner portion of the main board 2. The carrier board 11 may be a rectangular board. The portion 111 of the carrier board 11 may be a corner portion of the carrier board 11. The connecting rib 4 may be L-shaped, and the connecting rib 4 is electrically connected to two adjacent edges of the portion 111 of the carrier board 11.

[0062] like Figure 2 As shown, the connecting rib 4 includes a first section 41 and a second section 42 connected to each other and perpendicular to each other. The first section 41 of the connecting rib 4 is electrically connected to each of the first section 1243 of the isolated ground portion 124 and a portion 111 of the carrier plate 11, and the second section 42 of the connecting rib 4 is electrically connected to each of the second section 1244 of the isolated ground portion 124 and a portion 111 of the carrier plate 11.

[0063] like Figure 2As shown, the grounding portion 3 includes a first conductive portion 31 and a second conductive portion 32. One end (e.g., the upper end) of each of the first conductive portion 31 and the second conductive portion 32 is electrically connected to a portion 111 of the carrier plate 11, and the other end (e.g., the lower end) of each of the first conductive portion 31 and the second conductive portion 32 is electrically connected to a portion 21 of the main board 2. The first conductive portion 31 and the second conductive portion 32 are spaced apart in a third preset direction, and the third preset direction is perpendicular to the second preset direction. The third preset direction may be the length direction of the middle frame 1, and the length direction of the middle frame 1 may be as shown in FIG. Figure 2 As shown by arrow B in FIG.

[0064] Figure 2 In the embodiment, the size of the first conductive part 31 in the width direction of the middle frame 1 is smaller than the size of the second conductive part 32 in the width direction of the middle frame 1. In addition, according to the specific structural arrangement of the middle frame 1, the size of the first conductive part 31 in the width direction of the middle frame 1 can be greater than or equal to the size of the second conductive part 32 in the width direction of the middle frame 1. Figure 2 As shown by arrow C in FIG.

[0065] Optionally, the first conductive part 31 is a metal spring or conductive foam, and the second conductive part 32 is a metal spring or conductive foam. The metal spring can be connected to a portion 111 of the carrier plate 11 and a portion 21 of the main board 2 by welding, and the conductive foam can be bonded to a portion 111 of the carrier plate 11 and a portion 21 of the main board 2 by conductive glue.

[0066] The utility model also discloses an electronic device. The electronic device according to the embodiment of the utility model comprises a middle frame assembly 100. Therefore, the electronic device according to the embodiment of the utility model has the advantages of high antenna isolation, good signal receiving and transmitting effect, etc.

[0067] The electronic device of the present invention may include, for example, a mobile phone, a tablet computer, a smart wearable product, a laptop computer, a car computer, etc.

[0068] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0069] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present utility model, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0070] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection, an electrical connection, or communication with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0071] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0072] In the present utility model, the terms "one embodiment", "some embodiments", "examples", "specific examples", or "some examples" etc. mean that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present utility model. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the described specific features, structures, materials or characteristics may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0073] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations of the present invention. Ordinary technicians in the field can change, modify, replace and modify the above embodiments within the scope of the present invention.

Claims

1. An antenna assembly, characterized in that: include: a first antenna and a second antenna, the first antenna being adjacent to the second antenna; as well as a cavity structure, wherein the cavity structure is disposed between the first antenna and the second antenna; An isolation ground portion is included, the isolation ground portion is located between the first antenna and the second antenna in a first preset direction, the isolation ground portion is electrically connected to each of the first antenna and the second antenna, wherein the cavity structure includes the isolation ground portion.

2. The antenna assembly according to claim 1, characterized in that: The isolated ground portion is L-shaped and has a first connection end and a second connection end. The first connection end is electrically connected to the first antenna, and the second connection end is electrically connected to the second antenna.

3. The antenna assembly according to claim 1 or 2, characterized in that: The cavity structure comprises: A portion of a load-bearing plate; a portion of the mainboard, the portion of the mainboard and the portion of the carrier board being arranged opposite to and spaced apart from each other in a second preset direction, wherein the second preset direction is perpendicular to the first preset direction; a grounding portion, the grounding portion being located between the portion of the carrier board and the portion of the main board in the second preset direction, one end of the grounding portion being electrically connected to the portion of the carrier board, and the other end of the grounding portion being electrically connected to the portion of the main board; and A cavity is defined between the isolated ground portion, the portion of the carrier board, the portion of the main board, the ground portion and the isolated ground portion.

4. The antenna assembly according to claim 3, characterized in that: The grounding portion includes a first conductive portion and a second conductive portion, one end of each of the first conductive portion and the second conductive portion is electrically connected to the portion of the supporting board, and the other end of each of the first conductive portion and the second conductive portion is electrically connected to the portion of the main board, wherein the first conductive portion and the second conductive portion are spaced apart in a third preset direction, and the third preset direction is perpendicular to the second preset direction.

5. The antenna assembly according to claim 4, characterized in that: The first conductive part is a metal spring or conductive foam, and the second conductive part is a metal spring or conductive foam.

6. The antenna assembly according to claim 1, characterized in that: The first antenna is a medium-high frequency antenna, and the second antenna is a medium-high frequency antenna.

7. The antenna assembly according to claim 3, characterized in that: The antenna assembly includes a radiator including a portion of the first antenna, a portion of the second antenna, and the isolated ground portion.

8. The antenna assembly according to claim 7, characterized in that: The isolated ground portion is L-shaped, and includes a first section and a second section connected to each other and perpendicular to each other. The radiator is L-shaped, and includes: a third segment, wherein an extending direction of the third segment is consistent with one of a width direction and a length direction of the carrier board, and the third segment includes the portion of the first antenna and the first segment; and The fourth segment is connected to and perpendicular to the third segment, the extension direction of the fourth segment is consistent with the other of the width direction and the length direction of the supporting plate, and the fourth segment includes the part of the second antenna and the second segment.

9. A middle frame assembly, characterized in that: Comprising the antenna assembly according to any one of claims 1-8.

10. An electronic device, characterized in that: include: A middle frame assembly, wherein the middle frame assembly is the middle frame assembly according to claim 9.

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