Antenna and electronic equipment

Abstract

The utility model embodiment discloses an antenna and an electronic device, the antenna includes a flexible circuit board and an antenna body, the flexible circuit board is provided with a feed pad and a ground feed pad arranged at intervals, the antenna body includes a first radiation branch, a first connection branch, a second radiation branch, a second connection branch and a third radiation branch, the first radiation branch, the first connection branch, the second radiation branch, the second connection branch and the third radiation branch are all embedded in the flexible circuit board, and the first radiation branch, the first connection branch, the second radiation branch, the second connection branch and the third radiation branch are connected end to end in sequence, and the feed pad and the ground feed pad are both connected to the first connection branch. Through the above method, the flexible circuit board of the utility model embodiment can be deformed in any direction, and then the antenna body can follow the deformation of the flexible circuit board, thereby avoiding the cable passing through the transmission area of ​​the antenna body, so as to reduce the interference of the antenna body and affect its performance, and improve the efficiency of the antenna body.

Description

Technical Field

[0001] The embodiments of the utility model relate to the technical field of antennas, and in particular to an antenna and electronic equipment. Background Art

[0002] With the vigorous development of the electronics industry, Bluetooth communication antennas have become standard electronic components in electronic products.

[0003] Among them, electronic products that widely use Bluetooth communication antennas include smart wearable devices, such as AR glasses. AR glasses are a device that improves or expands the user's visual perception by superimposing virtual images, information or scenes on the user's real environment, so as to capture the user's environment and present corresponding augmented reality content. The Bluetooth communication antenna is one of the core components of AR glasses, but the existing Bluetooth communication antennas all set the antenna components on the PCB board. The Bluetooth communication antenna is in the form of a sheet and has a very high overall hardness. However, due to the limitation of the internal space of AR glasses, and the charging cable, speaker cable and other cables for transmission inside the AR glasses, the charging cable, speaker cable and other cables for transmission pass through the transmission area of ​​the Bluetooth communication antenna, which will affect the performance of the Bluetooth communication antenna, reduce the efficiency of the Bluetooth communication antenna, and affect the normal use of AR glasses. Utility Model Content

[0004] The main technical problem solved by the embodiments of the utility model is to provide an antenna and an electronic device that can be deformed in any direction to avoid interference and improve efficiency.

[0005] In order to solve the above technical problems, a technical solution adopted in an embodiment of the utility model is: to provide an antenna, including a flexible circuit board and an antenna body, the flexible circuit board is provided with a feed pad and a ground feed pad, the feed pad and the ground feed pad are arranged at intervals, the antenna body includes a first radiating branch, a first connecting branch, a second radiating branch, a second connecting branch and a third radiating branch, the first radiating branch, the first connecting branch, the second radiating branch, the second connecting branch and the third radiating branch are all embedded in the flexible circuit board, and the first radiating branch, the first connecting branch, the second radiating branch, the second connecting branch and the third radiating branch are connected end to end in sequence, and the feed pad and the ground feed pad are both connected to the first connecting branch.

[0006] Optionally, the flexible circuit board is also provided with a notch, which divides the flexible circuit board into a first part and a second part, the feeding pad and the ground feeding pad are located in the first part, the first radiating branch and the first connecting branch are located in the first part, the second radiating branch extends from the first part to the second part, and the second connecting branch and the third radiating branch are located in the second part.

[0007] Optionally, the first radiating branch includes a first radiating portion and a second radiating portion, one end of the first radiating portion is connected to the first connecting branch, the other end of the first radiating portion is connected to the second radiating portion, and the first radiating portion is perpendicular to the second radiating portion.

[0008] Optionally, the first connecting branch includes a first connecting portion and a second connecting portion, one end of the first connecting portion is vertically connected to the first radiating portion, and one end of the first connecting portion is connected to the feed and ground pads, the other end of the first connecting portion is vertically connected to the second connecting portion, and the other end of the first connecting portion is connected to the feed pad.

[0009] Optionally, an area of ​​the first connecting portion is greater than the sum of areas of the feeding pad and the ground feeding pad.

[0010] Optionally, the second radiation branch is connected to an end of the second connection portion away from the first connection portion, the first connection portion, the second connection portion and the second radiation branch are jointly enclosed to form a receiving groove, and the first radiation branch is arranged in the receiving groove.

[0011] Optionally, the second radiation branch and the third radiation branch are arranged in parallel and spaced apart to form a gap, the gap is spaced apart from the receiving groove, and the second connecting branch is arranged in the gap.

[0012] Optionally, the second connecting branch includes a third connecting part, a fourth connecting part and a fifth connecting part, and the third connecting part, the fourth connecting part and the fifth connecting part are vertically connected end to end in sequence, an end of the third connecting part away from the fourth connecting part is vertically connected to the second radiating branch, and an end of the fifth connecting part away from the fourth connecting part is vertically connected to the third radiating branch.

[0013] Optionally, the radiation electrical length of the antenna body is 1 / 4 wavelength of the Bluetooth frequency band.

[0014] In order to solve the above technical problem, another technical solution adopted by the embodiment of the utility model is: to provide an electronic device, including the above antenna.

[0015] The beneficial effects of the embodiment of the utility model are as follows: different from the prior art, the embodiment of the utility model includes a flexible circuit board and an antenna body, the flexible circuit board is provided with a feed pad and a ground feed pad, the feed pad and the ground feed pad are arranged at intervals, the antenna body includes a first radiation branch, a first connection branch, a second radiation branch, a second connection branch and a third radiation branch, the first radiation branch, the first connection branch, the second radiation branch, the second connection branch and the third radiation branch are all embedded in the flexible circuit board, and the first radiation branch, the first connection branch, the second radiation branch, the second connection branch and the third radiation branch are connected end to end in sequence, and the feed pad and the ground feed pad are both connected to the first connection branch. Through the above method, the flexible circuit board of the embodiment of the utility model can be deformed in any direction, and then the antenna body can follow the deformation of the flexible circuit board, thereby avoiding the cable passing through the transmission area of ​​the antenna body, so as to reduce the interference of the antenna body and affect its performance, and improve the efficiency of the antenna body. In addition, the antenna of the embodiment of the utility model can utilize the bending characteristics of the flexible circuit board, which is effective in the internal space of different machines (for example: mobile phones, tablets or charging piles, etc.), and can be adjusted to reach the frequency band required by the user. It has wide applicability. Moreover, the antenna of the embodiment of the utility model can utilize the bending characteristics of the flexible circuit board to realize a shared mold, and there is no need to re-open the mold, thereby effectively saving costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the specific embodiments of the utility model or the technical solutions in the prior art, the following is a brief introduction to the drawings required for the specific embodiments or the prior art description. In all the drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, each element or part is not necessarily drawn according to the actual scale.

[0017] Figure 1 It is a schematic diagram of the overall structure of the antenna provided by an embodiment of the utility model;

[0018] Figure 2 It is a return loss parameter diagram of the antenna provided by the embodiment of the utility model;

[0019] Figure 3 It is a voltage standing wave ratio parameter diagram of the antenna provided by the embodiment of the utility model;

[0020] Figure 4 It is a Smith circularity parameter diagram of the antenna provided by the embodiment of the utility model;

[0021] Figure 5 is an efficiency parameter diagram of the antenna provided by the embodiment of the utility model;

[0022] Figure 6 This is an efficiency table of the antenna provided by the embodiment of the utility model.

[0023] Description of reference numerals:

[0024] 1 flexible circuit board, 11 feeding pad, 12 ground feeding pad, 13 notch, 21 first radiation branch, 211 first radiation part, 212 second radiation part, 22 first connection branch, 221 first connection part, 222 second connection part, 23 second radiation branch, 24 second connection branch, 241 third connection part, 242 fourth connection part, 243 fifth connection part, 25 third radiation branch, 26 accommodation groove, 27 gap. DETAILED DESCRIPTION

[0025] In order to facilitate the understanding of the utility model, the utility model is described in more detail below in conjunction with the accompanying drawings and specific embodiments. It should be noted that when an element is described as "fixed to" another element, it can be directly on another element or there can be one or more centered elements therebetween. When an element is described as "connected" to another element, it can be directly connected to another element or there can be one or more centered elements therebetween. The orientation or positional relationship indicated by the terms "upper", "lower", "inner", "outer", "vertical", "horizontal", etc. used in this specification is based on the orientation or positional relationship shown in the accompanying drawings, only for the convenience of describing the utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the utility model. In addition, the terms "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0026] Unless otherwise defined, all technical and scientific terms used in this specification have the same meaning as those commonly understood by technicians in the technical field of the present invention. The terms used in this specification are only for the purpose of describing specific embodiments and are not used to limit the present invention. The term "and / or" used in this specification includes any and all combinations of one or more related listed items.

[0027] See also Figure 1 The utility model provides an embodiment of an antenna, which includes a flexible circuit board 1 and an antenna body.

[0028] For the above-mentioned flexible circuit board 1 and antenna body, please refer to Figure 1The flexible circuit board 1 is provided with a feeding pad 11 and a ground feeding pad 12, and the feeding pad 11 and the ground feeding pad 12 are arranged at intervals. The antenna body includes a first radiation branch 21, a first connecting branch 22, a second radiation branch 23, a second connecting branch 24 and a third radiation branch 25. The first radiation branch 21, the first connecting branch 22, the second radiation branch 23, the second connecting branch 24 and the third radiation branch 25 are all embedded in the flexible circuit board 1, and the first radiation branch 21, the first connecting branch 22, the second radiation branch 23, the second connecting branch 24 and the third radiation branch 25 are connected end to end in sequence, and the feeding pad 11 and the ground feeding pad 12 are both connected to the first connecting branch 22.

[0029] Among them, the flexible circuit board 1 has a fixed thickness, the feed pad 11 and the ground feed pad 12 are fixed on the surface of the flexible circuit board 1, and the feed pad 11 and the ground feed pad 12 at least partially extend into the flexible circuit board 1, the antenna body is embedded in the flexible circuit board 1, the first radiation branch 21, the first connecting branch 22, the second radiation branch 23, the second connecting branch 24 and the third radiation branch 25 are sequentially arranged end to end and fixed in the flexible circuit board 1, the feed pad 11 and the ground feed pad 12 are connected to the first connecting branch 22 to achieve conduction with the entire antenna body, and the antenna body adopts PI The FA form, that is, the antenna body adopts the structural design of a planar inverted F antenna, the first radiating branch 21, the first connecting branch 22, the second radiating branch 23, the second connecting branch 24 and the third radiating branch 25 are all planar metals and are in an "F" shape as a whole, which can make the structure of the first radiating branch 21, the first connecting branch 22, the second radiating branch 23, the second connecting branch 24 and the third radiating branch 25 compact, which is conducive to the miniaturization of the antenna body, and then to the overall miniaturization of the antenna.

[0030] Further, for the above antenna body, in order to reduce the interaction between different radiating branches, thereby reducing the coupling effect, thereby improving the overall efficiency and transmission performance of the antenna, please refer to Figure 1 The flexible circuit board 1 is also provided with a notch 13, which divides the flexible circuit board 1 into a first part and a second part. The feeding pad 11 and the ground feeding pad 12 are located in the first part, the first radiation branch 21 and the first connecting branch 22 are located in the first part, the second radiation branch 23 extends from the first part to the second part, and the second connecting branch 24 and the third radiation branch 25 are located in the second part.

[0031] Specifically, the flexible circuit board 1 has a plurality of side edges connected end to end. The flexible circuit board 1 takes the side edge close to the third radiation branch 25, the feed pad 11 and the ground feed pad 12 as the starting point, and hollows out and extends toward the inside of the flexible circuit board 1 in a direction perpendicular to the side edge to form a notch 13, so that the third radiation branch 25 is physically separated from the feed pad 11 and the ground feed pad 12, respectively. At the same time, based on the third radiation branch 25 being away from the second radiation branch 23 and the first radiation branch 21, the third radiation branch 25 can be placed in a better clearance environment. When the third radiation branch 25 is in a better clearance environment, the loss or influence caused by interference to the third radiation branch 25 can be reduced, so that its radiation efficiency can be maximized, which helps to improve the overall efficiency and transmission performance of the antenna body. In addition, due to the presence of the notch 13, the interaction between different radiation branches is reduced, so that the radiation efficiency of the second radiation branch 23 and the first radiation branch 21 can be optimized at the same time, which helps to further improve the overall efficiency and transmission performance of the antenna.

[0032] In addition, the radiation electrical length of the antenna body is 1 / 4 wavelength of the Bluetooth frequency band, so that the antenna as a whole can cover the frequency band required by the Bluetooth communication antenna.

[0033] Further, for the first radiation branch 21, in order to improve the radiation efficiency of the first radiation branch 21, please refer to Figure 1 The first radiation branch 21 includes a first radiation portion 211 and a second radiation portion 212, one end of the first radiation portion 211 is connected to the first connection branch 22, the other end of the first radiation portion 211 is connected to the second radiation portion 212, and the first radiation portion 211 is perpendicular to the second radiation portion 212. By setting the first radiation portion 211 and the second radiation portion 212 perpendicular to each other, the length of the first radiation branch 21 can be increased within a limited space, thereby improving the radiation efficiency of the first radiation branch 21, thereby improving the efficiency of the antenna. In addition, by increasing the length of the first radiation branch 21, its operating frequency band range can also be expanded so that it can cover a wider range of signal frequencies, which is conducive to enhancing the applicability and flexibility of the antenna.

[0034] Further, for the first connecting branch 22, please refer to Figure 1 The first connecting branch 22 includes a first connecting portion 221 and a second connecting portion 222, one end of the first connecting portion 221 is vertically connected to the first radiating portion 211, and one end of the first connecting portion 221 is connected to the feed and ground pads 12, the other end of the first connecting portion 221 is vertically connected to the second connecting portion 222, and the other end of the first connecting portion 221 is connected to the feed pad 11.

[0035] Specifically, the direction in which the length of the first connecting portion 221 extends is the same as the direction in which the length of the second radiating portion 212 extends, and the direction in which the length of the second connecting portion 222 extends is the same as the direction in which the length of the first radiating portion 211 extends. By setting the above-mentioned same length extension direction, it can help to make the structure of the first radiating branch 21 and the first connecting branch 22 compact, reduce the overall size of the first radiating branch 21 and the first connecting branch 22, and contribute to the miniaturization of the antenna.

[0036] Also, see Figure 1 , the area of ​​the first connection portion 221 is greater than the sum of the areas of the feed pad 11 and the ground feed pad 12. In the above manner, the contact areas of the first connection portion 221 with the feed pad 11 and the ground feed pad 12 can be increased, thereby improving the contact stability of the first connection portion 221 with the feed pad 11 and the ground feed pad 12, which is beneficial to maintaining stable transmission of the antenna during use.

[0037] Further, for the above-mentioned second radiation branch 23, please refer to Figure 1 , the second radiation branch 23 is connected to one end of the second connection portion 222 away from the first connection portion 221, the first connection portion 221, the second connection portion 222 and the second radiation branch 23 are enclosed together to form a receiving groove 26, and the first radiation branch 21 is arranged in the receiving groove 26. In addition, the second radiation branch 23 and the third radiation branch 25 are arranged in parallel and spaced apart and form a gap 27, the gap 27 is spaced apart from the receiving groove 26, and the second connection branch 24 is arranged in the gap 27. Through the above manner, the structures of the first radiation branch 21, the first connection branch 22, the second radiation branch 23, the second connection branch 24 and the third radiation branch 25 can be made more compact, which is conducive to the miniaturization of the antenna.

[0038] Further, for the second connecting branch 24, please refer to Figure 1 The second connecting branch 24 includes a third connecting part 241, a fourth connecting part 242 and a fifth connecting part 243. The third connecting part 241, the fourth connecting part 242 and the fifth connecting part 243 are vertically connected end to end in sequence. The end of the third connecting part 241 away from the fourth connecting part 242 is vertically connected to the second radiating branch 23, and the end of the fifth connecting part 243 away from the fourth connecting part 242 is vertically connected to the third radiating branch 25, so that the second connecting branch 24 is arranged in a "Z" shape as a whole, which can make the structure of the second connecting branch 24 compact and reduce its size. It can also increase the length of the second connecting branch 24 in a limited space, thereby improving the efficiency and transmission performance of the antenna.

[0039] In order to make it easier for readers to understand the concept of the utility model, the following experimental verification is carried out:

[0040] See also Figure 2, shown in the figure is a return loss parameter diagram of the antenna in the embodiment of the utility model. The utility model inventor has found through demonstration that when the return loss of the antenna is less than -5dB, the antenna has a good ability to radiate signals. It can be seen from the figure that the return loss of the antenna in the frequency range of 2.4GHz to 2.5GHz is less than -8dB or -9dB. Therefore, the antenna has good radiation efficiency in the frequency range of 2.4GHz to 2.5GHz.

[0041] See also Figure 3 , shown in the figure is a voltage standing wave ratio parameter diagram of the antenna in the embodiment of the utility model. The utility model inventor has found through demonstration that when the voltage standing wave ratio of the antenna is less than 3dB, the antenna has good matching performance, and most of the emitted energy can be effectively transmitted to the transmission medium without being reflected back to the antenna. It can be seen from the figure that the voltage standing wave ratio of the antenna in the frequency range of 2.4GHz to 2.5GHz is less than 2.3dB. Therefore, the antenna has good matching performance in the frequency range of 2.4GHz to 2.5GHz, which can reduce losses and improve efficiency.

[0042] See also Figure 4 , shown in the figure is the Smith circularity parameter diagram of the antenna in the embodiment of the utility model. It can be seen from the figure that the antenna has good radiation efficiency in the frequency range of 2.4GHz to 2.5GHz.

[0043] See also Figure 5 and Figure 6 , Figure 5 The figure shows the efficiency parameter diagram of three experimental samples of the antenna in the embodiment of the utility model. Figure 6 Shown in the table are three experimental sample efficiency diagrams of the antenna in the embodiment of the utility model. The inventor has found through demonstration that when the efficiency of the antenna is greater than 30% and the efficiency fluctuation is less than 3%, the antenna has a good ability to radiate signals. It can be seen from the figure that the efficiency of the three experimental samples of the antenna in the frequency range of 2.4GHz to 2.5GHz is greater than 30%, and the efficiency fluctuation is less than 3%. Therefore, the antenna has good radiation efficiency in the frequency range of 2.4GHz to 2.5GHz. At the same time, it can also be explained that the antenna in the embodiment of the utility model has good consistency.

[0044] The embodiment of the utility model includes a flexible circuit board 1 and an antenna body, the flexible circuit board 1 is provided with a feeding pad 11 and a ground feeding pad 12, the feeding pad 11 and the ground feeding pad 12 are arranged at intervals, the antenna body includes a first radiation branch 21, a first connection branch 22, a second radiation branch 23, a second connection branch 24 and a third radiation branch 25, the first radiation branch 21, the first connection branch 22, the second radiation branch 23, the second connection branch 24 and the third radiation branch 25 are all embedded in the flexible circuit board 1, and the first radiation branch 21, the first connection branch 22, the second radiation branch 23, the second connection branch 24 and the third radiation branch 25 are connected end to end in sequence, and the feeding pad 11 and the ground feeding pad 12 are both connected to the first connection branch 22. In the above manner, the flexible circuit board 1 of the embodiment of the utility model can be deformed in any direction, and then the antenna body can follow the deformation of the flexible circuit board 1, thereby avoiding the cable passing through the transmission area of ​​the antenna body, so as to reduce the interference of the antenna body and affect its performance, and improve the efficiency of the antenna body. In addition, the antenna of the embodiment of the utility model can utilize the bending characteristics of the flexible circuit board 1, which is effective in the internal space of different machines (for example: mobile phones, tablets or charging piles, etc.), and can be adjusted to reach the frequency band required by the user. It has wide applicability. Moreover, the antenna of the embodiment of the utility model can utilize the bending characteristics of the flexible circuit board 1 to realize a shared mold, and there is no need to re-open the mold, thereby effectively saving costs.

[0045] The utility model further provides an embodiment of an electronic device, and the electronic device includes the above antenna. The specific structure and function of the above antenna can be referred to the above embodiment, which will not be described in detail here.

[0046] The above description is only an embodiment of the present invention, and does not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made by using the contents of the specification and drawings of the present invention, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. An antenna, characterized in that: include: A flexible circuit board is provided with a feeding pad and a ground feeding pad, wherein the feeding pad and the ground feeding pad are arranged at intervals; The antenna body includes a first radiating branch, a first connecting branch, a second radiating branch, a second connecting branch and a third radiating branch. The first radiating branch, the first connecting branch, the second radiating branch, the second connecting branch and the third radiating branch are all embedded in the flexible circuit board, and the first radiating branch, the first connecting branch, the second radiating branch, the second connecting branch and the third radiating branch are connected end to end in sequence, and the feeding pad and the ground feeding pad are both connected to the first connecting branch.

2. The antenna according to claim 1, characterized in that The flexible circuit board is also provided with a notch, which divides the flexible circuit board into a first part and a second part, the feeding pad and the ground feeding pad are located in the first part, the first radiation branch and the first connecting branch are located in the first part, the second radiation branch extends from the first part to the second part, and the second connecting branch and the third radiation branch are located in the second part.

3. The antenna according to claim 1, characterized in that The first radiating branch includes a first radiating portion and a second radiating portion, one end of the first radiating portion is connected to the first connecting branch, the other end of the first radiating portion is connected to the second radiating portion, and the first radiating portion is perpendicular to the second radiating portion.

4. The antenna according to claim 3, characterized in that: The first connecting branch includes a first connecting portion and a second connecting portion, one end of the first connecting portion is vertically connected to the first radiating portion, and one end of the first connecting portion is connected to the ground feeding pad, the other end of the first connecting portion is vertically connected to the second connecting portion, and the other end of the first connecting portion is connected to the power feeding pad.

5. The antenna according to claim 4, characterized in that: The area of ​​the first connection portion is greater than the sum of the areas of the power feeding pad and the ground feeding pad.

6. The antenna according to claim 4, characterized in that: The second radiation branch is connected to an end of the second connection portion away from the first connection portion. The first connection portion, the second connection portion and the second radiation branch are jointly surrounded to form a receiving groove. The first radiation branch is arranged in the receiving groove.

7. The antenna according to claim 6, characterized in that The second radiation branch and the third radiation branch are arranged in parallel and spaced apart to form a gap, the gap is spaced apart from the receiving groove, and the second connection branch is arranged in the gap.

8. The antenna according to claim 7, characterized in that: The second connecting branch node includes a third connecting portion, a fourth connecting portion and a fifth connecting portion, and the third connecting portion, the fourth connecting portion and the fifth connecting portion are vertically connected end to end in sequence, an end of the third connecting portion away from the fourth connecting portion is vertically connected to the second radiating branch node, and an end of the fifth connecting portion away from the fourth connecting portion is vertically connected to the third radiating branch node.

9. The antenna according to claim 1, characterized in that: The radiation electrical length of the antenna body is 1 / 4 wavelength of the Bluetooth frequency band.

10. An electronic device, characterized in that: Comprising the antenna according to any one of claims 1-9.

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