Miniaturized antenna structure and mobile terminal

Abstract

The utility model discloses a miniaturized antenna structure. The miniaturized antenna structure comprises a substrate; the pair of first radiation metal sheets are symmetrically arranged on the first surface relative to the symmetric axis; the pair of first radiation arms are symmetrically arranged on the first surface relative to the symmetric axis; the second radiation arms are symmetrically arranged on the first surface relative to the symmetry axis, one ends of the second radiation arms are connected with the first radiation arms on the corresponding sides, and the other ends extend in the extension direction of the symmetry axis; the concentric-square-shaped connecting arm is connected with the pair of second radiation arms; the second radiation metal sheet is arranged on the second surface and is overlapped with the first radiation metal sheet on one side in orthographic projection; and the third radiation metal sheet is arranged on the second surface, one end of the third radiation metal sheet covers the orthographic projection of the first radiation metal sheet on the other side on the second surface, and the other end of the third radiation metal sheet extends towards the second radiation metal sheet. According to the miniaturized antenna structure, the antenna size can be greatly reduced on the premise that the efficiency is not affected, and the requirement for the antenna function in a small space is met.

Description

Technical Field

[0001] This application belongs to the field of antenna technology, and particularly relates to a miniaturized antenna structure and a mobile terminal. Background Art

[0002] WiFi 6E (also known as 802.11ax) is a new wireless local area network standard designed to provide higher speeds and lower latency. WiFi 6E operates in the 5GHz and 6GHz frequency bands, allowing for more channels and wider bandwidths, thus providing higher data transmission capabilities and lower network congestion.

[0003] Currently, a conventional WiFi 6E antenna structure is as Figure 1 shown. Its antenna size is about 28*22mm, and the antenna clearance area is about 40*40mm, occupying a relatively large size and having high space requirements, making it inapplicable in some mobile terminals. Summary of the Invention

[0004] The purpose of this application is to provide a miniaturized antenna structure to solve the technical problem in the prior art that the size of a conventional WiFi6E antenna is about 28*22mm, occupying a relatively large size and having high space requirements, making it inapplicable in some mobile terminals.

[0005] To achieve the above purpose, a technical solution adopted in this application is:

[0006] Provide a miniaturized antenna structure, including:

[0007] A substrate, including a first surface and a second surface disposed opposite to each other;

[0008] A pair of first radiation metal sheets, symmetrically arranged relative to the axis of symmetry on the first surface;

[0009] A pair of first radiation arms, symmetrically arranged relative to the axis of symmetry on the first surface, one end of the first radiation arm is connected to the corresponding first radiation metal sheet on the same side, and the other end extends to the side of the axis of symmetry;

[0010] A pair of second radiation arms, symmetrically arranged relative to the axis of symmetry on the first surface, one end of the second radiation arm is connected to the corresponding first radiation arm on the same side, and the other end extends along the extension direction of the axis of symmetry;

[0011] A loop connection arm, arranged between the pair of second radiation arms, and the loop connection arm connects the pair of second radiation arms;

[0012] The second radiating metal sheet is arranged on the second surface. The positive projection of the second radiating metal sheet on the second surface overlaps with the first radiating metal sheet on one side. The second radiating metal sheet is connected to the corresponding first radiating metal sheet through a first wire passing hole penetrating through the substrate, and a feeding point is provided on the second radiating metal sheet.

[0013] The third radiating metal sheet is arranged on the second surface at an interval from the second radiating metal sheet. One end of the third radiating metal sheet covers the positive projection of the first radiating metal sheet on the other side on the second surface, and the other end extends towards the second radiating metal sheet. The third radiating metal sheet is connected to the corresponding first radiating metal sheet through a second wire passing hole penetrating through the substrate.

[0014] In one or more embodiments, the first radiating arm and the second radiating arm have at least one bend.

[0015] In one or more embodiments, the first radiating arm includes a first branch. The first branch is located at the end of the first radiating arm close to the axis of symmetry, and the first branch is arranged parallel to the axis of symmetry.

[0016] In one or more embodiments, the first radiating arm includes a first bending portion. The first bending portion extends along a direction parallel to the axis of symmetry, and the extending length of the first bending portion is the same as the extending length of the first branch.

[0017] In one or more embodiments, the second radiating arm includes a second branch. The second branch is located at one end of the second radiating arm away from the loop-shaped connecting arm. The second branch is arranged parallel and spaced from the first branch, and the second branch is arranged crosswise with the first radiating arm.

[0018] In one or more embodiments, the second radiating arm includes a third branch. The third branch is located at one end of the second radiating arm away from the first radiating arm. The third branch is arranged perpendicular to the first branch, and the third branch is located within the space enclosed by the loop-shaped connecting arm.

[0019] In one or more embodiments, the second radiating arm includes a second bending portion. The second bending portion extends along a direction perpendicular to the axis of symmetry towards the side away from the axis of symmetry.

[0020] In one or more embodiments, the loop-shaped connecting arm includes:

[0021] A loop-shaped line, which is symmetrically arranged with respect to the axis of symmetry. The loop-shaped line includes an opening, and the loop-shaped line is arranged crosswise with the pair of second radiating arms.

[0022] A pair of fourth branches are symmetrically arranged at the two open ends of the meander line with respect to the symmetry axis, and the fourth branches are arranged in parallel and spaced apart from the symmetry axis.

[0023] In one or more embodiments, a protective layer is further included. The protective layer is arranged on the first surface and the second surface and covers the first radiating metal sheet, the first radiating arm, the second radiating arm, the meander connecting arm, the second radiating metal sheet, and the third radiating metal sheet.

[0024] To achieve the above object, another technical solution adopted by this application is:

[0025] A mobile terminal is provided, including the miniaturized antenna structure described in any of the above embodiments.

[0026] Different from the prior art, the beneficial effects of this application are:

[0027] The miniaturized antenna structure of this application has an antenna efficiency equivalent to that of a conventional WiFi6E antenna in the frequency bands of 5.15 - 5.85 GHz and 5.925 - 7.125 GHz, and its efficiency at 2.4 - 2.5 GHz is significantly better than that of a conventional WiFi6E antenna. Moreover, it can significantly reduce the size of the antenna and can be applied to mobile terminals with small spaces such as mobile phones and watches. Description of the Drawings

[0028] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments recorded in the present invention. For those of ordinary skill in the art, other drawings can also be obtained based on these drawings without creative efforts.

[0029] Figure 1 is a schematic structural diagram of a conventional WiFi6E antenna;

[0030] Figure 2 is a cross-sectional structural schematic diagram of an embodiment of the miniaturized antenna structure of this application;

[0031] Figure 3 is a schematic diagram of a wiring structure of the first surface of the substrate of this application in one embodiment;

[0032] Figure 4 is a schematic diagram of a wiring structure of the second surface of the substrate of this application in one embodiment;

[0033] Figure 5 is a diagram comparing the efficiencies of the miniaturized antenna structure of this application and a conventional WiFi6E antenna.

[0034] Reference numerals:

[0035] Substrate 10; first surface 101; second surface 102; first wire through hole 103; second wire through hole 104;

[0036] First wiring layer 20;

[0037] First protective layer 30;

[0038] Second wiring layer 40;

[0039] Second protective layer 50;

[0040] First radiation metal sheet 100;

[0041] First radiation arm 200; first stub 201; first bending portion 202;

[0042] Second radiation arm 300; second stub 301; third stub 302; second bending portion 303;

[0043] Loop connection arm 400; loop wire 401; opening 402; fourth stub 403;

[0044] Second radiation metal sheet 500; feeding point 501;

[0045] Third radiation metal sheet 600. Detailed implementation manners

[0046] In order to enable those skilled in the art to better understand the technical solutions in this application, the technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of this application. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments in this application, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the scope of protection of this application.

[0047] Please refer to Figure 1 , Figure 1 which Figure 1 is a schematic structural diagram of a conventional WiFi6E antenna. As

[0048] shown, the size of a conventional WiFi6E antenna is about 28*22 mm, which has high space requirements. In mobile terminals such as watches and mobile phones, these WiFi6E antennas that occupy a large space are not applicable.

[0049] Specifically, please refer to Figure 2 ,Figure 2 It is a schematic cross-sectional structure diagram of an embodiment of the miniaturized antenna structure of the present application.

[0050] As Figure 2 shown, the miniaturized antenna structure includes a substrate 10, and the substrate 10 includes a first surface 101 and a second surface 102 arranged opposite to each other. A first wiring layer 20 and a first protective layer 30 are sequentially arranged on the first surface 101; a second wiring layer 40 and a second protective layer 50 are sequentially arranged on the second surface 102.

[0051] Among them, the substrate 10 can be a PCB board. In this embodiment, the substrate 10 can adopt FR4 material, and the thickness of the substrate 10 can be 1950 μm.

[0052] The first protective layer 30 and the second protective layer 50 can be a green ink layer, an OSP layer, etc., to protect the antenna from corrosion, which will not be elaborated here. The thicknesses of the first protective layer 30 and the second protective layer 50 can be 30 μm.

[0053] The structures of the first wiring layer 20 and the second wiring layer 40 of the present application will be introduced in detail below. Please refer to Figure 3 and Figure 4 , Figure 3 which is a schematic diagram of an embodiment of the wiring structure of the first surface 101 of the substrate 10 of the present application, Figure 4 which is a schematic diagram of an embodiment of the wiring structure of the second surface 102 of the substrate 10 of the present application.

[0054] As Figure 3 shown, in this embodiment, the length of the substrate 10 can be 7 mm, and the width can be 3 mm.

[0055] A pair of first radiation metal sheets 100, a pair of first radiation arms 200, a pair of second radiation arms 300, and a loop connection arm 400 are arranged on the first surface 101.

[0056] A pair of first radiation metal sheets 100 are symmetrically arranged on the first surface 101 with respect to the symmetry axis x. In this embodiment, the first radiation metal sheet 100 can be a rectangular metal sheet. In one embodiment, the length of the first radiation metal sheet 100 can be twice the width. Exemplarily, the width of the first radiation metal sheet 100 can be 1.11 mm, and the length can be 2.21 mm.

[0057] A pair of first radiation arms 200 are symmetrically arranged on the first surface 101 with respect to the symmetry axis x. One end of the first radiation arm 200 is connected to the corresponding first radiation metal sheet 100 on the same side, and the other end extends to the side of the symmetry axis x.

[0058] A pair of second radiation arms 300 are symmetrically arranged on the first surface 101 with respect to the symmetry axis x. One end of the second radiation arm 300 is connected to the corresponding first radiation arm 200 on the corresponding side, and the other end extends along the extending direction of the symmetry axis x.

[0059] The loop-shaped connecting arm 400 is arranged between the pair of second radiation arms 300, and the loop-shaped connecting arm 400 connects the pair of second radiation arms 300.

[0060] In order to further improve the space utilization rate and antenna efficiency, the first radiation arm 200 includes a first branch 201 and a first bending portion 202. The first branch 201 is located at the end of the first radiation arm 200 close to the symmetry axis x, and the first branch 201 is arranged parallel to the symmetry axis x; the first bending portion 202 extends along a direction parallel to the symmetry axis x, and the extending length of the first bending portion 202 is the same as the extending length of the first branch 201.

[0061] Furthermore, the second radiation arm 300 includes a second branch 301, a third branch 302, and a second bending portion 303. The second branch 301 is located at one end of the second radiation arm 300 facing away from the loop-shaped connecting arm 400. The second branch 301 is arranged parallel and spaced apart from the first branch 201, and the second branch 301 intersects with the first radiation arm 200.

[0062] Specifically, in this embodiment, the distance between the first branch 201 and the second branch 301 can be 0.12 mm, and the distance between the second branch 301 and the first bending portion 202 can be 0.40 mm.

[0063] The third branch 302 is located at one end of the second radiation arm 300 facing away from the first radiation arm 200. The third branch 302 is arranged perpendicular to the first branch 201, and the third branch 302 is located within the space surrounded by the loop-shaped connecting arm 400.

[0064] The second bending portion 303 extends along a direction perpendicular to the symmetry axis x towards the side away from the symmetry axis x. In one embodiment, in order to effectively improve the space utilization rate, the second bending portion 303 can extend to the corresponding position of the end of the loop-shaped connecting arm 400.

[0065] It should be noted that in this embodiment, both the first radiation arm 200 and the second radiation arm 300 include a bending structure. In other embodiments, the first radiation arm 200 and the second radiation arm 300 can also include other numbers of bending structures, such as 2 or 3, which can be set based on actual needs.

[0066] The loop-shaped connecting arm 400 includes a loop-shaped wire 401 and a pair of fourth branches 402. The loop-shaped wire 401 is symmetrically arranged with respect to the symmetry axis x. The loop-shaped wire 401 includes an opening, and the loop-shaped wire 401 intersects with the pair of second radiation arms 300.

[0067] A pair of fourth branches 402 are symmetrically arranged at both ends of the opening of the meander line 401 with respect to the symmetry axis x, and the fourth branches 402 are arranged in parallel at intervals with respect to the symmetry axis x; in order to improve the space utilization rate, the fourth branches 402 can extend to the position of the third branches 302.

[0068] As Figure 4 shown, the second surface 102 is provided with a second radiation metal sheet 500 and a third radiation metal sheet 600. The second radiation metal sheet 500 is arranged on the second surface 102, and the second radiation metal sheet 500 overlaps with the positive projection of one side of the first radiation metal sheet 100 on the second surface 102. The second radiation metal sheet 500 is connected to the corresponding first radiation metal sheet 100 through the first wire passing hole 103 passing through the substrate 10, and a feeding point 501 is provided on the second radiation metal sheet 500.

[0069] The third radiation metal sheet 600 and the second radiation metal sheet 500 are arranged at intervals on the second surface 102. One end of the third radiation metal sheet 600 covers the positive projection of the other side of the first radiation metal sheet 100 on the second surface 102, and the other end extends towards the second radiation metal sheet 500. The third radiation metal sheet 600 is connected to the corresponding first radiation metal sheet 100 through the second wire passing hole 104 passing through the substrate 10.

[0070] In this embodiment, the width of the third radiation metal sheet 600 can be 2.20 mm, the length of the third radiation metal sheet 600 can be 3.60 mm, and the distance between the second radiation metal sheet 500 and the third radiation metal sheet 600 can be 1.50 mm.

[0071] Based on the WiFi6E antenna of the above embodiment, the antenna size can be greatly reduced without affecting the efficiency, meeting the requirements of the antenna function in a relatively small space. Next, Figure 1 the antenna efficiency tests are carried out on the conventional WiFi6E antenna shown and the miniaturized antenna structure of the present application, and Figure 5 , Figure 5 is the efficiency comparison diagram between the miniaturized antenna structure of the present application and the conventional WiFi6E antenna.

[0072] Based on the above efficiency comparison, the parameter comparison table of the miniaturized antenna structure of the present application and the conventional WiFi6E antenna shown in the following table can be obtained.

[0073]

[0074] As shown in the above table, the miniaturized antenna structure of the present application has an antenna efficiency equivalent to that of a conventional WiFi6E antenna in the frequency bands of 5.15 - 5.85 GHz and 5.925 - 7.125 GHz, and its efficiency at 2.4 - 2.5 GHz is significantly better than that of a conventional WiFi6E antenna. Moreover, it can significantly reduce the size of the antenna and can be applied to mobile terminals with a small space such as mobile phones and watches.

[0075] The present application also provides a mobile terminal including the miniaturized antenna structure of each of the above embodiments. The mobile terminal may include, but is not limited to: personal computers, server computers, workstations, desktop computers, laptop computers, notebook computers, mobile electronic devices, smart phones, tablet computers, cellular phones, personal digital assistants (PDAs), handheld devices, messaging devices, wearable electronic devices, consumer electronic devices, and so on.

[0076] For those skilled in the art, it is obvious that the present invention is not limited to the details of the above exemplary embodiments, and without departing from the spirit or basic characteristics of the present invention, the present invention can be implemented in other specific forms. Therefore, from any point of view, the embodiments should be regarded as exemplary and non - restrictive. The scope of the present invention is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the present invention. Any reference signs in the claims should not be regarded as limiting the claimed claim.

[0077] In addition, it should be understood that although this specification is described according to embodiments, not every embodiment only contains an independent technical solution. This narrative way of the specification is only for clarity. Those skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A miniaturized antenna structure, characterized in that, Comprising: A substrate (10), including a first surface (101) and a second surface (102) arranged opposite to each other; A pair of first radiation metal sheets (100), symmetrically arranged on the first surface (101) with respect to the symmetry axis x; A pair of first radiation arms (200), symmetrically arranged on the first surface (101) with respect to the symmetry axis x. One end of the first radiation arm (200) is connected to the corresponding first radiation metal sheet (100), and the other end extends to the side of the symmetry axis x; A pair of second radiation arms (300), symmetrically arranged on the first surface (101) with respect to the symmetry axis x. One end of the second radiation arm (300) is connected to the corresponding first radiation arm (200), and the other end extends along the extending direction of the symmetry axis x; A loop-shaped connecting arm (400), arranged between the pair of second radiation arms (300), and the loop-shaped connecting arm (400) connects the pair of second radiation arms (300); A second radiation metal sheet (500), arranged on the second surface (102). The second radiation metal sheet (500) overlaps with the orthographic projection of one side of the first radiation metal sheet (100) on the second surface (102). The second radiation metal sheet (500) is connected to the corresponding first radiation metal sheet (100) through a first via hole (103) passing through the substrate (10). A feeding point (501) is provided on the second radiation metal sheet (500); A third radiation metal sheet (600), arranged on the second surface (102) at an interval from the second radiation metal sheet (500). One end of the third radiation metal sheet (600) covers the orthographic projection of the other side of the first radiation metal sheet (100) on the second surface (102), and the other end extends towards the second radiation metal sheet (500). The third radiation metal sheet (600) is connected to the corresponding first radiation metal sheet (100) through a second via hole (104) passing through the substrate (10).

2. The miniaturized antenna structure according to claim 1, characterized in that, The first radiation arm (200) and the second radiation arm (300) have at least one bend.

3. The miniaturized antenna structure according to claim 2, wherein The first radiation arm (200) includes a first branch (201). The first branch (201) is located at the end of the first radiation arm (200) close to the symmetry axis x, and the first branch (201) is arranged parallel to the symmetry axis x.

4. The miniaturized antenna structure according to claim 3, characterized in that, The first radiation arm (200) includes a first bending portion (202). The first bending portion (202) extends along a direction parallel to the symmetry axis x, and the extending length of the first bending portion (202) is the same as the extending length of the first branch (201).

5. The miniaturized antenna structure according to claim 3, characterized in that, The second radiation arm (300) includes a second stub (301). The second stub (301) is located at one end of the second radiation arm (300) away from the loop connection arm (400). The second stub (301) is arranged parallel and spaced apart from the first stub (201), and the second stub (301) is arranged to cross the first radiation arm (200).

6. The miniaturized antenna structure according to claim 5, characterized in that, The second radiation arm (300) includes a third stub (302). The third stub (302) is located at one end of the second radiation arm (300) away from the first radiation arm (200). The third stub (302) is arranged perpendicular to the first stub (201), and the third stub (302) is located within the space formed by the loop connection arm (400).

7. The miniaturized antenna structure according to claim 2, characterized in that, The second radiation arm (300) includes a second bending portion (303). The second bending portion (303) extends along a direction perpendicular to the symmetry axis x towards the side away from the symmetry axis x.

8. The miniaturized antenna structure according to claim 1, characterized in that, The loop connection arm (400) includes: A loop line (401), which is symmetrically arranged with respect to the symmetry axis x. The loop line (401) includes an opening, and the loop line (401) is arranged to cross the pair of second radiation arms (300). A pair of fourth stubs (402), which are symmetrically arranged at both ends of the opening of the loop line (401) with respect to the symmetry axis x. The fourth stubs (402) are arranged parallel and spaced apart from the symmetry axis x.

9. The miniaturized antenna structure according to any one of claims 1 to 8, characterized in that, It further includes a protective layer, which is arranged on the first surface (101) and the second surface (102), and covers the first radiation metal sheet (100), the first radiation arm (200), the second radiation arm (300), the loop connection arm (400), the second radiation metal sheet (500), and the third radiation metal sheet (600).

10. A mobile terminal, characterized in that, It includes the miniaturized antenna structure according to any one of claims 1 to 9.

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