Multi-branch coupling antenna for mobile device and mobile device

Abstract

The utility model provides a multi-branch coupling antenna of a mobile device and a mobile device, wherein the multi-branch coupling antenna comprises a feeding end, a grounding end, a first radiating arm and a second radiating arm; one end of the first radiating arm is connected to the feeding end, and the other end is extended in a direction away from the feeding end, and the first radiating arm is used to generate intermediate frequency resonance; the second radiating arm comprises a first branch and a second branch extending from a grounding point; the first branch extends from the grounding end in a direction close to the first radiating arm, and forms a first gap with the first radiating arm, and the first branch forms a parasitic coupling with the first radiating arm through the first gap and generates intermediate frequency resonance; the second branch extends from the grounding point in a direction away from the first branch, and the second branch forms a parasitic coupling with the first radiating arm and generates high frequency resonance. The utility model generates intermediate frequency resonance and high frequency resonance while reducing the size of the antenna, increases the bandwidth of the intermediate and high frequency bands, has strong directivity, and is conducive to improving antenna efficiency.

Description

Technical Field

[0001] The utility model belongs to the technical field of mobile equipment, and in particular relates to a multi-branch coupling antenna for mobile equipment and the mobile equipment. Background Art

[0002] Currently, there are more and more electrical components inside 5G smartphones on the market, leaving less and less space for antennas. However, the functional requirements for antennas are increasing, resulting in an increasing number of antennas in smartphones. Smartphones need at least 12 antennas to meet functions such as 5G communication, GPS positioning, and Bluetooth transmission. The antenna layout used in traditional smartphones is to distribute the main high-frequency antenna at the bottom of the smartphone, using the same antenna to achieve low frequency, medium frequency, and high frequency. However, the antenna design of this type is inefficient, highly directional, slow in data transmission, and even consumes a lot of power, which seriously affects the user experience. Utility Model Content

[0003] The purpose of the utility model is to overcome the shortcomings and deficiencies in the prior art and to provide a multi-branch coupled antenna for a mobile device, which generates intermediate frequency resonance and high frequency resonance while reducing the size of the antenna, thereby increasing the bandwidth of the intermediate and high frequency bands. The intermediate frequency and high frequency are set on different antennas, which have strong directivity and are conducive to improving the antenna efficiency.

[0004] The utility model is realized by the following technical solutions:

[0005] A multi-branch coupling antenna for a mobile device, comprising a feeding end, a grounding end, a first radiating arm and a second radiating arm; one end of the first radiating arm is connected to the feeding end, and the other end is extended in a direction away from the feeding end; the second radiating arm comprises a first branch and a second branch extending from the grounding end; the first branch extends from the grounding end in a direction close to the first radiating arm, and forms a first gap with the first radiating arm, and the first branch forms a parasitic coupling with the first radiating arm through the first gap and generates an intermediate frequency resonance; the second branch extends from the grounding end in a direction away from the first branch, and the second branch forms a parasitic coupling with the first radiating arm and generates an intermediate frequency resonance.

[0006] The utility model utilizes a first radiating arm extending from a feeding end to generate intermediate frequency resonance, and couples with the first radiating arm through a first branch and a second branch extending from a grounding end, respectively, thereby generating intermediate frequency resonance and high frequency resonance while reducing the size of the antenna, thereby increasing the bandwidth of the intermediate and high frequency bands, and the intermediate frequency and high frequency are arranged on different antennas, with strong directivity, which is beneficial to improving the antenna efficiency.

[0007] Furthermore, an extension direction of the first branch is parallel to the first radiation arm, and a parallel interval is the first gap.

[0008] Furthermore, the width of the first gap is not greater than 2 mm. The width of the first gap is controlled to achieve parasitic coupling.

[0009] Furthermore, a second gap is formed between the feeding end and the grounding end, and a distance of the second gap is no greater than 22 mm.

[0010] Furthermore, the first radiation arm generates intermediate frequency resonance, and its length is 1 / 4-1 / 2 of the working wavelength; the first branch is coupled with the first radiation arm to generate intermediate frequency resonance of 1710-2170M, and its length is 1 / 4-1 / 2 of the working wavelength; the second branch is coupled with the first radiation arm to generate the same high frequency resonance of 2300-2700M as the first radiation arm, and its length is 1 / 4-1 / 2 of the working wavelength. The lengths of the first radiation arm, the first branch, and the second branch are controlled to improve the antenna efficiency.

[0011] Furthermore, the second branch is in a bent structure. Since the multi-branch coupling antenna is usually installed on a middle frame, it is necessary to avoid other electrical components on the middle frame and reduce the volume occupied by the antenna, so the second branch with a bent structure is conducive to reducing the volume of the antenna and avoiding other electrical components.

[0012] The utility model also provides a mobile device, including a shell, a middle frame, a small board and the above-mentioned multi-branch coupling antenna; the middle frame is installed in the shell; the small board is arranged on one side of the middle frame; the small board is provided with a feeding point and a grounding point; the multi-branch coupling antenna is fixed to the middle frame and arranged close to the bottom of the shell; the feeding end of the multi-branch coupling antenna is electrically connected to the feeding point, and the grounding end of the multi-branch coupling antenna is electrically connected to the grounding point.

[0013] In the mobile device provided by the utility model, the multi-branch coupling antenna is installed on the middle frame and is electrically connected to the small board to realize the antenna function.

[0014] Furthermore, the mobile device further comprises a feeding spring and a grounding spring, the feeding end is connected to the feeding point via the feeding spring, and the grounding end is connected to the grounding point via the grounding spring.

[0015] In order to better understand and implement the present invention, the present invention is described in detail below with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the structure of a multi-branch coupled antenna of a mobile device.

[0017] Figure 2 It is the S11 parameter diagram of the multi-branch coupled antenna of the mobile device.

[0018] Figure 3 is the antenna efficiency diagram of the multi-branch coupled antenna of the mobile device.

[0019] Figure 4 It is a structural diagram of a mobile device. DETAILED DESCRIPTION

[0020] The following is a further detailed description of the embodiments of the utility model in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the embodiments of the utility model, rather than to limit the embodiments of the utility model. It should also be noted that, for ease of description, only parts related to the embodiments of the utility model are shown in the accompanying drawings, rather than all structures.

[0021] In addition, the terms first, second, third, etc. in the specification and claims are only used for the purpose of describing the same technical features, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated, nor necessarily describing the order or time sequence. The terms are interchangeable where appropriate. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the features.

[0022] Similarly, the terms "fixed" and "connected" used in the specification and claims should not be construed as limited to direct connection. Therefore, the expression "device A is connected to device B" should not be limited to a device or system in which device A is directly connected to device B, but means that there is a path between device A and device B, which may be a path including other devices or tools.

[0023] Example 1

[0024] This embodiment provides a multi-branch coupling antenna for a mobile device. Figure 1 This is a schematic diagram of the structure of a multi-branch coupled antenna for a mobile device. Figure 1 The multi-branch coupling antenna of the mobile device includes a feeding terminal 1, a grounding terminal 2, a first radiating arm 3 and a second radiating arm 4; one end of the first radiating arm 3 is connected to the feeding terminal 1, and the other end is extended in a direction away from the feeding terminal 1; the second radiating arm 4 includes a first branch 41 and a second branch 42 extending from the grounding terminal; the first branch 41 extends from the grounding terminal 2 in a direction close to the first radiating arm 3, and forms a first slot 5 with the first radiating arm 3, the first branch 41 and the first radiating arm 3 generate parasitic coupling through the first slot 5 and generate at least one of intermediate frequency resonance and high frequency resonance; the second branch 42 extends from the grounding terminal in a direction away from the first branch 41, the second branch 42 generates parasitic coupling with the first radiating arm 3 and generates at least one of intermediate frequency resonance and high frequency resonance.

[0025] In the multi-branch coupled antenna of this embodiment, the first radiating arm 3 extending from the feeding end 1 is used to generate intermediate frequency resonance, and the first branch 41 and the second branch 42 extending from the grounding end 2 are respectively coupled with the first radiating arm 3, so that intermediate frequency resonance and high frequency resonance are generated while reducing the size of the antenna, thereby increasing the bandwidth of the intermediate and high frequency bands. Moreover, the intermediate frequency and high frequency are set on different antennas, which have strong directivity and are conducive to improving the antenna efficiency.

[0026] In this embodiment, the extension direction of the first branch 41 is parallel to the first radiation arm 3, which is conducive to ensuring the uniformity of parasitic coupling and maintaining the stable operation of the first branch 41. The width of the first slot 5 is not greater than 2 mm, and the width of the first slot 5 is controlled to achieve parasitic coupling, avoiding being too wide to produce parasitic coupling or too narrow to produce resonance in a specified frequency band. The width of the first slot 5 can be adjusted according to the actual resonant frequency band.

[0027] In this embodiment, a second gap 6 is formed between the feeding terminal 1 and the grounding terminal 2, and the distance of the second gap 6 is no greater than 22 mm.

[0028] In this embodiment, the first radiation arm 3 generates intermediate frequency resonance, and its length is 1 / 4-1 / 2 of the working wavelength; the first branch 41 is coupled with the first radiation arm 3 to generate intermediate frequency resonance of 1710-2170M, and its length is 1 / 4-1 / 2 of the working wavelength; the second branch 42 is coupled with the first radiation arm 3 to generate high frequency resonance of 2300-2700M, and its length is 1 / 4-1 / 2 of the working wavelength. The lengths of the first radiation arm 3, the first branch 41, and the second branch 42 are controlled to improve the antenna efficiency.

[0029] In this embodiment, the first radiating arm 3 is led out through the feeding end to realize the standing wave resonance of the intermediate frequency of 1710-2170M, and the standing wave efficiency of 1710-2170M is enhanced by parasitic coupling with the first radiating arm 3 through the first branch 41, and the standing wave resonance of the high frequency band of 2300-2700M is formed by parasitic coupling with the first radiating arm 3 through the second branch 42, thereby realizing the coverage of the intermediate frequency and high frequency without a tuning switch.

[0030] In another embodiment, the first radiation arm 3 generates intermediate frequency resonance, and the first branch 41 forms a parasitic coupling with the first radiation arm 3 to generate intermediate frequency resonance in a frequency band different from that of the first radiation arm 3 .

[0031] In this embodiment, the second branch 42 is in a bent structure. Since the multi-branch coupling antenna is usually installed on the middle frame 8, it is necessary to avoid other electrical components on the middle frame 8 and reduce the volume occupied by the antenna, so the second branch 42 with a bent structure is conducive to reducing the volume of the antenna and avoiding other electrical components.

[0032] Specifically, the first radiating arm 3 is a long monopole antenna, one end of which is connected to the feeding end 1, and the other end extends in a direction away from the feeding end 1; one end of the first branch 41 and one end of the second branch 42 are both connected to the grounding end 2, and the other end of the first branch 41 and the other end of the second branch 42 extend in opposite directions, wherein the first branch 41 extends in a direction close to the feeding end 1 and is parallel to the first radiating arm.

[0033] Figure 2 It is the S11 parameter diagram of the multi-branch coupled antenna of the mobile device. Figure 3 is the antenna efficiency diagram of the multi-branch coupled antenna of the mobile device, please refer to Figure 2-3 The return loss of the 1710-2170M intermediate frequency band generated by the parasitic coupling between the first radiation arm 3 and the first branch 41 is (-10)dB to (-9)dB, and the antenna efficiency is -4.1dB. The 1710-2170M standing wave resonance formed by the first radiation arm 3 and the parasitic coupling between the first branch 41 and the first radiation arm 3 enhance the standing wave efficiency of 1710-2170M. The second branch 42 and the first radiation arm 3 parasitically couple to form a standing wave resonance of the 2300-2700M high frequency band, with a return loss of -7dB and an antenna efficiency of -6.4dB.

[0034] Example 2

[0035] This embodiment provides a mobile device, Figure 4 is a schematic diagram of the structure of a mobile device, see Figure 4 The mobile device includes a shell 7, a middle frame 8, a small board 9 and the multi-branch coupling antenna of Example 1; the middle frame 8 is installed in the shell 7; the small board 9 is arranged on one side of the middle frame 8; the small board 9 is provided with a feeding point and a grounding point; the multi-branch coupling antenna is fixed to the middle frame 8 and is arranged close to the bottom of the shell 7; the feeding end 1 of the multi-branch coupling antenna is electrically connected to the feeding point, and the grounding end 2 of the multi-branch coupling antenna is electrically connected to the grounding point.

[0036] In this embodiment, the mobile device also includes a feeding spring and a grounding spring, the feeding terminal 1 is connected to the feeding point through the feeding spring, and the grounding terminal 2 is connected to the grounding point through the grounding spring. On the basis of retaining the main centralized high-frequency antenna of the existing design distributed at the bottom of the smart phone, the multi-branch coupling antenna described in Example 1 is used, and the first radiating arm 3 is led out through the feeding terminal to realize the standing wave resonance of the intermediate frequency, and the first branch 41 is parasitically coupled with the first radiating arm 3 to enhance the intermediate frequency standing wave efficiency, and the second branch 42 is parasitically coupled with the first radiating arm 3 to form a standing wave resonance in the frequency band, thereby realizing coverage of the intermediate frequency and high frequency without a tuning switch. The feeding point of the small board 9 is connected to the feeding terminal 1 through the feeding spring to realize data transmission, and the grounding point of the small board 9 is connected to the grounding terminal 2 through the grounding spring to realize data transmission.

[0037] The present invention is not limited to the above-mentioned embodiments. If various changes or modifications to the present invention do not depart from the spirit and scope of the present invention, and if these changes and modifications fall within the claims of the present invention and the scope of equivalent technologies, the present invention is also intended to include these changes and modifications.

Claims

1. A multi-branch coupled antenna for a mobile device, characterized in that: It includes a feeding terminal, a ground terminal, a first radiation arm and a second radiation arm; One end of the first radiation arm is connected to the feeding end, and the other end is extended in a direction away from the feeding end, and the first radiation arm is used to generate intermediate frequency resonance; The second radiating arm comprises a first branch and a second branch extending from the ground end; The first branch extends from the ground end in a direction close to the first radiation arm and forms a first gap with the first radiation arm, and the first branch forms a parasitic coupling with the first radiation arm through the first gap and generates intermediate frequency resonance; The second branch extends from the ground end in a direction away from the first branch, and the second branch forms a parasitic coupling with the first radiation arm to generate intermediate frequency resonance.

2. The multi-branch coupled antenna for mobile device according to claim 1, characterized in that: The extending direction of the first branch is parallel to the first radiation arm, and the parallel distance is the first gap.

3. The multi-branch coupled antenna for mobile device according to claim 2, characterized in that: The first gap width is no greater than 2 mm.

4. The multi-branch coupled antenna for a mobile device according to claim 1, characterized in that: A second gap is formed between the feeding end and the grounding end, and a distance of the second gap is no greater than 22 mm.

5. The multi-branch coupled antenna for mobile device according to claim 1, characterized in that: The first radiation arm generates an intermediate frequency resonance of 1710-2170M, and its length is 1 / 4-1 / 2 of the working wavelength; The first branch is coupled with the first radiation arm to generate the same intermediate frequency resonance of 1710-2170M as the first radiation arm, and its length is 1 / 4-1 / 2 of the working wavelength; The second branch is coupled with the first radiation arm to generate a high-frequency resonance of 2300-2700M, and the length of the second branch is 1 / 4-1 / 2 of the working wavelength.

6. The multi-branch coupled antenna for a mobile device according to claim 1, characterized in that: The second branch is in a bent structure.

7. A mobile device, characterized in that: It comprises a housing, a middle frame, a small board and the multi-branch coupling antenna according to any one of claims 1 to 6; The middle frame is installed in the shell; The small plate is arranged on one side of the middle frame; the small plate is provided with a feeding point and a grounding point; The multi-branch coupling antenna is fixed to the middle frame and arranged close to the bottom of the shell; the feeding end of the multi-branch coupling antenna is electrically connected to the feeding point, and the grounding end of the multi-branch coupling antenna is electrically connected to the grounding point.

8. The mobile device according to claim 7, characterized in that: It also includes a feeding spring and a grounding spring, the feeding end is connected to the feeding point through the feeding spring, and the grounding end is connected to the grounding point through the grounding spring.

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