Sub-6GHz frequency band antenna and mobile device

Abstract

The utility model provides a Sub-6 GHz frequency band antenna and a mobile device. The Sub-6 GHz frequency band antenna comprises a substrate, and a feeding point, a first radiation arm, a grounding point and a second radiation arm which are arranged on the substrate. The first radiation arm is connected with the feeding point and forms a first frequency band loop with the grounding point; the second radiation arm is connected with the grounding point and forms a second frequency band loop with the feeding point; the first radiation arm is coupled with the second radiation arm, a gap is formed between the first radiation arm and the second radiation arm, and the gap, a feeding point and a grounding point form a slot antenna working at a third frequency band. According to the Sub-6GHz frequency band antenna of the utility model, the number of antenna resonances can reach three, the bandwidth is increased, the number of antennas is reduced, antenna routing is reasonably arranged in a limited antenna clearance, and the efficiency of the antenna is improved by using a coupling effect.

Description

Technical Field

[0001] The utility model belongs to the technical field of mobile device antennas, and particularly relates to a Sub-6GHz band antenna and a mobile device. Background Art

[0002] With the rapid development of the fifth-generation mobile communication technology, intelligent electronic devices have also begun to be equipped with 5G antennas. Since most smartphones are designed with full screens, and the number of frequency bands required by antennas is increasing, the available antenna clearance is getting smaller, and the internal structure of the mobile phone becomes complex, seriously affecting the layout scheme of 5G antennas. The antenna efficiency and the Sub-6 GHz antenna bandwidth are affected. Currently, the Sub-6GHz antennas of intelligent electronic devices are usually located between the antenna diversity and the triple antenna. The routing area is limited, and the antenna performance and bandwidth are restricted by the environment, with poor performance. The bandwidth can only cover N77 / 78 (3.3GHz - 4.2GHz). Summary of the Utility Model

[0003] The purpose of the utility model is to overcome the defects and deficiencies in the prior art, and provide a Sub-6 GHz band antenna. The antenna can have three resonances, increasing the bandwidth, reducing the number of antennas, reasonably arranging the antenna routing within the limited antenna clearance, and improving the antenna efficiency by using the coupling effect.

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

[0005] A Sub-6 GHz band antenna includes a substrate, a feeding point, a first radiation arm, a grounding point, and a second radiation arm disposed on the substrate; the first radiation arm is connected to the feeding point and forms a first frequency band loop with the grounding point; the second radiation arm is connected to the grounding point and forms a second frequency band loop with the feeding point; the first radiation arm and the second radiation arm are coupled; a gap is formed between the first radiation arm and the second radiation arm, and the gap, the feeding point, and the grounding point form a slot antenna operating in a third frequency band.

[0006] In the Sub-6 GHz band antenna provided by the utility model, the first radiation arm operates in a first frequency band, the second radiation arm operates in a second frequency band, and the first radiation arm and the second radiation arm are coupled, which is beneficial to increasing the bandwidth; a gap operating in a third frequency band is formed between the first radiation arm and the second radiation arm, exciting a third resonance. The Sub-6 GHz band antenna provided by the utility model can have three antenna resonances, reducing the number of antennas, reasonably arranging the antenna routing within the limited antenna clearance, and improving the antenna efficiency by using the coupling effect.

[0007] Further, the gap includes a first slit segment; the first radiating arm includes a first parallel segment, and the first radiating arm is connected to the feeding point; the second radiating arm includes a second parallel segment, and the second radiating arm is connected to the grounding point; the first parallel segment and the second parallel segment are arranged opposite to each other in parallel and shielded from light, and a first slit segment operating in the third frequency band is formed between the first parallel segment and the second parallel segment.

[0008] Further, the first radiating arm further includes a first radiating segment connected to the first parallel segment, and the extending direction of the first radiating segment is different from that of the first parallel segment; the second radiating arm further includes a second radiating segment connected to the second parallel segment, and the extending direction of the second radiating segment is different from that of the second parallel segment.

[0009] Further, the feeding point and the grounding point are arranged side by side; the first radiating segment is bent, and the first radiating segment extends in a direction away from the feeding point; the second radiating segment is bent, and the second radiating segment extends in a direction away from the grounding point. The first radiating segment being bent and the second bent segment being bent reduce the occupied space of the Sub-6GHz band antenna.

[0010] Further, the first radiating segment is parallel to part or the whole of the second radiating segment, and a second slit segment communicating with the first slit segment is formed between the first radiating segment and the second radiating segment, and the second slit segment operates in the third frequency band. A second slit segment is formed between the first radiating segment and the second radiating segment, and the second slit segment communicates with the first slit segment, reducing its occupied space while meeting the length requirement of the third frequency band for the slit antenna.

[0011] Further, both the first slit segment and the second slit segment are strip-shaped. The uniform strip-shaped first slit segment and second slit segment are conducive to forming stable resonance.

[0012] Further, the first radiating arm operates in the 3.3 - 3.8 GHz frequency band, and its total length is one-fourth of its operating wavelength; the second radiating arm operates in the 3.8 - 4.2 GHz frequency band, and its total length is one-fourth of its operating wavelength; the slit antenna operates in the 4.4 - 5 GHz frequency band, and the total length of the gap formed between the first radiating arm and the second radiating arm is one-fourth of its operating wavelength. Appropriate lengths are selected to optimize the antenna transmission performance and provide higher antenna efficiency.

[0013] Further, the width of the gap is 1 - 2 mm. Controlling the appropriate gap width enables coupling between the first radiating arm and the second radiating arm to improve the antenna efficiency, while meeting the control of the slit antenna wavelength and controlling the directivity and radiation efficiency of the slit antenna.

[0014] The present utility model further provides a mobile device, which includes a housing, a main board, and the above-mentioned Sub-6 GHz band antenna; the housing is formed by enclosing a front housing and a rear housing; the main board is disposed inside the housing; the substrate of the Sub-6 GHz band antenna is located inside the housing and is mounted on the rear housing, and the feeding point, the first radiation arm, the grounding point, and the second radiation arm are located on a surface of the substrate facing away from the rear housing, and the feeding point and the grounding point are electrically connected to the main board.

[0015] The mobile device provided by the present utility model arranges the Sub-6 GHz band antenna on the rear housing, without separately occupying the space on the main board and inside the housing, and can generate three resonances, which is beneficial to reducing the total number of antennas of the mobile device and reducing costs.

[0016] For better understanding and implementation, the present utility model will be described in detail below with reference to the accompanying drawings. Description of the Drawings

[0017] Figure 1 It is a schematic structural diagram of the Sub-6 GHz band antenna in Embodiment 1.

[0018] Figure 2 It is an S11 diagram of the Sub-6 GHz band antenna in Embodiment 1.

[0019] Figure 3 It is an antenna efficiency diagram of the Sub-6 GHz band antenna in Embodiment 1. Detailed Embodiments

[0020] The embodiments of the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It can be understood that the specific embodiments described herein are only used to explain the embodiments of the present utility model, rather than limiting the embodiments of the present utility model. Additionally, it should be noted that for the sake of description, only parts related to the embodiments of the present utility model are shown in the drawings, rather than all the structures.

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

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

[0023] Example 1

[0024] This embodiment provides a Sub-6 GHz band antenna. Figure 1 It is a schematic structural diagram of the Sub-6 GHz band antenna. Please refer to Figure 1 , the Sub-6 GHz band antenna includes a substrate 1, a feeding point 2, a first radiation arm 3, a grounding point 4, and a second radiation arm 5 provided on the substrate 1; the first radiation arm 3 is connected to the feeding point 2 and forms a first frequency band loop with the grounding point 4; the second radiation arm 5 is connected to the grounding point 4 and forms a second frequency band loop with the feeding point 2; the first radiation arm 3 and the second radiation arm 5 are coupled; a gap 6 is formed between the first radiation arm 3 and the second radiation arm 5, and the gap 6, the feeding point 2, and the grounding point 4 form a slot antenna operating in a third frequency band.

[0025] In the Sub-6 GHz band antenna provided in this embodiment, the first radiation arm 3 operates in a first frequency band, the second radiation arm 5 operates in a second frequency band, and the first radiation arm 3 and the second radiation arm 5 are coupled to increase the antenna bandwidth; a gap 6 operating in a third frequency band is formed between the first radiation arm 3 and the second radiation arm 5 to excite a third antenna resonance. The Sub-6 GHz band antenna provided in this embodiment can achieve 3 antenna resonances, increase the bandwidth, reduce the number of antennas, reasonably arrange the antenna traces within the limited antenna clearance, and improve the antenna efficiency by using the coupling effect.

[0026] Please refer to Figure 1 , in this embodiment, the gap 6 includes a first slot segment 61; the first radiation arm 3 includes a first parallel segment 31, and the first radiation arm 3 is connected to the feeding point 2; the second radiation arm 5 includes a second parallel segment 51, and the second radiation arm 5 is connected to the grounding point 4; the first parallel segment 31 and the second parallel segment 51 are arranged opposite to each other and are parallel to avoid light, and a first slot segment 61 operating in a third frequency band is formed between the first parallel segment 31 and the second parallel segment 51.

[0027] Please refer to Figure 1 , in this embodiment, the first radiation arm 3 further includes a first radiation segment 34 connected to the first parallel segment 31, and the extending direction of the first radiation segment 34 is different from that of the first parallel segment 31; the second radiation arm 5 further includes a second radiation segment 52 connected to the second parallel segment 51, and the extending direction of the second radiation segment 52 is different from that of the second parallel segment 51.

[0028] Please refer to Figure 1 , in this embodiment, the feeding point 2 and the grounding point 4 are arranged side by side; the first radiation section 34 is bent and extends in a direction away from the feeding point 2; the second radiation section 52 is bent and extends in a direction away from the grounding point 4. The first radiation section 34 being bent and the second bent section being bent reduce the occupied space of the Sub-6 GHz band antenna.

[0029] Please refer to Figure 1 , in this embodiment, the first radiation section 34 is parallel to part or the whole of the second radiation section 52, and a second slot section 62 communicating with the first slot section 61 is formed between the first radiation section 34 and the second radiation section 52, and the second slot section 62 operates in the third frequency band. A second slot section 62 is formed between the first radiation section 34 and the second radiation section 52, and the second slot section 62 communicates with the first slot section 61, reducing its occupied space while meeting the length requirements of the slot antenna in the third frequency band.

[0030] Please refer to Figure 1 , in one implementation, the first radiation arm 3 further includes a first horizontal section 32 and a first vertical section 33, and the first parallel section 31, the first horizontal section 32, the first vertical section 33 and the first radiation section 34 are connected in sequence; the second radiation section 52 is connected to the second parallel section 51 and bent, the first radiation section 34 is parallel to the second radiation section 52, and a second slot is formed by enclosing the first horizontal section 32, the first vertical section 33, the first radiation section 34 and the second radiation section 52.

[0031] In this embodiment, both the first slot section 61 and the second slot section 62 are strip-shaped. The uniform strip-shaped first slot section 61 and second slot section 62 are conducive to forming a stable resonance.

[0032] In this embodiment, the width of the gap 6 is 1-2 mm. Controlling the appropriate width of the gap 6 enables coupling between the first radiation arm 3 and the second radiation arm 5 to improve the antenna efficiency, and at the same time meets the control of the slot antenna wavelength, which is conducive to controlling the directivity and radiation efficiency.

[0033] In this embodiment, the first radiation arm 3 operates in the 3.3-3.8 GHz frequency band, and its total length is one-quarter of its operating wavelength; the second radiation arm 5 operates in the 3.8-4.2 GHz frequency band, and its total length is one-quarter of its operating wavelength; the slot antenna operates in the 4.4-5 GHz frequency band, and the total length of the gap 6 formed between the first radiation arm 3 and the second radiation arm 5 is one-quarter of its operating wavelength. Selecting appropriate lengths optimizes the antenna transmission performance and provides higher antenna efficiency.

[0034] In a Sub-6 GHz band antenna, the feeding point 2 and the grounding point are independent and coupled to each other. The first radiation arm 3 operates in the first frequency band, and the second radiation arm 5 operates in the second frequency band. The first radiation arm 3 and the second radiation arm 5 are coupled to form a gap 6 that operates in the third frequency band. The antenna can achieve 3 resonances, with a bandwidth covering 1700 MHz, and full coverage of the N77, N78, and N79 frequency bands in the Sub-6 GHz band is achieved with a limited antenna area. In the Sub-6 GHz band antennas of the prior art, a tuner needs to be added to adjust the resonance frequency band to cover the entire frequency band. However, in the Sub-6 GHz band antenna provided in this embodiment, the first radiation arm 3, the second radiation arm 5, and the slot antenna are used to achieve full coverage of the N77, N78, and N79 frequency bands in the Sub-6 GHz band, and the routing area can be reduced to a length of 10.88 mm and a width of 7.55 mm, and the size of the entire Sub-6 GHz band antenna can be reduced to 163 mm * 75 mm * 7.9 mm.

[0035] Figure 2 is the S11 diagram of the Sub-6 GHz band antenna, please refer to Figure 2 , the first radiation arm 3 operates in the 3.3 - 3.8 GHz frequency band, and the return loss is (-9) to (-6) dB; the second radiation arm 5 operates in the 3.8 - 4.2 GHz frequency band, and the return loss is (-10) to (-3) dB; the slot antenna operates in the 4.4 - 5 GHz frequency band, and the return loss is (-17) to (-8) dB.

[0036] Figure 3 is the antenna efficiency diagram of the Sub-6 GHz band antenna, please refer to Figure 3 , the first radiation arm 3 operates in the 3.3 - 3.8 GHz frequency band, and the antenna efficiency is (-7) to (-5) dB; the second radiation arm 5 operates in the 3.8 - 4.2 GHz frequency band, and the antenna efficiency is (-7) to (-5) dB; the slot antenna operates in the 4.4 - 5 GHz frequency band, and the antenna efficiency is (-6) to (-5) dB.

[0037] Example 2

[0038] This embodiment provides a mobile device, including a housing, a main board, and the above-mentioned Sub-6 GHz band antenna; the housing is formed by enclosing a front housing and a rear housing; the main board is disposed inside the housing; the substrate 1 of the Sub-6 GHz band antenna is located inside the housing and mounted on the rear housing, and the feeding point 2, the first radiation arm 3, the grounding point 4, and the second radiation arm 5 are located on the side of the substrate 1 facing away from the rear housing, and the feeding point 2 and the grounding point 4 are electrically connected to the main board.

[0039] The mobile device provided by the present utility model sets the Sub-6 GHz band antenna on the rear case, without separately occupying the space on the main board and inside the case, and can generate three resonances, which is beneficial to reducing the total number of antennas of the mobile device and lowering the cost.

[0040] The present utility model is not limited to the above embodiments. If various modifications or deformations of the present utility model do not depart from the spirit and scope of the present utility model, and provided that these modifications and deformations fall within the scope of the claims of the present utility model and equivalent technical scope, then the present utility model also intends to include these modifications and deformations.

Claims

1. A Sub-6 GHz band antenna, characterized in that: It includes a substrate and a feeding point, a first radiation arm, a grounding point and a second radiation arm arranged on the substrate; the first radiation arm is connected to the feeding point and forms a first frequency band loop with the grounding point; the second radiation arm is connected to the grounding point and forms a second frequency band loop with the feeding point; the first radiation arm and the second radiation arm are coupled; a gap is formed between the first radiation arm and the second radiation arm, and this gap and the feeding point and the grounding point form a slot antenna operating in a third frequency band.

2. The Sub-6 GHz band antenna according to claim 1, characterized in that: The gap includes a first slot segment; The first radiation arm includes a first parallel segment, and the first radiation arm is connected to the feeding point; The second radiation arm includes a second parallel segment, and the second radiation arm is connected to the grounding point; The first parallel segment and the second parallel segment are arranged opposite to each other and are parallel, and a first slot segment operating in a third frequency band is formed between the first parallel segment and the second parallel segment.

3. The Sub-6 GHz band antenna according to claim 2, characterized in that: The first radiation arm further includes a first radiation segment connected to the first parallel segment, and the extending direction of the first radiation segment is different from that of the first parallel segment; The second radiation arm further includes a second radiation segment connected to the second parallel segment, and the extending direction of the second radiation segment is different from that of the second parallel segment.

4. The Sub-6 GHz band antenna according to claim 3, characterized in that: The feeding point and the grounding point are arranged side by side; The first radiation segment is bent, and the first radiation segment extends in a direction away from the feeding point; The second radiation segment is bent, and the second radiation segment extends in a direction away from the grounding point.

5. The Sub-6 GHz band antenna according to claim 4, characterized in that: The first radiation segment is parallel to part or the whole of the second radiation segment, and a second slot segment communicating with the first slot segment is formed between the first radiation segment and the second radiation segment, and the second slot segment operates in a third frequency band.

6. The Sub-6 GHz band antenna according to claim 5, characterized in that: Both the first slot segment and the second slot segment are strip-shaped.

7. The Sub-6 GHz band antenna according to any one of claims 1-6, characterized in that: The first radiation arm operates in the frequency band of 3.3-3.8 GHz, and its total length is one-fourth of its operating wavelength; The second radiation arm operates in the frequency band of 3.8-4.2 GHz, and its total length is one-fourth of its operating wavelength; The slot antenna operates in the frequency band of 4.4-5 GHz, and the total length of the gap formed between the first radiation arm and the second radiation arm is one-fourth of its operating wavelength.

8. The Sub-6 GHz band antenna according to claim 6, characterized in that: The width of the gap is 1-2 mm.

9. A mobile device, characterized in that: It includes a housing, a main board, and a Sub-6 GHz band antenna according to any one of claims 1-7; The housing is formed by enclosing a front shell and a rear shell; the main board is disposed inside the housing; The substrate of the Sub-6 GHz band antenna is located inside the housing and mounted on the rear shell. The feeding point, the first radiation arm, the grounding point, and the second radiation arm are located on the side of the substrate facing away from the rear shell, and the feeding point and the grounding point are electrically connected to the main board.

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