Full-band MIMO metal frame antenna and mobile terminal

Abstract

The utility model provides a full-band MIMO metal frame antenna. The full-band MIMO metal frame antenna comprises a first radiation unit, a second radiation unit and a third radiation unit which are connected with one another, the first radiation unit comprises a first feeding point, a first grounding point, a first branch antenna, a second branch antenna and a third branch antenna, and the second radiation unit comprises a second feeding point, a second grounding point, a fourth branch antenna and a seventh branch antenna. The third radiation unit comprises a third feeding point, a third grounding point, a fifth branch antenna and a sixth branch antenna; the first feeding point is located between the first branch antenna and the second branch antenna, the third branch antenna is located beside the first grounding point, and the first feeding point is electrically connected with the first grounding point. According to the full-band MIMO metal frame antenna, the low frequency and the medium-high frequency of the main antenna can be split, free combination of the low frequency and the medium-high frequency can be realized, a complex switch tuning function is reduced, full-band coverage can be realized in a limited space at the lower part of a terminal, and the performance of the antenna is not influenced.

Description

Technical Field

[0001] The utility model relates to the technical field of communication, and in particular to a full-band MIMO full-metal frame antenna and a mobile terminal using the antenna. Background Art

[0002] As mobile phone products become thinner and lighter and their screen-to-body ratio increases, the antenna clearance area is compressed. As a result, the metal outer frame material is used as the antenna radiator. The antenna solution is widely used. One of the antenna processes, the in-mold decorative antenna, is used in smart communication devices. The outer frame of the mobile phone is made of plastic material, and the inner part is inlaid with broken metal parts as the antenna body. Due to the shape of the outer frame of the mobile phone, this process is more difficult to achieve antenna bandwidth, and a complex antenna switch is required to achieve the tuning function. Conventional antenna solution: The lower antenna of the mobile phone is the main antenna with low frequency plus medium and high frequency to achieve the signal reception and transmission functions. Due to the layout of the lower antenna, the low, medium and high frequency MIMO antennas can only be distributed on the upper part of the mobile phone, making it difficult to achieve full-band coverage.

[0003] In view of this, it is necessary for the utility model to provide a full-band MIMO metal frame antenna to solve the above problems. Utility Model Content

[0004] The purpose of the utility model is to provide a full-band MIMO metal frame antenna, which can split the low frequency and medium and high frequency of the main antenna, and can realize the free combination of low frequency and medium and high frequency, while reducing the complex switching tuning function, and can also realize full-band coverage in the limited space below the terminal, and the antenna performance will not be affected.

[0005] To solve the above technical problems, the utility model provides a full-band MIMO metal frame antenna, which includes a first radiating unit, a second radiating unit and a third radiating unit connected to each other; the first radiating unit includes a first feeding point, a first grounding point, a first branch antenna, a second branch antenna and a third branch antenna, the second radiating unit includes a second feeding point, a second grounding point, a fourth branch antenna and a seventh branch antenna, the third radiating unit includes a third feeding point, a third grounding point, a fifth branch antenna and a sixth branch antenna; the first feeding point is located between the first branch antenna and the second branch antenna, the third branch antenna is located next to the first grounding point, and the first feeding point and the first grounding point are electrically connected.

[0006] As a further improvement of the present invention, the first branch antenna is configured as a main antenna, the second branch antenna is configured as a bracket antenna, and the bracket antenna is erected on the floor and is not connected to the upper side of the third branch antenna.

[0007] As a further improvement of the present invention, the second branch antenna is configured as an LDS antenna or an FPC antenna.

[0008] As a further improvement of the present invention, the frequency band controlled by the first branch antenna is in the range of 600MHz to 960MHz, the frequency band controlled by the second branch antenna is in the range of 1700MHz to 2200MHz, and the frequency band controlled by the third branch antenna is in the range of 2300MHz to 2700MHz.

[0009] As a further improvement of the present invention, the second feeding point is between the fourth branch antenna and the seventh branch antenna, and the second feeding point is electrically connected to the fourth branch antenna, and the fourth branch antenna is disconnected from the seventh branch antenna.

[0010] As a further improvement of the present invention, the fourth branch antenna is configured as a main radiator, and the seventh branch antenna is configured as a high-frequency parasitic antenna.

[0011] As a further improvement of the present invention, the second grounding point is located between the fourth branch antenna and the fifth branch antenna, the third feeding point is located between the sixth branch antenna and the fifth branch antenna, and the third feeding point is electrically connected to the sixth branch antenna.

[0012] As a further improvement of the present invention, the fifth branch antenna and the sixth branch antenna are disconnected from each other.

[0013] As a further improvement of the present invention, the fourth branch antenna controls a frequency band of 1450 MHz to 2700 MHz, the fifth branch antenna controls a frequency band of 750 MHz to 960 MHz, and the sixth branch antenna controls a frequency band of 3300 MHz to 4200 MHz.

[0014] The purpose of the utility model is to provide a mobile terminal to better apply the above-mentioned full-band MIMO metal frame antenna.

[0015] In order to solve the above technical problems, the utility model provides a mobile terminal, which includes the above-mentioned full-band MIMO metal frame antenna.

[0016] The utility model provides a full-band MIMO metal frame antenna, which includes a first radiating unit, a second radiating unit and a third radiating unit connected to each other; the first radiating unit includes a first feeding point, a first grounding point, a first branch antenna, a second branch antenna and a third branch antenna, the second radiating unit includes a second feeding point, a second grounding point, a fourth branch antenna and a seventh branch antenna, the third radiating unit includes a third feeding point, a third grounding point, a fifth branch antenna and a sixth branch antenna; the first feeding point is located between the first branch antenna and the second branch antenna, the third branch antenna is located beside the first grounding point, and the first feeding point and the first grounding point are electrically connected. The full-band MIMO metal frame antenna of the utility model can split the low frequency and medium and high frequency of the main antenna, and can realize the free combination of low frequency and medium and high frequency, while reducing the complex switch tuning function, and can also realize full-band coverage in the limited space at the bottom of the terminal, and the antenna performance will not be affected. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the structure of the full-band MIMO metal frame antenna of the utility model.

[0018] Figure 2 This is a simulation diagram of S11 of the first radiation unit in the present invention.

[0019] Figure 3 This is a simulation diagram of S11 of the second radiation unit in the present invention.

[0020] Figure 4 This is a simulation diagram of S11 of the third radiation unit in the present invention.

[0021] Figure 5 This is the antenna efficiency diagram of the first radiation unit in the present invention.

[0022] Figure 6 This is the antenna efficiency diagram of the second radiation unit in the present invention.

[0023] Figure 7 This is the antenna efficiency diagram of the third radiation unit in the present utility model.

[0024] The descriptions of the reference numerals are as follows:

[0025] The first branch antenna 10, the second branch antenna 11, the third branch antenna 12, the first feeding point 13, the first grounding point 14, the fourth branch antenna 20, the seventh branch antenna 21, the second feeding point 22, the second grounding point 23, the fifth branch antenna 30, the sixth branch antenna 31, the third feeding point 32, and the third grounding point 33. DETAILED DESCRIPTION

[0026] The following is a further detailed description of the full-band MIMO metal frame antenna proposed by the utility model and the mobile terminal using the antenna in combination with the accompanying drawings and specific embodiments. It should be noted that the accompanying drawings are all in a very simplified form and use non-precise proportions, which are only used to conveniently and clearly assist in explaining the purpose of the embodiments of the utility model. In addition, the structure shown in the accompanying drawings is often part of the actual structure. In particular, the emphasis that each drawing needs to show is different, and sometimes different proportions are used.

[0027] As terminal products become thinner and lighter and their screen-to-body ratio increases, the antenna clearance area is compressed. As a result, the metal shell material is used as the antenna radiator. The antenna solution is widely used. Limited by the shape of the mobile phone's outer frame, the in-mold decoration antenna process is more difficult to achieve antenna bandwidth, and a complex antenna switch is required to achieve the tuning function. Conventional antenna solutions do not use the main antenna low frequency plus medium and high frequency to achieve signal reception and transmission functions. Limited by the antenna layout at the bottom of the terminal antenna, the low, medium and high frequency MIMO antennas can only be distributed on the upper part of the terminal.

[0028] The utility model provides a full-band MIMO metal frame antenna, which can be applied to mobile terminals, such as mobile phones, tablets or other similar electronic mobile terminals.

[0029] Specifically, the full-band MIMO metal frame antenna includes a first radiation unit, a second radiation unit and a third radiation unit connected to each other; the first radiation unit includes a first feeding point 13, a first grounding point 14, a first branch antenna 10, a second branch antenna 11 and a third branch antenna 12, the second radiation unit includes a second feeding point 22, a second grounding point 23, a fourth branch antenna 20 and a seventh branch antenna 21, the third radiation unit includes a third feeding point 32, a third grounding point 33 and a fifth branch antenna 30 and a sixth branch antenna 31; the first feeding point 13 is located between the first branch antenna 10 and the second branch antenna 11, the third branch antenna 12 is located next to the first grounding point 14, and the first feeding point 13 and the first grounding point 14 are electrically connected.

[0030] With such a configuration, the full-band MIMO all-metal frame antenna of the utility model can split the low frequency and medium and high frequency of the main antenna, and can realize the free combination of low frequency and medium and high frequency, while reducing the complex switch tuning function, and can also achieve full-band coverage in the limited space at the bottom of the terminal, and the antenna performance will not be affected. Specifically, the low frequency and medium and high frequency of the main antenna are split, which can realize the free combination of low frequency and medium and high frequency, and the antenna performance is not affected; the antenna at the bottom of the mobile terminal integrates the full-bandwidth MIMO band, which can optimize the layout of the upper antenna structure; the antenna can integrate a low-frequency MIMO antenna, combined with the antenna design above the mobile terminal, theoretically can realize a low-frequency antenna combination.

[0031] Further, the first branch antenna 10 is configured as a main antenna, the second branch antenna 11 is configured as a bracket antenna, and the bracket antenna is erected on the floor and is not on the upper side of the third branch antenna 12. The second branch antenna 11 is configured as an LDS antenna or an FPC antenna. The frequency band range controlled by the first branch antenna 10 is 600MHz to 960MHz, the frequency band range of the second branch antenna 11 is 1700MHz to 2200MHz, and the frequency band range of the third branch antenna 12 is 2300MHz to 2700MHz.

[0032] Further, the second feeding point 22 is between the fourth branch antenna 20 and the seventh branch antenna 21, and the second feeding point 22 is electrically connected to the fourth branch antenna 20, and the fourth branch antenna 20 is disconnected from the seventh branch antenna 21. The fourth branch antenna 20 is configured as a main radiator, and the seventh branch antenna 21 is configured as a high-frequency parasitic antenna. The second grounding point 23 is located between the fourth branch antenna 20 and the fifth branch antenna 30, and the third feeding point 32 is located between the sixth branch antenna 31 and the fifth branch antenna 30, and the third feeding point 32 is electrically connected to the sixth branch antenna 31. The fifth branch antenna 30 is disconnected from the sixth branch antenna 31. The control frequency band of the fourth branch antenna 20 is 1450MHz to 2700MHz, the control frequency band of the fifth branch antenna 30 is 750MHz to 960MHz, and the control frequency band of the sixth branch antenna 31 is 3300MHz to 4200MHz.

[0033] That is to say, the first radiation unit can not only control low-frequency radiation, but also high-frequency radiation and medium-frequency radiation; the second radiation unit can not only control medium-high frequency radiation, but also high-frequency radiation; the third radiation unit can not only control low-frequency radiation, but also control low-frequency radiation and high-frequency radiation, and can also make low-frequency and high-frequency free combination, and the overall performance of the antenna is not affected. The utility model can realize the tuning function without matching a complex antenna switch.

[0034] In summary, the utility model provides a full-band MIMO metal frame antenna, which includes a first radiating unit, a second radiating unit and a third radiating unit connected to each other; the first radiating unit includes a first feeding point 13, a first grounding point 14, a first branch antenna 10, a second branch antenna 11 and a third branch antenna 12, the second radiating unit includes a second feeding point 22, a second grounding point 23, a fourth branch antenna 20 and a seventh branch antenna 21, the third radiating unit includes a third feeding point 32, a third grounding point 33 and a fifth branch antenna 30 and a sixth branch antenna 31; the first feeding point 13 is located between the first branch antenna 10 and the second branch antenna 11, the third branch antenna 12 is located next to the first grounding point 14, and the first feeding point 13 and the first grounding point 14 are electrically connected. The full-band MIMO metal frame antenna of the utility model can separate the low frequency and medium and high frequency of the main antenna, and can realize the free combination of low frequency and medium and high frequency, while reducing the complex switch tuning function, and can also realize full-band coverage in the limited space below the terminal, and the antenna performance will not be affected. Figure 2-Figure 4 As shown in FIG. 1 , they are simulation diagrams of S11 of the first radiation unit, the second radiation unit, the third radiation unit and the fourth radiation unit respectively; Figure 5-7 As shown in the figure, the antenna radiation efficiency of the first radiation unit, the second radiation unit, the third radiation unit and the fourth radiation unit are respectively shown. It can be seen that the overall performance of the antenna of the utility model is superior, and the low frequency and medium and high frequency of the main antenna can be split, and the low frequency and medium and high frequency can be freely combined. While reducing the complex switching tuning function, it can also achieve full frequency band coverage in the limited space at the bottom of the terminal, and the antenna performance will not be affected.

[0035] It should be noted that the various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referenced to each other. In addition, the different parts between the various embodiments can also be used in combination with each other, and the present utility model is not limited to this.

[0036] The above description is only a description of the preferred embodiment of the utility model, and is not any limitation on the scope of the utility model. Any changes and modifications made by ordinary technicians in the field of the utility model based on the above disclosure shall fall within the scope of protection of the claims.

Claims

1. A full-band MIMO metal frame antenna, characterized by: The full-band MIMO metal frame antenna includes a first radiation unit, a second radiation unit and a third radiation unit connected to each other; the first radiation unit includes a first feeding point, a first grounding point, a first branch antenna, a second branch antenna and a third branch antenna, the second radiation unit includes a second feeding point, a second grounding point, a fourth branch antenna and a seventh branch antenna, the third radiation unit includes a third feeding point, a third grounding point, a fifth branch antenna and a sixth branch antenna; the first feeding point is located between the first branch antenna and the second branch antenna, the third branch antenna is located next to the first grounding point, and the first feeding point and the first grounding point are electrically connected.

2. The full-band MIMO metal frame antenna according to claim 1, characterized in that: The first branch antenna is configured as a main antenna, the second branch antenna is configured as a bracket antenna, and the bracket antenna is erected on the floor and is not connected to the upper side of the third branch antenna.

3. The full-band MIMO metal frame antenna according to claim 2, characterized in that: The second branch antenna is configured as an LDS antenna or an FPC antenna.

4. The full-band MIMO metal frame antenna according to claim 3, characterized in that: The frequency band controlled by the first branch antenna is in the range of 600 MHz to 960 MHz, the frequency band controlled by the second branch antenna is in the range of 1700 MHz to 2200 MHz, and the frequency band controlled by the third branch antenna is in the range of 2300 MHz to 2700 MHz.

5. The full-band MIMO metal frame antenna according to claim 4, characterized in that: The second feeding point is between the fourth branch antenna and the seventh branch antenna, and the second feeding point is electrically connected to the fourth branch antenna, and the fourth branch antenna is disconnected from the seventh branch antenna.

6. The full-band MIMO metal frame antenna according to claim 5, characterized in that: The fourth branch antenna is configured as a main radiator, and the seventh branch antenna is configured as a high-frequency parasitic antenna.

7. The full-band MIMO metal frame antenna according to claim 6, characterized in that: The second grounding point is located between the fourth branch antenna and the fifth branch antenna, the third feeding point is located between the sixth branch antenna and the fifth branch antenna, and the third feeding point is electrically connected to the sixth branch antenna.

8. The full-band MIMO metal frame antenna according to claim 7, characterized in that: The fifth branch antenna and the sixth branch antenna are disconnected from each other.

9. The full-band MIMO metal frame antenna according to claim 8, characterized in that: The fourth branch antenna controls a frequency band of 1450 MHz to 2700 MHz, the fifth branch antenna controls a frequency band of 750 MHz to 960 MHz, and the sixth branch antenna controls a frequency band of 3300 MHz to 4200 MHz.

10. A mobile terminal, characterized in that: The mobile terminal comprises the full-band MIMO metal frame antenna as described in any one of claims 1-9.

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