Multi-band antenna and mobile terminal

Abstract

The utility model provides a multi-band antenna and a mobile terminal, and the antenna comprises a first radiation branch knot, a second radiation branch knot, a third radiation branch knot, a fourth radiation branch knot, a feeding point, and a grounding point. The first radiation branch knot, the second radiation branch knot and the third radiation branch knot are electrically connected with the feeding point and the grounding point and then extend towards the left side of the feeding point. The fourth radiation branch knot is electrically connected with the feeding point and the grounding point and then extends towards the right side of the grounding point. The third radiation branch knot is located below the second radiation branch knot, and the second radiation branch knot is located below the first radiation branch knot. The multi-band antenna not only can broaden the radiation band of the whole antenna, but also enables the antenna to have good harmonic suppression capability.

Description

Technical Field

[0001] The utility model relates to the technical field of communications, and in particular to a multi-band antenna and a mobile terminal. Background Art

[0002] With the continuous development of 5G base station construction, the frequency bands supported by communication terminals are also constantly expanding. Nowadays, mobile phones are commonly used mobile terminal products. With the continuous development of technology, mobile phones will inevitably use 5G communication technology, which requires the number of antennas in mobile phones to be increased. However, the space of mobile phones is limited, and the bandwidth of antennas is also limited by space, so the frequency band covered by antennas is limited, making it difficult to achieve the bandwidth radiation of antennas.

[0003] With the development of science and technology, wireless terminal equipment has become an indispensable tool in people's life and work. Mobile phones are becoming thinner and smaller; and with the diversification of mobile phone functions, more and more devices are squeezed into the mobile phone, which has a small space to begin with, leaving less and less space for antennas. It should be noted that the performance of built-in antennas is mainly affected by many factors, such as antenna area, antenna clearance, antenna height and other environmental influences. Therefore, how to make full use of the originally small mobile terminal space is a goal that the industry has always pursued. At present, conventional mobile terminal antennas on the market are all implemented on the bottom shell. Due to space limitations, the area of ​​the antenna is also limited, which limits the bandwidth of the antenna and cannot meet the multi-band high gain requirements of GPS, WIFI and BT antennas.

[0004] In view of this, it is necessary for the present invention to provide a multi-band antenna and a mobile terminal using the antenna. Utility Model Content

[0005] The utility model aims to provide a multi-band antenna, which can not only broaden the overall radiation frequency band of the antenna, but also enable the antenna to have good harmonic suppression capability.

[0006] In order to solve the above technical problems, the utility model provides a multi-band antenna, which includes a first radiating branch, a second radiating branch, a third radiating branch, a fourth radiating branch, a feeding point and a grounding point. After the first radiating branch, the second radiating branch and the third radiating branch are electrically connected to the feeding point and the grounding point, they all extend to the left side of the feeding point. After the fourth radiating branch is electrically connected to the feeding point and the grounding point, it extends to the right side of the grounding point; the third radiating branch is located below the second radiating branch, and the second radiating branch is located below the first radiating branch.

[0007] As a further improvement of the present invention, the first radiation branch extends to the lower left of the feeding point, the third radiation branch extends to the lower left of the feeding point, and the second radiation branch is located between the first radiation branch and the third radiation branch.

[0008] As a further improvement of the present invention, the third radiation branch is arranged in an L shape, and the third radiation branch includes a connecting end and a free end, and the connecting end is connected to the feeding point.

[0009] As a further improvement of the present invention, the first radiating branch is arranged in an L shape, one end of the first radiating branch is connected to one end of the second radiating branch, and the other end of the first radiating branch is a free extension end.

[0010] As a further improvement of the present invention, the second radiating branch is arranged in an L shape, one end of the second radiating branch is connected to one end of the first radiating branch, and the other end of the second radiating branch is configured as a sheet-shaped radiating branch.

[0011] As a further improvement of the present invention, the fourth radiation branch is located on the upper right side of the grounding point, and the fourth radiation branch is connected with the first radiation branch and / or the second radiation to form a U-shaped opening.

[0012] As a further improvement of the present invention, the first radiation branch is configured as a radiation branch of the GPS frequency band, the second radiation branch is configured as a radiation branch of the 5.1G WiFi frequency band, the third radiation branch is configured as a radiation branch of the 2.4G WiFi frequency band, and the fourth radiation branch is a radiation branch of the 2.8G WiFi frequency band.

[0013] As a further improvement of the present invention, the length of the first radiating branch is greater than the length of the third radiating branch, the length of the third radiating branch is greater than the length of the second radiating branch, and the length of the second radiating branch is greater than the length of the fourth radiating branch.

[0014] As a further improvement of the present invention, the first radiation branch, the second radiation branch, the third radiation branch and the fourth radiation branch are all configured as IFA antennas.

[0015] The purpose of the utility model is to provide a mobile terminal to better apply the multi-band antenna.

[0016] In order to solve the above technical problems, the utility model provides a mobile terminal, which includes the above multi-band antenna.

[0017] The utility model provides a multi-band antenna, which includes a first radiating branch, a second radiating branch, a third radiating branch, a fourth radiating branch, a feeding point and a grounding point. The first radiating branch, the second radiating branch and the third radiating branch are all extended to the left side of the feeding point after being electrically connected to the feeding point and the grounding point, and the fourth radiating branch is extended to the right side of the grounding point after being electrically connected to the feeding point and the grounding point; the third radiating branch is located below the second radiating branch, and the second radiating branch is located below the first radiating branch. The multi-band antenna of the utility model can not only broaden the overall radiation frequency band of the antenna, but also enable the antenna to have good harmonic suppression capabilities. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a structural schematic diagram of the multi-band antenna of the utility model.

[0019] The descriptions of the reference numerals are as follows:

[0020] The first radiation branch 1, the second radiation branch 2, the third radiation branch 3, the fourth radiation branch 4, the feeding point A, and the grounding point B. DETAILED DESCRIPTION

[0021] The following is a further detailed description of the multi-band 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 a part of the actual structure. In particular, the emphasis of each accompanying drawing is different, and sometimes different proportions are used.

[0022] With the development of science and technology, wireless terminal equipment has become an indispensable tool in people's life and work. Mobile phones are becoming thinner and smaller; and with the diversification of mobile phone functions, more and more devices are squeezed into the mobile phone, which is not very spacious, leaving less and less space for antennas. The main factors affecting the performance of built-in antennas are antenna area or space, antenna clearance, antenna height and other environmental factors. Therefore, how to make full use of the limited mobile terminal space is a problem that has been studied in terminal antennas. At present, conventional mobile terminal antennas on the market are basically implemented on the bottom shell. Due to space limitations, the area of ​​the antenna is also limited, which limits the radiation bandwidth of the antenna and cannot meet the multi-band and high-gain requirements of GPS, WiFi and Bluetooth antennas.

[0023] The utility model provides a multi-band antenna, which includes a first radiating branch 1, a second radiating branch 2, a third radiating branch 3, a fourth radiating branch 4, a feeding point A and a grounding point B. The first radiating branch 1, the second radiating branch 2 and the third radiating branch 3 are electrically connected to the feeding point A and the grounding point B, and extend to the left side of the feeding point A. The fourth radiating branch 4 is electrically connected to the feeding point A and the grounding point B, and extends to the right side of the grounding point B. The third radiating branch 3 is located below the second radiating branch 2, and the second radiating branch 2 is located below the first radiating branch 1.

[0024] With such a configuration, the multi-band antenna of the utility model can not only broaden the overall radiation frequency band of the antenna, but also enable the antenna to have good harmonic suppression capability. The routing form of the multi-band antenna of the utility model has good harmonic suppression capability. The routing of the first radiation branch 1 of the multi-band antenna is longer than the traditional routing, and the three-quarters mode that falls within the 5G band can be moved outside the band.

[0025] Further, the first radiation branch 1 extends to the lower left of the feeding point A, the third radiation branch 3 extends to the lower left of the feeding point A, and the second radiation branch 2 is located between the first radiation branch 1 and the third radiation branch 3. The third radiation branch 3 is arranged in an L shape, and the third radiation branch 3 includes a connecting end and a free end, and the connecting end is connected to the feeding point A.

[0026] Preferably, the first radiating branch 1 is arranged in an L shape, one end of the first radiating branch 1 is connected to one end of the second radiating branch 2, and the other end of the first radiating branch 1 is a freely extending end. The second radiating branch 2 is arranged in an L shape, one end of the second radiating branch 2 is connected to one end of the first radiating branch 1, and the other end of the second radiating branch 2 is configured as a sheet-shaped radiating branch. The fourth radiating branch 4 is located on the upper right side of the grounding point B, and the fourth radiating branch 4 forms a U-shaped opening after being connected with the first radiating branch 1 and / or the second radiating branch. This arrangement can not only avoid the handset of the mobile terminal, but also increase the clearance of the antenna, further improving the radiation efficiency of the antenna.

[0027] Preferably, the first radiation branch 1 is configured as a radiation branch of the GPS frequency band, the second radiation branch 2 is configured as a radiation branch of the 5.1G WiFi frequency band, the third radiation branch 3 is configured as a radiation branch of the 2.4G WiFi frequency band, and the fourth radiation branch 4 is a radiation branch of the 2.8G WiFi frequency band. In other words, the modes of WiFi 5G in traditional antennas are generally more complicated, and in many cases they are mixed modes. In the actual debugging process, more attention is paid to radiation efficiency. The modes of the GPS band and WiFi 2.4G in the multi-band antenna of the utility model are relatively simple, and both are quarter-wavelength modes, and the first radiation branch 1, the second radiation branch 2, the third radiation branch 3 and the fourth radiation branch 4 are all controlled separately, and the wiring design method is more flexible than that of traditional antennas.

[0028] Furthermore, the length of the first radiation branch 1 is greater than the length of the third radiation branch 3, the length of the third radiation branch 3 is greater than the length of the second radiation branch 2, and the length of the second radiation branch 2 is greater than the length of the fourth radiation branch 4. The first radiation branch 1, the second radiation branch 2, the third radiation branch 3 and the fourth radiation branch 4 are all configured as IFA antennas. In the multi-band antenna of the utility model, the GPS routing is lengthened as much as possible, and the three-quarters of the mode that can fall within the 5G band is moved outside the band, and GPS then pulls the resonance back through the series capacitor and parallel capacitor. The routing pattern of the multi-band antenna of the utility model is relatively clear, easy to process and produce, and the debugging difficulty of the antenna is relatively small, and the overall radiation efficiency of the antenna is relatively high.

[0029] In summary, the utility model provides a multi-band antenna, which includes a first radiating branch 1, a second radiating branch 2, a third radiating branch 3, a fourth radiating branch 4, a feeding point A and a grounding point B. The first radiating branch 1, the second radiating branch 2 and the third radiating branch 3 are all extended to the left side of the feeding point A after being electrically connected to the feeding point A and the grounding point B, and the fourth radiating branch 4 is extended to the right side of the grounding point B after being electrically connected to the feeding point A and the grounding point B; the third radiating branch 3 is located below the second radiating branch 2, and the second radiating branch 2 is located below the first radiating branch 1. The multi-band antenna of the utility model can not only broaden the overall radiation band of the antenna, but also enable the antenna to have good harmonic suppression capabilities.

[0030] 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.

[0031] 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 multi-band antenna, characterized in that: The multi-band antenna includes a first radiating branch, a second radiating branch, a third radiating branch, a fourth radiating branch, a feeding point and a grounding point. The first radiating branch, the second radiating branch and the third radiating branch are electrically connected to the feeding point and the grounding point and extend to the left side of the feeding point. The fourth radiating branch is electrically connected to the feeding point and the grounding point and extends to the right side of the grounding point. The third radiation branch is located below the second radiation branch, and the second radiation branch is located below the first radiation branch.

2. The multi-band antenna according to claim 1, characterized in that: The first radiation branch extends to the lower left of the feeding point, the third radiation branch extends to the lower left of the feeding point, and the second radiation branch is located between the first radiation branch and the third radiation branch.

3. The multi-band antenna according to claim 2, characterized in that: The third radiation branch is arranged in an L shape, and the third radiation branch comprises a connecting end and a free end, and the connecting end is connected to the feeding point.

4. The multi-band antenna according to claim 3, characterized in that: The first radiating branch is arranged in an L shape, one end of the first radiating branch is connected to one end of the second radiating branch, and the other end of the first radiating branch is a free extending end.

5. The multi-band antenna according to claim 4, characterized in that: The second radiating branch is arranged in an L shape, one end of the second radiating branch is connected to one end of the first radiating branch, and the other end of the second radiating branch is configured as a sheet-shaped radiating branch.

6. The multi-band antenna according to claim 5, characterized in that: The fourth radiation branch is located at the upper right side of the grounding point, and the fourth radiation branch is connected with the first radiation branch and / or the second radiation branch to form a U-shaped opening.

7. The multi-band antenna according to claim 6, characterized in that: The first radiation branch is configured as a radiation branch of the GPS frequency band, the second radiation branch is configured as a radiation branch of the 5.1G WiFi frequency band, the third radiation branch is configured as a radiation branch of the 2.4G WiFi frequency band, and the fourth radiation branch is a radiation branch of the 2.8G WiFi frequency band.

8. The multi-band antenna according to claim 7, characterized in that: The length of the first radiation branch is greater than that of the third radiation branch, the length of the third radiation branch is greater than that of the second radiation branch, and the length of the second radiation branch is greater than that of the fourth radiation branch.

9. The multi-band antenna according to claim 8, characterized in that: The first radiation branch, the second radiation branch, the third radiation branch and the fourth radiation branch are all configured as IFA antennas.

10. A mobile terminal, characterized in that: The mobile terminal comprises the multi-band antenna according to any one of claims 1-9.

Images