WO2020238996A1

WO2020238996A1 - Antenna and mobile terminal

Info

Publication number: WO2020238996A1
Application number: PCT/CN2020/092752
Authority: WO
Inventors: 周圆; 侯猛
Original assignee: 华为技术有限公司
Priority date: 2019-05-31
Filing date: 2020-05-28
Publication date: 2020-12-03
Also published as: CN112018494B; CN112018494A

Abstract

The present application provides an antenna and a mobile terminal. The antenna comprises a feeding unit and a radiating unit. The feeding unit is connected, by means of a power splitter, to a first radiating unit and a second radiating unit that are electrically isolated. The power divider is used for adjusting the difference between the maximum point of the pattern of the first radiating unit and the maximum point of the pattern of the second radiating unit to be within a set range. The first radiating unit is connected to a phase shifter. The phase shifter is used for adjusting the direction of the pattern of the first radiating unit and making the maximum point of the pattern of the first radiating unit and the minimum point of the pattern of the second radiating unit at least partially overlap and the minimum point of the pattern of the first radiating unit and the maximum point of the pattern of the second radiating unit at least partially overlap. During use, by adjusting the power splitter and the phase shifter, the phase difference and amplitude difference between multiple radiating units are changed, so that the directivity of a single radiating unit is reduced, and the depressed point of the radiation pattern becomes smaller, thereby improving the antenna communication effect.

Description

Antenna and mobile terminal

This application claims the priority of the Chinese patent application filed with the State Intellectual Property Office of China with the application number 201910468586.7, and the priority of the Chinese patent application with the title of “an antenna and mobile terminal” on May 31, 2019, all of which The content is incorporated in this application by reference.

Technical field

This application relates to the field of communication technology, and in particular to an antenna and a mobile terminal.

Background technique

With the development of mobile communication applications, the scenarios where mobile phones connect to Wi-Fi have become more and more extensive. On the mobile terminal equipment side, how to improve Wi-Fi performance and user experience is particularly important. The radiation pattern of the Wi-Fi antenna is an important indicator that affects the user experience. However, due to the many antenna layouts on the mobile phone, the location of the Wi-Fi antenna is often limited by the structure, and it is difficult to obtain low directivity and a rounder radiation. Directional patterns, and poor radiation in certain directions and angles, affect user experience.

Summary of the invention

The present application provides an antenna and a mobile terminal, which are used to improve the communication effect of the antenna, thereby improving the use effect of the mobile terminal.

In a first aspect, an antenna is provided, which is applied to a mobile terminal and is used to improve the communication effect of the mobile terminal. In a specific setting, the antenna includes a feeding unit and a radiating unit, wherein the feeding unit is used to The signal is transmitted to the radiation unit. In the specific setting, the feeding unit is connected to the first radiation unit and the second radiation unit, and the first radiation unit and the second radiation unit are electrically isolated. In the specific connection, the feeding unit is first connected to a power divider, which is respectively connected to the first radiating unit and the second radiating unit. And the power divider is used to adjust the difference between the maximum point of the pattern of the first radiation unit and the maximum point of the pattern of the second radiation unit to be within a set range. In addition, a phase shifter is provided on the circuit connecting the first radiating unit and the power divider, and the phase shifter is used to adjust the direction of the first radiating unit and maximize the direction of the first radiating unit. The point at least partially overlaps the minimum point of the pattern of the second radiating unit, and the minimum point of the pattern of the first radiating unit at least partially overlaps the maximum point of the pattern of the second radiating unit. When in use, by adjusting the power divider and phase shifter, the phase difference and amplitude difference between multiple radiating units are changed, so that the directivity of a single radiating unit is reduced, and the pit point of the radiation pattern is reduced, thereby improving the communication of the antenna Effect and enhance user experience.

When the electrical isolation between the radiation units is specifically implemented, different methods can be used. As in a specific embodiment, the minimum distance between the first radiation unit and the second radiation unit is greater than the set distance. That is, the electrical isolation between the radiation units is realized by increasing the separation distance between different radiation units.

In specific settings, the current path length of each radiating unit is between one-eighth and one-half of the wavelength corresponding to the antenna working frequency band.

When the electrical isolation between the radiation units is specifically achieved by distance, the first radiation unit and the second radiation unit may be respectively arranged on different side walls of the mobile terminal. For example, the first radiation unit is arranged on the bottom wall or the top wall of the mobile terminal, and the second radiation unit is arranged on the side wall of the mobile terminal. The first radiation unit and the second radiation unit are respectively arranged on two adjacent side walls of the mobile terminal. Therefore, by arranging different radiating units on different side walls, the separation distance between the radiating units is increased and the electrical isolation effect is ensured.

In addition to the aforementioned distance to achieve electrical isolation between the radiation units, other methods may also be used, such as the first radiation unit and one end of the second radiation unit are electrically connected; and the first radiation unit and the One end of the second radiating unit is grounded; the antenna further includes a decoupling structure for decoupling the two radiating units. The electrical isolation of the first radiating unit and the second radiating unit is realized by the decoupling structure.

When the decoupling structure is specifically set up, the power splitter is coupled to the first radiating unit through a first feeder line, and is coupled to the second radiating unit through a second feeder line; the decoupling structure It includes a metal stub, one end of the metal stub is coupled to the first feeder line, and the other end of the metal stub is coupled to the second feeder line. When the metal stubs are specifically arranged, different structures can be selected for the metal stubs, for example, the metal stubs are microstrip lines, printed circuits or flexible circuits.

When the above decoupling structure is adopted, the distance between the two radiating units can be relatively close, for example, the two radiating units are arranged on the same side wall of the mobile terminal. It is convenient to arrange the radiation unit of the antenna.

When the above-mentioned phase shifter is specifically set, the phase shifter is an adjustable phase shifter, and when the adjustable phase shifter is adjusted to the first setting state, the directional pattern of the first radiating unit is the largest The point coincides with the minimum point of the pattern of the second radiation unit, and the minimum point of the pattern of the first radiation unit coincides with the maximum point of the pattern of the second radiation unit. The phase difference of the signals emitted by different radiating units can be adjusted according to the needs by setting the adjustable phase shifter.

When the above-mentioned power divider is specifically set, the power divider is an adjustable power divider, and when the adjustable power divider is adjusted to the second setting state, the directional pattern of the first radiating unit has a maximum The point is equal to the maximum point of the pattern of the second radiation unit.

In a second aspect, there is also provided a mobile terminal, the mobile terminal comprising a housing and the antenna of any one of the above; wherein the first radiating unit and the second radiating unit are arranged on the side wall of the housing The feeding unit, the power divider and the phase shifter are arranged in the housing. When in use, by adjusting the power divider and phase shifter, the phase difference and amplitude difference between multiple radiating units are changed, so that the directivity of a single radiating unit is reduced, and the pit point of the radiation pattern is reduced, thereby improving the communication of the antenna Effect and enhance user experience.

Description of the drawings

FIG. 1a is a schematic structural diagram of a mobile terminal according to an embodiment of the application;

FIG. 1b is a schematic structural diagram of an antenna provided by an embodiment of this application;

Fig. 1c is a schematic structural diagram of an antenna in the prior art;

2a to 2c are schematic diagrams of simulation of the first radiating unit provided by an embodiment of the application;

3a to 3c are schematic diagrams of simulation of the second radiating unit provided by an embodiment of the application;

4a to 4c are schematic diagrams of simulations of antennas provided by embodiments of this application;

FIG. 5 is a schematic diagram of another structure of an antenna according to an embodiment of the application;

6a to 6c are schematic diagrams of simulation of the first radiating unit provided by an embodiment of the application;

7a to 7c are schematic diagrams of simulation of the second radiating unit provided by an embodiment of the application;

8a to 8c are schematic diagrams of simulations of antennas provided by embodiments of this application;

FIG. 9 is a schematic diagram of another structure of an antenna according to an embodiment of the application;

10a to 10c are schematic diagrams of simulation of the first radiating unit provided by an embodiment of the application;

11a to 11c are schematic diagrams of simulation of the second radiating unit provided by an embodiment of the application;

Figures 12a to 12c are schematic diagrams of simulations of antennas provided by embodiments of this application.

Detailed ways

In order to make the purpose, technical solutions, and advantages of the application more clear, the application will be further described in detail below with reference to the accompanying drawings.

In order to facilitate the understanding of the antenna provided in the embodiments of the present application, firstly, the application scenario is explained. The antenna is applied to a terminal, such as a common terminal such as a notebook computer, a tablet computer, or a mobile phone. With the continuous miniaturization and development of terminals, the headroom on the antenna on the terminal is getting smaller and smaller. Therefore, the embodiment of the present application provides an antenna to improve the performance of the antenna. The following describes the present invention in detail with reference to the drawings and specific embodiments. Apply the antenna provided in the embodiment.

In the antennas provided in the embodiments of the present application, the antennas may be different antennas, such as Wi-Fi antennas, LET antennas, GPS antennas, or other types of antennas.

Referring first to Figure 1a, Figure 1a shows the structure of a mobile terminal. The terminal includes a housing. As shown in Figure 1a, the housing has a metal frame 100. The sidewall 101 of the metal frame 100 has multiple There are two metal segments (not shown in the figure), and there are gaps between the multiple metal segments. When the antenna is set, the metal segment on the housing serves as the radiator of the antenna. As shown in Fig. 1b, the specific structure of the antenna is illustrated in Fig. 1b. The antenna shown in Figure 1b contains two parts, a feeding unit and a radiating unit; the feeding unit is used to feed signals to the radiating unit for emission, or to receive the signal received by the radiating unit, and radiate The unit is used to receive or send signals.

When specifically setting the feeding unit, the feeding unit includes a feeding point 1 and a feeding line connected to the feeding point 1, and the feeding point 1 is connected to the radiating unit through the feeding line. When the feeding unit and the radiating unit are specifically connected, as shown in Figure 1b, the feeding unit corresponds to two radiating units, the first radiating unit 4 and the second radiating unit 5, and the feeding point 1 passes through the first feeding unit. The wire 6 is connected to the first radiating unit 4 and is connected to the second radiating unit 5 through the second feeder 7. It should be understood that, in Figure 1b, only one feed unit corresponds to two radiating units as an example for description, but in the antenna provided in the embodiment of the present application, it is not limited to one feed unit corresponding to two radiating units. It is also possible to use one power feeding unit corresponding to three radiating units, four radiating units, or five radiating units, etc., and it only needs to satisfy that the power feeding unit is connected to at least two radiating units. However, no matter how many radiating units are connected to the power feeding unit, the connection methods are similar. The following takes one power feeding unit to connect two radiating units as an example for description.

When the connection is specifically realized, as shown in FIG. 1b, the feeding unit is connected to the first radiating unit 4 and the second radiating unit 5 through the power divider 2, wherein the power divider 2 is used to adjust the first radiating unit 4. The difference between the maximum point of the directional pattern and the maximum point of the second radiating unit 5 is within the set range. For example, the maximum point of the pattern of the first radiating unit 4 is too large, the power distribution of the power divider 2 can reduce the power of the first radiating unit 4, thereby reducing the maximum point of the pattern of the first radiating unit 4 , So that the maximum point of the combined pattern of the pattern of the first radiation unit 4 and the pattern of the second radiation unit 5 is reduced.

When the power divider 2 is specifically set, the power divider 2 is an adjustable power divider, and the power distribution of different radiating units can be adjusted according to the needs through the adjustable power divider 2. When the adjustable power divider is adjusted to the second setting state, the maximum point of the pattern of the first radiation unit 4 is equal to the maximum point of the pattern of the second radiation unit 5. In addition, when the antenna is at different frequencies, the pattern of each radiating element is different. Therefore, at frequency C, the power ratio C1 can achieve complementary pattern, but at frequency D, the power ratio C1 may not be satisfied, and the power needs to be adjusted. Only D1 can improve the pattern.

In addition, when the power divider 2 is connected to the first radiating unit 4, the first radiating unit 4 is provided with a phase shifter 3, so that the phases of the signals on the two radiating units are different. When in use, the phase shifter 3 is used to adjust the direction of the pattern of the first radiating unit 4 so that the maximum point of the pattern of the first radiating unit 4 and the minimum point of the pattern of the second radiating unit 5 at least partially overlap. The minimum point of the pattern of a radiation unit 4 and the maximum point of the pattern of the second radiation unit 5 at least partially overlap.

For each individual radiating element, there is a maximum point and a minimum point in its pattern. Therefore, in the embodiment of the present application, the first radiation unit and the second radiation unit are used. In an ideal situation, the maximum point of the first radiating element 4 and the minimum point of the second radiating element 5 coincide, and the minimum point of the first radiating element 4 coincides with the maximum point of the second radiating element 5. When the antenna pattern is the roundest. In specific implementation, it is achieved by the cooperation of the above-mentioned power divider 2 and the phase shifter 3. As can be seen from the above description, the function of the power divider 2 adjusts the maximum point of the directional pattern of the first radiation unit 4. The function of the set phase shifter 3 is to adjust the direction (can be understood as rotation) of the pattern of the first radiating unit 4 so that the maximum and minimum points of the pattern are as close as possible to the minimum and maximum points of the second radiating unit 5, thereby Achieve complementarity.

Continuing to refer to Fig. 1b, when the feeding unit is connected to the radiating unit, first, the feeding point 1 is connected to the power divider 2 through a section of feeder line. The power divider 2 uses a one-to-two power divider, and the power divider The power divider 2 is connected to the first radiating unit 4 through the first feeder line 6, and the power divider 2 is connected to the second radiating unit 5 through the second feeder line 7. For the convenience of description, the first radiation unit 4 is referred to as ANT1 for short, and the second radiation unit 5 is referred to as ANT2 for short. Continuing to refer to Fig. 1b, when the power divider 2 is connected to the first radiating unit 4, the power divider 2 is directly connected to the second radiating unit 5 through the second feeder 7 and the power divider 2 is connected to the first radiating unit 4 When connected, the power divider 2 and the first radiating unit 4 are connected through the first feeder line 6, and a phase shifter 3 is provided on the first feeder line 6, so that the first radiating unit 4 and the second radiating unit 5 are connected The phases of the signals are different, and the phase shift amount of the phase shifter 3 can be adjusted so that the radiation patterns of the multiple first radiating units 4 and the second radiating unit 5 are complementary, and the resulting composite pattern has low directivity. When the phase shifter 3 is specifically set, the phase shifter 3 can be used as the phase shifter 3 with different structures such as a microstrip line, a printed circuit, or a metal wire. In an implementable specific solution, a feeder line is provided as the phase shifter 3. At this time, the length of the second feeder line 7 is less than the length of the first feeder line 6, so that the signal is transmitted to the first radiating unit The phases of the signals of 4 and the second radiating unit 5 are different. In addition, in addition to the above-mentioned phase shifter 3, an adjustable phase shifter 3 can also be used. The function of the phase shifter 3 is to adjust the direction of the maximum point and minimum point of the first radiating unit 4 so that the first radiating unit The maximum point of the pattern of 4 and the minimum point of the pattern of the second radiating unit 5 should overlap as much as possible, and the minimum point of the pattern of the first radiating unit 4 should overlap the maximum point of the pattern of the second radiating unit as much as possible to achieve complementarity Effect, thereby reducing the directionality and better roundness of the pattern. Therefore, when the adjustable phase shifter is used, when the adjustable phase shifter is adjusted to the first setting state, the maximum point of the pattern of the first radiating unit 4 coincides with the minimum point of the pattern of the second radiating unit 5, The minimum point of the pattern of the first radiation unit 4 coincides with the maximum point of the pattern of the second radiation unit 5. That is, the adjustable phase shifter 3 can be adjusted to realize the control of the phase of the signal on the first radiation unit 4.

When the first radiation unit 4 and the second radiation unit 5 are specifically arranged, the first radiation unit 4 and the second radiation unit 5 are arranged on the casing of the mobile terminal, or the structure on the casing of the mobile terminal can also be used as radiation unit. For example, when the metal frame in the casing is a metal frame, the metal frame is cut into different metal segments, and the metal segments are used as the first radiation unit 4 and the second radiation unit 5. In addition to the metal frame of the housing, different conductive structures such as printed circuits, flexible circuits, metal wires, metal coatings, etc. can also be used as the first radiating unit 4 and the second radiating unit 5, which can also transmit or receive signals. Effect. In FIG. 1b, slits are formed on the metal frame to form branches as the first radiating unit 4 and the second radiating unit 5. However, it should be understood that FIG. 1b is only used as an example, and the antenna provided in the embodiment of the present application does not limit the specific material and specific structure of the first radiating unit 4 and the second radiating unit 5.

When the first radiating unit 4 and the second radiating unit 5 are specifically set up, the current path length of each radiating unit (the first radiating unit 4 and the second radiating unit 5) is one-eighth of the wavelength corresponding to the working frequency band of the antenna Between one and one-half. Specifically, it may be a quarter of the wavelength corresponding to the working frequency band of the antenna. Wherein, the aforementioned current path length refers to the distance from the open end of the metal branch of the metal frame to the lower point. In addition, the above-mentioned first radiating unit 4 and the second radiating unit 5 are electrically isolated, and the electrical isolation between the first radiating unit 4 and the second radiating unit 5 reaches 15 dB. The radiation units 5 are electrically isolated. In the specific realization of electrical isolation, it can be achieved in different ways, as shown in Figure 1b. In the antenna shown in Figure 1b, the separation distance between the first radiating unit 4 and the second radiating unit 5 is increased. Achieve electrical isolation between the two. At this time, the minimum distance L between the first radiating unit 4 and the second radiating unit 5 is greater than the set distance, where the set distance is the minimum distance that the current on the first radiating unit 4 and the second radiating unit 5 can penetrate For example, the set distance is 15mm, 20mm, 25mm, etc. In the specific implementation, the first radiating unit 4 and the second radiating unit 5 are used to set two different walls of the housing. For the convenience of description, define the four walls of the metal frame as the first side wall and the first side wall. Two side walls, a top wall and a bottom wall, wherein the first side wall is opposite to the second side wall, the top wall is opposite to the bottom wall, and the first side wall is adjacent to the top wall and the bottom wall, and the second side wall is also adjacent to The top wall and the bottom wall are adjacent. As shown in Fig. 1b, the first radiating unit 4 is arranged on the top wall, and the second radiating unit 5 is arranged on the first side wall. Of course, the above figure 1b is only a specific example, it can also be adopted: the first radiation unit 4 is arranged on the top wall, and the second radiation unit 5 is arranged on the bottom wall; the first radiation unit 4 is arranged on the The bottom wall, and the second radiating unit 5 is arranged on the first side wall or the second side wall; the first radiating unit 4 is arranged on the first side wall or the second side wall, and the second radiating unit 5 is arranged on the On the top or bottom wall. Of course, in addition to the above-mentioned arranging the first radiating unit 4 or the second radiating unit 5 on different walls of the housing, the first radiating unit 4 and the second radiating unit 5 can also be arranged on the same wall, such as simultaneously It is installed on the top wall, bottom wall, first side wall or second side wall, but no matter which wall it is installed on, when the first radiation unit 4 and the second radiation unit 5 are installed, the first radiation unit 4 and the second radiation unit The minimum distance between the two radiating units 5 should be less than the set distance required above.

Continuing to refer to Fig. 1b, as shown in Fig. 1b, the first radiating unit 4 is located at the upper left corner of the housing, and the second radiating unit 5 is located on the side. Compared with the antenna in the prior art, as shown in FIG. 1c, the antenna in the prior art includes a feeding unit 10 and a radiating unit 20, and the feeding unit 10 is connected to the radiating unit 20 through a feed line In the prior art, due to the location limitation, the directivity of the radiation pattern is relatively high, and the radiation pattern has obvious depressions at certain angles. The antenna in the prior art using only the first radiating unit 4 is simulated, and the obtained radiation pattern is shown in Figures 2a to 2c. It can be seen from Figures 2a to 2c that the radiation of the antenna in the prior art is The directional pattern will have obvious depressions in different frequency bands. The antenna in the prior art using only the second radiating unit 5 is simulated, and the resulting radiation pattern is shown in Figures 3a to 3c. It can be seen from Figures 3a to 3c that the radiation of the antenna in the prior art is The directional pattern will have obvious depressions in different frequency bands. The antenna shown in Fig. 1b of this application is simulated, and the results are shown in Figs. 3a to 3c. The ANT1 unit and the ANT2 unit are appropriately allocated power and phase configuration and combined into one path. The resulting radiation pattern is shown in Fig. 4a ~ As shown in Figure 4c. It can be seen that in the Wi-Fi frequency band, the radiation pattern of the synthesized single antenna has the best directivity, and the most concave point on the radiation pattern has improved significantly. In the same way, refer to Table 1 together. Table 1 shows the comparison results of the maximum and minimum point directivity of the above three antennas in the radiation pattern.

Table 1

Of course, in addition to the distance shown in FIG. 1b to achieve electrical isolation between the radiating units, other methods can also be used. One end of the first radiating unit 4 and the second radiating unit 5 are electrically connected; and One end of the radiating unit 4 and the second radiating unit 5 electrically connected is grounded; at this time, it can be understood that the two radiating units are integrated and grounded in the middle; in addition, the antenna also includes a device for decoupling the two radiating units Decoupling structure 8. As shown in Figs. 5 and 9, Figs. 5 and 9 show the situation when the first radiating element 4 and the second radiating element 5 of the antenna are located on different side walls. However, the connection mode and decoupling mode of the first radiation unit 4 and the second radiation unit 5 are the same.

First, explain the structure shown in FIG. 5. The first radiation unit 4 and the second radiation unit 5 shown in FIG. 5 are arranged on the first side wall of the housing, and the first radiation unit 4 and the second radiation unit 5 are arranged back-to-back. When set, the first radiating unit 4 and the second radiating unit 5 are both 1/4 wavelength (wavelength corresponding to the antenna working frequency band) branches. In addition, the middle of the first radiating unit 4 and the second radiating unit 5 is connected to the ground through a ground wire, and the two ends of the first radiating unit 4 and the second radiating unit 5 are respectively excited by coupling feeding, as shown in FIG. 5 As shown, the power splitter 2 is coupled to the first radiating unit 4 and the second radiating unit 5 through the first feeder 6 and the second feeder 7 respectively. The decoupling structure 8 includes a metal stub, one end of the metal stub is coupled to the first feeder 6, and the other end of the metal stub is coupled to the second feeder 7. When decoupling is achieved, the currents of the first feeder line 6 and the second feeder line 7 are coupled to the metal stubs and have opposite phases at a certain frequency, so as to cancel each other out to improve isolation. This frequency can be changed by adjusting the coupling amount of the metal stub and the first feeder 6 and the second feeder 7 and the length of the metal stub. The metal branches can choose different structures, such as microstrip lines, printed circuits or flexible circuits. Continuing to refer to FIG. 5, the decoupling structure 8 is formed by the suspended metal branches from the feeding end A to the feeding end B, so that the isolation of the two radiating units can reach a preset value in the Wi-Fi band, such as 15dB.

In order to facilitate understanding of the improvement of the directivity of the antenna provided in the embodiment of the present application in the radiation pattern. Firstly, ANT1 is used to radiate alone, and the radiation pattern is shown in Fig. 6a to Fig. 6c. Similarly, ANT2 is used to radiate alone, and the radiation pattern is shown in Fig. 7a to 7c. In the embodiment of the present application, ANT1 and ANT2 are appropriately distributed and phase configured and combined into one path, and the resulting radiation pattern is shown in FIGS. 8a to 8c. Refer to Table 2 together, which shows the directivities of the maximum and minimum points in the radiation pattern in the three cases. It can be seen from Table 2 that in the Wi-Fi frequency band, the radiation pattern of the antenna provided by the embodiment of the present application has the best directivity, and the most concave point on the radiation pattern is improved.

Table 2

Referring to FIG. 9, the structure shown in FIG. 9 and the structure shown in FIG. 5 only change the positions of the first radiating unit 4 and the second radiating unit 5, and the other structures are not changed. Firstly, ANT1 is used for radiation alone, and its radiation pattern is shown in Fig. 10a to Fig. 10c. Similarly, ANT2 is used for radiation alone, and its radiation pattern is shown in Fig. 11a to Fig. 11c. In the embodiment of the present application, ANT1 and ANT2 are appropriately distributed and phase configured and combined into one path, and the resulting radiation pattern is shown in Figs. 12a to 12c. Refer to Table 3 together, which shows the directivities of the maximum and minimum points in the radiation pattern in the three cases. It can be seen from Table 3 that in the Wi-Fi frequency band, the radiation pattern of the antenna provided by the embodiment of the application has the best directivity, and the most concave point on the radiation pattern is improved.

table 3

It should be understood that, in the above embodiments, only one feeding unit corresponds to two radiating units as an example for description, but in the antenna provided in the embodiment of the present application, it is not limited to one feeding unit corresponding to two radiating units. , It is also possible to use one feeding unit to correspond to different situations such as three radiating units, four radiating units or five radiating units. It is only necessary to ensure the isolation between the set radiating units. At the same time, in the actual use process In this, the circularity and directivity of the antenna can be adjusted by adjusting the power distribution of the power splitter 2 and the phase of the signal input to each radiating unit, which can achieve the effect of improving antenna performance. Therefore, in the antenna provided by the embodiment of the present application, it is satisfied that the feeding unit is connected to at least two radiating units, and the feeding unit is first connected to a power divider 2, and each output terminal of the power divider 2 is connected to a corresponding one. Radiation unit, and when the power divider 2 is connected to the radiation unit, a phase shifter 3 is provided on the circuit connecting at least one radiation unit and the power divider 2, so that the phases of the signals emitted by different radiation units are different. When in use, by adjusting the power splitter 2 and the phase shifter 3, the phase difference and amplitude difference between multiple radiating elements are changed, so that the directivity of a single radiating element is reduced, and the depressed point of the radiation pattern is reduced, thereby improving the antenna Communication effects and enhance user experience.

In addition, the embodiments of the present application also provide a mobile terminal. The mobile terminal may be a common mobile terminal such as a mobile phone, a tablet computer, or a notebook computer. The mobile terminal includes a housing and an antenna of any one of the foregoing; wherein, the first The radiating unit and the second radiating unit are arranged on the side wall of the housing; the feeding unit, the power divider 2 and the phase shifter 3 are arranged in the housing. When in use, by adjusting the power divider 2 and the phase shifter 3, the phase difference and amplitude difference between multiple radiating elements are changed, so that the directivity of a single radiating element is reduced, and the depressed point of the radiation pattern is reduced, thereby improving the antenna Communication effects and enhance user experience.

The above are only specific implementations of this application, but the scope of protection of this application is not limited to this. Anyone familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed in this application, and they should all cover Within the protection scope of this application. Therefore, the protection scope of this application shall be subject to the protection scope of the claims.

Claims

An antenna applied to a mobile terminal, characterized in that the antenna comprises: a feeding unit, a power divider connected to the feeding unit, a first radiating unit and a second radiating unit connected to the power divider respectively Radiating unit, and any two radiating units are electrically isolated; among them,

The power divider is used to adjust the difference between the maximum point of the pattern of the first radiation unit and the maximum point of the pattern of the second radiation unit to be within a set range;

The circuit connecting the first radiating unit and the power divider is provided with a phase shifter, and the phase shifter is used to adjust the direction of the first radiating unit and make the directional pattern of the first radiating unit The maximum point of at least partially overlaps with the minimum point of the pattern of the second radiating unit, and the minimum point of the pattern of the first radiating unit at least partially overlaps the maximum point of the pattern of the second radiating unit.
The antenna according to claim 1, wherein the minimum distance between the first radiation unit and the second radiation unit is greater than a set distance.
The antenna according to claim 1 or 2, wherein the current path length of each radiating element is between one-eighth and one-half of the wavelength corresponding to the working frequency band of the antenna.
The antenna according to claim 2 or 3, wherein the first radiating unit and the second radiating unit are respectively arranged on different side walls of the mobile terminal.
The antenna according to claim 4, wherein the first radiating unit and the second radiating unit are respectively arranged on two adjacent side walls of the mobile terminal.
The antenna according to claim 1, wherein one end of the first radiating unit and the second radiating unit is electrically connected; and an end of the first radiating unit and the second radiating unit is electrically connected to ground ；

The antenna further includes a decoupling structure for decoupling the first radiation unit and the second radiation unit.
7. The antenna according to claim 6, wherein the power splitter is coupled to the first radiating unit through a first feeder, and is coupled to the second radiating unit through a second feeder;

The decoupling structure includes a metal stub, one end of the metal stub is coupled to the first feeder line, and the other end of the metal stub is coupled to the second feeder line.
The antenna according to claim 7, wherein the metal stub is a microstrip line, a printed circuit or a flexible circuit.
The antenna according to claim 6, wherein the two radiating units are arranged on the same side wall of the mobile terminal.
The antenna according to any one of claims 1-9, wherein the phase shifter is an adjustable phase shifter, and when the adjustable phase shifter is adjusted to a first setting state, the first The maximum point of the pattern of a radiation unit coincides with the minimum point of the pattern of the second radiation unit, and the minimum point of the pattern of the first radiation unit coincides with the maximum point of the pattern of the second radiation unit .
The antenna according to any one of claims 1 to 10, wherein the power divider is an adjustable power divider, and when the adjustable power divider is adjusted to a second setting state, the first The maximum point of the pattern of a radiation unit is equal to the maximum point of the pattern of the second radiation unit.
A mobile terminal, comprising a housing and the antenna according to any one of claims 1 to 11; wherein,

The first radiating unit and the second radiating unit are arranged on the side wall of the housing; the feeding unit, the power splitter and the phase shifter are arranged in the housing.