WO2020259663A1

WO2020259663A1 - Foldable mobile terminal and antenna control method

Info

Publication number: WO2020259663A1
Application number: PCT/CN2020/098395
Authority: WO
Inventors: 应李俊; 王岩; 余冬; 尤佳庆; 王汉阳; 刘华涛
Original assignee: 华为技术有限公司
Priority date: 2019-06-28
Filing date: 2020-06-28
Publication date: 2020-12-30
Also published as: CN112151960A

Abstract

Provided are a foldable mobile terminal and an antenna control method. The method comprises: when a mobile terminal is in an unfolded state, a first antenna working in a first frequency range, and a second antenna working in a second frequency range, wherein the first frequency range and the second frequency range are at the same frequency or different frequencies. Therefore, when the mobile terminal is in the unfolded state normal communication is realized. When the mobile terminal is changed from the unfolded state to a folded state, the first antenna works in the first frequency range; the first antenna at least works in a third frequency range, and the third frequency range and the first frequency range are adjacent and do not completely overlap, such that the second antenna becomes an adjustable parasitic branch of the first antenna, thereby completing the normal communication of the mobile terminal in the folded state, and effectively improving the communication performance of the mobile terminal.

Description

Foldable mobile terminal and antenna control method

This application claims the priority of a Chinese patent application filed with the State Intellectual Property Office of China, the application number is 201910579187.8, and the invention title is "Foldable Mobile Terminal and Antenna Control Method" on June 28, 2019, the entire content of which is incorporated by reference In this application.

Technical field

This application relates to the field of electronic technology, and in particular to a foldable mobile terminal and an antenna control method.

Background technique

Generally, mobile terminals need to accommodate one or more antennas of various types in a limited space, such as multiple-input multiple-output (MIMO) antennas, global positioning system (GPS) antennas and wireless Fidelity (wireless-fidelity, WIFI) antenna, Bluetooth antenna, long term evolution (long term evolution, LTE) antenna, etc. As the use requirements for data services gradually increase, the use scenarios of mobile terminals will continue to increase, and the use performance requirements of antennas will also increase.

At present, there are many types of opening and closing states of foldable mobile terminals. However, with the unfolding or folding of the mobile terminal, it is inevitable that the distance between the antennas will be relatively close, which may easily cause signal interference, resulting in a decrease in the performance of the antenna, and thus it is difficult to maintain the normal operation of the mobile terminal.

Summary of the invention

This application provides a foldable mobile terminal and an antenna control method to solve the problem of signal interference caused by the unfolding or folding of the mobile terminal, improve the performance of the antenna, and ensure that the mobile terminal can work normally. The communication performance of the mobile terminal.

In a first aspect, the present application provides a foldable mobile terminal, including: a first antenna and a second antenna disposed on both sides of a rotation axis. The first antenna includes: a first antenna radiator and a first feeding point, and the first antenna radiator receives an electric signal input by the first feeding source through the first feeding point. The second antenna includes: a second antenna radiator, a second feed point, and a second antenna adjustment circuit. The second antenna radiator receives the electrical signal input from the second feed source through the second feed point; the second antenna radiator, The second feeding point and the second antenna adjusting circuit are used to provide multiple operating frequency ranges. When the mobile terminal is in the expanded state, the first antenna works in the first frequency range, the second antenna works in the second frequency range, the first frequency range and the second frequency range are at the same frequency, and the first frequency range is to meet the communication requirements of the mobile terminal The frequency range. When the mobile terminal changes from the expanded state to the folded state, the first antenna works in the first frequency range. According to the first frequency range, through the second antenna adjusting circuit, the second antenna is switched from the second frequency range to the third frequency range to work, and the third frequency range is adjacent to the first frequency range and does not completely overlap.

With the foldable mobile terminal provided by the first aspect, when the mobile terminal is in the unfolded state, the first antenna can be set to work in the first frequency range, the second antenna can be set to work in the second frequency range, and the first frequency range and the second frequency range The frequency range is the same frequency. Since the distance between the first antenna and the second antenna is relatively long, the signals between the first antenna and the second antenna will not interfere with each other, so that the first antenna and the second antenna can each perform corresponding functions and realize movement Normal communication when the terminal is in the expanded state. When the mobile terminal changes from the expanded state to the folded state, the distance between the first antenna and the second antenna will decrease accordingly. The first antenna can be set to work in the first frequency range, and according to the first frequency range, pass the The second antenna adjustment circuit in the two antennas can set the second antenna to switch from the second frequency range to the third frequency range, and the third frequency range is adjacent to the first frequency range and does not completely overlap. In addition, since the second antenna radiator, the second feed point and the second antenna adjustment circuit in the second antenna can provide the second antenna with multiple operating frequency ranges, the second antenna becomes the adjustable of the first antenna. Parasitic stubs avoid the signal interference of the second antenna to the first antenna, and at the same time enhance the signal strength of the first antenna to compensate for the influence brought by the mobile terminal in the folded state, so that the first antenna can meet various communication needs Therefore, the normal communication of the mobile terminal in the reduced state is completed, and the communication performance of the mobile terminal is effectively improved.

In a possible design, the third frequency range is adjacent to the first frequency range and does not overlap, or the third frequency range partially overlaps the first frequency range.

Optionally, the third frequency range and the first frequency range may not overlap at all and the frequency ranges are adjacent, for example, the first frequency range is 890-900 MHz, and the third frequency range is 910-930 MHz. Adjacent here can be understood as: the difference between the maximum frequency value of one of the first frequency range and the third frequency range and the minimum frequency value of the other frequency range is less than or equal to the preset value, where the preset The value can be set according to the actual situation.

Alternatively, the third frequency range and the first frequency range may also partially overlap. For example, the first frequency range is 890-909MHZ, the third frequency range is 885-891MHZ, and the frequency range where the first frequency range and the third frequency range partially overlap are 890～891MHZ.

In a possible design, the second antenna adjusting circuit includes: a plurality of branches, each branch is provided with a second antenna switch and a second matching circuit that are electrically connected, and the second antenna radiator is used for any branch. To provide a working frequency range to adjust the third frequency range. Wherein, the second antenna radiator is electrically connected to the second antenna switch, the second matching circuit, and the second feed source sequentially through the second feed point. And/or, the second antenna radiator is electrically connected to the second matching circuit, the second antenna switch and the second feed source in turn through the second feed point.

Among them, this application does not limit the specific structures of the second antenna switch and the second matching circuit. For example, the second antenna switch may be one switch or multiple switches. Wherein, any switch may be a single-pole multi-throw switch with one input and multiple outputs, or a multi-pole multi-throw switch with multiple inputs and multiple outputs, which is not limited in this application. Any switch can be connected by one or more switches connected in series and/or in parallel, which is not limited in this application. The second matching circuit may use one capacitor, or one inductor, or multiple capacitors connected in series, or multiple inductors connected in series, or multiple capacitors connected in parallel, or multiple inductors connected in parallel, or connected in series. At least one capacitor and at least one inductor, or at least one group of capacitors and inductors connected in series connected in parallel, are not limited in this application.

In a possible design, the second antenna radiator is electrically connected to the second antenna switch, the second matching circuit, and the second ground point in sequence through the second contact point. And/or, the second antenna radiator is electrically connected to the second matching circuit, the second antenna switch and the second ground point in sequence through the second contact point.

In a possible design, when the mobile terminal changes from the expanded state to the folded state, according to the first frequency range, by disconnecting the second antenna switch in the branch where the second antenna radiator is electrically connected to the second feed source , The second antenna switches from the second frequency range to the third frequency range to work.

With the foldable mobile terminal provided by this embodiment, when the mobile terminal changes from the unfolded state to the folded state, the mobile terminal can disconnect the second antenna radiator electrically connected to the second feed source in the second branch. The antenna switch is used to disconnect the second antenna radiator and the second feed source, and according to the first frequency range, set the second antenna to switch from the second frequency range to the third frequency range to work, so that the second antenna It becomes a parasitic stub of the first antenna to prevent the second antenna from interfering with the signal of the first antenna and enhance the signal strength of the first antenna.

In a possible design, when the mobile terminal changes from the expanded state to the folded state, according to the first frequency range, by disconnecting the second antenna switch in the branch where the second antenna radiator is electrically connected to the second feed source , And close the second antenna switch electrically connected to the second matching circuit that provides the third frequency range, and the second antenna switches from the second frequency range to the third frequency range to work.

With the foldable mobile terminal provided by this embodiment, when the mobile terminal changes from the unfolded state to the folded state, the mobile terminal can not only disconnect the connection between the second antenna radiator and the second feed, but also Close the second antenna switch electrically connected to the second matching circuit that provides the third frequency range, and open the remaining second antenna switch in the second antenna adjustment circuit, so that the second antenna is set from the second antenna according to the first frequency range. The frequency range is switched to the third frequency range to work, so that the second antenna becomes a parasitic stub of the first antenna, so as to prevent the second antenna from interfering with the signal of the first antenna and enhance the signal strength of the first antenna.

In a possible design, the mobile terminal further includes: a radio frequency circuit and a switch. Wherein, the first end of the switch is connected to the radio frequency circuit, and the second end of the switch is connected to the second feed source.

In a possible design, when the mobile terminal changes from the expanded state to the folded state, according to the first frequency range, the connection between the second feed source and the radio frequency circuit is disconnected by turning off the switch, and the second antenna changes from the first frequency range. The second frequency range is switched to the third frequency range to work.

With the foldable mobile terminal provided by this embodiment, when the mobile terminal changes from the unfolded state to the folded state, the mobile terminal can disconnect the second antenna adjusting circuit and the radio frequency circuit by opening the switch, and According to the first frequency range, the second antenna is set to switch from the second frequency range to the third frequency range to work, so that the second antenna becomes a parasitic stub of the first antenna, so as to prevent the second antenna from interfering with the signal of the first antenna and strengthen the first antenna. The signal strength of an antenna.

In order to meet the communication requirements of the mobile terminal and facilitate design, the first antenna may adopt the same structure as the second antenna.

In a possible design, the first antenna further includes: a first antenna adjusting circuit. The first antenna adjustment circuit includes: a plurality of branches, each branch is provided with a first antenna switch and a first matching circuit electrically connected, the first antenna radiator and any branch are used to provide an operating frequency range for adjustment The first frequency range. Wherein, the first antenna radiator is electrically connected to the first antenna adjusting circuit and the first feed source sequentially through the first feed point.

In general, the communication requirements of a mobile terminal are related to parameters such as the current location of the mobile terminal and signal coverage strength. Since the first frequency range meets the communication requirements of the mobile terminal, the first frequency range may include multiple frequency ranges.

In a possible design, the first frequency range includes any one of the following frequency ranges: 600-2960 MHz low frequency band, 1710-22200 MHz middle frequency band, and 2300-22700 MHz high frequency band.

In a possible design, the mobile terminal further includes: a first control module. Wherein, the first control module is respectively connected with the first antenna and the second antenna. The first control module is used for controlling the first antenna to work in the first frequency range and the second antenna to work in the second frequency range when the mobile terminal is in the expanded state. The first control module is also used to control the first antenna to work in the first frequency range when the mobile terminal changes from the expanded state to the folded state. According to the first frequency range, the second antenna adjusting circuit is used to control the second antenna to switch from the second frequency range to the third frequency range.

In a second aspect, the present application provides a foldable mobile terminal, including: a first antenna and a second antenna disposed on both sides of a rotation axis. The first antenna includes: a first antenna radiator and a first feeding point, and the first antenna radiator receives an electric signal input by the first feeding source through the first feeding point. The second antenna includes: a second antenna radiator, a second feed point, a second filter circuit, and a second antenna adjustment circuit, the second antenna radiator receives the second feed input through the second feed point and the second filter circuit The second filter circuit presents high impedance characteristics in the first frequency range and the third frequency range and low impedance characteristics in the second frequency range. The first frequency range is a frequency range that meets the communication requirements of the mobile terminal, and the third The frequency range is adjacent to the first frequency range and does not completely overlap. The second antenna radiator is electrically connected to the second grounding point through the second contact point and the second antenna adjustment circuit. The second antenna adjustment circuit exhibits high impedance characteristics in the first frequency range, and low impedance characteristics in the second frequency range. The three frequency ranges present high impedance characteristics and have different degrees of frequency adjustment for the third frequency range. When the mobile terminal is in the expanded state, the first antenna works in a first frequency range, the second antenna works in a second frequency range, and the first frequency range is different from the second frequency range. When the mobile terminal changes from the expanded state to the folded state, the first antenna works in the first frequency range. According to the first frequency range, through the second filter circuit and the second antenna adjusting circuit, the second antenna operates in the second frequency range and the third frequency range.

With the foldable mobile terminal provided by the second aspect, when the mobile terminal is in the unfolded state, the first antenna can be set to work in the first frequency range, the second antenna can be set to work in the second frequency range, and the first frequency range and the second frequency range The frequency range is different. Since the distance between the first antenna and the second antenna is relatively long, the signals between the first antenna and the second antenna will not interfere with each other, so that the first antenna and the second antenna can each perform corresponding functions and realize movement Normal communication when the terminal is in the expanded state. When the mobile terminal changes from the expanded state to the folded state, the distance between the first antenna and the second antenna will decrease accordingly. The first antenna can be set to work in the first frequency range, and according to the first frequency range, pass the The second filter circuit and the second antenna adjustment circuit in the two antennas can be set to continue to work in the second frequency range and the third frequency range, and the third frequency range is adjacent to the first frequency range and does not completely overlap. Also, because the second antenna radiator is electrically connected to the second grounding point through the second contact point and the second antenna adjustment circuit, the third frequency range can be adjusted to varying degrees. Therefore, the second antenna performs its own corresponding function while also becoming The adjustable parasitic stubs of the first antenna are improved, and the signal strength of the first antenna is enhanced on the basis that the first antenna can meet various communication requirements, so as to compensate for the influence brought by the mobile terminal in the folded state, and complete the mobile The normal communication of the terminal in the reduced state effectively improves the communication performance of the mobile terminal.

In a possible design, the second antenna adjustment circuit includes: at least one first branch, each first branch is provided with a second antenna switch and a second matching circuit electrically connected, the second antenna radiator and any The second matching circuit of a first branch exhibits different impedances to adjust the third frequency range. Wherein, the second antenna radiator is electrically connected to the second antenna switch, the second matching circuit and the second ground point in sequence through the second contact point. And/or, the second antenna radiator is electrically connected to the second matching circuit, the second antenna switch and the second ground point in sequence through the second contact point.

With the foldable mobile terminal provided by this implementation manner, the second antenna radiator can be electrically connected to the second antenna adjustment circuit and the second ground point through the second contact point in turn, that is, the impedance of a branch in the second antenna is 0 ohm, so that the second antenna can work in the second frequency range when the mobile terminal is in the expanded state, and because of the existence of the second filter circuit, the second antenna can be turned on when the mobile terminal is in the expanded state. Signals in the frequency range.

In a possible design, when the second antenna works in the second frequency range when the mobile terminal is in the expanded state, when the mobile terminal changes from the expanded state to the folded state, according to the first frequency range, by closing and providing the third The second antenna switch of the second matching circuit of the frequency range is electrically connected, and the second antenna works in the second frequency range and the third frequency range.

With the foldable mobile terminal provided by this embodiment, when the mobile terminal is in the unfolded state, if the second antenna works in the second frequency range, when the mobile terminal changes from the unfolded state to the folded state, the third antenna can be closed and provided. The second antenna switch electrically connected to the second matching circuit of the frequency range, disconnect the remaining second antenna switch in the second antenna adjustment circuit, and set the second antenna to work in the second frequency range and the third frequency range according to the first frequency range The frequency range enables the second antenna to become a parasitic stub of the first antenna while working normally, so as to enhance the signal strength of the first antenna.

In a possible design, the second antenna adjusting circuit further includes: at least one second branch, each second branch is provided with a second matching circuit, the second antenna radiator, and the second branch of any second branch The two matching circuits present different impedances to adjust the third frequency range. Wherein, the second antenna radiator is sequentially electrically connected to the second matching circuit and the second ground point through the second contact point.

With the foldable mobile terminal provided by this embodiment, the second antenna radiator can be sequentially electrically connected to the second antenna adjustment circuit and the second grounding point through the second contact point, and can also be electrically connected to the second matching point through the second contact point. The circuit and the second ground point, that is, there is no branch in the second antenna. The impedance is 0 ohm, so that the second antenna can work in the second frequency range and the fourth frequency range when the mobile terminal is in the unfolded state. Due to the existence of the second filter circuit, the second antenna can conduct signals in the second frequency range and block the signals in the fourth frequency range when the mobile terminal is in the expanded state.

In a possible design, when the second antenna works in the second frequency range and the fourth frequency range when the mobile terminal is in the expanded state, when the mobile terminal changes from the expanded state to the folded state, according to the first frequency range and the first frequency range Four frequency ranges, by closing the second antenna switch electrically connected to the second matching circuit that provides the third frequency range to adjust the fourth frequency range to the third frequency range, the second antenna works in the second frequency range and the third frequency range.

With the foldable mobile terminal provided by this embodiment, when the mobile terminal is in the unfolded state, if the second antenna works in the second frequency range and the fourth frequency range, when the mobile terminal changes from the unfolded state to the folded state, it can pass Close the second antenna switch electrically connected to the second matching circuit providing the third frequency range, open the remaining second antenna switch in the second antenna adjustment circuit, and adjust the fourth frequency range to the third according to the first frequency range The frequency range is to set the second antenna to work in the second frequency range and the third frequency range, so that while the second antenna is working normally, it can also become a parasitic stub of the first antenna to enhance the signal strength of the first antenna.

In general, when the first frequency range is greater than the fourth frequency range, the mobile terminal can adjust the second matching circuit in the second antenna adjustment circuit to be inductive. When the first frequency range is smaller than the fourth frequency range, the mobile terminal can adjust the second matching circuit in the second antenna adjustment circuit to be capacitive.

In a possible design, the first frequency range includes any one of the following frequency ranges: 600-960 MHz low frequency band, 1710-2200 MHz middle frequency band, and 2300-2700 MHz high frequency band.

In a possible design, the mobile terminal further includes: a second control module. Wherein, the second control module is respectively connected with the first antenna and the second antenna. The second control module is used for controlling the first antenna to work in the first frequency range and the second antenna to work in the second frequency range when the mobile terminal is in the expanded state. The second control module is also used for controlling the first antenna to work in the first frequency range when the mobile terminal changes from the expanded state to the folded state. And according to the first frequency range, the second filter circuit and the second antenna adjusting circuit are used to control the second antenna to work in the second frequency range and the third frequency range.

In a third aspect, the present application provides an antenna control method, which is applied to a foldable mobile terminal. The mobile terminal includes: a first antenna and a second antenna arranged on both sides of a rotation axis. The method includes: obtaining the open/close state of the mobile terminal. When the mobile terminal is in the expanded state, the first antenna is controlled to work in the first frequency range, the first frequency range is the frequency range that meets the communication requirements of the mobile terminal, and the second antenna is controlled to work in the second frequency range. The second frequency range has the same frequency, or the first frequency range and the second frequency range have different frequencies. When the mobile terminal is in the folded state and it is determined that the frequency ranges of the first antenna and the second antenna are the same frequency when the mobile terminal is in the expanded state, the first antenna is controlled to work in the first frequency range. According to the first frequency range, the second antenna adjusting circuit is used to control the second antenna to switch from the second frequency range to the third frequency range, and the third frequency range is adjacent to the first frequency range and does not completely overlap. When the mobile terminal is in the folded state and it is determined that when the mobile terminal is in the expanded state, the working frequency ranges of the first antenna and the second antenna are different, controlling the first antenna to work in the first frequency range. According to the first frequency range, the second antenna adjusting circuit is used to control the second antenna to operate in the second frequency range and the third frequency range, and the third frequency range is adjacent to the first frequency range and does not completely overlap.

In a possible design, obtaining the opening and closing state of the mobile terminal includes: obtaining the opening and closing angle of the rotating shaft. Or, obtain the distance between the two housings of the mobile terminal.

For the beneficial effects of the antenna control method provided in the foregoing third aspect and each possible design of the foregoing third aspect, reference may be made to the foregoing first aspect and each possible implementation manner of the first aspect and the foregoing second aspect and second aspect The beneficial effects brought by each possible implementation manner of, will not be repeated here.

Description of the drawings

FIG. 1a is a schematic diagram of the same frequency in the working frequency range of two antennas according to an embodiment of the application;

FIG. 1b is a schematic diagram of the same frequency in the working frequency range of two antennas according to an embodiment of the application;

FIG. 1c is a schematic diagram of the same frequency in the working frequency range of two antennas according to an embodiment of the application;

FIG. 1d is a schematic diagram of the same frequency in the working frequency range of two antennas according to an embodiment of the application;

FIG. 1e is a schematic diagram of different frequencies in the working frequency ranges of two antennas according to an embodiment of the application;

2 is a schematic structural diagram of a foldable mobile terminal in an unfolded state according to an embodiment of the application;

3 is a schematic structural diagram of a foldable mobile terminal in a folded state according to an embodiment of the application;

4 is a schematic structural diagram of a foldable mobile terminal in an unfolded state according to an embodiment of the application;

5 is a schematic structural diagram of a foldable mobile terminal in a folded state according to an embodiment of the application;

6 is a schematic structural diagram of a foldable mobile terminal in an unfolded state provided by an embodiment of the application;

FIG. 7 is a schematic structural diagram of a foldable mobile terminal in a folded state according to an embodiment of the application;

FIG. 8 is a schematic structural diagram of a foldable mobile terminal in an expanded state according to an embodiment of the application;

9 is a schematic structural diagram of a foldable mobile terminal in a folded state according to an embodiment of the application;

FIG. 10 is a schematic diagram of the connection of a second antenna provided by an embodiment of this application;

FIG. 11 is a schematic structural diagram of a foldable mobile terminal in an unfolded state according to an embodiment of the application;

FIG. 12 is a schematic structural diagram of a foldable mobile terminal in a folded state according to an embodiment of the application;

FIG. 13 is a schematic diagram of the connection of the second antenna provided by an embodiment of the application;

FIG. 14 is a schematic diagram of the connection of the second antenna provided by an embodiment of the application;

15 is a curve of the reflection coefficient S11 of the second antenna in the foldable mobile terminal in the folded state provided by an embodiment of the application when there is no parasitic stub of the first antenna and when it becomes a parasitic stub of the first antenna, respectively Schematic diagram

16 is a schematic diagram of the radiation efficiency of the second antenna in the foldable mobile terminal in the folded state provided by an embodiment of the application when it does not become a parasitic stub of the first antenna and when it becomes a parasitic stub of the first antenna. ；

FIG. 17 is a schematic diagram of the system efficiency of the second antenna when there is no parasitic stub of the first antenna and when it becomes the parasitic stub of the first antenna in a foldable mobile terminal in a folded state according to an embodiment of the application. ；

FIG. 18 is a curve of the reflection coefficient S11 of the second antenna when there is no parasitic stub of the first antenna and when it becomes the parasitic stub of the first antenna in a foldable mobile terminal in a folded state provided by an embodiment of the application Schematic diagram

19 is a schematic diagram of the radiation efficiency of the second antenna in the foldable mobile terminal in the folded state provided by an embodiment of the application when there is no parasitic stub of the first antenna and when it becomes a parasitic stub of the first antenna. ；

FIG. 20 is a schematic diagram of the system efficiency of the second antenna when there is no parasitic stub of the first antenna and when it becomes the parasitic stub of the first antenna in a foldable mobile terminal in a folded state according to an embodiment of the application. ；

FIG. 21 is a curve of the reflection coefficient S11 of the second antenna when there is no parasitic stub of the first antenna and when it becomes the parasitic stub of the first antenna in a foldable mobile terminal in a folded state provided by an embodiment of the application Schematic diagram

22 is a schematic diagram of the radiation efficiency of the second antenna in the foldable mobile terminal in the folded state provided by an embodiment of the application when it does not become a parasitic stub of the first antenna and when it becomes a parasitic stub of the first antenna. ；

FIG. 23 is a schematic diagram of the system efficiency of the second antenna when there is no parasitic stub of the first antenna and when it becomes the parasitic stub of the first antenna in a foldable mobile terminal in a folded state provided by an embodiment of the application ；

FIG. 24 is a schematic flowchart of an antenna control method provided by an embodiment of this application;

FIG. 25 is a schematic diagram of the hardware structure of an electronic device provided by an embodiment of the application.

Description of reference signs:

10—the first antenna; 20—the second antenna;

11—first antenna radiator; 12—first feed point; 13—first filter circuit; 14—first antenna adjustment circuit; 15—first contact point;

21—second antenna radiator; 22—second feed point; 23—second filter circuit; 24-second antenna adjustment circuit; 25—second contact point;

241—the second antenna switch; 242—the second matching circuit;

141—the first antenna switch; 142—the first matching circuit;

31—Radio frequency circuit; 32—Changeover switch; 41—First control module; 42—Second control module;

A-A—axis of rotation; B1—first feed; B2—second feed.

Detailed ways

In this application, "at least one" refers to one or more, and "multiple" refers to two or more. "And/or" describes the association relationship of the associated objects, indicating that there can be three relationships, for example, A and/or B, which can mean: A alone exists, A and B exist at the same time, and B exists alone, where A, B can be singular or plural. The character "/" generally indicates that the associated objects are in an "or" relationship. "The following at least one item (a)" or similar expressions refers to any combination of these items, including any combination of a single item (a) or plural items (a). For example, at least one item (a) of a, b, or c can represent: a, b, c, ab, ac, bc, or abc, where a, b, and c can be single or multiple .

The present application provides a foldable mobile terminal. When the mobile terminal is changed from the unfolded state to the folded state, the working frequency range of the antennas arranged on both sides of the rotation axis is adjusted so that one antenna becomes the adjustable parasitic branch of the other antenna , Not only avoids the signal interference between one antenna and the other antenna, but also enhances the signal strength of the other antenna and improves the communication performance of the mobile terminal.

The mobile terminal can be folded along the axis of rotation, and the specific folding method can be left and right folding, up and down folding, diagonal folding or other folding methods at any angle, which is not limited in this application. The mobile terminals mentioned in this application may include, but are not limited to: smart phones, tablets, laptops, routers, optical network terminals (ONT), and wireless access points (wireless access points, APs). .

In this application, since the layout of the antennas in the mobile terminal is set, one or more antennas included on one side of the rotation axis may be used as the above-mentioned antenna, and one or more antennas included on the other side of the rotation axis One antenna can be used as the other antenna described above.

Among them, this application does not limit the specific number and positions of the two antennas, and only needs to satisfy that the two antennas located on both sides of the rotation axis will cause signal interference after the mobile terminal is folded. For example, an antenna may be located on the left side, right side, top side, bottom side, etc. of the mobile terminal. The other antenna can also be located on the left side, right side, top side, bottom side, etc. of the mobile terminal.

In addition, this application does not limit the specific types of the two antennas. For example, the types of two antennas may include one or more of MIMO antennas, Bluetooth antennas, WIFI antennas, and LTE antennas. And the two antennas can be the same type or different types.

In this application, the two antennas can work in any one or more frequency ranges according to actual needs, and the frequency ranges in which the two antennas work can be the same frequency or different frequencies, which is not limited in this application.

Wherein, with reference to FIGS. 1a to 1d, the same frequency range of the two antennas mentioned in this application may include but is not limited to the following situations. For ease of description, in FIGS. 1a to 1d, the frequency range of one antenna is (x1, x2), and the frequency range of the other antenna is (x3, x4).

In a possible situation, as shown in Fig. 1a, the working frequency ranges of the two antennas are exactly the same, that is, x1=x3, x2=x4, then the working frequency ranges of the two antennas are at the same frequency. For example, both antennas work in the B7 (2500-2700MHz) frequency band in LTE.

In another possible situation, as shown in Figure 1b, the working frequency ranges of the two antennas partially overlap, that is, x1<x3, x2<x4, and the overlapped part is (x3, x2), then the working frequencies of the two antennas The range is the same frequency. For example, one antenna works in the B7 (2500-2700MHz) frequency band in LTE, and the other antenna works in the WIFI (2400-2700MHz) frequency band.

In another possible situation, as shown in Figure 1c, the frequency range of one antenna is included in the frequency range of another antenna, that is, x1<x3<x4<x2, (x3, x4) is included in (x1, In x2), the frequency ranges of the two antennas work at the same frequency. For example, one antenna works in the B7 (2500-2700MHz) frequency band and the B1 (1920-2170MHz) frequency band in LTE, and the other antenna works in the B7 (2500-2700MHz) frequency band in LTE.

In another possible situation, as shown in Figure 1d, there is no overlap between the operating frequency range of one antenna and the operating frequency range of the other antenna, and the frequency range of the two antennas is relatively small, then the operating frequency of the two antennas The range is the same frequency. The small interval here can be expressed in the following two feasible ways.

In a feasible way, when the maximum frequency of one antenna working is less than the minimum frequency of another antenna, the actual interval value between the maximum frequency of one antenna and the minimum frequency of the other antenna can be within the preset interval value. Within, the frequency ranges of the two antennas work at the same frequency.

Among them, if x2<x3, the actual interval value is the difference between x3 and x2, that is, x3-x2. If x4<x1, the actual interval value is the difference between x1 and x4, that is, x1-x4. The preset interval value can be set according to actual conditions, which is not limited in this application.

In another feasible way, when the maximum operating frequency of one antenna is less than the minimum operating frequency of another antenna, the actual spacing calculated based on the maximum operating frequency of one antenna and the minimum operating frequency of the other antenna can be preset Within the interval.

Among them, if x2<x3, the actual interval is (x3-x2)/x3, or (x3-x2)/x2. If x4<x1, the actual interval is (x1-x4)/x1, or (x1-x4)/x4. The preset interval can be set according to actual conditions, which is not limited in this application. For example, when the preset interval is 5.3%, one antenna works in the B40 (2300-2400MHz) frequency band in LTE, and the other antenna works in the B7 (2500-2700MHz) frequency band in LTE, and the actual interval is (2500-2400 )/2500=4%<5.3%, then the working frequency range of the two antennas is the same frequency.

Among them, the cases mentioned in the present application that the frequency ranges of the two antennas work with different frequencies include other cases except the frequency ranges where the two antennas work at the same frequency. For ease of description, specific implementations of different frequencies in the working frequency ranges of the two antennas are described with reference to FIG. 1e. In Fig. 1e, the frequency range of one antenna is (x1, x2), and the frequency range of the other antenna is (x3, x4).

As shown in FIG. 1e, there is no overlap between the operating frequency range of one antenna and the operating frequency range of the other antenna, and the operating frequency ranges of the two antennas are separated by a large distance, so the operating frequency ranges of the two antennas are different. The large interval here can be expressed in the following two feasible ways.

In a feasible way, when the maximum frequency of one antenna working is less than the minimum frequency of another antenna, the actual interval value between the maximum frequency of one antenna and the minimum frequency of the other antenna can be within the preset interval value. In addition, the frequency range of the two antennas is different.

In another feasible way, when the maximum operating frequency of one antenna is less than the minimum operating frequency of another antenna, the actual spacing calculated based on the maximum operating frequency of one antenna and the minimum operating frequency of the other antenna can be preset Outside the interval.

Among them, if x2<x3, the actual interval is (x3-x2)/x3, or (x3-x2)/x2. If x4<x1, the actual interval is (x1-x4)/x1, or (x1-x4)/x4). The preset interval can be set according to actual conditions, which is not limited in this application. For example, when the preset interval is 5.3%, one antenna works in the B40 (2300-2400MHz) frequency band in LTE, and the other antenna works in the B1 (1920-2170MHz) frequency band in LTE, and the actual interval is (2300-2170 )/2300=5.6%<5.3%, the frequency ranges of the two antennas are different.

In the following, for ease of description, the mobile terminal takes a mobile phone that is folded up and down along the axis of rotation AA as an example. The two antennas of the mobile terminal are a first antenna located on the lower side of the axis of rotation AA and a second antenna located on the upper side of the axis of rotation AA. Taking an antenna as an example, the technical solution of the foldable mobile terminal of the present application will be described with reference to the embodiments of the present application and the accompanying drawings.

Figures 2, 4, 6 and 8 show schematic diagrams of the structure of the mobile terminal in the unfolded state. Figures 3, 5, 7 and 9 show the translation of the upper and lower half of the mobile terminal in the folded state. Staggered structural schematic diagrams, the left and right side views in Figure 3, Figure 5, Figure 7 and Figure 9 overlap in translation.

It should be noted that both the expanded state and the folded state of the mobile terminal belong to the open and closed state of the mobile terminal. Among them, the expanded state and the folded state can be set according to the opening and closing angle of the mobile terminal, the distance between the two screens (such as the screen a and the screen b) on both sides of the rotation axis A-A, etc., which is not limited in this application.

For example, when the opening and closing angle of the mobile terminal is greater than or equal to a preset angle (such as 60°), the mobile terminal is in the expanded state; otherwise, the mobile terminal is in the folded state. For another example, in screen a and screen b on both sides of the axis of rotation AA, when the distance from screen a to screen b is greater than or equal to the preset length (for example, half of the distance from the axis of rotation AA to the outer frame of screen a), move The terminal is in the expanded state; on the contrary, the mobile terminal is in the folded state.

As shown in FIGS. 2-9, the foldable mobile terminal of the present application may include: a first antenna 10 and a second antenna 20 arranged on both sides of the rotation axis A-A.

Wherein, the specific positions of the first antenna 10 and the second antenna 20 may include multiple types. For ease of description, in FIG. 2, the first antenna 10 is located on the left side of the rotation axis AA of the mobile terminal, and the second antenna 20 is located on the mobile terminal. The left side of the axis of rotation AA. In FIG. 4, the first antenna 10 is located on the left side of the top side of the rotation axis A-A of the mobile terminal, and the second antenna 20 is located on the left side of the rotation axis A-A of the mobile terminal. In FIG. 6, the first antenna 10 is located in the middle of the top edge of the rotation axis A-A of the mobile terminal, and the second antenna 20 is located on the left side of the rotation axis A-A of the mobile terminal. In FIG. 8, the first antenna 10 is located in the middle of the top edge of the rotation axis A-A of the mobile terminal, and the second antenna 20 is located on the right and right side of the bottom edge of the rotation axis A-A of the mobile terminal.

It should be noted that FIGS. 2 to 9 only partially illustrate the positions of the first antenna 10 and the second antenna 20, where the first antenna 10 may also be located at the same time as the first antenna 10 shown in FIGS. 2 and 6 The position, the second antenna 20 may also be located at the position shown by the first antenna 10 in FIG. 2 and FIG. 8, which is not limited in this application.

Based on the above description, since the first antenna 10 and the second antenna 20 work in the same frequency range or different frequencies when the mobile terminal is deployed, the present application can use the first antenna when the mobile terminal is in the deployed state. The scenario where the working frequency bands of the first antenna 10 and the second antenna 20 are at the same frequency is set to scenario 1, and the scenario where the working frequency bands of the first antenna 10 and the second antenna 20 are different in frequency is set to scenario two.

In the following, for scenario one and scenario two, the working process of the mobile terminal in the expanded state and the folded state are respectively described.

scene one:

In this application, as shown in FIGS. 2-9, the first antenna 10 may include: a first antenna radiator 11 and a first feeding point 12. The first antenna radiator 11 receives the electrical signal input from the first feed source B1 through the first feed point 12 to realize the normal operation of the first antenna 10. Among them, the present application limits the number and types of the first antenna radiator 11 and the first feeding point 12.

In this application, as shown in FIGS. 2-9, the second antenna 20 may include: a second antenna radiator 21, a second feeding point 22, and a second antenna adjusting circuit 24. The second antenna radiator 21 receives the electrical signal input by the second feed source B2 through the second feed point 22. The second antenna radiator 21, the second feeding point 22 and the second antenna adjusting circuit 24 are used to provide multiple operating frequency ranges to realize the normal operation of the second antenna 20. Among them, the present application limits the number and types of the second antenna radiator 21, the second feeding point 22, and the second antenna adjusting circuit 24.

In addition, in FIGS. 2-9, the second filter circuit 23 is optional, and is used to conduct signals in the second frequency range on the second antenna radiator 21.

With reference to Figure 2, Figure 4, Figure 6 and Figure 8, when the mobile terminal is in the expanded state, the mobile terminal of this application can set the first antenna 10 to work in the first frequency range, and the second antenna 20 to work in the second frequency range, and The first frequency range and the second frequency range are at the same frequency, where the first frequency range is a frequency range that meets the communication requirements of the mobile terminal, and this application does not limit the specific range of the first frequency range.

As shown in Figures 2, 4, 6 and 8, when the mobile terminal is in the expanded state, since the distance between the first antenna 10 and the second antenna 20 is relatively large, the first antenna 10 and the second antenna When the working frequency range of 20 is the same frequency, the signal interference between the first antenna 10 and the second antenna 20 is small or even no signal interference. As shown in Figures 3, 5, 7 and 9, when the mobile terminal changes from the unfolded state to the folded state, the distance between the first antenna 10 and the second antenna 20 will decrease accordingly. Therefore, the working The first antenna 10 and the second antenna 20 in the same frequency range may have signal interference.

In order to solve the above problem, in conjunction with FIGS. 2-9, when the mobile terminal changes from the expanded state to the folded state, the mobile terminal of the present application may set the first antenna 10 to work in the first frequency range. Moreover, when it is determined that the working frequency range of the first antenna 10 is the first frequency range, the mobile terminal can set the second antenna 20 to switch from the second frequency range to the third frequency range through the second antenna adjustment circuit 24 according to the first frequency range. The frequency range works, and the third frequency range is adjacent to the first frequency range and does not completely overlap.

In this application, according to the positional relationship between the first antenna 10 and the second antenna 20, the third frequency range may be adjacent to the first frequency range and not completely overlapped.

In the present application, when the mobile terminal is in the folded state, the first frequency range may change with the change of the frequency range of the communication requirements of the mobile terminal, so that the first antenna 10 can meet various communication requirements. Since the third frequency range is obtained based on the first frequency range, the third frequency range changes as the first frequency range changes. Also, because the third frequency range is adjacent to the first frequency range and does not completely overlap, and the second antenna radiator 21, the second feeding point 22, and the second antenna adjustment circuit 24 in the second antenna 20 can be directed to the second antenna 20 provides multiple operating frequency ranges. Therefore, the second antenna 20 becomes an adjustable parasitic stub of the first antenna 10 to avoid signal interference between the second antenna 20 and the first antenna 10, and at the same time, the first antenna 10 The signal is enhanced to compensate for the impact brought by the mobile terminal in the reduced state.

In the foldable mobile terminal provided by the present application, when the mobile terminal is in the unfolded state, the first antenna can be set to work in a first frequency range, and the second antenna can be set to work in a second frequency range, and the first frequency range and the second frequency range Same frequency. Since the distance between the first antenna and the second antenna is relatively long, the signals between the first antenna and the second antenna will not interfere with each other, so that the first antenna and the second antenna can each perform corresponding functions and realize movement Normal communication when the terminal is in the expanded state. When the mobile terminal changes from the expanded state to the folded state, the distance between the first antenna and the second antenna will decrease accordingly. The first antenna can be set to work in the first frequency range, and according to the first frequency range, pass the The second antenna adjustment circuit in the two antennas can set the second antenna to switch from the second frequency range to the third frequency range, and the third frequency range is adjacent to the first frequency range and does not completely overlap. In addition, since the second antenna radiator, the second feed point and the second antenna adjustment circuit in the second antenna can provide the second antenna with multiple operating frequency ranges, the second antenna becomes the adjustable of the first antenna. Parasitic stubs avoid the signal interference of the second antenna to the first antenna, and at the same time enhance the signal strength of the first antenna to compensate for the influence brought by the mobile terminal in the folded state, so that the first antenna can meet various communication needs Therefore, the normal communication of the mobile terminal in the reduced state is completed, and the communication performance of the mobile terminal is effectively improved.

On the basis of the foregoing embodiment, the second antenna adjusting circuit 24 may include multiple implementation manners, which are not limited in this application. Optionally, the second antenna adjusting circuit 24 may include: a plurality of branches, each branch is provided with a second antenna switch 241 and a second matching circuit 242 electrically connected, the second antenna radiator 21 and any branch Used to provide a working frequency range to adjust the third frequency range.

The specific structure of the second antenna switch 241 and the second matching circuit 242 is not limited in this application. For example, the second antenna switch 241 may be one switch or multiple switches. Wherein, any switch may be a single-pole multi-throw switch with one input and multiple outputs, or a multi-pole multi-throw switch with multiple inputs and multiple outputs, which is not limited in this application. Any switch can be connected by one or more switches connected in series and/or in parallel, which is not limited in this application. The second matching circuit 242 may adopt one capacitor, or one inductor, or multiple capacitors connected in series, or multiple inductors connected in series, or multiple capacitors connected in parallel, or multiple inductors connected in parallel, or connected in series. At least one capacitor and at least one inductor, or at least one group of capacitors and inductors connected in parallel, which are not limited in this application.

It should be noted that in this application, the second matching circuit 242 in each branch can be set to different impedances to provide different operating frequency ranges, or the second matching circuit 242 in each branch can be set to The same impedance to simplify the design.

In this application, the second antenna radiator 21 may be electrically connected to the second antenna adjusting circuit 24 and the second feed source B2 through the second feed point 22 in turn. Since the connection sequence of the second antenna switch 241 and the second matching circuit 242 may include multiple types, a variety of possible connection methods are used below to describe the specific connection relationship of the second antenna adjustment circuit 24 in the present application.

In a possible connection manner, the second antenna radiator 21 may be electrically connected to the second antenna switch 241, the second matching circuit 242, and the second feed source B2 through the second feed point 22 in sequence.

In another possible connection manner, the second antenna radiator 21 may also be electrically connected to the second matching circuit 242, the second antenna switch 241, and the second feed source B2 through the second feed point 22, as shown in FIG. 10 . For ease of description, this connection method is used for example in FIG. 10.

Another possible connection In the above, the above two connection modes can exist at the same time.

On the basis of the foregoing description, optionally, in conjunction with FIG. 10, the second antenna 20 may further include: a second contact point 25 and a second ground point (identified by a ground symbol in FIG. 10). Wherein, the second antenna radiator 21 may also be electrically connected to the second antenna adjusting circuit 24 and the second ground point through the second contact point 25 in turn.

Since the connection sequence of the second antenna switch 241 and the second matching circuit 242 may include multiple types, a variety of possible connection methods are used below to describe the specific connection relationship of the second antenna adjustment circuit 24 in the present application.

In a possible connection manner, the second antenna radiator 21 is electrically connected to the second antenna switch 241, the second matching circuit 242, and the second ground point in sequence through the second contact point 25.

In another possible connection manner, the second antenna radiator 21 is electrically connected to the second matching circuit 242, the second antenna switch 241, and the second ground point in sequence through the second contact point 25, as shown in FIG. 10. For ease of description, this connection method is used for example in FIG. 10.

In another possible connection mode, the above two connection modes can exist at the same time.

In this application, all mobile terminals can use the second antenna adjusting circuit 24 to make the second antenna 20 work in the third frequency range according to the first frequency range. Based on the above-mentioned connection relationship of the second antenna adjusting circuit 24, below, for scenario 1, three possible implementation manners are used to exemplarily describe the specific implementation manner for the mobile terminal to implement the second antenna 20 operating in the third frequency range.

In a possible implementation, based on the connection relationship of the second antenna adjustment circuit 24 in FIG. 10, when the mobile terminal changes from the expanded state to the folded state, the mobile terminal can disconnect the second antenna radiator 21 from the second feeder. The second antenna switch 241 in the branch where the source B2 is electrically connected to disconnect the second antenna radiator 21 and the second feed source B2, and according to the first frequency range, set the second antenna from the second The frequency range is switched to the third frequency range for operation, so that the second antenna 20 becomes a parasitic stub of the first antenna 10 to prevent the second antenna 20 from interfering with the signal of the first antenna 10 and enhance the signal strength of the first antenna 10.

In another possible implementation manner, on the basis of the foregoing implementation manner, based on the connection relationship of the second antenna adjustment circuit 24 in FIG. 10, when the mobile terminal changes from the unfolded state to the folded state, the mobile terminal may not only disconnect the second antenna In addition to the connection between the two antenna radiators 21 and the second feed B2, the second antenna switch 241 that is electrically connected to the second matching circuit 242 providing the third frequency range can be closed, and the second antenna adjustment can be disconnected. The remaining second antenna switch 241 in the circuit 24 is configured to switch the second antenna 20 from the second frequency range to the third frequency range to work according to the first frequency range, so that the second antenna 20 becomes a parasitic branch of the first antenna 10 In order to prevent the second antenna 20 from interfering with the signal of the first antenna 10 and enhance the signal strength of the first antenna 10.

It should be noted that there may be one or more second matching circuits 242 that provide the third frequency range mentioned above, which is not limited in this application. Correspondingly, the aforementioned second antenna switches 241 electrically connected to the second matching circuit 242 providing the third frequency range are all the second antenna switches 241 electrically connected to one or more second matching circuits 242.

In another possible implementation manner, no matter what connection relationship is adopted by the second antenna adjusting circuit 24, as shown in FIGS. 11-12, the mobile terminal may further include: a radio frequency circuit 31 and a switch 32. The first end of the switch 32 is connected to the radio frequency circuit 31, and the second end of the switch 32 is connected to the second antenna adjusting circuit 24.

In this application, as shown in FIG. 12, when the mobile terminal changes from the unfolded state to the folded state, the mobile terminal can disconnect the second antenna adjusting circuit 24 and the radio frequency circuit 31 by turning off the switch 32. And according to the first frequency range, the second antenna 20 is set to switch from the second frequency range to the third frequency range to work, so that the second antenna 20 becomes a parasitic stub of the first antenna 10 to prevent the second antenna 20 from interfering with the first antenna 10 and strengthen the signal strength of the first antenna 10.

Exemplarily, based on the embodiments shown in FIGS. 2 to 12, the mobile terminal may further include: a first control module 41 (not shown in FIGS. 2 to 12), wherein the first control module 41 respectively It is connected to the first antenna 10 and the second antenna 20.

Optionally, the first control module 41 can be connected to the first antenna switch 141 in the first antenna adjustment circuit 14 to control the closing and opening of the first antenna switch 141, or can be connected to the switch 32 to control switching The closing and opening of the switch 32 can also be connected to the first antenna switch 141 and the switch 32 at the same time to control the closing and opening of the first antenna switch 141 and the switch 32 at the same time, which is not limited in this application.

Optionally, the first control module 41 can be connected to the second antenna switch 241 in the second antenna adjustment circuit 24 to control the closing and opening of the second antenna switch 241, or can be connected to the switch 32 to control the switching. The closing and opening of the switch 32 can also be connected to the second antenna switch 141 and the switch 32 at the same time to control the closing and opening of the second antenna switch 241 and the switch 32 at the same time, which is not limited in this application.

Among them, the application does not limit the specific type and quantity of the first control module 41. Optionally, in the present application, the same first control module 41 may be used to connect to the first antenna 10 and the second antenna 20, or multiple first control modules 41 may be used to connect to the first antenna 10 and the second antenna 20, respectively. , This application does not limit this. In addition, the first control module 41 may be an existing processor in the mobile terminal, or a newly-added module in the mobile terminal, which is not limited in this application.

In this application, the first control module 41 can control the first antenna 10 to work in the first frequency range and control the second antenna 20 to work in the second frequency range when the mobile terminal is in the expanded state. In addition, the first control module 41 can also control the first antenna 10 to operate in the first frequency range when the mobile terminal changes from the expanded state to the folded state, and control the first antenna 10 through the second antenna adjusting circuit 24 according to the first frequency range. The two antennas 20 switch from the second frequency range to the third frequency range to work.

It should be noted that the first control module 41 can realize the above process by controlling the closing or opening of the first antenna switch 141, and the closing or opening of the second antenna switch 241 and/or the switch 32. For details, please refer to Mobile The description process of controlling the working frequency range of the first antenna 10 and the second antenna 20 when the terminal is in the expanded state and controlling the working frequency range of the first antenna 10 and the second antenna 20 when the mobile terminal changes from the expanded state to the folded state is not here. Do repeat.

Exemplarily, on the basis of the above-mentioned embodiments shown in FIG. 2 to FIG. 12, in general, the communication requirements of the mobile terminal are related to parameters such as the current location of the mobile terminal and the signal coverage strength. Since the first frequency range meets the communication requirements of the mobile terminal, the first frequency range may include multiple frequency ranges. Optionally, the first frequency range includes any one of the following frequency ranges: a low frequency band of 600-960 MHz, a middle frequency band of 1710-2200 MHz, and a high frequency band of 2300-2700 MHz.

Based on the above description, in order to meet the communication requirements of the mobile terminal, the first antenna 10 may adopt the same structure as the second antenna 20. On the basis of the embodiments shown in FIGS. 2 to 12, optionally, the first antenna 10 may include, in addition to the first antenna radiator 11 and the first feeding point 12, a first antenna adjustment circuit 14 (not shown in Figure 2-Figure 12). The first antenna adjusting circuit 14 may include multiple implementation manners, which are not limited in this application.

Optionally, the first antenna adjustment circuit 14 may include: a plurality of branches, each branch is provided with a first antenna switch 141 and a first matching circuit 142 that are electrically connected, the first antenna radiator 11 and any branch Used to provide an operating frequency range to adjust the first frequency range.

For the specific content of the first antenna switch 141, please refer to the description content of the second antenna switch 241 above, which will not be repeated here. For the specific content of the first matching circuit 142, please refer to the description of the above-mentioned second matching circuit 242, which will not be repeated here.

In this embodiment, the first antenna radiator 11 may be electrically connected to the first antenna adjusting circuit 14 and the first feed source B1 through the first feed point 12 sequentially. Since the connection sequence of the first antenna switch 141 and the first matching circuit 142 can include multiple types, refer to the connection sequence of the second antenna switch 241 and the second matching circuit 242 in the second antenna adjustment circuit 24 for details, which will not be described here. Repeat.

On the basis of the above description, optionally, the first antenna 10 may further include: a first contact point 15 (not shown in Figures 2 to 12) and a first ground point (not shown in Figures 2 to 12) ). Wherein, the first antenna radiator 11 may also be electrically connected to the first antenna adjusting circuit 24 and the first ground point through the first contact point 15 in turn. Since the connection sequence of the first antenna switch 141 and the first matching circuit 142 can include multiple types, refer to the connection sequence of the second antenna switch 241 and the second matching circuit 242 in the second antenna adjustment circuit 24 for details, which will not be described here. Repeat.

In addition, optionally, the first antenna 10 may further include: a first filter circuit 13 (not shown in FIGS. 2 to 12), configured to conduct signals in the first frequency range on the first antenna radiator 11.

Scene two:

In the present application, as shown in FIGS. 2-9, the second antenna 20 may include: a second antenna radiator 21, a second feeding point 22, a second filter circuit 23, and a second antenna adjustment circuit 24. The second antenna radiator 21 receives the electrical signal input from the second feed B2 (not shown in FIGS. 2-9) through the second feed point 22 and the second filter circuit 23.

The second filter circuit 23 exhibits high impedance characteristics in the first frequency range and the third frequency range, and exhibits low impedance characteristics in the second frequency range. That is, the second filter circuit 23 can perform the first frequency range and the third frequency range. The signal in the second frequency range has a blocking effect, and the second filter circuit 23 can have a conductive effect on the signal in the second frequency range.

Among them, the specific content of the first frequency range in scenario 2 may refer to the description content of the first frequency range in scenario 1. The first frequency range is a frequency range that meets the communication requirements of the mobile terminal, and will not be repeated here.

For the specific content of the third frequency range in the second scenario, please refer to the description content of the third frequency range in the first scenario. The third frequency range is adjacent to the first frequency range and does not completely overlap, and will not be repeated here.

The second antenna radiator 21 is electrically connected to the second ground point (not shown in FIGS. 2-9) through the second contact point 25 (not shown in FIGS. 2-9) and the second antenna adjusting circuit 24. The second antenna adjustment circuit 24 exhibits high impedance characteristics in the first frequency range, low impedance characteristics in the second frequency range, high impedance characteristics in the third frequency range, and has different degrees of frequency adjustment for the third frequency range. In other words, the second antenna adjustment circuit 24 can block signals in the first frequency range and the third frequency range, conduct signals in the second frequency range, and at the same time also block signals in the third frequency range. The signal has different degrees of frequency regulation.

Among them, the present application limits the number and types of the second antenna radiator 21, the second feed point 22, the second filter circuit 23, and the second antenna adjustment circuit 24.

With reference to Figure 2, Figure 4, Figure 6 and Figure 8, when the mobile terminal is in the expanded state, the mobile terminal of this application can set the first antenna 10 to work in the first frequency range, and the second antenna 20 to work in the second frequency range, and The first frequency range is different from the second frequency range.

As shown in Figures 2, 4, 6 and 8, when the mobile terminal is in the expanded state, since the distance between the first antenna 10 and the second antenna 20 is relatively large, the first antenna 10 and the second antenna When the working frequency range of 20 is different, the signal between the first antenna 10 and the second antenna 20 has no interference. As shown in Figure 3, Figure 5, Figure 7 and Figure 9, when the mobile terminal changes from the expanded state to the folded state, the distance between the first antenna 10 and the second antenna 20 will decrease accordingly, but it is precisely because The frequency ranges in which the first antenna 10 and the second antenna 20 work are different frequencies. Therefore, there is no signal interference between the first antenna 10 and the second antenna 20.

In order to enhance the signal strength of the first antenna 10, in conjunction with FIGS. 2-9, when the mobile terminal changes from the expanded state to the folded state, the mobile terminal of the present application may set the first antenna 10 to work in the first frequency range. Moreover, when it is determined that the working frequency range of the first antenna 10 is the first frequency range, the mobile terminal of the present application performs signal blocking and signal conduction through the second filter circuit 23 according to the first frequency range, and the second antenna adjustment circuit 24 for signal blocking and signal adjustment, not only can the second antenna 20 continue to work in the second frequency range, but also the second antenna 20 can be adjusted to work in the third frequency range, and the third frequency range is adjacent to and adjacent to the first frequency range. Does not overlap completely.

In the present application, when the mobile terminal is in the folded state, the first frequency range may change with the change of the frequency range of the communication requirements of the mobile terminal, so that the first antenna 10 can meet various communication requirements. Since the third frequency range is obtained based on the first frequency range, the third frequency range changes as the first frequency range changes. Also, because the third frequency range is adjacent to the first frequency range and does not completely overlap, and the second antenna radiator 21, the second feed point 22, the second filter circuit 23, and the second antenna adjustment circuit in the second antenna 20 24 can ensure that the second antenna 20 continues to work in the second frequency range. At the same time, the second antenna radiator 21 in the second antenna 20 can also be electrically connected to the second antenna through the second contact point 25 and the second antenna adjustment circuit 24. The grounding point realizes different degrees of frequency adjustment to the third frequency range. Therefore, the second antenna 20 can not only ensure its own normal operation, but also can become an adjustable parasitic stub of the first antenna 10. Furthermore, the second antenna 20 is While completing its own functions, it can also avoid signal interference to the first antenna 10, and at the same time enhance the signal of the first antenna 10 to compensate for the impact brought by the mobile terminal in the folded state.

In the foldable mobile terminal provided by the present application, when the mobile terminal is in the unfolded state, the first antenna can be set to work in a first frequency range, and the second antenna can be set to work in a second frequency range, and the first frequency range and the second frequency range Different frequency. Since the distance between the first antenna and the second antenna is relatively long, the signals between the first antenna and the second antenna will not interfere with each other, so that the first antenna and the second antenna can each perform corresponding functions and realize movement Normal communication when the terminal is in the expanded state. When the mobile terminal changes from the expanded state to the folded state, the distance between the first antenna and the second antenna will decrease accordingly. The first antenna can be set to work in the first frequency range, and according to the first frequency range, pass the The second filter circuit and the second antenna adjustment circuit in the two antennas can be set to continue to work in the second frequency range and the third frequency range, and the third frequency range is adjacent to the first frequency range and does not completely overlap. Also, because the second antenna radiator is electrically connected to the second grounding point through the second contact point and the second antenna adjustment circuit, the third frequency range can be adjusted to varying degrees. Therefore, the second antenna performs its own corresponding function while also becoming The adjustable parasitic stubs of the first antenna are improved, and the signal strength of the first antenna is enhanced on the basis that the first antenna can meet various communication requirements, so as to compensate for the influence brought by the mobile terminal in the folded state, and complete the mobile The normal communication of the terminal in the reduced state effectively improves the communication performance of the mobile terminal.

On the basis of the foregoing embodiment, the second antenna adjusting circuit 24 may include multiple implementation manners, which are not limited in this application. Optionally, as shown in FIG. 13, the second antenna adjustment circuit 24 may include: at least one first branch (illustrated by four first branches in FIG. 13), and each first branch is provided with an electrical connection The second antenna switch 241 and the second matching circuit 242, the second antenna radiator 21 and the second matching circuit 242 of any one of the first branches present different impedances to adjust the third frequency range.

For the specific content of the second antenna switch 241 in the second scenario, please refer to the description content of the second antenna switch 241 in the first scenario, which will not be repeated here. For the specific content of the second matching circuit 242 in the second scenario, refer to the description of the second matching circuit 242 in the first scenario, which will not be repeated here.

In the present application, the second antenna radiator 21 can be electrically connected to the second antenna adjusting circuit 24 and the second ground point in turn through the second contact point 25, that is, the impedance of a branch in the second antenna 20 is 0 ohm, so that The second antenna 20 can work in the second frequency range when the mobile terminal is in the expanded state, and it is precisely because of the existence of the second filter circuit 23 that the second antenna 20 can be turned on to the second frequency when the mobile terminal is in the expanded state. Signal within range.

For ease of description, in FIG. 13, the second antenna radiator 21 can be electrically connected to the second matching circuit 242, the second antenna switch 241, and the second feed source B2 through the second contact point 25, and the second matching circuit 242 and There are two branches where the second antenna switch 241 is located for example.

In a possible connection manner, the second antenna radiator 21 may be electrically connected to the second antenna switch 241, the second matching circuit 242, and the second ground point in sequence through the second contact point 25.

In another possible connection manner, the second antenna radiator 21 may be electrically connected to the second matching circuit 242, the second antenna switch 241, and the second ground point in sequence through the second contact point 25, as shown in FIG. For ease of description, Figure 13 uses this connection method for example.

On the basis of the foregoing description, optionally, as shown in FIG. 13, the second antenna radiator 21 may also be electrically connected to the second adjusting circuit 24 and the second adjusting circuit 24 through the second feeding point 22 and the second filter circuit 23. Feed B2.

Wherein, the present application does not limit the connection sequence between the second antenna switch 241 and the second matching circuit 242 in the second antenna adjustment circuit 24. For ease of description, in FIG. 13, the second antenna radiator 21 can be electrically connected to the second matching circuit 242, the second antenna switch 241, and the second feed source B2 through the second feed point 22 and the second filter circuit 23 in sequence. In addition, there are two branches where the second matching circuit 242 and the second antenna switch 241 are located for example.

Based on the above-mentioned connection relationship of the second antenna adjusting circuit 24, in conjunction with FIG. 13, optionally, when the mobile terminal is in the expanded state, if the second antenna 20 is operating in the second frequency range, the mobile terminal changes from the expanded state to the folded state At this time, by closing the second antenna switch 241 electrically connected to the second matching circuit 242 providing the third frequency range, the remaining second antenna switch 241 in the second antenna adjusting circuit 24 can be opened, and according to the first frequency range, The second antenna is set to work in the second frequency range and the third frequency range, so that while the second antenna 20 is working normally, it can also become a parasitic stub of the first antenna 10 to enhance the signal strength of the first antenna 10.

On the basis of the embodiment shown in FIG. 13 and in conjunction with FIG. 14, the second antenna adjusting circuit 24 may further include: at least one second branch (shown as a second branch in FIG. 14), and each second branch A second matching circuit 242 is provided on the road, and the second antenna radiator 21 and the second matching circuit 242 of any second branch exhibit different impedances to adjust the third frequency range.

In the present application, the second antenna radiator 21 may be electrically connected to the second antenna adjusting circuit 24 and the second grounding point through the second contact point 25, and may also be electrically connected to the second matching circuit 242 and the second ground point through the second contact point 25. Two ground points, that is, there is no branch in the second antenna 20. The impedance is 0 ohm, so that the second antenna 20 can work in the second frequency range and the fourth frequency range when the mobile terminal is in the expanded state, and it is precisely because The existence of the second filter circuit 23 enables the second antenna 20 to conduct signals in the second frequency range and block signals in the fourth frequency range when the mobile terminal is in the expanded state.

Based on the above-mentioned connection relationship of the second antenna adjustment circuit 24, in conjunction with FIG. 14, optionally, when the mobile terminal is in the expanded state, if the second antenna 20 is operating in the second frequency range and the fourth frequency range, the mobile terminal will start from the expanded state. When the state becomes the folded state, the second antenna switch 241 electrically connected to the second matching circuit 242 that provides the third frequency range can be closed, and the remaining second antenna switch 241 in the second antenna adjustment circuit 24 can be opened, and according to In the first frequency range, adjust the fourth frequency range to the third frequency range to set the second antenna to work in the second frequency range and the third frequency range, so that the second antenna 20 can also become the first antenna while working normally 10 parasitic branches to enhance the signal strength of the first antenna 10.

Generally, when the first frequency range is greater than the fourth frequency range, the mobile terminal can adjust the second matching circuit 242 in the second antenna adjustment circuit 24 to be inductive. When the first frequency range is smaller than the fourth frequency range, the mobile terminal can adjust the second matching circuit 242 in the second antenna adjusting circuit 24 to be capacitive.

Exemplarily, on the basis of the above-mentioned embodiments shown in FIGS. 2-9 and 13-14, the mobile terminal may further include: a second control module 42 (not shown in FIGS. 2-9 and 13-14) For illustration), the second control module 42 is connected to the first antenna 10 and the second antenna 20 respectively.

The second control module 42 can be connected to the first antenna switch 141 in the first antenna adjustment circuit 14 to control the closing and opening of the first antenna switch 141, and can also be connected to the second antenna switch 141 in the second antenna adjustment circuit 24. The antenna switch 241 is connected to control the closing and opening of the second antenna switch 241.

Among them, this application does not limit the specific type and quantity of the second control module 42. Optionally, in the present application, the same second control module 42 may be used to connect to the first antenna 10 and the second antenna 20, or multiple second control modules 42 may be used to connect to the first antenna 10 and the second antenna 20, respectively. , This application does not limit this. In addition, the second control module 42 may be an existing processor in the mobile terminal, or may be a newly added module in the mobile terminal, which is not limited in this application.

In this application, the second control module 42 can control the first antenna 10 to work in the first frequency range and control the second antenna 20 to work in the second frequency range when the mobile terminal is in the expanded state. In addition, the second control module 42 can also control the first antenna 10 to work in the first frequency range when the mobile terminal changes from the expanded state to the folded state, and according to the first frequency range, through the second filter circuit 23 and the second antenna The adjusting circuit 24 controls the second antenna 20 to work in the second frequency range and the third frequency range.

It should be noted that the second control module 42 can realize the above process by controlling the first antenna switch 141 and the second antenna switch 241 to close or open. For details, please refer to controlling the first antenna 10 and the second antenna when the mobile terminal is in the unfolded state. The working frequency range of the two antennas 20 and the description process of controlling the working frequency range of the first antenna 10 and the second antenna 20 when the mobile terminal changes from the expanded state to the folded state will not be repeated here.

Exemplarily, on the basis of the embodiments shown in FIGS. 2-9 and 13-14, in general, the communication requirements of the mobile terminal are related to parameters such as the current location of the mobile terminal and the signal coverage strength. Since the first frequency range meets the communication requirements of the mobile terminal, the first frequency range may include multiple frequency ranges. Optionally, the first frequency range includes any one of the following frequency ranges: 600-960 MHz low frequency band, 1710-2200 MHz middle frequency band, and 2300-2700 MHz high frequency band.

Based on the above description, in order to meet the communication requirements of the mobile terminal, the first antenna 10 may adopt the same structure as the second antenna 20. On the basis of the embodiments shown in FIGS. 2-9 and 13-14, optionally, the first antenna 10 may include the first antenna radiator 11 and the first feeding point 12, and may also include : The first antenna adjusting circuit 14 (not shown in Figures 2-9 and 13-14). The first antenna adjusting circuit 14 may include multiple implementation manners, which are not limited in this application.

On the basis of the above description, optionally, the first antenna 10 may further include: a first contact point 15 (not shown in Figures 2-9 and 13-14) and a first ground point (Figure 2- (Not shown in Figure 9, Figure 13-14). Wherein, the first antenna radiator 11 may also be electrically connected to the first antenna adjusting circuit 24 and the first ground point through the first contact point 15 in turn. Since the connection sequence of the first antenna switch 141 and the first matching circuit 142 can include multiple types, refer to the connection sequence of the second antenna switch 241 and the second matching circuit 242 in the second antenna adjustment circuit 24 for details, which will not be described here. Repeat.

In addition, optionally, the first antenna 10 may further include: a first filter circuit 13 (not shown in FIGS. 2-9 and 13-14) for conducting the first antenna on the first antenna radiator 11. Signals in the frequency range.

In a specific embodiment, in the mobile terminal shown in FIGS. 2 to 3, the first antenna 10 is set as the main antenna of the mobile terminal, and the second antenna 20 is set as the auxiliary antenna of the mobile terminal. Regardless of scenario one or scenario two, with reference to Figures 15-17, when the mobile terminal is in the folded state, the second antenna 20 does not become a parasitic stub of the first antenna 10 and the second antenna 20 becomes a parasitic of the first antenna 10. In these two cases, the reflection coefficient S11, radiation efficiency and system efficiency of the second antenna 20 are explained and analyzed respectively.

Among them, the reflection coefficient S11 is one of the S parameters (that is, the scattering parameter), which represents the return loss characteristics. Generally, the dB value and impedance characteristics of the loss are viewed through a network analyzer. This parameter indicates how well the antenna is matched with the front-end circuit. The larger the value of the reflection coefficient S11, the greater the energy reflected by the antenna itself, and the worse the matching of the antenna. For example, the S11 value of antenna A at a certain frequency point is -1, the S11 value of antenna B at the same frequency point is -3, and the matching degree of antenna B is better than that of antenna A.

FIG. 15 shows a schematic diagram of the reflection coefficient S11 when the second antenna 20 does not become a parasitic stub of the first antenna 10 and when the second antenna 20 becomes a parasitic stub of the first antenna 10 when the mobile terminal is in the folded state.

Wherein, the abscissa of FIG. 15 is frequency, the unit is GHz, and the ordinate is the reflection coefficient S11, the unit is dBa. The solid line "1" represents the curve of the reflection coefficient S11 when the second antenna 20 does not become a parasitic stub of the first antenna 10, and the solid line "2～3" represents that the second antenna 20 becomes the two types of the first antenna 10. Curves of reflection coefficient S11 corresponding to parasitic branches of different lengths.

What is used in Fig. 15 is that the parasitic coupling area is the strong current point, also called the magnetic coupling parasitic. Taking the solid line "2" in Figure 15 as an example, the resonance at the 680MHz frequency point is a parasitic resonance, and the resonance at the 930MHz frequency point belongs to the resonance range of the main antenna body. Compared with the solid line "1", the main resonance Due to the influence of parasitic resonance, it shifts to high frequency and becomes very deep.

FIG. 16 shows a schematic diagram of the radiation efficiency of the second antenna 20 when the second antenna 20 does not become a parasitic stub of the first antenna 10 and when it becomes a parasitic stub of the first antenna 10 when the mobile terminal is in the folded state.

Wherein, the abscissa of FIG. 16 is frequency (frequency), the unit is GHz, and the ordinate is efficiency (efficiency), the unit is dBp. The solid line "1" indicates the corresponding radiation efficiency curve when the second antenna 20 does not become a parasitic stub of the first antenna 10, and the solid line "2～3" indicates that the second antenna 20 becomes two different types of the first antenna 10 The radiation efficiency curve corresponding to the length of the parasitic stub.

According to any one of the solid lines "2～3" shown in Figure 16, it can be seen that the parasitic resonance will increase the radiation efficiency of the main resonance in the frequency range of 0.85～0.95GHz, which is about 1.4dB of radiation efficiency improvement ( The increase in radiation efficiency is usually related to the environment).

FIG. 17 shows a schematic diagram of the system efficiency when the second antenna 20 does not become a parasitic stub of the first antenna 10 and when it becomes a parasitic stub of the first antenna 10 when the mobile terminal is in the folded state.

Wherein, the abscissa of FIG. 17 is frequency (frequency), the unit is GHz, and the ordinate is efficiency (efficiency), the unit is dBp. The solid line "1" represents the curve of the system efficiency corresponding to the second antenna 20 when it does not become the parasitic stub of the first antenna 10, and the solid line "2～3" represents the two different types of the second antenna 20 when it becomes the first antenna 10. The curve of the system efficiency corresponding to the length of the parasitic stub.

According to any one of the solid lines "2～3" shown in Figure 17, it can be seen that the parasitic resonance will increase the system efficiency of the main resonance in the frequency range of 0.85～0.9GHz, which is about 2～3dB of system efficiency improvement. .

Based on the above described process, when the mobile terminal is in the folded state, compared with the case where the second antenna 20 does not become a parasitic stub of the second antenna 20, when the second antenna 20 becomes a parasitic stub of the second antenna 20, the The reflection coefficient S11, radiation efficiency, and system efficiency of the two antennas 20 will all be improved, which enhances the signal strength of the first antenna 10 and improves the communication performance of the first antenna 10.

In another specific embodiment, in the mobile terminal shown in FIGS. 4 and 5, the first antenna 10 is set as the main antenna of the mobile terminal, and the second antenna 20 is set as the auxiliary antenna of the mobile terminal. Regardless of scene one or scene two, with reference to Figures 18-20, when the mobile terminal is in the folded state, the second antenna 20 does not become a parasitic stub of the first antenna 10 and the second antenna 20 becomes a parasitic of the first antenna 10. In these two cases, the reflection coefficient S11, radiation efficiency and system efficiency of the second antenna 20 are explained and analyzed respectively.

FIG. 18 shows a schematic diagram of the reflection coefficient S11 when the second antenna 20 does not become a parasitic stub of the first antenna 10 and when it becomes a parasitic stub of the first antenna 10 when the mobile terminal is in the folded state.

Wherein, the abscissa of FIG. 18 is frequency (frequency), the unit is GHz, and the ordinate is the reflection coefficient S11, the unit is dBa. The solid line "1" represents the curve of the corresponding S parameter when the second antenna 20 does not become the parasitic stub of the first antenna 10, and the solid line "2～3" represents the two different types of the second antenna 20 when it becomes the first antenna 10. The curve of reflection coefficient S11 corresponding to the length of the parasitic stubs.

The difference from the previous specific embodiment is that the parasitic coupling area used in FIG. 18 is a strong electric field point, also called electric field coupling parasitic. In Fig. 18, the main resonance is the high frequency in the frequency range of 0.85～0.9GHz, as shown in the frequency point of 1GHz in Fig. 18. That is, the resonant frequency of the parasitic stub in Fig. 15 is smaller than the resonant frequency of the main antenna, and the resonant frequency of the parasitic stub in Fig. 18 is greater than the resonant frequency of the main antenna.

FIG. 19 shows a schematic diagram of the radiation effect and system efficiency of the second antenna 20 when the mobile terminal is in the folded state when it does not become a parasitic stub of the first antenna 10 and when it becomes a parasitic stub of the first antenna 10.

Among them, the abscissa of Fig. 19 is frequency, the unit is GHz, and the ordinate is efficiency, the unit is dBp. The solid line "1" represents the corresponding radiation efficiency curve when the second antenna 20 does not become a parasitic stub of the first antenna 10, and the solid line "2～3" represents the two different types of the second antenna 20 when it becomes the first antenna 10. The radiation efficiency curve corresponding to the length of the parasitic stub.

As shown in Figure 19, the parasitic resonance will increase the radiation efficiency of the main resonance within a certain frequency range, which is about 1.7 to 2dB.

FIG. 20 shows a schematic diagram of the system efficiency when the second antenna 20 does not become a parasitic stub of the first antenna 10 and when it becomes a parasitic stub of the first antenna 10 when the mobile terminal is in the folded state.

Wherein, the abscissa of FIG. 20 is frequency (frequency), the unit is GHz, and the ordinate is efficiency (efficiency), the unit is dBp. The solid line "1" represents the curve of the system efficiency corresponding to the second antenna 20 when it does not become the parasitic stub of the first antenna 10, and the solid line "2～3" represents the two different types of the second antenna 20 when it becomes the first antenna 10. The curve of the system efficiency corresponding to the length of the parasitic stub.

As shown in Figure 20, the parasitic resonance will increase the system efficiency of the main resonance within a certain frequency range, which is about a 2dB increase in system efficiency.

Based on the above described process, when the mobile terminal is in the folded state, compared with the case where the second antenna 20 does not become a parasitic stub of the main antenna, when the second antenna 20 becomes a parasitic stub of the first antenna 10, the second antenna The reflection coefficient S11, radiation efficiency, and system efficiency of 20 will all be improved, which enhances the signal level of the first antenna 10 and improves the communication performance of the first antenna 10.

In another specific embodiment, in the mobile terminal shown in FIGS. 8 and 9, the first antenna 10 is set as the main antenna of the mobile terminal, and the second antenna 20 is set as the auxiliary antenna of the mobile terminal. Regardless of scenario one or scenario two, with reference to Figures 21-23, when the mobile terminal is in the folded state, the second antenna 20 does not become a parasitic stub of the first antenna 10 and the second antenna 20 becomes a parasitic of the first antenna 10. In these two cases, the reflection coefficient S11, radiation efficiency and system efficiency of the second antenna 20 are explained and analyzed respectively.

FIG. 21 shows a schematic diagram of the reflection coefficient S11 when the second antenna 20 does not become a parasitic stub of the first antenna 10 and when it becomes a parasitic stub of the first antenna 10 when the mobile terminal is in the folded state.

Wherein, the abscissa of FIG. 21 is frequency, the unit is GHz, and the ordinate is the reflection coefficient S11, the unit is dBa. The solid line "1" represents the curve of the corresponding S parameter when the second antenna 20 does not become the parasitic stub of the first antenna 10, and the solid line "2～3" represents the two different types of the second antenna 20 when it becomes the first antenna 10. The curve of reflection coefficient S11 corresponding to the length of the parasitic stubs.

In Figure 21, the target resonant frequency range of the main antenna is set between 1.7 and 1.88 GHz. Taking the solid line "2" as an example, the resonance at the frequency point of 1.7 to 1.88 GHz is a parasitic resonance, which is comparable to the solid line "1". In contrast, the main resonance becomes deep due to the influence of parasitic resonance.

22 shows a schematic diagram of the radiation efficiency of the second antenna 20 when the second antenna 20 does not become a parasitic stub of the first antenna 10 and when it becomes a parasitic stub of the first antenna 10 when the mobile terminal is in the folded state.

Wherein, the abscissa of Fig. 22 is frequency (frequency), the unit is GHz, and the ordinate is efficiency (efficiency), the unit is dBp. The solid line "1" represents the corresponding radiation efficiency curve when the second antenna 20 does not become the parasitic stub of the first antenna 10, and the solid line "2" represents the second antenna 20 when it becomes the two different lengths of the first antenna 10. The radiation efficiency curve corresponding to each parasitic branch.

As shown in Figure 22, the target resonant frequency range of the main antenna is between 1.7 and 1.88 GHz, and the parasitic resonance will increase the radiation efficiency of the main resonance in this frequency range. In addition, when the working frequency band of the main antenna is switched and changed, the parasitic resonance will follow the switching working frequency band, which will still increase the radiation frequency of the main antenna within the target frequency range.

FIG. 23 shows a schematic diagram of the system efficiency when the second antenna 20 does not become a parasitic stub of the first antenna 10 and when it becomes a parasitic stub of the first antenna 10 when the mobile terminal is in the folded state.

Wherein, the abscissa of Fig. 23 is frequency (frequency), the unit is GHz, and the ordinate is efficiency (efficiency), the unit is dBp. The solid line "1" represents the curve of the system efficiency when the second antenna 20 does not become the parasitic stub of the first antenna 10, and the solid line "2" represents the second antenna 20 when it becomes two different lengths of the first antenna 10. The curve of the system efficiency corresponding to each parasitic branch.

As shown in Figure 23, the resonant frequency range of the main antenna is between 1.7 and 1.88 GHz, and the parasitic resonance will improve the system efficiency of the main resonance in this frequency range. In addition, when the operating frequency band of the main antenna is switched and changed, the parasitic resonance will follow the switching of the operating frequency band, which will still increase the system frequency of the main antenna within the target frequency range.

In addition, based on the above three specific embodiments, in this application, the first antenna 10 may not only include an antenna radiator, but also may be in the form of a parasitic stub and an antenna radiator, regardless of whether the first antenna 10 is deployed on the mobile terminal. The working frequency range when the state changes to the folded state is in any frequency range in the low, medium and high frequencies. The second antenna 20 can use one or more antenna radiators at any position in the mobile terminal, so that the one or more antenna radiators become Parasitic branch of the first antenna 10.

Exemplarily, this application also provides an antenna control method. FIG. 24 is a schematic flowchart of an antenna control method provided by an embodiment of this application. The antenna control method of this application can be implemented by the control module in the mobile terminal shown in FIGS. 1a to 23 through software and/or hardware. As shown in FIG. 24, the antenna control method of the present application may include:

S101. Acquire the open/close state of the mobile terminal.

In this application, when the mobile terminal is in different opening and closing states, the working frequency ranges of the first antenna and the second antenna are different, so the mobile terminal needs to obtain the opening and closing states of the mobile terminal. Therefore, when the mobile terminal is in the expanded state, step S102 is executed; when the mobile terminal is in the folded state, step S103 is executed.

Among them, this application may adopt multiple methods to determine the open and close state of the mobile terminal. In the following, two specific implementation manners are adopted to describe in detail the specific process of obtaining the open and closed state of the mobile terminal in S101.

In a feasible implementation manner, the opening and closing angle of the rotating shaft is obtained. For example, when the opening and closing angle meets the preset angle, it is determined that the mobile terminal is in the folded state. When the opening and closing angle does not meet the preset angle, it is determined that the mobile terminal is in an expanded state. Among them, the preset angle can be set according to actual conditions, such as greater than or equal to 60°.

In another feasible implementation manner, the distance between the two housings of the mobile terminal is obtained. For example, when the distance meets a preset threshold, it is determined that the mobile terminal is in a reduced state. When the distance does not meet the preset threshold, it is determined that the mobile terminal is in an expanded state. Among them, the preset threshold can be set according to actual conditions, such as less than or equal to half of the length of any shell.

It should be noted that this application is not limited to the above-mentioned method for determining the opening and closing state of the mobile terminal.

S102. Control the first antenna to work in a first frequency range, where the first frequency range is a frequency range that meets the communication requirements of the mobile terminal, and control the second antenna to work in a second frequency range, where the first frequency range and the second frequency range are at the same frequency Or, the first frequency range and the second frequency range are different in frequency.

In this application, when the mobile terminal determines that the mobile terminal is in the expanded state, according to actual communication conditions, it can control the frequency range of the first antenna and the second antenna to work at the same frequency, or control the frequency range of the first antenna and the second antenna. Different frequencies are not limited in this application.

Among them, the same frequency and different frequencies can be referred to the description of Figure 1a to Figure 1e above, and will not be repeated here.

S103: Determine whether the working frequency ranges of the first antenna and the second antenna are the same frequency when the mobile terminal is in the expanded state.

In this application, whether the frequency ranges of the first antenna and the second antenna work at the same frequency when the mobile terminal is in the expanded state will affect the frequency ranges of the first antenna and the second antenna when the mobile terminal is in the folded state. Therefore, when the mobile terminal determines that the mobile terminal is in the folded state, it can determine whether the frequency ranges of the first antenna and the second antenna are the same frequency when the mobile terminal is in the expanded state.

Therefore, when the first antenna and the second frequency range have the same frequency, S104 is executed; when the first antenna and the second frequency range are different in frequency, S105 is executed.

S104. Control the first antenna to work in the first frequency range, and control the second antenna to switch from the second frequency range to the third frequency range to work according to the first frequency range through the second antenna adjustment circuit, the third frequency range and the first frequency range A frequency range is adjacent and does not completely overlap.

In this application, when the first antenna and the second frequency range are at the same frequency, the mobile terminal can control the operating frequency range of the second antenna to be adjacent to and not completely overlap with the operating frequency range of the first antenna, so that the second antenna is switched to the first antenna. A parasitic branch of an antenna.

Optionally, the third frequency range is adjacent to the first frequency range and does not overlap, or the third frequency range partially overlaps the first frequency range.

S105. Control the first antenna to work in the first frequency range, and control the second antenna to work in the second frequency range and the third frequency range through the second antenna adjustment circuit according to the first frequency range. The frequency ranges are adjacent and do not completely overlap.

In this application, the mobile terminal has different frequencies between the first antenna and the second frequency range, which can ensure the normal operation of the second antenna. At the same time, it can also control the frequency range of the second antenna to be adjacent to the frequency range of the first antenna. The incomplete overlap allows the second antenna to work normally and complete the corresponding functions, and at the same time the second antenna is switched to become a parasitic stub of the first antenna.

For the setting process of the first frequency range, please refer to the above-mentioned description content of this application, which will not be repeated here.

The antenna control method provided in this application can implement the above-mentioned mobile terminal embodiments. For specific implementation principles and technical effects, please refer to the technical solutions of the above-mentioned embodiments shown in FIG. 1a to FIG. 23, which will not be repeated here.

Exemplarily, an embodiment of the present application further provides an electronic device. FIG. 25 is a schematic diagram of the hardware structure of an electronic device provided by an embodiment of the application. As shown in FIG. 25, the electronic device 100 is used to implement any of the foregoing methods. The example corresponds to the operation of the control module in the mobile terminal through software and/or hardware. The mobile terminal includes but is not limited to smart phones, tablet computers, portable computers, routers, optical network terminals (ONT), and wireless Access point (wireless access point, AP) and other terminals. The electronic device 100 of the embodiment of the present application may include: a memory 101 and a processor 102. The memory 101 and the processor 102 may be connected through a bus 103.

The memory 101 is used to store program codes;

The processor 102 calls the program code, and when the program code is executed, it is used to execute the antenna control method in any of the foregoing embodiments. For details, refer to the related description in the foregoing method embodiment.

Optionally, the embodiment of the present application further includes a communication interface 104, and the communication interface 104 may be connected to the processor 102 through the bus 103. The processor 102 can control the communication interface 103 to implement the above-mentioned receiving and sending functions of the electronic device 100.

The electronic device of the present application can be used to execute the technical solutions in the foregoing method embodiments, and its implementation principles and technical effects are similar, and will not be repeated here.

In the several embodiments provided in this application, it should be understood that the disclosed device and method may be implemented in other ways. For example, the device embodiments described above are only illustrative. For example, the division of modules is only a logical function division. In actual implementation, there may be other division methods. For example, multiple modules can be combined or integrated into another. A system or some features can be ignored or not implemented. In addition, the displayed or discussed mutual coupling or direct coupling or communication connection may be indirect coupling or communication connection through some interfaces, devices or modules, and may be in electrical, mechanical or other forms.

The modules described as separate components may or may not be physically separate, and the components displayed as modules may or may not be physical units, that is, they may be located in one place, or they may be distributed on multiple network units. Some or all of the modules may be selected according to actual needs to achieve the objectives of the solutions of the embodiments of the present application.

In addition, the functional modules in the various embodiments of the present application may be integrated into one processing unit, or each module may exist alone physically, or two or more modules may be integrated into one unit. The units formed by the above-mentioned modules can be realized in the form of hardware, or in the form of hardware plus software functional units.

The above-mentioned integrated modules implemented in the form of software function modules may be stored in a computer readable storage medium. The above-mentioned software function module is stored in a storage medium, and includes several instructions to make a computer device (which can be a personal computer, a server, or a network device, etc.) or a processor (English: processor) execute the method of each embodiment of the present application Part of the steps.

It should be understood that the foregoing processor may be a central processing unit (CPU), or other general-purpose processors, digital signal processors (digital signal processors, DSP), and application specific integrated circuits (ASICs). Wait. The general-purpose processor may be a microprocessor or the processor may also be any conventional processor or the like. The steps of the method disclosed in combination with the invention can be directly embodied as executed by a hardware processor, or executed by a combination of hardware and software modules in the processor.

The memory may include a high-speed RAM memory, and may also include a non-volatile storage NVM, such as at least one disk storage, and may also be a U disk, a mobile hard disk, a read-only memory, a magnetic disk, or an optical disk.

The bus may be an industry standard architecture (ISA) bus, a peripheral component (PCI) bus, or an extended industry standard architecture (EISA) bus. The bus can be divided into address bus, data bus, control bus, etc. For ease of representation, the buses in the drawings of this application are not limited to only one bus or one type of bus.

The present application also provides a readable storage medium in which an execution instruction is stored. When at least one processor of an electronic device executes the execution instruction, the electronic device executes the antenna control method in the foregoing method embodiment.

The present application also provides a chip, which is connected to a memory, or a memory is integrated on the chip, and when the software program stored in the memory is executed, the antenna control method in the foregoing method embodiment is implemented.

This application also provides a program product, which includes an execution instruction, and the execution instruction is stored in a readable storage medium. At least one processor of the electronic device can read the execution instruction from a readable storage medium, and the execution of the execution instruction by the at least one processor causes the electronic device to implement the antenna control method in the foregoing method embodiment.

A person of ordinary skill in the art can understand that: in the above-mentioned embodiments, it may be implemented in whole or in part by software, hardware, firmware, or any combination thereof. When implemented by software, it can be implemented in the form of a computer program product in whole or in part. The computer program product includes one or more computer instructions. When the computer program instructions are loaded and executed on the computer, the processes or functions according to the embodiments of the present application are generated in whole or in part. The computer can be a general-purpose computer, a dedicated computer, a computer network, or other programmable devices. Computer instructions can be stored in a computer-readable storage medium, or transmitted from one computer-readable storage medium to another computer-readable storage medium. For example, computer instructions can be transmitted from a website, computer, server, or data center through a cable (such as Coaxial cable, optical fiber, digital subscriber line (DSL)) or wireless (such as infrared, wireless, microwave, etc.) means to transmit to another website, computer, server or data center. A computer-readable storage medium may be any available medium that can be accessed by a computer or a data storage device such as a server or data center integrated with one or more available media. The usable medium may be a magnetic medium (for example, a floppy disk, a hard disk, and a magnetic tape), an optical medium (for example, a DVD), or a semiconductor medium (for example, a solid state disk (SSD)).

Claims

A foldable mobile terminal, characterized by comprising: a first antenna and a second antenna arranged on both sides of a rotation axis;

The first antenna includes: a first antenna radiator and a first feed point, and the first antenna radiator receives an electrical signal input by a first feed source through the first feed point;

The second antenna includes: a second antenna radiator, a second feed point, and a second antenna adjustment circuit, the second antenna radiator receives the electrical signal input by the second feed source through the second feed point, The second antenna radiator, the second feed point, and the second antenna adjustment circuit are used to provide multiple operating frequency ranges;

When the mobile terminal is in the expanded state, the first antenna works in a first frequency range, the second antenna works in a second frequency range, and the first frequency range and the second frequency range are at the same frequency, so The first frequency range is a frequency range that meets the communication requirements of the mobile terminal;

When the mobile terminal changes from the expanded state to the folded state, the first antenna works in the first frequency range; according to the first frequency range, the second antenna is adjusted from the second antenna through the second antenna adjustment circuit. The second frequency range is switched to work in a third frequency range, and the third frequency range is adjacent to the first frequency range and does not completely overlap.
The mobile terminal according to claim 1, wherein:

The third frequency range is adjacent to and does not overlap with the first frequency range, or the third frequency range partially overlaps with the first frequency range.
The mobile terminal according to claim 1 or 2, wherein the second antenna adjustment circuit comprises: a plurality of branches, and each branch is provided with a second antenna switch and a second matching circuit electrically connected, so The second antenna radiator and any branch are used to provide a working frequency range to adjust the third frequency range;

Wherein, the second antenna radiator is electrically connected to the second antenna switch, the second matching circuit, and the second feed source in sequence through the second feed point; and/or,

The second antenna radiator is electrically connected to the second matching circuit, the second antenna switch, and the second feed source sequentially through the second feeding point.
The mobile terminal according to claim 3, wherein the second antenna radiator is electrically connected to the second antenna switch, the second matching circuit, and the second ground point in sequence through a second contact point; and/ or,

The second antenna radiator is electrically connected to the second matching circuit, the second antenna switch and the second ground point in sequence through a second contact point.
The mobile terminal according to claim 3 or 4, wherein:

When the mobile terminal changes from the expanded state to the folded state, according to the first frequency range, by disconnecting the second antenna switch in the branch where the second antenna radiator is electrically connected to the second feed source , The second antenna is switched from the second frequency range to the third frequency range to work.
The mobile terminal according to claim 5, wherein:

When the mobile terminal changes from the expanded state to the folded state, according to the first frequency range, by disconnecting the second antenna switch in the branch where the second antenna radiator is electrically connected to the second feed source , And close the second antenna switch electrically connected to the second matching circuit providing the third frequency range, and the second antenna switches from the second frequency range to the third frequency range to operate.
The mobile terminal according to any one of claims 1-6, wherein the mobile terminal further comprises: a radio frequency circuit and a switch;

Wherein, the first end of the switch is connected to the radio frequency circuit, and the second end of the switch is connected to the second feed source.
The mobile terminal according to claim 7, wherein:

When the mobile terminal changes from the unfolded state to the folded state, according to the first frequency range, the connection between the second feed source and the radio frequency circuit is disconnected by turning off the switch. The two antennas are switched from the second frequency range to the third frequency range for operation.
The mobile terminal according to any one of claims 1-8, wherein the first antenna further comprises: a first antenna adjustment circuit; the first antenna adjustment circuit comprises: a plurality of branches, each branch An electrically connected first antenna switch and a first matching circuit are provided on the road, and the first antenna radiator and any branch are used to provide an operating frequency range to adjust the first frequency range;

Wherein, the first antenna radiator is electrically connected to the first antenna adjusting circuit and the first feed source sequentially through the first feeding point.
The mobile terminal according to any one of claims 1-9, wherein the first frequency range includes any one of the following frequency ranges:

600～960MHz low frequency band, 1710～2200MHz middle frequency band and 2300～2700MHz high frequency band.
The mobile terminal according to any one of claims 1-10, wherein the mobile terminal further comprises: a first control module;

Wherein, the first control module is respectively connected to the first antenna and the second antenna;

The first control module is configured to control the first antenna to work in the first frequency range and the second antenna to work in the second frequency range when the mobile terminal is in an expanded state;

The first control module is further configured to control the first antenna to work in the first frequency range when the mobile terminal changes from the expanded state to the folded state; and pass the first frequency range according to the first frequency range. The second antenna adjusting circuit controls the second antenna to switch from the second frequency range to the third frequency range to work.
A foldable mobile terminal, characterized by comprising: a first antenna and a second antenna arranged on both sides of a rotation axis;

The first antenna includes: a first antenna radiator and a first feed point, and the first antenna radiator receives an electrical signal input by a first feed source through the first feed point;

The second antenna includes a second antenna radiator, a second feeding point, a second filter circuit, and a second antenna adjusting circuit, and the second antenna radiator passes through the second feeding point and the second antenna. The filter circuit receives the electrical signal input by the second feed source. The second filter circuit exhibits high impedance characteristics in the first frequency range and the third frequency range and low impedance characteristics in the second frequency range. The first frequency range is A frequency range that meets the communication requirements of the mobile terminal, where the third frequency range is adjacent to the first frequency range and does not completely overlap; the second antenna radiator passes through a second contact point and the second antenna The adjustment circuit is electrically connected to the second ground point, and the second antenna adjustment circuit exhibits high impedance characteristics in the first frequency range, low impedance characteristics in the second frequency range, and high impedance in the third frequency range Characteristics and have different degrees of frequency adjustment for the third frequency range;

When the mobile terminal is in the expanded state, the first antenna works in the first frequency range, the second antenna works in the second frequency range, the first frequency range and the second frequency range Different frequency

When the mobile terminal changes from the expanded state to the folded state, the first antenna works in the first frequency range; according to the first frequency range, the second filter circuit and the second antenna adjustment circuit , The second antenna works in the second frequency range and the third frequency range.
The mobile terminal according to claim 12, wherein:

The third frequency range is adjacent to and does not overlap with the first frequency range, or the third frequency range partially overlaps with the first frequency range.
The mobile terminal according to claim 12 or 13, wherein the second antenna adjustment circuit comprises: at least one first branch, and each first branch is provided with an electrically connected second antenna switch and a second antenna switch. A matching circuit, where the second antenna radiator and the second matching circuit of any one of the first branches present different impedances to adjust the third frequency range;

Wherein, the second antenna radiator is electrically connected to the second antenna switch, the second matching circuit, and the second ground point in sequence through the second contact point; and/or,

The second antenna radiator is electrically connected to the second matching circuit, the second antenna switch, and the second ground point in sequence through the second contact point.
The mobile terminal according to claim 14, wherein when the second antenna works in the second frequency range when the mobile terminal is in an expanded state,

When the mobile terminal changes from the expanded state to the folded state, according to the first frequency range, by closing the second antenna switch electrically connected to the second matching circuit that provides the third frequency range, the second antenna works In the second frequency range and the third frequency range.
The mobile terminal according to claim 14, wherein the second antenna adjustment circuit further comprises: at least one second branch, each second branch is provided with the second matching circuit, and the second The antenna radiator and the second matching circuit of any one of the second branches present different impedances to adjust the third frequency range;

Wherein, the second antenna radiator is electrically connected to the second matching circuit and the second ground point sequentially through the second contact point.
The mobile terminal according to claim 16, wherein when the second antenna works in the second frequency range and the fourth frequency range when the mobile terminal is in an expanded state,

When the mobile terminal changes from the expanded state to the folded state, according to the first frequency range and the fourth frequency range, by closing the second antenna switch electrically connected to the second matching circuit that provides the third frequency range , To adjust the fourth frequency range to the third frequency range, and the second antenna works in the second frequency range and the third frequency range.
The mobile terminal according to any one of claims 12-17, wherein the first antenna further comprises: a first antenna adjustment circuit; the first antenna adjustment circuit comprises: a plurality of branches, each branch An electrically connected first antenna switch and a first matching circuit are provided on the road, and the first antenna radiator and any branch are used to provide an operating frequency range to adjust the first frequency range;

Wherein, the first antenna radiator is electrically connected to the first antenna adjusting circuit and the first feed source sequentially through the first feeding point.
The mobile terminal according to any one of claims 12-18, wherein the first frequency range includes any one of the following frequency ranges:

600～960MHz low frequency band, 1710～2200MHz middle frequency band and 2300～2700MHz high frequency band.
The mobile terminal according to any one of claims 12-19, wherein the mobile terminal further comprises: a second control module;

Wherein, the second control module is respectively connected to the first antenna and the second antenna;

The second control module is configured to control the first antenna to work in the first frequency range and control the second antenna to work in the second frequency range when the mobile terminal is in an expanded state;

The second control module is also used to control the first antenna to work in the first frequency range when the mobile terminal changes from the expanded state to the folded state; The second filter circuit and the second antenna adjusting circuit control the second antenna to work in the second frequency range and the third frequency range.
An antenna control method, characterized by being applied to a foldable mobile terminal, the mobile terminal comprising: a first antenna and a second antenna arranged on both sides of a rotation axis;

The method includes:

Acquiring the opening and closing state of the mobile terminal;

When the mobile terminal is in the expanded state, the first antenna is controlled to work in a first frequency range, where the first frequency range is a frequency range that meets the communication requirements of the mobile terminal, and the second antenna is controlled to work in A second frequency range, where the first frequency range and the second frequency range are at the same frequency, or the first frequency range and the second frequency range are different frequencies;

When the mobile terminal is in the folded state, and it is determined that when the mobile terminal is in the expanded state, the working frequency ranges of the first antenna and the second antenna are at the same frequency, controlling the first antenna to work in the first antenna. Frequency range; according to the first frequency range, through the second antenna adjustment circuit, the second antenna is controlled to switch from the second frequency range to the third frequency range to work, the third frequency range and the The first frequency range is adjacent and does not completely overlap;

When the mobile terminal is in the folded state, and it is determined that when the mobile terminal is in the expanded state, the working frequency ranges of the first antenna and the second antenna are different, controlling the first antenna to work in the first Frequency range; according to the first frequency range, through the second antenna adjustment circuit, the second antenna is controlled to work in the second frequency range and the third frequency range, the third frequency range and the first A frequency range is adjacent and does not completely overlap.
The method of claim 21, wherein:

The third frequency range is adjacent to and does not overlap with the first frequency range, or the third frequency range partially overlaps with the first frequency range.
The method according to claim 21 or 22, wherein the first frequency range includes any one of the following frequency ranges:

600～960MHz low frequency band, 1710～2200MHz middle frequency band and 2300～2700MHz high frequency band.
The method according to any one of claims 21-23, wherein the obtaining the open and close state of the mobile terminal comprises:

Obtain the opening and closing angle of the rotating shaft; or,

Obtain the distance between the two housings of the mobile terminal.