Antenna device and electronic device

Abstract

Embodiments of the present application provide an antenna device and an electronic device. The antenna device comprises: a first feed source; a first radiator connected with the first feed source; a second radiator connected with the first feed source through a phase shifter; the phase shifter can change the phase of an excitation signal fed to the second radiator, so as to adjust the directional diagram of the antenna device, and the directional diagram is formed by the first radiator and the second radiator together. In the antenna device, the phase shifter can change the phase of the excitation signal fed to the second radiator, so as to adjust the directional diagram of the antenna device, thereby improving the communication signal strength in the communication direction and improving the communication stability.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of communication, in particular to an antenna device and an electronic device. BACKGROUND

[0002] Electronic devices such as smart phones usually have multiple antennas, such as cellular antennas, Wi-Fi (Wireless Fidelity) antennas, GPS (Global Positioning System) antennas, Bluetooth antennas, etc., to realize corresponding communication functions.

[0003] Currently, when the electronic device communicates, the antenna pattern in the electronic device is fixed. Thus, when the electronic device communicates with other devices in the direction with weak signals, the communication quality is reduced. SUMMARY

[0004] The embodiments of the present application provide an antenna device and an electronic device, which can adjust the antenna pattern of the antenna device, thereby improving the communication stability.

[0005] The embodiments of the present application provide an antenna device, comprising:

[0006] a first feed source;

[0007] a first radiator connected with the first feed source; and

[0008] a second radiator connected with the first feed source through a phase shifter;

[0009] The phase shifter can change the phase of the excitation signal fed into the second radiator, so as to adjust the antenna pattern of the antenna device, and the antenna pattern is formed by the first radiator and the second radiator.

[0010] The embodiments of the present application also provide an electronic device, comprising:

[0011] a housing;

[0012] an antenna device mounted on the housing, wherein the antenna device is the above-mentioned antenna device.

[0013] The antenna device provided by the embodiments of the present application can change the phase of the excitation signal fed into the second radiator through the phase shifter, so as to change the phase of the excitation signal through the phase shifter when the communication signal is weak, adjust the antenna pattern of the antenna device, and thus improve the communication signal strength in the communication direction, thereby improving the communication stability. BRIEF DESCRIPTION OF DRAWINGS

[0014] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0015] Figure 1 This is a schematic diagram of the structure of an electronic device provided in an embodiment of this application.

[0016] Figure 2 This is a schematic diagram of a first structure of the antenna device provided in an embodiment of this application.

[0017] Figure 3 This is a schematic diagram of the antenna pattern before adjustment, provided in the embodiments of this application.

[0018] Figure 4 This is a schematic diagram of the antenna pattern after adjustment, provided in an embodiment of this application.

[0019] Figure 5 This is a schematic diagram of a second structure of the antenna device provided in an embodiment of this application.

[0020] Figure 6 This is a schematic diagram of a third structure of the antenna device provided in the embodiments of this application.

[0021] Figure 7 This is a schematic diagram of a fourth structure of the antenna device provided in the embodiments of this application.

[0022] Figure 8 for Figure 7 A schematic diagram of the structure of the second switch of the antenna device shown. Detailed Implementation

[0023] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0024] This application provides an electronic device. The electronic device can be a smartphone, tablet computer, or other similar device, as well as a gaming device, AR (Augmented Reality) device, automobile, data storage device, audio playback device, video playback device, laptop computer, desktop computing device, etc.

[0025] refer to Figure 1 , Figure 1This is a schematic diagram of the structure of the electronic device 100 provided in the embodiments of this application.

[0026] The electronic device 100 includes a housing 10 and an antenna device 20. The antenna device 20 is installed inside the housing 10. The antenna device 20 is capable of transmitting and receiving wireless signals, such as cellular signals, Wi-Fi (Wireless Fidelity) signals, Bluetooth signals, and GPS (Global Positioning System) signals, to achieve corresponding communication functions.

[0027] In some embodiments, the housing 10 includes a metal frame 11 and a battery cover 12. The metal frame 11 forms the overall frame of the electronic device 100 and is used to house functional components of the electronic device, such as cameras, circuit boards, and sensors. The metal frame 11 can be made of materials such as aluminum alloy or magnesium alloy. The battery cover 12 is connected to the metal frame 11 and forms the rear cover of the electronic device 100.

[0028] refer to Figure 2 , Figure 2 This is a schematic diagram of a first structure of the antenna device 20 provided in an embodiment of this application.

[0029] The antenna device 20 includes a first feed 21, a first radiator 22, a second radiator 23, a phase shifter 24, and a first power divider 25.

[0030] The first feed source 21 is configured to generate an excitation signal, such as a cellular excitation signal, a Wi-Fi excitation signal, or a Bluetooth excitation signal. It is understood that the Wi-Fi excitation signal may include an excitation signal with a frequency of 2.4 GHz and an excitation signal with a frequency of 5 GHz.

[0031] The first radiator 22 is connected to the first feed source 21, so that the first feed source 21 can feed an excitation signal to the first radiator 22. Understandably, the first radiator 22 is also grounded.

[0032] The second radiator 23 is disposed adjacent to the first radiator 22. The second radiator 23 is connected to the first feed source 21 through a phase shifter 24, so that the first feed source 21 can also feed an excitation signal to the second radiator 23. Understandably, the second radiator 23 can also be grounded.

[0033] The first radiator 22 and the second radiator 23 can both be radiators independently set in the electronic device 100, such as radiators set by means of FPC (Flexible Printed Circuit) or LDS (Laser Direct Structuring), or radiators formed by metal devices in the electronic device 100.

[0034] In some embodiments, the first radiator 22 is formed on the metal frame 11 of the electronic device 100. For example, metal branches can be formed on the metal frame 11, and the first radiator 22 can be formed through the metal branches. The second radiator 23 is a radiator provided by means of FPC or LDS.

[0035] Understandably, since the first feed 21 is connected to both the first radiator 22 and the second radiator 23, a first power divider 25 can be installed between the first feed 21 and both the first radiator 22 and the second radiator 23. The first feed 21 is connected to both the first radiator 22 and the second radiator 23 via the first power divider 25. For example, the first feed 21 can be connected to both the first radiator 22 and the phase shifter 24 via the first power divider 25.

[0036] When the antenna device 20 is in operation, the first radiator 22 and the second radiator 23 together form the radiation pattern of the antenna device 20. Understandably, the signal strength is different in different directions within the radiation pattern of the antenna device 20. For example, if there is a null point in the radiation pattern, when the antenna device 20 communicates towards the null point, the weak signal strength can lead to unstable communication and potential signal interruptions.

[0037] In this embodiment, the phase shifter 24 can change the phase of the excitation signal fed to the second radiator 23, for example, by changing the phase of the excitation signal fed to the second radiator 23 from the first feed source 21, thereby adjusting the radiation pattern of the antenna device 20 formed by the first radiator 22 and the second radiator 23.

[0038] In practical applications, when the communication of electronic device 100 is unstable, or when electronic device 100 detects a weak communication signal, it indicates that the communication direction of electronic device 100 is in the direction of a weak signal in the radiation pattern of antenna device 20. At this time, electronic device 100 can control phase shifter 24 to change the phase of the excitation signal fed to second radiator 23, so as to adjust the radiation pattern of antenna device 20, enhance the signal strength in the communication direction of electronic device 100, and thus improve the communication stability of electronic device 100.

[0039] For example, refer to Figure 3 and Figure 4 ,Figure 3 This is a schematic diagram of the radiation pattern of the antenna device 20 provided in this embodiment before the radiation pattern is adjusted. Figure 4 This is a schematic diagram of the radiation pattern of the antenna device 20 provided in the embodiments of this application after the radiation pattern has been adjusted.

[0040] In this process, Wi-Fi communication occurs between the electronic device and the router. Before the antenna device 20 adjusts the radiation pattern, the router is positioned in the direction of weaker signal in the electronic device's radiation pattern, such as... Figure 3 As shown, communication between the electronic device and the router is unstable at this time. After changing the phase of the excitation signal through a phase shifter, the radiation pattern of the electronic device is adjusted as follows. Figure 4 As shown, the signal strength in the communication direction of the router is enhanced at this time, thus improving the communication stability between electronic devices and the router.

[0041] In some embodiments, reference Figure 5 , Figure 5 This is a schematic diagram of a second structure of the antenna device 20 provided in an embodiment of this application.

[0042] The antenna device 20 also includes a first switch 26. The phase shifter 24 is connected to the first feed 21 via the first switch 26, for example, via the first switch 26 and the first power divider 25 in sequence. The first switch 26 can connect or disconnect the first feed 21 and the phase shifter 24. For example, the first switch 26 can be a single-pole single-throw switch.

[0043] In practical applications, when the second radiator 23 is needed, for example when the communication of electronic device 100 is unstable, the first switch 26 can be controlled to connect the first feed 21 and the phase shifter 24, causing the phase shifter 24 to adjust the phase of the excitation signal fed to the second radiator 23, thereby adjusting the radiation pattern of the antenna device 20. When the second radiator 23 is not needed, for example when the communication of electronic device 100 is always stable, the first switch 26 can be controlled to disconnect the first feed 21 and the phase shifter 24.

[0044] The antenna device 20 provided in this application embodiment has a phase shifter 24 disposed between the first feed 21 and the second radiator 23. The phase shifter 24 can change the phase of the excitation signal fed into the second radiator 23. Therefore, when the communication signal is weak, the phase of the excitation signal can be changed by the phase shifter 24 to adjust the radiation pattern of the antenna device 20, thereby improving the communication signal strength in the communication direction and improving communication stability.

[0045] In some embodiments, reference Figure 6 , Figure 6 This is a schematic diagram of a third structure of the antenna device 20 provided in an embodiment of this application.

[0046] The antenna device 20 also includes a second feed 27, a third radiator 28, and a second power divider 29.

[0047] The second feed source 27 is also configured to generate an excitation signal, such as a cellular excitation signal, a Wi-Fi excitation signal, or a Bluetooth excitation signal. It should be noted that the excitation signal generated by the second feed source 27 is in the same frequency band as the excitation signal generated by the first feed source 21; for example, both can be cellular excitation signals, both can be Wi-Fi excitation signals, both can be Bluetooth excitation signals, and so on.

[0048] The third radiator 28 is disposed adjacent to both the first radiator 22 and the second radiator 23. The third radiator 28 is connected to the second feed source 27, thereby enabling the second feed source 27 to feed an excitation signal to the third radiator 28. It is understood that the third radiator 28 may also be grounded. In some embodiments, the second radiator 23 is disposed between the first radiator 22 and the third radiator 28.

[0049] The third radiator 28 can also be a radiator independently set in the electronic device 100, such as a radiator set by means of FPC (Flexible Printed Circuit) or LDS (Laser Direct Structuring), or a radiator formed by metal devices in the electronic device 100.

[0050] In some embodiments, the third radiator 28 is also formed on the metal frame 11 of the electronic device 100. For example, metal branches may be formed on the metal frame 11, and the third radiator 28 may be formed through the metal branches.

[0051] It should be noted that when the antenna device 20 includes the third radiator 28, the radiation pattern of the antenna device 20 is formed by the first radiator 22, the second radiator 23 and the third radiator 28.

[0052] Understandably, when the antenna device 20 includes a first radiator 22 and a third radiator 28, the first feed source 21 and the second feed source 27 can feed the first radiator 22 and the third radiator 28 with excitation signals of the same frequency band, respectively. Therefore, the first radiator 22 and the third radiator 28 can radiate wireless signals of the same frequency band to the outside world, thereby forming a MIMO (multiple input multiple output) antenna to improve the transmission efficiency of wireless signals.

[0053] In some embodiments, such as Figure 6As shown, the second radiator 23 is also connected to the second feed 27 via a phase shifter 24. Thus, the second feed 27 can feed an excitation signal to the second radiator 23. When the second feed 27 feeds an excitation signal to the second radiator 23, the phase shifter 24 can change the phase of the excitation signal fed from the second feed 27 to the second radiator 23, thereby also adjusting the radiation pattern of the antenna device 20.

[0054] Understandably, in some embodiments, the first feed 21 and the second feed 27 can simultaneously power on the second radiator 23. In this case, the first feed 21 and the second feed 27 can simultaneously feed excitation signals to the second radiator 23. The phase shifter 24 can change the phase of the excitation signal fed to the second radiator 23 by the first feed 21 and the second feed 27 to adjust the radiation pattern of the antenna device 20.

[0055] It is also understandable that, since the second feed 27 is connected to both the third radiator 28 and the second radiator 23, a second power divider 29 can be installed between the second feed 27 and both the third radiator 28 and the second radiator 23. The second feed 27 is connected to both the third radiator 28 and the second radiator 23 via the second power divider 29. For example, the second feed 27 can be connected to both the third radiator 28 and the phase shifter 24 via the second power divider 29.

[0056] In some embodiments, reference Figure 7 , Figure 7 This is a schematic diagram of the fourth structure of the antenna device 20 provided in the embodiments of this application.

[0057] The antenna device 20 also includes a second switch 31. The phase shifter 24 is connected to the first feed 21 and the second feed 27 via the second switch 31, for example, it is connected to the first feed 21 via the second switch 31 and the first power divider 25 in sequence, and to the second feed 27 via the second switch 31 and the second power divider 29 in sequence.

[0058] Specifically, the second switch 31 can connect or disconnect the first feed 21 and the phase shifter 24. The second switch 31 can also connect or disconnect the second feed 27 and the phase shifter 24. That is, the second switch 31 can connect the first feed 21 and the phase shifter 24 while disconnecting the second feed 27 and the phase shifter 24; it can connect the second feed 27 and the phase shifter 24 while disconnecting the first feed 21 and the phase shifter 24; it can also connect the first feed 21 and the phase shifter 24 while connecting the second feed 27 and the phase shifter 24; and it can also disconnect the first feed 21 and the phase shifter 24 while disconnecting the second feed 27 and the phase shifter 24.

[0059] Understandably, when the second switch 31 connects the first feed 21 and the phase shifter 24 and disconnects the second feed 27 and the phase shifter 24, the first feed 21 can feed an excitation signal to the second radiator 23. At this time, the phase shifter 24 can change the excitation signal fed from the first feed 21 to the second radiator 23 to adjust the radiation pattern of the antenna device 20. When the second switch 31 connects the second feed 27 and the phase shifter 24 and disconnects the first feed 21 and the phase shifter 24, the second feed 27 can feed an excitation signal to the second radiator 23. At this time, the phase shifter 24 can change the excitation signal fed from the second feed 27 to the second radiator 23 to adjust the radiation pattern of the antenna device 20. When the second switch 31 connects the first feed 21 and the phase shifter 24 and simultaneously connects the second feed 27 and the phase shifter 24, the first feed 21 and the second feed 27 can simultaneously feed excitation signals to the second radiator 23. At this time, the phase shifter 24 can change the excitation signal fed into the second radiator 23 by the first feed 21 and the second feed 27 together, so as to adjust the radiation pattern of the antenna device 20.

[0060] In some embodiments, reference Figure 8 , Figure 8 for Figure 7 A schematic diagram of the structure of the second switch 31 of the antenna device shown.

[0061] The second switch 31 includes four ports, such as a first port 311, a second port 312, a third port 313, and a fourth port 314. The first port 311 is connected to the first feed 21, for example, via a first power divider 25; the second port 312 is connected to the second feed 27, for example, via a second power divider 29; the third port 313 is grounded; and the fourth port 314 is connected to the phase shifter 24. The first port 311 can connect to either the fourth port 314 or the third port 313. The second port 312 can connect to either the fourth port 314 or the third port 313.

[0062] Understandably, when the first port 311 is connected to the fourth port 314, it connects the first feed 21 and the phase shifter 24; when the first port 311 is connected to the third port 313, it disconnects the first feed 21 and the phase shifter 24, at which point the first port 311 is grounded. When the second port 312 is connected to the fourth port 314, it connects the second feed 27 and the phase shifter 24; when the second port 312 is connected to the third port 313, it disconnects the second feed 27 and the phase shifter 24, at which point the second port 312 is grounded.

[0063] In some embodiments, the second switch 31 may include two single-pole double-throw switches, and the two single-pole double-throw switches share two throw terminals.

[0064] The antenna device 20 provided in this application embodiment has a phase shifter 24 disposed between the first feed 21, the second feed 27 and the second radiator 23. The phase shifter 24 can change the phase of the excitation signal fed into the second radiator 23. Therefore, when the communication signal is weak, the phase of the excitation signal can be changed by the phase shifter 24 to adjust the radiation pattern of the antenna device 20, thereby improving the communication signal strength in the communication direction and improving communication stability.

[0065] In the description of this application, it should be understood that terms such as “first” and “second” are used only to distinguish similar objects and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated.

[0066] The antenna device and electronic device provided in the embodiments of this application have been described in detail above. Specific examples have been used to illustrate the principles and implementation methods of this application, and the descriptions of the embodiments above are only for the purpose of helping to understand this application. Furthermore, those skilled in the art will recognize that, based on the ideas of this application, there will be changes in the specific implementation methods and application scope. Therefore, the content of this specification should not be construed as a limitation of this application.

Claims

1. An antenna device, characterized in that, The antenna device, used in electronic devices, includes: First feed source; The first radiator includes a first end, a second end, a first grounding point, and a first feed point. The first grounding point is used for grounding and is disposed between the first end and the second end. The first feed point is disposed between the first grounding point and the second end. The first feed point is connected to the first feed source. The first radiator is formed on the metal frame of the electronic device. Second feed source; A third radiator, the third radiator being connected to the second feed source; and The second radiator is connected to the first feed and the second feed respectively via a phase shifter. The second radiator includes an FPC or LDS radiator. When the electronic device detects a weak communication signal, it controls the phase shifter to change the phase of the excitation signal fed to the second radiator, thereby adjusting the radiation pattern of the antenna device and enhancing the signal strength in the communication direction of the electronic device. The radiation pattern of the antenna device is formed by the first radiator, the second radiator, and the third radiator.

2. The antenna device according to claim 1, characterized in that, It also includes a first switch, through which the phase shifter is connected to the first feed source. The first switch can connect the first feed source to the phase shifter or disconnect the first feed source from the phase shifter.

3. The antenna device according to claim 1 or 2, characterized in that, Also includes: The first power divider connects the first feed source to the first radiator and the phase shifter.

4. The antenna device according to claim 1, characterized in that, It also includes a second switch, through which the phase shifter is connected to the first feed source and the second feed source. The second switch can connect the first feed source to the phase shifter or disconnect the first feed source from the phase shifter. The second switch can also connect the second feed source to the phase shifter or disconnect the second feed source from the phase shifter.

5. The antenna device according to claim 4, characterized in that, The second switch includes a first port, a second port, a third port, and a fourth port. The first port is connected to the first feed source, the second port is connected to the second feed source, the third port is grounded, and the fourth port is connected to the phase shifter. The first port can connect to either the fourth port or the third port, and the second port can connect to either the fourth port or the third port.

6. The antenna device according to claim 1, 4, or 5, characterized in that, Also includes: The first power divider, the first feed source is connected to the first radiator and the phase shifter through the first power divider; The second power divider connects the second feed source to the third radiator and the phase shifter.

7. The antenna device according to claim 1, 4, or 5, characterized in that, The second radiator is disposed between the first radiator and the third radiator.

8. An electronic device, characterized in that, include: case; An antenna device is mounted on the housing, wherein the antenna device is the antenna device according to any one of claims 1 to 7.

9. The electronic device according to claim 8, characterized in that, The housing includes: A metal frame, on which both the first radiator and the second radiator are formed; The battery cover is connected to the metal frame.

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