An electronic device

Abstract

The application discloses an electronic device, and relates to the technical field of antenna design, and comprises an acoustic device, a processor, a first antenna branch, a second antenna branch and a matching network. The matching network can adjust the phase of a first electromagnetic wave generated by the first antenna branch and the phase of a second electromagnetic wave generated by the second antenna branch, so that the phase of the first electromagnetic wave and the phase of the second electromagnetic wave are kept at a target phase difference. The problem that the electromagnetic waves at the ends of the first antenna branch and the second antenna branch are offset and affect the bandwidth of the antenna is avoided, so that the bandwidth of the antenna can meet the requirements, and the requirement for the assembly process of the electronic device is relatively reduced on the basis of guaranteeing the wireless performance of the electronic device.

Description

TECHNICAL FIELD

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

[0002] Various types of antennas are usually provided in electronic devices, and the bandwidth of the antennas affects the performance of the electronic devices. In particular, in small electronic devices such as wireless earphones, the distance between various devices such as optical devices and acoustic devices and the antennas is very close, and the optical devices and the acoustic devices will affect the bandwidth of the antennas. Moreover, due to the limited space in the electronic devices, the existing technology cannot use the scheme of increasing a coupling parasitic element to couple the antenna parasitic element and the antenna main body to expand the bandwidth of the antenna. To solve the above problems, the existing technology proposes higher requirements for the assembly process of various devices in the electronic devices during the production of the electronic devices. However, due to the influence of the size of the electronic devices, the bandwidth of the antennas in the existing technology is still difficult to guarantee, and the wireless performance of the electronic devices cannot be guaranteed. Therefore, in order to reduce the assembly difficulty of the electronic devices during the production process and improve the product yield, it is necessary to expand the bandwidth of the antennas. SUMMARY

[0003] The purpose of the present application is to provide an electronic device that can guarantee the wireless performance of the electronic device while relatively reducing the requirements for the assembly process of the electronic device.

[0004] To solve the above technical problems, the present application provides an electronic device, comprising an acoustic device, a processor, a first antenna branch, a second antenna branch, and a matching network.

[0005] The first antenna branch and the second antenna branch are both used to generate electromagnetic waves.

[0006] The matching network is used to adjust the phase of the first electromagnetic wave generated by the first antenna branch and the phase of the second electromagnetic wave generated by the second antenna branch, so that the phase difference between the phase of the first electromagnetic wave and the phase of the second electromagnetic wave is maintained as a target phase difference.

[0007] Preferably, the matching network comprises a first capacitor, a second capacitor, a first inductor, and a second inductor.

[0008] The feed end of the first antenna branch and the ground end of the second antenna branch are respectively connected to the first output end and the second output end of the matching network, the first input end of the matching network is connected to a feed line, and the second input end of the matching network is grounded.

[0009] The first end and the second end of the first capacitor are respectively a first output end and a second output end of the matching network, the first end of the first capacitor is connected with the common end connected with the feeding end, and the first end of the first capacitor is connected with the first end of the second capacitor, the second end of the first inductor is a first input end of the matching network, the common end connected with the second end of the first capacitor is connected with the first end of the second inductor, and the second end of the second inductor is connected with the second end of the second capacitor and the common end connected with the second end of the second capacitor is a second input end of the matching network.

[0010] Preferably, further comprising:

[0011] An impedance adjustment module having one end connected with the feeding end and the other end grounded, used for adjusting the input impedance of the first antenna branch and the input impedance of the second antenna branch.

[0012] Preferably, the impedance adjustment module is a third capacitor.

[0013] Preferably, further comprising a first antenna connector arranged on the main board where the matching network is arranged, used for connecting the first antenna branch and the matching network.

[0014] Preferably, further comprising a second antenna connector arranged on the main board where the matching network is arranged, used for connecting the second antenna branch and the matching network.

[0015] Preferably, the processor is used for controlling the acoustic device to work based on the signals received by the first antenna branch and the second antenna branch.

[0016] Preferably, further comprising an optical device.

[0017] The processor is further used for controlling the optical device to work based on the signals received by the first antenna branch and the second antenna branch.

[0018] Preferably, when the first antenna branch and the second antenna branch are both used for generating electromagnetic waves with a frequency less than a preset low frequency value, the length of the first antenna branch and the length of the second antenna branch are both less than a preset length threshold, and / or the length of the overlapping part of the first antenna branch and the second antenna branch is greater than a preset overlapping length value, and / or the vertical distance between the first antenna branch and the second antenna branch is less than a first preset vertical distance, and / or the vertical distance between the first antenna branch, the second antenna branch and the main board where the matching network is arranged is less than a second preset vertical distance.

[0019] In conclusion, the electronic device provided by the application includes an acoustic device, a processor, a first antenna branch, a second antenna branch and a matching network. The matching network can adjust the phase of the first electromagnetic wave generated by the first antenna branch and the phase of the second electromagnetic wave generated by the second antenna branch, so that the phase of the first electromagnetic wave and the phase of the second electromagnetic wave can be kept at a target phase difference. The problem that the electromagnetic waves at the ends of the first antenna branch and the second antenna branch are offset from each other and affect the bandwidth of the antenna can be avoided. Therefore, the bandwidth of the antenna can meet the requirements, and the requirements for the assembly process of the electronic device can be relatively reduced on the basis of ensuring the wireless performance of the electronic device. BRIEF DESCRIPTION OF DRAWINGS

[0020] In order to more clearly illustrate the technical solutions in the embodiments of the application, the drawings needed in the prior art and the embodiments will be briefly introduced as follows. Obviously, the drawings described below are only some embodiments of the application, and other drawings can be obtained by those skilled in the art without creative labor on the basis of these drawings.

[0021] Figure 1 A structural schematic diagram of an antenna system in an electronic device provided by the application is shown in FIG. 1.

[0022] Figure 2 A setting position schematic diagram of an antenna branch in an antenna system provided by the application is shown in FIG. 2. DETAILED DESCRIPTION

[0023] The core of the application is to provide an electronic device, which can ensure the wireless performance of the electronic device and relatively reduce the requirements for the assembly process of the electronic device.

[0024] In order to make the objects, technical solutions and advantages of the embodiments of the application clearer, the technical solutions in the embodiments of the application will be described clearly and completely below with reference to the drawings in the embodiments of the application. Obviously, the described embodiments are only some embodiments of the application, but not all the embodiments. Based on the embodiments in the application, all other embodiments obtained by those skilled in the art without creative labor are within the protection scope of the application.

[0025] Please refer to Figure 1 , Figure 1 A structural schematic diagram of an antenna system in an electronic device provided by the application is shown in FIG. 1. The antenna system includes an acoustic device, a processor, a first antenna branch 2, a second antenna branch 3 and a matching network 1.

[0026] The first antenna branch 2 and the second antenna branch 3 are both used for generating electromagnetic waves.

[0027] The matching network 1 is configured to adjust the phase of the first electromagnetic wave generated by the first antenna branch 2 and the phase of the second electromagnetic wave generated by the second antenna branch 3, so that the phase difference between the first electromagnetic wave and the second electromagnetic wave is kept as a target phase difference.

[0028] The existing electronic device usually has WIFI, Bluetooth and GPS type antennas, and the bandwidth of these antennas determines the tolerance of the electronic device. In particular, for a wireless earphone or other small electronic device, the assembly difficulty is very great, and the assembly consistency of the acoustic device and the optical device in the electronic device will directly affect the performance of the antenna. Therefore, the existing technology puts forward high requirements for the assembly process of the electronic device, but due to the influence of the volume of the electronic device, the bandwidth of the antenna in the electronic device cannot be guaranteed, so the wireless performance of the electronic device cannot be guaranteed.

[0029] To solve the above problems, the matching network 1 is used to expand the bandwidth of the antenna in the limited space of the electronic device. In order to reduce the space occupied by the antenna, the directions of the first antenna branch 2 and the second antenna branch 3 for radiating electromagnetic waves are usually set to be the same in the electronic device, so as to couple to produce double resonance, but this setting method causes the electromagnetic waves generated at the ends of the first antenna branch 2 and the second antenna branch 3 to be mutually offset, which reduces the radiation efficiency of the antenna system and affects the bandwidth of the antenna system.

[0030] Therefore, in the present application, the matching network 1 is used to adjust the phase of the first electromagnetic wave generated by the first antenna branch 2 and the phase of the second electromagnetic wave generated by the second antenna branch 3, and finally control the phase difference between the first electromagnetic wave and the second electromagnetic wave to keep the target phase difference, so that the electromagnetic waves on the first antenna branch 2 and the second antenna branch 3 will not offset each other, even if the first antenna branch 2 and the second antenna branch 3 are set in the same direction to ensure the miniaturization of the electronic device, the radiation efficiency of the antenna system can still be guaranteed, the bandwidth of the antenna system is improved, and the wireless performance of the electronic device is guaranteed.

[0031] It should be further pointed out that the present application does not particularly limit the specific value of the phase difference between the first electromagnetic wave and the second electromagnetic wave finally controlled by the matching network 1, which can be adjusted according to actual use requirements.

[0032] In some embodiments, the processor is configured to control the acoustic device to work based on the signals received by the first antenna branch 2 and the second antenna branch 3.

[0033] The electronic device including the acoustic device in the application can be wireless earphones and the like. In addition, an optical device can also be added in the electronic device, and the processor controls the acoustic device and the optical device to work based on the signals received by the first antenna branch 2 and the second antenna branch 3, such as smart glasses and the like.

[0034] For example, the signal received by the antenna can be a control signal, and the processor can control the acoustic device and / or the optical device to work according to the control signal. Alternatively, the signal received by the antenna can be data information, and the processor can control the acoustic device and / or the optical device to play / display the data information.

[0035] Of course, in some embodiments, the above-mentioned control signal or data information can also come from other terminals connected to the electronic device locally or in a wired manner.

[0036] In summary, the application provides an electronic device including an acoustic device, a processor, a first antenna branch 2, a second antenna branch 3 and a matching network 1. The matching network 1 can adjust the phase of the first electromagnetic wave generated by the first antenna branch 2 and the phase of the second electromagnetic wave generated by the second antenna branch 3, so as to finally keep the phase of the first electromagnetic wave and the phase of the second electromagnetic wave at a target phase difference, avoid the electromagnetic waves at the ends of the first antenna branch 2 and the second antenna branch 3 from canceling each other and thus affecting the bandwidth of the antenna, so as to ensure that the bandwidth of the antenna can meet the requirements, and ensure that the wireless performance of the electronic device can be relatively reduced on the basis of the requirements of the assembly process of the electronic device. The processor controls the acoustic device to work based on the signals received by the first antenna branch and the second antenna branch, so as to realize the basic function of playing sound of the electronic device.

[0037] On the basis of the above-mentioned embodiments:

[0038] As a preferred embodiment, the matching network 1 includes a first capacitor C1, a second capacitor C2, a first inductor L1 and a second inductor L2.

[0039] The feeding end of the first antenna branch 2 and the grounding end of the second antenna branch 3 are respectively connected with the first output end and the second output end of the matching network 1, the first input end of the matching network 1 is connected with the feeder, and the second input end of the matching network 1 is grounded.

[0040] The first end and the second end of the first capacitor C1 are respectively the first output end and the second output end of the matching network 1, the first end of the first capacitor C1 is connected with the common end connected with the feeding end, the first end of the first inductor L1 and the first end of the second capacitor C2 are respectively connected with the common end, the second end of the first inductor L1 is the first input end of the matching network 1, the common end connected with the second end of the first capacitor C1 is connected with the first end of the second inductor L2, and the second end of the second inductor L2 is connected with the second end of the second capacitor C2 and the common end connected with the second end is the second input end of the matching network 1.

[0041] In the embodiment, a specific implementation structure of the matching network 1 is provided, the matching network 1 includes the first capacitor C1, the second capacitor C2, the first inductor L1 and the second inductor L2, by adjusting the capacitance value of the first capacitor C1, the capacitance value of the second capacitor C2, the inductance value of the first inductor L1 and the inductance value of the second inductor L2, the path of the radio frequency current provided by the feeding line to the first antenna branch 2 and the second antenna branch 3 can be changed, when the path of the radio frequency current on the first antenna branch 2 is different from the path of the radio frequency current on the second antenna branch 3, the phase of the first electromagnetic wave generated on the first antenna branch 2 is also different from the phase of the second electromagnetic wave generated on the second antenna branch 3, and then the purpose of controlling the phase difference between the phase of the first electromagnetic wave and the phase of the second electromagnetic wave to the target phase difference by using the matching network 1 is achieved, so that the problem that the electromagnetic waves at the ends of the first antenna branch 2 and the second antenna branch 3 are offset to each other and then affect the bandwidth of the antenna is avoided, so that the bandwidth of the antenna can meet the requirements, the requirements on the assembly process of the electronic equipment can be relatively reduced on the basis of ensuring the wireless performance of the electronic equipment, and the structure of the circuit is simple and the cost is relatively low.

[0042] In actual application process, when the capacitance value of the first capacitor C1 is increased or the capacitance value of the second capacitor C2 is increased, the gain decibel value of the low frequency resonance of the antenna system will be higher and the range will be wider, and the gain decibel value of the high frequency resonance will be decreased and the range will be wider; when the inductance value of the first inductor L1 is increased, the gain decibel value of the low frequency resonance of the antenna system will be decreased and the range will be narrower, and the gain decibel value of the high frequency resonance will be increased; when the inductance value of the second inductor L2 is increased, the gain decibel value of the low frequency resonance of the antenna system will be increased, and the gain decibel value of the high frequency resonance will be decreased and the range will be narrower. Therefore, the parameters of each device in the matching network can be selected according to the above rules.

[0043] As a preferred embodiment, it further includes:

[0044] An impedance adjusting module having one end connected with the feeding end and the other end grounded, for adjusting the input impedance of the first antenna branch 2 and the input impedance of the second antenna branch 3.

[0045] In practical applications, the wireless performance of the electronic device is related to not only the phase of the electromagnetic wave of the antenna, but also the input impedance of the antenna, which is the ratio of the voltage at the input end of the antenna to the current at the input end. Therefore, in the embodiment, an impedance adjustment module, for example, a third capacitor C3, is additionally provided in the antenna system.

[0046] As a preferred embodiment, a first antenna connector 4 is provided on the main board where the matching network is located, for connecting the first antenna branch 2 and the matching network 1.

[0047] As a preferred embodiment, a second antenna connector 5 is also provided on the main board where the matching network is located, for connecting the second antenna branch 3 and the matching network 1.

[0048] Please refer to Figure 2 , Figure 2 A schematic diagram of the setting position of the antenna branch in the antenna system provided by the present application. In practical applications, in order to reduce the size of the electronic device, the antenna is sometimes arranged on the shell of the electronic device, and the components such as the feeding line and the matching network 1 arranged on the main board are arranged inside the electronic device. Therefore, in the embodiment, in order to realize the normal function of the antenna system in radiating electromagnetic waves, a first antenna connector 4 and a second antenna connector 5 are additionally provided in the antenna system, and both the first antenna connector 4 and the second antenna connector 5 are arranged on the main board. When the shell of the electronic device is buckled with another part of the electronic device, the first antenna branch 2 and the second antenna branch 3 are connected with the matching network 1 through the first antenna connector 4 and the second antenna connector 5 respectively, which can reduce the size of the electronic device.

[0049] The first antenna connector 4 and the second antenna connector 5 can be metal springs, and the specific structure of both is not particularly limited in the present application.

[0050] As a preferred embodiment, when the first antenna branch 2 and the second antenna branch 3 are both used to generate electromagnetic waves with a frequency less than a preset low frequency value, the length of the first antenna branch 2 and the length of the second antenna branch 3 are both less than a preset length threshold, and / or the length of the overlapping part of the first antenna branch 2 and the second antenna branch 3 is greater than a preset overlapping length value, and / or the vertical distance between the first antenna branch 2 and the second antenna branch 3 is less than a first preset vertical distance, and / or the vertical distance between the first antenna branch 2, the second antenna branch 3 and the main board where the matching network 1 is located is less than a second preset vertical distance.

[0051] In the embodiment, when the electronic device generates electromagnetic waves of low frequency by using the first antenna branch 2 and the second antenna branch 3, the length of the first antenna branch 2 and the second antenna branch 3, the length of the overlapping part of the first antenna branch 2 and the second antenna branch 3, the first vertical distance between the first antenna branch 2 and the second antenna branch 3, and the second vertical distance between the first antenna branch 2 and the second antenna branch 3 from the mainboard can also be adjusted. The longer the length of the first antenna branch 2 and the second antenna branch 3, the lower the frequency of the electromagnetic waves generated by the first antenna branch 2 and the second antenna branch 3; the longer the length of the overlapping part between the first antenna branch 2 and the second antenna branch 3, the lower the frequency of the electromagnetic waves generated by the first antenna branch 2 and the second antenna branch 3 when the first antenna branch 2 and the second antenna branch 3 are arranged in the same direction; the smaller the vertical distance between the first antenna branch 2 and the second antenna branch 3, the lower the frequency of the electromagnetic waves generated by the first antenna branch 2 and the second antenna branch 3; and the closer the second vertical distance between the first antenna branch 2 and the second antenna branch 3 from the mainboard, the lower the frequency of the electromagnetic waves generated by the first antenna branch 2 and the second antenna branch 3. It is easy to understand that if the electronic device generates electromagnetic waves of high frequency by using the antenna system, the setting mode is opposite to that in the embodiment. Therefore, the matching network 1 arranged in the application can not only increase the bandwidth of the antenna system, but also relatively reduce the requirement on the assembly process of the electronic device on the basis of ensuring the wireless performance of the electronic device, and can also adjust the frequency of the electromagnetic waves of the antenna system.

[0052] Each embodiment in the specification is described in a progressive manner, and each embodiment focuses on the difference from other embodiments. The same or similar parts between embodiments can be referred to each other.

[0053] It should also be noted that the terms such as first and second in the specification are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between the entities or operations. Moreover, the terms "include", "contain" or any other variants thereof are intended to cover non-exclusive inclusion, so that the process, method, article or device including a series of elements not only includes those elements, but also includes other elements not explicitly listed or inherent to such process, method, article or device. Without more limitations, the element defined by the statement "including a" does not exclude the presence of another same element in the process, method, article or device including the element.

[0054] The foregoing description of the disclosed embodiments enables a person skilled in the art to make or use the application. Modifications of these embodiments will occur to persons of skill in the art, and that the appended claims are intended to cover all such modifications that do not depart from the true spirit and scope of the application. Therefore, the application is not limited to the embodiments shown but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. An electronic device, comprising: The acoustic device, the processor, the first antenna branch, the second antenna branch and the matching network are included. The first antenna branch and the second antenna branch are both used for generating electromagnetic waves. The matching network is used for adjusting the phase of the first electromagnetic wave generated by the first antenna branch and the phase of the second electromagnetic wave generated by the second antenna branch, so that the phase difference between the phase of the first electromagnetic wave and the phase of the second electromagnetic wave is kept as a target phase difference. The matching network includes a first capacitor, a second capacitor, a first inductor and a second inductor. The feeding end of the first antenna branch and the grounding end of the second antenna branch are respectively connected with the first output end and the second output end of the matching network, the first input end of the matching network is connected with the feeder, and the second input end of the matching network is grounded. The first end and the second end of the first capacitor are respectively used as the first output end and the second output end of the matching network, the common end where the first end of the first capacitor is connected with the feeding end is connected with the first end of the first inductor and the first end of the second capacitor, the second end of the first inductor is used as the first input end of the matching network, the common end where the grounding end is connected with the second end of the first capacitor is connected with the first end of the second inductor, and the second end of the second inductor is connected with the second end of the second capacitor and the common end where they are connected is used as the second input end of the matching network.

2. The electronic device of claim 1, wherein, Further comprising: An impedance adjusting module having one end connected with the feeding end and the other end grounded, used for adjusting the input impedance of the first antenna branch and the input impedance of the second antenna branch.

3. The electronic device of claim 2, wherein, The impedance adjusting module is a third capacitor.

4. The electronic device of claim 1, wherein, Further comprising a first antenna connector arranged on a mainboard where the matching network is arranged, used for connecting the first antenna branch with the matching network.

5. The electronic device of claim 1, wherein, Further comprising a second antenna connector arranged on the mainboard where the matching network is arranged, used for connecting the second antenna branch with the matching network.

6. The electronic device of claim 1, wherein, The processor is used for controlling the acoustic device to work based on the signals received by the first antenna branch and the second antenna branch.

7. The electronic device of claim 1, wherein, Further comprising an optical device; The processor is further used for controlling the optical device to work based on the signals received by the first antenna branch and the second antenna branch.

8. The electronic device of any one of claims 1 to 7, wherein, When the first antenna branch and the second antenna branch are both used for generating electromagnetic waves with a frequency less than a preset low frequency value, the length of the first antenna branch and the length of the second antenna branch are both less than a preset length threshold, and / or the length of the overlapping part of the first antenna branch and the second antenna branch is greater than a preset overlapping length value, and / or the vertical distance between the first antenna branch and the second antenna branch is less than a first preset vertical distance, and / or the vertical distance between the first antenna branch, the second antenna branch and the mainboard where the matching network is arranged is less than a second preset vertical distance.

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