Electronic device

Abstract

The application provides an electronic device, which comprises a middle frame, a first excitation source, a second excitation source, a first filter circuit and a second filter circuit. The middle frame comprises a middle frame body and a frame connected to the periphery of the middle frame body. The middle frame body comprises a first gap. A second gap, which is connected to the first gap, is arranged on the frame adjacent to the first gap, so as to divide the frame into a first branch. The first excitation source feeds a first excitation signal to the first branch, so as to excite the first branch to resonate as a first antenna of a radiator in a first frequency band. The second excitation source feeds a second excitation signal to the first branch, so as to excite the first branch to resonate as a second antenna of a radiator in a second frequency band. The first filter circuit is electrically connected between the first excitation source and the first branch, and filters electromagnetic wave signals of the second frequency band to interfere with the first antenna. The second filter circuit is electrically connected between the second excitation source and the first branch, and filters electromagnetic wave signals of the first frequency band to interfere with the second antenna. The device has good communication effect.

Description

TECHNICAL FIELD

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

[0002] With the development of mobile communication technology, smart phones with communication function are more and more favored by users. With the increasing functions of smart phones, the devices in the smart phones are more and more stacked, and the space left for the antennas in the smart phones is smaller and smaller. The small space of the antennas in the smart phones leads to the limitation of the clearance of the antennas and the bandwidth of the antennas. Therefore, the communication performance of the antennas in the traditional smart phones needs to be improved. SUMMARY

[0003] The present application provides an electronic device, comprising:

[0004] A middle frame, the middle frame comprises a middle frame body and a frame connected to the periphery of the middle frame body, the middle frame body comprises a first gap penetrating through the opposite two surfaces of the middle frame body, and a second gap is also provided on the frame adjacent to the first gap, the second gap is communicated with the first gap, and the first gap and the second gap divide the frame into a first branch;

[0005] A first excitation source is electrically connected to one end of the first branch, used for feeding a first excitation signal into the first branch to excite the first branch as a radiator to resonate at a first frequency band as a first antenna;

[0006] A second excitation source is electrically connected to the other end of the first branch, used for feeding a second excitation signal into the first branch to excite the first branch as a radiator to resonate at a second frequency band as a second antenna;

[0007] A first filter circuit is electrically connected between the first excitation source and the first branch, used for filtering out the electromagnetic wave signals of the second frequency band to interfere with the first antenna; and

[0008] A second filter circuit is electrically connected between the second excitation source and the first branch, used for filtering out the electromagnetic wave signals of the first frequency band to interfere with the second antenna.

[0009] The application further provides an electronic device, which comprises a shell and a circuit board, the shell comprises a body and a frame connected to the periphery of the body, the body comprises a first surface and a second surface arranged oppositely, the periphery of the body is provided with a first gap penetrating through the first surface and the second surface, the first gap separates at least a part of the frame from the body, the frame is provided with a second gap communicating with the first gap, and the first gap and the second gap divide the frame into a first branch, the first branch is provided with a first feeding point and a second feeding point arranged at intervals, the circuit board comprises a first excitation source, a second excitation source, a first filter circuit and a second filter circuit, the first excitation source is electrically connected to the first feeding point, the second excitation source is electrically connected to the second feeding point, the first filter circuit is used for filtering the interference of a second antenna where the second excitation source is located on a first antenna where the first excitation source is located, and the second filter circuit is used for filtering the interference of a first antenna where the first excitation source is located on a second antenna where the second excitation source is located.

[0010] Compared with the prior art, the electronic device provided by the application uses the frame or the shell as the first branch, uses the first branch to form the radiators of the first antenna and the second antenna, and avoids the interference between the first antenna and the second antenna through the first filter circuit and the second filter circuit, so as to realize the isolation between the first antenna and the second antenna. Therefore, the electronic device provided by the application can realize more frequency band coverage in a limited space, realize a larger bandwidth, and has higher communication performance. BRIEF DESCRIPTION OF DRAWINGS

[0011] In order to more clearly illustrate the technical solutions of the embodiments of the application, the drawings needed in the embodiments will be briefly introduced as follows. Obviously, the drawings in the following description are some embodiments of the application, and other drawings can also be obtained by those skilled in the art without any creative effort on the basis of these drawings.

[0012] Figure 1 A perspective view of an electronic device provided by an embodiment of the application.

[0013] Figure 2 A perspective view of an electronic device provided by an embodiment of the application.

[0014] Figure 3 A perspective view of a frame provided by an embodiment of the application. Figure 2 A perspective view of a frame provided by an embodiment of the application.

[0015] Figure 4 A top view of a frame in an electronic device provided by an embodiment of the application.

[0016] Figure 5This is a schematic diagram of a first antenna and a second antenna in an electronic device provided according to an embodiment of this application.

[0017] Figure 6 A top view of the mid-frame of an electronic device provided in another embodiment of this application.

[0018] Figure 7 A schematic diagram of a first antenna and a second antenna in an electronic device provided in another embodiment of this application.

[0019] Figure 8 Provided for one embodiment Figure 7 A schematic diagram of the switching circuit in the image.

[0020] Figure 9 A simulation diagram of the voltage across the switching circuit is provided for one embodiment of this application, showing the voltage across the second antenna when the second antenna includes a voltage divider circuit and when it does not.

[0021] Figure 10 A schematic diagram of a first antenna and a second antenna in an electronic device provided in another embodiment of this application.

[0022] Figure 11 A schematic diagram of a first antenna and a second antenna in an electronic device provided in another embodiment of this application.

[0023] Figure 12 This is a schematic diagram of a first antenna and a second antenna in an electronic device provided in yet another embodiment of this application.

[0024] Figure 13 This is a schematic diagram of a first antenna and a second antenna in an electronic device provided in yet another embodiment of this application.

[0025] Figure 14 This is a schematic diagram of a first antenna and a second antenna in an electronic device provided in yet another embodiment of this application.

[0026] Figure 15 This is a cross-sectional view of an electronic device provided along line II, which is another embodiment of this application.

[0027] Figure 16 A simulation diagram of the S-parameters of the first antenna in an electronic device 1 provided in an embodiment of this application.

[0028] Figure 17 This is a simulation diagram illustrating the system efficiency of a first antenna in an electronic device provided in an embodiment of this application.

[0029] Figure 18 This is a simulation diagram illustrating the isolation between the first antenna and the second antenna in an electronic device provided in an embodiment of this application.

[0030] Figure 19 A simulation diagram of S parameters of a second antenna in an electronic device according to an embodiment of the present application.

[0031] Figure 20 A simulation diagram of system efficiency of a second antenna in an electronic device according to an embodiment of the present application.

[0032] Figure 21 A simulation diagram of S parameters of a second antenna in an electronic device according to an embodiment of the present application.

[0033] Figure 22 A simulation diagram of system efficiency of a second antenna in an electronic device according to an embodiment of the present application.

[0034] Figure 23 A back view of an electronic device according to an embodiment of the present application.

[0035] Figure 24 A diagram of an inner surface of a battery cover in an electronic device according to an embodiment of the present application.

[0036] Figure 25 A diagram of an inner surface of a battery cover in an electronic device according to an embodiment of the present application. Figure 23 A cross-sectional view along line II-II. DETAILED DESCRIPTION

[0037] The technical solutions in the embodiments of the present application will be apparently and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all the other embodiments obtained by a person of ordinary skill in the art without any creative effort fall within the scope of protection of the present application.

[0038] Reference to "an embodiment" herein means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the present application. The appearances of the phrase that the phrase in various places in the specification are not necessarily all referring to the same embodiment, or are necessarily mutually exclusive in alternative embodiments. It is explicitly understood that the embodiments described herein are intended to be combined.

[0039] The present application provides an electronic device 1, which can be, but is not limited to, any device with communication function. For example, a tablet computer, a mobile phone, an e-book reader, a remote controller, a personal computer (PC), a notebook computer, a vehicle-mounted device, a network television, a wearable device, and the like. In the schematic diagram of the embodiments, the electronic device 1 is taken as a mobile phone.Figures 1 to 5 , Figure 1 is a perspective view of an electronic device according to an embodiment of the present application; Figure 2 is a perspective view of an electronic device according to an embodiment of the present application; Figure 3 is a perspective view of an electronic device according to an embodiment of the present application; Figure 2 is a perspective view of an electronic device according to an embodiment of the present application; Figure 4 is a perspective view of an electronic device according to an embodiment of the present application; Figure 5 is a perspective view of an electronic device according to an embodiment of the present application. The electronic device 1 comprises a middle frame 10, a first excitation source 210, a first filter circuit 220, a second excitation source 310, and a second filter circuit 320. The middle frame 10 comprises a middle frame body 110 and a bezel 120 connected to the periphery of the middle frame body 110. The middle frame body 110 comprises a first slit 113 penetrating through two opposite surfaces of the middle frame body 110 along the edge of the middle frame body 110, and a second slit 1221 is further formed in the bezel 120 adjacent to the first slit 113, and the second slit 1221 is in communication with the first slit 113. The first slit 113 and the second slit 1221 divide the bezel 120 into a first branch 12a. The first excitation source 210 is electrically connected to one end of the first branch 12a, and is configured to feed a first excitation signal to the first branch 12a to excite the first branch 12a as a radiator of a first antenna 20 to resonate in a first frequency band. The second excitation source 310 is connected to the other end of the first branch 12a, and is configured to feed a second excitation signal to the first branch to excite the first branch 12a as a radiator of a second antenna 30 to resonate in a second frequency band. The first filter circuit 220 is electrically connected between the first excitation source 210 and the first branch 12a, and is configured to filter out electromagnetic wave signals of the second frequency band to interfere with the first antenna 20. The second filter circuit 320 is electrically connected between the second excitation source 310 and the first branch 12a, and is configured to filter out electromagnetic wave signals of the first frequency band to interfere with the second antenna 30.

[0040] It should be noted that the terms "first", "second" and the like in the description and claims of the present application and the above drawings are used to distinguish different objects, and are not intended to describe a particular order. In addition, the terms "include" and "have" and any variations thereof are intended to cover non-exclusive inclusion.

[0041] In an embodiment, the frame 120 comprises a first frame 121 and a second frame 122 connected by bending. The first gap 113 corresponds to a part of the first frame 121 and a part of the second frame 122. The second gap 1221 divides the second frame 122 into two parts, one of which is connected to the first frame 121 by bending. The part of the second frame 122 connected to the first frame 121 by bending and the part of the first frame 121 corresponding to the first gap 113 constitute the first branch 12a.

[0042] In the schematic diagram of the embodiment, the first frame 121 is taken as the short frame of the electronic device 1, and the second frame 122 is taken as the long frame of the electronic device 1. It can be understood that in other embodiments, the length of the first frame 121 can also be equal to the length of the second frame 122, or the length of the first frame 121 is less than the length of the second frame 122.

[0043] The material of the middle frame 10 is a conductive material, for example, the material of the middle frame 10 can be but is not limited to aluminum magnesium alloy. The middle frame body 110 is substantially rectangular. Although the embodiment of the application is described by taking the middle frame 10 comprising the first frame 121 and the second frame 122 as an example, it can be understood that the middle frame 10 can also comprise other frames 120. In the electronic device 1, the middle frame 10 can comprise other frames 120 in addition to the first frame 121 and the second frame 122, and all the frames 120 in the middle frame 10 can be connected in sequence and connected to the periphery of the middle frame body 110.

[0044] In an embodiment, the middle frame 10 can also be injection molded with insulating material, which can be but is not limited to plastic. The specific structure of the middle frame 10 is not limited in the application, as long as the middle frame 10 comprises the middle frame body 110 and the frame 120 arranged on the periphery of the middle frame body 110.

[0045] In the embodiment, the first gap 113 and the second gap 1221 are taken as examples in which non-electromagnetic wave shielding material is arranged. Of course, in other embodiments, the first gap 113 and the second gap 1221 can also not be provided with non-electromagnetic wave shielding material. The non-electromagnetic wave shielding medium can be but is not limited to plastic and the like.

[0046] It can be understood that in other embodiments, please refer to Figure 6 , Figure 6A top view of the middle frame in an electronic device according to another embodiment of the present application is provided. In this embodiment, the middle frame 10 includes a middle frame body 110 and at least one bezel 120 connected to the periphery of the middle frame body 110. The first slit 113 is provided corresponding to one of the bezels 120, and the second slit 1221 is formed on the bezel 120 corresponding to the first slit 113. In the schematic diagram of this embodiment, the bezel 120 includes a first bezel 121 and a second bezel 122 connected to each other. The first slit 113 is provided corresponding to the first bezel 121 only, and the second slit 1221 is also provided corresponding to the first bezel 121, and the second slit 1221 communicates with the first slit 113. In other words, the second slit 1221 divides the first bezel 121 into two parts, and the second slit 1221 communicates with the first slit 113.

[0047] In the following embodiments, the first slit 113 corresponds to the first bezel 121 and the second bezel 122 connected to each other, and the second slit 1221 is formed in the second bezel 122.

[0048] The first excitation source 210 is electrically connected to one end of the first branch 12a away from the second slit 1221 to form a first antenna 20. The first antenna 20 transmits and receives electromagnetic wave signals of a first frequency band through the first branch 12a. When the first antenna 20 is used to emit electromagnetic wave signals of the first frequency band, the first excitation source 210 is used to generate a first excitation signal, which is loaded on the first branch 12a via the first filter circuit 220, and the first branch 12a is used to convert the first excitation signal into electromagnetic wave signals of the first frequency band and radiate them out. The first filter circuit 220 is used to filter out the interference of electromagnetic wave signals of a second frequency band in the second antenna 30 on the first antenna 20.

[0049] The second excitation source 310 is electrically connected to the second filter circuit 320 to the one end of the first branch 12a away from the second slit 1221 to form a second antenna 30. The second antenna 30 transmits and receives electromagnetic wave signals of a second frequency band through the first branch 12a. When the second antenna 30 is used to emit electromagnetic wave signals of the second frequency band, the second excitation source 310 is used to generate a second excitation signal, which is loaded on the first branch 12a via the second filter circuit 320, and the first branch 12a is used to convert the second excitation signal into electromagnetic wave signals of the second frequency band and radiate them out. The second filter circuit 320 filters out the interference of electromagnetic wave signals of the first frequency band in the first antenna 20 on the second antenna 30.

[0050] In an embodiment, the first filter circuit 220 comprises a capacitor and an inductor; and the second filter circuit 320 comprises an inductor.

[0051] In an embodiment, the first frequency band is a low frequency of a current communication frequency band, and the first frequency band f1 satisfies 0.7GHz≤f1≤0.96GHz. The second frequency band is a middle-high frequency of a current communication frequency band, and the second frequency band f2 satisfies 1.45GHz≤f2≤2.69GHz. Accordingly, the first filter circuit 220 is a low-pass filter circuit, and the second filter circuit 320 is a band-stop filter circuit. The first frequency band covers a B5 frequency band, a B8 frequency band, a B20 frequency band, and a B28 frequency band. When the first frequency band is the B5 frequency band, the first frequency band f1 satisfies 824MHz≤f1≤894MHz; when the first frequency band is the B8 frequency band, the first frequency band f1 satisfies 880MHz≤f1≤960MHz; when the first frequency band is the B20 frequency band, the first frequency band f1 satisfies 791MHz≤f1≤862MHz; and when the first frequency band is the B28 frequency band, the first frequency band f1 satisfies 704MHz≤f1≤803MHz. The second frequency band covers a B1 frequency band, a B3 frequency band, a B32 frequency band, a B40 frequency band, and a B41 frequency band. When the second frequency band is the B1 frequency band, the second frequency band f2 satisfies 1.92GHz≤f2≤2.17GHz; when the second frequency band is the B3 frequency band, the second frequency band f2 satisfies 1.71GHz≤f2≤1.88GHz; when the second frequency band is the B32 frequency band, the second frequency band f2 satisfies 1.45GHz≤f2≤1.5GHz; when the second frequency band is the B40 frequency band, the second frequency band f2 satisfies 2.3GHz≤f2≤2.4GHz; and when the second frequency band is the B41 frequency band, the second frequency band f2 satisfies 2.5GHz≤f2≤2.69GHz.

[0052] Compared with the prior art, in the electronic device 1 of the present application, the frame 10 is used as the first branch 12a, the first antenna 20 and the second antenna 30 are formed by the same first branch 12a, and the first filter circuit 220 and the second filter circuit 320 are used to avoid interference between the first antenna 20 and the second antenna 30, thereby realizing isolation between the first antenna 20 and the second antenna 30. Therefore, the electronic device 1 of the present application can realize more frequency band coverage in a limited space, realize a larger bandwidth, and has higher communication performance.

[0053] Please refer to Figure 7 , Figure 7This is a schematic diagram of a first antenna and a second antenna in an electronic device according to another embodiment of this application. In one embodiment, the electronic device 1 further includes a switching circuit 330 connected in parallel with the second filter circuit 320, the switching circuit 330 being used to adjust the frequency band range of the second antenna 30. In the schematic diagram of this embodiment, the electronic device 1 includes a switching circuit combined with... Figure 5 The electronic device 1 shown is illustrated as an example.

[0054] Please see Figure 8 , Figure 8 Provided for one embodiment Figure 7 A schematic diagram of the switching circuit is shown. The switching circuit 330 includes a switch 331 and a plurality of adjustable sub-circuits 332. When at least one or more of the plurality of adjustable sub-circuits 332 are electrically connected to the first branch 12a through the switch 331, the plurality of adjustable sub-circuits 332 are used to adjust the frequency band range of the second antenna 30.

[0055] The switch 331 can be an M-to-N selector switch, where M > N, and both M and N are positive integers. For example, M = 4, N = 2, or M = 4, N = 1. Each adjustment circuit includes at least one capacitor. In the schematic diagram of this embodiment, the switch 331 is illustrated as a 4-to-1 selector switch, and the switch circuit 30 includes four parallel adjustment sub-circuits 320 as an example.

[0056] When the electronic device 1 includes a switching circuit 330, and when the first antenna 20 is working, the first excitation signal generated by the first excitation source 210 is transmitted to the first stub 12a through a low-pass filter circuit. At this time, the switch 331 of the second antenna 30 is in the off state. The first filter circuit 220 is used to filter out the interference of electromagnetic waves in the second frequency band to the first antenna 20. For example, when the magnitude of the first frequency band f1 is 0.7GHz≤f1≤0.96GHz, and the magnitude of the second frequency band f2 is 1.45GHz≤f2≤2.69GHz, the first filter circuit 220 is used to filter out the electromagnetic energy of the frequency band f of 1.45GHz≤f≤2.69GHz, so as to avoid the influence of the electromagnetic energy of 1.45GHz≤f≤2.69GHz on the first excitation source 210.

[0057] In one embodiment, the second excitation source 310 is electrically connected to the feed point of the first branch 12a and the length of the first branch 12a adjacent to the end of the first branch 12a near the second gap 1221 is: (λ 20 / 4)±5mm, where, λ 20 The wavelength is the wavelength corresponding to the center frequency of the electromagnetic wave signal in the second frequency band.

[0058] The switch circuit 330 is electrically connected to the connection point of the first branch 12a, and the second excitation source 310 is electrically connected to the feeding point of the first branch 12a. For the convenience of description, the connection point of the first branch 12a electrically connected to the first excitation source 210 is named as the first feeding point A (see Figures 5 to 7 ), and the connection point of the first branch 12a electrically connected to the second excitation source 310 is named as the second feeding point B (see Figures 5 to 7 ). Please refer to Figure 5 again, the switch circuit 330 is electrically connected to the connection point of the first branch 12a, and the length dimension L of the first branch 12a adjacent to one end of the first branch 12a near the slot is equal to L1+L2, wherein L1 is equal to the length from the second feeding point B to the connection point of the first frame 121 and the second frame 122 in the first branch 12a, and L2 is equal to the length of the second frame 122 in the first branch 12a.

[0059] It can be understood that in other embodiments, when the first slot 113 corresponds to the first frame 121 only, and the second slot 1221 corresponds to the first frame 121 and communicates with the first slot 113, the switch circuit 330 is electrically connected to the connection point of the first branch 12a, and the length of the first branch 12a adjacent to one end of the first branch 12a near the second slot 1221 is equal to the length from the second feeding point B to the end of the first branch 12a adjacent to the second slot 1221.

[0060] When the switch circuit 330 is electrically connected to the connection point of the first branch 12a and the length of the first branch 12a adjacent to one end of the first branch 12a near the second slot 1221 is L, wherein λ 20 / 4)±5mm, and λ 20 is the wavelength corresponding to the center frequency point of the electromagnetic wave signal of the second frequency band. At this time, the electrical length of the first branch 12a for transmitting and receiving the electromagnetic wave signal of the second frequency band is exactly matched with the size of the center frequency point of the electromagnetic wave signal of the second frequency band, so that the first branch 12a has a better transmitting and receiving effect when transmitting and receiving the electromagnetic wave signal of the second frequency band. The size of the second frequency band f2 is: 1.45≤f2≤2.69GHz, wherein the center frequency point of the second frequency band is f 20 =[(1.45+2.69) / 2]GHz, and λ 20 =1 / f 20 .

[0061] The switch circuit 330 is connected in parallel with the second filter circuit 320, forming two connection points, one of which is electrically connected to the second branch 12b, and the other of which is not connected to the second branch 12b. The second antenna 30 further comprises a voltage dividing circuit 340. One end of the voltage dividing circuit 340 is electrically connected to the second excitation source 310, and the other end of the voltage dividing circuit 340 is electrically connected to the connection point of the two connection points formed by the switch circuit 330 being connected in parallel with the second filter circuit 320, which is not connected to the second branch 12b. The voltage dividing circuit 340 cooperates with the second filter circuit 320 to make the voltage loaded across the switch circuit 330 less than a preset voltage. In the schematic diagram of the embodiment, the second antenna 30 is taken as an example of simultaneously comprising the switch circuit 330 and the voltage dividing circuit 340. It can be understood that the second antenna 30 can comprise the switch circuit 330 alone, or can comprise the voltage dividing circuit 340 alone.

[0062] In an embodiment, the voltage dividing circuit 340 comprises at least one inductor. When the voltage dividing circuit 340 comprises a plurality of inductors, the plurality of inductors can be connected in series or in parallel, or partially connected in series and partially connected in parallel. The second filter circuit 320 comprises an inductor. The voltage dividing circuit 340 comprises an inductor, and the second filter circuit 320 also comprises an inductor. Therefore, the voltage from the second excitation signal is not all loaded in the switch circuit 330, and the voltage from the second excitation signal is shared by the voltage dividing circuit 340, thereby reducing the voltage loaded across the switch circuit 330, which is beneficial to improving the stability of the device of the switch circuit 330.

[0063] Please refer to Figure 9 , Figure 9 The simulation schematic diagram of the voltage across the switch circuit when the second antenna comprises a voltage dividing circuit and does not comprise a voltage dividing circuit is provided for an embodiment of the application. In Figure 9 , the horizontal axis is frequency, with a unit of GHz, and the vertical axis is voltage, with a unit of V. In the schematic diagram, curve ① represents the simulation schematic diagram of the voltage across the switch circuit 330 when the voltage dividing circuit 340 is not included. Curve ② represents the simulation schematic diagram of the voltage across the switch circuit 330 when the voltage dividing circuit 340 is included. In the schematic diagram, when the second antenna 30 works at the same frequency, the greater the value of the horizontal axis, the higher the voltage across the switch circuit 330. As can be seen from the schematic diagram, the voltage value of curve ① is basically higher than the voltage value of curve ②. In particular, the voltage value of the top point of curve ① is 73.6 V, and the voltage value of the top point of curve ② (which is at the same frequency point as the top point of curve ①) is 57.5 V. It can be seen that, after the voltage dividing circuit 340 is added, the voltage loaded across the switch circuit 330 drops by a larger floating, and the drop amplitude reaches 21.9%

[0064] Reference is made to Figure 10 , Figure 10 The schematic diagram of the first antenna and the second antenna in the electronic device provided by another embodiment of the present application. The second slot 1221 is arranged at the non-end part of the first slot 113, and the first slot 113 and the second slot 1221 also divide the frame 120 into a second branch 12b. The second antenna 30 further comprises a first adjustable circuit 350, one end of the first adjustable circuit 350 is electrically connected to the second branch 12b, and the other end of the first adjustable circuit 350 is grounded. The frequency band of the electromagnetic wave signal transmitted and received by the second antenna 30 through the second branch 12b is different from the frequency band of the electromagnetic wave signal transmitted and received by the second antenna 30 through the first branch 12a, and the first adjustable circuit 350 is used to adjust the frequency band of the electromagnetic wave signal transmitted and received by the second antenna 30 through the second branch 12b.

[0065] The second branch 12b is also called a parasitic branch, and the first adjustable circuit 350 comprises an adjustable capacitor.

[0066] The frequency band of the electromagnetic wave signal transmitted and received by the second antenna 30 through the second branch 12b is different from the frequency band of the electromagnetic wave signal transmitted and received by the second antenna 30 through the first branch 12a, which can make the second antenna 30 meet the requirements of the carrier aggregation (CA) technology. The CA technology requires that the electronic device 1 has a larger bandwidth, for example, requires that the electronic device 1 can support B1 frequency band and B41 frequency band, the second antenna 30 can realize B1 frequency band communication through the first branch 12a, and the second antenna 30 can realize B41 frequency band communication through the second branch 12b and the first adjustable circuit 350. As can be seen, the frame 120 in the electronic device 1 is divided into the second branch 12b, which fully utilizes the frame 120 in the electronic device 1, and then realizes the need of larger bandwidth in the limited space of the electronic device 1 through the cooperation of the first adjustable circuit 350, that is, meets the requirements of the CA technology.

[0067] In the embodiment, the frame 120 comprises a first frame 121 and a second frame 122 connected by bending, and the first slot 113 corresponds to the first frame 121 and the second frame 122. The second slot 1221 is arranged on the second frame 122, and the second branch 12b comprises a part of the second frame 122 corresponding to the first slot 113 and the second slot 1221.

[0068] In the schematic diagram of the embodiment, the second branch 12b comprises a part of the second frame 122 located above the second slot 1221.

[0069] Reference is made to Figure 11 ,Figure 11 The schematic diagram of the first antenna and the second antenna in the electronic device provided by another embodiment of the present application is shown. The electronic device 1 and Figure 10 The structure of the electronic device 1 provided by the related description is basically the same, except that the first slot 113 is arranged corresponding to one of the bezels 120, and the second slot 1221 is arranged on the bezel 120 corresponding to the first slot 113.

[0070] In the schematic diagram of the embodiment, the first slot 113 and the second slot 1221 correspond to the short bezel 120 of the electronic device 1. It can be understood that in other embodiments, the first slot 113 and the second slot 1221 can also correspond to the long bezel 120 of the electronic device 1. In the embodiment, the first branch 12a includes the part of the first bezel 121 located to the right of the second slot 1221 and below the first slot 113. Correspondingly, the second branch 12b includes the part of the first bezel 121 located to the left of the second slot 1221 and below the first slot 113.

[0071] Please refer to Figure 12 , Figure 12 The schematic diagram of the first antenna and the second antenna in the electronic device provided by another embodiment of the present application is shown. In the embodiment, the first antenna 20 further includes a second adjustable circuit 230. The first antenna 20 including the second adjustable circuit 230 can be combined into the electronic device 1 provided by any of the foregoing embodiments. In the schematic diagram of the embodiment, the first antenna 20 including the second adjustable circuit 230 is combined into the electronic device 1 in Figure 10 . One end of the second adjustable circuit 230 is electrically connected to the first branch 12a, and the other end of the second adjustable circuit 230 is grounded. The second adjustable circuit 230 is used to adjust the frequency range of the first antenna 20.

[0072] Specifically, the second adjustable circuit 230 is electrically connected to the connection point of the first branch 12a between the first feeding point A and the second feeding point B.

[0073] In an embodiment, the first antenna 20 further comprises an impedance matching circuit 240. One end of the impedance matching circuit 240 is electrically connected to the first excitation source 210, and the other end of the impedance matching circuit 240 is electrically connected to the first filter circuit 220. The impedance matching circuit 240 is used to match the output impedance of the first excitation source 210 and the input impedance of the first branch 12a. The impedance matching circuit 240 matches the output impedance of the first excitation source 210 and the input impedance of the first branch 12a, so that the first excitation signal generated by the first excitation source 210 is transmitted to the first branch 12a with high efficiency, participating in generating the electromagnetic wave signal of the first frequency band.

[0074] Referring to Figure 13 , Figure 13 A schematic diagram of the first antenna and the second antenna in an electronic device according to another embodiment of the present application is shown. In the schematic diagram of the present embodiment, the second slot 1221 is arranged corresponding to the end of the first slot 113. Specifically, in the present embodiment, the first slot 113 is arranged corresponding to the first frame 121 and the second frame 122. The second slot 1221 is arranged on the second frame 122. At this time, the second antenna 30 does not comprise the second branch 12b.

[0075] Referring to Figure 14 , Figure 14 A schematic diagram of the first antenna and the second antenna in an electronic device according to another embodiment of the present application is shown. In the present embodiment, the first slot 113 is arranged corresponding to the first frame 121 only, and the second slot 1221 is also arranged on the first frame 121, and the second slot 1221 is also arranged corresponding to the end of the first slot 113. At this time, the second antenna 30 does not comprise the second branch 12b.

[0076] Referring to Figure 15 and Figure 1 , Figure 2 the related drawings, Figure 15The electronic device according to another embodiment of the disclosure is provided with a cross-sectional view along line I-I. The electronic device 1 includes a middle frame 10, a circuit board 60, a battery cover 40, and a screen 50. The middle frame 10 includes a middle frame body 110 and a bezel 120 connected to the periphery of the middle frame body. The middle frame body 110 includes a first surface 111 and a second surface 112 arranged oppositely. The first surface 111 is sequentially provided with the circuit board 60 and the battery cover 40 on one side. The second surface 112 is provided with the screen 50 on one side. The middle frame body 110 is provided with a first gap 113 communicating the first surface 111 and the second surface 112, and the first gap 113 corresponds to at least one bezel 120. The surface of the bezel 120 away from the middle frame body 110 constitutes part of the appearance surface of the electronic device 1. The bezel 120 corresponding to the first gap 113 is further provided with a second gap 1221 penetrating the appearance surface. The second gap 1221 communicates the first gap 113 to divide the bezel 120 into a first branch 12a. The first branch 12a includes a first feeding point A and a second feeding point B arranged at intervals. The circuit board 60 is electrically connected to the first branch 12a through the first feeding point A to transmit and receive electromagnetic wave signals of a first frequency band through the first branch 12a. The circuit board 60 is electrically connected to the first branch 12a through the second feeding point B to transmit and receive electromagnetic wave signals of a second frequency band through the first branch 12a.

[0077] The bezel 120 provided with the second gap 1221 is arranged between the screen 50 and the battery cover 40. The surface of the bezel 120 provided with the second gap 1221 away from the middle frame body 110 constitutes part of the appearance surface of the electronic device 1.

[0078] The screen 50 refers to a component for displaying text, images, videos, and the like in the electronic device 1. The screen 50 can be a component having only a display function, or a component integrated with a display and touch functions. In the present embodiment, the screen 50 further includes a screen body 510 for displaying text, images, videos, and the like of the electronic device 1, and a cover plate 520 arranged on the side of the screen body 510 away from the middle frame body 110. The cover plate 520 is used to protect the screen body 510.

[0079] The battery cover 40 can be made of a non-metallic material such as glass or ceramic. The battery cover 40 and the screen 50 are arranged on two surfaces of the middle frame body 110 opposite to each other. The two surfaces are the two surfaces through which the first gap 113 penetrates.

[0080] Compared with the prior art, the electronic device 1 of the present application uses the middle frame 10 as the first branch 12a, uses the first branch 12a to form the radiators of the first antenna 20 and the second antenna 30, and avoids interference between the first antenna 20 and the second antenna 30 through the first filter circuit 220 and the second filter circuit 320, thereby realizing isolation between the first antenna 20 and the second antenna 30. Therefore, the electronic device 1 of the present application can realize more frequency band coverage in a limited space, realize a larger bandwidth, and has higher communication performance.

[0081] In addition, the first branch 12a of the present application only forms a second gap 1221 on the frame 120, and when the surface of the frame 120 with the second gap 1221 away from the middle frame body 110 constitutes part of the appearance of the electronic device 1, the appearance integrity of the electronic device 1 is relatively high.

[0082] In one embodiment, the frequency of the first frequency band is less than the frequency of the second frequency band, and the circuit board 60 is provided with a first excitation source 210, a first filter circuit 220, a second excitation source 310, and a second filter circuit 320. The first excitation source 210 is electrically connected to the first filter circuit 220 to the first feeding point A, the second excitation source 310 is electrically connected to the second filter circuit 320 to the second feeding point B, the first filter circuit 220 is a low-pass filter circuit, and the second filter circuit 320 is a band-stop filter circuit.

[0083] The first excitation source 210, the first filter circuit 220, the second excitation source 310, and the second filter circuit 320 are described above and will not be repeated here.

[0084] In one embodiment, the circuit board 60 is further provided with a switch circuit 330, the switch circuit 330 is connected in parallel with the second filter circuit 320, and the switch circuit 330 is used to adjust the frequency range of the second antenna 30.

[0085] In one embodiment, the length dimension of the second feeding point B adjacent to one end of the second gap 1221 of the first branch 12a is (λ 20 / 4)±5mm, where λ 20 is the wavelength corresponding to the center frequency point of the electromagnetic wave signal of the second frequency band.

[0086] In an embodiment, the circuit board 60 is further provided with a voltage dividing circuit 340. One end of the voltage dividing circuit 340 is electrically connected to the second excitation source 310, and the other end of the voltage dividing circuit 340 is electrically connected to the second filter circuit 320. The voltage dividing circuit 340 cooperates with the second filter circuit 320 to make the voltage loaded on both ends of the switching circuit 330 less than a preset voltage.

[0087] In an embodiment, the voltage dividing circuit 340 and the second filter circuit 320 each include an inductor.

[0088] In an embodiment, the frequency of the first frequency band is less than the frequency of the second frequency band, and the length of the first branch 12a is (λ 10 / 4) ± 5 mm, where λ 10 is the wavelength corresponding to the center frequency point of the electromagnetic wave signal of the first frequency band.

[0089] When the length of the first branch 12a is (λ 10 / 4) ± 5 mm, the length of the first branch 12a matches the size of the center frequency point of the electromagnetic wave signal of the first frequency band, so that the first branch 12a has a better transceiving effect when transceiving the electromagnetic wave signal of the first frequency band. It can be understood that the first antenna 20 is a quarter-wave IFA antenna. At the same time, through the adjustment of the second adjustable circuit, the first antenna 20 can completely cover the low frequency band of 0.7-0.96 GHz.

[0090] In an embodiment, the frame 120 includes a first frame 121 and a second frame 122 connected by bending. The first gap 113 corresponds to a part of the first frame 121 and a part of the second frame 122. The second gap 1221 is formed on the second frame 122, and the second gap 1221 divides the part of the second frame 122 corresponding to the first gap 113 into a first part 12a and a second part 12b (see Figure 7 ). The first part 12a is connected to the first frame 121, the first branch 12a includes the first part 12a and the part of the first frame 121 corresponding to the first gap 113, and the second part 12b constitutes a second branch 12b. The circuit board 60 is further provided with a first adjustable circuit 350, the first adjustable circuit 350 is electrically connected to the second branch 12b, and the first adjustable circuit 350 is used to adjust the frequency band of the electromagnetic wave signal transceived by the second excitation source 310 through the second branch 12b. The frequency band of the electromagnetic wave signal transceived by the second excitation source 310 through the first branch 12a is different from the frequency band of the electromagnetic wave signal transceived by the second excitation source 310 through the second branch 12b.

[0091] In an embodiment, the length of the first frame 121 is less than the length of the second frame 122, and the second gap 1221 is arranged at one end of the second frame 122 adjacent to the first frame 121.

[0092] In the embodiment, when the user holds the electronic device 1, the second gap 1221 can be avoided from being held by the user, thereby avoiding the decline of the communication performance of the first antenna 20 and the second antenna 30 caused by the holding of the second gap 1221.

[0093] The parameters of the electronic device 1 provided in the present application are simulated below to illustrate the performance of the electronic device 1 provided in the present application. Please refer to Figure 16 , Figure 16 The simulation diagram of the S parameter of the first antenna in the electronic device 1 provided in an embodiment of the present application is shown in the figure. In the simulation diagram, the horizontal axis represents the frequency, and the unit is GHz; the vertical axis represents the S parameter, and the unit is dB. The S parameter is the reflection coefficient, which, for an antenna, refers to the ratio of the energy reflected back to the total energy of the excitation signal generated by the excitation source in the antenna. The lower the S parameter, the better, in which case, the energy reflected back from the excitation signal generated by the excitation source in the antenna is less, and more energy participates in radiation. In the simulation diagram, curve ① is the simulation curve of the S parameter of the first antenna 20 in the B5 frequency band; curve ② is the simulation curve of the S parameter of the first antenna 20 in the B8_CH1 sub-band in the B8 frequency band; curve ③ is the simulation curve of the S parameter of the first antenna 20 in the B8_CH2 sub-band in the B8 frequency band; curve ③ is the simulation curve of the S parameter of the first antenna 20 in the B8_CH3 sub-band in the B8 frequency band; curve ④ is the simulation curve of the S parameter of the first antenna 20 in the B20 frequency band; and curve ⑤ is the simulation curve of the S parameter of the first antenna 20 in the B28 frequency band. Taking curve ① as an example, the reflection coefficient of the first antenna 20 in the B5 frequency band is less than -4 dB, which shows that the reflection coefficient of the first antenna 20 in the B5 frequency band is small, in other words, the first antenna 20 has less energy reflected back in the B5 frequency band, and more energy participates in radiation, so the communication effect of the first antenna 20 in the B5 frequency band is good. Similarly, the reflection coefficients of the first antenna 20 in the B8 frequency band, the B20 frequency band, and the B28 frequency band are also small.

[0094] Please refer to Figure 17 , Figure 17A simulation diagram of system efficiency of the first antenna in the electronic device provided by an embodiment of the present application is shown in FIG. 6. In the diagram, the system efficiency is equal to the radiation efficiency multiplied by the reflection coefficient, and the higher the system efficiency is, the better. In the diagram, the horizontal axis represents frequency in GHz, and the vertical axis represents system efficiency in dB. Curve ① is a simulation curve of the system efficiency of the first antenna 20 in the B28 frequency band; curve ② is a simulation curve of the system efficiency of the first antenna 20 in the B20 frequency band; curve ③ is a simulation curve of the system efficiency of the first antenna 20 in the B5 frequency band; curve ④ is a simulation curve of the first antenna 20 in the B8_CH1 sub-band in the B8 frequency band; curve ⑤ is a simulation curve of the first antenna 20 in the B8_CH2 sub-band in the B8 frequency band; and curve ⑥ is a simulation curve of the first antenna 20 in the B8_CH3 sub-band in the B8 frequency band. Taking curve ① as an example, the system efficiency of the B28 frequency band is about -4.5 dB, and thus the first antenna 20 has a high system efficiency in the B28 frequency band. Similarly, the first antenna 20 has a high system efficiency in the B20 frequency band, the B5 frequency band, and the B8 frequency band.

[0095] Referring to Figure 18 , Figure 18 A simulation diagram of isolation of the first antenna and the second antenna in the electronic device provided by an embodiment of the present application is shown in FIG. 7. In the diagram, the horizontal axis represents frequency in GHz, and the vertical axis represents isolation in dB. Curve ① is the energy transmitted from the second antenna 30 to the first antenna 20; and curve ② is the energy transmitted from the first antenna 20 to the second antenna 30. In the diagram, curve ① and curve ② are substantially coincident. In the diagram, the smaller the number on the vertical axis is, the better the isolation is. As shown by point 3 in the diagram, the number is (0.91734, -19.081), and thus the isolation of the first antenna 20 and the second antenna 30 is mostly less than -19 dB, that is, the first antenna 20 and the second antenna 30 have good isolation.

[0096] Referring to Figure 19 , Figure 19A simulation diagram of S parameters of the second antenna in the electronic device provided by an embodiment of the present application is shown in FIG. 6. In the simulation diagram, the horizontal axis represents frequency in GHz, and the vertical axis represents S parameters in dB. The S parameter is a reflection coefficient, which, for an antenna, is a ratio of reflected energy to total energy of an excitation signal generated by an excitation source in the antenna. The lower the S parameter, the better, in which case, less energy of the excitation signal generated by the excitation source in the antenna is reflected back, and more energy is involved in radiation. In the simulation diagram, curve ① is a simulation curve of S parameters of the second antenna 30 in the B1 frequency band; curve ② is a simulation curve of S parameters of the second antenna 30 in the B3 frequency band; curve ③ is a simulation curve of S parameters of the second antenna 30 in the B32 frequency band; curve ④ is a simulation curve of S parameters of the second antenna 30 in the B40 frequency band; and curve ⑤ is a simulation curve of S parameters of the second antenna 30 in the B41 frequency band. Taking curve ① as an example, the S parameters of the second antenna 30 in the B1 frequency band are less than -4 dB, so it can be seen that the reflection coefficient of the second antenna 30 in the B1 frequency band is small. In other words, the second antenna 30 has less energy reflected back in the B1 frequency band, and more energy is involved in radiation, so the communication effect of the second antenna 30 in the B1 frequency band is better. Similarly, the reflection coefficients of the second antenna 30 in the B3 frequency band, the B32 frequency band, the B40 frequency band, and the B41 frequency band are also small.

[0097] Referring to Figure 20 , Figure 20 A simulation diagram of system efficiency of the second antenna in the electronic device provided by an embodiment of the present application is shown in FIG. 7. The system efficiency is equal to the radiation efficiency multiplied by the reflection coefficient, and the higher the system efficiency, the better. In the simulation diagram, the horizontal axis represents frequency in GHz, and the vertical axis represents system efficiency in dB; curve ① is a simulation curve of system efficiency of the second antenna 30 in the B3 frequency band; curve ② is a simulation curve of system efficiency of the second antenna 30 in the B1 frequency band; curve ③ is a simulation curve of system efficiency of the second antenna 30 in the B32 frequency band; curve ④ is a simulation curve of system efficiency of the second antenna 30 in the B40 frequency band; and curve ⑤ is a simulation curve of system efficiency of the second antenna 30 in the B41 frequency band. In the simulation diagram, taking curve ① as an example, the system efficiency of the B3 frequency band is about -4 dB, so it can be seen that the second antenna 30 has high system efficiency in the B3 frequency band. Similarly, the system efficiencies of the second antenna 30 in the B1 frequency band, the B32 frequency band, the B40 frequency band, and the B41 frequency band are also high.

[0098] Referring to Figure 21 , Figure 21The simulation diagram of the S parameter of the second antenna in the electronic device provided by an embodiment of the present application is shown in FIG. 6. In the simulation diagram, the horizontal axis represents frequency, in GHz, and the vertical axis represents the S parameter, in dB. The S parameter is the reflection coefficient, which, for an antenna, is the ratio of the energy reflected back to the total energy of the excitation signal generated by the excitation source in the antenna. The lower the S parameter, the better, in which case, the energy reflected back from the excitation signal generated by the excitation source in the antenna is less, and more energy participates in radiation. In the simulation diagram, the S parameter of the second antenna 30 in the frequency band of 1.71-2.69 GHz is less than -2 dB, that is, the S parameter of the second antenna 30 in the frequency band of 1.71-2.69 GHz is relatively small. As can be seen, the second antenna 30 covers a relatively wide frequency band while also taking into account the S parameter, so the electronic device 1 of the present application has a large bandwidth and good communication quality in the second frequency band in which the second antenna 30 operates.

[0099] Referring to Figure 22 , Figure 22 The simulation diagram of the system efficiency of the second antenna in the electronic device provided by an embodiment of the present application is shown in FIG. 7. In the simulation diagram, the horizontal axis represents frequency, in GHz, and the vertical axis represents the system efficiency, in dB; the higher the system efficiency, the better. Curve ① is the simulation curve of the system efficiency of the second antenna 30 including the second branch 12b. Point 1 is the system efficiency of the lowest frequency point of the second antenna 30 in the B3 frequency band, and point 2 is the system efficiency of the highest point of the second antenna 30 in the B41 frequency band. When the second antenna 30 includes the second branch 12b, the corresponding frequency band is located between point 1 and point 2, and the system efficiency is greater than or equal to -7.3 dB, having a high system efficiency.

[0100] From the above simulation diagrams, it can be seen that the first antenna 20 and the second antenna 30 have good isolation, the first antenna 20 and the second antenna 30 have small S parameters, and have high system efficiency, so the electronic device 1 of the present application has good communication effect.

[0101] It can be understood that, although the electronic device 1 includes the middle frame 10 in the foregoing various embodiments of the present application, and the first antenna 20 and the second antenna 30 are formed on the middle frame 10, but the above embodiments should not be understood as a limitation of the present application. The first branch 12a and the second branch 12b in the first antenna 20 and the second antenna 30 can also be formed on other components. For example, when the electronic device 1 includes a conductive battery cover 40 (such as a metal battery cover), the first branch 12a and the second branch 12b of the first antenna 20 and the second antenna 30 can also be formed on the battery cover 40. The conductive battery cover 40 and the middle frame 10 are only a specific form of the shell of the electronic device 1. Of course, the shell is not limited to the conductive battery cover 40 and the middle frame 10 in the electronic device 1, as long as the first branch 12a and the second branch 12b of the first antenna 20 and the second antenna 30 can be formed.

[0102] When the first branch 12a and the second branch 12b of the first antenna 20 and the second antenna 30 form the shell of the electronic device 1 as the conductive battery cover 40, it is consistent with the case that the first branch 12a and the second branch 12b of the first antenna 20 and the second antenna 30 form the shell as the middle frame 10. The following will be described in detail with reference to Figures 23-25 , specifically, please refer to Figure 23 , Figure 24 and Figure 25 , Figure 23 the back view schematic diagram of the electronic device provided by an embodiment of the present application; Figure 24 the schematic diagram of the inner surface of the battery cover in the electronic device of the present application; Figure 25 the schematic diagram of the section along the line II-II in Figure 23 The shell 70 includes a body 710 and a frame 720 connected to the periphery of the body 710. The periphery of the body 710 is provided with a first gap 113 penetrating through the opposite surfaces of the body 710, which separates at least a part of the frame 720 from the body 710. The frame 720 is provided with a second gap 1221 communicating with the first gap 113.

[0103] Compared with the prior art, the electronic device 1 of the present application forms the first branch 12a by using the shell 70, forms the radiators of the first antenna 20 and the second antenna 30 by using the first branch 12a, and avoids the interference between the first antenna 20 and the second antenna 30 by using the first filter circuit 220 and the second filter circuit 320, thereby realizing the isolation between the first antenna 20 and the second antenna 30. Therefore, the electronic device 1 of the present application can realize more frequency band coverage in a limited space, realize a larger bandwidth, and has higher communication performance.

[0104] When the shell 70 is the electrically conductive battery cover 40, the shell 70 forms a receiving space for receiving the middle frame 10, the circuit board 60 and the screen 50. The circuit board 60 is disposed on the side of the middle frame 10 facing the battery cover 40, and the screen 50 is disposed on the side of the middle frame 10 facing the circuit board 60. The circuits of the first antenna 20 and the second antenna 30 are disposed on the circuit board 60. For example, the first excitation source 210, the first filter circuit 220, the second excitation source 310, and the second filter circuit 320 are disposed on the circuit board 60.

[0105] It can be understood that when the shell 70 is the electrically conductive battery cover 40, the electronic device 1 also includes the various circuits and sub-circuits when the shell 70 is the middle frame 10. The various circuits are described above and will not be repeated here. When the shell 70 is the electrically conductive battery cover 40, the relationship between the first gap 113 and the second gap 1221 compared to other parts of the shell 70 is the same as the embodiment when the shell 70 is the middle frame 10, and will not be repeated here.

[0106] It can be understood that in the background art detailed embodiments of the present application, the first antenna 20 operates in the first frequency band, the size of the first frequency band is: 0.7GHz≤f1≤0.96GHz, and the second antenna 30 operates in the second frequency band, the size of the second frequency band is: 1.45GHz≤f2≤2.69GHz. The above description of the first antenna 20 and the second antenna 30 cannot be understood as a limitation of the first antenna 20 and the second antenna 30 of the present application. In other embodiments, the first antenna 20 and the second antenna 30 can also be antennas supporting other frequency bands.

[0107] Although the embodiments of the present application have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as a limitation of the present application. Those skilled in the art can make changes, modifications, replacements and variations to the above embodiments within the scope of the present application, and these improvements and refinements are also considered as the protection scope of the present application.

Claims

1. An electronic device, comprising: The electronic device comprises: a middle frame comprising a middle frame body and a bezel connected to the periphery of the middle frame body, the middle frame body comprising a first slit penetrating through two opposite surfaces of the middle frame body, and a second slit being formed in the bezel adjacent to the first slit, the second slit being communicated with the first slit, and the first slit and the second slit dividing the bezel into a first branch; a first excitation source electrically connected to one end of the first branch for feeding a first excitation signal into the first branch to excite the first branch as a radiator of a first antenna resonating in a first frequency band; a second excitation source electrically connected to the other end of the first branch for feeding a second excitation signal into the first branch to excite the first branch as a radiator of a second antenna resonating in a second frequency band; a first filter circuit electrically connected between the first excitation source and the first branch for filtering electromagnetic wave signals of the second frequency band to interfere with the first antenna; a second filter circuit electrically connected between the second excitation source and the first branch for filtering electromagnetic wave signals of the first frequency band to interfere with the second antenna; wherein the second slit is arranged at a non-end portion of the first slit, the first slit and the second slit further divide the bezel into a second branch, the second antenna further comprises a first adjustable circuit, one end of the first adjustable circuit being electrically connected to the second branch, the other end of the first adjustable circuit being grounded, and the first adjustable circuit being used for adjusting the frequency band of the electromagnetic wave signals transmitted and received by the second antenna through the second branch; the frequency band of the electromagnetic wave signals transmitted and received by the second antenna through the second branch is different from the frequency band of the electromagnetic wave signals transmitted and received by the second antenna through the first branch, so that the second antenna supports carrier aggregation of the second frequency band, and the frequency of the first frequency band is less than the frequency of the second frequency band.

2. The electronic device of claim 1, wherein, The second excitation source is electrically connected to the feeding point of the first branch and the length dimension of the first branch adjacent to one end of the second slot is: (λ 20 / 4) ± 5mm, wherein λ 20 is the wavelength corresponding to the center frequency point of the electromagnetic wave signal of the second frequency band.

3. The electronic device of claim 1, wherein, The electronic device further comprises a switching circuit comprising a switch and a plurality of adjustable sub-circuits, when at least one or more of the plurality of adjustable sub-circuits are electrically connected to the first branch through the switch, the plurality of adjustable sub-circuits are used for adjusting the frequency range of the second antenna.

4. The electronic device of claim 1, wherein, The bezel comprises a first bezel and a second bezel connected by bending, the first slit corresponds to the first bezel and the second bezel, the second slit is formed in the second bezel, and the second branch comprises a part of the second bezel corresponding to the first slit and the second slit.

5. The electronic device of claim 1, wherein, The number of the bezels is at least one, the first slit is arranged corresponding to one of the bezels, and the second slit is formed in the bezel corresponding to the first slit.

6. The electronic device of claim 1, wherein, The first antenna further comprises a second adjustable circuit, one end of the second adjustable circuit being electrically connected to the first branch, the other end of the second adjustable circuit being grounded, and the second adjustable circuit being used for adjusting the frequency range of the first antenna.

7. The electronic device of claim 1, wherein, The first antenna further comprises an impedance matching circuit, one end of the impedance matching circuit is electrically connected to the first excitation source, and the other end of the impedance matching circuit is electrically connected to the first filter circuit, and the impedance matching circuit is used for matching the output impedance of the first excitation source and the input impedance of the first branch.

8. An electronic device, comprising: The electronic device comprises a housing and a circuit board, the housing comprises a body and a frame connected to the periphery of the body, a first gap is formed in the periphery of the body and penetrates through the opposite two surfaces of the body, the first gap separates at least part of the frame from the body, a second gap is formed in the frame and communicates with the first gap, the first gap and the second gap divide the frame into a first branch, the first branch has a first feeding point and a second feeding point arranged at intervals, the circuit board comprises a first excitation source, a second excitation source, a first filter circuit and a second filter circuit, the first excitation source is electrically connected to the first feeding point, the second excitation source is electrically connected to the second feeding point, the first filter circuit is used for filtering out the interference of the second antenna on the first antenna, and the second filter circuit is used for filtering out the interference of the first antenna on the second antenna. The frame comprises a first frame and a second frame connected by bending, the first gap corresponds to part of the first frame and part of the second frame, the second gap is formed in the second frame, and the second gap divides the part of the second frame corresponding to the first gap into a first part and a second part, wherein the first part is connected to the first frame, the first branch comprises the first part and the part of the first frame corresponding to the first gap, the second part constitutes a second branch, a first adjustable circuit is further arranged on the circuit board, the first adjustable circuit is electrically connected to the second branch, the first adjustable circuit is used for adjusting the frequency band of the electromagnetic wave signal transmitted and received by the second excitation source through the second branch, the frequency band of the electromagnetic wave signal transmitted and received by the second excitation source through the first branch is different from the frequency band of the electromagnetic wave signal transmitted and received by the second excitation source through the second branch, so that the second antenna supports carrier aggregation of a second frequency band, the first antenna resonates in a first frequency band, the second antenna resonates in a second frequency band, and the frequency of the first frequency band is less than the frequency of the second frequency band.

9. The electronic device of claim 8, wherein, The second feeding point is adjacent to the second gap compared with the first feeding point, the first filter circuit is a low-pass filter circuit, and the second filter circuit is a band-stop filter circuit.

10. The electronic device of claim 8, wherein, The length dimension of the second feeding point adjacent to one end of the second slot is: (λ 20 / 4) ± 5mm, wherein λ 20 is the wavelength corresponding to the central frequency point of the electromagnetic wave signal of the second frequency band.

11. The electronic device of claim 8, wherein, The circuit board further comprises a voltage dividing circuit, and the voltage dividing circuit and the second filter circuit both comprise an inductor.

12. The electronic device of claim 8, wherein, The length of the first branch is: (λ 10 / 4) ± 5mm, wherein λ 10 is a wavelength corresponding to a central frequency point of an electromagnetic wave signal of the first frequency band, and the first excitation source excites the first branch as a radiator of a first antenna to resonate in the first frequency band, and the second excitation source excites the first branch as a radiator of a second antenna to resonate in the second frequency band.

13. The electronic device of claim 8, wherein, The length of the first frame is less than the length of the second frame, and the second gap is formed in one end of the second frame adjacent to the first frame.

Images