CN111193101A

CN111193101A - Electronic device

Info

Publication number: CN111193101A
Application number: CN202010105564.7A
Authority: CN
Inventors: 贾玉虎
Original assignee: Guangdong Oppo Mobile Telecommunications Corp Ltd
Current assignee: Guangdong Oppo Mobile Telecommunications Corp Ltd
Priority date: 2020-02-20
Filing date: 2020-02-20
Publication date: 2020-05-22

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 center includes the center body, and connects at the peripheral frame of center body, and the center body includes first gap, still sets up the second gap in first gap of intercommunication on the frame adjacent with first gap to split into first minor matters with the frame. The first excitation source feeds a first excitation signal into the first branch so as to excite the first antenna, as a radiator, of the first branch to resonate in a first frequency band. The second excitation source feeds a second excitation signal into the first branch so as to excite a second antenna of which the first branch is used as a radiator to resonate in a second frequency band. The first filter circuit is electrically connected between the first excitation source and the first branch knot and is used for filtering the interference of the electromagnetic wave signals of the second frequency band to the first antenna. And the second filter circuit is electrically connected between the second excitation source and the first branch knot and is used for filtering the interference of the electromagnetic wave signals of the first frequency band on the second antenna. The equipment has a better communication effect.

Description

Electronic device

Technical Field

The present application relates to the field of communications technologies, and in particular, to an electronic device.

Background

With the development of mobile communication technology, smart phones with communication functions are more and more favored by users. Along with the functions of the smart phone are more and more, the number of stacked devices in the smart phone is more and more, and the space reserved for an antenna in the smart phone is smaller and smaller. The antenna space in the smart phone is small, so that the antenna headroom is limited, and the antenna bandwidth is also limited. Therefore, the communication performance of the antenna in the conventional smart phone needs to be improved.

Disclosure of Invention

The application provides an electronic device, including:

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 two opposite surfaces of the middle frame body, a second gap is further formed in the frame adjacent to the first gap and communicated with the first gap, and the frame is divided into first branches by the first gap and the second gap;

the first excitation source is electrically connected with one end of the first branch knot and used for feeding a first excitation signal into the first branch knot so as to excite the first antenna of which the first branch knot is used as a radiating body to resonate in a first frequency band;

the second excitation source is electrically connected with the other end of the first branch and is used for feeding a second excitation signal into the first branch so as to excite a second antenna of which the first branch serves as a radiating body to resonate in a second frequency band;

the first filter circuit is electrically connected between the first excitation source and the first branch knot and is used for filtering the interference of the electromagnetic wave signals of the second frequency band to the first antenna; and

and the second filter circuit is electrically connected between the second excitation source and the first branch knot and is used for filtering the interference of the electromagnetic wave signals of the first frequency band on the second antenna.

The application also provides an electronic device, which comprises a housing and a circuit board, wherein the housing comprises a body and a frame connected to the periphery of the body, the body comprises a first surface and a second surface which are oppositely arranged, the periphery of the body is provided with a first gap which runs through the first surface and the second surface, the first gap isolates at least one part of the frame from the body, the frame is provided with a second gap communicated with the first gap, the frame is divided into first branches by the first gap and the second gap, the first branches have first feeding points and second feeding points which are 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 with the first feeding points, the second excitation source is electrically connected with the second feeding points, the first filter circuit is used for filtering interference of a second antenna where the second excitation source is located to a first antenna where the first excitation source is located, and the second filter circuit is used for filtering interference of the first antenna where the first excitation source is located to the second antenna where the second excitation source is located.

Compared with the prior art, the electronic device of the application utilizes the middle frame or the shell as the first branch, utilizes the first branch to form the radiator 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, thereby realizing the isolation between the first antenna and the second antenna. Therefore, the electronic equipment can realize more frequency band coverage in a limited space, realize larger bandwidth and have higher communication performance.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.

Fig. 1 is a schematic perspective view of an electronic device according to an embodiment of the present disclosure.

Fig. 2 is a perspective view of an electronic device according to an embodiment of the present application.

Fig. 3 is a perspective view of the middle frame shown in fig. 2 at another angle.

Fig. 4 is a top view of a middle frame in an electronic device according to an embodiment of the present application.

Fig. 5 is a schematic diagram of a first antenna and a second antenna in an electronic device according to an embodiment of the present application.

Fig. 6 is a top view of a middle frame in an electronic device according to another embodiment of the present application.

Fig. 7 is a schematic diagram of a first antenna and a second antenna in an electronic device according to another embodiment of the present application.

FIG. 8 is a schematic diagram of the switch circuit of FIG. 7 according to an embodiment.

Fig. 9 is a simulation diagram of voltages across a switch circuit when a second antenna includes a voltage divider circuit and does not include a voltage divider circuit according to an embodiment of the present disclosure.

Fig. 10 is a schematic diagram of a first antenna and a second antenna in an electronic device according to another embodiment of the present application.

Fig. 11 is a schematic diagram of a first antenna and a second antenna in an electronic device according to another embodiment of the present application.

Fig. 12 is a schematic view of a first antenna and a second antenna in an electronic device according to yet another embodiment of the present application.

Fig. 13 is a schematic diagram of a first antenna and a second antenna in an electronic device according to yet another embodiment of the present application.

Fig. 14 is a schematic view of a first antenna and a second antenna in an electronic device according to yet another embodiment of the present application.

Fig. 15 is a schematic cross-sectional view of an electronic device taken along line I-I according to still another embodiment of the present application.

Fig. 16 is a simulation diagram of an S parameter of a first antenna in the electronic device 1 according to an embodiment of the present application.

Fig. 17 is a simulation diagram of system efficiency of a first antenna in an electronic device according to an embodiment of the present application.

Fig. 18 is a simulation diagram of isolation between a first antenna and a second antenna in an electronic device according to an embodiment of the present application.

Fig. 19 is a simulation diagram of an S parameter of a second antenna in an electronic device according to an embodiment of the present application.

Fig. 20 is a simulation diagram of system efficiency of a second antenna in an electronic device according to an embodiment of the present application.

Fig. 21 is a simulation diagram of an S parameter when a second antenna in an electronic device includes a second branch according to an embodiment of the present application.

Fig. 22 is a simulation diagram of system efficiency when a second branch is included in a second antenna in an electronic device according to an embodiment of the present application.

Fig. 23 is a schematic rear view of an electronic device according to an embodiment of the present application.

Fig. 24 is a schematic view of a battery cover from an inner surface in an electronic device according to the present application.

Fig. 25 is a schematic sectional view taken along line II-II in fig. 23.

Detailed Description

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without inventive step, are within the scope of the present disclosure.

Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the application. The appearances of the phrase in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. It is explicitly and implicitly understood by one skilled in the art that the embodiments described herein can be combined with other embodiments.

The present application provides an electronic device 1, which electronic device 1 may be, but is not limited to, any device having a communication function. For example: the system comprises intelligent equipment with a communication function, such as a tablet Computer, a mobile phone, an electronic reader, a remote controller, a Personal Computer (PC), a notebook Computer, vehicle-mounted equipment, a network television, wearable equipment and the like. In the schematic diagram of the embodiment, the electronic device 1 is taken as a mobile phone for example. Referring to fig. 1 to 5, fig. 1 is a schematic perspective view of an improved electronic device according to an embodiment of the present disclosure; fig. 2 is a schematic perspective view of an electronic device according to an embodiment of the present application; FIG. 3 is a perspective view of the middle frame shown in FIG. 2 at another angle; fig. 4 is a top view of a middle frame in an electronic device according to an embodiment of the present application; fig. 5 is a schematic diagram of a first antenna and a second antenna in an electronic device according to an embodiment of the present application. The electronic device 1 includes 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 includes a middle frame body 110, and a rim 120 connected to the periphery of the middle frame body 110. The middle frame body 110 includes a first gap 113 that penetrates through two opposite surfaces of the middle frame body 110 along an edge of the middle frame body 110, a second gap 1221 is further opened on the frame 120 adjacent to the first gap 113, and the second gap 1221 is communicated with the first gap 113. The first slit 113 and the second slit 1221 divide the frame 120 into the first branches 12 a. 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, so as to excite the first antenna 20, serving as a radiator, of the first branch 12a 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 into the first branch, so as to excite the second antenna 30, which uses the first branch 12a as a radiator, 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 interference of the electromagnetic wave signal of the second frequency band to 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 interference of electromagnetic wave signals in the first frequency band to the second antenna 30.

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 of the "first slit 113" and the "second slit 1221" and the like are used for distinguishing different objects, and are not used for describing a specific order. Furthermore, the terms "include" and "have," as well as any variations thereof, are intended to cover non-exclusive inclusions.

In one embodiment, the frame 120 includes a first frame 121 and a second frame 122 connected by bending. The first gap 113 corresponds to a portion of the first frame 121 and a portion of the second frame 122. The second slit 1221 divides the second frame 122 into two parts, wherein one part of the second frame 122 is connected to the first frame 121 by bending. The portion of the second frame 122 bent and connected to the first frame 121 and the portion of the first frame 121 corresponding to the first slit 113 form the first branch 12 a.

In the schematic diagram of the embodiment, the first frame 121 is taken as a short frame of the electronic device 1, and the second frame 122 is taken as a long frame of the electronic device 1 for example. It is understood that in other embodiments, the length of the first frame 121 may be equal to the length of the second frame 122, or the length of the first frame 121 may be smaller than the length of the second frame 122.

The middle frame 10 is made of a conductive material, for example, the middle frame 10 may be made of, but not limited to, aluminum magnesium alloy. The middle frame body 110 is substantially rectangular. Although the middle frame 10 in the embodiment of the present application is described as including the first frame 121 and the second frame 122 connected to each other, it should be understood that the middle frame 10 may further include other frames 120. In the electronic device 1, the middle frame 10 may further include other frames 120 besides the first frame 121 and the second frame 122, and all the frames 120 in the middle frame 10 may be connected end to end and connected to the periphery of the middle frame body 110.

In one embodiment, the middle frame 10 may be further injection molded with an insulating material, which may be, but is not limited to, plastic. The specific structure of the middle frame 10 is not limited in this application, as long as the middle frame 10 includes a middle frame body 110 and a frame 120 disposed on the periphery of the middle frame body 110.

In the present embodiment, it is illustrated that a non-electromagnetic wave shielding material is disposed in the first slot 113 and the second slot 1221. Of course, in other embodiments, no non-electromagnetic wave shielding material may be disposed in the first gap 113 and the second gap 1221. The non-electromagnetic wave shielding medium may be, but is not limited to, plastic, etc.

In other embodiments, please refer to fig. 6, and fig. 6 is a top view of a middle frame in an electronic device according to another embodiment of the present application. In this embodiment, the middle frame 10 includes a middle frame body 110 and at least one side frame 120 bent and connected from the periphery of the middle frame body 110. The first slit 113 is disposed corresponding to one of the frames 120, and the second slit 1221 is disposed on the frame 120 corresponding to the first slit 113. In the schematic view of the present embodiment, the frame 120 includes a first frame 121 and a second frame 122 connected by bending. The first slit 113 is disposed only corresponding to the first frame 121, the second slit 1221 is also disposed corresponding to the first frame 121, and the second slit 1221 is communicated with the first slit 113. In other words, the second slit 1221 divides the first frame 121 into two parts, and the second slit 1221 communicates with the first slit 113.

In the following embodiments, the first gap 113 is illustrated as corresponding to the first frame 121 and the second frame 122 which are bent and connected, and the second gap 1221 is disposed in the second frame 122.

The first excitation source 210 is electrically connected to an end of the first branch 12a facing away from the second slot 1221 to form a first antenna 20. The first antenna 20 receives and transmits electromagnetic wave signals of a first frequency band through the first branch 12 a. When the first antenna 20 is configured to emit an electromagnetic wave signal in a first frequency band, the first excitation source 210 is configured to generate a first excitation signal, the first excitation signal is loaded on the first branch 12a via the first filter circuit 220, and the first branch 12a is configured to convert the first excitation signal into an electromagnetic wave signal in the first frequency band and radiate the electromagnetic wave signal. The first filter circuit 220 is configured to filter interference of the electromagnetic wave signal of the second frequency band in the second antenna 30 to the first antenna 20.

The second excitation power source electrically connects the second filter circuit 320 to an end of the first branch 12a away from the second slot 1221 to form a second antenna 30. The second antenna 30 receives and transmits electromagnetic wave signals of a second frequency band through the first branch 12 a. When the second antenna 30 is used for transmitting an electromagnetic wave signal in a second frequency band, the second excitation source 310 is used for generating a second excitation signal, the second excitation signal is loaded on the first branch 12a through the second filter circuit 320, and the first branch 12a is used for converting the second excitation signal into an electromagnetic wave signal in the second frequency band and radiating the electromagnetic wave signal. The second filter circuit 320 filters interference of the electromagnetic wave signal of the first frequency band in the first antenna 20 to the second antenna 30.

In one embodiment, the first filter circuit 220 includes a capacitor and an inductor; the second filter circuit 320 includes an inductor.

In one embodiment, the first frequency band is a low frequency of a current communication frequency band, and the size of the first frequency band f1 is: f1 is more than or equal to 0.7GHz and less than or equal to 0.96 GHz. The second frequency band is a medium-high frequency band of the current communication frequency band, and the size of the second frequency band f2 is as follows: f2 is more than or equal to 1.45GHz and less than or equal to 2.69 GHz. 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 frequency bands of B5, B8, B20 and B28. When the first frequency band is a B5 frequency band, the size of the first frequency band f1 satisfies: f1 is more than or equal to 824MHz and less than or equal to 894 MHz; when the first frequency band is a B8 frequency band, the size of the first frequency band f1 satisfies: f1 is more than or equal to 880MHz and less than or equal to 960 MHz; when the first frequency band is a B20 frequency band, the size of the first frequency band f1 satisfies: f1 is more than or equal to 791MHz and less than or equal to 862 MHz; when the first frequency band is a B28 frequency band, the size of the first frequency band f1 satisfies: f1 is more than or equal to 704MHz and less than or equal to 803 MHz. The second frequency band covers a range of B1 frequency band, B3 frequency band, B32 frequency band, B40 frequency band, and B41 frequency band. When the second frequency band is a B1 frequency band, the size of the second frequency band f2 satisfies: f2 is more than or equal to 1.92GHz and less than or equal to 2.17 GHz; when the second frequency band is a B3 frequency band, the size of the second frequency band f2 satisfies: f2 is more than or equal to 1.71GHz and less than or equal to 1.88 GHz; when the second frequency band is a B32 frequency band, the size of the second frequency band f2 satisfies: f2 is more than or equal to 1.45GHz and less than or equal to 1.5 GHz; when the second frequency band is a B40 frequency band, the size of the second frequency band f2 satisfies: f2 is more than or equal to 2.3GHz and less than or equal to 2.4 GHz; when the second frequency band is a B41 frequency band, the size of the second frequency band f2 satisfies: f2 is more than or equal to 2.5GHz and less than or equal to 2.69 GHz.

Compared with the prior art, in the electronic device 1 of the present application, the frame 120 of the middle frame 10 is used as the first branch 12a, the same first branch 12a is used to form the first antenna 20 and the second antenna 30, 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, so as to achieve isolation between the first antenna 20 and the second antenna 30. Therefore, the electronic device 1 of the present application can implement more frequency band coverage in a limited space, implement a larger bandwidth, and have a higher communication performance.

Referring to fig. 7, fig. 7 is a schematic view of a first antenna and a second antenna in an electronic device according to another embodiment of the present application. In an embodiment, the electronic device 1 further includes a switch circuit 330, the switch circuit 330 is connected in parallel with the second filter circuit 320, and the switch circuit 330 is configured to adjust a frequency band range of the second antenna 30. In the schematic diagram of the present embodiment, the electronic apparatus 1 including the switch circuit is exemplified as being incorporated in the electronic apparatus 1 shown in fig. 5.

Referring to fig. 8, fig. 8 is a schematic diagram of the switch circuit in fig. 7 according to an embodiment. The switching circuit 330 includes a switch 331 and a plurality of regulation subcircuits 332. When at least one or more of the adjustable sub-circuits 332 is electrically connected to the first branch 12a through the switch 331, the adjustable sub-circuits 332 are used to adjust the frequency band range of the second antenna 30.

The switch 331 can be an M-to-N selection switch, where M > N, and M and N are positive integers. For example, M is 4 and N is 2, or M is 4 and N is 1. Each regulating circuit comprises at least one capacitor. In the schematic diagram of the present embodiment, the switch 331 is exemplified as a 4-to-1 selection switch, and the switch circuit 30 includes 4 parallel regulator sub-circuits 320.

When the electronic device 1 includes the switch circuit 330, and when the first antenna 20 is operated, the first excitation signal generated by the first excitation source 210 is transmitted to the first branch 12a through the low-pass filter circuit, and at this time, the switch 331 of the second antenna 30 is in an off state. The first filter circuit 220 is configured to filter interference of the electromagnetic wave in the second frequency band to the first antenna 20. For example, when the size of the first frequency band f1 is: f1 is more than or equal to 0.7GHz and less than or equal to 0.96GHz, and the size of the second frequency band f2 is as follows: when f2 is greater than or equal to 1.45GHz and less than or equal to 2.69GHz, the first filter circuit 220 is configured to set the frequency band f as: and f is more than or equal to 1.45GHz and less than or equal to 2.69GHz, so that the electromagnetic energy with f being more than or equal to 1.45GHz and less than or equal to 2.69GHz is prevented from influencing the first excitation source 210.

In one embodiment, the length of the feeding point of the second driving source 310 electrically connected to the first branch 12a and the first branch 12a at the end of the first branch 12a adjacent to the second slot 1221 are: (lambda₂₀/4) ± 5mm, wherein λ₂₀The wavelength is the wavelength corresponding to the central frequency point of the electromagnetic wave signal of the second frequency band.

The switch circuit 330 is electrically connected to the electrical connection point of the first branch 12 a. the second excitation source 310 is electrically connected to the feeding point of the first branch 12 a. For convenience of description, a connection point at which the first branch 12a is electrically connected to the first driving source 210 is named as a first feeding point a (see fig. 5 to 7), and a connection point at which the first branch 12a is electrically connected to the second driving source 310 is named as a second feeding point B (see fig. 5 to 7). Referring to fig. 5 again, the length L of the switch circuit 330, which is electrically connected to the connection point of the first branch 12a and the first branch 12a at the end of the first branch 12a adjacent to 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 of the first branch 12 a; l2 is equal to the length of second rim 122 in first branch 12 a.

It is understood that, in other embodiments, when the first slot 113 is only disposed corresponding to the first frame 121 and the second slot 1221 is correspondingly disposed through the first frame 121 and communicated with the first slot 113, the length of the first branch 12a, which is electrically connected to the connection point of the first branch 12a and the end of the first branch 12a adjacent to 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.

When the length L of the connection point of the switch circuit 330 electrically connected to the first branch 12a and the first branch 12a at the end of the first branch 12a adjacent to the second slot 1221 is: (lambda₂₀/4) ± 5mm, wherein λ₂₀The wavelength is the wavelength corresponding to the central frequency point of the electromagnetic wave signal of the second frequency band. At this time, the electrical length of the first branch 12a for receiving and transmitting the electromagnetic wave signal of the second frequency band is just matched with the size of the central frequency point for radiating the electromagnetic wave signal of the second frequency band, so that the first branch 12a has a better receiving and transmitting effect when receiving and transmitting the electromagnetic wave signal of the second frequency band. The size of the second frequency band f2 is: f2 is more than or equal to 1.45 and less than or equal to 2.69GHz, wherein the center frequency point of the second frequency band is f₂₀＝[(1.45+2.69)/2]GHz, said λ₂₀＝1/f₂₀。

The switch circuit 330 is connected in parallel with the second filter circuit 320 to form 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 12 b. The second antenna 30 further includes a voltage divider circuit 340. One end of the voltage dividing circuit 340 is electrically connected to the second driving source 310, and the other end of the voltage dividing circuit 340 is electrically connected to a connection point, which is not connected to the second branch 12b, of two connection points formed by the switch circuit 330 and the second filter circuit 320 in parallel. The voltage divider circuit 340 cooperates with the second filter circuit 320 to make the voltage applied across the switch circuit 330 smaller than a predetermined voltage. In the schematic diagram of the present embodiment, the second antenna 30 includes the switch circuit 330 and the voltage divider circuit 340 at the same time as an example, and it can be understood that the second antenna 30 may include the switch circuit 330 alone or the voltage divider circuit 340 alone.

In one embodiment, the voltage divider circuit 340 includes at least one inductor. When the voltage divider circuit 340 includes a plurality of inductors, the plurality of inductors may be connected in series or in parallel, or partially connected in series or partially connected in parallel. The second filter circuit 320 includes an inductor therein. The voltage dividing circuit 340 includes an inductor, and the second filter circuit 320 also includes an inductor, so that the voltage from the second excitation signal is not fully loaded in the switch circuit 330, and the voltage of the second excitation signal is shared by the voltage dividing circuit 340, thereby reducing the voltage loaded across the switch circuit 330, and facilitating to improve the stability of the device of the switch circuit 330.

Referring to fig. 9, fig. 9 is a schematic diagram illustrating simulation of voltages at two ends of a switch circuit when the second antenna includes a voltage divider circuit and does not include the voltage divider circuit according to an embodiment of the present invention, in fig. 9, a horizontal axis represents frequency, a vertical axis represents voltage, and in this schematic diagram, a curve ① represents a schematic diagram illustrating simulation of voltages at two ends of the switch circuit 330 when the voltage divider circuit 340 is not included, a curve ② represents a schematic diagram illustrating simulation of voltages at two ends of the switch circuit 330 when the voltage divider circuit 340 is included, in this schematic diagram, a larger value of the horizontal axis represents a higher voltage at two ends of the switch circuit 330 when the second antenna 30 operates at the same frequency, and it can be seen from this schematic diagram that a voltage value of a curve ① is substantially higher than a voltage value of a curve ②, particularly, a voltage value at a vertex of a curve ① is 73.6V, a vertex of a curve ② (at the same frequency point as a curve ①) has a voltage value of 57.5V, and thus it can be seen that, after the voltage divider circuit 340 is increased, a voltage loaded at two ends of the

Referring to fig. 10, fig. 10 is a schematic view illustrating a first antenna and a second antenna in an electronic device according to another embodiment of the present application. The second slit 1221 is provided corresponding to a non-end portion of the first slit 113, and the first slit 113 and the second slit 1221 further divide the frame 120 into the second branches 12 b. The second antenna 30 further includes 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 configured to adjust the frequency band of the electromagnetic wave signal transmitted and received by the second antenna 30 through the second branch 12 b.

The second branch 12b is also referred to as parasitic branch, and the first adjustable circuit 350 includes an adjustable capacitance.

The second antenna 30 passes through the frequency band of the electromagnetic wave signal that the second branch 12b received and dispatched with the second antenna 30 passes through the frequency band of the electromagnetic wave signal that the first branch 12a received and dispatched is different, can make the second antenna 30 satisfy the requirement of Carrier Aggregation (CA) technique. The CA technology requires the electronic device 1 to have a larger bandwidth, for example, the electronic device 1 is required to support the B1 frequency band and the B41 frequency band, the second antenna 30 can implement the B1 frequency band communication through the first branch 12a, and the second antenna 30 can implement the B41 frequency band communication through the second branch 12B and the first adjustable circuit 350. Therefore, the frame 120 is divided into the second branches 12b in the electronic device 1, the frame 120 in the electronic device 1 is fully utilized, and the requirement of a larger bandwidth is realized in the limited space of the electronic device 1 through the cooperation of the first adjustable circuit 350, so that the requirement of the CA technology can be met.

In this embodiment, the frame 120 includes a first frame 121 and a second frame 122 connected by bending, and the first gap 113 corresponds to the first frame 121 and the second frame 122. The second gap 1221 is formed in the second frame 122, and the second branch 12b includes a portion of the second frame 122 corresponding to the first gap 113 and the second gap 1221.

In the schematic diagram of the present embodiment, the second branch 12b includes a portion of the second frame 122 located above the second gap 1221.

Referring to fig. 11, fig. 11 is a schematic view of a first antenna and a second antenna in an electronic device according to another embodiment of the present application. The electronic device 1 provided in this embodiment is substantially the same as the electronic device 1 provided in fig. 10 and the related description thereof, except that the first gap 113 is disposed corresponding to one of the frames 120, and the second gap 1221 is disposed on the frame 120 corresponding to the first gap 113.

In the schematic diagram of the present embodiment, it is illustrated that the first gap 113 and the second gap 1221 correspond to the short frame 120 of the electronic device 1. It is understood that, in other embodiments, the first gap 113 and the second gap 1221 may also be disposed corresponding to the long frame 120 of the electronic device 1. In this embodiment, the first branch 12a includes a portion of the first frame 121 located at the right side of the second gap 1221 and located below the first gap 113. Accordingly, the second branch 12b includes a portion of the first frame 121 located to the left of the second gap 1221 and located below the first gap 113.

Referring to fig. 12, fig. 12 is a schematic view illustrating a first antenna and a second antenna in an electronic device according to another embodiment of the present application. In this embodiment, the first antenna 20 further comprises a second tunable circuit 230. The first antenna 20 including the second tunable circuit 230 may be incorporated into the electronic device 1 provided in any of the foregoing embodiments, and in the schematic diagram of this embodiment, the first antenna 20 including the second tunable circuit 230 is illustrated as being incorporated into the electronic device 1 in fig. 10. One end of the second adjustable circuit 230 is electrically connected to the first branch 12a, the other end of the second adjustable circuit 230 is grounded, and the second adjustable circuit 230 is used for adjusting the frequency range of the first antenna 20.

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

In one embodiment, the first antenna 20 further includes 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 for matching the output impedance of the first excitation source 210 and the matching degree of the input impedance of the first branch 12 a. The impedance matching circuit 240 matches the output impedance of the first excitation source 210 with the input impedance of the first stub 12a, so that the first excitation signal generated by the first excitation source 210 can be transmitted to the first stub 12a with higher efficiency, and participate in the radiation of the electromagnetic wave signal generating the first frequency band.

Referring to fig. 13, fig. 13 is a schematic view of a first antenna and a second antenna in an electronic device according to another embodiment of the present application. In the schematic diagram of the present embodiment, the second slit 1221 is disposed corresponding to an end of the first slit 113. Specifically, in the present embodiment, the first slit 113 is disposed corresponding to the first frame 121 and the second frame 122. The second slit 1221 is opened on the second frame 122. In this case, the second antenna 30 does not include the second branch 12 b.

Referring to fig. 14, fig. 14 is a schematic view of a first antenna and a second antenna in an electronic device according to another embodiment of the present application. In this embodiment, the first slit 113 is only disposed corresponding to the first frame 121, the second slit 1221 is also disposed on the first frame 121, and the second slit 1221 is also disposed corresponding to an end of the first slit 113. In this case, the second antenna 30 does not include the second branch 12 b.

Referring to fig. 15 together with related drawings such as fig. 1 and fig. 2, fig. 15 is a schematic cross-sectional view of an electronic device along the I-I line according to still another embodiment of the present disclosure. 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 rim 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 disposed opposite to each other. The circuit board 60 and the battery cover 40 are sequentially disposed on one side of the first surface 111. The screen 50 is disposed on one side of the second surface 112. The middle frame body 110 is provided with a first gap 113 communicating the first surface 111 and the second surface 112, the first gap 113 corresponds to at least one frame 120, a part of an appearance surface of the electronic device 1 is formed by a surface of the frame 120 departing from the middle frame body 110, and a second gap 1221 penetrating through the appearance surface is further provided on the frame 120 corresponding to the first gap 113. The second slits 1221 communicate with the first slits 113 to divide the frame 120 into the first branches 12 a. The first branch 12a includes a first feeding point a and a second feeding point B arranged at an interval. The circuit board 60 is electrically connected to the first branch 12a through the first feeding point a, so as to receive and transmit electromagnetic wave signals of a first frequency band through the first branch 12 a. The circuit board 60 is electrically connected to the first branch 12a through the second feeding point B, so as to transmit and receive electromagnetic wave signals of the second frequency band through the first branch 12 a.

The frame 120 with the second gap 1221 is sandwiched between the screen 50 and the battery cover 40. The surface of the frame 120 with the second gap 1221 facing away from the middle frame body 110 forms a part of the appearance of the electronic device 1.

The screen 50 is a member for displaying contents such as characters, images, and video in the electronic device 1. The screen 50 may be a component having only a display function, or may be a component integrating display and touch functions. In this embodiment, the screen 50 further includes a screen body 510 and a cover plate 520 disposed on a side of the screen body 510 away from the middle frame body 110, where the screen body 510 is used for displaying contents of the electronic device 1, such as characters, images, and videos. The cover plate 520 is used for protecting the screen body 510.

The battery cover 40 may be made of non-metallic materials such as glass and ceramic. The battery cover 40 and the screen 50 are disposed on two surfaces of the middle frame body 110 opposite to each other. The two surfaces are two surfaces through which the first slit 113 penetrates.

Compared with the prior art, in the electronic device 1 of the present application, the middle frame 10 is used as the first branch 12a, the first branch 12a is used to form the radiator of the first antenna 20 and the second antenna 30, 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, so as to achieve isolation between the first antenna 20 and the second antenna 30. Therefore, the electronic device 1 of the present application can implement more frequency band coverage in a limited space, implement a larger bandwidth, and have a higher communication performance.

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

In one embodiment, the frequency of the first frequency band is smaller 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 driver 210 electrically connects the first filter circuit 220 to the first feed point a, the second driver 310 electrically connects the second filter circuit 320 to the second feed 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.

Please refer to the related description above for the first excitation source 210, the first filter circuit 220, the second excitation source 310, and the second filter circuit 320, which is not described herein again.

In an embodiment, a switch circuit 330 is further disposed on the circuit board 60, the switch circuit 330 is connected in parallel with the second filter circuit 320, and the switch circuit 330 is configured to adjust a frequency range of the second antenna 30.

In one embodiment, the length of the second feeding point B and the end of the first branch 12a adjacent to the second slot 1221 are: (lambda₂₀/4) ± 5mm, wherein λ₂₀The wavelength is the wavelength corresponding to the central frequency point of the electromagnetic wave signal of the second frequency band.

In one embodiment, the circuit board 60 is further provided with a voltage divider 340. One end of the voltage dividing circuit 340 is electrically connected to the second driving source 310, the other end of the voltage dividing circuit 340 is electrically connected to the second filter circuit 320, and the voltage dividing circuit 340 cooperates with the second filter circuit 320 to make the voltage applied across the switch circuit 330 smaller than a predetermined voltage.

In one embodiment, the voltage divider circuit 340 and the second filter circuit 320 each include an inductor.

In one embodiment, the frequency of the first frequency band is smaller than the frequency of the second frequency band, and the length of the first branch 12a is: (lambda₁₀/4) ± 5mm, wherein λ₁₀The wavelength is the wavelength corresponding to the central frequency point of the electromagnetic wave signal of the first frequency band.

When the length of the first branch 12a is: (lambda₁₀And/4) ± 5mm, so that the length of the first branch 12a is matched with the size of the central frequency point for receiving and transmitting the electromagnetic wave signals of the first frequency band, and the first branch 12a has a better receiving and transmitting effect when receiving and transmitting the electromagnetic wave signals of the first frequency band. It will be appreciated that the first antenna 20 is a quarter wave IFA antenna. Meanwhile, the first antenna 20 can completely cover the low-frequency band of 0.7-0.96 GHz under the adjusting action of the second adjustable circuit.

In one embodiment, the frame 120 includes a first frame 121 and a second frame 122 connected by bending. The first gap 113 corresponds to a portion of the first frame 121 and a portion of the second frame 122. The second slit 1221 is formed in the second frame 122, and the second slit 1221 divides a portion of the second frame 122 corresponding to the first slit 113 into a first portion 12a and a second portion 12b (see fig. 7). The first portion 12a is connected to the first frame 121, the first branch 12a includes the first portion 12a and a portion of the first frame 121 corresponding to the first gap 113, and the second portion 12b forms a second branch 12 b. 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, the first adjustable circuit 350 is configured to adjust a frequency band of an electromagnetic wave signal received and transmitted by the second excitation source 310 through the second branch 12b, and the frequency band of the electromagnetic wave signal received and transmitted by the second excitation source 310 through the first branch 12a is different from the frequency band of the electromagnetic wave signal received and transmitted by the second excitation source 310 through the second branch 12 b.

In one embodiment, the length of the first frame 121 is less than the length of the second frame 122, and the second slit 1221 is opened at an end of the second frame 122 adjacent to the first frame 121.

In this embodiment, when the user holds the electronic device 1 with a hand, the second slot 1221 can be prevented from being held by the user, and thus, the degradation of the communication performance of the first antenna 20 and the second antenna 30 caused by the second slot 1221 being held can be avoided.

Please refer to fig. 16, fig. 16 is a simulation diagram of S-parameters of a first antenna in the electronic device 1 according to an embodiment of the present invention, in the simulation diagram, a horizontal axis represents frequency in GHz, and a vertical axis represents S-parameters in dB, so-called S-parameters are reflection coefficients, which refer to a ratio of energy reflected back from an excitation signal generated by an excitation source in the antenna to total energy of the excitation signal, for the antenna, the lower the S-parameter, the less energy reflected back from the excitation signal generated by the excitation source in the antenna is, and more energy participates in radiation, in the simulation diagram, a curve ① is a simulation curve of S-parameters of a B8_ CH1 sub-band of the first antenna 20 in a B5 band, a curve ② is a simulation curve of S-parameters of a B1 sub-band of the first antenna 20 in a B8 band, in other words, a curve of B-CH 1 sub-band B-CH-8624 curve is smaller than a curve of a simulation curve of a curve of B-8624, a curve of a reflection coefficients of a first antenna-CH-B-8672, a curve of a simulation curve of a frequency band-B-8624, a curve of a frequency band-B-8624, and a curve of a frequency band-B-.

Referring to fig. 17, fig. 17 is a simulation diagram of system efficiency of a first antenna in an electronic device according to an embodiment of the present disclosure, where the system efficiency is equal to radiation efficiency multiplied by reflection coefficient, and the higher the system efficiency, in this diagram, a horizontal axis represents frequency in GHz, and a vertical axis represents system efficiency in dB, a curve ① is a simulation curve of system efficiency of the first antenna 20 in a B28 band, a curve ② is a simulation curve of system efficiency of the first antenna 20 in a B20 band, a curve ③ is a simulation curve of a system efficiency curve of the first antenna 20 in a B5 band, a curve ④ is a simulation curve of a B8_ CH1 sub-band of the first antenna 20 in a B8 band, a curve ⑤ is a simulation curve of a B8_ CH2 sub-band of the first antenna 20 in a B8 band, a curve ⑥ is a simulation curve of a B8_ CH3 sub-band of the first antenna 20 in a B8 band, a curve 68628 is a simulation curve of a B8_ CH3 sub-B869, a simulation curve of a system efficiency curve of the first antenna 20 in a B8 band, a higher B845 band, and a system efficiency curve of the same dB, a system efficiency curve of the first antenna 20 in a higher B828653.

Referring to fig. 18, fig. 18 is a simulation diagram of isolation between a first antenna and a second antenna in an electronic device according to an embodiment of the present disclosure, in the diagram, a horizontal axis represents frequency in GHz, and a vertical axis represents isolation in dB, a curve ① represents energy transmitted by the second antenna 30 to the first antenna 20, and a curve ② represents energy transmitted by the first antenna 20 to the second antenna 30, in the diagram, a curve ① substantially coincides with a curve ②, in the diagram, a smaller number on the vertical axis represents a higher isolation, and a smaller number on the vertical axis represents a higher isolation, from a point 3 in the diagram, the numbers are (0.91734, -19.081), so that most of the isolation between the first antenna 20 and the second antenna 30 is less than-19 dB, that is, the first antenna 20 and the second antenna 30 have better isolation.

Referring to fig. 19, fig. 19 is a simulation diagram of S parameters of a second antenna in an electronic device according to an embodiment of the present disclosure, in the simulation diagram, a horizontal axis represents frequency in GHz, a vertical axis represents S parameters in dB, so-called S parameters are reflection coefficients, and for an antenna, a ratio of energy reflected back from an excitation signal generated by an excitation source in the antenna to total energy of the excitation signal is referred to, the lower the S parameters is, the better the energy reflected back from the excitation signal generated by the excitation source in the antenna is, and more energy participates in radiation, in the simulation diagram, a curve ① is a simulation curve of the S parameters of the second antenna 30 in a B1 band, a curve ② is a simulation curve of the S parameters of the second antenna 30 in a B3 band, a curve ③ is a simulation curve of the S parameters of the second antenna 30 in a B32 band, a curve ④ is a simulation curve of the S parameters of the second antenna 30 in a B40 band, a curve ⑤ is a simulation curve of the S parameters of the B30 in a B3 band, a curve 59645 is a simulation curve of the S parameters of the second antenna 30 in a B32 band, a curve of the second antenna 30 in a second 40 band is a curve, a curve 3648 is a curve of the energy reflected back from the second antenna in a frequency band, a second antenna 30, a second frequency band is smaller energy reflected back from a second energy of a second antenna in a second frequency band, a communication band B638 band, a communication band, a curve of a communication band, a curve 3, a curve.

Referring to fig. 20, fig. 20 is a simulation diagram of system efficiency of a second antenna in an electronic device according to an embodiment of the present disclosure, where the system efficiency is equal to radiation efficiency multiplied by reflection coefficient, and the higher the system efficiency, in this diagram, a horizontal axis represents frequency, in GHz, and a vertical axis represents system efficiency, in dB, a curve ① is a simulation curve of system efficiency of the second antenna 30 in a B3 frequency band, a curve ② is a simulation curve of system efficiency of the second antenna 30 in a B1 frequency band, a curve ③ is a simulation curve of system efficiency of the second antenna 30 in a B32 frequency band, a curve ④ is a simulation curve of system efficiency of the second antenna 30 in a B40 frequency band, a curve ⑤ is a simulation curve of system efficiency of the second antenna 30 in a B41 frequency band, in this simulation diagram, a curve ① is taken as an example, system efficiency of a B3 frequency band is about-4 dB, and thus it can be seen that the second antenna 30 has higher system efficiency in a B3 frequency band as well as a B399685, a system efficiency in a B41 frequency band.

Referring to fig. 21, fig. 21 is a schematic diagram illustrating simulation of an S parameter when a second antenna in an electronic device includes a second branch according to an embodiment of the present application. In the simulation diagram, the horizontal axis represents frequency in GHz and the vertical axis represents S-parameter in dB. The S parameter is a reflection coefficient, and for an antenna, it refers to a ratio of energy reflected from an excitation signal generated by an excitation source in the antenna to total energy of the excitation signal. The lower the S parameter is, the better, at this time, the less energy is reflected by the excitation signal generated by the excitation source in the antenna, and more energy participates in radiation. In the simulation diagram, the S parameters of the second antenna 30 in the frequency band of 1.71GHz-2.69GHz are all less than-2 dB, i.e., the S parameters of the second antenna 30 in the frequency band of 1.71GHz-2.69GHz are relatively small. Therefore, the second antenna 30 covers a wider frequency band and also considers the S parameter, so that the electronic device 1 of the present application has a larger bandwidth and better communication quality in the second frequency band in which the second antenna 30 operates.

Referring to fig. 22, fig. 22 is a schematic diagram illustrating simulation of system efficiency when a second antenna in an electronic device includes a second branch, where in the schematic diagram, a horizontal axis represents frequency, a unit is GHz, a vertical axis represents system efficiency, and a unit is dB, and the higher a value of the system efficiency is, the better a curve ① is a simulation curve of the system efficiency when the second antenna 30 includes the second branch 12B, a point 1 is the system efficiency of the lowest frequency point of the second antenna 30 in a B3 frequency band, a point 2 is the system efficiency of the highest point of the second antenna 30 in a B41 frequency band, and a frequency band corresponding to the second antenna 30 including the second branch 12B is located between the point 1 and the point 2, and both the system efficiencies are greater than or equal to-7.3 dB, and the system efficiency is higher.

As can be seen from the above simulation diagrams, the first antenna 20 and the second antenna 30 have better isolation, and both the first antenna 20 and the second antenna 30 have smaller S parameters and higher system efficiency, so that the electronic device 1 of the present application has better communication effect.

It should be understood that, although the electronic device 1 includes the middle frame 10 in the foregoing embodiments of the present application, the first antenna 20 and the second antenna 30 are formed on the middle frame 10 for illustration. However, the above embodiments should not be construed as limiting the present application, and the first branch 12a and the second branch 12b of the first antenna 20 and the second antenna 30 may be formed on other components, for example, when the electronic device 1 includes a conductive battery cover 40 (e.g., a metal battery cover), the first branch 12a and the second branch 12b of the first antenna 20 and the second antenna 30 may be formed on the battery cover 40. The electrically conductive battery cover 40 and the middle frame 10 are only one specific form of the housing of the electronic device 1. Of course, the housing is not limited to the battery cover 40 and the middle frame 10, which are electrically conductive 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.

When the housing formed by the first branch 12a and the second branch 12b of the first antenna 20 and the second antenna 30 is the conductive battery cover 40 in the electronic device 1, the same situation as that the housing formed by the first branch 12a and the second branch 12b of the first antenna 20 and the second antenna 30 is the middle frame 10 is adopted. Referring to fig. 23-25, specifically, please refer to fig. 23, 24 and 25 together, fig. 23 is a schematic back view of an electronic device according to an embodiment of the present disclosure; FIG. 24 is a schematic view of a battery cover from an inner surface of an electronic device according to the present application; fig. 25 is a schematic sectional view taken along line II-II in fig. 23. The housing 70 includes a body 710 and a frame 720 connected to a periphery of the body 710, wherein a first gap 113 penetrating through two opposite surfaces of the body 710 is formed at the periphery of the body 710, at least a portion of the frame 720 is isolated from the body 710 by the first gap 113, and a second gap 1221 communicating with the first gap 113 is formed on the frame 720.

Compared with the prior art, in the electronic device 1 of the present application, the housing 70 is used to form the first branch 12a, the first branch 12a is used to form the radiator of the first antenna 20 and the second antenna 30, 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, so as to achieve isolation between the first antenna 20 and the second antenna 30. Therefore, the electronic device 1 of the present application can implement more frequency band coverage in a limited space, implement a larger bandwidth, and have a higher communication performance.

When the housing 70 is the battery cover 40 capable of conducting electricity, the housing 70 forms an accommodating space for accommodating the middle frame 10, the circuit board 60 and the screen 50. The circuit board 60 is disposed on a side of the middle frame 10 facing the battery cover 40, and the screen 50 is disposed on a 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.

It is understood that when the housing 70 is the battery cover 40 capable of conducting electricity, various circuits and sub-circuits when the housing 70 is the middle frame 10 are also included in the electronic device 1. For each circuit, please refer to the above description, which is not repeated herein. When the housing 70 is the conductive battery cover 40, the relationship between the first gap 113 and the second gap 1221 as compared with other parts of the housing 70 is the same as that in the embodiment when the housing 70 is the middle frame 10, and therefore, the description thereof is omitted.

It can be understood that, in the background art embodiment of the present application, the first antenna 20 operates in a first frequency band, and the size of the first frequency band is: f1 is greater than or equal to 0.7GHz and less than or equal to 0.96GHz, and the second antenna 30 is operated in a second frequency band, wherein the second frequency band has the following sizes: for example, 1.45GHz ≦ f2 ≦ 2.69GHz is given as an example, the above description of the first antenna 20 and the second antenna 30 should not be construed as limiting the first antenna 20 and the second antenna 30 in the present application, and in other embodiments, the first antenna 20 and the second antenna 30 may also be antennas supporting other frequency bands.

Although embodiments of the present application have been shown and described, it is understood that the above embodiments are illustrative and not restrictive, and that those skilled in the art may make changes, modifications, substitutions and alterations to the above embodiments without departing from the scope of the present application, and that such changes and modifications are also to be considered as within the scope of the present application.

Claims

1. An electronic device, comprising:

2. The electronic device of claim 1, wherein the electronic device further comprises:

and the switching circuit is connected with the second filter circuit in parallel and is used for adjusting the frequency range of the second antenna.

3. The electronic device of claim 2, wherein the second excitation source is electrically connected to the second electrodeThe length of the feed point of one branch and the first branch at one end of the first branch adjacent to the second gap are as follows: (lambda₂₀/4) ± 5mm, wherein λ₂₀The wavelength is the wavelength corresponding to the central frequency point of the electromagnetic wave signal of the second frequency band.

4. The electronic device of claim 3, wherein the second antenna further comprises:

one end of the voltage division circuit is electrically connected to the second excitation source, the other end of the voltage division circuit is electrically connected to a connection point which is not connected with the second branch in two connection points formed by the second filter circuit and the switch circuit in parallel, and the voltage division circuit is matched with the second filter circuit to enable the voltage loaded at the two ends of the switch circuit to be smaller than a preset voltage.

5. The electronic device of claim 2, wherein the switch circuit comprises a switch and a plurality of adjusting sub-circuits, and when at least one or more of the plurality of adjusting sub-circuits are electrically connected to the first stub through the switch, the plurality of adjusting sub-circuits are configured to adjust a frequency band range of the second antenna.

6. The electronic device of claim 1, wherein the second slot is disposed at a non-end portion of the first slot, the first slot and the second slot further divide the frame into second branches, the second antenna further comprises a first tunable circuit, one end of the first tunable circuit is electrically connected to the second branches, the other end of the first tunable circuit is grounded, a frequency band of the electromagnetic wave signals received and transmitted by the second antenna through the second branches is different from a frequency band of the electromagnetic wave signals received and transmitted by the second antenna through the first branches, and the first tunable circuit is configured to adjust a frequency band of the electromagnetic wave signals received and transmitted by the second antenna through the second branches.

7. The electronic device of claim 6, wherein the frame comprises a first frame and a second frame that are connected by bending, the first gap corresponds to the first frame and the second frame, the second gap is formed on the second frame, and the second branch comprises a portion of the second frame corresponding to the first gap and the second gap.

8. The electronic device according to claim 6, wherein the number of the frames is at least one, the first slot is disposed corresponding to one of the frames, and the second slot is disposed on the frame corresponding to the first slot.

9. The electronic device of claim 1, wherein the first antenna further comprises a second tunable circuit, one end of the second tunable circuit is electrically connected to the first stub, the other end of the second tunable circuit is grounded, and the second tunable circuit is configured to adjust a frequency band range of the first antenna.

10. The electronic device according to claim 1, wherein the first antenna further includes an impedance matching circuit, one end of the impedance matching circuit is electrically connected to a first excitation source, the other end of the impedance matching circuit is electrically connected to the first filter circuit, and the impedance matching circuit is configured to match an output impedance of the first excitation source and a matching degree of an input impedance of the first stub.

11. The electronic device according to claim 1, wherein the second slit is provided corresponding to an end of the first slit.

12. An electronic device, characterized in that, the electronic device includes a housing and a circuit board, the housing includes a body and a frame connected to the periphery of the body, the periphery of the body is provided with a first gap penetrating through two opposite surfaces of the body, the first gap isolates at least a part of the frame from the body, the frame is provided with a second gap communicated with the first gap, the first gap and the second gap divide the frame into first branches, the first branches have a first feeding point and a second feeding point arranged at intervals, the circuit board includes a first excitation source, a second excitation source, a first filter circuit and a second filter circuit, the first excitation source is electrically connected with the first feeding point, the second excitation source is electrically connected with the second feeding point, the first filter circuit is used for filtering a first antenna of the first excitation source from a second antenna of the second excitation source And the second filter circuit is used for filtering the interference of the first antenna where the first excitation source is positioned to the second antenna where the second excitation source is positioned.

13. The electronic device of claim 12, wherein the first antenna resonates at a first frequency band, the second antenna resonates at a second frequency band, a frequency of the first frequency band is less than a frequency of the second frequency band, the second feed point is adjacent to the second slot compared to the first feed point, the first filter circuit is a low pass filter circuit, and the second filter circuit is a band stop filter circuit.

14. The electronic device according to claim 13, wherein a switch circuit is further disposed on the circuit board, and the switch circuit is connected in parallel with the second filter circuit, and is configured to adjust a frequency band range of the second antenna.

15. The electronic device of claim 14, wherein the second feed point and an end of the first stub adjacent to the second slot have length dimensions of: (lambda₂₀/4) ± 5mm, wherein λ₂₀The wavelength is the wavelength corresponding to the central frequency point of the electromagnetic wave signal of the second frequency band.

16. The electronic device of claim 15, wherein the circuit board further comprises a voltage divider circuit, one end of the voltage divider circuit is electrically connected to the second excitation source, the other end of the voltage divider circuit is electrically connected to the second filter circuit, and the voltage divider circuit and the second filter circuit cooperate to make the voltage applied across the switch circuit smaller than a predetermined voltage.

17. The electronic device of claim 16, wherein the voltage divider circuit and the second filter circuit each comprise an inductor.

18. The electronic device of claim 12, wherein the frequency of the first frequency band is less than the frequency of the second frequency band, and the length of the first stub is: (lambda₁₀/4) ± 5mm, wherein λ₁₀The first branch section is excited by the first excitation source to resonate in a first frequency band as a first antenna of a radiator, and the second branch section is excited by the second excitation source to resonate in a second frequency band as a second antenna of the radiator.

19. The electronic device according to claim 12, wherein the frame comprises a first frame and a second frame connected by bending, the first gap corresponds to a portion of the first frame and a portion of the second frame, the second gap is formed on the second frame, the second gap divides a portion of the second frame corresponding to the first gap into a first portion and a second portion, wherein the first portion is connected to the first frame, the first stub comprises a first portion and a portion of the first frame corresponding to the first gap, the second portion forms a second stub, the circuit board further comprises a first adjustable circuit electrically connected to the second stub, the first adjustable circuit is configured to adjust a frequency band of the electromagnetic wave signal transmitted and received by the second excitation source through the second stub, and the frequency band of the electromagnetic wave signals received and transmitted by the second excitation source through the first branch is different from the frequency band of the electromagnetic wave signals received and transmitted by the second excitation source through the second branch.

20. The electronic device of claim 19, wherein a length of the first bezel is less than a length of the second bezel, and the second slot is opened at an end of the second bezel adjacent to the first bezel.