Electronic device

Abstract

The embodiment of the present application provides an electronic device, which comprises a ground plate, a first feed source, a first radiation branch and a second radiation branch. The ground plate comprises a first side which is a long side and a second side which is a short side. The first radiation branch is arranged adjacent to and parallel to the first side and comprises a first feed point and a first ground point. The first feed point is connected with the first feed source, and the first ground point is connected with the first side. The first radiation branch works under the excitation of the first feed source and excites a first ground plate mode of the ground plate, thereby supporting a first low-frequency frequency band together. The second radiation branch is adjacent to and spaced from the first radiation branch and is arranged adjacent to and parallel to the second side. The second radiation branch comprises a second ground point arranged at one end of the second radiation branch close to the first radiation branch and connected with the second side. The second radiation branch works under the coupling excitation of the first feed source and excites a second ground plate mode of the ground plate, thereby supporting a second low-frequency frequency band together. The present application can effectively improve the performance of the antenna.

Description

TECHNICAL FIELD

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

[0002] At present, with the popularization of 5G communication technology, people's communication experience is also getting better and better. With the popularization of full-screen and curved screen, the net space left for the antenna is getting smaller and smaller. In particular, for low-frequency antennas, the required size is often large. With the increase of various antennas, large-size low-frequency antennas often compress the space of other antennas, causing impact on other antennas. In some cases, either the size of the low-frequency antenna needs to be reduced, or it has to be laid out in a position with less net space, which causes the radiation performance of the low-frequency antenna to be affected to a certain extent, resulting in poor communication experience in the low-frequency band. SUMMARY

[0003] The present application provides an electronic device to solve the above problems.

[0004] In a first aspect, an electronic device is provided, which includes a ground plate, a first feed source, a first radiating branch and a second radiating branch. The ground plate includes a first side and a second side connected to the first side, wherein the ground plate is rectangular, the first side is a long side, and the second side is a short side. The first radiating branch is arranged adjacent to and parallel to the first side, and includes a first feed point and a first ground point. The first feed point is connected to the first feed source, and the first ground point is connected to the first side. The first radiating branch is used to work under the excitation of the first feed source, and is used to excite a first plate mode of the ground plate, thereby supporting the transmission and reception of electromagnetic wave signals in a first low-frequency band. The second radiating branch is arranged adjacent to and spaced apart from the first radiating branch, and is arranged adjacent to the second side and parallel to the first side. The second radiating branch includes a second ground point arranged at one end of the second radiating branch close to the first radiating branch and connected to the second side. The second radiating branch is coupled to the first radiating branch, and is used to work under the coupled excitation of the first feed source, and is used to excite a second plate mode of the ground plate, thereby supporting the transmission and reception of electromagnetic wave signals in a second low-frequency band.

[0005] The electronic device of the present application can support the transmission and reception of electromagnetic wave signals of two low-frequency frequency bands respectively through two radiation branches and a ground plate, effectively improving the bandwidth and the antenna radiation performance. In addition, the first ground plate mode of the ground plate 1 is excited by the first radiation branch to support the transmission and reception of electromagnetic wave signals of the first low-frequency frequency band, and the second ground plate mode of the ground plate is excited by the second radiation branch to support the transmission and reception of electromagnetic wave signals of the second low-frequency frequency band. Even if the first radiation branch and the second radiation branch are in a small clearance environment, i.e. in an environment with little clearance around, the antenna radiation performance of the first low-frequency frequency band and the second low-frequency frequency band can be effectively ensured by the ground plate 1. In addition, in the present application, the second grounding point is arranged at one end of the second radiation branch close to the first radiation branch, which can more effectively conduct the coupled energy to the ground plate and more effectively excite the second ground plate mode of the ground plate, effectively improving the antenna radiation performance. In addition, since the second radiation branch is excited by coupling, only one feed source and one feed point are needed to realize the coverage of two low-frequency frequency bands, effectively reducing the number of feed elements such as feed tabs and riveted copper columns, and saving costs. BRIEF DESCRIPTION OF DRAWINGS

[0006] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the background art, the drawings needed to be used in the embodiments of the present application or the background art will be described below.

[0007] Figure 1 It is a simple structure diagram of the electronic device in an embodiment of the present application.

[0008] Figure 2 It is a simple diagram of current distribution of the ground plate of the electronic device in some embodiments of the present application in the first ground plate mode.

[0009] Figure 3 It is a simple diagram of current distribution of the ground plate of the electronic device in some embodiments of the present application in the second ground plate mode.

[0010] Figure 4 It is another simple structure diagram of the electronic device in some embodiments of the present application.

[0011] Figure 5 It is an antenna radiation pattern of the electronic device working in the first low-frequency frequency band in some embodiments of the present application.

[0012] Figure 6 It is an antenna radiation pattern of the electronic device working in the second low-frequency frequency band in some embodiments of the present application.

[0013] Figure 7A schematic diagram of the system total efficiency of an electronic device in some embodiments of the application compared to a reference electronic device.

[0014] Figure 8 A schematic diagram of a further simple structure of an electronic device in some embodiments of the application.

[0015] Figure 9 A plan view schematic diagram of part of the internal structure of an electronic device in some embodiments of the application.

[0016] Figure 10 A back view schematic diagram of an electronic device in some embodiments of the application.

[0017] Figure 11 A further plan view schematic diagram of part of the internal structure of an electronic device in some embodiments of the application. DETAILED DESCRIPTION

[0018] The technical solutions in the embodiments of the application will be clearly and completely described below with reference to the drawings in the embodiments of the application. Obviously, the described embodiments are only some of the embodiments of the application, but not all the embodiments of the application. Based on the embodiments of the application, all other embodiments obtained by a person of ordinary skill in the art without creative effort are within the protection scope of the application.

[0019] In the description of the embodiments of the application, it should be understood that the terms "upper", "lower", "thickness", "width" and the like indicate the positional or location relationship shown in the drawings, and are only for the purpose of facilitating the description of the application and simplifying the description, and do not imply or indicate that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the application. The term "connection" in the present application includes direct connection, indirect connection and electrical connection and the like.

[0020] Please refer to Figure 1 A schematic diagram of a simple structure of an electronic device 100 in an embodiment of the application. As shown in FIG. 1, the electronic device 100 includes a display 110, a processor 120, a memory 130, a communication interface 140, a power supply 150 and a battery 160. Figure 1As shown, the electronic device 100 comprises a ground plate 1, a first feed source 2, a first radiation branch 3 and a second radiation branch 4. The ground plate 1 comprises a first side B1 and a second side B2 connected with the first side B1, wherein the ground plate 1 is rectangular, the first side B1 is the long side of the ground plate 1, and the second side B2 is the short side of the ground plate 1. The first radiation branch 3 is arranged adjacent to and parallel with the first side B1, and comprises a first feeding point F1 and a first grounding point G1, wherein the first feeding point F1 is connected with the first feed source 2, and the first grounding point G1 is connected with the first side B1. The first radiation branch 3 is used to work under the excitation of the first feed source 2, and is used to excite a first ground plate mode of the ground plate 1, and to support the transmission and reception of electromagnetic wave signals in a first low frequency band. The second radiation branch 4 is arranged adjacent to and spaced apart from the first radiation branch 3, and is arranged adjacent to and parallel with the second side B2. The second radiation branch 4 comprises a second grounding point G2 arranged at one end of the second radiation branch 4 close to the first radiation branch 3 and connected with the second side B2. The second radiation branch 4 is coupled with the first radiation branch 3, and is used to work under the coupled excitation of the first feed source 2, and to excite a second ground plate mode of the ground plate 1, and to support the transmission and reception of electromagnetic wave signals in a second low frequency band.

[0021] Therefore, in the present application, the transmission and reception of electromagnetic wave signals in two low frequency bands can be supported by the two radiation branches cooperating with the ground plate 1, which can effectively improve the frequency bandwidth and the antenna radiation performance. In addition, the transmission and reception of electromagnetic wave signals in the first low frequency band are supported by the first radiation branch 3 exciting the first ground plate mode of the ground plate 1, and the transmission and reception of electromagnetic wave signals in the second low frequency band are supported by the second radiation branch 4 exciting the second ground plate mode of the ground plate 1. Even if the first radiation branch 3 and the second radiation branch 4 are in a small clearance environment, i.e. in an environment with little surrounding clearance, the antenna radiation performance in the first low frequency band and the second low frequency band can be effectively ensured by the ground plate 1.

[0022] In addition, in the present application, the second grounding point G2 is arranged at one end of the second radiation branch 4 close to the first radiation branch 3, which can more effectively conduct the coupled energy to the ground plate 1, and more effectively excite the second ground plate mode of the ground plate 1, thereby effectively improving the antenna radiation performance. In addition, since the second radiation branch 4 is excited by coupling, only one feed source and one feeding point are needed to realize the coverage of two low frequency bands, thereby effectively reducing the number of feeding elements such as feeding tabs and riveted copper columns, and saving costs.

[0023] As shown in Figure 1 the first radiating branch 3 includes a first free end 31 and a first ground end 32, the second radiating branch 4 includes a second ground end 41 and a second free end 42, the first free end 31 of the first radiating branch 3 is adjacent to and spaced from the second ground end 41 of the second radiating branch 4, and the first free end 31 is an open end, the first ground point G1 is arranged at the first ground end 32 of the first radiating branch 3, and the first feed point F1 is located between the first free end 31 and the first ground end 32; the second ground point G2 is arranged at the second ground end 41 of the second radiating branch 4, and the second free end 42 is an open end.

[0024] That is, in some embodiments, the first radiating branch 3 is arranged adjacent to the second radiating branch 4, specifically the first free end 31 of the first radiating branch 3 is arranged adjacent to the second ground end 41 of the second radiating branch 4. The first ground point G1 is arranged at the first ground end 32 of the first radiating branch 3, and the second ground point G2 is arranged at the second ground end 41 of the second radiating branch 4, that is, at the end of the second radiating branch 4 close to the first radiating branch 3.

[0025] In this application, the first ground point G1 arranged at the first ground end 32 of the first radiating branch 3 can include the first ground point G1 arranged at a position close to the first ground end 32 of the first radiating branch 3, and the first ground point G1 completely located at the position of the first ground end 32. The second ground point G2 arranged at the second ground end 41 of the second radiating branch 4 can also include the second ground point G2 arranged at a position close to the second ground end 41 of the second radiating branch 4, and the second ground point G1 completely located at the position of the second ground end 41.

[0026] As shown in Figure 1 In some embodiments, the second ground point G2 of the second radiating branch 4 is connected to a target position of the second side B2, and the target position is an end of the second side B2 connected to the first side B1.

[0027] That is, in some embodiments, the second ground point G2 of the second radiating branch 4 is specifically connected to a top corner of the second side B2 and the first side B1 connected to the second ground plate 1.

[0028] In this way, by connecting the second ground point G2 of the second radiating branch 4 to the top corner of the second ground plate 1, the second ground plate mode can be more fully excited, and the antenna radiation performance in the second low-frequency frequency band is better.

[0029] In some embodiments, the first radiating branch 3 has an electrical length of λ1 / 4, where λ1 is the wavelength corresponding to the first low frequency band, and the first radiating branch 3 resonates in the first low frequency band under the excitation of the first feed source 2, while the first radiating branch 3 does not excite the ground plate 1 to generate a current along the first target direction, so that the ground plate 1 resonates in the first low frequency band and supports the transmission and reception of electromagnetic wave signals in the first low frequency band. The first target direction is perpendicular to the first side B1. When the ground plate 1 generates a current along the first target direction perpendicular to the first side B1, the ground plate 1 is in the first ground plate mode and can also act as a radiating branch.

[0030] Please refer to Figure 2 for the current distribution of the ground plate 1 of the electronic device in the first ground plate mode.

[0031] Generally, the ground point is a strong current point, so that the first radiating branch 3 forms a current large point at the first ground point G1 under the excitation of the first feed source 2, that is, the point with the maximum current on the first radiating branch 3 under the excitation of the first feed source 2 is generally the first ground point G1. Therefore, by connecting the first ground point G1 and the first side B1 of the ground plate 1, the ground plate 1 can be effectively excited to generate a current I1 along the first target direction perpendicular to the first side B1. As described above, when the ground plate 1 generates a current along the first target direction perpendicular to the first side B1, the ground plate 1 is in the first ground plate mode and can also act as a radiating branch.

[0032] In some embodiments, the dimension of the ground plate 1 along the first target direction is substantially equal to the electrical length of the ground plate 1 along the first target direction, and is substantially equal to nλ 1+ λ1 / 4, where n is 0 or a positive integer. Therefore, the ground plate 1 can resonate in the first low frequency band.

[0033] Therefore, since the first radiating branch 3 and the ground plate 1 can both resonate in the first low frequency band, they can both support the transmission and reception of electromagnetic wave signals in the first low frequency band. Even if the first radiating branch 3 is located in a small clearance environment, the ground plate 1 can still effectively support the transmission and reception of electromagnetic wave signals in the first low frequency band, so that the final electromagnetic wave signal in the first low frequency band still has high radiation performance.

[0034] In some embodiments, the first radiating branch 3 has an electrical length of λ1 / 4, where λ1 is the wavelength corresponding to the first low frequency band, and the first radiating branch 3 resonates in the first low frequency band under the excitation of the first feed source 2, while the first radiating branch 3 does not excite the ground plate 1 to generate a current along the first target direction, so that the ground plate 1 resonates in the first low frequency band and supports the transmission and reception of electromagnetic wave signals in the first low frequency band. The first target direction is perpendicular to the first side B1. When the ground plate 1 generates a current along the first target direction perpendicular to the first side B1, the ground plate 1 is in the first ground plate mode and can also act as a radiating branch. Figure 2As shown, the first target direction is specifically a direction perpendicular to the first edge B1 and away from the first edge B1, that is, the current I1 generated by the ground plate 1 along the first target direction is specifically from the first edge B1 to a direction away from the first edge B1, and is generally perpendicular to the first edge B1.

[0035] In some embodiments, the second radiation branch 4 has an electrical length of λ2 / 4, where λ2 is a wavelength corresponding to the second low-frequency frequency band, the second radiation branch 4 resonates in the second low-frequency frequency band under the coupling excitation of the first feed source 2, at the same time, the second radiation branch 4 does not excite the ground plate 1 to generate a current along the second target direction, so that the ground plate 1 resonates in the second low-frequency frequency band at the same time, and supports the transmission and reception of electromagnetic wave signals in the second low-frequency frequency band together; wherein the second target direction is a direction perpendicular to the second edge. Wherein, when the ground plate 1 generates a current along the second target direction perpendicular to the second edge B2, it is excited in the second ground plate mode, and the ground plate 1 can also act as a radiation branch.

[0036] Please refer to Figure 3 for the current distribution of the ground plate 1 of the electronic device in the second ground plate mode.

[0037] Wherein, as described above, generally, the ground point is a large current point, so that under the coupling excitation of the first feed source 2, the second radiation branch 4 will form a large current point at the second ground point G1, that is, under the coupling excitation of the first feed source 2, the point with the maximum current on the second radiation branch 4 is generally the second ground point G2. Therefore, by connecting the second ground point G2 and the second edge B2 of the ground plate 1, the ground plate 1 can be effectively excited to generate a current I2 along the second target direction perpendicular to the second edge B2. As described above, when the ground plate 1 generates a current I2 along the second target direction perpendicular to the second edge B2, it is excited in the second ground plate mode, and the ground plate 1 can also act as a radiation branch.

[0038] In some embodiments, the size of the ground plate 1 along the second target direction can be generally equal to the electrical length of the ground plate 1 along the second target direction, and can be generally equal to nλ 2+ λ2 / 4, where n is 0 or a positive integer. Therefore, the ground plate 1 can resonate in the second low-frequency frequency band at the same time.

[0039] Therefore, since the second radiation branch 4 and the ground plate 1 can both resonate in the second low-frequency frequency band, it means that both can support the transceiving of electromagnetic wave signals in the first low-frequency frequency band. Even if the second radiation branch 4 is located in a small clearance environment, the ground plate 1 can effectively support the transceiving of electromagnetic wave signals in the second low-frequency frequency band, so that the final second low-frequency frequency band electromagnetic wave signal radiation performance is still high.

[0040] In particular, as mentioned above, when the second ground point G2 of the second radiation branch 4 is connected to the top corner of the ground plate 1, the second ground plate mode can be more fully excited, so that at this time, even if the radiation performance of the second radiation branch 4 is poor, the final second low-frequency frequency band antenna radiation performance can still be maintained at a relatively high level.

[0041] As shown in Figure 3 , the second target direction is specifically a direction perpendicular to and away from the second side B2, that is, the current I2 generated by the ground plate 1 along the second target direction is specifically from the second side B2 to a direction away from the second side B2, and is substantially perpendicular to the second side B2.

[0042] Please refer to Figure 4 , another simple structure schematic diagram of an electronic device 100 in some embodiments of the present application. As shown in Figure 4 , in some embodiments, the electronic device 100 further includes a matching element M1, and the second ground point G2 of the second radiation branch 4 is connected to the second side B2 through the matching element M1. The equivalent electrical length of the second radiation branch 4 under the cooperation of the matching element M1 is λ2 / 4, wherein λ2 is the wavelength corresponding to the second low-frequency frequency band. The second radiation branch 4 resonates in the second low-frequency frequency band under the coupling excitation of the first feed 2. At the same time, the second radiation branch 4 does not excite the ground plate 1 to generate a current along the second target direction, so that the ground plate 1 also resonates in the second low-frequency frequency band, and together supports the transceiving of electromagnetic wave signals in the second low-frequency frequency band; wherein the second target direction is a direction perpendicular to the second side B2.

[0043] When the second ground point G2 of the second radiating branch 4 is connected with the second side B2 through the matching element M1, the matching element M1 will affect the electrical length, so that only the equivalent electrical length of the second radiating branch 4 under the cooperation of the matching element M1 is λ2 / 4, the second radiating branch 4 can still resonate in the second low-frequency frequency band under the coupling excitation of the first feed source 2. Therefore, the electrical length of the second radiating branch 4 can be significantly smaller than λ2 / 4. Generally, the electrical length of the radiating branch is positively correlated with the size of the radiating branch. At this time, the size of the second radiating branch 4 can also be relatively small. For example, the size of the second radiating branch 4 can be only 1 / 2, 1 / 3, etc. of the size of the first radiating branch 3, so that the size of the second radiating branch 4 can be effectively reduced, thereby effectively reducing the space occupation of the electronic device 100.

[0044] In some embodiments, the matching element M1 can be an inductor. In some embodiments, when the size of the second radiating branch 4 needs to be very small, the matching element M1 can be an inductor with a large inductance value, for example, an inductor with a value of mH (millihenry) or more, which can equivalent to a longer electrical length. The matching element M1 can be a single inductor or a plurality of series-connected inductors.

[0045] In some embodiments, the first feed source 2 is configured to output a first feed signal and a second feed signal. The first feed signal corresponds to the first low-frequency frequency band, and the second feed signal corresponds to the second low-frequency frequency band. The first feed signal and the second feed signal output by the first feed source 2 are fed into the first radiating branch 3 through the first feed point F1. The first radiating branch 3 is specifically configured to work under the excitation of the first feed signal output by the first feed source 2, support the transmission and reception of electromagnetic wave signals in the first low-frequency frequency band, and further excite the ground plate 1 to work in the first ground plate mode. The second feed signal output by the first feed source 2 is coupled into the second radiating branch 4 through the first radiating branch 3, and excites the second radiating branch 4, so that the second radiating branch 4 supports the transmission and reception of electromagnetic wave signals in the second low-frequency frequency band, and further excites the ground plate 1 to work in the second ground plate mode.

[0046] The first feed source 2 can be a radio frequency front-end circuit (not shown in the figure) that obtains a feed signal source by mixing the first feed signal and the second feed signal through a combiner (not shown in the figure).

[0047] In some embodiments, the ground plate 1 is configured to provide a ground potential, and the first ground point G1 of the first radiating branch 3 is connected to the first side B1 of the ground plate 1. Figure 1 and Figure 4 In some embodiments, the ground plate 1 is configured to provide a ground potential, and the first ground point G1 of the first radiating branch 3 is connected to the first side B1 of the ground plate 1. Figure 1 and Figure 4 In some embodiments, the ground plate 1 is configured to provide a ground potential, and the first ground point G1 of the first radiating branch 3 is connected to the first side B1 of the ground plate 1.

[0048] In some embodiments, the first target direction is parallel to the second side B2, and the second target direction is parallel to the first side B1.

[0049] In some embodiments, the first low-frequency band is higher than the second low-frequency band, or the first low-frequency band is lower than the second low-frequency band.

[0050] In some embodiments, the first low-frequency band is higher than the second low-frequency band, i.e., the minimum value of the frequency range corresponding to the first low-frequency band is greater than the minimum value of the frequency range corresponding to the second low-frequency band, and the maximum value of the frequency range corresponding to the first low-frequency band is greater than the maximum value of the frequency range corresponding to the second low-frequency band. In some embodiments, the frequency range corresponding to the first low-frequency band and the frequency range corresponding to the second low-frequency band can partially overlap or completely not overlap.

[0051] In some embodiments, the first low-frequency band is higher than the second low-frequency band, i.e., the minimum value of the frequency range corresponding to the first low-frequency band is greater than the minimum value of the frequency range corresponding to the second low-frequency band, and the maximum value of the frequency range corresponding to the first low-frequency band is greater than the maximum value of the frequency range corresponding to the second low-frequency band. In some embodiments, the frequency range corresponding to the first low-frequency band and the frequency range corresponding to the second low-frequency band can partially overlap or completely not overlap.

[0052] In some embodiments, the first low-frequency band is higher than the second low-frequency band, i.e., the minimum value of the frequency range corresponding to the first low-frequency band is greater than the minimum value of the frequency range corresponding to the second low-frequency band, and the maximum value of the frequency range corresponding to the first low-frequency band is greater than the maximum value of the frequency range corresponding to the second low-frequency band. In some embodiments, the frequency range corresponding to the first low-frequency band and the frequency range corresponding to the second low-frequency band can partially overlap or completely not overlap.

[0053] In some embodiments, the first low frequency band can be B20 band, and the corresponding frequency range is approximately 796-865MHz. The second low frequency band can be B28 band (also called N28 band when it is a 5G communication band), and the corresponding frequency range is approximately 700-800MHz. Obviously, in other embodiments, the first low frequency band and the second low frequency band can be other low frequency bands.

[0054] In some embodiments, the first low frequency band can also be lower than the second low frequency band, or higher than the second low frequency band, i.e., the minimum value of the frequency range corresponding to the first low frequency band is less than the minimum value of the frequency range corresponding to the second low frequency band, and the maximum value of the frequency range corresponding to the first low frequency band is less than the maximum value of the frequency range corresponding to the second low frequency band. In some embodiments, as shown in FIG. 1, the first low frequency band is B20 band, and the corresponding frequency range is approximately 796-865MHz. The second low frequency band is B28 band, and the corresponding frequency range is approximately 700-800MHz. Figures 1-4 As shown in FIG. 1, the first radiation branch 3 and the second radiation branch 4 are long strips, the first radiation branch 3 is parallel to the first side B1, and the second radiation branch 4 is parallel to the second side B2.

[0055] The first radiation branch 3 is parallel to the first side B1, and the second radiation branch 4 is parallel to the second side B2, specifically, the length direction of the first radiation branch 3 is parallel to the extension direction of the first side B1, and the length direction of the second radiation branch 4 is parallel to the extension direction of the second side B2. Wherein, the length direction of the first radiation branch 3 and the second radiation branch 4 is the extension direction of the longest side of the first radiation branch 3 and the second radiation branch 4.

[0056] The first radiation branch 3 is parallel to the first side B1, and the second radiation branch 4 is parallel to the second side B2, both of which are approximately parallel, allowing for a certain angular deviation. For example, the included angle between the length direction of the first radiation branch 3 and the extension direction of the first side B1 can be within ±10°, and the included angle between the length direction of the second radiation branch 4 and the extension direction of the second side B2 can also be within ±10°.

[0057] Please refer to Figure 5 , which is the antenna directional diagram of the electronic device 100 in the first low frequency band in some embodiments of the present application. Wherein, Figure 5 may be Figure 1 or Figure 4 the antenna directional diagram obtained by simulation test of the electronic device 100 shown in FIG. 1.

[0058] As shown in FIG. 1, the first radiation branch 3 and the second radiation branch 4 are long strips, the first radiation branch 3 is parallel to the first side B1, and the second radiation branch 4 is parallel to the second side B2. Figure 5As shown, when the first radiating branch 3 operates under the excitation of the first feed source 2 and excites the first ground mode of the ground plane 1, it will excite the current in the ground plane 1 along the first target direction perpendicular to the first side B1, that is, it will excite the current in the direction parallel to the second side B2, which is the shorter side of the ground plane 1.

[0059] Among them, such as Figure 5 As shown, let the first target direction d1 be the X-axis direction, that is, the direction perpendicular to the first side B1 or parallel to the second side B2. Let the second target direction d2 be the Y-axis direction, that is, the direction perpendicular to the first side B1 or parallel to the second side B2. From Figure 5 As can be seen, when the electronic device 100 operates in the first low-frequency band, the antenna pattern is relatively rounded and prominent in the two opposite directions parallel to the Y-axis, with a strong pattern. However, in the two opposite directions parallel to the X-axis, the pattern is concave and weak. Generally, when the electronic device 100 is held normally, the second side B2 of the ground plane 1 (which is the shorter side) is usually horizontal, that is, the X-axis direction is usually horizontal. Since the weaker position of the antenna pattern is in the horizontal direction, the ground plane 1 is excited in the first ground plane mode, which can also be called the horizontal mode.

[0060] Please see Figure 6 This refers to the antenna pattern of the electronic device 100 operating in the second low-frequency band in some embodiments of this application. Figure 6 It can also be Figure 1 or Figure 4 The antenna pattern obtained from the simulation test of the electronic device 100 shown.

[0061] like Figure 6 As shown, when the second radiating stub 4 operates under the coupling excitation of the first feed source 2 and excites the second ground mode of the ground plane 1, it will excite the current in the ground plane 1 along the second target direction perpendicular to the second side B2, that is, it will excite the current in the direction parallel to the first side B1, which is the long side of the ground plane 1.

[0062] Similarly, such as Figure 6 As shown, let the first target direction d1 be the X-axis direction, that is, the direction perpendicular to the first side B1 or parallel to the second side B2. Let the second target direction d2 be the Y-axis direction, that is, the direction perpendicular to the first side B1 or parallel to the second side B2. From Figure 6As can be seen, when the electronic device 100 works in the second low-frequency frequency band, the antenna pattern is relatively round and prominent in the two opposite directions parallel to the X-axis direction, and the direction pattern is relatively strong, while in the two opposite directions parallel to the Y-axis direction, the direction pattern presents a relatively obvious depression, and the direction pattern is relatively weak. At this time, since the weak position of the antenna pattern is in the longitudinal direction, at this time, the second ground plate mode, which can also be called the longitudinal mode, is excited in the ground plate 1.

[0063] In some embodiments, since the first low-frequency frequency band and the second low-frequency frequency band are relatively close, the antenna pattern in the first low-frequency frequency band and the antenna pattern in the second low-frequency frequency band have a mutual gain effect, so that when the antenna pattern in the first low-frequency frequency band is relatively strong along the two opposite directions of the Y-axis direction, and the antenna pattern in the second low-frequency frequency band is relatively strong along the two opposite directions of the X-axis direction, the final direction pattern of each low-frequency frequency band along the X-axis direction and the Y-axis direction is relatively strong, and the antenna radiation performance can be effectively improved.

[0064] In some embodiments, the first ground plate 1 excited first ground plate mode, that is, the transverse mode, can be regarded as a transverse mode, and the second ground plate mode excited by the first ground plate 1, that is, the longitudinal mode, can be regarded as a longitudinal mode. On the frequency axis, the longitudinal mode is in front, and the transverse mode is in back, that is, the phase of the longitudinal mode is ahead of the phase of the transverse mode by a certain angle.

[0065] Please refer to Figure 7 , which is a schematic diagram of the system total efficiency of the electronic device 100 and the reference electronic device in some embodiments of the present application. The electronic device 100 can be the electronic device in the foregoing Figure 1 or Figure 4 . The reference electronic device is an electronic device that only includes the first radiation branch 3 and does not include the second radiation branch 4.

[0066] In some embodiments, the first low-frequency frequency band is B20, and the second low-frequency frequency band is B28. Figure 7 In some embodiments, the first low-frequency frequency band is B20, and the second low-frequency frequency band is B28. Figure 7 Further, the simulation is performed by taking the first low-frequency frequency band as the B20 frequency band and the second low-frequency frequency band as the B28 frequency band.

[0067] As Figure 7As shown, when the reference electronic device only includes the first radiating branch 3 and does not include the second radiating branch 4, the reference electronic device only works in the first low-frequency frequency band, i.e., the aforementioned B20 frequency band, and the corresponding frequency range is approximately 796-865 MHz, i.e., 0.796-0.865 GHz, and the resonant frequency is approximately 0.83 GHz. Among them, from Figure 7 It can be seen that at the resonant frequency 0.83 GHz of the B20 frequency band, the corresponding total system efficiency is approximately -4.1 dB, and the total system efficiency is relatively high, and good natural efficiency and radiation performance can be achieved in the first low-frequency frequency band. However, as Figure 7 shown, when the reference electronic device only includes the first radiating branch 3 and does not include the second radiating branch 4, the total system efficiency in other frequency bands is very low, and normal work in other frequency bands cannot be achieved.

[0068] As Figure 7 shown, the total system efficiency curve St2 of the electronic device 100 of the present application is approximately -3 dB at the resonant frequency 0.83 GHz of the first low-frequency frequency band, i.e., the B20 frequency band, and the total system efficiency is relatively high, and good natural efficiency and radiation performance can be achieved in the first low-frequency frequency band. In addition, at the resonant frequency 0.72 GHz of the second low-frequency frequency band, i.e., the B28 frequency band, the corresponding total system efficiency is approximately -2 dB, and the total system efficiency is very high, and good natural efficiency and radiation performance can also be achieved in the second low-frequency frequency band.

[0069] Therefore, compared with the reference electronic device only including the first radiating branch 3 and not including the second radiating branch 4, the electronic device 100 of the present application can work in multiple low-frequency frequency bands, effectively widening the frequency width.

[0070] Please refer to Figure 8 , which is another simple structure diagram of the electronic device 100 in some embodiments of the present application. As described above, the ground plate 1 is rectangular, as Figure 8As shown, the ground plate 1 further comprises a third edge B3 opposite and parallel to the first edge B1, and a fourth edge B4 opposite and parallel to the second edge B2, and the electronic device 100 further comprises a second feed source 5, a third feed source 6, a third radiation branch 7, and a fourth radiation branch 8. The third radiation branch 7 comprises a second feed point F2 connected to the second feed source 5 and a third ground point G3 connected to the third edge B3, and supports the transceiving of electromagnetic wave signals in the first low-frequency frequency band under the excitation of the second feed source 5. The fourth radiation branch 8 comprises a third feed point F3 connected to the third feed source 6 and a fourth ground point G4 connected to the third edge B3, and supports the transceiving of electromagnetic wave signals in the second low-frequency frequency band under the excitation of the third feed source 6.

[0071] Therefore, in the present application, the second feed source 5, the third feed source 6, the third radiation branch 7, and the fourth radiation branch 8 are additionally provided, and the third radiation branch 7 and the fourth radiation branch 8 can further support the transceiving of electromagnetic wave signals in the first low-frequency frequency band and the second low-frequency frequency band under the excitation of the second feed source 5 and the third feed source 6 respectively, so as to form a low-frequency MIMO (Multiple Input Multiple Output) antenna system together with the first radiation branch 3 and the second radiation branch 4, and further improve the antenna performance in the low-frequency frequency band.

[0072] In some embodiments, similar to the first radiation branch 3, the third radiation branch 7 can further excite the first ground plate mode of the ground plate 1, and further improve the antenna performance in the first low-frequency frequency band. Specifically, the fourth ground point G4 of the fourth radiation branch 8 can be connected to a position of the third edge B3 close to the fourth edge B4, so as to excite a current in a direction parallel to the fourth edge B4, i.e., a direction parallel to the second edge B2, and excite the second ground plate mode of the ground plate 1, and further improve the antenna performance in the second low-frequency frequency band.

[0073] In some embodiments, similar to the first radiation branch 3, the third radiation branch 7 can further excite the first ground plate mode of the ground plate 1, and further improve the antenna performance in the first low-frequency frequency band. Specifically, the fourth ground point G4 of the fourth radiation branch 8 can be connected to a position of the third edge B3 close to the fourth edge B4, so as to excite a current in a direction parallel to the fourth edge B4, i.e., a direction parallel to the second edge B2, and excite the second ground plate mode of the ground plate 1, and further improve the antenna performance in the second low-frequency frequency band. Figure 8As shown, the third radiating branch 7 can be elongated and approximately parallel to the third side B3. The fourth radiating branch 8 can be bent and includes two branch segments 81 and 82. One branch segment 81 is adjacent to and approximately parallel to the fourth side B4, and the other branch segment 82 is adjacent to and approximately parallel to the third side B3. That is, the fourth radiating branch 8 can be specifically located at the apex where the third side B3 and the fourth side B4 meet. Therefore, by setting the fourth radiating branch 8 in a bent shape and placing it at the apex where the third side B3 and the fourth side B4 meet, the required length of the fourth radiating branch 8 can be ensured while reducing the space occupied by the electronic device 100.

[0074] Specifically, the second feed source 5 is used to output the aforementioned first feed signal, and to excite the third radiating stub 7 to operate in the first low-frequency band. The third feed source 6 is specifically used to output the aforementioned second feed signal, and to excite the fourth radiating stub 8 to operate in the second low-frequency band.

[0075] Among them, such as Figure 8 As shown, the third grounding point G3 is located at one end of the third radiating branch 7, and the other end of the third radiating branch 7 is an open circuit. Similarly, the fourth grounding point G4 is located at one end of the fourth radiating branch 8, specifically at the end of the branch segment 82 that is adjacent to and approximately parallel to the third side B3, away from the branch segment 81. The other end of the fourth radiating branch 8 is an open circuit, that is, the end of the branch segment 81 that is adjacent to and approximately parallel to the fourth side B4, away from the branch segment 82, is an open circuit.

[0076] Among them, such as Figure 1 , Figure 4 as well as Figure 8 As shown in the figures, in some embodiments, the first radiating stub 3, the third radiating stub 7, and the fourth radiating stub 8 can be an IFA (Inverted F antenna) antenna structure. Obviously, in other embodiments, the first radiating stub 3, the third radiating stub 7, and the fourth radiating stub 8 can also be any other type of antenna structure, such as a monopole or a T-antenna.

[0077] Obviously, in some embodiments, the electronic device 100 may include multiple antenna structures, each antenna structure may include the aforementioned first feed 2, first radiating stub 3, and second radiating stub 4, and each antenna structure is located at a different apex position of the ground plane 1. For example, for one of the antenna structures, it may be as follows: Figure 1 and Figure 4As shown, the first radiating branch 3 of one of the antenna structures is arranged adjacent to the first side B1, the first ground point G1 of the first radiating branch 3 is connected to the first side B1, the second radiating branch 4 is arranged adjacent to and spaced apart from the first radiating branch 3, and the second radiating branch 4 is arranged adjacent to the second side B2, and the second ground point G2 of the second radiating branch 4 is connected to the second side B2. For another of the antenna structures, the first radiating branch 3 of the other antenna structure can be arranged adjacent to the third side B3, and the first ground point G1 of the first radiating branch 3 is connected to the third side B3. The second radiating branch 4 of the other antenna structure is arranged adjacent to and spaced apart from the first radiating branch 3, and the second radiating branch 4 is arranged adjacent to the fourth side B4, and the second ground point G2 of the second radiating branch 4 is connected to the fourth side B4.

[0078] In this application, the arrangement of the first radiating branch 3 adjacent to the first side B1 of the ground plate 1 means that the first radiating branch 3 is arranged adjacent to and spaced apart from the first side B1 of the ground plate 1 with a small spacing, for example, less than 1 cm, etc. Similarly, the arrangement of the second radiating branch 4 adjacent to the second side B2 of the ground plate 1 means that the second radiating branch 4 is arranged adjacent to and spaced apart from the second side B2 of the ground plate 1 with a small spacing, for example, less than 1 cm, etc. Similarly, when the electronic device 100 further includes a third radiating branch 7 and a fourth radiating branch 8, or further includes other first radiating branches 3 and second radiating branches 4, the arrangement of these radiating branches adjacent to the corresponding sides means that these radiating branches are arranged adjacent to and spaced apart from the corresponding sides with a small spacing, for example, less than 1 cm, etc.

[0079] In this application, Figures 1-4 and Figure 8 etc. are only a simple schematic diagram showing the approximate structural relationship of the ground plate 1, the feed 2, and the first radiating branch 3 and the second radiating branch 4, and do not represent the actual size or position relationship.

[0080] In this application, Figures 1-4 and Figure 8 The ground plate 1 in

[0081] Please refer to Figure 9 for a plan view showing part of the internal structure of the electronic device 100 in some embodiments of the application. As shown in Figure 9 , the electronic device 100 includes a middle frame 9, and the ground plate 1 is at least part of the area in the middle frame 9.

[0082] That is, in some embodiments, the ground plate 1 can specifically be the middle frame 9, or a part of the middle frame 9 isolated by a gap.

[0083] In general, the middle frame 9 of the electronic device 100 is made of metal material, and is the whole machine ground of the electronic device 100. In some embodiments of the present application, by reusing at least part of the middle frame 9 as the ground plate 1, no additional antenna structure needs to be added, saving cost and space.

[0084] Please refer to Figure 10 , which is a schematic view of the back of the electronic device 100 in some embodiments of the present application. As Figure 10 shown, in some embodiments, the electronic device 100 includes a metal back cover 10, and the ground plate 1 is at least part of the metal back cover 10.

[0085] That is, in some embodiments, the ground plate 1 can specifically be the metal back cover 10, or a part of the metal back cover 10 isolated by a gap. The metal back cover 10 can be connected to the middle frame 9 for grounding.

[0086] Therefore, in some embodiments of the present application, by reusing at least part of the metal back cover 10 as the ground plate 1, no additional ground plate structure needs to be added, saving cost and space.

[0087] Obviously, in some embodiments, when the ground plate 1 is at least part of the middle frame 9, the back cover of the electronic device 100 can not be a metal back cover, but can be a back cover of other materials, such as a plastic back cover, a ceramic back cover, etc.

[0088] Since both the middle frame 9 and the metal back cover 10 have a large size, they can meet the size requirement of low-frequency radiation. Since the wavelength corresponding to the low-frequency band is relatively long, in general, the electrical length of the middle frame 9 or the metal back cover 10 of different manufacturers along the first target direction can basically meet the requirement of being substantially equal to nλ 1+ / 4, and the size of the general middle frame 9 or metal back cover 10 along the second target direction can be substantially equal to nλ 2+ / 4, thereby basically meeting the length requirement.

[0089] As mentioned above, the ground plate 1 can also be a part of the middle frame 9 isolated by a gap, or the ground plate 1 can also be a part of the metal back cover 10 isolated by a gap, so that the corresponding size of the region can be more accurately isolated according to the wavelengths corresponding to the first low-frequency band and the second low-frequency band.

[0090] When the grounding plate 1 is a portion of the middle frame 9 isolated by a gap, this portion serving as the grounding plate 1 is electrically isolated from other areas and filled with insulating material between it and other areas to maintain the overall structural stability of the middle frame 9. Similarly, when the grounding plate 1 is a portion of the metal back cover 10 isolated by a gap, this portion serving as the grounding plate 1 is electrically isolated from other areas and filled with insulating material between it and other areas to maintain the overall structural stability of the metal back cover 10.

[0091] Among them, such as Figure 10 As shown, a camera hole 101 can be opened on the metal back cover 10 to allow the rear camera (not shown in the figure) of the electronic device 100 to receive light for taking pictures.

[0092] In some embodiments, the first radiating branch 3 is spaced apart from the first side B1, and the second radiating branch 4 is spaced apart from the second side B2.

[0093] Please see Figure 11 This is another planar schematic diagram illustrating part of the internal structure of an electronic device 100 in some embodiments of this application. For example... Figure 11 As shown, in some embodiments, the electronic device 100 includes a frame 11, and the aforementioned first radiating branch 3 and second radiating branch 4 may be metal segments disposed on the frame 11.

[0094] In some embodiments, such as Figure 11 As shown, the frame 11 can be a metal frame, and the first radiating branch 3, the second radiating branch 4, etc. can be metal frame segments 111 formed by opening gaps X1 in the metal frame.

[0095] in, Figure 11 The grounding plate 1 shown may be at least a portion of the aforementioned middle frame 9, or at least a portion of the aforementioned metal back cover 10.

[0096] The electronic device 100 includes a top D1, a bottom D2, and two sides D3 and D4. For example... Figure 11 The ground plane 1 is rectangular, including opposing first sides B1 and B3, and opposing second sides B2 and B4. The first sides B1 and B3 of the ground plane 1 are adjacent to and parallel to the two sides D3 and D4 of the electronic device 100, respectively. The second sides B2 and B4 of the ground plane 1 are adjacent to and parallel to the two top sides D1 and bottom sides D2 of the electronic device 100, respectively.

[0097] Thus, in some embodiments, the first radiation branch 3 is arranged at the side D3 of the electronic device 100, and can be a metal frame segment 111 separated from the metal frame at the side D3 of the electronic device 100 by a gap X1, and the second radiation branch 4 is arranged at the top D1 of the electronic device 100, and can be a metal frame segment 111 separated from the metal frame at the top D1 of the electronic device 100 by a gap X1.

[0098] Obviously, in some embodiments, the second radiation branch 4 can also be a metal frame segment 111 formed by opening a gap X1 in the metal frame at the bottom D2.

[0099] It is obvious that, in some embodiments, the second radiation branch 4 can also be a metal frame segment 111 formed by opening a gap X1 in the metal frame at the bottom D2.

[0100] In some embodiments, the bottom end of the electronic device 100 is the end provided with the earphone hole and the USB hole, and the top of the electronic device 100 is the other end opposite to the end provided with the earphone hole and the USB hole, which can also refer to the end provided with the camera and the microphone.

[0101] That is, in some embodiments, the frame 11 of the electronic device 100 can also be a non-metal frame such as a plastic, a plastic, a ceramic, etc. with low conductivity. The first radiation branch 3 and the second radiation branch 4 are metal segments arranged in the frame 11 of the electronic device 100, for example, metal segments attached to the inner side wall of the frame 11 of the electronic device 100.

[0102] That is, in some embodiments of the present application, the first radiation branch 3 and the second radiation branch 4 can be directly formed by the frame 11 or carried and fixed on the frame 11. Thus, in some embodiments, the first radiation branch 3 is arranged apart from the first side B1 of the ground plate 1, and the second radiation branch 4 can be arranged apart from the second side B2 of the ground plate 1.

[0103] In some embodiments, the first radiating segment 3 and the second radiating segment 4 may be an FPC (flexible printed circuit) fixed on the antenna bracket or an LDS (Laser-Direct-structuring) metal segment formed on the antenna bracket by laser engraving technology, or a PDS metal segment formed on the antenna bracket by PDS (Printing Direct Structure) technology (for example, forming a metal segment by printing conductive ink, conductive silver paste, etc. on the antenna bracket), and fixed to the electronic device 100 by the antenna bracket.

[0104] In some embodiments, the first radiating branch 3 can also be disposed on the first side B1 of the ground plane 1 via an antenna bracket, and the second radiating branch 4 can also be disposed on the second side B2 of the ground plane 1 via an antenna bracket.

[0105] Wherein, when the first radiating branch 3 can also be set on the first side B1 of the ground plane 1 through the antenna bracket, and the second radiating branch 4 can also be set on the second side B2 of the ground plane 1 through the antenna bracket, the first radiating branch 3 can be set at an interval from the first side B1 of the ground plane 1 through the antenna bracket or attached to the first side B1 of the ground plane 1, and the second radiating branch 4 can be set at an interval from the second side B2 of the ground plane 1 through the antenna bracket or attached to the second side B2 of the ground plane 1.

[0106] Among them, such as Figure 11 As shown, the electronic device 100 may further include a motherboard 12, which contains functional chips such as a processor and a memory. The feed source 2 and other components may be mounted on the motherboard 12.

[0107] in, Figure 11 This can be a schematic diagram viewed from the front of the electronic device 100, that is, from the side of the display screen of the electronic device 100, wherein the motherboard 12 may be located on the side of the middle frame 9 opposite to the front of the electronic device 100, that is, on the side of the middle frame 9 opposite to the display screen of the electronic device 100.

[0108] Obviously, as mentioned above, when the electronic device 100 includes a metal back cover 10, the ground plane 1 can also be the metal back cover 10 or a portion of the metal back cover 10.

[0109] In some embodiments, the ground plane 1 may also be at least a portion of the grounding layer in the motherboard 12.

[0110] That is, in the present application, the ground plate 1 can be at least a partial area of the middle frame 9, or the ground plate 1 is at least a partial area of the metal back cover 10, or the ground plate 1 is at least a partial area of the ground layer of the main plate 12.

[0111] wherein, Figure 11 The structure of the electronic device 100 shown in the present application is mainly to include Figure 1 The first radiation branch 3 and the second radiation branch 4 shown in the present application are taken as an example for illustration.

[0112] Obviously, when the electronic device 100 further includes a third radiation branch 7 and a fourth radiation branch 8, or further includes other first radiation branches 3 and second radiation branches 4, the third radiation branch 7 and the fourth radiation branch 8, and other first radiation branches 3 and second radiation branches 4 can all be metal segments arranged in the frame 11. For example, the frame 11 can be a metal frame, and the third radiation branch 7 and the fourth radiation branch 8 can be metal frame segments 111 formed by the metal frame by opening a gap X1, or the frame 11 of the electronic device 100 can also be a non-metal frame, and the third radiation branch 7 and the fourth radiation branch 8 can be metal segments arranged in the frame 11 of the electronic device 100. Alternatively, the third radiation branch 7 and the fourth radiation branch 8 can also be arranged on the corresponding side of the ground plate 1 through an antenna support.

[0113] Therefore, the electronic device 100 of the present application can support the transmission and reception of electromagnetic wave signals of two low frequency bands respectively through two radiation branches cooperating with the ground plate 1, which can effectively improve the frequency bandwidth and the antenna radiation performance. In addition, the first ground plate mode of the ground plate 1 is excited by the first radiation branch 3 to support the transmission and reception of electromagnetic wave signals of the first low frequency band, and the second ground plate mode of the ground plate 1 is excited by the second radiation branch 4 to support the transmission and reception of electromagnetic wave signals of the second low frequency band. Even if the first radiation branch 3 and the second radiation branch 4 are in a small clearance environment, i.e. in an environment with little clearance around, the antenna radiation performance of the first low frequency band and the second low frequency band can be effectively ensured through the ground plate 1. In addition, in the present application, the second grounding point G2 is arranged at one end of the second radiation branch 4 close to the first radiation branch 3, which can more effectively conduct the coupling energy to the ground plate 1 and more effectively excite the second ground plate mode of the ground plate 1, thereby effectively improving the antenna radiation performance. In addition, since the second radiation branch 4 is excited by coupling, only one feed source and one feed point are needed to realize the coverage of two low frequency bands, thereby effectively reducing the number of feed elements such as feed tabs and riveted copper columns, and saving costs.

[0114] The electronic device 100 further comprises a memory, a battery, etc., which are not described in detail herein because they are irrelevant to the improvement of the present application.

[0115] The electronic device 100 of the present application can be any electronic device with an antenna, such as a mobile phone, a tablet computer, a notebook computer, etc.

[0116] The electronic device 100 of the present application can support the transmission and reception of electromagnetic wave signals of two low-frequency frequency bands respectively by the two radiation branches in cooperation with the ground plate 1, thereby effectively improving the frequency bandwidth and the antenna radiation performance. In addition, the first ground plate mode of the ground plate 1 is excited by the first radiation branch 3 to support the transmission and reception of electromagnetic wave signals of a first low-frequency frequency band, and the second ground plate mode of the ground plate 1 is excited by the second radiation branch 4 to support the transmission and reception of electromagnetic wave signals of a second low-frequency frequency band. Even if the first radiation branch 3 and the second radiation branch 4 are in a small clearance environment, i.e., in an environment with little clearance around, the antenna radiation performance of the first low-frequency frequency band and the second low-frequency frequency band can be effectively ensured by the ground plate 1. In addition, in the present application, the second ground point G2 is arranged at one end of the second radiation branch 4 close to the first radiation branch 3, which can more effectively conduct the coupling energy to the ground plate 1 and more effectively excite the second ground plate mode of the ground plate 1, thereby effectively improving the antenna radiation performance. In addition, since the second radiation branch 4 is excited by coupling, only one feed source and one feed point are needed to realize the coverage of two low-frequency frequency bands, thereby effectively reducing the number of feed elements such as feed tabs and riveted copper columns and saving costs.

[0117] In various embodiments of the present application, the structures not described in detail in some embodiments can be referred to the content of the corresponding structures in other embodiments without conflict.

[0118] The above description is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art can easily think of changes or replacements within the technical scope disclosed by the present application, which should be covered within the protection scope of the present application. In the case of no conflict, the embodiments of the present application and the features in the embodiments can be combined with each other. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. An electronic device, comprising: The electronic device comprises: a ground plate comprising a first side and a second side connected with the first side, wherein the ground plate is rectangular, the first side is a long side, and the second side is a short side; a first feed source; a first radiating branch adjacent to and parallel with the first side, the first radiating branch comprising a first feed point and a first ground point, the first feed point being connected with the first feed source, and the first ground point being connected with the first side, the first radiating branch being used to resonate in a first low-frequency frequency band under the excitation of the first feed source and to excite a first plate mode of the ground plate so that the ground plate resonates in the first low-frequency frequency band simultaneously and supports the transmission and reception of electromagnetic wave signals in the first low-frequency frequency band together; a second radiating branch adjacent to and spaced apart from the first radiating branch, and the second radiating branch being adjacent to and parallel with the second side, the second radiating branch comprising a second ground point, the second ground point being arranged at one end of the second radiating branch close to the first radiating branch and connected with the second side, the second radiating branch being coupled with the first radiating branch and used to resonate in a second low-frequency frequency band under the coupled excitation of the first feed source and to excite a second plate mode of the ground plate so that the ground plate resonates in the second low-frequency frequency band simultaneously and supports the transmission and reception of electromagnetic wave signals in the second low-frequency frequency band together.

2. The electronic device of claim 1, wherein, The first radiating branch comprises a first free end and a first ground end, the second radiating branch comprises a second ground end and a second free end, the first free end of the first radiating branch is adjacent to and spaced apart from the second ground end of the second radiating branch, the first ground point is arranged at the first ground end of the first radiating branch, and the first feed point is located between the first free end and the first ground end; and the second ground point is arranged at the second ground end of the second radiating branch.

3. The electronic device of claim 2, wherein, The second ground point is connected with a target position of the second side, and the target position is an end portion of the second side connected with the first side.

4. The electronic device of claim 1, wherein, An electrical length of the first radiating branch is λ1 / 4, wherein λ1 is a wavelength corresponding to the first low-frequency frequency band, the first radiating branch resonates in the first low-frequency frequency band under the excitation of the first feed source, at the same time, the first radiating branch does not excite the ground plate to generate a current along a first target direction, so that the ground plate resonates in the first low-frequency frequency band simultaneously and supports the transmission and reception of electromagnetic wave signals in the first low-frequency frequency band together; and the first target direction is a direction perpendicular to the first side.

5. The electronic device of claim 1, wherein, The electronic device further comprises a matching element, a second ground of the second radiation branch is connected with the second side through the matching element, and an equivalent electric length of the matching element and an electric length of the second radiation branch are equal to λ2 / 4, where λ2 is a wavelength corresponding to the second low-frequency frequency band, the second radiation branch resonates in the second low-frequency frequency band under coupling excitation of the first feed source, meanwhile, the second radiation branch excites the ground plate to generate a current along a second target direction, so that the ground plate resonates in the second low-frequency frequency band and supports the transmission and reception of electromagnetic wave signals in the second low-frequency frequency band together; and the second target direction is perpendicular to the second side.

6. The electronic device of claim 1, wherein, The electronic device further comprises a matching element, a second ground of the second radiation branch is connected with the second side through the matching element, and an equivalent electric length of the matching element and an electric length of the second radiation branch are equal to λ2 / 4, where λ2 is a wavelength corresponding to the second low-frequency frequency band, the second radiation branch resonates in the second low-frequency frequency band under coupling excitation of the first feed source, meanwhile, the second radiation branch excites the ground plate to generate a current along a second target direction, so that the ground plate resonates in the second low-frequency frequency band and supports the transmission and reception of electromagnetic wave signals in the second low-frequency frequency band together; and the second target direction is perpendicular to the second side.

7. The electronic device of claim 1, wherein, The first radiation branch is arranged apart from the first side, and the second radiation branch is arranged apart from the second side.

8. The electronic device of claim 1, wherein, The first radiation branch and the second radiation branch are long strips, the first radiation branch is parallel to the first side, and the second radiation branch is parallel to the second side.

9. The electronic device of claim 1, wherein, The ground plate is a rectangle, the ground plate further comprises a third side and a fourth side connected with the third side, the third side is opposite to and parallel to the first side, and the fourth side is opposite to and parallel to the second side, the electronic device further comprises a second feed source, a third feed source, a third radiation branch and a fourth radiation branch, the third radiation branch comprises a second feeding point and a third grounding point, the third radiation branch is arranged adjacent to the third side, the second feeding point is connected with the second feed source, the third grounding point is connected with the third side, and the third radiation branch supports the transmission and reception of electromagnetic wave signals in the first low-frequency frequency band under excitation of the second feed source; the fourth radiation branch comprises a third feeding point and a fourth grounding point, the fourth radiation branch is arranged adjacent to the third side and the fourth side, the third feeding point is connected with the third feed source, and the fourth grounding point is connected with the third side, and the fourth radiation branch supports the transmission and reception of electromagnetic wave signals in the second low-frequency frequency band under excitation of the third feed source.

10. The electronic device according to any one of claims 1-9, wherein the electronic device comprises a middle frame, the ground plate is at least a partial region in the middle frame, or the electronic device comprises a metal back cover, the ground plate is at least a partial region in the metal back cover, or the electronic device comprises a main board, and the ground plate is at least a partial region of a ground layer of the main board.

11. The electronic device of claim 1, wherein, The electronic device includes a frame, and the first radiating branch and the second radiating branch are metal segments arranged in the frame.

12. The electronic device of claim 11, wherein, The frame is a metal frame, and the first radiating branch and the second radiating branch are metal frame segments formed by a gap in the metal frame.

13. The electronic device of claim 11, wherein, The frame is a non-metal frame, and the first radiating branch and the second radiating branch are metal segments arranged in the frame.

14. The electronic device of claim 1, wherein, The first radiating branch is arranged on a first side of the ground plate through an antenna support, and the second radiating branch is arranged on a second side of the ground plate through an antenna support.

15. The electronic device of claim 14, wherein the first radiating branch and the second radiating branch are FPCs fixed on the antenna support, LDS metal segments formed on the antenna support through a laser technology, or PDS metal segments formed on the antenna support through a PDS technology.

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