Electronic device

Abstract

The embodiment of the present application provides an electronic device, comprising: a floor comprising a first side edge and a second side edge; a first radiator; a second radiator; a feed source configured to feed a first excitation signal to the first radiator and a second excitation signal to the second radiator; the first excitation signal is configured to excite the first radiator and the floor to generate a first resonance, and the first resonance generates a first resonance current on the floor; the second excitation signal is configured to excite the second radiator and the floor to generate a second resonance, and the second resonance generates a second resonance current on the floor; the first resonance current and the second resonance current form a combined current on the floor, and the first excitation signal and the second excitation signal have a phase difference, so that the component of the combined current along the first side edge is greater than the component along the second side edge. The electronic device of the embodiment of the present application can obtain higher antenna radiation efficiency and improve the wireless communication performance of the electronic device.

Description

TECHNICAL FIELD

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

[0002] Electronic devices such as smart phones are provided with antennas to realize wireless communication functions.

[0003] In the related art, with the continuous evolution of antenna design, due to the influence of factors such as miniaturization, thinness and high screen ratio of electronic devices, the antenna clearance is continuously reduced, resulting in very limited antenna performance, especially in the low frequency band (0.617GHz-0.96GHz), the antenna radiation efficiency is poor. SUMMARY

[0004] The electronic device provided by the embodiments of the present application can improve the efficiency of the electronic device in radiating wireless signals, thereby improving the wireless communication performance of the electronic device.

[0005] The electronic device provided by the embodiments of the present application comprises:

[0006] a floor, the floor comprising a first side and a second side, the first side being connected with the second side and perpendicular to each other, the length of the first side being greater than the length of the second side;

[0007] a first radiator, disposed along the first side and electrically connected with the floor;

[0008] a second radiator, disposed along the first side and electrically connected with the floor;

[0009] a feed source, electrically connected with the first radiator and the second radiator, the feed source being configured to feed a first excitation signal to the first radiator and a second excitation signal to the second radiator;

[0010] the first excitation signal is configured to excite the first radiator and the floor to generate a first resonance together, the first resonance generating a first resonance current on the floor;

[0011] the second excitation signal is configured to excite the second radiator and the floor to generate a second resonance together, the second resonance generating a second resonance current on the floor, the frequency band of the second resonance being the same as that of the first resonance;

[0012] wherein the first resonance current and the second resonance current form a combined current on the floor, the first excitation signal and the second excitation signal having a phase difference, so that the component of the combined current along the first side is greater than that along the second side.

[0013] In the electronic device of the embodiment of the present application, by setting the first excitation signal and the second excitation signal to have a phase difference, the combined current of the first resonant current and the second resonant current can mainly flow along the first side edge of the floor, so that the floor of a larger size can be excited to resonate together, thereby enhancing the longitudinal resonance of the floor and weakening the transverse resonance of the floor, and thus the strength of the radiation of the wireless signal of the first radiator, the second radiator and the floor as a whole can be enhanced, higher antenna radiation efficiency is obtained, and the wireless communication performance of the electronic device is improved. BRIEF DESCRIPTION OF DRAWINGS

[0014] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the embodiment description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor on the basis of these drawings.

[0015] Figure 1 The first structure schematic diagram of the electronic device of the embodiment of the present application.

[0016] Figure 2 The structure schematic diagram of the metal middle frame of the electronic device shown in the figure. Figure 1

[0017] Figure 3 The distribution schematic diagram of the first resonant current of the floor in the electronic device of the embodiment of the present application.

[0018] Figure 4 The distribution schematic diagram of the second resonant current of the floor in the electronic device of the embodiment of the present application.

[0019] Figure 5 The phase difference schematic diagram of the first excitation signal and the second excitation signal of the embodiment of the present application.

[0020] Figure 6 The distribution schematic diagram of the combined current of the first resonant current and the second resonant current of the floor in the electronic device of the embodiment of the present application.

[0021] Figure 7 The second structure schematic diagram of the electronic device of the embodiment of the present application.

[0022] Figure 8 The third structure schematic diagram of the electronic device of the embodiment of the present application.

[0023] Figure 9 The fourth structure schematic diagram of the electronic device of the embodiment of the present application.

[0024] Figure 10 The S parameter schematic diagram of the electronic device of the embodiment of the present application. ​

[0025] Figure 11 Radiation efficiency diagram of the electronic device of the embodiment of the present application.

[0026] Figure 12 Diagram of the electronic device of the embodiment of the present application when held by the left hand of the user.

[0027] Figure 13 Diagram of the electronic device of the embodiment of the present application when held by the right hand of the user.

[0028] Figure 14 System efficiency diagram of the first radiator of the electronic device of the embodiment of the present application operating in the B8 frequency band.

[0029] Figure 15 System efficiency diagram of the electronic device of the embodiment of the present application operating in the B8 frequency band.

[0030] Figure 16 System efficiency diagram of the first radiator of the electronic device of the embodiment of the present application operating in the B28 frequency band.

[0031] Figure 17 System efficiency diagram of the electronic device of the embodiment of the present application operating in the B28 frequency band. DETAILED DESCRIPTION

[0032] 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. Obviously, the described embodiments are only part of the embodiments of the present application, not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0033] The embodiments of the present application provide an electronic device. The electronic device may, for example, be a smart phone, a tablet computer, a game device, an AR (Augmented Reality) device, a notebook computer, a desktop computing device, etc. device with wireless communication function.

[0034] Reference Figure 1 , Figure 1 The first structure diagram of the electronic device 100 of the embodiment of the present application is shown in FIG. 1. The electronic device 100 includes a first radiator 11, a second radiator 12, a feed source 13, and a floor 19.

[0035] The floor 19 can form a reference ground of the electronic device 100, or be referred to as a system ground. In actual applications, the floor 19 can be formed by a conductor structure in the electronic device 100, a metal layer on a circuit board, etc.

[0036] In some embodiments, asFigure 1 As shown, the electronic device 100 further includes a metal middle frame 20. The metal middle frame 20 includes a main body part 21 and a metal bezel 22 surrounding a periphery of the main body part 21. In actual applications, the main body part 21 and the metal bezel 22 can both be made of metal or alloy, for example, magnesium alloy, aluminum alloy, etc. The floor 19 can be formed by the main body part 21.

[0037] The first radiator 11 and the second radiator 12 can both be an antenna radiator in the form of FPC (Flexible Printed Circuit), LDS (Laser Direct Structure), PDS (Printing Direct Structure), etc., or can be an antenna radiator formed by a conductor structure of the electronic device, a metal trace on a circuit board, etc. In actual applications, the first radiator 11 and the second radiator 12 can be different forms of antenna radiators, or can be the same form of antenna radiators. The form and size of the first radiator 11 and the second radiator 12 can be set according to actual needs. The first radiator 11 and the second radiator 12 are both electrically connected to the floor 19 to achieve grounding.

[0038] The feed source 13 can be disposed on a circuit board of the electronic device, for example, on a mainboard, or can be disposed on a separate small board. The feed source 13 is used to provide an excitation signal, which can be a 4G excitation signal, a 5G excitation signal, etc.

[0039] The feed source 13 is electrically connected to the first radiator 11 and the second radiator 12. The feed source 13 is used to feed the first excitation signal to the first radiator 11, and is used to feed the second excitation signal to the second radiator 12. The first excitation signal is used to excite the first radiator 11 and the floor 19 to generate a first resonance together, so as to radiate a wireless signal of the first resonance to the outside. The second excitation signal is used to excite the second radiator 12 and the floor 19 to generate a second resonance together, so as to radiate a wireless signal of the second resonance to the outside. It can be understood that, since the first radiator 11 and the second radiator 12 share the same feed source 13, the communication information carried by the first excitation signal and the second excitation signal is the same.

[0040] In the embodiment of the present application, the frequency band of the second resonance is the same as the frequency band of the first resonance, for example, both can be low-frequency bands, and the frequency range of the low-frequency band is 690MHz to 960MHz. For example, in an example of actual application, the frequency band of the second resonance and the frequency band of the first resonance can both be 4G communication B8 (uplink frequency 880MHz to 915MHz, downlink frequency 925MHz to 960MHz), B28 (uplink frequency 703MHz to 748MHz, downlink frequency 758MHz to 803MHz) and other frequency bands.

[0041] In some embodiments, the first radiator 11 includes a first end 111 and a second end 112 relative to each other. The first end 111 is grounded, and the second end 112 is a free end. The feed source 13 is electrically connected between the first end 111 and the second end 112 to feed the first excitation signal. Therefore, the first radiator 11 can form a first IFA (Inverted-F antenna) antenna. The first IFA antenna forms a first open end at the second end 112. In practical applications, the first IFA antenna can be a quarter-wavelength antenna, which is the wavelength corresponding to the center frequency of the first resonance.

[0042] The second radiator 12 includes a third end 121 and a fourth end 122 opposite to each other. The third end 121 is grounded, and the fourth end 122 is a free end. The feed source 13 is electrically connected between the third end 121 and the fourth end 122 to feed the second excitation signal. Therefore, the second radiator 12 can form a second IFA antenna. The second IFA antenna forms a second open end at the fourth end 122. In practical applications, the second IFA antenna can also be a quarter-wavelength antenna, where the wavelength is the wavelength corresponding to the center frequency of the second resonance.

[0043] Also refer to Figure 2 , Figure 2 for Figure 1 A schematic structural diagram of a metal middle frame 20 of an electronic device is shown.

[0044] Among them, the main body 21 includes a first side 211 and a second side 212. The first side 211 can be understood as the first side of the floor 19, and the second side 212 can be understood as the second side of the floor 19. Among them, the first side 211 is connected to the second side 212, and the first side 211 and the second side 212 are perpendicular to each other. The length of the first side 211 is greater than the length of the second side 212, that is, the first side 211 is the long side and the second side 212 is the short side. When the electronic device 100 is used in portrait mode by the user, the first side 211 can be understood as the longitudinal side, and the second side 212 can be understood as the transverse side.

[0045] In some embodiments, the first radiator 11 and the second radiator 12 are both arranged along the first side edge 211 and electrically connected to the ground plate 19. For example, in a feasible example, the first radiator 11 and the second radiator 12 are both arranged parallel to the first side edge 211. In this case, the first open end of the first IFA antenna and the second open end of the second IFA antenna are opposite to each other. The gap 10a is between the first open end and the second open end.

[0046] The metal frame 22 includes a first metal branch 22a and a second metal branch 22b. The first metal branch 22a and the second metal branch 22b form the gap 10a. The first metal branch 22a forms the first radiator 11, and the second metal branch 22b forms the second radiator 12. Therefore, the metal frame 22 can be reused to form the first radiator 11 and the second radiator 12, thereby saving the layout space inside the electronic device 100.

[0047] In some embodiments, the metal frame 22 includes a third side edge 221 and a fourth side edge 222. The third side edge 221 and the fourth side edge 222 are connected to form a corner 223. In practical applications, the third side edge 221 can be a long side of the electronic device 100, and the third side edge 221 is parallel to the first side edge 211 of the main body 21. The fourth side edge 222 can be a short side of the electronic device 100, and the fourth side edge 222 is parallel to the second side edge 212 of the main body 21. The length of the third side edge 221 is greater than the length of the fourth side edge 222.

[0048] The first radiator 11 (the first metal branch 22a) is located on the third side edge 221 and close to the fourth side edge 222. The first radiator 11 includes a first return point 113, and the first return point 113 is located at the first end 111 of the first radiator 11. The first return point 113 is used for grounding, for example, the first return point 113 is connected to the ground plate 19 to achieve grounding. The first return point 113 is close to the corner 223. Therefore, the first open end of the first IFA antenna formed by the first radiator 11 can be directed towards the second radiator 12.

[0049] The second radiator 12 (the second metal branch 22b) is located on the third side edge 221 and away from the fourth side edge 222. The second radiator 12 includes a second return point 123, and the second return point 123 is located at the third end 121 of the second radiator 12. The second return point 123 is used for grounding, for example, the second return point 123 is connected to the ground plate 19 to achieve grounding. The second return point 123 is located at the end of the second radiator 12 away from the first radiator 11. Therefore, the second open end of the second IFA antenna formed by the second radiator 12 can be directed towards the first radiator 11.

[0050] Reference Figure 3 ,Figure 3 Schematic diagram of the distribution of the first resonant current of the floor 19 in the electronic device of the embodiment of the present application. When the first excitation signal excites the first radiator 11 and the floor 19 to jointly generate the first resonance, the first resonance generates a first resonant current I on the floor 19. 12 , the first resonant current I 12 The direction of Figure 3 In some embodiments, the first resonant current I 12 The first current I1 and the second current I2 are parallel to the first side 211 of the floor 19 , and the second current I2 is parallel to the second side 212 of the floor 19 .

[0051] refer to Figure 4 , Figure 4 Schematic diagram of the distribution of the second resonant current of the floor 19 in the electronic device of the embodiment of the present application. When the second excitation signal excites the second radiator 12 and the floor 19 to jointly generate the second resonance, the second resonance generates a second resonant current I on the floor 19. 34 , the second resonant current I 34 The direction of Figure 4 In some embodiments, the second resonant current I 34 The third current I3 and the fourth current I4 are included. The third current I3 is parallel to the first side 211 of the floor 19 , and the fourth current I4 is parallel to the second side 212 of the floor 19 .

[0052] In the embodiment of the present application, the first resonant current I on the floor 19 12 and the second resonant current I 34 A combined current is formed on the floor. The first excitation signal and the second excitation signal have a phase difference, so that the component of the combined current along the first side 211 is greater than the component along the second side 212, that is, the combined current mainly flows along the first side 211. Figure 5 As shown, Figure 5 The following is a schematic diagram of the phase difference between the first excitation signal and the second excitation signal in an embodiment of the present application. S1 represents the first excitation signal, S2 represents the second excitation signal, i represents the signal amplitude, t represents time, and θ represents the phase difference between the first excitation signal S1 and the second excitation signal S2. In practical applications, the phase difference θ can be determined based on actual conditions. For example, the phase difference θ can be 30 degrees, 90 degrees, 180 degrees, and so on. In one example of practical application, the phase difference θ can be 180 degrees.

[0053] It can be understood that by setting the first excitation signal and the second excitation signal to have a phase difference, the first resonant current I 12 and the second resonant current I 34The resultant current mainly flows along the first side edge 211 of the floor 19, thus being able to collectively excite a larger size of the floor 19 to generate resonance, thereby being able to enhance the longitudinal resonance of the floor 19 and weaken the transverse resonance of the floor 19, thus being able to enhance the strength of the overall radiation of the wireless signals by the first radiator 11, the second radiator 12 and the floor 19, obtain higher antenna radiation efficiency, and improve the wireless communication performance of the electronic device.

[0054] In some embodiments, the first excitation signal and the second excitation signal have a phase difference, the directions of the first current I1 and the third current I3 are the same, and the directions of the second current I2 and the fourth current I4 are opposite, thus the first current I1 and the third current I3 are able to superimpose on each other, and the second current I2 and the fourth current I4 are able to at least partially cancel out. Thus, the superposition of the first current I1 and the third current I3 on each other is able to increase the component of the resultant current along the first side edge 211, and the at least partial cancellation of the second current I2 and the fourth current I4 is able to reduce the component of the resultant current along the second side edge 212, so that the component of the resultant current along the first side edge 211 is greater than the component along the second side edge 212.

[0055] In actual applications, the shape, size and other parameters of the first radiator 11 and the second radiator 12 can be adjusted, and / or the spacing distance between the first radiator 11 and the second radiator 12 and the floor 19 can be adjusted, so as to adjust the distribution of the first resonant current I 12 and the second resonant current I 34 , so that the magnitude of the second current I2 is the same as the magnitude of the fourth current I4. In this case, the second current I2 and the fourth current I4 cancel each other out, so that the component of the above-mentioned resultant current along the second side edge 212 is 0, and at this time the resultant current is parallel to the first side edge 211. Therefore, at this time, the component of the resultant current along the first side edge 211 reaches a maximum, and the component along the second side edge 212 reaches a minimum, so that the strength of the overall radiation of the wireless signals by the first radiator 11, the second radiator 12 and the floor 19 reaches an optimum, and at this time the wireless communication performance of the electronic device also reaches an optimum.

[0056] Reference Figure 6 , Figure 6 is a schematic diagram of the distribution of the resultant current of the first resonant current and the second resonant current of the floor 19 in the electronic device of the embodiments of the present application. In the diagram, the resultant current of the first resonant current I 12 and the second resonant current I 34 is I5, the component of I5 along the first side edge 211 reaches a maximum, and the component along the second side edge 212 is 0, and at this time the resultant current I5 is parallel to the first side edge 211.

[0057] Continuing to refer to Figure 1In actual application, the electronic device 100 can further include a first transmission line 14, a second transmission line 15, and a third transmission line 16. The first transmission line 14, the second transmission line 15, and the third transmission line 16 can be microstrip lines, strip lines, or other types of transmission lines.

[0058] The first transmission line 14 has one end electrically connected to the first radiator 11. The second transmission line 15 has one end electrically connected to the second radiator 12. The third transmission line 16 has one end electrically connected to the other end of the first transmission line 14 and the other end of the second transmission line 15, and the other end of the third transmission line 16 is electrically connected to the feed source 13. The feed source 13 is configured to feed the first excitation signal to the first radiator 11 through the third transmission line 16 and the first transmission line 14, and to feed the second excitation signal to the second radiator 12 through the third transmission line 16 and the second transmission line 15.

[0059] In some embodiments, referring to Figure 7 , Figure 7 FIG. 3 is a second structural schematic diagram of the electronic device 100 according to an embodiment of the present application.

[0060] The first transmission line 14 has a length of L1, and the second transmission line 15 has a length of L2. In the embodiment of the present application, the lengths of the first transmission line 14 and the second transmission line 15 can be designed to be constrained, so that the length L1 of the first transmission line 14 is different from the length L2 of the second transmission line 15, thereby making the first excitation signal and the second excitation signal have a phase difference. In actual application, by designing the difference between L1 and L2, the above-mentioned phase difference θ can reach a desired value.

[0061] In an example of actual application, as shown in Figure 7 , the length L1 of the first transmission line 14 can be made smaller than the length L2 of the second transmission line 15. In another example of actual application, the length L1 of the first transmission line 14 can also be made larger than the length L2 of the second transmission line 15.

[0062] In some embodiments, referring to Figure 8 , Figure 8 FIG. 4 is a third structural schematic diagram of the electronic device 100 according to an embodiment of the present application.

[0063] The electronic device 100 further includes a phase shifter 17. The phase shifter 17 is arranged on the first transmission line 14 or the second transmission line 15, for example Figure 8 , the phase shifter 17 can be arranged on the first transmission line 14. The phase shifter 17 is configured to adjust the phase of the signal flowing therethrough, so that the first excitation signal and the second excitation signal have a phase difference. In actual application, a desired phase shifter specification can be selected, so that the above-mentioned phase difference θ can reach a desired value.

[0064] In some embodiments, referring toFigure 9 , Figure 9 Figure 4 is a fourth structural schematic diagram of an electronic device 100 according to an embodiment of the present application.

[0065] The electronic device 100 further includes a matching network 18. The matching network 18 can include inductance, capacitance and other impedance elements. When the matching network 18 includes multiple inductances or capacitances, the multiple inductances or capacitances can be connected in series or in parallel.

[0066] The matching network 18 is arranged between the third transmission line 16 and the feed source 13. The matching network 18 is used to perform impedance matching on the first radiator 11 and the second radiator 12, so that the first radiator 11 and the second radiator 12 achieve a better resonant state.

[0067] Reference is made to Figure 10 and Figure 11 , Figure 10 Figure 5 is a schematic diagram of S parameters of the electronic device 100 according to an embodiment of the present application, Figure 11 Figure 6 is a schematic diagram of radiation efficiency of the electronic device 100 according to an embodiment of the present application.

[0068] As shown in Figure 10 , where L11 is an S parameter curve when the first radiator 11 and the floor 19 resonate; L12 is an S parameter curve when the second radiator 12 and the floor 19 resonate; L13 is an S parameter curve when the first radiator 11 and the second radiator 12 share the same feed source 13 and resonate with the floor 19 together. As can be seen from Figure 10 , when the first radiator 11 and the second radiator 12 share the same feed source 13, the operating bandwidth at -3dB is wider, so the bandwidth of the electronic device 100 can be expanded.

[0069] As shown in Figure 11 , where L21 is a radiation efficiency curve when the first radiator 11 and the floor 19 resonate; L22 is a system efficiency when the first radiator 11 and the floor 19 resonate; L31 is a radiation efficiency curve when the second radiator 12 and the floor 19 resonate, L32 is a system efficiency when the second radiator 12 and the floor 19 resonate; L41 is a radiation efficiency when the first radiator 11 and the second radiator 12 share the same feed source 13 and resonate with the floor 19 together, L42 is a system efficiency when the first radiator 11 and the second radiator 12 share the same feed source 13 and resonate with the floor 19 together. As can be seen from Figure 11It can be seen that when the first radiator 11 and the second radiator 12 share the same feed 13, the average radiation efficiency in the B28 frequency band (703-803 MHz) is 1.4 dB higher than that when the first radiator 11 and the floor 19 resonate, the average radiation efficiency in the B28 frequency band is 1.7 dB higher than that when the second radiator 12 and the floor 19 resonate, the average system efficiency in the B28 frequency band is 2.2 dB higher than that when the first radiator 11 and the floor 19 resonate, and the average system efficiency in the B28 frequency band is 2.2 dB higher than that when the second radiator 12 and the floor 19 resonate. As can be seen, when the first resonant current I 12 and the second resonant current I 34 The combined current along the first side edge 211 is greater than the component along the second side edge 212, the radiation efficiency and system efficiency of the electronic device 100 are improved.

[0070] Reference Figure 12 and Figure 13 , Figure 12 is a schematic diagram of the electronic device 100 of the embodiment of the present application when held by the left hand of the user, Figure 13 is a schematic diagram of the electronic device 100 of the embodiment of the present application when held by the right hand of the user. In actual application, when the user holds the electronic device 100, the distance between the user's hand and the electronic device 100 (for example, the second radiator 12) is very small, or the user's hand directly contacts the electronic device 100 (for example, contacts the second radiator 12), at this time The electric field generated by the resonance of the electronic device 100 can effectively excite the hand to radiate. At this time, the radiation electric field in the free space is generated by the electronic device 100 and the user's hand, so as to enhance the strength of the wireless signal radiated by the electronic device 100, improve the radiation efficiency of the wireless signal, and thus improve the wireless communication performance of the electronic device.

[0071] Reference Figure 14 and Figure 15 , Figure 14 is a schematic diagram of the system efficiency of the first radiator 11 of the electronic device of the embodiment of the present application operating in the B8 frequency band, Figure 15 is a schematic diagram of the system efficiency of the electronic device 100 of the embodiment of the present application operating in the B8 frequency band.

[0072] L51 is the system efficiency of the first radiator 11 and the floor 19 resonating in the B8 frequency band (frequency range 880MHz-960MHz) when in free space; L52 is the system efficiency of the first radiator 11 and the floor 19 resonating in the B8 frequency band when the user holds the electronic device with the left hand; L53 is the system efficiency of the first radiator 11 and the floor 19 resonating in the B8 frequency band when the user holds the electronic device with the right hand. L61 is the system efficiency of the first radiator 11 and the second radiator 12 sharing the same feed source 13 and resonating in the B8 frequency band together with the floor 19 when in free space; L62 is the system efficiency of the first radiator 11 and the second radiator 12 sharing the same feed source 13 and resonating in the B8 frequency band together with the floor 19 when the user holds the electronic device with the left hand; L63 is the system efficiency of the first radiator 11 and the second radiator 12 sharing the same feed source 13 and resonating in the B8 frequency band together with the floor 19 when the user holds the electronic device with the right hand.

[0073] By comparison of Figure 14 and Figure 15 , it can be seen that in the B8 frequency band, the radiation performance of the first radiator 11 is basically unchanged when the user holds it with the left hand or the right hand; when the first radiator 11 and the second radiator 12 share the same feed source 13, the radiation performance is basically unchanged when the user holds it with the right hand, and the radiation performance is improved by about 1.5dB when the user holds it with the left hand. It can be seen that when the user holds the electronic device with the left hand, the wireless signal radiation efficiency of the electronic device can be improved through the enhancement of the user's hand.

[0074] Reference Figure 16 and Figure 17 , Figure 16 is a system efficiency schematic diagram of the first radiator 11 of the electronic device of the embodiment of the present application working in the B28 frequency band, Figure 17 is a system efficiency schematic diagram of the electronic device 100 of the embodiment of the present application working in the B28 frequency band.

[0075] Among them, L71 is the system efficiency when the first radiator 11 and the floor 19 resonate in the B28 frequency band (frequency range 703MHz-803MHz) in free space; L72 is the system efficiency when the first radiator 11 and the floor 19 resonate in the B28 frequency band when the user holds the electronic device in the left hand; L73 is the system efficiency when the first radiator 11 and the floor 19 resonate in the B28 frequency band when the user holds the electronic device in the right hand. L81 is the system efficiency when the first radiator 11 and the second radiator 12 share the same feed source 13 in free space and resonate with the floor 19 in the B28 frequency band; L82 is the system efficiency when the first radiator 11 and the second radiator 12 share the same feed source 13 and resonate with the floor 19 in the B28 frequency band when the user holds the electronic device in the left hand; L83 is the system efficiency when the first radiator 11 and the second radiator 12 share the same feed source 13 and resonate with the floor 19 in the B28 frequency band when the user holds the electronic device in the right hand.

[0076] Depend on Figure 16 and Figure 17 By comparison, it can be seen that in the B28 frequency band, the system efficiency of the first radiator 11 is about -8.1dB when in free space, about -11.3dB when held in the user's left hand, and about -12.3dB when held in the user's right hand. Therefore, the reduction is 3.2dB when held in the user's left hand, and 4.2dB when held in the user's right hand. When the first radiator 11 and the second radiator 12 share the same feed source 13, the system efficiency is about -5.7dB in free space, about -8dB when held in the user's left hand, and about -8.3dB when held in the user's right hand. Therefore, the reduction is 2.3dB when held in the user's left hand, and 2.6dB when held in the user's right hand. Therefore, compared with the above-mentioned reductions of 3.2dB and 4.2dB, the reduction is significantly smaller, which means that the wireless signal radiation efficiency of the electronic device has been significantly improved.

[0077] It can be seen that when the first radiator 11 and the second radiator 12 share the same feed source 13 and resonate with the floor 19, compared with the resonance of the first radiator 11 and the floor 19, the system efficiency is significantly improved regardless of whether it is in free space or when the user holds it with the left hand or the right hand. Therefore, the radiation performance of the electronic device 100 in the embodiment of the present application has obvious advantages.

[0078] In the description of this application, it should be understood that terms such as "first" and "second" are only used to distinguish similar objects, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features.

[0079] It should be noted that the "electrical connection" in the embodiments of the present application can be direct connection between two electrical elements to achieve electrical connection, or indirect connection to achieve electrical connection. For example, A and B are electrically connected, which can be direct connection between A and B to achieve electrical connection, or indirect connection between A and B through one or more other electrical elements to achieve electrical connection.

[0080] The above describes the electronic device provided by the embodiments of the present application in detail. The principles and implementation manners of the present application are described by applying specific examples in this paper, and the above description of the embodiments is only for helping to understand the present application. Meanwhile, for those skilled in the art, the specific implementation manners and application ranges will be changed according to the idea of the present application, and the above description of the present application should not be understood as the limitation of the present application.

Claims

1. An electronic device, characterized in that: include: A floor, the floor comprising a first side and a second side, the first side and the second side being connected and perpendicular to each other, and the length of the first side being greater than the length of the second side; a first radiator, disposed along the first side and electrically connected to the floor; a second radiator, disposed along the first side and electrically connected to the floor; a feed source electrically connected to the first radiator and the second radiator, the feed source being used to feed a first excitation signal to the first radiator and to feed a second excitation signal to the second radiator; The first excitation signal is used to excite the first radiator and the floor to jointly generate a first resonance, and the first resonance generates a first resonant current on the floor; The second excitation signal is used to excite the second radiator and the floor to jointly generate a second resonance, the second resonance generates a second resonant current on the floor, and the frequency band of the second resonance is the same as the frequency band of the first resonance; The first resonant current and the second resonant current form a resultant current on the floor, and the first excitation signal and the second excitation signal have a phase difference so that the component of the resultant current along the first side is greater than the component along the second side.

2. The electronic device according to claim 1, wherein: The first resonant current includes a first current and a second current, the first current is parallel to the first side, and the second current is parallel to the second side; The second resonant current includes a third current and a fourth current, the third current is parallel to the first side, and the fourth current is parallel to the second side; The direction of the first current is the same as that of the third current, so that the first current and the third current are superimposed on each other; the direction of the second current is opposite to that of the fourth current, so that the second current and the fourth current at least partially offset each other.

3. The electronic device according to claim 2, wherein: The magnitude of the second current is the same as the magnitude of the fourth current, so that the second current and the fourth current cancel each other out, and the resultant current is parallel to the first side.

4. The electronic device according to any one of claims 1 to 3, characterized in that: Also includes: a first transmission line, one end of the first transmission line being electrically connected to the first radiator; a second transmission line, one end of the second transmission line being electrically connected to the second radiator; a third transmission line, one end of the third transmission line being electrically connected to the other end of the first transmission line and the other end of the second transmission line, and the other end of the third transmission line being electrically connected to the feed source; The feed source is used to feed the first excitation signal to the first radiator through the third transmission line and the first transmission line, and is used to feed the second excitation signal to the second radiator through the third transmission line and the second transmission line.

5. The electronic device according to claim 4, characterized in that The length of the first transmission line is different from the length of the second transmission line, so that the first excitation signal and the second excitation signal have a phase difference.

6. The electronic device according to claim 4, characterized in that Also includes: A phase shifter is provided on the first transmission line or the second transmission line, and is used to adjust the phase of the signal flowing through the first transmission line so that the first excitation signal and the second excitation signal have a phase difference.

7. The electronic device according to claim 4, wherein: Also includes: A matching network is provided between the third transmission line and the feed source, and is used for performing impedance matching on the first radiator and the second radiator.

8. The electronic device according to any one of claims 1 to 3, characterized in that: The first radiator and the second radiator are both arranged parallel to the first side.

9. The electronic device according to claim 8, wherein: The first radiator forms a first IFA antenna, and the first IFA antenna has a first open end; The second radiator forms a second IFA antenna, and the second IFA antenna has a second open end; The first opening end is opposite to the second opening end, and there is a gap between the first opening end and the second opening end.

10. The electronic device according to any one of claims 1 to 3, characterized in that: Also includes: The metal middle frame includes a main body and a metal frame surrounding the periphery of the main body, and the main body forms the floor.

11. The electronic device according to claim 10, wherein: The metal frame includes a first metal branch and a second metal branch, and a gap is formed between the first metal branch and the second metal branch; The first metal branch forms the first radiator, and the second metal branch forms the second radiator.

12. The electronic device according to claim 11, wherein: The metal frame includes a third side and a fourth side, and the third side and the fourth side are connected to form a corner; The first radiator is located on the third side and close to the fourth side, the first radiator includes a first return point, and the first return point is close to the corner; The second radiator is located on the third side and away from the fourth side. The second radiator includes a second return point. The second return point is located at an end of the second radiator away from the first radiator.

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