Electronic device

Abstract

The invention discloses electronic equipment, and relates to the technical field of electronic products. The electronic equipment comprises a frame body, a first inductive device and a second inductive device, the frame body comprises a first fracture, a second fracture and a radiator, the radiator comprises a first resonance arm, a second resonance arm and a third resonance arm which are connected in sequence, the joint of the first resonance arm and the second resonance arm is a first grounding point, and the joint of the second resonance arm and the third resonance arm is a second grounding point. The joint of the second resonance arm and the third resonance arm is a second grounding point; the first grounding point is grounded through a first inductive device, the second grounding point is grounded through a second inductive device, and the first inductive device is coupled with the second inductive device; the first resonance arm comprises a feeding point, under the condition that a feeding signal is accessed to the feeding point, a first resonance mode is excited in the first resonance arm, a second resonance mode is excited in the second resonance arm, a third resonance mode is excited in the third resonance arm, and a fourth resonance mode is excited by the first resonance arm, the second resonance arm and the third resonance arm together.

Description

TECHNICAL FIELD

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

[0002] With the development of mobile technology, in order to bring better user experience to consumers, the appearance design of mobile terminals is increasingly thin, the screen ratio is continuously increasing, and the battery capacity is also continuously increasing. However, under the design trend of high screen ratio, large battery capacity and ultra-thin of mobile terminals, the antenna design space in mobile terminals is continuously compressed. Due to the limitation of physical space, the clearance of the antenna, the thickness size of the antenna body, and the layout space of the antenna tuning circuit are very limited in the traditional antenna design scheme, which leads to narrow antenna bandwidth and difficult to meet the index requirements of antenna efficiency. It can be seen that, in the related art, due to the limitation of the design space of the antenna in the mobile terminal, the antenna in the mobile terminal has the problem of poor performance. SUMMARY

[0003] The embodiments of the present application provide an electronic device, which can solve the problem of poor performance of the antenna in the mobile terminal due to the limitation of the design space of the antenna in the mobile terminal in the related art.

[0004] In a first aspect, an electronic device is provided, including a frame, a first inductive device and a second inductive device, the frame including a first break, a second break and a radiator between the first break and the second break, the radiator including a first resonant arm, a second resonant arm and a third resonant arm connected in sequence, a first ground point at the connection of the first resonant arm and the second resonant arm, and a second ground point at the connection of the second resonant arm and the third resonant arm.

[0005] The first ground point is grounded through the first inductive device, the second ground point is grounded through the second inductive device, and the first inductive device and the second inductive device are coupled.

[0006] The first resonant arm includes a feed point, in the case of connecting a feed signal to the feed point, a first resonant mode is excited in the first resonant arm, a second resonant mode is excited in the second resonant arm, a third resonant mode is excited in the third resonant arm, and a fourth resonant mode is excited in the first resonant arm, the second resonant arm and the third resonant arm.

[0007] In this embodiment, by grounding the first grounding point through a first inductive device and the second grounding point through a second inductive device, and by coupling the first inductive device to the second inductive device, when a feed signal is applied to the feed point, a first resonant mode is excited in the first resonant arm, a second resonant mode is excited in the second resonant arm, a third resonant mode is excited in the third resonant arm, and the first, second, and third resonant arms together excite a fourth resonant mode. That is, during the operation of the antenna, four resonant modes can be excited in the radiator, thereby improving the performance of the antenna. Attached Figure Description

[0008] Figure 1 This is a schematic diagram of the antenna structure in the electronic device of this application;

[0009] Figure 2 This is one of the structural schematic diagrams of the first switching tuning circuit in this application;

[0010] Figure 3 This is the second schematic diagram of the structure of the first switching tuning circuit in this application;

[0011] Figure 4 This is one of the structural schematic diagrams of the second switch tuning circuit in this application;

[0012] Figure 5 This is the second schematic diagram of the structure of the second switching tuning circuit in this application;

[0013] Figure 6 yes Figure 1 The schematic diagram of the mode circuit distribution obtained by simulating the low-frequency antenna in the embodiment;

[0014] Figure 7 yes Figure 1 A schematic diagram of antenna return loss obtained by simulation of the low-frequency antenna in the embodiment;

[0015] Figure 8 yes Figure 1 A schematic diagram comparing antenna efficiency obtained from simulation of the low-frequency antenna in the embodiment. Detailed Implementation

[0016] The technical solutions of the embodiments of this application will be clearly described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application are within the scope of protection of this application.

[0017] The terms "first," "second," etc., used in this application are used to distinguish similar objects and not to describe a specific order or sequence. It should be understood that such terms can be used interchangeably where appropriate so that embodiments of this application can be implemented in orders other than those illustrated or described herein, and the objects distinguished by "first" and "second" are generally of the same class, not limited in number; for example, the first object can be one or more. Furthermore, "or" in this application indicates at least one of the connected objects. For example, the scope of protection for "A or B" covers at least three scenarios: Scenario 1: including A but not B; Scenario 2: including B but not A; Scenario 3: including both A and B. In addition, the terms "A and / or B," "at least one of A and B," and "at least one of A or B" also cover at least the above three scenarios. The character " / " generally indicates that the preceding and following objects are in an "or" relationship.

[0018] The electronic device provided in the embodiments of this application will be described in detail below with reference to the accompanying drawings and through some embodiments and application scenarios.

[0019] Please see Figure 1 This application provides an electronic device, including a frame 100, a first inductive device 200, and a second inductive device 300. The frame 100 includes a first break 110, a second break 120, and a radiator 130 located between the first break 110 and the second break 120. The radiator 130 includes a first resonant arm 131, a second resonant arm 132, and a third resonant arm 133 connected in sequence. The connection point between the first resonant arm 131 and the second resonant arm 132 is a first grounding point 134, and the connection point between the second resonant arm 132 and the third resonant arm 133 is a second grounding point 135.

[0020] The first grounding point 134 is grounded through the first inductive device 200, the second grounding point 135 is grounded through the second inductive device 300, and the first inductive device 200 is coupled to the second inductive device 300;

[0021] The first resonant arm 131 includes a feed point 137. When a feed signal is connected to the feed point 137, a first resonant mode is excited in the first resonant arm 131, a second resonant mode is excited in the second resonant arm 132, a third resonant mode is excited in the third resonant arm 133, and the first resonant arm 131, the second resonant arm 132 and the third resonant arm 133 together excite a fourth resonant mode.

[0022] The frame 100 can be the middle frame of an electronic device, and the radiator 130 is the area of ​​the frame 100 located between the first break 110 and the second break 120 within the middle frame.

[0023] The radiator 130 can be used as a radiator of various antennas. For example, in some embodiments of the present application, the radiator 130 can be used as a radiator of a low-frequency antenna 400.

[0024] The first inductive device 200 and the second inductive device 300 can be equivalent to inductors. Specifically, the first inductive device 200 can include an inductive electrical element, or the first inductive device 200 can be an inductive device equivalent to a metal strip structure. Correspondingly, the second inductive device 300 can include an inductive electrical element, or the second inductive device 300 can be an inductive device equivalent to a metal strip structure.

[0025] Please refer to Figure 1 In some embodiments of the present application, the first resonant arm 131 is located between the second resonant arm 132 and the first break 110, and the feed point 137 is located at one end of the first resonant arm 131 close to the first break 110.

[0026] In some embodiments of the present application, when the feed point 137 is connected to a feed signal, the antenna to which the radiator 130 belongs has the following characteristics:

[0027] The first resonant arm 131 excites a first resonant mode, which generates a large current at the first inductive device 200. The large current at the first inductive device 200 can generate a strong magnetic field on the equivalent inductance of the first inductive device 200.

[0028] Since the first inductive device 200 is coupled to the second inductive device 300, the strong magnetic field generated on the equivalent inductance of the first inductive device 200 can be coupled to the second inductive device 300 through magnetic field coupling, thereby generating a large current in the second inductive device 300.

[0029] The large current generated in the second inductive device 300 can excite the third resonant arm 133, so that the third resonant arm 133 generates the third resonant mode described above.

[0030] Under the current excitation of the first inductive device 200 and the second inductive device 300, a reverse current can be generated in the second resonant arm 132. The reverse currents in the second resonant arm 132 can cancel each other out.

[0031] In this embodiment, the first grounding point 134 is grounded through the first inductive device 200, the second grounding point 135 is grounded through the second inductive device 300, and the first inductive device 200 is coupled with the second inductive device 300. Thus, when the feed point 137 is connected with a feed signal, the first resonant mode is excited in the first resonant arm 131, the second resonant mode is excited in the second resonant arm 132, the third resonant mode is excited in the third resonant arm 133, and the fourth resonant mode is excited in the first resonant arm 131, the second resonant arm 132 and the third resonant arm 133. That is, four resonant modes can be excited in the radiator 130 during the operation of the antenna, thereby improving the performance of the antenna.

[0032] Optionally, the first resonant arm 131 and the third resonant arm 133 are perpendicular.

[0033] In this embodiment, the first resonant arm 131 and the second resonant arm 132 are located in two adjacent sides of the frame 100. Since the two adjacent sides of the frame 100 are usually perpendicular to each other, the first resonant arm 131 and the third resonant arm 133 can be perpendicular.

[0034] In this embodiment, since the first resonant arm 131 and the third resonant arm 133 are perpendicular, the currents in the first resonant arm 131 and the third resonant arm 133 are orthogonal, thereby facilitating the superposition and enhancement of the first resonant mode and the second resonant mode, and further improving the performance of the antenna.

[0035] Optionally, as shown in Figure 1 , the first resonant arm 131 and the second resonant arm 132 are located in the side frame of the frame 100, and the third resonant arm 133 is located in the bottom frame of the frame 100.

[0036] As shown in Figure 1 , the first resonant arm 131 and the second resonant arm 132 are located in the same side frame of the frame 100. The first resonant arm 131 is close to the mainboard area 600 of the electronic device at one end of the first break 110. The feed source 420 can be a radio frequency circuit inside the mainboard. Thus, the feed point 137 can be arranged close to the first break 110, so that the feed point 137 is adjacent to the feed source 420 inside the mainboard, thereby shortening the transmission path between the feed source 420 and the feed point 137, and reducing the transmission loss in the signal transmission process.

[0037] In this embodiment, by arranging the first resonant arm 131 and the second resonant arm 132 on the side frame of the frame 100, and arranging the third resonant arm 133 on the bottom frame of the frame 100, the first resonant arm 131 can be conveniently connected to the feed 420 in the mainboard of the electronic device.

[0038] Optionally, the radiator 130 is a radiator of a low-frequency antenna 400, the first resonant mode is a quarter-wavelength resonant mode of the low-frequency frequency band, the second resonant mode is a half-wavelength resonant mode of the low-frequency frequency band, the third resonant mode is a quarter-wavelength resonant mode of the low-frequency frequency band, and the fourth resonant mode is a one-wavelength resonant mode of the low-frequency frequency band.

[0039] The low-frequency frequency band is the operating frequency band of the low-frequency antenna 400, and the frequency range of the low-frequency frequency band is 700 MHz to 960 MHz.

[0040] The first resonant mode being a quarter-wavelength resonant mode of the low-frequency frequency band can mean that the first resonant arm 131 is excited to a quarter-wavelength mode when the feed point 137 is connected to a low-frequency feed signal. Correspondingly, the second resonant mode being a half-wavelength resonant mode of the low-frequency frequency band can mean that the second resonant arm 132 is excited to a half-wavelength mode when the feed point 137 is connected to a low-frequency feed signal. The third resonant mode being a quarter-wavelength resonant mode of the low-frequency frequency band can mean that the third resonant arm 133 is excited to a quarter-wavelength mode when the feed point 137 is connected to a low-frequency feed signal. The fourth resonant mode being a one-wavelength resonant mode of the low-frequency frequency band can mean that the first resonant arm 131, the second resonant arm 132, and the third resonant arm 133 are collectively excited to a one-wavelength resonant mode when the feed point 137 is connected to a low-frequency feed signal.

[0041] In this embodiment, by arranging the radiator 130 as a radiator of a low-frequency antenna 400, the first resonant mode as a quarter-wavelength resonant mode of the low-frequency frequency band, the second resonant mode as a half-wavelength resonant mode of the low-frequency frequency band, the third resonant mode as a quarter-wavelength resonant mode of the low-frequency frequency band, and the fourth resonant mode as a one-wavelength resonant mode of the low-frequency frequency band, four resonant modes can be excited in the radiator 130 when the feed point 137 is connected to a low-frequency feed signal.

[0042] Optionally, a length of the first resonant arm 131 matches a quarter of a wavelength corresponding to a low-frequency frequency band, a length of the second resonant arm 132 matches a half of the wavelength corresponding to the low-frequency frequency band, and a length of the third resonant arm 133 matches the quarter of the wavelength corresponding to the low-frequency frequency band.

[0043] The length of the first resonant arm 131 matching the quarter of the wavelength corresponding to the low-frequency frequency band can mean that the length of the first resonant arm 131 is equal to a quarter of a medium wavelength corresponding to a center frequency point of the low-frequency frequency band, or the length of the first resonant arm 131 is a value near the quarter of the medium wavelength corresponding to the center frequency point of the low-frequency frequency band. For example, in some embodiments of the present application, the length of the first resonant arm 131 is 46 mm, 43 mm, or 49 mm, etc. Correspondingly, the length of the second resonant arm 132 matching the half of the wavelength corresponding to the low-frequency frequency band can mean that the length of the second resonant arm 132 is equal to a half of a medium wavelength corresponding to a center frequency point of the low-frequency frequency band, or the length of the second resonant arm 132 is a value near the half of the medium wavelength corresponding to the center frequency point of the low-frequency frequency band. For example, in some embodiments of the present application, the length of the second resonant arm 132 is 62 mm, 60 mm, or 64 mm, etc. The length of the third resonant arm 133 matching the quarter of the wavelength corresponding to the low-frequency frequency band can mean that the length of the third resonant arm 133 is equal to a quarter of a medium wavelength corresponding to a center frequency point of the low-frequency frequency band, or the length of the third resonant arm 133 is a value near the quarter of the medium wavelength corresponding to the center frequency point of the low-frequency frequency band. For example, in some embodiments of the present application, the length of the third resonant arm 133 is 38 mm, 39 mm, or 40 mm, etc.

[0044] In this embodiment, by matching the length of the first resonant arm 131 with the quarter of the wavelength corresponding to the low-frequency frequency band, matching the length of the second resonant arm 132 with the half of the wavelength corresponding to the low-frequency frequency band, and matching the length of the third resonant arm 133 with the quarter of the wavelength corresponding to the low-frequency frequency band, in the case of connecting the low-frequency frequency band feeding signal to the feeding point 137, a quarter-wave mode can be excited in the first resonant arm 131, a half-wave mode can be excited in the second resonant arm 132, a quarter-wave mode can be excited in the third resonant arm 133, and the first resonant arm 131, the second resonant arm 132, and the third resonant arm 133 can collectively excite a one-wave mode.

[0045] Optionally, the low-frequency antenna 400 comprises a feed source 420 and a first switch tuning circuit 410, and the feed point 137 is electrically connected with the feed source 420 through the first switch tuning circuit 410.

[0046] The first switch tuning circuit 410 comprises at least two first sub-tuning circuits 411, and the first switch tuning circuit 410 has at least two working modes corresponding to the at least two first sub-tuning circuits 411.

[0047] The first switch tuning circuit 410 can further comprise a first switch element 412 to control the switching of the at least two first sub-tuning circuits 411 through the first switch element 412, so as to realize the switching of the working mode of the first switch tuning circuit 410. The first sub-tuning circuit 411 can be various common tuning circuits, and the first sub-tuning circuit can be a circuit comprising at least one of a capacitor and an inductor. When the first sub-tuning circuit comprises two or more elements, the elements can be connected in series and in parallel, and can be set as needed.

[0048] For example, please refer to Figure 2 In some embodiments of the present application, the first switch tuning circuit 410 further comprises a first inductor 413 and a first loading element 414, wherein the first loading element 414 is a capacitor or an inductor, the feed source 420 is electrically connected with the feed point 137 through the first loading element 414, and the feed point 137 is further grounded through the first inductor 413. The first switch element 412 is a four-blade four-pole switch, the first switch tuning circuit 410 comprises four first sub-tuning circuits 411, the first switch element 412 comprises a first movable terminal and four first fixed terminals, the first movable terminal is grounded, the four first fixed terminals correspond to the four first sub-tuning circuits 411 one by one, and the first fixed terminal is electrically connected with the feed point 137 through the corresponding first sub-tuning circuit 411. In this way, the on-off state between the first movable terminal and each first fixed terminal can be controlled to realize the switching of the mode of the first switch tuning circuit 410.

[0049] For another example, please refer to Figure 3In some embodiments of the present application, the first switch tuning circuit 410 further includes a first inductor 413, a first loading device 414 and a second loading device 415, wherein the first loading device 414 is a capacitor or an inductor, the second loading device 415 is a capacitor or an inductor, the feed source 420 is electrically connected to the feed point 137 through the first loading device 414, and the feed point 137 is grounded through the first inductor 413. The first switch 412 is a four-pole four-throw switch, the first switch tuning circuit 410 includes four first sub-tuning circuits 411, the first switch 412 includes a first movable terminal and four first fixed terminals, the first movable terminal is electrically connected to the feed point 137, the four first fixed terminals correspond to the four first sub-tuning circuits 411 one by one, and the first fixed terminal is grounded through the corresponding first sub-tuning circuit 411, and the feed source 420 is further electrically connected to one of the first fixed terminals of the first switch 412 through the second loading device 415. In this way, the mode of the first switch tuning circuit 410 can be switched by controlling the conduction state between the first movable terminal and each first fixed terminal.

[0050] In some embodiments of the present application, the working frequency band of the low-frequency antenna 400 can be switched by switching the working mode of the first switch tuning circuit 410. For example, the low-frequency frequency band can include the following sub-frequency bands: B5 frequency band, B8 frequency band and B28 frequency band. By switching the working mode of the first switch tuning circuit 410, the radiator 130 can resonate at different sub-frequency bands. In this way, the low-frequency antenna 400 has good antenna performance in each sub-frequency band.

[0051] In this embodiment, the low-frequency antenna 400 includes a feed source 420 and a first switch tuning circuit 410, the feed point 137 is electrically connected to the feed source 420 through the first switch tuning circuit 410, the first switch tuning circuit 410 includes at least two first sub-tuning circuits 411, and the first switch tuning circuit 410 has at least two working modes corresponding to the at least two first sub-tuning circuits 411. In this way, the resonant frequency point of the radiator 130 can be tuned to adapt to the current working frequency band of the low-frequency antenna 400 by switching the working mode of the first switch tuning circuit 410, thereby improving the antenna performance of the low-frequency antenna 400.

[0052] Optionally, the low-frequency antenna 400 further includes a second switch tuning circuit 430, and the third resonant arm 133 is provided with a tuning point 136 at one end away from the second resonant arm 132, and the tuning point 136 is grounded through the second switch tuning circuit 430.

[0053] The second switch tuning circuit 430 includes at least two second sub-tuning circuits 431, and the second switch tuning circuit 430 has at least two working modes corresponding to the at least two second sub-tuning circuits 431.

[0054] The second switch tuning circuit 430 can further include a second switch 432 to control switching of the at least two second sub-tuning circuits 431 through the second switch 432, so as to switch the working mode of the second switch tuning circuit 430. The second sub-tuning circuit 431 can be various common tuning circuits, and the second sub-tuning circuit can be a circuit including at least one of a capacitor and an inductor. When the second sub-tuning circuit includes two or more devices, the devices included therein can be connected in series and in parallel, and can be set as needed.

[0055] For example, referring to Figure 4 In some embodiments of the present application, the second switch tuning circuit 430 further includes a second inductor 433, the second switch 432 is a four-blade four-pole switch, the second switch tuning circuit 430 includes four second sub-tuning circuits 431, the second switch 432 includes one second movable terminal and four second fixed terminals, the second movable terminal is grounded, the four second fixed terminals correspond to the four second sub-tuning circuits 431 one by one, and the second fixed terminal is electrically connected to the tuning point 136 through the corresponding second sub-tuning circuit 431. In this way, the on-off state between the second movable terminal and each second fixed terminal can be controlled to switch the mode of the second switch tuning circuit 430.

[0056] For example, referring to Figure 5 In some embodiments of the present application, the second switch tuning circuit 430 further includes a second inductor 433, the second switch 432 is a four-blade four-pole switch, the second switch tuning circuit 430 includes four second sub-tuning circuits 431, the second switch 432 includes one second movable terminal and four second fixed terminals, the second movable terminal is electrically connected to the tuning point 136, the four second fixed terminals correspond to the four second sub-tuning circuits 431 one by one, and the second fixed terminal is grounded through the corresponding second sub-tuning circuit 431. In this way, the on-off state between the second movable terminal and each second fixed terminal can be controlled to switch the mode of the second switch tuning circuit 430.

[0057] In some embodiments of the present application, the working frequency band of the low-frequency antenna 400 can be switched by switching the working mode of the second switch tuning circuit 430. For example, the low-frequency frequency band can include the following sub-frequency bands: B5 frequency band, B8 frequency band and B28 frequency band. By switching the working mode of the second switch tuning circuit 430, the radiator 130 can resonate at different sub-frequency bands. In this way, the low-frequency antenna 400 has good antenna performance in each sub-frequency band.

[0058] In this embodiment, the low-frequency antenna 400 further includes a second switch tuning circuit 430, one end of the third resonant arm 133 away from the second resonant arm 132 is provided with a tuning point 136, and the tuning point 136 is grounded through the second switch tuning circuit 430. The second switch tuning circuit 430 includes at least two second sub-tuning circuits 431, and the second switch tuning circuit 430 has at least two working modes corresponding to the at least two second sub-tuning circuits 431. In this way, the resonant frequency point of the radiator 130 can be tuned to adapt to the current working frequency band of the low-frequency antenna 400 by switching the working mode of the second switch tuning circuit 430. Thus, the antenna performance of the low-frequency antenna 400 is improved.

[0059] Optionally, referring to Figure 1 , the first inductive device 200 and the second inductive device 300 are respectively ground wires of the frame 100.

[0060] In some embodiments of the present application, the physical length of the ground wire as the first inductive device 200 can be 15 mm, wherein the ground wire is equivalent to an inductive ground, and the length of the ground wire is proportional to the inductance value. Correspondingly, the physical length of the ground wire as the second inductive device 300 can be 19 mm, wherein the ground wire is equivalent to an inductive ground, and the length of the ground wire is proportional to the inductance value. It should be noted that the length of the ground wire in the embodiments of the present application is only an example, and in fact, the length of the ground wire can be set as needed, for example, in another embodiment of the present application, the physical length of the ground wire as the first inductive device 200 can be 16 mm. Correspondingly, the physical length of the ground wire as the second inductive device 300 can be 18 mm.

[0061] In Figure 1 embodiments, the resonance of the first resonant arm 131 in the low-frequency frequency band can be effectively excited by adjusting the working mode of the first switch tuning circuit 410, wherein the first inductive device 200 and the second inductive device 300 are equivalent to inductors.

[0062] The resonance of the first resonant arm 131 at the low frequency band generates a large current at the first inductive device 200, as shown in the following formula: Figure 6 wherein, Figure 6 3 represents the first resonant arm 131, 4 represents the second resonant arm 132, 5 represents the first inductive device 200, 6 represents the second inductive device 300, 7 represents the third resonant arm 133, a represents the feeding point 137, b represents the first grounding point 134, c represents the second grounding point 135, and d represents the tuning point 136.

[0063] The large current generated at the first inductive device 200 generates a strong magnetic field on the equivalent inductance of the first inductive device 200.

[0064] The strong magnetic field of the first inductive device 200 is coupled to the second inductive device 300 through the magnetic field, thereby generating a large current on the second inductive device 300.

[0065] The large current of the second inductive device 300 excites the third resonant arm 133, so that the second inductive device 300 generates a 1 / 4 wavelength resonance.

[0066] The second resonant arm 132 generates a reverse λ / 2 mode current under the excitation of the currents of the first inductive device 200 and the second inductive device 300.

[0067] By adjusting the working mode of the second switch tuning circuit 430, the third resonant arm 133 can be made to resonate at the low frequency band.

[0068] In addition, by tuning the first switch tuning circuit 410 and the second switch tuning circuit 430, the first resonant arm 131 and the third resonant arm 133 can be made to fall in the B5 frequency band, the B8 frequency band or the B28 frequency band at the same time; the 1 / 2 wavelength mode currents of the second resonant arm 132 are reversed and offset each other, and the 1 / 4 wavelength mode currents of the first resonant arm 131 and the third resonant arm 133 are orthogonally superimposed and enhanced, thereby being beneficial to improving the antenna performance of the low frequency antenna 400.

[0069] One of the antenna schemes in the related art is to make the area where the second resonant arm 132 in Figure 1 is grounded as a whole. In order to improve the antenna performance, the area where the second resonant arm 132 in Figure 1A small circuit board is installed at the acoustic cavity 500, and the second resonant arm 132 is connected to the small circuit board to be matched and tuned through the matching circuit in the small circuit board. Simultaneously, a coaxial cable is needed to connect the small circuit board to the main board located at the top of the electronic device. While this arrangement can improve antenna performance to some extent, it reduces the size of the acoustic cavity 500 because the small circuit board occupies space in the area where the acoustic cavity 500 is located. Furthermore, the coaxial cable connection between the small circuit board and the main board requires space in both the acoustic cavity 500 and the battery compartment 700, further reducing the size of the acoustic cavity 500 and the battery capacity.

[0070] And adopt this application Figure 1 In the embodiment shown, since there is no need to set a small circuit board at the sound cavity 500, nor is there a need to set a coaxial cable to connect the small circuit board, it is beneficial to increase the volume of the sound cavity 500, increase the battery capacity, and save coaxial cable.

[0071] Figure 7 This is a schematic diagram of the antenna return loss of the low-frequency antenna 400 in the embodiments of this application. Figure 8 This is a schematic diagram comparing the total radiation efficiency of the low-frequency antenna 400 in the embodiments of this application. Figure 8 The solid line in the middle represents this application. Figure 1 Antenna efficiency of the low-frequency antenna 400 in the illustrated embodiment in the B5, B8, and B28 bands. Figure 8 The dashed lines represent the antenna efficiency of the traditional side-mounted low-frequency antenna 400 scheme in the B5, B8, and B28 bands. A comparison shows that this application... Figure 1 The low-frequency antenna 400 in the illustrated embodiment has a significantly wider efficiency bandwidth in the B5, B8, and B28 bands than the traditional solution, with efficiency improved by 1 dB to 1.5 dB in the low-frequency band.

[0072] In this embodiment, by making the first inductive device 200 and the second inductive device 300 the grounding components of the frame 100 respectively, the inductive grounding of the first grounding point 134 and the second grounding point 135 can be achieved.

[0073] Optionally, the first sensing device 200 and the second sensing device 300 are steel sheets.

[0074] One end of the steel sheet can be welded to the corresponding grounding point, and the other end of the steel sheet can be welded to the main ground of the electronic device.

[0075] This embodiment and Figure 1 The difference in the illustrated embodiment is that steel sheets are used instead of... Figure 1The grounding material in the illustrated embodiment can also be obtained Figure 1 The illustrated embodiment has the same effect.

[0076] In this embodiment, by making the first inductive device 200 and the second inductive device 300 steel sheets respectively, the inductive grounding of the first grounding point 134 and the second grounding point 135 can be achieved.

[0077] Optionally, the first inductive device 200 includes a first circuit board, on which traces or inductance are provided;

[0078] The second inductive device 300 includes a second circuit board on which traces or inductance are provided.

[0079] It is understandable that the first and second circuit boards mentioned above only serve as carriers for the traces or inductors mounted on them; that is, the first and second circuit boards do not need to be connected to other circuit boards such as the motherboard in electronic devices via traces.

[0080] The traces in the first circuit board can be traces formed by copper pouring on the first circuit board. When traces are provided on the first circuit board, one end of the trace is connected to the first ground point 134, and the other end of the trace is connected to the main ground. In this case, the trace can be equivalent to an inductor and serve as the first inductive device 200. Alternatively, when an inductor is provided on the first circuit board, one end of the inductor is connected to the first ground point 134, and the other end of the inductor is connected to the main ground. In this case, the inductor serves as the first inductive device 200.

[0081] The traces in the second circuit board can be traces formed by copper pouring on the second circuit board. When traces are provided on the second circuit board, one end of the trace is connected to the second ground point 135, and the other end of the trace is connected to the main ground. In this case, the trace can be equivalent to an inductor and serve as the second inductive device 300. Alternatively, when an inductor is provided on the second circuit board, one end of the inductor is connected to the second ground point 135, and the other end of the inductor is connected to the main ground. In this case, the inductor serves as the second inductive device 300.

[0082] This embodiment and Figure 1 The difference in the illustrated embodiment is that a first circuit board and a second circuit board are used instead. Figure 1 The grounding material in the illustrated embodiment can also be obtained Figure 1 The illustrated embodiment has the same effect.

[0083] In this embodiment, by making the first inductive device 200 and the second inductive device 300 be a first circuit board and a second circuit board respectively, the inductive grounding of the first grounding point 134 and the second grounding point 135 can be achieved.

[0084] The embodiments of the present application are described above with reference to the accompanying drawings, but the present application is not limited to the specific embodiments described above, which are merely illustrative but not restrictive, and a person of ordinary skill in the art can make many forms under the inspiration of the present application without departing from the scope of the present application and the scope protected by the claims.

Claims

1. An electronic device, comprising: The application relates to a frame, a first inductive device and a second inductive device, the frame comprising a first fracture, a second fracture and a radiator between the first fracture and the second fracture, the radiator comprising a first resonant arm, a second resonant arm and a third resonant arm connected in sequence, the connection between the first resonant arm and the second resonant arm being a first grounding point, and the connection between the second resonant arm and the third resonant arm being a second grounding point. The first grounding point is grounded through the first inductive device, the second grounding point is grounded through the second inductive device, and the first inductive device and the second inductive device are coupled. The first resonant arm comprises a feeding point, in the case that a feeding signal is connected to the feeding point, a first resonant mode is excited in the first resonant arm, a second resonant mode is excited in the second resonant arm, a third resonant mode is excited in the third resonant arm, and a fourth resonant mode is excited in the first resonant arm, the second resonant arm and the third resonant arm. The first resonant arm and the third resonant arm are perpendicular.

2. The electronic device of claim 1, wherein, The first resonant arm and the second resonant arm are located on the side frame of the frame, and the third resonant arm is located on the bottom frame of the frame.

3. The electronic device of claim 2, wherein, The radiator is a radiator of a low-frequency antenna, the first resonant mode is a quarter-wave resonant mode of a low-frequency frequency band, the second resonant mode is a half-wave resonant mode of the low-frequency frequency band, the third resonant mode is a quarter-wave resonant mode of the low-frequency frequency band, and the fourth resonant mode is a one-wave resonant mode of the low-frequency frequency band.

4. The electronic device of claim 1, wherein, The length of the first resonant arm matches a quarter of the wavelength corresponding to the low-frequency frequency band, the length of the second resonant arm matches a half of the wavelength corresponding to the low-frequency frequency band, and the length of the third resonant arm matches a quarter of the wavelength corresponding to the low-frequency frequency band.

5. The electronic device of claim 4, wherein, The low-frequency antenna comprises a feed source and a first switch tuning circuit, and the feeding point is electrically connected to the feed source through the first switch tuning circuit.

6. The electronic device of claim 4, wherein, The first switch tuning circuit comprises at least two first sub-tuning circuits, and the first switch tuning circuit has at least two working modes corresponding to the at least two first sub-tuning circuits. The low-frequency antenna further comprises a second switch tuning circuit, and a tuning point is arranged at the end of the third resonant arm away from the second resonant arm, and the tuning point is grounded through the second switch tuning circuit.

7. The electronic device of claim 6, wherein, The second switch tuning circuit comprises at least two second sub-tuning circuits, and the second switch tuning circuit has at least two working modes corresponding to the at least two second sub-tuning circuits. The first inductive device and the second inductive device are respectively grounding wires of the frame.

8. The electronic device according to any one of claims 1 to 7, wherein The first inductive device and the second inductive device are respectively steel sheets.

9. The electronic device according to any one of claims 1 to 7, wherein The first inductive device comprises a first circuit board, and the first circuit board is provided with a wire or an inductor.

10. The electronic device according to any one of claims 1 to 7, wherein The second inductive device comprises a second circuit board, and the second circuit board is provided with a wire or an inductor. ​

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