Electronic device

Abstract

The present application relates to the technical field of electronic products, and discloses an electronic device. The electronic device comprises: a first folding portion and a second folding portion which are rotatably connected; the first folding portion comprises a first frame and a first antenna, the first antenna comprises a feed source and a first radiator which is arranged on the first frame, and the feed source is connected to the first radiator by means of a first tuning circuit; the second folding portion comprises a second frame and a second antenna, the second antenna comprises a second radiator and a third radiator which are arranged on the second frame, and the second radiator and the third radiator are coupled by means of a slit; when the electronic device is in a folded state, the first radiator and the second radiator are oppositely arranged at a first interval, and the second radiator is coupled to the third radiator; a second tuning circuit is connected between the third radiator and a ground terminal; the length of the slit is smaller than a preset value, or a capacitive unit is provided at the slit.

Description

electronic devices

[0001] Cross-reference to related applications

[0002] This application claims priority to Chinese Patent Application No. 202411434668.7, filed in China on October 15, 2024, the entire contents of which are incorporated herein by reference. Technical Field

[0003] This application belongs to the field of electronic product technology, and specifically relates to an electronic device. Background Technology

[0004] Current foldable screen electronic devices feature extremely thin and light designs with large battery capacities, resulting in exceptionally compact antenna layouts and increasingly smaller antenna clearances. However, the antenna clearance, antenna body thickness, and available space for antenna tuning circuitry all affect the antenna's bandwidth and efficiency. Therefore, how to design antennas within the limited space of electronic devices and improve antenna performance is a pressing technical problem that needs to be solved. Summary of the Invention

[0005] The purpose of this application is to provide an electronic device that can solve the problem of how to design an antenna and improve its performance within a limited space.

[0006] In a first aspect, embodiments of this application provide an electronic device, including: a first folding portion and a second folding portion, wherein the first folding portion and the second folding portion are rotatably connected;

[0007] The first folded portion includes a first frame and a first antenna. The first antenna includes a feed and a first radiator disposed on the first frame. The feed and the first radiator are connected through a first tuning circuit.

[0008] The second folded portion includes a second frame and a second antenna. The second antenna includes a second radiator and a third radiator disposed on the second frame, and the second radiator and the third radiator are coupled through a gap.

[0009] When the electronic device is in a folded state, the first radiator and the second radiator are disposed opposite each other with a first interval, and the second radiator is coupled to the third radiator;

[0010] A second tuning circuit is connected between the third radiator and the ground terminal;

[0011] The length of the fracture is less than a preset value, or a resilient unit is provided at the fracture.

[0012] In this embodiment, the electronic device includes a first folded portion and a second folded portion, which are rotatably connected. The first folded portion includes a first frame and a first antenna. The first antenna includes a feed and a first radiator disposed on the first frame, with the feed and the first radiator connected via a first tuning circuit. The second folded portion includes a second frame and a second antenna. The second antenna includes a second radiator and a third radiator disposed on the second frame, with the second and third radiators coupled via a gap. When the electronic device is in a folded state, the first and second radiators are positioned opposite each other with a first interval, and the second and third radiators are coupled. Furthermore, by setting the length of the gap to be less than a preset value, or by providing a capacitive element at the gap, the capacitance value at the gap can be increased. Simultaneously, by connecting the second tuning circuit to the third radiator, the antenna can operate in the B5, B8, and B28 frequency bands and its efficiency can be improved by tuning the switches on the first and second tuning circuits. Thus, antenna performance can be improved within a limited space. Attached Figure Description

[0013] Figure 1 shows one of the structural schematic diagrams of an electronic device according to an embodiment of this application;

[0014] Figure 2 shows a second schematic diagram of the structure of the electronic device according to an embodiment of this application;

[0015] Figure 3 shows one of the structural schematic diagrams of the capacitive unit according to an embodiment of this application;

[0016] Figure 4 shows a second schematic diagram of the structure of the capacitive unit according to an embodiment of this application;

[0017] Figure 5 shows a third schematic diagram of the structure of the capacitive unit according to an embodiment of this application;

[0018] Figure 6 shows one of the circuit structure schematic diagrams of the first tuning circuit according to an embodiment of this application;

[0019] Figure 7 shows a second schematic diagram of the circuit structure of the first tuning circuit according to an embodiment of this application;

[0020] Figure 8 shows one of the circuit structure schematic diagrams of the second tuning circuit according to an embodiment of this application;

[0021] Figure 9 shows a second schematic diagram of the circuit structure of the second tuning circuit according to an embodiment of this application;

[0022] Figure 10 shows the equivalent circuit diagram of the second antenna in an embodiment of this application;

[0023] Figure 11 shows a schematic diagram of the electronic device structure of the relevant technology according to an embodiment of this application;

[0024] Figure 12 shows a schematic diagram of antenna return loss according to an embodiment of this application;

[0025] Figure 13 shows a schematic diagram comparing the antenna efficiency of embodiments of this application;

[0026] Figure 14 shows a third schematic diagram of the structure of an electronic device according to an embodiment of this application.

[0027] Explanation of reference numerals in the attached drawings: 0-Feed source; 1-First frame; 11-First border; de-First radiator; 12-Second border; 2-Second frame; 21-Third border; 22-Fourth border; ab-Second radiator; bc-Third radiator; 3-First tuning circuit; 4-Second tuning circuit; 50-Capacitor; 51-First coupling structure; 52-Second coupling structure; 53-Third coupling structure; 54-Fourth coupling structure; 55-Fifth coupling structure; 56-Sixth coupling structure; 6-First battery housing area; 7-Hinge mechanism; 8-Second battery housing area. Detailed Implementation

[0028] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0029] The terms "first," "second," etc., used in the specification and claims of this application are used to distinguish similar objects and not to describe a specific order or sequence. It should be understood that such use of data can be interchanged where appropriate so that embodiments of this application can be implemented in orders other than those illustrated or described herein. Furthermore, in the specification and claims, "and / or" indicates at least one of the connected objects, and the character " / " generally indicates that the preceding and following objects are in an "or" relationship.

[0030] The control method provided in this application will be described in detail below with reference to the accompanying drawings, through specific embodiments and application scenarios.

[0031] Please refer to Figures 1 to 10. An embodiment of this application provides an electronic device, including: a first folding portion and a second folding portion, which are rotatably connected to each other.

[0032] The first folded portion includes a first frame 1 and a first antenna. The first antenna includes a feed 0 and a first radiator de disposed on the first frame 1. The feed 0 and the first radiator de are connected through a first tuning circuit 3.

[0033] The second folded portion includes a second frame 2 and a second antenna. The second antenna includes a second radiator ab and a third radiator bc disposed on the second frame 2. The second radiator ab and the third radiator bc are coupled together through a gap b.

[0034] When the electronic device is in a folded state, the first radiator de and the second radiator ab are arranged opposite each other with a first interval, and the second radiator ab is coupled to the third radiator bc.

[0035] Among them, the third radiator bc is connected to the ground terminal by a second tuning circuit 4;

[0036] The length of the fracture b is less than the preset value, or a resilient unit is provided at the fracture b.

[0037] Optionally, the first folded portion is the main body of the electronic device, and the second folded portion is the secondary body of the electronic device.

[0038] It should be noted that the feed source 0 is connected to the first radiator de through the first tuning circuit 3, and the connection position between the first tuning circuit 3 and the first radiator de is not limited. Meanwhile, the connection position between the second tuning circuit 4 and the third radiator bc is located between the capacitive unit and the gap c, or between gap b and gap c.

[0039] It should be noted that the positions of the first frame 1 and the second frame 2 in Figures 1 and 2 are only for illustrating the relative positional relationship of the first and second antennas, and are not actual product structure diagrams. In the actual product structure diagram, when the electronic device is in a folded state, the first folded part and the second folded part overlap, and the first and second antennas are close to each other; as shown in Figure 14, when the electronic device is in an unfolded state, the first and second antennas are far apart.

[0040] Optionally, in an application example where the coupling capacitance at the break point b is increased by reducing the width of the break point b, the preset value is less than 0.8 mm, that is, the length of the break point b should be less than 0.8 mm.

[0041] In this embodiment, by setting the length of the slit b to be less than a preset value, or by placing a capacitive element at the slit b, the capacitance value at the slit b can be increased. Simultaneously, the second tuning circuit 4 is connected to the third radiator bc. Thus, by tuning the switches on the first tuning circuit 3 and the second tuning circuit 4, the antenna can operate in the B5, B8, or B28 frequency band, improving antenna efficiency. In this way, antenna performance can be improved within a limited space.

[0042] In practical implementation, the antenna feed, located at feed source 0 in the diagram, effectively excites a low-band (LB) resonance (700-960MHz) in the first folded section by tuning the inductor and capacitor on the first tuning circuit 3. This resonance is radiated by the first radiator de. When the electronic device is in the folded state, the positions of the second radiator ab and the first radiator de overlap, meaning they are parallel and opposite to each other with a first interval. The magnetic field of the first radiator de couples to the second radiator ab, causing it to generate a low-band (LB) resonance (700-960MHz) through the inductor and capacitor on the second tuning circuit 4. Thus, by tuning the switches on the first tuning circuit 3 and the second tuning circuit 4, the resonances of the first and second antennas can simultaneously fall within the B5, B8, or B28 frequency bands.

[0043] Figure 12 shows a schematic diagram of the antenna return loss of the electronic device provided in this application embodiment. Figure 13 shows a schematic diagram comparing the antenna efficiency of the electronic device provided in this application embodiment with that of a conventional solution. In the figures, from left to right, the solid lines represent the antenna efficiencies of the conventional antenna solutions B28, B5, and B8, while the dashed lines represent the antenna efficiencies of the present application embodiment B28, B5, and B8. The comparison figures show that the efficiency bandwidth of the present application embodiment in the B5, B8, and B28 frequency bands is significantly higher than that of the conventional solution, with an efficiency improvement of 1-1.5 dB.

[0044] Figure 11 shows a schematic diagram of the traditional scheme. As can be seen from Figure 11, the traditional scheme does not have a structure design to increase the coupling capacitor at the gap b, and the second tuning circuit 4 is connected to the second radiator ab.

[0045] Optionally, the first tuning circuit 3 is an active single-pole single-throw (Q-SPST) circuit topology, including four single-pole single-throw switches. Specifically, as shown in Figure 6, the first tuning circuit 3 includes: a second capacitor C2 connected between the feed 0 and the first radiator de; a first inductor L1 connected between the first radiator de and the ground terminal; and a first module connected in parallel with the first inductor L1. The first module includes a first sub-branch, a second sub-branch, a third sub-branch, and a fourth sub-branch connected in parallel. The first sub-branch includes the first single-pole single-throw switch and the second inductor L2 connected in series; the second sub-branch includes the second single-pole single-throw switch and the third inductor L3 connected in series; the third sub-branch includes the third single-pole single-throw switch and the fourth inductor L4 connected in series; and the fourth sub-branch includes the fourth single-pole single-throw switch and the first capacitor C1.

[0046] Optionally, the first tuning circuit 3 is a single-pole four-throw (SP4T) circuit topology. Specifically, as shown in Figure 7, the first tuning circuit 3 includes: a second capacitor C2 connected between the feed 0 and the first radiator de; a first inductor L1 connected between the first radiator de and the ground terminal; a second module connected in parallel with the first inductor L1; the input terminal of the second module is connected between the first radiator de and the second capacitor C2; and the input terminal of the second module is respectively connected to a first single-pole single-throw switch, a second single-pole single-throw switch, a third single-pole single-throw switch, and a fourth single-pole single-throw switch; wherein, the second inductor L2 is connected between the first single-pole single-throw switch and the ground terminal, the third inductor L3 is connected between the second single-pole single-throw switch and the ground terminal, the fourth inductor L4 is connected between the third single-pole single-throw switch and the ground terminal, and the first capacitor C1 is connected between the fourth single-pole single-throw switch and the ground terminal.

[0047] Optionally, the second tuning circuit 4 is a Q-SPST circuit topology. As shown in Figure 8, the second tuning circuit 4 includes: a fifth inductor L5 connected between the third radiator bc and the ground terminal; a third module connected between the third radiator bc and the ground terminal; the third module includes: a fifth sub-branch, a sixth sub-branch, a seventh sub-branch, and an eighth sub-branch connected in parallel; wherein, the fifth sub-branch includes a first single-pole single-throw switch and a sixth inductor L6 connected in series; the sixth sub-branch includes a second single-pole single-throw switch and a third capacitor C3 connected in series; the seventh sub-branch includes a third single-pole single-throw switch and a fourth capacitor C4 connected in series; and the eighth sub-branch includes a fourth single-pole single-throw switch and a fifth capacitor C5.

[0048] Optionally, the second tuning circuit 4 is an SP4T circuit topology. As shown in Figure 9, the second tuning circuit 4 includes: a fifth inductor L5 connected between the third radiator bc and the ground terminal; a fourth module connected between the third radiator bc and the ground terminal; the input terminal of the fourth module is connected between the third radiator bc and the fifth inductor L5; the input terminal of the fourth module is connected to a first single-pole single-throw switch, a second single-pole single-throw switch, a third single-pole single-throw switch, and a fourth single-pole single-throw switch, respectively; wherein, a sixth inductor L6 is connected between the first single-pole single-throw switch and the ground terminal; a third capacitor C3 is connected between the second single-pole single-throw switch and the ground terminal; a fourth capacitor C4 is connected between the third single-pole single-throw switch and the ground terminal; and a fifth capacitor C5 is connected between the fourth single-pole single-throw switch and the ground terminal.

[0049] Based on the schematic diagrams of the first tuning circuit 3 and the second tuning circuit 4 shown in Figures 6 to 9, the tuning principle of the second radiator ab is as follows:

[0050] As shown in Figure 10, the path from the second radiator ab to ground can be equivalent to a series LC circuit, i.e., the capacitance C formed at the break b + the equivalent inductance L corresponding to the third radiator bc + the L or C of the second tuning circuit 4, connected in series to ground. At low frequency LB, the LC circuit is equivalent to capacitance C. b8 C b5 Or C b28 C b8 <C b5 <C b28 According to the aperture tuning principle, by tuning the aperture of the second radiator ab using its loading capacitance C, the resonance shifts to a lower frequency when the equivalent capacitance increases. Specifically:

[0051] (1) When all the switches in the second tuning circuit 4 are turned on, the equivalent circuit is Coff + L + C connected in series to ground. At low frequencies, the equivalent capacitance is C. b8 The antenna resonates in the B8 frequency band. Here, Coff is the blocking capacitance value.

[0052] (2) When the second tuning circuit 4 is turned on at least one radio frequency (RF) pin connected to the capacitor, the equivalent circuit is C. RfC +L+C is connected in series with ground, and the equivalent capacitance at low frequencies is C. b5 The antenna resonates in the B5 band. Among them, C... RfC This is the capacitance value corresponding to the second tuning circuit 4.

[0053] (3) When the RF pin of the second tuning circuit 4 connected to the inductor is turned on, the equivalent circuit is L. RFL +L5+C3 is connected in series to ground, and the equivalent capacitance at low frequencies is C. b28 The antenna resonates in the B28 band. Among them, L... RFL This is the inductance value corresponding to the second tuning circuit 4.

[0054] In some alternative embodiments, as shown in FIG1, the capacitive unit is a capacitor 50, and the two ends of the capacitor 50 are respectively connected to the second radiator ab and the third radiator bc.

[0055] In practice, a capacitor 50 is connected in series on the flexible printed circuit board (PCB) so that the two ends of the PCB circuit are connected to the second radiator ab and the third radiator bc, respectively.

[0056] It should be noted that in the antenna schemes of related technologies, the length of the gap b between the second radiator ab and the third radiator bc is 0.8 to 1.2 mm, and the coupling capacitance at the gap b is relatively small. In the embodiments of this application, by connecting a capacitor 50 in parallel at the gap b, the capacitance value at the gap b can be increased. Furthermore, by cooperating with the first tuning circuit 3 and the second tuning circuit 4, the antenna efficiency can be improved.

[0057] In some alternative embodiments, the capacitive unit includes:

[0058] The first coupling structure 51 is disposed inside the second frame 2 and on the second radiator ab.

[0059] Among them, a portion of the first coupling structure 51 is arranged opposite to the third radiator bc at a second interval.

[0060] For example, as shown in Figure 3, in order to increase the capacitance value at the break b, an L-shaped metal piece is fixedly connected to the second radiator ab, with the short side of the L-shaped metal piece fixedly connected to the second radiator ab, and the long side of the L-shaped metal piece parallel to and opposite to the third radiator bc at a second interval. Thus, the area outlined by the dashed line in Figure 3 is the coupling area formed between the second radiator ab and the third radiator bc. By increasing the coupling area, the coupling capacitance value at the break b can be effectively increased.

[0061] In some alternative embodiments, the capacitive unit includes:

[0062] The second coupling structure 52 is disposed inside the second frame 2 and is disposed on the third radiator bc.

[0063] Among them, a portion of the second coupling structure 52 is arranged opposite to the second radiator ab at a third interval.

[0064] For example, as shown in Figures 2 and 4, in order to increase the capacitance value at the break b, an L-shaped metal piece is fixedly connected to the third radiator bc as a second coupling structure 52. The short side of the L-shaped metal piece is fixedly connected to the third radiator bc, and the long side of the L-shaped metal piece is parallel to and opposite to the second radiator ab at a second interval. In this way, the area circled by the dashed circle in Figure 4 is the coupling area formed between the second radiator ab and the third radiator bc. By increasing the coupling area, the coupling capacitance value at the break b can be effectively increased.

[0065] Optionally, as shown in Figure 2, in order to further increase the capacitance value at the break b, a sixth coupling structure 56 is also provided on the second radiator ab, and the sixth coupling structure 56 is opposite to the short side of the L-shaped metal part.

[0066] It should be noted that, in practical implementation, in order to increase the coupling capacitance at the break point b, the capacitive unit set at the break point b in Figure 2 can also be replaced with the structural design in Figure 3 or Figure 5, or the width of the break point b can be reduced.

[0067] In some alternative embodiments, the capacitive unit includes: a third coupling structure 53, a fourth coupling structure 54 and a fifth coupling structure 55 disposed inside the second frame 2;

[0068] The third coupling structure 53 is disposed on the second radiator ab, the fourth coupling structure 54 is disposed on the third radiator bc, and the fifth coupling structure 55 is disposed opposite to the third coupling structure 53 and the fourth coupling structure 54 at a fourth interval.

[0069] For example, as shown in Figure 5, the fifth coupling structure 55 is a suspended metal sheet, the third coupling structure 53 is a first metal sheet fixed on the second radiator ab, and the fourth coupling structure 54 is a second metal sheet fixed on the third radiator bc. The suspended metal sheet is parallel to and spaced apart from the first and second metal sheets. In this structural design, the area circled by the dashed line in Figure 5 is the coupling area formed between the second radiator ab and the third radiator bc. By increasing the coupling area, the coupling capacitance value at the break b can be effectively increased.

[0070] In some alternative embodiments, the second fold portion includes a first battery housing 6, and the second tuning circuit 4 is disposed outside the first battery housing 6.

[0071] As shown in Figures 1 and 2, by connecting the second tuning circuit 4 to the third radiator bc, compared with the scheme shown in Figure 11 where the second tuning circuit 4 is connected to the second radiator ab, changing the tuning position of the second antenna from the second radiator ab to the third radiator bc allows the second tuning circuit 4 to be placed outside the first battery housing area 6, avoiding the second tuning circuit 4 occupying battery housing space. On the other hand, by cooperating with the structural design of setting the length of the gap b to be less than a preset value, or setting a capacitive unit at the gap b, the radiation efficiency of the antenna can be optimized and improved, and the performance of the antenna and the battery capacity can be improved within a limited space.

[0072] Optionally, as shown in Figures 1 and 2, the first folding portion also includes a second battery receiving area 8, and the first tuning circuit 3 is disposed outside the second battery receiving area 8 to avoid occupying the storage space of the battery.

[0073] In some alternative embodiments, the first frame 1 includes a first side frame 11 and a second side frame 12 disposed opposite to each other. The first side frame 11 is fixedly connected to the second frame 2 via a hinge mechanism 7, and the first radiator de is a first resonant arm disposed on the second side frame 12.

[0074] The second frame 2 includes a third frame 21 and a fourth frame 22 arranged opposite to each other. The third frame 21 is fixedly connected to the first frame 1 through a hinge mechanism 7. The second radiator ab and the third radiator bc are the second resonant arm and the third resonant arm arranged at intervals on the fourth frame 22.

[0075] The first resonant arm is a metal resonant arm; the second and third resonant arms are two metal resonant arms spaced apart.

[0076] For example, in a specific implementation, the first frame 11 on the first frame 1 is rotatably connected to the third frame 21 on the second frame 2 via a hinge mechanism 7. When the electronic device is in the unfolded state as shown in FIG. 14, the first radiator de is far away from the second radiator ab and the third radiator bc; when the electronic device is in the folded state, the first folded portion overlaps with the second folded portion, the first radiator de and the second radiator ab are arranged opposite each other with a first interval, and the second radiator ab is coupled to the third radiator bc.

[0077] In some alternative embodiments, the lengths of the first radiator de and the second radiator ab are equal.

[0078] Optionally, the lengths of the first radiator de and the second radiator ab are 36mm, 33mm, or 39mm, etc. Since antenna design differs from digital circuitry and does not possess typical digital circuitry characteristics, other length dimensions can achieve the same antenna efficiency through matching optimization. Therefore, this dimension is merely an example and is not intended to limit the application.

[0079] In some alternative embodiments, the length of the third radiator bc is less than the length of the second radiator ab.

[0080] Optionally, the length of the second radiator ab is 36 mm, and the length of the third radiator bc is 25 mm.

[0081] It should be noted that, because antenna design differs from digital circuitry and does not possess typical digital circuitry characteristics, other length dimensions can achieve the same antenna efficiency through matching optimization. Therefore, this dimension is merely an example and is not intended to be limiting.

[0082] It should be noted that, in this document, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element. Furthermore, it should be noted that the scope of the methods and apparatuses in the embodiments of this application is not limited to performing functions in the order shown or discussed, but may also include performing functions substantially simultaneously or in the reverse order, depending on the functions involved. For example, the described methods may be performed in a different order than described, and various steps may be added, omitted, or combined. Additionally, features described with reference to certain examples may be combined in other examples.

[0083] Through the above description of the embodiments, those skilled in the art can clearly understand that the methods of the above embodiments can be implemented by means of software plus necessary general-purpose hardware platforms. Of course, they can also be implemented by hardware, but in many cases the former is a better implementation method. Based on this understanding, the technical solution of this application, in essence, or the part that contributes to the related technology, can be embodied in the form of a software product. This computer software product is stored in a storage medium (such as ROM / RAM, magnetic disk, optical disk) and includes several instructions to cause a terminal (which may be a mobile phone, computer, server, air conditioner, or network device, etc.) to execute the methods described in the various embodiments of this application.

[0084] The embodiments of this application have been described above with reference to the accompanying drawings. However, this application is not limited to the specific embodiments described above. The specific embodiments described above are merely illustrative and not restrictive. Those skilled in the art can make many other forms under the guidance of this application without departing from the spirit and scope of the claims, and all of these forms are within the protection scope of this application.

Claims

1. An electronic device, comprising: A first folding portion and a second folding portion are rotatably connected; The first folded portion includes a first frame and a first antenna. The first antenna includes a feed and a first radiator disposed on the first frame. The feed and the first radiator are connected through a first tuning circuit. The second folded portion includes a second frame and a second antenna. The second antenna includes a second radiator and a third radiator disposed on the second frame, and the second radiator and the third radiator are coupled through a gap. When the electronic device is in a folded state, the first radiator and the second radiator are disposed opposite each other with a first interval, and the second radiator is coupled to the third radiator; A second tuning circuit is connected between the third radiator and the ground terminal; The length of the fracture is less than a preset value, or a resilient unit is provided at the fracture.

2. The electronic device according to claim 1, wherein, The capacitive unit is a capacitor, and the two ends of the capacitor are respectively connected to the second radiator and the third radiator.

3. The electronic device according to claim 1, wherein, The capacitive unit includes: The first coupling structure is disposed on the inner side of the second frame and on the second radiator; In this configuration, a portion of the first coupling structure is positioned opposite the third radiator at a second interval.

4. The electronic device according to claim 1, wherein, The capacitive unit includes: The second coupling structure is disposed inside the second frame and is also disposed on the third radiator; In this configuration, a portion of the second coupling structure is positioned opposite the second radiator at a third interval.

5. The electronic device according to claim 1, wherein, The capacitive unit includes: a third coupling structure, a fourth coupling structure, and a fifth coupling structure disposed on the inner side of the second frame; The third coupling structure is disposed on the second radiator, the fourth coupling structure is disposed on the third radiator, and the fifth coupling structure is disposed opposite to the third and fourth coupling structures at a fourth interval.

6. The electronic device according to claim 1, wherein, The second folded portion includes a first battery housing area, and the second tuning circuit is disposed outside the first battery housing area.

7. The electronic device according to claim 1, wherein, The first frame includes a first side frame and a second side frame disposed opposite to each other. The first side frame is fixedly connected to the second frame via a hinge mechanism. The first radiator is a first resonant arm disposed on the second side frame.

8. The electronic device according to claim 1, wherein, The second frame includes a third frame and a fourth frame arranged opposite to each other. The third frame is fixedly connected to the first frame via a hinge mechanism. The second radiator and the third radiator are a second resonant arm and a third resonant arm arranged at intervals on the fourth frame.

9. The electronic device according to claim 1, wherein, The first radiator and the second radiator have the same length.

10. The electronic device according to claim 1, wherein, The length of the third radiator is less than the length of the second radiator.

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