Foldable electronic device

Abstract

The invention provides foldable electronic equipment. The foldable electronic equipment comprises a bendable main body, a first low-frequency antenna and a second low-frequency antenna, a first radiation section of a first antenna radiation body of the first low-frequency antenna is positioned on the second edge of the bendable main body and is electrically connected with a first feed source; the second radiation section is located at the third edge and provided with a first grounding point. A third radiation section of a second antenna radiation body of the second low-frequency antenna is located at the fourth edge and is provided with a second grounding point; the fourth radiation section is located at the third edge and is connected with the third radiation section; one end of the parasitic radiation section and the fourth radiation section form a coupling gap, the other end is grounded through the first tuning circuit, and the fourth radiation section or the parasitic radiation section is electrically connected with the second feed source. The first resonance current generated by the first low-frequency antenna is mainly distributed along the second edge, and the second resonance current generated by the second low-frequency antenna is mainly distributed along the third edge. The communication performance of the foldable electronic equipment provided by the invention is relatively good.

Description

Technical Field

[0001] The present application relates to the field of electronic technology, and in particular to a foldable electronic device. Background Art

[0002] Affected by the floor current, the radiation efficiency of the low-frequency antenna in the foldable electronic device is lower to a certain extent when it is folded than when it is unfolded. Therefore, how to improve the communication performance of the foldable electronic device when it is folded has become a technical problem that needs to be solved. Summary of the invention

[0003] The present application provides a foldable electronic device capable of improving communication performance.

[0004] Specifically, the present application provides a foldable electronic device, including:

[0005] A bendable body, the bendable body comprising a first body, a second body and a shaft assembly, the first body and the second body being rotatably connected via the shaft assembly and being able to present a relatively folded state or an unfolded state, the bendable body having a first edge, a second edge, a third edge and a fourth edge connected end to end in sequence, the first edge being located on a side of the first body away from the shaft assembly, and the third edge being located on a side of the second body away from the shaft assembly;

[0006] A first low-frequency antenna, comprising a first antenna radiator and a first feed source, wherein the first antenna radiator comprises a first radiating section and a second radiating section connected to each other, the first radiating section is located at the second edge and is provided with a first feeding point, the first feeding point is electrically connected to the first feed source, an end of the first radiating section away from the second radiating section forms a free end of the first antenna radiator, the second radiating section is located at the third edge and is provided with a first grounding point, and the first grounding point is grounded; and

[0007] A second low-frequency antenna, comprising a second antenna radiator, a second feed source and a first tuning circuit, wherein the second antenna radiator comprises a third radiating section, a fourth radiating section and a parasitic radiating section, wherein the third radiating section is located at the fourth edge and is provided with a second grounding point, the second grounding point is grounded, the fourth radiating section is located at the third edge and is connected to the third radiating section, the parasitic radiating section is located between the fourth radiating section and the second radiating section, one end of the parasitic radiating section forms a coupling gap with the fourth radiating section, and the other end is grounded through the first tuning circuit, the fourth radiating section or the parasitic radiating section is provided with a second feeding point, and the second feeding point is electrically connected to the second feed source;

[0008] The first resonant current generated by the first low-frequency antenna is mainly distributed along the second edge, and the second resonant current generated by the second low-frequency antenna is mainly distributed along the third edge.

[0009] The foldable electronic device provided in the present application includes a bendable body, a first low-frequency antenna and a second low-frequency antenna. Since the first antenna radiator of the first low-frequency antenna includes a connected first radiating section and a second radiating section, the first radiating section is located at the second edge of the bendable body, and the second radiating section is located at the third edge of the bendable body, the second antenna radiator of the second low-frequency antenna includes a third radiating section, a fourth radiating section and a parasitic radiating section, the third radiating section is connected to the fourth radiating section, the third radiating section is located at the fourth edge of the bendable body, the fourth radiating section is located at the third edge of the bendable body, and the parasitic radiating section is located between the fourth radiating section and the second radiating section, that is, the first low-frequency antenna and the second low-frequency antenna are located at two corners of the second body of the bendable body, and the first grounding point of the first low-frequency antenna is located at the third edge, and the fourth radiating section, the parasitic radiating section and the second feeding point of the second low-frequency antenna are all located at the third edge, so that the current on the radiator of the first low-frequency antenna and the floor current excited by it, and the current on the radiator of the second low-frequency antenna are less affected by the folding state of the foldable electronic device, thereby improving the communication performance of the foldable electronic device. In addition, the free end of the first antenna radiator is away from the second low-frequency antenna, the first tuning circuit increases the electrical isolation between the first low-frequency antenna and the second low-frequency antenna, and the first low-frequency antenna generates a first resonant current mainly distributed along the second edge, and the second low-frequency antenna generates a second resonant current mainly distributed along the third edge, thereby ensuring the isolation between the two low-frequency antennas simultaneously located on the second body, reducing the envelope correlation coefficient between the two, and realizing the complementarity of the directional diagrams, thereby improving the communication performance of the foldable electronic device. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments are briefly introduced below.

[0011] Figure 1 A schematic diagram of the structure of a foldable electronic device in the related art including a first low-frequency antenna radiator and a second low-frequency antenna radiator;

[0012] Figure 2 for Figure 1 The schematic diagram of the structure of the foldable electronic device in different states is shown;

[0013] Figure 3 for Figure 2 Return loss curves and radiation efficiency curves of the foldable electronic device in different states are shown;

[0014] Figure 4A schematic diagram of the structure of a foldable electronic device provided in an embodiment of the present application includes a bendable body, a first low-frequency antenna and a second low-frequency antenna;

[0015] Figure 5 for Figure 4 A schematic diagram of a structure in which a bendable body of the foldable electronic device shown comprises a first edge, a second edge, a third edge and a fourth edge, a first radiating section of a first antenna radiator in a first low-frequency antenna is located at the second edge, a second radiating section is located at the third edge, a third radiating section of a second antenna radiator in a second low-frequency antenna is located at the fourth edge, and a fourth radiating section and a parasitic radiating section are located at the third edge;

[0016] Figure 6 for Figure 5 A schematic diagram of a structure in which a second feeding point of a second low-frequency antenna of a foldable electronic device is located in a parasitic radiation section;

[0017] Figure 7 for Figure 5 A schematic structural diagram showing that a fourth radiation segment of the foldable electronic device forms a coupling gap with one end of the parasitic radiation segment, and the other end of the parasitic radiation segment is connected to the second radiation segment;

[0018] Figure 8 for Figure 5 A schematic structural diagram of the foldable electronic device, in which a fourth radiation segment forms a coupling gap with one end of a parasitic radiation segment, and the other end of the parasitic radiation segment forms an isolation gap with the second radiation segment;

[0019] Fig. 9 for Figure 5 A schematic structural diagram showing that a first connection point is formed at a connection between a first radiation section and a second radiation section of the foldable electronic device, and a length of the second radiation section between a first ground point of a first antenna radiator and the first connection point is less than a length of the first radiation section;

[0020] Fig.10 for Fig. 9 A schematic structural diagram showing that the first grounding point of the first low-frequency antenna of the foldable electronic device is located at an end of the second radiation section away from the first radiation section;

[0021] Fig.11 for Figure 5 A schematic structural diagram showing that a second connection point is formed at a connection between a third radiation segment and a fourth radiation segment of the foldable electronic device, and a sum of a length of the fourth radiation segment and a length of the parasitic radiation segment is greater than a length of the third radiation segment between a second ground point and the second connection point;

[0022] Fig.12 for Fig.11A schematic structural diagram showing that the length of the parasitic radiation section of the foldable electronic device is less than the sum of the length of the third radiation section between the second ground point and the second connection point and the length of the fourth radiation section;

[0023] Fig.13 for Fig.12 A schematic diagram of the resonant current distribution of the first resonant mode generated by the second antenna radiator of the foldable electronic device under the excitation of the second feed source;

[0024] Fig.14 for Fig.12 A schematic diagram of the resonant current distribution of a second resonant mode generated by a second antenna radiator of the foldable electronic device under the excitation of a second feed source;

[0025] Fig.15 for Fig.12 The foldable electronic device further includes a structural schematic diagram of a first matching circuit electrically connected between a feeding point of the second low-frequency antenna and a second feed source;

[0026] Fig.16 for Fig.15 A schematic structural diagram showing that the connection between the second edge and the third edge of the foldable electronic device forms a floor corner point, and the distance between the first grounding point and the floor corner point is less than or equal to 1 / 16 wavelength corresponding to the resonant frequency band of the first low-frequency antenna;

[0027] Fig.17 for Fig.16 A schematic diagram of the distribution of current excited by the first antenna radiator of the foldable electronic device on the floor of the foldable electronic device;

[0028] Fig.18 for Fig.16 A schematic structural diagram of a foldable electronic device in which the length of the first antenna radiator between the first feeding point and the first grounding point is less than or equal to 1 / 2 of the length of the first antenna radiator between the first grounding point and the free end of the first antenna radiator;

[0029] Fig.19 for Fig.18 A schematic diagram of the resonant current distribution of the third resonant mode generated by the first antenna radiator of the foldable electronic device under the excitation of the first feed source;

[0030] Fig. 20 for Fig.18 A schematic diagram of the resonant current distribution of the fourth resonant mode generated by the first antenna radiator of the foldable electronic device under the excitation of the first feed source;

[0031] Fig.21 for Fig.18The first low-frequency antenna of the foldable electronic device may further include a structural schematic diagram of a second matching circuit electrically connected between the first feeding point and the first feed source;

[0032] Fig. 22 for Fig.21 The first low-frequency antenna of the foldable electronic device further includes a structural schematic diagram of a second tuning circuit with one end electrically connected to the first antenna radiator and the other end grounded;

[0033] Fig.23 A schematic diagram of the structure of a foldable electronic device provided in an embodiment of the present application;

[0034] Fig.24 for Fig.23 A graph showing the radiation efficiency of the foldable electronic device;

[0035] Fig.25 for Fig.23 Return loss and isolation curves of the foldable electronic device shown;

[0036] Fig.26 for Fig.23 The radiation pattern of the first low-frequency antenna in the foldable electronic device shown;

[0037] Fig. 27 for Fig.23 The radiation pattern of the second low-frequency antenna in the foldable electronic device shown;

[0038] Fig.28 for Fig.23 An envelope correlation coefficient curve diagram of the foldable electronic device shown;

[0039] Fig.29 for Fig.23 Signal coverage diagram of the foldable electronic device shown;

[0040] Fig.30 for Fig.23 The foldable electronic device shown also includes a first circuit board arranged in the first body, a second circuit board arranged in the second body, a radio frequency chip arranged on the first circuit board, and a structural schematic diagram of multiple medium and high frequency antennas.

[0041] Description of reference numerals:

[0042] Foldable electronic device 2000; first low-frequency antenna radiator 21; second low-frequency antenna radiator 22; foldable electronic device 1000; bendable body 10; first low-frequency antenna 20; second low-frequency antenna 30; first body 101; second body 102; hinge assembly 103; first edge 104; second edge 105; third edge 106; fourth edge 107; first sub-edge 150; second sub-edge 151; third sub-edge 170; fourth sub-edge 171; first antenna radiator 201; first feed source 202; first radiation section 210; second radiation section 211; first feeding point 2101; free end 2102; first grounding point 2110; second antenna radiator 301; second feed source 302; first tuning circuit 303; third radiation section 310; fourth radiation section 311; parasitic radiation section 312; second grounding point 3101; second feed point 3110; coupling gap 3120; isolation gap 3121; first connection point 203; second connection point 305; first matching circuit 304; floor corner point 108; second matching circuit 204; second tuning circuit 205; first circuit board 40; second circuit board 50; RF chip 60; medium and high frequency antenna 70; third antenna radiator 701; third feed source 702. DETAILED DESCRIPTION

[0043] The technical solution provided by the present application will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the embodiments described in the present application are only a part of the embodiments, not all of the embodiments. Based on the embodiments described in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present application.

[0044] References to "embodiments" and "implementations" in this application mean that the specific features, structures, or characteristics described in conjunction with the embodiments or implementations may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it mutually exclusive, independent, or alternative to other embodiments. It can be explicitly and implicitly understood by those skilled in the art that the embodiments described in this application can be combined with other embodiments.

[0045] The terms "first", "second", etc. in the specification and claims of this application and the above-mentioned drawings are used to distinguish different objects rather than to describe a specific order; the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions.

[0046] like Figure 1As shown, in the related art, the foldable electronic device 2000 includes a first low-frequency antenna radiator 21 and a second low-frequency antenna radiator 22. The first low-frequency antenna radiator 21 is located in the upper half of the foldable electronic device 1000, and the second low-frequency antenna radiator 22 is located in the lower half of the foldable electronic device 1000. The upper half of the foldable electronic device 2000 can be understood as the part of the foldable electronic device 1000 between the bending axis of the foldable electronic device 2000 and the top boundary line of the foldable electronic device 2000. The lower half of the foldable electronic device 2000 can be understood as the part of the foldable electronic device 2000 between the bending axis of the foldable electronic device 2000 and the bottom boundary line of the foldable electronic device 2000. It can be understood that the bending axis of the foldable electronic device 2000 divides the foldable electronic device 2000 into the upper half of the foldable electronic device 2000 and the lower half of the foldable electronic device 2000. The first low-frequency antenna radiator 21 is located in the upper half of the foldable electronic device 2000. The second low-frequency antenna radiator 22 is located at the lower half of the foldable electronic device 2000. Considering that the low-frequency antenna radiator is long, the first low-frequency antenna radiator 21 and the second low-frequency antenna radiator 22 are respectively located at two folding edges (generally the long edges of the foldable electronic device 2000) of the foldable electronic device 2000. When the foldable electronic device 2000 is folded, the folding edge of the foldable electronic device 2000 is bent until the foldable electronic device 2000 is in a folded state, and the folding edge of the foldable electronic device 2000 is folded together. At this time, the length of the floor corresponding to the first low-frequency antenna radiator 21 and the second low-frequency antenna radiator 22 is halved, and the reverse current excited by the first low-frequency antenna radiator 21 and the second low-frequency antenna radiator 22 on the floor is large, resulting in low radiation efficiency of the first low-frequency antenna radiator 21 and the second low-frequency antenna radiator 22, and poor communication performance of the foldable electronic device 2000.

[0047] Please refer to Figure 2 and Figure 3 , Figure 2 for Figure 1 The structure diagram of the foldable electronic device 2000 in different states is shown. Figure 3 for Figure 2 The return loss (S11) curve and the radiation efficiency curve of the foldable electronic device 2000 in different states are shown. Figure 2 Figure a in the middle corresponds to a structural schematic diagram of the foldable electronic device 2000 in an unfolded state. Figure 2 Figure b corresponds to the structural diagram of the upper half of the foldable electronic device 2000. Figure 2 Figure c in the middle corresponds to a schematic structural diagram in which the upper half of the foldable electronic device 2000 and the lower half of the foldable electronic device 2000 are folded but not connected. Figure 2 Figure d in the middle corresponds to a structural schematic diagram of the foldable electronic device 2000 in a folded state. Figure 3 The middle curve 1 corresponds to the return loss curve when the foldable electronic device 2000 is in the unfolded state, that is, Figure 2 The return loss curve in Figure a. Figure 3 The middle curve 2 corresponds to the return loss curve of the upper half of the foldable electronic device 2000, that is, Figure 2 The return loss curve in Figure b. Figure 3 The middle curve 3 corresponds to the return loss curve when the upper part of the foldable electronic device 2000 and the lower part of the foldable electronic device 2000 are folded but not connected, that is, Figure 2 The return loss curve in Figure c. Figure 3 The middle curve 4 corresponds to the return loss curve when the foldable electronic device 2000 is in a folded state (ie, the upper part of the foldable electronic device 2000 and the lower part of the foldable electronic device 2000 are folded and connected), that is, Figure 2 The return loss curve in Figure d. Figure 3 The middle curve 5 corresponds to the radiation efficiency curve when the foldable electronic device 2000 is in the unfolded state, that is, Figure 2 Radiation efficiency curve in Figure a. Figure 3 The middle curve 6 corresponds to the radiation efficiency curve of the upper half of the foldable electronic device 2000, that is, Figure 2 Radiation efficiency curve in Figure b. Figure 3 The middle curve 7 corresponds to the radiation efficiency curve when the upper part of the foldable electronic device 2000 and the lower part of the foldable electronic device 2000 are folded but not connected, that is, Figure 2 Radiation efficiency curve in Figure c. Figure 3 The middle curve 8 corresponds to the radiation efficiency curve when the foldable electronic device 2000 is in the folded state, that is, Figure 2 Radiation efficiency curve in Figure d.

[0048] contrast Figure 3 It can be seen from curves 5 and 6 that the radiation efficiency of the upper part of the foldable electronic device 2000 is lower than the radiation efficiency when the foldable electronic device 2000 is in the unfolded state. This is because the length of the floor corresponding to the low-frequency antenna radiator is halved in the upper part of the foldable electronic device 2000 relative to the foldable electronic device 2000 in the unfolded state, the contribution of the current distribution of the floor to the radiation efficiency of the low-frequency antenna radiator is reduced, and the "left sideband" of the radiation efficiency curve shifts to the right, resulting in a decrease in the radiation efficiency of the foldable electronic device 2000.

[0049] contrast Figure 3It can be seen from curves 6 and 7 that the radiation efficiency when the upper part of the foldable electronic device 2000 and the lower part of the foldable electronic device 2000 are folded but not connected is lower than the radiation efficiency of the upper part of the foldable electronic device 2000. This is because when the upper part of the foldable electronic device 2000 and the lower part of the foldable electronic device 2000 are folded but not connected, half of the floor is added compared to the upper part of the foldable electronic device 2000, and the reverse current increases accordingly, resulting in an overall decrease in the radiation efficiency of the foldable electronic device 2000.

[0050] contrast Figure 3 It can be seen from curve 8 and curve 7 that the radiation efficiency of the foldable electronic device 2000 when in the folded state is partially improved compared to the radiation efficiency when the upper part of the foldable electronic device 2000 and the lower part of the foldable electronic device 2000 are folded but not connected. This is because when the foldable electronic device 2000 is in the folded state, compared to when the upper part of the foldable electronic device 2000 and the lower part of the foldable electronic device 2000 are folded but not connected, boundary conditions are formed to generate a slot mode, and the radiation efficiency at the resonant position corresponding to the slot mode is improved, but the overall radiation efficiency of the foldable electronic device 2000 is still poor compared to the radiation efficiency when the foldable electronic device 2000 is in the unfolded state.

[0051] From this, it can be seen that the layout of the first low-frequency antenna radiator 21 and the second low-frequency antenna radiator 22 of the foldable electronic device 2000 in the related art cannot avoid the efficiency loss when the foldable electronic device 2000 is in the folded state. In the N28 frequency band (approximately 0.7GHz~0.8GHz), the radiation efficiency drops by nearly 10dB.

[0052] To this end, the present application provides a foldable electronic device 1000 that can improve radiation efficiency and communication performance by improving the structure and layout of the low-frequency antenna in the foldable electronic device 1000. Unless otherwise specified, the low-frequency antenna described in the present application refers to an antenna with a resonant frequency band less than 1 GHz.

[0053] like Figure 4 As shown, Figure 4 A schematic diagram of the structure of a foldable electronic device 1000 provided in an embodiment of the present application. The foldable electronic device 1000 may be a foldable mobile phone, a foldable tablet, etc. In the embodiment of the present application, a foldable mobile phone is taken as an example. The foldable electronic device 1000 includes a bendable body 10, a first low-frequency antenna 20, and a second low-frequency antenna 30. Of course, the foldable electronic device 1000 may also include a display screen, a camera, a battery, etc.

[0054] The bendable body 10 includes a first body 101, a second body 102 and a shaft assembly 103. The first body 101 and the second body 102 are rotatably connected through the shaft assembly 103 and can be in a relatively folded state or an unfolded state. Specifically, when the bendable body 10 is in the unfolded state, the first body 101 and the second body 102 are unfolded on opposite sides of the shaft assembly 103. Figure 4 That is, it is a schematic diagram of the foldable electronic device 1000 in the unfolded state. When the foldable body 10 is in the folded state, the first body 101 and the second body 102 are folded in half or approximately folded in half.

[0055] Please refer to Figure 4 and Figure 5 The bendable body 10 has a first edge 104, a second edge 105, a third edge 106 and a fourth edge 107 which are connected end to end in sequence. The first edge 104 and the third edge 106 are arranged opposite to each other. The second edge 105 and the fourth edge 107 are arranged opposite to each other. The first edge 104 and the second edge 105, the second edge 105 and the third edge 106, the third edge 106 and the fourth edge 107, and the fourth edge 107 and the first edge 104 are all bent. In a possible embodiment, the first edge 104 and the second edge 105, the second edge 105 and the third edge 106, the third edge 106 and the fourth edge 107, and the fourth edge 107 and the first edge 104 can be straight-line bent connections. In another possible implementation, the first edge 104 and the second edge 105 , the second edge 105 and the third edge 106 , the third edge 106 and the fourth edge 107 , and the fourth edge 107 and the first edge 104 may be connected by arc-shaped bends.

[0056] The first edge 104 is located on a side of the first body 101 away from the shaft assembly 103. The third edge 106 is located on a side of the second body 102 away from the shaft assembly 103. In other words, the first edge 104 and the third edge 106 are located on opposite sides of the shaft assembly 103. The second edge 105 includes a first sub-edge 150 located on one side of the shaft assembly 103 and a second sub-edge 151 located on the other side of the shaft assembly 103. The fourth edge 107 includes a third sub-edge 170 located on one side of the shaft assembly 103 and a fourth sub-edge 171 located on the other side of the shaft assembly 103. It can be understood that the first edge 104 and the third edge 106 are non-folding edges of the bendable body 10, and the second edge 105 and the fourth edge 107 are foldable edges of the bendable body 10. In the embodiment of the present application, the first sub-edge 150 and the third sub-edge 170 are located on the same side of the rotating shaft assembly 103; the first edge 104, the first sub-edge 150 and the third sub-edge 170 form the edge of the first body 101. The second sub-edge 151 and the fourth sub-edge 171 are located on the same side of the rotating shaft assembly 103; the third edge 106, the second sub-edge 151 and the fourth sub-edge 171 form the edge of the second body 102.

[0057] In the embodiment of the present application, the first body 101 forms the upper half of the bendable body 10, and the second body 102 forms the lower half of the bendable body 10. It can be understood that in the embodiment of the present application, the first edge 104 is the top edge of the bendable body 10, and the third edge 106 is the bottom edge of the bendable body 10. Of course, in other embodiments, the first body 101 can form the lower half of the bendable body 10, and the second body 102 can form the upper half of the bendable body 10; that is, the first edge 104 can be the bottom edge of the bendable body 10, and the third edge 106 is the top edge of the bendable body 10.

[0058] The first low-frequency antenna 20 includes a first antenna radiator 201 and a first feed source 202. The first antenna radiator 201 can generate a first resonant current under the excitation of the first feed source 202.

[0059] The first antenna radiator 201 may be a frame antenna radiator or an internal antenna radiator. The material of the first antenna radiator 201 may be metal or alloy. Part of the first antenna radiator 201 is located at the second edge 105, and another part of the first antenna radiator 201 is located at the third edge 106. Specifically, the first antenna radiator 201 includes a first radiating section 210 and a second radiating section 211. The first radiating section 210 is located at the second edge 105. In the embodiment of the present application, the first radiating section 210 is located at the second sub-edge 151. The second radiating section 211 is located at the third edge 106.

[0060] The first radiation section 210 is connected to the second radiation section 211. Optionally, the first radiation section 210 is directly connected to the second radiation section 211, or the first radiation section 210 is indirectly connected to the second radiation section 211. In the embodiment of the present application, the first radiation section 210 is directly connected to the second radiation section 211.

[0061] Since the first antenna radiator 201 includes a first radiating section 210 located at the second edge 105 and a second radiating section 211 located at the third edge 106, the first antenna radiator 201 can generate a first resonant current distributed along the second edge 105 and a first resonant current distributed along the third edge 106 under the excitation of the first feed source 202. In the embodiment of the present application, the first resonant current distributed along the second edge 105 can also be understood as a first resonant current distributed along the longitudinal direction of the foldable electronic device 1000. The first resonant current distributed along the third edge 106 can also be understood as a first resonant current distributed along the transverse direction of the foldable electronic device 1000. In other words, the first antenna radiator 201 in the embodiment of the present application can generate a first resonant current distributed along the transverse direction of the foldable electronic device 1000 and a first resonant current distributed along the longitudinal direction of the foldable electronic device 1000 under the excitation of the first feed source 202. Since the third edge 106 is a non-folding edge of the bendable body 10, the first resonant current distributed along the third edge 106 is not affected by the folding state of the foldable electronic device 1000, and only the first resonant current distributed along the second edge 105 is affected by the folding state of the foldable electronic device 1000, thereby improving the radiation efficiency of the first low-frequency antenna 20 when the foldable electronic device 1000 is in the folded state to a certain extent.

[0062] The first radiation section 210 is provided with a first feeding point 2101. The first feeding point 2101 can be understood as a specific position of the first radiation section 210. The first feeding point 2101 can be set close to one end of the first radiation section 210 away from the second radiation section 211; or, the first feeding point 2101 can be set close to the connection between the first radiation section 210 and the second radiation section 211; or, the first feeding point 2101 can be located at the midpoint of the first radiation section 210. The first feeding point 2101 is electrically connected to the first feed source 202. The first feeding point 2101 and the first feed source 202 can be electrically connected directly or indirectly. For example: the first feeding point 2101 and the first feed source 202 can be electrically connected through a conductive wire, a conductive column, a conductive sheet, a conductive probe, etc.

[0063] By providing the first feeding point 2101 in the first radiation section 210, that is, the first feeding point 2101 is located at the second edge 105, it is beneficial for the first antenna radiator 201 to excite more first resonant currents distributed along the second edge 105, thereby facilitating the first resonant current generated by the first low-frequency antenna 20 to be mainly distributed along the second edge 105.

[0064] The first radiating section 210 is away from the second radiating section 211 to form a free end 2102 of the first antenna radiator 201. The free end 2102 can be understood as an end that is not electrically connected to the conductive member or has a gap between the conductive member. In other words, the end of the first radiating section 210 away from the second radiating section 211 is in an open circuit state.

[0065] By making the first radiating section 210 away from the second radiating section 211 to form the free end 2102 of the first antenna radiator 201 , the main radiation area of ​​the first antenna radiator 201 can be away from the second low frequency antenna 30 , thereby improving the isolation between the first low frequency antenna 20 and the second low frequency antenna 30 .

[0066] The second radiation section 211 is provided with a first grounding point 2110. The first grounding point 2110 can be understood as a specific position of the second radiation section 211. The first grounding point 2110 can be located at an end of the second radiation section 211 away from the first radiation section 210; or, the first grounding point 2110 can be close to an end of the second radiation section 211 away from the first radiation section 210; or, the first grounding point 2110 can be close to the connection between the second radiation section 211 and the first radiation section 210; or, the first grounding point 2110 can be located at the midpoint of the second radiation section 211. The first grounding point 2110 is grounded. The first resonant current generated by the first antenna radiator 201 can be returned to the ground from the first grounding point 2110.

[0067] Since the second radiation section 211 is located at the third edge 106, by setting the first grounding point 2110 at the second radiation section 211, that is, setting the first grounding point 2110 at the third edge 106, the first antenna radiator 201 can excite more currents distributed along the third edge 106 on the reference floor of the foldable electronic device 1000. The third edge 106 is a non-folding edge of the bendable body 10, so it can reduce the influence of the folding state of the foldable electronic device 1000 on the current excited by the first antenna radiator 201 on the floor, and can further improve the radiation efficiency of the first low-frequency antenna 20 when the foldable electronic device 1000 is in the folded state.

[0068] The second low-frequency antenna 30 includes a second antenna radiator 301, a second feed source 302, and a first tuning circuit 303. The second antenna radiator 301 can generate a second resonant current under the excitation of the second feed source 302.

[0069] Among them, the second antenna radiator 301 can be a frame antenna radiator or an internal antenna radiator. The material of the second antenna radiator 301 can be metal or alloy. Part of the second antenna radiator 301 is located at the third edge 106, and the other part of the second antenna radiator 301 is located at the fourth edge 107. Specifically, the second antenna radiator 301 includes a third radiation section 310, a fourth radiation section 311 and a parasitic radiation section 312. The third radiation section 310 is located at the fourth edge 107. In the embodiment of the present application, the third radiation section 310 is located at the fourth sub-edge 171. The fourth radiation section 311 is located at the third edge 106. The parasitic radiation section 312 is located at the third edge 106, and the parasitic radiation section 312 is located between the fourth radiation section 311 and the second radiation section 211.

[0070] The third radiation section 310 is connected to the fourth radiation section 311. Optionally, the third radiation section 310 is directly connected to the fourth radiation section 311, or the third radiation section 310 is indirectly connected to the fourth radiation section 311. In the embodiment of the present application, the third radiation section 310 is directly connected to the fourth radiation section 311.

[0071] Since the second antenna radiator 301 includes a fourth radiation section 311 located at the third edge 106, a parasitic radiation section 312, and a third radiation section 310 located at the fourth edge 107, the second antenna radiator 301 can generate a second resonant current distributed along the third edge 106 and a second resonant current distributed along the fourth edge 107 under the excitation of the second feed source 302. In the embodiment of the present application, the second resonant current distributed along the third edge 106 can also be understood as a second resonant current distributed along the transverse direction of the foldable electronic device 1000. The second resonant current distributed along the fourth edge 107 can also be understood as a second resonant current distributed along the longitudinal direction of the foldable electronic device 1000. In other words, the second antenna radiator 301 in the embodiment of the present application can generate a second resonant current distributed along the transverse direction of the foldable electronic device 1000 and a second resonant current distributed along the longitudinal direction of the foldable electronic device 1000 under the excitation of the second feed source 302. The third edge 106 is a non-folding edge of the bendable body 10, so that the second resonant current distributed along the third edge 106 is not affected by the folding state of the foldable electronic device 1000, and only the second resonant current distributed along the fourth edge 107 is affected by the folding state of the foldable electronic device 1000, thereby improving the radiation efficiency of the second low-frequency antenna 30 when the foldable electronic device 1000 is in the folded state to a certain extent.

[0072] The third radiation section 310 is provided with a second grounding point 3101. The second grounding point 3101 can be understood as a specific position of the third radiation section 310. The second grounding point 3101 can be located at an end of the third radiation section 310 away from the fourth radiation section 311; or, the second grounding point 3101 can be close to an end of the third radiation section 310 away from the fourth radiation section 311; or, the second grounding point 3101 can be close to the connection between the third radiation section 310 and the fourth radiation section 311; or, the second grounding point 3101 can be located at the midpoint of the third radiation section 310. The second grounding point 3101 is grounded. The second resonant current generated by the second antenna radiator 301 can be returned to the ground from the second grounding point 3101.

[0073] The fourth radiation section 311 or the parasitic radiation section 312 is provided with a second feeding point 3110. In a possible embodiment, Figure 5 As shown, the fourth radiation segment 311 is provided with the second feeding point 3110. In this embodiment, the second feeding point 3110 can be understood as a specific position of the fourth radiation segment 311. The second feeding point 3110 can be set close to an end of the fourth radiation segment 311 away from the third radiation segment 310; or, the second feeding point 3110 can be set close to the connection between the fourth radiation segment 311 and the third radiation segment 310; or, the second feeding point 3110 can be located at the midpoint of the fourth radiation segment 311. In another possible embodiment, as Figure 6 As shown, the parasitic radiation section 312 is provided with the second feeding point 3110. In this embodiment, the second feeding point 3110 can be understood as a specific position of the parasitic radiation section 312. The second feeding point 3110 can be set close to the end of the parasitic radiation section 312 away from the fourth radiation section 311; or, the second feeding point 3110 can be set close to the end of the parasitic radiation section 312 away from the second radiation section 211; or, the second feeding point 3110 can be located at the midpoint of the parasitic radiation section 312.

[0074] The second feeding point 3110 is electrically connected to the second feed source 302. Optionally, the second feeding point 3110 can be electrically connected to the second feed source 302 directly or indirectly. For example, the second feeding point 3110 can be electrically connected to the second feed source 302 through a conductive wire, a conductive column, a conductive sheet, a conductive probe, etc.

[0075] By providing the fourth radiation section 311 or the parasitic radiation section 312 with the second feeding point 3110, that is, the second feeding point 3110 is located at the third edge 106, it is beneficial for the second antenna radiator 301 to excite more second resonance currents distributed along the third edge 106. The third edge 106 is a non-folding edge of the bendable body 10, so that the influence of the folding state of the foldable electronic device 1000 on the second resonance current generated by the second antenna radiator 301 can be reduced, the radiation efficiency of the second low-frequency antenna 30 when the foldable electronic device 1000 is in the folded state can be improved, and it is beneficial to achieve that the second resonance current generated by the second low-frequency antenna 30 is mainly distributed along the third edge 106.

[0076] like Figure 7 As shown, a coupling gap 3120 is formed between one end of the parasitic radiation section 312 and the fourth radiation section 311. Specifically, a coupling gap 3120 is formed between one end of the parasitic radiation section 312 close to the fourth radiation section 311 and the fourth radiation section 311. The size of the coupling gap 3120 between the parasitic radiation section 312 and the fourth radiation section 311 can be 0.5 mm to 2 mm. It can be understood that the parasitic radiation section 312 and the fourth radiation section 311 are capacitively coupled or electromagnetically coupled.

[0077] The other end of the parasitic radiation section 312 is grounded through the first tuning circuit 303. Specifically, the end of the parasitic radiation section 312 away from the fourth radiation section 311 is grounded through the first tuning circuit 303. The first tuning circuit 303 may include a switch, a capacitor and / or an inductor, etc. The first tuning circuit 303 and the other end of the parasitic radiation section 312 may be directly electrically connected or indirectly electrically connected. For example, the first tuning circuit 303 and the other end of the parasitic radiation section 312 may be electrically connected through a conductive wire, a conductive column, a conductive sheet, a conductive probe, etc.

[0078] Since the parasitic radiation section 312 is located between the fourth radiation section 311 and the second radiation section 211, the other end of the parasitic radiation section 312 is grounded through the first tuning circuit 303. The first tuning circuit 303 can present different resistance states under the first resonant current generated by the first low-frequency antenna 20 and the second resonant current generated by the second low-frequency antenna 30, so that the first low-frequency antenna 20 and the second low-frequency antenna 30 can be electrically isolated or electromagnetically isolated to improve the isolation between the first low-frequency antenna 20 and the second low-frequency antenna 30. In addition, the first tuning circuit 303 can switch the resonant frequency band of the second low-frequency antenna 30, so that the second low-frequency antenna 30 can support more frequency bands.

[0079] Optionally, the other end of the parasitic radiation section 312 is connected to the second radiation section 211 or an isolation gap is formed between the other end of the parasitic radiation section 312 and the second radiation section 211 .

[0080] In a possible embodiment, Figure 7 As shown, the other end of the parasitic radiation section 312 is connected to the second radiation section 211. In this embodiment, the other end of the parasitic radiation section 312 is connected to the second radiation section 211, which means that the other end of the parasitic radiation section 312 is directly connected to the end of the second radiation section 211 away from the first radiation section 210; or, the other end of the parasitic radiation section 312 is indirectly connected to the end of the second radiation section 211 away from the first radiation section 210 through a conductive member.

[0081] In another possible embodiment, Figure 8 As shown, an isolation gap 3121 is formed between the other end of the parasitic radiation section 312 and the second radiation section 211. The size of the isolation gap 3121 between the parasitic radiation section 312 and the second radiation section 211 can be 0.5 mm to 2 mm. The isolation gap 3121 can be filled with a structural member made of a non-conductive material. By setting the isolation gap 3121, the isolation between the first antenna radiator 201 and the second antenna radiator 301 can be further improved in this embodiment.

[0082] The first resonant current generated by the first low-frequency antenna 20 is mainly distributed along the second edge 105 , and the second resonant current generated by the second low-frequency antenna 30 is mainly distributed along the third edge 106 .

[0083] Specifically, the first low-frequency antenna 20 can generate a first resonant current distributed along the second edge 105 and a first resonant current distributed along the third edge 106 under the excitation of the first feed source 202, wherein the first resonant current distributed along the second edge 105 is a primary current, and the first resonant current distributed along the third edge 106 is a secondary current. In other words, the intensity of the first resonant current distributed along the second edge 105 is greater than the intensity of the first resonant current distributed along the third edge 106. It can be understood that the main radiation direction of the first low-frequency antenna 20 is along the extension direction of the second edge 105, that is, the main radiation direction of the first low-frequency antenna 20 is along the longitudinal direction of the foldable electronic device 1000.

[0084] The second low-frequency antenna 30 can generate a second resonant current distributed along the third edge 106 and a second resonant current distributed along the fourth edge 107 under the excitation of the second feed source 302, wherein the second resonant current distributed along the third edge 106 is a primary current, and the second resonant current distributed along the fourth edge 107 is a secondary current. In other words, the intensity of the second resonant current distributed along the third edge 106 is greater than the intensity of the second resonant current distributed along the fourth edge 107. It can be understood that the main radiation direction of the second low-frequency antenna 30 is along the extension direction of the third edge 106, that is, the main radiation direction of the second low-frequency antenna 30 is along the lateral direction of the foldable electronic device 1000.

[0085] In this way, the main radiation direction of the first low-frequency antenna 20 can be orthogonal to the main radiation direction of the second low-frequency antenna 30, thereby further improving the isolation between the first low-frequency antenna 20 and the second low-frequency antenna 30, achieving co-frequency decoupling of the dual low-frequency antennas, and reducing the envelope correlation coefficient between the first low-frequency antenna 20 and the second low-frequency antenna 30, thereby achieving complementarity between the directional pattern of the first low-frequency antenna 20 and the directional pattern of the second low-frequency antenna 30.

[0086] In the embodiment of the present application, the direction of the first edge 104 and the direction of the third edge 106 can be understood as the horizontal direction of the foldable electronic device 1000, and the direction of the second edge 105 and the direction of the fourth edge 107 can be understood as the vertical direction of the foldable electronic device 1000, which will not be repeated later.

[0087] The foldable electronic device 1000 provided in the present application includes a bendable body 10, a first low-frequency antenna 20 and a second low-frequency antenna 30. Since the first antenna radiator 201 of the first low-frequency antenna 20 includes a first radiating section 210 and a second radiating section 211 connected to each other, the first radiating section 210 is located at the second edge 105 of the bendable body 10, and the second radiating section 211 is located at the third edge 106 of the bendable body 10, the second antenna radiator 301 of the second low-frequency antenna 30 includes a third radiating section 310, a fourth radiating section 311 and a parasitic radiating section 312, the third radiating section 310 is connected to the fourth radiating section 311, the third radiating section 310 is located at the fourth edge 107 of the bendable body 10, and the fourth radiating section 311 is located at the third edge 108 of the bendable body 10. The third edge 106 of the foldable electronic device 1000, the parasitic radiation section 312 is located between the fourth radiation section 311 and the second radiation section 211, that is, the first low-frequency antenna 20 and the second low-frequency antenna 30 are located at two corners of the second body 102 of the bendable body 10, and the first grounding point 2110 of the first low-frequency antenna 20 is located at the third edge 106, and the fourth radiation section 311, the parasitic radiation section 312, and the second feeding point 3110 of the second low-frequency antenna 30 are all located at the third edge 106, so that the current on the radiator of the first low-frequency antenna 20 and the floor current excited by it, and the current on the radiator of the second low-frequency antenna 30 are less affected by the folding state of the foldable electronic device 1000, thereby improving the communication performance of the foldable electronic device 1000. In addition, the free end of the first antenna radiator 201 is away from the second low-frequency antenna 30, the first tuning circuit 303 increases the electrical isolation between the first low-frequency antenna 20 and the second low-frequency antenna 30, and the first low-frequency antenna 20 generates a first resonant current mainly distributed along the second edge 105, and the second low-frequency antenna 30 generates a second resonant current mainly distributed along the third edge 106, thereby ensuring the isolation between the two low-frequency antennas simultaneously located on the second body 102, reducing the envelope correlation coefficient between the two, and achieving the complementarity of the directional diagrams, thereby improving the communication performance of the foldable electronic device 1000.

[0088] It can be understood that in the present application, the first low-frequency antenna 20 includes a first radiation section 210 and a second radiation section 211, the second radiation section 211 is located at the third edge 106, and the second radiation section 211 is provided with the first grounding point 2110, the second low-frequency antenna 30 includes a third radiation section 310, a fourth radiation section 311 and a parasitic radiation section 312, the fourth radiation section 311 and the parasitic radiation section 312 are located at the third edge 106, and the fourth radiation section 311 or the parasitic radiation section 312 is provided with the second feeding point 3110, thereby reducing the influence of the folding state of the foldable electronic device 1000 on the radiation efficiency of the first low-frequency antenna 20 and the radiation efficiency of the second low-frequency antenna 30. In addition, by making the first radiation section 210 away from one end of the second radiation section 211 to form the free end of the first antenna radiator 201, the other end of the parasitic radiation section 312 is grounded through the first tuning circuit 303, and the first resonant current generated by the first low-frequency antenna 20 is mainly distributed along the second edge 105, and the second resonant current generated by the second low-frequency antenna 30 is mainly distributed along the third edge 106, the isolation between the first low-frequency antenna 20 and the second low-frequency antenna 30 is improved, the similarity between the directional pattern of the first low-frequency antenna 20 and the directional pattern of the second low-frequency antenna 30 is reduced, and the complementarity between the directional pattern of the first low-frequency antenna 20 and the directional pattern of the second low-frequency antenna 30 is achieved. In addition, the communication performance of the foldable electronic device 1000 can be improved.

[0089] In a possible embodiment, Fig. 9 As shown, the connection between the first radiation section 210 and the second radiation section 211 forms a first connection point 203. The length of the second radiation section 211 between the first grounding point 2110 and the first connection point 203 is less than the length of the first radiation section 210.

[0090] The length of the first radiation section 210 can be referred to in the attached Fig. 9 The length of the second radiation segment 211 between the first grounding point 2110 and the first connection point 203 can be referred to in the attached Fig. 9 As shown in FIG. 1 , L2 is smaller than L1.

[0091] In a possible implementation, Fig.10 As shown, the first grounding point 2110 may be located at an end of the second radiation segment 211 away from the first radiation segment 210. At this time, the length of the second radiation segment 211 between the first grounding point 2110 and the first connection point 203 is less than the length of the first radiation segment 210, that is, the length of the second radiation segment 211 is less than the length of the first radiation segment 210.

[0092] For example: the length of the second radiation segment 211 between the first grounding point 2110 and the first connection point 203 can be less than or equal to 1 / 2 of the length of the first radiation segment 210; or, the length of the second radiation segment 211 between the first grounding point 2110 and the first connection point 203 can be less than or equal to 1 / 4 of the length of the first radiation segment 210.

[0093] The length of the second radiation section 211 between the first grounding point 2110 and the first connection point 203 is shorter than the length of the first radiation section 210, so that the first antenna radiator 201 generates more first resonant current distributed along the second edge 105 under the excitation of the first feed source 202, while the first resonant current distributed along the third edge 106 generated by the first antenna radiator 201 under the excitation of the first feed source 202 returns to the ground from the first grounding point 2110, that is, the first antenna radiator 201 generates less first resonant current distributed along the third edge 106 under the excitation of the first feed source 202, which is more conducive to making the first resonant current generated by the first low-frequency antenna 20 mainly distributed along the second edge 105, so as to improve the isolation between the first low-frequency antenna 20 and the second low-frequency antenna 30, reduce the envelope correlation coefficient between the two, and achieve complementarity of the directional diagrams, thereby improving the communication performance of the foldable electronic device 1000.

[0094] In a possible embodiment, Fig.11 As shown, the connection between the third radiation section 310 and the fourth radiation section 311 forms the second connection point 305. The sum of the length of the fourth radiation section 311 and the length of the parasitic radiation section 312 is greater than the length of the third radiation section 310 between the second grounding point 3101 and the second connection point 305.

[0095] The sum of the length of the fourth radiation section 311 and the length of the parasitic radiation section 312 can be referred to in the attached Fig.11 The length of the third radiation segment 310 between the second grounding point 3101 and the second connection point 305 can be referred to in the attached Fig.11 As shown in L5. It can be understood that the sum of L3 and L4 is greater than L5.

[0096] In a possible implementation manner, the second grounding point 3101 is located at an end of the third radiation segment 310 away from the fourth radiation segment 311. The length of the third radiation segment 310 between the second grounding point 3101 and the second connection point 305 is the length of the third radiation segment 310. In this implementation manner, the sum of the length of the fourth radiation segment 311 and the length of the parasitic radiation segment 312 is greater than the length of the third radiation segment 310.

[0097] Optionally, the length of the fourth radiation segment 311 may be greater than the length of the parasitic radiation segment 312, that is, L3 may be greater than L4; or, the length of the fourth radiation segment 311 may be less than or equal to the length of the parasitic radiation segment 312, that is, L3 may be less than or equal to L4.

[0098] The sum of the length of the fourth radiation segment 311 and the length of the parasitic radiation segment 312 is greater than the length of the third radiation segment 310 between the second grounding point 3101 and the second connection point 305, so that the second antenna radiator 301 generates less second resonant current distributed along the second edge 105 under the excitation of the second feed source 302, while the second antenna radiator 301 generates more second resonant current distributed along the third edge 106 under the excitation of the second feed source 302, which is more conducive to making the second resonant current generated by the second low-frequency antenna 30 mainly distributed along the third edge 106, so as to improve the isolation between the first low-frequency antenna 20 and the second low-frequency antenna 30, reduce the envelope correlation coefficient between the two, and achieve complementarity of the directional diagram, thereby improving the communication performance of the foldable electronic device 1000.

[0099] In a possible embodiment, Fig.12 As shown, the length of the parasitic radiation section 312 is less than the sum of the length of the third radiation section 310 and the length of the fourth radiation section 311 between the second grounding point 3101 and the second connection point 305 .

[0100] The length of the parasitic radiation section 312 can be referred to in the attached Fig.12 The sum of the length of the third radiation section 310 between the second grounding point 3101 and the second connection point 305 and the length of the fourth radiation section 311 can be referred to in the attached Fig.12 As shown in FIG. 1 , the sum of L3 and L5 is greater than L4. The sum of the length of the third radiation section 310 and the length of the fourth radiation section 311 between the second grounding point 3101 and the second connection point 305 can be 1 / 4 wavelength corresponding to the resonant frequency band of the second low-frequency antenna 30.

[0101] In a possible implementation manner, the second grounding point 3101 is located at an end of the third radiation segment 310 away from the fourth radiation segment 311. The length of the third radiation segment 310 between the second grounding point 3101 and the second connection point 305 is the length of the third radiation segment 310. In this implementation manner, the length of the parasitic radiation segment 312 is less than the sum of the length of the third radiation segment 310 and the length of the fourth radiation segment 311.

[0102] Optionally, the length of the third radiation segment 310 may be greater than the length of the fourth radiation segment 311 , that is, L5 may be greater than L3; or, the length of the third radiation segment 310 may be less than or equal to the length of the fourth radiation segment 311 , that is, L5 may be less than or equal to L3.

[0103] Please refer to Fig.13 and Fig.14 , the length of the parasitic radiation section 312 is less than the sum of the length of the third radiation section 310 and the length of the fourth radiation section 311 between the second grounding point 3101 and the second connection point 305, so that the second antenna radiator 301 can generate the following under the stimulation of the second feed source 302: Fig.13 The first resonance mode shown by the dashed line and Fig.14 The second resonance mode is shown by the dotted line. The first resonance mode includes a 1 / 4 wavelength resonance current generated by the third radiation segment 310 and the fourth radiation segment 311 under the excitation of the second feed source 302, and at the same time, there is a strong unidirectional current on the parasitic radiation segment 312 returning to the ground from the first tuning circuit 303. The second resonance mode includes a 1 / 4 wavelength resonance current generated by the third radiation segment 310 and the fourth radiation segment 311 under the excitation of the second feed source 302, and at the same time, there is a strong reverse current from the first tuning circuit 303 to the coupling gap 3120 through the parasitic radiation segment 312. The first resonance mode and the second resonance mode generated by the second antenna radiator 301 under the excitation of the second feed source 302 can support different LB frequency bands to expand the resonance frequency band of the second low-frequency antenna 30.

[0104] Among them, the parasitic radiation section 312 has a strong second resonant current in both the first resonant mode and the second resonant mode, which is also conducive to making the second resonant current generated by the second low-frequency antenna 30 mainly distributed along the third edge 106, so as to improve the isolation between the first low-frequency antenna 20 and the second low-frequency antenna 30, reduce the envelope correlation coefficient between the two, and achieve the complementarity of the directional diagram, thereby improving the communication performance of the foldable electronic device 1000.

[0105] Furthermore, if Fig.15 As shown, the second low-frequency antenna 30 may further include a first matching circuit 304 electrically connected between the second feeding point 3110 and the second feed source 302. The first matching circuit 304 may include a capacitor and / or an inductor, etc. The first matching circuit 304 may be directly electrically connected to the second feeding point 3110 or indirectly electrically connected. The first matching circuit 304 may be directly electrically connected to the second feed source 302 or indirectly electrically connected. The first matching circuit 304 is used to adjust the impedance of the second antenna radiator 301.

[0106] By setting up a first matching circuit 304 electrically connected between the second feeding point 3110 and the second feed source 302, the impedance of the second antenna radiator 301 can be adjusted so that the second low-frequency antenna 30 has better impedance matching in both the first resonant mode and the second resonant mode, thereby improving the radiation efficiency of the second low-frequency antenna 30.

[0107] In a possible embodiment, Fig.16 As shown, the connection between the second edge 105 and the third edge 106 forms a floor corner point 108. The distance between the first grounding point 2110 and the floor corner point 108 is less than or equal to 1 / 16 wavelength corresponding to the resonant frequency band of the first low-frequency antenna 20.

[0108] The distance between the first grounding point 2110 and the floor corner point 108 can be referred to in the attached Fig.16 In this embodiment, the second edge 105 and the third edge 106 serve as the edges of the floor in the foldable electronic device 1000.

[0109] In a possible implementation, the first grounding point 2110 may be located at an end of the second radiation section 211 away from the first radiation section 210. At this time, the distance between the first grounding point 2110 and the floor corner point 108 is less than or equal to 1 / 16 wavelength corresponding to the resonant frequency band of the first low-frequency antenna 20, that is, the length of the second radiation section 211 is less than or equal to 1 / 16 wavelength corresponding to the resonant frequency band of the first low-frequency antenna 20.

[0110] For example, the length of the first antenna radiator 201 may be 1 / 4 wavelength corresponding to the resonant frequency band of the first low-frequency antenna 20. The distance between the first grounding point 2110 and the floor corner point 108 may be less than or equal to 1 / 4 of the length of the first antenna radiator 201; or, the distance between the first grounding point 2110 and the floor corner point 108 may be less than or equal to 10 mm.

[0111] like Fig.17 As shown, when the distance between the first grounding point 2110 and the floor corner point 108 is less than or equal to 1 / 16 wavelength corresponding to the resonant frequency band of the first low-frequency antenna 20, at this time, when the distance between the first grounding point 2110 and the floor corner point 108 is small, the current distribution excited by the first antenna radiator 201 on the floor of the foldable electronic device 1000 can refer to the attached Fig.17 As shown by the dotted line. The floor of the foldable electronic device 1000 has both floor currents along the second edge 105 and floor currents along the third edge 106, and the maximum angle between the currents excited on the floor of the foldable electronic device 1000 is close to 90°, and there is no 180° reverse current, so the current cancellation on the floor of the foldable electronic device 1000 can be reduced, thereby reducing the radiation efficiency loss of the first low-frequency antenna 20 and improving the communication performance of the foldable electronic device 1000.

[0112] In a possible embodiment, Fig.18As shown, the length of the first antenna radiator 201 between the first feeding point 2101 and the first grounding point 2110 is less than or equal to 1 / 2 of the length of the first antenna radiator 201 between the first grounding point 2110 and the free end 2102 of the first antenna radiator 201 .

[0113] The length of the first antenna radiator 201 between the first feeding point 2101 and the first grounding point 2110 can be referred to in the attached Fig.18 The length of the first antenna radiator 201 between the first ground point 2110 and the free end 2102 of the first antenna radiator 201 can be referred to in the attached Fig.18 The sum of L8 and L1 shown.

[0114] It can be understood that the first feeding point 2101 can be set relatively close to the first grounding point 2110 and relatively far away from the free end 2102 of the first antenna radiator 201; or, the first feeding point 2101 can be located in the middle position between the first grounding point 2110 and the free end 2102 of the first antenna radiator 201.

[0115] Please refer to Fig.19 and Fig. 20 , the length of the first antenna radiator 201 between the first feeding point 2101 and the first grounding point 2110 is less than or equal to 1 / 2 of the length of the first antenna radiator 201 between the first grounding point 2110 and the free end 2102 of the first antenna radiator 201, so that the first antenna radiator 201 generates the following when excited by the first feed source 202: Fig.19 The third resonance mode shown and Fig. 20 The fourth resonance mode shown. The third resonance mode includes a 1 / 4 wavelength resonance current generated between the first feeding point 2101 and the free end 2102 of the first antenna radiator 201. The fourth resonance mode includes a 1 / 4 wavelength resonance current generated between the first grounding point 2110 and the free end 2102 of the first antenna radiator 201. The third resonance mode and the fourth resonance mode can support different low frequency bands to expand the resonance frequency band of the first low frequency antenna 20.

[0116] In addition, the length of the first antenna radiator 201 between the first feeding point 2101 and the first grounding point 2110 is less than or equal to 1 / 2 of the length of the first antenna radiator 201 between the first grounding point 2110 and the free end 2102 of the first antenna radiator 201, which can reduce the reverse current generated on the first antenna radiator 201 between the first feeding point 2101 and the first grounding point 2110 and the offset of the resonant current of the third resonant mode and the fourth resonant mode, thereby reducing the radiation efficiency loss of the first low-frequency antenna 20 and improving the communication performance of the foldable electronic device 1000.

[0117] Furthermore, if Fig.21 As shown, the first low-frequency antenna 20 may further include a second matching circuit 204 electrically connected between the first feeding point 2101 and the first feed source 202. The second matching circuit 204 may include a capacitor and / or an inductor, etc. The second matching circuit 204 may be directly electrically connected to the first feeding point 2101 or indirectly electrically connected. The second matching circuit 204 may be directly electrically connected to the first feed source 202 or indirectly electrically connected. The second matching circuit 204 is used to adjust the impedance of the first antenna radiator 201.

[0118] By setting up a second matching circuit 204 electrically connected between the first feeding point 2101 and the first feed source 202, the impedance of the first antenna radiator 201 can be adjusted so that the first low-frequency antenna 20 has good impedance matching in both the third resonant mode and the fourth resonant mode, thereby improving the radiation efficiency of the first low-frequency antenna 20.

[0119] Furthermore, if Fig. 22 As shown, the first low-frequency antenna 20 further includes a second tuning circuit 205, one end of the second tuning circuit 205 is electrically connected to the first antenna radiator 201, and the other end is grounded. The second tuning circuit 205 may include a switch, a capacitor and / or an inductor, etc. The second tuning circuit 205 may be directly electrically connected to the first antenna radiator 201, or indirectly electrically connected.

[0120] Optionally, the second tuning circuit 205 may be electrically connected to the first radiation section 210; or, the second tuning circuit 205 may be electrically connected to the second radiation section 211. When the second tuning circuit 205 is electrically connected to the first radiation section 210, the second tuning circuit 205 may be electrically connected between the first feeding point 2101 and the first feed source 202, or may be electrically connected to other positions of the first radiation section 210. When the second tuning circuit 205 is electrically connected to the second radiation section 211, the second tuning circuit 205 may be electrically connected to any position in the second radiation section 211 other than the first grounding point 2110, or may be electrically connected to the first grounding point 2110.

[0121] By providing the second tuning circuit 205 , the resonant frequency band of the first low-frequency antenna 20 can be switched, so that the first low-frequency antenna 20 can support more frequency bands.

[0122] Please refer to Figure 23 to Figure 25 ,in, Fig.24 for Fig.23 A radiation efficiency curve graph of the foldable electronic device 1000 is shown. Fig.25 for Fig.23 The return loss (S11) and isolation curve of the foldable electronic device 1000 are shown.

[0123] Fig.24 The middle curve 9 is a radiation efficiency curve of the first low-frequency antenna 20 . Fig.24 The middle curve 10 is a radiation efficiency curve of the second low-frequency antenna 30 . Fig.24 The middle curve 11 is the free efficiency curve of the first low-frequency antenna 20 . Fig.24 The middle curve 12 is the free efficiency curve of the second low-frequency antenna 30. Fig.24 It can be seen from the figure that the free efficiency of the first low-frequency antenna 20 and the second low-frequency antenna 30 are both good. Fig.24 From the middle curves 11 and 12, it can be seen that the efficiency of the first low frequency antenna 20 in the low frequency band is better than that of the second low frequency antenna 30. In addition, the first low frequency antenna 20 has a better free efficiency in a wider low frequency band, that is, the first low frequency antenna 20 has a better efficiency bandwidth.

[0124] Fig.25 The middle curve 13 is a return loss curve of the first low-frequency antenna 20 . Fig.25 The middle curve 14 is a return loss curve of the second low-frequency antenna 30 . Fig.25 The middle curve 15 is the isolation curve between the first low frequency antenna 20 and the second low frequency antenna 30. Fig.25 It can be seen from curves 13 and 14 that the first low-frequency antenna 20 and the second low-frequency antenna 30 can both support the low-frequency band of 0.7 GHz to 0.8 GHz. It can be seen from curve 15 that the isolation between the first low-frequency antenna 20 and the second low-frequency antenna 30 in the 0.7 GHz to 0.8 GHz band is about -12 dB, and the isolation between the two is very good.

[0125] based on Fig.24 and Fig.25 The results and related technologies Figure 3It can be seen from the comparison of the results that the foldable electronic device 1000 provided in the present application is provided with a bendable body 10, a first low-frequency antenna 20 and a second low-frequency antenna 30, so that the first antenna radiator 201 of the first low-frequency antenna 20 includes a first radiation segment 210 and a second radiation segment 211 connected to each other, the first radiation segment 210 is located at the second edge 105 of the bendable body 10, and the second radiation segment 211 is located at the third edge 106 of the bendable body 10, and the second antenna radiator 301 of the second low-frequency antenna 30 includes a third radiation segment 310, a fourth radiation segment 311 and a parasitic radiation segment 312, the third radiation segment 310 is connected to the fourth radiation segment 311, the third radiation segment 310 is located at the fourth edge 107 of the bendable body 10, the fourth radiation segment 311 is located at the third edge 106 of the bendable body 10, and the parasitic radiation segment 312 is located at the fourth radiation segment Between the radiating section 311 and the second radiating section 211, the first feeding point 2101 of the first antenna radiator 201 is arranged in the first radiating section 210, the first grounding point 2110 of the first antenna radiator 201 is arranged in the second radiating section 211, the free end 2102 of the first low-frequency antenna 20 is far away from the second low-frequency antenna 30, the second feeding point 3110 of the second antenna radiator 301 is arranged in the fourth radiating section 311 or the parasitic radiating section 312, the third radiating section 310 is provided with the second grounding point 3101, one end of the parasitic radiating section 312 forms a coupling gap 3120 with the fourth radiating section 311, and the other end of the parasitic radiating section 312 is grounded through the first tuning circuit 303, which can better improve the radiation efficiency of the first low-frequency antenna 20 and the radiation efficiency of the second low-frequency antenna 30, and enhance the communication performance of the foldable electronic device 1000.

[0126] In addition, by forming a first connection point 203 at a connection point between the first radiation section 210 and the second radiation section 211, the length of the second radiation section 211 between the first grounding point 2110 and the first connection point 203 is less than the length of the first radiation section 210; forming a second connection point 305 at a connection point between the third radiation section 310 and the fourth radiation section 311, the sum of the length of the fourth radiation section 311 and the length of the parasitic radiation section 312 is greater than the length of the third radiation section 310 between the second grounding point 3101 and the second connection point 305; and forming a second connection point 306 at a connection point between the third radiation section 310 and the fourth radiation section 311. 101 and the second connection point 305, and the sum of the length of the third radiation section 310 and the length of the fourth radiation section 311; the second low-frequency antenna 30 may also include a first matching circuit 304 electrically connected between the second feeding point 3110 and the second feed source 302; the connection between the second edge 105 and the third edge 106 forms a floor corner point 108, and the distance between the first grounding point 2110 and the floor corner point 108 is less than or equal to 1 / 16 wavelength corresponding to the resonant frequency band of the first low-frequency antenna 20; the first antenna radiation between the first feeding point 2101 and the first grounding point 2110 The length of the first antenna radiator 201 is less than or equal to 1 / 2 of the length of the first antenna radiator 201 between the first grounding point 2110 and the free end 2102 of the first antenna radiator 201; the first low-frequency antenna 20 may also include a second matching circuit 204 electrically connected to the first feeding point 2101 and the first feed source 202; the first low-frequency antenna 20 also includes a second tuning circuit 205, one end of the second tuning circuit 205 is electrically connected to the first antenna radiator 201, and the other end is grounded; it is possible to achieve that the first resonant current generated by the first low-frequency antenna 20 is mainly distributed along the second edge 105, and the second low-frequency antenna 20 is The second resonant current generated by 30 is mainly distributed along the third edge 106, and reduces the reverse current excited by the second low-frequency antenna 30 on the floor and the reverse current on the radiator, and can realize multiple resonant modes of the first low-frequency antenna 20 and the second low-frequency antenna 30 and support multi-band switching, thereby further improving the radiation efficiency of the first low-frequency antenna 20 and the radiation efficiency of the second low-frequency antenna 30, improving the isolation between the first low-frequency antenna 20 and the second low-frequency antenna 30, reducing the envelope correlation coefficient between the two and realizing the complementarity of the directional diagram, which can further improve the communication performance of the foldable electronic device 1000.

[0127] In short, the foldable electronic device 1000 provided in the present application can improve the radiation efficiency of the first low-frequency antenna 20 and the radiation efficiency of the second low-frequency antenna 30 by designing the structure of the first low-frequency antenna 20 and the second low-frequency antenna 30 and designing the layout of the first low-frequency antenna 20 and the second low-frequency antenna 30 on the bendable body 10, thereby improving the communication performance of the foldable electronic device 1000.

[0128] Among them, when the number of zero points in the radiation pattern of the first low-frequency antenna 20 corresponding to the direction of the second edge 105 is greater than the number of zero points in the radiation pattern of the first low-frequency antenna 20 corresponding to the direction of the third edge 106, and / or the amplitude of the zero point in the radiation pattern of the first low-frequency antenna 20 corresponding to the direction of the second edge 105 is greater than the amplitude of the zero point in the radiation pattern of the first low-frequency antenna 20 corresponding to the direction of the third edge 106, it can be considered that the first resonant current generated by the first low-frequency antenna 20 is mainly distributed along the second edge 105.

[0129] In a possible implementation manner, the number of zero points in the radiation pattern of the first low-frequency antenna 20 corresponding to the second edge 105 may be greater than the number of zero points in the radiation pattern of the first low-frequency antenna 20 corresponding to the third edge 106 .

[0130] In another possible implementation, the number of zero points in the radiation pattern of the first low-frequency antenna 20 corresponding to the direction of the second edge 105 and the number of zero points in the radiation pattern of the first low-frequency antenna 20 corresponding to the direction of the third edge 106 may be the same, and the amplitude of the zero points in the radiation pattern of the first low-frequency antenna 20 corresponding to the direction of the second edge 105 may be greater than the amplitude of the zero points in the radiation pattern of the first low-frequency antenna 20 corresponding to the direction of the third edge 106.

[0131] When the number of zero points in the radiation pattern of the second low-frequency antenna 30 corresponding to the direction of the third edge 106 is greater than the number of zero points in the radiation pattern of the second low-frequency antenna 30 corresponding to the direction of the fourth edge 107; and / or when the amplitude of the zero point in the radiation pattern of the second low-frequency antenna 30 corresponding to the direction of the third edge 106 is greater than the amplitude of the zero point in the radiation pattern of the second low-frequency antenna 30 corresponding to the direction of the fourth edge 107, it can be considered that the second resonant current generated by the second low-frequency antenna 30 is mainly distributed along the third edge 106.

[0132] In a possible implementation manner, the number of zero points in the radiation pattern of the second low-frequency antenna 30 corresponding to the third edge 106 may be greater than the number of zero points in the radiation pattern of the second low-frequency antenna 30 corresponding to the fourth edge 107 .

[0133] In another possible implementation, the number of zero points in the radiation pattern of the second low-frequency antenna 30 corresponding to the direction of the third edge 106 and the number of zero points in the radiation pattern of the second low-frequency antenna 30 corresponding to the direction of the fourth edge 107 may be the same, and the amplitude of the zero points in the radiation pattern of the second low-frequency antenna 30 corresponding to the direction of the third edge 106 may be greater than the amplitude of the zero points in the radiation pattern of the second low-frequency antenna 30 corresponding to the direction of the fourth edge 107.

[0134] like Fig.26 As shown, Fig.26 for Fig.23 The radiation pattern of the first low-frequency antenna 20 in the foldable electronic device 1000 is shown. Since the first low-frequency antenna 20 includes a first radiation section 210 located at the second edge 105 and a second radiation section 211 located at the third edge 106, Fig.26 It can be seen that the radiation pattern of the first low-frequency antenna 20 is a superposition of the patterns generated by the longitudinal resonant current and the transverse resonant current. The number of zero points in the radiation pattern of the first low-frequency antenna 20 corresponding to the direction of the second edge 105 is two (point a and point b). The number of zero points in the radiation pattern of the first low-frequency antenna 20 corresponding to the direction of the third edge 106 is zero. Among them, the direction of the radiation pattern of the first low-frequency antenna 20 corresponding to the second edge 105 can be referred to Fig.26 The direction corresponding to the third edge 106 in the radiation pattern of the first low-frequency antenna 20 can be referred to Fig.26 Therefore, it can be considered that the first resonant current generated by the first low-frequency antenna 20 is mainly distributed along the second edge 105.

[0135] like Fig. 27 As shown, Fig. 27 for Fig.23 The radiation pattern of the second low-frequency antenna 30 in the foldable electronic device 1000 is shown. Since the second low-frequency antenna 30 includes a third radiation section 310 located at the fourth edge 107, and a fourth radiation section 311 and a parasitic radiation section 312 located at the third edge 106, Fig. 27 It can be seen that the radiation pattern of the second low-frequency antenna 30 is a superposition of the patterns generated by the longitudinal resonant current and the transverse resonant current. The number of zero points in the radiation pattern of the second low-frequency antenna 30 corresponding to the direction of the third edge 106 is one (point c), the number of zero points in the radiation pattern of the second low-frequency antenna 30 corresponding to the direction of the fourth edge 107 is one (point d), and the amplitude of the zero point in the radiation pattern of the second low-frequency antenna 30 corresponding to the direction of the third edge 106 is greater than the amplitude of the zero point in the radiation pattern of the second low-frequency antenna 30 corresponding to the direction of the fourth edge 107. Among them, the direction corresponding to the third edge 106 in the radiation pattern of the second low-frequency antenna 30 can be referred to Fig. 27 The direction corresponding to the fourth edge 107 in the radiation pattern of the second low-frequency antenna 30 can be referred to Fig. 27 Therefore, it can be considered that the second resonant current generated by the second low-frequency antenna 30 is mainly distributed along the third edge 106.

[0136] In addition, compared Fig.26 and Fig. 27 It can be seen that the radiation pattern of the first low-frequency antenna 20 is not similar to the radiation pattern of the second low-frequency antenna 30, that is, the envelope correlation coefficient between the first low-frequency antenna 20 and the second low-frequency antenna 30 is low.

[0137] like Fig.28 As shown, Fig.28 for Fig.23 The envelope correlation coefficient curve of the foldable electronic device 1000 is shown. Fig.28 It can be seen from the figure that the envelope correlation coefficient between the first low frequency antenna 20 and the second low frequency antenna 30 is relatively low in the low frequency band of 0.7 GHz to 0.8 GHz.

[0138] like Fig.29 As shown, Fig.29 for Fig.23 Signal coverage diagram of the foldable electronic device 1000 is shown. Fig.29 The middle curve 16 is the signal coverage curve of the first low-frequency antenna 20. Fig.29 The middle curve 17 is the signal coverage curve of the second low-frequency antenna 30. Since the first resonant current generated by the first low-frequency antenna 20 is mainly distributed along the second edge 105, and the second resonant current generated by the second low-frequency antenna 30 is mainly distributed along the third edge 106, that is, the first low-frequency antenna 20 and the second low-frequency antenna 30 both generate transverse current and longitudinal current, and the first low-frequency antenna 20 mainly generates longitudinal current, and the second low-frequency antenna 30 mainly generates transverse current, so from Fig.29 It can be seen that the radiation pattern of the first low-frequency antenna 20 and the radiation pattern of the second low-frequency antenna 30 are complementary, and omnidirectional coverage can be achieved, which can improve the communication performance of the foldable electronic device 1000 and ensure the signal coverage integrity of the foldable electronic device 1000 in a weak signal field.

[0139] Furthermore, if Fig.30As shown, the foldable electronic device 1000 also includes a first circuit board 40 disposed in the first body 101, a second circuit board 50 disposed in the second body 102, a radio frequency chip 60 disposed on the first circuit board 40, and a plurality of medium and high frequency antennas 70. The medium and high frequency antenna 70 includes a plurality of third antenna radiators 701 and a plurality of third feed sources 702 corresponding to the plurality of third antenna radiators 701. The plurality of third feed sources 702 are located on the first circuit board 40 and are electrically connected to the radio frequency chip 60. The first feed source 202 and the second feed source 302 are located on the second circuit board 50 and are electrically connected to the radio frequency chip 60.

[0140] When divided by the number of structural layers, the first circuit board 40 can be one of a single-sided circuit board, a double-sided circuit board, and a multi-layer circuit board. When divided by bending characteristics, the first circuit board 40 can be one of a flexible circuit board, a rigid circuit board, and a rigid-flexible board. When divided by molding process, the first circuit board 40 can be one of a printed circuit board (PCB), a flexible printed circuit board (FPC), a laser direct structuring (LDS), etc. The first circuit board 40 includes a first ground layer.

[0141] When divided by the number of structural layers, the second circuit board 50 can be one of a single-sided circuit board, a double-sided circuit board, and a multi-layer circuit board. When divided by bending characteristics, the second circuit board 50 can be one of a flexible circuit board, a rigid circuit board, and a rigid-flexible board. When divided by molding process, the second circuit board 50 can be one of a printed circuit board (PCB), a flexible printed circuit board (FPC), a laser direct structuring (LDS), etc. The second circuit board 50 includes a second ground layer.

[0142] It can be understood that in the present application, the RF chip 60 is located in the upper half of the foldable electronic device 1000. The RF chip 60 provides RF current to the first feed source 202, the second feed source 302, and the third feed source 702.

[0143] The medium and high frequency antenna described in this application refers to an antenna with a resonant frequency band greater than 1 GHz and less than 3 GHz. This application does not specifically limit the number of third antenna radiators 701 and the number of third feed sources 702. For example: the number of third antenna radiators 701 can be two, three, four, five, etc. In the embodiment of this application, four third antenna radiators 701 are taken as an example. The number of third feed sources 702 can be two, three, four, five, etc. In the embodiment of this application, four third feed sources 702 are taken as an example. The number of third feed sources 702 can be the same as the number of third antenna radiators 701. The third antenna radiator 701 can be a frame antenna radiator or an internal antenna radiator. The material of the third antenna radiator 701 can be metal or alloy, etc. Multiple third antenna radiators 701 can all be located in the first body 101. Multiple third feed sources 702 are all located in the first circuit board 40.

[0144] Since the resonance frequency band of the medium and high frequency antenna 70 is relatively high, multiple third feed sources 702 are arranged on the first circuit board 40 in the first main body 101, which can facilitate the electrical connection of the multiple third feed sources 702 to the RF chip 60, reduce the threading loss caused by board-level differences, and improve the balance of the communication performance of the multiple third antenna radiators 701.

[0145] Among them, the first body 101, the first grounding layer of the first circuit board 40, the second body 102, the second grounding layer of the second circuit board 50, and the conductive structure in the foldable electronic device 1000 that electrically connects at least one of the first body 101, the first grounding layer of the first circuit board 40, the second body 102, and the second grounding layer of the second circuit board 50 can form the floor of the foldable electronic device 1000. The floor of the foldable electronic device 1000 is the part of the earth that is not affected by any grounding configuration and is regarded as conductive. The potential of the floor of the foldable electronic device 1000 is agreed to be zero.

[0146] In the above embodiment, the first grounding point 2110 of the first low-frequency antenna 20 is grounded, which can be understood as the first grounding point 2110 of the first low-frequency antenna 20 is directly or indirectly electrically connected to the floor of the foldable electronic device 1000. In a possible implementation, the first grounding point 2110 of the first low-frequency antenna 20 can be directly or indirectly electrically connected to one of the first body 101, the first grounding layer of the first circuit board 40, the second body 102, and the second grounding layer of the second circuit board 50. The second grounding point 3101 of the second low-frequency antenna 30 is grounded, which can be understood as the second grounding point 3101 of the second low-frequency antenna 30 is directly or indirectly electrically connected to the floor of the foldable electronic device 1000. In a possible implementation, the second grounding point 3101 of the second low-frequency antenna 30 can be directly or indirectly electrically connected to one of the first body 101, the first grounding layer of the first circuit board 40, the second body 102, and the second grounding layer of the second circuit board 50. The first tuning circuit 303 is grounded, which can be understood as the first tuning circuit 303 is directly or indirectly electrically connected to the floor of the foldable electronic device 1000. In a possible implementation, the first tuning circuit 303 may be directly or indirectly electrically connected to one of the first body 101, the first grounding layer of the first circuit board 40, the second body 102, and the second grounding layer of the second circuit board 50. The other end of the second tuning circuit 205 being grounded may be understood as the second tuning circuit 205 being directly or indirectly electrically connected to the floor of the foldable electronic device 1000. In a possible implementation, the other end of the second tuning circuit 205 may be directly or indirectly electrically connected to one of the first body 101, the first grounding layer of the first circuit board 40, the second body 102, and the second grounding layer of the second circuit board 50.

[0147] The foldable electronic device 1000 provided in the present application is designed by a bendable body 10, a first low-frequency antenna 20 and a second low-frequency antenna 30, that is, a first antenna radiator 201 of the first low-frequency antenna 20 includes a first radiating section 210 and a second radiating section 211 connected to each other, the first radiating section 210 is located at a second edge 105 of the bendable body 10, the second radiating section 211 is located at a third edge 106 of the bendable body 10, and a second antenna radiator 301 of the second low-frequency antenna 30 includes a third radiating section 310, a fourth radiating section 311 and a parasitic radiating section 312. The third radiation section 310 is connected to the fourth radiation section 311, the third radiation section 310 is located at the fourth edge 107 of the bendable body 10, the fourth radiation section 311 is located at the third edge 106 of the bendable body 10, and the parasitic radiation section 312 is located between the fourth radiation section 311 and the second radiation section 211, so that the current on the radiator of the first low-frequency antenna 20 and the floor current excited by it, and the current on the radiator of the second low-frequency antenna 30 are less affected by the folding state of the foldable electronic device 1000, thereby improving the communication performance of the foldable electronic device 1000. In addition, through the free end of the first antenna radiator 201, the first tuning circuit 303 and the first low-frequency antenna 20 generate a first resonant current mainly distributed along the second edge 105, and the second low-frequency antenna 30 generates a second resonant current mainly distributed along the third edge 106, which ensures the isolation between the two low-frequency antennas located at the same time in the second body 102, reduces the envelope correlation coefficient of the two, and realizes the complementarity of the directional diagram, thereby improving the communication performance of the foldable electronic device 1000.

[0148] The features mentioned in the specification, claims and drawings can be arbitrarily combined with each other as long as they are meaningful within the scope of this application. Although the embodiments of the present application have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations on the present application. Ordinary technicians in this field can change, modify, replace and modify the above embodiments within the scope of this application, and these improvements and modifications are also regarded as the protection scope of this application.

Claims

1. A foldable electronic device, characterized in that: include: A bendable body, the bendable body comprising a first body, a second body and a shaft assembly, the first body and the second body being rotatably connected via the shaft assembly and being able to present a relatively folded state or an unfolded state, the bendable body having a first edge, a second edge, a third edge and a fourth edge connected end to end in sequence, the first edge being located on a side of the first body away from the shaft assembly, and the third edge being located on a side of the second body away from the shaft assembly; A first low-frequency antenna, comprising a first antenna radiator and a first feed source, wherein the first antenna radiator comprises a first radiating section and a second radiating section connected to each other, the first radiating section is located at the second edge and is provided with a first feeding point, the first feeding point is electrically connected to the first feed source, an end of the first radiating section away from the second radiating section forms a free end of the first antenna radiator, the second radiating section is located at the third edge and is provided with a first grounding point, and the first grounding point is grounded; and A second low-frequency antenna, comprising a second antenna radiator, a second feed source and a first tuning circuit, wherein the second antenna radiator comprises a third radiating section, a fourth radiating section and a parasitic radiating section, wherein the third radiating section is located at the fourth edge and is provided with a second grounding point, the second grounding point is grounded, the fourth radiating section is located at the third edge and is connected to the third radiating section, the parasitic radiating section is located between the fourth radiating section and the second radiating section, a coupling gap is formed between one end of the parasitic radiating section and the fourth radiating section, and the other end is grounded through the first tuning circuit, the fourth radiating section or the parasitic radiating section is provided with a second feeding point, and the second feeding point is electrically connected to the second feed source; The first resonant current generated by the first low-frequency antenna is mainly distributed along the second edge, and the second resonant current generated by the second low-frequency antenna is mainly distributed along the third edge.

2. The foldable electronic device according to claim 1, characterized in that: A first connection point is formed at a connection between the first radiation section and the second radiation section, and a length of the second radiation section between the first grounding point and the first connection point is smaller than a length of the first radiation section.

3. The foldable electronic device according to claim 1, characterized in that: A second connection point is formed at a connection between the third radiation segment and the fourth radiation segment, and a sum of a length of the fourth radiation segment and a length of the parasitic radiation segment is greater than a length of the third radiation segment between the second grounding point and the second connection point.

4. The foldable electronic device according to claim 1, characterized in that: The length of the parasitic radiation segment is less than the sum of the length of the third radiation segment between the second ground point and the second connection point and the length of the fourth radiation segment.

5. The foldable electronic device according to claim 1, characterized in that: A connection point between the second edge and the third edge forms a floor corner point, and a distance between the first grounding point and the floor corner point is less than or equal to 1 / 16 wavelength corresponding to the resonant frequency band of the first low-frequency antenna.

6. The foldable electronic device according to claim 1, characterized in that: A length of the first antenna radiator between the first feeding point and the first ground point is less than or equal to 1 / 2 of a length of the first antenna radiator between the first ground point and a free end of the first antenna radiator.

7. The foldable electronic device according to any one of claims 1 to 6, characterized in that: The first low-frequency antenna also includes a second tuning circuit, one end of which is electrically connected to the first antenna radiator and the other end is grounded; the other end of the parasitic radiation segment is connected to the second radiation segment or an isolation gap is formed between the other end of the parasitic radiation segment and the second radiation segment.

8. The foldable electronic device according to any one of claims 1 to 6, characterized in that: The number of zero points in the radiation pattern of the first low-frequency antenna corresponding to the direction of the second edge is greater than the number of zero points in the radiation pattern of the first low-frequency antenna corresponding to the direction of the third edge, and / or the amplitude of the zero points in the radiation pattern of the first low-frequency antenna corresponding to the direction of the second edge is greater than the amplitude of the zero points in the radiation pattern of the first low-frequency antenna corresponding to the direction of the third edge; The number of zero points in the radiation pattern of the second low-frequency antenna corresponding to the direction of the third edge is greater than the number of zero points in the radiation pattern of the second low-frequency antenna corresponding to the direction of the fourth edge; and / or the amplitude of the zero points in the radiation pattern of the second low-frequency antenna corresponding to the direction of the third edge is greater than the amplitude of the zero points in the radiation pattern of the second low-frequency antenna corresponding to the direction of the fourth edge.

9. The foldable electronic device according to claim 8, characterized in that: The number of zero points in the radiation pattern of the first low-frequency antenna corresponding to the direction of the second edge is two, and the number of zero points in the radiation pattern of the first low-frequency antenna corresponding to the direction of the third edge is zero.

10. The foldable electronic device according to claim 8, characterized in that: The number of zero points in the radiation pattern of the second low-frequency antenna corresponding to the direction of the third edge is one, the number of zero points in the radiation pattern of the second low-frequency antenna corresponding to the direction of the fourth edge is one, and the amplitude of the zero point in the radiation pattern of the second low-frequency antenna corresponding to the direction of the third edge is greater than the amplitude of the zero point in the radiation pattern of the second low-frequency antenna corresponding to the direction of the fourth edge.

11. The foldable electronic device according to any one of claims 1 to 6, characterized in that: The radiation pattern of the first low-frequency antenna is complementary to the radiation pattern of the second low-frequency antenna.

12. The foldable electronic device according to any one of claims 1 to 6, characterized in that: The foldable electronic device also includes a first circuit board arranged in the first body, a second circuit board arranged in the second body, a radio frequency chip arranged on the first circuit board, and multiple medium and high frequency antennas, the medium and high frequency antennas include multiple third antenna radiators and multiple third feed sources corresponding to the multiple third antenna radiators respectively, the multiple third feed sources are located on the first circuit board and electrically connected to the radio frequency chip, the first feed source and the second feed source are located on the second circuit board and electrically connected to the radio frequency chip.

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