CN115579618A

CN115579618A - Foldable electronic device

Info

Publication number: CN115579618A
Application number: CN202211243807.9A
Authority: CN
Inventors: 杨东旭
Original assignee: Guangdong Oppo Mobile Telecommunications Corp Ltd
Current assignee: Guangdong Oppo Mobile Telecommunications Corp Ltd
Priority date: 2022-10-11
Filing date: 2022-10-11
Publication date: 2023-01-06
Also published as: WO2024078533A1

Abstract

The application discloses a foldable electronic device.A first antenna assembly is arranged on a first frame and comprises a first feed source, a first radiation section and a second radiation section, wherein a first coupling gap is formed between the first radiation section and the second radiation section, and the first antenna assembly is used for generating resonance of a first frequency band; the first coupling branch section is arranged on the second frame and comprises a first coupling section and a second coupling section, and a second coupling gap is formed between the first coupling section and the second coupling section; the second antenna assembly is arranged on the second frame and comprises a second feed source and a second radiating body, the second radiating body is connected with the first coupling branch and grounded at the connection part, and the second antenna assembly generates resonance of the first frequency band; when the second frame and the first frame are folded, the second radiator is not overlapped with the first radiator, the second coupling gap is overlapped with the first coupling gap, the first coupling section is coupled with the first radiation section, and the second coupling section is coupled with the second radiation section, so that the communication performance is improved.

Description

Foldable electronic device

Technical Field

The application relates to the technical field of electronics, in particular to foldable electronic equipment.

Background

With the development of network technology, people have higher and higher requirements on the data transmission rate of communication equipment. With the development of multi-form and portability of electronic devices, foldable electronic devices become a new product form, and how to improve the communication performance of foldable electronic devices becomes a technical problem to be solved.

Disclosure of Invention

The application provides a foldable electronic device capable of improving communication performance.

The application provides a foldable electronic device, comprising:

the shell assembly comprises a first frame, a rotating shaft and a second frame, and the first frame and the second frame are rotatably connected through the rotating shaft;

the first antenna assembly is arranged on the first frame and comprises a first feed source and a first radiating body, the first radiating body comprises a first radiating section and a second radiating section, a first coupling gap is formed between the first radiating section and the second radiating section, and the first feed source is connected with the first radiating section and used for exciting the first radiating section to generate resonance of a first frequency band;

the first coupling branch section is arranged on the second frame and comprises a first coupling section and a second coupling section, and a second coupling gap is formed between the first coupling section and the second coupling section; and

the second antenna assembly is arranged on the second frame and comprises a second feed source and a second radiating body, the second radiating body is connected with the first coupling branch knot and is grounded at the connection part, and the second feed source is connected with the second radiating body and is used for exciting the second radiating body to generate resonance of the first frequency band;

when the second frame and the first frame are folded, the second radiator is not overlapped with the first radiator, the second coupling gap is overlapped with the first coupling gap, the first coupling section is coupled with the first radiation section, and the second coupling section is coupled with the second radiation section.

The foldable electronic device provided by the application is characterized in that the first antenna assembly is arranged on the first frame, the second antenna assembly and the first coupling branch are arranged on the second frame, when the first frame and the second frame are folded, the first radiator of the first antenna assembly is not overlapped with the second radiator of the second antenna assembly, so that the isolation between the first antenna assembly and the second antenna assembly is improved, the mutual interference between the first antenna assembly and the second antenna assembly is reduced, the first coupling section of the first coupling branch is coupled with the first radiation section of the first radiator, the second coupling section of the first coupling branch is coupled with the second radiation section of the first radiator, the first coupling gap on the first radiator is overlapped with the second coupling gap on the first coupling branch, so that the situation that the clearance interval of the first antenna assembly is reduced due to the fact that the first coupling gap is shielded by the second frame is avoided, the radiation performance of the support frequency band of the first antenna assembly is improved through the coupling effect of the first coupling branch, and further the communication performance of the foldable electronic device is improved.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required to be used in the embodiments will be briefly described below.

Fig. 1 is a schematic structural diagram of a foldable electronic device provided in an embodiment of the present application;

FIG. 2 is a schematic diagram of a first coupling branch of the foldable electronic device shown in FIG. 1 having a tuning circuit;

FIG. 3 is a schematic diagram of a first coupling branch of the foldable electronic device shown in FIG. 1 with another tuning circuit;

fig. 4 is a schematic structural diagram of a first tuning circuit provided in an embodiment of the present application;

fig. 5 is a schematic structural diagram of a second tuning circuit provided in an embodiment of the present application;

fig. 6 is a schematic structural diagram of a first combination form of a first radiator and a frame according to an embodiment of the present disclosure;

fig. 7 is a schematic structural diagram of a second combination form of a first radiator and a bezel according to an embodiment of the present application;

fig. 8 is a schematic structural diagram of a first antenna assembly, a second antenna assembly, a third antenna assembly, and a fourth antenna assembly provided in the present application;

fig. 9 is a schematic structural diagram of a first coupling branch and a second coupling branch provided in the embodiment of the present application and disposed on two sides of a battery;

fig. 10 is a schematic structural diagram of a first control module and a low-frequency antenna group according to an embodiment of the present application;

fig. 11 is a detailed structural schematic diagram of a first control module and a low-frequency antenna set according to an embodiment of the present application;

fig. 12 is a schematic structural diagram of a first and second control module and an intermediate frequency antenna group according to an embodiment of the present application;

fig. 13 is a schematic structural diagram of a second control module and an intermediate frequency antenna group according to an embodiment of the present application;

fig. 14 is a detailed structural diagram of a first and second control module and an intermediate frequency antenna group according to an embodiment of the present application;

fig. 15 is a schematic structural diagram of a third control module and a first high-frequency antenna group according to an embodiment of the present application;

fig. 16 is a detailed structural schematic diagram of a third control module and a first high-frequency antenna group provided in the embodiment of the present application;

fig. 17 is a detailed structural schematic diagram of a third control module and a second high-frequency antenna group provided in the embodiment of the present application;

FIG. 18 is a schematic structural diagram of a Wi-Fi antenna group provided in an embodiment of the present application;

fig. 19 is a schematic structural diagram of a GPS antenna set provided in an embodiment of the present application;

fig. 20 is a schematic structural diagram of a bluetooth antenna group according to an embodiment of the present application;

fig. 21 is a schematic structural diagram of an NFC antenna in common according to an embodiment of the present application;

fig. 22 is a schematic structural diagram of a partial radiator for SAR detection in an embodiment of the present application.

The reference numbers illustrate:

a foldable electronic device 1000; a housing assembly 200; an antenna system 100; a first frame 210; a rotating shaft 220; a second bezel 230; an antenna assembly 400; a first feed source S1; a first radiator 11; a first coupling branch 43; a first coupling slit 44; a first radiating section 421; a second radiating section 422; a second coupling slit 45; a first radiating section 421; a second radiating section 422; a first coupling section 431; a second coupling segment 432; a first tuning circuit N1; an antenna switch N11; a tuning branch N12; a top edge 215; a first side edge 211; a second side edge 212; a second bezel 230; a bottom edge 216; a third side 213; a fourth side 214; a battery 500; a first control module 510; a first antenna element ANT-1; a second antenna component ANT-2; a third antenna element ANT-3; a fourth antenna element ANT-4; a fifth antenna component ANT-5; a sixth antenna component ANT-6; a seventh antenna element ANT-7; an eighth antenna component ANT-8; a ninth antenna element ANT-9; a tenth antenna element ANT-10; an eleventh antenna component ANT-11; a twelfth antenna element ANT-12; an NFC antenna assembly ANT-13; a second coupling branch 46; a third coupling section 461; the fourth coupling segment 462; a third coupling slit 47; a fourth coupling slot 48; a first radiator 11; a first feed source S1; a first ground terminal 21; a second ground terminal 22; a first regulating circuit T1; a second regulating circuit T2; a third radiator 13; a third feed S3; a third ground terminal 23; a first open end 31; a second radiator 12; a second feed S2; a fourth ground terminal 24; a fifth ground terminal 25; a third regulating circuit T3; a first matching circuit M1; a fourth regulating circuit T4; a first switching unit 511; a first rf receiving module 512; a first radio frequency transceiver module 513; a second control module 520; the fourth radiator 14; a fourth feed S4; a sixth ground terminal 26; a second open end 32; a fifth regulating circuit T5; a second matching circuit M2; a fifth radiator 15; a fifth feed source S5; a seventh ground terminal 27; a third open end 33; a sixth regulating circuit T6; a sixth radiator 16; a sixth feed S6; a fifth ground terminal 25; eighth ground terminal 28 seventh regulating circuit T7; an eighth regulating circuit T8; a first break 51; a first master control module 521; a first control switch 522; a second master control module 523; a second control switch 524; a third control module 530; a seventh radiator 17; a seventh feed S7; a sixth ground 26; a ninth ground terminal 29; a second break 52; an eighth radiator 18; an eighth feed S8; a tenth ground terminal 60; a fourth open end 34; a ninth radiator 19; a ninth feed S9; an eleventh ground terminal 61; a fifth open end 35; a ninth regulating circuit T9; a third master control module 531; a third control switch 532; a fourth master control module 533; a fourth control switch 534; an eleventh feed S11; an eleventh radiator 111; a sixth open end 36; a twelfth ground terminal 62; an NFC antenna assembly ANT-13; an isolation capacitor C1; a proximity sensing sensor 70; at least one isolation inductance L1.

Detailed Description

The technical solutions in the embodiments of the present application will be described clearly and completely with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only some embodiments of the present application, and not all embodiments. Furthermore, reference in the specification to "an embodiment" or "an implementation" means that a particular feature, structure, or characteristic described in connection with the embodiment or implementation can be included in at least one embodiment of the specification. The appearances of the phrase in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. It is explicitly and implicitly understood by a person skilled in the art that the embodiments described herein can be combined with other embodiments.

The terms "first," "second," and the like in the description and claims of the present application and in the above-described drawings are used for distinguishing between different objects and not for describing a particular order. Furthermore, the terms "include" and "have," as well as any variations thereof, are intended to cover a non-exclusive inclusion.

With the development of multi-form and portability of electronic devices, foldable electronic devices become a new product form. However, how to design the antenna layout on the foldable electronic device enables the foldable electronic device to have good communication performance in the folded state and the unfolded state, and improves the user experience.

The foldable electronic device in the embodiment of the present application may be a mobile phone, a tablet computer, a desktop computer, a laptop computer, an electronic reader, a handheld computer, an electronic display screen, a notebook computer, an ultra-mobile personal computer (UMPC), a netbook, and a foldable device such as a cellular phone, a Personal Digital Assistant (PDA), an Augmented Reality (AR) \ Virtual Reality (VR) device, a media player, and an intelligent wearable device. It will be appreciated that the foldable electronic device may be a foldable display device or a foldable non-display device. In the present application, the foldable electronic device is taken as an example of a foldable mobile phone, and other devices may refer to the detailed description in the present application.

Referring to fig. 1, the foldable electronic device 1000 includes a housing assembly 200 and an antenna system 100.

The housing assembly 200 is a foldable structure. Alternatively, the housing assembly 200 includes, but is not limited to, a folded-in structure having one rotation axis, and may also be a three-folded, four-folded structure having two or more rotation axes. The present embodiment will be described by taking the housing assembly 200 as a double-folded structure as an example.

Specifically, referring to fig. 1, the housing assembly 200 includes a first frame 210, a shaft 220 and a second frame 230. The first frame 210 and the second frame 230 are rotatably connected by the shaft 220. It is understood that at least one of the first frame 210 and the second frame 230 can rotate around the rotating shaft 220 until the first frame 210 and the second frame 230 are overlapped, and at this time, the housing assembly 200 and the foldable electronic device 1000 are in a folded state, or a closed state. At least one of the first frame 210 and the second frame 230 can rotate around the rotating shaft 220 until an included angle of 90 °, 150 °, and 170 ° is formed between the first frame 210 and the second frame 230, and at this time, the housing assembly 200 and the foldable electronic device 1000 are in the unfolded state. When the first frame 210 and the second frame 230 rotate around the rotating shaft 220 to form an included angle of 180 ° between the first frame 210 and the second frame 230, the housing assembly 200 and the foldable electronic device 1000 are in a flat state.

For convenience of description, the connection direction of the first frame 210, the rotation shaft 220, and the second frame 230 is defined as the Y-axis direction, and the extending direction of the rotation shaft 220 is defined as the X-axis direction. The thickness direction of the case assembly 200 in the unfolded state is the Z-axis direction. Wherein, the X-axis direction, the Y-axis direction and the Z-axis direction are vertical to each other. Wherein the direction indicated by the arrow is the forward direction. The left side in this context means the positive direction of the X-axis, and the right side means the negative direction of the X-axis; the top side is the positive direction of the Y axis, and the bottom side is the negative direction of the Y axis; the front side means the positive direction of the Z axis, and the rear side means the negative direction of the Z axis.

Generally, the first frame 210 and the second frame 230 are made of metal or have metal material. When the first frame 210 is provided with an antenna and the first frame 210 and the second frame 230 are folded, the clearance of the antenna on the first frame 210 is small due to the shielding of the second frame 230, so that the performance of the antenna is poor when the antenna is folded.

Referring to fig. 1, an antenna system 100 provided in the present application includes a first antenna element ANT-1. The first antenna assembly ANT-1 includes a first feed source S1 and a first radiator 11. The first radiator 11 is electrically connected to the first feed S1. The first feed source S1 is used for exciting the first radiator 11 to receive and transmit electromagnetic wave signals.

Referring to fig. 1, the first antenna element ANT-1 is disposed on the first frame 210. The first radiator 11 is disposed on the first bezel 210. Optionally, the first radiator 11 is disposed along the extending direction of the first frame 210. The first radiator 11 includes a first radiation segment 421 and a second radiation segment 422, and a first coupling gap 44 is formed between the first radiation segment 421 and the second radiation segment 422. The first radiation section 421 is coupled to the second radiation section 422 through the first coupling slit 44.

The first feed source S1 is connected to the first radiation section 421, and is configured to excite the first radiation section 421 to generate a resonance in a first frequency band. Alternatively, the first radiating section 421 is far from the rotating shaft 220 relative to the second radiating section 422, or the first radiating section 421 is close to the rotating shaft 220 relative to the second radiating section 422.

Referring to fig. 1, the antenna system 100 further includes a first coupling branch 43, and the first coupling branch 43 is disposed on the second frame 230. Optionally, the first coupling branch 43 is disposed along the direction in which the second frame 230 extends.

Referring to fig. 1, the first coupling branch 43 includes a first coupling segment 431 and a second coupling segment 432, and a second coupling gap 45 is formed between the first coupling segment 431 and the second coupling segment 432.

Referring to fig. 1 and fig. 2, the antenna system 100 further includes a second antenna element ANT-2, where the second antenna element ANT-2 is disposed on the second frame 230. The second antenna assembly ANT-2 includes a second feed source S2 and a second radiator 12, where the second radiator 12 is connected to the first coupling branch 43 and grounded at the connection. The second feed S2 is connected to the second radiator 12, and is configured to excite the second radiator 12 to generate resonance in the first frequency band.

It is understood that the first antenna element ANT-1 and the second antenna element ANT-2 are both used for generating resonance in the first frequency band, i.e., the first antenna element ANT-1 and the second antenna element ANT-2 can both support the first frequency band. The first frequency band is not limited in this application.

When the first frame 210 and the second frame 230 are folded, the second radiator 12 does not overlap the first radiator 11, the second coupling slot 45 overlaps the first coupling slot 44, the first coupling segment 431 is coupled to the first radiation segment 421, and the second coupling segment 432 is coupled to the second radiation segment 422.

Optionally, the first coupling branch 43 is made of a conductive material.

When the first frame 210 and the second frame 230 are folded, the second radiator 12 and the first radiator 11 do not overlap, that is, radiators for supporting the first antenna assembly ANT-1 and the second antenna assembly ANT-2 of the same frequency band (first frequency band) do not overlap in a folded state, so as to reduce mutual interference between the first antenna assembly ANT-1 and the second antenna assembly ANT-2, improve isolation between the first antenna assembly ANT-1 and the second antenna assembly ANT-2, and improve radiation efficiency of the first frequency band.

The second coupling slot 45 overlaps the first coupling slot 44, so as to prevent the second frame 230 made of a metal material from shielding the first coupling slot 44, which results in a small radiation clearance space of the first antenna element ANT-1 and a reduction in radiation efficiency of the first antenna element ANT-1.

The first coupling segment 431 is coupled to the first radiation segment 421, and the second coupling segment 432 is coupled to the second radiation segment 422, where the first coupling segment 431 and the second coupling segment 432 may tune a radiator impedance of the second antenna assembly ANT-2, so as to improve radiation efficiency of the first antenna assembly ANT-1 for the first frequency band after being folded.

For example, if the frequency band supported by the first radiator 11 in the unfolded state is f1, and the frequency band supported by the first radiator 11 in the folded state is f2, that is, the frequency band supported by the first radiator 11 can be shifted in frequency, and the first coupling branch 43 is added to couple with the first radiator 11 when folded, so that the frequency band supported by the first radiator 11 in the folded state is f1, thereby ensuring that the foldable electronic device 1000 can better support f1 in both the unfolded state and the folded state, and improving the radiation performance of the antenna assembly 400. Or, if the frequency band supported by the first radiator 11 in the folded state is f1, the efficiency of the first radiator 11 in the folded state for supporting f1 is reduced, and the efficiency of the first radiator 11 in the folded state for supporting the f1 frequency band is improved by increasing the coupling of the first coupling branch 43 with the first radiator 11 in the folded state.

In other words, the first coupling branch 43 and the first radiator 11 reconstruct a new radiation branch of the first antenna assembly ANT-1, so that the impedance of the radiator of the first antenna assembly ANT-1 matches with a frequency band required to be supported, which can not only prevent the clearance from being reduced due to the shielding of the second frame 230 on the first antenna assembly ANT-1, but also enable the first coupling branch 43 on the second frame 230 to be a part of the first antenna assembly ANT-1, thereby improving the radiation performance of the first antenna assembly ANT-1 in the folded state, and ensuring that the first antenna assembly ANT-1 has better antenna performance when being unfolded and folded.

In the foldable electronic device 1000 provided by the present application, the first antenna element ANT-1 is disposed on the first frame 210, the second antenna element ANT-2 and the first coupling branch 43 are disposed on the second frame 230, when the first frame 210 and the second frame 230 are folded with each other, the first radiator 11 of the first antenna element ANT-1 and the second radiator 12 of the second antenna element ANT-2 do not overlap, so as to improve the isolation between the first antenna element ANT-1 and the second antenna element ANT-2, reduce mutual interference between the first antenna element ANT-1 and the second antenna element ANT-2, the first coupling segment 431 of the first coupling branch 43 is coupled to the first radiation segment 421 of the first radiator 11, the second coupling segment 432 of the first coupling branch 43 is coupled to the second radiation segment 422 of the first antenna element ANT-11, the first coupling slot 44 of the first radiator 11 overlaps with the second coupling slot 45 of the first coupling branch 43, so as to prevent the first coupling slot 44 from being covered by the slot of the second frame 230, thereby improving the clearance of the coupling performance of the first antenna element ANT-1, and further improving the communication performance of the foldable electronic device 1000.

The specific length of the first coupling branch 43 is not specifically limited in the present application. Optionally, the length of the first coupling segment 431 is the same as or different from the length of the first radiating segment 421. The length of the second coupling segment 432 is the same as or different from the length of the second radiating segment 422. In one embodiment, the first coupling segment 431 and the first radiating segment 421 are symmetrically disposed about the rotation axis 220. The second coupling section 432 and the second radiating section 422 are symmetrically disposed about the rotation axis 220. The first coupling slot 44 is arranged symmetrically to the second coupling slot 45. Alternatively, the length of the first coupling segment 431 and the length of the second coupling segment 432 may be the same or different. The lengths of the first coupling section 431 and the second coupling section 432 may be designed according to specific impedance adjustments.

Optionally, referring to fig. 2 and 3, the first antenna element ANT-1 further includes a controller (not shown) and a first tuning circuit N1. The first tuning circuit N1 is electrically connected to the first coupling section 431 and/or the second coupling section 432 of the first coupling branch 43. The controller is electrically connected with the first tuning circuit N1. The first tuning circuit N1 is used for impedance tuning of the first coupling branch 43 to tune the radiation performance of the first radiator 11. The controller is configured to control the first tuning circuit N1 to tune the impedance of the first coupling branch 43 when the foldable electronic device 1000 is folded.

Optionally, referring to fig. 4, the first tuning circuit N1 includes an antenna switch N11 and a plurality of tuning branches N12 electrically connected to the antenna switch N11; and/or, referring to fig. 5, the first tuning circuit N1 includes an adjustable capacitor.

In a first embodiment of the first tuning circuit N1, please refer to fig. 4, the first tuning circuit N1 further includes a plurality of tuning branches N12. The controller is electrically connected with the control end of the antenna switch N11, one end of each of the tuning branches N12 is electrically connected with one end of the antenna switch N11, and the other end of the antenna switch N11 is electrically connected with the first coupling branch 43. Namely, the antenna switch N11 is a single-pole multi-throw switch. The other ends of the tuning branches N12 are all grounded. The tuning branches N12 are used to tune the impedance of the first coupling branch 43, so as to match the impedance of the radiator of the folded first antenna assembly ANT-1, thereby satisfying the support of a required frequency band and improving the radiation performance.

The impedance value of each of the tuning branches N12 is different. For example, the tuning branches N12 are a plurality of capacitor devices having different capacitance values. Alternatively, the tuning branches N12 may be a plurality of inductance devices having different inductance values. Alternatively, the plurality of tuning branches N12 includes a plurality of capacitive devices having different capacitance values and includes a plurality of inductive devices having different inductance values. The antenna switch N11 is adjusted to be electrically connected to different devices, so as to adjust the equivalent electrical length of the tuning branch N12, further adjust the effective electrical length of the first coupling branch 43, and further adjust the impedance matching of the radiator of the folded first antenna assembly ANT-1.

In a second embodiment of the first tuning circuit N1, please refer to fig. 5, the first tuning circuit N1 includes a first tunable capacitor, and the first tunable capacitor is adjustable in size and is used for tuning the impedance of the first coupling branch 43. The controller is electrically connected with the first adjustable capacitor and is used for tuning the size of the first adjustable capacitor. The first adjustable capacitor is a capacitor with an adjustable capacitance value, so that the impedance value of the first tuning circuit N1 is adjustable by adjusting the capacitance value of the capacitor, so as to adjust the equivalent electrical length of the tuning branch N12, further adjust the effective electrical length of the first coupling branch 43, and further adjust the impedance matching of the radiator of the folded first antenna assembly ANT-1.

Of course, the first tuning circuit N1 may also be a combination of the first and second embodiments, for example, the tuning branch N12 includes the first tunable capacitor therein.

When the number of the first coupling branches 43 is multiple, each first coupling branch 43 may be provided with a first tuning circuit N1, so as to implement impedance tuning on each first coupling branch 43, further tune a resonance mode generated by each radiation section, and a supported frequency band, thereby improving the radiation performance of the folded first antenna assembly ANT-1, ensuring that the foldable electronic device 1000 has better antenna performance in both the unfolded state and the folded state, and improving the user experience of internet access.

In an alternative embodiment, referring to fig. 6, the first frame 210 and the second frame 230 are both conductive frames, and the first radiator 11, the second radiator 12 and the first coupling branch 43 are all part of the conductive frames. Specifically, the first frame 210 and the second frame 230 are both metal frames. The first radiator 11 is a part of the first frame 210, and the first coupling branch 43 is a part of the second frame 230. The first coupling gap 44 is a broken seam on the metal bezel and is filled with an insulating material to complete the entire bezel. The specific width of the first coupling gap 44 and the insulating filling material are not limited in this application.

In another alternative embodiment, referring to fig. 7, the first frame 210 and the second frame 230 both include a conductive body 200a and a cladding body 200b cladding the conductive body 200 a. The first radiator 11, the second radiator 12 and the first coupling branch 43 are all part of the conductor 200 a. The covering body 200b is made of a non-conductive material, such as plastic, ceramic, glass, or composite material. The conductor 200a is embedded in the cladding 200b and extends out of the conductive part for electrical connection with the rf transceiver chip, the circuit board, and the like. Of course, in other embodiments, the inner surface of the cover 200b is provided with a groove, and the conductor 200a is provided in the groove of the inner surface of the cover 200b.

The following embodiment will be described by taking the first frame 210 and the second frame 230 as metal frames as an example.

Referring to FIG. 8, the foldable electronic device 1000 includes a top side 215, a first side 211, a second side 212 disposed on the first frame 210, and a bottom side 216, a third side 213, and a fourth side 214 disposed on the second frame 230.

The rotation axis 220 is parallel to the top edge 215 and the bottom edge 216, and extends along the X-axis direction. The first side edge 211 and the second side edge 212 are disposed opposite to each other and both connected between the top edge 215 and the hinge 220. The third side 213 and the fourth side 214 are disposed opposite to each other and both connected between the rotating shaft 220 and the bottom 216. The first side 211 and the third side 213 are overlapped when folded. The first side 211 and the third side 213 are arranged collinearly in the flattened state. The second side edge 212 and the fourth side edge 214 overlap each other in the folded state, and the second side edge 212 and the fourth side edge 214 are arranged collinearly in the flattened state.

Referring to fig. 8, the first antenna element ANT-1 is disposed at the first side 211. The second antenna assembly ANT-2 is disposed at the third side 213. The first radiator 11 is disposed on the first side 211. The first coupling branch 43 is disposed on the third side 213, and the first coupling branch 43 and the first radiator 11 are symmetrically disposed about the rotating shaft 220. The second coupling slot 45 on the first coupling branch 43 and the first coupling slot 44 of the first radiator 11 are symmetrically disposed about the rotating shaft 220. The second radiator 12 is disposed on the third side 213.

The foldable electronic device 1000 further includes a third antenna element ANT-3, a fourth antenna element ANT-4, and a second coupling branch 46.

The third antenna element ANT-3 and the fourth antenna element ANT-4 are disposed at the second side 212. The third antenna element ANT-3 includes a third feed S3 and a third radiator 13. The third feed S3 is electrically connected to the third radiator 13, and is configured to excite the third radiator 13 to generate resonance of the first frequency band. The fourth antenna assembly ANT-4 comprises a fourth feed S4 and a fourth radiator 14 electrically connected to the fourth feed S4, and the fourth radiator 14 generates a resonance supporting a second frequency band under the excitation of the fourth feed S4. The second frequency band and the first frequency band are different frequency bands, for example, the first frequency band is an LB frequency band, and the second frequency band is an MHB frequency band.

A third coupling slot 47 is formed between the third radiator 13 and the fourth radiator 14. The third radiator 13 and the fourth radiator 14 are coupled through a third coupling slot 47 to excite resonance supporting the first frequency band and the second frequency band. In other words, the third antenna element ANT-3 and the fourth antenna element ANT-4 form a common aperture antenna.

The second coupling branch 46 is disposed on the fourth side 214, and the second coupling branch 46 includes a third coupling section 461 and a fourth coupling section 462. A fourth coupling gap 48 is formed between the third coupling segment 461 and the fourth coupling segment 462.

When the second frame 230 and the first frame 210 are folded, the third coupling slot 47 overlaps the fourth coupling slot 48, so as to prevent the third coupling slot 47 from being blocked by the second frame 230 during folding, and the third coupling segment 461 is coupled to the third radiator 13, so as to tune the radiator impedance of the third antenna assembly ANT-3, and improve the radiation efficiency of the third antenna assembly ANT-3 during folding. The fourth coupling segment 462 is coupled to the fourth radiator 14 to tune the radiator impedance of the fourth antenna element ANT-4, so as to improve the radiation efficiency of the fourth antenna element ANT-4 when being folded.

Optionally, a tuning circuit may be disposed on the third coupling segment 461, and the tuning circuit may assist in tuning the radiator impedance matching of the third antenna element ANT-3 during folding.

Optionally, a tuning circuit may be disposed on the fourth coupling segment 462, and the tuning circuit may assist in tuning the radiator impedance matching of the fourth antenna element ANT-4 during folding.

The third coupling segment 461 and the third radiator 13 are symmetrically disposed about the rotating shaft 220. The fourth coupling section 462 and the fourth radiator 14 are symmetrically disposed about the rotation axis 220. The third coupling gap 47 and the fourth coupling gap 48 are symmetrically arranged about the rotation axis 220.

The first antenna assembly ANT-1, the second antenna assembly ANT-2 and the third antenna assembly ANT-3 are all used for supporting a first frequency band, the first frequency band can be low frequency, namely the first antenna assembly ANT-1, the second antenna assembly ANT-2 and the third antenna assembly ANT-3 are all low frequency antennas, when the foldable electronic device 1000 is folded, radiators of the first antenna assembly ANT-1, the second antenna assembly ANT-2 and the third antenna assembly ANT-3 cannot be overlapped, so that the isolation and the radiation efficiency of the low frequency antenna when the foldable electronic device 1000 is folded are improved, and mutual interference among the first antenna assembly ANT-1, the second antenna assembly ANT-2 and the third antenna assembly ANT-3 is reduced; in addition, when the foldable electronic device 1000 is folded, the first coupling slot 44 on the first radiator 11 overlaps the second coupling slot 45 on the first coupling branch 43, and the third coupling slot 47 between the third radiator 13 and the fourth radiator 14 overlaps the fourth coupling slot 48 on the second coupling branch 46, so as to avoid that the clearance of the first antenna assembly ANT-1 and the third antenna assembly ANT-3 is reduced due to the shielding of the first coupling slot 44 and the third coupling slot 47 by the second frame 230 during folding, and the radiator of the first antenna assembly ANT-1 is impedance tuned by the first coupling branch 43, and the radiator of the third antenna assembly ANT-3 is impedance tuned by the second coupling branch 46, so as to improve the radiation efficiency of the first antenna assembly ANT-1 and the third antenna assembly ANT-3 during folding, that is, to improve the radiation efficiency of the low-frequency antenna assembly for transceiving low-frequency signals during folding.

The three low-frequency antennas of the first antenna assembly ANT-1, the second antenna assembly ANT-2 and the third antenna assembly ANT-3 are respectively arranged at a position close to the middle of the left side, a position close to the middle of the right side and a position close to the corner of the bottom side of the foldable electronic device 1000 when the foldable electronic device is unfolded, so that the low-frequency antennas can not be tightly held when the foldable electronic device is held in a vertical screen mode or a horizontal screen mode, and the foldable electronic device is suitable for various handheld environments.

Optionally, referring to fig. 9, the foldable electronic device 1000 further includes a battery 500. The battery 500 is disposed in the area surrounded by the second frame 230 and the rotating shaft 220. Three sides of the battery 500 are disposed next to the third side 213, the rotation shaft 220, and the fourth side 214. Generally, due to the arrangement of the battery 500, the third side 213 is close to the battery 500, and the fourth side 214 is close to the battery 500, so that the space cannot be provided with devices such as a circuit board, and thus, some electronic devices cannot be arranged, which results in wasted space, and by arranging the first coupling branch 43 at the position of the third side 213 close to the battery 500, and arranging the second coupling branch 46 at the position of the fourth side 214 close to the battery 500, the positions of the frames at the two sides of the battery 500 are reasonably utilized, so as to improve the utilization rate on the frame, and the first coupling branch 43 and the second coupling branch 46 do not occupy extra space while realizing the improvement of the antenna performance during folding.

Optionally, the first frequency band includes, but is not limited to, an LB frequency band, an MHB frequency band, an N41 frequency band, a Wi-Fi frequency band, and a bluetooth frequency band. The second frequency band includes but is not limited to LB frequency band, MHB frequency band, N41 frequency band, wi-Fi frequency band, bluetooth frequency band. Wherein, the LB frequency band comprises one or more of 2G, 3G, 4G and 5G frequency bands. The MHB bands include one or more of 2G, 3G, 4G, 5G bands. The Wi-Fi frequency band comprises at least one of a Wi-Fi 2.4G frequency band and a Wi-Fi 5G frequency band. The LB band means a band below 1000MHz (excluding 1000 MHz). The MHB band refers to a band of 1000MHz to 3000MHz (including 1000MHz, excluding 3000 MHz).

The antenna system provided by the present application is specifically described below with reference to the accompanying drawings.

Referring to fig. 10, the antenna system 100 further includes a low frequency antenna group and a first control module 510.

Referring to fig. 10, the low frequency antenna set includes a first antenna element ANT-1, a second antenna element ANT-2, and a third antenna element ANT-3. It is understood that the first antenna element ANT-1, the second antenna element ANT-2 and the third antenna element ANT-3 described herein all include an antenna radiator, an antenna feed source, and the like. The first antenna element ANT-1, the second antenna element ANT-2 and the third antenna element ANT-3 are all capable of transmitting and receiving LB (low frequency) signals. The LB (low frequency) signal includes, but is not limited to, 2G, 3G, 4G, and 5G bands.

Specifically, the first antenna element ANT-1 includes a first radiator 11 and a first feed source S1 electrically connected to the first radiator 11. The first radiator 11 includes a first ground terminal 21 and a second ground terminal 22 that are disposed opposite to each other. The first ground terminal 21 is close to the rotation shaft 220 relative to the second ground terminal 22. A first coupling gap 44 is provided between the first ground terminal 21 and the second ground terminal 22. Optionally, the first feed S1 is electrically connected between the first coupling gap 44 and the second ground 22. Optionally, a first adjusting circuit T1 for tuning a frequency band is disposed between the first feed source S1 and the first radiator 11. Optionally, a second adjusting circuit T2 for tuning the frequency band is also provided between the second ground terminal 22 and the reference ground.

The first adjusting circuit T1 includes, but is not limited to, an antenna switch, a capacitive device, an inductive device, or a combination of elements consisting of a capacitive device and an inductive device. The second adjusting circuit T2 includes, but is not limited to, an antenna switch, a capacitive device, an inductive device, or a combination of elements consisting of a capacitive device and an inductive device. The subsequent other adjusting circuits also include, but are not limited to, an antenna switch, a capacitor device, an inductor device, or a combination of elements consisting of a capacitor device and an inductor device, and are not described in detail in the following.

Specifically, referring to fig. 10, the third radiator 13 includes a third ground 23 and a first open end 31, which are oppositely disposed. The third ground 23 is far from the rotation shaft 220 relative to the first open end 31. Optionally, the third feed S3 is electrically connected between the third ground 23 and the first open end 31. A key flexible circuit board for abutting against the volume key may be disposed between the third feed S3 and the third ground terminal 23, so as to reasonably utilize the space between the devices of the third antenna assembly ANT-3 and improve the space utilization.

The second antenna assembly ANT-2 is disposed at a corner between the bottom side 216 and the third side 213. Specifically, the antenna radiator of the second antenna assembly ANT-2 is disposed at a corner between the bottom side 216 and the third side 213.

Specifically, referring to fig. 10, the second antenna assembly ANT-2 includes a second radiator 12 and a second feed S2 electrically connected to the second radiator 12. The second radiator 12 includes a fourth ground 24 and a fifth ground 25 that are oppositely disposed. The fourth ground terminal 24 is disposed on the third side 213, and the fifth ground terminal 25 is disposed on the bottom side 216. Optionally, a third adjusting circuit T3 for tuning a frequency band is disposed between the second feed source S2 and the second radiator 12. Optionally, the third radiator 13 between the fifth ground 25 and the third adjusting circuit T3 is further electrically connected to a first matching circuit M1 and a fourth adjusting circuit T4. The first matching circuit M1 is electrically connected between the fourth adjusting circuit T4 and the third radiator 13. The fourth regulating circuit T4 is grounded.

The first matching circuit M1 includes, but is not limited to, an antenna switch, a capacitive device, an inductive device, or a combination of elements composed of a capacitive device and an inductive device. The subsequent other matching circuits also include, but are not limited to, an antenna switch, a capacitor device, an inductor device, or a combination of elements including a capacitor device and an inductor device, and are not described in detail in the following.

The first control module 510 electrically connects the first antenna element ANT-1, the second antenna element ANT-2, and the third antenna element ANT-3. The first control module 510 is configured to determine a first target antenna among the first antenna element ANT-1, the second antenna element ANT-2, and the third antenna element ANT-3 according to the signal strengths of the first antenna element ANT-1, the second antenna element ANT-2, and the third antenna element ANT-3, and switch to the first target antenna to transmit a first frequency band. In this embodiment, the first frequency band is a low frequency band.

Optionally, the first antenna element ANT-1, the second antenna element ANT-2 and the third antenna element ANT-3 may receive low frequency signals simultaneously.

Generally, the radiation performance of the antenna unit is affected by the hand holding, for example, different antenna radiators are held in different hand holding postures, which results in low radiation efficiency of the antenna and poor working environment. However, the holding gesture of the user is uncertain, for example, the user holds the foldable electronic device 1000 in a horizontal holding state, a vertical holding state, a folded state, and the like, and if the transmitting antenna (the transmitting antenna is a radiator for transmitting) is held, the foldable electronic device 1000 cannot be connected to the base station or is not connected well, that is, no signal or very weak signal is generated in the foldable electronic device 1000, which results in user experience.

The low-frequency antenna set provided by this embodiment includes a first antenna element ANT-1, a second antenna element ANT-2, and a third antenna element ANT-3, and the first antenna element ANT-1, the second antenna element ANT-2, and the third antenna element ANT-3 are respectively disposed on different sides, such as left and right sides and a bottom side, of the foldable electronic device 1000. Thus, when the foldable electronic device 1000 is in a cross-screen holding state in an unfolded state, the second antenna assembly ANT-2 may be blocked, the detection unit in the first control module 510 may detect that the signal strength of the second antenna assembly ANT-2 is relatively poor, and the signal strengths of the first antenna assembly ANT-1 and the third antenna assembly ANT-3 are relatively good, at this time, the switching unit in the first control module 510 may determine that one or both of the first antenna assembly ANT-1 and the third antenna assembly ANT-3 are the target low-frequency antenna, and switch to the target low-frequency antenna to transmit the low-frequency signal, so as to ensure that the foldable electronic device 1000 has good transceiving performance on the low-frequency signal in the cross-screen holding state.

When the foldable electronic device 1000 is in a vertical screen holding state in an unfolded state, the first antenna element ANT-1 and the third antenna element ANT-3 may be blocked, the detection unit in the first control module 510 may detect that the signal strength of the first antenna element ANT-1 and the third antenna element ANT-3 is relatively poor, and the signal strength of the second antenna element ANT-2 is relatively good, at this time, the switching unit in the first control module 510 may determine that the second antenna element ANT-2 is a target low-frequency antenna, and switch to the target low-frequency antenna to transmit a low-frequency signal, so as to ensure that the foldable electronic device 1000 has good transceiving performance for the low-frequency signal in the vertical screen holding state.

When the foldable electronic device 1000 is in the folded state, because the first antenna element ANT-1 and the third antenna element ANT-3 can both improve the radiation performance of the first antenna element ANT-1 and the third antenna element ANT-3 in the folded state through the coupling effect of the coupling branches, that is, the signal strength of the first antenna element ANT-1 and the third antenna element ANT-3 in the folded state is better, the switching unit in the first control module 510 can determine one or both of the first antenna element ANT-1 and the third antenna element ANT-3 as a target low-frequency antenna and switch to the target low-frequency antenna to transmit a low-frequency signal, so as to ensure that the foldable electronic device 1000 has better transceiving performance for the low-frequency signal in the folded state.

It should be noted that, the above is only to illustrate the beneficial effects of the antenna component layout in the present application in different scenarios, and it is not limited that the antenna component in the above scenarios is necessarily operated in the manner described above.

Specifically, referring to fig. 11, the first control module 510 further includes a first switch unit 511, at least one first rf receiving module 512, and at least one first rf transceiving module 513. The input end of the first switch unit 511 is electrically connected to the first rf receiving module 512 and the first rf transceiving module 513, and the output end of the first switch unit 511 is electrically connected to the first antenna element ANT-1, the second antenna element ANT-2 and the third antenna element ANT-3. When the switching unit in the first control module 510 determines that the first antenna element ANT-1 is the target low frequency antenna, the first switching unit 511 switches to electrically connect the first antenna element ANT-1 to the first rf transceiving module 513, and electrically connect the second antenna element ANT-2 and the third antenna element ANT-3 to the first rf transceiving module 512. When the switching unit in the first control module 510 determines that the second antenna element ANT-2 is the target low frequency antenna, the first switching unit 511 switches the second antenna element ANT-2 to be electrically connected to the first rf transceiver module 513, and the first antenna element ANT-1 and the third antenna element ANT-3 are electrically connected to the first rf receiver module 512. When the switching unit in the first control module 510 determines that the third antenna element ANT-3 is the target low frequency antenna, the first switching unit 511 switches the third antenna element ANT-3 to be electrically connected to the first rf transceiving module 513, and the second antenna element ANT-2 and the first antenna element ANT-1 are electrically connected to the first rf receiving module 512.

The detection and switching process of the first control module 510 is a real-time dynamic process. That is, the detection unit in the first control module 510 detects the signal receiving strength of the first antenna assembly ANT-1, the second antenna assembly ANT-2, and the third antenna assembly ANT-3 in real time, and the first control module 510 may dynamically adjust the first switch unit 511 in real time according to the usage scenario to implement intelligent switching, so as to ensure that the antenna with the optimal or better signal strength is used as the transmitting antenna and the other antennas are used as the receiving antennas no matter how the working environment of the foldable electronic device 1000 changes (or how the hand-holding posture changes), so as to maintain the better signal quality of the transmitting antenna in different hand-holding postures, improve the signal stability of the foldable electronic device 1000, and ensure that the user has the best signal in real time.

Optionally, the first control module 510 is further configured to select two of the first antenna element ANT-1, the second antenna element ANT-2, and the third antenna element ANT-3 to transmit the first low frequency signal and the second low frequency signal, and control all of the first antenna element ANT-1, the second antenna element ANT-2, and the third antenna element ANT-3 to receive the low frequency signal. The first low-frequency signal and the second low-frequency signal are different, for example, the first low-frequency signal is B20, and the second low-frequency signal is N28, so that two different low-frequency bands (i.e., L + L) are simultaneously supported by three antennas, the number of required antennas is reduced, occupied space is saved, and a space condition is created for arranging other antennas for the foldable electronic device 1000.

Optionally, referring to fig. 12, the antenna system 100 further includes an intermediate frequency antenna group and a second control module 520.

The intermediate frequency antenna group comprises a first antenna component ANT-1, a fifth antenna component ANT-5, a fourth antenna component ANT-4 and a sixth antenna component ANT-6. It should be understood that the fifth antenna element ANT-5, the fourth antenna element ANT-4, and the sixth antenna element ANT-6 described herein all include an antenna radiator, an antenna feed, and the like. The first antenna element ANT-1, the fifth antenna element ANT-5, the fourth antenna element ANT-4 and the sixth antenna element ANT-6 can transmit and receive MHB (medium-high frequency) signals. MHB (medium to high frequency) signals include, but are not limited to, 2G, 3G, 4G, 5G bands. When the first antenna element ANT-1, the fifth antenna element ANT-5, the fourth antenna element ANT-4 and the sixth antenna element ANT-6 support the NR MHB, the N1, N3, N7 and N41 frequency bands can be supported.

Referring to fig. 12, the fourth antenna element ANT-4 is disposed at the second side 212 and between the third antenna element ANT-3 and the hinge 220.

Specifically, referring to fig. 12, the fourth antenna element ANT-4 includes a fourth radiator 14 and a fourth feed S4 electrically connected to the fourth radiator 14. The fourth radiator 14 includes a seventh ground terminal 27 and a third open terminal 33 which are oppositely disposed. The seventh ground terminal 27 is closer to the shaft 220 than the third open end 33. Optionally, a sixth adjusting circuit T6 for tuning the frequency band is disposed between the fourth feed S4 and the fourth radiator 14. A first coupling slit 44 is formed between the third open end 33 and said first open end 31. The fourth antenna element ANT-4 and the third antenna element ANT-3 form a common-caliber antenna, so that more resonant modes are generated by a smaller antenna size, more frequency bands are supported, the throughput is improved, and the data transmission rate is increased.

The fifth antenna element ANT-5 is provided at a corner between the top edge 215 and the first side edge 211.

Specifically, referring to fig. 12, the fifth antenna assembly ANT-5 includes a fifth radiator 15 and a fifth feed S5 electrically connected to the fifth radiator 15. The fifth radiator 15 includes a sixth grounded end 26 and a second open end 32, which are oppositely disposed. Sixth ground 26 is disposed at the first side edge 211 and the second open end 32 is disposed at the top edge 215. Optionally, a fifth adjusting circuit T5 for tuning a frequency band is disposed between the fifth feed source S5 and the fifth radiator 15. Optionally, the sixth ground 26 is electrically connected to the second matching circuit M2 with the reference ground.

Referring to fig. 12, the sixth antenna element ANT-6 is disposed at the bottom edge 216.

Specifically, referring to fig. 12, the sixth antenna assembly ANT-6 includes a sixth radiator 16 and a sixth feed S6 electrically connected to the sixth radiator 16. The sixth radiator 16 includes a fifth ground terminal 25 and an eighth ground terminal 28 that are oppositely disposed. Optionally, a seventh adjusting circuit T7 for tuning a frequency band is disposed between the sixth feed source S6 and the sixth radiator 16. Optionally, an eighth regulating circuit T8 is electrically connected between the fifth ground terminal 25 and the reference ground. The sixth radiator 16 between the fifth ground 25 and the seventh regulating circuit T7 has a first broken seam 51.

Optionally, the eighth ground terminal 28 is disposed on the fourth side 214. The sixth feed S6 excites a resonant mode supporting a low frequency, for example, a 1/4 wavelength mode between the first broken slit 51 and the eighth ground 28, and a resonant mode supporting a medium-high frequency is generated by a higher-order mode.

In other embodiments, referring to fig. 13, the eighth ground terminal 28 may be disposed at the bottom side 216 near the fourth side 214. The sixth feed source S6 can excite the first broken seam 51 and the eighth ground terminal 28 to generate a resonant mode supporting medium and high frequencies, for example, a 1/4 wavelength mode, and the sixth feed source S6 can also excite the first broken seam 51 and the fifth ground terminal 25 to generate a resonant mode supporting medium and high frequencies, for example, a 1/4 wavelength mode, and the two resonant modes are overlapped, so that the radiation performance of the sixth antenna assembly ANT-6 for medium and high frequencies can be improved.

By shortening the length of the sixth radiator 16, the sixth antenna assembly ANT-6 can support more MHB bands.

Referring to fig. 12, the second control module 520 is electrically connected to the first antenna element ANT-1, the fifth antenna element ANT-5, the fourth antenna element ANT-4 and the sixth antenna element ANT-6. The second control module 520 is configured to determine a second target antenna among the first antenna element ANT-1, the fifth antenna element ANT-5, the fourth antenna element ANT-4, and the sixth antenna element ANT-6 according to the signal strength of the first antenna element ANT-1, the fifth antenna element ANT-5, the fourth antenna element ANT-4, and the sixth antenna element ANT-6, and switch to the second target antenna to transmit a second frequency band. In this embodiment, the second frequency band is an MHB frequency band.

The second control module 520 determines a second target antenna among the first antenna element ANT-1, the fifth antenna element ANT-5, the fourth antenna element ANT-4, and the sixth antenna element ANT-6, and switches to the second target antenna to transmit a second frequency band, which may refer to the operating mode of the first control module 510 and is not described herein again.

Optionally, the first antenna element ANT-1, the fifth antenna element ANT-5, the fourth antenna element ANT-4, and the sixth antenna element ANT-6 may receive a second frequency band simultaneously.

When the foldable electronic device 1000 is in a horizontal screen holding state in an unfolded state, the fifth antenna assembly ANT-5 and the sixth antenna assembly ANT-6 may be blocked, and the detection unit in the second control module 520 may detect that the signal strength of the fifth antenna assembly ANT-5 and the sixth antenna assembly ANT-6 is relatively poor, and the signal strength of the first antenna assembly ANT-1 and the fourth antenna assembly ANT-4 is relatively good, at this time, one or both of the first antenna assembly ANT-1 and the fourth antenna assembly ANT-4 in the second control module 520 may be a second target antenna, and may switch to the second target antenna to transmit an MHB signal, so as to ensure that the foldable electronic device 1000 has good transceiving performance on the MHB signal in the horizontal screen holding state.

When the foldable electronic device 1000 is in the vertical screen holding state in the unfolded state, the first antenna assembly ANT-1 and the fourth antenna assembly ANT-4 may be blocked, the detection unit in the second control module 520 may detect that the signal strength of the first antenna assembly ANT-1 and the fourth antenna assembly ANT-4 is relatively poor, and the signal strength of the fifth antenna assembly ANT-5 and the sixth antenna assembly ANT-6 is relatively good, at this time, the switching unit in the second control module 520 may determine that the fifth antenna assembly ANT-5 and the sixth antenna assembly ANT-6 are the second target antenna, and switch to the second target antenna to transmit an MHB signal, so as to ensure that the foldable electronic device 1000 has good transceiving performance on the MHB signal in the horizontal screen holding state.

When the foldable electronic device 1000 is in the folded state, since the first antenna element ANT-1 and the fourth antenna element ANT-4 can both improve the radiation performance of the first antenna element ANT-1 and the fourth antenna element ANT-4 in the folded state through the coupling effect of the coupling branches, that is, the signal strength of the first antenna element ANT-1 and the fourth antenna element ANT-4 in the folded state is better, the switching unit in the second control module 520 may determine that one or both of the first antenna element ANT-1 and the fourth antenna element ANT-4 is/are the second target antenna, and switch to the second target antenna to transmit the MHB signal, so as to ensure that the foldable electronic device 1000 has better transceiving performance for the MHB signal in the horizontal screen holding state.

The if antenna set provided by this embodiment includes the first antenna element ANT-1, the fifth antenna element ANT-5, the fourth antenna element ANT-4 and the sixth antenna element ANT-6, and the first antenna element ANT-1, the fifth antenna element ANT-5, the fourth antenna element ANT-4 and the sixth antenna element ANT-6 are respectively disposed on different sides of the foldable electronic device 1000, such as a left side, a right side, a top side and a bottom side. On one hand, radiators of the first antenna element ANT-1, the fifth antenna element ANT-5, the fourth antenna element ANT-4 and the sixth antenna element ANT-6 do not overlap when the antenna is folded, so that the isolation among the first antenna element ANT-1, the fifth antenna element ANT-5, the fourth antenna element ANT-4 and the sixth antenna element ANT-6 is increased, and mutual interference is avoided; on the other hand, the first antenna assembly ANT-1, the fifth antenna assembly ANT-5, the fourth antenna assembly ANT-4 and the sixth antenna assembly ANT-6 are arranged at positions which can cover different use scenes, such as vertical screen holding, horizontal screen holding or folding state, wherein good-signal antennas exist, so that the antennas with good signals are switched to work; on the other hand, the first antenna element ANT-1, the fourth antenna element ANT-4 and the fifth antenna element ANT-5 are all located on the first frame 210 (i.e., the upper half) of the foldable electronic device 1000, so that the antenna of the second frame 230 (i.e., the lower half) of the foldable electronic device 1000 is a passive part of the antenna of the first frame 210 (i.e., the upper half), which is beneficial to the layout and performance of the antenna, and in addition, the antenna of the first frame 210 (i.e., the upper half) of the foldable electronic device 1000 has better performance when combined to a specific scene, so the antenna layout of the present embodiment has better performance for the MHB band.

Referring to fig. 14, the second control module 520 includes a first main control module 521, a first control switch 522, a second main control module 523 and a second control switch 524. The first control switch 522 is electrically connected to the first main control module 521, the fifth antenna element ANT-5 and the fourth antenna element ANT-4. The first control switch 522 is configured to switch the fifth antenna assembly ANT-5 or the fourth antenna assembly ANT-4 to be electrically connected to the first main control module 521. The second control switch 524 is electrically connected to the second main control module 523, the first antenna element ANT-1, and the sixth antenna element ANT-6. The second control switch 524 is configured to switch the first antenna assembly ANT-1 or the sixth antenna assembly ANT-6 to be electrically connected to the first main control module 521. It is understood that the first master module 521 and the second master module 523 may be Power Sources (PAs).

When the first antenna element ANT-1, the fifth antenna element ANT-5, the fourth antenna element ANT-4 and the sixth antenna element ANT-6 support a 5G NR (NR is fully called New Radio, chinese is New air interface) MHB (for example, N41 frequency band), the first main control module 521 switches the transmitting antenna between the fifth antenna element ANT-5 and the fourth antenna element ANT-4 through the first control switch 522, and the second main control module 523 switches the transmitting antenna between the first antenna element ANT-1 and the sixth antenna element ANT-6 through the second control switch 524, so as to implement two-way control (dual PA) intelligent free switching. The fifth antenna assembly ANT-5 and the fourth antenna assembly ANT-4 are main antennas.

When the first antenna element ANT-1, the fifth antenna element ANT-5, the fourth antenna element ANT-4, and the sixth antenna element ANT-6 support the MHB of LTE (Long Term Evolution, chinese for the whole english Term of LTE), the first main control module 521 switches the transmitting antenna between the fifth antenna element ANT-5 and the fourth antenna element ANT-4 through the first control switch 522. The fifth antenna assembly ANT-5 and the fourth antenna assembly ANT-4 are main antennas.

The first antenna element ANT-1, the fifth antenna element ANT-5, the fourth antenna element ANT-4 and the sixth antenna element ANT-6 can receive signals, so that 4-path receiving (4 RX) of an MHB frequency band is realized, and the throughput and the data transmission rate are improved.

Furthermore, the first antenna element ANT-1, the fifth antenna element ANT-5, the fourth antenna element ANT-4 and the sixth antenna element ANT-6 may also operate at 4 × 4mimo (multiple input multiple output).

The detection and switching process of the second control module 520 is a real-time dynamic process. That is, the detection unit in the second control module 520 detects the signal reception strength of the first antenna assembly ANT-1, the fifth antenna assembly ANT-5, the fourth antenna assembly ANT-4, and the sixth antenna assembly ANT-6 in real time, and the second control module 520 may dynamically adjust the switch unit in real time according to the usage scenario to implement intelligent switching, so as to ensure that the antenna with the optimal or better signal strength is used as the transmitting antenna and the other antennas are used as the receiving antennas in order to keep the transmitting antenna with better signal quality in different hand-holding postures no matter how the working environment of the foldable electronic device 1000 changes (or how the hand-holding posture changes), thereby improving the signal stability of the foldable electronic device 1000 and ensuring that the user has the best signal in real time.

It will be appreciated that the antenna system 100 also includes electrical connection means. At least a portion of the electrical connection device extends through the shaft 220. The electrical connection device is electrically connected between the first antenna element ANT-1 and the second antenna element ANT-2, and between the first antenna element ANT-1 and the sixth antenna element ANT-6.

Optionally, the electrical connection device is a flexible circuit board, and the flexible circuit board has flexibility so as to be suitable for the folding action of the foldable electronic device 1000.

The electrical connection device includes a first electrical connection trace and a second electrical connection trace. The first electrically connecting trace is electrically connected between the first antenna element ANT-1 and the second antenna element ANT-2 (specifically, between the first switch unit 511 and the second antenna element ANT-2), and the second electrically connecting trace is electrically connected between the first antenna element ANT-1 and the sixth antenna element ANT-6 (specifically, between the second control switch 524 and the sixth antenna element ANT-6).

Since the first antenna assembly ANT-1 and the sixth antenna assembly ANT-6 are respectively located on the first frame 210 and the second frame 230, and the first antenna assembly ANT-1 and the second antenna assembly ANT-2 are respectively located on the first frame 210 and the second frame 230, a conventional cable connection line may cause problems such as confusion and interference with other devices or short circuit in the folding process of the foldable electronic device 1000.

Referring to fig. 15, the antenna system 100 further includes a first high frequency antenna group and a third control module 530.

Referring to fig. 15, the first high-frequency antenna group includes the fourth antenna element ANT-4, the seventh antenna element ANT-7, the eighth antenna element ANT-8 and the ninth antenna element ANT-9. It is understood that the fourth antenna element ANT-4, the seventh antenna element ANT-7, the eighth antenna element ANT-8 and the ninth antenna element ANT-9 described herein all include an antenna radiator, an antenna feed source, and the like. The fourth antenna element ANT-4, the seventh antenna element ANT-7, the eighth antenna element ANT-8 and the ninth antenna element ANT-9 are all capable of transceiving NR UHB (ultra high frequency) signals. The NR UHB (ultra high frequency) signal includes, but is not limited to, N77, N78 frequency bands.

The seventh antenna element ANT-7 is disposed on the first side 211 and located between the first antenna element ANT-1 and the fifth antenna element ANT-5.

Specifically, referring to fig. 15, the seventh antenna element ANT-7 further includes a seventh radiator 17 and a seventh feed S7 electrically connected to the seventh radiator 17. The seventh radiator 17 includes the sixth ground 26, the ninth ground 29, and a second break 52 located between the sixth ground 26 and the ninth ground 29. The ninth ground terminal 29 is located at the first side 211 and is close to the rotation shaft 220 relative to the sixth ground terminal 26. Optionally, the seventh feed source S7 is electrically connected between the second broken seam 52 and the ninth ground terminal 29; alternatively, the seventh feed S7 is electrically connected between the second broken slit 52 and the sixth ground 26.

The eighth antenna element ANT-8 is provided at the top edge 215.

Specifically, referring to fig. 15, the eighth antenna assembly ANT-8 further includes an eighth radiator 18 and an eighth feed S8 electrically connected to the eighth radiator 18. The eighth radiator 18 includes a tenth ground terminal 60 and a fourth open terminal 34. The eighth feed S8 is electrically connected between the tenth ground 60 and the fourth opening end 34. The fourth open end 34 is proximate the second side 212 relative to the tenth grounded end 60.

The ninth antenna element ANT-9 is disposed on the top side 215.

Specifically, the ninth antenna element ANT-9 further includes a ninth radiator 19 and a ninth feed S9 electrically connected to the ninth radiator 19. The ninth radiator 19 includes an eleventh ground terminal 61 and a fifth open end 35. The ninth feed S9 is electrically connected between the eleventh ground 61 and the fifth open end 35. A ninth adjusting circuit T9 is arranged between the ninth feed source S9 and the ninth radiator 19. The fifth open end 35 is proximate the first side 211 relative to the eleventh ground 61. The eleventh ground terminal 61 is disposed adjacent to the tenth ground terminal 60, and the eleventh ground terminal 61 is close to the first side 211 relative to the tenth ground terminal 60. The fifth open end 35 is coupled to the second open end 32 by a gap. The ninth antenna element ANT-9, the fifth antenna element ANT-5 and the seventh antenna element ANT-7 form a common-caliber antenna, so that more resonance modes are generated by a smaller antenna size, more frequency bands are supported, the throughput is improved, and the data transmission rate is increased.

The fourth antenna element ANT-4, the seventh antenna element ANT-7, the eighth antenna element ANT-8, and the ninth antenna element ANT-9 are all configured to generate a resonance supporting a third frequency band.

The third control module 530 is electrically connected to the fourth antenna element ANT-4, the seventh antenna element ANT-7, the eighth antenna element ANT-8 and the ninth antenna element ANT-9, and the third control module 530 is configured to determine a third target antenna among the fourth antenna element ANT-4, the seventh antenna element ANT-7, the eighth antenna element ANT-8 and the ninth antenna element ANT-9 according to signal strengths of the fourth antenna element ANT-4, the seventh antenna element ANT-7, the eighth antenna element ANT-8 and the ninth antenna element ANT-9, and switch to the third target antenna to transmit a third frequency band. The third frequency band includes, but is not limited to, at least one of the N77, N78 frequency bands.

Optionally, the fourth antenna element ANT-4, the seventh antenna element ANT-7, the eighth antenna element ANT-8, and the ninth antenna element ANT-9 may receive a third frequency band simultaneously.

When the foldable electronic device 1000 is in a landscape holding state in an unfolded state, the eighth antenna element ANT-8 and the ninth antenna element ANT-9 may be blocked, the detection unit in the third control module 530 may detect that the signal strength of the eighth antenna element ANT-8 and the ninth antenna element ANT-9 is relatively poor, and the signal strength of the fourth antenna element ANT-4 and the seventh antenna element ANT-7 is relatively good, at this time, the switching unit in the third control module 530 may determine that one or both of the fourth antenna element ANT-4 and the seventh antenna element ANT-7 is a third target antenna, and switch to at least one of N77 and N78 frequency bands of the third target antenna, so as to ensure that the foldable electronic device 1000 has better transceiving performance on at least one of the N77 and N78 frequency bands in the landscape holding state.

When the foldable electronic device 1000 is in the vertical screen holding state in the unfolded state, the fourth antenna element ANT-4 may be blocked, the detection unit in the third control module 530 may detect that the signal strength of the fourth antenna element ANT-4 is relatively poor, and the signal strength of the seventh antenna element ANT-7, the eighth antenna element ANT-8, and the ninth antenna element ANT-9 is relatively good, at this time, the switching unit in the third control module 530 may determine that at least one of the seventh antenna element ANT-7, the eighth antenna element ANT-8, and the ninth antenna element ANT-9 is a third target antenna, and switch to at least one of the third target antenna emission N77 and N78 frequency bands, so as to ensure that the foldable electronic device 1000 has good transceiving performance on at least one of the N77 and N78 frequency bands in the horizontal screen holding state.

When the foldable electronic device 1000 is in the folded state, since the fourth antenna elements ANT-4 can all improve the radiation performance of the fourth antenna element ANT-4 in the folded state through the coupling effect of the coupling branches, that is, the signal strength of the fourth antenna element ANT-4 in the folded state is better, the switching unit in the third control module 530 can determine that the fourth antenna element ANT-4 is the third target antenna, and switch to the third target antenna to transmit at least one of the N77 frequency bands and the N78 frequency bands, so as to ensure that the foldable electronic device 1000 has better transceiving performance on at least one of the N77 frequency band and the N78 frequency band in the horizontal screen holding state.

It should be noted that, the above is only to illustrate the beneficial effect of the antenna component layout in the present application under different scenarios, and it is not limited that the antenna component under the above scenarios is necessarily operated in the manner described above.

The first high-frequency antenna group provided in this embodiment includes a fourth antenna element ANT-4, the seventh antenna element ANT-7, the eighth antenna element ANT-8, and the ninth antenna element ANT-9, and the fourth antenna element ANT-4, the seventh antenna element ANT-7, the eighth antenna element ANT-8, and the ninth antenna element ANT-9 are respectively disposed on the top side, the left side, and the right side of the foldable electronic device 1000. On one hand, the fourth antenna assembly ANT-4, the seventh antenna assembly ANT-7, the eighth antenna assembly ANT-8 and the ninth antenna assembly ANT-9 are arranged at positions which can cover different use scenes, for example, antennas with good signals exist in vertical screen holding, horizontal screen holding or folding states, and therefore the operation of the antennas with good signals is switched; on the other hand, the fourth antenna element ANT-4, the seventh antenna element ANT-7, the eighth antenna element ANT-8 and the ninth antenna element ANT-9 are all located at the first frame 210 (i.e., the upper half) of the foldable electronic device 1000, so that the antenna of the first frame 210 (i.e., the upper half) of the foldable electronic device 1000 has better performance when combined into a specific scene, and thus the antenna layout of the present embodiment has better performance for the UHB band.

Referring to fig. 16, the third control module 530 includes a third main control module 531, a third control switch 532, a fourth main control module 533 and a fourth control switch 534. The third control switch 532 is electrically connected to the third main control module 531, the seventh antenna element ANT-7 and the ninth antenna element ANT-9. The third control switch 532 is used for switching the seventh antenna element ANT-7 or the ninth antenna element ANT-9 to be electrically connected to the third main control module 531. The fourth control switch 534 is electrically connected to the fourth main control module 533, the fourth antenna element ANT-4 and the eighth antenna element ANT-8. The fourth control switch 534 is configured to switch the fourth antenna element ANT-4 or the eighth antenna element ANT-8 to be electrically connected to the fourth main control module 533.

When the fourth antenna element ANT-4, the seventh antenna element ANT-7, the eighth antenna element ANT-8 and the ninth antenna element ANT-9 support an N78 frequency band, the third main control module 531 switches the transmitting antenna between the seventh antenna element ANT-7 and the ninth antenna element ANT-9 through the third control switch 532, and the fourth main control module 533 switches the transmitting antenna between the fourth antenna element ANT-4 and the eighth antenna element ANT-8 through the fourth control switch 534, so that two-way control (dual PA) intelligent free switching is realized.

Generally, when one power source (PA) is switched among the fourth antenna element ANT-4, the seventh antenna element ANT-7, the eighth antenna element ANT-8, and the ninth antenna element ANT-9, in order to ensure signal equalization of four antennas, the power source (PA) is generally disposed near the center positions of the fourth antenna element ANT-4, the seventh antenna element ANT-7, the eighth antenna element ANT-8, and the ninth antenna element ANT-9, but this results in poor signal quality of each antenna, and if the power source (PA) is disposed close to the group of the fourth antenna element ANT-4 and the eighth antenna element ANT-8 and away from the group of the seventh antenna element ANT-7 and the ninth antenna element ANT-9, the signal quality of the group of the seventh antenna element ANT-7 and the ninth antenna element ANT-9 is poor. In this embodiment, two sets of master control modules (i.e., two PAs) are introduced, and the two PAs may respectively approach the set of the fourth antenna element ANT-4 and the eighth antenna element ANT-8, and the set of the seventh antenna element ANT-7 and the ninth antenna element ANT-9, so that the signals of the fourth antenna element ANT-4, the seventh antenna element ANT-7, the eighth antenna element ANT-8 and the ninth antenna element ANT-9 are all better; by introducing two sets of master modules (i.e., two PAs), the upstream rate is faster when both PAs are operating.

The antenna system 100 further comprises a second set of high frequency antennas.

Referring to fig. 17, the second high frequency antenna set includes the fourth antenna element ANT-4, the seventh antenna element ANT-7, the ninth antenna element ANT-9 and a tenth antenna element ANT-10. It can be understood that the tenth antenna assembly ANT-10 described herein includes an antenna radiator, an antenna feed, and the like. The fourth antenna element ANT-4, the seventh antenna element ANT-7, the ninth antenna element ANT-9, and the tenth antenna element ANT-10 are all configured to generate a resonance supporting a fourth frequency band, which is an NR UHB (ultra high frequency) signal. The NR UHB (ultra high frequency) signal includes, but is not limited to, the N79 band.

The tenth antenna assembly ANT-10 is located in the area surrounded by the first frame 210, and the tenth antenna assembly ANT-10 is an LDS antenna. The LDS antenna refers to a radiator formed by a Laser Direct Structuring (LDS) process. The LDS antenna does not occupy space on the bezel and can be flexibly disposed within the first bezel 210. Alternatively, the tenth antenna element ANT-10 may have a separate feed, or may be co-fed with other antennas. The location of the tenth antenna element ANT-10 is not specifically limited in this application. In fig. 17, the tenth antenna element ANT-10 is located near the top edge 215.

Alternatively, the position of the radiator of the tenth antenna assembly ANT-10 may be appropriately adjusted according to the size of the display screen disposed on the front and back sides of the first frame 210, for example, the position of the radiator of the tenth antenna assembly ANT-10 and the position of the display screen are staggered in the Z-axis direction or at least partially staggered.

The tenth antenna assembly ANT-10 is electrically connected to the fourth control switch 534; the fourth control switch 534 is further configured to switch the fourth antenna assembly ANT-4 or the tenth antenna assembly ANT-10 to be electrically connected to the fourth master module 533;

referring to fig. 17, the third control module 530 is further electrically connected to the tenth antenna element ANT-10. The third control module 530 is further configured to determine a fourth target antenna among the fourth antenna element ANT-4, the seventh antenna element ANT-7, the ninth antenna element ANT-9 and the tenth antenna element ANT-10 according to the signal strength of the fourth antenna element ANT-4, the seventh antenna element ANT-7, the ninth antenna element ANT-9 and the tenth antenna element ANT-10, and switch to the fourth target antenna to transmit a fourth frequency band. The fourth frequency band number includes, but is not limited to, the N79 frequency band.

Optionally, the fourth antenna element ANT-4, the seventh antenna element ANT-7, the eighth antenna element ANT-8, and the tenth antenna element ANT-10 may simultaneously receive a fourth frequency band.

The third main control module 531 switches the transmitting antenna between the seventh antenna element ANT-7 and the ninth antenna element ANT-9 through a third control switch 532, and the fourth main control module 533 switches the transmitting antenna between the fourth antenna element ANT-4 and the tenth antenna element ANT-10 through a fourth control switch 534, so as to implement two-way control (dual PA) intelligent free switching.

When the foldable electronic device 1000 is in a cross-screen holding state in an unfolded state, the eighth antenna assembly ANT-8 may be blocked, the detection unit in the third control module 530 may detect that the signal strength of the eighth antenna assembly ANT-8 is relatively poor, and the signal strength of the fourth antenna assembly ANT-4, the seventh antenna assembly ANT-7, and the tenth antenna assembly ANT-10 is relatively good, at this time, the switching unit in the third control module 530 may determine that at least one of the fourth antenna assembly ANT-4, the seventh antenna assembly ANT-7, and the tenth antenna assembly ANT-10 is a fourth target antenna, and switch to a fourth target antenna to emit an N79 frequency band, so as to ensure that the foldable electronic device 1000 has good transceiving performance on the N79 frequency band in the cross-screen holding state.

When the foldable electronic device 1000 is in the vertical screen holding state in the unfolded state, the fourth antenna element ANT-4 may be blocked, and the detection unit in the third control module 530 may detect that the signal strength of the fourth antenna element ANT-4 is relatively poor, and the signal strengths of the seventh antenna element ANT-7, the eighth antenna element ANT-8 and the tenth antenna element ANT-10 are relatively good, at this time, the switching unit in the third control module 530 may determine that at least one of the seventh antenna element ANT-7, the eighth antenna element ANT-8 and the tenth antenna element ANT-10 is a fourth target antenna, and switch to the fourth target antenna to transmit an N79 frequency band, so as to ensure that the foldable electronic device 1000 has good transceiving performance on the N79 frequency band in the horizontal screen holding state.

When the foldable electronic device 1000 is in the folded state, because the fourth antenna elements ANT-4 can all improve the radiation performance of the fourth antenna elements ANT-4 in the folded state through the coupling effect of the coupling branches, that is, the signal strength of the fourth antenna elements ANT-4 in the folded state is better, the switching unit in the third control module 530 can determine that at least one of the fourth antenna elements ANT-4 is the fourth target antenna and switch to the fourth target antenna to transmit the N79 frequency band, so as to ensure that the foldable electronic device 1000 has better transceiving performance for the N79 frequency band in the horizontal screen holding state.

The antenna system 100 also includes a set of Wi-Fi antennas. The Wi-Fi antenna group is used for supporting Wi-Fi 2.4G and Wi-Fi 5G frequency bands.

Referring to fig. 18, the Wi-Fi antenna group includes the first antenna element ANT-1, the eighth antenna element ANT-8, an eleventh antenna element ANT-11, and a twelfth antenna element ANT-12. The eleventh antenna element ANT-11 is provided at a corner between the second side edge 212 and the top edge 215. The first antenna assembly ANT-1 and the eleventh antenna assembly ANT-11 can work simultaneously to support Wi-Fi 2.4G, and the eighth antenna assembly ANT-8 and the twelfth antenna assembly ANT-12 support Wi-Fi 5G frequency band.

Referring to fig. 18, the eleventh antenna assembly ANT-11 includes an eleventh feed S11 and an eleventh radiator 111 electrically connected to the eleventh feed S11, where the eleventh radiator 111 includes a sixth open end 36 and a twelfth ground end 62. The sixth open end 36 is slot-coupled to the fourth open end 34 of the eighth antenna element ANT-8, and the twelfth ground 62 is disposed on the second side 212. The eleventh feed S11 is electrically connected between the sixth open end 36 and the twelfth ground 62, and a tenth adjusting circuit T10 is disposed between the eleventh feed S11 and the eleventh radiator 111. A third matching circuit M3 is provided between the twelfth ground terminal 62 and the reference ground.

The eleventh antenna component ANT-11 and the eighth antenna component ANT-8 form a common caliber antenna.

The twelfth antenna component ANT-12 is disposed in an area surrounded by the first bezel 210. And the twelfth antenna component ANT-12 is an LDS antenna. Alternatively, the twelfth antenna component ANT-12 may have a separate feed, or may be co-fed with another antenna. The location of the twelfth antenna element ANT-12 is not specifically limited in this application. In fig. 18, the twelfth antenna element ANT-12 is located adjacent to the second side 212 and the rotation axis 220.

Alternatively, the position of the radiator of the twelfth antenna element ANT-12 may be appropriately adjusted according to the size of the display screen disposed on the front and back sides of the first frame 210, for example, the position of the radiator of the twelfth antenna element ANT-12 and the position of the display screen are staggered in the Z-axis direction or at least partially staggered.

Referring to fig. 19, the antenna system 100 further includes a GPS antenna set. The GPS antenna group comprises the eighth antenna component ANT-8 and the eleventh antenna component ANT-11. The eighth antenna assembly ANT-8 supports a GPS-L5 frequency band, and the tenth antenna assembly ANT-10 supports a GPS-L1 frequency band. By arranging the GPS antenna group at the corner of the foldable electronic device 1000 near the top edge 215, the antenna is not shielded when the vertical screen uses a GPS, and the GPS antenna group has better performance.

Referring to fig. 20, the antenna system 100 further includes a bluetooth antenna group and a fifth control module 550. The Bluetooth antenna group comprises the first antenna assembly ANT-1 and the eleventh antenna assembly ANT-11. The fifth control module 550 is configured to electrically connect the first antenna element ANT-1 and the eleventh antenna element ANT-11. The fifth control module 550 is configured to control at least one of the first antenna element ANT-1 and the eleventh antenna element ANT-11 to transmit a bluetooth signal according to the signal strength of the first antenna element ANT-1 and the eleventh antenna element ANT-11. The fifth control module 550 selects an antenna with a stronger signal strength from the first antenna element ANT-1 and the eleventh antenna element ANT-11 to transmit a bluetooth signal.

Generally, set up a bluetooth antenna on electronic equipment, when the foldable electronic equipment 1000 that this application provided is folding, collapsible electronic equipment 1000's volume reduces, is held the shelter easily, through set up two bluetooth antennas in the diagonal position of first frame 210 in this embodiment, and two bluetooth antennas can carry out real-time dynamic switch according to signal strength to all there is bluetooth antenna workable under the realization different attitudes that hold, folding or the state of expanding.

The first antenna assembly ANT-1 and the eleventh antenna assembly ANT-11 can support both the Bluetooth frequency band and the Wi-Fi 2.4G frequency band.

Alternatively, an embodiment of the frequency bands supported by the first to twelfth antenna elements ANT-1 to ANT-12 is as follows, and the present application is not limited to the following embodiment.

The first antenna element ANT-1 may support the following frequency bands: LB PRX (primary reception), MHB PRX MIMO (multiple input multiple output), N41 PRX (primary reception), WIFI 2.4g CHAIN 1, bt (bluetooth);

the second antenna assembly ANT-2 may support the following frequency bands: LB DRX (diversity reception);

the third antenna element ANT-3 may support the following frequency bands: b20;

the fourth antenna element ANT-4 may support the following frequency bands: MHB DRX (diversity reception) (CA), N41 PRX MIMO, N78 DRX MIMO, N79 PRX MIMO;

the fifth antenna element ANT-5 may support the following frequency bands: MHB PRX (primary set reception) (CA), N41 DRX (diversity reception);

the sixth antenna element ANT-6 may support the following frequency bands: MHB DRX MIMO (CA), N41 DRX MIMO;

the seventh antenna element ANT-7 may support the following frequency bands: n78 PRX (primary set receive), N79 PRX (primary set receive);

the eighth antenna element ANT-8 may support the following frequency bands: n78 PRX MIMO, WIFI 5G CHAIN 1, GPS-L5;

the ninth antenna element ANT-9 may support the following frequency bands: N78/N79 DRX (diversity reception);

the tenth antenna assembly ANT-10 may support the following frequency bands: n79 DRX MIMO;

the eleventh antenna component ANT-11 may support the following frequency bands: WIFI 2.4G CHAIN 0, BT (Bluetooth), GPS-L1;

the twelfth antenna element ANT-12 may support the following frequency bands: WIFI 5G CHAIN 0;

the antenna layout and the switching mode can realize intelligent switching of the 2/3/4/5G cellular mobile antenna. The 2/3/4G LB TX (low-frequency transmitting antenna) is intelligently switched between the first antenna assembly ANT-1 and the second antenna assembly ANT-2, and the diagonal layout can ensure that the antenna cannot be seized when a user uses a handheld game or a horizontal screen game, so that the problem of no signal is avoided. The 2/3/4G MHB TX (intermediate frequency transmitting antenna) is intelligently switched between the fourth antenna assembly ANT-4 and the fifth antenna assembly ANT-5, and the diagonal layout can ensure that the antenna cannot be seized when a user uses a handheld game or a horizontal screen game, so that the problem of no signal is avoided. In addition, the fourth antenna element ANT-4 is disposed on the second side 212, the specific absorption rate of the electromagnetic wave of the head is low, and the OTA performance is excellent.

Referring to fig. 21, the foldable electronic device 1000 further includes an NFC antenna ANT-13. The NFC antenna ANT-13 is located in an area surrounded by the first frame 210. The radiator of the NFC antenna ANT-13 is connected in series with at least the radiator of the antenna system 100 to form a coplanar radiator.

Optionally, the radiator of the NFC antenna ANT-13 may be connected in series with the one-segment radiator on the first frame 210, or connected in series with the multi-segment radiator. A radiator of the NFC antenna ANT-13 is connected in series with at least one radiator of the first antenna element ANT-1, the second antenna element ANT-2, the third antenna element ANT-3, the fourth antenna element ANT-4, the fifth antenna element ANT-5, the sixth antenna element ANT-6, the seventh antenna element ANT-7, the eighth antenna element ANT-8, the ninth antenna element ANT-9, the tenth antenna element ANT-10, the eleventh antenna element ANT-11, and the twelfth antenna element ANT-12. When the radiators of the NFC antenna ANT-13 are connected in series with the multi-segment radiator, an inductance element is disposed between two adjacent radiators, and the inductance element is in a conducting state for an NFC signal when the NFC antenna ANT-13 operates, and is in a disconnecting state for an electromagnetic signal when the radiator of the first frame 210 receives and transmits the electromagnetic signal (for example, an LB signal, an MHB signal, or an UHB signal).

In addition, a capacitive element is disposed between the ground terminal of the radiator on the first frame 210 and the reference ground, and the capacitive element can make the radiator on the first frame 210 be in a floating state with respect to the reference ground when the NFC antenna ANT-13 operates, so as to prevent the current of the radiator on the first frame 210 from being transmitted to the reference ground through the ground terminal and failing to be connected in series with the radiator of the NFC antenna ANT-13, which affects the performance of the radiator on the first frame 210 for receiving and transmitting NFC signals. The capacitive element can conduct the ground terminal of the radiator on the first frame 210 with the reference ground when the radiator on the first frame 210 is used for transceiving the high-frequency electromagnetic wave signal, so as to ensure the performance of the radiator on the first frame 210 for transceiving the target antenna signal.

The radiation section of the first frame 210, which forms a common radiator with the radiator of the NFC antenna ANT-13, is not specifically limited in this application, and may be any one or more of the first antenna element ANT-1 to the twelfth antenna element ANT-12. The radiator of the NFC antenna ANT-13 may be specifically designed according to a specific device stack on a circuit board.

By arranging the radiator of the NFC antenna ANT-13 to be connected in series with at least the radiator of the antenna system 100, the area of the NFC signal detected by the NFC antenna ANT-13 is increased, and thus the performance of the NFC antenna ANT-13 is improved.

Referring to fig. 22, at least one radiator on the first frame 210 and the second frame 230 may be used to sense that a subject (e.g., a human body) to be tested approaches the foldable electronic device 1000. In this embodiment, the fifth antenna assembly ANT-5 is used for sensing that a subject (e.g., a human body) to be tested approaches the foldable electronic device 1000.

The antenna system 100 further includes at least one isolation capacitor C1, at least one proximity sensor 70, and at least one isolation inductor L1. The isolation capacitor C1 is electrically connected between at least the fifth radiator 15 and the reference ground. The isolation inductor L1 is electrically connected between the fifth radiator 15 and the proximity sensor 70. The proximity sensor 70 is used to detect whether the body to be detected is close to the foldable electronic device 1000 through the fifth radiator 15.

When no capacitor is disposed at a position where the adjusting circuit (or the matching circuit) between the fifth feed source S5 and the fifth radiator 15 is connected to the fifth radiator 15, an isolation capacitor C1 is further disposed at a position where the fifth feed source S5 is electrically connected to the fifth radiator 15. When the position of the adjusting circuit (or matching circuit) between the fifth feed S5 and the fifth radiator 15 in the antenna system 100, which is connected to the fifth radiator 15, is a capacitor, the capacitor can be used as the isolation capacitor C1, and the isolation capacitor C1 does not need to be additionally arranged. Through the arrangement of the fifth radiator 15, the fifth radiator 15 is grounded and fed through the isolation capacitor C1, so that the fifth radiator 15 is in a floating state relative to the reference ground and the fifth feed source S5, and the fifth radiator 15 can transmit an induction signal when the body to be detected approaches, that is, the fifth radiator 15 can be used for capacitance change detection.

The isolation inductor L1 is used to enable an inductive signal to be transmitted between the fifth radiator 15 and the proximity inductive sensor 70, and a radio frequency signal cannot be transmitted.

Through the suspension design, the fifth radiator 15 can be used for capacitance change detection, effectively sensing the surrounding capacitance change, judging whether the foldable electronic device 1000 is close to the human body, and further triggering the proximity sensor 70 to realize the adaptive adjustment of the radio frequency power so as to meet the SAR (specific absorption rate) compliance.

The fifth radiator 15 can be used as both a carrier for receiving and transmitting electromagnetic waves and an induction electrode for inducing the approach of the electric field of the human body, so that a dual function is realized, the function of the fifth radiator 15 is increased under the condition that the number of radiators is not increased, and the foldable electronic device 1000 with multiple functions, high integration level and small volume is favorably realized.

The present application does not specifically limit the position and number of radiators serving as sensing electrodes for sensing the approach of the electric field of the human body, and optionally, the radiators of the eleventh antenna assembly ANT-11 and the radiators of the fifth antenna assembly ANT-5 may be used as the sensing electrodes. On the one hand, both sides of the eleventh radiator 111 are broken seams, and both sides of the fifth antenna element ANT-5 are broken seams, so that the eleventh radiator 111 is easily used as a floating radiator and the fourth radiator 14 is easily used as a floating radiator; on the other hand, because the radiator of the eleventh antenna assembly ANT-11 is located at the corner between the second side edge 212 and the top edge 215, and the radiator of the eleventh antenna assembly ANT-11 can detect the human body approach at the left side, the top side, the front side (positive Z-axis direction) and the rear side (negative Z-axis direction) of the first bezel 210, because the radiator of the fifth antenna assembly ANT-5 is located at the corner between the first side edge 211 and the top edge 215, and the radiator of the fifth antenna assembly ANT-5 can detect the human body approach at the right side, the top side, the front side (negative Z-axis direction) and the rear side (negative Z-axis direction) of the first bezel 210, it is possible to perform human body approach detection for multiple sides of the foldable electronic device 1000.

According to the antenna assembly, the antenna assembly is arranged in a 360-degree surrounding mode, the performance of the whole machine and various user use scenes are fully considered, the fact that in various real use scenes, two-path intelligent switching of 2/3/4G mobile cellular signals can be achieved, the 5G mobile cellular signals are freely and intelligently switched through double power sources (PA) and 4 antennas is guaranteed, the 2/3/4G antennas and the 5G antennas are not held, the performance of the antennas is guaranteed, the antennas have good performance in the face of various complex user scenes, the use requirements of users are met, and user experience is improved; antenna slots on the left side and the right side of the foldable electronic device 1000 may be symmetric about the rotating shaft 220, and in the closed-lid condition, the slot positions coincide to avoid shielding the first coupling slot 44 of the radiator on the first frame 210, and the second frame 230 has no antenna position, and is used as a part of the antenna in the corresponding position on the first frame 210 in the closed-lid condition, and a structure and a circuit are designed, so that the performance degradation of each antenna of the foldable electronic device 1000 in the closed-lid condition is small and balanced, and the intelligent switching among the antennas can still be supported, thereby ensuring the performance of the closed-lid antenna and improving the user experience; in addition, the antenna radiator in the main direction is designed to be suspended completely, and the omnidirectional SAR detection is realized.

It is understood that the antenna system 100 described herein may be applied to the foldable electronic device 1000, and may also be applied to a straight-plate-shaped electronic device.

Optionally, the foldable electronic device 1000 further comprises a display screen and housing assembly 200. The display screen is disposed on the front side of the housing assembly 200 (the front side refers to a direction toward a user when the user normally uses the display screen), and optionally, a portion of the display screen corresponding to the rotation shaft 220 is a flexible display screen. Optionally, a display screen is not disposed at a position corresponding to the rotation shaft 220, and two display screens are disposed in an area surrounded by the first frame 210 and an area surrounded by the second frame 230, respectively.

The housing assembly 200 also includes a rear cover. When the foldable electronic device 1000 is in the unfolded state, the display screen and the rear cover are respectively located at the front and rear sides of the first frame 210 and the second frame 230, wherein the first frame 210 and the second frame 230 are connected between the display screen and the rear cover and surround the display screen and the rear cover, and the display screen, the first frame 210, the second frame 230 and the rear cover enable the foldable electronic device 1000 to form a relatively closed complete machine. Of course, in other embodiments, the back side of the foldable electronic device 1000 may also be provided with a display screen.

The first frame 210, the second frame 230 and the rear cover may be an integral structure or a separate structure. A plurality of mounting grooves for mounting various electronic devices are formed in the first and

second rims

210 and 230. The display screen, the first frame 210, the second frame 230 and the rear cover are covered to form a receiving space inside the housing assembly 200. The foldable electronic device 1000 further includes a circuit board (including a main board, an auxiliary board, a flexible circuit board, etc.), a battery, a camera module, a microphone, a receiver, a speaker, a face recognition module, a fingerprint recognition module, etc. which are disposed in the accommodating space, and the components can implement the basic functions of the mobile phone, which are not described in detail in this embodiment. It is to be understood that the above description of the foldable electronic device 1000 is merely illustrative of one environment in which the antenna system 100 may be used, and that the specific structure of the foldable electronic device 1000 should not be construed as limiting the antenna system 100 provided herein.

Although embodiments of the present application have been shown and described, it should be understood that they have been presented by way of example only, and not limitation, and that various changes, modifications, substitutions and alterations can be made by those skilled in the art without departing from the scope of the present application, and such improvements and modifications are to be considered as within the scope of the present application.

Claims

1. A foldable electronic device, comprising:

2. The foldable electronic device of claim 1, wherein the first antenna assembly further comprises a controller and a tuning circuit, the tuning circuit being electrically connected to the first coupling stub, the controller being electrically connected to the tuning circuit, the controller being configured to control the tuning circuit to tune an impedance of the first coupling stub when the second bezel and the first bezel are folded over each other.

3. The foldable electronic device of claim 2, wherein the tuning circuit comprises an antenna switch and a plurality of tuning branches electrically connected to the antenna switch; and/or the tuning circuit comprises an adjustable capacitor.

4. The foldable electronic device of claim 1, wherein the first bezel comprises a first side, a top side, and a second side that are connected in series, wherein the second bezel comprises a third side, a bottom side, and a fourth side that are connected in series, wherein the first antenna element is disposed on the first side, and wherein the second antenna element is disposed on the third side;

the foldable electronic device further comprises a third antenna assembly, a fourth antenna assembly and a second coupling branch, wherein the third antenna assembly and the fourth antenna assembly are arranged on the second side edge, the third antenna assembly comprises a third feed source and a third radiating body, and the third feed source is electrically connected with the third radiating body and used for exciting the third radiating body to generate resonance of the first frequency band; the fourth antenna assembly comprises a fourth feed source and a fourth radiator electrically connected with the fourth feed source, and a third coupling gap is formed between the third radiator and the fourth radiator;

the second coupling branch knot is arranged on the fourth side edge and comprises a third coupling section and a fourth coupling section, and a fourth coupling gap is formed between the third coupling section and the fourth coupling section;

when the second frame and the first frame are folded, the third coupling gap overlaps the fourth coupling gap, the third coupling segment is coupled to the third radiator, and the fourth coupling segment is coupled to the fourth radiator.

5. The foldable electronic device of claim 4, further comprising a first control module electrically connected to the first antenna assembly, the second antenna assembly, and the third antenna assembly, the first control module being configured to determine a first target antenna among the first antenna assembly, the second antenna assembly, and the third antenna assembly according to signal strengths of the first antenna assembly, the second antenna assembly, and the third antenna assembly, and switch to the first target antenna to transmit the first frequency band.

6. The foldable electronic device of claim 1, wherein the first band comprises at least one of LB band, MHB band, N41 band, wi-Fi band, bluetooth band.

7. The foldable electronic device of claim 4, further comprising a fifth antenna element, a sixth antenna element and a second control module, wherein the fifth antenna element is disposed at a corner between the top side and the first side, the sixth antenna element is disposed at the bottom side, and the first antenna element, the fourth antenna element, the fifth antenna element and the sixth antenna element are all configured to generate a resonance in a second frequency band;

the second control module is electrically connected to the first antenna assembly, the fourth antenna assembly, the fifth antenna assembly, and the sixth antenna assembly, and the second control module is configured to determine a second target antenna among the first antenna assembly, the fourth antenna assembly, the fifth antenna assembly, and the sixth antenna assembly according to signal strengths of the first antenna assembly, the fourth antenna assembly, the fifth antenna assembly, and the sixth antenna assembly, and switch to the second target antenna to transmit the second frequency band, where the second frequency band includes an MHB frequency band.

8. The foldable electronic device of claim 7, wherein the second control module comprises a first main control module, a first control switch, a second main control module, and a second control switch, the first control switch electrically connects the first main control module, the fourth antenna assembly, and the fifth antenna assembly, the first control switch is used to switch the fourth antenna assembly or the fifth antenna assembly to be electrically connected to the first main control module, the second control switch electrically connects the second main control module, the first antenna assembly, and the sixth antenna assembly, and the second control switch is used to switch the first antenna assembly or the sixth antenna assembly to be electrically connected to the first main control module.

9. The foldable electronic device of claim 7, further comprising a seventh antenna element, an eighth antenna element, a ninth antenna element, and a third control module, wherein the seventh antenna element is disposed on the first side edge and between the first antenna element and the fifth antenna element, the eighth antenna element is disposed on the top edge, the ninth antenna element is disposed on the top edge, and the ninth antenna element, the fifth antenna element, and the seventh antenna element form a common aperture antenna; the fourth antenna element, the seventh antenna element, the eighth antenna element, and the ninth antenna element are all configured to generate a resonance supporting a third frequency band;

the third control module is electrically connected to the fourth antenna assembly, the seventh antenna assembly, the eighth antenna assembly, and the ninth antenna assembly, and the third control module is configured to determine a third target antenna in the fourth antenna assembly, the seventh antenna assembly, the eighth antenna assembly, and the ninth antenna assembly according to signal strengths of the fourth antenna assembly, the seventh antenna assembly, the eighth antenna assembly, and the ninth antenna assembly, and switch to the third target antenna to transmit the third frequency band, where the third frequency band includes at least one of an N77 frequency band and an N78 frequency band.

10. The foldable electronic device of claim 9, wherein the third control module comprises a third main control module, a third control switch, a fourth main control module, and a fourth control switch, the third control switch electrically connects the third main control module, the seventh antenna assembly, and the ninth antenna assembly, the third control switch is used to switch the seventh antenna assembly or the ninth antenna assembly to be electrically connected to the third main control module, the fourth control switch electrically connects the fourth main control module, the fourth antenna assembly, and the eighth antenna assembly, and the fourth control switch is used to switch the fourth antenna assembly or the eighth antenna assembly to be electrically connected to the fourth main control module.

11. The foldable electronic device of claim 10, further comprising a tenth antenna assembly located within an area enclosed by the first bezel, the tenth antenna assembly being an LDS antenna; the fourth antenna element, the seventh antenna element, the ninth antenna element, and the tenth antenna element are all configured to generate a resonance supporting a fourth frequency band;

the tenth antenna assembly is electrically connected to the fourth control switch; the fourth control switch is further configured to switch the fourth antenna assembly or the tenth antenna assembly to be electrically connected to the fourth master control module;

the third control module is further configured to determine a fourth target antenna among the fourth antenna element, the seventh antenna element, the ninth antenna element, and the tenth antenna element according to the signal strengths of the fourth antenna element, the seventh antenna element, the ninth antenna element, and the tenth antenna element, and switch to the fourth target antenna to transmit a fourth frequency band, where the fourth frequency band includes an N79 frequency band.

12. The foldable electronic device of claim 11, further comprising an eleventh antenna element disposed at a corner between the second side edge and the top edge, the eleventh antenna element and the eighth antenna element forming a common aperture antenna element, and a twelfth antenna element disposed within an area enclosed by the first bezel, the twelfth antenna element being an LDS antenna; the first, eighth, eleventh, and twelfth antenna elements are configured to generate a resonance in the Wi-Fi band.

13. The foldable electronic device of claim 12, wherein the eighth antenna assembly and the eleventh antenna assembly are further to generate resonance for a GPS band.

14. The foldable electronic device of claim 12, wherein the first antenna assembly and the eleventh antenna assembly are further configured to generate a bluetooth band resonance, and wherein the foldable electronic device further comprises a fifth control module configured to electrically connect the first antenna assembly and the eleventh antenna assembly, and wherein the fifth control module is configured to control at least one of the first antenna assembly and the eleventh antenna assembly to transmit a bluetooth signal according to signal strength of the first antenna assembly and the eleventh antenna assembly.

15. The foldable electronic device of claim 12, further comprising a thirteenth antenna component located in the area enclosed by the first bezel, the thirteenth antenna component comprising an NFC antenna component having a radiator connected in series with at least one radiator on the first bezel to form a common body radiator.

16. The foldable electronic device of claim 12, wherein at least one of the first antenna assembly, the second antenna assembly, the third antenna assembly, the fourth antenna assembly, the fifth antenna assembly, the sixth antenna assembly, the seventh antenna assembly, the eighth antenna assembly, the ninth antenna assembly, the tenth antenna assembly, the eleventh antenna assembly, and the twelfth antenna assembly is a sensing antenna assembly for sensing proximity of a subject, the sensing antenna assembly further comprising at least one isolation capacitor, at least one proximity sensing sensor, and at least one isolation inductor, the isolation capacitor being electrically connected at least between a radiator of the sensing antenna assembly and a reference ground; the isolation inductor is electrically connected between a radiator of the induction antenna assembly and the proximity induction sensor, and the proximity induction sensor is used for detecting whether the body to be detected is close to the foldable electronic device through the radiator of the induction antenna assembly.

17. The foldable electronic device of any of claims 1-16, wherein the first bezel and the second bezel are both conductive bezels, and the first radiator, the second radiator, and the first coupling stub are all part of the conductive bezels; or,

the first frame and the second frame both comprise a conductor and a coating body coated on the conductor, and the first radiator, the second radiator and the first coupling branch are all parts of the conductor.