Electronic device

Abstract

The invention provides an electronic device. A frame comprises a holding area and a lap joint area. The antenna assembly comprises a first radiator and a first signal source, the first radiator comprises a first radiation section, a second radiation section and a third radiation section, and the second radiation section comprises a first feeding point; the first signal source is electrically connected with the first feeding point and used for exciting a first resonance mode supporting a first frequency band to be formed on the first radiator, the first radiation section or the third radiation section comprises a sinking part, and the sinking part is arranged on the inner side of the lap joint area of the frame and is spaced from the lap joint area of the frame; a first resonance current of the first resonance mode is at least distributed in the sinking part and the second radiation section, at least part of the second radiation section is a holding area of the frame, and the second radiation section is used for forming medium loading of the first resonance mode when being held. According to the invention, absorption of a hand to electromagnetic waves transmitted and received by the antenna is reduced, and the antenna performance in a handheld scene is improved.

Description

Technical Field

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

[0002] Mobile phones and other electronic devices are often used in handheld scenarios. How to reduce the hands' absorption of electromagnetic waves transmitted and received by the antenna and improve the antenna performance of electronic devices in handheld scenarios has become a technical problem that needs to be solved. Summary of the invention

[0003] The present application provides an electronic device that reduces the absorption of electromagnetic waves transmitted and received by an antenna by the hand and improves the antenna performance in a handheld scenario.

[0004] The present application provides an electronic device, comprising:

[0005] a frame, the frame comprising a gripping area and an overlapping area, the gripping area being gripped by a palm when the electronic device is in a first gripping scenario and being gripped by a thumb when the electronic device is in a second gripping scenario, and the overlapping area being overlapped by fingers when the electronic device is in a third gripping scenario; and

[0006] An antenna assembly includes a first radiator and a first signal source, wherein the first radiator includes a first radiating section, a second radiating section and a third radiating section which are interconnected as a whole and arranged in sequence, wherein an end of the first radiating section away from the second radiating section is a first free end, an end of the third radiating section away from the second radiating section is a first grounding end, and the second radiating section includes a first feeding point; the first signal source is electrically connected to the first feeding point, and is used to excite the first radiator to form a first resonant mode supporting a first frequency band, the first radiating section or the third radiating section includes a sinking portion, and the sinking portion is arranged on the inner side of the overlapping area of ​​the frame and is spaced apart from the overlapping area of ​​the frame; the first resonant current of the first resonant mode is distributed at least in the sinking portion and the second radiating section, at least a part of the second radiating section is the holding area of ​​the frame, and the second radiating section is used to form a medium loading for the first resonant mode when being held.

[0007] The present application sets a first signal source electrically connected to a first feeding point to excite the first radiator to form a first resonance mode supporting a first frequency band. The second radiation section of the antenna assembly is a part of the holding area of ​​the frame. The first resonance current of the first resonance mode is at least distributed in the second radiation section. The second radiation section is used to form a dielectric loading for the first resonance mode when being held. In this way, the radiation efficiency peak in the first resonance mode will shift toward the low-frequency side, and the radiation efficiency of the first frequency band will increase; the first radiation section or the third radiation section is set to include a sinking portion, the sinking portion is arranged on the inner side of the overlapping area of ​​the frame and is spaced from the overlapping area of ​​the frame, and the first resonance current of the first resonance mode is at least distributed in the sinking portion; in this way, the first free end is arranged on the inner side of the frame to avoid the first free end being blocked by the holding hand, reducing the frequency deviation and the hand's absorption of the horizontal electric field of the first free end; or, the strong current return position of the first resonance mode is arranged on the inner side of the frame, away from the holding hand, thereby reducing the hand's absorption of the electromagnetic waves radiated by the first resonance mode, reducing the reduction in radiation efficiency, and improving the antenna performance in the handheld scenario. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments are briefly introduced below.

[0009] Figure 1 It is a structural schematic diagram of an electronic device provided in an embodiment of the present application;

[0010] Figure 2 It is a schematic diagram of a partial decomposition structure of an electronic device provided in an embodiment of the present application;

[0011] Figure 3 is a partial back view of a first antenna assembly in an electronic device provided in an embodiment of the present application;

[0012] Figure 4 is a structural schematic diagram of a second antenna assembly for an electronic device provided in an embodiment of the present application;

[0013] Figure 5a is a schematic diagram of a left-hand holding scenario of a straight-screen mobile phone provided in an embodiment of the present application;

[0014] Figure 5b is a schematic diagram of a right-hand holding scenario of a straight-screen mobile phone provided in an embodiment of the present application;

[0015] Figure 6a It is a schematic diagram of a foldable mobile phone provided in an embodiment of the present application, with the hinge facing upward and held in the right hand;

[0016] Figure 6b It is a schematic diagram of a foldable mobile phone provided in an embodiment of the present application, wherein the mobile phone is held in the left hand with the hinge facing upward;

[0017] Figure 7a It is a schematic diagram of a right-hand holding scenario of a foldable mobile phone with the hinge facing downward provided in an embodiment of the present application;

[0018] Figure 7b It is a schematic diagram of a foldable mobile phone provided in an embodiment of the present application, wherein the mobile phone is held in the left hand with the hinge facing downward;

[0019] Figure 8 is a structural diagram of a first antenna assembly provided in an embodiment of the present application;

[0020] Fig. 9 yes Figure 8 A current distribution diagram of a first antenna assembly is provided;

[0021] Fig.10 This is a structural diagram of an antenna provided in an embodiment of the present application, in which the first free end is arranged on the frame and not arranged on the sunken part;

[0022] Fig.11 yes Fig.10 The S parameters and efficiency curves of the antenna assembly without a sinking part in the folding scenario are provided;

[0023] Fig.12 yes Fig.10 The S parameters and efficiency curves of the antenna assembly without a sinking portion provided in folding + free space, left hand holding and right hand holding;

[0024] Fig.13 yes Fig.10 The S parameters and efficiency curves of the provided antenna assembly without a sinking part obtained by simulation experiments in five scenarios: folding + free space, left hand holding, left hand holding without thumb, left hand holding with only thumb, and left hand holding with only palm;

[0025] Fig.14 is a structural diagram of a third antenna assembly provided in an embodiment of the present application;

[0026] Fig.15 is a structural diagram of a fourth antenna assembly provided in an embodiment of the present application;

[0027] Fig.16 is a structural diagram of a fifth antenna assembly provided in an embodiment of the present application;

[0028] Fig.17 is a current distribution diagram of a fifth antenna assembly provided in an embodiment of the present application;

[0029] Fig.18 It is a structural schematic diagram of a first antenna unit and an antenna assembly when the electronic device provided in an embodiment of the present application is a foldable electronic device;

[0030] Fig.19 yes Fig.18 A schematic diagram of the structure of the third radiator and the second radiator of the provided electronic device when folded;

[0031] Fig. 20 is a structural schematic diagram of a second type of first antenna unit and an antenna assembly when the electronic device provided in an embodiment of the present application is a foldable electronic device;

[0032] Fig.21 yes Fig. 20 A schematic diagram of the structure of the third radiator, the fourth radiator and the second radiator of the provided electronic device when folded;

[0033] Fig. 22 yes Fig.15 Provide the S parameters of the antenna assembly when the switch circuit is switched;

[0034] Fig.23 yes Fig.15 The radiation efficiency and overall curve of the antenna assembly provided when the switch circuit is switched;

[0035] Fig.24 yes Fig.15 The provided antenna assembly provides S parameters and efficiency curves in the folded + free space, folded + left-hand holding, and folded + right-hand holding scenarios when operating in the B28 frequency band;

[0036] Fig.25 yes Fig.15 The S-parameters and efficiency curves provided are for the folding hinge facing downward and supporting the B28 frequency band;

[0037] Fig.26 is a back structure diagram of an electronic device provided in an embodiment of the present application having a sixth antenna assembly;

[0038] Fig. 27 is a resonant current distribution diagram of the second resonant mode in the sixth antenna assembly provided in an embodiment of the present application;

[0039] Fig.28 is a resonant current distribution diagram of the first resonant mode in the sixth antenna assembly provided in an embodiment of the present application;

[0040] Fig.29 is a structural schematic diagram of an electronic device provided by an embodiment of the present application having a sixth antenna assembly and a first second antenna unit;

[0041] Fig.30 is a structural schematic diagram of an electronic device provided by an embodiment of the present application having a sixth antenna assembly and a second second antenna unit;

[0042] Fig.31is a structural schematic diagram of a sixth antenna assembly provided in an embodiment of the present application, which is switched to an inductor element and grounded through a first switch unit;

[0043] Fig.32 is a back structure diagram of an electronic device provided in an embodiment of the present application having a seventh antenna assembly;

[0044] Fig.33 is a resonant current distribution diagram of the first resonant mode of the seventh antenna assembly provided in an embodiment of the present application;

[0045] Fig.34 is a resonant current distribution diagram of the second resonant mode of the seventh antenna assembly provided in an embodiment of the present application;

[0046] Fig.35 yes Figure 4 A schematic diagram of the structure of the second antenna assembly;

[0047] Fig.36 is a resonant current distribution diagram of the third resonant mode of the second antenna assembly provided in an embodiment of the present application;

[0048] Fig.37 is a resonant current distribution diagram of the fourth resonant mode of the second antenna assembly provided in an embodiment of the present application;

[0049] Fig.38 yes Fig.10 A resonant current distribution diagram is provided in which the first free end is arranged on the frame and not on the antenna of the sinking part;

[0050] Fig.39 yes Fig.10 Another resonant current distribution diagram is provided in which the first free end is arranged on the frame and not on the antenna of the sinking part;

[0051] Fig.40 The S parameters, radiation efficiency and total efficiency of the antenna with the first free end A disposed on the frame operating in the B28 frequency band and in free space;

[0052] Fig.41 The S parameters, radiation efficiency and total efficiency of the antenna with the first free end A disposed on the frame operating in the B28 frequency band in free space, when held in the left hand and when held in the right hand;

[0053] Fig.42 yes Fig.36 S-parameters and efficiency of the provided antenna components;

[0054] Fig.43 yes Fig.36 Comparison of S parameters of the provided antenna assembly in right-hand holding / left-hand holding scenarios with an antenna whose first free end A is disposed on the frame;

[0055] Fig.44 yes Fig.36 The radiation efficiency comparison of the provided antenna assembly in the right-hand holding / left-hand holding scenario and the antenna with the first free end A disposed on the frame;

[0056] Fig.45 yes Fig.36 The overall efficiency of the provided antenna assembly is compared with that of an antenna whose first free end A is disposed on the frame in right-hand holding / left-hand holding scenarios.

[0057] Description of Figure Numbers:

[0058] Electronic device 1000; antenna assembly 100; display screen 200, middle frame 300 and back cover 400; middle plate 310; frame 320; first body 10 and second body 20; first side 323 and second side 324 of top edge 321 and bottom edge 322; gripping area Z1, overlapping area Z2 and open area Z3; first radiator 11 and first signal source 12; first radiating section 111, second radiating section 112 and third radiating section 113; first free end A; first feeding point B; first grounding end C; sinking part 114; extension Extension 115; second radiator 21; second ground terminal D and second free terminal E; first sub-side 323a; second sub-side 323b; first antenna unit 30; third radiator 31 and second signal source 32; third ground terminal F, second feeding point G and third free terminal H; fourth radiator 41; fourth ground terminal J and fourth free terminal K; fifth radiator 51; fifth free terminal L and fifth ground terminal N; inductor element L0; second antenna unit 40; capacitor element C0; first switch unit K1; fifth radiator 51; connection point P. DETAILED DESCRIPTION

[0059] The technical solution of the present application will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the embodiments described in the present application are only a part of the embodiments, not all of the embodiments. Based on the embodiments provided in the present application, all other embodiments obtained by ordinary technicians in this field without creative work belong to the protection scope of the present application.

[0060] Reference to "embodiments" in this application means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it mutually exclusive, independent, or alternative to other embodiments. It can be explicitly and implicitly understood by those skilled in the art that the embodiments described in this application can be combined with other embodiments.

[0061] The terms "first", "second", etc. in the specification and claims of this application and the above-mentioned drawings are used to distinguish different objects, rather than to describe a specific order. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions. For example: a component or device including one or more parts is not limited to the one or more parts listed, but optionally includes one or more parts that are not listed but inherent to the exemplified product, or one or more parts that it should have based on the described function.

[0062] See also Figure 1 , Figure 1 The following is a schematic diagram of the structure of an electronic device 1000 provided in an embodiment of the present application. The electronic device 1000 includes but is not limited to a mobile phone, a tablet computer, a laptop computer, a computer, a wearable device, a drone, a robot, a digital camera, and other devices with communication functions. The present embodiment of the present application is described using a mobile phone as an example, and other electronic devices may refer to this embodiment.

[0063] See also Figure 2 , the electronic device 1000 includes an antenna assembly 100. Taking the electronic device 1000 as a mobile phone as an example, the working environment of the antenna assembly 100 is illustrated. The electronic device 1000 includes a display screen 200, a middle frame 300 and a back cover 400 arranged in sequence along the thickness direction. Among them, the middle frame 300 includes a middle plate 310 and a frame 320 surrounding the periphery of the middle plate 310. The frame 320 may be a conductive frame. Of course, in other embodiments, the electronic device 1000 may not have a middle plate 310. The display screen 200, the middle plate 310 and the back cover 400 are stacked in sequence, and a receiving space is formed between the display screen 200 and the middle plate 310, and between the middle plate 310 and the back cover 400 to accommodate components such as a main board, a camera module, a receiver module, a battery, and various sensors. One side of the frame 320 is surrounded by the edge of the display screen 200, and the other side of the frame 320 is surrounded by the edge of the back cover 400 to form a complete appearance structure of the electronic device 1000. In this embodiment, the frame 320 and the middle plate 310 are an integral structure, and the frame 320 and the back cover 400 may be separate structures. The above is the working environment of the antenna assembly 100 taking a mobile phone as an example, but the antenna assembly 100 of the present application is not limited to the above working environment.

[0064] Optionally, the electronic device 1000 is a non-foldable electronic device, such as a bar-type mobile phone.

[0065] Optionally, the electronic device 1000 is a foldable electronic device, such as a foldable mobile phone. Specifically, the electronic device 1000 includes a first body 10 and a second body 20. The first body 10 and the second body 20 are movably connected (rotationally connected or slidably connected) to present a folded state or an unfolded state. When the first body 10 and the second body 20 are rotationally connected, the first body 10 and the second body 20 are connected by a rotating shaft, and at least one of the first body 10 and the second body 20 rotates around the rotating shaft. The display screen 200 is a flexible display screen.

[0066] See also Figure 3 , Figure 3 3 is a back view of the electronic device 1000. The frame 320 includes a top edge 321 and a bottom edge 322 that are arranged opposite to each other, and a first side edge 323 and a second side edge 324 that are connected to the top edge 321 and the bottom edge 322. The top edge 321 is the side away from the ground when the user holds the electronic device 1000 and uses it in portrait mode, and the bottom edge 322 is the side facing the ground when the user holds the electronic device 1000 and uses it in portrait mode. The first side edge 323 is the left side when the user holds the electronic device 1000 and uses it in portrait mode. The second side edge 324 is the right side when the user holds the electronic device 1000 and uses it in portrait mode. Of course, the first side edge 323 can also be the right side when the user holds the electronic device 1000 and uses it in portrait mode. The second side edge 324 is the left side when the user holds the electronic device 1000 and uses it in portrait mode. From the perspective of holding, when the user holds and uses the electronic device 1000 in portrait mode, the user generally holds the first side edge 323 and the second side edge 324, holds the bottom edge 322 of the portion held by the user, or does not hold the bottom edge 322, does not hold the top edge 321, and the distance between the user and the top edge 321 is greater than the distance between the user and the bottom edge 322. For example, if the electronic device 1000 is a mobile phone, the distance between the top edge 321 and the camera module in the electronic device 1000 is greater than the distance between the bottom edge 322 and the camera module in the electronic device 1000.

[0067] See also Figure 3, the frame 320 includes a gripping area Z1, an overlapping area Z2 and an open area Z3. The gripping area Z1 is held by the palm when the electronic device 1000 is in the first gripping scenario and is held by the thumb when the electronic device 1000 is in the second gripping scenario. The overlapping area Z2 is overlapped by the fingers when the electronic device 1000 is in the third gripping scenario. The open area Z3 will not be blocked by the hand in the above-mentioned first gripping scenario, the second gripping scenario and the third gripping scenario. The first side 323 and the second side 324 both include a gripping area Z1 and an overlapping area Z2. The open area Z3 is provided at the bottom edge 322. The first gripping scenario includes but is not limited to a left-hand gripping scenario of a non-foldable electronic device, a left-hand gripping scenario with the hinge of a foldable mobile phone facing upward, etc. The second gripping scenario includes but is not limited to a left-hand gripping scenario with the hinge of a foldable mobile phone facing downward, etc. The third gripping scenario includes but is not limited to a right-hand gripping scenario with the hinge of a foldable mobile phone facing upward, and a right-hand gripping scenario with the hinge of a foldable mobile phone facing downward.

[0068] See also Figure 3 and Figure 4 , taking the gripping area Z1 and the overlapping area Z2 being located at the first side 323 as an example, the gripping area Z1 is located at a position of the first side 323 close to the bottom 322, for example, the distance between the gripping area Z1 on the first side 323 and the bottom 322 is less than the first preset value. The first preset value range is 20-40mm. The gripping area Z1 also includes an area of ​​the bottom 322 close to the first side 323, for example, the gripping area Z1 is located at a distance from the bottom 322 to the first side 323 that is less than or equal to the second preset value, and the second preset value range is 10-20mm. The overlapping area Z2 is located on the side of the gripping area Z1 on the first side 323 away from the bottom 322. The distance between the overlapping area Z2 and the bottom 322 is greater than or equal to 20mm. The open area Z3 is located at the bottom 322, and the distance between the open area Z3 and the first side 323 is greater than or equal to the third preset value, and the third preset value range is 10-20mm. The distance between the open zone Z3 and the second side edge 324 is greater than or equal to a third preset value, and the range of the third preset value is 10-20 mm.

[0069] The following Figure 5a-Figure 7b The holding area Z1 and the overlapping area Z2 on the first side 323 in various holding scenarios are specifically described with examples.

[0070] See also Figure 5a The first holding scenario is the left hand holding scenario of the straight phone, the area of ​​the first side edge 323 close to the bottom edge 322 is the holding area Z1 for palm holding; the area of ​​the bottom edge 322 close to the middle is the open area Z3.

[0071] See also Figure 5bThe third holding scenario is the right-hand holding scenario of a straight-screen mobile phone. The lower middle part of the first side edge 323 is an overlap zone Z2 for overlapping fingers; the area near the middle of the bottom edge 322 is an open zone Z3.

[0072] See also Figure 6a The third holding scenario is a right-hand holding scenario with the hinge of the folded mobile phone facing upward. The lower middle part of the first side edge 323 is an overlapping area Z2 for overlapping fingers; the area near the middle of the bottom edge 322 is an open area Z3.

[0073] See also Figure 6b The first holding scenario is a left-hand holding scenario with the hinge of the folded mobile phone facing upward. The area of ​​the first side edge 323 close to the bottom edge 322 is the holding area Z1 for palm holding; the area of ​​the bottom edge 322 close to the middle is the open area Z3.

[0074] See also Figure 7a The third holding scenario is a right-hand holding scenario with the hinge of the folded mobile phone facing downward. The portion of the first side edge 323 close to the bottom edge 322 is the holding area Z1 for thumb holding; the area close to the middle of the bottom edge 322 is the open area Z3.

[0075] See also Figure 7b The second holding scenario is a left-hand holding scenario with the hinge of the folded mobile phone facing downward. The lower middle part of the first side edge 323 is the overlapping area Z2; the area near the middle of the bottom edge 322 is the open area Z3.

[0076] Of course, in other embodiments, the gripping area Z1 and the overlapping area Z2 may also be located on the second side 324, which is specifically mirror-symmetrical to the above-mentioned embodiment.

[0077] It can be understood that due to the difference in the size of the palms of different users, when different users hold the same electronic device 1000 with the same gesture, there will be certain differences in the position where the fingers overlap on the frame 320 of the electronic device 1000 and the position where the palm is held on the frame of the electronic device 1000. As an example, the overlap zone Z2 and the holding zone Z1 described in the present application can be the corresponding areas formed when users with palms of any size hold the electronic device 1000 of the present application with the same gesture. For example, the overlap zone Z2 of the present application can be the area where the frame 320 of the electronic device 1000 is overlapped by the fingers when the user with palms of any size holds the electronic device 1000 of the present application with the same gesture; the holding zone Z1 can be the area where the frame 320 of the electronic device 1000 is covered by the palm (or thumb) and in contact with the palm (or thumb) when the user with palms of any size holds the electronic device 1000 of the present application with the same posture.

[0078] The specific structure of the antenna assembly 100 is described below by way of example with reference to the accompanying drawings.

[0079] See also Figure 8 The antenna assembly 100 includes a first radiator 11 and a first signal source 12 .

[0080] The first radiator 11 is a port for the antenna assembly 100 to send and receive radio frequency signals. The radio frequency signal is transmitted in the air medium in the form of an electromagnetic wave signal. The present application does not specifically limit the material of the first radiator 11. Optionally, the material of the first radiator 11 is a conductive material, including but not limited to conductive materials such as metals and alloys.

[0081] The present application does not specifically limit the shape of the first radiator 11. For example, the shape of the first radiator 11 includes but is not limited to a strip, a sheet, a rod, a coating, a film, and the like. Figure 8 The first radiator 11 shown is only an example and does not limit the shape of the first radiator 11 provided in the present application. In this embodiment, the first radiator 11 is in a strip shape. The present application does not limit the extension track of the first radiator 11.

[0082] Optionally, the form of the first radiator 11 includes but is not limited to a metal frame, a metal frame embedded in a plastic frame, a metal radiator 11 located inside or on the surface of the frame 320, a flexible circuit board antenna formed on a flexible circuit board (Flexible Printed Circuit board, FPC), a laser direct structured antenna by laser direct structured (Laser Direct Structuring, LDS), a printed direct structured antenna by printing direct structured (Print Direct Structuring, PDS), a conductive sheet antenna (such as a metal bracket antenna), etc.

[0083] See also Fig. 9 The first radiator 11 includes a first radiating section 111, a second radiating section 112 and a third radiating section 113 which are interconnected and arranged in sequence. The specific division of the first radiating section 111, the second radiating section 112 and the third radiating section 113 is described in detail below.

[0084] See also Fig. 9 , one end of the first radiation section 111 away from the second radiation section 112 is a first free end A. One end of the third radiation section 113 away from the second radiation section 112 is a first ground end C. The first ground end C is used to electrically connect to the reference ground. The first free end A is an end disconnected from other conductive materials.

[0085] Please also read Figure 3 and Figure 8, at least part of the second radiation section 112 is the holding area Z1 of the frame 320. Specifically, part of the second radiation section 112 is the holding area Z1 on the frame 320, or the entire second radiation section 112 is the holding area Z1 on the frame 320. In the first holding scenario and the second holding scenario, part or all of the second radiation section 112 is held by the palm or thumb, creating conditions for forming medium loading.

[0086] Please also read Figure 8 and Fig. 9 , the second radiation section 112 includes a first feeding point B. The first signal source 12 is electrically connected to the first feeding point B, and is used to excite the first radiator 11 to form a first resonance mode supporting the first frequency band, and the first resonance current of the first resonance mode is distributed at least in the second radiation section 112. Further, the first radiator 11 and the first signal source 12 form an IFA antenna. The working mode of the first resonance mode is a 1 / 4 wavelength mode of the first frequency band, and the area where the first feeding point B is located is a high current area. Further, the first resonance current of the first resonance mode on the second radiation section 112 is a high current. The second radiation section 112 is used to form a dielectric loading on the first resonance mode when being held.

[0087] In this embodiment, the efficiency of the second radiation section 112 after loading the medium for forming the first resonance mode when being held is greater than the efficiency of the second radiation section 112 without loading the medium for forming the first resonance mode. In other words, the second radiation section 112 is used to improve the efficiency after loading the medium for forming the first resonance mode when being held.

[0088] The following is a specific description of the dielectric loading formed by the antenna assembly 100 when the electronic device 1000 is in a gripping state: since at least part of the second radiation segment 112 is the gripping area Z1 of the frame 320. The gripping area Z1 in various hand-held states is described above by way of example. By setting the position of the antenna assembly 100, the gripping area Z1 in which at least part of the second radiation segment 112 is located on the frame 320 is set. In other words, when the electronic device 1000 is in a gripping state, the hand contacts the second radiation segment 112. The equivalent dielectric constant of the hand is relatively large, for example, 25-40, which is much larger than the dielectric constant 0 in the air. Therefore, the hand contacting the second radiation segment 112 is equivalent to changing the radiation environment of the electromagnetic wave radiated by the second radiation segment 112. The hand forms a high dielectric constant medium in the radiation space of the electromagnetic wave. Based on the principle that the wavelength of the electromagnetic wave will be shortened in a high dielectric constant medium, allowing the medium (such as the hand) to cover or surround the radiator can greatly reduce the volume of the antenna in the corresponding frequency band, that is, the dielectric loading can play a miniaturization role. In the electronic device 1000, since the length of the second radiation segment 112 is equal before and after holding the hand, the equivalent dielectric constant around the second radiation segment 112 is changed after holding the hand. Since the electrical length of the second radiation segment 112 remains unchanged, according to the wavelength shortening effect, the radiation capacity will shift toward the low frequency, that is, the radiation efficiency peak shifts toward the low frequency side.

[0089] The second radiation section 112 operates in the first resonance mode to form a strong current. During the radiation process, the strong current encounters a high dielectric constant medium formed by the hand. In this way, the radiation efficiency peak in the first resonance mode will shift toward the low-frequency side. Since the radiation efficiency of the first resonance mode in the first frequency band and the high-frequency side of the first frequency band gradually increases, that is, the radiation efficiency on the high-frequency side of the first frequency band is higher than the radiation efficiency of the first frequency band. Therefore, after the radiation efficiency peak of the first resonance mode shifts toward the low-frequency side, the radiation efficiency of the first frequency band increases, that is, the antenna assembly 100 described in this article forms a dielectric loading in the hand-held state and in the first resonance mode, thereby improving the radiation efficiency in the first resonance mode.

[0090] Generally speaking, when the hand touches the radiator of the antenna component 100, the hand has an absorption effect on the electromagnetic waves radiated by the radiator. In the present application, since the area touched by the hand is not the radiation section where the first free end A is located, and the efficiency improvement brought by the dielectric loading of the hand on the antenna component 100 is greater than the efficiency reduction brought by the absorption effect of the hand, it is generally presented that the antenna component 100 forms dielectric loading in the hand-held state and the first resonance mode, thereby improving the radiation efficiency in the first resonance mode.

[0091] The present application does not limit the specific size of the first frequency band. Optionally, the first frequency band includes but is not limited to low frequency, and the low frequency is a frequency band less than 1 GHz. Further, the first frequency band is less than or equal to 0.9 GHz. When the first frequency band is less than or equal to 0.9 GHz, the efficiency improvement brought by the dielectric loading of the hand on the antenna assembly 100 is greater than the efficiency reduction brought by the absorption effect of the hand.

[0092] The following compares the efficiency curves of a group of antenna assemblies 100 in the free space, left-hand holding, and right-hand holding scenarios when the electronic device 1000 is in a folded state and the first frequency band is the B28 frequency band. Fig.10 The provided antenna assembly 100 without a sinking portion is in the form of an IFA antenna + a parasitic antenna, and has no sinking portion, so as to perform efficiency comparison solely for the medium loading formed by holding the second radiation section 112 by a hand or in free space.

[0093] See also Fig.10 , Fig.10 The arrow in FIG. 1 shows the working current distribution of the antenna assembly 100 without a sinking portion. The current of the antenna assembly 100 without a sinking portion flows from the first ground terminal C to the first free terminal A, and the current is a 1 / 4 wavelength current of the B28 frequency band.

[0094] See also Fig.11 , Fig.11 yes Fig.10 The S parameter and efficiency curve of the antenna assembly 100 without a sinking part in a folding scenario are provided. Curve a is the S parameter of the antenna assembly 100 without a sinking part in free space. Curve b is the radiation efficiency of the antenna assembly 100 without a sinking part in free space. Curve c is the total efficiency of the antenna assembly 100 without a sinking part in free space.

[0095] See also Fig.12 , Fig.12 yes Fig.10 The provided antenna assembly 100 without a sinking portion has S parameters and efficiency curves in folding + free space, left-hand holding, and right-hand holding.

[0096] The antenna assembly 100 without the sinking portion is held in the left hand and in the right hand in the folded scene. Figure 6a , Figure 6b As shown, in the left-hand holding scenario, since the second radiating section 112 of the antenna assembly 100 without a sinking portion is located in the holding zone Z1, the second radiating section 112 of the antenna assembly 100 without a sinking portion contacts the left palm. When holding with the right hand, since the third radiating section 113 of the antenna assembly 100 without a sinking portion is located in the overlapping zone Z2, the radiating section above the second radiating section 112 of the antenna assembly 100 without a sinking portion contacts the fingers of the right hand.

[0097] Curve a1 is the S parameter of the antenna assembly 100 without a sinker in free space. Curve b1 is the radiation efficiency of the antenna assembly 100 without a sinker in free space. Curve c1 is the total efficiency of the antenna assembly 100 without a sinker in free space. Curve a2 is the S parameter of the antenna assembly 100 without a sinker when held in the left hand. Curve b2 is the radiation efficiency of the antenna assembly 100 without a sinker when held in the left hand. Curve c2 is the total efficiency of the antenna assembly 100 without a sinker when held in the left hand. Curve a3 is the S parameter of the antenna assembly 100 without a sinker when held in the right hand. Curve b3 is the radiation efficiency of the antenna assembly 100 without a sinker when held in the right hand. Curve c3 is the total efficiency of the antenna assembly 100 without a sinker when held in the right hand.

[0098] By comparing curves b1, b2, and b3, it can be seen that the radiation efficiency curve of the antenna assembly 100 without a sinking portion when held in the left hand is shifted toward the low frequency relative to the radiation efficiency curve of the antenna assembly 100 without a sinking portion when in free space, and the radiation efficiency of the antenna assembly 100 without a sinking portion when held in the left hand is higher than the radiation efficiency when held in free space and in the right hand, indicating that in the B28 frequency band, the dielectric loading effect of the second radiation section 112 improves the efficiency of the B38 frequency band.

[0099] Please refer to Table 1-1, which is a comparison of the total efficiency of the antenna assembly 100 without a sinking part in folding + free space, left hand holding and right hand holding. It can be seen that in the left-hand holding scenario, the performance after holding is greatly improved compared with the free space and right-hand holding scenarios. Not only does it not decrease due to the absorption of the hand, but it has been greatly improved in the left-hand holding scenario. In the left-hand holding scenario, the palm of the left hand is against the antenna, and the palm forms a dielectric loading for the antenna assembly 100 without a sinking part, so that the radiation efficiency peak on the high-frequency side of the first frequency band moves toward the low frequency, and the efficiency peak moves to the position of the first frequency band, so that the radiation efficiency of the first frequency band is improved. When holding with the right hand, the ring finger of the right hand is close to the antenna, and it is easy to hold the gap, resulting in a certain frequency deviation and efficiency reduction.

[0100] Table 1-1

[0101]

[0102]

[0103] Further, taking the left-hand holding scenario of the B28 band as an example, please refer to Fig.13 , Fig.13 yes Fig.10The provided antenna assembly 100 without a sinking portion is subjected to simulation experiments to obtain S parameters and efficiency curves in five scenarios: folded + free space (a1, a2 curves), held in the left hand (b1, b2 curves), held in the left hand without the thumb (c1, c2 curves), held in the left hand with only the thumb left (d1, d2 curves), and held in the left hand with only the palm left (e1, e2 curves).

[0104] Comparing the radiation efficiency curves a2, b2, c2, d2, and e2, the efficiency of free space (a2 curve) and the efficiency of the left hand holding with only the thumb left (d2 curve) are consistent, indicating that the thumb has little effect on the main efficiency improvement in the hand holding scenario. The efficiency of the left hand holding (b2 curve) and the efficiency of the left hand holding without the thumb (c2 curve) are basically consistent, which again shows that the thumb has little effect, and the efficiency c2 curve performance in the thumb-removed scenario is slightly higher than the efficiency (b2 curve) of the left hand holding, indicating that the thumb is mainly affected by absorption in the left hand holding scenario. The efficiency of the left hand holding with only the palm (e2 curve) is the highest, and the peak is close to the peak in the free scenario. This also shows that the peak efficiency of the hand holding is low and biased, and the palm plays a major role. The efficiency is significantly improved in the B28 band, while the other fingers are mainly affected by absorption. Overall, the palm (including all fingers) still has an improvement effect in the B28 band.

[0105] In the present application, the second radiation section 112 (high current area) of the antenna assembly 100 is arranged in the holding area Z1. Furthermore, the second radiation section 112 (high current area) of the antenna assembly 100 is arranged in the holding area Z1 for palm holding to form a dielectric loading effect in the second frequency band to improve efficiency. The second radiation section 112 of the antenna assembly 100 is arranged in the holding area Z1 for palm holding in the left hand holding scenario, and the radiation section (the first radiation section 111 or the third radiation section 113) near the second radiation section 112 is located in the finger holding in the right hand holding scenario. For the problem that the absorption effect caused by the finger holding this area leads to a decrease in radiation efficiency, the following improvements are made.

[0106] The following improvements are made to the first radiation section 111 and the third radiation section 113: Figure 3 , Figure 4 and Fig. 9 At least part of the first radiation section 111 or at least part of the third radiation section 113 is located in the overlap zone Z2, and at least one of the first radiators 11 located in the overlap zone Z2 includes a sinking portion 114. The sinking portion 114 is disposed inside the frame 320 and spaced apart from the frame 320.

[0107] Optional, see Figure 3 and Fig. 9, the material of the sinking part 114 is a conductive material. The sinking part 114 is located inside the frame 320, and the sinking part 114 can be parallel to the frame 320 and arranged at intervals. In this way, when the hand holds the frame 320, the hand will not directly hold the sinking part 114. Optionally, the sinking part 114 can be an integrated interconnected structure with the frame 320. The sinking part 114 and the frame 320 are formed by washing and cutting the same conductive plate.

[0108] The first resonant current of the first resonant mode is distributed at least in the sinking portion 114 .

[0109] In an alternative embodiment, see Figure 4 and Fig.14 The sinking portion 114 is located in the first radiation segment 111 , and the first resonant current of the first resonant mode flows from the first ground end C of the third radiation segment 113 to the first free end A of the first radiation segment 111 through the second radiation segment 112 and the sinking portion 114 .

[0110] Furthermore, the sinking portion 114 includes a first free end A. Since the first free end A is disposed adjacent to the insulating gap, there is a horizontal electric field (parallel to the direction of the first radiation segment 111) in the insulating gap. When the hand holds the horizontal electric field, the horizontal electric field is basically absorbed by the hand. By arranging the sinking portion 114 on the inner side of the frame 320, the first free end A is arranged on the inner side of the frame 320 to avoid the first free end A being blocked by the holding hand, reduce frequency deviation and reduce the hand's absorption of the horizontal electric field of the first free end A, thereby ensuring the antenna performance of the antenna assembly 100.

[0111] In two alternative implementations, see Figure 3 and Fig. 9 The sinking portion 114 is located in the third radiation segment 113 , and the first resonant current of the first resonant mode flows from the first ground end C of the third radiation segment 113 through the sinking portion 114 and the second radiation segment 112 to the first free end A of the first radiation segment 111 .

[0112] Since the antenna assembly 100 in the present application is an IFA antenna, the area between the first ground terminal C and the first feeding point B is a high current area of ​​the first resonance mode. That is, the sinking portion 114 is a high current area of ​​the first resonance mode. In this way, by arranging the high current area of ​​the first resonance mode inside the frame 320, away from the holding hand (for example, away from the fingers when holding the right hand), the absorption of the electromagnetic waves radiated by the first resonance mode by the hand is reduced, thereby reducing the reduction in radiation efficiency.

[0113] The present application does not specifically limit the length of the first radiation segment 111 , the length of the second radiation segment 112 , and the length of the third radiation segment 113 .

[0114] The length of the first radiation section 111 is close to 1 / 4-1 / 3 of the total length of the first radiator 11 .

[0115] Optionally, the length of the second radiation section 112 is less than 3 / 4 of the total length of the first radiator 11. Further, the length of the second radiation section 112 is about 10 mm-40 mm, and further, the length of the second radiation section 112 is about 20 mm-35 mm, so that when the electronic device 1000 is in a handheld state, the second radiation section 112 completely corresponds to and contacts the palm part / finger part, thereby forming a dielectric loading effect, and improving the radiation efficiency of the electronic device 1000 in a handheld state.

[0116] Optionally, the length of the third radiation section 113 is less than or equal to the length from the first ground terminal C to the first feeding point B. The length of the third radiation section 113 is less than or equal to ¾ of the total length.

[0117] Optionally, at least part of the current on the third radiation section 113 is a strong current in the first resonance mode, and at least part of the current on the second radiation section 112 is a strong current in the first resonance mode.

[0118] Among them, the vicinity of the first free end A (the length is about 1 / 4 of the total length of the first radiator 11) is a weak current segment. The current intensity of the strong current segment is greater than the current intensity on the weak current segment. The first ground terminal C and the first feeding point B are both strong current points in the first resonance mode. The strong current segment of the first radiator 11 in the first resonance mode is the area from the first ground terminal A to the position where the length from the first ground terminal A is 3 / 4 of the total length of the first radiator 11.

[0119] In the present application, the second radiation section 112 is set as a part of the holding area Z1 of the frame 320; the first signal source 12 is electrically connected to the first feeding point B, which is used to excite the first radiator 11 to form a first resonance mode supporting the first frequency band, and the first resonance current of the first resonance mode is distributed in at least the second radiation section 112, and the second radiation section 112 is used to form a dielectric loading for the first resonance mode when being held, so that the radiation efficiency peak in the first resonance mode will shift toward the low-frequency side, and the radiation efficiency of the first frequency band will increase; the first radiation section 111 or the third radiation section 113 is set to include a sinking portion 114, and the sinking portion 114 is arranged on the The first resonant current of the first resonant mode is arranged inside the overlapping area Z2 of the frame 320 and is spaced apart from the overlapping area Z2 of the frame 320, and the first resonant current of the first resonant mode is distributed at least in the sinking portion 114; in this way, the first free end A is arranged inside the frame 320 to avoid the first free end A being blocked by the holding hand, thereby reducing the frequency deviation and the hand's absorption of the horizontal electric field of the first free end A; or, the strong current return position of the first resonant mode is arranged inside the frame 320, away from the holding hand, thereby reducing the hand's absorption of the electromagnetic waves radiated by the first resonant mode, reducing the reduction in radiation efficiency, and improving the antenna performance of the antenna assembly 100 in the hand-held scenario.

[0120] Through the above design, the antenna assembly 100 can form a dielectric loading effect in the holding area Z1 to improve the radiation efficiency in the left-hand holding scenario of the straight-screen mobile phone, the left-hand holding scenario of the folding mobile phone with the hinge facing upward, and the left-hand holding scenario of the folding mobile phone with the hinge facing downward; and form a sinking portion 114 in the overlapping area Z2 in the right-hand holding scenario of the straight-screen mobile phone, the right-hand holding scenario of the folding mobile phone with the hinge facing upward, and the right-hand holding scenario of the folding mobile phone with the hinge facing downward, so that the strong current segment on the sinking portion 114 does not directly contact the hand, reducing the absorption effect of the hand, thereby reducing the efficiency reduction in holding scenarios such as the right-hand holding scenario of the straight-screen mobile phone, the right-hand holding scenario of the folding mobile phone with the hinge facing upward, and the right-hand holding scenario of the folding mobile phone with the hinge facing downward.

[0121] The electronic device 1000 provided in the present application includes but is not limited to being a straight plate type or a folding type. Generally, the low-frequency antenna on the folding electronic device 1000 is more dependent on the auxiliary radiation of the reference floor. When the electronic device 1000 is folded, the area of ​​the reference floor is halved, resulting in a relatively reduced radiation performance of the low-frequency antenna. In addition, due to the absorption of the hand-held scene and the shielding of the horizontal electric field at the free end, the performance of the low-frequency antenna is relatively low. Through the above-mentioned design, the present application can improve the performance of the low-frequency antenna when folded, and improve the anti-folding and anti-hand-holding performance of the low-frequency antenna.

[0122] Taking the example in which the second radiating section 112 is located in the palm holding area Z1 for left hand holding, and the sunken portion 114 is located in the finger holding area Z1 for right hand holding, the above-mentioned design provided in the embodiment of the present application can improve the efficiency of the electronic device 1000 when held in the left hand, and reduce the efficiency reduction when held in the right hand, thereby improving the anti-hand holding performance of the electronic device 1000.

[0123] Optional, see Fig. 9 and Fig.14 , the antenna assembly 100 also includes a matching circuit M. The matching circuit M is electrically connected between the first feeding point B and the first signal source 12. The matching circuit M is used to adjust the impedance matching between the port of the first signal source 12 and the port of the first radiator 11. The matching circuit M includes at least one of a capacitor and an inductor. Further, the matching circuit M also includes a switch selection circuit, which is used to select devices with different impedances to work, so as to adjust the electrical length of the first radiator 11, thereby changing the caliber of the first radiator 11 and adjusting the electrical length of the first radiator 11.

[0124] The matching circuit M includes, but is not limited to, a series circuit of a capacitor and an inductor, a parallel circuit of a capacitor and an inductor, a series circuit formed by a parallel connection of a capacitor and an inductor + a capacitor, a series circuit formed by a parallel connection of a capacitor and an inductor + an inductor, a series circuit formed by a series connection of a capacitor and an inductor + a parallel circuit formed by a series connection of a capacitor and an inductor + a parallel circuit formed by a series connection of a capacitor and an inductor + an inductor, a series circuit formed by a parallel connection of a capacitor and an inductor + a parallel connection of a capacitor and an inductor, a series circuit formed by a series connection of a capacitor and an inductor + a parallel connection of a capacitor and an inductor, and the like.

[0125] See also Fig. 9 , the sinking portion 114 is arranged in the third radiation section 113. The end of the sinking portion 114 away from the second radiation section 112 is the first ground terminal C. That is, the sinking portion 114 includes the first ground terminal C. In this embodiment, the antenna assembly 100 is an IFA antenna, and the first ground terminal C is a high current return position. By using the first ground terminal C and the nearby high current area as the sinking portion 114, the sinking portion 114 is arranged on the inner side of the frame 320 and is spaced from the frame 320, that is, the high current area of ​​the first resonance mode is arranged on the inner side of the frame 320, away from the holding hand (for example, away from the fingers when holding with the right hand), thereby reducing the hand's absorption of the electromagnetic waves radiated by the first resonance mode, reducing the reduction in radiation efficiency, for example, reducing the absorption of electromagnetic wave signals by the fingers when holding with the right hand, and ensuring the performance of the electronic device 1000 when held with the right hand.

[0126] Optionally, the gripping area Z1 is located at a position where the first side edge 323 is close to the bottom edge 322. For example, the gripping area Z1 is located at the lower right corner of the electronic device 1000, and the length of the gripping area Z1 at the first side edge 323 is 20-35 mm. The gripping area Z1 is the palm contact area when the left hand is holding.

[0127] See also Figure 5a-Figure 6b , the frame 320 also includes an open area Z3 disposed adjacent to the gripping area Z1. The open area Z3 is not gripped when the electronic device 1000 is in the gripping state. Optionally, the open area Z3 is located at a position where the bottom edge 322 is close to the second side edge 324. That is, the open area Z3 can be located at a position where the bottom edge 322 of the electronic device 1000 is close to the lower right corner.

[0128] In this embodiment, the third radiation section 113 is arranged in the holding area Z1 or on the side of the holding area Z1 away from the bottom edge 322. The first radiation section 111 is arranged at a position close to the lower right corner of the bottom edge 322, and the first radiation section 111 is located at the bottom edge 322 of the electronic device 1000. The first free end A of the first radiation section 111 is arranged at the open area Z3 of the frame 320. Furthermore, the length of the first radiation section 111 is greater than 10 mm, so that the distance between the first free end A and the right side of the electronic device 1000 is greater than 10 mm, and the first free end A can avoid the position of the palm holding, thereby avoiding the first free end A from being covered by the holding, and avoiding frequency deviation.

[0129] Of course, in other embodiments, the holding area Z1 is located at a position where the first side edge 323 is close to the bottom edge 322, and the open area Z3 is located at a position where the bottom edge 322 is close to the first side edge 323. The first free end A of the first radiating section 111 is disposed at the open area Z3 of the frame 320. Further, the length of the first radiating section 111 is greater than 10 mm, so that the distance between the first free end A and the right side of the electronic device 1000 is greater than 10 mm, and the first free end A can avoid the position of the palm holding, thereby preventing the first free end A from being covered by the holding, and avoiding frequency deviation.

[0130] In an alternative embodiment, see Fig. 9 The frame 320 is divided into two parts by an insulating gap. One part of the frame 320 serves as the second radiation segment 112, one end of the second radiation end is bent and connected to the sinking part 114, and the other part of the frame 320 is arranged on the outer side of the sinking part 114 and is spaced apart from or insulated from the sinking part 114.

[0131] In another embodiment, see Fig.15, the third radiation section 113 also includes an extension portion 115 arranged side by side with the sinking portion 114. The extension portion 115 is a part of the gripping area Z1 of the frame 320. One end of the extension portion 115 and one end of the sinking portion 114 are both connected to the end of the second radiation section 112 away from the first radiation section 111. The other end of the extension portion 115 is bent and connected to the sinking portion 114. The present application does not limit the position where the other end of the extension portion 115 is connected to the sinking portion 114. Optionally, the other end of the extension portion 115 can be connected to the first grounding terminal C of the sinking portion 114 or close to the first grounding terminal C; or, the other end of the extension portion 115 can be connected to the middle position of the sinking portion 114; or, the other end of the extension portion 115 can be connected to the position of the sinking portion 114 close to the second radiation section 112.

[0132] The extending portion 115 and the sinking portion 114 surround and form a hollow area, that is, the extending portion 115 and the sinking portion 114 form a ring structure.

[0133] See also Fig.15 , the first resonant current of the first resonant mode flows from the first ground terminal C to the first free end A through two paths, the sinking portion 114 and the extending portion 115. Among them, the sinking portion 114 shares the current of the extending portion 115, and thus the current intensity of the extending portion 115 is reduced compared to when the sinking portion 114 is not provided. In this way, part of the resonant current is kept away from the finger, reducing the absorption effect when the finger holds the third radiation section 113. In addition, the extending portion 115 and the sinking portion 114 form a ring, which also avoids the first resonant current of the first resonant mode from flowing from the first ground terminal C through the sinking portion 114 to the extending portion 115, and generating clutter, affecting the first resonant mode or other resonant modes, and thus affecting the antenna radiation performance.

[0134] The antenna assembly 100 in the embodiment of the present application is an IFA antenna. The electrical length of the first radiator 11 is close to 1 / 4 wavelength of the first frequency band. The first resonant mode is a 1 / 4 wavelength mode resonating from the first ground end C to the first free end A. The 1 / 4 wavelength mode is the ground mode of the IFA antenna. At this time, the antenna assembly 100 has a higher radiation efficiency in the first frequency band.

[0135] The electrical length described in this application can satisfy the following formula:

[0136]

[0137] Where L is the physical length, a is the transmission time of the electrical or electromagnetic signal in the medium, and b is the transmission time in free space.

[0138] See also Fig.16 The antenna assembly 100 also includes a second radiator 21.

[0139] See also Fig.16 and Fig.17 The second radiator 21 includes a second ground terminal D and a second free terminal E. The second ground terminal D is electrically connected to the reference ground, and the second free terminal E is an end disconnected from other conductive structures.

[0140] See also Fig.16 and Fig.17 , the second radiator 21 is a part of the frame 320. The second free end E is spaced apart from the first radiator 11. The second ground end D is located on a side of the second free end E away from the first radiator 11. At least part of the sinking portion 114 is located on the inner side of the second radiator 21 and spaced apart from the second radiator 21.

[0141] Optionally, when the extension portion 115 is not provided, there is a gap between the second free end E and the end of the second radiation section 112 connected to the sinking portion 114. The second radiator 21 is provided outside the entire sinking portion 114, and the second radiator 21 is parallel to and spaced from the sinking portion 114. The second grounding end D is located on a side of the first grounding end C away from the second radiation section 112.

[0142] Optional, see Fig.16 and Fig.17 When the extension portion 115 is provided, a gap is formed between the second free end E and the end of the extension portion 115 connected to the sinking portion 114. The second radiator 21 is provided outside a portion of the sinking portion 114, and the second radiator 21 is parallel to and spaced from the sinking portion 114. The second grounding end D is located on a side of the first grounding end C away from the second radiating section 112.

[0143] In an embodiment where the sinking portion 114 is disposed on the first radiation segment 111 and includes the first free end A, the second radiator 21 may be disposed outside the first free end A of the sinking portion 114 .

[0144] In this embodiment, the second radiator 21 is disposed outside the sinking portion 114, which can reduce the absorption of electromagnetic waves radiated by the finger in the first resonance mode, thereby reducing the absorption of electromagnetic waves by the finger of the right hand holding, for example, and reducing the reduction of radiation efficiency in the right hand holding scenario or preventing the radiation efficiency in the right hand holding scenario from being reduced. Since the second radiator 21 is grounded, when the finger touches the second radiator 21, the static electricity on the finger can be conducted away, reducing the influence of static electricity on the finger.

[0145] In the first implementation, see Figure 5a and Figure 5b , the electronic device 1000 is a straight-type mobile phone, that is, a non-foldable electronic device.

[0146] In the second implementation, please refer to Figure 6a and Figure 6b , the electronic device 1000 is a foldable electronic device.

[0147] See also Fig.18 The electronic device 1000 includes a first body 10 and a second body 20 that can be folded relative to each other. The first body 10 and the second body 20 are movably connected (rotatably connected or slidably connected) to present a folded state or an unfolded state.

[0148] The antenna assembly 100 is disposed on the second body 20 (corresponding to the lower half in this application).

[0149] See also Fig.18 Taking the example that the first body 10 and the second body 20 are rotatably connected via a rotating shaft, the portion of the first side 323 disposed on the first body 10 is the first sub-side 323a, and the portion of the second side 324 disposed on the second body 20 is the second sub-side 323b.

[0150] A portion of the radiator of the antenna assembly 100 is disposed on the bottom side 322 , another portion of the radiator is disposed on the second sub-side 323 b close to the bottom side 322 , and the second radiator 21 is disposed on the second sub-side 323 b close to the rotation axis.

[0151] See also Fig.18 The first body 10 further includes a first antenna unit 30. The first antenna unit 30 is disposed on the first body 10. Further, a radiator of the first antenna unit 30 is disposed on the first sub-side 323a.

[0152] When folded, the second radiator 21 is opposite to the radiator of the first antenna unit 30. The second radiator 21 is also used to couple with the first antenna unit 30 on the first body 10 when the electronic device 1000 is folded, that is, the second radiator 21 acts as a parasitic branch of the first antenna unit 30 on the first body 10 when the electronic device 1000 is folded, so that the second radiator 21 can reduce the absorption of electromagnetic waves radiated by the first resonance mode by the finger, and can also act as a parasitic branch of the first antenna unit 30 on the first body 10 when the electronic device 1000 is folded, thereby improving the radiation performance of the first antenna unit 30 when folded.

[0153] The present application does not make any specific limitation on the first antenna unit 30 , and the structure of the first antenna unit 30 is specifically described below with reference to the accompanying drawings.

[0154] In an alternative embodiment, see Fig.18The first antenna unit 30 includes a third radiator 31 and a second signal source 32. The third radiator 31 includes a third ground terminal F, a second feeding point G and a third free terminal H which are arranged in sequence. The third ground terminal F is electrically connected to the reference ground. The third free terminal H is insulated and disconnected from other conductive structures.

[0155] See also Fig.18 , the second feeding point G is electrically connected to the second signal source 32.

[0156] The third radiator 31 is disposed at a position of the first sub-side 323a close to the rotation axis. In the folded state, the third radiator 31 and the second radiator 21 are opposite and coupled when the electronic device 1000 is folded. Moreover, the direction of the third ground end F pointing to the third free end H is opposite to the direction of the second ground end D pointing to the second free end E.

[0157] See also Fig.19 In the folded state, the orthographic projection of the third free end H in the thickness direction of the electronic device 1000 is located on the second radiator 21, and the orthographic projection of the second free end E in the thickness direction of the foldable electronic device is located on the third radiator 31.

[0158] For further information, see Fig.19 The orthographic projection of the third free end H in the thickness direction of the electronic device 1000 is located between the second free end E and the second ground end D, and the orthographic projection of the second free end E in the thickness direction of the foldable electronic device is located between the third ground end F and the third free end H.

[0159] Optionally, the relative length between the second radiator 21 and the third radiator 31 is close to half the length of the second radiator 21. Further, the relative length between the second radiator 21 and the third radiator 31 is (1 / 2-1) times the length of the second radiator 21.

[0160] The second signal source 32 is used to excite the third radiator 31 and the second radiator 21 to form a resonance mode when the electronic device 1000 is folded. The frequency bands supported by the resonance mode include but are not limited to LB band, MHB band, UHB band, Wi-Fi 2.4G band, Wi-Fi 5G band, GPS band, etc. This embodiment takes the MHB band as an example.

[0161] The third radiator 31 and the second signal source 32 form an IFA antenna, and the electrical length between the third ground terminal F and the third free terminal H is close to 1 / 4 wavelength of the MHB frequency band. When the electronic device 1000 is in the unfolded state, the second signal source 32 excites the third ground terminal F to the third free terminal H to form a 1 / 4 wavelength mode supporting the MHB frequency band.

[0162] Specifically, when the electronic device 1000 is in the folded state, the second signal source 32 excites the third radiator 31 and the second radiator 21 to form a dual resonance supporting the MHB frequency band. The resonance mode on the third radiator 31 is the main radiation mode, and the resonance mode on the second radiator 21 is to improve the efficiency of the main radiation mode of the third radiator 31.

[0163] For further optional implementations, see Fig. 20 , the first antenna unit 30 further includes a fourth radiator 41. The fourth radiator 41 includes a fourth ground terminal J and a fourth free terminal K. A first coupling gap is formed between the fourth free terminal K and the third free terminal H. The fourth radiator 41 is disposed on the first sub-side 323a. The fourth radiator 41 and the third radiator 31 form a mouth-to-mouth antenna.

[0164] See also Fig.21 , the fourth radiator 41 is opposite to the second radiator 21 when the electronic device 1000 is folded, that is, when the electronic device 1000 is folded, a portion of the second radiator 21 is opposite to the third radiator 31, and another portion is opposite to the fourth radiator 41. The second signal source 32 is used to excite the second radiator 21, the third radiator 31 and the fourth radiator 41 to form a resonant mode when the electronic device 1000 is folded.

[0165] See also Fig. 20 When the electronic device 1000 is in the unfolded state, the second signal source 32 excites the third radiator 31 and the fourth radiator 41 to form a dual resonance supporting the MHB frequency band. The resonance mode on the third radiator 31 is the main radiation mode, and the resonance mode on the fourth radiator 41 is to improve the efficiency of the main radiation mode of the third radiator 31.

[0166] See also Fig.21 In the folded state, the second radiator 21 and the fourth radiator 41 are parasitic branches of the third radiator 31, and the reverse currents on the second radiator 21 and the fourth radiator 41 can offset each other, so as to reduce the influence of the reverse current generated by the second radiator 21 and the fourth radiator 41 on the radiation energy of the third radiator 31, thereby improving the radiation efficiency of the third radiator 31.

[0167] Generally, after the electronic device 1000 is folded, the contribution of the longitudinal current from the reference floor to the radiation efficiency is greatly reduced due to the halving of the reference floor, and the antenna efficiency is greatly reduced; then the absorption of electromagnetic waves by the hand, the frequency deviation caused by the hand covering the free end, and other problems cause the performance of the electronic device 1000 to be greatly reduced after folding. The present application reduces the absorption of electromagnetic waves by the hand by designing the sinking part 114, and subsequently avoids frequency deviation by designing the position of the free end. The second radiating section 112 is designed to be located in the holding area Z1 for palm holding or the holding area Z1 for thumb holding in the commonly used handheld scene to form a dielectric loading effect, so as to improve the radiation efficiency of the low-frequency antenna of the electronic device 1000 after folding, so as to meet the anti-folding + anti-handholding performance of the low-frequency antenna; the second radiator 21 is designed to form a parasitic radiator of the third radiator 31 after folding, so as to further improve the performance of the medium and high frequency antenna after folding, and ensure that the medium and high frequency antenna of the electronic device 1000 has good performance after folding.

[0168] In the following, in conjunction with the accompanying drawings, the third radiation section 113, the second radiation section 112 and the second radiator 21 are arranged on the second sub-side 323b of the foldable electronic device, and the first radiator 11 operates in the LB frequency band. The second radiator 21 is used to improve the MHB performance of the first antenna unit 30 in the folded state. There is a gap between the second radiator 21 and the second radiation section 112. The first radiator 11 and the first signal source 12 form an LB IFA antenna. The first signal source 12 is returned to the ground through the sinking part 114 via the first grounding terminal C. The first grounding terminal C is located on the left side of the second radiator 21, that is, placed on the inner side of the second radiator 21. At the same time, the end of the extension part 115 is connected to the sinking part 114, which can avoid forming a mode of the first grounding terminal C-sinking part 114-extension part 115 to the gap. This mode will affect the folded medium and high frequency antenna; in addition, the resonant current will form two current paths, the sinking part 114 plays a shunt role, the current amplitude on the extension part 115 is shunted, the lower layer current path on the sinking part 114 is resistant to hand grip, and the upper layer current radiation on the extension part 115 is weakened, and is absorbed less by the fingers as a whole, thereby reducing the absorption of electromagnetic waves by fingers in the second holding scenario, reducing the hand-holding influence of the electronic device 1000 in the right-hand holding scenario, ensuring the right-hand holding efficiency, and achieving the anti-hand grip performance of the electronic device 1000.

[0169] The present application does not specifically limit the position of the second ground terminal D. Optionally, the second ground terminal D can be arranged adjacent to the first ground terminal C, so that more sinking parts 114 are arranged on the inner side of the second radiator 21. The present application does not specifically limit the length of the sinking part 114. Optionally, the position where the sinking part 114 is connected to the second radiating section 112 can be close to the first feeding point B, that is, the first feeding point B to the first ground terminal C can all be set as the sinking part 114. Optionally, the positions of the two ends of the extension part 115 are determined by the positions of one end of the sinking part 114 and the second free end E of the second radiator 21.

[0170] In this embodiment, the first free end A is located in the open zone Z3, and the first free end A is sufficiently far away from the human hand, so the first free end A cannot be grasped by the hand, reducing the possibility of a dead break caused by hand grasping; the first grounding terminal C is arranged on the sinking portion 114. Since the sinking portion 114 is located on the inner side of the second radiator 21, the human hand cannot directly grasp the high current ground return position (ie, the first grounding terminal C), further reducing the influence of hand grasping; the left hand holds the second radiating section 112 (high current area) near the first feeding point B to achieve dielectric loading to improve performance.

[0171] At this time, when the first radiator 11 is working, the current path is mainly: from the first ground end C through the parallel circuit of the sinking portion 114 and the extending portion 115 , through the second radiating section 112 to the first free end A of the IFA antenna in a quarter wavelength mode.

[0172] Furthermore, the low-frequency sub-band supported by the first radiator 11 can be switched by a switch circuit, wherein the switch circuit can be provided in the matching circuit M, or can be electrically connected between the first free end A and the first feeding point B. The switch circuit is used to change the electrical length of the first radiator 11, thereby switching the low-frequency sub-band supported by the first radiator 11.

[0173] See also Fig. 22 , Fig. 22 yes Fig.15 The S parameters of the antenna assembly 100 when the switch circuit is switched are provided. Curve a is the S parameter of the antenna assembly 100 when it is switched to B28. Curve b is the S parameter of the antenna assembly 100 when it is switched to B5. Curve c is the S parameter of the antenna assembly 100 when it is switched to B8. As can be seen from the figure, the antenna assembly 100 can be switched between the B28 frequency band, the B5 frequency band, and the B8 frequency band through the switch circuit. Furthermore, by designing the impedance of the switch switching, switching between 0.7GHz-1GHz can be achieved.

[0174] See also Fig.23 , Fig.23 yes Fig.15The provided antenna assembly 100 provides radiation efficiency and total curves when the switch circuit is switched. Curve a1 is the radiation efficiency of the antenna assembly 100 when it is switched to B5. Curve b1 is the radiation efficiency of the antenna assembly 100 when it is switched to B8. Curve c1 is the radiation efficiency of the antenna assembly 100 when it is switched to B28. Curve a2 is the total efficiency of the antenna assembly 100 when it is switched to B5. Curve b2 is the total efficiency of the antenna assembly 100 when it is switched to B8. Curve c2 is the total efficiency of the antenna assembly 100 when it is switched to B28. As can be seen from the figure, the antenna assembly 100 has good efficiency when it is switched to the B28 band, the B5 band, and the B8 band through the switch circuit.

[0175] See also Fig.24 , Fig.24 yes Fig.15 The provided antenna assembly 100 provides S parameters and efficiency curves in the folded + free space, folded + left-hand holding, and folded + right-hand holding scenarios when operating in the B28 frequency band.

[0176] Curve a1 is the S parameter of the antenna assembly 100 in folded + free space; curve b1 is the S parameter of the antenna assembly 100 in folded + left hand holding; curve c1 is the S parameter of the antenna assembly 100 in folded + right hand holding.

[0177] Curve a2 is the radiation efficiency of the antenna assembly 100 in folded + free space; curve b2 is the radiation efficiency of the antenna assembly 100 in folded + left hand holding; curve c2 is the radiation efficiency of the antenna assembly 100 in folded + right hand holding.

[0178] Curve a3 is the total efficiency of the antenna assembly 100 in folded state + free space; curve b3 is the total efficiency of the antenna assembly 100 in folded state + left hand holding; curve c3 is the total efficiency of the antenna assembly 100 in folded state + right hand holding.

[0179] Curves a1, b1, and c1 illustrate that the antenna assembly 100 can operate in the B28 frequency band in the folding + free space, folding + left-hand holding, and folding + right-hand holding scenarios, and basically no frequency deviation occurs in the left-hand holding and right-hand holding scenarios. This is because in this embodiment, the first free end A is located in the open zone Z3.

[0180] Curves a2 and b2 illustrate that the efficiency curve of the antenna assembly 100 in the folding + left-hand holding scenario moves toward low frequency compared to the efficiency curve in the folding + free space scenario, and the radiation efficiency of the antenna assembly 100 rises to a certain height and remains flat, indicating that after the B28 frequency band, the first radiator 11 still has a suitable radiation length and still has a certain radiation capability. This is because the hand contacts the high current segment of the first radiator 11, which increases the dielectric constant of the electromagnetic waves radiated by the first radiator 11, while the physical length of the first radiator 11 remains unchanged. According to the wavelength shortening effect, the efficiency peak moves to a lower level. The increase in the dielectric constant brought by the above-mentioned hand increases the efficiency, which is called dielectric loading. Dielectric loading realizes the early peak of radiation efficiency and widens the bandwidth, and the efficiency is improved by 4dB.

[0181] In the folding + right-hand holding scenario, the sinking portion 114 is used to keep the strong current area away from the fingers to reduce finger absorption, and the first free end A is arranged in the open area Z3 to be away from the fingers to avoid the fingers holding the gap. At this time, there is almost no frequency deviation and the efficiency is basically not reduced.

[0182] It can be seen from curves a2 and b2 that in the frequency band below 0.9 GHz, the antenna assembly 100 has relatively good efficiency in the folded + left-hand holding scenario.

[0183] Please refer to Table 1-2, which is a comparison of the total efficiency of the antenna assembly 100 provided in this embodiment in the B28 frequency band of folding + free space, folding + left hand holding, and folding + right hand holding. It can be seen that compared with the antenna assembly 100 without the sinking part 114 in Table 1-1, the antenna assembly 100 provided with the sinking part 114 in this embodiment not only has improved efficiency in the folding + free space scenario, but also has significantly improved efficiency in the folding + left hand holding in this embodiment compared to the efficiency in the folding + free space, and the antenna assembly 100 provided with the sinking part 114 has improved efficiency in the folding + right hand holding scenario compared to the antenna assembly 100 without the sinking part 114 in the folding + right hand holding scenario. The antenna assembly 100 provided in the embodiment of the present application has improved efficiency in the B28 frequency band of folding + free space, folding + left hand holding, and folding + right hand holding.

[0184] Table 1-2

[0185]

[0186] The embodiment of the present application can reduce frequency deviation and improve efficiency by avoiding the hand holding area by placing the first free end A and the first grounding end C for returning large current to ground. In addition, the hand holds the second radiating section 112 between the first free end A and the first grounding end C to form dielectric loading to improve efficiency.

[0187] The above embodiment is an implementation method in which the rotating shaft faces upward when folded. Fig.25 , Fig.25 yes Fig.15 The S-parameters and efficiency curves provided are for the folding hinge facing downward and supporting the B28 frequency band.

[0188] Curve a1 is the S parameter of the antenna assembly 100 in folded + free space; curve b1 is the S parameter of the antenna assembly 100 in folded + left hand holding; curve c1 is the S parameter of the antenna assembly 100 in folded + right hand holding.

[0189] Curve a2 is the radiation efficiency of the antenna assembly 100 in folded + free space; curve b2 is the radiation efficiency of the antenna assembly 100 in folded + left hand holding; curve c2 is the radiation efficiency of the antenna assembly 100 in folded + right hand holding.

[0190] Curve a3 is the total efficiency of the antenna assembly 100 in folded state + free space; curve b3 is the total efficiency of the antenna assembly 100 in folded state + left hand holding; curve c3 is the total efficiency of the antenna assembly 100 in folded state + right hand holding.

[0191] It can be seen from curve b1 and curve c1 that in the hand-holding scenario with the folding axis facing downward, the bandwidth of the left hand holding and the right hand holding will be expanded and the bandwidth is close.

[0192] Please refer to Table 1-3, which is a comparison of the total efficiency of the antenna assembly 100 provided in this embodiment with the folding axis facing downward in the B28 frequency band in folding + free space, folding + left hand holding, and folding + right hand holding. It can be seen that compared with the performance in the hand-holding scenario with the folding axis facing upward, the efficiency of the hand-holding scenario with the folding axis facing downward is more balanced and the difference is smaller, and because the second radiation segment 112 is located in the holding area Z1 for holding with the right thumb in the second holding scenario, the thumb contacts a larger area of ​​the second radiation segment 112, and the dielectric loading effect of the thumb is greater than the absorption effect, so the radiation efficiency of the right hand is improved.

[0193] Table 1-3

[0194]

[0195] In other implementations, the embodiment of the present application may also include an implementation without the second radiator 21 .

[0196] See also Fig.26 Based on the aforementioned embodiment in which the third radiation segment 113 is provided with a sinking portion 114 , the antenna assembly 100 further includes a fifth radiator 51 .

[0197] See also Fig.26, the fifth radiator 51 is located on the side of the first radiating section 111 away from the second radiating section 112. The fifth radiator 51 is coupled to the first radiator 11. The first signal source 12 is also used to excite the fifth radiator 51 to form a second resonant mode supporting a second frequency band. The first resonant mode and the second resonant mode form a double-wave resonance. The center frequency of the second frequency band is less than the center frequency of the first frequency band.

[0198] For details, please refer to Fig.26 The fifth radiator 51 includes a fifth free end L and a fifth ground end N. A second coupling gap is formed between the fifth ground end N and the first free end A. The fifth free end L is located on a side of the fifth ground end N away from the first free end A.

[0199] In the embodiment of the present application, the first radiator 11 and the fifth radiator 51 form an EH mode antenna.

[0200] See also Fig. 27 , Fig. 27 : is a resonant current distribution diagram of the second resonant mode in the antenna assembly 100 provided in an embodiment of the present application. The second resonant mode resonates between the fifth ground terminal N and the fifth free terminal L. The second resonant mode is a 1 / 4 wavelength mode of the second frequency band.

[0201] See also Fig.28 , Fig.28 : is a resonant current distribution diagram of the first resonant mode in the antenna assembly 100 provided in an embodiment of the present application. The first resonant mode resonates between the first ground end C and the first free end A. The first resonant mode is a 1 / 4 wavelength mode of the first frequency band.

[0202] By designing the electrical length between the fifth ground end N and the fifth free end L to be greater than the electrical length of the first radiator 11, the resonant frequency of the second resonant mode is smaller than the resonant frequency of the first resonant mode, and the difference between the resonant frequency of the second resonant mode and the resonant frequency of the first resonant mode is less than 1 GHz. The second resonant mode forms an efficiency convex hull on the high-frequency side of the second frequency band, and the first frequency band is located on the high-frequency side of the second frequency band. In this way, the second resonant mode improves the efficiency of the first frequency band and increases the efficiency bandwidth.

[0203] Optionally, the second frequency band and the first frequency band are both low frequencies. The fifth radiator 51 is used to improve the radiation efficiency and efficiency bandwidth of the antenna assembly 100 at low frequencies.

[0204] In an optional implementation, the physical length of the fifth radiator 51 is greater than the physical length of the first radiator 11 , so that the electrical length between the fifth ground end N and the fifth free end L is greater than the electrical length of the first radiator 11 .

[0205] In another optional implementation, the physical length of the fifth radiator 51 is smaller than the physical length of the first radiator 11 .

[0206] See also Fig.26 The antenna assembly 100 further includes an inductor element L0. One end of the inductor element L0 is electrically connected to the fifth ground terminal N, and the other end of the inductor element L0 is grounded. The inductor element L0 is used to increase the electrical length of the fifth radiator 51, so that when the physical length of the fifth radiator 51 is smaller than the physical length of the first radiator 11, the electrical length of the fifth radiator 51 is greater than the electrical length of the first radiator 11, thereby shortening the total length of the first radiator 11 and the fifth radiator 51.

[0207] Optionally, the inductor element L0 includes an inductor, wherein the inductor element L0 is a large inductor, for example, greater than or equal to 20 nH.

[0208] See also Fig.29 and Fig.30 The electronic device 1000 is a foldable electronic device. The electronic device 1000 includes a first body 10 and a second body 20 that can be folded relative to each other.

[0209] The antenna assembly 100 is disposed on the second body 20. Specifically, the third radiation section 113 and the second radiation section 112 of the first radiator 11 are disposed on the second sub-side 323b, and the third radiation section 113 is disposed on the bottom side 322. The fifth radiator 51 is disposed on the bottom side 322.

[0210] See also Fig.29 and Fig.30 The first body 10 includes a second antenna unit 40 supporting the MHB frequency band. Further, the second antenna unit 40 is arranged on the top edge 321.

[0211] The fifth radiator 51 is also used to couple with the radiator of the second antenna unit 40 on the first body 10 when the electronic device 1000 is folded.

[0212] The second antenna unit 40 is an IFA antenna or a port-to-port antenna, and the specific structure of the second antenna unit 40 can refer to the first antenna unit 30. The coupling mode, position distribution, and resonance mode between the second antenna unit 40 and the fifth radiator 51 can refer to the coupling mode, position distribution, and resonance mode between the first antenna unit 30 and the second radiator 21.

[0213] See also Fig.29 and Fig.30The antenna assembly 100 further includes a capacitor C0. One end of the capacitor C0 is electrically connected to the fifth ground terminal N, and the other end of the capacitor C0 is grounded. The capacitor C0 includes but is not limited to a small capacitor, for example, less than 2pF.

[0214] The capacitor C0 and the inductor L0 form a parallel circuit. The inductor L0 is used to conduct the first frequency band and the second frequency band and block the MHB frequency band. The capacitor C0 is used to conduct the MHB frequency band and block the first frequency band and the second frequency band.

[0215] In the expanded state, the first signal source 12 excites the first radiator 11 and the fifth radiator 51 to form dual resonance supporting the first frequency band and the second frequency band, wherein the resonant current on the fifth radiator 51 mainly goes to the ground through the inductor element L0, and the capacitor element C0 is equivalent to an open circuit for the resonant current of the first frequency band and the second frequency band.

[0216] In the folded state, the fifth radiator 51 serves as a parasitic branch of the second antenna unit 40. The resonant current supporting the MHB band generated under the excitation of the second antenna unit 40 mainly flows to the ground through the capacitor element C0, and the inductor element L0 is equivalent to a short circuit for the MHB band.

[0217] With the above implementation, in the unfolded state, the fifth radiator 51 supports the LB frequency band current, and in the folded state, the fifth radiator 51 supports the MHB frequency band, and there is no interference between them.

[0218] In another alternative embodiment, see Fig.31 The antenna assembly 100 further includes a first switch unit K1. One end of the first switch unit K1 is electrically connected to the fifth ground terminal N, and the other end of the first switch unit K1 can be selectively electrically connected to one end of the inductor element L0 or to the ground.

[0219] The first switch unit K1 is used to switch to ground when the electronic device 1000 is folded, and to switch to electrically connect to the inductor element L0 when the electronic device 1000 is unfolded. The inductor element L0 is a large inductor, for example, greater than or equal to 20nH.

[0220] In this embodiment, the first switch unit K1 is switched to ground when the electronic device 1000 is folded, and is switched to electrically connect to the inductor element L0 when the electronic device 1000 is in the unfolded state, so that the fifth radiator 51 supports the LB band current in the unfolded state and the fifth radiator 51 supports the MHB band in the folded state, and there is no interference between them.

[0221] The present application does not impose any specific limitation on the number of the above-mentioned LB antennas and MHB antennas. Optionally, the number of LB antennas and MHB antennas may be multiple to achieve intelligent switching.

[0222] The embodiment of the present application can add a fifth radiator 51 as an MHB parasitic branch on the basis of the LB antenna that is anti-folding + anti-hand-holding, so as to simultaneously improve the performance of the MHB band and the LB band; by increasing the switching unit and the large grounded inductor, or setting a parallel circuit of a large grounded inductor and a small grounded capacitor, the LB performance can be improved, and the performance of folding + free space / folding + left-hand holding / folding + right-hand holding in the LB band can be improved by 0.5-1dB.

[0223] Based on the aforementioned embodiment in which the third radiation section 113 is provided with the sinking portion 114, please refer to Fig.32 , the antenna assembly 100 further includes a fifth radiator 51. The fifth radiator 51 is located on a side of the first radiating section 111 away from the second radiating section 112. The fifth radiator 51 is coupled to the first radiator 11. The first signal source 12 is also used to excite the fifth radiator 51 to form a second resonant mode supporting a second frequency band. The first resonant mode and the second resonant mode form a double-wave resonance. The center frequency of the second frequency band is less than the center frequency of the first frequency band.

[0224] The present embodiment is different from the first embodiment in that a third coupling gap is formed between the fifth free end L and the first free end A. The fifth ground end N is located at a side of the fifth free end L away from the first free end A.

[0225] In the embodiment of the present application, the first radiator 11 and the fifth radiator 51 form an EE mode antenna.

[0226] The electrical length of the fifth radiator 51 is smaller than the electrical length of the first radiator 11, so that the resonant frequency of the second resonant mode is greater than the resonant frequency of the first resonant mode, and the difference between the resonant frequency of the second resonant mode and the resonant frequency of the first resonant mode is less than 1 GHz. The second resonant mode forms an efficiency convex hull on the low-frequency side of the second frequency band, and the first frequency band is located on the low-frequency side of the second frequency band. In this way, the second resonant mode improves the efficiency of the first frequency band and increases the efficiency bandwidth.

[0227] A portion of the fifth radiator 51 is disposed on the bottom edge 322 , and another portion of the fifth radiator 51 is disposed on the second side edge 324 .

[0228] See also Fig.33 , Fig.33 yes Fig.32A resonant current distribution diagram of a first resonant mode in the provided antenna assembly 100. The first resonant mode also forms a second resonant current on the fifth radiator 51. Specifically, the first resonant mode includes a main resonant current of a 1 / 4 wavelength mode operating on the first radiator 11, and also includes a sub-resonant current formed on the fifth radiator 51, wherein the direction of the second resonant current (sub-resonant current) is the same as the direction of the first resonant current (main resonant current) on the first radiator 11.

[0229] See also Fig.34 , Fig.34 yes Fig.32 A resonant current distribution diagram of a second resonant mode in the provided antenna assembly 100. The second resonant mode also forms a third resonant current on the first radiator 11. Specifically, the second resonant mode includes a main resonant current of a 1 / 4 wavelength mode operating on the fifth radiator 51, and also includes a sub-resonant current formed on the first radiator 11. The resonant current (main resonant current) of the second resonant mode on the fifth radiator 51 is opposite in direction to the third resonant current (sub-resonant current).

[0230] In short, the first signal source 12 excites the first radiator 11 and the fifth radiator 51 to jointly generate a resonant current of the first resonant mode, wherein the current of the first resonant mode on the first radiator 11 and the fifth radiator 51 is a unidirectional current, and the resonant current of the first resonant mode forms a current loop with the floor current on the reference floor, and the first resonant mode is also called a radiation mode. The radiation mode is a mode that depends on the participation of the reference floor. At the same time, the first signal source 12 also excites the first radiator 11 and the fifth radiator 51 to generate a resonant current of the second resonant mode, and the current of the second resonant mode on the first radiator 11 and the fifth radiator 51 is a reverse current, and the second resonant mode is also called a balanced mode, which is relatively a mode that does not depend on the participation of the reference floor.

[0231] When the frequency band supported by the balanced mode is located on the high-frequency side of the frequency band supported by the radiation mode, and the frequency band supported by the balanced mode is close to the frequency band supported by the radiation mode, the balanced mode can produce an efficiency enhancement effect (from the efficiency curve, the balanced mode can form an efficiency convex hull on the high-frequency side of the frequency band where the radiation mode is located) and thus improve the in-band efficiency of the radiation mode, that is, improve the in-band efficiency of the first frequency band.

[0232] The embodiment of the present application is based on the anti-folding + anti-hand-holding LB antenna. By setting a fifth radiator 51, the fifth radiator 51 and the LB antenna form a mouth-to-mouth antenna in EE mode, thereby improving the performance of the LB antenna, and the LB performance can be improved by 1-2d.

[0233] See also Figure 4, the sinking portion 114 is disposed in the first radiation section 111. The end of the sinking portion 114 away from the second radiation section 112 is the first free end A. In other words, the first free end A and the vicinity thereof are the sinking portion 114, which is away from the position of the frame 320 held by the human body, thereby reducing the absorption of the horizontal electric field at the first free end A by the hand and reducing the frequency deviation.

[0234] The resonance mode of the antenna assembly 100 in this embodiment is the same as the resonance mode of the first resonance mode in the embodiment, and will not be described again.

[0235] Optional, see Figure 4 , the frame 320 also includes an open area Z3 arranged adjacent to the holding area Z1. The open area Z3 is not held when the electronic device 1000 is in a holding state. The first free end A of the first radiating segment 111 is arranged in the open area Z3 of the frame 320. The open area Z3 is located at the bottom edge 322. The distance between the open area Z3 and the first side edge 323 may be greater than 10 mm, and the distance between the open area Z3 and the second side edge 324 may be greater than 10 mm.

[0236] For optional reference, see Figure 4 The first radiation section 111 may also be disposed on the first side edge 323 , and further disposed at the overlap zone Z2 of the first side edge 323 in the third holding scenario. The second radiation section 112 is disposed at the holding zone Z1 of the first side edge 323 in the first holding scenario. The third radiation section 113 is disposed at the bottom edge 322 .

[0237] See also Fig.35 A portion of the second radiator 21 is disposed outside the sinking portion 114, and the second radiator 21 can serve as outer protection for the sinking portion 114. The second radiator 21 can also serve as a parasitic branch of the first radiator 11 to improve the efficiency of the LB band and increase the efficiency bandwidth.

[0238] In addition, the second radiator 21 can also serve as a parasitic branch of the first antenna unit 30 of the electronic device 1000 when it is folded. For details, please refer to the above related description.

[0239] See also Fig.36 The first signal source 12 is used to excite the first radiator 11 and the second radiator 21 to form a third resonance mode supporting a third frequency band.

[0240] See also Fig.36 The third resonance mode forms a fourth resonance current between the first feeding point B and the first free end A, and forms a fifth resonance current between the second ground end D and the second free end E.

[0241] The fifth resonant current is in the opposite direction to the fourth resonant current. The intensity of the fifth resonant current is greater than the intensity of the fourth resonant current. The fifth resonant current makes the main radiation contribution to the third resonant mode. The working mode of the fourth resonant current is the 1 / 4 wavelength mode of the third frequency band. The working mode of the fifth resonant current is the 1 / 4 wavelength mode of the third frequency band.

[0242] At the same time, the third resonance mode forms a distributed current between the first ground terminal C and the first feeding point B. The distributed current is a current mode of approximately 1 / 2 wavelength, a portion of the distributed current flows from the vicinity of the midpoint between the first feeding point B and the first ground terminal C to the first ground terminal C, and another portion of the distributed current flows from the vicinity of the midpoint between the first feeding point B and the first ground terminal C to the first feeding point B.

[0243] For further information, see Fig.37 , the first signal source 12 is also used to excite the first radiator 11 to form a fourth resonance mode supporting a fourth frequency band. The fourth resonance mode forms a sixth resonance current between the first ground terminal C and the first free end A. The fourth resonance mode is a 3 / 4 wavelength mode of the fourth frequency band. The sixth resonance current includes a 1 / 4 wavelength mode current flowing from the vicinity of the midpoint between the first feeding point B and the first ground terminal C to the first ground point, and a 1 / 2 wavelength mode current flowing from the vicinity of the midpoint between the first feeding point B and the first ground terminal C to the first free end A. While the sixth resonance current is formed, there is a distributed current flowing from the second ground terminal D to the second free end E.

[0244] The center frequency of the fourth frequency band is greater than the center frequency of the third frequency band, and the center frequency of the fourth frequency band is less than 1 GHz from the center frequency of the third frequency band. The third frequency band and the fourth frequency band form a continuous frequency band covering Wi-Fi 2.4 GHz. The third resonance mode and the fourth resonance mode support dual-wave resonance of Wi-Fi 2.4 GHz to improve the radiation efficiency of the Wi-Fi 2.4 GHz frequency band and increase the bandwidth.

[0245] See also Fig.37, the first radiator 11 also includes a connection point P. The antenna assembly 100 also includes a switch switching circuit T1. The switch switching circuit T1 is electrically connected to the connection point P. The switch switching circuit T1 is used to switch the sub-band of the first frequency band. The connection point P is the current strong point position of the fourth resonance mode, that is, the electric wall position, so that when the switch switching circuit T1 switches the sub-band of the first frequency band, it will not affect the Wi-Fi 2.4GHz frequency band. Further, the current strong point position of the fourth resonance mode is, for example, near the first feeding point B. Further, the connection point P is the first feeding point B, so that the first matching circuit M and the switch switching circuit T1 can be integrated into one circuit, and only one spring clip needs to be set, which can reduce one spring clip compared to the implementation method of setting two spring clips.

[0246] At the same time, since the main mode of the third resonance mode is located on the second radiator 21, that is, the electrical length of the second radiator 21 determines the size of the third frequency band, the switch circuit T1 is set at the first feeding point B, and the size of the third resonance mode and the third frequency band will not be affected when the switch circuit T1 is switched.

[0247] When the switch circuit T1 is switched, the third frequency band and the fourth frequency band keep covering the Wi-Fi 2.4 GHz frequency band. That is, the antenna assembly 100 provided in this embodiment can keep the Wi-Fi 2.4 GHz frequency band resident when switching the sub-band of the first frequency band.

[0248] Furthermore, the switch circuit T1 is an impedance adjustable circuit, or an antenna switch circuit.

[0249] Optionally, the switch switching circuit T1 includes an antenna switch and / or an adjustable capacitor.

[0250] In the first embodiment of the switch circuit T1, please refer to Fig.38 The switch switching circuit T1 further includes a second switch unit and a plurality of first switch branches. One end of each of the plurality of first switch branches is electrically connected to one end of the second switch unit, and the other end of the second switch unit is electrically connected to the connection point P. That is, the second switch unit includes but is not limited to a transistor, a field effect transistor, etc. The other ends of each of the plurality of first switch branches are grounded.

[0251] The impedance value of each first switching branch is different. For example, multiple first switching branches are multiple capacitors with different capacitance values. Or, multiple first switching branches are multiple inductors with different inductance values. Or, multiple first switching branches include multiple capacitors with different capacitance values, and multiple inductors with different inductance values. By adjusting the second switch unit to be electrically connected to different devices, the equivalent electrical length of the first switching branch electrically connected to the first radiator 11 is adjusted, thereby switching the sub-band in the supported target frequency band.

[0252] In a second embodiment of the switch switching circuit T1, the switch switching circuit T1 includes an adjustable capacitor. One end of the adjustable capacitor is electrically connected to the connection point P, and the other end is grounded. The size of the adjustable capacitor is adjustable and is used to switch the sub-band in the supported target frequency band. The adjustable capacitor is a capacitor with an adjustable capacitance value. In this way, by adjusting the capacitance value of the capacitor, the impedance value of the switch switching circuit T1 is adjustable, thereby adjusting the effective electrical length of the switch switching circuit T1, further adjusting the effective electrical length of the first radiator 11, and then switching the sub-band in the supported target frequency band.

[0253] Of course, the switch circuit T1 may also be a combination of the first implementation and the second implementation described above, for example, the first switching branch includes the adjustable capacitor.

[0254] The electronic device 1000 provided in this embodiment may be a bar-type or foldable electronic device.

[0255] The following is a comparison between the antenna provided in this embodiment with the first free end A disposed on the sinking portion 114 and the antenna with the first free end A disposed on the frame 320 .

[0256] See also Fig.10 , Fig.10 It is an antenna with a first free end A disposed on the frame 320 (without the sinking portion 114 ), and the first signal source 12 generates the LB+Wi-Fi 2.4 GHz frequency band.

[0257] See also Fig.10 The working mode supporting the B28 frequency band formed by the antenna whose first free end A is arranged on the frame 320 is a 1 / 4 wavelength mode from the first ground end C to the first free end A.

[0258] See also Fig.38 The working mode 1 supporting the Wi-Fi 2.4 GHz frequency band formed by the antenna with the first free end A arranged on the frame 320 is a 3 / 4 wavelength mode working between the first ground end C and the first free end A, and a 1 / 4 wavelength mode from the second free end E to the second ground end D.

[0259] See also Fig.39 , the working mode 2 supporting the Wi-Fi 2.4GHz band formed by the antenna with the first free end A disposed on the frame 320 is a 3 / 4 wavelength mode working between the first ground end C and the first free end A, and a 1 / 4 wavelength mode working from the second free end E to the second ground end D. Among them, the working mode 1 of the Wi-Fi 2.4GHz band and the working mode 2 of the Wi-Fi 2.4GHz band have the same current direction on the first radiator 11, and the working mode 1 of the Wi-Fi 2.4GHz band and the working mode 2 of the Wi-Fi 2.4GHz band have opposite current directions on the second radiator 21. The above forms a dual-wave resonance of the Wi-Fi 2.4GHz band.

[0260] See also Fig.40 , Fig.40 It is the S parameter, radiation efficiency and total efficiency of the antenna with the first free end A set on the frame 320 working in the B28 frequency band and in free space. Among them, curve a is the S parameter of the antenna with the first free end A set on the frame 320 working in the B28 frequency band. Curve b is the radiation efficiency of the antenna with the first free end A set on the frame 320 working in the B28 frequency band. Curve c is the total efficiency of the antenna with the first free end A set on the frame 320 working in the B28 frequency band.

[0261] See also Fig.41 , Fig.41 It is the S parameter, radiation efficiency and total efficiency of the antenna with the first free end A set on the frame 320 working in the B28 frequency band in free space, left hand holding and right hand holding. Among them, curve a1 is the S parameter of the antenna with the first free end A set on the frame 320 working in the B28 frequency band in free space. Curve b1 is the S parameter of the antenna with the first free end A set on the frame 320 working in the B28 frequency band when held in the left hand. Curve c1 is the S parameter of the antenna with the first free end A set on the frame 320 working in the B28 frequency band when held in the right hand.

[0262] Among them, curve a2 is the radiation efficiency of the antenna with the first free end A set on the frame 320 working in the B28 frequency band in free space. Curve b2 is the radiation efficiency of the antenna with the first free end A set on the frame 320 working in the B28 frequency band when held in the left hand. Curve c2 is the radiation efficiency of the antenna with the first free end A set on the frame 320 working in the B28 frequency band when held in the right hand.

[0263] Curve a3 is the total efficiency of the antenna with the first free end A disposed on the frame 320 operating in the B28 frequency band in free space. Curve b3 is the total efficiency of the antenna with the first free end A disposed on the frame 320 operating in the B28 frequency band when held in the left hand. Curve c3 is the total efficiency of the antenna with the first free end A disposed on the frame 320 operating in the B28 frequency band when held in the right hand.

[0264] Please refer to Table 1-4, which shows the total efficiency of the antenna with the first free end A disposed on the frame 320 working in the B28 frequency band in free space, left hand holding and right hand holding. It can be seen that although the fingers hold the gap, the performance of the antenna in the left hand holding scenario is not much reduced compared to that in the free space due to the palm medium loading.

[0265] Table 1-4

[0266]

[0267] See also Fig.42 , Fig.42 yes Fig.36 The S parameters and efficiency of the antenna assembly 100 are provided. Curve a1 is the S parameter of the antenna assembly 100 operating in the B5 frequency band in free space. Curve b1 is the S parameter of the antenna assembly 100 operating in the B8 frequency band when held in the left hand. Curve c1 is the S parameter of the antenna assembly 100 operating in the B28 frequency band when held in the right hand.

[0268] Curve a2 is the radiation efficiency of the antenna assembly 100 operating in the B5 frequency band in free space. Curve b2 is the radiation efficiency of the antenna assembly 100 operating in the B8 frequency band when held in the left hand. Curve c2 is the radiation efficiency of the antenna assembly 100 operating in the B28 frequency band when held in the right hand.

[0269] Curve a3 is the total efficiency of the antenna assembly 100 operating in the B5 frequency band in free space. Curve b3 is the total efficiency of the antenna assembly 100 operating in the B8 frequency band when held in the left hand. Curve c3 is the total efficiency of the antenna assembly 100 operating in the B28 frequency band when held in the right hand.

[0270] As can be seen from the figure, when the LB band switches between the B28 band, the B8 band and the B28 band, WIFI2.4G remains resident.

[0271] In the left-hand holding scenario, since the palm medium loading still exists when the LB antenna is working, the first free end A is set on the sinking part 114 and away from the human hand, thus greatly reducing the impact of the finger holding the gap at the first free end A.

[0272] See also Fig.43 , Fig.43 yes Fig.36The provided antenna assembly 100 is compared with the S parameters of the antenna with the first free end A disposed on the frame 320 in the right-hand holding / left-hand holding scenario. Curve a is the S parameter of the antenna assembly 100 operating in the B28 frequency band in free space. Curve b is the S parameter of the antenna with the first free end A disposed on the frame 320 operating in the B28 frequency band in free space. Curve c is the S parameter of the antenna assembly 100 operating in the B28 frequency band when held in the left hand. Curve d is the S parameter of the antenna with the first free end A disposed on the frame 320 operating in the B28 frequency band when held in the left hand. Curve e is the S parameter of the antenna assembly 100 operating in the B28 frequency band when held in the right hand. Curve f is the S parameter of the antenna with the first free end A disposed on the frame 320 operating in the B28 frequency band when held in the right hand.

[0273] As can be seen from the figure, the antenna with the first free end A disposed on the frame 320 generates frequency deviation when held in the right hand. Fig.36 The provided antenna assembly 100 has substantially no frequency deviation when held in the right hand, which indicates that the embodiment of the present application reduces the frequency deviation by disposing the first free end A at the sinking portion 114 compared to being away from the human body.

[0274] See also Fig.44 , Fig.44 yes Fig.36 The provided antenna assembly 100 is compared with the radiation efficiency of the antenna with the first free end A disposed on the frame 320 in the right-hand holding / left-hand holding scenario. Curve a is the radiation efficiency of the antenna with the first free end A disposed on the sinking portion 114 operating in the B28 frequency band in free space. Curve b is the radiation efficiency of the antenna with the first free end A disposed on the frame 320 operating in the B28 frequency band in free space. Curve c is the radiation efficiency of the antenna with the first free end A disposed on the sinking portion 114 operating in the B28 frequency band when held in the left hand. Curve d is the radiation efficiency of the antenna with the first free end A disposed on the frame 320 operating in the B28 frequency band when held in the left hand. Curve e is the radiation efficiency of the antenna with the first free end A disposed on the sinking portion 114 operating in the B28 frequency band when held in the right hand. Curve f is the radiation efficiency of the antenna with the first free end A disposed on the frame 320 operating in the B28 frequency band when held in the right hand.

[0275] As can be seen from the figure, in the left-hand holding scenario and the right-hand holding scenario, Fig.36 The provided antenna assembly 100 reduces the absorption of electromagnetic wave signals by human hands by setting the first free end A at the sinking portion 114, which is farther away from the human body, thereby improving the efficiency compared to the antenna with the first free end A set on the frame 320.

[0276] See also Fig.45 , Fig.45 yes Fig.36The provided antenna assembly 100 is compared with the total efficiency of the antenna with the first free end A disposed on the frame 320 in the right-hand holding / left-hand holding scenario. Curve a is the total efficiency of the antenna with the first free end A disposed on the sinking portion 114 operating in the B28 frequency band in free space. Curve b is the total efficiency of the antenna with the first free end A disposed on the frame 320 operating in the B28 frequency band in free space. Curve c is the total efficiency of the antenna with the first free end A disposed on the sinking portion 114 operating in the B28 frequency band when held in the left hand. Curve d is the total efficiency of the antenna with the first free end A disposed on the frame 320 operating in the B28 frequency band when held in the left hand. Curve e is the total efficiency of the antenna with the first free end A disposed on the sinking portion 114 operating in the B28 frequency band when held in the right hand. Curve f is the total efficiency of the antenna with the first free end A disposed on the frame 320 operating in the B28 frequency band when held in the right hand.

[0277] As can be seen from the figure, in the left-hand holding scenario and the right-hand holding scenario, Fig.36 The provided antenna assembly 100 sets the first free end A on the sinking portion 114, which is farther away from the human body, thereby reducing the absorption of electromagnetic wave signals by the human hand, thereby improving the efficiency compared to the antenna with the first free end A set on the frame 320. The efficiency is significantly improved in the left-hand holding scenario.

[0278] Please refer to Table 1-5, which is Fig.36 The total efficiency of the provided antenna assembly 100 and the antenna whose first free end A is arranged on the frame 320 are compared in free space, right-hand holding, and left-hand holding scenarios in the B28 frequency band. Fig.36 The total efficiency of the provided antenna assembly 100 in free space is comparable to the total efficiency of the antenna in free space with the first free end A disposed on the frame 320. Fig.36 The antenna assembly 100 provided by the invention improves the situation that the fingers are stuck and broken in the right-hand holding scene by setting the first free end A at the sinking part 114. Since the adverse effect of the fingers being stuck on the first free end A is reduced, while the medium loading effect of the palm is retained, the basic performance is not reduced in the left-hand holding scene. Fig.36 The total efficiency of the provided antenna assembly 100 in the right-handed hand-held scenario is improved by nearly 2 dB compared to the total efficiency of the antenna with the first free end A disposed on the frame 320 in the right-handed hand-held scenario.

[0279] Table 1-5

[0280]

[0281] The embodiments of the present application have been shown and described above. It can be understood that the above embodiments are exemplary and cannot be understood as limitations on the present application. Ordinary technicians in the field can change, modify, replace and modify the above embodiments within the scope of the present application, and these improvements and modifications are also regarded as the scope of protection of the present application.

Claims

1. An electronic device, characterized in that: include: a frame, the frame comprising a gripping area and an overlapping area, the gripping area being gripped by a palm when the electronic device is in a first gripping scenario and being gripped by a thumb when the electronic device is in a second gripping scenario, and the overlapping area being overlapped by fingers when the electronic device is in a third gripping scenario; and An antenna assembly, comprising a first radiator and a first signal source, wherein the first radiator comprises a first radiating section, a second radiating section and a third radiating section which are interconnected as a whole and arranged in sequence, an end of the first radiating section away from the second radiating section is a first free end, an end of the third radiating section away from the second radiating section is a first grounding end, and the second radiating section comprises a first feeding point; The first signal source is electrically connected to the first feeding point, and is used to excite the first radiator to form a first resonant mode supporting a first frequency band; the first radiating segment or the third radiating segment includes a sinking portion, and the sinking portion is arranged on the inner side of the overlapping area of ​​the frame and is spaced apart from the overlapping area of ​​the frame; the first resonant current of the first resonant mode is distributed at least in the sinking portion and the second radiating segment, at least a part of the second radiating segment is the holding area of ​​the frame, and the second radiating segment is used to form a medium loading for the first resonant mode when being held.

2. The electronic device according to claim 1, wherein: The first radiating segment or the third radiating segment also includes an extension portion arranged side by side with the sinking portion, the extension portion is a part of the overlapping area of ​​the frame, one end of the extension portion is connected to the second radiating segment, and the other end of the extension portion is bent and connected to the sinking portion, and the extension portion and the sinking portion surround to form a hollow area.

3. The electronic device according to claim 2, characterized in that: The first resonance mode is a 1 / 4 wavelength mode resonating from the first ground end to the first free end, and a first resonance current of the first resonance mode is also distributed in the extension portion.

4. The electronic device according to claim 1, wherein: The sinking portion is disposed in the third radiation section, and one end of the sinking portion away from the second radiation section is the first grounding end.

5. The electronic device according to claim 4, characterized in that: The antenna assembly also includes a second radiator, which includes a second ground end and a second free end. The second free end is spaced apart from the first radiator, and the second ground end is located on a side of the second free end away from the first radiator. The second radiator is part of the frame, and at least part of the sunken portion is located on the inner side of the second radiator and spaced apart from the second radiator.

6. The electronic device according to claim 5, characterized in that: The electronic device is a foldable electronic device, comprising a first body and a second body which are foldable relative to each other, the antenna assembly is arranged on the second body, and the second radiator is also used to couple with the first antenna unit on the first body when the electronic device is folded.

7. The electronic device according to claim 6, characterized in that: The first antenna unit includes a third radiator and a second signal source, the third radiator includes a third ground end, a second feeding point and a third free end arranged in sequence, the second feeding point is electrically connected to the second signal source, the third radiator and the second radiator are opposite and coupled when the electronic device is folded, the direction in which the third ground end points to the third free end is opposite to the direction in which the second ground end points to the second free end, and the second signal source is used to excite the third radiator and the second radiator to form a resonant mode when the electronic device is folded.

8. The electronic device according to claim 7, characterized in that: The first antenna unit also includes a fourth radiator, which includes a fourth ground end and a fourth free end. A first coupling gap is formed between the fourth free end and the third free end. The fourth radiator and the second radiator are opposite to each other when the electronic device is folded. The second signal source is used to excite the second radiator, the third radiator and the fourth radiator to form a resonant mode when the electronic device is folded.

9. The electronic device according to claim 1, wherein: The frame further includes an open area disposed adjacent to the holding area, the open area is not held when the electronic device is in a holding state, and the first free end of the first radiation segment is disposed in the open area of ​​the frame; The frame includes a top edge, a first side edge, a bottom edge and a second side edge connected in sequence, the holding area is located on the second side edge close to the bottom edge, the overlapping area is located on the second side edge on a side of the holding area away from the bottom edge, and the open area is located on the bottom edge close to the second side edge; or, the holding area is located on the first side edge close to the bottom edge, the overlapping area is located on the second side edge on a side of the holding area away from the bottom edge, and the open area is located on the bottom edge close to the first side edge.

10. The electronic device according to any one of claims 1 to 9, characterized in that: The antenna assembly also includes a fifth radiator, which is located on a side of the first radiating segment away from the second radiating segment. The fifth radiator is coupled to the first radiator. The first signal source is also used to excite the fifth radiator to form a second resonant mode that supports a second frequency band. The first resonant mode and the second resonant mode form a double-wave resonance, and the center frequency of the second frequency band is less than the center frequency of the first frequency band.

11. The electronic device according to claim 10, characterized in that: The fifth radiator includes a fifth free end and a fifth ground end, a second coupling gap is formed between the fifth ground end and the first free end, the fifth free end is located on the side of the fifth ground end away from the first free end, the second resonance mode resonates between the fifth ground end and the fifth free end, and the second resonance mode is a 1 / 4 wavelength mode of the second frequency band.

12. The electronic device according to claim 11, characterized in that: The length of the fifth radiator is smaller than the length of the first radiator; The antenna assembly further includes an inductor element, one end of which is electrically connected to the fifth ground terminal, and the other end of which is grounded, and the inductor element is used to make the electrical length of the fifth radiator greater than the electrical length of the first radiator.

13. The electronic device according to claim 12, characterized in that: The electronic device is a foldable electronic device, comprising a first body and a second body that can be folded relative to each other, the first body comprising a second antenna unit supporting the MHB frequency band, the antenna assembly being arranged on the second body, and the fifth radiator being further used to couple with the second antenna unit on the first body when the electronic device is folded; The antenna assembly also includes a capacitor element, one end of which is electrically connected to the fifth ground end, and the other end of which is grounded. The capacitor element is used to conduct the MHB frequency band and block the first frequency band and the second frequency band. The inductor element is used to conduct the first frequency band, the second frequency band and block the MHB frequency band.

14. The electronic device according to claim 12, characterized in that: The antenna assembly further comprises a switch unit, one end of which is electrically connected to the fifth ground terminal, and the other end of which is selectively electrically connected to one end of the inductor element or to the ground; The switch unit is used to switch to ground when the electronic device is in a folded state, and to switch to electrically connect to the inductor element when the electronic device is in an unfolded state.

15. The electronic device according to claim 10, characterized in that: A third coupling gap is formed between the fifth free end and the first free end, and the fifth grounding end is located on a side of the fifth free end away from the first free end; the electrical length of the fifth radiator is smaller than the electrical length of the first radiator; The first resonance mode also forms a second resonance current on the fifth radiator, and the direction of the second resonance current is the same as the direction of the first resonance current on the first radiator; The second resonance mode also forms a third resonance current on the first radiator, and the resonance current of the second resonance mode on the fifth radiator is opposite in direction to the third resonance current.

16. The electronic device according to claim 4, characterized in that: The sinking portion is located in the first radiation section, and an end of the sinking portion away from the second radiation section is the first free end; The first signal source is also used to excite the first radiator and the second radiator to form a third resonance mode supporting a third frequency band, the third resonance mode forms a fourth resonance current between the first feeding point and the first free end, and forms a fifth resonance current between the second ground end and the second free end, the fifth resonance current is opposite to the fourth resonance current in direction, the intensity of the fifth resonance current is greater than the intensity of the fourth resonance current, the operating mode of the fourth resonance current is a 1 / 4 wavelength mode of the third frequency band, and the operating mode of the fifth resonance current is a 1 / 4 wavelength mode of the third frequency band.

17. The electronic device according to claim 16, characterized in that: The first signal source is also used to excite the first radiator to form a fourth resonance mode supporting a fourth frequency band, the fourth resonance mode forms a sixth resonance current between the first ground end and the first free end, and the fourth resonance mode is a 3 / 4 wavelength mode of the fourth frequency band.

18. The electronic device according to claim 17, characterized in that: The third frequency band and the fourth frequency band form a continuous frequency band covering Wi-Fi 2.4 GHz, and the third resonance mode and the fourth resonance mode are double-wave resonance.

19. The electronic device according to claim 17, wherein: The first radiator also includes a connection point, and the antenna assembly also includes a switch switching circuit, which is electrically connected to the connection point, and the switch switching circuit is used to switch the sub-band of the first frequency band; the connection point is the current strong point position of the fourth resonant mode, and the third frequency band and the fourth frequency band cover Wi-Fi 2.4GHz when the switch switching circuit is switched.

20. The electronic device according to any one of claims 1 to 9 and 11 to 19, characterized in that: The first frequency band is less than or equal to 0.9 GHz.

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