ANTENNA STRUCTURE AND ELECTRONIC DEVICE HAVING AN ANTENNA STRUCTURE

Abstract

The present invention provides an antenna structure, comprising a frame body, a first feed part, and a first connecting part, wherein the frame body is made at least partially of a metallic material, the frame body comprises at least a first part and a second part, the second part being connected to one end of the first part, the length of the second part being greater than the length of the first part, a first slot is provided in the first part, a second slot is provided in the second part, a portion of the frame body between the first slot and the second slot forms a first radiating part, the first feed part is arranged in the first radiating part and located in the first part of the frame body, the first feed part is electrically connected to a first feed to supply a current signal to the first radiating part.The first connection part is arranged in the first radiation section and located in the second part of the frame body. The antenna structure can efficiently improve the radiation performance of the low band (LB). The present invention further provides an electronic device having the antenna structure.

Description

ANTENNA STRUCTURE AND ELECTRONIC DEVICE HAVING AN ANTENNA STRUCTURE FIELD OF INVENTION The present invention relates to an antenna structure and an electronic device having the antenna structure. BACKGROUND Currently, to enhance the perceived quality of electronic devices, such as mobile phones and personal digital assistants, metal is increasingly being applied to the industrial design (ID) of these devices, for example, in a metal casing. In industrial design that utilizes a metal casing, the design of the metal casing in an antenna becomes a key aspect of the antenna design. In the prior art, low-band (LB) performance is primarily achieved through the use of a side longitudinal component, such as an inverted-F antenna (IFA) or an active longitudinal antenna. However, as large displays, such as curved screens, become more prevalent, the side metal frames of mobile phones become thinner. Consequently, as curved screens approach their extremes and the side frame and surrounding area become thinner, the performance of an antenna using the side frame as the primary radiating antenna drops drastically and cannot meet the low-band (LB) performance requirement. BRIEF DESCRIPTION In view of this, it is necessary to provide an antenna structure that can effectively improve low band (LB) radiation performance, and an electronic device that has the antenna structure. According to the first aspect, this application provides an antenna structure for an electronic device. The antenna structure includes a frame body, a first feed part, and a first connecting part, where the frame body is made at least partially of a metallic material, the frame body includes at least a first part and a second part, the second part is connected to one end of the first part, the length of the second part is greater than the length of the first part, a first slot is provided in the first part, a second slot is provided in the second part, a portion of the frame body between the first slot and the second slot forms a first radiating part, the first feed part is arranged in the first radiating part and located in the first part of the frame body,The first power supply part is electrically connected to a first power supply to provide a current signal to the first radiation part, and the first connection part is arranged in the first radiation part and located in the second part of the frame body. It can be learned that the antenna structure provided in the first aspect uses a low-band (LB) bottom feed and, unlike an IFA mode, has miniaturization characteristics and relies primarily on transverse components, making it less affected by curved side shields. Furthermore, the side slots can help enhance a lateral longitudinal component, thereby improving the efficiency of the low-band (LB) feed. With regard to the first aspect, in some configurations, the antenna structure also includes a first tuning unit, where one end of the first tuning unit is electrically connected to the first feed section, and the other end is grounded. The first tuning unit includes a first tuning branch, a second tuning branch, and at least one first switching unit. The first tuning branch includes a capacitor or an inductor, and the second tuning branch includes a capacitor or an inductor. The first tuning unit is configured to perform port matching and tuning and frequency adjustment in the first radiating section. With regard to the first aspect, in some configurations, the antenna structure also includes a second tuning unit, where one end of the second tuning unit is electrically connected to the first connecting part, the other end is grounded. The second tuning unit includes a third tuning branch, a fourth tuning branch, and at least one second switching unit. The third tuning branch includes a capacitor or an inductor, and the fourth tuning branch includes a capacitor or an inductor. The first connecting part slightly adjusts a frequency and a longitudinal component of the first radiating part using the second tuning unit. With regard to the first aspect, in some designs, a third slot is also provided in the first part. The third and first slots are spaced apart, with the first slot closer to the second than the third. A portion of the frame between the first and third slots forms a parasitic segment of the first radiating section, allowing the antenna structure to generate additional resonance. Furthermore, tuning is performed on this parasitic segment of the first radiating section, shifting the additional resonance to an effective band within the first radiating section and improving its radiation efficiency. αζοοηη / ζζηζ / Ε / γίΛΐ With reference to the first aspect, in some modalities, the frame body also includes a third part, where the third part and the second part face each other and are connected to the other end of the first part; furthermore, a third slot is provided in the first part; the third slot and the first slot are arranged at an interval, the first slot being closer to the second slot than the third slot; a ground point is arranged in the third part; a part of the frame body between the ground point and the third slot forms a second radiating part; the antenna structure also includes a second feed part; the second feed part is arranged in the second radiating part and located in the first part of the frame body, and the second feed part is electrically connected to a second feed to supply a current signal to the second radiating part. With regard to the first aspect, in some configurations, a portion of the frame between the first slot and the first connection part forms a parasitic segment of the second radiation segment. This parasitic segment is designed to disperse the current distribution within the second radiation segment, effectively reducing the specific absorption rate of the second radiation segment. With regard to the first aspect, in some configurations, the antenna structure also includes a second connection section. This second connection section is located on the first radiating section and within the second part of the frame, at a distance from the second slot that is greater than the distance from the first connection section to the second slot. The second connection section is grounded using the second tuning unit. Frequency tuning is performed on the parasitic branch of the second radiating section using both the first and second tuning units. With reference to the first aspect, in some modalities, the antenna structure further includes a third connecting part and a third tuning unit, where the third connecting part is arranged in the second radiating part and located in the first part of the frame body, the third connecting part is closer to the third than the second feed part, one end of the third tuning unit is electrically connected to the third connecting part and the second feed part, the other end is grounded, the third tuning unit includes a fifth tuning branch, a sixth tuning branch and at least one third switching unit, the fifth tuning branch includes a capacitor or an inductor, and the sixth tuning branch includes a capacitor or an inductor.The third tuning unit is configured to perform frequency tuning in the second radiation part. With reference to the first aspect, in some modalities, the body of the frame is a metal frame of the electronic device, i.e., the antenna structure is a metal frame antenna, in this case, the first part is a lower metal frame of the electronic device, and the second part is a side metal frame of the electronic device. Regarding the first aspect, in some configurations, the antenna structure is not limited to a metal frame antenna and can alternatively be a mode decoration antenna (MDA) or another type of antenna. For example, when the antenna structure is an MDA, a metal component in the chassis of an electronic device is used as a radiator to implement a radiation function. The chassis of the electronic device is made of a material such as plastic, and the metal component is integrated with the chassis through insert molding. According to a second aspect, this application further provides an electronic device, which includes the antenna structure provided in the first aspect. With regard to the second aspect, in some configurations, the electronic device also includes a backplate and a display unit. The backplate is located on one edge of the housing, and the display unit is located on the side of the housing, away from the backplate. The backplate is made of metal or another conductive material. Alternatively, it can be made of an insulating material such as glass or plastic. In other words, the antenna structure can be adapted to the electronic device with a backplate made of different materials. Furthermore, the antenna structure can be adapted to the electronic device with a large display, such as a curved screen, and a thinner (narrower) metal housing. According to a third aspect, one modality of this application further provides an electronic device. The electronic device includes an antenna structure, where the antenna structure includes a frame body, the frame body is made at least partially of a metallic material, the frame body includes at least a first part, a second part, and a third part, the second part and the third part face each other and are connected to two ends of the first part, a length of the second part and a length of the third part are each greater than the length of the first part, a first slot, a second slot, and a third slot are provided in the frame body, the first slot and the third slot are provided in the first part at intervals, the second slot is provided in the second part, the first slot is closer to the second slot than the third slot.A portion of the frame body between the first and second slots forms a first radiation portion; a ground point is arranged in the third portion; a portion of the frame body between the ground point and the third slot forms a second radiation portion; a first power supply portion is arranged in the first radiation portion; the first power supply portion is located in the first part of the frame body to supply a current signal to the first radiation portion; a second power supply portion is arranged in the second radiation portion; and the second power supply portion is located in the first part of the frame body to supply a current signal to the second radiation portion. With regard to the third aspect, in some configurations, the antenna structure also includes a first tuning unit, where one end of the first tuning unit is electrically connected to the first feed section, and the other end is grounded. The first tuning unit includes a first tuning branch, a second tuning branch, and at least one first switching unit. The first tuning branch includes a capacitor or an inductor, and the second tuning branch includes a capacitor or an inductor. The first tuning unit is configured to perform port matching and tuning and frequency adjustment in the first radiating section. With reference to the third aspect, in some modalities, the antenna structure further includes a first connection part, a second connection part, and a second tuning unit, where the first connection part and the second connection part are arranged in the first radiating part at an interval and located in the second part of the frame body, the distance from the second connection part to the second slot is greater than the distance from the first connection part to the second slot, one end of the second tuning unit is electrically connected to the first connection part and the second connection part, the other end is grounded, the second tuning unit includes a third tuning branch, a fourth tuning branch, and at least a second switching unit, the third tuning branch includes a capacitor or an inductor.and the fourth tuning branch includes a capacitor or an inductor. The first connecting part slightly adjusts a frequency and a longitudinal component of the first radiation part using the second tuning unit. With regard to the third aspect, in some configurations, a portion of the frame between the first and third slots forms a parasitic segment of the first radiating element, allowing the antenna structure to generate an additional resonance. Furthermore, tuning is performed on this parasitic segment of the first radiating element, shifting the additional resonance to an effective band within the first radiating element and improving its radiation efficiency. With regard to the third aspect, in some configurations, a portion of the frame between the first slot and the first connection section forms a parasitic segment of the second radiation section. This parasitic segment is designed to disperse the current distribution within the second radiation section, effectively reducing its specific absorption rate. Furthermore, frequency tuning is performed on this parasitic segment using the first and second tuning units. With reference to the third aspect, in some modalities, the antenna structure further includes a third connecting part and a third tuning unit, where the third connecting part is arranged in the second radiating part and located in the first part of the frame body, the third connecting part is closer to the third part than the second feed part, one end of the third tuning unit is electrically connected to the third connecting part and the second feed part, the other end is grounded, the third tuning unit includes a fifth tuning branch, a sixth tuning branch and at least one third switching unit, the fifth tuning branch includes a capacitor or an inductor, and the sixth tuning branch includes a capacitor or an inductor.The third tuning unit is configured to perform frequency tuning in the second radiation part. With regard to the third aspect, in some models, the frame body is a metal frame of the electronic device; that is, the antenna structure is a metal frame antenna. In this case, the first part is a lower metal frame of the electronic device, and the second and third parts are side metal frames of the electronic device. With regard to the third aspect, in some configurations, the antenna structure is not limited to a metal frame antenna and can alternatively be a mode decoration antenna (MDA) or another type of antenna. For example, when the antenna structure is an MDA, a metal component in the chassis of an electronic device is used as a radiator to implement a radiation function. The chassis of the electronic device is made of a material such as plastic, and the metal component is integrated with the chassis through insert molding. It can be learned that the antenna structure provided in the third aspect can implement low-band (LB) radiation performance and low mid-to-high-band (MHB) SAR. That is, the antenna slot position and slot width are designed, and the armature body position and slot coupling current intensity are adjusted to affect a concentrated and dispersed degree of current distribution in the antenna armature body. The antenna structure provided in the third aspect increases the current distribution area in a mid-to-high-band (MHB) (e.g., by adjusting the electrical length of the second radiation portion) and also cooperates with a parasitic mid-to-high-band (MHB) armature body to shunt current, thus reducing SAR.Furthermore, for one slot (i.e., the second slot) provided in the side frame body, a low-band (LB) bottom feed is used. Unlike an IFA mode, this feed has miniaturization characteristics and relies primarily on transverse components, making it less affected by curved side shields. Additionally, the side slots can help improve the lateral longitudinal component. Moreover, joint tuning of the switches can improve the efficiency of the low-band (LB) feed and also adjust for mid / high-band (MHB) parasitic resonance, thus ensuring mid / high-band (MHB) performance characteristics and low SAR, without requiring significant power reduction to control the SAR. BRIEF DESCRIPTION OF THE DRAWINGS Figure 1 is a schematic diagram of an antenna structure applied to an electronic device according to an embodiment of the present invention. Figure 2 is a schematic diagram of the electronic device shown in Figure 1 from another angle. Figure 3 is a circuit diagram of the antenna structure shown in Figure 1. Figure 4A and Figure 4C are schematic diagrams of the three existing antenna design solutions. Figure 5A to Figure 5C are schematic diagrams of the three different MHB design solutions. Figure 6 is a schematic structural diagram of a switch unit shown in Figure 3. Figure 7 is a graph of the S-parameter curve (dispersion parameter) and radiation efficiency of the antenna structure shown in Figure 1 operating in a low-band mode. Figure 8 is a graph of the S parameter curve (dispersion parameter) and system efficiency of the antenna structure shown in Figure 1 operating in a B5 LTE band. Figure 9 is a schematic current diagram of a resonance 1 of the antenna structure shown in Figure 8 operating in a B5 LTE band. Figure 10 is a schematic current diagram of a resonance 2 of the antenna structure shown in Figure 8 operating in a B5 LTE band. Figure 11 is a curve graph of the S parameter (dispersion parameter) of an antenna structure when a first connection part shown in Figure 3 is connected to a different overresistance (Ron); αζοοηη / ζζηζ / Ε / γίΛΐ Figure 12 is a graph of the radiation efficiency curve of an antenna structure when a first connection part shown in Figure 3 is connected to a different overresistance (Ron); Figure 13 is a curve graph of the S parameter (dispersion parameter) of an antenna structure when a second connection part shown in Figure 3 is connected to a different overresistance (Ron); Figure 14 is a graph of the radiation efficiency curve of an antenna structure when a second connecting part shown in Figure 3 is connected to a different ignition resistance (Ron); Figure 15 is a curve graph of the S parameter (dispersion parameter) and radiation efficiency of the antenna structure shown in Figure 1 operating in a B28 LTE band when a second slot is provided or a second slot is not provided on one side. Figure 16 is a curve graph of the S parameter (dispersion parameter) and radiation efficiency of the antenna structure shown in Figure 1 operating in a B5 LTE band when a second slot is provided or a second slot is not provided on one side. Figure 17 is a curve graph of the S parameter (dispersion parameter) and radiation efficiency of the antenna structure shown in Figure 1 operating in a B8 LTE band when a second slot is provided or a second slot is not provided on one side. Figure 18 is a curve graph of the S parameter (dispersion parameter) and radiation efficiency of the antenna structure operating in a B28 LTE band when a portion of a frame body between a first slot and a third slot in the antenna structure shown in Figure 3 serves as a parasitic piece. αζοοηη / ζζηζ / Ε / γίΛΐ Description of the reference symbols of the main components Antenna structure 100 Housing 11 Frame 111 Backplate 112 First part 115 Second part 116 Third part 117 First slot 120 Second slot 121 Third slot 122 First radiation part F1 Second radiation part F2 First feed part 12 Second feed part 13 First connection part 15 Second connection part 17 Third connection part 18 Ground point 19 First tuning unit SW1 Second tuning unit SW2 Third tuning unit SW3 Switch 61, 62, 63 Tuning branch L1, L2, L3 Electronic device 200 Display unit 201 First feed 202 Second feed 203 First electronic element 21 Second electronic element 22 Third electronic element 23 The present invention will be described in detail with reference to the accompanying drawings in the following specific ways. DESCRIPTION OF THE MODALITIES The following clearly describes the technical solutions in the modalities of the present QZQQÍin / 77P7 / E / YILI invention with reference to the accompanying drawings in the embodiments of the present invention. Apparently, the embodiments described are only some, but not all, of the embodiments of the present invention. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments of the present invention without creative effort will fall within the scope of protection of the present invention. It should be noted that when one element is electrically connected to another, as mentioned, the element may be directly on top of the other element, or there may be an element in between. When one element is considered to be electrically connected to another, it can be a contact connection, such as a cable connection, or a non-contact connection, such as a contactless coupling. Unless otherwise defined, all technical and scientific terms used herein have the same meanings as those normally understood by a person skilled in the art of the present invention. The terms used in the description of the present invention are for the description of particular embodiments only and are not intended to limit the present invention. The following describes in detail some embodiments of the present invention with reference to the accompanying drawings. The following embodiments and features of the embodiments may be combined, provided that no conflict arises. With reference to Figure 1 and Figure 2, an exemplary implementation of the present invention provides an antenna structure 100 (with reference to Figure 3). The antenna structure can be applied to an electronic device 200 such as a mobile phone, a tablet, or a personal digital assistant (PDA) and is configured to transmit and receive radio waves, to transmit and exchange radio signals. It may be understood that the electronic device 200 may use one or more of the following communication technologies: a Bluetooth (BT) communication technology, a global positioning system (GPS) communication technology, a wireless fidelity (Wi-Fi) communication technology, a global system for mobile communications (GSM) communication technology, a wideband code division multiple access (WCDMA) communication technology, a long term evolution (LTE) communication technology, a 5G communication technology, a SUB-6G communication technology, other future communication technologies, and the like. The electronic device 200 includes a housing 11 and a display unit 201. The housing 11 includes at least a frame 111 and a backplate 112. The frame 111 has a substantially ring-like structure and is made of metal or another conductive material. The backplate 112 is arranged on an edge of the frame 111. The backplate 112 may be made of metal or another conductive material. Alternatively, the backplate 112 may be made of an insulating material such as glass or plastic. It may be understood that, in this embodiment, an opening (not shown in the figure) is provided on one side of the frame 111 facing the backplate 112 and configured to accommodate the display unit 201. It may be understood that the display unit 201 is provided with a flat viewing surface, and that the flat viewing surface is exposed outside the opening. It may be understood that the display unit 201 can be combined with a touch sensor to form a touchscreen. The touch sensor may also be referred to as a touch panel or touch-sensitive panel. Also, referring to figure 3, the antenna structure 100 includes at least a frame body, a first feed part 12, a second feed part 13, a first connection part 15, a second connection part 17, and a third connection part 18. The frame body is made at least partially of a metallic material. In this embodiment, the frame body is frame 111 of the electronic device 200. Frame 111 includes at least a first part 115, a second part 116, and a third part 117. In this embodiment, the first part 115 is a lower end of the electronic device 200, i.e., the first part 115 is a lower metallic frame of the electronic device 200. The antenna structure 100 forms a lower antenna of the electronic device 200. The second part 116 and the third part 117 face each other, are arranged at two ends of the first part 115 respectively, and are preferably arranged vertically. In this embodiment, the length of the second part 116 or the length of the third part 117 is greater than the length of the first part 115.That is, both the second part 116 and the third part 117 are side metal frames of the electronic device 200. Furthermore, at least one slot is provided in frame 111. In this embodiment, three slots are provided in frame 111: a first slot 120, a second slot 121, and a third slot 122. The first slot 120 and the third slot 122 are provided in the first part 115 at intervals. The second slot 121 is provided in the second part 116. The first slot 120 is closer to the second part 116 than the third slot 122. The third slot 122 is closer to the third part 117 than the first slot 120. It can be understood that, in this mode, the antenna structure 100 also includes a ground point 19. A ground point 19 is arranged on the third part 117. In this mode, the first slot 120, the second slot 121, and the third slot 122 pass through and cut the frame 111. At least one slot and ground point 19 jointly mark at least two radiation portions in the frame 111. In this mode, the first slot 120, the second slot 121, the third slot 122, and ground point 19 jointly mark a first radiation portion F1 and a second radiation portion F2 in the frame 111. In this mode, a portion of the frame 111 between the first slot 120 and the second slot 121 forms the first radiation portion F1. A portion of the frame 111 between the third slot 122 and ground point 19 forms the second radiation portion F2. That is, the first part of radiation F1 is arranged in a lower right corner of the electronic device 200 and is made up of a part of the first part 115 and a part of the second part 116.The second radiation part F2 is arranged in a lower left corner of the electronic device 200 and is formed by a part of the first part 115 and a part of the third part 117. An electrical length of the first radiation part F1 is greater than an electrical length of the second radiation part F2. It can be understood that, in this mode, the first slot 120, the second slot 121 and the third slot 122 are filled with insulating material such as plastic, rubber, glass, wood or ceramic, but are not limited to them. It can be understood that, in this embodiment, the width of the first slot 120, the width of the second slot 121, and the width of the third slot 122 are all small, for example, they may vary from 0.5 millimeters (mm) to 2 mm. In a preferred solution, the width of the first slot 120, the width of the second slot 121, and the width of the third slot 122 may each be 0.8 mm, 1 mm, or 1.2 mm. It can be understood that, in this mode, the first power supply part 12 is located in the housing 11. The first power supply part 12 is arranged in the first radiation part F1 and is located in the first part 115. The first power supply part 12 can be electrically connected to a first power supply 202 using a dome, a micro strip, a strip, a coaxial cable or similar, to supply a current signal to the first radiation part F1. The second power supply part 13 is arranged in the housing 11. The second power supply part 13 is arranged in the second radiation part F2 and is located in the first part 115. The second power supply part 13 can be electrically connected to a second power supply 203 using a dome, a micro strip, a strip, a coaxial cable or similar, to supply a current signal to the second radiation part F2. It can be understood that, in this mode, the first feed part 12 and the second feed part 13 can be made of a material such as iron, copper sheet or a conductor in a laser direct structuring process (Laser Direct structuring, LDS). The first connection part 15 is arranged in the first radiation part F1 and is located in the second part 116. The second connection part 17 is arranged in the first radiation part F1 and is located in the second part 116. That is, in this mode, the first connection part 15 and the second connection part 17 are arranged in the second part 116 at an interval, and the distance from the first connection part 15 to the second slot 121 is less than the distance from the second connection part 17 to the second slot 121. That is, the first connection part 15 is closer to the second slot 121 than the second connection part 17. The third connection part 18 is arranged in the housing 11. In this mode, the third connection part 18 is arranged in the first part 115. The third connection part 18 is closer to the third part 117 than the second power supply part 13. It can be understood that, in this mode, an electrical length L (referring to FIG. 3) of the first radiation part F1 is adjusted so that the electrical length L is approximately half a wavelength corresponding to its resonant frequency. Therefore, when current is supplied to the first feed part 12, the first radiation part F1 can generate a resonance using a half-wave mode. In this case, a radiation mode of the antenna structure 100 is a longitudinal mode. Furthermore, when current is supplied to the first feed part 12, the first radiation part F1 can alternatively generate a resonance using a composite right / left-handed (CRLH) mode. In this case, a radiation mode of the antenna structure 100 is a transverse mode.In other words, when power is supplied to the first power supply section 12, the first radiation section F1 can generate a radiation signal in a first radiation band by using both CRLH mode and half-wave mode to initiate a first operating mode. In this mode, the first operating mode is a low-band (LB) mode. The frequency of the first radiation band includes, but is not limited to, bands such as LTE B28 / B5 / B8. The longitudinal mode can be understood to refer to a radiation mode in which the longitudinal side metal frame (e.g., Part 116, Part 2) acts as the primary radiator, radiating outwards. The transverse mode can refer to a radiation mode in which the transverse lower metal frame (e.g., Part 115, Part 1) acts as the primary radiator, radiating outwards. It can be understood that when current is supplied to the first feed part 12, the CRLH mode is used as the main resonant mode. This mode, unlike the inverted F antenna (IFA) mode, has miniaturization characteristics and is based primarily on transverse components, making it less affected by side radiators or curved shields. Furthermore, the antenna structure 100 with a slot (i.e., the second slot 121) provided on its side, for example, the second part 116, can help improve a longitudinal component of a side radiator, ensuring that the antenna structure 100 has relatively good LB radiation performance. When power is supplied to the second part of the power supply 13, the antenna structure 100 can generate a radiation signal in a second radiation band by using both CRLH mode and parasitic mode to initiate a second operating mode. The second operating mode is a mid / high band (MHB) mode. The frequency of the second radiation band includes, but is not limited to, bands such as LTE B1 / B3 / B4 / B7 / B38 / B39 / B40 / B41, WCDMA B1 / B2, and GSM 1800 / 1900. It can be understood that, with the development of information technologies, the public enjoys the convenience they provide and is also focused on the harmful effects of electromagnetic radiation from wireless communication terminals on the human body. Specific Absorption Rate (SAR) is an important indicator of a mobile phone and is also the aspect to which an antenna engineer pays particular attention during antenna design. Generally, the Total Radiated Power (TRP) of the electronic device is closely associated with the SAR. However, in actual antenna design, the radiation power of a mobile phone is reduced to control the SAR under normal conditions. For example, Figure 4A, Figure 4B, and Figure 4C are schematic diagrams of three existing antenna solutions.In all three antenna solutions, a SAR sensor is added to determine the scenario for obtaining different SAR values, and then the radiation power of a mobile phone is reduced to meet a SAR requirement. However, simply reducing the radiation power of a mobile terminal to control SAR impairs a product's radio performance, affects the user experience, and also reduces a product's competitiveness. In antenna structure 100, the second radiating part F2 uses two resonant modes, including a CRLH mode and a parasitic mode. The CRLH mode is located on one side of the second feed part 13. Therefore, the current distribution area of ​​the CRLH mode is increased (e.g., the electrical length of the second radiating part F2 is adjusted or increased). The parasitic mode of the second radiating part F2 extends through the first slot 120 and the third slot 122, and a portion of the frame 111 between the first slot 120 and the first connection part 15 forms a parasitic segment. This disperses the current distribution, allowing antenna structure 100 to operate in a mid / high band and exhibit a relatively low SAR without reducing its radiating power.That is, as shown in Figure 3, area 1 forms an MHB area of ​​antenna structure 100. That is, the second radiation portion F2 is primarily in CRLH mode, and the parasitic portion of the second radiation portion F2 passes through the first slot 120 and the third slot 122, so that a portion of the frame 111 between the first slot 120 and the first connection portion 15 forms a parasitic portion. Furthermore, in the figure, area 2 forms an LB area of ​​antenna structure 100. Figure 5A, Figure 5B, and Figure 5C are schematic diagrams of the three different MHB design solutions. Figure 5A uses long left-hand mode and far parasitic, Figure 5B uses short left-hand mode and far parasitic, and Figure 5C uses short left-hand mode and close parasitic. Long left-hand and short left-hand mean that the electrical length of the second radiation part F2 in Figure 5A is greater than the electrical length of the second radiation part F2 in Figure 5B and Figure 5C.Distant parasite and near parasite refer to a parasitic fragment further from the second radiation portion F2 (e.g., a portion of frame 111 between the first slot 120 and the first connection portion 15, with reference to Figure 5A and Figure 5B) and a parasitic fragment closer to the second radiation portion F2 (e.g., a portion of frame 111 between the first slot 120 and the third slot 122, with reference to Figure 5C), respectively. It has been clearly found through simulation of the SAR values ​​in the three solutions above that, in the solution in Figure 5A (i.e., the solution used in this report), a component tangent to a magnetic field (H-field) is more dispersed, resulting in a relatively low SAR value. It can be understood that, in this configuration, the antenna structure 100 also includes a first tuning unit SW1, a second tuning unit SW2, and a third tuning unit SW3. One end of the first tuning unit SW1 is electrically connected to the first feed section 12, and the other end is grounded. The first tuning unit SW1 is configured to perform port matching and tuning, as well as frequency adjustment, on the first radiating section F1. One end of the second tuning unit SW2 is electrically connected to the first connection part 15 and the second connection part 17. The other end of the second tuning unit SW2 is grounded. It can be understood that, in this mode, the second tuning unit SW2 forms a multi-switch; that is, the first connection part 15 and the second connection part 17 share the second tuning unit SW2. The first connection part 15 can be switched to different tuning branches using the second tuning unit SW2, thereby adjusting a frequency and longitudinal component. For example, the first connection part 15 can be switched or adjusted to a zero-ohm resistor or a 1 nanohenry (nH) / 2-nH inductor using the second tuning unit SW2, thus slightly adjusting a frequency and longitudinal component of the first radiation part F1. The second connection part 17 adjusts a parasitic resonance frequency of the second radiation part F2 using the second tuning unit SW2. One end of the third tuning unit SW3 is electrically connected to the second power supply part 13 and the third connection part 18, and the other end is grounded. The third tuning unit SW3 is configured to perform frequency tuning in CRLH mode of the second radiation part F2. Additionally, frequency tuning is performed in parasitic mode of the second radiation part F2 using the first tuning unit SW1. In a preferred solution, auxiliary tuning can also be performed in parasitic mode of the second radiation part F2 using the second tuning unit SW2, based on the first tuning unit SW1. That is, tuning is performed in CRLH mode of the second radiation part F2 primarily using the third tuning unit SW3.Tuning is performed in the parasitic mode of the second part of radiation F2 using the first tuning unit SW1 and the second tuning unit SW2. It can be understood that the tuning units described above, for example, the first tuning unit SW1, the second tuning unit SW2, and the third tuning unit SW3, may each be, but are not limited to, a combination of a plurality of single-pole single-throw (SPST) switches. For example, with reference to Figure 6, the tuning unit may include at least one switch unit, for example, three SPST switches: switch 61, switch 62, and switch 63. One end of each switch unit is grounded, and the other end may be connected to a corresponding tuning branch. For example, switch 61 is connected to tuning branch L1, switch 62 is connected to tuning branch L2, and switch 63 is connected to tuning branch L3.Each of the tuning branches L1, L2, and L3 can include either a capacitor or an inductor. The tuning units can selectively activate different tuning branches to implement frequency adjustment. Certainly, in other configurations, the tuning units, for example, the first tuning unit SW1, the second tuning unit SW2, and the third tuning unit SW3, may also include other types of switch units and are not limited to the SPST switches mentioned above. It can be understood that, in this mode, the antenna structure 100 cooperates with the joint tuning of the tuning units, for example, the first tuning unit SW1, the second tuning unit SW2, and the third tuning unit SW3, so that the free space (FS) can improve efficiency in low-band mode. Furthermore, parasitic resonance can be adjusted in mid / high-band mode, ensuring performance and low SAR characteristics in mid / high-band mode. It can be understood that FS efficiency refers to the efficiency of the antenna structure 100 in low band mode when the electronic device 200 is not in the hands of a user. Figure 7 is a graph of the S-parameter (dispersion parameter) and radiation efficiency curves of antenna structure 100 operating in a low-band mode. Curve S41 indicates the S11 values ​​of antenna structure 100 operating in LTE band B28. Curve S42 indicates the S11 values ​​of antenna structure 100 operating in LTE band B5. Curve S43 indicates the S11 values ​​of antenna structure 100 operating in LTE band B8. Curve S44 indicates the radiation efficiency of antenna structure 100 operating in LTE band B28. Curve S45 indicates the radiation efficiency of antenna structure 100 operating in LTE band B5. Curve S46 indicates the radiation efficiency of antenna structure 100 operating in LTE band B8. Curve S47 indicates the system efficiency of antenna structure 100 operating in LTE band B28.An S48 curve indicates the system efficiency of antenna structure 100 operating in the LTE B5 band. An S49 curve indicates the system efficiency of antenna structure 100 operating in the LTE B8 band. Figure 8 is a graph of the S-parameter (dispersion parameter) and system efficiency of antenna structure 100 operating in the LTE B5 band. Curve S51 indicates the S11 values ​​of antenna structure 100 operating in the LTE B5 band. Curve S52 indicates the system efficiency of antenna structure 100 operating in the LTE B5 band. Figure 9 is a schematic current diagram of a resonant 1 of antenna structure 100 operating in the LTE B5 band. Figure 10 is a schematic current diagram of a resonant 2 of antenna structure 100 operating in the LTE B5 band. It can be seen from Figures 8 and 9 that, since the first radiating part F1 is bottom-fed, resonant 1 radiates primarily in CRLH mode, i.e., transverse mode. Furthermore, at a side-grounding position of antenna structure 100, specifically at the positions of the first connection part 15 and the second connection part 17, the frame body (i.e., the first radiating part F1) forms a large current-area antenna, resulting in a maximum current density Jmax. Therefore, a parasitic resistance, including the second tuning unit SW2, significantly impacts the low-band efficiency of antenna structure 100.It can be learned from Figure 8 and Figure 10 that when the first radiation part F1 operates at resonance 2, resonance 2 radiates primarily using the half-wave mode, i.e., the longitudinal mode. Furthermore, the current is fed to the first feed part 12, flows through the first radiation part F1, and is then radiated from the first slot 120 and the second slot 121 at the two ends of the first radiation part F1. Figure 11 and Figure 12 each illustrate an effect of the resistance (Ron), generated by the first connecting part 15 connected to the second tuning unit SW2, on the antenna performance. Curve S81 indicates the S11 values ​​of antenna structure 100 when the turn-on resistance (Ron) is 2 ohms. Curve S82 indicates the S11 values ​​of antenna structure 100 when the turn-on resistance (Ron) is 1.5 ohms. Curve S83 indicates the S11 values ​​of antenna structure 100 when the turn-on resistance (Ron) is 1 ohm. Curve S84 indicates the S11 values ​​of antenna structure 100 when the turn-on resistance (Ron) is 0.5 ohms. Curve S85 indicates the S11 values ​​of antenna structure 100 when the turn-on resistance (Ron) is 0 ohms. An S91 curve indicates the radiation efficiency of the antenna structure 100 when the ignition resistance (Ron) is 2 ohm.An S92 curve indicates the radiation efficiency of antenna structure 100 when the turn-on resistance (Ron) is 1.5 ohms. An S93 curve indicates the radiation efficiency of antenna structure 100 when the turn-on resistance (Ron) is 1 ohm. An S94 curve indicates the radiation efficiency of antenna structure 100 when the turn-on resistance (Ron) is 0.5 ohms. An S95 curve indicates the radiation efficiency of antenna structure 100 when the turn-on resistance (Ron) is 0 ohms. It can be clearly seen from Figures 11 and 12 that when the turn-on resistance (Ron) is 2 ohms, the effect is approximately 1.6 dB. When the turn-on resistance (Ron) is 1 ohm, the effect is approximately 0.9 dB. That is, the effect of the resistance (Ron) of the first connection part 15 on the antenna's efficiency is relatively large. Therefore, in this configuration, for a low band (LB), the first connection part 15 can be designed to be directly grounded, for example, directly grounded by using a zero-ohm resistor separate from the resistance (Ron) of the second tuning unit SW2. Figure 13 and Figure 14 each illustrate an effect of the resistance (Ron), generated by the second connecting part 17 connected to the second tuning unit SW2, on the antenna's performance. Curve S101 indicates the S11 values ​​of antenna structure 100 when the turn-on resistance (Ron) is 2 ohms. Curve S102 indicates the S11 values ​​of antenna structure 100 when the turn-on resistance (Ron) is 1 ohm. Curve S103 indicates the S11 values ​​of antenna structure 100 when the turn-on resistance (Ron) is 0 ohms. Curve S111 indicates the radiation efficiency of antenna structure 100 when the turn-on resistance (Ron) is 2 ohms. Curve S112 indicates the radiation efficiency of antenna structure 100 when the turn-on resistance (Ron) is 1 ohm. αζοοηη / ζζηζ / Ε / γίΛΐ An S113 curve indicates the radiation efficiency of the antenna structure 100 when the ignition resistance (Ron) is 0 ohm. It can be clearly learned from Figures 13 and 14 that when the second tuning unit SW2 uses three single-pole single-throw (SPST) switches, the turn-on resistance (Ron) of the second tuning unit SW2 is 2 ohms, and the effect is approximately 0.4 dB. When the second tuning unit SW2 uses four SPST switches, the turn-on resistance (Ron) of the second tuning unit SW2 is 1 ohm, and the effect is approximately 0.2 dB. That is, the effect of the second connection part 17 on the antenna structure 100 is relatively small. Therefore, switches with a relatively small resistance (Ron), for example, 4SPST switches, can be selected to reduce the effect of the turn-on resistance (Ron) of the second connection part 17 on the antenna efficiency when the first tuning unit SW1 is used to perform port tuning in a low band.Figure 15 is a graph of the S-parameter (dispersion parameter) and radiation efficiency curves of antenna structure 100 operating in the LTE B28 band when a second slot 121 is provided on one side of the antenna structure 100, or when a second slot 121 is not provided on one side. Curve S121 indicates the S11 values ​​of the antenna structure 100 operating in the LTE B28 band when the second slot 121 is provided. Curve S122 indicates the radiation efficiency of the antenna structure 100 operating in the LTE B28 band when the second slot 121 is provided. Curve S123 indicates the system efficiency of the antenna structure 100 operating in the LTE B28 band when the second slot 121 is provided. Curve S124 indicates the S11 values ​​of the antenna structure 100 operating in the LTE B28 band when the second slot 121 is not provided.An S125 curve indicates the radiation efficiency of antenna structure 100 operating in the LTE B28 band when the second slot 121 is not provided. An S126 curve indicates the system efficiency of antenna structure 100 operating in the LTE B28 band when the second slot 121 is not provided. Figure 16 is a curve graph of the S parameter (dispersion parameter) and radiation efficiency of antenna structure 100 operating in a B5 LTE band when an antenna structure 100 is provided with a second slot 121 or a second slot 121 is not provided on one side. An S131 curve indicates the S11 values ​​of antenna structure 100 operating in a B5 LTE band when the second slot 121 is provided. An S132 curve indicates the radiation efficiency of antenna structure 100 operating in the B5 LTE band when the second slot 121 is provided. An S133 curve indicates the system efficiency of antenna structure 100 operating in the B5 LTE band when the second slot 121 is provided. An S134 curve indicates the S11 values ​​of antenna structure 100 operating in a B5 LTE band when the second slot 121 is not provided.An S135 curve indicates the radiation efficiency of antenna structure 100 operating in the LTE B5 band when the second slot 121 is not provided. An S136 curve indicates the system efficiency of antenna structure 100 operating in the LTE B5 band when the second slot 121 is not provided. Figure 17 is a graph of the S-parameter (dispersion parameter) and radiation efficiency curves of antenna structure 100 operating in the LTE B8 band when a second slot 121 is provided on one side of the antenna structure 100, or when a second slot 121 is not provided on one side. Curve S141 indicates the S11 values ​​of the antenna structure 100 operating in the LTE B8 band when the second slot 121 is provided. Curve S142 indicates the radiation efficiency of the antenna structure 100 operating in the LTE B8 band when the second slot 121 is provided. Curve S143 indicates the system efficiency of the antenna structure 100 operating in the LTE B8 band when the second slot 121 is provided. Curve S144 indicates the S11 values ​​of the antenna structure 100 operating in the LTE B8 band when the second slot 121 is not provided.An S145 curve indicates the radiation efficiency of antenna structure 100 operating in the LTE B8 band when the second slot 121 is not provided. An S146 curve indicates the system efficiency of antenna structure 100 operating in the LTE B8 band when the second slot 121 is not provided. It can clearly be learned from Figure 15 to Figure 17 that when antenna structure 100 is provided with the second slot 121, the low band (LB) performance of antenna structure 100 improves between 1 dB and 1.5 dB compared to an existing solution in which the slot is not provided, and relatively good FS performance is implemented. It should be understood that, referring again to Figure 3, in this embodiment, the electronic device 200 also includes at least one electronic element. In this embodiment, the electronic device 200 includes at least three electronic elements: a first electronic element 21, a second electronic element 22, and a third electronic element 23. The first electronic element 21, the second electronic element 22, and the third electronic element 23 are all arranged in the housing 11. In this configuration, the first electronic element 21 is a Universal Serial Bus (USB) interface module. The first electronic element 21 is located between the first slot 120 and the third slot 122. The second electronic element 22 is a sound cavity. The second electronic element 22 is located between the third slot 122 and the third part 117. The third electronic element 23 is a Subscriber Identity Module (SIM) cardholder module. The third electronic element 23 is located between the first power supply part 12 and the second part 116. It can be understood that, in other configurations, a portion of frame 111 between the first slot 120 and the third slot 122 in antenna structure 100 can alternatively form a parasitic piece F3 in a low-band mode. The parasitic piece F3 is separated from both the first radiation portion F1 and the second radiation portion F2, i.e., it is cantilevered. Figure 18 is a graph of the S-parameter (dispersion parameter) and radiation efficiency curves of antenna structure 100 operating in a B28 LTE band when tuning is performed on the parasitic piece F3 with or without tuning. Curve S151 indicates the S11 values ​​of antenna structure 100 operating in a B28 LTE band when tuning is not performed on the parasitic piece F3. Curve S152 indicates the radiation efficiency of antenna structure 100 operating in a B28 LTE band when tuning is not performed on the parasitic piece F3.An S153 curve indicates the S11 values ​​of antenna structure 100 operating in a B28 LTE band when no tuning is performed on the parasitic F3 piece. An S154 curve indicates the radiation efficiency of antenna structure 100 operating in a B28 LTE band when tuning is performed on the parasitic F3 piece. Clearly, when a part of the frame 111 between the first slot 120 and the third slot 122 in the antenna structure 100 forms the parasitic piece F3 in a low-band mode, the antenna structure 100 can generate an additional resonance 3. It can be learned from Figure 18 that when tuning is performed on the parasitic piece F3, the resonance 3 can be changed to an effective band of the first radiation part F1, and the radiation efficiency in the LTE B28 band is significantly improved. It can be understood that, in one mode, tuning can be performed on the parasitic segment F3 in a low-band mode using the first tuning unit SW1, i.e., by multiplexing the first tuning unit SW1. Certainly, in other modes, a corresponding switching unit can also be provided to perform tuning on the parasitic segment F3 in a low-band mode. It can be understood that, in this configuration, the second radiation part F2 is arranged on the same side as the second electronic element 22. Certainly, in other configurations, the position of the second radiation part F2 can be adjusted as needed. For example, the second radiation part F2 can be arranged on the same side as the third electronic element 23, while the first radiation part F1 is arranged on one side of the second electronic element 22. That is, the positions of the first radiation part F1 and the second radiation part F2 can be adjusted (for example, interchanged) as needed. It can be understood that, in this mode, the antenna structure 100 performs separate feeding using an independent low-band and mid / high-band feeding mode, i.e., using the first feed part 12 and the second feed part 13, and is provided with the first tuning unit SW1, the second tuning unit SW2, and the third tuning unit SW3. An on / off state of the first tuning unit SW1, an on / off state of the second tuning unit SW2, and an on / off state of the third tuning unit SW3 are controlled / adjusted, so that the total LB / MB / HB coverage is effectively implemented, and a low mid / high band (MHB) SAR characteristic and a relatively good low band (LB) radiation performance are also implemented. It can be understood that, as described above, in this embodiment, the frame body of antenna structure 100 is formed directly by the chassis 111 of electronic device 200; that is, the chassis (frame) of electronic device 200 is made of a metallic material, and antenna structure 100 is a metal-frame antenna. Certainly, in other embodiments, the antenna structure 100 is not limited to a metal-frame antenna and may alternatively be a mode decoration antenna (MDA) or another type of antenna. For example, when antenna structure 100 is an MDA, a metal member in the chassis of electronic device 200 is used as the frame body to implement a radiation function. The chassis of electronic device 200 is made of an insulating material such as plastic, and the metal member is integrated with the chassis through insert molding. In conclusion, as the curved full screens approach their end, the antenna structure 100 of the present invention can implement both low-band (LB) radiation performance and low mid- / high-band (MHB) SAR. Specifically, the antenna slot position and slot width are designed, and the frame body position and slot coupling current intensity are adjusted to achieve both a concentrated and dispersed degree of current distribution within the antenna frame body. The antenna structure 100 increases the current distribution area of ​​a mid- / high-band (MHB) CRLH mode (e.g., by adjusting the electrical length of the second radiation portion F2) and also cooperates with a mid- / high-band (MHB) parasitic frame body to shunt current, thereby reducing SAR.Furthermore, for one slot (i.e., the second slot 121) provided on the side of the frame body, a low-band (LB) bottom feed is used, and the CRLH mode is primarily used as the resonant mode. Unlike an IFA mode, the CRLH mode has the characteristics of miniaturization and that. The QZQQÍin / 77Ω7 / B / YILI is primarily based on transverse components, making it less affected by curved side shields. Furthermore, the side slots help improve the lateral longitudinal component. Additionally, joint tuning of the switches enhances the efficiency of the low-band (LB) FS and also adjusts for parasitic mid / high-band (MHB) resonance, ensuring low SAR and mid / high-band (MHB) performance characteristics, without requiring significant power reduction to control SAR. The foregoing implementations are intended solely to illustrate the technical solutions of the present invention, but do not constitute any limitation. Although the present invention is described in detail with reference to the foregoing exemplary implementations, a person skilled in the art should understand that equivalent modifications or replacements may be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention. A person skilled in the art may also make various changes to the design of the present invention without departing from the spirit of the present invention, provided that such changes do not deviate from the technical effects of the present invention. Such changes made in accordance with the spirit of the present invention shall fall within the scope of protection of the present invention.

Claims

1. An antenna structure for an electronic device, characterized in that the antenna structure comprises a frame body, a first feed part, and a first connecting part, wherein the frame body is made at least partially of a metallic material, the frame body comprises at least a first part and a second part, the second part being connected to one end of the first part, the length of the second part being greater than the length of the first part, a first slot is provided in the first part, a second slot is provided in the second part, a portion of the frame body between the first slot and the second slot forms a first radiating part, the first feed part is arranged in the first radiating part and located in the first part of the frame body,The first power supply part is electrically connected to a first power supply to provide a current signal to the first radiation part, and the first connection part is arranged in the first radiation part and located in the second part of the frame body.

2. The antenna structure according to claim 1, characterized in that the antenna structure comprises a first tuning unit, characterized in that one end of the first tuning unit is electrically connected to the first feed part, the other end of the first tuning unit is grounded, the first tuning unit comprises a first tuning branch, a second tuning branch and at least one first switch unit, the first tuning branch comprises a capacitor or an inductor, and the second tuning branch comprises a capacitor or an inductor.

3. The antenna structure according to claim 1 or 2, characterized in that the antenna structure further comprises a second tuning unit, wherein one end of the second tuning unit is electrically connected to the first connecting part, the other end is grounded, the second tuning unit comprises a third tuning branch, a fourth tuning branch and at least one second switching unit, the third tuning branch comprises a capacitor or an inductor, and the fourth tuning branch comprises a capacitor or an inductor.

4. The antenna structure according to any of claims 1 to 3, characterized in that a third slot is further provided in the first part, the third slot and the first slot are arranged at an interval, the first slot is closer to the second slot than the third slot, and a part of the frame body between the first slot and the third slot forms a parasitic piece of the first radiating part, to allow the antenna structure to generate additional resonance.

5. The antenna structure in accordance with claim 3.Characterized in that the frame body further comprises a third part, wherein the third part and the second part face each other and are connected to the other end of the first part, furthermore a third slot is provided in the first part, the third slot and the first slot are arranged at an interval, the first slot being closer to the second slot than the third slot, a ground point is arranged in the third part, a part of the frame body between the ground point and the third slot forms a second radiating part, the antenna structure further comprises a second feed part, the second feed part is arranged in the second radiating part and located in the first part of the frame body, and the second feed part is electrically connected to a second feed to supply a current signal to the second radiating part.

6. The antenna structure according to claim 5, characterized in that a part of the frame body between the first slot and the first connecting part forms a parasitic piece of the second radiating part, and the parasitic piece of the second radiating part is configured to disperse the current distribution in the second radiating part.

7. The antenna structure according to claim 5 or 6, characterized in that the antenna structure further comprises a second connecting part, wherein the second connecting part is arranged in the first radiating part and located in the second part of the frame body, at a distance from the second connecting part to the second slot that is greater than the distance from the first connecting part to the second slot, and the second connecting part is grounded using the second tuning unit.

8. The antenna structure according to any of claims 5 to 7, characterized in that the antenna structure further comprises a third connecting part and a third tuning unit, wherein the third connecting part is arranged in the second radiating part and located in the first part of the frame body, the third connecting part is closer to the third part than the second feed part, one end of the third tuning unit is electrically connected to the third connecting part and the second feed part, the other end is grounded, the third tuning unit includes a fifth tuning branch, a sixth tuning branch and at least one third switching unit, the fifth tuning branch comprises a capacitor or an inductor, and the sixth tuning branch comprises a capacitor or an inductor.

9. The antenna structure according to any of claims 1 to 8, characterized in that the frame body is a metal frame of the electronic device, the first part is a lower metal frame of the electronic device, and the second part is a side metal frame of the electronic device.

10. The antenna structure according to any of claims 1 to 8, characterized in that the frame body is arranged in a chassis of the electronic device and integrated with the chassis by insert molding.

11. An electronic device, characterized in that the electronic device comprises the antenna structure according to any of claims 1 to 10.

12. The electronic device according to claim 11, characterized in that the electronic device further comprises a backplate and a display unit, wherein the backplate is arranged on an edge of the frame body, and the display unit is arranged on a side of the frame body away from the backplate.

13. An electronic device, characterized in that the electronic device comprises an antenna structure, wherein the antenna structure comprises a frame body, the frame body being made at least partially of a metallic material, the frame body including at least a first part, a second part and a third part, the second part and the third part facing each other and connected to two ends of the first part, a length of the second part and a length of the third part each being greater than the length of the first part, a first slot, a second slot and a third slot are provided in the frame body, the first slot and the third slot are provided in the first part at intervals, the second slot is provided in the second part, the first slot is closer to the second slot than the third slot,A portion of the frame body between the first and second slots forms a first radiation portion; a ground point is arranged in the third portion; a portion of the frame body between the ground point and the third slot forms a second radiation portion; a first power supply portion is arranged in the first radiation portion; the first power supply portion is located in the first portion of the frame body to supply a current signal to the first radiation portion; a second power supply portion is arranged in the second radiation portion; and the second power supply portion is located in the first portion of the frame body to supply a current signal to the second radiation portion.

14. The electronic device according to claim 13, characterized in that the antenna structure further comprises a first tuning unit, wherein one end of the first tuning unit is electrically connected to the first power supply part, the other end is grounded, the first tuning unit comprises a first tuning branch, a second tuning branch and at least one first switch unit, the first tuning branch comprising a capacitor or an inductor, and the second tuning branch comprising a capacitor or an inductor.

15. The electronic device according to claim 13 or 14, characterized in that the antenna structure further comprises a first connecting part, a second connecting part, and a second tuning unit, wherein the first connecting part and the second connecting part are arranged in the first radiating part at intervals and located in the second part of the frame body, the distance from the second connecting part to the second slot is greater than the distance from the first connecting part to the second slot, one end of the second tuning unit is electrically connected to the first connecting part and the second connecting part, the other end is grounded, the second tuning unit comprises a third tuning branch, a fourth tuning branch, and at least one second switching unit, the third tuning branch comprising a capacitor or an inductor,and the fourth tuning branch comprises a capacitor or an inductor.

16. The electronic device according to any of claims 13 to 15, characterized in that a part of the frame body between the first slot and the third slot forms a parasitic piece of the first radiating part, to allow the antenna structure to generate an additional resonance.

17. The electronic device according to claim 15, characterized in that a part of the frame body between the first slot and the first connection part forms a parasitic piece of the second radiating part, and the parasitic piece of the second radiating part is configured to disperse the current distribution in the second radiating part.

18. The electronic device according to claim 13, characterized in that the antenna structure further comprises a third connecting part and a third tuning unit, wherein the third connecting part is arranged in the second radiating part and located in the first part of the frame body, the third connecting part is closer to the third part than the second feed part, one end of the third tuning unit is electrically connected to the third connecting part and the second feed part, the other end is grounded, the third tuning unit comprises a fifth tuning branch, a sixth tuning branch and at least one third switching unit, the fifth tuning branch comprises a capacitor or an inductor, and the sixth tuning branch comprises a capacitor or an inductor.

19. The electronic device according to any of claims 13 to 18, characterized in that the frame body is a metal frame of the electronic device, the first part is a lower metal frame of the electronic device, and the second and third parts are side metal frames of the electronic device.

20. The electronic device according to any of claims 13 to 18, characterized in that the electronic device further comprises a chassis, and the frame body is disposed in and integrated with the chassis by means of insert molding.

Images