Antenna structure and electronic device having an antenna structure

Abstract

To provide an antenna structure including a frame body, a first feed-in part and a first connection part.SOLUTION: A frame body is made at least partially of a metal 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. Length of the second part is greater than length of the first part. The first part is provided with a first slot; the second part is provided with a second slot. A part of the frame body between a first slot and a second slot forms a first radiation part. A first feed-in part is arranged in the first radiation part and is located at the first part of the frame body. The first feed-in part is electrically connected to a first feed for supplying the first radiation part with a current signal. The first connection part is arranged in the first radiation part and is located at the second part of the frame body. An antenna structure is capable of effectively improving low band (LB) radiation performance. The present invention further provides an electronic device having the antenna structure.SELECTED DRAWING: Figure 3

Description

【Technical Field】 【0001】 The present invention relates to an antenna structure and an electronic device having the antenna structure. 【Background Art】 【0002】 Currently, in order to enhance the quality feeling of electronic devices such as mobile phones and personal digital assistants, metal is increasingly applied to the industrial design (industry design, ID) of electronic devices, such as a metal frame. In an industrial design using a metal frame, designing the metal frame as an antenna becomes a direction of antenna design. 【0003】 In the prior art, the low band (LB) performance is mainly implemented by using a side longitudinal direction component, for example, an inverted-F antenna (IFA) mode or an active antenna longitudinal mode. However, as large screens such as curved screens become popular, the side metal frame body of a mobile phone has become thinner (narrower). Therefore, as the curved screen approaches extremely closely, the side frame body and the periphery of the side frame become weaker, and the antenna performance with the side frame body as the main radiating antenna drops sharply, and the requirement of the low band (LB) performance cannot be satisfied. 【Summary of the Invention】 【0004】 In view of this, there is a need to provide an antenna structure that can effectively improve the low band (LB) radiation performance and an electronic device having the antenna structure. 【0005】 According to a first aspect, the present application provides an antenna structure for an electronic device. The antenna structure includes a frame body, a first feed-in portion, and a first connector, the frame body being made at least partially of a metallic material, the frame body including at least a first portion and a second portion, the second portion being connected to one end of the first portion, the length of the second portion being greater than the length of the first portion, the first portion having a first slot, the second portion having a second slot, the portion of the frame body between the first slot and the second slot forming a first radiating portion, the first feed-in portion being positioned in the first radiating portion and located in the first portion of the frame body, the first feed-in portion being electrically connected to a first feed to supply an electric signal to the first radiating portion, and the first connector being positioned in the first radiating portion and located in the second portion of the frame body. 【0006】 In the antenna structure provided in the first embodiment, a low-frequency (LB) lower feed is used, and unlike the IFA mode, it has the advantage of miniaturization and is less affected by the side curved screen because it is based mainly on the lateral component. Furthermore, the side slots can help improve the lateral component of the side to enhance the low-frequency (LB) FS efficiency. 【0007】 In relation to the first aspect, in some embodiments, the antenna structure further includes a first tuning unit, one end of which is electrically connected to a first feed-in section and the other end is grounded, and the first tuning unit includes a first tuning branch, a second tuning branch, and at least one first switch unit, the first tuning branch including a capacitor or inductor, and the second tuning branch including a capacitor or inductor. The first tuning unit is configured to perform port matching and tuning and frequency adjustment of the first radiating section. 【0008】 In relation to the first aspect, in some embodiments, the antenna structure further includes a second tuning unit, one end of which is electrically connected to a first connection and the other end is grounded, and the second tuning unit includes a third tuning branch, a fourth tuning branch, and at least one second switch unit, the third tuning branch including a capacitor or inductor, and the fourth tuning branch including a capacitor or inductor. The first connection uses the second tuning unit to slightly adjust the frequency and longitudinal components of the first radiator. 【0009】 In relation to the first aspect, in some embodiments, a third slot is further provided in the first portion, and the third slot and the first slot are spaced apart, with the first slot being closer to the second slot than the third slot, and a portion of the frame body between the first slot and the third slot forms a parasitic stub for the first radiator to allow the antenna structure to generate additional resonance. Furthermore, the parasitic stub for the first radiator is tuned to shift the additional resonance to the effective bandwidth of the first radiator, thereby improving the radiation efficiency of the first radiator. 【0010】 In relation to the first aspect, in some embodiments, the frame body further includes a third portion, the third portion and the second portion facing each other and connected to the other end of the first portion, a third slot further provided in the first portion, the third slot and the first slot spaced apart, the first slot being closer to the second slot than the third slot, a ground point located in the third portion, a portion of the frame body between the ground point and the third slot forming a second radiating portion, the antenna structure further includes a second feed-in portion, the second feed-in portion further located in the second radiating portion and situated in the first portion of the frame body, the second feed-in portion being electrically connected to the second feed and supplying a current signal to the second radiating portion. 【0011】 In relation to the first aspect, in some embodiments, a portion of the frame body between the first slot and the first connection portion forms a parasitic stub for the second radiator, and the parasitic stub for the second radiator is configured to disperse the distribution of current on the second radiator. Thus, the specific absorption rate of the second radiator can be effectively reduced. 【0012】 In relation to the first aspect, in some embodiments, the antenna structure further includes a second connection portion, which is located on the first radiating portion and on a second portion of the frame body, the distance from the second connection portion to the second slot being greater than the distance from the first connection portion to the second slot, and the second connection portion is grounded by using a second tuning unit. Frequency tuning is performed on the parasitic stub of the second radiating portion using the first tuning unit and the second tuning unit. 【0013】 In relation to the first aspect, in some embodiments, the antenna structure further includes a third connection and a third tuning unit, the third connection being located on the second radiating portion and situated on a first portion of the frame body, the third connection being closer to the third portion than to the second feed-in portion, one end of the third tuning unit being electrically connected to the third connection and the second feed-in portion and the other end being grounded, the third tuning unit including a fifth tuning branch, a sixth tuning branch, and at least one third switch unit, the fifth tuning branch including a capacitor or inductor, and the sixth tuning branch including a capacitor or inductor. The third tuning unit is configured to perform frequency tuning with respect to the second radiating portion. 【0014】 In relation to the first aspect, in some embodiments, the frame body is a metal frame of an electronic device, that is, the antenna structure is a metal frame antenna, in which 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. 【0015】 Referring to the first aspect, in some embodiments, the antenna structure is not limited to a metal frame antenna, but may alternatively be a mode decoration antenna (MDA) or another type of antenna. For example, if the antenna structure is an MDA antenna, the metal component within the chassis of the electronic device is used as a radiator for implementing the 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 by insert molding. 【0016】 According to a second aspect, the present application further provides an electronic device including an antenna structure provided in the first aspect. 【0017】 Referring to a second aspect, in some embodiments, the electronic device further includes a backplate and a display unit, where the backplate is positioned at the edge of the frame body and the display unit is positioned on the side of the frame body away from the backplate. The backplate is made of metal or another conductive material. Of course, the backplate may also be made of an insulating material such as glass or plastic. That is, the antenna structure can be adapted to an electronic device having a backplate made of a different material. In addition, the antenna structure can be adapted to an electronic device having a large screen, such as a curved screen and a thinner (narrower) side metal frame body. 【0018】 According to a third aspect, the present application further provides an electronic device. The electronic device includes an antenna structure, 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 facing each other and connected to two ends of the first part, the length of the second part and the 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, and the second slot is provided in the second part A first slot is provided, the second slot is closer to the third slot than the third slot, a portion of the frame body between the first slot and the second slot forms a first radiating portion, a grounding point is located in the third portion, a portion of the frame body between the grounding point and the third slot forms a second radiating portion, a first feed-in portion is located in the first radiating portion, the first feed-in portion is located in the first portion of the frame body to supply a current signal to the first radiating portion, a second feed-in portion is located in the second radiating portion, the second feed-in portion is located in the first portion of the frame body to supply a current signal to the second radiating portion. 【0019】 In a third aspect, in some embodiments, the antenna structure further includes a first tuning unit, one end of which is electrically connected to a first feed-in 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 switch unit, the first tuning branch includes a capacitor or inductor, and the second tuning branch includes a capacitor or inductor. The first tuning unit is configured to perform port matching and tuning and frequency adjustment of a first radiating section. 【0020】 In relation to a third aspect, in some embodiments, the antenna structure further includes a first connector, a second connector, and a second tuning unit, the first and second connectors spaced apart on the first radiating portion and located on a second portion of the frame body, the distance from the second connector to the second slot being greater than the distance from the first connector to the second slot, one end of the second tuning unit being electrically connected to the first and second connectors and the other end being grounded, the second tuning unit including a third tuning branch, a fourth tuning branch, and at least one second switch unit, the third tuning branch including a capacitor or inductor, and the fourth tuning branch including a capacitor or inductor. The first connector uses the second tuning unit to make slight adjustments to the frequency and longitudinal components of the first radiating portion. 【0021】 In a third aspect, in some embodiments, a portion of the frame body between the first and third slots forms a parasitic stub for the first radiator, allowing the antenna structure to generate additional resonances. The parasitic stub for the first radiator can also be tuned to shift the additional resonances to the effective bandwidth of the first radiator, thereby improving the radiation efficiency of the first radiator. 【0022】 In a third aspect, in some embodiments, a portion of the frame body between the first slot and the first connector forms a parasitic stub for the second radiator, and the parasitic stub for the second radiator is configured to disperse the current distribution on the second radiator. Thus, the specific absorption rate of the second radiator can be effectively reduced. Frequency tuning is performed on the parasitic stub for the second radiator using a first tuning unit and a second tuning unit. 【0023】 In relation to a third aspect, in some embodiments, the antenna structure further includes a third connection and a third tuning unit, the third connection being positioned on the second radiating portion and on a first portion of the frame body, the third connection being closer to the third portion than to the second feed-in portion, one end of the third tuning unit being electrically connected to the third connection and the second feed-in portion and the other end being grounded, the third tuning unit including a fifth tuning branch, a sixth tuning branch, and at least one third switch unit, the fifth tuning branch including a capacitor or inductor, and the sixth tuning branch including a capacitor or inductor. The third tuning unit is configured to perform frequency tuning with respect to the second radiating portion. 【0024】 In a third aspect, in some embodiments, the frame body is a metal frame of an electronic device, i.e., the antenna structure is a metal frame antenna. In this case, the first part is the lower metal frame of the electronic device, and the second and third parts are the side metal frames of the electronic device. 【0025】 In relation to the first aspect, in some embodiments, the antenna structure is not limited to a metal frame antenna, but may instead be a mode decoration antenna (MDA) or another type of antenna. For example, if the antenna structure is an MDA antenna, the metal component within the chassis of the electronic device is used as a radiator for implementing the 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 by insert molding. 【0026】 It can be understood that the antenna structure provided in the third aspect can implement both medium / high band (MHB) low SAR and low band (LB) radiation performance. That is, by designing the slot position and slot width of the antenna and adjusting the position of the frame body and the slot coupling current intensity, the concentration and dispersion degree distribution of the current on the antenna frame body are affected. The antenna structure provided in the third aspect increases the current distribution area in the medium / high band (MHB) (for example, adjusts the electrical length of the second radiation part), and also shunts the current in cooperation with the parasitic frame body in the medium / high band (MHB) to reduce SAR. For the slot provided on the side frame body (that is, the second slot), a low band (LB) bottom feed is used. Different from the IFA mode, it has miniaturization characteristics and is mainly based on the lateral component, so it is less affected by the side curved surface screen. Furthermore, the side slot can help improve the lateral longitudinal component. Also, the joint tuning of the switch can improve the low band (LB) FS efficiency and adjust the medium / high band (MHB) parasitic resonance. The medium / high band (MHB) performance and low SAR characteristics are ensured, and there is no need to significantly reduce the power to control SAR. 【Brief Description of the Drawings】 【0027】 [Figure 1] It is a schematic diagram of an antenna structure applied to an electronic device according to an exemplary embodiment of the present invention. [Figure 2] It is a schematic diagram from another angle of the electronic device shown in FIG. 1. [Figure 3] It is a circuit diagram of the antenna structure shown in FIG. 1. [Figure 4A] It is a schematic diagram of an existing antenna design solution. [Figure 4B] It is a schematic diagram of an existing antenna design solution. [Figure 4C] It is a schematic diagram of three existing antenna design solutions. [Figure 5A] It is a schematic diagram of different MHB design solutions. [Figure 5B] It is a schematic diagram of different MHB design solutions. [Figure 5C] This is a schematic diagram of different MHB design solutions. [Figure 6] Figure 3 is a schematic diagram of the switch unit's structure. [Figure 7] Figure 1 shows the S-parameters (scattering parameters) and radiation efficiency curves for the antenna structure operating in low-frequency mode. [Figure 8] Figure 1 shows the S-parameters (scattering parameters) and system efficiency curves for the antenna structure operating on the LTE B5 band. [Figure 9] This is a schematic current diagram of resonance 1 of the antenna structure shown in Figure 8, operating on the LTE B5 band. [Figure 10] This is a schematic current diagram of resonance 2 of the antenna structure shown in Figure 8, operating on the LTE B5 band. [Figure 11] Figure 3 shows a curve graph of the S-parameters (scattering parameters) of the antenna structure when the first connection point is connected to a different on-resistance (Ron). [Figure 12] Figure 3 shows a curve graph of the radiation efficiency of the antenna structure when the first connection point is connected to a different on-resistance (Ron). [Figure 13] Figure 3 shows a curve graph of the S-parameters (scattering parameters) of the antenna structure when the second connection point is connected to a different on-resistance (Ron). [Figure 14] Figure 3 shows a curve graph of the radiation efficiency of the antenna structure when the second connection point is connected to a different on-resistance (Ron). [Figure 15] Figure 1 shows curve graphs of the S-parameters (scattering parameters) and radiation efficiency of the antenna structure operating on the LTE B28 band, with or without a second slot on the side. [Figure 16] Figure 1 shows curve graphs of the S-parameters (scattering parameters) and radiation efficiency of the antenna structure operating on the LTE B5 band, with or without a second slot on the side. [Figure 17]Figure 1 shows curve graphs of the S-parameters (scattering parameters) and radiation efficiency of the antenna structure operating on the LTE B8 band, with or without a second slot on the side. [Figure 18] Figure 3 shows the S-parameters (scattering parameters) and radiation efficiency curves for an antenna structure operating on the LTE B28 band when a portion of the frame body between the first and third slots of the antenna structure functions as a parasitic stub. 【0028】 The present invention will be further described in the following specific embodiments with reference to the accompanying drawings. [Modes for carrying out the invention] 【0029】 Explanation of reference numerals for major components 【0030】 [Table 1] 【0031】 The technical solutions in embodiments of the present invention will be clearly described below with reference to the accompanying drawings of embodiments of the present invention. Obviously, the embodiments described are some, but not all, embodiments of the present invention. All other embodiments obtained by those skilled in the art without creative effort based on embodiments of the present invention are within the scope of the present invention. 【0032】 When an element is described as being "electrically connected" to another element, it should be noted that the element may be directly on the other element or may be located between them. When one element is considered to be "electrically connected" to another element, it could be a contact connection such as a wire connection, or a non-contact connection such as a non-contact coupling. 【0033】 Unless otherwise defined, all technical and scientific terms used herein have the same meanings as those commonly understood by those skilled in the art. In this specification, terms used in the description of the present invention are for the sole purpose of describing specific embodiments and are not intended to limit the invention. 【0034】 Hereinafter, several embodiments of the present invention will be described in detail with reference to the attached drawings. The following embodiments and features may be combined, provided that no inconsistencies arise. 【0035】 Referring to Figures 1 and 2, an exemplary implementation of the present invention provides an antenna structure 100 (see Figure 3). The antenna structure may be applied to an electronic device 200 such as a mobile phone, tablet computer, or personal digital assistant (PDA), and is configured to transmit and receive radio waves to transmit and exchange radio signals. 【0036】 It can be understood that the electronic device 200 may use one or more of the following technologies: Bluetooth (BT) communication technology, global positioning system (GPS) communication technology, wireless fidelity (Wi-Fi) communication technology, global system for mobile communications (GSM) communication technology, wideband code division multiple access (WCDMA) communication technology, long-term evolution (LTE) communication technology, 5G communication technology, SUB-6G communication technology, or other future communication technologies. 【0037】 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 is substantially a ring structure and is made of metal or another conductive material. The backplate 112 is positioned at the ends of the frame 111. The backplate 112 may be made of metal or another conductive material. Of course, the backplate 112 may be made of an insulating material such as glass or plastic as an alternative. 【0038】 In this embodiment, it can be understood that an opening (not shown) is provided on the side of the frame 111 facing the backplate 112, and that this opening is configured to accommodate the display unit 201. The display unit 201 is provided with a display plane, and it can be understood that the display plane is exposed through the opening. It can be understood that the display unit 201 may 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. 【0039】 Referring to Figure 3, the antenna structure 100 includes at least a frame body, a first feed-in section 12, a second feed-in section 13, a first connection section 15, a second connection section 17, and a third connection section 18. 【0040】 The frame body is made of a metal material, at least partially. In this embodiment, the frame body is the frame 111 of the electronic device 200. The frame 111 includes at least a first portion 115, a second portion 116, and a third portion 117. In this embodiment, the first portion 115 is the lower end of the electronic device 200, i.e., the first portion 115 is the lower metal frame of the electronic device 200. The antenna structure 100 forms the lower antenna of the electronic device 200. The second portion 116 and the third portion 117 face each other and are located at both ends of the first portion 115, respectively, preferably perpendicularly. In this embodiment, the length of the second portion 116 or the length of the third portion 117 is greater than the length of the first portion 115. That is, the second portion 116 and the third portion 117 are both the side metal frames of the electronic device 200. 【0041】 The frame 111 is further provided with at least one slot. In this embodiment, the frame 111 is provided with three slots: a first slot 120, a second slot 121, and a third slot 122. The first slot 120 and the third slot 122 are spaced apart in the first portion 115. The second slot 121 is located in the second portion 116. The first slot 120 is closer to the second portion 116 than the third slot 122. The third slot 122 is closer to the third portion 117 than the first slot 120. 【0042】 In this embodiment, it may be understood that the antenna structure 100 further includes a grounding point 19. The grounding point 19 is located in the third portion 117. 【0043】 In this embodiment, the first slot 120, the second slot 121, and the third slot 122 all penetrate and separate from the frame 111. At least one slot and the grounding point 19 jointly define at least two radiating portions on the frame 111. In this embodiment, the first slot 120, the second slot 121, the third slot 122, and the grounding point 19 jointly define the first radiating portion F1 and the second radiating portion F2 on the frame 111. In this embodiment, the portion of the frame 111 between the first slot 120 and the second slot 121 forms the first radiating portion F1. The portion of the frame 111 between the third slot 122 and the grounding point 19 forms the second radiating portion F2. That is, the first radiating portion F1 is located in the lower right corner of the electronic device 200 and is formed by a portion of the first portion 115 and a portion of the second portion 116. The second radiating portion F2 is located in the lower left corner of the electronic device 200 and is formed from a portion of the first portion 115 and a portion of the third portion 117. The electrical length of the first radiating portion F1 is greater than the electrical length of the second radiating portion F2. 【0044】 In this embodiment, the first slot 120, the second slot 121, and the third slot 122 are each filled with an insulating material such as plastic, rubber, glass, wood, or ceramic, but are not limited to these. 【0045】 In this embodiment, it can be understood that the widths of the first slot 120, the second slot 121, and the third slot 122 are all small, and may range, for example, from 0.5 millimeters (mm) to 2 mm. In a preferred solution, the widths of the first slot 120, the second slot 121, and the third slot 122 may be 0.8 mm, 1 mm, or 1.2 mm, respectively. 【0046】 In this embodiment, it may be understood that the first feed-in portion 12 is located within the housing 11. The first feed-in portion 12 is positioned on the first radiating portion F1 and on the first portion 115. The first feed-in portion 12 may be electrically connected to the first feed 202 by supplying a current signal to the first radiating portion F1 using a dome, microstrip, strip, coaxial cable, etc. 【0047】 The second feed-in section 13 is located in the housing 11. The second feed-in section 13 is located on the second radiating section F2 and on the first section 115. The second feed-in section 13 may be electrically connected to the second feed 203 by supplying a current signal to the second radiating section F2 using a dome, microstrip, strip, coaxial cable, etc. 【0048】 In this embodiment, it can be understood that the first feed-in portion 12 and the second feed-in portion 13 may be fabricated from materials such as iron, copper foil, or a conductor in a laser direct structuring (LDS) process. 【0049】 The first connection portion 15 is positioned on the first radiating portion F1 and located on the second portion 116. The second connection portion 17 is positioned on the first radiating portion F1 and located on the second portion 116. In other words, in this embodiment, the first connection portion 15 and the second connection portion 17 are spaced apart on the second portion 116, and the distance from the first connection portion 15 to the second slot 121 is less than the distance from the second connection portion 17 to the second slot 121. That is, the first connection portion 15 is closer to the second slot 121 than the second connection portion 17. 【0050】 The third connection portion 18 is located in the housing 11. In this embodiment, the third connection portion 18 is located on the second radiating portion F2 and on the first portion 115. The third connection portion 18 is closer to the third portion 117 than to the second feed-in portion 13. 【0051】 In this embodiment, the electrical length L of the first radiator F1 (see Figure 3) is adjusted so that the electrical length L is approximately half the wavelength corresponding to its resonant frequency. Therefore, when current is supplied to the first feed-in section 12, the first radiator F1 can generate resonance by using the half-wave mode. In this case, the radiating mode of the antenna structure 100 is the longitudinal mode. In addition, when current is supplied to the first feed-in section 12, the first radiator F1 can alternatively generate resonance by using the composite right / left-handed (CRLH) mode. In this case, the radiating mode of the antenna structure 100 is the transverse mode. That is, when current is supplied to the first feed-in section 12, the first radiator F1 can generate a radiated signal within the first radiating band by initiating the first operating mode using both the CRLH mode and the half-wave mode. In this embodiment, the first operating mode is the low-band (LB) mode. The frequencies of the first radiation band include, but are not limited to, the LTE B28 / B5 / B8 bands. 【0052】 It can be understood that the longitudinal mode may refer to a radiation mode in which the longitudinal metal frame (e.g., the second portion 116) acts as the main radiator for outward radiation. The transverse mode may refer to a radiation mode in which the transverse lower metal frame (e.g., the first portion 115) acts as the main radiator for outward radiation. 【0053】 When current is supplied to the first feed-in section 12, the CRLH mode is used as the primary resonant mode, and it can be understood that this mode, unlike the inverted F antenna (IFA) mode, has miniaturization characteristics and is mainly based on the lateral component, thereby being less affected by the side radiators or curved screens. In addition, an antenna structure 100 having, for example, a slot provided on the side of the second section 116 (i.e., the second slot 121) can help improve the longitudinal component of the side radiators to ensure that the antenna structure 100 has relatively good LB radiation performance. 【0054】 When current is supplied to the second feed-in section 13, the antenna structure 100 can generate a radiated signal in a second radiating band by initiating a second operating mode using both CRLH mode and parasitic mode. The second operating mode is a middle / high band (MHB) mode. The frequencies of the second radiating band include, but are not limited to, the LTE B1 / B3 / B4 / B7 / B38 / B39 / B40 / B41, WCDMA B1 / B2, and GSM 1800 / 1900 bands. 【0055】 With the advancement of information technology, it is understandable that the public enjoys the conveniences provided by information technology, but also pays attention to the harmful effects of electromagnetic radiation from wireless communication terminals on the human body. Specific Absorption Rate (SAR) is an important indicator for mobile phones and is a content that antenna engineers pay particular attention to during antenna design. Generally, Total Radiated Power (TRP) of electronic devices is closely related to SAR. However, in actual antenna design, the radiated power of the mobile phone is reduced to control SAR under normal conditions. For example, Figures 4A, 4B, and 4C are schematic diagrams of three existing antenna solutions. In the three antenna solutions, a SAR sensor is added for scenario determination to obtain different SAR values, and then the radiated power of the mobile phone is reduced to meet the SAR requirements. However, simply reducing the radiated power of the mobile terminal to control SAR impairs the radio performance of the product, affects the user experience, and reduces the competitiveness of the product. 【0056】 In the antenna structure 100, the second radiating section F2 uses two resonant modes, including the CRLH mode and the parasitic mode. The CRLH mode is located on the side of the second feed-in section 13. The CRLH mode is on the same side as the second feed-in section 13. Therefore, the current distribution area of ​​the CRLH mode increases (for example, the electrical length of the second radiating section F2 is adjusted or increased), the parasitic mode of the second radiating section F2 spans 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 section 15 forms a parasitic stub, dispersing the current distribution, so that the antenna structure 100 can operate in the mid-to-high frequency range and have relatively low SAR characteristics without reducing its radiated power. That is, as shown in Figure 3, region 1 forms the MHB region of the antenna structure 100. In other words, the second radiating section F2 is mainly in CRLH mode, and the parasitic mode of the second radiating section F2 spans the first slot 120 and the third slot 122, with a portion of the frame 111 between the first slot 120 and the first connection section 15 forming a parasitic stub. In addition, in the figure, region 2 forms the LB area of ​​the antenna structure 100. 【0057】 Figures 5A, 5B, and 5C are schematic diagrams of three different MHB design solutions. Figure 5A uses a long left-handed system and far parasitic modes, Figure 5B uses a short left-handed system and far parasitic modes, and Figure 5C uses a short left-handed system and near parasitic modes. Long left-handed system and short left-handed system mean that the electrical length of the second radiator F2 in Figure 5A is greater than the electrical length of the second radiator F2 in Figures 5B and 5C. Far parasitism and near parasitism refer to parasitic stubs far from the second radiator F2 (e.g., a portion of the frame 111 between the first slot 120 and the first connector 15, referring to Figures 5A and 5B) and parasitic stubs close to the second radiator F2 (e.g., a portion of the frame 111 between the first slot 120 and the third slot 122, referring to Figure 5C), respectively. Clearly, simulations of the SAR values ​​in the three solutions described above revealed that the solution in Figure 5A (i.e., the solution used herein) exhibits a more dispersed component tangent to the magnetic field (H field) and implements characteristics of a relatively low SAR value. 【0058】 In this embodiment, it may be understood that the antenna structure 100 further 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-in section 12, and the other end is grounded. The first tuning unit SW1 is configured to perform port matching and tuning and frequency adjustment of the first radiating section. 【0059】 One end of the second tuning unit SW2 is electrically connected to the first connection 15 and the second connection 17. The other end of the second tuning unit SW2 is grounded. 【0060】 In this embodiment, it can be understood that the second tuning unit SW2 forms a multiple switch, i.e., the first connection 15 and the second connection 17 share the second tuning unit SW2. The first connection 15 may switch to different tuning branches using the second tuning unit SW2 to adjust the frequency and longitudinal components. For example, the first connection 15 may switch or adjust to a zero-ohm resistor or a 1-nanohenry (nH) / 2-nH inductor using the second tuning unit SW2 to fine-tune the frequency and longitudinal components of the first radiator F1. The second connection 17 adjusts the parasitic resonant frequency of the second radiator F2 using the second tuning unit SW2. 【0061】 One end of the third tuning unit SW3 is electrically connected to the second feed-in section 13 and the third connection section 18, and the other end is grounded. The third tuning unit SW3 is configured to perform frequency tuning of the second radiator F2 in CRLH mode. In addition, frequency tuning may be performed for the parasitic modes of the second radiator F2 using the first tuning unit SW1. In a preferred solution, further auxiliary tuning may be performed for the parasitic modes of the second radiator F2 by using the second tuning unit SW2 based on the first tuning unit SW1. That is, tuning of the second radiator F2 in CRLH mode is mainly performed using the third tuning unit SW3. Tuning is performed for the parasitic modes of the second radiator using the first tuning unit SW1 and the second tuning unit SW2. 【0062】 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 formed by combining, but are not limited to, multiple single-pole single-throw (SPST) switches. For example, referring 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 may be grounded, and the other end may be connected to a corresponding tuning branch. For example, switch 61 may be connected to tuning branch L1, switch 62 to tuning branch L2, and switch 63 to tuning branch L3. Tuning branches L1, L2, and L3 may each include a capacitor or an inductor. The tuning unit may selectively turn on different tuning branches to implement frequency adjustment. 【0063】 Of course, in other embodiments, the tuning units, for example, the first tuning unit SW1, the second tuning unit SW2, and the third tuning unit SW3, may further include other types of switch units and are not limited to the SPST switches described above. 【0064】 In this embodiment, it can be understood that the antenna structure 100 can work in cooperation with the joint tuning of tuning units, for example, a first tuning unit SW1, a second tuning unit SW2, and a third tuning unit SW3, to improve free space (FS) efficiency in low-frequency modes. In addition, parasitic resonances in mid- and high-frequency modes can be adjusted, ensuring performance and low SAR characteristics in mid- and high-frequency modes. 【0065】 FS efficiency can be understood as the efficiency of the antenna structure 100 in low-frequency mode when the electronic device 200 is not being held by the user. 【0066】 Figure 7 shows the S-parameters (scattering parameters) and radiation efficiency curves of the antenna structure 100 operating in low-frequency mode. Curve S41 shows the S11 value of the antenna structure 100 operating on the LTE B28 band. Curve S42 shows the S11 value of the antenna structure 100 operating on the LTE B5 band. Curve S43 shows the S11 value of the antenna structure 100 operating on the LTE B8 band. Curve S44 shows the radiation efficiency of the antenna structure 100 operating on the LTE B28 band. Curve S45 shows the radiation efficiency of the antenna structure 100 operating on the LTE B5 band. Curve S46 shows the radiation efficiency of the antenna structure 100 operating on the LTE B8 band. Curve S47 shows the system efficiency of the antenna structure 100 operating on the LTE B28 band. Curve S48 shows the radiation efficiency of the antenna structure 100 operating on the LTE B5 band. Curve S49 shows the system efficiency of antenna structure 100 operating on the LTE B8 band. 【0067】 Figure 8 shows curve graphs of the S-parameters (scattering parameters) and system efficiency of an antenna structure operating on the LTE B5 band. Curve S51 shows the S11 value of antenna structure 100 operating on the LTE B5 band. Curve S52 shows the system efficiency of antenna structure 100 operating on the LTE B5 band. 【0068】 Figure 9 is a schematic current diagram of resonance 1 of the antenna structure 100 operating on the LTE B5 band. Figure 10 is a schematic current diagram of resonance 2 of the antenna structure 100 operating on the LTE B5 band. From Figures 8 and 9, it can be understood that as the first radiator F1 provides power at the bottom, resonance 1 radiates mainly using the CRLH mode, i.e., the transverse mode. In addition, at the lateral grounding positions of the antenna structure 100, i.e., at the positions of the first connection 15 and the second connection 17, the frame body (i.e., the first radiator F1) is in the high-current region of the antenna, forming the maximum current density Jmax. Therefore, parasitic resistances, including the second tuning unit SW2, greatly affect the low-frequency efficiency of the antenna structure 100. From Figures 8 and 10, it can be understood that when the first radiator F1 operates at resonance 2, resonance 2 radiates mainly using the half-wave mode, i.e., the longitudinal mode. In addition, current is supplied to the first feed-in section 12, flows through the first radiating section F1, and is radiated from the first slots 120 and second slots 121 at both ends of the first radiating section F1. 【0069】 Figures 11 and 12 illustrate the effect of the on-resistance (Ron) generated by the first connection 15 connected to the second tuning unit SW2 on the antenna performance. Curve S81 shows the S11 value of the antenna structure 100 when the on-resistance (Ron) is 2 ohms. Curve S82 shows the S11 value of the antenna structure 100 when the on-resistance (Ron) is 1.5 ohms. Curve S83 shows the S11 value of the antenna structure 100 when the on-resistance (Ron) is 1 ohm. Curve S84 shows the S11 value of the antenna structure 100 when the on-resistance (Ron) is 0.5 ohms. Curve S85 shows the S11 value of the antenna structure 100 when the on-resistance (Ron) is 0 ohms. Curve S91 shows the radiation efficiency of the antenna structure 100 when the on-resistance (Ron) is 2 ohms. Curve S92 shows the radiation efficiency of antenna structure 100 when the on-resistance (Ron) is 1.5 ohms. Curve S93 shows the radiation efficiency of antenna structure 100 when the on-resistance (Ron) is 2 ohms. Curve S94 shows the radiation efficiency of antenna structure 100 when the on-resistance (Ron) is 0.5 ohms. Curve S95 shows the radiation efficiency of antenna structure 100 when the on-resistance (Ron) is 0 ohms. 【0070】 Clearly, from Figures 11 and 12, it can be seen that when the on-resistance (Ron) is 2 ohms, the effect is approximately 1.6 dB. When the on-resistance (Ron) is 1 ohm, the effect is approximately 0.9 dB. That is, the effect of the on-resistance (Ron) of the first connection 15 on the antenna efficiency is relatively large. Therefore, in this embodiment, in the case of low frequency (LB), the first connection 15 may be designed to be directly grounded using a zero-ohm resistor other than the on-resistance (Ron) of the second tuning unit SW2, for example. 【0071】 Figures 13 and 14 show the effect of the on-resistance (Ron) generated by the second connection 17 connected to the second tuning unit SW2 on the antenna performance, respectively. Curve S101 shows the S11 value of the antenna structure 100 when the on-resistance (Ron) is 2 ohms. Curve S102 shows the S11 value of the antenna structure 100 when the on-resistance (Ron) is 1 ohm. Curve S103 shows the S11 value of the antenna structure 100 when the on-resistance (Ron) is 0 ohms. Curve S111 shows the radiation efficiency of the antenna structure 100 when the on-resistance (Ron) is 2 ohms. Curve S112 shows the radiation efficiency of the antenna structure 100 when the on-resistance (Ron) is 1 ohm. Curve S113 shows the radiation efficiency of the antenna structure 100 when the on-resistance (Ron) is 0 ohms. 【0072】 Clearly, from Figures 13 and 14, it can be seen that when the second tuning unit SW2 uses three single-pole single-throw (SPST) switches, the 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 on-resistance (Ron) of the second tuning unit SW2 is 1 ohm, and the effect is approximately 0.2 dB. That is, the influence of the second connection 17 on the antenna structure 100 is relatively small. Therefore, when port tuning at low frequencies using the first tuning unit SW1, a switch with a relatively small on-resistance (Ron), such as a four-SPST switch, may be selected to reduce the influence of the on-resistance (Ron) of the second connection 17 on antenna efficiency. 【0073】 Figure 15 can be understood as a curve graph of the S-parameters (scattering parameters) and radiation efficiency of the antenna structure 100 operating on the LTE B28 band when a second slot 121 is provided on the side of the antenna structure 100, or when the second slot 121 is not provided. Curve S121 shows the S11 value of the antenna structure 100 operating on the LTE B28 band when the second slot 121 is provided. Curve S122 shows the radiation efficiency of the antenna structure 100 operating on the LTE B28 band when the second slot 121 is provided. Curve S123 shows the system efficiency of the antenna structure 100 operating on the LTE B28 band when the second slot 121 is provided. Curve S124 shows the S11 value of the antenna structure 100 operating on the LTE B28 band when the second slot 121 is not provided. Curve S125 shows the radiation efficiency of the antenna structure 100 operating on the LTE B28 band when the second slot 121 is not provided. Curve S126 shows the system efficiency of the antenna structure 100 operating on the LTE B28 band when the second slot 121 is not provided. 【0074】 Figure 16 is a curve graph of the S-parameters (scattering parameters) and radiation efficiency of the antenna structure 100 operating on the LTE B5 band when a second slot 121 is provided on the side of the antenna structure 100, or when the second slot 121 is not provided. Curve S131 shows the S11 value of the antenna structure 100 operating on the LTE B5 band when the second slot 121 is provided. Curve S132 shows the radiation efficiency of the antenna structure 100 operating on the LTE B5 band when the second slot 121 is provided. Curve S133 shows the system efficiency of the antenna structure 100 operating on the LTE B5 band when the second slot 121 is provided. Curve S134 shows the S11 value of the antenna structure 100 operating on the LTE B5 band when the second slot 121 is not provided. Curve S135 shows the radiation efficiency of the antenna structure 100 operating on the LTE B5 band when the second slot 121 is not provided. Curve S136 shows the system efficiency of the antenna structure 100 operating on the LTE B5 band when the second slot 121 is not provided. 【0075】 Figure 17 is a curve graph of the S-parameters (scattering parameters) and radiation efficiency of the antenna structure 100 operating on the LTE B8 band when a second slot 121 is provided on the side of the antenna structure 100, or when the second slot 121 is not provided. Curve S141 shows the S11 value of the antenna structure 100 operating on the LTE B8 band when the second slot 121 is provided. Curve S142 shows the radiation efficiency of the antenna structure 100 operating on the LTE B8 band when the second slot 121 is provided. Curve S143 shows the system efficiency of the antenna structure 100 operating on the LTE B8 band when the second slot 121 is provided. Curve S144 shows the S11 value of the antenna structure 100 operating on the LTE B8 band when the second slot 121 is not provided. Curve S145 shows the radiation efficiency of the antenna structure 100 operating on the LTE B8 band when the second slot 121 is not provided. Curve S146 shows the system efficiency of the antenna structure 100 operating on the LTE B8 band when the second slot 121 is not provided. 【0076】 Clearly, as can be seen from Figures 15 to 17, when the antenna structure 100 is provided with a second slot 121, the low-bandwidth (LB) performance of the antenna structure 100 is improved by 1 dB to 1.5 dB compared to existing solutions without a slot, resulting in relatively good FS performance. 【0077】 Referring back to Figure 3, it can be understood that in this embodiment, the electronic device 200 further 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 located in the housing 11. 【0078】 In this embodiment, 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 portion 117. The third electronic element 23 is a Subscriber Identity Module (SIM) card holder. The third electronic element 23 is located between the first feed-in portion 12 and the second portion 116. 【0079】 In other embodiments, it can be understood that a portion of the frame 111 between the first slot 120 and the third slot 122 in the antenna structure 100 may alternatively form a parasitic stub F3 in low-frequency mode. The parasitic stub F3 is spaced apart from both the first radiator F1 and the second radiator F2 and is positioned to protrude. Figure 18 is a curve graph of the S-parameters (scattering parameters) and radiation efficiency of the antenna structure 100 operating on the LTE B28 band with and without tuning for the parasitic stub F3. Curve S151 shows the S11 value of the antenna structure 100 operating on the LTE B28 band without tuning for the parasitic stub F3. Curve S152 shows the radiation efficiency of the antenna structure 100 operating on the LTE B28 band without tuning for the parasitic stub F3. Curve S153 shows the S11 value of antenna structure 100 operating in the LTE B28 band when tuning for parasitic stub F3. Curve S154 shows the radiation efficiency of antenna structure 100 operating on the LTE B28 band when tuning for parasitic stub F3. 【0080】 Clearly, when a portion of the frame 111 between the first slot 120 and the third slot 122 within the antenna structure 100 forms a parasitic stub F3 in low-frequency mode, the antenna structure 100 can generate an additional resonance 3. From Figure 18, it can be seen that tuning the parasitic stub F3 can shift the resonance 3 into the effective bandwidth of the first radiator F1, significantly improving the radiation efficiency of the LTE B28 band. 【0081】 In one embodiment, it may be understood that tuning to the parasitic stub F3 in low-frequency mode may be performed by using a first tuning unit SW1, that is, by multiplexing the first tuning unit SW1. Of course, in other embodiments, a corresponding switch unit may be additionally provided to tune to the parasitic stub F3 in low-frequency mode. 【0082】 In this embodiment, it can be understood that the second radiator F2 is located on the same side as the second electronic element 22. Of course, in other embodiments, the position of the second radiator F2 may be adjusted as needed. For example, the second radiator F2 may be located on the same side as the third electronic element 23, while the first radiator F1 may be located on the side of the second electronic element 22. That is, the positions of the first radiator F1 and the second radiator F2 may be adjusted (e.g., swapped) as needed. 【0083】 In this embodiment, the antenna structure 100 uses a separate feed-in mode for low frequencies and mid- and high frequencies, that is, separate feeds are performed using a first feed-in section 12 and a second feed-in section 13, and a first tuning unit SW1, a second tuning unit SW2, and a third tuning unit SW3 are provided. The on / off states of the first tuning unit SW1, the second tuning unit SW2, and the third tuning unit SW3 are controlled and adjusted to effectively achieve full LB / MB / HB coverage, as well as low SAR characteristics in the mid- and high frequencies (MHB) and relatively good low-frequency (LB) radiation performance. 【0084】 As described above, in this embodiment, the frame body of the antenna structure 100 is directly formed by the frame 111 of the electronic device 200, meaning that the chassis (frame) of the electronic device 200 is made of a metal material, and the antenna structure 100 is a metal frame antenna. Of course, in other embodiments, the antenna structure 100 is not limited to a metal frame antenna and could instead be a mode decoration antenna (MDA) or another type of antenna. For example, if the antenna structure 100 is an MDA antenna, the metal component within the chassis of the electronic device 200 serves as the frame body and implements the 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 by insert molding. 【0085】 In conclusion, as the full-curved screen approaches its limit, the antenna structure 100 of the present invention can implement both mid-to-high frequency (MHB) low SAR and low-frequency (LB) radiation performance. That is, the slot positions and widths of the antenna are designed, and the position of the frame body and the slot coupling current strength are adjusted to affect the distribution of current concentration and dispersion on the antenna frame body. The antenna structure 100 increases the current distribution area of ​​the mid-to-high frequency (MHB) CRLH mode (for example, by adjusting the electrical length of the second radiator F2), and also reduces SAR by distributing the current in cooperation with the mid-to-high frequency (MHB) parasitic frame body. In addition, for the slots provided in the side frame body (i.e., the second slot 121), a low-frequency (LB) lower feed is used, and the CRLH mode is mainly used as the resonant mode. Unlike the IFA mode, the CRLH mode has miniaturization characteristics mainly based on the lateral component, and is therefore less affected by the curved screen on the side. Furthermore, the side slots can help improve the lateral longitudinal component. Furthermore, the switch joint tuning can improve low-frequency (LB) FS efficiency and adjust mid-high frequency (MHB) parasitic resonances, ensuring mid-high frequency (MHB) performance and low SAR characteristics, without requiring a significant reduction in power to control SAR. 【0086】 The aforementioned implementations are intended solely to illustrate the technical solutions of the present invention and are not intended to constitute any limitation. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art will understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the present invention. Those skilled in the art can also make various changes to the design of the present invention without departing from the spirit of the invention, as long as they do not depart 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

[Claim 1] An antenna structure for an electronic device, wherein the electronic device comprises a frame, the frame comprising at least a lower frame, a first side frame, and a second side frame, the first side frame and the second side frame facing each other, one end of the lower frame connected to the first side frame, the other end of the lower frame connected to the second side frame, a first slot and a third slot provided in the lower frame, the distance from the first slot to the first side frame being less than the distance from the third slot to the first side frame, and a second slot provided in the first side frame. The antenna structure comprises a first radiating portion, a first connecting portion, and a first feed-in portion, wherein a portion of the frame between the first slot and the second slot forms the first radiating portion, the first connecting portion is located on the first radiating portion and on the first side frame, and the first feed-in portion is located on the first radiating portion. The antenna structure further comprises a second radiating section, a grounding point, and a second feed-in section, wherein the grounding point is located on the second side frame, or the grounding point is located on the lower frame, the distance from the grounding point to the second side frame is less than the distance from the third slot to the second side frame, the portion of the frame between the grounding point and the third slot forms the second radiating section, and the second feed-in section is located on the second radiating section. The antenna structure further comprises a third connection portion and a third tuning unit, wherein the third connection portion is located on the second radiating portion, one end of the third tuning unit is electrically connected to the third connection portion and the second feed-in portion, and the other end of the third tuning unit is grounded. [Claim 2] The antenna structure according to claim 1, wherein the antenna structure is configured to simultaneously generate a first resonance and a second resonance when a first signal is supplied to the first radiating section via the first feed-in section. [Claim 3] The antenna structure according to claim 2, wherein a portion of the frame between the first slot and the third slot is configured to form a first parasitic stub of the first radiating portion. [Claim 4] The antenna structure is configured to generate a third resonance based on the first parasitic stub when the first signal is supplied to the first radiating section via the first feed-in section. The antenna structure according to claim 3, wherein the frequency of the third resonance is different from the frequencies of the first resonance and the second resonance. [Claim 5] The antenna structure according to claim 4, wherein the frequency of the third resonance is smaller than the frequency of the first resonance. [Claim 6] The antenna structure according to any one of claims 1 to 5, wherein the first connection is directly grounded, or the first connection is grounded by an inductor, the inductor is configured to adjust the longitudinal component of the first radiating portion, the longitudinal component is configured on the first side frame. [Claim 7] The antenna structure according to any one of claims 2 to 5, wherein the electrical length of the first radiating portion is close to half the wavelength corresponding to the frequency of the second resonance. [Claim 8] The antenna structure according to any one of claims 1 to 7, wherein the lower frame comprises a USB interface module and / or a sound cavity and / or a card holder, and the distance from the third connection portion to the USB interface module is less than the distance from the ground point to the USB interface module. [Claim 9] The antenna structure according to any one of claims 1 to 8, further comprising a first tuning unit, one end of the first tuning unit being electrically connected to the first feed-in portion, and the other end of the first tuning unit being grounded. [Claim 10] The antenna structure further comprises a first tuning unit, one end of which is electrically connected to the first feed-in section, and the other end of which is grounded. The antenna structure according to claim 4, wherein the antenna structure is configured to generate the third resonance at a frequency less than the frequency of the first resonance, based on the first parasitic stub and the first tuning unit. [Claim 11] The first feed-in unit is configured to supply the first signal to the first radiating unit, The antenna structure according to any one of claims 1 to 10, wherein the second feed-in portion is configured to supply a second signal to the second radiating portion, and the second signal is different from the first signal. [Claim 12] The antenna structure according to claim 11, wherein the first feed-in portion is electrically connected to a first feed to supply the first signal to the first radiating portion, and the second feed-in portion is electrically connected to a second feed to supply the second signal to the second radiating portion, and the second feed is different from the first feed. [Claim 13] The antenna structure according to claim 11 or 12, wherein the electrical length of the first radiating portion is greater than the electrical length of the second radiating portion. [Claim 14] The antenna structure according to any one of claims 11 to 13, wherein the first radiating unit is configured to generate a radiated signal in a first radiating band, the first radiating band being low bandwidth, and the second radiating unit is configured to generate a radiated signal in a second radiating band, the second radiating band being medium / high bandwidth. [Claim 15] The antenna structure according to any one of claims 1 to 14, wherein a portion of the frame between the first slot and the first connection portion is configured to form a second parasitic stub of the second radiating portion. [Claim 16] The antenna structure according to claim 15, wherein the antenna structure is configured to disperse the distribution of current on the second radiating portion based on the second parasitic stub when a second signal is supplied to the second radiating portion via the second feed-in portion. [Claim 17] The antenna structure further comprises a first tuning unit, one end of which is electrically connected to the first feed-in section, and the other end of which is grounded. The antenna structure according to any one of claims 1 to 16, wherein the first tuning unit is configured to adjust the parasitic resonant frequency of the second radiating portion. [Claim 18] The antenna structure according to claim 9, 10, or 17, wherein 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 inductor, and the second tuning branch comprising a capacitor or inductor. [Claim 19] The antenna structure according to any one of claims 1 to 18, wherein the third tuning unit is configured to perform frequency tuning with respect to the second radiating section, and the third tuning unit comprises a fifth tuning branch, a sixth tuning branch, and at least one third switch unit, the fifth tuning branch comprises a capacitor or an inductor, and the sixth tuning branch comprises a capacitor or an inductor. [Claim 20] The antenna structure according to any one of claims 1 to 19, wherein the first feed-in portion is made of a material comprising at least one of iron, copper foil, and a conductor in a laser direct structuring process, and the first feed-in portion is electrically connected to the first feed using a dome, microstrip, strip, and coaxial cable. [Claim 21] An electronic device comprising the antenna structure described in any one of claims 1 to 20.

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