An electronic device

Abstract

The present application provides an electronic device, which relates to the technical field of electronic devices and can improve the radiation efficiency of antennas in electronic devices. The electronic device includes a reference ground layer, a first radiator and a second radiator, the reference ground layer has a first edge and a second edge and a third edge respectively connected to both ends of the first edge; the first radiator has a first grounding point and a first feeding point arranged at intervals, and the first grounding point is electrically connected to the reference ground layer; the second radiator is electrically connected to the first edge of the reference ground layer, the end section of the second edge connected to the first edge, or the end section of the third edge connected to the first edge, the electrical length of the reference ground layer in the first direction is 1 / 2 wavelength of the main resonant frequency band of the first radiator, and the parasitic resonant frequency band generated by the second radiator when the radio frequency signal is fed into the first feeding point is lower than the main resonant frequency band generated by the first radiator when the radio frequency signal is fed into the first feeding point. The electronic device provided by the present application is used in a communication system.

Description

Technical Field

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

[0002] At present, the design of antenna solutions for electronic devices generally uses metal frames, metal radiators set on the inner surface of non-metal frames, or metal radiators embedded in non-metal materials to achieve communication functions. However, with the popularity of large screens such as curved screens, the size of the frame of electronic devices in the thickness direction of electronic devices has become smaller and smaller. Therefore, as the curved screen becomes more and more extreme, the clearance environment of the antenna of the electronic device deteriorates, and the radiation capacity becomes worse and worse, so the radiation efficiency of the antenna is low. Summary of the invention

[0003] An embodiment of the present application provides an electronic device, which can improve the radiation efficiency of an antenna in the electronic device.

[0004] To achieve the above-mentioned purpose, some embodiments of the present application provide an electronic device, which includes a reference stratum, a first radiator and a second radiator, the reference stratum having a first edge and a second edge and a third edge respectively connected to both ends of the first edge; the first radiator having a first grounding point and a first feeding point arranged at intervals, the first grounding point being electrically connected to the reference stratum, and the first feeding point being used to feed the first radiator; the second radiator being arranged at intervals from the first radiator, the second radiator being electrically connected to the first edge of the reference stratum, the end section of the second edge connected to the first edge, or the end section of the third edge connected to the first edge, the reference stratum can be excited to generate a 1 / 2 wavelength characteristic mode along a first direction within the main resonant frequency band of the first radiator, that is, the electrical length of the reference stratum in the first direction is 1 / 2 wavelength of the main resonant frequency band of the first radiator, the first direction is parallel to the plane where the reference stratum is located and is perpendicular to the extension direction of the first edge of the reference stratum, and the parasitic resonant frequency band generated by the second radiator when the RF signal is fed into the first feeding point is lower than the main resonant frequency band generated by the first radiator when the RF signal is fed into the first feeding point.

[0005] In the above technical solution, a second radiator is added, and the parasitic resonance frequency band generated by the coupling between the second radiator and the first radiator when the RF signal is fed into the first feeding point is lower than the main resonance frequency band of the first radiator. The second radiator is further electrically connected to the first edge of the reference stratum, and the reference stratum can be excited to generate a 1 / 2 wavelength characteristic mode along the first direction within the main resonance frequency band of the first radiator, that is, the electrical length of the reference stratum in the first direction is 1 / 2 wavelength of the main resonance frequency band of the first radiator, so that the reference stratum can be excited through the second radiator while the first radiator is excited to resonate, thereby improving the radiation efficiency of the antenna.

[0006] In a possible implementation, a parasitic resonance frequency band generated by the second radiator when the RF signal is fed into the first feeding point is close to a main resonance frequency band generated by the first radiator when the RF signal is fed into the first feeding point.

[0007] In a possible implementation, the second radiator is electrically connected to an end section of the first edge of the reference formation, wherein the end section of the first edge refers to a section on the first edge that is within a fourth preset length range from the first end or the second end of the first edge. In some embodiments, the fourth preset length may be 1 / 2 times the length of the second edge. In this way, when the reference formation is excited by the second radiator, the first directional mode is well excited, which can further improve the radiation efficiency of the antenna.

[0008] In a possible implementation, the second radiator is electrically connected to the first edge of the reference ground layer, the end section of the second edge connected to the first edge, or the end section of the third edge connected to the first edge through a lumped parameter element. In this way, the electrical length of the second radiator is adjusted through the lumped parameter element to adjust the parasitic resonance frequency band generated by the second radiator when the RF signal is fed into the first feeding point to be lower than the main resonance frequency band of the first radiator, while reducing the physical length of the second radiator, thereby reducing the length occupied by the antenna on the frame.

[0009] In a possible implementation manner, the lumped parameter element is an inductor, a capacitor, or a circuit obtained by connecting one or both of the inductor and the capacitor in parallel, in series, or in series-parallel connection.

[0010] In a possible implementation, the second radiator has a second feeding point and a second grounding point that are spaced apart, the second feeding point is used to feed the second radiator, the second grounding point is electrically connected to the reference ground layer through a filter or a switching circuit, the filter and the switching circuit are used to prevent the signal of the first frequency band from passing through, and allow the signal of the second frequency band to pass through, wherein the first frequency band includes the minimum frequency value in the parasitic resonance frequency band generated by the second radiator when the RF signal is fed into the first feeding point to the maximum frequency value in the main resonance frequency band generated by the first radiator when the RF signal is fed into the first feeding point, and the second frequency band includes the main resonance frequency band generated by the second radiator when the RF signal is fed into the second feeding point. In this way, the antenna provided in this embodiment can not only transmit or receive signals of the first frequency band when the RF signal is fed into the first feeding point, but also transmit or receive signals of the second frequency band when the RF signal is fed into the second feeding point, so the antenna has more application frequency bands and a wider application range.

[0011] In a possible implementation, the filter is an LC filter.

[0012] In a possible implementation, the switch circuit includes a first switch and a plurality of different first tuning elements, wherein the plurality of first tuning elements are electrically connected to a reference ground layer; the first switch is used to disconnect the electrical connection path between the second ground point and the plurality of first tuning elements when the first feeding point is fed with a radio frequency signal of a first frequency band; when the second feeding point is fed with a radio frequency signal of a second frequency band, the different first tuning elements are switchably electrically connected to the second ground point to adjust the resonant frequency band generated by the second radiator. In this way, the switch circuit can not only prevent the signal of the first frequency band from passing through and allow the signal of the second frequency band to pass through, but also adjust the working frequency band of the second radiator.

[0013] In a possible implementation, the electronic device is a mobile phone, the length of the middle plate in the longitudinal direction is 150 mm ± 10 mm, the width of the middle plate in the transverse direction is 75 mm ± 5 mm, the first direction is consistent with the longitudinal direction of the middle plate, the shorter edge of the middle plate forms the first edge of the reference formation, the first frequency band is located in the low frequency band, and the second frequency band is located in the medium and high frequency band. In this way, the antenna provided in the embodiment of the present application can cover the low / middle / high band (LMH) frequency band and has a wide range of applications.

[0014] In a possible implementation, the electronic device is a mobile phone, the length of the middle plate in the longitudinal direction is 150 mm ± 10 mm, the width of the middle plate in the transverse direction is 75 mm ± 5 mm, the first direction is consistent with the transverse direction of the middle plate, the longer edge of the middle plate forms the first edge of the reference formation, the first frequency band is located in the MHB frequency band, and the second frequency band is located in the LB frequency band.

[0015] In a possible implementation, the electronic device further includes a conductive middle plate and a conductive frame; the middle plate has a first edge and a second edge and a third edge connected to both ends of the first edge respectively; the middle plate forms a reference stratum; the first edge of the middle plate forms the first edge of the reference stratum; the second edge of the middle plate forms the second edge of the reference stratum; the third edge of the middle plate forms the third edge of the reference stratum; the frame is arranged around the edge of the middle plate; the frame includes a first edge; the first edge is arranged around the first edge of the middle plate; the frame has at least a first gap, a second gap and a third gap; the first gap and the second gap are located on the first edge; a portion of the frame located on one side of the first gap and adjacent to the first gap forms a first radiator; the third gap and the first radiator are located on both sides of the first gap respectively; the second gap and the first gap are the same gap or the second gap is located between the third gap and the first gap; a portion of the frame located between the second gap and the third gap forms a second radiator; there are gaps between the first radiator and the middle plate and between the second radiator and the middle plate. In this way, a frame antenna is formed, which can improve the radiation efficiency of the frame antenna.

[0016] In a possible implementation, the second gap is located between the third gap and the first gap, and the portion of the frame located between the first gap and the second gap forms a suspended conductor. The electronic device further includes: a USB device, which is located inside the suspended conductor and is arranged close to the suspended conductor. Since the USB device is usually arranged close to the bottom edge of electronic devices such as mobile phones and tablet computers, it is possible to construct an antenna located at the bottom edge of the electronic device and increase the radiation efficiency of the antenna located at the bottom edge of the electronic device.

[0017] In a possible implementation, the first slit and the second slit are symmetrically arranged about the center point of the first side, so as to improve the aesthetics of the electronic device.

[0018] In a possible implementation, the first gap, the second gap, and the third gap are filled with dielectric material to ensure the structural integrity of the frame.

[0019] In a possible implementation, the gap is filled with a dielectric material to ensure the structural integrity of the middle frame.

[0020] In a possible implementation, the first edge of the middle plate has a first end; the distance between the first end of the first edge and the first slit in the extension direction of the first edge is greater than the distance between the first end of the first edge and the second slit in the extension direction of the first edge, and the second radiator is electrically connected to the end section where the first end of the first edge of the middle plate is located. The end section where the first end of the first edge is located refers to a section on the first edge that is within a fourth preset length range from the first end of the first edge. Since the distance between the end section where the first end of the first edge is located and the second radiator is shorter, the electrical connection path between the second radiator and the end section where the first end is located is shorter, which facilitates wiring.

[0021] In a possible implementation, the first end of the first edge is connected to the second edge of the middle plate; the frame further has a second edge, the second edge is arranged around the second edge of the middle plate, and the third gap is arranged on the second edge.

[0022] In a possible implementation, the second radiator includes an intersecting first segment and a second segment, the first segment is located between the second gap and the second segment, the second segment is located between the first segment and the third gap, and the length of the second segment is less than or equal to 1 / 4 times the length of the second side.

[0023] In a possible implementation, the first edge of the middle plate also has a second end opposite to the first end, and the second end of the first edge is connected to the third edge of the middle plate; the frame also has a third side, and the third side is arranged around the third edge of the middle plate, and the frame also has a fourth gap, and the fourth gap is arranged on the third side, and the portion of the frame located between the first gap and the fourth gap forms a first radiator.

[0024] In a possible implementation, the first radiator includes an intersecting third section and a fourth section, the third section is located between the first gap and the fourth section, the fourth section is located between the third section and the fourth gap, and the length of the fourth section is less than or equal to 1 / 2 times the length of the third side.

[0025] In a possible implementation, a portion of the frame adjacent to the third slit forms a third radiator, the third radiator and the second radiator are respectively located on both sides of the third slit, and a gap is provided between the third radiator and the middle plate; the third radiator has a third grounding point and a third feeding point arranged at intervals, the third grounding point is electrically connected to the reference ground layer, and the third feeding point is used to feed the third radiator. In this way, the third radiator can resonate when a radio frequency signal is fed into the third feeding point, thereby further increasing the number of radiation frequency bands of the antenna.

[0026] In a possible implementation, the third radiator further has a connection point, the electronic device further includes a switching circuit, the switching circuit includes a second switching switch and a plurality of different second tuning elements, the plurality of second tuning elements are electrically connected to the reference ground layer; the second switching switch is used to switchably connect the different second tuning elements to the connection point to adjust the resonant frequency of the third radiator. In this way, the resonant frequency of the third radiator is tuned by the switching circuit to further increase the coverage frequency band of the antenna.

[0027] In one possible implementation, the first switching switch in the switching circuit is packaged together with the second switching switch in the switching circuit, and the switching circuit of the overall switch formed after the packaging is the superposition of the switching circuit of the first switching switch and the switching circuit of the second switching switch, thereby reducing the number of components included in the electronic device and helping to simplify the assembly process of the electronic device. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 A front view of an electronic device provided in some embodiments of the present application;

[0029] Figure 2 for Figure 1 an exploded view of the electronic device shown;

[0030] Figure 3a for Figure 1 A schematic diagram of an internal structure of the electronic device shown;

[0031] Figure 3b for Figure 3a A schematic diagram of a structure formed after a first feeding point in the electronic device is arranged close to a first grounding point;

[0032] Figure 4a for Figure 1A schematic diagram of another internal structure of the electronic device shown;

[0033] Figure 4b for Figure 4a A schematic diagram of a structure formed after a first feeding point in the electronic device is arranged close to a first grounding point;

[0034] Figure 5 A three-dimensional diagram of an electronic device with a curved screen provided in some embodiments of the present application;

[0035] Figure 6 for Figure 1 A schematic diagram of another internal structure of the electronic device shown;

[0036] Figure 7 for Figure 1 A schematic diagram of another internal structure of the electronic device shown;

[0037] Figure 8 for Figure 1 A schematic diagram of another internal structure of the electronic device shown;

[0038] Fig. 9 for Figure 1 A schematic diagram of another internal structure of the electronic device shown;

[0039] Fig.10 Shown Figure 3a , Figure 6 , Figure 7 and Figure 8 The antenna in the electronic device shown in the figure generates a radiation efficiency curve comparison diagram of the antenna frequency band B28 (703MHz to 803MHz) in a free space (FS) state;

[0040] Fig.11 Shown Figure 3a , Figure 6 and Figure 7 The antenna in the electronic device shown in the figure is in the FS state, generating a radiation efficiency curve comparison diagram of the antenna frequency band B5 (824MHz to 894MHz);

[0041] Fig.12 Shown Figure 3a , Figure 6 and Figure 7 The antenna in the electronic device shown in the figure is in the FS state, generating a radiation efficiency curve comparison diagram of the antenna frequency band B8 (880MHz to 960MHz);

[0042] Fig.13 for Figure 1 A schematic diagram of another internal structure of the electronic device shown;

[0043] Fig.14 for Fig.13 A partial enlarged view of the electronic device shown;

[0044] Fig.15 for Fig.13 Another partial enlarged view of the electronic device shown;

[0045] Fig.16 for Fig.13 A graph showing the mid-high frequency input return loss coefficient of the antenna in the electronic device in the FS state, the beside head hand left (BHHL) state and the beside head hand right (BHHR) state;

[0046] Fig.17 for Figure 1 Another schematic diagram of the internal structure of the electronic device 1 is shown;

[0047] Fig.18 for Fig.17 A graph showing a mid-high frequency input return loss coefficient of an antenna in the electronic device in the FS state, the BHHL state, and the BHHR state;

[0048] Fig.19 for Fig.13 and Fig.17 A comparison diagram of the mid- and high-frequency radiation efficiency curves of the antenna in the electronic device shown in the FS state, the BHHL state, and the BHHR state;

[0049] Fig. 20 for Figure 1 A schematic diagram of another internal structure of the electronic device shown;

[0050] Fig.21 for Figure 1 A schematic diagram of another internal structure of the electronic device shown;

[0051] Fig. 22 for Figure 1 Another schematic diagram of the internal structure of the electronic device shown.

[0052] Reference numerals:

[0053] 1-electronic device; 11-display screen; 12-middle frame; 121-middle board; 122-frame; 122a-first side; 122b-second side; 122c-third side; 122d-fourth side; 13-back cover; 14-antenna; 15-first RF front end; 23-reference ground layer; 141-first radiator; 1411-first section; 1412-second section; 16-gap; 142a-first feeding point; 141b-first grounding point; 142-second radiator; 143-suspension Floating conductor; 18-USB device; 17-lumped parameter element; 142b-second grounding point; 142a-second feeding point; 19-filter; 21-switching circuit; 211-first switching switch; 212-first tuning element; 20-second RF front end; 144-third radiator; 144b-third grounding point; 144a-third feeding point; 144c-connection point; 22-third RF front end; 24-switching circuit; 241-second switching switch; 242-second tuning element. DETAILED DESCRIPTION

[0054] In the embodiments of the present application, the terms "first", "second", and "third" are used only for descriptive purposes and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first", "second", and "third" may explicitly or implicitly include one or more of the features.

[0055] It should be noted that in the embodiments of the present application, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, an element defined by the sentence "includes a ..." does not exclude the presence of other identical elements in the process, method, article or device including the element.

[0056] The present application provides an electronic device, which may be a portable electronic device or other suitable electronic device. For example, the electronic device may be a laptop, a tablet computer, a smaller device such as a mobile phone, a watch, a pendant device or other wearable or miniature device, a cellular phone, a media player, etc.

[0057] See also Figure 1 and Figure 2 , Figure 1 A front view of an electronic device 1 provided in some embodiments of the present application, Figure 2 for Figure 1The exploded view of the electronic device 1 is shown. In this embodiment, the electronic device 1 is a mobile phone. The electronic device 1 includes a display screen 11, a middle frame 12 and a back cover 13.

[0058] The display screen 11 is used to display images, videos, etc. The display screen 11 can be a flexible display screen or a rigid display screen. For example, the display screen 11 can be an organic light-emitting diode (OLED) display screen, an active-matrix organic light-emitting diode or an active-matrix organic light-emitting diode (AMOLED) display screen, a mini organic light-emitting diode (MIL-I) display screen, a micro organic light-emitting diode (MIL-I) display screen, a micro organic light-emitting diode (MIL-I) display screen, a quantum dot light-emitting diode (QLED) display screen, or a liquid crystal display (LCD).

[0059] The back cover 13 constitutes the rear housing of the electronic device 1. The back cover 13 is used to protect the electronic components in the electronic device 1 from water and dust, and to ensure the neat appearance of the electronic device 1. The back cover 13 may be made of a conductive material such as metal, or a non-conductive material such as glass or plastic. When the back cover 13 is made of a conductive material such as metal, the back cover 13 may be used as a reference ground for the electronic components or radio frequency components in the electronic device.

[0060] The middle frame 12 includes a middle plate 121 and a frame 122. The middle plate 121 is located between the display screen 11 and the back cover 13 and is stacked with the display screen 11 and the back cover 13 in the thickness direction of the electronic device 1 (Z direction shown in the figure). The forming material of the middle plate 121 is a conductive material such as metal. The middle plate 121 is a plate-like structure that is approximately rectangular. The middle plate 121 has a first edge a and a fourth edge d that are opposite to each other, and a second edge b and a third edge c that are opposite to each other. The first edge a and the fourth edge d are respectively two shorter edges of the middle plate 121, and the second edge b and the third edge c are respectively two longer edges of the middle plate 121. It should be noted that the first edge a and the fourth edge d can also be respectively two longer edges of the middle plate 121, in which case the second edge b and the third edge c are respectively two shorter edges of the middle plate 121. The length l of the middle plate 121 along the extension direction of the two longer edges is 150 mm ± 10 mm, and the width w of the middle plate 121 along the extension direction of the two shorter edges is 75 mm ± 5 mm. For the convenience of the following description, the extending direction of the two shorter edges of the middle plate 121 is defined as the transverse direction (the X direction shown in the figure), and the extending direction of the two longer edges of the middle plate 121 is defined as the longitudinal direction (the Y direction shown in the figure).

[0061] The frame 122 is arranged around the edge of the middle plate 121. The frame 122 includes a first side 122a, a second side 122b, a third side 122c and a fourth side 122d. The first side 122a is arranged around the first edge a, the second side 122b is arranged around the second edge b, the third side 122c is arranged around the third edge c, and the fourth side 122d is arranged around the fourth edge d. The first side 122a, the second side 122b, the third side 122c and the fourth side 122d are connected end to end to form a square frame 122. In this embodiment, the electronic device 1 is a square plate-shaped structure, that is, the frame 122 is square. The forming material of the frame 122 can be a conductive material such as metal, or a non-conductive material such as plastic or resin.

[0062] See also Figure 3a , Figure 3a for Figure 1 The electronic device 1 is a schematic diagram of an internal structure. The electronic device 1 further includes an antenna 14 , a first radio frequency front end 15 and a reference ground layer 23 .

[0063] The antenna 14 includes a first radiator 141. The first radiator 141 is used to radiate radio frequency signals to the outside world and / or receive radio frequency signals from the outside world, so that the electronic device 1 can communicate with the outside world through the antenna 14. In some embodiments, please continue to refer to Figure 3aThe frame 122 is formed of a conductive material such as metal, has a first gap A, and a portion of the frame 122 located on one side of the first gap A and adjacent to the first gap A forms a first radiator 141. Specifically, the structure of the first radiator 141 may include the following two implementations:

[0064] The first implementation method: Please continue to refer to Figure 3a , the frame 122 also has a fourth gap D, and the portion of the frame 122 located between the first gap A and the fourth gap D forms the first radiator 141. In some embodiments, the first gap A is provided on the first side 122a, the fourth gap D is provided on the third side 122c, the first radiator 141 includes a third section 1411 and a fourth section 1412 intersecting each other, the third section 1411 is located between the first gap A and the fourth section 1412, the third section 1411 is provided around the first edge a of the middle plate 121, the fourth section 1412 is located between the third section 1411 and the fourth gap D, and the fourth section 1412 is provided around the third edge c of the middle plate 121. In some embodiments, the length of the fourth section 1412 is less than or equal to 1 / 2 times the length of the third side 122c. It can be understood that the first gap A and the fourth gap D can also be provided on the first side 122a, which is not specifically limited here.

[0065] The second implementation method: Please refer to Figure 4a , Figure 4a for Figure 1 Another internal structure diagram of the electronic device 1 is shown. In this embodiment, the end of the first radiator 141 away from the first slit A is connected to the other parts of the frame 122. The end of the first radiator 141 away from the first slit A refers to the end of the first radiator 141 that is farthest from the first slit A along the extension direction of the first radiator 141 (corresponding to Figure 4a In some embodiments, the first gap A is disposed on the first side 122a, the portion where the first radiator 141 is connected to other portions of the frame 122 (that is, the K end) is located on the third side 122c, the first radiator 141 includes a third section 1411 and a fourth section 1412 intersecting each other, the third section 1411 is located between the first gap A and the fourth section 1412, the third section 1411 is disposed around the first edge a of the middle plate 121, the fourth section 1412 is located between the third section 1411 and the K end, and the fourth section 1412 is disposed around the third edge c of the middle plate 121.

[0066] In the above-mentioned first and second implementations, dielectric materials may be filled in the first gap A and the fourth gap D to ensure the structural integrity of the frame 122. In some embodiments, there is a gap 16 between the first radiator 141 and the middle plate 121 to ensure that the first radiator 141 has a good clearance environment, so that the first radiator 141 has a good signal transmission function. In some embodiments, the other parts of the frame 122 except the first radiator 141 can be connected to the middle plate 121 and integrally formed. It can be understood that when the other parts of the frame 122 except the first radiator 141 are used as the radiator of the antenna of the electronic device, there is also a gap 16 between the other parts of the frame 122 except the first radiator 141 and the middle plate 121 to ensure that the antenna has a good clearance environment. In some embodiments, the gap 16 may be filled with dielectric materials to ensure the structural integrity of the middle frame 12.

[0067] It is understandable that when the frame 122 is formed of a non-conductive material such as plastic or resin, the frame 122 cannot form the first radiator 141. The first radiator 141 can be arranged on the inner side of the frame 122 or embedded in the frame 122. The frame 122 has a first frame segment, and the first radiator 141 is arranged close to the first frame segment or embedded in the first frame segment. It should be noted that the first radiator 141 arranged close to the first frame segment in this application means that the first radiator 141 can be arranged close to the first frame segment, or can be arranged close to the first frame segment, that is, there can be a certain small gap between the first radiator 141 and the first frame segment. In this way, there is no need to set the first gap A and the fourth gap D on the frame 122, and the structural integrity of the frame 122 can be ensured. In this embodiment, the structure of the first radiator 141 can be a flexible printed circuit (FPC) form, a laser direct structuring (LDS) form or a mode decoration antenna (MDA) form, which is not specifically limited here.

[0068] The first radiator 141 has a first feeding point 141 a and a first grounding point 141 b which are spaced apart from each other.

[0069] The reference ground layer 23 is electrically connected to the first ground point 141b of the first radiator 141. In some embodiments, the reference ground layer 23 is formed by the middle plate 121. It is understandable that the reference ground layer 23 can also be formed by other structures in the electronic device 1, such as a metal layer in the main board or a back cover 13 formed of a conductive material such as metal. In some embodiments, please continue to refer to Figure 3a, the reference ground layer 23 is electrically connected to the first ground point 141b through a connecting member such as a spring or a wire. Figure 4a , the first grounding point 141b of the first radiator 141 is the end K of the first radiator 141, and the reference ground layer 23 is connected to the end K of the first radiator 141 through the frame 122 to achieve grounding connection. It should be noted that the first grounding point 141b of the present application is not an actual point, and the position where the reference ground layer 23 is electrically connected to the first radiator 141 through the grounding member or part of the frame 122 is the first grounding point 141b.

[0070] The first RF front end 15 is electrically connected to the first feeding point 141a of the first radiator 141, and the first RF front end 15 is used to feed RF signals to the first radiator 141 and / or receive external RF signals received by the first radiator 141. In some embodiments, the first RF front end 15 includes a transmitting path and a receiving path. The transmitting path includes devices such as a power amplifier and a filter, and the signal is transmitted to the first radiator 141 after power amplification, filtering and other processing by the power amplifier, filter and other devices, and then transmitted to the outside through the first radiator 141; the receiving path includes devices such as a low noise amplifier and a filter, and the external signal received by the first radiator 141 is processed by low noise amplifier, filter and other devices and then transmitted to the RF chip, so that the electronic device 1 can communicate with the outside through the first RF front end 15 and the antenna 14. It should be noted that the first feeding point 141a of the present application is not an actual point, and the position where the first RF front end 15 is electrically connected to the first radiator 141 is the first feeding point 141a mentioned in the present application. In some embodiments, the first RF front end 15 is disposed between the middle plate 121 of the middle frame 12 and the back cover 13. In some embodiments, the frequency of the RF signal fed into the first RF front end 15 is within the main resonant frequency band of the first radiator 141.

[0071] In the embodiment of the present application, there is no specific limitation on the locations of the first feeding point 141a and the first grounding point 141b on the first radiator 141 , as long as the first feeding point 141a and the first grounding point 141b are spaced apart along the extension direction of the first radiator 141 .

[0072] For some examples, see Figure 3a, the first feeding point 141a is located between the first grounding point 141b and the first gap A. For example, the first feeding point 141a is disposed close to the first gap A, that is, the distance between the first feeding point 141a and the first gap A in the extension direction of the first radiator 141 is defined as a first distance, and the distance between the first feeding point 141a and the first grounding point 141b in the extension direction of the first radiator 141 is defined as a second distance, and the first distance is smaller than the second distance. The portion of the first radiator 141 located between the first gap A and the first grounding point 141b constitutes a composite left / right (CRLH) antenna, and the resonant frequency band of the CRLH antenna is the main resonant frequency band of the first radiator 141. It can be understood that, under the premise that the first feeding point 141a is disposed between the first grounding point 141b and the first gap A, if the first feeding point 141a is disposed close to the first grounding point 141b, that is, the first distance is greater than the second distance, please refer to Figure 3b , Figure 3b for Figure 3a The schematic diagram of the structure formed after the first feeding point 141a in the electronic device 1 is arranged close to the first grounding point 141b, in this embodiment, the portion of the first radiator 141 located between the first gap A and the first grounding point 141b constitutes an inverted-F antenna (IFA), and the resonant frequency band of the IFA antenna is the main resonant frequency band of the first radiator 141. It can be understood that the first feeding point 141a can also be located on the side of the first grounding point 141b close to the fourth gap D, that is, the first feeding point 141a is located between the first grounding point 141b and the fourth gap D.

[0073] Similarly, see Figure 4a , the first feeding point 141a is arranged close to the first gap A, that is, the distance between the first feeding point 141a and the first gap A in the extension direction of the first radiator 141 is defined as the first distance, and the distance between the first feeding point 141a and the first grounding point 141b in the extension direction of the first radiator 141 is defined as the second distance, and the first distance is smaller than the second distance. In this way, the first radiator 141 constitutes a CRLH antenna, and the resonant frequency band of the CRLH antenna is the main resonant frequency band of the first radiator 141. It can be understood that the first feeding point 141a can also be arranged close to the first grounding point 141b, that is, the first distance is larger than the second distance, please refer to Figure 4b , Figure 4b for Figure 4aThe schematic diagram of the structure is a diagram of a structure formed when the first feeding point 141a in the electronic device 1 is arranged close to the first grounding point 141b. In this embodiment, the portion of the first radiator 141 located between the first gap A and the first grounding point 141b constitutes an IFA antenna, and the resonant frequency band of the IFA antenna is the main resonant frequency band of the first radiator 141.

[0074] The embodiment of the present application provides that the antenna in the electronic device 1 uses the conductive frame 122, the conductive radiator disposed inside the non-conductive frame 122, or the conductive radiator embedded inside the non-conductive frame 122 to transmit or receive signals. With the popularity of large screens such as curved screens, at least two opposite edges of the display screen 11 are bent toward the back cover 13 to form an electronic device with a curved screen. For example, refer to 5, Figure 5 A three-dimensional diagram of an electronic device 1 with a curved screen provided in some embodiments of the present application. In this embodiment, the edge of the display screen 11 ( Figure 5 Only the two opposite sides are shown, and the four sides may also be bent toward the back cover 13. In this way, under the premise of ensuring that the thickness of the electronic device 1 remains unchanged, the size of the frame 122 in the thickness direction of the electronic device 1 (that is, direction Z, which is perpendicular to the direction X, and the direction Z is also perpendicular to the direction Y) (that is, Figure 5 The d1 in the figure is small, and the curved portions on both sides of the display screen 11 are along the thickness direction of the electronic device (that is, Figure 5 The frame 122 is shielded in the Z direction of the non-conductive frame 122, or the frame 122 is projected onto the display screen 11 in the thickness direction (that is, on the orthographic projection area of ​​the display screen 11 on the XY plane). Therefore, the antenna uses the conductive frame 122, the conductive radiator disposed inside the non-conductive frame 122, or the conductive radiator embedded inside the non-conductive frame 122 to achieve signal radiation, and the radiation efficiency is low.

[0075] To improve the radiation efficiency of the antenna, refer to Figure 6 , Figure 6 for Figure 1Another schematic diagram of the internal structure of the electronic device 1 is shown. In this embodiment, the antenna 14 includes a second radiator 142 in addition to the first radiator 141 described in any of the above embodiments. The second radiator 142 is spaced apart from the first radiator 141, and the signal on the first radiator 141 can be coupled to the second radiator 142. The reference stratum 23 has a first edge and a second edge and a third edge connected to both ends of the first edge. In some embodiments, the first edge a of the middle plate 121 forms the first edge of the reference stratum 23, the second edge b of the middle plate 121 forms the second edge of the reference stratum 23, and the third edge c of the middle plate 121 forms the third edge of the reference stratum 23. The first edge a of the middle plate 121, the second edge b of the middle plate 121, and the third edge c of the middle plate 121 respectively represent three sequentially connected side walls of the middle plate 121. The second radiator 142 is electrically connected to the first edge a of the middle plate 121, the end section of the second edge b connected to the first edge a, or the end section of the third edge c connected to the first edge a. Among them, the first edge a can be a straight edge, a curved edge, or a wavy edge, which is not specifically limited here. The first edge a has a first end M and a second end N. The first end M of the first edge a is the end of the first edge a connected to the second edge b, and the second end N of the first edge a is the end of the first edge a connected to the third edge c. The end section of the second edge b connected to the first edge a refers to a section on the second edge b whose distance from the first end M is within the first preset length range, and the first preset length can be 1 / 2 times, 1 / 4 times or 1 / 8 times of the second edge b, which is not specifically limited here. The end section of the third edge c connected to the first edge a refers to a section on the third edge c whose distance from the second end N is within the second preset length range, and the second preset length can be 1 / 2 times, 1 / 4 times or 1 / 8 times of the third edge c, which is not specifically limited here.

[0076] It should be noted that when the orthographic projection area of ​​the second radiator 142 on the plane where the middle plate 121 is located is located inside the middle plate 121, the second radiator 142 can also be connected to the largest surface of the middle plate 121 within a 50 mm length area from the first edge a, the end section of the second edge b connected to the first edge a, and the end section of the third edge c connected to the first edge a.

[0077] For some embodiments, please refer to Figure 6 , the frame 122 is formed of a conductive material such as metal, and the frame 122 has a second gap B and a third gap C in addition to the first gap A, and the portion of the frame 122 between the second gap B and the third gap C forms the second radiator 142. Specifically, the relative positional relationship between the first gap A, the second gap B, the third gap C and the first radiator 141 may include the following embodiments 1 and 2:

[0078] Example 1: Please continue to read Figure 6 , the second slit B is the same slit as the first slit A, and the third slit C is located on the side of the second slit B away from the first radiator 141, that is, the first slit A and the second slit B are located between the third slit C and the first radiator 141. In this way, the second radiator 142 and the first radiator 141 are adjacent and spaced apart, and the distance between the second radiator 142 and the first radiator 141 is relatively close, the antenna 14 has a compact structure, and occupies a relatively small space on the frame 122.

[0079] In the above-mentioned first embodiment, the third gap C may also be filled with a dielectric material to ensure the structural integrity of the frame 122. Optionally, there is a gap 16 between the second radiator 142 and the middle plate 121 to ensure that the second radiator 142 has a good clearance environment, so that the second radiator 142 has good signal radiation performance. In some embodiments, the gap 16 may be filled with a dielectric material to ensure the structural integrity of the middle frame 12.

[0080] Example 2: Please refer to Figure 7-Figure 9 , Figure 7-Figure 9 for Figure 1 Schematic diagrams of three other internal structures of the electronic device 1 shown. In this embodiment, the second slit B is spaced apart from the first slit A, and in the extension direction along the frame 122, the second slit B and the third slit C are located on the side of the first slit A away from the first radiator 141, that is, the first radiator 141 is located on one side of the first slit A, and the second slit B and the third slit C are located on the other side of the first slit A. The third slit C is located on the side of the second slit B away from the first slit A, that is, the second slit B is located between the third slit C and the first slit A. A suspended conductor 143 is formed on the portion of the frame 122 located between the second slit B and the first slit A. It can be understood that at least one slit can be added to the portion of the frame 122 located between the second slit B and the first slit A to form a plurality of suspended conductors 143 between the second slit B and the first slit A. The suspension conductor 143 is not connected to the reference ground (including the reference ground layer 23), and when the first feeding point 141a feeds a radio frequency signal, the second radiator 142 can be indirectly coupled to the first radiator 141 through the suspension conductor 143. In this way, at least one suspension conductor 143 is provided between the second radiator 142 and the first radiator 141, and the position of the second radiator 142 can be adjusted to a position with a better clearance environment through the at least one suspension conductor 143, so as to facilitate the electrical connection of the second radiator 142 to the first edge a of the middle plate 121.

[0081] On the basis of the above-mentioned second embodiment, the first gap A and the second gap B are both arranged on the first side 122a of the frame 122. In some embodiments, the first gap A and the second gap B are symmetrically arranged about the center of the first side 122a, so that the appearance effect of the frame 122 is better. In some embodiments, for example, the universal serial bus (USB) device 18 is arranged on the inner side of the suspension conductor 143 and is arranged close to the suspension conductor 143. Among them, the inner side of the suspension conductor 143 refers to the side of the suspension conductor 143 facing the inside of the electronic device when it is applied to the electronic device. In addition, the USB device 18 is arranged close to the suspension conductor 143, which means that the USB device 18 can be arranged close to the suspension conductor 143, or it can be arranged close to the suspension conductor 143, that is, there can be a certain small gap between the USB device 18 and the suspension conductor 143.

[0082] In the above-mentioned second embodiment, the first gap A and the second gap B are both arranged on the first side 122a of the frame 122. In some embodiments, please continue to refer to Figure 7-Figure 9 , compared with the first gap A, the second gap B is arranged closer to the first end M of the first edge a, that is, the distance between the first gap A and the first end M of the first edge a in the extension direction of the first side 122a is greater than the distance between the second gap B and the first end M of the first edge a in the extension direction of the first side 122a. It can be understood that, compared with the first gap A, the second gap B can also be arranged closer to the second end N of the first edge a, that is, the distance between the first gap A and the first end M of the first edge a in the extension direction of the first side 122a is less than the distance between the second gap B and the first end M of the first edge a in the extension direction of the first side 122a, which is not specifically limited here.

[0083] When the second slit B is disposed closer to the first end M of the first edge a than the first slit A, the third slit C may be disposed on the first side 122a of the frame 122 or on the second side 122b of the frame 122. Figure 7 , the third gap C is disposed on the first side 122a of the frame 122. In some other embodiments, please refer to Fig. 9 , Fig. 9 for Figure 1Another internal structure schematic diagram of the electronic device 1 is shown. In this embodiment, the third slit C is provided on the second side 122b of the frame 122. At this time, the second radiator 142 includes a first section 1421 and a second section 1422 intersecting each other. The first section 1421 is located between the second slit B and the second section 1422. The first section 1421 is provided around the first edge a of the middle plate 121. The second section 1422 is located between the first section 1421 and the third slit C. The second section 1422 is provided around the second edge b of the middle plate 121. In some embodiments, the length of the second section 1422 is less than or equal to 1 / 4 times the length of the second side 122b.

[0084] In the above-mentioned second embodiment, the second gap B and the third gap C may also be filled with dielectric material to ensure the structural integrity of the frame 122. Optionally, there is a gap 16 between the second radiator 142 and the middle plate 121, and between the suspension conductor 143 and the middle plate 121, to ensure that the second radiator 142 and the suspension conductor 143 have a good clearance environment, so that the second radiator 142 and the suspension conductor 143 have good signal radiation performance. In some embodiments, the gap 16 may be filled with dielectric material to ensure the structural integrity of the middle frame 12.

[0085] It is understandable that when the frame 122 is formed of a non-conductive material such as plastic or resin, the frame 122 cannot form the second radiator 142 described in the first and second embodiments. The second radiator 142 can be arranged on the inner side of the frame 122 or embedded in the frame 122. The frame 122 has a second frame segment, and the second radiator 142 is arranged close to the second frame segment or embedded in the second frame segment. In this way, the second gap B and the third gap C do not need to be arranged on the frame 122, and the structural integrity of the frame 122 can be ensured. In this embodiment, the structural form of the second radiator 142 can be a flexible printed circuit (FPC) form, a laser direct structuring (LDS) form, or a mode decoration antenna (MDA) form, which is not specifically limited here.

[0086] In the above-mentioned embodiment 1 and embodiment 2, please refer to Figure 6-Figure 9, the reference layer 23 can be excited to generate a 1 / 2 wavelength characteristic mode along the first direction within the main resonant frequency band of the first radiator 141. To meet this requirement, in general, the electrical length of the reference layer 23 in the first direction is 1 / 2 wavelength of the main resonant frequency band of the first radiator 141. For example, if the main resonant frequency band of the first radiator 141 is B28 (703MHz to 803MHz), the electrical length of the reference layer 23 in the first direction is 1 / 2 wavelength of the main resonant frequency of 703MHz to 1 / 2 wavelength of the main resonant frequency of 803MHz.

[0087] The electrical length of the reference stratum 23 in the first direction refers to: the ratio of the physical length (i.e., mechanical length or geometric length) D1 of the reference stratum 23 in the first direction multiplied by the transmission time t1 of the electrical or electromagnetic signal in the reference stratum 23 along the first direction to the time t2 required for the signal to pass through the same distance as the physical length of the reference stratum 23 in the first direction in free space, that is, the electrical length L' of the reference stratum 23 in the first direction can satisfy the following formula: L'=D1×t1 / t2. Alternatively, the electrical length of the reference stratum 23 in the first direction can also refer to: the ratio of the physical length (i.e., mechanical length or geometric length) D1 of the reference stratum 23 in the first direction to the wavelength λ of the electromagnetic wave transmitted by the reference stratum 23, that is, the electrical length L' of the reference stratum 23 in the first direction can satisfy the following formula: L'=D1 / λ.

[0088] In addition, the first direction is parallel to the plane where the reference stratum 23 is located and is perpendicular to the extension direction of the first edge a. When the first edge a is a straight edge, the extension direction of the first edge a is parallel to the first edge a. When the first edge a is a wavy edge, the extension direction of the first edge a is consistent with the extension direction of the center line of the wavy edge, wherein the center line of the wavy edge refers to a straight line passing through the middle section of the first edge portion between any adjacent crest points and trough points of the wavy edge, and the middle section of the first edge portion between adjacent crest points and trough points refers to a section whose center point coincides with the center point of the first edge portion and whose length is 1 / 2 or 3 / 5 times the length of the first edge portion, etc., which is not specifically limited here. When the first edge a is an arcuate edge, the extension direction of the first edge a is consistent with the substantially straight extension direction of the first edge a, and the angle between the substantially straight extension direction of the first edge a and any section on the first edge a is less than or equal to a first preset angle, which includes but is not limited to 15°, 20° or 30°, etc., which is not specifically limited here. For some examples, see Figure 7, the first edge a is a straight edge, and the first direction is a direction perpendicular to the first edge a. When the second radiator 142 is fed with a radio frequency signal at the first feeding point 141a, the parasitic resonance frequency band generated by the second radiator 142 is lower than the main resonance frequency band of the first radiator 141. In some embodiments, when the second radiator 142 is fed with a radio frequency signal at the first feeding point 141a, the parasitic resonance frequency band generated by the second radiator 142 is close to the main resonance frequency band of the first radiator 141.

[0089] In this way, by adding the second radiator 142, and making the parasitic resonance frequency band generated by the coupling between the second radiator 142 and the first radiator 141 when the RF signal is fed into the first feeding point 141a lower than the main resonance frequency band of the first radiator 141, the second radiator 142 is further electrically connected to the first edge a of the reference layer 23, and the electrical length of the reference layer 23 in the first direction is 1 / 2 wavelength of the main resonance frequency band of the first radiator 141, that is, the reference layer 23 can be excited to generate a 1 / 2 wavelength characteristic mode along the first direction within the main resonance frequency band of the first radiator 141, so that while the first radiator 141 is excited to resonate, the reference layer 23 is excited through the second radiator 142, so as to improve the radiation efficiency of the antenna 14.

[0090] For some embodiments, please refer to Figure 6-Figure 9 , the second radiator 142 is electrically connected to the first edge a of the reference ground layer 23 through a lumped parameter element 17, and the lumped parameter element 17 includes but is not limited to a capacitor, an inductor, or a circuit obtained by connecting one or both of the inductor and the capacitor in parallel, in series, or in series-parallel. In some embodiments, the lumped parameter element 17 is an inductor, and the inductance value of the inductor can be 18nH. In this way, the electrical length of the second radiator 142 is adjusted by the lumped parameter element 17 to adjust the parasitic resonance frequency band generated by the second radiator 142 when the RF signal is fed into the first feeding point 141a to be lower than the main resonance frequency band of the first radiator 141, while reducing the physical length of the second radiator 142, thereby reducing the length occupied by the antenna 14 on the frame 122.

[0091] The second radiator 142 is electrically connected to the first edge a of the middle plate 121. Specifically, the second radiator 142 can be electrically connected to the middle section of the first edge a of the middle plate 121, or the second radiator 142 can be electrically connected to the end section of the first edge a of the middle plate 121, which is not specifically limited here.

[0092] For some embodiments, please refer to Figure 6 , the second radiator 142 is electrically connected to the middle section of the first edge a of the middle plate 121. The middle section of the first edge a refers to a section on the first edge a that is within a third preset length range from the center point of the first edge a, and the third preset length may be 1 / 4, 1 / 10 or 1 / 8 times the length of the first edge a.

[0093] In some other embodiments, the second radiator 142 is electrically connected to an end section of the first edge a of the middle plate 121. The end section of the first edge a refers to a section on the first edge a that is within a fourth preset length range from the first end M or the second end N of the first edge a. The second end N refers to the end of the first edge a opposite to the first end M. In some embodiments, the fourth preset length may be 1 / 2 times the length of the first edge a. In this way, when the reference stratum 23 is excited by the second radiator 142, the first directional mode (that is, the longitudinal mode) of the reference stratum 23 is sufficiently excited, which can further improve the radiation efficiency of the antenna 14. In some specific embodiments, please refer to Figure 7-Figure 9 , compared with the first gap A, the second gap B is arranged closer to the first end M of the first edge a, and the second radiator 142 is electrically connected to the end section where the first end M of the first edge a is located, and the end section where the first end M is located refers to the section on the first edge a that is within the fourth preset length range from the first end M of the first edge a. Since the distance between the end section where the first end M is located and the second radiator 142 is shorter, the electrical connection path between the second radiator 142 and the end section where the first end M is located is shorter, which is convenient for wiring. When the second radiator 142 is electrically connected to the end section where the first end M of the first edge a is located, for example, refer to Figure 7 , the second radiator 142 is electrically connected to the first end M of the end section where the first end M is located; for example, see Figure 8 The second radiator 142 is electrically connected to the position m1 of the end section where the first end M is located.

[0094] See also Figure 10-12 , Fig.10 Shown Figure 3a , Figure 6 , Figure 7 and Figure 8 The antenna 14 in the electronic device 1 is in a free space (FS) state, generating a radiation efficiency curve comparison diagram of the antenna frequency band B28 (703 MHz to 803 MHz); Fig.11 Shown Figure 3a , Figure 6 and Figure 7 The antenna 14 of the electronic device 1 is in the FS state, generating a radiation efficiency curve comparison diagram of the antenna frequency band B5 (824MHz to 894MHz); Fig.12 Shown Figure 3a , Figure 6 and Figure 7 The antenna 14 of the electronic device 1 is in the FS state, and generates a radiation efficiency curve comparison diagram of the antenna frequency band B8 (880MHz to 960MHz). Figure 3aThe antenna 14 in the electronic device 1 shown, Figure 6 , Figure 7 and Figure 8 The antenna 14 in the electronic device 1 is additionally provided with a second radiator 142 , and the second radiator 142 is electrically connected to the first edge a of the middle board 121 . Figure 6 The second radiator 142 of the antenna 14 in the electronic device 1 is electrically connected to the middle section of the first edge a of the middle board 121. Figure 7 and Figure 8 The second radiator 142 of the antenna 14 in the electronic device 1 is electrically connected to the end section where the first end M of the first edge a of the middle board 121 is located. Figure 10-12 The horizontal axis is frequency (in GHz), and the vertical axis is efficiency (in dB). Figure 10-12 It can be seen that Figure 6 , Figure 7 and Figure 8 The radiation efficiency of the antenna 14 in the electronic device 1 in the FS state generated by the common low-frequency (LB) antenna frequency band (for example, B28, B5 or B8 frequency band) is greater than Figure 3a The antenna 14 in the electronic device 1 shown produces radiation efficiency of a common LB antenna frequency band in the FS state; Figure 7 and Figure 8 The radiation efficiency of the antenna 14 in the electronic device 1 in the FS state is greater than Figure 6 The antenna 14 in the electronic device 1 shown generates radiation efficiency in a common LB antenna frequency band in the FS state.

[0095] In order to increase the application frequency range of the antenna 14, in some embodiments, see Fig.13 , Fig.13 for Figure 1 Another internal structure diagram of the electronic device 1 is shown. In this embodiment, the second radiator 142 has a second grounding point 142b and a second feeding point 142a that are spaced apart. The second grounding point 142b and the second feeding point 142a are not limited to the location on the second radiator 142, as long as the second grounding point 142b and the second feeding point 142a are spaced apart along the second radiator 142. In some embodiments, the second grounding point 142b and the second feeding point 142a are respectively disposed at opposite ends of the second radiator 142 along its own extension direction, for example, please continue to refer to Fig.13, the second grounding point 142b is disposed at one end of the second radiator 142 forming the third slot C, and the second feeding point 142a is disposed at one end of the second radiator 142 forming the second slot B. It can be understood that the second grounding point 142b can also be disposed at one end of the second radiator 142 forming the second slot B, and in this case, the second feeding point 142a is disposed at one end of the second radiator 142 forming the third slot C. In this way, the second radiator 142 forms a CRLH antenna or a loop antenna.

[0096] For some examples, see Fig.14 , Fig.14 for Fig.13 A partial enlarged view of the electronic device 1 shown, the second grounding point 142b is electrically connected to the reference ground layer 23 through the filter 19, that is, the second grounding point 142b is electrically connected to one end of the filter 19, and the other end of the filter 19 is electrically connected to the reference ground layer 23. In some embodiments, the filter 19 is an LC filter, specifically, the filter 19 includes a capacitor C and an inductor L connected in parallel. The filter 19 is used to prevent the signal of the first frequency band from passing through and allow the signal of the second frequency band to pass through. Among them, the first frequency band includes, when the first feeding point 141a feeds the RF signal, the main resonant frequency band generated by the first radiator 141 and the parasitic resonant frequency band generated by the second radiator 142, for example, the first frequency band includes the minimum frequency value in the parasitic resonant frequency band generated by the second radiator 142 when the RF signal is fed to the first feeding point 141a to the maximum frequency value in the main resonant frequency band generated by the first radiator 141 when the RF signal is fed to the first feeding point 141a. For example, when the second radiator 142 is fed with an RF signal at the first feeding point 141a, the parasitic resonance frequency band generated is 700MHz-750MHz, and the minimum frequency value in the frequency band is 700MHz. When the first radiator 141 is fed with an RF signal at the first feeding point 141a, the main resonance frequency band generated is 780MHz-850MHz, and the maximum frequency value in the frequency band is 850MHz. Therefore, the first frequency band includes 700MHz-850MHz. The second frequency band includes the main resonance frequency band generated by the second radiator 142 when the RF signal is fed at the second feeding point 142a. For example, when the second radiator 142 is fed with an RF signal at the second feeding point 142a, the main resonance frequency band generated is 1810MHz-2000MHz, and the second frequency band includes 1810MHz-2000MHz.

[0097] Among them, the first frequency band includes the main resonant frequency band generated by the first radiator 141 and the parasitic resonant frequency band generated by the second radiator 142 when the first feeding point 141a is fed with a radio frequency signal, and the second frequency band includes the main resonant frequency band generated by the second radiator 142 when the second feeding point 142a of the second radiator 142 is fed with a radio frequency signal.

[0098] In some other embodiments, please refer to Fig.15 , Fig.15 for Fig.13 Another partial enlarged view of the electronic device 1 is shown, in which the second grounding point 142b is electrically connected to the reference ground layer 23 through the switch circuit 21, that is, the second grounding point 142b is electrically connected to one end of the switch circuit 21, and the other end of the switch circuit 21 is electrically connected to the reference ground layer 23. The switch circuit 21 can be switched to an off state when a radio frequency signal of the first frequency band is fed into the first feeding point 141a; and is in an open state when a radio frequency signal of the second frequency band is fed into the second feeding point 142a, so as to prevent the signal of the first frequency band from passing through and allow the signal of the second frequency band to pass through. In some embodiments, the switch circuit 21 includes an active switch and a tuning element connected between the active switch and the second grounding point 142b and / or between the active switch and the reference ground layer 23, and the tuning element is an inductor, a capacitor, or a circuit obtained by connecting one or both of the inductor and the capacitor in parallel, in series, or in series-parallel. In other embodiments, please refer to Fig.15 , the switch circuit 21 includes a first switch 211 and a plurality of different first tuning elements 212. The first tuning element 212 includes but is not limited to a capacitor, an inductor, or a circuit obtained by connecting one or both of the inductor and the capacitor in parallel, in series, or in series-parallel connection. The plurality of first tuning elements 212 are electrically connected to the reference ground layer 23. The first switch 211 includes but is not limited to a single-pole multi-throw switch and a multi-pole multi-throw switch. The first switch 211 is used to disconnect the electrical connection path between the second grounding point 142b and the plurality of first tuning elements 212 when the first feeding point 141a feeds a radio frequency signal of the first frequency band; when the second feeding point feeds a radio frequency signal of the second frequency band, the different first tuning elements can be switchably electrically connected to the second grounding point to adjust the resonant frequency band generated by the second radiator 142. In this way, the switch circuit 21 can not only prevent the signal of the first frequency band from passing through and allow the signal of the second frequency band to pass through, but also adjust the working frequency band of the second radiator 142.

[0099] It should be noted that the second grounding point 142b of the present application is not an actual point, and the position where the reference ground layer 23 is electrically connected to the second radiator 142 through the filter 19 or the switch circuit 21 is the second grounding point 142b.

[0100] The electronic device 1 also includes a second RF front end 20, which is electrically connected to the second feeding point 142a of the second radiator 142. The second RF front end 20 is used to feed RF signals to the second radiator 142 or receive external RF signals received by the second radiator 142. In some embodiments, the second RF front end 20 includes a transmitting path and a receiving path. The transmitting path includes devices such as a power amplifier and a filter, and the signal is transmitted to the second radiator 142 after power amplification and filtering by the power amplifier and the filter, and then transmitted to the outside through the second radiator 142; the receiving path includes devices such as a low noise amplifier and a filter, and the external signal received by the second radiator 142 is low-noise amplified, filtered, etc. by the low noise amplifier and the filter, and then transmitted to the RF chip, so that the electronic device 1 communicates with the outside through the second RF front end 20 and the antenna 14. It should be noted that the second feeding point 142a of the present application is not an actual point, and the position where the second RF front end 20 is electrically connected to the second radiator 142 is the second feeding point 142a mentioned in the present application. In some embodiments, the second RF front end 20 is disposed between the middle plate 121 of the middle frame 12 and the back cover 13. In some embodiments, the frequency of the RF signal fed into the second RF front end 20 is within the main resonant frequency band of the second radiator 142.

[0101] In this way, the antenna 1 provided in this embodiment can not only transmit or receive signals in the first frequency band when the RF signal is fed into the first feeding point 141a, but also transmit or receive signals in the second frequency band when the RF signal is fed into the second feeding point 142a. Therefore, the antenna 14 has more application frequency bands and a wider application range.

[0102] In some embodiments, the electronic device 1 is a mobile phone, the length of the middle plate 121 in the longitudinal direction is 150mm±10mm, the width of the middle plate 121 in the transverse direction is 75mm±5mm, the first direction is consistent with the longitudinal direction of the middle plate 121, the shorter edge of the middle plate 121 forms the first edge of the reference stratum 23, the first frequency band is located in the low frequency (low band, LB) band, and the second frequency band is located in the middle / high band (middle / high band, MHB) band. Among them, the LB band can be, for example, 699MHz~960MHz, and the MHB band can be, for example, 1710MHz-2690MHz. In this way, the antenna 14 provided in the embodiment of the present application can cover the low / middle / highband (LMH) band and has a wide range of applications.

[0103] In some other embodiments, the electronic device 1 is a mobile phone, the length of the middle plate 121 in the longitudinal direction is 150 mm ± 10 mm, the width of the middle plate 121 in the transverse direction is 75 mm ± 5 mm, the first direction is consistent with the transverse direction of the middle plate 121, the longer edge of the middle plate 121 forms the first edge of the reference formation 23, the first frequency band is located in the middle / high band (MHB) band, and the second frequency band is located in the LB band.

[0104] exist Figure 13-Figure 15 In the illustrated embodiment, when the first feeding point 141a is fed with an RF signal, the switch circuit 21 or the filter 19 is in a blocking state, the second grounding point 142b of the second radiator 142 is not connected to the reference ground layer 23, and the second radiator 142 is only connected to the first edge a of the reference ground layer 23 through the lumped parameter element 17. At this time, the lumped parameter element 17 is used to adjust the electrical length of the second radiator 142 so that the second radiator 142 excites the first directional mode (such as the longitudinal mode) of the reference ground layer 23. When the second feeding point 142a is fed with an RF signal, the switch circuit 21 or the filter 19 is in a conducting state, the second grounding point 142b of the second radiator 142 is connected to the reference ground layer 23, and the second radiator 142 is also connected to the first edge a of the reference ground layer 23 through the lumped parameter element 17. At this time, the lumped parameter element 17 forms a tuning element of the second radiator 142, which is used to adjust the working frequency band of the second radiator 142.

[0105] The end of the lumped parameter element 17 connected to the second radiator 142 may be connected to the end of the second radiator 142 along its own extension direction, or may be connected to the middle of the second radiator 142 along its own extension direction, which is not specifically limited here. Figure 13-Figure 15 , the lumped parameter element 17 and the second RF front end 20 are both connected to the second feeding point 142a of the second radiator 142. In this way, the lumped parameter element 17 is electrically connected to the end of the second radiator 142, and the lumped parameter element 17 and the second RF front end 20 share a position on the second radiator 142, which can reduce the number of electrical connection points on the second radiator 142, and the structural complexity is low.

[0106] exist Fig.13 In the embodiment shown, the third slot C is disposed on the second side 122b of the frame 122. When the electronic device 1 is held, the third slot C is easily blocked, thereby weakening the medium and high frequency (MHB) radiation performance of the antenna 14 when the RF signal is fed into the second feeding point 142a and causing a resonant frequency shift. Fig.16 , Fig.16 for Fig.13The antenna 14 in the electronic device 1 is shown as a graph of the mid-to-high frequency input return loss coefficient (S11) (that is, the input return loss coefficient at the second feeding point 142a) in the FS state, the beside head hand left (BHHL) state, and the beside head hand right (BHHR) state.

[0107] When Fig.13 When the third gap C, the filter 19 and the switch circuit 21 do not exist in the electronic device 1, Fig.17 Another internal structure diagram of the electronic device 1 is shown. Fig.18 , Fig.18 for Fig.17 The graph shows a mid-high frequency input return loss coefficient (S11) of the antenna 14 in the electronic device 1 in the FS state, the BHHL state and the BHHR state. Fig.16 and Fig.18 The horizontal axis is frequency (in GHz), and the vertical axis is S11 (in dB). Fig.16 and Fig.18 It can be concluded that Fig.13 The antenna 14 in the electronic device 1 has a small mid-high frequency resonant frequency offset in the FS state, the BHHL state, and the BHHR state, and when the electronic device 1 is held in the hand, the mid-high frequency radiation performance of the antenna 14 is less affected. Fig.19 , Fig.19 for Fig.13 and Fig.17 The figure shows a comparison of mid- and high-frequency radiation efficiency curves of the antenna 14 in the electronic device in the FS state, the BHHL state, and the BHHR state. Fig.19 The horizontal axis is the frequency (in GHz), and the vertical axis is the radiation efficiency (in dB). Fig.19 It can be seen that Fig.13 The mid-high frequency radiation efficiency of the antenna 14 in the electronic device 1 in the FS state, the BHHL state and the BHHR state is greater than Fig.17 The antenna 14 in the electronic device 1 shows the mid-high frequency radiation efficiency in the FS state, the BHHL state, and the BHHR state. Fig.13 The antenna 14 in the electronic device 1 shown can be put into practical application, and has excellent radiation performance at medium and high frequencies.

[0108] In order to further increase the number of radiation frequency bands of the antenna 14, in some embodiments, see Fig. 20 , Fig. 20 for Figure 1Another schematic diagram of the internal structure of the electronic device 1 is shown. In this embodiment, a portion of the frame 122 located on a side of the third slot C away from the second slot B and adjacent to the third slot C forms a third radiator 144, that is, the third radiator 144 and the second radiator 142 are respectively located on both sides of the third slot C. There is a gap 16 between the third radiator 144 and the middle plate 121. For example, the second radiator 142 is formed on the frame 122 on one side of the third slot C, and the third radiator 144 is formed on the frame 122 on the other side of the third slot C. The third radiator 144 can couple with the second radiator 142 to generate parasitic resonance when the radio frequency signal is fed into the second feeding point 142a, thereby further increasing the number of radiation frequency bands of the antenna 14.

[0109] For some examples, see Fig.21 , Fig.21 for Figure 1 1 is another schematic diagram of the internal structure of the electronic device 1. In this embodiment, the third radiator 144 has a third grounding point 144b and a third feeding point 144a which are arranged at intervals. The third grounding point 144b is electrically connected to the reference ground layer 23. In some embodiments, see Fig.21 The third grounding point 144b is connected to other parts of the frame 122b to be electrically connected to the middle plate 121 (that is, the reference ground layer 23) through other parts of the frame 122 to achieve grounding. The electronic device 1 also includes a third RF front end 22, which is electrically connected to the third feeding point 144a.

[0110] For some examples, see Fig. 22 , Fig. 22 for Figure 1Another internal structure schematic diagram of the electronic device 1 is shown. In this embodiment, the third radiator 144 has a connection point 144c. In some embodiments, the connection point 144c and the third grounding point 144b are respectively located on both sides of the third feeding point 144a. Specifically, the connection point 144c is located at one end of the third radiator 144 adjacent to the third slit C. The connection point 144c is electrically connected to the reference ground layer 23 through the switching circuit 24. The switching circuit 24 includes a second switching switch 241 and a plurality of different second tuning elements 242. The second tuning element 242 includes but is not limited to a capacitor, an inductor, or a circuit obtained by connecting one or both of the inductor and the capacitor in parallel, in series, or in series-parallel connection. The plurality of second tuning elements 242 are electrically connected to the reference ground layer 23. The second switching switch 241 includes but is not limited to a single-pole multi-throw switch and a multi-pole multi-throw switch. The second switching switch 241 is used to switchably connect different second tuning elements 242 to the connection point 144c electrically to adjust the resonant frequency of the third radiator 144. Specifically, the switching circuit 24 is used to tune the resonant frequency of the portion between the third ground point 144b and the third gap C on the third radiator 144. It should be noted that the connection point 144c of the present application is not an actual point, and the location where the switching circuit 24 is electrically connected to the third radiator 144 is the connection point 144c.

[0111] On the basis of the above embodiment, optionally, when the second radiator 143 is grounded through the switching circuit 21, the first switching switch 211 in the switching circuit 21 and the second switching switch 241 in the switching circuit 24 are packaged together, and the switching circuit of the overall switch formed after the packaging is the superposition of the switching circuit of the first switching switch 211 and the switching circuit of the second switching switch 241, thereby reducing the number of components included in the electronic device and helping to simplify the assembly process of the electronic device.

[0112] In the description of this specification, specific features, structures, materials or characteristics may be combined in an appropriate manner in any one or more embodiments or examples.

[0113] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit it. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. An electronic device, characterized in that: include: A reference stratum, the reference stratum having a first edge and a second edge and a third edge respectively connected to two ends of the first edge; a first radiator, wherein the first radiator has a first grounding point and a first feeding point which are spaced apart from each other, the first grounding point is electrically connected to the reference ground layer, and the first feeding point is used to feed the first radiator; a second radiator, the second radiator being spaced apart from the first radiator, the second radiator being electrically connected to a first edge of the reference ground layer, or an end section of the second edge connected to the first edge, or an end section of the third edge connected to the first edge, the electrical length of the reference ground layer in a first direction being 1 / 2 wavelength of a main resonant frequency band of the first radiator, the first direction being parallel to a plane where the reference ground layer is located and being perpendicular to an extension direction of the first edge of the reference ground layer, and a parasitic resonant frequency band generated by the second radiator when a radio frequency signal is fed into the first feeding point is lower than a main resonant frequency band generated by the first radiator when a radio frequency signal is fed into the first feeding point; The electronic device is a mobile phone, and the mobile phone includes a conductive middle plate, and the middle plate forms the reference ground layer.

2. The electronic device according to claim 1, characterized in that: The second radiator is electrically connected to an end section of the first edge of the reference ground layer.

3. The electronic device according to claim 1 or 2, characterized in that: The second radiator is electrically connected to the first edge of the reference ground layer, an end section of the second edge connected to the first edge, or an end section of the third edge connected to the first edge through a lumped parameter element.

4. The electronic device according to claim 3, characterized in that: The lumped parameter element is an inductor, a capacitor, or a circuit obtained by connecting one or two of the inductors and capacitors in parallel, in series, or in series-parallel connection.

5. The electronic device according to any one of claims 1 to 4, characterized in that: The second radiator has a second feeding point and a second grounding point which are spaced apart from each other, the second feeding point is used to feed the second radiator, the second grounding point is electrically connected to the reference ground layer through a filter or a switch circuit, the filter and the switch circuit are used to prevent signals of the first frequency band from passing through and allow signals of the second frequency band to pass through, wherein, The first frequency band includes the minimum frequency value in the parasitic resonant frequency band generated by the second radiator when the RF signal is fed into the first feeding point to the maximum frequency value in the main resonant frequency band generated by the first radiator when the RF signal is fed into the first feeding point, and the second frequency band includes the main resonant frequency band generated by the second radiator when the RF signal is fed into the second feeding point.

6. The electronic device according to claim 5, characterized in that: The filter is an LC filter.

7. The electronic device according to claim 5, characterized in that: The switch circuit includes a first switch and a plurality of different first tuning elements, wherein the plurality of first tuning elements are electrically connected to the reference ground layer; The first switch is used to disconnect the electrical connection path between the second ground point and the plurality of first tuning elements when the first feeding point is fed with the radio frequency signal of the first frequency band; When the second feeding point is fed with a radio frequency signal of the second frequency band, different first tuning elements can be switchably electrically connected to the second ground point to adjust the resonant frequency band generated by the second radiator.

8. The electronic device according to any one of claims 5 to 7, characterized in that: One of the first frequency band and the second frequency band is located in a low frequency band, and the other of the first frequency band and the second frequency band is located in a mid-high frequency band.

9. The electronic device according to any one of claims 1 to 8, characterized in that: The first edge of the middle plate forms the first edge of the reference stratum, the second edge of the middle plate forms the second edge of the reference stratum, the third edge of the middle plate forms the third edge of the reference stratum, and two ends of the first edge of the middle plate are respectively connected to the second edge of the middle plate and the third edge of the middle plate; The electronic device further comprises: A conductive frame, wherein the frame is arranged around the edge of the middle plate, the frame includes a first side, the first side is arranged around the first edge of the middle plate, the frame has at least a first gap, a second gap and a third gap, the first gap and the second gap are located on the first side, a portion of the frame located on one side of the first gap and adjacent to the first gap forms the first radiator, the third gap and the first radiator are respectively located on both sides of the first gap, the second gap and the first gap are the same gap or the second gap is located between the third gap and the first gap, a portion of the frame located between the second gap and the third gap forms the second radiator, and there is a gap between the first radiator and the middle plate and between the second radiator and the middle plate.

10. The electronic device according to claim 9, characterized in that: The second gap is located between the third gap and the first gap, and a portion of the frame located between the first gap and the second gap forms a suspended conductor. The electronic device further includes: A USB device is located inside the suspension conductor and is arranged close to the suspension conductor.

11. The electronic device according to claim 9 or 10, characterized in that: The first gap and the second gap are symmetrically arranged about a center point of the first side.

12. The electronic device according to any one of claims 9 to 11, characterized in that: The first edge of the middle plate has a first end; A distance between the first end and the first slot in the extending direction of the first side is greater than a distance between the first end and the second slot in the extending direction of the first side, and the second radiator is electrically connected to an end section where the first end is located.

13. The electronic device according to claim 12, characterized in that: The first end is connected to the second edge of the middle plate; The frame also has a second side, the second side is arranged around the second edge of the middle plate, and the third gap is arranged on the second side.

14. The electronic device according to claim 13, characterized in that: The second radiator includes an intersecting first section and a second section, the first section is located between the second gap and the second section, the second section is located between the first section and the third gap, and the length of the second section is less than or equal to 1 / 4 times the length of the second side.

15. The electronic device according to any one of claims 12 to 14, characterized in that: The first edge of the middle plate also has a second end opposite to the first end, and the second end is connected to the third edge of the middle plate; The frame also has a third side, which is arranged around the third edge of the middle plate. The frame also has a fourth gap, which is arranged on the third side. The portion of the frame located between the first gap and the fourth gap forms the first radiator.

16. The electronic device according to claim 15, characterized in that: The first radiator includes an intersecting third section and a fourth section, the third section is located between the first gap and the fourth section, the fourth section is located between the third section and the fourth gap, and the length of the fourth section is less than or equal to 1 / 2 times the length of the third side.

17. The electronic device according to any one of claims 9 to 16, characterized in that: A portion of the frame adjacent to the third slit forms a third radiator, the third radiator and the second radiator are respectively located on both sides of the third slit, and there is a gap between the third radiator and the middle plate; The third radiator has a third grounding point and a third feeding point which are arranged at intervals. The third grounding point is electrically connected to the reference ground layer. The third feeding point is used to feed the third radiator.

18. The electronic device according to claim 17, characterized in that: The third radiator further has a connection point, the electronic device further comprises a switching circuit, the switching circuit comprises a second switching switch and a plurality of different second tuning elements, the plurality of second tuning elements are electrically connected to the reference ground layer; The second switch is used to switchably electrically connect different second tuning elements to the connection point to adjust the resonant frequency of the third radiator.

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