Electronic equipment

Abstract

The invention provides electronic equipment, relates to the technical field of electronic equipment, and can improve the radiation efficiency of an antenna in the electronic equipment. The electronic equipment comprises a reference ground layer, a first radiator and a second radiator. The reference ground layer is provided with a first edge, a second edge and a third edge, the first radiator is provided with a first grounding point and a first feeding point which are arranged at an interval, and the first grounding point is electrically connected with a 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 with the first edge or the end section of the third edge connected with the first edge, and the electrical length of the reference ground layer in the first direction is 1 / 2 wavelength of the main resonance frequency band of the first radiator; and a parasitic resonance frequency band generated by the second radiator when a radio frequency signal is fed in at the first feeding point is lower than a main resonance frequency band generated by the first radiator when the radio frequency signal is fed in at the first feeding point. The electronic equipment provided by the invention is used for the communication system.

Description

[0001] This application is a divisional application. The application number of the original application is 202011507812.7, the filing date of the original application is December 18, 2020, and the entire content of the original application is incorporated herein by reference. Technical Field

[0002] This application relates to the technical field of electronic devices, and in particular, to an electronic device. Background Art

[0003] Currently, the design of the antenna solution of an electronic device generally uses a metal frame, a metal radiator provided on the inner surface of a non-metal frame, or a metal radiator embedded inside a non-metal material to achieve the communication function. However, with the popularity of large screens such as curved screens, the size of the frame of the electronic device in the thickness direction of the electronic device becomes 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 ability becomes worse and worse. Therefore, the radiation efficiency of the antenna is relatively low. Summary of the Invention

[0004] Embodiments of this application provide an electronic device that can improve the radiation efficiency of the antenna inside the electronic device.

[0005] To achieve the above object, some embodiments of this application provide an electronic device, which includes a reference ground plane, a first radiator, and a second radiator. The reference ground plane has a first edge, a second edge, and a third edge that are respectively connected to two ends of the first edge; the first radiator has a first grounding point and a first feeding point that are spaced apart, the first grounding point is electrically connected to the reference ground plane, and the first feeding point is used to feed the first radiator; the second radiator is spaced apart from the first radiator, and the second radiator is electrically connected to the first edge of the reference ground plane, 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 ground plane can be excited to have a 1 / 2 wavelength eigenmode along a first direction within the main resonance frequency band of the first radiator, that is, the electrical length of the reference ground plane in the first direction is 1 / 2 wavelength of the main resonance frequency band of the first radiator. The first direction is parallel to the plane where the reference ground plane is located and perpendicular to the extending direction of the first edge of the reference ground plane. The parasitic resonance frequency band generated when the second radiator feeds a radio frequency signal at the first feeding point is lower than the main resonance frequency band generated when the first radiator feeds a radio frequency signal at the first feeding point.

[0006] In the above technical solution, by adding a second radiator, and making the parasitic resonance frequency band generated by the coupling of the second radiator and the first radiator when the second radiator is fed with a radio frequency signal at the first feeding point lower than the main resonance frequency band of the first radiator, and further connecting the second radiator to the first edge of the reference ground plane, and enabling the reference ground plane to be excited with a 1 / 2 wavelength eigenmode along the first direction within the main resonance frequency band of the first radiator, that is, the electrical length of the reference ground plane in the first direction is 1 / 2 wavelength of the main resonance frequency band of the first radiator, so as to excite the reference ground plane through the second radiator while exciting the first radiator to generate resonance, thereby improving the radiation efficiency of the antenna.

[0007] In a possible implementation manner, the parasitic resonance frequency band generated by the second radiator when fed with a radio frequency signal at the first feeding point is close to the main resonance frequency band generated by the first radiator when fed with a radio frequency signal at the first feeding point.

[0008] In a possible implementation manner, the second radiator is electrically connected to an end section of the first edge of the reference ground plane, where the end section of the first edge refers to a section on the first edge 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 ground plane is excited by the second radiator, the first direction mode is well excited, and the radiation efficiency of the antenna can be further improved.

[0009] In a possible implementation manner, the second radiator is electrically connected to the first edge of the reference ground plane, the end section of the second edge adjacent to the first edge, or the end section of the third edge adjacent to the first edge through a lumped parameter element. In this way, by adjusting the electrical length of the second radiator through the lumped parameter element, while adjusting the parasitic resonance frequency band generated by the second radiator when fed with a radio frequency signal at the first feeding point to be lower than the main resonance frequency band of the first radiator, the physical length of the second radiator is reduced, thereby reducing the occupied length of the antenna on the frame.

[0010] In a possible implementation manner, the lumped parameter element is an inductor, a capacitor, or a circuit obtained by parallel connection, series connection, or series-parallel connection of one or two of an inductor and a capacitor.

[0011] In a possible implementation, the second radiator has a second feeding point and a second grounding point which are spaced apart. The second feeding point is used to feed the second radiator, and the second grounding point is electrically connected to a reference ground plane through a filter or a switching circuit. The filter and the switching circuit are used to block signals in a first frequency band from passing through and allow signals in a second frequency band to pass through. Here, the first frequency band includes the minimum frequency value within the parasitic resonance frequency band generated when a radio frequency signal is fed into the second radiator at the first feeding point to the maximum frequency value within the main resonance frequency band generated when a radio frequency signal is fed into the first radiator at the first feeding point. The second frequency band includes the main resonance frequency band generated when a radio frequency signal is fed into the second radiator at the second feeding point. In this way, in addition to being able to transmit or receive signals in the first frequency band when a radio frequency signal is fed into the first feeding point, the antenna provided in this embodiment can also transmit or receive signals in the second frequency band when a radio frequency signal is fed into the second feeding point. Therefore, the antenna has a relatively wide application frequency band and a wide application range.

[0012] In a possible implementation, the filter is an LC filter.

[0013] In a possible implementation, the switching circuit includes a first switching switch and a plurality of different first tuning elements. The plurality of first tuning elements are electrically connected to the reference ground plane. The first switching switch is used to disconnect the electrical connection path between the second grounding point and the plurality of first tuning elements when a radio frequency signal in the first frequency band is fed into the first feeding point. When a radio frequency signal in the second frequency band is fed into the second feeding point, the first switching switch can switchably connect different first tuning elements to the second grounding point to adjust the resonance frequency band generated by the second radiator. In this way, the switching circuit can not only achieve the purpose of blocking signals in the first frequency band from passing through and allowing signals in the second frequency band to pass through, but also adjust the operating frequency band of the second radiator.

[0014] In a possible implementation, the electronic device is a mobile phone. The length of the middle plate along the longitudinal direction is 150 mm ± 10 mm, and the width of the middle plate along 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 ground plane. The first frequency band is located within the low frequency band, and the second frequency band is located within the middle and high frequency bands. In this way, the antenna provided in the embodiment of the present application can cover the low, middle, and high (LMH) frequency bands, and has a wide application range.

[0015] In a possible implementation, the electronic device is a mobile phone. The length of the middle plate along the longitudinal direction is 150 mm ± 10 mm, and the width of the middle plate along 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 ground plane. The first frequency band is located within the MHB frequency band, and the second frequency band is located within the LB frequency band.

[0016] In a possible implementation, the electronic device further includes a conductive middle plate and a conductive frame; the middle plate has a first edge, a second edge and a third edge respectively connected to both ends of the first edge, the middle plate forms a reference ground layer, the first edge of the middle plate forms the first edge of the reference ground layer, the second edge of the middle plate forms the second edge of the reference ground layer, and the third edge of the middle plate forms the third edge of the reference ground layer; the frame is disposed around the edge of the middle plate for one week, the frame includes a first side, the first side is disposed 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 part 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 respectively located on both sides of the first gap, the second gap is the same gap as the first gap or the second gap is located between the third gap and the first gap, a part of the frame located between the second gap and the third gap forms a second radiator, and there is a gap 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.

[0017] In a possible implementation, the second gap is located between the third gap and the first gap, a part of the frame located between the first gap and the second gap forms a floating conductor, and the electronic device further includes: a USB device, which is located inside the floating conductor and is disposed against the floating conductor. Since the USB device is usually disposed near the bottom edge of an electronic device such as a mobile phone or a tablet computer, an antenna located at the bottom edge of the electronic device can be constructed, and the radiation efficiency of the antenna located at the bottom edge of the electronic device can be increased.

[0018] In a possible implementation, the first gap and the second gap are symmetrically disposed about the center point of the first side. In this way, the aesthetics of the electronic device can be improved.

[0019] In a possible implementation, the first gap, the second gap and the third gap are filled with a dielectric material to ensure the structural integrity of the frame.

[0020] In a possible implementation, the gap is filled with a dielectric material to ensure the structural integrity of the middle frame.

[0021] 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 gap in the extending direction of the first side is greater than the distance between the first end of the first edge and the second gap in the extending direction of the first side, 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 the section on the first edge 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 short, the electrical connection path between the second radiator and the end section where the first end is located is short, which is convenient for wiring.

[0022] 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 side, the second side surrounds the second edge of the middle plate, and a third gap is provided on the second side.

[0023] In a possible implementation, 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 of the length of the second side.

[0024] In a possible implementation, the first edge of the middle plate further has a second end opposite to the first end, the second end of the first edge is connected to the third edge of the middle plate; the frame further has a third side, the third side surrounds the third edge of the middle plate, the frame further has a fourth gap, the fourth gap is provided on the third side, and the part of the frame between the first gap and the fourth gap forms a first radiator.

[0025] 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 of the length of the third side.

[0026] In a possible implementation, the part of the frame adjacent to the third gap forms a third radiator, the third radiator and the second radiator are respectively located on both sides of the third gap, 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 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.

[0027] In a possible implementation, the third radiator further has a connection point, and 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 a reference ground plane; the second switching switch is configured to switchably electrically connect different second tuning elements to the connection point to adjust the resonance frequency of the third radiator. In this way, the resonance frequency of the third radiator is tuned by the switching circuit to further increase the coverage frequency band of the antenna.

[0028] In a possible implementation, the first switching switch in the switching circuit and the second switching switch in the switching circuit are packaged together. The switching circuit of the overall package formed is the superposition of the switching circuit of the first switching switch and the switching circuit of the second switching switch. Thereby, the number of components included in the electronic device can be reduced, which is beneficial to simplifying the assembly process of the electronic device. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 The front view of the electronic device provided by some embodiments of the present application;

[0030] Figure 2 is Figure 1 the exploded view of the electronic device shown;

[0031] Figure 3a is Figure 1 a schematic diagram of an internal structure of the electronic device shown;

[0032] Figure 3b is Figure 3a a schematic diagram of the structure formed after the first feeding point is arranged close to the first grounding point in the electronic device shown;

[0033] Figure 4a is Figure 1 another schematic diagram of an internal structure of the electronic device shown;

[0034] Figure 4b is Figure 4a a schematic diagram of the structure formed after the first feeding point is arranged close to the first grounding point in the electronic device shown;

[0035] Figure 5 The perspective view of the electronic device with a curved screen provided by some embodiments of the present application;

[0036] Figure 6 is Figure 1 another schematic diagram of an internal structure of the electronic device shown;

[0037] Figure 7 is Figure 1 another schematic diagram of an internal structure of the electronic device shown;

[0038] Figure 8Another internal structure schematic diagram of the electronic device shown; Figure 1 Another internal structure schematic diagram of the electronic device shown;

[0039] Figure 9 Another internal structure schematic diagram of the electronic device shown; Figure 1 Another internal structure schematic diagram of the electronic device shown;

[0040] Figure 10 Shown is Figure 3a , Figure 6 , Figure 7 and Figure 8 A comparison chart of the radiation efficiency curves of the antenna frequency band generating B28 (703 MHz to 803 MHz) in the free space (FS) state of the electronic device shown;

[0041] Figure 11 Shown is Figure 3a , Figure 6 and Figure 7 A comparison chart of the radiation efficiency curves of the antenna frequency band generating B5 (824 MHz to 894 MHz) in the FS state of the electronic device shown;

[0042] Figure 12 Shown is Figure 3a , Figure 6 and Figure 7 A comparison chart of the radiation efficiency curves of the antenna frequency band generating B8 (880 MHz to 960 MHz) in the FS state of the electronic device shown;

[0043] Figure 13 Another internal structure schematic diagram of the electronic device shown; Figure 1 Another internal structure schematic diagram of the electronic device shown;

[0044] Figure 14 A partial enlarged view of the electronic device shown; Figure 13 A partial enlarged view of the electronic device shown;

[0045] Figure 15 Another partial enlarged view of the electronic device shown; Figure 13 Another partial enlarged view of the electronic device shown;

[0046] Figure 16 The mid - high frequency input return loss coefficient curve graph of the antenna in the FS state, beside head hand left (BHHL) state, and beside head hand right (BHHR) state of the electronic device shown; Figure 13 The mid - high frequency input return loss coefficient curve graph of the antenna in the FS state, beside head hand left (BHHL) state, and beside head hand right (BHHR) state of the electronic device shown;

[0047] Figure 17 Another internal structure schematic diagram of the electronic device 1 shown; Figure 1 Another internal structure schematic diagram of the electronic device 1 shown;

[0048] Figure 18 The Figure 17 graph of the mid - high frequency input return loss coefficient of the antenna in the electronic device shown in the FS state, BHHL state, and BHHR state;

[0049] Figure 19 The Figure 13 and Figure 17 comparative graph of the mid - high frequency radiation efficiency of the antenna in the electronic device shown in the FS state, BHHL state, and BHHR state;

[0050] Figure 20 The Figure 1 schematic diagram of another internal structure of the electronic device shown;

[0051] Figure 21 The Figure 1 schematic diagram of another internal structure of the electronic device shown;

[0052] Figure 22 The Figure 1 schematic diagram of another internal structure of the electronic device shown.

[0053] Reference numerals:

[0054] 1 - Electronic device; 11 - Display screen; 12 - Middle frame; 121 - Middle plate; 122 - Frame; 122a - First side; 122b - Second side; 122c - Third side; 122d - Fourth side; 13 - Back cover; 14 - Antenna; 15 - First radio frequency 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 - Suspended 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 radio frequency front - end; 144 - Third radiator; 144b - Third grounding point; 144a - Third feeding point; 144c - Connection point; 22 - Third radio frequency front - end; 24 - Switching circuit; 241 - Second switching switch; 242 - Second tuning element. Detailed implementation manners

[0055] In the embodiments of the present application, the terms "first", "second", and "third" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first", "second", and "third" may explicitly or implicitly include one or more of such features.

[0056] It should be noted that in the embodiments of the present application, the term "comprising", "including" or any other variation thereof is intended to cover non-exclusive inclusion, such that a process, method, article or device comprising a series of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article or device. Without further limitation, an element defined by the phrase "comprising a..." does not exclude the presence of additional identical elements in the process, method, article or device comprising such element.

[0057] 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 computer, a tablet computer, a smaller device such as a mobile phone, a watch, a pendant device or other wearable or micro devices, a cellular phone, a media player, etc.

[0058] Please refer to Figure 1 and Figure 2 , Figure 1 , which is the front view of the electronic device 1 provided in some embodiments of the present application. Figure 2 is Figure 1 the exploded view of the electronic device 1 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.

[0059] The display screen 11 is used to display images, videos, etc. The display screen 11 may adopt a flexible display screen or a rigid display screen. For example, the display screen 11 may be an organic light-emitting diode (OLED) display screen, an active-matrix organic light-emitting diode (AMOLED) display screen, a mini organic light-emitting diode display screen, a micro organic light-emitting diode display screen, a micro organic light-emitting diode display screen, a quantum dot light emitting diodes (QLED) display screen, a liquid crystal display (LCD).

[0060] The back cover 13 forms the rear housing of the electronic device 1. The back cover 13 is used to protect the electronic components inside the electronic device 1 from water and dust, and to ensure the appearance neatness of the electronic device 1. The material for forming the back cover 13 can be a conductive material such as metal, or a non-conductive material such as glass or plastic. When the material for forming the back cover 13 is a conductive material such as metal, the back cover 13 can be used as the reference ground for the electronic components or radio frequency components inside the electronic device.

[0061] 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 (the Z direction shown in the figure). The material for forming the middle plate 121 is a conductive material such as metal. The middle plate 121 has an approximately rectangular plate-like structure. The middle plate 121 has opposite first edges a and fourth edges d, and opposite second edges b and third edges c. The first edge a and the fourth edge d are respectively the two shorter edges of the middle plate 121, and the second edge b and the third edge c are respectively the 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 the two longer edges of the middle plate 121. In this case, the second edge b and the third edge c are respectively the two shorter edges of the middle plate 121. The length l of the middle plate 121 in the extending direction of the two longer edges is 150 mm ± 10 mm, and the width w of the middle plate 121 in the extending 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).

[0062] The frame 122 is disposed around the edge of the middle plate 121 for one week. 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 disposed around the first edge a, the second side 122b is disposed around the second edge b, the third side 122c is disposed around the third edge c, and the fourth side 122d is disposed 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 has a square plate-like structure, that is, the frame 122 is square. The material for forming the frame 122 can be a conductive material such as metal, or a non-conductive material such as plastic or resin.

[0063] Please refer to Figure 3a , Figure 3a for Figure 1 a schematic diagram of an internal structure of the electronic device 1 shown. The electronic device 1 further includes an antenna 14, a first radio frequency front end 15, and a reference ground layer 23.

[0064] 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 communication between the electronic device 1 and the outside world can be achieved through the antenna 14. In some embodiments, please continue to refer to Figure 3a , the forming material of the frame 122 is a conductive material such as metal. The frame 122 has a first slit A, and a part of the frame 122 located on one side of the first slit A and adjacent to the first slit A forms the first radiator 141. Specifically, the structural form of the first radiator 141 can include the following two implementation manners:

[0065] The first implementation manner: Please continue to refer to Figure 3a , the frame 122 further has a fourth slit D, and a part of the frame 122 located between the first slit A and the fourth slit D forms the first radiator 141. In some embodiments, the first slit A is disposed on the first side 122a, the fourth slit D is disposed on the third side 122c, the first radiator 141 includes an intersecting third section 1411 and a fourth section 1412, the third section 1411 is located between the first slit A and the fourth section 1412, the third section 1411 surrounds the first edge a of the middle plate 121, the fourth section 1412 is located between the third section 1411 and the fourth slit D, and the fourth section 1412 surrounds 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 slit A and the fourth slit D can also be both disposed on the first side 122a, and no specific limitation is made here.

[0066] The second implementation manner: Please refer to Figure 4a , Figure 4a is Figure 1 Another internal structure schematic diagram of the electronic device 1 shown. In this embodiment, one end of the first radiator 141 away from the first slit A is connected to other parts of the frame 122. Among them, one end of the first radiator 141 away from the first slit A means the end of the first radiator 141 that is the farthest from the first slit A along the extension direction of the first radiator 141 (corresponding to Figure 4a the K end in). In some embodiments, the first slit A is disposed on the first side 122a, and the part where the first radiator 141 is connected to other parts of the frame 122 (that is, the K end) is located on the third side 122c. The first radiator 141 includes an intersecting third section 1411 and a fourth section 1412. The third section 1411 is located between the first slit A and the fourth section 1412. The third section 1411 surrounds the first edge a of the middle plate 121. The fourth section 1412 is located between the third section 1411 and the K end. The fourth section 1412 surrounds the third edge c of the middle plate 121.

[0067] In the above first implementation manner and second implementation manner, the first gap A and the fourth gap D can be filled with a dielectric material 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, 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 other parts of the frame 122 except the first radiator 141 serve as the radiator of the antenna of the electronic device, there is also a gap 16 between 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 can be filled with a dielectric material to ensure the structural integrity of the middle frame 12.

[0068] It can be understood that when the forming material of the frame 122 is a non-conductive material such as plastic or resin, the frame 122 cannot form the first radiator 141. The first radiator 141 can be disposed inside the frame 122 or embedded inside the frame 122. The frame 122 has a first frame segment, and the first radiator 141 is disposed adjacent to or embedded inside the first frame segment. It should be noted that the first radiator 141 disposed adjacent to the first frame segment as mentioned in this application means that the first radiator 141 can be disposed closely adjacent to the first frame segment or can be disposed 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 provide the first gap A and the fourth gap D on the frame 122, which can ensure the structural integrity of the frame 122. In this embodiment, the structural form of the first radiator 141 can be in the form of a flexible printed circuit (FPC), laser-direct-structuring (LDS) form or mode decoration antenna (MDA) form, which is not specifically limited herein.

[0069] The first radiator 141 has a first feeding point 141a and a first grounding point 141b that are spaced apart.

[0070] The reference ground layer 23 is electrically connected to the first grounding point 141b of the first radiator 141. In some embodiments, the reference ground layer 23 is formed by the middle plate 121. It can be understood 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 grounding point 141b through a connecting member such as a shrapnel or a wire. In some other embodiments, please continue to refer to Figure 4a , the first grounding point 141b of the first radiator 141 is the end K of the first radiator 141. The reference ground layer 23 is connected to the end K of the first radiator 141 through the frame 122 to achieve a grounding connection. It should be noted that the first grounding point 141b in this application is not an actual existing point. The position where the reference ground layer 23 is electrically connected to the first radiator 141 through a grounding member or a part of the frame 122 is the first grounding point 141b.

[0071] The first radio frequency front end 15 is electrically connected to the first feeding point 141a of the first radiator 141. The first radio frequency front end 15 is used to feed a radio frequency signal into the first radiator 141 and / or receive the radio frequency signal from the outside received by the first radiator 141. In some embodiments, the first radio frequency front end 15 includes a transmitting path and a receiving path. The transmitting path includes devices such as a power amplifier and a filter. The signal is processed such as power amplification and filtering through the power amplifier, filter and other devices and then transmitted to the first radiator 141, 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. The outside signal received by the first radiator 141 is processed such as low noise amplification and filtering through the low noise amplifier, filter and other devices and then transmitted to the radio frequency chip, so as to realize the communication between the electronic device 1 and the outside through the first radio frequency front end 15 and the antenna 14. It should be noted that the first feeding point 141a in this application is not an actual existing point. The position where the first radio frequency front end 15 is electrically connected to the first radiator 141 is the first feeding point 141a mentioned in this application. In some embodiments, the first radio frequency 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 radio frequency signal fed by the first radio frequency front end 15 is within the main resonance frequency band of the first radiator 141.

[0072] In the embodiments of this application, the setting positions of the first feeding point 141a and the first grounding point 141b on the first radiator 141 are not specifically limited, as long as the first feeding point 141a and the first grounding point 141b are spaced apart along the extending direction of the first radiator 141.

[0073] In some embodiments, please refer to Figure 3a, the first feeding point 141a is located between the first grounding point 141b and the first slot A. For example, the first feeding point 141a is disposed close to the first slot A. That is to say, the distance between the first feeding point 141a and the first slot A in the extending 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 extending direction of the first radiator 141 is defined as the second distance, and the first distance is less than the second distance. The part of the first radiator 141 located between the first slot A and the first grounding point 141b forms a composite right / left-handed (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 on the premise that the first feeding point 141a is disposed between the first grounding point 141b and the first slot A, if the first feeding point 141a is disposed close to the first grounding point 141b, that is to say, the first distance is greater than the second distance, please refer to Figure 3b , Figure 3b is Figure 3a the schematic structural diagram formed after the first feeding point 141a of the electronic device 1 shown in Figure 3a is disposed close to the first grounding point 141b. In this embodiment, the part of the first radiator 141 located between the first slot A and the first grounding point 141b forms 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 may also be located on the side of the first grounding point 141b close to the fourth slot D, that is to say, the first feeding point 141a is located between the first grounding point 141b and the fourth slot D.

[0074] Similarly, please refer to Figure 4a , the first feeding point 141a is disposed close to the first slot A. That is to say, the distance between the first feeding point 141a and the first slot A in the extending 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 extending direction of the first radiator 141 is defined as the second distance, and the first distance is less than the second distance. In this way, the first radiator 141 forms 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 may also be disposed close to the first grounding point 141b, that is to say, the first distance is greater than the second distance, please refer to Figure 4b , Figure 4b is Figure 4aSchematic diagram of the structure formed after the first feeding point 141a in the electronic device 1 shown is arranged close to the first grounding point 141b. In this embodiment, the portion of the first radiator 141 located between the first slot A and the first grounding point 141b constitutes an IFA antenna, and the resonant frequency band of this IFA antenna is the main resonant frequency band of the first radiator 141.

[0075] In the embodiment of the present application, the antenna in the electronic device 1 uses a conductive frame 122, a conductive radiator provided on the inner side of the non-conductive frame 122, or a conductive radiator embedded inside the non-conductive frame 122 to achieve signal transmission or reception. With the popularity of large screens such as curved screens, at least two opposite edges of the display screen 11 bend towards the back cover 13 to form an electronic device with a curved screen. Exemplarily, please refer to FIG. 5, Figure is a three-dimensional view of the electronic device 1 with a curved screen provided in some embodiments of the present application. In this embodiment, the edges of the display screen 11 ( ​ only two opposite edges are shown, and it can also be four peripheral edges) bend towards the back cover 13. In this way, on the premise of ensuring that the thickness of the electronic device 1 remains unchanged, the dimension of the frame 122 in the thickness direction of the electronic device 1 (that is, the direction Z, the direction Z is perpendicular to the direction X, and the direction Z is also perpendicular to the direction Y) (that is, ​ d1 in) is smaller, and the two bent portions of the display screen 11 will form an occlusion to the frame 122 along the thickness direction of the electronic device 1 (that is, ​ the Z direction in), or cause the frame 122 to be projected onto the display screen 11 in the thickness direction (that is, on the positive projection area of the display screen 11 on the XY plane). Therefore, the antenna uses a conductive frame 122, a conductive radiator provided on the inner side of the non-conductive frame 122, or a conductive radiator embedded inside the non-conductive frame 122 to achieve signal radiation, and the radiation efficiency is relatively low.

[0076] In order to improve the radiation efficiency of the antenna, please refer to ​ , ​ For ​Another schematic diagram of the internal structure of the electronic device 1 shown. In this embodiment, in addition to the first radiator 141 described in any of the above embodiments, the antenna 14 further includes a second radiator 142. The second radiator 142 is arranged at an interval from the first radiator 141, and the signal on the first radiator 141 can be coupled to the second radiator 142. The reference ground layer 23 has a first edge, 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 ground layer 23, the second edge b of the middle plate 121 forms the second edge of the reference ground layer 23, and the third edge c of the middle plate 121 forms the third edge of the reference ground layer 23. The first edge a, the second edge b and the third edge c of the middle plate 121 respectively represent three successively 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, an arc-shaped edge or a wavy edge, and no specific limitation is made 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 the section on the second edge b within a first preset length range from the first end M. The first preset length can be 1 / 2 times, 1 / 4 times or 1 / 8 times of the second edge b, and no specific limitation is made here. The end section of the third edge c connected to the first edge a refers to the section on the third edge c within a second preset length range from the second end N. The second preset length can be 1 / 2 times, 1 / 4 times or 1 / 8 times of the third edge c, and no specific limitation is made here.

[0077] It should be noted that when the orthographic projection area of the second radiator 142 on the plane where the middle plate is located is within the middle plate 121, the second radiator 142 can also be connected within a 50 mm length area of the largest surface of the middle plate 121 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.

[0078] In some embodiments, please continue to refer to ​ , the forming material of the frame 122 is a conductive material such as metal. In addition to the first gap A, the frame 122 also has a second gap B and a third gap C. The part of the frame 122 located 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 can include the following Embodiment 1 and Embodiment 2:

[0079] Embodiment 1: Please continue to refer to ​ , the second slot B and the first slot A are the same slot, and the third slot C is located on the side of the second slot B away from the first radiator 141, that is, the first slot A and the second slot B are located between the third slot C and the first radiator 141. In this way, the second radiator 142 and the first radiator 141 are adjacent and arranged at intervals, and the distance between the second radiator 142 and the first radiator 141 is relatively close, the structure of the antenna 14 is compact, and the occupied space on the frame 122 is small.

[0080] In the above Embodiment 1, a dielectric material can also be filled in the third slot C 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, a dielectric material can be filled in the gap 16 to ensure the structural integrity of the middle frame 12.

[0081] Embodiment 2: Please refer to ​ , ​ is ​ Three other schematic diagrams of the internal structure of the electronic device 1 shown. In this embodiment, the second slot B and the first slot A are arranged at intervals, and in the extending direction of the frame 122, the second slot B and the third slot C are located on the side of the first slot A away from the first radiator 141, that is, the first radiator 141 is located on one side of the first slot A, and the second slot B and the third slot C are located on the other side of the first slot A. The third slot C is located on the side of the second slot B away from the first slot A, that is, the second slot B is located between the third slot C and the first slot A. The part of the frame 122 between the second slot B and the first slot A forms a floating conductor 143. It can be understood that at least one slot can be added to the part of the frame 122 between the second slot B and the first slot A to form a plurality of floating conductors 143 between the second slot B and the first slot A. The floating conductor 143 is not connected to the reference ground (including the reference ground layer 23). When a radio frequency signal is fed into the first feeding point 141a, the second radiator 142 can be indirectly coupled to the first radiator 141 through the floating conductor 143. In this way, at least one floating conductor 143 is arranged between the second radiator 142 and the first radiator 141. Through the at least one floating conductor 143, the position of the second radiator 142 can be adjusted to a position with a better clearance environment, so as to facilitate electrically connecting the second radiator 142 to the first edge a of the middle plate 121.

[0082] Based on the above-mentioned second embodiment, both the first gap A and the second gap B are provided 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. In this way, the appearance effect of the frame 122 is relatively good. In some embodiments, for example, the universal serial bus (USB) device 18 is arranged inside the floating conductor 143 and abuts against the floating conductor 143. Herein, the inner side of the floating conductor 143 refers to the side of the floating conductor 143 facing the inside of the electronic device when applied to the electronic device. In addition, the USB device 18 abutting against the floating conductor 143 means that the USB device 18 can be arranged closely against the floating conductor 143 or can be arranged close to the floating conductor 143, that is, there can be a certain small gap between the USB device 18 and the floating conductor 143.

[0083] In the above-mentioned second embodiment, based on the fact that both the first gap A and the second gap B are provided on the first side 122a of the frame 122, in some embodiments, please continue to refer to ​ , compared with the first gap A, the second gap B is closer to the first end M of the first edge a. That is to say, the distance between the first gap A and the first end M of the first edge a in the extending 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 extending direction of the first side 122a. It can be understood that compared with the first gap A, the second gap B can also be closer to the second end N of the first edge a. That is to say, the distance between the first gap A and the first end M of the first edge a in the extending 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 extending direction of the first side 122a, and no specific limitation is made here.

[0084] When the second gap B is closer to the first end M of the first edge a compared with the first gap A, the third gap C can be provided on the first side 122a of the frame 122 or can be provided on the second side 122b of the frame 122. In some embodiments, please continue to refer to ​ , the third gap C is provided on the first side 122a of the frame 122. In some other embodiments, please refer to ​ , ​ For ​Another schematic diagram of the internal structure of the electronic device 1 shown. In this embodiment, the third slot C is provided on the second side 122b of the frame 122. At this time, the second radiator 142 includes an intersecting first section 1421 and a second section 1422. The first section 1421 is located between the second slot B and the second section 1422. The first section 1421 surrounds the first edge a of the middle plate 121. The second section 1422 is located between the first section 1421 and the third slot C. The second section 1422 surrounds 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.

[0085] In the above-mentioned second embodiment, the second slot B and the third slot C can 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, and between the floating conductor 143 and the middle plate 121, to ensure that the second radiator 142 and the floating conductor 143 have a good clearance environment, so that the second radiator 142 and the floating conductor 143 have good signal radiation performance. In some embodiments, the gap 16 can be filled with a dielectric material to ensure the structural integrity of the middle frame 12.

[0086] It can be understood that when the forming material of the frame 122 is a non-conductive material such as plastic or resin, the frame 122 cannot form the second radiator 142 described in the above-mentioned first and second embodiments. The second radiator 142 can be provided inside the frame 122 or embedded inside the frame 122. The frame 122 has a second frame section. The second radiator 142 is arranged in contact with or embedded inside the second frame section. In this way, the second slot B and the third slot C do not need to be provided 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 in the form of a flexible printed circuit (FPC), laser-direct-structuring (LDS) form or mode decoration antenna (MDA) form, which is not specifically limited here.

[0087] In the above-mentioned first and second embodiments, please refer to ​, the reference ground layer 23 can be excited to have a 1 / 2 wavelength characteristic mode in the first direction within the main resonance frequency band of the first radiator 141. To meet this requirement, generally, the electrical length of the reference ground layer 23 in the first direction is 1 / 2 wavelength of the main resonance frequency band of the first radiator 141. For example, if the main resonance frequency band of the first radiator 141 is B28 (703 MHz to 803 MHz), then the electrical length of the reference ground layer 23 in the first direction is 1 / 2 wavelength of the main resonance frequency of 703 MHz to 1 / 2 wavelength of the main resonance frequency of 803 MHz.

[0088] Among them, the electrical length of the reference ground layer 23 in the first direction refers to: the physical length (i.e., mechanical length or geometric length) D1 of the reference ground layer 23 in the first direction multiplied by the ratio of the transmission time t1 of an electrical or electromagnetic signal in the reference ground layer 23 in the first direction to the time t2 required for this signal to pass through a distance equal to the physical length of the reference ground layer 23 in the first direction in free space. That is, the electrical length L' of the reference ground layer 23 in the first direction can satisfy the following formula: L' = D1 × t1 / t2. Or, the electrical length of the reference ground layer 23 in the first direction can also refer to: the physical length (i.e., mechanical length or geometric length) D1 of the reference ground layer 23 in the first direction divided by the wavelength λ of the electromagnetic wave transmitted by the reference ground layer 23. That is, the electrical length L' of the reference ground layer 23 in the first direction can satisfy the following formula: L' = D1 / λ.

[0089] In addition, the first direction is parallel to the plane where the reference ground layer 23 is located and 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 the same as the extension direction of the midline of the wavy edge. Among them, the midline of the wavy edge refers to the straight line of the middle section of the first edge part between any adjacent peak points and valley points of the wavy edge. The middle section of the first edge part between adjacent peak points and valley points means that the center point coincides with the center point of this first edge part, and the length is 1 / 2 or 3 / 5 times the length of this first edge part, etc., which is not specifically limited here. When the first edge a is an arc edge, the extension direction of the first edge a is the same as the approximate straight line extension direction of the first edge a. The angle between the approximate straight line extension direction of the first edge a and any section on the first edge a is less than or equal to the first preset angle. The first preset angle includes but is not limited to 15°, 20°, or 30°, etc., which is not specifically limited here. In some embodiments, please refer to ​, the first edge a is a straight edge, and the first direction is perpendicular to the first edge a. The parasitic resonance frequency band generated by the second radiator 142 when the radio frequency signal is fed into the first feeding point 141a is lower than the main resonance frequency band of the first radiator 141. In some embodiments, the parasitic resonance frequency band generated by the second radiator 142 when the radio frequency signal is fed into the first feeding point 141a is close to the main resonance frequency band of the first radiator 141.

[0090] In this way, by adding the second radiator 142 and making the parasitic resonance frequency band generated by the coupling of the second radiator 142 and the first radiator 141 when the radio frequency signal is fed into the first feeding point 141a lower than the main resonance frequency band of the first radiator 141, and further connecting the second radiator 142 to the first edge a of the reference ground layer 23, and making the electrical length of the reference ground layer 23 in the first direction be 1 / 2 wavelength of the main resonance frequency band of the first radiator 141, that is, the reference ground layer 23 can be excited to generate a 1 / 2 wavelength eigenmode along the first direction within the main resonance frequency band of the first radiator 141, so as to excite the reference ground layer 23 through the second radiator 142 while exciting the first radiator 141 to generate resonance, thereby improving the radiation efficiency of the antenna 14.

[0091] In some embodiments, please continue to refer to ​ , the second radiator 142 is electrically connected to the first edge a of the reference ground layer 23 through a lumped parameter element 17. The lumped parameter element 17 includes but is not limited to a capacitor, an inductor, or a circuit obtained by parallel, series, or series-parallel connection of one or both of an inductor and a capacitor. In some embodiments, the lumped parameter element 17 is an inductor, and the inductance value of the inductor can be 18 nH. In this way, by adjusting the electrical length of the second radiator 142 through the lumped parameter element 17, while adjusting the parasitic resonance frequency band generated by the second radiator 142 when the radio frequency signal is fed into the first feeding point 141a to be lower than the main resonance frequency band of the first radiator 141, the physical length of the second radiator 142 is reduced, thereby reducing the occupied length of the antenna 14 on the frame 122.

[0092] 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, and the second radiator 142 can also be electrically connected to the end section of the first edge a of the middle plate 121, which is not specifically limited here.

[0093] In some embodiments, please continue to refer to ​ , 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 the section on the first edge a within a third preset length range from the center point of the first edge a. The third preset length can be 1 / 4 times, 1 / 10 times, or 1 / 8 times the length of the first edge a.

[0094] 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 within a fourth preset length range from the first end M or the second end N of the first edge a. Herein, 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 ground layer 23 is excited by the second radiator 142, the first-direction pattern (i.e., the longitudinal pattern) of the reference ground layer 23 is sufficiently excited, and the radiation efficiency of the antenna 14 can be further improved. In some specific embodiments, please refer to ​ , compared with the first slot A, the second slot B is disposed 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. The end section where the first end M is located refers to a section on the first edge a within a 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 short, the electrical connection path between the second radiator 142 and the end section where the first end M is located is short, 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, by way of example, please refer to ​ , the second radiator 142 is electrically connected to the position of the first end M of the end section where the first end M is located; by way of another example, please refer to ​ , the second radiator 142 is electrically connected to the m1 position of the end section where the first end M is located.

[0095] Please refer to ​ , ​ as shown in ​ , ​ , ​ and ​ are the comparison diagrams of the radiation efficiency curves of the antenna 14 in the antenna frequency band of B28 (703 MHz to 803 MHz) in the electronic device 1 shown in the free space (FS) state;

[0096] ​ as shown in ​ , ​ and ​ are the comparison diagrams of the radiation efficiency curves of the antenna 14 in the antenna frequency band of B5 (824 MHz to 894 MHz) in the electronic device 1 shown in the FS state; ​ as shown in ​ , ​ and ​In the electronic device 1 shown, when the antenna 14 is in the FS state, a comparison graph of the radiation efficiency curves of the antenna frequency band of B8 (880 MHz to 960 MHz) is generated. Compared with ​ the antenna 14 in the electronic device 1 shown, ​ , ​ and ​ a second radiator 142 is added to the antenna 14 in the electronic device 1 shown, and the second radiator 142 is electrically connected to the first edge a of the middle plate 121. ​ The second radiator 142 of the antenna 14 in the electronic device 1 shown is electrically connected to the middle section of the first edge a of the middle plate 121, ​ and ​ the second radiator 142 of the antenna 14 in the electronic device 1 shown is electrically connected to the end section where the first end M of the first edge a of the middle plate 121 is located. ​ The abscissa is frequency (unit: GHz), and the ordinate is efficiency (unit: dB). It can be seen from ​ that ​ , ​ and ​ the radiation efficiency of the antenna 14 in the electronic device 1 shown in the common low-frequency (LB) antenna frequency band (for example, B28, B5, or B8 frequency band) when in the FS state is greater than ​ the radiation efficiency of the antenna 14 in the electronic device 1 shown in the common LB antenna frequency band when in the FS state; ​ and ​ the radiation efficiency of the antenna 14 in the electronic device 1 shown in the common LB antenna frequency band when in the FS state is greater than ​ the radiation efficiency of the antenna 14 in the electronic device 1 shown in the common LB antenna frequency band when in the FS state.

[0097] To increase the application frequency band range of the antenna 14, in some embodiments, please refer to ​ , ​ which is ​ another schematic diagram of the internal structure of the electronic device 1 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 setting positions of the second grounding point 142b and the second feeding point 142a on the second radiator 142 are not limited, 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 arranged at opposite ends of the second radiator 142 along its own extending direction. For example, please continue to refer to ​, the second grounding point 142b is disposed at one end of the second radiator 142 where the third slot C is formed, and the second feeding point 142a is disposed at one end of the second radiator 142 where the second slot B is formed. It can be understood that the second grounding point 142b can also be disposed at one end of the second radiator 142 where the second slot B is formed. At this time, the second feeding point 142a is disposed at one end of the second radiator 142 where the third slot C is formed. In this way, the second radiator 142 forms a CRLH antenna or a loop antenna.

[0098] In some embodiments, please refer to ​ , ​ is ​ a partial enlarged view of an electronic device 1 as shown. The second grounding point 142b is electrically connected to the reference ground layer 23 through a 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 block signals in the first frequency band and allow signals in the second frequency band to pass through. Among them, the first frequency band includes the main resonance frequency band generated by the first radiator 141 and the parasitic resonance frequency band generated by the second radiator 142 when a radio frequency signal is fed into the first feeding point 141a. For example, the first frequency band includes the minimum frequency value within the parasitic resonance frequency band generated by the second radiator 142 when a radio frequency signal is fed into the first feeding point 141a to the maximum frequency value within the main resonance frequency band generated by the first radiator 141 when a radio frequency signal is fed into the first feeding point 141a. For example, the parasitic resonance frequency band generated by the second radiator 142 when a radio frequency signal is fed into the first feeding point 141a is 700 MHz - 750 MHz, the minimum frequency value within this frequency band is 700 MHz, the main resonance frequency band generated by the first radiator 141 when a radio frequency signal is fed into the first feeding point 141a is 780 MHz - 850 MHz, the maximum frequency value within this frequency band is 850 MHz, then the first frequency band includes 700 MHz - 850 MHz. The second frequency band includes the main resonance frequency band generated by the second radiator 142 when a radio frequency signal is fed into the second feeding point 142a. For example, the main resonance frequency band generated by the second radiator 142 when a radio frequency signal is fed into the second feeding point 142a is 1810 MHz - 2000 MHz, then the second frequency band includes 1810 MHz - 2000 MHz.

[0099] Among them, the first frequency band includes the main resonance frequency band generated by the first radiator 141 and the parasitic resonance frequency band generated by the second radiator 142 when a radio frequency signal is fed into the first feeding point 141a, and the second frequency band includes the main resonance frequency band generated by the second radiator 142 when a radio frequency signal is fed into the second feeding point 142a of the second radiator 142.

[0100] In some other embodiments, please refer to ​ , ​ which is ​ another partial enlarged view of the electronic device 1 shown in the figure. The second grounding point 142b is electrically connected to the reference ground layer 23 through the switching circuit 21. That is, the second grounding point 142b is electrically connected to one end of the switching circuit 21, and the other end of the switching circuit 21 is electrically connected to the reference ground layer 23. The switching circuit 21 can be switched to the off state when a radio frequency signal in the first frequency band is fed into the first feeding point 141a; and is in the on state when a radio frequency signal in the second frequency band is fed into the second feeding point 142a, so as to achieve the purpose of blocking the signal in the first frequency band from passing through and allowing the signal in the second frequency band to pass through. In some embodiments, the switching circuit 21 includes an active switch and tuning elements connected between the active switch and the second grounding point 142b and / or between the active switch and the reference ground layer 23. The tuning element is an inductor, a capacitor, or a circuit obtained by parallel connection, series connection, or series-parallel connection of one or both of an inductor and a capacitor. In some other embodiments, please refer to ​ , the switching circuit 21 includes a first switching switch 211 and a plurality of different first tuning elements 212. The first tuning elements 212 include, but are not limited to, capacitors, inductors, or circuits obtained by parallel connection, series connection, or series-parallel connection of one or both of an inductor and a capacitor. The plurality of first tuning elements 212 are electrically connected to the reference ground layer 23. The first switching switch 211 includes, but is not limited to, a single-pole multi-throw switch and a multi-pole multi-throw switch. The first switching 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 a radio frequency signal in the first frequency band is fed into the first feeding point 141a; and when a radio frequency signal in the second frequency band is fed into the second feeding point, selectively electrically connect different first tuning elements to the second grounding point to adjust the resonant frequency band generated by the second radiator 142. In this way, the switching circuit 21 can not only achieve the purpose of blocking the signal in the first frequency band from passing through and allowing the signal in the second frequency band to pass through, but also adjust the operating frequency band of the second radiator 142.

[0101] It should be noted that the second grounding point 142b of the present application is not an actual existing point. The position where the reference ground layer 23 is electrically connected to the second radiator 142 through the filter 19 or the switching circuit 21 is the second grounding point 142b.

[0102] The electronic device 1 further includes a second radio frequency front end 20. The second radio frequency front end 20 is electrically connected to a second feeding point 142a of the second radiator 142. The second radio frequency front end 20 is configured to feed a radio frequency signal into the second radiator 142 or receive an external radio frequency signal received by the second radiator 142. In some embodiments, the second radio frequency front end 20 includes a transmitting path and a receiving path. The transmitting path includes devices such as a power amplifier and a filter. After the signal is processed such as power amplification and filtering by the power amplifier, filter and other devices, it is transmitted to the second radiator 142 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. After the external signal received by the second radiator 142 is processed such as low noise amplification and filtering by the low noise amplifier, filter and other devices, it is transmitted to the radio frequency chip, so as to realize the communication between the electronic device 1 and the outside through the second radio frequency front end 20 and the antenna 14. It should be noted that the second feeding point 142a in this application is not an actually existing point, and the position where the second radio frequency front end 20 is electrically connected to the second radiator 142 is the second feeding point 142a mentioned in this application. In some embodiments, the second radio frequency 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 radio frequency signal fed by the second radio frequency front end 20 is within the main resonance frequency band of the second radiator 142.

[0103] Thus, in addition to being able to transmit or receive signals in the first frequency band when a radio frequency signal is fed at the first feeding point 141a, the antenna 1 provided in this embodiment can also transmit or receive signals in the second frequency band when a radio frequency signal is fed at the second feeding point 142a. Therefore, the antenna 14 has a relatively wide application frequency band and a wide application range.

[0104] In some 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, and the width of the middle plate 121 in the transverse direction is 75 mm ± 5 mm. 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 ground layer 23. The first frequency band is within the low band (LB) frequency band, and the second frequency band is within the middle / high band (MHB) frequency band. Among them, the LB frequency band can be, for example, 699 MHz to 960 MHz, and the MHB frequency band can be, for example, 1710 MHz - 2690 MHz. Thus, the antenna 14 provided in the embodiment of this application can cover the low / middle / high band (LMH) frequency band and has a wide application range.

[0105] 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, and 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 ground layer 23. The first frequency band is located within the middle / high band (MHB) frequency band, and the second frequency band is located within the LB frequency band.

[0106] In ​ In the embodiment shown, when a radio frequency signal is fed into the first feeding point 141a, the switching circuit 21 or the filter 19 is in a blocking state, and the second grounding point 142b of the second radiator 142 is not connected to the reference ground layer 23. 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 direction mode (such as the longitudinal mode) of the reference ground layer 23. When a radio frequency signal is fed into the second feeding point 142a, the switching 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 at the same time, 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 and is used to adjust the operating frequency band of the second radiator 142.

[0107] One end of the lumped parameter element 17 connected to the second radiator 142 can be connected to the end of the second radiator 142 along its own extension direction or to the middle of the second radiator 142 along its own extension direction, and no specific limitation is made here. In some embodiments, please continue to refer to ​ , the lumped parameter element 17 and the second radio frequency 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 radio frequency 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 has a lower structural complexity.

[0108] In ​ In the embodiment shown, the third slit C is provided on the second side 122b of the frame 122. When holding the electronic device 1 by hand, it is easy to block the third slit C, thereby weakening the middle / high frequency (MHB) radiation performance of the antenna 14 when a radio frequency signal is fed into the second feeding point 142a and causing a resonance frequency shift. Please refer to ​ , ​ For ​The graph of the mid - high frequency input return loss coefficient (S11) (i.e., the input return loss coefficient at the second feeding point 142a) of the antenna 14 in the electronic device 1 shown in the FS state, the beside head hand left (BHHL) state, and the beside head hand right (BHHR) state.

[0109] And when ​ there is no third slot C, filter 19, and switch circuit 21 in the electronic device 1 shown, another schematic diagram of the internal structure of the electronic device 1 shown is obtained. Please refer to ​ ... ​ , ​ is ​ the graph of the mid - high frequency input return loss coefficient (S11) of the antenna 14 in the electronic device 1 shown in the FS state, the BHHL state, and the BHHR state. ​ and ​ The abscissas of both are frequency (unit: GHz), and the ordinates are both S11 (unit: dB). By comparing ​ and ​ it can be concluded that ​ the mid - high frequency resonance frequency offset generated by the antenna 14 in the electronic device 1 shown in the FS state, the BHHL state, and the BHHR state is small, and when holding the electronic device 1, the influence on the mid - high frequency radiation performance of the antenna 14 is small. Please refer to ​ , ​ is ​ and ​ the comparison graph of the mid - high frequency radiation efficiency curves of the antenna 14 in the electronic device shown in the FS state, the BHHL state, and the BHHR state. ​ The abscissas of both are frequency (unit: GHz), and the ordinates are both radiation efficiency (unit: dB). From ​ it can be seen that ​ the mid - high frequency radiation efficiencies of the antenna 14 in the electronic device 1 shown in the FS state, the BHHL state, and the BHHR state are respectively greater than ​ the mid - high frequency radiation efficiencies of the antenna 14 in the electronic device 1 shown in the FS state, the BHHL state, and the BHHR state. Therefore, ​ the antenna 14 in the electronic device 1 shown can be put into practical application, and the radiation performance of the mid - high frequency is relatively good.

[0110] In order to further increase the number of radiation frequency bands of the antenna 14, in some embodiments, please refer to ​ , ​ is ​Another schematic diagram of the internal structure of the electronic device 1 shown. In this embodiment, the part of the frame 122 located on the side of the third gap C away from the second gap B and adjacent to the third gap C forms the third radiator 144. That is to say, the third radiator 144 and the second radiator 142 are respectively located on both sides of the third gap 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 one side of the frame 122 where the third gap C is located, and the third radiator 144 is formed on the other side of the frame 122 where the third gap C is located. The third radiator 144 can couple with the second radiator 142 to generate parasitic resonance when a radio frequency signal is fed into the second feeding point 142a, thereby further increasing the number of radiation frequency bands of the antenna 14.

[0111] In some embodiments, please refer to ​ , ​ is ​ Another schematic diagram of the internal structure of the electronic device 1 shown. In this embodiment, the third radiator 144 has a third grounding point 144b and a third feeding point 144a arranged at intervals. The third grounding point 144b is electrically connected to the reference ground layer 23. In some embodiments, please refer to ​ , 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 further includes a third radio frequency front end 22, and the third radio frequency front end 22 is electrically connected to the third feeding point 144a.

[0112] In some embodiments, please refer to ​ , ​ is ​Another schematic diagram of the internal structure of the electronic device 1 shown. In this embodiment, the third radiator 144 has a connection point 144c. In some embodiments, the connection point 144c and the third ground 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 gap 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 elements 242 include, but are not limited to, capacitors, inductors, or circuits obtained by parallel, series, or series-parallel combinations of one or two of inductors and capacitors. 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 electrically connect different second tuning elements 242 to the connection point 144c to adjust the resonance frequency of the third radiator 144. Specifically, the switching circuit 24 is used to tune the resonance 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 in this application does not actually exist, and the position where the switching circuit 24 is electrically connected to the third radiator 144 is the connection point 144c.

[0113] On the basis of the above embodiments, optionally, when the second radiator 143 is grounded through the switch circuit 21, the first switching switch 211 in the switch circuit 21 and the second switching switch 241 in the switching circuit 24 are packaged together. The switching circuit of the packaged switch as a whole is the superposition of the switching circuit of the first switching switch 211 and the switching circuit of the second switching switch 241. Thus, the number of components included in the electronic device can be reduced, which is beneficial to simplifying the assembly process of the electronic device.

[0114] In the description of this specification, specific features, structures, materials, or characteristics may be combined in a suitable manner in any one or more embodiments or examples.

[0115] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, and are not intended to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. An electronic device, characterized in that, Comprising: Reference formation; A 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 formation, and the first feeding point being used for feeding the first radiator; A second radiator spaced from the first radiator, the second radiator being electrically connected to the reference formation, and the parasitic resonance frequency band generated by the second radiator when a radio frequency signal is fed into the first feeding point being lower than the main resonance frequency band generated by the first radiator when a radio frequency signal is fed into the first feeding point.

2. The electronic device according to claim 1, wherein The end section of the second radiator electrically connected to the reference formation.

3. The electronic device according to claim 1 or 2, characterized in that, The second radiator is electrically connected to the reference formation through lumped parameter elements.

4. The electronic device according to claim 3, wherein The lumped parameter elements are inductors, capacitors or circuits obtained by parallel connection, series connection or series-parallel connection of one or two of inductors and capacitors.

5. The electronic device according to any one of claims 1-4, characterized in that, The second radiator has a second feeding point and a second grounding point arranged at intervals, the second feeding point being used for feeding the second radiator, and the second grounding point being electrically connected to the reference formation through a filter or a switching circuit, and the filter and the switching circuit being used to block signals in a first frequency band and allow signals in a second frequency band to pass through, where The first frequency band includes the minimum frequency value within the parasitic resonance frequency band generated by the second radiator when a radio frequency signal is fed into the first feeding point to the maximum frequency value within the main resonance frequency band generated by the first radiator when a radio frequency 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 a radio frequency signal is fed into the second feeding point.

6. The electronic device according to claim 5, wherein The filter is an LC filter.

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

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

9. The electronic device according to any one of claims 1-8, characterized in that, Further comprising: A conductive middle plate forming the reference formation; A conductive frame, the frame is disposed around the middle plate for one week, the frame includes a first side, 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, 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, a portion of the frame located between the first gap and the second gap forms a floating conductor, and the electronic device further includes: A USB device, the USB device is located inside the floating conductor and is disposed against the floating conductor.

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

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

13. The electronic device according to claim 12, characterized in that, The frame further has a second side, the second side is disposed around the middle plate and is connected to the first side, and the third gap is disposed on the second side.

14. The electronic device according to claim 13, wherein 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 of the length of the second side.

15. The electronic device according to any one of claims 12-14, characterized in that, The middle plate further has a second end opposite to the first end; The frame further has a third side, the third side is disposed around the middle plate, and the third side and the second side are respectively connected to opposite ends of the first side, the frame further has a fourth gap, the fourth gap is disposed on the third side, and a 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 of the length of the third side.

17. The electronic device according to any one of claims 9-16, characterized in that, A portion of the frame adjacent to the third gap forms a third radiator, the third radiator and the second radiator are respectively located on both sides of the third gap, 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 spaced apart. The third grounding point is electrically connected to the reference ground plane, and the third feeding point is used to feed the third radiator.

18. The electronic device according to claim 17, wherein The third radiator further has a connection point. The electronic device further includes a switching circuit, and 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 plane; The second switching switch is configured to switchably electrically connect different second tuning elements to the connection point to adjust the resonance frequency of the third radiator.

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