Electronic device

Abstract

This application provides an electronic device including a reference ground plane and an antenna element. The antenna element includes an antenna radiator, a feed source, a first tuning circuit, and a first grounding element. One end of the antenna radiator forms a free end, and the other end forms a grounding end, electrically connected to the reference ground plane. A feed point and an electrical connection point located on the side of the feed point away from the free end are provided between the free end and the grounding end. The feed point is electrically connected to the feed source through the first tuning circuit. One end of the first grounding element is electrically connected to the electrical connection point, and the other end of the first grounding element is electrically connected to the reference ground plane. Under the excitation of the feed source, the antenna element generates a first resonant mode supporting a first frequency band, a second resonant mode supporting a second frequency band, and a third resonant mode supporting a third frequency band. The electronic device provided by this application can realize multiple frequency bands and has a flexible structural design.

Description

Technical Field

[0001] This application relates to the field of electronic technology, specifically to an electronic device. Background Technology

[0002] In related technologies, multi-band and wide-band performance of antennas is achieved by adding parasitic radiating branches. This technical solution has many requirements for the structural design of the antenna. Summary of the Invention

[0003] This application provides an electronic device that can achieve multiple frequency bands and has a flexible structural design.

[0004] Specifically, this application provides an electronic device, including:

[0005] Reference flooring; and

[0006] An antenna unit includes an antenna radiator, a feed source, a first tuning circuit, and a first grounding element. One end of the antenna radiator forms a free end, and the other end of the antenna radiator forms a grounding end. The grounding end is electrically connected to a reference ground. A feed point and an electrical connection point are provided between the free end and the grounding end, on the side of the feed point away from the free end. The feed point is electrically connected to the feed source through the first tuning circuit. One end of the first grounding element is electrically connected to the electrical connection point, and the other end of the first grounding element is electrically connected to the reference ground.

[0007] Wherein, the first grounding element, the antenna radiator between the grounding end and the free end generates a first resonant mode supporting a first frequency band under the excitation of the feed source; the first grounding element, the antenna radiator between the electrical connection point and the free end generates a second resonant mode supporting a second frequency band under the excitation of the feed source; the antenna radiator between the feed point and the free end generates a third resonant mode supporting a third frequency band under the excitation of the feed source.

[0008] The electronic device provided in this application includes a reference ground plane and an antenna unit. The antenna unit includes an antenna radiator, a feed source, a first tuning circuit, and a first grounding element. By forming a free end at one end of the antenna radiator and a grounding end at the other end, and designing a feed point and an electrical connection point located on the side of the feed point away from the free end between the grounding end and the free end, the feed point is electrically connected to the feed source through the first tuning circuit. One end of the first grounding element is electrically connected to the electrical connection point, and the other end of the first grounding element is electrically connected to the reference ground plane. This allows the antenna radiator between the feed source, the first tuning circuit, the grounding end, and the free end to form a... An inverted-F antenna can form another inverted-F antenna by combining the feed, the first tuning circuit, the first grounding element, and the antenna radiator between the electrical connection point and the free end. Thus, the antenna radiator between the first grounding element and the ground end generates a first resonant mode under the excitation of the feed; the antenna radiator between the first grounding element and the electrical connection point and the free end generates a second resonant mode under the excitation of the feed; and the antenna radiator between the feed point and the free end generates a third resonant mode under the excitation of the feed. This achieves antenna element support for the first, second, and third frequency bands, broadening the communication frequency band of electronic devices. Since no parasitic radiating branches are added, and different types of antenna elements and multiple resonant modes are formed by adding the first grounding element, the antenna element's structural design is simpler, more flexible, and more conducive to miniaturization. Attached Figure Description

[0009] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments will be briefly described below.

[0010] Figure 1 This is a schematic diagram of the structure of an electronic device provided in an embodiment of this application;

[0011] Figure 2 for Figure 1 A schematic diagram of the specific structure of the antenna unit in the electronic device shown;

[0012] Figure 3 for Figure 2 The diagram shows a structure in which the first grounding component of the antenna unit is replaced with a grounding circuit containing inductors and / or capacitors.

[0013] Figure 4 for Figure 2 A schematic diagram of the resonant current distribution in the first resonant mode of the antenna element shown.

[0014] Figure 5 for Figure 2 A schematic diagram of the resonant current distribution in the second resonant mode of the antenna element shown.

[0015] Figure 6 for Figure 2A schematic diagram of the resonant current distribution in the third resonant mode of the antenna element shown.

[0016] Figure 7 for Figure 2 The diagram shows an antenna element with its length parameter labeled.

[0017] Figure 8 for Figure 2 A schematic diagram of the resonant current distribution in the first intermediate mode of the antenna element shown.

[0018] Figure 9 for Figure 2 A schematic diagram of the resonant current distribution in the second intermediate mode of the antenna element shown.

[0019] Figure 10 for Figure 2 A schematic diagram of the resonant current distribution in the third intermediate mode of the antenna element shown.

[0020] Figure 11 for Figure 2 The antenna unit shown also includes a structural diagram of a second grounding component;

[0021] Figure 12 for Figure 11 The diagram shows a structure in which the sum of the length of the first grounding component and the length of the antenna radiator between the electrical connection point and the feed point is greater than or equal to 1 / 16 of the wavelength of the first frequency band, and less than or equal to 3 / 16 of the wavelength of the first frequency band.

[0022] Figure 13 for Figure 11 The reference ground plane of the antenna element shown includes a first edge and a second edge, and the antenna radiator is located on one side of the first edge.

[0023] Figure 14 for Figure 11 The reference ground plane of the antenna element shown includes a first edge and a second edge. The first radiating segment of the antenna radiator is located on one side of the first edge, and the second radiating segment is located on one side of the second edge.

[0024] Figure 15 for Figure 13 The diagram shows the distribution of the ground current excited by the antenna element at the reference ground.

[0025] Figure 16 for Figure 10 The diagram shows the structure of the antenna element whose grounding terminal is located on the side of the free end near the corner of the floor.

[0026] Figure 17 for Figure 10The diagram shows the structure of the antenna unit where the other end of the first grounding component is located on the side of the first grounding component near the corner of the floor.

[0027] Figure 18 for Figure 13 A schematic diagram of the structure of the reference ground of the electronic device shown, where the length of the first edge is greater than the length of the second edge;

[0028] Figure 19 for Figure 14 The diagram shows a structure in which the projection of the feed point of the antenna element onto the reference ground plane and the projection of the free end onto the reference ground plane are both located at the first edge.

[0029] Figure 20 for Figure 11 The antenna unit shown also includes a schematic diagram of the second tuning circuit.

[0030] Figure 21 for Figure 18 The diagram shows the return loss and efficiency curves of the electronic device.

[0031] Figure 22 for Figure 19 The diagram shows the return loss and efficiency curves of the electronic device.

[0032] Figure 23 for Figure 19 The SAR value test diagram of the electronic device shown;

[0033] Figure 24 for Figure 18 The antenna unit of the electronic device shown also includes a structural diagram of parasitic branches.

[0034] Explanation of reference numerals in the attached figures:

[0035] Electronic device 1000; Reference ground 200; Antenna element 100; Frame 300; First sub-frame 31; Second sub-frame 32; Third sub-frame 33; Fourth sub-frame 34; Antenna radiator 10; Feed source 20; First tuning circuit 30; First grounding element 40; Free end 11; Grounding end 12; Feed point 13; Electrical connection point 14; Second grounding element 60; First radiating section 101; Second radiating section 102; First edge 21; Second edge 22; Third edge 23; Ground corner point 25; Fourth edge 24; Second tuning circuit 50; Parasitic branch 16. Detailed Implementation

[0036] The technical solutions provided in this application will now be clearly and completely described with reference to the accompanying drawings. Obviously, the embodiments described in this application are only a part of the embodiments, and not all of the embodiments. All other embodiments obtained by those skilled in the art based on the embodiments described in this application without creative effort are within the protection scope of this application.

[0037] In this application, the terms "embodiment" or "implementation" mean that a specific feature, structure, or characteristic described in connection with an embodiment or implementation can be included in at least one embodiment of this application. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor is it a mutually exclusive, independent, or alternative embodiment to other embodiments. Those skilled in the art will explicitly and implicitly understand that the embodiments described in this application can be combined with other embodiments.

[0038] The terms “first,” “second,” etc., in the specification, claims, and accompanying drawings of this application are used to distinguish different objects, rather than to describe a particular order; the terms “comprising” and “having,” and any variations thereof, are intended to cover non-exclusive inclusion.

[0039] like Figure 1 As shown, Figure 1 This is a schematic diagram of the structure of an electronic device 1000 provided in an embodiment of this application. The electronic device 1000 can be a mobile phone, tablet, laptop, watch, drone, robot, or other device with wireless communication capabilities. This embodiment of the application uses a mobile phone as an example. The electronic device 1000 includes a reference ground plane 200 and an antenna unit 100.

[0040] Reference ground 200 refers to the portion of electronic device 1000 that is considered to be conductive ground and is not affected by any grounding configuration. The potential of reference ground 200 is conventionally zero. For example, reference ground 200 may include the ground plane of the main circuit board, the ground plane of the secondary circuit board, the metal parts of the middle frame, and conductive parts that electrically connect one or more of the ground planes of the main circuit board, the ground plane of the secondary circuit board, and the metal parts of the middle frame in electronic device 1000.

[0041] The middle frame includes a border 300. The border 300 encloses and forms an accommodating space. In one possible embodiment, the border 300 may include a first sub-border 31, a second sub-border 32, a third sub-border 33, and a fourth sub-border 34 connected end-to-end in sequence. The first sub-border 31 and the third sub-border 33 are arranged opposite to each other. The second sub-border 32 and the fourth sub-border 34 are arranged opposite to each other. In this embodiment, the relative direction between the first sub-border 31 and the third sub-border 33 is defined as the width direction of the electronic device 1000, as shown in the attached figure. Figure 1The Y-axis direction; the relative direction between the second sub-border 32 and the fourth sub-border 34 is defined as the length direction of the electronic device 1000, as shown in the appendix. Figure 1 The X-axis direction. Among them, the length of the first sub-border 31 can be equal to the length of the third sub-border 33, the length of the second sub-border 32 can be equal to the length of the fourth sub-border 34, and the lengths of the first sub-border 31 and the third sub-border 33 can be greater than the lengths of the second sub-border 32 and the fourth sub-border 34.

[0042] In this embodiment, the first sub-border 31 is the right side border of the electronic device 1000, the second sub-border 32 is the top border of the electronic device 1000, the third sub-border 33 is the left side border of the electronic device 1000, and the fourth sub-border 34 is the bottom border of the electronic device 1000. Of course, in other possible embodiments, the first sub-border 31 can also be the left side border of the electronic device 1000, the second sub-border 32 can also be the top border of the electronic device 1000, the third sub-border 33 can also be the right side border of the electronic device 1000, and the fourth sub-border 34 can also be the bottom border of the electronic device 1000; or, the first sub-border 31 can also be the right side border of the electronic device 1000, the second sub-border 32 can also be the bottom border of the electronic device 1000, the third sub-border 33 can also be the left side border of the electronic device 1000, and the fourth sub-border 34 can also be the bottom border of the electronic device 1000. The top border; or, the first sub-border 31 can also be the left border of the electronic device 1000, the second sub-border 32 can also be the bottom border of the electronic device 1000, the third sub-border 33 can also be the right border of the electronic device 1000, and the fourth sub-border 34 can also be the top border of the electronic device 1000; or, the first sub-border 31 can also be the right border of the electronic device 1000, the second sub-border 32 can also be the bottom border of the electronic device 1000, the third sub-border 33 can also be the left border of the electronic device 1000, and the fourth sub-border 34 can also be the top border of the electronic device 1000.

[0043] like Figure 2 As shown, Figure 2 for Figure 1 This is a schematic diagram of the structure of an antenna unit 100 in the electronic device 1000 shown. The antenna unit 100 includes an antenna radiator 10, a feed source 20, a first tuning circuit 30, and a first grounding element 40.

[0044] The antenna radiator 10 can be a frame antenna radiator or an internal antenna radiator. In other words, the antenna radiator 10 can be located on the frame 300 or within the accommodating space formed by the frame 300. The material of the antenna radiator 10 can be metal, alloy, etc. One end of the antenna radiator 10 forms a free end 11. The other end of the antenna radiator 10 forms a ground end 12. A "free end" can be understood as an end that is not electrically connected to a conductive component or has a gap between it and a conductive component. The ground end 12 is electrically connected to the reference ground 200. The ground end 12 and the reference ground 200 can be directly electrically connected or indirectly electrically connected. In the following embodiments, the technical solution provided in this application is described in detail using the direct electrical connection between the ground end 12 and the reference ground 200, and the indirect electrical connection between the ground end 12 and the reference ground 200 through the second grounding component 60 as examples.

[0045] A feed point 13 and an electrical connection point 14 are provided between the grounding terminal 12 and the free terminal 11. The feed point 13 can be understood as a specific location between the grounding terminal 12 and the free terminal 11. The electrical connection point 14 can be understood as a specific location between the grounding terminal 12 and the free terminal 11, but different from the feed point 13. It is understood that the feed point 13 does not coincide with either the free terminal 11 or the grounding terminal 12; that is, the feed point 13 is not located at either the free terminal 11 or the grounding terminal 12. Similarly, the electrical connection point 14 does not coincide with either the free terminal 11 or the grounding terminal 12. The feed point 13 and the electrical connection point 14 are spaced apart. It is understood that the free terminal 11, the feed point 13, the electrical connection point 14, and the grounding terminal 12 are arranged sequentially.

[0046] Feed 20 is electrically connected to the RF chip and can receive the RF current provided by the RF chip. Feed point 13 is electrically connected to feed 20 through first tuning circuit 30. In other words, first tuning circuit 30 is electrically connected between feed point 13 and feed 20. Feed point 13 and first tuning circuit 30 can be directly or indirectly electrically connected. Similarly, first tuning circuit 30 and feed 20 can be directly or indirectly electrically connected.

[0047] The first grounding element 40 can be a grounding wire or a grounding circuit with inductors and / or capacitors. One end of the first grounding element 40 is electrically connected to the electrical connection point 14, and the other end of the first grounding element 40 is electrically connected to the reference ground 200.

[0048] In one possible embodiment, such as Figure 2As shown, the first grounding component 40 is a grounding wire. One end of the first grounding component 40 is electrically connected to the electrical connection point 14, and the other end of the first grounding component 40 is electrically connected to the reference ground 200. The first grounding component 40 and the electrical connection point 14 can be directly electrically connected, or they can be indirectly electrically connected through conductive components such as metal springs. The first grounding component 40 and the reference ground 200 can be directly electrically connected, or they can be indirectly electrically connected through conductive components such as metal springs. In the following embodiments, the direct electrical connection between the first grounding component 40 and the electrical connection point 14, and the direct electrical connection between the first grounding component 40 and the reference ground 200 are used as examples.

[0049] In another possible embodiment, such as Figure 3 As shown, the first grounding element 40 is a grounding circuit with inductors and / or capacitors. The grounding circuit is electrically connected to electrical connection point 14 and to reference ground 200. The grounding circuit and electrical connection point 14 can be directly or indirectly connected. The grounding circuit design must ensure that a portion of the resonant current on the antenna radiator 10 can return to ground through electrical connection point 14 and the grounding circuit, while another portion of the resonant current cannot return to ground through electrical connection point 14 and the grounding circuit. This will be explained in detail in subsequent specific embodiments.

[0050] Understandably, the feed 20, the first tuning circuit 30, the antenna radiator 10 between the electrical connection point 14 and the free end 11, and the first grounding element 40 form a first inverted F-type antenna. The feed 20, the first tuning circuit 30, the antenna radiator 10 between the grounding end 12 and the free end 11 form a second inverted F-type antenna.

[0051] Please refer to Figures 4 to 6 The antenna radiator 10 between the first grounding element 40, grounding terminal 12, and free end 11 generates a first resonant mode supporting the first frequency band under the excitation of the feed source 20. The antenna radiator 10 between the first grounding element 40, electrical connection point 14, and free end 11 generates a second resonant mode supporting the second frequency band under the excitation of the feed source 20. The antenna radiator 10 between the feed point 13 and free end 11 generates a third resonant mode supporting the third frequency band under the excitation of the feed source 20.

[0052] like Figure 4 As shown, the first resonant mode generated by the antenna radiator 10 between the first grounding element 40, the grounding end 12, and the free end 11 under the excitation of the feed source 20 is as follows: Figure 4As shown by the dashed line, the first resonant mode includes the resonant current from the first grounding element 40 through the electrical connection point 14 to the free end 11, and the resonant current from the grounding end 12 to the free end 11. When the first grounding element 40 is a grounding circuit with inductors and / or capacitors, the design of the grounding circuit must ensure that part of the resonant current of the first resonant mode can return to ground through the electrical connection point 14 and the grounding circuit, while another part of the resonant current can return to ground through the grounding end 12.

[0053] like Figure 5 As shown, the second resonant mode generated by the antenna radiator 10 between the first grounding element 40, the electrical connection point 14, and the free end 11 under the excitation of the feed source 20 is as follows: Figure 5 As shown by the dashed line. The second resonant mode includes the resonant current from the first grounding element 40 through the electrical connection point 14 to the free end 11. When the first grounding element 40 is a grounding circuit with inductors and / or capacitors, the design of the grounding circuit must ensure that all the resonant current of the second resonant mode returns to ground through the electrical connection point 14 and the grounding circuit.

[0054] like Figure 6 As shown, the third resonant mode generated by the antenna radiator 10 between the feed point 13 and the free end 11 under the excitation of the feed source 20 is as follows: Figure 6 As shown by the dashed line. The third resonant mode includes the resonant current from the feed point 13 to the free end 11.

[0055] The first tuning circuit 30 may include capacitors and / or inductors. This application does not specifically limit the number of capacitors or inductors included in the first tuning circuit 30. When the first tuning circuit 30 includes multiple capacitors, the capacitors may be connected in series or in parallel. When the first tuning circuit 30 includes multiple inductors, the inductors may be connected in series or in parallel. When the first tuning circuit 30 includes one or more capacitors and one or more inductors, the inductors and capacitors may be connected in series or in parallel. The first tuning circuit 30 is used to adjust the impedance of the antenna element 100, and can be used to achieve impedance matching of the antenna element 100 in the first resonant mode, the second resonant mode, and the third resonant mode.

[0056] The electronic device 1000 provided in this application includes a reference ground plane 200 and an antenna unit 100. The antenna unit 100 includes an antenna radiator 10, a feed 20, a first tuning circuit 30, and a first grounding element 40. One end of the antenna radiator 10 is formed as a free end 11, and the other end is formed as a grounding end 12. A feed point 13 and an electrical connection point 14 located on the side of the feed point 13 away from the free end 11 are designed between the grounding end 12 and the free end 11. The feed point 13 is electrically connected to the feed 20 through the first tuning circuit 30. One end of the first grounding element 40 is electrically connected to the electrical connection point 14, and the other end of the first grounding element 40 is electrically connected to the reference ground plane 200. This allows for communication between the feed 20, the first tuning circuit 30, the grounding end 12, and the free end 11. The antenna radiator 10 forms an inverted F-shaped antenna, which allows the feed 20, the first tuning circuit 30, the first grounding element 40, and the antenna radiator 10 between the electrical connection point 14 and the free end 11 to form another inverted F-shaped antenna. Thus, when the antenna radiator 10 between the first grounding element 40, the grounding end 12, and the free end 11 generates a first resonant mode under the excitation of the feed 20; when the antenna radiator 10 between the first grounding element 40, the electrical connection point 14, and the free end 11 generates a second resonant mode under the excitation of the feed 20; and when the antenna radiator 10 between the feed point 13 and the free end 11 generates a third resonant mode under the excitation of the feed 20, the antenna element 100 supports the first, second, and third frequency bands, thus broadening the communication frequency band of the electronic device 1000. Since no parasitic radiating branches are added, but rather different types of antenna elements 100 are formed and multiple resonant modes are generated by adding the first grounding element 40, the structural design of the antenna element 100 is simpler, more flexible, and more conducive to miniaturization.

[0057] Among them, such as Figure 7 As shown, the first frequency band is lower than the second frequency band. The second frequency band is lower than the third frequency band. The first resonant mode includes a 1 / 4 wavelength mode generated by the antenna radiator 10 between the first grounding element 40, the electrical connection point 14, and the free end 11, and a 1 / 4 wavelength mode generated by the antenna radiator 10 between the grounding end 12 and the free end 11. The second resonant mode is a 1 / 4 wavelength mode. The third resonant mode is a 1 / 4 wavelength mode.

[0058] Understandably, the sum of the length of the first grounding component 40 and the length of the antenna radiator 10 between the electrical connection point 14 and the free end 11 is 1 / 4 wavelength of the second frequency band. The length of the first grounding component 40 can be referenced in the appendix. Figure 7 The length of the antenna radiator 10 between the electrical connection point 14 and the free end 11, as shown in L1, can be referenced in the appendix. Figure 7L2 is shown. In the following embodiments, the sum of the length of the first grounding member 40 and the length of the antenna radiator 10 between the electrical connection point 14 and the free end 11 is also described as the overall length of the first inverted F-shaped antenna. For example, when the second frequency band is a mid-to-high frequency band (1GHz to 3GHz), the overall length of the first inverted F-shaped antenna can be 30mm to 60mm.

[0059] The length of the antenna radiator 10 between the grounding end 12 and the free end 11 is 1 / 4 wavelength of the target frequency band. The target frequency band is lower than the first frequency band. The length of the antenna radiator 10 between the grounding end 12 and the free end 11 can be referenced in the appendix. Figure 7 L3 is shown. It is understood that the length of the antenna radiator 10 between the grounding terminal 12 and the free terminal 11 is the overall length of the antenna radiator 10, which is also described in the following embodiments as the overall length of the second inverted-F antenna. For example, when the target frequency band is a mid-to-high frequency band, the overall length of the second inverted-F antenna can be 30mm to 60mm. Since the target frequency band is lower than the first frequency band, and the first frequency band is lower than the second frequency band, the overall length of the second inverted-F antenna can be longer than the overall length of the first inverted-F antenna. It is understood that the first resonant mode is a hybrid mode formed by the quarter-wavelength mode of the first inverted-F antenna and the quarter-wavelength mode of the second inverted-F antenna.

[0060] The length of the antenna radiator 10 between the feed point 13 and the free end 11 is 1 / 4 wavelength of the third frequency band. The length of the antenna radiator 10 between the feed point 13 and the free end 11 can be referenced in the appendix. Figure 7 L4 is shown. For example, when the third frequency band is an ultra-high frequency band (greater than 3 GHz), the length of the antenna radiator 10 between the feed point 13 and the free end 11 can be 10 mm to 30 mm.

[0061] Since the feed 20, the first tuning circuit 30, the antenna radiator 10 between the electrical connection point 14 and the free end 11, and the first grounding element 40 form a first inverted F-type antenna, the antenna radiator 10 between the first grounding element 40, the electrical connection point 14 and the free end 11 is more likely to generate a second resonant mode supporting 1 / 4 wavelength of the second frequency band under the excitation of the feed 20. The second resonant mode is a fundamental mode of the first inverted F-type antenna. The antenna radiator 10 between the feed point 13 and the free end 11 is more likely to generate a third resonant mode supporting 1 / 4 wavelength of the third frequency band under the excitation of the feed 20. The third resonant mode is another fundamental mode of the first inverted F-type antenna. Furthermore, since the electrical connection point 14 is located on the side of the feed point 13 away from the free end 11, the sum of the length of the first grounding member 40 and the length of the antenna radiator 10 between the electrical connection point 14 and the free end 11 must be longer than the length of the antenna radiator 10 between the feed point 13 and the free end 11. Therefore, the second frequency band supported by the second resonant mode is lower than the third frequency band supported by the third resonant mode, which is easier to implement and can reduce the design difficulty of the first tuning circuit 30.

[0062] Since the feed 20, the first tuning circuit 30, and the antenna radiator 10 between the grounding terminal 12 and the free end 11 form a second inverted F-shaped antenna, the antenna radiator 10 between the grounding terminal 12 and the free end 11 is also prone to generating a 1 / 4 wavelength mode that supports the target frequency band under the excitation of the feed 20. Since the length of the antenna radiator 10 between the grounding terminal 12 and the free end 11 is longer than the length of the antenna radiator 10 between the feed point 13 and the free end 11, it is easier to achieve the target frequency band that is lower than the third frequency band supported by the third resonant mode, and it can reduce the design difficulty of the first tuning circuit 30.

[0063] When the target frequency band is lower than the third frequency band and the second frequency band is lower than the third frequency band, the first resonant mode is a hybrid mode formed by the 1 / 4 wavelength mode supporting the second frequency band formed by the first inverted F-type antenna and the 1 / 4 wavelength mode supporting the target frequency band formed by the second inverted F-type antenna. That is, the first frequency band is located between the target frequency band and the second frequency band, thus making the target frequency band lower than the second frequency band, thereby making the first frequency band lower than the second frequency band, which is more conducive to the formation of a wide bandwidth by the first frequency band, the second frequency band and the third frequency band.

[0064] In summary, by enabling the first resonant mode generated by the antenna radiator 10 between the first grounding element 40, the grounding end 12, and the free end 11 under the excitation of the feed source 20 to support a relatively low first frequency band; enabling the second resonant mode generated by the antenna radiator 10 between the first grounding element 40, the electrical connection point 14, and the free end 11 under the excitation of the feed source 20 to support a relatively high second frequency band; and enabling the third resonant mode generated by the antenna radiator 10 between the feed point 13 and the free end 11 under the excitation of the feed source 20 to support a higher third frequency band, the design difficulty of the first tuning circuit 30 is reduced. Furthermore, by having the first resonant mode generated by the antenna radiator 10 between the first grounding element 40, grounding end 12, and free end 11 under the excitation of the feed source 20 support a relatively low first frequency band; by having the second resonant mode generated by the antenna radiator 10 between the first grounding element 40, grounding end 12, and free end 11 under the excitation of the feed source 20 support a relatively high second frequency band; and by having the third resonant mode generated by the antenna radiator 10 between the feed point 13 and free end 11 under the excitation of the feed source 20 support a higher third frequency band, the impedance value variation range of the antenna element 100 can be made larger, which is more conducive to the formation of a wide bandwidth among the first, second, and third frequency bands. Of course, in other possible embodiments, the second frequency band can also be lower than the target frequency band, and thus the second frequency band can also be lower than the first frequency band.

[0065] Furthermore, such as Figure 8 As shown, the antenna radiator 10 between the first grounding element 40, the grounding end 12, and the free end 11, under the excitation of the feed 20, also generates a first intermediate mode supporting the fourth frequency band. The fourth frequency band is located between the first and second frequency bands.

[0066] For example: the first frequency band, the fourth frequency band, and the second frequency band can all be low-frequency bands (less than 1 GHz), with the first frequency band being lower than the fourth frequency band and the fourth frequency band being lower than the second frequency band; or, the first frequency band, the fourth frequency band, and the second frequency band can all be mid-to-high frequency bands, with the first frequency band being lower than the fourth frequency band and the fourth frequency band being lower than the second frequency band; or, the first frequency band can be a low-frequency band, the fourth frequency band and the second frequency band can be mid-to-high frequency bands, with the fourth frequency band being lower than the second frequency band; or, the first frequency band and the fourth frequency band can be mid-to-high frequency bands, with the first frequency band being lower than the fourth frequency band, and the second frequency band can be a high-frequency band, etc.

[0067] By causing the antenna radiator 10 between the first grounding element 40, the grounding end 12 and the free end 11 to generate a first intermediate mode supporting the fourth frequency band under the excitation of the feed source 20, the fourth frequency band is located between the first frequency band and the second frequency band, which can form a continuous broadband between the first frequency band, the fourth frequency band and the second frequency band, avoiding the occurrence of frequency bands that cannot be covered or can be covered but have poor signal when the bandwidth of the first frequency band and / or the bandwidth of the second frequency band is narrow, that is, avoiding discontinuity between the first frequency band and the second frequency band.

[0068] like Figure 8 As shown, Figure 8 The dashed line illustrates the resonant current distribution of the first intermediate mode. The first intermediate mode includes a first resonant current generated by the antenna radiator 10 between the first grounding element 40, the electrical connection point 14, and the free end 11, and a second resonant current generated by the antenna radiator 10 between the grounding end 12 and the electrical connection point 14. The intensity of the second resonant current is weaker than that of the first resonant current. It can be understood that the first resonant current of the first intermediate mode is the sum of a portion of the resonant current generated by the antenna radiator 10 between the electrical connection point 14 and the free end 11 in the 1 / 4 wavelength mode, and a portion of the resonant current from the second resonant mode. The second resonant current of the first intermediate mode is the sum of a portion of the resonant current generated by the antenna radiator 10 between the grounding end 12 and the electrical connection point 14 in the 1 / 4 wavelength mode. In short, the first intermediate mode can be understood as a hybrid mode formed by the quarter-wavelength mode generated by the antenna radiator 10 between the ground terminal 12 and the free terminal 11 and the second resonant mode; that is, the first intermediate mode is also a hybrid mode formed by the quarter-wavelength mode of the first inverted-F antenna and the quarter-wavelength mode of the second inverted-F antenna. The difference between the first intermediate mode and the first resonant mode is that the resonant current generated by the first inverted-F antenna in the first intermediate mode is stronger than the resonant current generated by the first inverted-F antenna in the first resonant mode, and / or, the resonant current generated by the second inverted-F antenna in the first intermediate mode is weaker than the resonant current generated by the second inverted-F antenna in the first resonant mode.

[0069] Obviously, since the path length of the resonant current in the first intermediate mode is the same as that in the first resonant mode, it is easier to implement the fourth frequency band between the first and second frequency bands than to place the fourth frequency band between the second and third frequency bands, and it also reduces the design difficulty of the first tuning unit.

[0070] In one possible embodiment, the first and second frequency bands are located in the mid-to-high frequency band. The third frequency band is located in the ultra-high frequency band. The fourth frequency band is located between the first and second frequency bands. By placing the first and second frequency bands in the mid-to-high frequency band, the fourth frequency band between the first and second frequency bands, and the third frequency band in the ultra-high frequency band, the antenna element 100 can support a wider range of mid-to-high frequency bands and also support the ultra-high frequency band. The first, second, and fourth frequency bands can form a wideband. In one possible embodiment, the S11 parameter of the first frequency band is less than -2dB, the S11 parameter of the second frequency band is less than -2dB, and the S11 parameter of the fourth frequency band is less than -2dB. The first, second, and fourth frequency bands can form a wideband of 0.5GHz to 1.5GHz. In other words, the bandwidth of the antenna element 100 with an S11 parameter less than -2dB can reach 0.5GHz to 2GHz.

[0071] Furthermore, such as Figure 9 As shown, the antenna radiator 10 between the first grounding element 40, the electrical connection point 14, and the free end 11, under the excitation of the feed source 20, also generates a second intermediate mode supporting the fifth frequency band. The fifth frequency band is located between the second and third frequency bands.

[0072] For example: the second, fifth, and third frequency bands can all be low-frequency bands, with the second frequency band lower than the fifth frequency band and the fifth frequency band lower than the third frequency band; or, the second, fifth, and third frequency bands can all be mid-to-high frequency bands, with the second frequency band lower than the fifth frequency band and the fifth frequency band lower than the third frequency band; or, the second frequency band can be a low-frequency band, the fifth and third frequency bands can be mid-to-high frequency bands, with the fifth frequency band lower than the third frequency band; or, the second and fifth frequency bands can be mid-to-high frequency bands, with the second frequency band lower than the fifth frequency band, and the third frequency band can be a high-frequency band, etc.

[0073] By causing the antenna radiator 10 between the first grounding element 40, the electrical connection point 14 and the free end 11 to generate a second intermediate mode supporting the fifth frequency band under the excitation of the feed source 20, the fifth frequency band is located between the second and third frequency bands, which can form a continuous broadband between the second, fifth and third frequency bands. This avoids the occurrence of frequency bands that cannot be covered or can be covered but have poor signal when the bandwidth of the second and / or third frequency bands is narrow, that is, avoids discontinuity between the second and third frequency bands.

[0074] like Figure 9 As shown, Figure 9The dashed line illustrates the resonant current distribution of the second intermediate mode. The second intermediate mode includes a third resonant current generated by the antenna radiator 10 between the feed point 13 and the free end 11, and a fourth resonant current generated by the antenna radiator 10 between the first grounding member 40, the electrical connection point 14, and the feed point 13. The direction of the fourth resonant current is the same as that of the third resonant current, and the intensity of the fourth resonant current is weaker than that of the third resonant current.

[0075] Specifically, the third resonant current of the second intermediate mode is the resonant current formed by the superposition of a portion of the resonant current on the antenna radiator 10 between the feed point 13 and the free end 11 in the second resonant mode, and a portion of the resonant current in the third resonant mode. The fourth resonant current of the second intermediate mode is the portion of the resonant current on the antenna radiator 10 between the first grounding element 40, the electrical connection point 14, and the feed point 13 in the second resonant mode. In short, the second intermediate mode can be understood as a hybrid mode formed by the second resonant mode and the third resonant mode.

[0076] Obviously, since the path length of the resonant current in the second intermediate mode is the same as that in the second resonant mode, and the second intermediate mode is a hybrid mode formed by the second resonant mode and the third resonant mode, it is easier to realize that the fifth frequency band is located between the second and third frequency bands and it is easier to reduce the design difficulty of the first tuning unit.

[0077] In one possible embodiment, the second frequency band is located in the mid-to-high frequency band. The third frequency band is located in the ultra-high frequency band. The fifth frequency band is located between the second and third frequency bands. The fifth frequency band may be partially located in the mid-to-high frequency band and partially in the ultra-high frequency band. By positioning the second frequency band in the mid-to-high frequency band, the third frequency band in the ultra-high frequency band, and the fifth frequency band between the second and third frequency bands, a continuous wideband can be formed between the mid-to-high frequency band and the ultra-high frequency band supported by the antenna element 100. In one possible embodiment, the S11 parameter of the second frequency band is less than -2dB, the S11 parameter of the third frequency band is less than -2dB, and the S11 parameter of the fifth frequency band is less than -2dB. The second, third, and fifth frequency bands can form a wideband of 0.7GHz to 2GHz. In other words, the bandwidth of the antenna element 100 with an S11 parameter less than -2dB can reach 0.7GHz to 2GHz.

[0078] Furthermore, such as Figure 10 As shown, the antenna radiator 10 between the first grounding element 40, the electrical connection point 14, and the free end 11, under the excitation of the feed source 20, also generates a third intermediate mode supporting the sixth frequency band. The sixth frequency band is higher than the third frequency band.

[0079] For example: the third and sixth frequency bands can both be low frequency bands, with the sixth frequency band being higher than the third frequency band; or, the third and sixth frequency bands can both be mid-to-high frequency bands, with the sixth frequency band being higher than the third frequency band; or, the third and sixth frequency bands can both be overclocking frequency bands, with the sixth frequency band being higher than the third frequency band; or, the third frequency band can be a mid-to-high frequency band, and the sixth frequency band can be a high frequency band, etc.

[0080] By causing the antenna radiator 10 between the first grounding element 40, the electrical connection point 14 and the free end 11 to generate a third intermediate mode supporting the sixth frequency band under the excitation of the feed source 20, the sixth frequency band is higher than the third frequency band, which can make the third frequency band and the sixth frequency band form a wideband, so that the first frequency band, the second frequency band, the third frequency band, the fourth frequency band, the fifth frequency band and the sixth frequency band can form a wider frequency band, thereby widening the bandwidth of the antenna element 100.

[0081] like Figure 10 As shown, Figure 10 The dashed line illustrates the resonant current distribution of the third intermediate mode. The third intermediate mode includes a fifth resonant current generated by the antenna radiator 10 between the feed point 13 and the free end 11, and a sixth resonant current generated by the antenna radiator 10 between the first grounding element 40, the electrical connection point 14, and the feed point 13. The direction of the sixth resonant current is opposite to that of the fifth resonant current, and the intensity of the sixth resonant current is weaker than that of the fifth resonant current.

[0082] Specifically, the fifth resonant current of the third intermediate mode is a partial resonant current of the third resonant mode. The sixth resonant current of the third intermediate mode is the reverse resonant current generated on the antenna radiator 10 between the first grounding element 40, the electrical connection point 14 and the feed point 13.

[0083] In one possible embodiment, the third frequency band is located in the ultra-high frequency band, and the sixth frequency band is located in the ultra-high frequency band but higher than the third frequency band. By placing the third frequency band in the ultra-high frequency band and the sixth frequency band in the ultra-high frequency band but higher than the third frequency band, the antenna element 100 can support a wider and more continuous ultra-high frequency band coverage.

[0084] The difference between the impedance value of the antenna radiator 10 between the grounding terminal 12 and the electrical connection point 14 and the impedance value of the first grounding component 40 is less than or equal to a preset difference.

[0085] Specifically, the material, width, and length of the first grounding component 40 are designed so that the difference between the impedance value of the antenna radiator 10 between the grounding terminal 12 and the electrical connection point 14 and the impedance value of the first grounding component 40 is less than or equal to a preset difference. The material of the first grounding component 40 can be metal, alloy, etc. The width of the first grounding component 40 can be less than or equal to the width of the antenna radiator 10 between the grounding terminal 12 and the electrical connection point 14. The length of the first grounding component 40 can be greater than or equal to the length of the antenna radiator 10 between the grounding terminal 12 and the electrical connection point 14. The preset difference design must ensure that a portion of the resonant current in the first resonant mode and the resonant current in the first intermediate mode can return to ground through the electrical connection point 14 and the grounding circuit, while the other portion of the resonant current can return to ground through the grounding terminal 12. In other words, the preset difference design must ensure that the antenna radiator 10 between the grounding terminal 12 and the electrical connection point 14 is not short-circuited. In one possible implementation, the difference between the impedance value of the antenna radiator 10 between the grounding terminal 12 and the electrical connection point 14 and the impedance value of the first grounding member 40 can be less than or equal to 5 ohms. For example, the impedance value of the antenna radiator 10 between the grounding terminal 12 and the electrical connection point 14 can be equal to the impedance value of the first grounding member 40, that is, the difference between the impedance value of the antenna radiator 10 between the grounding terminal 12 and the electrical connection point 14 and the impedance value of the first grounding member 40 can be equal to zero.

[0086] By making the difference between the impedance value of the antenna radiator 10 between the grounding terminal 12 and the electrical connection point 14 and the impedance value of the first grounding component 40 less than or equal to a preset difference, it is possible to achieve, without modification or with simple modification, the first grounding component 40 and the antenna radiator 10 between the grounding terminal 12 and the free end 11 generate a first resonant mode supporting the first frequency band under the excitation of the feed source 20, and to achieve the first intermediate mode supporting the fourth frequency band under the excitation of the feed source 20.

[0087] In one possible embodiment, such as Figure 11 As shown, the first grounding element 40 is a grounding wire. The first grounding element 40 can be arranged parallel to the antenna radiator 10 or intersecting with the antenna radiator 10. In the following embodiments, the first grounding element 40 is arranged parallel to the antenna radiator 10 as an example. Arranging the first grounding element 40 parallel to the antenna radiator 10 is easier to implement in electronic devices such as mobile phones 1000. In this embodiment, the first grounding element 40 is designed as a grounding wire. Since the grounding wire can be considered a purely impedance element for alternating current, without introducing parasitic parameters, compared to a grounding circuit with inductors and / or capacitors in the first grounding element 40, the antenna unit 100 has higher radiation efficiency and achieves better broadband performance.

[0088] like Figure 11 As shown, the antenna unit 100 also includes a second grounding component 60. The second grounding component 60 can be a grounding wire or a grounding circuit with inductors and / or capacitors. The second grounding component 60 is electrically connected between the grounding terminal 12 and the reference ground plane 200. In other words, one end of the second grounding component 60 is electrically connected to the grounding terminal 12, and the other end is electrically connected to the reference ground plane 200. The second grounding component 60 can be directly electrically connected to the grounding terminal 12, or indirectly electrically connected through conductive components such as metal springs. The following embodiments use the direct electrical connection between the second grounding component 60 and the grounding terminal 12, and the direct electrical connection between the second grounding component 60 and the reference ground plane 200 as examples.

[0089] The antenna unit 100 in this embodiment generates the second resonant mode, third resonant mode, second intermediate mode, and third intermediate mode in the same way as the antenna unit 100 in the embodiment where the ground terminal 12 is directly electrically connected to the reference ground 200. The difference lies in that: in this embodiment, the first grounding member 40, the second grounding member 60, and the antenna radiator 10 between the ground terminal 12 and the free end 11 generate the first resonant mode under the excitation of the feed source; and in this embodiment, the first grounding member 40, the second grounding member 60, and the antenna radiator 10 between the ground terminal 12 and the free end 11 generate the first intermediate mode under the excitation of the feed source. It can be understood that the first resonant mode and the first intermediate mode of the antenna unit 100 in this embodiment include the resonant current generated by the first grounding member 40 and the antenna radiator 10 between the ground terminal 12 and the free end 11, and also include the resonant current generated by the second grounding member 60.

[0090] The sum of the impedance value of the second grounding component 60 and the impedance value of the antenna radiator 10 between the grounding terminal 12 and the electrical connection point 14 is the target impedance value. The difference between the target impedance value and the impedance value of the first grounding component 40 is less than or equal to a preset difference.

[0091] Specifically, by designing the material, width, and length of the first grounding component 40 and the second grounding component 60, the difference between the target impedance value and the impedance value of the first grounding component can be less than or equal to a preset difference. The material of the second grounding component 60 can be metal, alloy, etc. The material of the second grounding component 60 can be the same as or different from that of the first grounding component 40. The width of the second grounding component 60 can be the same as or different from that of the first grounding component 40. The length of the second grounding component 60 can be the same as or different from that of the first grounding component 40. In this embodiment, the design of the preset difference still needs to satisfy that a portion of the resonant current in the first resonant mode and the resonant current in the first intermediate mode can return to ground through the electrical connection point 14 and the grounding circuit, while another portion of the resonant current can return to ground through the grounding terminal 12 and the second grounding component 60. That is, the design of the preset difference needs to ensure that the antenna radiator 10 between the grounding terminal 12 and the electrical connection point 14, and the second grounding component 60, will not be short-circuited. In one possible implementation, the difference between the target impedance value and the impedance value of the first grounding element 40 can be less than or equal to 5 ohms. For example, the target impedance value and the impedance value of the first grounding element 40 can be equal, that is, the difference between the target impedance value and the impedance value of the first grounding element 40 can be equal to zero.

[0092] In an embodiment where the difference between the target impedance value and the impedance value of the first grounding element 40 is less than or equal to a preset difference, and the grounding terminal 12 and the reference ground 200 are electrically connected via the second grounding element 60, the first grounding element 40, the second grounding element 60, and the antenna radiator 10 between the grounding terminal 12 and the free end 11 can generate a first resonant mode supporting the first frequency band under the excitation of the feed source 20, and the first grounding element 40, the second grounding element 60, and the antenna radiator 10 between the grounding terminal 12 and the free end 11 can generate a first intermediate mode supporting the fourth frequency band under the excitation of the feed source 20.

[0093] Optionally, the second grounding element 60 is a grounding wire. The second grounding element 60 can be arranged parallel to or intersect with the antenna radiator 10. The following embodiment uses the parallel arrangement of the second grounding element 60 with the antenna radiator 10 as an example. This parallel arrangement is easier to implement in electronic devices such as mobile phones 1000. In this embodiment, the second grounding element 60 is designed as a grounding wire. Since a grounding wire can be considered a purely impedance element for alternating current, without introducing parasitic parameters, compared to a grounding circuit with inductors and / or capacitors, the antenna unit 100 has higher radiation efficiency and achieves better broadband performance.

[0094] The length of the second grounding element 60 is less than the length of the first grounding element 40. The length of the second grounding element 60 can be referenced in the appendix. Figure 11As shown in L5. In this embodiment, the first grounding component 40 and the second grounding component 60 can be grounded wires, that is, the materials of the first grounding component 40 and the second grounding component 60 are the same, and the width of the first grounding component 40 and the width of the second grounding component 60 are the same or nearly the same. The sum of the impedance value of the second grounding component 60 and the impedance value of the antenna radiator 10 between the grounding terminal 12 and the electrical connection point 14 is the target impedance value. The difference between the target impedance value and the impedance value of the first grounding component 40 is less than or equal to a preset difference.

[0095] In one possible embodiment, such as Figure 12 As shown, the sum of the length of the first grounding element 40 and the length of the antenna radiator 10 between the electrical connection point 14 and the feed point 13 is greater than or equal to 1 / 16 of the wavelength of the first frequency band, and less than or equal to 3 / 16 of the wavelength of the first frequency band. The length of the first grounding element 40 can be referenced in the appendix. Figure 12 As shown in L1. The length of the antenna radiator 10 between the electrical connection point 14 and the feed point 13 can be referred to in the appendix. Figure 12 As shown in L6. It is understood that the sum of the length of the first grounding element 40 and the length of the antenna radiator 10 between the electrical connection point 14 and the feed point 13 can be greater than or equal to 1 / 4 of the overall length of the first inverted-F antenna, and less than or equal to 3 / 4 of the overall length of the first inverted-F antenna. For example, when the overall length of the first inverted-F antenna is 30mm to 60mm, the sum of the length of the first grounding element 40 and the length of the antenna radiator 10 between the electrical connection point 14 and the feed point 13, i.e., the sum of L1 and L6, can be 7.5mm to 45mm.

[0096] By ensuring that the sum of the length of the first grounding element 40 and the length of the antenna radiator 10 between the electrical connection point 14 and the feed point 13 is greater than or equal to 1 / 16 of the wavelength of the first frequency band and less than or equal to 3 / 16 of the wavelength of the first frequency band, it is possible to achieve, without modification or with simple modification, the generation of a second resonant mode supporting the second frequency band by the first grounding element 40, the antenna radiator 10 between the electrical connection point 14 and the free end 11 under the excitation of the feed source 20; and to achieve the generation of a third resonant mode supporting the third frequency band by the antenna radiator 10 between the feed point 13 and the free end 11 under the excitation of the feed source 20.

[0097] Please refer to Figure 13 and Figure 14The reference floor 200 includes a first edge 21 and a second edge 22 that are bent and connected. The junction of the first edge 21 and the second edge 22 forms a floor corner point 25. The antenna radiator 10 is located on the side of the first edge 21 away from the center of the reference floor 200; or, the antenna radiator 10 includes a first radiating segment 101 and a second radiating segment 102 that are bent and connected. The first radiating segment 101 is located on the side of the first edge 21 away from the center of the reference floor 200, and the second radiating segment 102 is located on the side of the second edge 22 away from the center of the reference floor 200.

[0098] This application does not specifically limit the bending method between the first edge 21 and the second edge 22. For example, the first edge 21 and the second edge 22 can be bent at a right angle; or, the first edge 21 and the second edge 22 can be bent in an arc; or, the first edge 21 and the second edge 22 can be bent in an irregular shape, etc. The following embodiments take the bending of the first edge 21 and the second edge 22 at a right angle as an example. In one possible implementation, the reference floor 200 may include a first edge 21, a second edge 22, a third edge 23, and a fourth edge 24 connected end to end in sequence. The first edge 21 and the third edge 23 are arranged opposite to each other. The second edge 22 and the fourth edge 24 are arranged opposite to each other. In the embodiments of this application, the first edge 21 and the third edge 23 are arranged opposite to each other along the Y-axis direction; the second edge 22 and the fourth edge 24 are arranged opposite to each other along the X-axis direction as an example. It can be understood that the first edge 21 and the third edge 23 are arranged opposite to each other along the width direction of the electronic device 1000. The second edge 22 and the fourth edge 24 are arranged opposite to each other along the length direction of the electronic device 1000. Of course, in other possible implementations, the first edge 21 and the third edge 23 may be arranged opposite each other along the length direction of the electronic device 1000; the second edge 22 and the fourth edge 24 may be arranged opposite each other along the width direction of the electronic device 1000.

[0099] In one possible embodiment, such as Figure 13 As shown, the antenna radiator 10 is located on the side of the first edge 21 away from the center of the reference ground 200. In this embodiment, placing the antenna radiator 10 on one side of the reference ground 200 is beneficial because the antenna radiator 10 mainly excites the resonant current along the first edge 21, thereby making the radiated energy of the antenna radiator 10 more concentrated, which is beneficial to extending the radiation distance of the antenna element 100.

[0100] In another possible embodiment, such as Figure 14As shown, the antenna radiator 10 includes a first radiating segment 101 and a second radiating segment 102 that are bent and connected. This application does not specifically limit the bending method between the first radiating segment 101 and the second radiating segment 102. For example, the first radiating segment 101 and the second radiating segment 102 can be bent at a right angle; or, the first radiating segment 101 and the second radiating segment 102 can be bent in an arc shape; or, the first radiating segment 101 and the second radiating segment 102 can be bent in an irregular shape, etc. In the following embodiment, a right-angled bend between the first radiating segment 101 and the second radiating segment 102 is taken as an example. The end of the first radiating segment 101 away from the second radiating segment 102 forms the free end 11. The end of the second radiating segment 102 away from the first radiating segment 101 forms the ground end 12. The first radiating segment 101 is located on the side of the first edge 21 away from the center of the reference ground 200. It can be understood that the first radiating segment 101 is located on the side of the first edge 21 away from the third edge 23. A clearance area may exist between the first radiating segment 101 and the reference floor 200. The second radiating segment 102 is located on the side of the second edge 22 facing away from the center of the reference floor 200. It is understood that the second radiating segment 102 is located on the side of the second edge 22 furthest from the fourth edge 24. A clearance area may exist between the second radiating segment 102 and the reference floor 200.

[0101] In this embodiment, the antenna radiator 10 is positioned at a corner of the reference ground plane 200. This allows the antenna radiator 10 to excite ground currents along the first edge 21 and the second edge 22 on the reference ground plane 200, resulting in a more uniform current distribution on the reference ground plane 200 and accommodating radiation in two orthogonal directions. It also helps to reduce Specific Absorption Ratio (SAR) hotspots, thereby lowering the SAR value of the electronic device 1000. Furthermore, positioning the antenna radiator 10 at a corner of the reference ground plane 200, enabling it to excite ground currents along the first edge 21 and the second edge 22, also reduces the reverse current on the reference ground plane 200, thereby improving the radiation efficiency of the antenna element 100.

[0102] like Figure 15 As shown, the antenna element 100 excites a first ground current along the first edge 21 and a second ground current along the second edge 22 on the reference ground 200. Figure 15 The dashed line a indicates the first ground current excited by the antenna element 100 along the first edge 21 on the reference ground plane 200. Figure 15The dashed line b indicates the second ground current excited by antenna element 100 along the second edge 22 on reference ground 200. It should be noted that the first ground current along the first edge 21 in this application can be a current parallel to the first edge 21 or a current nearly parallel to the first edge 21. The second ground current along the second edge 22 can be a current parallel to the second edge 22 or a current nearly parallel to the second edge 22. Of course, antenna element 100 can also excited a third ground current c in a direction similar to the first ground current, a fourth ground current d in a direction similar to the second ground current, and a fifth ground current e located between the third and fourth ground currents on reference ground 200, etc.

[0103] Antenna element 100 excites a first ground current along the first edge 21 and a second ground current along the second edge 22 on the reference ground 200. This can be achieved by a first resonant mode of antenna element 100 exciting a first ground current along the first edge 21 and a second ground current along the second edge 22 on the reference ground 200; and / or, a second resonant mode of antenna element 100 exciting a first ground current along the first edge 21 and a second ground current along the second edge 22 on the reference ground 200; and / or, a third resonant mode of antenna element 100 exciting a first ground current along the first edge 21 and a second ground current along the second edge 22 on the reference ground 200. The first ground current and the second ground current along the second edge 22 of the antenna element 100; and / or, the first intermediate mode of the antenna element 100 excites the first ground current along the first edge 21 and the second ground current along the second edge 22 on the reference ground 200; and / or, the second intermediate mode of the antenna element 100 excites the first ground current along the first edge 21 and the second ground current along the second edge 22 on the reference ground 200; and / or, the third intermediate mode of the antenna element 100 excites the first ground current along the first edge 21 and the second ground current along the second edge 22 on the reference ground 200.

[0104] Since the antenna element 100 excites a first ground current along the first edge 21 and a second ground current along the second edge 22 on the reference ground 200, the antenna element 100 can take into account both radiation along the first edge 21 and radiation along the second edge 22, that is, radiation in both directions. In this embodiment, when the first edge 21 and the second edge 22 are bent at a right angle, the antenna element 100 takes into account radiation in two orthogonal directions, which is beneficial for achieving omnidirectional coverage. In addition, the antenna element 100 excites a first ground current along the first edge 21 and a second ground current along the second edge 22 on the reference ground 200, so that the radiated energy of the antenna element 100 is dispersed on the periphery of the first edge 21 and the periphery of the second edge 22, which can form multiple SAR hotspots and reduce the SAR value in one direction.

[0105] In one possible embodiment, the intensity of the first floor current is stronger than the intensity of the second floor current. For example, the intensity of the first floor current is stronger than the intensity of the second floor current, and the intensity of the third floor current is stronger than the intensity of the fourth floor current.

[0106] In this application, the strength of the first ground current being stronger than the strength of the second ground current may include the strength of the first ground current in a first resonant mode being stronger than the strength of the second ground current; and / or, the strength of the first ground current in a second resonant mode being stronger than the strength of the second ground current; and / or, the strength of the first ground current in a third resonant mode being stronger than the strength of the second ground current; and / or, the strength of the first ground current in a first intermediate mode being stronger than the strength of the second ground current; and / or, the strength of the first ground current in a second intermediate mode being stronger than the strength of the second ground current; and / or, the strength of the first ground current in a third intermediate mode being stronger than the strength of the second ground current.

[0107] When the extension direction of the first edge 21 of the reference ground 200 is the same as or similar to the length direction of the electronic device 1000, the intensity of the first ground current is stronger than the intensity of the second ground current, which can increase the radiated energy of the antenna element 100 in the length direction of the electronic device 1000. For electronic devices such as mobile phones, the more radiated energy along the length direction of the electronic device 1000, the more beneficial it is to improving the radiation efficiency of the electronic device 1000. When the extension direction of the first edge 21 of the reference ground 200 is the same as or similar to the width direction of the electronic device 1000, the intensity of the first ground current is stronger than the intensity of the second ground current, which can increase the radiated energy of the antenna element 100 in the width direction of the electronic device 1000. For electronic devices such as mobile phones, the more radiated energy along the width direction of the electronic device 1000, the more beneficial it is to improving the anti-grip performance of the electronic device 1000.

[0108] Optionally, the grounding terminal 12 is located on the side of the free end 11 near the floor corner 25, and / or, the other end of the first grounding member 40 is located on the side of one end of the grounding member 40 near the floor corner 25.

[0109] In one possible embodiment, such as Figure 16As shown, the grounding terminal 12 is located on the side of the free end 11 near the floor corner 25. Since the grounding terminal 12 is the return point of part of the resonant current of the first resonant mode of the second inverted F-type antenna, placing the grounding terminal 12 on the side of the free end 11 near the floor corner 25 is beneficial for the first resonant mode of the antenna element 100 to excite the first floor current along the first edge 21 and the second floor current along the second edge 22 on the reference floor 200. This allows the first resonant mode of the antenna element 100 to take into account radiation in two orthogonal directions, improving the radiation omnidirectionality of the first resonant mode of the antenna element 100, making the resonant current distribution of the first resonant mode of the antenna element 100 more uniform, forming multiple SAR hotspots, and reducing the SAR value of the first resonant mode. Specifically, when the grounding terminal 12 is electrically connected to the reference floor 200 through the second grounding member 60, the end of the second grounding member 60 electrically connected to the reference floor 200 is closer to the floor corner 25 than the end of the second grounding member 60 electrically connected to the grounding terminal 12.

[0110] Furthermore, since part of the resonant current of the first intermediate mode also returns to ground through the ground terminal 12, placing the ground terminal 12 on the side of the free end 11 near the floor corner 25 is also beneficial for the first intermediate mode of the antenna element 100 to excite the first floor current along the first edge 21 and the second floor current along the second edge 22 on the reference floor 200. This allows the first intermediate mode of the antenna element 100 to take into account radiation in two orthogonal directions, improve the radiation omnidirectionality of the first intermediate mode of the antenna element 100, make the resonant current distribution of the first intermediate mode of the antenna element 100 more uniform, form multiple SAR hot spots, and reduce the SAR value of the first intermediate mode.

[0111] Optional, such as Figure 16 As shown, the distance between the projection point of the ground terminal 12 on the reference ground plane 200 and the corner point 25 of the ground plane is less than or equal to 1 / 16 of the wavelength of the first frequency band. The distance between the projection point of the ground terminal 12 on the reference ground plane 200 and the corner point 25 of the ground plane can be referred to in the attached diagram. Figure 16 As shown in L7. For example, when the first frequency band is a mid-to-high frequency band, the distance between the projection point of the grounding terminal 12 on the reference ground 200 and the corner point 25 of the ground can be less than or equal to 15mm. Specifically, when the grounding terminal 12 is electrically connected to the reference ground 200 through the second grounding member 60, the distance between the projection point of the second grounding member 60 on the reference ground 200 and the corner point 25 of the ground is less than or equal to 1 / 16 of the wavelength of the first frequency band.

[0112] When the distance between the projection point of the ground terminal 12 on the reference ground plane 200 and the corner point 25 of the ground plane is less than or equal to 1 / 16 of the wavelength of the first frequency band, the distance between the ground terminal 12 and the corner point 25 of the ground plane is small. The current distribution of the first resonant mode and the first intermediate mode of the antenna element 100 excited on the reference ground plane 200 can be referred to the appendix. Figure 15 As shown by the dashed line. The reference ground 200 has a first ground current along the first edge 21 and a third ground current in a direction similar to the first ground current, a second ground current along the second edge 22 and a fourth ground current in a direction similar to the second ground current, and a fifth ground current located between the third ground current and the fourth ground current. However, the maximum angle of the current distribution on the reference ground 200 is approximately the angle between the first ground current and the second ground current, which is close to 90°. Therefore, there are almost no currents in opposite directions that cancel each other out on the reference ground 200, thereby improving the radiation efficiency of the antenna element 100 in the first resonant mode and the first intermediate mode, and improving the communication performance of the electronic device 1000 in the first frequency band and the fourth frequency band.

[0113] In another possible embodiment, such as Figure 17 As shown, the other end of the first grounding member 40 is located on the side of one end of the first grounding member 40 near the corner point 25 of the ground plane. Since the other end of the first grounding member 40 is the return point of the other part of the resonant current of the first resonant mode of the first inverted F-type antenna and the return point of the second resonant mode, placing the other end of the first grounding member 40 near the corner point 25 of the ground plane is beneficial for the first resonant mode of the antenna element 100 to excite the first ground current along the first edge 21 and the second ground current along the second edge 22 on the reference ground plane 200, and for the second resonant mode to excite the first ground current along the first edge 21 and the second ground current along the second edge 22 on the reference ground plane 200. This allows the first and second resonant modes of the antenna element 100 to take into account radiation in two orthogonal directions, improves the radiation omnidirectionality of the first and second resonant modes of the antenna element 100, makes the resonant current distribution of the first and second resonant modes of the antenna element 100 more uniform, can form multiple SAR hot spots, and can reduce the SAR value of the first resonant mode.

[0114] Furthermore, since the other part of the resonant current of the first intermediate mode, the part of the resonant current of the second intermediate mode, and the part of the resonant current of the third intermediate mode also return to ground through the other end of the first grounding member 40, the other end of the first grounding member 40 is located on the side of the grounding member 40 that is close to the corner point 25 of the grounding point 25. This is also beneficial for the first intermediate mode, the second intermediate mode, and the third intermediate mode of the antenna element 100 to excite the first ground current along the first edge 21 and the second ground current along the second edge 22 on the reference ground 200. As a result, the first intermediate mode, the second intermediate mode, and the third intermediate mode of the antenna element 100 can take into account the radiation in two orthogonal directions, improve the radiation omnidirectionality of the first intermediate mode, the second intermediate mode, and the third intermediate mode of the antenna element 100, make the resonant current distribution of the first intermediate mode, the second intermediate mode, and the third intermediate mode of the antenna element 100 more uniform, form multiple SAR hot spots, and reduce the SAR value of the first intermediate mode, the second intermediate mode, and the third intermediate mode.

[0115] Optional, such as Figure 17 As shown, the distance between the projection point of the other end of the first grounding member 40 on the reference floor 200 and the floor corner point 25 is less than or equal to 1 / 16 of the wavelength of the first frequency band. The distance between the projection point of the other end of the first grounding member 40 on the reference floor 200 and the floor corner point 25 can be referred to in the attached diagram. Figure 17 As shown in L8. For example, when the first frequency band is a mid-to-high frequency band, the distance between the projection point of the other end of the first grounding element 40 on the reference floor 200 and the floor corner point 25 can be less than or equal to 15mm.

[0116] When the distance between the projection point of the other end of the first grounding element 40 onto the reference ground plane 200 and the corner point 25 of the ground plane is less than or equal to 1 / 16 of the wavelength of the first frequency band, the distance between the other end of the first grounding element 40 and the corner point 25 of the ground plane is small. The current distribution excited on the reference ground plane 200 by the first resonant mode, second resonant mode, first intermediate mode, second intermediate mode, and third intermediate mode of the antenna element 100 can be referred to the appendix. Figure 15As shown by the dashed line. The reference ground 200 has a first ground current along the first edge 21 and a third ground current in a direction similar to the first ground current, a second ground current along the second edge 22 and a fourth ground current in a direction similar to the second ground current, and a fifth ground current located between the third ground current and the fourth ground current. However, the maximum angle of the current distribution on the reference ground 200 is approximately the angle between the first ground current and the second ground current, which is close to 90°. Therefore, there are almost no currents in opposite directions that cancel each other out on the reference ground 200, thereby improving the radiation efficiency of the antenna element 100 in the first resonant mode, the second resonant mode, the first intermediate mode, the second intermediate mode, and the third intermediate mode, and improving the communication performance of the electronic device 1000 in the first frequency band, the second frequency band, the fourth frequency band, the fifth frequency band, and the sixth frequency band.

[0117] In one possible embodiment, such as Figure 18 As shown, the length of the first edge 21 is greater than the length of the second edge 22. The first edge 21 can correspond to a sub-border along the length direction of the electronic device 1000, and the second edge 22 can correspond to a sub-border along the width direction of the electronic device 1000; alternatively, the first edge 21 can correspond to a sub-border along the width direction of the electronic device 1000, and the second edge 22 can correspond to a sub-border along the length direction of the electronic device 1000. In this embodiment, the longer first edge 21 corresponds to a sub-border 300 along the length direction of the electronic device 1000, and the shorter second edge 22 corresponds to a sub-border 300 along the width direction of the electronic device 1000. For example, the first edge 21 corresponds to the first sub-border 31, meaning the extension direction of the first edge 21 is the same as or approximately the same as the extension direction of the first sub-border 31; the second edge 22 corresponds to the second sub-border 32, meaning the extension direction of the second edge 22 is the same as or approximately the same as the extension direction of the second sub-border 32.

[0118] When the length of the first edge 21 is greater than the length of the second edge 22, the path of the first ground current excited by the antenna element 100 along the first edge 21 on the reference ground 200 is longer. As a result, the intensity of the first ground current excited by the antenna element 100 along the first edge 21 on the reference ground 200 can be stronger than the intensity of the second ground current along the second edge 22. In this case, when the first edge 21 is set along the long side of the electronic device 1000 such as a mobile phone, it is beneficial to improve the radiation efficiency of the electronic device 1000. When the first edge 21 is set along the short side of the electronic device 1000 such as a mobile phone, it is beneficial to improve the anti-grip performance of the electronic device 1000.

[0119] like Figure 19As shown, when the antenna radiator 10 includes a first radiating segment 101 and a second radiating segment 102 that are bent and connected, with the first radiating segment 101 located on the side of the first edge 21 away from the center of the reference ground 200 and the second radiating segment 102 located on the side of the second edge 22 away from the center of the reference ground 200, the projection point of the feed point 13 on the reference ground 200 and the projection point of the free end 11 on the reference ground 200 are both located on the first edge 21. In this embodiment, the feed point 13 is located in the first radiating segment 101. The feed source 20, the first tuning circuit 30, the first grounding element 40, and the second grounding element 60 can be located within the space enclosed by the first radiating segment 101 and the second radiating segment 102. In other words, the feed source 20, the first tuning circuit 30, the first grounding element 40, and the second grounding element 60 are all located inside the antenna radiator 10. The feed 20, the first tuning circuit 30, and the first grounding element 40 are all located inside the antenna radiator 10, which facilitates placing the antenna radiator 10 on the frame 300 or placing the antenna radiator 10 close to the frame 300, thereby reducing the radiation energy loss of the antenna element 100. The electrical connection point 14 can be located in the second radiating section 102 or in the first radiating section 101. The electrical connection point 14 being located in the second radiating section 102 facilitates the layout of the feed 20, the first tuning circuit 30, and the first grounding element 40.

[0120] Figure 19 The dashed line illustrates the resonant current distribution of the third resonant mode of antenna element 100. Since feed point 13 is located in the first radiating section 101, the resonant current of the third resonant mode of antenna element 100 in the antenna radiator 10 is concentrated in the first radiating section 101. Furthermore, feed point 13 is electrically connected to the first tuning circuit 30, so the return point of antenna element 100 in the third resonant mode is also located in the first radiating section 101, thus increasing the intensity of the first ground current excited along the first edge 21 on the reference ground plane 200 by the third resonant mode of antenna element 100. This allows the radiated energy of the third resonant mode of antenna element 100 to be concentrated in the length direction or width direction of electronic device 1000, which is beneficial for improving the radiation efficiency or anti-grip performance of antenna element 100 in the third resonant mode.

[0121] Furthermore, with the feed point 13 located in the first radiating section 101, the resonant currents of the second and third intermediate modes of the antenna element 100 in the antenna radiator 10 are also concentrated in the first radiating section 101. The return points of some of the resonant currents of the second and third intermediate modes of the antenna element 100 are also located in the first radiating section 101, and the intensity of the first ground current excited along the first edge 21 by the second and third intermediate modes of the antenna element 100 on the reference ground 200 is also enhanced. This allows the radiated energy of the second and third intermediate modes of the antenna element 100 to be concentrated in the length direction or width direction of the electronic device 1000, which is beneficial for improving the radiation efficiency or anti-grip performance of the antenna element 100 in the second and third intermediate modes.

[0122] Optionally, the distance between the projection point of the feed point 13 on the reference floor 200 and the floor corner point 25 is less than or equal to 1 / 16 of the wavelength of the first frequency band. The distance between the projection point of the feed point 13 on the reference floor 200 and the floor corner point 25 can be referred to the appendix. Figure 19 As shown in L9. For example, when the first frequency band is a mid-to-high frequency band, the distance between the projection point of the feed point 13 on the reference floor 200 and the corner point 25 of the floor can be less than or equal to 15mm.

[0123] When the distance between the projection point of the feed point 13 on the reference ground 200 and the corner point 25 of the ground is less than or equal to 1 / 16 of the wavelength of the first frequency band, the distance between the feed point 13 and the corner point 25 of the ground is relatively small. The current distribution excited by the antenna element 100 on the reference ground 200 in the third resonant mode, the second intermediate mode, and the third intermediate mode can be referred to the appendix. Figure 15 As shown by the dashed line. The reference ground 200 has a first ground current along the first edge 21 and a third ground current in a direction similar to the first ground current, a second ground current along the second edge 22 and a fourth ground current in a direction similar to the second ground current, and a fifth ground current located between the third ground current and the fourth ground current. However, the maximum angle of the current distribution on the reference ground 200 is approximately the angle between the first ground current and the second ground current, which is close to 90°. Therefore, there are almost no currents in opposite directions that cancel each other out on the reference ground 200, thereby improving the radiation efficiency of the antenna element 100 in the third resonant mode, the second intermediate mode, and the third intermediate mode, and improving the communication performance of the electronic device 1000 in the third frequency band and the fourth frequency band.

[0124] Furthermore, such as Figure 20As shown, the antenna unit 100 also includes a second tuning circuit 50. The second tuning circuit 50 may include capacitors and / or inductors, etc. This application does not specifically limit the number of capacitors or inductors included in the second tuning circuit 50. When the second tuning circuit 50 includes multiple capacitors, the multiple capacitors may be connected in series or in parallel. When the second tuning circuit 50 includes multiple inductors, the multiple inductors may be connected in series or in parallel. When the second tuning circuit 50 includes one or more capacitors and one or more inductors, the inductors and capacitors may be connected in series or in parallel.

[0125] The second tuning circuit 50 is electrically connected between the other end of the first grounding member 40 and the reference ground plane 200. The second tuning circuit 50 and the other end of the first grounding member 40 can be directly electrically connected, or indirectly connected via electrical connectors such as metal springs. The second tuning circuit 50 and the reference ground plane 200 can also be directly electrically connected, or indirectly connected via electrical connectors such as metal springs.

[0126] The second tuning circuit 50 is used to adjust the impedance of the antenna element 100 to achieve impedance matching of the antenna element 100 in the first resonant mode and the second resonant mode. Since the return point of part of the resonant current of the antenna element 100 in the first resonant mode is located at the other end of the first grounding member 40, and the return point of the antenna element 100 in the second resonant mode is also located at the other end of the first grounding member 40, further designing the second tuning circuit 50 between the other end of the first grounding member 40 and the reference ground 200 can better achieve impedance matching of the antenna element 100 in the first resonant mode and the second resonant mode.

[0127] The second tuning circuit 50 can also be electrically connected between the ground terminal 12 and the reference ground 200; or, the second tuning circuit 50 can also be electrically connected between the second grounding member 60 and the reference ground 200.

[0128] In one possible implementation, the impedance of the antenna unit 100 can be adjusted by the first tuning circuit 30 to achieve impedance matching of the antenna unit 100 in one or more of the first resonant mode, the second resonant mode, and the third resonant mode; the impedance of the antenna unit 100 can be adjusted by the second tuning circuit 50 to achieve impedance matching of the antenna unit 100 in one or more of the first resonant mode and the second resonant mode. This reduces the design difficulty of the first tuning circuit 30 and the second tuning circuit 50 and makes it easier to ensure the impedance matching performance of the antenna unit 100 in multiple modes.

[0129] In one possible embodiment, the reference floor 200, feed 20, first tuning circuit 30, first grounding element 40, and second grounding element 60 may be located within the accommodating space enclosed by the frame 300, and the antenna radiator 10 may be disposed on the frame 300. In another possible embodiment, the reference floor 200, feed 20, first tuning circuit 30, first grounding element 40, second grounding element 60, and antenna radiator 10 may all be located within the accommodating space enclosed by the frame 300.

[0130] The first and second frequency bands are located in the mid-to-high frequency bands, while the third frequency band is located in the ultra-high frequency band. For example... Figure 21 As shown, Figure 21 for Figure 18 The diagram shows the return loss and efficiency curves of the electronic device 1000. Figure 21 The curve f in the middle is the return loss curve of electronic device 1000. Figure 21 Point 1 on the curve f corresponds to the resonant frequency of the first resonant mode, which is the center frequency of the first frequency band. Figure 21 Point 2 on the curve f corresponds to the resonant frequency of the second resonant mode, which is the center frequency of the second frequency band. Figure 21 The three points on curve f correspond to the resonant frequency of the third resonant mode, i.e., the center frequency of the third frequency band. The first intermediate mode does not form a distinct resonant frequency, but is implicit between the resonant frequencies of the first and second resonant modes. The second intermediate mode also does not form a distinct resonant frequency, but is implicit between the resonant frequencies of the second and third resonant modes. The third intermediate mode does not form a distinct resonant frequency, but is implicit to the right of the resonant frequency of the third resonant mode. It should be noted that because the impedance change of the antenna element 100 provided in this application is relatively uniform, the first, second, and third intermediate modes will not form a distinct resonance, but are implicit between the first, second, and third resonant modes. However, the existence of these intermediate modes makes the overall impedance change within the frequency band of the entire first, second, and third resonant modes and between them uniform, thus expanding the impedance bandwidth and forming a wide wave. Figure 21 The curve g represents the free efficiency curve of electronic device 1000. Figure 21 The curve h represents the radiation efficiency curve of electronic device 1000. Combined with... Figure 21 Curves f, g, and h show that the first, second, fourth, and fifth frequency bands basically cover the entire mid-to-high frequency band; the third and sixth frequency bands cover the 3.7 GHz ultra-high frequency band. The first, second, third, fourth, fifth, and sixth frequency bands achieve a continuous ultra-wide bandwidth.

[0131] like Figure 22 As shown, Figure 22 for Figure 19 The diagram shows the return loss and efficiency curves of the electronic device 1000. Figure 22 Point 1 on the middle curve j corresponds to the resonant frequency of the first resonant mode, which is the center frequency of the first frequency band. Figure 22 Point 2 on the middle curve j corresponds to the resonant frequency of the second resonant mode, which is the center frequency of the second frequency band. Figure 22 The three points on curve j correspond to the resonant frequency of the third resonant mode, i.e., the center frequency of the third frequency band. The first intermediate mode does not form a distinct resonant frequency; it is implicit between the resonant frequencies of the first and second resonant modes. The second intermediate mode does not form a distinct resonant frequency; it is implicit between the resonant frequencies of the second and third resonant modes. The third intermediate mode does not form a distinct resonant frequency; it is implicit to the right of the resonant frequency of the third resonant mode. Figure 22 The curve k in the middle represents the free efficiency curve of electronic device 1000. Figure 22 The curve m represents the radiation efficiency curve of electronic device 1000. Combined with... Figure 22 Curves j, k, and m show that the first, second, fourth, and fifth frequency bands basically cover the entire mid-to-high frequency band; the third and sixth frequency bands cover the 3.7 GHz ultra-high frequency band. The first, second, third, fourth, fifth, and sixth frequency bands achieve a continuous ultra-wide bandwidth. Compared with the above embodiments, the antenna radiator 10 of the antenna element 100 in this embodiment adopts a corner design, that is, the antenna radiator 10 includes a first radiating segment 101 and a second radiating segment 102 that are bent and connected, which excites some transverse modes, so the free efficiency in the third frequency band (N78) is slightly reduced.

[0132] like Figure 23 As shown, Figure 23 for Figure 19 The SAR value test diagram of the electronic device 1000 is shown. Figure 23 Test results show that when the electronic device 1000 operates at 1.75 GHz, the top SAR value of the electronic device 1000 is approximately 0.53 W / kg, which is significantly lower than the top SAR value of 1.2 W / kg of the electronic device 1000 in related technologies; when the electronic device 1000 operates at 1.95 GHz, the top SAR value of the electronic device 1000 is approximately 0.39 W / kg, which is also significantly lower than the top SAR value of 1.2 W / kg of the electronic device 1000 in related technologies.

[0133] like Figure 24As shown, the antenna element 100 also includes a parasitic stub 16. One end of the parasitic stub 16 forms a coupling gap with the free end 11, and the other end of the parasitic stub 16 is electrically connected to the reference ground plane 200. Under the excitation of the feed 20, the parasitic stub 16 generates a fourth resonant mode supporting the seventh frequency band. The size of the coupling gap between the parasitic stub 16 and the free end 11 can be 0.5mm to 2mm. The parasitic stub 16 and the reference ground plane 200 can be directly electrically connected, or indirectly electrically connected through electrical connectors such as metal springs. This application does not specifically limit the material or length of the parasitic stub 16. For example, the material of the parasitic stub 16 can be metal, alloy, etc. The length of the parasitic stub 16 only needs to be sufficient to support the seventh frequency band under the excitation of the feed 20. For example, the seventh frequency band can be the 5G mobile hotspot (Wi-Fi) band or the 5G Bluetooth (BitTorrent, BT) band. By setting parasitic stubs 16, antenna element 100 can support more frequency bands.

[0134] The features mentioned above in the specification, claims, and drawings can be arbitrarily combined with each other, provided they are meaningful within the scope of this application. Although embodiments of this application have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting this application. Those skilled in the art can make changes, modifications, substitutions, and variations to the above embodiments within the scope of this application, and such improvements and refinements are also considered to be within the protection scope of this application.

Claims

1. An electronic device, characterized in that, include: Reference flooring; and An antenna unit includes an antenna radiator, a feed source, a first tuning circuit, and a first grounding element. One end of the antenna radiator forms a free end, and the other end forms a grounding end. The grounding end is electrically connected to a reference ground plane. A feed point and an electrical connection point are provided between the free end and the grounding end, on the side of the feed point away from the free end. The feed point is electrically connected to the feed source through the first tuning circuit. The first grounding element is a grounding wire. One end of the first grounding element is electrically connected to the electrical connection point, and the other end of the first grounding element extends toward the side where the grounding end is located. The other end of the first grounding element is electrically connected to the reference ground plane. Wherein, the first grounding element, the antenna radiator between the grounding end and the free end generates a first resonant mode supporting a first frequency band under the excitation of the feed source; the first grounding element, the antenna radiator between the electrical connection point and the free end generates a second resonant mode supporting a second frequency band under the excitation of the feed source; the antenna radiator between the feed point and the free end generates a third resonant mode supporting a third frequency band under the excitation of the feed source.

2. The electronic device according to claim 1, characterized in that, The first frequency band is lower than the second frequency band, the second frequency band is lower than the third frequency band, and the first resonant mode includes the 1 / 4 wavelength mode generated by the antenna radiator between the first grounding element, the electrical connection point and the free end, and the 1 / 4 wavelength mode generated by the antenna radiator between the grounding end and the free end; the second resonant mode is the 1 / 4 wavelength mode. The third resonant mode is a 1 / 4 wavelength mode.

3. The electronic device according to claim 2, characterized in that, Under the excitation of the feed source, the first grounding element and the antenna radiator between the grounding end and the free end also generate a first intermediate mode supporting a fourth frequency band, the fourth frequency band being located between the first frequency band and the second frequency band. The first intermediate mode includes a first resonant current generated by the first grounding element and the antenna radiator between the electrical connection point and the free end, and a second resonant current generated by the antenna radiator between the grounding end and the electrical connection point, the intensity of the second resonant current being weaker than the intensity of the first resonant current.

4. The electronic device according to claim 2, characterized in that, The antenna radiator between the first grounding element, the electrical connection point, and the free end, under the excitation of the feed source, also generates a second intermediate mode supporting a fifth frequency band, the fifth frequency band being located between the second frequency band and the third frequency band. The second intermediate mode includes a third resonant current generated by the antenna radiator between the feed point and the free end, and a fourth resonant current generated by the antenna radiator between the first grounding element, the electrical connection point, and the feed point. The direction of the fourth resonant current is the same as that of the third resonant current, and the intensity of the fourth resonant current is weaker than that of the third resonant current.

5. The electronic device according to claim 2, characterized in that, The antenna radiator between the first grounding element, the electrical connection point, and the free end, under the excitation of the feed source, also generates a third intermediate mode supporting a sixth frequency band, the sixth frequency band being higher than the third frequency band. The third intermediate mode includes a fifth resonant current generated by the antenna radiator between the feed point and the free end, and a sixth resonant current generated by the antenna radiator between the first grounding element, the electrical connection point, and the feed point. The direction of the sixth resonant current is opposite to that of the fifth resonant current, and the intensity of the sixth resonant current is weaker than that of the fifth resonant current.

6. The electronic device according to any one of claims 1 to 5, characterized in that, The difference between the impedance value of the antenna radiator between the grounding terminal and the electrical connection point and the impedance value of the first grounding component is less than or equal to a preset difference.

7. The electronic device according to any one of claims 1 to 5, characterized in that, The antenna unit further includes a second grounding component, which is electrically connected between the grounding terminal and the reference ground. The sum of the impedance value of the second grounding component and the impedance value of the antenna radiator between the grounding terminal and the electrical connection point is the target impedance value. The difference between the target impedance value and the impedance value of the first grounding component is less than or equal to a preset difference. The first grounding component, the second grounding component, and the antenna radiator between the grounding terminal and the free end generate the first resonant mode under the excitation of the feed source.

8. The electronic device according to claim 7, characterized in that, The second grounding component is a grounding wire, and the length of the second grounding component is less than the length of the first grounding component.

9. The electronic device according to any one of claims 1 to 5, characterized in that, The sum of the length of the first grounding element and the length of the antenna radiator between the electrical connection point and the feed point is greater than or equal to 1 / 16 of the wavelength of the first frequency band, and less than or equal to 3 / 16 of the wavelength of the first frequency band.

10. The electronic device according to any one of claims 1 to 5, characterized in that, The reference floor includes a first edge and a second edge that are bent and connected, and the connection between the first edge and the second edge forms a floor corner point. The antenna radiator is located on the side of the first edge away from the center of the reference floor; or, the antenna radiator includes a first radiating segment and a second radiating segment that are bent and connected, the first radiating segment is located on the side of the first edge away from the center of the reference floor, and the second radiating segment is located on the side of the second edge away from the center of the reference floor.

11. The electronic device according to claim 10, characterized in that, The antenna element excites a first ground current along the first edge and a second ground current along the second edge on the reference ground, wherein the intensity of the first ground current is stronger than the intensity of the second ground current.

12. The electronic device according to claim 10, characterized in that, The grounding terminal is located on the side of the free end near the corner of the floor, and / or, the other end of the first grounding member is located on the side of one end of the grounding member near the corner of the floor.

13. The electronic device according to claim 12, characterized in that, The distance between the projection point of the grounding terminal on the reference floor and the corner point of the floor is less than or equal to 1 / 16 of the wavelength of the first frequency band, and / or the distance between the other end of the first grounding member on the projection point of the reference floor and the corner point of the floor is less than or equal to 1 / 16 of the wavelength of the first frequency band.

14. The electronic device according to claim 10, characterized in that, The length of the first edge is greater than the length of the second edge, and the projection points of the feed point on the reference floor and the projection points of the free end on the reference floor are both located on the first edge.

15. The electronic device according to claim 14, characterized in that, The distance between the projection point of the feed point on the reference floor and the corner point of the floor is less than or equal to 1 / 16 of the wavelength of the first frequency band.

16. The electronic device according to any one of claims 1 to 5, characterized in that, The first frequency band and the second frequency band are located in the mid-to-high frequency band, and the third frequency band is located in the ultra-high frequency band.

17. The electronic device according to any one of claims 1 to 5, characterized in that, The antenna unit further includes a second tuning circuit, which is electrically connected between the other end of the first grounding member and the reference ground. The second tuning circuit is used to adjust the impedance of the antenna unit to achieve impedance matching of the antenna unit in the first resonant mode and the second resonant mode.

18. The electronic device according to any one of claims 1 to 5, characterized in that, The antenna element also includes a parasitic stub, one end of which forms a coupling gap with the free end, and the other end of which is electrically connected to the reference ground. The parasitic stub generates a fourth resonant mode supporting the seventh frequency band under the excitation of the feed source.

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