Electronic device

Abstract

The invention provides electronic equipment. The electronic equipment comprises a reference floor and an antenna unit, the antenna unit comprises an antenna radiator, a feed source, a first tuning circuit and a first grounding piece, one end of the antenna radiator forms a free end, the other end of the antenna radiator forms a grounding end, the grounding end is electrically connected with the reference floor, a feeding point and an electric connection point are arranged between the free end and the grounding end, and the electric connection point is arranged on the side, away from the free end, of the feeding point; the feeding point is electrically connected with the feed source through the first tuning circuit, one end of the first grounding piece is electrically connected with the electric connection point, and the other end of the first grounding piece is electrically connected with the reference floor; wherein the antenna unit 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 under excitation of the feed source. The electronic equipment provided by the invention can realize multiple frequency bands and is flexible in structural design.

Description

Technical Field

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

[0002] In the related art, the multi-band and wide-band performance of the antenna is achieved by adding parasitic radiation branches. This technical solution has many requirements on the structural design of the antenna. Summary of the invention

[0003] The present application provides an electronic device capable of achieving multiple frequency bands and having a flexible structural design.

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

[0005] reference floor; and

[0006] An antenna unit, comprising an antenna radiator, a feed source, a first tuning circuit and a first grounding member, wherein one end of the antenna radiator forms a free end, the other end of the antenna radiator forms a grounding end, the grounding end is electrically connected to the reference ground, a feeding point and an electrical connection point arranged on a side of the feeding point away from the free end are provided between the free end and the grounding end, the feeding point is electrically connected to the feed source through the first tuning circuit, one end of the first grounding member is electrically connected to the electrical connection point, and the other end of the first grounding member is electrically connected to the reference ground;

[0007] Among them, the first grounding member, the antenna radiator between the ground end and the free end generates a first resonance mode supporting the first frequency band under the excitation of the feed source; the first grounding member, the antenna radiator between the electrical connection point and the free end generates a second resonance mode supporting the second frequency band under the excitation of the feed source; the antenna radiator between the feeding point and the free end generates a third resonance mode supporting the third frequency band under the excitation of the feed source.

[0008] The electronic device provided in the present application includes a reference floor and an antenna unit, wherein the antenna unit includes an antenna radiator, a feed source, a first tuning circuit and a first grounding member, wherein one end of the antenna radiator is formed into a free end, the other end of the antenna radiator is formed into a grounding member, and a feeding point and an electrical connection point located on a side of the feeding point away from the free end are designed between the grounding member and the free end, so that the feeding point is electrically connected to the feed source through the first tuning circuit, one end of the first grounding member is electrically connected to the electrical connection point, and the other end of the first grounding member is electrically connected to the reference floor, thereby forming an antenna radiator between the feed source, the first tuning circuit, the grounding member and the free end. An inverted F-type antenna can make the feed source, the first tuning circuit, the first grounding piece, and the antenna radiator between the electrical connection point and the free end form another inverted F-type antenna, so that the first grounding piece, the antenna radiator between the grounding end and the free end generate a first resonance mode under the excitation of the feed source; the first grounding piece, the antenna radiator between the electrical connection point and the free end generate a second resonance mode under the excitation of the feed source; when the antenna radiator between the feed point and the free end generates a third resonance mode under the excitation of the feed source, the antenna unit supports the first frequency band, the second frequency band and the third frequency band, which can broaden the communication frequency band of the electronic device. Since no parasitic radiation branches are added, but different types of antenna units are formed and multiple resonance modes are generated by adding the first grounding piece, the structural design of the antenna unit is simpler, more flexible, and more conducive to miniaturization. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments are briefly introduced below.

[0010] Figure 1 A schematic diagram of the structure of an electronic device provided in an embodiment of the present 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 A schematic diagram showing a structure in which the first grounding member of the antenna unit is replaced by a grounding circuit having components such as an inductor and / or a capacitor;

[0013] Figure 4 for Figure 2 A schematic diagram of the resonant current distribution of the first resonant mode of the antenna unit shown;

[0014] Figure 5 for Figure 2 A schematic diagram of the resonant current distribution of the second resonant mode of the antenna unit shown;

[0015] Figure 6 for Figure 2A schematic diagram of the resonant current distribution of the third resonant mode of the antenna unit shown;

[0016] Figure 7 for Figure 2 A schematic diagram of the antenna unit shown is labeled with length parameters;

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

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

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

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

[0021] Fig.12 for Fig.11 A schematic diagram of a structure in which the sum of the length of the first grounding member of the antenna unit and the length of the antenna radiator between the electrical connection point and the feeding 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] Fig.13 for Fig.11 The reference floor of the antenna unit shown includes a first edge and a second edge, and the antenna radiator is located on one side of the first edge;

[0023] Fig.14 for Fig.11 A schematic diagram of a structure in which a reference floor of the antenna unit shown comprises a first edge and a second edge, a first radiating section of the antenna radiator is located on one side of the first edge, and a second radiating section is located on one side of the second edge;

[0024] Fig.15 for Fig.13 A structural schematic diagram of a distribution diagram of a floor current excited by the antenna unit on a reference floor;

[0025] Fig.16 for Fig.10 A schematic diagram of the structure in which the ground terminal of the antenna unit is located on the side of the free end close to the corner point of the floor;

[0026] Fig.17 for Fig.10A schematic structural diagram showing that the other end of the first grounding member of the antenna unit is located on one side of one end of the first grounding member close to a corner point of the floor;

[0027] Fig.18 for Fig.13 A schematic structural diagram of the electronic device shown in which the length of the first edge of the reference floor is greater than the length of the second edge;

[0028] Fig.19 for Fig.14 A schematic diagram of a structure in which the projection point of the feed point of the antenna unit on the reference floor and the projection point of the free end on the reference floor are both located at the first edge;

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

[0030] Fig.21 for Fig.18 Return loss and efficiency graphs of electronic devices shown;

[0031] Fig. 22 for Fig.19 Return loss and efficiency graphs of electronic devices shown;

[0032] Fig.23 for Fig.19 SAR value test chart of the electronic equipment shown;

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

[0034] Description of reference numerals:

[0035] Electronic device 1000; reference floor 200; antenna unit 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 piece 40; free end 11; grounding end 12; feeding point 13; electrical connection point 14; second grounding piece 60; first radiation section 101; second radiation section 102; first edge 21; second edge 22; third edge 23; floor corner point 25; fourth edge 24; second tuning circuit 50; parasitic branch 16. DETAILED DESCRIPTION

[0036] The technical solution provided by the present application will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the embodiments described in the present application are only a part of the embodiments, not all of the embodiments. Based on the embodiments described in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present application.

[0037] References to "embodiments" and "implementations" in this application mean that the specific features, structures, or characteristics described in conjunction with the embodiments or implementations may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it mutually exclusive, independent, or alternative to other embodiments. It can be explicitly and implicitly understood by those skilled in the art that the embodiments described in this application can be combined with other embodiments.

[0038] The terms "first", "second", etc. in the specification and claims of this application and the above-mentioned drawings are used to distinguish different objects rather than to describe a specific order; the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions.

[0039] like Figure 1 As shown, Figure 1 The schematic diagram of the structure of an electronic device 1000 provided in an embodiment of the present application. The electronic device 1000 may be a mobile phone, a tablet, a notebook, a watch, a drone, a robot, or other device with a wireless communication function. The present application embodiment takes a mobile phone as an example. The electronic device 1000 includes a reference floor 200 and an antenna unit 100.

[0040] The reference floor 200 refers to a portion of the electronic device 1000 that is not affected by any grounding configuration and is considered to be a conductive earth. The potential of the reference floor 200 is agreed to be zero. For example, the reference floor 200 may include a grounding layer of a main circuit board, a grounding layer of a secondary circuit board, a metal part of a middle frame, and a conductive part electrically connected to one or more of the grounding layer of the main circuit board, the grounding layer of the secondary circuit board, and the metal part of the middle frame in the electronic device 1000.

[0041] The middle frame includes a frame 300. The frame 300 is arranged to form an accommodating space. In a possible embodiment, the frame 300 may include a first sub-frame 31, a second sub-frame 32, a third sub-frame 33 and a fourth sub-frame 34 connected end to end. The first sub-frame 31 is arranged opposite to the third sub-frame 33. The second sub-frame 32 is arranged opposite to the fourth sub-frame 34. In the embodiment of the present application, the relative direction of the first sub-frame 31 and the third sub-frame 33 is defined as the width direction of the electronic device 1000, which can be referred to in the attached figure. Figure 1The relative direction of the second sub-frame 32 and the fourth sub-frame 34 is defined as the length direction of the electronic device 1000, which can be referred to in the attached Figure 1 The length of the first sub-frame 31 may be equal to the length of the third sub-frame 33, the length of the second sub-frame 32 may be equal to the length of the fourth sub-frame 34, and the length of the first sub-frame 31 and the length of the third sub-frame 33 may be greater than the length of the second sub-frame 32 and the length of the fourth sub-frame 34.

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

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

[0044] The antenna radiator 10 can be a frame antenna radiator or a built-in antenna radiator. In other words, the antenna radiator 10 can be located on the frame 300 or in the accommodation 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 grounding end 12. "Free end" can be understood as an end that is not electrically connected to a conductive part or has a break between the conductive part. The grounding end 12 is electrically connected to the reference floor 200. The grounding end 12 and the reference floor 200 can be directly electrically connected or indirectly electrically connected. In the following embodiments, the technical solution provided by the present application is described in detail by taking the direct electrical connection of the grounding end 12 and the reference floor 200; and the indirect electrical connection of the grounding end 12 and the reference floor 200 through the second grounding member 60 as examples.

[0045] A feeding point 13 and an electrical connection point 14 disposed on a side of the feeding point 13 away from the free end 11 are disposed between the ground terminal 12 and the free end 11. The feeding point 13 can be understood as a specific position between the ground terminal 12 and the free end 11. The electrical connection point 14 can be understood as a specific position between the ground terminal 12 and the free end 11 and different from the feeding point 13. It can be understood that the feeding point 13 does not coincide with the free end 11 and the ground terminal 12, that is, the feeding point 13 is not disposed at the free end 11, and the feeding point 13 is not disposed at the ground terminal 12. The electrical connection point 14 does not coincide with the free end 11 and the ground terminal 12, that is, the electrical connection point 14 is not disposed at the free end 11, and the electrical connection point 14 is not disposed at the ground terminal 12. The feeding point 13 and the electrical connection point 14 are spaced apart. It can be understood that the free end 11, the feeding point 13, the electrical connection point 14 and the ground terminal 12 are arranged in sequence.

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

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

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

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

[0050] It can be understood that the feed source 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 member 40 form a first inverted F-type antenna. The feed source 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 member 40, the grounding end 12 and the free end 11 generates a first resonance mode supporting the first frequency band under the excitation of the feed source 20. The antenna radiator 10 between the first grounding member 40, the electrical connection point 14 and the free end 11 generates a second resonance mode supporting the second frequency band under the excitation of the feed source 20. The antenna radiator 10 between the feed point 13 and the free end 11 generates a third resonance 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 member 40, the grounding end 12 and the free end 11 under the excitation of the feed source 20 is as follows Figure 4The first resonant mode includes the resonant current from the first grounding member 40 to the free end 11 through the electrical connection point 14, and includes the resonant current from the grounding terminal 12 to the free end 11. When the first grounding member 40 is a grounding circuit having components such as an inductor and / or a capacitor, the design of the grounding circuit needs to ensure that part of the resonant current of the first resonant mode can return to the ground through the electrical connection point 14 and the grounding circuit, and the other part of the resonant current can return to the ground through the grounding terminal 12.

[0053] like Figure 5 As shown, the second resonance mode generated by the antenna radiator 10 between the first grounding member 40, the electrical connection point 14 and the free end 11 under the excitation of the feed source 20 is as shown in FIG. Figure 5 The second resonance mode includes the resonance current from the first grounding member 40 through the electrical connection point 14 to the free end 11. When the first grounding member 40 is a grounding circuit having components such as an inductor and / or a capacitor, the design of the grounding circuit must ensure that the resonance current of the second resonance mode is completely returned to the ground through the electrical connection point 14 and the grounding circuit.

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

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

[0056] The electronic device 1000 provided in the present application includes a reference floor 200 and an antenna unit 100, wherein the antenna unit 100 includes an antenna radiator 10, a feed source 20, a first tuning circuit 30 and a first grounding member 40. By forming a free end 11 at one end of the antenna radiator 10, forming a grounding terminal 12 at the other end of the antenna radiator 10, and designing a feeding point 13 between the grounding terminal 12 and the free end 11 and designing an electrical connection point 14 located on the side of the feeding point 13 away from the free end 11, the feeding point 13 is electrically connected to the feed source 20 through the first tuning circuit 30, one end of the first grounding member 40 is electrically connected to the electrical connection point 14, and the other end of the first grounding member 40 is electrically connected to the reference floor 200, so that the feed source 20, the first tuning circuit 30, the grounding terminal 12 and the free end 11 can be connected. The antenna radiator 10 forms an inverted F-type antenna, which can make the feed source 20, the first tuning circuit 30, the first grounding member 40, and the antenna radiator 10 between the electrical connection point 14 and the free end 11 form another inverted F-type antenna. In this way, the antenna radiator 10 between the first grounding member 40, the grounding end 12 and the free end 11 generates a first resonance mode under the excitation of the feed source 20; the antenna radiator 10 between the first grounding member 40, the electrical connection point 14 and the free end 11 generates a second resonance mode under the excitation of the feed source 20; when the antenna radiator 10 between the feed point 13 and the free end 11 generates a third resonance mode under the excitation of the feed source 20, the antenna unit 100 supports the first frequency band, the second frequency band and the third frequency band, and the communication frequency band of the electronic device 1000 can be broadened. Since no parasitic radiation branches are added, but different types of antenna units 100 are formed by adding the first grounding member 40 and generating multiple resonance modes, the structural design of the antenna unit 100 is simpler and more flexible, and is more conducive to miniaturization.

[0057] Among them, 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 resonance mode includes the 1 / 4 wavelength mode generated by the first grounding member 40, the antenna radiator 10 between the electrical connection point 14 and the free end 11, and the 1 / 4 wavelength mode generated by the antenna radiator 10 between the grounding end 12 and the free end 11. The second resonance mode is the 1 / 4 wavelength mode. The third resonance mode is the 1 / 4 wavelength mode.

[0058] It can be understood that 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 1 / 4 wavelength of the second frequency band. Figure 7 The length of the antenna radiator 10 between the electrical connection point 14 and the free end 11 can be referred to in the attached Figure 7L2 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-type antenna. For example, when the second frequency band is a medium-high frequency band (1 GHz to 3 GHz), the overall length of the first inverted F-type antenna can be 30 mm to 60 mm.

[0059] The length of the antenna radiator 10 between the ground 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. Figure 7 L3 shown. It can be understood that the length of the antenna radiator 10 between the ground end 12 and the free end 11 is the overall length of the antenna radiator 10, which is also described as the overall length of the second inverted F-type antenna in the following embodiments. For example; when the target frequency band is a medium-high frequency band, the overall length of the second inverted F-type 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-type antenna can be longer than the overall length of the first inverted F-type antenna. It can be understood that the first resonant mode is a hybrid mode formed by the 1 / 4 wavelength mode of the first inverted F-type antenna and the 1 / 4 wavelength mode of the second inverted F-type antenna.

[0060] The length of the antenna radiator 10 between the feeding point 13 and the free end 11 is 1 / 4 wavelength of the third frequency band. Figure 7 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 feeding point 13 and the free end 11 may be 10 mm to 30 mm.

[0061] Since the feed source 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 member 40 form a first inverted F-type antenna, the first grounding member 40, the antenna radiator 10 between the electrical connection point 14 and the free end 11 can more easily generate a second resonant mode supporting 1 / 4 wavelength of the second frequency band under the excitation of the feed source 20, and 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 can more easily generate a third resonant mode supporting 1 / 4 wavelength of the third frequency band under the excitation of the feed source 20, and the third resonant mode is another fundamental mode of the first inverted F-type antenna. In addition, since the electrical connection point 14 is arranged on the side of the feeding point 13 away from the free end 11, the sum of the length of the first grounding piece 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 feeding 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 source 20, the first tuning circuit 30, the antenna radiator 10 between the ground end 12 and the free end 11 forms a second inverted F-type antenna, the antenna radiator 10 between the ground end 12 and the free end 11 is also easy to generate a 1 / 4 wavelength mode supporting the target frequency band under the excitation of the feed source 20; and since the length of the antenna radiator 10 between the ground end 12 and the free end 11 is longer than the length of the antenna radiator 10 between the feeding point 13 and the free end 11, the target frequency band is lower than the third frequency band supported by the third resonant mode, which is easier to achieve and 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, since the first resonant mode is a mixed mode formed by a 1 / 4 wavelength mode supporting the second frequency band formed by the first inverted F-type antenna and a 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, the target frequency band is lower than the second frequency band, thereby making the first frequency band lower than the second frequency band, which is more conducive to the first frequency band, the second frequency band and the third frequency band to form a wide band.

[0064] In summary, by making the first resonant mode generated by the antenna radiator 10 between the first grounding member 40, the grounding end 12 and the free end 11 under the excitation of the feed source 20 support a relatively low first frequency band; making the second resonant mode generated by the antenna radiator 10 between the first grounding member 40, the electrical connection point 14 and the free end 11 under the excitation of the feed source 20 support a relatively high second frequency band; and making the third resonant mode generated by the antenna radiator 10 between the feeding point 13 and the free end 11 under the excitation of the feed source 20 support a higher third frequency band, the design difficulty of the first tuning circuit 30 is reduced. In addition, by making the first resonance mode generated by the antenna radiator 10 between the first grounding member 40, the grounding end 12 and the free end 11 under the excitation of the feed source 20 support a relatively low first frequency band; making the second resonance mode generated by the antenna radiator 10 between the first grounding member 40, the grounding end 12 and the free end 11 under the excitation of the feed source 20 support a relatively high second frequency band; making the third resonance mode generated by the antenna radiator 10 between the feeding point 13 and the 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 unit 100 can be made larger, which is more conducive to the first frequency band, the second frequency band and the third frequency band forming a wide band. Of course, in other possible embodiments, the second frequency band can also be lower than the target frequency band, so that the second frequency band can also be lower than the first frequency band.

[0065] Furthermore, if Figure 8 As shown, the first grounding member 40 and the antenna radiator 10 between the grounding end 12 and the free end 11 also generate a first intermediate mode supporting a fourth frequency band under the excitation of the feed source 20. The fourth frequency band is between the first frequency band and the second frequency band.

[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), and the first frequency band is lower than the fourth frequency band, and the fourth frequency band is lower than the second frequency band; or, the first frequency band, the fourth frequency band and the second frequency band can all be medium-high frequency bands, and the first frequency band is lower than the fourth frequency band, and the fourth frequency band is 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 medium-high frequency bands, and the fourth frequency band is lower than the second frequency band; or, the first frequency band and the fourth frequency band can be medium-high frequency bands, and the first frequency band is lower than the fourth frequency band, and the second frequency band can be a high frequency band, etc.

[0067] By making the first grounding member 40, the antenna radiator 10 between the grounding end 12 and the free end 11 also generate the 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, so that a continuous broadband can be formed between the first frequency band, the fourth frequency band and the second frequency band, thereby avoiding the occurrence of a frequency band between the first frequency band and the second frequency band that cannot be covered or can be covered but with a 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 middle dotted line illustrates the resonant current distribution of the first intermediate mode. The first intermediate mode includes the first grounding member 40, the first resonant current generated by the antenna radiator 10 between the electrical connection point 14 and the free end 11, and the second resonant current generated by the antenna radiator 10 between the ground terminal 12 and the electrical connection point 14. Among them, the current intensity of the second resonant current is weaker than the current intensity of the first resonant current. It can be understood that the first resonant current of the first intermediate mode is the partial resonant current on the antenna radiator 10 between the electrical connection point 14 and the free end 11 in the 1 / 4 wavelength mode generated by the antenna radiator 10 between the ground terminal 12 and the free end 11, and the partial resonant current of the second resonant mode is superimposed to form a resonant current. The second resonant current of the first intermediate mode is the partial resonant current on the antenna radiator 10 between the ground terminal 12 and the electrical connection point 14 in the 1 / 4 wavelength mode generated by the antenna radiator 10 between the ground terminal 12 and the free end 11. In short, the first intermediate mode can be understood as a mixed mode formed by the 1 / 4 wavelength mode generated by the antenna radiator 10 between the ground end 12 and the free end 11 and the second resonant mode; that is, the first intermediate mode is also a mixed mode formed by the 1 / 4 wavelength mode of the first inverted F-type antenna and the 1 / 4 wavelength mode of the second inverted F-type antenna. The difference between the first intermediate mode and the first resonant mode is that: the resonant current generated by the first inverted F-type antenna in the first intermediate mode is stronger than the resonant current generated by the first inverted F-type antenna in the first resonant mode, and / or, the resonant current generated by the second inverted F-type antenna in the first intermediate mode is weaker than the resonant current generated by the second inverted F-type antenna in the first resonant mode.

[0069] Obviously, since the path length of the resonant current of the first intermediate mode is the same as the path length of the resonant current of the first resonant mode, it is easier to achieve and reduce the design difficulty of the first tuning unit to make the fourth frequency band between the first frequency band and the second frequency band than to make the fourth frequency band between the second frequency band and the third frequency band.

[0070] In a possible embodiment, the first frequency band and the second frequency band are located in the medium and high frequency band. The third frequency band is located in the ultra-high frequency band. The fourth frequency band is located between the first frequency band and the second frequency band. By making the first frequency band and the second frequency band located in the medium and high frequency band, the fourth frequency band located between the first frequency band and the second frequency band, and the third frequency band located in the ultra-high frequency band, it is possible to achieve that the frequency band supported by the antenna unit 100 covers more medium and high frequency bands, and achieve the support of the antenna unit 100 for the ultra-high frequency band. Among them, the first frequency band, the second frequency band and the fourth frequency band can form a wide band. In a possible implementation, 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 frequency band, the second frequency band and the fourth frequency band can form a wide band of 0.5GHz to 1.5GHz. In other words, the bandwidth of the S11 parameter of the antenna unit 100 less than -2dB can reach 0.5GHz to 2GHz.

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

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

[0073] By making the antenna radiator 10 between the first grounding member 40, the electrical connection point 14 and the free end 11 also 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 frequency band and the third frequency band, so that a continuous broadband can be formed between the second frequency band, the fifth frequency band and the third frequency band, thereby avoiding the occurrence of a frequency band between the second frequency band and the third frequency band that cannot be covered or can be covered but with a poor signal when the bandwidth of the second frequency band and / or the bandwidth of the third frequency band is narrow, that is, avoiding discontinuity between the second frequency band and the third frequency band.

[0074] like Fig. 9 As shown, Fig. 9The middle 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 and the electrical connection point 14 and the feed point 13. The flow 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 a partial resonant current on the antenna radiator 10 between the feeding point 13 and the free end 11 in the second resonant mode, and a resonant current formed by superimposing the partial resonant current of the third resonant mode. The fourth resonant current of the second intermediate mode is a partial resonant current on the antenna radiator 10 between the first grounding member 40 and the electrical connection point 14 and the feeding 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 of the second intermediate mode is the same as the path length of the resonant current of the second resonant mode, and the second intermediate mode is a mixed mode formed by the second resonant mode and the third resonant mode, it is easier to make the fifth frequency band between the second frequency band and the third frequency band and it is easier to reduce the design difficulty of the first tuning unit.

[0077] In a possible embodiment, the second frequency band is located in the medium and high frequency band. The third frequency band is located in the ultra-high frequency band. The fifth frequency band is located between the second frequency band and the third frequency band. Among them, the fifth frequency band can be partially located in the medium and high frequency band, and the other part is located in the ultra-high frequency band. By making the second frequency band located in the medium and high frequency band, the third frequency band located in the ultra-high frequency band, and the fifth frequency band located between the second frequency band and the third frequency band, it is possible to achieve a continuous broadband between the medium and high frequency band and the ultra-high frequency band supported by the antenna unit 100. In a possible implementation, 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, and the second frequency band, the third frequency band and the fifth frequency band can form a broadband of 0.7GHz to 2GHz. In other words, the bandwidth of the S11 parameter of the antenna unit 100 less than -2dB can reach 0.7GHz to 2GHz.

[0078] Furthermore, if Fig.10 As shown, the antenna radiator 10 between the first grounding member 40, the electrical connection point 14 and the free end 11 also generates 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.

[0079] For example: the third frequency band and the sixth frequency band can both be low frequency bands, and the sixth frequency band is higher than the third frequency band; or, the third frequency band and the sixth frequency band can both be medium and high frequency bands, and the sixth frequency band is higher than the third frequency band; or, the third frequency band and the sixth frequency band can both be overclocked frequency bands, and the sixth frequency band is higher than the third frequency band; or, the third frequency band can be a medium and high frequency band, and the sixth frequency band can be a high frequency band, etc.

[0080] By making the antenna radiator 10 between the first grounding piece 40, the electrical connection point 14 and the free end 11 also 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, so that the third frequency band and the sixth frequency band can form a broadband, 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 broadening the bandwidth of the antenna unit 100.

[0081] like Fig.10 As shown, Fig.10 The middle dashed line illustrates the resonant current distribution of the third intermediate mode. The third intermediate mode includes the fifth resonant current generated by the antenna radiator 10 between the feeding point 13 and the free end 11, and the sixth resonant current generated by the antenna radiator 10 between the first grounding member 40 and the electrical connection point 14 and the feeding point 13. The flow 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 intermediate mode. The sixth resonant current of the third intermediate mode is a reverse resonant current generated on the antenna radiator 10 between the first grounding member 40 and the electrical connection point 14 and the feeding point 13 .

[0083] In a possible embodiment, the third frequency band is located in the UHF frequency band, and the sixth frequency band is located in the UHF frequency band and is higher than the third frequency band. By making the third frequency band located in the UHF frequency band and the sixth frequency band located in the UHF frequency band and is higher than the third frequency band, it is possible to achieve that the frequency bands supported by the antenna unit 100 cover more and continuous UHF frequency bands.

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

[0085] Specifically, by designing the material, width, length, etc. of the first grounding member 40, 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 is less than or equal to the preset difference. The material of the first grounding member 40 may be metal, alloy, etc. The width of the first grounding member 40 may 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 member 40 may 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 design of the preset difference needs to satisfy that part of the resonant current of the first resonant mode and the resonant current of the first intermediate mode can be returned to the ground through the electrical connection point 14 and the grounding circuit, and the other part of the resonant current can be returned to the ground through the grounding terminal 12, that is, the design of the preset difference needs to satisfy that the antenna radiator 10 between the grounding terminal 12 and the electrical connection point 14 will not be short-circuited. In a possible implementation, the difference between the impedance value of the antenna radiator 10 between the ground terminal 12 and the electrical connection point 14 and the impedance value of the first grounding member 40 may be less than or equal to 5 ohms. For example, the impedance value of the antenna radiator 10 between the ground terminal 12 and the electrical connection point 14 and the impedance value of the first grounding member 40 may be equal, that is, the difference between the impedance value of the antenna radiator 10 between the ground terminal 12 and the electrical connection point 14 and the impedance value of the first grounding member 40 may be equal to zero.

[0086] By making the difference between the impedance value of the antenna radiator 10 between the ground terminal 12 and the electrical connection point 14 and the impedance value of the first grounding member 40 less than or equal to the preset difference, it is possible to achieve that the first grounding member 40 and the antenna radiator 10 between the ground 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 without making any improvements or with simple improvements to the first tuning circuit 30, and to achieve that the first grounding member 40 and the antenna radiator 10 between the ground terminal 12 and the free end 11 generate a first intermediate mode supporting the fourth frequency band under the excitation of the feed source 20.

[0087] In a possible embodiment, Fig.11 As shown, the first grounding member 40 is a grounding wire. The first grounding member 40 can be arranged in parallel with the antenna radiator 10, or can be arranged to intersect with the antenna radiator 10. In the following embodiments, the first grounding member 40 is arranged in parallel with the antenna radiator 10 as an example. The first grounding member 40 is arranged in parallel with the antenna radiator 10, which is easier to implement in electronic devices 1000 such as mobile phones. In this embodiment, the first grounding member 40 is designed as a grounding wire. Since the grounding wire can be regarded as a pure impedance element for alternating current and no parasitic parameters are introduced, compared with the technical solution in which the first grounding member 40 is a grounding circuit with devices such as inductors and / or capacitors, the radiation efficiency of the antenna unit 100 is higher and the broadband effect is better.

[0088] like Fig.11 As shown, the antenna unit 100 also includes a second grounding member 60. The second grounding member 60 can be a grounding wire, or a grounding circuit having devices such as inductors and / or capacitors. The second grounding member 60 is electrically connected between the ground terminal 12 and the reference floor 200. In other words, one end of the second grounding member 60 is electrically connected to the ground terminal 12, and the other end of the second grounding member 60 is electrically connected to the reference floor 200. The second grounding member 60 and the ground terminal 12 can be directly electrically connected, or they can be indirectly electrically connected through conductive members such as metal springs. The second grounding member 60 and the reference floor 200 can be directly electrically connected, or they can be indirectly electrically connected through conductive members such as metal springs. In the following embodiments, the direct electrical connection between the second grounding member 60 and the ground terminal 12 and the direct electrical connection between the second grounding member 60 and the reference floor 200 are taken as examples.

[0089] The antenna unit 100 of this embodiment has the same scheme as the antenna unit 100 of the embodiment in which the ground terminal 12 is directly electrically connected to the reference floor 200 in generating the second resonant mode, the third resonant mode, the second intermediate mode and the third intermediate mode. The difference between the two lies in that: 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 of the antenna unit 100 of this embodiment generate the first resonant mode under the excitation of the feed source; and 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 of the antenna unit 100 of this embodiment 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 of 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 member 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, and the difference between the target impedance value and the impedance value of the first grounding member 40 is less than or equal to the preset difference.

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

[0092] By making the difference between the target impedance value and the impedance value of the first grounding member 40 less than or equal to the preset difference, in an embodiment in which the grounding terminal 12 and the reference floor 200 are electrically connected through the second grounding member 60, the first grounding member 40, the second grounding member 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 member 40, the second grounding member 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 member 60 is a grounding wire. The second grounding member 60 can be arranged in parallel with the antenna radiator 10, or can be arranged to intersect with the antenna radiator 10. In the following embodiments, the second grounding member 60 is arranged in parallel with the antenna radiator 10 as an example. The second grounding member 60 is arranged in parallel with the antenna radiator 10, which is easier to implement in electronic devices 1000 such as mobile phones. In this embodiment, the second grounding member 60 is designed as a grounding wire. Since the grounding wire can be considered as a pure impedance element for alternating current and no parasitic parameters are introduced, compared with the technical solution in which the second grounding member 60 is a grounding circuit with devices such as inductors and / or capacitors, the radiation efficiency of the antenna unit 100 is higher and the broadband effect is better.

[0094] The length of the second grounding member 60 is less than the length of the first grounding member 40. The length of the second grounding member 60 can be referred to in the attached Fig.11In this embodiment, when the first grounding member 40 is a grounding wire and the second grounding member 60 is a grounding wire, that is, the material of the first grounding member 40 is the same as that of the second grounding member 60, and the width of the first grounding member 40 is the same as or nearly the same as that of the second grounding member 60, the sum of the impedance value of the second grounding member 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, and the difference between the target impedance value and the impedance value of the first grounding member 40 is less than or equal to the preset difference.

[0095] In a possible embodiment, Fig.12 As shown, 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 feeding 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. Fig.12 The length of the antenna radiator 10 between the electrical connection point 14 and the feeding point 13 can be referred to in the attached Fig.12 As shown in L6. It can be understood that 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 feeding point 13 can be greater than or equal to 1 / 4 of the overall length of the first inverted F-type antenna, and less than or equal to 3 / 4 of the overall length of the first inverted F-type antenna. For example: when the overall length of the first inverted F-type antenna is 30mm to 60mm, 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 feeding point 13, that is, the sum of L1 and L6 can be 7.5mm to 45mm.

[0096] By making 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 feeding point 13 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 making any improvements or simply making any improvements to the first tuning circuit 30, that the first grounding member 40, the antenna radiator 10 between the electrical connection point 14 and the free end 11, under the excitation of the feed source 20, generate a second resonant mode supporting the second frequency band; and that the antenna radiator 10 between the feeding point 13 and the free end 11, under the excitation of the feed source 20, generate a third resonant mode supporting the third frequency band.

[0097] Please refer to Fig.13 and Fig.14, the reference floor 200 includes a first edge 21 and a second edge 22 connected by a bend. The connection between 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 section 101 and a second radiating section 102 connected by a bend. The first radiating section 101 is located on the side of the first edge 21 away from the center of the reference floor 200, and the second radiating section 102 is located on the side of the second edge 22 away from the center of the reference floor 200.

[0098] The present application does not specifically limit the bending manner between the first edge 21 and the second edge 22. For example: the first edge 21 and the second edge 22 may be bent at a right angle; or, the first edge 21 and the second edge 22 may be bent in an arc shape; or, the first edge 21 and the second edge 22 may be bent in a special shape, etc. In the following embodiments, the right angle bend between the first edge 21 and the second edge 22 is taken as an example. In a possible embodiment, 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 embodiment of the present 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. 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 disposed opposite to each other along the length direction of the electronic device 1000 ; and the second edge 22 and the fourth edge 24 may be disposed opposite to each other along the width direction of the electronic device 1000 .

[0099] In a possible embodiment, Fig.13 As shown, the antenna radiator 10 is located on the side of the first edge 21 away from the center of the reference floor 200. In this embodiment, the antenna radiator 10 is arranged on one side of the reference floor 200, which is conducive to the antenna radiator 10 mainly exciting the resonant current along the first edge 21, so that the radiation energy of the antenna radiator 10 is more concentrated, which is conducive to extending the radiation distance of the antenna unit 100.

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

[0101] In this embodiment, the antenna radiator 10 is arranged at the corner position of the reference floor 200, which is beneficial for the antenna radiator 10 to excite the floor current along the first edge 21 and the floor current along the second edge 22 on the reference floor 200, so that the current distribution of the reference floor 200 is more uniform, and the radiation in two orthogonal directions can be taken into account; and it is beneficial to disperse the specific absorption rate (SAR) hot spots to reduce the SAR value of the electronic device 1000. In addition, the antenna radiator 10 is arranged at the corner position of the reference floor 200, so that the antenna radiator 10 can excite the floor current along the first edge 21 and the floor current along the second edge 22 on the reference floor 200, and can also reduce the reverse current on the reference floor 200, thereby improving the radiation efficiency of the antenna unit 100.

[0102] like Fig.15 As shown, the antenna unit 100 excites a first floor current along the first edge 21 and a second floor current along the second edge 22 on the reference floor 200 . Fig.15 The middle dashed line a indicates a first floor current along the first edge 21 excited by the antenna unit 100 on the reference floor 200 . Fig.15The middle dotted line b indicates the second floor current along the second edge 22 excited by the antenna unit 100 on the reference floor 200. It should be noted that the first floor current along the first edge 21 in the present application can be a current parallel to the first edge 21, or a current nearly parallel to the first edge 21. The second floor 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, the antenna unit 100 can also excite a third floor current c on the reference floor 200 that is close to the direction of the first floor current, a fourth floor current d that is close to the direction of the second floor current, and a fifth floor current e that is located between the third floor current and the fourth floor current, etc.

[0103] The antenna unit 100 excites a first floor current along the first edge 21 and a second floor current along the second edge 22 on the reference floor 200. The first resonant mode of the antenna unit 100 excites a first floor current along the first edge 21 and a second floor current along the second edge 22 on the reference floor 200; and / or, the second resonant mode of the antenna unit 100 excites a first floor current along the first edge 21 and a second floor current along the second edge 22 on the reference floor 200; and / or, the third resonant mode of the antenna unit 100 excites a first floor current along the first edge 21 and a second floor current along the second edge 22 on the reference floor 200. 1 and a second floor current along the second edge 22; and / or, the first intermediate mode of the antenna unit 100 excites a first floor current along the first edge 21 and a second floor current along the second edge 22 on the reference floor 200; and / or, the second intermediate mode of the antenna unit 100 excites a first floor current along the first edge 21 and a second floor current along the second edge 22 on the reference floor 200; and / or, the third intermediate mode of the antenna unit 100 excites a first floor current along the first edge 21 and a second floor current along the second edge 22 on the reference floor 200.

[0104] Since the antenna unit 100 excites the first floor current along the first edge 21 and the second floor current along the second edge 22 on the reference floor 200, the antenna unit 100 can take into account the radiation along the first edge 21 and the radiation along the second edge 22, that is, take into account the radiation in two directions. In the embodiment of the present application, when the first edge 21 and the second edge 22 are bent at a right angle, the antenna unit 100 takes into account the radiation in two orthogonal directions, which is conducive to achieving omnidirectional coverage. In addition, the antenna unit 100 excites the first floor current along the first edge 21 and the second floor current along the second edge 22 on the reference floor 200, so that the radiation energy of the antenna unit 100 is dispersed around the first edge 21 and the second edge 22, and multiple SAR hotspots can be formed, which can reduce the SAR value in a single direction.

[0105] In a 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 the present application, the intensity of the first floor current being stronger than the intensity of the second floor current may include the intensity of the first floor current in the first resonance mode being stronger than the intensity of the second floor current; and / or, the intensity of the first floor current in the second resonance mode being stronger than the intensity of the second floor current; and / or, the intensity of the first floor current in the third resonance mode being stronger than the intensity of the second floor current; and / or, the intensity of the first floor current in the first intermediate mode being stronger than the intensity of the second floor current; and / or, the intensity of the first floor current in the second intermediate mode being stronger than the intensity of the second floor current; and / or, the intensity of the first floor current in the third intermediate mode being stronger than the intensity of the second floor current.

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

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

[0109] In a possible embodiment, Fig.16As shown, the ground terminal 12 is located on the side of the free end 11 close to the floor corner point 25. Since the ground terminal 12 is the return point of part of the resonant current of the first resonant mode of the second inverted F-type antenna, the ground terminal 12 is located on the side of the free end 11 close to the floor corner point 25, which is conducive to the first resonant mode of the antenna unit 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, so that the first resonant mode of the antenna unit 100 can take into account the radiation in two orthogonal directions, improve the radiation omnidirectionality of the first resonant mode of the antenna unit 100, make the resonant current of the first resonant mode of the antenna unit 100 more uniformly distributed, can form multiple SAR hot spots, and can reduce the SAR value of the first resonant mode. Among them, when the ground 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 side of the floor corner point 25 than the end of the second grounding member 60 electrically connected to the ground terminal 12.

[0110] In addition, since part of the resonant current of the first intermediate mode also returns to the ground through the ground terminal 12, the ground terminal 12 is located on the side of the free end 11 close to the floor corner point 25, which is also beneficial for the first intermediate mode of the antenna unit 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, so that the first intermediate mode of the antenna unit 100 can take into account the radiation in two orthogonal directions, improve the radiation omnidirectionality of the first intermediate mode of the antenna unit 100, make the resonant current distribution of the first intermediate mode of the antenna unit 100 more uniform, can form multiple SAR hotspots, and can reduce the SAR value of the first intermediate mode.

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

[0112] When the distance between the projection point of the ground terminal 12 on the reference floor 200 and the floor corner point 25 is less than or equal to 1 / 16 wavelength of the first frequency band, at this time, the distance between the ground terminal 12 and the floor corner point 25 is small, and the current distribution excited by the first resonant mode and the first intermediate mode of the antenna unit 100 on the reference floor 200 can refer to the attached Fig.15 The reference floor 200 has a first floor current along the first edge 21 and a third floor current close to the direction of the first floor current, a second floor current along the second edge 22 and a fourth floor current close to the direction of the second floor current, and a fifth floor current between the third floor current and the fourth floor current. However, the maximum angle of the current distribution on the reference floor 200 is approximately the angle between the first floor current and the second floor current, and the angle between the first floor current and the second floor current is close to 90°. Therefore, there are almost no currents on the reference floor 200 that are opposite in direction and cancel each other out, thereby improving the radiation efficiency of the antenna unit 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, Fig.17 As shown, the other end of the first grounding member 40 is located on one side of one end of the first grounding member 40 close to the floor corner point 25. Since the other end of the first grounding member 40 is the return point of another 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, the other end of the first grounding member 40 is located on one side of one end of the first grounding member 40 close to the floor corner point 25, which is conducive to the first resonant mode of the antenna unit 100 exciting the first floor current along the first edge 21 and the second floor current along the second edge 22 on the reference floor 200, and the second resonant mode exciting the first floor current along the first edge 21 and the second floor current along the second edge 22 on the reference floor 200, so that the first resonant mode and the second resonant mode of the antenna unit 100 can take into account the radiation in two orthogonal directions, improve the radiation omnidirectionality of the first resonant mode and the second resonant mode of the antenna unit 100, make the resonant current distribution of the first resonant mode and the second resonant mode of the antenna unit 100 more uniform, can form multiple SAR hotspots, and can reduce the SAR value of the first resonant mode.

[0114] In addition, since another part of the resonant current of the first intermediate mode, part of the resonant current of the second intermediate mode, and part of the resonant current of the third intermediate mode also return to the 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 one end of the grounding member 40 close to the floor corner point 25, which is also beneficial for the first intermediate mode, the second intermediate mode, and the third intermediate mode of the antenna unit 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, so that the first intermediate mode, the second intermediate mode, and the third intermediate mode of the antenna unit 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 unit 100, make the resonant current distribution of the first intermediate mode, the second intermediate mode, and the third intermediate mode of the antenna unit 100 more uniform, can form multiple SAR hotspots, and can reduce the SAR values ​​of the first intermediate mode, the second intermediate mode, and the third intermediate mode.

[0115] Optional, such as Fig.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 wavelength of the first frequency band. Fig.17 For example, when the first frequency band is a medium-high 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 may be less than or equal to 15 mm.

[0116] When 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 wavelength of the first frequency band, at this time, the distance between the other end of the first grounding member 40 and the floor corner point 25 is small, and the current distribution excited by the first resonant mode, the second resonant mode, the first intermediate mode, the second intermediate mode, and the third intermediate mode of the antenna unit 100 on the reference floor 200 can refer to the attached Fig.15The reference floor 200 has a first floor current along the first edge 21 and a third floor current close to the direction of the first floor current, a second floor current along the second edge 22 and a fourth floor current close to the direction of the second floor current, and a fifth floor current between the third floor current and the fourth floor current. However, the maximum angle of the current distribution on the reference floor 200 is approximately the angle between the first floor current and the second floor current, and the angle between the first floor current and the second floor current is close to 90°. Therefore, there are almost no currents on the reference floor 200 that are opposite in direction and cancel each other out, thereby improving the radiation efficiency of the antenna unit 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 a possible embodiment, Fig.18 As shown, the length of the first edge 21 is greater than the length of the second edge 22. The first edge 21 may correspond to the sub-frame setting in the length direction of the electronic device 1000, and the second edge 22 may correspond to the sub-frame setting in the width direction of the electronic device 1000; or, the first edge 21 may correspond to the sub-frame setting in the width direction of the electronic device 1000, and the second edge 22 may correspond to the sub-frame setting in the length direction of the electronic device 1000. In the embodiment of the present application, the first edge 21 with a longer length corresponds to the sub-frame 300 setting in the length direction of the electronic device 1000, and the second edge 22 with a shorter length corresponds to the sub-frame 300 setting in the width direction of the electronic device 1000. For example: the first edge 21 corresponds to the first sub-frame 31, that is, the extension direction of the first edge 21 is the same or substantially the same as the extension direction of the first sub-frame 31; the second edge 22 corresponds to the second sub-frame 32, that is, the extension direction of the second edge 22 is the same or substantially the same as the extension direction of the second sub-frame 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 floor current along the first edge 21 excited by the antenna unit 100 on the reference floor 200 is longer, so that the intensity of the first floor current along the first edge 21 excited by the antenna unit 100 on the reference floor 200 can be stronger than the intensity of the second floor current along the second edge 22. At this time, 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-hand-grip performance of the electronic device 1000.

[0119] like Fig.19As shown, when the antenna radiator 10 includes a first radiating section 101 and a second radiating section 102 connected in a bent manner. When the first radiating section 101 is located on the side of the first edge 21 away from the center of the reference floor 200, and the second radiating section 102 is located on the side of the second edge 22 away from the center of the reference floor 200, the projection point of the feed point 13 on the reference floor 200 and the projection point of the free end 11 on the reference floor 200 are both located on the first edge 21. In this embodiment, the feed point 13 is located in the first radiating section 101. Among them, the feed source 20, the first tuning circuit 30, the first grounding member 40, and the second grounding member 60 can be located in the space enclosed by the first radiating section 101 and the second radiating section 102. In other words, the feed source 20, the first tuning circuit 30, the first grounding member 40, and the second grounding member 60 are all located on the inner side of the antenna radiator 10. The feed source 20, the first tuning circuit 30, and the first grounding member 40 are all located on the inner side of the antenna radiator 10, which is conducive to 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 unit 100. The electrical connection point 14 can be located in the second radiation section 102 or in the first radiation section 101. The electrical connection point 14 is located in the second radiation section 102, which facilitates the layout of the feed source 20, the first tuning circuit 30, and the first grounding member 40.

[0120] Fig.19 The middle dotted line illustrates the resonant current distribution of the third resonant mode of the antenna unit 100. Since the feeding point 13 is located in the first radiation section 101, the resonant current of the third resonant mode of the antenna unit 100 in the antenna radiator 10 is concentrated in the first radiation section 101. In addition, the feeding point 13 is electrically connected to the first tuning circuit 30, so the return point of the antenna unit 100 in the third resonant mode is also located in the first radiation section 101, and the intensity of the first floor current along the first edge 21 excited by the third resonant mode of the antenna unit 100 on the reference floor 200 is enhanced. Thereby, the radiation energy of the third resonant mode of the antenna unit 100 can be concentratedly distributed in the length direction of the electronic device 1000 or the width direction of the electronic device 1000, so as to improve the radiation efficiency or anti-hand-grip performance of the antenna unit 100 in the third resonant mode.

[0121] In addition, the feeding point 13 is located in the first radiation section 101, and the resonant currents of the second intermediate mode and the third intermediate mode of the antenna unit 100 in the antenna radiator 10 are also concentrated in the first radiation section 101. The return points of some resonant currents of the second intermediate mode and the third intermediate mode of the antenna unit 100 are also located in the first radiation section 101, and the intensity of the first floor current along the first edge 21 excited by the second intermediate mode and the third intermediate mode of the antenna unit 100 on the reference floor 200 is also enhanced. As a result, the radiation energy of the second intermediate mode and the third intermediate mode of the antenna unit 100 can be concentratedly distributed in the length direction of the electronic device 1000 or the width direction of the electronic device 1000, so as to improve the radiation efficiency or anti-hand-grip performance of the antenna unit 100 in the second intermediate mode and the third intermediate mode.

[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 wavelength of the first frequency band. Fig.19 For example, when the first frequency band is a medium-high frequency band, the distance between the projection point of the feed point 13 on the reference floor 200 and the floor corner point 25 may be less than or equal to 15 mm.

[0123] When 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 wavelength of the first frequency band, at this time, the distance between the feed point 13 and the floor corner point 25 is small, and the current distribution excited by the antenna unit 100 on the reference floor 200 in the third resonant mode, the second intermediate mode, and the third intermediate mode can refer to the attached Fig.15 The reference floor 200 has a first floor current along the first edge 21 and a third floor current close to the direction of the first floor current, a second floor current along the second edge 22 and a fourth floor current close to the direction of the second floor current, and a fifth floor current between the third floor current and the fourth floor current. However, the maximum angle of the current distribution on the reference floor 200 is approximately the angle between the first floor current and the second floor current, and the angle between the first floor current and the second floor current is close to 90°. Therefore, there are almost no currents on the reference floor 200 that are opposite in direction and cancel each other out, thereby improving the radiation efficiency of the antenna unit 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, if Fig. 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. The present application does not specifically limit the number of capacitors and the number of 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 200. The second tuning circuit 50 and the other end of the first grounding member 40 may be electrically connected directly or indirectly via an electrical connector such as a metal spring. The second tuning circuit 50 and the reference ground 200 may be electrically connected directly or indirectly via an electrical connector such as a metal spring.

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

[0127] The second tuning circuit 50 may also be electrically connected between the ground terminal 12 and the reference ground 200 ; or, the second tuning circuit 50 may 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, thereby reducing the design difficulty of the first tuning circuit 30 and the second tuning circuit 50, and facilitating the impedance matching performance of the antenna unit 100 in multiple modes.

[0129] In a possible embodiment, the reference floor 200, the feed source 20, the first tuning circuit 30, the first grounding member 40, and the second grounding member 60 may be located in a containing space surrounded by the frame 300, and the antenna radiator 10 may be disposed on the frame 300. In another possible embodiment, the reference floor 200, the feed source 20, the first tuning circuit 30, the first grounding member 40, the second grounding member 60, and the antenna radiator 10 may all be located in a containing space surrounded by the frame 300.

[0130] Among them, the first frequency band and the second frequency band are located in the medium and high frequency bands, and the third frequency band is located in the ultra-high frequency band. Fig.21 As shown, Fig.21 for Fig.18 Graphs of return loss and efficiency of electronic device 1000 are shown. Fig.21 The middle curve f is a return loss curve of the electronic device 1000 . Fig.21 Point 1 of the middle curve f corresponds to the resonant frequency of the first resonant mode, that is, the center frequency of the first frequency band. Fig.21 The two points on the middle curve f correspond to the resonant frequency of the second resonant mode, that is, the center frequency of the second frequency band. Fig.21 The three points of the middle curve f correspond to the resonant frequency of the third resonant mode, that is, the center frequency of the third frequency band. The first intermediate mode does not form an obvious resonant frequency, and is implicitly between the resonant frequency of the first resonant mode and the resonant frequency of the second resonant mode. The second intermediate mode does not form an obvious resonant frequency, and is implicitly between the resonant frequency of the second resonant mode and the resonant frequency of the third resonant mode. The third intermediate mode does not form an obvious resonant frequency, and is implicitly on the right side of the resonant frequency of the third resonant mode. It should be noted that: since the impedance change of the antenna unit 100 provided in the present application is relatively uniform, the first intermediate mode, the second intermediate mode, and the third intermediate mode will not form an obvious resonance, and are implicitly between the first resonant mode, the second resonant mode, and the third resonant mode. However, the existence of these intermediate modes will make the overall impedance change uniform within the frequency band of the entire first resonant mode, the second resonant mode, and the third resonant mode and between them, that is, the impedance bandwidth is expanded to form a wide wave. Fig.21 The middle curve g is the free efficiency curve of the electronic device 1000 . Fig.21 The middle curve h is the radiation efficiency curve of the electronic device 1000. Fig.21 From the middle curves f, g, and h, we can see that the first, second, fourth, and fifth frequency bands basically cover all the medium and high frequency bands; the third and sixth frequency bands cover the 3.7GHz ultra-high frequency band. The first, second, third, fourth, fifth, and sixth frequency bands achieve continuous ultra-wideband.

[0131] like Fig. 22 As shown, Fig. 22 for Fig.19 Graphs of return loss and efficiency of electronic device 1000 are shown. Fig. 22 Point 1 of the middle curve j corresponds to the resonant frequency of the first resonant mode, that is, the center frequency of the first frequency band. Fig. 22 The two points on the middle curve j correspond to the resonant frequency of the second resonant mode, that is, the center frequency of the second frequency band. Fig. 22 The 3 points of the middle curve j correspond to the resonant frequency of the third resonant mode, that is, the center frequency of the third frequency band. The first intermediate mode does not form an obvious resonant frequency, and is implicitly between the resonant frequency of the first resonant mode and the resonant frequency of the second resonant mode. The second intermediate mode does not form an obvious resonant frequency, and is implicitly between the resonant frequency of the second resonant mode and the resonant frequency of the third resonant mode. The third intermediate mode does not form an obvious resonant frequency, and is implicitly on the right side of the resonant frequency of the third resonant mode. Fig. 22 The middle curve k is the free efficiency curve of the electronic device 1000 . Fig. 22 The middle curve m is the radiation efficiency curve of the electronic device 1000. Fig. 22 From the middle curves j, k and m, it can be seen that the first frequency band, the second frequency band, the fourth frequency band and the fifth frequency band basically cover all the medium and high frequency bands; the third frequency band and the sixth frequency band cover the ultra-high frequency band of 3.7 GHz. 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 realize a continuous ultra-wideband. Compared with the above-mentioned embodiment, the antenna radiator 10 of the antenna unit 100 of this embodiment adopts a corner design, that is, the antenna radiator 10 includes a first radiation section 101 and a second radiation section 102 connected by bending, which excites part of the transverse mode, so the free efficiency in the third frequency band (N78) is slightly reduced.

[0132] like Fig.23 As shown, Fig.23 for Fig.19 The SAR value test chart of the electronic device 1000 is shown. Fig.23 The 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 reduced compared with the top SAR value of the electronic device 1000 of 1.2 W / kg in the related art; 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 significantly reduced compared with the top SAR value of the electronic device 1000 of 1.2 W / kg in the related art.

[0133] like Fig.24As shown, the antenna unit 100 also includes a parasitic branch 16. A coupling gap is formed between one end of the parasitic branch 16 and the free end 11, and the other end of the parasitic branch 16 is electrically connected to the reference floor 200. The parasitic branch 16 generates a fourth resonant mode supporting the seventh frequency band under the excitation of the feed source 20. The size of the coupling gap between the parasitic branch 16 and the free end 11 can be 0.5mm to 2mm. The parasitic branch 16 can be directly electrically connected to the reference floor 200, or it can be indirectly electrically connected through electrical connectors such as metal shrapnel. The present application does not specifically limit the material and length of the parasitic branch 16. For example: the material of the parasitic branch 16 can be metal, alloy, etc. The length of the parasitic branch 16 satisfies that the parasitic branch 16 can support the seventh frequency band under the excitation of the feed source 20. For example: the seventh frequency band can be a mobile hotspot (Wi-Fi) 5G band or a Bluetooth (BitTorrent, BT) 5G band. By providing the parasitic branches 16 , the antenna unit 100 can support more frequency bands.

[0134] The features mentioned in the specification, claims and drawings can be arbitrarily combined with each other as long as they are meaningful within the scope of this application. Although the embodiments of the present application have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations on the present application. Ordinary technicians in this field can change, modify, replace and modify the above embodiments within the scope of this application, and these improvements and modifications are also regarded as the protection scope of this application.

Claims

1. An electronic device, characterized in that: include: Reference floor; and An antenna unit, comprising an antenna radiator, a feed source, a first tuning circuit and a first grounding member, wherein one end of the antenna radiator forms a free end, the other end of the antenna radiator forms a grounding end, the grounding end is electrically connected to the reference ground, a feeding point and an electrical connection point arranged on a side of the feeding point away from the free end are provided between the free end and the grounding end, the feeding point is electrically connected to the feed source through the first tuning circuit, one end of the first grounding member is electrically connected to the electrical connection point, and the other end of the first grounding member is electrically connected to the reference ground; Among them, the first grounding member, the antenna radiator between the ground end and the free end generates a first resonance mode supporting the first frequency band under the excitation of the feed source; the first grounding member, the antenna radiator between the electrical connection point and the free end generates a second resonance mode supporting the second frequency band under the excitation of the feed source; the antenna radiator between the feeding point and the free end generates a third resonance mode supporting the 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, the first resonance mode includes the first grounding member, a 1 / 4 wavelength mode generated by the antenna radiator between the electrical connection point and the free end, and a 1 / 4 wavelength mode generated by the antenna radiator between the ground end and the free end; the second resonance mode is a 1 / 4 wavelength mode; The third resonance mode is a 1 / 4 wavelength mode.

3. The electronic device according to claim 2, characterized in that: The first grounding member and the antenna radiator between the ground end and the free end also generate a first intermediate mode supporting a fourth frequency band under the excitation of the feed source, and the fourth frequency band is 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 member 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 ground end and the electrical connection point, and the intensity of the second resonant current is 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 member and the electrical connection point and the free end also generates a second intermediate mode supporting a fifth frequency band under the excitation of the feed source, and the fifth frequency band is 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 feeding point and the free end, and a fourth resonant current generated by the antenna radiator between the first grounding member and the electrical connection point and the feeding point. The flow 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 the intensity of the third resonant current.

5. The electronic device according to claim 2, characterized in that: The antenna radiator between the first grounding member and the electrical connection point and the free end also generates a third intermediate mode supporting a sixth frequency band under the excitation of the feed source, and the sixth frequency band is higher than the third frequency band. The third intermediate mode includes a fifth resonant current generated by the antenna radiator between the feeding point and the free end, and a sixth resonant current generated by the antenna radiator between the first grounding member and the electrical connection point and the feeding point. The flow 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: A difference between an impedance value of the antenna radiator between the ground terminal and the electrical connection point and an impedance value of the first grounding member 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 first grounding member is a grounding wire; the antenna unit also includes a second grounding member, which is electrically connected between the grounding end and the reference floor; the sum of the impedance value of the second grounding member and the impedance value of the antenna radiator between the grounding end 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 member is less than or equal to the preset difference; the first grounding member, the second grounding member and the antenna radiator between the grounding end 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 member is a grounding wire, and the length of the second grounding member is shorter than the length of the first grounding member.

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 member and the length of the antenna radiator between the electrical connection point and the feeding 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 connected in a bending manner, the connection between the first edge and the second edge forms a floor corner point, and 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 section and a second radiating section connected in a bending manner, the first radiating section is located on the side of the first edge away from the center of the reference floor, and the second radiating section 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 unit excites a first floor current along the first edge and a second floor current along the second edge on the reference floor, and the intensity of the first floor current is stronger than the intensity of the second floor current.

12. The electronic device according to claim 10, characterized in that: The grounding end is located on a side of the free end close to the corner point of the floor, and / or the other end of the first grounding piece is located on a side of one end of the grounding piece close to the corner point of the floor.

13. The electronic device according to claim 12, characterized in that: The distance between the projection point of the grounding end on the reference floor and the corner point of the floor is less than or equal to 1 / 16 wavelength of the first frequency band, and / or the distance between the projection point of the other end of the first grounding piece on the reference floor and the corner point of the floor is less than or equal to 1 / 16 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 that of the second edge, and the projection point of the feeding point on the reference floor and the projection point 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 feeding point on the reference floor and the corner point of the floor is less than or equal to 1 / 16 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 medium and high frequency bands, 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 also includes a second tuning circuit, which is electrically connected between the other end of the first grounding piece and the reference ground, and 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 unit also includes a parasitic branch, a coupling gap is formed between one end of the parasitic branch and the free end, the other end of the parasitic branch is electrically connected to the reference ground, and the parasitic branch generates a fourth resonant mode supporting the seventh frequency band under the excitation of the feed source.

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