Antenna assembly and electronic equipment

Abstract

The invention provides an antenna assembly and electronic equipment, the antenna assembly comprises a first radiator, a second radiator and a feed source, the first radiator comprises a first open end, a feed point and a second open end; the second radiator comprises a third open end, a grounding point and a fourth open end, and a coupling gap is formed between the second open end and the third open end; the feed source is electrically connected with the feed point, the feed source is used for exciting the first radiator and the second radiator to at least form a first resonant mode supporting a first frequency band, and the distance between the feed point and the first open end is smaller than or equal to 1 / 8 wavelength of the resonant frequency of the first frequency band; the resonant current of the first resonant mode comprises a first sub-current on the first radiator and a second sub-current on the second radiator, and the direction of the first sub-current is the same as that of the second sub-current, so that the radiation aperture is increased, and the efficiency of the antenna assembly working at the first frequency band is further improved.

Description

Technical Field

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

[0002] With the widespread application of electronic devices, the usage scenarios of electronic devices are becoming more and more complex. For example, electronic devices are in a weak field environment, far away from base stations, or in handheld state. These scenarios lead to reduced efficiency of antennas. Based on this, how to further improve the efficiency of antennas has become a technical problem that needs to be solved. Summary of the invention

[0003] The present application provides an electronic device that further improves the working efficiency of an antenna.

[0004] In a first aspect, the present application provides an antenna assembly, comprising:

[0005] A first radiator, the first radiator comprising a first open end, a feeding point, and a second open end;

[0006] A second radiator, the second radiator comprising a third open end, a ground point, and a fourth open end, and a coupling gap is formed between the second open end and the third open end;

[0007] A feed source, the feed source is electrically connected to the feed point, the feed source is used to excite the first radiator and the second radiator to form at least a first resonance mode supporting a first frequency band, the distance between the feed point and the first open end is less than or equal to 1 / 8 wavelength of the resonance frequency of the first frequency band, the resonance current of the first resonance mode includes a first sub-current on the first radiator and a second sub-current on the second radiator, and the direction of the first sub-current is the same as the direction of the second sub-current.

[0008] The present application provides an antenna assembly, which includes a first radiator, a second radiator and a feed source, wherein the first radiator includes a first open end, a feeding point and a second open end; the second radiator includes a third open end, a grounding point and a fourth open end, and a coupling gap is formed between the second open end and the third open end; the feed source is electrically connected to the feeding point, and the feed source is used to excite the first radiator and the second radiator to form at least a first resonant mode supporting a first frequency band, the distance between the feeding point and the first open end is less than or equal to 1 / 8 wavelength of the resonant frequency of the first frequency band, and the resonant current of the first resonant mode includes a first sub-current on the first radiator and a second sub-current on the second radiator, and the direction of the first sub-current is the same as the direction of the second sub-current, so that when the antenna assembly operates in the first frequency band, a resonant current can be formed on the first radiator and a resonant current can be formed on the second radiator, and the radiation aperture of the antenna assembly when operating in the first frequency band is increased, thereby improving the efficiency of the antenna assembly when operating in the first frequency band.

[0009] In a second aspect, the present application provides an electronic device comprising the antenna assembly as described in the first aspect. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] 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.

[0011] Figure 1 It is a structural schematic diagram of an electronic device provided in an embodiment of the present application;

[0012] Figure 2 is a partial exploded schematic diagram of an electronic device provided in an embodiment of the present application;

[0013] Figure 3 It is a partial back view of the electronic device provided by the embodiment of the present application without the back cover;

[0014] Figure 4 is a structural schematic diagram of an antenna assembly provided in an embodiment of the present application;

[0015] Figure 5 is a schematic diagram of the distribution of the resonant current of the first resonant mode on the antenna assembly provided in an embodiment of the present application;

[0016] Figure 6 is a schematic diagram of a simulation of a resonant current of a first resonant mode on an antenna assembly provided in an embodiment of the present application;

[0017] Figure 7 is a schematic diagram of the distribution of the resonant current of the second resonant mode on the antenna assembly provided in an embodiment of the present application;

[0018] Figure 8 is a schematic diagram of a simulation of a resonant current of a second resonant mode on an antenna assembly provided in an embodiment of the present application;

[0019] Fig. 9 is a schematic diagram of an S-parameter curve of a first resonant mode and a second resonant mode formed by an antenna assembly provided in an embodiment of the present application;

[0020] Fig.10 is a schematic diagram of the distribution of the resonant current of the third resonant mode on the antenna assembly provided in an embodiment of the present application;

[0021] Fig.11 is a schematic diagram of a simulation of a resonant current of a third resonant mode on an antenna assembly provided in an embodiment of the present application;

[0022] Fig.12 It is a schematic diagram of S parameter curves of the antenna assembly provided in an embodiment of the present application forming a first resonant mode, a second resonant mode and a third resonant mode;

[0023] Fig.13 is a schematic diagram of the distribution of the resonant current of the fourth resonant mode on the antenna assembly provided in an embodiment of the present application;

[0024] Fig.14 is a schematic diagram of a simulation of a resonant current of a fourth resonant mode on an antenna assembly provided in an embodiment of the present application;

[0025] Fig.15 It is a schematic diagram of S parameter curves of the first resonant mode, the second resonant mode, the third resonant mode, and the fourth resonant mode formed by the antenna assembly provided in an embodiment of the present application;

[0026] Fig.16 This is a schematic diagram of a scenario in which an electronic device provided by an embodiment of the present application is held with both hands in landscape mode;

[0027] Fig.17 is an S parameter curve of the electronic device provided in the embodiment of the present application in free space and in a horizontal screen two-handed holding scenario;

[0028] Fig.18 This is the efficiency curve of the electronic device provided by the embodiment of the present application in free space and in the horizontal screen two-handed holding scenario.

[0029] Description of some figures:

[0030] Electronic device 1000; antenna assembly 100; display screen 200; middle frame 300; back cover 400; middle plate 310; frame 320; main circuit board 600; battery 700; sub-plate 800; top frame 321; bottom frame 324; first side frame 322; second side frame 323; antenna assembly 100; first radiator 10; second radiator 20; feed source 30; first opening end E1; feeding point A; second opening end E2; third opening end E3; grounding point D; fourth opening end E4; coupling gap G; matching circuit M. DETAILED DESCRIPTION

[0031] The technical solution of 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 provided in the present application, all other embodiments obtained by ordinary technicians in this field without creative work belong to the protection scope of the present application.

[0032] Reference to "embodiments" in this application means that a particular feature, structure, or characteristic described in conjunction with the embodiments 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.

[0033] 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. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions. For example: a component or device including one or more parts is not limited to the one or more parts listed, but optionally includes one or more parts that are not listed but inherent to the exemplified product, or one or more parts that it should have based on the described function.

[0034] See also Figure 1 , Figure 1 1 is a schematic diagram of the structure of an electronic device 1000 provided in an embodiment of the present application. The electronic device 1000 includes but is not limited to a mobile phone, a tablet computer, a laptop computer, a computer, a wearable device, a drone, a robot, a digital camera, and other devices with communication functions. The present embodiment of the application is described by taking a mobile phone as an example, and other electronic devices can refer to this embodiment.

[0035] See also Figure 2 , Figure 21 is a partial exploded schematic diagram of an electronic device 1000 provided in an embodiment of the present application. The working environment of the antenna assembly 100 is illustrated by taking the electronic device 1000 as a mobile phone as an example. The electronic device 1000 includes a display screen 200, a middle frame 300 and a back cover 400 arranged in sequence along the thickness direction. Among them, the middle frame 300 includes a middle plate 310 and a frame 320 surrounding the side of the middle plate 310. The frame 320 is a conductive frame, such as a metal frame. A receiving space is formed between the display screen 200 and the middle plate 310, and between the middle plate 310 and the back cover 400 to accommodate devices such as the main circuit board 600, the camera module, the receiver module, the battery 700, the sub-board 800 and various sensors. One side of the frame 320 along the thickness direction is surrounded by the edge of the display screen 200, and the other side of the frame 320 along the thickness direction is surrounded by the edge of the back cover 400 to form a complete appearance structure of the electronic device 1000. In this embodiment, the frame 320 and the middle plate 310 are an integral structure, and the frame 320 and the back cover 400 are separate structures. The above is the working environment of the antenna assembly 100 taking a mobile phone as an example, but the antenna assembly 100 of the present application is not limited to the above working environment.

[0036] See also Figure 3 , Figure 3 It is a partial back view of the electronic device 1000 provided in an embodiment of the present application without the back cover 400. The frame 320 includes a top frame 321, a bottom frame 324, and a first side frame 322 and a second side frame 323 connected to the top frame 321 and the bottom frame 324. Among them, the top frame 321 is the side away from the ground when the user holds the electronic device 1000 and uses the screen vertically, and the bottom frame 324 is the side facing the ground when the user holds the electronic device 1000 and uses the screen vertically. The first side frame 322 is the left side when the user holds the electronic device 1000 and uses the screen vertically. The second side frame 323 is the right side when the user holds the electronic device 1000 and uses the screen vertically. Of course, the first side frame 322 can also be the right side when the user holds the electronic device 1000. The second side frame 323 is the left side when the user holds the electronic device 1000.

[0037] The main circuit board 600 and the battery 700 are disposed in the area surrounded by the frame 320. The top frame 321, the main circuit board 600, the battery 700, the sub-board 800, and the bottom frame 324 are sequentially disposed along the length direction of the electronic device 1000.

[0038] Optionally, the top frame 321 is a straight frame, the first side frame 322 and the second side frame 323 are both straight frames in the middle, and the two ends are bent frames, wherein the bending angles of the bent frames at the two ends of the first side frame 322 are close to or 90°. The bending angles of the bent frames at the two ends of the second side frame 323 are close to or 90°. The bent frames are curved in an arc. The bottom frame 324 is a straight frame.

[0039] See also Figure 2 , the electronic device 1000 also includes a reference ground system 500. The reference ground system 500 is arranged in the frame 320. The shape of the reference ground system 500 is roughly rectangular. Because devices are set up in the mobile phone as needed or other structures are avoided, various grooves, holes, etc. are opened on the reference ground edge of the reference ground system 500. The reference ground system 500 includes but is not limited to the metal alloy part of the middle plate 310 and the reference ground metal part of the circuit board (including the main circuit board 600 and the sub-board 800). Roughly speaking, the reference ground system in the electronic device 1000 can be equivalent to a rough rectangle, so it is called the reference ground system 500. Among them, the reference ground system 500 does not indicate that the shape of the reference ground is plate-shaped and is a rectangular plate.

[0040] The specific structure of the antenna assembly 100 provided in the first embodiment is described below with reference to the accompanying drawings.

[0041] See also Figure 3 and Figure 4 The antenna assembly 100 includes a first radiator 10 , a second radiator 20 and a feed source 30 .

[0042] The present application does not specifically limit the material of the first radiator 10. Optionally, the material of the first radiator 10 is a conductive material, including but not limited to conductive materials such as metals and alloys. The present application does not specifically limit the shape of the first radiator 10. For example, the shape of the first radiator 10 includes but is not limited to a strip, a sheet, a rod, a coating, a film, etc. Figure 3 The first radiator 10 shown is only an example and does not limit the shape of the first radiator 10 provided in the present application. In the present embodiment, the first radiator 10 is in a strip shape. The present application does not limit the extension trajectory of the first radiator 10. Optionally, the first radiator 10 may extend along a straight line, or along a curve, or along a bending line. The first radiator 10 may be a line with uniform width on the extension trajectory, or may be a strip with unequal width such as a gradient width and a widened area.

[0043] The present application does not specifically limit the form of the first radiator 10. Optionally, the form of the first radiator 10 includes but is not limited to a metal frame 320, a metal frame embedded in a plastic frame 320, a metal radiator located in or on the frame 320, a flexible printed circuit board antenna formed on a flexible printed circuit board (FPC), a laser direct structured antenna by laser direct structure (LDS), a printed direct structured antenna by printing direct structure (PDS), a conductive sheet antenna (such as a metal bracket antenna), etc. In this embodiment, the first radiator 10 is taken as a part of the metal frame 320 of the electronic device 1000 as an example.

[0044] See also Figure 3 and Figure 4 , the first radiator 10 includes a first opening end E1, a feeding point A and a second opening end E2. Specifically, the first opening end E1 and the second opening end E2 are two ends of the first radiator 10. By setting two breaks on the frame 320, the first radiator 10 can be formed on the frame 320, and the positions of the first opening end E1 and the second opening end E2 of the first radiator 10 are defined.

[0045] The open end (including the first open end E1, the second open end E2, etc.) mentioned in the present application refers to an end that is disconnected from other conductive parts on the frame 320 through an insulating gap and is disconnected from the reference ground system 500. In order to ensure the structural strength of the frame 320 of the electronic device 1000, the insulating gap is filled with an insulating material.

[0046] Optionally, the feeding point A may be located at the first opening end E1. Optionally, the feeding point A is located in an area on the first radiator 10 close to the first opening end E1. The position of the feeding point A affects the resonance mode of the subsequent frequency band. In other embodiments, the feeding point A may also be located at the second opening end E2. The present application does not limit the specific position of the feeding point A, so as to ensure the formation of the subsequent resonance mode and improve the efficiency within the MHB band.

[0047] Optionally, the feeding point A may be a protrusion on the inner side of the frame 320 protruding toward the reference ground system 500 .

[0048] The material and shape of the second radiator 20 may refer to the description of the material and shape of the first radiator 10 .

[0049] See also Figure 3 and Figure 4The second radiator 20 includes a third opening end E3, a grounding point D and a fourth opening end E4. The third opening end E3 and the fourth opening end E4 are two ends of the second radiator 20 respectively.

[0050] Optionally, the grounding point D is located between the third opening end E3 and the fourth opening end E4.

[0051] The grounding point D described in the present application is electrically connected to the reference ground system 500, wherein the electrical connection method includes but is not limited to grounding the grounding point D through a grounding spring; or, the grounding point D and the reference ground system 500 are interconnected as one, that is, through a physical grounding method (that is, the frame 320 is partially bridged with the metal middle plate).

[0052] Among them, see Figure 3 and Figure 4 , a coupling gap G is formed between the third open end E3 and the second open end E2. Optionally, the first radiator 10 is a main radiation branch, and the second radiator 20 is a parasitic radiation branch.

[0053] As mentioned above, on the basis of opening two breaks on the frame 320 (for example, the first side frame 320), another break is opened on the frame 320 (for example, the first side frame 320) to form the first radiator 10 and the second radiator 20 arranged adjacently, wherein the break between the first radiator 10 and the second radiator 20 is a coupling gap G.

[0054] Optionally, the coupling gap G is an insulating gap, and the width of the coupling gap G is 0.5 to 2 mm, and further exemplified as 1 mm, but not limited to this size. The first radiator 10 and the second radiator 20 can generate capacitive coupling through the coupling gap G. Optionally, the first radiator 10 and the second radiator 20 can be regarded as two parts formed by the frame 320 being separated by the coupling gap G. Among them, "capacitive coupling" means that the coupling gap G between the first radiator 10 and the second radiator 20 generates an electric field, and the signal of the first radiator 10 can be transmitted to the second radiator 20 through the electric field, so that the first radiator 10 and the second radiator 20 can achieve electrical signal conduction even when they are not directly electrically connected.

[0055] In the present application, the first radiator 10 and the second radiator 20 are both located at any one of the top frame 321 , the first side frame 322 , the bottom frame 324 and the second side frame 323 .

[0056] For example, when the electronic device 1000 is a candy bar phone, the first radiator 10 and the second radiator 20 can both be disposed on the first side frame 322. For example, when the electronic device 1000 is a candy bar phone, the first radiator 10 and the second radiator 20 can both be disposed on the second side frame 323. For another example, when the electronic device 1000 is a long-axis folding phone, the first radiator 10 and the second radiator 20 can both be disposed on the first side frame 322. For another example, when the electronic device 1000 is a long-axis folding phone, the first radiator 10 and the second radiator 20 can be disposed on the second side frame 323. For another example, when the electronic device 1000 is a long-axis folding phone, the first radiator 10 and the second radiator 20 are respectively located at positions on both sides of the rotation axis on the top frame 321. For another example, when the electronic device 1000 is a long-axis folding phone, the first radiator 10 and the second radiator 20 are respectively located at positions on both sides of the rotation axis on the bottom frame 324. For another example, when the electronic device 1000 is a tablet computer, the first radiator 10 and the second radiator 20 are both located on the top frame 321. For another example, when the electronic device 1000 is a tablet computer, the first radiator 10 and the second radiator 20 are both located on the first side frame 322. For another example, when the electronic device 1000 is a tablet computer, the first radiator 10 and the second radiator 20 are both located on the bottom frame 324. For another example, when the electronic device 1000 is a tablet computer, the first radiator 10 and the second radiator 20 are both located on the second side frame 323.

[0057] In this embodiment, an example is given in which the first radiator 10 and the second radiator 20 are disposed on the first side frame 322 .

[0058] When the first radiator 10 is disposed on the first side frame 322 , the first opening end E1 is adjacent to the main circuit board, the second opening end E2 is adjacent to the battery, and the second radiator 20 is located on the first side frame 322 adjacent to the battery.

[0059] Specifically, the projection of the first opening end E1 in the width direction of the electronic device 1000 is located on the main circuit board close to the battery. The projection of the second opening end E2 in the width direction of the electronic device 1000 is located on the battery close to the main circuit board.

[0060] Further optionally, the distance between the first opening end E1 and the top frame 321 is greater than or equal to the second distance. The second distance is 10 mm, for example. In this embodiment, although the first opening end E1 is closer to the top frame 321 relative to the second opening end E2, there is a certain distance between the first opening end E1 and the top frame 321, so that when the electronic device 1000 is held in both hands in horizontal mode, the fingertips of the operator will not cover the gap next to the first opening end E1, thereby avoiding the electronic device 1000 being held in both hands in horizontal mode and affecting the working efficiency of the antenna assembly 100.

[0061] The feed source 30 includes but is not limited to a radio frequency transceiver chip and the like.

[0062] See also Figure 3 and Figure 4 , the feed source 30 is electrically connected to the feeding point A.

[0063] The electrical connection described in the present application includes direct electrical connection between two structures, or indirect electrical connection through other elements. In this embodiment, the feed source 30 is indirectly electrically connected to the feeding point A through a radio frequency transmission line, a feeding spring, and the like.

[0064] The feed source 30 is used to excite the first radiator 10 and the second radiator 20 to form at least a first resonance mode supporting a first frequency band.

[0065] Specifically, the feed source 30 can at least provide a radio frequency excitation signal in a first frequency band.

[0066] The application does not specifically limit the size of the first frequency band. Optionally, the first frequency band includes but is not limited to at least one of the LB frequency band (less than 1 GHz), the MHB frequency band (1.7-2.7 GHz), the UHB frequency band (greater than 3 GHz), the Wi-Fi frequency band, the GPS frequency band, etc. For example, the first frequency band is the MHB frequency band.

[0067] Optional, see Figure 5 and Figure 6, the distance between the feeding point A and the first open end E1 is less than or equal to 1 / 8 wavelength of the resonant frequency of the first frequency band, so that the feeding point A is close to the first open end E1, so that the feed source 30 excites the first radiator 10 to form a first sub-current Q1 (for example, 1 / 2 wavelength current mode) supporting the first frequency band, and the second radiator 20 also forms a second sub-current Q2 (for example, 1 / 2 wavelength current mode) supporting the first frequency band under the coupling effect of the first radiator 10, and the second radiator 20 and the first radiator 10 form a current in the same direction, so as to improve the radiation aperture of the first frequency band, thereby improving the system efficiency of the first frequency band. When the first frequency band is the B41 or Wi-Fi 2.4G frequency band, the system efficiency of the B41 or Wi-Fi 2.4G frequency band is improved.

[0068] See also Figure 5 The resonant current of the first resonant mode includes a first sub-current Q1 on the first radiator 10 and a second sub-current Q2 on the second radiator 20 .

[0069] The resonant current of the first resonant mode refers to a relatively strong current distribution formed on the first radiator 10 and the second radiator 20 under the excitation of the feed source 30. The first sub-current Q1 is distributed between the first opening end E1 and the second opening end E2 of the first radiator 10. The second sub-current Q2 is distributed between the third opening end E3 and the fourth opening end E4 of the second radiator 20.

[0070] Furthermore, the direction of the first sub-current Q1 is the same as the direction of the second sub-current Q2, so that when the antenna assembly 100 operates in the first frequency band, a resonant current in the same direction is formed on the first radiator 10 and the second radiator 20. The radiation aperture of the antenna assembly 100 when operating in the first frequency band is the sum of the physical sizes of the first radiator 10 and the second radiator 20, so that the radiation aperture of the antenna assembly 100 when operating in the first frequency band is larger, and thus the antenna assembly 100 has a higher working efficiency in the first frequency band.

[0071] The present application does not specifically limit the current direction of the first sub-current Q1 and the current direction of the second sub-current Q2. In one phase, the current direction of the first sub-current Q1 is from the second opening end E2 to the first opening end E1, and the current direction of the second sub-current Q2 is from the fourth opening end E4 to the third opening end E3. That is, as shown in the figure, both the first sub-current Q1 and the second sub-current Q2 are to the right.

[0072] In another phase, the first sub-current Q1 flows from the first opening end E1 to the second opening end E2, and the second sub-current Q2 flows from the third opening end E3 to the fourth opening end E4. That is, as shown in the figure, both the first sub-current Q1 and the second sub-current Q2 flow to the left.

[0073] The present application provides an antenna assembly 100, which includes a first radiator 10, a second radiator 20 and a feed source 30. The first radiator 10 includes a first open end E1, a feeding point A, and a second open end E2; the second radiator 20 includes a third open end E3, a grounding point D, and a fourth open end E4, and a coupling gap G is formed between the second open end E2 and the third open end E3; the feed source 30 is electrically connected to the feeding point A, and the feed source 30 is used to excite the first radiator 10 and the second radiator 20 to form at least a first resonance mode supporting a first frequency band, and the feeding point A is connected to the first open end. The distance between E1 is less than or equal to 1 / 8 wavelength of the resonant frequency of the first frequency band, and the resonant current of the first resonant mode includes a first sub-current Q1 on the first radiator 10 and a second sub-current Q2 on the second radiator 20, and the direction of the first sub-current Q1 is the same as the direction of the second sub-current Q2. In this way, when the antenna component 100 operates in the first frequency band, a resonant current can be formed on the first radiator 10 and a resonant current can be formed on the second radiator 20. The radiation aperture of the antenna component 100 when operating in the first frequency band is increased, thereby improving the efficiency of the antenna component 100 when operating in the first frequency band.

[0074] Optionally, the current intensity distribution of the first sub-current Q1 on the first radiator 10 includes first increasing and then decreasing.

[0075] For details, please refer to Figure 6 According to the current simulation diagram of the first resonant mode, it can be seen that in one phase, the current direction of the first sub-current Q1 is from the second open end E2 to the first open end E1. The first open end E1 of the first radiator 10 has relatively more dark blue arrows, the arrow color in the middle position of the first radiator 10 is light blue, and the second open end E2 of the first radiator 10 has some dark blue arrows. Among them, the current intensity of the dark blue arrow is less than the current intensity of the light blue arrow. Therefore, it can be seen that when the feed source 30 excites the first radiator 10 and the second radiator 20 to form the first resonant mode supporting the first frequency band, the intensity distribution of the first sub-current Q1 on the first radiator 10 increases first and then decreases. Furthermore, the intensity distribution of the first sub-current Q1 on the first radiator 10 is weak at both ends and strong in the middle.

[0076] Further optionally, the first sub-current Q1 includes a 1 / 2 wavelength current distribution supporting the first frequency band.

[0077] Specifically, the electrical length of the first radiator 10 is close to 1 / 2 wavelength of the resonant frequency of the first frequency band, so that the feed source 30 excites the first radiator 10 to form a 1 / 2 wavelength current mode supporting the first frequency band, and the antenna assembly 100 has good efficiency when operating in the first frequency band.

[0078] Further optionally, the current intensity distribution of the second sub-current Q2 on the second radiator 20 includes first increasing and then decreasing.

[0079] For details, please refer to Figure 6 According to the current simulation diagram of the first resonant mode, it can be seen that in one phase, the current direction of the second sub-current Q2 is from the fourth open end E4 to the third open end E3. The third open end E3 of the second radiator 20 has a dark blue arrow, the arrow color in the middle position of the second radiator 20 is light blue, and the fourth open end E4 of the second radiator 20 has some dark blue arrows. Among them, the current intensity of the dark blue arrow is less than the current intensity of the light blue arrow. Therefore, it can be seen that when the feed source 30 excites the first radiator 10 and the second radiator 20 to form a first resonant mode supporting the first frequency band, the intensity distribution of the second sub-current Q2 on the second radiator 20 increases first and then decreases. Furthermore, the intensity distribution of the second sub-current Q2 on the second radiator 20 is weak at both ends and strong in the middle.

[0080] Further optionally, the second sub-current Q2 includes a 1 / 2 wavelength current distribution supporting the first frequency band.

[0081] Specifically, the electrical length of the second radiator 20 is close to 1 / 2 wavelength of the resonant frequency of the first frequency band, so that the feed source 30 excites the second radiator 20 to form a 1 / 2 wavelength current mode supporting the first frequency band, and the antenna assembly 100 has good efficiency when operating in the first frequency band.

[0082] The present application does not specifically limit the antenna form of the first radiator 10 .

[0083] For further optional information, see Figure 5 , the feeding point A is located at the first open end E1. In this way, the first open end E1 is a position with a strong electric field (the position with a strong electric field has a weak current), and the electrical length of the first radiator 10 is close to 1 / 2 wavelength of the first frequency band, so as to form a weak-strong-weak current intensity distribution between the second open end E2 and the first open end E1 of the first radiator 10, thereby forming a 1 / 2 wavelength mode supporting the first frequency band on the first radiator 10. Under the coupling effect of the first radiator 10, the second radiator 20 also forms a 1 / 2 wavelength mode supporting the first frequency band, and the second radiator 20 and the first radiator 10 form a current in the same direction, so as to improve the radiation aperture of the first frequency band, thereby improving the system efficiency of the first frequency band.

[0084] Optional, see Figure 3 and Figure 4 The antenna assembly 100 includes a matching circuit M. The matching circuit M is electrically connected between the feed source 30 and the feeding point A. The matching circuit M includes at least one of a capacitor and an inductor. The matching circuit M adjusts the impedance matching between the feed source 30 port (the aforementioned feeding port) and the first radiator 10 port, so as to facilitate the feed source 30 to excite the first resonant mode on the first radiator 10.

[0085] Optionally, the feed source 30 is further used to excite the first radiator 10 and the second radiator 20 to form at least a second resonance mode supporting a second frequency band.

[0086] Specifically, the feed source 30 can at least provide a radio frequency excitation signal in the second frequency band.

[0087] The application does not specifically limit the size of the second frequency band. Optionally, the second frequency band includes but is not limited to at least one of the LB frequency band (less than 1 GHz), the MHB frequency band (1.7-2.7 GHz), the UHB frequency band (greater than 3 GHz), the Wi-Fi frequency band, the GPS frequency band, etc. For example, the second frequency band is the MHB frequency band.

[0088] See also Figure 7 and Figure 8 The resonant current of the second resonant mode includes a third sub-current Q3 on the first radiator 10 and a fourth sub-current Q4 on the second radiator 20 .

[0089] The direction of the third sub-current Q3 is opposite to the direction of the fourth sub-current Q4.

[0090] The resonant current of the second resonant mode refers to a relatively strong current distribution formed on the first radiator 10 and the second radiator 20 under the excitation of the feed source 30. The third sub-current Q3 is distributed between the first opening end E1 and the second opening end E2 of the first radiator 10. The fourth sub-current Q4 is distributed between the third opening end E3 and the fourth opening end E4 of the second radiator 20.

[0091] Furthermore, the direction of the third sub-current Q3 is opposite to the direction of the fourth sub-current Q4 . Thus, when the antenna assembly 100 operates in the second frequency band, opposite resonant currents are formed on the first radiator 10 and the second radiator 20 .

[0092] The present application does not specifically limit the current direction of the third sub-current Q3 and the current direction of the fourth sub-current Q4. In one phase, the current direction of the third sub-current Q3 is from the first opening end E1 to the second opening end E2, and the current direction of the fourth sub-current Q4 is from the fourth opening end E4 to the third opening end E3. That is, as shown in the figure, the third sub-current Q3 flows to the left and the fourth sub-current Q4 flows to the right.

[0093] In another phase, the third sub-current Q3 flows from the second opening end E2 to the first opening end E1, and the fourth sub-current Q4 flows from the third opening end E3 to the fourth opening end E4. That is, as shown in the figure, the third sub-current Q3 flows to the right and the fourth sub-current Q4 flows to the left.

[0094] In the antenna assembly 100 provided in this embodiment, the feed source 30 can not only excite the first radiator 10 and the second radiator 20 to support the first resonance mode of the first frequency band, but also excite the first radiator 10 and the second radiator 20 to support the second resonance mode of the second frequency band. In this way, the antenna assembly 100 can support more frequency bands while occupying less space.

[0095] Optionally, the current intensity distribution of the third sub-current Q3 on the first radiator 10 includes first increasing and then decreasing.

[0096] For details, please refer to Figure 8 According to the current simulation diagram of the second resonant mode, it can be seen that in one phase, the current direction of the third sub-current Q3 flows from the first open end E1 to the second open end E2. The first open end E1 of the first radiator 10 has relatively more dark blue arrows, the arrow color in the middle position of the first radiator 10 is light blue, and the second open end E2 of the first radiator 10 has some dark blue arrows. Among them, the current intensity of the dark blue arrow is less than the current intensity of the light blue arrow. Therefore, it can be seen that when the feed source 30 excites the first radiator 10 and the second radiator 20 to form a second resonant mode supporting the second frequency band, the intensity distribution of the third sub-current Q3 on the first radiator 10 increases first and then decreases. Furthermore, the intensity distribution of the third sub-current Q3 on the first radiator 10 is weak at both ends and strong in the middle.

[0097] Further optionally, the third sub-current Q3 includes a 1 / 2 wavelength current distribution supporting the second frequency band.

[0098] Optionally, the resonant frequency of the second frequency band is greater than the resonant frequency of the first frequency band. The difference between the resonant frequency of the second frequency band and the resonant frequency of the first frequency band is less than the first preset frequency band difference. The first preset frequency band difference is small, so that the resonant frequency of the second frequency band is close to the resonant frequency of the first frequency band. The present application does not make specific limitations on the first preset frequency band difference. For example, the first preset frequency band difference is 300MHz, but is not limited to this data. The resonant frequency of the second frequency band is close to the resonant frequency of the first frequency band, so that the first frequency band and the second frequency band form a continuous frequency band. And the continuous frequency band has a good S11 parameter, for example, the return loss of the continuous frequency band formed by the first frequency band and the second frequency band is less than -4dB. This embodiment forms a second resonant mode at a position close to the high-frequency side of the first frequency band, which not only enables the first frequency band to have a better S parameter, but also improves the system efficiency of the first resonant mode.

[0099] Optional, see Fig. 9 The first frequency band covers the B41 frequency band, or covers the N41 frequency band, or covers the B40 frequency band, or covers the Wi-Fi 2.4G frequency band. Among them, the B41 frequency band is 2496-2690MHz.

[0100] The resonant frequency of the first frequency band is close to the center frequency of the frequency band that the first frequency band needs to cover (for example, the B41 frequency band). For example, the frequency band that the first frequency band needs to cover is the B41 frequency band. The resonant frequency of the first frequency band is 2.5 GHz.

[0101] See also Fig. 9 , the difference between the resonant frequency of the second frequency band and the maximum frequency of the frequency band required to be covered by the first frequency band (eg, B41 frequency band) is close to or equal to 100 MHz. Thus, it can be determined that the resonant frequency of the second frequency band is close to 2.8 GHz.

[0102] Specifically, as mentioned above, the electrical length of the first radiator 10 is close to 1 / 2 wavelength of the resonant frequency of the first frequency band, and the resonant frequency of the first frequency band is close to the resonant frequency of the second frequency band. For example, the difference between the resonant frequency of the first frequency band and the resonant frequency of the second frequency band is 300 MHz. Therefore, the electrical length of the first radiator 10 is close to 1 / 2 wavelength of the resonant frequency of the second frequency band, so that the feed source 30 can excite the first radiator 10 to form a 1 / 2 wavelength current mode supporting the second frequency band, and the antenna assembly 100 also has good efficiency when operating in the second frequency band.

[0103] Further optionally, the current intensity distribution of the fourth sub-current Q4 on the second radiator 20 includes first increasing and then decreasing.

[0104] For details, please refer to Figure 8According to the current simulation diagram of the second resonant mode, it can be seen that in one phase, the current direction of the fourth sub-current Q4 is from the fourth open end E4 to the third open end E3. The third open end E3 of the second radiator 20 has a dark blue arrow, the middle position of the second radiator 20 has some light blue arrows, green arrows, yellow arrows, red arrows, etc., and the fourth open end E4 of the second radiator 20 has some dark blue arrows. Among them, the current intensity of the light blue arrow, the green arrow, the yellow arrow, and the red arrow are all greater than the current intensity of the dark blue arrow. Therefore, it can be seen that when the feed source 30 excites the first radiator 10 and the second radiator 20 to form a second resonant mode supporting the second frequency band, the intensity distribution of the fourth sub-current Q4 on the second radiator 20 increases first and then decreases. Further, the intensity distribution of the fourth sub-current Q4 on the second radiator 20 is weak at both ends and strong in the middle.

[0105] Further optionally, the fourth sub-current Q4 includes a 1 / 2 wavelength current distribution supporting the second frequency band.

[0106] Specifically, as mentioned above, the electrical length of the second radiator 20 is close to 1 / 2 wavelength of the resonant frequency of the first frequency band, and the resonant frequency of the first frequency band is close to the resonant frequency of the second frequency band. For example, the difference between the resonant frequency of the first frequency band and the resonant frequency of the second frequency band is 300 MHz. Therefore, the electrical length of the second radiator 20 is close to 1 / 2 wavelength of the resonant frequency of the second frequency band, so that the feed source 30 can excite the second radiator 20 to form a 1 / 2 wavelength current mode supporting the second frequency band, and the antenna assembly 100 has better efficiency when operating in the second frequency band.

[0107] Optional, see Fig.10 and Fig.11 The feed source 30 is also used to excite the first radiator 10 and the second radiator 20 to form at least a third resonance mode supporting a third frequency band. The resonance current of the third resonance mode includes a fifth sub-current Q5 on the first radiator 10 and a sixth sub-current Q6 between the ground point D and the third open end E3. The direction of the fifth sub-current Q5 is the same as that of the sixth sub-current Q6.

[0108] Specifically, the feed source 30 can at least provide a radio frequency excitation signal in the third frequency band.

[0109] The present application does not specifically limit the size of the third frequency band. Optionally, the third frequency band includes but is not limited to at least one of the LB frequency band (less than 1 GHz), the MHB frequency band (1.7-2.7 GHz), the UHB frequency band (greater than 3 GHz), the Wi-Fi frequency band, the GPS frequency band, etc. For example, the third frequency band is the MHB frequency band.

[0110] The resonant current of the third resonant mode includes a fifth sub-current Q5 on the first radiator 10 and a sixth sub-current Q6 on the second radiator 20 .

[0111] The direction of the fifth sub-current Q5 is the same as the direction of the sixth sub-current Q6.

[0112] The resonant current of the third resonant mode refers to a relatively strong current distribution formed on the first radiator 10 and the second radiator 20 under the excitation of the feed source 30. The fifth sub-current Q5 is distributed between the first opening end E1 and the second opening end E2 of the first radiator 10. The sixth sub-current Q6 is distributed between the third opening end E3 of the second radiator 20 and the ground point D.

[0113] Furthermore, the direction of the fifth sub-current Q5 is the same as the direction of the sixth sub-current Q6 . Thus, when the antenna assembly 100 operates in the third frequency band, resonant currents in the same direction are formed on the first radiator 10 and the second radiator 20 .

[0114] The present application does not specifically limit the current direction of the fifth sub-current Q5 and the current direction of the sixth sub-current Q6. In one phase, the current direction of the fifth sub-current Q5 is from the second opening end E2 to the first opening end E1, and the current direction of the sixth sub-current Q6 is from the ground point D to the third opening end E3. That is, as shown in the figure, the fifth sub-current Q5 is to the right and the sixth sub-current Q6 is to the right.

[0115] In another phase, the fifth sub-current Q5 flows from the first opening end E1 to the second opening end E2, and the sixth sub-current Q6 flows from the third opening end E3 to the grounding point D. That is, the fifth sub-current Q5 flows to the left and the sixth sub-current Q6 flows to the right.

[0116] In the antenna assembly 100 provided in this embodiment, the feed source 30 can not only excite the first radiator 10 and the second radiator 20 to support the first resonance mode of the first frequency band, but also excite the first radiator 10 and the second radiator 20 to support the second resonance mode of the second frequency band, and can also excite the first radiator 10 and the second radiator 20 to support the third resonance mode of the third frequency band. In this way, the antenna assembly 100 can support more frequency bands while occupying less space.

[0117] Optional, see Fig.11 The current intensity distribution of the fifth sub-current Q5 on the first radiator 10 includes a gradual increase from the second opening end E2 to the feeding point A.

[0118] For details, please refer to Fig.11According to the current simulation diagram of the third resonant mode, it can be seen that in one phase, the current direction of the fifth sub-current Q5 is from the second open end E2 to the first open end E1. The arrows of the feeding point A of the first radiator 10 are mainly green arrows, red arrows, and yellow arrows, and there are some light blue arrows at the second open end E2 of the first radiator 10. Among them, the current intensity of the green arrow, the red arrow, and the yellow arrow is greater than the current intensity of the light blue arrow. Therefore, it can be seen that when the feed source 30 excites the first radiator 10 and the second radiator 20 to form a third resonant mode supporting the third frequency band, the intensity distribution of the fifth sub-current Q5 on the first radiator 10 is gradually enhanced from the second open end E2 to the feeding point A.

[0119] Further optionally, the current intensity distribution of the sixth sub-current Q6 on the second radiator 20 includes gradually increasing from the grounding point D to the third open end E3.

[0120] For details, please refer to Fig.11 According to the current simulation diagram of the third resonant mode, it can be seen that in one phase, the current direction of the sixth sub-current Q6 flows from the grounding point D to the third open end E3. The third open end E3 of the second radiator 20 has a light blue arrow, and the grounding point D of the second radiator 20 has some dark blue arrows. Among them, the current intensity of the light blue arrows is greater than the current intensity of the dark blue arrows. Therefore, it can be seen that when the feed source 30 excites the first radiator 10 and the second radiator 20 to form a third resonant mode supporting the third frequency band, the intensity distribution of the sixth sub-current Q6 on the second radiator 20 includes a gradual increase from the grounding point D to the third open end E3.

[0121] Optionally, the resonant frequency of the third frequency band is smaller than the resonant frequency of the first frequency band.

[0122] Optional, see Fig.12 The third frequency band is used to cover the B3 frequency band, which is 1710-1880MHz.

[0123] Optional, see Fig.12 The difference between the resonant frequency of the third frequency band and the resonant frequency of the B3 frequency band is less than the second preset frequency band difference. The second preset frequency band difference is small, so that the third frequency band can cover the B3 frequency band, and the antenna assembly 100 can support the B3 frequency band.

[0124] The resonant frequency of the third frequency band is close to the center frequency of the frequency band that the third frequency band needs to cover (for example, the B3 frequency band). For example, the frequency band that the third frequency band needs to cover is the B3 frequency band. The resonant frequency of the third frequency band is 1.8 GHz.

[0125] Optional, see Fig.12The first frequency band covers the B41 frequency band, or covers the N41 frequency band, or covers the B40 frequency band, or covers the Wi-Fi 2.4G frequency band. Among them, the B41 frequency band is 2496-2690MHz.

[0126] The difference between the resonant frequency of the first frequency band and the resonant frequency of the B41 frequency band or the Wi-Fi 2.4G frequency band is less than the third preset frequency band difference. In other words, the resonant frequency of the first frequency band is close to the center frequency of the frequency band that the first frequency band needs to cover (for example, the B41 frequency band). For example, the frequency band that the first frequency band needs to cover is the B41 frequency band. The resonant frequency of the first frequency band is 2.5 GHz.

[0127] Optional, see Fig.13 and Fig.14 The feed source 30 is also used to excite the second radiator 20 to form at least a fourth resonance mode supporting a fourth frequency band. The resonance current of the fourth resonance mode includes an eighth sub-current Q8 between the fourth open end E4 and the ground point D and a seventh sub-current Q7 between the ground point D and the third open end E3. The direction of the seventh sub-current Q7 is opposite to that of the eighth sub-current Q8.

[0128] Specifically, the feed source 30 can at least provide a radio frequency excitation signal in the fourth frequency band.

[0129] The present application does not specifically limit the size of the fourth frequency band. Optionally, the fourth frequency band includes but is not limited to at least one of the LB frequency band (less than 1 GHz), the MHB frequency band (1.7-2.7 GHz), the UHB frequency band (greater than 3 GHz), the Wi-Fi frequency band, the GPS frequency band, etc. For example, the fourth frequency band is the MHB frequency band.

[0130] The resonant current of the fourth resonant mode includes a seventh sub-current Q7 and an eighth sub-current Q8 on the second radiator 20 .

[0131] The direction of the seventh sub-current Q7 is opposite to the direction of the eighth sub-current Q8.

[0132] The resonant current of the fourth resonant mode refers to a relatively strong current distribution formed on the second radiator 20 under the excitation of the feed source 30. The seventh sub-current Q7 is distributed between the third open end E3 of the second radiator 20 and the ground point D. The eighth sub-current Q8 is distributed between the ground point D of the second radiator 20 and the fourth open end E4.

[0133] Furthermore, the direction of the seventh sub-current Q7 is opposite to the direction of the eighth sub-current Q8 , so that when the antenna assembly 100 operates in the fourth frequency band, a reverse resonant current is formed on the second radiator 20 .

[0134] The present application does not specifically limit the current direction of the seventh sub-current Q7 and the current direction of the eighth sub-current Q8. In one phase, the current direction of the seventh sub-current Q7 is from the ground point D to the third open end E3, and the current direction of the eighth sub-current Q8 is from the ground point D to the fourth open end E4. That is, as shown in the figure, the seventh sub-current Q7 flows to the right and the eighth sub-current Q8 flows to the left.

[0135] In another phase, the seventh sub-current Q7 flows from the third opening end E3 to the grounding point D, and the eighth sub-current Q8 flows from the fourth opening end E4 to the grounding point D. That is, the seventh sub-current Q7 flows to the left and the eighth sub-current Q8 flows to the right.

[0136] Optional, see Fig.14 The current intensity distribution of the seventh sub-current Q7 on the first radiator 10 includes gradually weakening from the ground point D to the third open end E3.

[0137] For details, please refer to Fig.14 According to the current simulation diagram of the fourth resonant mode, it can be seen that in one phase, the current direction of the seventh sub-current Q7 is from the grounding point D to the third open end E3. The third open end E3 of the second radiator 20 has relatively more dark blue arrows, and the arrow color in the middle position of the first radiator 10 is light blue. Among them, the current intensity of the dark blue arrow is less than the current intensity of the light blue arrow. Therefore, it can be seen that when the feed source 30 excites the second radiator 20 to form the fourth resonant mode supporting the fourth frequency band, the intensity distribution of the seventh sub-current Q7 on the second radiator 20 is gradually decreasing from the grounding point D to the third open end E3.

[0138] Further optionally, the seventh sub-current Q7 includes a 1 / 4 wavelength current distribution supporting the fourth frequency band.

[0139] Specifically, as mentioned above, the electrical length from the grounding point D of the second radiator 20 to the third opening end E3 is close to 1 / 4 wavelength of the resonant frequency of the fourth frequency band, so that the feed source 30 excites the grounding point D of the second radiator 20 to the third opening end E3 to form a 1 / 4 wavelength current mode supporting the fourth frequency band.

[0140] Further optionally, the current intensity distribution of the eighth sub-current Q8 from the ground point D to the fourth open end E4 of the second radiator 20 includes gradually weakening from the ground point D to the fourth open end E4.

[0141] For details, please refer to Fig.14According to the current simulation diagram of the fourth resonant mode, it can be seen that in one phase, the current direction of the eighth sub-current Q8 flows from the grounding point D to the fourth open end E4. The fourth open end E4 of the second radiator 20 has a dark blue arrow, and the grounding point D of the second radiator 20 has some light blue arrows. Among them, the current intensity of the light blue arrows is greater than the current intensity of the dark blue arrows. Therefore, it can be seen that when the feed source 30 excites the second radiator 20 to form a fourth resonant mode supporting the fourth frequency band, the intensity distribution of the eighth sub-current Q8 on the second radiator 20 is gradually weakened from the grounding point D to the fourth open end E4.

[0142] Further optionally, the eighth sub-current Q8 includes a 1 / 4 wavelength current distribution supporting the fourth frequency band.

[0143] Specifically, as mentioned above, the electrical length from the grounding point D to the fourth opening end E4 of the second radiator 20 is close to 1 / 4 wavelength of the resonant frequency of the fourth frequency band, so that the feed source 30 excites the grounding point D to the fourth opening end E4 of the second radiator 20 to form a 1 / 4 wavelength current mode supporting the fourth frequency band, and the antenna assembly 100 has better efficiency when operating in the fourth frequency band.

[0144] Optional, see Fig.15 The resonant frequency of the fourth frequency band is less than the resonant frequency of the first frequency band, and the resonant frequency of the fourth frequency band is greater than the resonant frequency of the third frequency band. The resonant frequency of the third frequency band, the resonant frequency of the fourth frequency band, the resonant frequency of the first frequency band, and the resonant frequency of the second frequency band are similar.

[0145] In the antenna assembly 100 provided in this embodiment, the feed source 30 can excite the first radiator 10 and the second radiator 20 to support the first resonant mode of the first frequency band, the second resonant mode of the second frequency band, the third resonant mode of the third frequency band, and the fourth resonant mode of the fourth frequency band. In this way, the antenna assembly 100 can support more frequency bands while occupying less space.

[0146] Optionally, the difference between the resonant frequency of the fourth frequency band and the resonant frequency of the B1 frequency band is less than the fourth preset frequency band difference. In other words, the resonant frequency of the fourth frequency band is close to the center frequency of the frequency band that the fourth frequency band needs to cover (for example, the B1 frequency band). For example, the frequency band that the fourth frequency band needs to cover is the B1 frequency band. The resonant frequency of the fourth frequency band is 2.15 GHz.

[0147] Optionally, the fourth frequency band covers the B1 frequency band, wherein the B1 frequency band is 1920-2170 MHz.

[0148] Optionally, the third frequency band is used to cover the B3 frequency band, wherein the B3 frequency band is 1710-1880 MHz.

[0149] Optionally, the first frequency band covers the B41 frequency band, or covers the N41 frequency band, or covers the B40 frequency band, or covers the Wi-Fi 2.4G frequency band, wherein the B41 frequency band is 2496-2690 MHz.

[0150] Optionally, the resonant frequency of the second frequency band is higher than the maximum frequency of the MHB frequency band by about 100 MHz.

[0151] The third frequency band, the fourth frequency band, the first frequency band and the second frequency band form a continuous frequency band. The continuous frequency band covers 1.7 to 2.7 GHz (MHB frequency band). The antenna assembly 100 provided in the present application designs its antenna structure, the electrical length of the first radiator 10 and the second radiator 20, the position of the feeding point A, and the position of the grounding point D, so as to form a first resonance mode supporting the first frequency band, a second resonance mode supporting the second frequency band, a third resonance mode supporting the third frequency band, and a fourth resonance mode supporting the fourth frequency band on the first radiator 10 and the second radiator 20. The resonance frequencies of the first resonance mode, the second resonance mode, the third resonance mode, and the fourth resonance mode are designed so that the resonance frequency of the third resonance mode is close to the center frequency of the B3 frequency band, the resonance frequency of the fourth resonance mode is close to the center frequency of the B1 frequency band, the resonance frequency of the first resonance mode is close to the center frequency of the B41 frequency band, and the resonance frequency of the second resonance mode is higher than the maximum frequency of the MHB frequency band by about 100 MHz, so as to have better S parameters in the 1.7-2.7 GHz (MHB frequency band) band, for example, the return loss in the 1.7-2.7 GHz (MHB frequency band) band is less than -4 dB. In addition, it also has good system efficiency in the 1.7-2.7 GHz (MHB band) band.

[0152] In this embodiment, the distance between the ground point D and the center position of the second radiator 20 is less than or equal to the first preset distance. In other words, the ground point D is close to the center position of the second radiator 20, so that the resonant frequency of the second resonant mode, the resonant frequency of the third resonant mode, and the resonant frequency of the fourth resonant mode are located at appropriate positions within the MHB full frequency band, so as to cover the MHB full frequency band, have good S parameters within the MHB full frequency band, and have high system efficiency.

[0153] For example, when the grounding point D moves toward the side where the first radiator 10 is located, for the first resonance mode, since this position of the grounding point D is equivalent to a short circuit, the resonance frequency of the first resonance mode is basically unaffected; for the second resonance mode, since there is a main resonance current between the grounding point D and the third opening end E3, the grounding point D moves toward the side where the first radiator 10 is located, which is equivalent to reducing the length of the main resonance current, and the resonance frequency of the second resonance mode moves toward the high-frequency side; for the third resonance mode, there is a main resonance current between the grounding point D and the first opening end E1, and the grounding point D moves toward the side where the first radiator 10 is located, which is equivalent to reducing the length of the main resonance current, and the resonance frequency of the third resonance mode moves toward the high-frequency side; for the fourth resonance mode, since there is a main resonance current between the grounding point D and the third opening end E3, the grounding point D moves toward the side where the first radiator 10 is located, which is equivalent to reducing the length of the main resonance current, and the resonance frequency of the fourth resonance mode moves toward the high-frequency side. When the resonant frequency of the third resonant mode and the resonant frequency of the fourth resonant mode both move toward the high frequency side, it may result in the inability to effectively support the B3 band and the B1 band. The resonant frequency of the first resonant mode moves toward the high frequency side, which may result in the inability to effectively make the B41 band have better S parameters and the inability to effectively improve the system efficiency of the B41 band.

[0154] The embodiment of the present application provides an electronic device 1000, which includes a frame 320 and a reference ground system 500. The frame 320 is made of a conductive material, such as a metal material. The frame 320 includes a first radiator 10 and a second radiator 20, and a coupling gap G is formed between the first radiator 10 and the second radiator 20. One end of the first radiator 10 away from the coupling gap G is electrically connected to the matching circuit M and the feed source 30. The feeding point A is located near the open end of the first radiator 10, and the second radiator 20 is electrically connected to the reference ground system 500 through the grounding point D. The grounding point D is located in the middle area of ​​the second radiator 20.

[0155] See also Fig.15 , Fig.15It is an S parameter curve of the antenna assembly 100 provided in an embodiment of the present application. The feed source 30 excites the first radiator 10 and the second radiator 20 to excite four resonant modes. According to the resonant frequency, they are the third resonant mode, the fourth resonant mode, the first resonant mode and the second resonant mode from low to high. In the third resonant mode (the resonant frequency is 1.8 GHz, mainly covering the B3 frequency band), the current is concentrated between the feed point A and the grounding point D, showing a unidirectional distribution, increasing the radiation aperture and improving the radiation efficiency. In the fourth resonant mode (the resonant frequency is 2.15 GHz, mainly covering the B1 frequency band), the current is concentrated in the second radiator 20, and the currents on both sides of the grounding point D are reversed. In the first resonant mode (the resonant frequency is 2.5 GHz, mainly covering the B41 or Wi-Fi 2.4G frequency band), the current is in the same direction in the first radiator 10 and the second radiator 20. In the second resonant mode (the resonant frequency is 2.8 GHz), the current is reversed on the first radiator 10 and the second radiator 20.

[0156] See also Fig.15 , wherein the resonant frequencies of the third resonant mode, the fourth resonant mode, the first resonant mode, and the second resonant mode increase in sequence. The frequency bands supported by the third resonant mode, the fourth resonant mode, the first resonant mode, and the second resonant mode form a continuous frequency band, and the return loss of the continuous frequency band is less than or equal to -4dB. In this way, the present application forms a broadband antenna with full coverage of the MHB frequency band through fewer antenna branches.

[0157] See also Fig.16 , Fig.16 1 is a schematic diagram of an electronic device 1000 provided by an embodiment of the present application in a horizontal two-handed holding scenario. The feeding point A on the first radiator 10 and the coupling gap G between the first radiator 10 and the second radiator 20 are both located outside the handheld area to avoid the performance of the antenna assembly 100 being affected by the horizontal two-handed holding.

[0158] See also Fig.17 , Fig.17 It is the S parameter curve of the electronic device 1000 provided in the embodiment of the present application in free space and in the horizontal screen two-handed holding scenario. Among them, curve a (red) is the S parameter curve of the electronic device 1000 in free space. Curve b (green) is the S parameter curve of the electronic device 1000 in the horizontal screen two-handed holding scenario. It can be seen that in the horizontal screen two-handed holding scenario, the antenna assembly 100 can still be a broadband antenna in the MHB band (1.7~2.7GHz), and then support B3 band, B1 band, B41 band (Wi-Fi 2.4G band), etc., to achieve full band coverage of the MHB band (1.7~2.7GHz).

[0159] See also Fig.18 , Fig.18It is the efficiency curve of the electronic device 1000 provided by the embodiment of the present application in free space and in the horizontal screen two-handed holding scenario. Among them, curve a (red solid line) is the system efficiency curve of the electronic device 1000 in free space. Curve b (green solid line) is the system efficiency curve of the electronic device 1000 in the horizontal screen two-handed holding scenario. Curve c (red dotted line) is the radiation efficiency curve of the electronic device 1000 in free space. Curve d (green dotted line) is the radiation efficiency curve of the electronic device 1000 in the horizontal screen two-handed holding scenario.

[0160] It can be seen that in free space, the antenna assembly 100 has a high system efficiency (greater than -4.5dB) in the MHB band (1.7~2.7GHz), and supports the B3 band, B1 band, B41 band (Wi-Fi 2.4G band), etc., to achieve full band coverage of the MHB band (1.7~2.7GHz). In the horizontal screen two-handed holding scenario, the antenna assembly 100 can still have a high system efficiency (greater than -7dB) in the MHB band (1.7~2.7GHz), and has good system efficiency in the B3 band, B1 band, B41 band (Wi-Fi2.4G band) and other bands.

[0161] Please refer to Table 1, which is a comparison of the efficiency of the electronic device 1000 provided in the embodiment of the present application in the B3 band, B1 band, B40 band, Wi-Fi 2.4G band, and B41 band in free space and in the horizontal screen two-handed holding scenario (USB port facing the operator's right hand side). It can be seen that in free space, the efficiency of the antenna assembly 100 in the B3 band, B1 band, B40 band, Wi-Fi 2.4G band, and B41 band is greater than -4.5dB, indicating that the antenna assembly 100 has good efficiency in the B3 band, B1 band, B40 band, Wi-Fi 2.4G band, and B41 band in free space. It can be seen that in the horizontal screen and two-handed holding scenario, the efficiency of the antenna assembly 100 in the B3 band, B1 band, B40 band, Wi-Fi 2.4G band, and B41 band are all greater than or equal to -4.5dB, indicating that the antenna assembly 100 has good efficiency in the B3 band, B1 band, B40 band, Wi-Fi 2.4G band, and B41 band in the horizontal screen and two-handed holding scenario.

[0162] Table 1

[0163] Frequency band System efficiency in free space Horizontal screen with both hands (USB port facing the operator's right hand) B3 -2.7 -3.3 B1 -3.4 -4.5 B40 -3.6 -3.6 Wi-Fi 2.4G -2.5 -3.1 B41 -2.7 -4

[0164] The antenna assembly 100 provided in the present application uses two radiators to realize four resonant modes to form a broadband antenna, wherein the T-shaped parasitic branch (the second radiator 20) effectively expands the antenna bandwidth, improves the antenna efficiency, and reduces the number of antenna branches, which is beneficial for layout on an electronic device 1000 with limited space; compared to a broadband antenna that realizes four modes through three or more branches, the present application can reduce the occupied space while supporting multiple frequency bands.

[0165] 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 the field can change, modify, replace and modify the above embodiments within the scope of the present application, and these improvements and modifications are also regarded as the scope of protection of the present application.

Claims

1. An antenna assembly, characterized in that: include: A first radiator, the first radiator comprising a first open end, a feeding point, and a second open end; A second radiator, the second radiator comprising a third open end, a ground point, and a fourth open end, and a coupling gap is between the second open end and the third open end; and A feed source, the feed source is electrically connected to the feed point, the feed source is used to excite the first radiator and the second radiator to form at least a first resonance mode supporting a first frequency band, the distance between the feed point and the first open end is less than or equal to 1 / 8 wavelength of the resonance frequency of the first frequency band, the resonance current of the first resonance mode includes a first sub-current on the first radiator and a second sub-current on the second radiator, and the direction of the first sub-current is the same as the direction of the second sub-current.

2. The antenna assembly according to claim 1, wherein: The current intensity distribution of the first sub-current on the first radiator includes first increasing and then decreasing; the current intensity distribution of the second sub-current on the second radiator includes first increasing and then decreasing.

3. The antenna assembly according to claim 1, wherein: The first sub-current includes a 1 / 2 wavelength current distribution supporting the first frequency band, and the second sub-current includes a 1 / 2 wavelength current distribution supporting the first frequency band.

4. The antenna assembly according to claim 1, wherein: The feed source is also used to excite the first radiator and the second radiator to form at least a second resonance mode supporting a second frequency band, and the resonance current of the second resonance mode includes a third sub-current on the first radiator and a fourth sub-current on the second radiator, and the direction of the third sub-current is opposite to the direction of the fourth sub-current.

5. The antenna assembly according to claim 4, characterized in that: The resonant frequency of the second frequency band is greater than the resonant frequency of the first frequency band, and the difference between the resonant frequency of the second frequency band and the resonant frequency of the first frequency band is less than a first preset frequency band difference.

6. The antenna assembly according to claim 5, characterized in that The first preset frequency band difference is 300 MHz.

7. The antenna assembly according to claim 1, wherein: The feed source is also used to excite the first radiator and the second radiator to form at least a third resonance mode supporting a third frequency band, the resonance current of the third resonance mode includes a fifth sub-current on the first radiator and a sixth sub-current between the grounding point and the third opening end, and the direction of the fifth sub-current is the same as the direction of the sixth sub-current.

8. The antenna assembly according to claim 7, wherein: The resonant frequency of the third frequency band is lower than the resonant frequency of the first frequency band.

9. The antenna assembly according to claim 7, wherein: The difference between the resonant frequency of the third frequency band and the resonant frequency of the B3 frequency band is less than the second preset frequency band difference; the difference between the resonant frequency of the first frequency band and the resonant frequency of the B41 frequency band or the Wi-Fi 2.4G frequency band is less than the third preset frequency band difference.

10. The antenna assembly according to claim 1, wherein: The feed source is also used to excite the second radiator to form at least a fourth resonance mode supporting a fourth frequency band, the resonance current of the fourth resonance mode includes an eighth sub-current between the fourth opening end and the grounding point and a seventh sub-current between the grounding point and the third opening end, and the direction of the seventh sub-current is opposite to that of the eighth sub-current.

11. The antenna assembly according to claim 10, wherein: The resonant frequency of the fourth frequency band is less than the resonant frequency of the fourth frequency band; the difference between the resonant frequency of the fourth frequency band and the resonant frequency of the B1 frequency band is less than the fourth preset frequency band difference.

12. The antenna assembly according to claim 11, wherein: The feeding point is located at the first opening end.

13. The antenna assembly according to any one of claims 1 to 12, characterized in that: The distance between the ground point and the center position of the second radiator is less than or equal to a first preset distance.

14. The antenna assembly according to claim 1, wherein: The feed source is also used to excite the first radiator and the second radiator to form at least a third resonance mode supporting a third frequency band, a first resonance mode of a fourth frequency band, and a second resonance mode of the second frequency band, and the third frequency band, the fourth frequency band, the first frequency band, and the second frequency band form a continuous frequency band, and the continuous frequency band covers 1.7 to 2.7 GHz.

15. An electronic device, characterized in that: The invention comprises the antenna assembly as claimed in any one of claims 1 to 14.

16. The electronic device according to claim 15, characterized in that: The electronic device also includes a frame, a main circuit board, and a battery. The frame includes a top frame, a first side frame, a bottom frame, and a second side frame connected in sequence. The main circuit board and the battery are arranged in an area surrounded by the frame. The top frame, the main circuit board, the battery, and the bottom frame are arranged in sequence; the first radiator and the second radiator are both located in any one of the top frame, the first side frame, the bottom frame, and the second side frame.

17. The electronic device according to claim 16, characterized in that: When the first radiator is disposed on the first side frame, the first opening end is adjacent to the main circuit board, the second opening end is adjacent to the battery, and the second radiator is located on a portion of the first side frame adjacent to the battery.

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