Antenna assembly and electronic equipment

Abstract

The invention provides an antenna assembly and electronic equipment, the antenna assembly comprises a radiator and a first feed source, the radiator comprises a first open end, a feed point, a second open end, a third open end and a first grounding point, and a first coupling gap is formed between the second open end and the third open end; the first feed source is electrically connected with the feed point; the first feed source is used for exciting the radiator to form a first resonant mode supporting a first frequency band, and resonant current of the first resonant mode is mainly distributed between a feed point and a first grounding point. The direction of the resonance current of the first resonance mode between the feeding point and the second opening end is the same as the direction of the resonance current between the third opening end and the first grounding point, and the first frequency band covers at least part of a medium-high frequency band or an ultrahigh frequency band; the antenna assembly can support the first frequency band and has a relatively long radiation aperture, so that the efficiency of the first frequency band is improved, and the structure of the radiator can support more frequency bands subsequently.

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 development of network technology, the use scenarios of electronic devices such as mobile phones are becoming more and more complex. How to make the frequency bands supported by antenna components have higher efficiency and support more frequency bands has become a technical problem that needs to be solved. Summary of the invention

[0003] The present application provides an antenna assembly that enables a supported frequency band to have higher efficiency and can support more frequency bands, and an electronic device having the antenna assembly.

[0004] In a first aspect, an antenna assembly provided by an embodiment of the present application includes:

[0005] A radiator, comprising a first open end, a feeding point, a second open end, a third open end and a first grounding point, wherein a first coupling gap is formed between the second open end and the third open end;

[0006] A first feed source, the first feed source is electrically connected to the feeding point; the first feed source is used to excite the radiator to form a first resonance mode supporting a first frequency band, the resonance current of the first resonance mode is mainly distributed between the feeding point and the first grounding point, and the first frequency band covers at least part of the medium and high frequency band or the ultra-high frequency band.

[0007] The present application designs an antenna component including a radiator and a first feed source, the radiator including a first open end, a feeding point, a second open end, a third open end and a first grounding point, and a first coupling gap is formed between the second open end and the third open end; the first feed source is electrically connected to the feeding point; the first feed source is used to excite the radiator to form a first resonance mode supporting a first frequency band, the resonance current of the first resonance mode is mainly distributed between the feeding point and the first grounding point, the resonance current direction of the first resonance mode between the feeding point and the second open end is the same as the resonance current direction between the third open end and the first grounding point, the first frequency band covers at least part of the medium and high frequency band or the ultra-high frequency band, the antenna component can support the first frequency band and has a relatively long radiation aperture to increase the efficiency of the first frequency band, and also facilitates the structure of the radiator to support more frequency bands in the future.

[0008] In a second aspect, the present application provides an electronic device, comprising the antenna assembly described in the first aspect. 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 It is a structural schematic diagram of an electronic device provided in an embodiment of the present application;

[0011] Figure 2 is a partial exploded schematic diagram of an electronic device provided in an embodiment of the present application;

[0012] Figure 3 It is a partial back view of the electronic device provided by the embodiment of the present application without the back cover;

[0013] Figure 4 This is a schematic diagram of the structure of the antenna assembly provided in Example 1 of the present application. Figure 1 ;

[0014] Figure 5 This is a schematic diagram of the current distribution of the first resonance mode provided in Example 1 of the present application. Figure 1 ;

[0015] Figure 6 The current distribution simulation of the first resonance mode provided in the first embodiment of the present application is Figure 1 ;

[0016] Figure 7 This is a schematic diagram of the current distribution of the first resonance mode provided in Example 1 of the present application. Figure 2 ;

[0017] Figure 8 This is a schematic diagram of the structure of the antenna assembly provided in Example 1 of the present application. Figure 2 ;

[0018] Fig. 9 is a schematic diagram of current distribution in the second resonance mode on the antenna assembly provided in Example 1 of the present application;

[0019] Fig.10 is a simulation diagram of current distribution of the second resonant mode on the antenna assembly provided in Example 1 of the present application;

[0020] Fig.11 This is a schematic diagram of the structure of the antenna assembly provided in Example 1 of the present application. Figure 3 ;

[0021] Fig.12 is a schematic diagram of current distribution in the third resonance mode on the antenna assembly provided in the second embodiment of the present application;

[0022] Fig.13 is a current distribution simulation diagram of the third resonant mode on the antenna assembly provided in the second embodiment of the present application;

[0023] Fig.14 This is a schematic diagram of the structure of the antenna assembly provided in Example 2 of the present application. Figure 1 ;

[0024] Fig.15 is a schematic diagram of current distribution of the fourth resonance mode on the antenna assembly provided in the second embodiment of the present application;

[0025] Fig.16 is a current distribution simulation diagram of the fourth resonant mode on the antenna assembly provided in Example 2 of the present application;

[0026] Fig.17 Schematic diagram of the current distribution of the first resonant mode on the antenna assembly provided in the second embodiment of the present application Figure 2 ;

[0027] Fig.18 The current distribution simulation of the first resonant mode on the antenna assembly provided in the second embodiment of the present application is Figure 2 ;

[0028] Fig.19 This is a schematic diagram of the structure of the antenna assembly provided in Example 3 of the present application. Figure 1 ;

[0029] Fig. 20 This is a schematic diagram of the structure of the antenna assembly provided in Example 3 of the present application. Figure 2 ;

[0030] Fig.21 is a schematic structural diagram of a first matching circuit provided in an embodiment of the present application;

[0031] Fig. 22 is a schematic structural diagram of a second matching circuit provided in an embodiment of the present application;

[0032] Fig.23 is a schematic diagram of the structure of an antenna assembly provided in an embodiment of the present application;

[0033] Fig.24 yes Fig.11 S parameter curves of the first frequency band and the second frequency band where the first feed source excitation radiator and the parasitic radiation section of the provided antenna assembly are located;

[0034] Fig.25 yes Fig.11 The system efficiency curves of the first frequency band and the second frequency band where the first feed source excitation radiator and the parasitic radiation section of the provided antenna assembly are located;

[0035] Fig.26 yes Fig.23 The S parameter curve of the supported frequency band where the first feed source and the second feed source of the provided antenna assembly excite the radiator;

[0036] Fig. 27 yes Fig.23 The provided antenna assembly provides efficiency curves of the supported frequency bands where the first feed source and the second feed source excite the radiator. DETAILED DESCRIPTION

[0037] 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.

[0038] 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.

[0039] 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.

[0040] 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.

[0041] 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 components such as a main board 600, a camera module, a receiver module, a battery 700, a 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.

[0042] 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.

[0043] 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.

[0044] See also Figure 3, 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 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.

[0045] The specific structure of the antenna assembly 100 provided in the first embodiment is described below with reference to the accompanying drawings.

[0046] See also Figure 3 and Figure 4 The antenna assembly 100 includes a radiator 10 and a first feed source 21 .

[0047] The present application does not specifically limit the material of the radiator 10. Optionally, the material of the 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 radiator 10. For example, the shape of the radiator 10 includes but is not limited to a strip, a sheet, a rod, a coating, a film, etc. Figure 3 The radiator 10 shown is only an example and does not limit the shape of the radiator 10 provided in the present application. In the present embodiment, the radiators 10 are all in strip shape. The present application does not limit the extension trajectory of the radiator 10. Optionally, the radiator 10 can extend along a straight line, or along a curve, or along a bending line. The radiator 10 can be a line with uniform width on the extension trajectory, or a strip with unequal width such as a gradient width and a widened area.

[0048] The present application does not specifically limit the form of the radiator 10. Optionally, the form of the radiator 10 includes but is not limited to a metal frame 320, a metal frame embedded in a plastic frame 320, a metal radiator 10 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 radiator 10 is taken as a part of the metal frame 320 of the electronic device 1000 as an example.

[0049] The present application does not limit the radiator 10 to be disposed on any one of the top frame 321 , the bottom frame 324 , the first side frame 322 , and the second side frame 323 . In this embodiment, the radiator 10 is disposed on the first side frame 322 close to the top frame 321 .

[0050] See also Figure 3 and Figure 4 The radiator 10 includes a first opening end E1, a feeding point A, a second opening end E2, a third opening end E3 and a first grounding point D1.

[0051] The open end mentioned in the present application refers to an end that is disconnected from other conductive parts on the frame 320 by a crack and disconnected from the reference ground system 500. In order to ensure the structural strength of the frame 320 of the electronic device 1000, the crack is filled with an insulating material.

[0052] The grounding point 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 returning the ground point to the ground through a grounding spring; or, the grounding point and the reference ground system 500 are interconnected as a whole, that is, through a physical return to the ground method.

[0053] See also Figure 4 , the portion between the feed point A and the second open end E2 is defined as the first radiation segment 11, and the portion between the third open end E3 and the first grounding point D1 is defined as the second radiation segment 12. The portion between the feed point A and the first open end E1 is defined as the third radiation segment 13. The third radiation segment 13 is interconnected with the first radiation segment 11 as a whole.

[0054] See also Figure 4 , a first coupling gap G1 is formed between the second opening end E2 and the third opening end E3. In other words, a first coupling gap G1 is formed between the first radiation section 11 and the second radiation section 12.

[0055] Among them, the first coupling gap G1 is a broken gap, and the width of the first coupling gap G1 is 0.3 to 2 mm, but is not limited to this size. The first radiation segment 11 and the second radiation segment 12 can generate capacitive coupling through the first coupling gap G1. Optionally, the first radiation segment 11 and the second radiation segment 12 can be regarded as two parts formed by the frame 320 being separated by the first coupling gap G1. Among them, "capacitive coupling" means that the first coupling gap G1 between the first radiation segment 11 and the second radiation segment 12 generates an electric field, and the signal of the first radiation segment 11 can be transmitted to the second radiation segment 12 through the electric field, so that the first radiation segment 11 and the second radiation segment 12 can achieve electrical signal conduction even when they are not directly electrically connected.

[0056] See also Figure 4 , the antenna assembly 100 also includes a first matching circuit M1.

[0057] See also Figure 4 , the first matching circuit M1 is electrically connected between the feeding point A and the first feed source 21.

[0058] Optionally, the feeding point A may be a bump on the inner side of the frame 320 that protrudes toward the reference ground system 500 .

[0059] See also Figure 4 The first matching circuit M1 is electrically connected between the first feed source 21 and the feeding point A. The first matching circuit M1 includes at least one of a capacitor and an inductor. The first matching circuit M1 helps the first feed source 21 to excite a first resonant mode on the radiator 10 by adjusting the impedance matching between the first feed source 21 port (the aforementioned feeding port) and the radiator 10 port.

[0060] See also Figure 4 , the first matching circuit M1 is electrically connected to the feeding point A. The electrical connection described in the present application includes direct electrical connection between two structures, or indirect electrical connection through other components. In this embodiment, the first matching circuit M1 is indirectly electrically connected to the feeding point A through a radio frequency transmission line, a feeding spring, etc.

[0061] The first feed source 21 includes but is not limited to a radio frequency transceiver chip, a radio frequency front-end circuit, etc. The first feed source 21 electrically connected to the first matching circuit M1 includes but is not limited to a radio frequency transmission line.

[0062] The first feed source 21 is used to excite the radiator 10 to form a first resonance mode supporting a first frequency band. The first frequency band covers at least part of a medium-high frequency band or an ultra-high frequency band.

[0063] Among them, the medium and high frequency bands include part of the 1.7-2.7 GHz frequency band (such as B3 / B39 / B1 / B40 / B41 / Wi-Fi2.4G frequency band, etc.) or all frequency bands. Among them, the B3 / B39 / B1 / B40 / B41 frequency bands can be 2G / 3G / 4G / 5G / 6G communication standards.

[0064] Among them, the ultra-high frequency band includes some frequency bands above 2.7 GHz (such as N77 band / N78 band / N79 band / Wi-Fi 5G band, etc.) or all frequency bands.

[0065] See also Figure 5 , the resonant current of the first resonant mode is mainly distributed between the feeding point A and the first grounding point D1 (ie, on the first radiation section 11 and the second radiation section 12).

[0066] Specifically, the first feed source 21 can at least provide a radio frequency excitation signal in a first frequency band. When the mid-high frequency band is 1.7 to 2.7 GHz, the first frequency band is a partial frequency band in the range of 1.7 to 2.7 GHz. For example, the resonant frequency of the first frequency band is 2.6 GHz. Of course, the resonant frequency of the first frequency band can also be other frequencies.

[0067] The direction of the resonant current of the first resonant mode between the feeding point A and the second open end E2 is the same as the direction of the resonant current between the third open end E3 and the first ground point D1.

[0068] For further optional information, see Figure 5 , in the first resonant mode, the current direction between the feed point A and the second open end E2 (the first radiation section 11) is the same as the current direction between the third open end E3 and the first grounding point D1 (the second radiation section 12). Optionally, the current between the feed point A and the second open end E2 (the first radiation section 11) and the current between the third open end E3 and the first grounding point D1 (the second radiation section 12) are in-phase currents. At this time, the first resonant mode is the common mode mode of the radiator 10. In the common mode, the same-direction current is formed on the first radiation section 11 and the second radiation section 12. In this way, in the first frequency band, the length of the same-direction current is increased, the radiation aperture is increased, and the efficiency is increased.

[0069] See also Figure 5 and Figure 6 , at a certain phase, the resonant current (dashed arrow) on the radiator 10 can flow from the feeding point A to the second open end E2, and flow from the third open end E3 to the first ground point D1.

[0070] In another phase, the resonant current on the radiator 10 may also flow from the first ground point D1 to the third open end E3 , and flow to the feeding point A from the second open end E2 .

[0071] See also Figure 6 The feeding point A and the portion between the feeding point A and the second opening end E2 and close to the feeding point A are high current areas. Figure 6 The red area in the graph indicates that the current intensity is stronger.

[0072] See also Figure 6 , the area near the second opening end E2 and the area near the third opening end E3 is a weak current area. Figure 6 The green area in the figure indicates that the current intensity is weaker.

[0073] The present application designs an antenna assembly 100 including a radiator 10 and a first feed source 21. The radiator 10 includes a first open end E1, a feeding point A, a second open end E2, a third open end E3 and a first grounding point D1. A first coupling gap is formed between the second open end E2 and the third open end E3. The first feed source 21 is electrically connected to the feeding point A. The first feed source 21 is used to excite the radiator 10 to form a first resonance mode supporting a first frequency band. The resonance current of the first resonance mode is mainly distributed between the feeding point A and the first grounding point D1. The resonance current direction of the first resonance mode between the feeding point A and the second open end E2 is the same as the resonance current direction between the third open end E3 and the first grounding point D1. The first frequency band covers at least part of the medium and high frequency band or the ultra-high frequency band. The antenna assembly 100 can support the first frequency band and has a relatively long radiation aperture to increase the efficiency of the first frequency band, and it is also convenient for the structure of the radiator 10 to support more frequency bands in the future.

[0074] In an alternative implementation, see Figure 7 , the distance between the feed point A and the second open end E2 is greater than or equal to the distance between the third open end E3 and the first grounding point D1. In other words, the distance h1 between the first grounding point D1 and the third open end E3 is less than or equal to the distance h2 between the second open end E2 and the feed point A. In other words, the length of the first radiation section 11 is greater than the length of the second radiation section 12.

[0075] Further optionally, the electrical length between the feed point A and the second open end E2 is close to 1 / 4 wavelength of the center frequency of the first frequency band, so as to form a 1 / 4 wavelength mode supporting the first frequency band between the feed point A and the second open end E2 (on the first radiation segment 11). That is, the first resonant mode includes the 1 / 4 wavelength mode of the first frequency band, and the 1 / 4 wavelength mode is the fundamental mode, so that the first frequency band has a higher efficiency.

[0076] Furthermore, the length of the second radiation segment 12 is set to be less than or equal to the length of the first radiation segment 11, so as to facilitate the formation of a current in the second radiation segment 12 that is in phase with the first radiation segment 11, forming a common mode mode, and avoiding or reducing the generation of reverse current. In this way, in the first frequency band, the length of the current in the same direction is increased, the radiation aperture is increased, and the efficiency is increased.

[0077] Optional, see Figure 8 The antenna assembly 100 further includes a parasitic radiation section 14. The parasitic radiation section 14 includes a fourth opening end E4 and a second grounding point D2. Specifically, the two ends of the parasitic radiation section 14 are the fourth opening end E4 and the second grounding point D2, respectively.

[0078] See also Figure 8 The second coupling gap G2 is formed between the fourth opening end E4 and the first opening end E1. When the radiator 10 and the parasitic radiation section 14 are both part of the frame 320, the second coupling gap G2 is filled with an insulating medium to ensure the overall strength of the frame 320.

[0079] Further optionally, the length of the parasitic radiation section 14 is less than or equal to the distance between the feed point A and the first opening end E1. When the length of the parasitic radiation section 14 is less than the length of the third radiation section 13, by setting the width of the second coupling gap G2 to be less than or equal to the second preset width, the coupling amount between the fourth opening end E4 and the first opening end E1 is increased, which is conducive to forming a current with the same direction and uniform intensity on the parasitic radiation section 14, forming a current with uniform current intensity distribution, and is conducive to improving the bandwidth and efficiency of the ultra-high frequency band or the medium and high frequency band.

[0080] The present application does not specifically limit the size of the second preset width. Optionally, the second preset width is 2 mm, and the width of the second coupling gap G2 is less than or equal to 2 mm. Further optionally, the second preset width is 1.9 mm, 1.8 mm, 1.7 mm, 1.6 mm, 1.5 mm, 1.4 mm, 1.3 mm, 1.2 mm, 1.1 mm, 1.0 mm, 0.9 mm, 0.8 mm, 0.7 mm, 0.6 mm, 0.5 mm, any one of them or a value between the two.

[0081] The first feed source 21 is also used to excite the radiator 10 to form a second resonance mode supporting a second frequency band.

[0082] See also Fig. 9 The resonant current of the second resonant mode is mainly distributed between the feeding point A and the second grounding point D2 (ie, on the third radiation section 13 and the parasitic radiation section 14). The second frequency band covers at least part of the medium and high frequency bands.

[0083] In an optional implementation manner, both the first frequency band and the second frequency band are used to cover at least part of the mid-high frequency band.

[0084] For example, when the mid-high frequency band is 1.7-2.7 GHz, the second frequency band is a partial frequency band of 1.7-2.7 GHz. The resonant frequency of the second frequency band is 1.8 GHz. Of course, the resonant frequency of the second frequency band can also be other frequencies.

[0085] Specifically, the first feed source 21 can at least provide a medium-high frequency band. The first feed source 21 can excite at least two resonant modes on the radiator 10. From the S11 reflection curve, it can be seen that under the excitation of the first feed source 21, at least two concave troughs can be formed on the radiator 10 in the medium-high frequency band. Each resonant mode corresponds to a concave trough.

[0086] It can be seen from the efficiency curve that under the excitation of the first feed source 21, the efficiency of the radiator 10 in part or all of the medium and high frequency bands is greater than the first preset efficiency (i.e., has a better efficiency). The present application does not make a specific limitation on the first preset efficiency. For example, the first preset efficiency is -7.5dB.

[0087] The center frequency of the second frequency band is smaller than the center frequency of the first frequency band. In other words, the length between the feeding point A and the second open end E2 is smaller than the length between the feeding point A and the first open end E1.

[0088] For example, the resonant frequency of the second frequency band is 1.8 GHz, and the resonant frequency of the first frequency band is 2.6 GHz.

[0089] The direction of the resonant current in the second resonant mode between the feeding point A and the first open end E1 is the same as the direction of the resonant current between the fourth open end E4 and the second ground point D2.

[0090] Further optionally, in the second resonant mode, the direction of the current between the feed point A and the first open end E1 (the third radiation segment 13) is the same as the direction of the current between the fourth open end E4 and the second grounding point D2 (the parasitic radiation segment 14). Optionally, the current between the feed point A and the first open end E1 (the third radiation segment 13) and the current between the fourth open end E4 and the second grounding point D2 (the parasitic radiation segment 14) are in-phase currents. At this time, the second resonant mode is the common mode mode of the radiator 10, and in the common mode, the same direction current is formed on the third radiation segment 13 and the parasitic radiation segment 14. In this way, in the first frequency band, the length of the same direction current is increased, the radiation aperture is increased, and the efficiency is increased.

[0091] See also Fig. 9, at a certain phase, the resonant current (dashed arrow) on the radiator 10 can flow from the feeding point A to the first open end E1, and flow from the fourth open end E4 to the second grounding point D2.

[0092] In another phase, the resonant current on the radiator 10 may also flow from the second grounding point D2 to the fourth open end E4 , and flow from the first open end E1 to the feeding point A.

[0093] See also Fig.10 , the current between the fourth opening end E4 and the first opening end E1 is in the same direction and has a relatively strong intensity. Fig.10 The red area in the graph indicates that the current intensity is stronger.

[0094] The second resonant mode forms a common mode with the same direction and strong and uniform current intensity in the third radiation section 13 and the parasitic radiation section 14. Thus, in the first frequency band, the length of the same direction current increases, thereby increasing the radiation aperture and thus increasing the efficiency.

[0095] The width of the second coupling gap G2 is less than or equal to the width of the first coupling gap G1.

[0096] For further optional information, see Fig. 9 , the width of the second coupling gap G2 is less than or equal to the first preset width. Optionally, the present application does not make specific limitations on the first preset width. Optionally, the first preset width is 1mm, so that the width of the second coupling gap G2 is less than or equal to 1mm. Further optionally, the first preset width is 0.9mm, so that the width of the second coupling gap G2 is less than or equal to 0.9mm. Further optionally, the first preset width is 0.8mm, so that the width of the second coupling gap G2 is less than or equal to 0.8mm. Further optionally, the first preset width is 0.7mm, so that the width of the second coupling gap G2 is less than or equal to 0.7mm. Further optionally, the first preset width is 0.6mm, so that the width of the second coupling gap G2 is less than or equal to 0.6mm. Further optionally, the first preset width is 0.5mm, so that the width of the second coupling gap G2 is less than or equal to 0.5mm.

[0097] In this embodiment, the width of the second coupling gap G2 is set to be smaller to increase the coupling capacitance between the third radiation segment 13 and the parasitic radiation segment 14, thereby increasing the resonant current intensity on the parasitic radiation segment 14, which is beneficial to the formation of in-phase currents on the third radiation segment 13 and the parasitic radiation segment 14, and the current directions on the third radiation segment 13 and the parasitic radiation segment 14 are the same. In this way, when working in the first frequency band, the length of the in-phase current is increased, the radiation aperture is increased, and the efficiency is increased.

[0098] The second coupling gap G2 is equivalent to a series capacitor between the third radiation segment 13 and the parasitic radiation segment 14 to offset the inductance, which is conducive to forming a current in the parasitic radiation segment 14 that is in phase with the third radiation segment 13 .

[0099] In other embodiments, the width of the second coupling gap G2 may be greater than the first preset width.

[0100] The first frequency band and the second frequency band form a continuous frequency band, and the continuous frequency band covers 1.71-2.7 GHz. The antenna supports an operating bandwidth of 1.71-2.7 GHz, covering a wide bandwidth mid-high frequency band (for example, LTE B3 / B39 / B1 / B40 / B41, or Wi-Fi 2.4G).

[0101] In the first embodiment of the present application, the antenna assembly 100 is designed to include a radiator 10 and a first feed source 21. The radiator 10 includes a first opening end E1, a feeding point A, a second opening end E2, a third opening end E3 and a first grounding point D1. A first coupling gap G1 is formed between the second opening end E2 and the third opening end E3. The first feed source 21 is used to excite the radiator 10 to form at least two resonant modes to support medium and high frequency bands, and can cover multiple frequency bands in a limited space.

[0102] In an alternative implementation, see Fig.11 The radiator 10 further includes a first extending protrusion 101 connected to the first opening end E1. An extending direction of the first extending protrusion 101 intersects with an extending direction of the radiator 10.

[0103] Optionally, the first extending protrusion 101 and the first opening end E1 are interconnected to form an integral structure. Further optionally, the extending direction of the first extending protrusion 101 may be perpendicular to the extending direction (length direction) of the radiator 10 .

[0104] See also Fig.11 The radiator 10 further includes a second extending protrusion 102 connected to the fourth opening end E4. The extending direction of the second extending protrusion 102 intersects with the extending direction of the radiator 10. The first extending protrusion 101 and the second extending protrusion 102 are opposite to each other and spaced apart.

[0105] Optionally, the second extension protrusion 102 and the fourth opening end E4 are interconnected to form an integral structure. Further optionally, the extension direction of the second extension protrusion 102 may be perpendicular to the extension direction (length direction) of the radiator 10 .

[0106] Furthermore, the first extension protrusion 101 and the second extension protrusion 102 are also located on both sides of the first coupling gap G1. The arrangement of the first extension protrusion 101 and the second extension protrusion 102 can further increase the area directly facing the first coupling gap G1, which is also the coupling area, and further increase the coupling capacitance between the third radiation segment 13 and the second radiation segment 12, which is beneficial for coupling more resonant currents on the second radiation segment 12, and for forming the same-phase currents on the third radiation segment 13 and the second radiation segment 12, and the current directions on the third radiation segment 13 and the second radiation segment 12 are the same, so that when working in the first frequency band, the length of the same-direction current increases, the radiation aperture increases, and the efficiency increases.

[0107] In other embodiments, the extension direction of the first extension protrusion 101 is inclined compared to the extension direction of the radiator 10, the extension direction of the second extension protrusion 102 is inclined compared to the extension direction of the radiator 10, and the extension direction of the first extension protrusion 101 is parallel to the extension direction of the second extension protrusion 102. In this way, in the direction perpendicular to the radiator 10, the facing area of ​​the first coupling gap G1 can be increased with less space.

[0108] In other embodiments, the radiator 10 may not be provided with the first extending protrusion 101 and the second extending protrusion 102 .

[0109] The above embodiments may include at least the following situations: 1. The width of the first coupling gap G1 is less than or equal to the first preset width, and the first extension protrusion 101 and the second extension protrusion 102 are not provided on the radiator 10, and the coupling capacitance is increased by setting a smaller width of the first coupling gap G1. 2. The width of the first coupling gap G1 is less than or equal to the first preset width, and the first extension protrusion 101 and the second extension protrusion 102 are provided on the radiator 10, and the coupling capacitance is increased by setting a smaller width of the first coupling gap G1 and a larger coupling area. 3. The width of the first coupling gap G1 is greater than the first preset width, and the first extension protrusion 101 and the second extension protrusion 102 are provided on the radiator 10, and the coupling capacitance is increased by setting a larger coupling area.

[0110] In other embodiments, the antenna assembly 100 may not include the second radiation section 12, the resonance current of the first resonance mode is distributed between the feed point A and the second open end E2, and the first resonance mode includes a 1 / 4 wavelength mode of the first frequency band. In other words, the first radiation section 11 is close to a 1 / 4 wavelength of the first frequency band.

[0111] See also Fig.12Embodiment 2 of the present application further provides an antenna assembly 100, the antenna assembly 100 includes the first feed source 21 and the radiator 10 as described above. On the basis of the first feed source 21 exciting the radiator 10 to form the first resonant mode as described above, the first feed source 21 is also used to excite the first opening end E1 and the second opening end E2 to form a third resonant mode supporting a third frequency band.

[0112] Optionally, the first frequency band may cover an ultra-high frequency band, for example, a Wi-Fi 5G band.

[0113] The resonant current of the third resonant mode is mainly distributed between the second open end E2 and the first open end E1 (the first radiation section 11 + the third radiation section 13). The third frequency band covers at least part of the medium and high frequency bands.

[0114] Specifically, the first feed source 21 can at least provide a radio frequency excitation signal of the third frequency band. For example, the first frequency band covers the Wi-Fi 2.4G frequency band. The first frequency band covers the Wi-Fi 5G frequency band. The first feed source 21 includes but is not limited to a Wi-Fi transceiver chip.

[0115] Further optionally, in the third resonance mode, a relatively strong resonance current is formed between the second open end E2 and the first open end E1 (the first radiation section 11 + the third radiation section 13 ).

[0116] The third resonance mode includes a 1 / 2 wavelength mode of the third frequency band.

[0117] See also Fig.12 , the resonant current of the third resonant mode (as shown by the dotted arrow in the figure) flows from the first opening end E1 to the second opening end E2, or the resonant current of the third resonant mode flows from the second opening end E2 to the first opening end E1.

[0118] See also Fig.13 , the second opening end E2 and the portion near the second opening end E2 are weak current areas. Fig.13 The green area in the figure indicates that the current intensity is weaker.

[0119] See also Fig.13 , the first opening end E1 and the area near the first opening end E1 are weak current areas. Fig.13 The green area in the figure indicates that the current intensity is weaker.

[0120] The intensity of the resonant current of the third resonant mode on the first radiation segment 11 + the third radiation segment 13 is distributed in a weak-strong-weak manner from the second opening end E2 to the first opening end E1.

[0121] Further optionally, the third resonant mode includes a 1 / 2 wavelength mode of the third frequency band. Specifically, the electrical length of the first radiation segment 11+the third radiation segment 13 is close to the 1 / 2 wavelength of the third frequency band, so that the first feed source 21 excites the first radiation segment 11+the third radiation segment 13 to form a 1 / 2 wavelength current mode supporting the third frequency band, thereby improving the efficiency in the third frequency band.

[0122] Optionally, the resonant frequency of the third frequency band is greater than the resonant frequency of the first frequency band.

[0123] Optional, see Fig.14 The antenna assembly 100 further includes a second feed source 22, a first matching circuit M1 and a second matching circuit M2.

[0124] The first matching circuit M1 is electrically connected between the feeding point A and the first feed source 21 .

[0125] See also Fig.14 The second matching circuit M2 is electrically connected between the second feed source 22 and the feeding point A. The second matching circuit M2 includes at least one of a capacitor and an inductor. The second matching circuit M2 facilitates the second feed source 22 to excite a second resonant mode on the radiator 10 by adjusting the impedance matching between the second feed source 22 port (the aforementioned feeding port) and the radiator 10 port.

[0126] The second feed source 22 includes but is not limited to a radio frequency transceiver chip, a radio frequency front-end circuit, etc. The second feed source 22 is electrically connected to the second matching circuit M2, including but not limited to a radio frequency transmission line.

[0127] Optionally, both the first feed source 21 and the second feed source 22 excite the radiator 10. Therefore, the first feed source 21 and the second feed source 22 share one radiator 10 to improve the utilization rate of the radiator 10. The radiator 10 occupies a small space and can support relatively more frequency bands.

[0128] The distance between the feeding point A and the second opening end E2 is smaller than the distance between the feeding point A and the first opening end E1.

[0129] Further optionally, the distance between the feeding point A and the second opening end E2 is smaller than the distance between the fourth opening end E4 and the second grounding point D2.

[0130] The second feed source 22 is used to excite a fourth resonance mode supporting a fourth frequency band from the fourth open end E4 to the second ground point D2.

[0131] For example, the first feed source 21 is a Wi-Fi frequency band transceiver module. The second feed source 22 includes an N78 frequency band transceiver module.

[0132] As mentioned above, the first feed source 21 is used to excite the first radiation section and the second radiation section of the radiator 10 to support the first resonance mode of the first frequency band, wherein the first frequency band covers the Wi-Fi 2.4G frequency band.

[0133] The fourth resonant mode includes a 1 / 4 wavelength mode of the fourth frequency band. Specifically, the electrical length of the parasitic radiation segment is close to 1 / 4 wavelength of the fourth frequency band, so that the second feed source 22 excites the parasitic radiation segment to form a 1 / 4 wavelength current mode supporting the fourth frequency band, thereby improving the efficiency in the fourth frequency band.

[0134] See also Fig.15 In one phase, optionally, the resonant current on the parasitic radiation section flows from the fourth opening end E4 to the second grounding point D2. In another phase, optionally, the resonant current on the parasitic radiation section flows from the second grounding point D2 to the fourth opening end E4.

[0135] See also Fig.16 , the second grounding point D2 and the part near the second grounding point D2 are high current areas. Fig.16 The red area in the graph indicates that the current intensity is stronger.

[0136] See also Fig.16 , the fourth opening end E4 and the area near the fourth opening end E4 are weak current areas. Fig.16 The green area in the figure indicates that the current intensity is weaker.

[0137] Further optionally, as mentioned above, the first feed source 21 excites the first radiation segment + the second radiation segment to form a first resonance mode supporting the first frequency band, wherein the first frequency band includes the Wi-Fi 5G band. The first feed source 21 excites the first radiation segment + the third radiation segment to form a third resonance mode supporting the third frequency band, wherein the third frequency band includes the Wi-Fi 2.4G band. Furthermore, the second feed source 22 excites the parasitic radiation segment to form a fourth resonance mode supporting the fourth frequency band, wherein the fourth frequency band includes the N78 band.

[0138] By designing the first feed source 21 and the second feed source 22 to share the same radiator 10, the space occupied by the radiator 10 can be reduced, and frequency bands such as Wi-Fi 2.4G band + N78 band + Wi-Fi 5G band can be effectively supported.

[0139] In other embodiments, see Fig.17 and Fig.18 , the antenna assembly 100 may not include the second radiation section 12, the resonance current of the first resonance mode is distributed between the feed point A and the second open end E2, and the first resonance mode includes a 1 / 4 wavelength mode of the first frequency band. In other words, the first radiation section 11 is close to a 1 / 4 wavelength of the first frequency band.

[0140] In the second embodiment of the present application, the antenna assembly 100 is designed to include a radiator 10 and a first feed source 21. The radiator 10 includes a first open end E1, a feeding point A, a second open end E2, a third open end E3 and a first grounding point D1. A first coupling gap G1 is formed between the second open end E2 and the third open end E3. The first feed source 21 is used to excite the radiator 10 to form a first resonance mode supporting the first frequency band, a second resonance mode of the second frequency band, and a third resonance mode of the third frequency band to support Wi-Fi 2.4G band + N78 band + Wi-Fi 5G band, and share the same radiator 10, so that multiple frequency bands can be covered in a limited space.

[0141] See also Fig.19 The third embodiment of the present application further provides an antenna assembly 100, and the antenna assembly 100 includes the first feed source 21, the second feed source 22, and the radiator 10 in the second embodiment.

[0142] See also Fig.19 The antenna assembly 100 further includes a combiner 51 , a first RF front-end circuit 41 , and a second RF front-end circuit 42 . Further, the antenna assembly 100 further includes a third RF front-end circuit 43 .

[0143] See also Fig.19 The first sub-end a1 of the combiner 51 is electrically connected to the first feed source 21. The second sub-end b1 of the combiner 51 is electrically connected to the second feed source 22. The third sub-end c1 of the combiner 51 is electrically connected to the feed point A. The second feed source 22 is used to provide an antenna signal of a fourth frequency band, and the fourth frequency band includes the N78 frequency band.

[0144] The first RF front-end circuit 41 is electrically connected between the first feed source 21 and the first sub-end a1 of the combiner 51. The first RF front-end circuit 41 is used to amplify the antenna signal of the third frequency band. Optionally, the third frequency band includes the Wi-Fi 2.4G frequency band.

[0145] The second RF front-end circuit 42 is electrically connected to the first feed source 21 and the first matching circuit M1. The second RF front-end circuit 42 is used to amplify the antenna signal of the first frequency band. The third RF front-end circuit 43 is used to amplify the antenna signal of the fourth frequency band.

[0146] Specifically, the first feed source 21 is electrically connected to one end of the first RF front-end circuit 41 and one end of the third RF front-end circuit 43; the other end of the first RF front-end circuit 41 is electrically connected to the first sub-end a1 of the combiner 51. The other end of the third RF front-end circuit 43 is electrically connected to the feeding point A of the radiator 10.

[0147] Specifically, the second feed source 22 is electrically connected to one end of the second RF front-end circuit 42, and the other end of the second RF front-end circuit 42 is electrically connected to the second sub-end b1 of the combiner 51. The third sub-end c1 of the combiner 51 is electrically connected to the feeding point A of the radiator 10.

[0148] In this way, the first frequency band provided by the first feed source 21 can be transmitted to the radiator 10 through the third RF front-end circuit 43. The third frequency band provided by the first feed source 21 can be transmitted to the feeding point A of the radiator 10 through the first RF front-end circuit 41 and the combiner 51 in sequence. The fourth frequency band provided by the second feed source 22 can be transmitted to the feeding point A of the radiator 10 through the second RF front-end circuit 42 and the combiner 51 in sequence. The above can not only realize that the first feed source 21 and the second feed source 22 share the radiator 10, but also realize that the first feed source 21 can send and receive antenna signals through a separate front-end path, which is beneficial to have higher efficiency when working in the first frequency band.

[0149] Compared with the present embodiment, in the antenna assembly 100 provided in the second embodiment, the first frequency band and the third frequency band provided by the first feed source 21 can be respectively transmitted and received via the radiator 10 via the antenna switch or combiner 51, and the fourth frequency band provided by the second feed source 22 transmits and receives antenna signals via a separate front-end path, thereby facilitating higher efficiency when the fourth frequency band operates.

[0150] In other embodiments, see Fig. 20 A switch unit 52 is provided between the other end of the first RF front-end circuit 41 and the first sub-end a1 of the combiner 51. The other end of the first RF front-end circuit 41 is electrically connected to the fixed end of the switch unit 52, the first selection end of the switch unit 52 is electrically connected to the second selection end of the antenna switch 53, and the second selection end of the switch unit 52 is electrically connected to the first sub-end a1 of the combiner 51. The fixed end of the antenna switch 53 is electrically connected to the feed point A of the radiator 10 or the first matching circuit M1. The first selection end of the antenna switch 53 is also electrically connected to the other end of the third RF front-end circuit 43.

[0151] When the first frequency band needs to work with higher efficiency, the switch unit 52 conducts the other end of the first RF front-end circuit 41 with the first sub-end a1 of the combiner 51. When the fourth frequency band needs to work with higher efficiency, the switch unit 52 conducts the other end of the first RF front-end circuit 41 with the radiator 10 (or the antenna switch 53).

[0152] In this implementation, please refer to Fig.21 , the first matching circuit M1 includes a first band-stop circuit M11. The first band-stop circuit M11 is a band-stop circuit of the fourth frequency band, which is used to block the signal of the fourth frequency band from affecting the first feed source 21, and improve the working efficiency of the first frequency band and the third frequency band. Optionally, the first band-stop circuit M11 includes an inductor, a capacitor, etc.

[0153] See also Fig. 22 , the second matching circuit M2 includes a second band-stop circuit M21 and a first band-pass circuit M22. The second band-stop circuit M21 is a band-stop circuit of the third frequency band, which is used to block the signal of the third frequency band from affecting the second feed source 22, thereby improving the working efficiency of the fourth frequency band. Optionally, the second band-stop circuit M21 includes an inductor, a capacitor, etc. Optionally, the first band-pass circuit M22 includes an inductor, a capacitor, etc.

[0154] The first bandpass circuit M22 is a bandpass circuit of the first frequency band. The first bandpass circuit M22 is grounded and is used to block the signal of the first frequency band from affecting the second feed source 22, thereby improving the working efficiency of the fourth frequency band.

[0155] The first matching circuit M1 and the second matching circuit M2 provided in this embodiment can effectively improve the isolation between the first feed source 21 and the second feed source 22 when they share the radiator 10, thereby improving the working efficiency of the first feed source 21 to excite the first frequency band and the second frequency band, and improving the working efficiency of the second feed source 22 to excite the third frequency band.

[0156] Optional, see Fig.21 , the first matching circuit M1 includes a first matching element P1. One end of the first matching element P1 is electrically connected to the feeding point A. The first band-resistance circuit M11 includes a first band-resistance sub-element M111 and a second band-resistance sub-element M112. One end of the first band-resistance sub-element M111 is electrically connected to the other end of the first matching element P1. One end of the second band-resistance sub-element M112 is electrically connected to the other end of the first matching element P1. The other end of the first band-resistance sub-element M111 and the other end of the second band-resistance sub-element M112 are electrically connected to the first feed source 21.

[0157] For example, the first matching element P1 includes but is not limited to a capacitor element. Further optionally, the first matching element P1 includes but is not limited to a small capacitor. For example, the capacitance value of the first matching element P1 is less than 2 pF.

[0158] For example, the first band-resistance sub-element M111 includes but is not limited to a capacitive element. Further optionally, the first band-resistance sub-element M111 includes but is not limited to a small capacitor. For example, the capacitance value of the first band-resistance sub-element M111 is less than 2 pF.

[0159] For example, the second band-resistance sub-element M112 includes but is not limited to an inductor element. Further optionally, the second band-resistance sub-element M112 includes but is not limited to a small inductor. For example, the inductance value of the second band-resistance sub-element M112 is less than 5 nH.

[0160] See also Fig. 22The second matching circuit M2 includes a second matching element P2, a third matching element P3, a fourth matching element P4 and a fifth matching element P5. One end of the second matching element P2 is electrically connected to the feeding point A, and the other end of the second matching element P2 is grounded.

[0161] The second band-resistance circuit M21 includes a third band-resistance sub-element M211 and a fourth band-resistance sub-element M212. One end of the third band-resistance sub-element M211 is electrically connected to one end of the second matching element P2, and the other end of the third band-resistance sub-element M211 is electrically connected to one end of the third matching element P3. One end of the fourth band-resistance sub-element M212 is electrically connected to one end of the second matching element P2, and the other end of the fourth band-resistance sub-element M212 is electrically connected to one end of the third matching element P3.

[0162] One end of the fourth matching element P4 is electrically connected to the other end of the third matching element P3 , and the other end of the fourth matching element P4 is electrically connected to one end of the fifth matching element P5 . The other end of the fifth matching element P5 is electrically connected to the second feed source 22 .

[0163] The first bandpass circuit M22 includes a first bandpass sub-element M221 and a second bandpass sub-element M222, one end of the first bandpass sub-element M221 is electrically connected to the other end of the third matching element P3, the other end of the first bandpass sub-element M221 is electrically connected to one end of the second bandpass sub-element M222, and the other end of the second bandpass sub-element M222 is grounded.

[0164] For example, the second matching element P2 includes but is not limited to a capacitor element. Further optionally, the second matching element P2 includes but is not limited to a small capacitor. For example, the capacitance value of the second matching element P2 is less than 0.3 pF.

[0165] For example, the third matching element P3 includes but is not limited to an inductor element. Further optionally, the third matching element P3 includes but is not limited to a small inductor. For example, the inductance value of the third matching element P3 is less than 5.1 nH.

[0166] For example, the fourth matching element P4 includes but is not limited to an inductor element. Further optionally, the fourth matching element P4 includes but is not limited to a small inductor. For example, the inductance value of the fourth matching element P4 is less than 7 nH.

[0167] For example, the fifth matching element P5 includes but is not limited to a capacitor element. Further optionally, the fifth matching element P5 includes but is not limited to a small capacitor. For example, the capacitance value of the fifth matching element P5 is less than 0.4 pF.

[0168] For example, the third band-resistance sub-element M211 includes but is not limited to a capacitive element. Further optionally, the third band-resistance sub-element M211 includes but is not limited to a small capacitor. For example, the capacitance value of the third band-resistance sub-element M211 is less than 2 pF.

[0169] For example, the fourth band-resisting sub-element M212 includes but is not limited to an inductor element. Further optionally, the fourth band-resisting sub-element M212 includes but is not limited to a small inductor. For example, the inductance value of the fourth band-resisting sub-element M212 is less than 8 nH.

[0170] For example, the first bandpass sub-element M221 includes but is not limited to a capacitive element. Further optionally, the first bandpass sub-element M221 includes but is not limited to a small capacitor. For example, the capacitance value of the first bandpass sub-element M221 is less than 2 pF.

[0171] For example, the second bandpass sub-element M222 includes but is not limited to an inductor element. Further optionally, the second bandpass sub-element M222 includes but is not limited to a small inductor. For example, the inductance value of the second bandpass sub-element M222 is less than 3 nH.

[0172] Optional, see Figure 6 and Fig.10 The radiator 10 further includes a third grounding point D3. Further, the third grounding point D3 is interconnected with the part of the middle plate that serves as the reference ground to prevent the radiator 10 from being suspended in the air compared to the middle plate, thereby improving the overall strength of the frame.

[0173] Further optionally, the third grounding point D3 is located between the feeding point A and the first open end E1. The distance between the third grounding point D3 and the feeding point A is less than the distance between the third grounding point D3 and the first open end E1. Further, the third grounding point D3 is located near the feeding point A. For the resonant current of the aforementioned second resonant mode, the third grounding point D3 is located at the current strong point of the second resonant mode, and the third grounding point D3 grounded at the current strong point has basically no effect on the current of the second resonant mode. For the resonant current of the aforementioned third resonant mode, the third grounding point D3 is located at the current strong point of the third resonant mode, and the third grounding point D3 grounded at the current strong point has basically no effect on the current of the third resonant mode. The resonant currents of the first resonant mode and the fourth resonant mode are basically not distributed between the first open end E1 and the feeding point A, so the grounding of the third grounding point D3 has basically no effect on the resonant currents of the first resonant mode and the fourth resonant mode.

[0174] In this embodiment, a third grounding point D3 is set near the feeding point A of the radiator 10, and the third grounding point D3 is interconnected with the part of the middle plate that serves as the reference ground. This can prevent the radiator 10 from being suspended in the air compared to the middle plate and improve the overall strength of the frame without affecting the current distribution of the first resonance mode, the second resonance mode, the third resonance mode, and the fourth resonance mode.

[0175] In this embodiment, the first feed source 21 excites the first resonance mode supporting the first frequency band and the second resonance mode supporting the second frequency band on the first radiation section 11, the second radiation section 12, the third radiation section 13, and the parasitic radiation section 14, so that the radiator 10 can support the middle and high frequency bands and has high efficiency in the wide frequency band of the middle and high frequencies, for example, the B3 band, the B39 band, the B1 band, the B40 band, the B41 band, and the Wi-Fi 2.4G band; or the first feed source 21 excites the first resonance mode supporting the first frequency band, the third resonance mode of the third frequency band, and the fourth resonance mode of the fourth frequency band on the first radiation section 11, the second radiation section 12, the third radiation section 13, and the parasitic radiation section 14. For example, the first feed source 21 and the second feed source 22 can excite the radiator 10 to support the Wi-Fi 2.4G band, the Wi-Fi 5G band, and the N78 band.

[0176] See also Fig.23 , one feed source or multiple feed sources feed the radiator 10 from the feeding point A. The so-called one feed source means that the feed source only supports one type of signal, such as MHB / Wi-Fi2.4G / Wi-Fi5G / N78, etc., or a combiner 51 is used to combine signals of multiple frequency bands and then feed them to the feed source, such as Wi-Fi2.4+Wi-Fi5G, Wi-Fi2.4+N78, MHB+Wi-Fi5G, etc. The so-called multiple feed sources means that each feed source can realize the frequency band combination of the above-mentioned single feed source, which can be a single-band or multi-band combination, and then the two feed sources are fed to the radiator 10 through the same position. However, in actual application, it can be decided whether to use common spring sheet or separate spring sheet feeding according to the size of the structural space.

[0177] In Embodiment 1, the first feed 21 is a single feed, and the working bandwidth supported by the first feed 21 is 1.71-2.7 GHz, covering medium and high frequencies (LTE B3 / B39 / B1 / B40 / B41, and Wi-Fi 2.4G). The radiator 10 mainly includes a radiator 10 and a parasitic radiation section. The radiator 10 includes a second radiation section, a first radiation section and a third radiation section arranged in sequence, a first coupling gap between the second radiation section and the first radiation section, and a second coupling gap G2 between the third radiation section and the parasitic radiation section. In some cases, according to actual engineering requirements, it may be necessary to add a third grounding point D3 to the branch from the first coupling gap to the second coupling gap G2 to improve the structural strength. In Embodiment 1, the first feed 21 operates in the MHB frequency band. According to the current distribution, the position of the third grounding point D3 is as close to the side of the feed point A as possible to reduce the impact on the first feed 21. If the first feed source 21 needs to work in other frequency bands in different scenarios, in addition to adjusting the branch length from the first coupling gap to the second coupling gap G2, the position of the third grounding point D3 can also be adjusted. The main reason is that when the first feed source 21 works in different frequency bands, the current mode distributed on the radiator 10 is different, that is, the strong and weak points of the current are distributed differently. In order to reduce the influence of the third grounding point D3 on the current mode, the third grounding point D3 needs to be placed at the strong current point. In this case, when the first feed source 21 works at medium and high frequencies (whether medium or high frequency), the strong current points are close to the feed point A, so the third grounding point D3 is as close to the feed point A as possible.

[0178] The working mechanism of the first feed source 21 is that when the first feed source 21 is fed from the feeding point A, two modes can be excited near 1.8 GHz and 2.6 GHz. Excitation near 2.56 GHz (mode 2 has a higher resonant frequency) Figure 6 The current distribution shown in the figure shows that the current is concentrated in the section from the feeding point A to the first grounding point D1, and the currents at the branches at both ends of the first coupling slot are in-phase currents, which is a common mode. In addition, the first feed source 21 also excites a Fig.10 In the current distribution shown, the current energy is mainly concentrated from the feeding point A to the end of the second coupling slot G2, which is a quarter-wavelength resonant mode from the feeding point A to the slot. If there is a parasitic radiation section from the second coupling slot G2 to the second grounding point D2, the corresponding in-phase current can also be excited on the parasitic radiation section to form a common mode current with higher radiation efficiency. The coupling amount between the third radiation section and the parasitic radiation section can be achieved by adjusting the size of the second coupling slot G2. The coupling amount between the second radiation section and the first radiation section can be achieved by adjusting the size of the first coupling slot.

[0179] See also Fig.24 , Fig.24 yes Fig.11The S parameter curves of the first frequency band and the second frequency band of the first feed source 21 of the antenna assembly 100 are provided. It can be seen that the first feed source 21 excites the radiator 10 and the parasitic radiation section 14 in the supported frequency band with a large bandwidth, which can cover 1.7 to 2.7 GHz.

[0180] See also Fig.25 , Fig.25 yes Fig.11 The system efficiency curves of the first frequency band and the second frequency band where the first feed source 21 excites the radiator 10 and the parasitic radiation section 14 of the antenna assembly 100 are provided. It can be seen that the first frequency band and the second frequency band where the first feed source 21 excites the radiator 10 and the parasitic radiation section 14 cover 1.7 to 2.7 GHz, and the efficiency at 1.7 to 2.7 GHz is greater than -4dB. It shows that the first feed source 21 excites the radiator 10 and the parasitic radiation section 14 to have high efficiency in both the MHB full frequency band and the Wi-Fi 2.4G frequency band. The first feed source 21 can achieve a high efficiency of more than -3dB in MHB.

[0181] In this structure, the feeding point A of the first feed source 21 is close to one side of the second coupling gap G2, so the frequency of resonance 2 is higher than that of resonance 1. In practice, according to different requirements, the branch length can be adjusted to achieve different resonance frequencies.

[0182] Embodiment 2 is a dual-feed antenna, in which the first feed source 21 and the second feed source 22 are co-fed at the feed point A. The length from the feed point A to the first coupling slot is less than the length from the second coupling slot G2 to the second grounding point D2. The first feed source 21 can excite Wi-Fi 2.4G (third frequency band) and Wi-Fi 5G (first frequency band), and the second feed source 22 excites the N78 band (fourth frequency band). The current distribution of Wi-Fi 2.4G (third frequency band) is a half-wavelength mode from the first coupling slot to the second coupling slot G2, and the current mode of N78 (fourth frequency band) is a quarter-wavelength mode from the first coupling slot to the first grounding point D1. Wi-Fi 5G (first frequency band) is a common mode from the feed point A to the second grounding point D2 (if there is no parasitic radiation section from the gap to the second grounding point D2, it is a quarter-wavelength mode).

[0183] See also Fig.26 , Fig.26 yes Fig.23The first feed 21 and the second feed 22 of the provided antenna assembly 100 excite the S parameter curve of the supported frequency band where the radiator 10 is located. Among them, curve a1 is the S parameter curve of the first frequency band and the third frequency band where the first feed 21 excites the radiator 10. Curve a2 is the S parameter curve of the fourth frequency band where the second feed 22 excites the radiator 10. Curve a3 is the isolation curve between the first feed 21 and the second feed 22. It can be seen that the supported frequency band where the first feed 21 excites the radiator 10 has a large bandwidth, which can cover 1.7~2.7GHz, 3.3~3.8GHz and 5.1~5.8GHz.

[0184] See also Fig. 27 , Fig. 27 yes Fig.23 The first feed 21 and the second feed 22 of the provided antenna assembly 100 excite the efficiency curves of the supported frequency bands where the radiator 10 is located. Among them, curve a1 is the radiation efficiency curve of the first feed 21 excitation radiator 10 supporting the first frequency band and the third frequency band. Curve a2 is the total efficiency curve of the second feed 22 excitation radiator 10 supporting the fourth frequency band. Curve b1 is the system efficiency curve of the first feed 21 excitation radiator 10 supporting the first frequency band and the third frequency band. Curve b2 is the total efficiency curve of the second feed 22 excitation radiator 10 supporting the fourth frequency band. It can be seen that the efficiency of the first feed 21 and the second feed 22 excitation radiator 10 supporting the frequency bands covering 1.7 to 2.7 GHz and 3.3 to 3.8 GHz is greater than -4dB, and the efficiency at 5.1 to 5.8 GHz is greater than -6dB. This indicates that the first feed source 21 and the second feed source 22 excite the radiator 10 to have relatively high efficiency at 1.7-2.7 GHz, 3.3-3.8 GHz and 5.1-5.8 GHz.

[0185] The antenna assembly 100 provided in the present application covers a larger bandwidth by exciting a plurality of different resonant modes on the radiator 10 to meet the requirements of LTE B3 / B1 / B39 / B40 / B41 and Wi-Fi 2.4G / 5G bands, N78 bands, etc., and occupies a smaller space.

[0186] Embodiment three is a dual-fed antenna, with common spring feeding at feeding point A. The first feed source 21 can excite Wi-Fi 2.4G (third frequency band) and N78 (fourth frequency band). The RF signals of the Wi-Fi 2.4G band and the N78 band are combined into one signal through the combiner 51 after coming out of their respective chips. The second feed source 22 excites the Wi-Fi 5G band (first frequency band). Among them, the current distribution of Wi-Fi 2.4G (third frequency band) is a half-wavelength mode from the first coupling slot to the second coupling slot G2, and the current mode of N78 (fourth frequency band) is a quarter-wavelength mode from the second coupling slot G2 to the second grounding point D2. Wi-Fi 5G (first frequency band) is a common mode mode from feeding point A to the second grounding point D2 (if there is no parasitic radiation section from the gap to the second grounding point D2, it is a quarter-wavelength mode).

[0187] The frequency band combinations mentioned in the above cases can all be replaced with other combinations, and can be achieved by adjusting the antenna branch length and matching circuit.

[0188] The first grounding point D1 / the second grounding point D2 / the third grounding point D3 can be replaced by returning to ground through a matching circuit, and an LC circuit or a switch can be added for further tuning.

[0189] 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 radiator, comprising a first open end, a feeding point, a second open end, a third open end and a first grounding point, wherein a first coupling gap is formed between the second open end and the third open end; A first feed source, the first feed source is electrically connected to the feeding point; the first feed source is used to excite the radiator to form a first resonance mode supporting a first frequency band, the resonance current of the first resonance mode is mainly distributed between the feeding point and the first grounding point, the resonance current direction of the first resonance mode between the feeding point and the second opening end is the same as the resonance current direction between the third opening end and the first grounding point, and the first frequency band covers at least part of the medium and high frequency band or the ultra-high frequency band.

2. The antenna assembly according to claim 1, wherein: The distance between the feeding point and the second opening end is greater than or equal to the distance between the third opening end and the first grounding point.

3. The antenna assembly according to claim 1, wherein: The antenna assembly further includes a parasitic radiation section, the parasitic radiation section includes a fourth opening end and a second grounding point, and a second coupling gap is formed between the fourth opening end and the first opening end.

4. The antenna assembly according to claim 3, characterized in that The first feed source is also used to excite the radiator to form a second resonance mode supporting a second frequency band, the resonance current of the second resonance mode is mainly distributed between the feeding point and the second grounding point, and the second frequency band covers at least part of the medium and high frequency bands.

5. The antenna assembly according to claim 4, characterized in that The center frequency of the second frequency band is lower than the center frequency of the first frequency band; the direction of the resonant current of the second resonant mode between the feeding point and the first opening end is the same as the direction of the resonant current between the fourth opening end and the second grounding point.

6. The antenna assembly according to claim 5, characterized in that The length of the parasitic radiation section is less than or equal to the distance between the feeding point and the first opening end; The width of the second coupling slot is less than or equal to the width of the first coupling slot.

7. The antenna assembly according to claim 6, wherein: The first frequency band and the second frequency band form a continuous frequency band, and the continuous frequency band covers 1.71-2.7 GHz.

8. The antenna assembly according to any one of claims 1 to 3, characterized in that: The first feed source is also used to excite the first open end and the second open end to form a third resonance mode supporting a third frequency band.

9. The antenna assembly according to claim 8, wherein: The third resonance mode includes a 1 / 2 wavelength mode of the third frequency band.

10. The antenna assembly according to claim 8, wherein: The antenna assembly further comprises: Second feed source; A first matching circuit, the first matching circuit being electrically connected between the feeding point and the first feed source; and A second matching circuit, wherein the second matching circuit is electrically connected between the feeding point and the second feed source, and the distance between the feeding point and the second opening end is smaller than the distance between the feeding point and the first opening end; the second feed source is also used to excite a fourth resonant mode supporting a fourth frequency band from the fourth opening end to the second grounding point.

11. The antenna assembly according to claim 10, wherein: The fourth resonance mode includes a 1 / 4 wavelength mode of the fourth frequency band.

12. The antenna assembly according to claim 10, wherein: The first frequency band includes the Wi-Fi 5G frequency band, the third frequency band includes the Wi-Fi 2.4G frequency band, and the fourth frequency band includes the N78 frequency band.

13. The antenna assembly according to claim 10, wherein: The antenna assembly further comprises: A combiner, wherein a first sub-end of the combiner is electrically connected to the first feed source, a second sub-end of the combiner is electrically connected to the second feed source, and a third sub-end of the combiner is electrically connected to the feed point; a first RF front-end circuit, the first RF front-end circuit being electrically connected between the first feed source and the first sub-end of the combiner, and the first RF front-end circuit being used for amplifying the antenna signal of the third frequency band; A second RF front-end circuit, the second RF front-end circuit is electrically connected to the first feed source and the first matching circuit, and the second RF front-end circuit is used to amplify the antenna signal of the first frequency band.

14. The antenna assembly according to claim 10, wherein: The first matching circuit includes a first band-stop circuit, and the first band-stop circuit is a band-stop circuit of a fourth frequency band; and / or, The second matching circuit includes a second band-stop circuit and a first band-pass circuit, the second band-stop circuit is a band-stop circuit of the third frequency band, the first band-pass circuit is a band-pass circuit of the first frequency band, and the first band-pass circuit is grounded.

15. The antenna assembly according to claim 14, wherein: The first matching circuit includes a first matching element, one end of which is electrically connected to the feeding point, and the first band-resistance circuit includes a first band-resistance sub-element and a second band-resistance sub-element, one end of the first band-resistance sub-element is electrically connected to the other end of the first matching element, one end of the second band-resistance sub-element is electrically connected to the other end of the first matching element, and the other end of the first band-resistance sub-element and the other end of the second band-resistance sub-element are electrically connected to the first feed source.

16. The antenna assembly according to claim 15, wherein: The second matching circuit comprises a second matching element, a third matching element, a fourth matching element and a fifth matching element, one end of the second matching element is electrically connected to the feeding point, and the other end of the second matching element is grounded; The second band-resistance circuit comprises a third band-resistance sub-element and a fourth band-resistance sub-element, one end of the third band-resistance sub-element is electrically connected to one end of the second matching element, the other end of the third band-resistance sub-element is electrically connected to one end of the third matching element, one end of the fourth band-resistance sub-element is electrically connected to one end of the second matching element, and the other end of the fourth band-resistance sub-element is electrically connected to one end of the third matching element; One end of the fourth matching element is electrically connected to the other end of the third matching element, the other end of the fourth matching element is electrically connected to one end of the fifth matching element, and the other end of the fifth matching element is electrically connected to the second feed source; One end of the first band-pass circuit is electrically connected to the other end of the third matching element, and the other end of the first band-pass circuit is grounded.

17. The antenna assembly according to any one of claims 1 to 16, characterized in that: The radiator further includes a third grounding point, the third grounding point is located between the feeding point and the first opening end, and the distance between the third grounding point and the feeding point is smaller than the distance between the third grounding point and the first opening end.

18. An electronic device, characterized in that: The electronic device comprises the antenna assembly according to any one of claims 1 to 17.

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