Antenna assembly and electronic equipment

Abstract

The invention provides an antenna assembly and electronic equipment, the antenna assembly comprises a radiator, a first feed source, a first matching circuit, a second feed source and a second matching circuit, the radiator comprises a first opening end, a feeding point, a second opening end, a third opening end and a first grounding point, and a coupling gap is formed between the second opening end and the third opening end; the first matching circuit is electrically connected between the feeding point and the first feed source; the second matching circuit is electrically connected between the feeding point and the second feed source; the first feed source and the second feed source share the radiator, the first feed source is used for exciting the radiator to form at least two resonance modes to support medium and high frequency bands, the second feed source is used for exciting the radiator to form at least two resonance modes to support ultrahigh frequency bands, and the radiator can support the medium and high frequency bands and can also support the ultrahigh frequency bands. And a plurality of frequency bands can be covered in a limited space.

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, more and more frequency bands need to be supported on mobile phones and other electronic devices, and the combination of multiple transmitting and receiving antennas can improve data transmission efficiency. However, the space of electronic devices is limited. Therefore, how to flexibly design antennas that can cover multiple frequency bands in a limited space has become a technical problem that needs to be solved. Summary of the invention

[0003] The present application provides an antenna assembly capable of covering multiple frequency bands in a limited space 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 coupling gap is formed between the second open end and the third open end;

[0006] First feed source;

[0007] a first matching circuit, the first matching circuit being electrically connected between the feeding point and the first feed source;

[0008] Second feed source;

[0009] a second matching circuit, the second matching circuit being electrically connected between the feeding point and the second feed source;

[0010] The first feed source is used to excite the radiator to form at least two resonance modes to support medium and high frequency bands, and the second feed source is used to excite the radiator to form at least two resonance modes to support ultra-high frequency bands.

[0011] The present application designs an antenna assembly including a radiator, a first feed source, a first matching circuit, a second feed source, and a second matching circuit. The radiator includes a first open end, a feed point, a second open end, a third open end, and a first grounding point, and a coupling gap is between the second open end and the third open end; the first matching circuit is electrically connected between the feed point and the first feed source; the second matching circuit is electrically connected between the feed point and the second feed source; the first feed source and the second feed source share the radiator, the first feed source is used to excite the radiator to form at least two resonant modes to support medium and high frequency bands, and the second feed source is used to excite the radiator to form at least two resonant modes to support ultra-high frequency bands. The radiator can support both medium and high frequency bands and ultra-high frequency bands, and can cover multiple frequency bands in a limited space.

[0012] 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

[0013] 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.

[0014] Figure 1 It is a structural schematic diagram of an electronic device provided in an embodiment of the present application;

[0015] Figure 2 is a partial exploded schematic diagram of an electronic device provided in an embodiment of the present application;

[0016] Figure 3 It is a partial back view of the electronic device provided by the embodiment of the present application without the back cover;

[0017] Figure 4 This is a schematic diagram of the structure of the antenna assembly provided in the embodiment of the present application. Figure 1 ;

[0018] Figure 5 is a schematic diagram of current distribution in the first resonance mode provided in an embodiment of the present application;

[0019] Figure 6 The current distribution simulation of the first resonance mode provided in the embodiment of the present application is Figure 1 ;

[0020] Figure 7 The current distribution simulation of the first resonance mode provided in the embodiment of the present application is Figure 2 ;

[0021] Figure 8 This is a schematic diagram of the structure of the antenna assembly provided in the embodiment of the present application. Figure 2 ;

[0022] Fig. 9 This is a schematic diagram of the structure of the antenna assembly provided in the embodiment of the present application. Figure 3 ;

[0023] Fig.10 This is a schematic diagram of the structure of the antenna assembly provided in the embodiment of the present application. Figure 4 ;

[0024] Fig.11a This is a schematic diagram of the structure of the antenna assembly provided in the embodiment of the present application. Figure 5 ;

[0025] Fig.11b yes Fig.11a Current distribution simulation of the first resonant mode on the provided antenna assembly Figure 1 ;

[0026] Fig.11c yes Fig.11a Current distribution simulation of the first resonant mode on the provided antenna assembly Figure 2 ;

[0027] Fig.12 This is a schematic diagram of the structure of the antenna assembly provided in the embodiment of the present application. Figure 6 ;

[0028] Fig.13 is a schematic diagram of current distribution in the second resonance mode provided in an embodiment of the present application;

[0029] Fig.14 The current distribution simulation of the second resonance mode provided in the embodiment of the present application is Figure 1 ;

[0030] Fig.15 The current distribution simulation of the second resonance mode provided in the embodiment of the present application is Figure 2 ;

[0031] Fig.16 is a schematic diagram of current distribution in the third resonance mode provided in an embodiment of the present application;

[0032] Fig.17 The current distribution simulation of the third resonance mode provided in the embodiment of the present application is Figure 1 ;

[0033] Fig.18 The current distribution simulation of the third resonance mode provided in the embodiment of the present application is Figure 2 ;

[0034] Fig.19 is a schematic diagram of current distribution of the fourth resonance mode provided in an embodiment of the present application;

[0035] Fig. 20 The current distribution simulation of the fourth resonance mode provided in the embodiment of the present application is Figure 1 ;

[0036] Fig.21 The current distribution simulation of the fourth resonance mode provided in the embodiment of the present application is Figure 2 ;

[0037] Fig. 22 is a schematic diagram of current distribution of the fifth resonance mode provided in an embodiment of the present application;

[0038] Fig.23 The current distribution simulation of the fifth resonance mode provided in the embodiment of the present application is Figure 1 ;

[0039] Fig.24 The current distribution simulation of the fifth resonance mode provided in the embodiment of the present application is Figure 2 ;

[0040] Fig.25 This is a schematic diagram of the structure of the antenna assembly provided in the embodiment of the present application. Figure 7 ;

[0041] Fig.26 This is a schematic diagram of the structure of the antenna assembly provided in the embodiment of the present application. Figure 8 ;

[0042] Fig. 27 is a schematic structural diagram of a first matching circuit provided in an embodiment of the present application;

[0043] Fig.28 is a schematic structural diagram of a second matching circuit provided in an embodiment of the present application;

[0044] Fig.29 yes Fig.26 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;

[0045] Fig.30 yes Fig.26 The efficiency curve of the supported frequency band where the first feed source and the second feed source of the provided antenna assembly excite the radiator;

[0046] Fig.31 yes Fig.11a 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

[0047] 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.

[0048] 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.

[0049] 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.

[0050] 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.

[0051] See also Figure 2 , Figure 2 1 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.

[0052] See also Figure 3 , Figure 3It 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.

[0053] 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.

[0054] 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 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.

[0055] The specific structure of the antenna assembly 100 provided in the first embodiment is described below with reference to the accompanying drawings.

[0056] See also Figure 3 and Figure 4 The antenna assembly 100 includes a radiator 10, a first feed source 21, a first matching circuit M1, a second feed source 22 and a second matching circuit M2.

[0057] 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.

[0058] 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.

[0059] 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 .

[0060] 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.

[0061] The open end in this application refers to an end that is disconnected from other conductive parts on the frame 320 by an insulating gap 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 insulating gap is filled with insulating material.

[0062] 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.

[0063] 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.

[0064] See also Figure 4 , a coupling gap G1 is formed between the second opening end E2 and the third opening end E3. In other words, a coupling gap G1 is formed between the first radiation section 11 and the second radiation section 12.

[0065] The coupling gap G1 is an insulating gap, and the width of the 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 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 coupling gap G1. "Capacitive coupling" means that the 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.

[0066] See also Figure 4 , the first matching circuit M1 is electrically connected between the feeding point A and the first feed source 21.

[0067] 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 .

[0068] 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.

[0069] 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.

[0070] 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.

[0071] See also Figure 4 , the second matching circuit M2 is electrically connected between the feeding point A and the second feed source 22.

[0072] See also Figure 4 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.

[0073] See also Figure 4 , the second matching circuit M2 is electrically connected to the feeding point A. The electrical connection described in the present application includes a direct electrical connection between two structures, or an indirect electrical connection through other components. In this embodiment, the second matching circuit M2 is indirectly electrically connected to the feeding point A through a radio frequency transmission line, a feeding spring, etc.

[0074] 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.

[0075] 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.

[0076] The first feed source 21 is used to excite the radiator 10 to form at least two resonance modes to support medium and high frequency bands.

[0077] 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.

[0078] 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.

[0079] 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.

[0080] The second feed source 22 is used to excite the radiator 10 to form at least two resonance modes to support an ultra-high frequency band.

[0081] Specifically, the second feed source 22 can at least provide an ultra-high frequency band. The second feed source 22 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 second feed source 22, at least two concave troughs can be formed on the radiator 10 in the ultra-high frequency band. Each resonant mode corresponds to a concave trough.

[0082] It can be seen from the efficiency curve that under the excitation of the second feed source 22, the efficiency of the radiator 10 in part or all of the ultra-high frequency band is greater than the second preset efficiency (i.e., has a better efficiency). The second preset efficiency is not specifically limited in this application. For example, the second preset efficiency is -4dB.

[0083] Optionally, the UHF band includes part of the 5.1-5.8 GHz band (such as the Wi-Fi 5G band, etc.) or all of the band. Optionally, the UHF band includes at least one of 4.8-4.9 GHz (such as N79), 3.3 GHz-3.8 GHz (such as N78), and 3.3 GHz-4.2 GHz (such as N77).

[0084] The present application designs an antenna assembly 100 including a radiator 10, a first feed source 21, a first matching circuit M1, a second feed source 22, and a second matching circuit M2. The radiator 10 includes a first open end E1, a feed point A, a second open end E2, a third open end E3, and a first grounding point D1. A coupling gap G1 is provided between the second open end E2 and the third open end E3. The first matching circuit M1 is electrically connected between the feed point A and the first feed source 21. The second matching circuit M2 is electrically connected between the feed point A and the second feed source 22. The first feed source 21 and the second feed source 22 share the radiator 10. 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. The second feed source 22 is used to excite the radiator 10 to form at least two resonant modes to support ultra-high frequency bands. The radiator 10 can support both medium and high frequency bands and ultra-high frequency bands, and can cover multiple frequency bands in a limited space.

[0085] Optional, see Figure 5 The first feed source 21 is used to excite the radiator 10 to form a first resonance mode supporting a first frequency band. The branch resonance current of the first resonance mode is mainly distributed between the feed point A and the first grounding point D1 (i.e., on the first radiation section 11 and the second radiation section 12). The first frequency band covers at least part of the medium and high frequency bands.

[0086] 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 1.8 GHz. Of course, the resonant frequency of the first frequency band can also be other frequencies.

[0087] Further optionally, in the first resonant mode, the direction of the current between the feed point A and the second open end E2 (the first radiation section 11) is the same as the direction of the current 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, and 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.

[0088] 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 grounding point D1.

[0089] 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 .

[0090] See also Figure 7 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 7 The red area in the graph indicates that the current intensity is stronger.

[0091] See also Figure 7 , the area near the second opening end E2 and the area near the third opening end E3 is a weak current area. Figure 7 The green area in the figure indicates that the current intensity is weaker.

[0092] In an alternative implementation, see Figure 8 , a distance h1 between the first ground point D1 and the third open end E3 is less than or equal to a distance h2 between the second open end E2 and the feeding point A. In other words, the length of the first radiation section 11 is greater than the length of the second radiation section 12 .

[0093] 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.

[0094] 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 phase with the first radiation segment 11 on the second radiation segment 12, thereby avoiding or reducing the generation of a 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.

[0095] For further optional information, see Fig. 9, the width of the coupling gap G1 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 coupling gap G1 is less than or equal to 1mm. Further optionally, the first preset width is 0.9mm, so that the width of the coupling gap G1 is less than or equal to 0.9mm. Further optionally, the first preset width is 0.8mm, so that the width of the coupling gap G1 is less than or equal to 0.8mm. Further optionally, the first preset width is 0.7mm, so that the width of the coupling gap G1 is less than or equal to 0.7mm. Further optionally, the first preset width is 0.6mm, so that the width of the coupling gap G1 is less than or equal to 0.6mm. Further optionally, the first preset width is 0.5mm, so that the width of the coupling gap G1 is less than or equal to 0.5mm.

[0096] In the present embodiment, the width of the coupling gap G1 is set to be smaller to increase the coupling capacitance between the first radiation segment 11 and the second radiation segment 12, thereby increasing the intensity of the resonant current on the second radiation segment 12, which is beneficial for forming the same-phase current on the first radiation segment 11 and the second radiation segment 12, and the current directions on the first radiation segment 11 and the second radiation segment 12 are the same. In this way, when working in the first frequency band, the length of the same-direction current is increased, the radiation aperture is increased, and the efficiency is increased.

[0097] The coupling gap G1 is equivalent to a series capacitor between the first radiation segment 11 and the second radiation segment 12 to offset the inductance, which is conducive to forming a current in the second radiation segment 12 that is in phase with the first radiation segment 11.

[0098] In other embodiments, the width of the coupling gap G1 may be greater than the first preset width.

[0099] In an alternative implementation, see Fig.10 The radiator 10 further includes a first extending protrusion 101 connected to the second opening end E2. The extending direction of the first extending protrusion 101 intersects with the extending direction of the radiator 10.

[0100] Optionally, the first extending protrusion 101 and the second opening end E2 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 .

[0101] See also Fig.10 The radiator 10 further includes a second extending protrusion 102 connected to the third opening end E3. 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.

[0102] Optionally, the second extension protrusion 102 and the third opening end E3 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 .

[0103] Furthermore, the first extension protrusion 101 and the second extension protrusion 102 are also located on both sides of the coupling gap G1. The arrangement of the first extension protrusion 101 and the second extension protrusion 102 can further increase the area directly opposite to the coupling gap G1, which is also the coupling area, and further increase the coupling capacitance between the first radiation section 11 and the second radiation section 12, which is beneficial for coupling more resonant currents on the second radiation section 12, and for forming the same-phase currents on the first radiation section 11 and the second radiation section 12, and the current directions on the first radiation section 11 and the second radiation section 12 are the same. In this way, when working in the first frequency band, the length of the same-direction current increases, the radiation aperture increases, and the efficiency increases.

[0104] 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 coupling gap G1 can be increased with less space.

[0105] In other embodiments, the radiator 10 may not be provided with the first extending protrusion 101 and the second extending protrusion 102 .

[0106] The above embodiments may include at least the following situations: 1. The width of the 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 coupling gap G1. 2. The width of the 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 coupling gap G1 and a larger coupling area. 3. The width of the 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.

[0107] For further optional information, see Fig.11a, the radiator 10 further includes a fourth open end E4. The fourth open end E4 is located on the side of the first grounding point D1 away from the third open end E3. In other words, the radiator 10 further includes a fourth radiating section 14. The portion between the fourth open end E4 and the first grounding point D1 is the fourth radiating section 14, and the fourth radiating section 14 is interconnected with the second radiating section 12 as a whole.

[0108] See also Fig.11b and Fig.11c When the radiator 10 is provided with a fourth radiating section 14 , the resonant current of the first resonant mode is also distributed between the first grounding point D1 and the fourth opening end E4 .

[0109] Since in the first resonant mode, the first grounding point D1 is a current strong point, a part of the resonant current on the second radiation segment 12 is distributed in the fourth radiation segment 14, that is, the fourth radiation segment 14 is a current strong area near the first grounding point D1, and the area near the fourth opening end E4 is a current weak area. That is, the resonant current intensity on the fourth radiation segment 14 gradually weakens from the first grounding point D1 to the fourth opening end E4. Moreover, the current direction on the fourth radiation segment 14 is the same as the current direction on the second radiation segment 12. Therefore, the setting of the fourth radiation segment 14 can further increase the length of the same direction current, further increase the radiation aperture, and help to further improve the efficiency of the first frequency band. For example, increase the efficiency between 1.7 and 2.1 GHz, for example, increase the efficiency of the B3 band / B39 band / B1 band.

[0110] For further optional information, see Fig.12 The antenna assembly 100 further includes a switch unit 30. One end of the switch unit 30 is electrically connected to the fourth opening end E4, and the other end of the switch unit 30 is grounded.

[0111] When the switch unit 30 is in the on state, the fourth open end E4 is grounded, and both ends of the fourth radiation segment 14 are grounded. The resonant current of the first resonance mode is basically not distributed on the fourth radiation segment 14. The resonant current of the first resonance mode is distributed between the feeding point A and the first grounding point D1.

[0112] When the switch unit 30 is in the disconnected state, the fourth opening end E4 is disconnected from the reference ground system. As mentioned above, the resonant current of the first resonant mode is distributed between the feeding point A and the fourth opening end E4, further increasing the length of the same-direction current and further increasing the radiation aperture, which is conducive to further improving the efficiency of the first frequency band.

[0113] Optional, see Fig.13The first feed source 21 is used to excite the radiator 10 to form a second resonance mode supporting a second frequency band. The resonance current of the second resonance mode is mainly distributed between the third open end E3 and the first grounding point D1 (i.e., the second radiation section 12). The second 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 in the second frequency band. When the mid-high frequency band is 1.7 to 2.7 GHz, the second frequency band is a partial frequency band in the range of 1.7 to 2.7 GHz. For example, the resonant frequency of the second frequency band is 2.65 GHz. Of course, the resonant frequency of the second frequency band can also be other frequencies.

[0115] For further optional information, see Fig.13 and Fig.14 In the second resonance mode, a strong resonance current is formed between the third open end E3 and the first grounding point D1 (the second radiation section 12). In a certain phase, the resonance current on the second radiation section 12 can flow from the first grounding point D1 to the third open end E3.

[0116] In another phase, the resonant current on the second radiation section 12 can also flow from the third open end E3 to the first grounding point D1.

[0117] See also Fig.15 , the first grounding point D1 and the part near the first grounding point D1 are high current areas. Fig.15 The red area in the graph indicates that the current intensity is stronger.

[0118] See also Fig.15 , the third opening end E3 and the area near the third opening end E3 are weak current areas. Fig.15 The green area in the figure indicates that the current intensity is weaker.

[0119] The intensity of the resonant current of the second resonant mode on the second radiation section 12 is distributed from strong to weak.

[0120] Further optionally, the second resonant mode includes a 1 / 4 wavelength mode of the second frequency band. Specifically, the electrical length of the second radiation segment 12 is close to 1 / 4 wavelength of the second frequency band, so that the first feed source 21 excites the second radiation segment 12 to form a 1 / 4 wavelength current mode supporting the second frequency band, thereby improving the efficiency in the second frequency band.

[0121] 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 greater than the first frequency difference and less than the second frequency difference, thereby making the efficiency of the continuous frequency band formed by the first frequency band and the second frequency band better.

[0122] In this embodiment, the first feed source 21 excites the first radiation section 11 and the second radiation section 12 to form a first resonance mode supporting the first frequency band and a second resonance mode supporting the second frequency band, so that the efficiency is higher in a wider frequency band of medium and high frequencies.

[0123] Optional, see Fig.16 The first feed source 21 is used to excite the radiator 10 to form a third resonance mode supporting a third frequency band. The resonance current of the third resonance mode is mainly distributed between the first opening end E1 and the first grounding point D1. The third frequency band covers at least part of the high frequency band.

[0124] Specifically, the first feed source 21 can at least provide a radio frequency excitation signal in the third frequency band. When the high frequency band is 3.3 GHz to 3.8 GHz, the third frequency band is a partial frequency band in the range of 3.3 GHz to 3.8 GHz. For example, the resonant frequency of the third frequency band is 3.14 GHz. Of course, the resonant frequency of the third frequency band can also be other frequencies.

[0125] Further optionally, in the third resonance mode, a relatively strong resonance current is formed between the first open end E1 and the first grounding point D1 (the first radiation section 11 + the second radiation section 12 + the third radiation section 13 ).

[0126] The direction of the resonant current on the first radiation section 11 is the same as the direction of the resonant current on the third radiation section 13 , and the direction of the resonant current on the first radiation section 11 is opposite to the direction of the resonant current on the second radiation section 12 .

[0127] See also Fig.16 and Fig.17 , in one phase, optionally, the resonant current on the first radiation section 11 flows from the feeding point A to the second open end E2, the resonant current on the second radiation section 12 flows from the first grounding point D1 to the third open end E3, and the resonant current on the third radiation section 13 flows from the first open end E1 to the feeding point A. In another phase, optionally, the resonant current on the first radiation section 11 flows from the second open end E2 to the feeding point A, the resonant current on the second radiation section 12 flows from the third open end E3 to the first grounding point D1, and the resonant current on the third radiation section 13 flows from the feeding point A to the first open end E1.

[0128] See also Fig.18 The first grounding point D1 and the part near the first grounding point D1 are high current areas. The feeding point A and the part near the feeding point A are high current areas. Fig.18 The red area in the graph indicates that the current intensity is stronger.

[0129] See also Fig.18The third opening end E3 and the area near the third opening end E3 are weak current areas. The first opening end E1 and the area near the first opening end E1 are weak current areas. The second opening end E2 and the area near the second opening end E2 are weak current areas. For example Fig.18 The green area in the figure indicates that the current intensity is weaker.

[0130] In this embodiment, the first feed source 21 excites the first radiation section 11, the second radiation section 12, and the third radiation section 13 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, so that the radiator 10 can support the medium and high frequency bands and have higher efficiency in the wide frequency band of the medium and high frequencies; the radiator 10 can also support the high frequency band. For example, the first feed source 21 can excite the radiator 10 to support the full medium and high frequency bands and the high frequency band. For example, the first feed source 21 can excite the radiator 10 to support any one or more of the B3 band, the B39 band, the B1 band, the B40 band, the B41 band, and the Wi-Fi 2.4G band.

[0131] Optional, see Fig.19 The second feed source 22 is used to excite the radiator 10 to form a fourth resonance mode supporting a fourth frequency band. The resonance current of the fourth resonance mode is mainly distributed between the feeding point A and the first open end E1 (on the third radiation section 13). The fourth frequency band covers at least part of the ultra-high frequency band.

[0132] Specifically, the second feed source 22 can at least provide a radio frequency excitation signal in the fourth frequency band. For example, when the ultra-high frequency band is 5.1-5.8 GHz, the fourth frequency band is a partial frequency band in 5.1-5.8 GHz. The resonant frequency of the fourth frequency band is 5.18 GHz. Of course, the resonant frequency of the fourth frequency band can also be other frequencies.

[0133] Further optionally, in the fourth resonance mode, a relatively strong resonance current is formed between the feeding point A and the first open end E1 (the third radiation section 13 ).

[0134] See also Fig.19 and Fig. 20 , at a certain phase, the resonant current on the third radiation section 13 can flow from the first open end E1 to the feeding point A.

[0135] In another phase, the resonant current on the third radiation section 13 may flow from the feeding point A to the first open end E1. The resonant current of the fourth resonant mode is an in-phase current.

[0136] See also Fig.21 , the feeding point A and the part near the feeding point A are strong current areas. Fig.21The red area in the graph indicates that the current intensity is stronger.

[0137] See also Fig.21 , the first opening end E1 and the area near the first opening end E1 are weak current areas. Fig.21 The green area in the figure indicates that the current intensity is relatively weak. The resonant current intensity of the fourth resonant mode on the third radiation section 13 is distributed from strong to weak in the direction from the feeding point A to the first opening end E1.

[0138] Further optionally, the fourth resonance mode includes a 1 / 4 wavelength mode of the fourth frequency band. Specifically, the electrical length of the third radiation segment 13 is close to 1 / 4 wavelength of the fourth frequency band, so that the second feed source 22 excites the third radiation segment 13 to form a 1 / 4 wavelength current mode supporting the fourth frequency band, thereby improving the efficiency in the fourth frequency band.

[0139] Optional, see Fig. 22 The second feed source 22 is used to excite the radiator 10 to form a fifth resonance mode supporting a fifth frequency band. The resonance current of the fifth resonance mode is mainly distributed between the second opening end E2 and the first opening end E1 (the first radiation section 11+the third radiation section 13). The fifth frequency band covers at least part of the ultra-high frequency band.

[0140] Specifically, the second feed source 22 can at least provide a radio frequency excitation signal in the fifth frequency band. For example, when the ultra-high frequency band is 5.1-5.8 GHz, the fifth frequency band is a partial frequency band in 5.1-5.8 GHz. The resonant frequency of the fifth frequency band is 5.7 GHz. Of course, the resonant frequency of the fifth frequency band can also be other frequencies.

[0141] Further optionally, in the fifth resonance mode, a strong resonant 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). The resonant current on the first radiation section 11 + the third radiation section 13 has a current inversion point J. The directions on both sides of the current inversion point J are opposite.

[0142] See also Fig. 22 and Fig.23 , in a certain phase, part of the current flows from the first open end E1 to the current inversion point J, and the other part flows from the second open end E2 to the current inversion point J.

[0143] In another phase, a part of the current flows from the current inversion point J to the first open end E1, and another part of the current flows from the current inversion point J to the second open end E2.

[0144] See also Fig.24 , the second opening end E2 and the portion near the second opening end E2 are weak current areas. Fig.24 The green area in the figure indicates that the current intensity is weaker.

[0145] See also Fig.24 , the first opening end E1 and the area near the first opening end E1 are weak current areas. Fig.24 The green area in the figure indicates that the current intensity is weaker.

[0146] The current inversion point J and the area near the current inversion point J are weak current areas. Fig.24 The green area in the figure indicates that the current intensity is weaker.

[0147] The intensity of the resonant current of the fifth resonant mode on the first radiation segment 11 + the third radiation segment 13 is distributed in a direction from the second opening end E2 to the first opening end E1 in a weak-strong-weak-strong-weak manner.

[0148] Further optionally, the fifth resonance mode includes a 1-times wavelength mode of the fifth frequency band. Specifically, the electrical length of the third radiation segment 13 is close to 1-times wavelength of the fifth frequency band, so that the second feed source 22 excites the first radiation segment 11 + the third radiation segment 13 to form a 1-times wavelength current mode supporting the fifth frequency band, thereby improving the efficiency in the fifth frequency band.

[0149] Optionally, the resonant frequency of the fifth frequency band is greater than the resonant frequency of the fourth frequency band. The difference between the resonant frequency of the fifth frequency band and the resonant frequency of the fourth frequency band is greater than the third frequency difference and less than the fourth frequency difference (smaller), thereby making the efficiency of the continuous frequency band formed by the fourth frequency band and the fifth frequency band better.

[0150] In this embodiment, the second feed source 22 excites the first radiation segment 11, the second radiation segment 12 and the third radiation segment 13 to form a fourth resonance mode supporting the fourth frequency band and a fifth resonance mode supporting the fifth frequency band, so that the ultra-high frequency has higher efficiency within a wider frequency band.

[0151] In this embodiment, the first feed source 21 excites the first resonance mode supporting the first frequency band, the second resonance mode of the second frequency band, and the third resonance mode of the third frequency band on the first radiation section 11, the second radiation section 12, and the third radiation section 13, so that the radiator 10 can support the medium and high frequency bands and have higher efficiency in the wide frequency band of the medium and high frequencies; the radiator 10 can also support the high frequency band. For example, the first feed source 21 can excite the radiator 10 to support the full frequency band of the medium and high frequencies and the high frequency band. Furthermore, the second feed source 22 excites the first radiation section 11, the second radiation section 12, and the third radiation section 13 to form the fourth resonance mode supporting the fourth frequency band and the fifth resonance mode of the fifth frequency band, so that the radiator 10 can support the ultra-high frequency band and have higher efficiency in the wide frequency band of the ultra-high frequency. For example, the first feed source 21 and the second feed source 22 can excite the radiator 10 to support any one or more of the B3 band, B39 band, B1 band, B40 band, B41 band, Wi-Fi 2.4G band, and Wi-Fi 5G band.

[0152] Optional, see Fig.25 The antenna assembly 100 further includes a parasitic radiation section 15. The parasitic radiation section 15 includes a fifth opening end E5 and a second grounding point D2. Specifically, the two ends of the parasitic radiation section 15 are the fifth opening end E5 and the second grounding point D2.

[0153] An insulating gap G2 is formed between the fifth opening end E5 and the first opening end E1. When the radiator 10 and the parasitic radiation section 15 are both part of the frame 320, the insulating gap G2 is filled with an insulating medium to ensure the overall strength of the frame 320.

[0154] Further optionally, the length of the parasitic radiation section 15 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 15 is less than the length of the third radiation section 13, by setting the width of the insulating gap G2 to be less than or equal to the second preset width, the fifth opening end E5 and the first opening end E1 are coupled to each other, which is conducive to forming a higher frequency band than the fifth frequency band on the parasitic radiation section 15, and is conducive to improving the bandwidth and efficiency of the ultra-high frequency band.

[0155] 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 insulating 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 two of them.

[0156] Optionally, the second feed source 22 is used to excite the parasitic radiation section 15 to form a sixth resonance mode supporting a sixth frequency band. The sixth frequency band covers at least part of the ultra-high frequency band.

[0157] Specifically, the second feed source 22 can at least provide a radio frequency excitation signal in the sixth frequency band. When the mid-high frequency band is 5.1-5.8 GHz, the sixth frequency band is a partial frequency band in 5.1-5.8 GHz.

[0158] Further optionally, in the sixth resonance mode, a strong resonant current is formed between the fifth open end E5 and the second grounding point D2 (parasitic radiation section 15). In a certain phase, the resonant current on the parasitic radiation section 15 can flow from the second grounding point D2 to the fifth open end E5. In another phase, the resonant current on the parasitic radiation section 15 can also flow from the fifth open end E5 to the second grounding point D2.

[0159] The second grounding point D2 and the portion near the second grounding point D2 are high current areas.

[0160] The fifth opening end E5 and the area near the fifth opening end E5 are weak current areas.

[0161] The intensity of the resonant current of the sixth resonant mode on the parasitic radiation section 15 is distributed from strong to weak.

[0162] Further optionally, the sixth resonance mode includes a 1 / 4 wavelength mode of the sixth frequency band. Specifically, the electrical length of the parasitic radiation section 15 is close to 1 / 4 wavelength of the sixth frequency band, so that the second feed source 22 excites the parasitic radiation section 15 to form a 1 / 4 wavelength current mode supporting the sixth frequency band, thereby improving the efficiency in the sixth frequency band.

[0163] Optionally, the resonant frequency of the sixth frequency band is greater than the resonant frequency of the fifth frequency band. The difference between the resonant frequency of the sixth frequency band and the resonant frequency of the fifth frequency band is greater than the fifth frequency difference and less than the sixth frequency difference, thereby making the efficiency of the continuous frequency band formed by the fifth and sixth frequency bands better.

[0164] In this embodiment, the second feed 22 is used to excite the radiator 10 and the parasitic radiation section 15 to form a fourth resonance mode supporting the fourth frequency band, a fifth resonance mode of the fifth frequency band, and a sixth resonance mode of the sixth frequency band, so that the ultra-high frequency has a higher efficiency in a wider frequency band. Further, the first feed 21 excites the first resonance mode supporting the first frequency band, the second resonance mode of the second frequency band, and the third resonance mode of the third frequency band on the first radiation section 11, the second radiation section 12, and the third radiation section 13, so that the radiator 10 can support the medium and high frequency bands and has a higher efficiency in a wider frequency band of the medium and high frequencies; the radiator 10 can also support the high frequency band. For example, the first feed 21 and the second feed 22 can excite the radiator 10 to support any one or more of the B3 band, the B39 band, the B1 band, the B40 band, the B41 band, the Wi-Fi 2.4G band, and the Wi-Fi 5G band.

[0165] In another alternative embodiment, see Fig.26 The antenna assembly 100 further includes a parasitic radiation section 15. The parasitic radiation section 15 includes a fifth opening end E5 and a second grounding point D2. Specifically, the two ends of the parasitic radiation section 15 are the fifth opening end E5 and the second grounding point D2.

[0166] An insulating gap G2 is formed between the fifth opening end E5 and the first opening end E1. When the radiator 10 and the parasitic radiation section 15 are both part of the frame, the insulating gap G2 is filled with an insulating medium to ensure the overall strength of the frame.

[0167] The length of the parasitic radiation section 15 is greater than the distance between the feeding point A and the first opening end E1. At this time, the parasitic radiation section 15 is not conducive to improving the efficiency of the ultra-high frequency band. Thus, by setting the width of the insulating gap G2 to be greater than the third preset width, that is, by setting the width of the insulating gap G2 to be larger, the coupling between the parasitic radiation section 15 and the third radiation section 13 is reduced or avoided, thereby reducing or avoiding the influence of the parasitic radiation section 15 on the efficiency of the fourth and fifth frequency bands.

[0168] Optional, see Fig. 27 , the first matching circuit M1 includes a first bandpass circuit 41. One end of the first bandpass circuit 41 is grounded. The bandpass frequency band of the first bandpass circuit 41 covers the ultra-high frequency band. The first bandpass circuit 41 is used to conduct the ultra-high frequency band from the radiator 10 to the reference ground system 500 to avoid the influence of the ultra-high frequency band on the first feed source 21. Further optionally, the bandstop frequency band of the first bandpass circuit 41 covers the medium and high frequency bands to avoid the medium and high frequency bands being conducted to the reference ground system 500 through the first bandpass circuit 41.

[0169] Optional, see Fig.28 , the second matching circuit M2 includes a second bandpass circuit 42. The bandpass frequency band of the second bandpass circuit 42 covers the ultra-high frequency band and the bandstop frequency band of the second bandpass circuit 42 covers the medium and high frequency band. The second bandpass circuit 42 is used to block the medium and high frequency bands from the radiator 10 from being transmitted to the second feed source 22, so as to avoid the influence of the medium and high frequency bands on the second feed source 22.

[0170] The first band-pass circuit 41 includes components such as an inductor and / or a capacitor, and the second band-pass circuit 42 includes components such as an inductor and / or a capacitor.

[0171] In an alternative implementation, see Fig. 27 The first matching circuit M1 includes a first capacitor C1, a second capacitor C2, a first inductor L1 and a second inductor L2.

[0172] One end of the first capacitor C1 is electrically connected to the first feed source 21, the other end of the first capacitor C1 is electrically connected to one end of the second capacitor C2 and one end of the first inductor L1, the other end of the second capacitor C2 is electrically connected to one end of the second inductor L2, the other end of the second inductor L2 is grounded, and the other end of the first inductor L1 is electrically connected to the feeding point A.

[0173] The passband frequency band of the second capacitor C2 and the second inductor L2 covers the ultra-high frequency band. The first capacitor C1 and the first inductor L1 achieve impedance matching for the medium and high frequency bands.

[0174] Optionally, the first capacitor C1 is a small capacitor, for example, the capacitance value of the first capacitor C1 is 0.6pF, 0.7pF, 0.8pF, 0.9pF, 1pF, 1.1pF, 1.2pF, 1.3pF, 1.4pF, 1.5pF, 1.6pF, 1.7pF, 1.8pF. For example, the capacitance value of the first capacitor C1 is 0.9pF.

[0175] Optionally, the second capacitor C2 is a small capacitor, for example, the capacitance value of the second capacitor C2 is 0.1 pF, 0.2 pF, 0.3 pF, 0.4 pF, 0.5 pF. For example, the capacitance value of the second capacitor C2 is 0.3 pF.

[0176] Optionally, the first inductor L1 is a small inductor, for example, the inductance value of the first inductor L1 is 3nH, 3.1nH, 3.2nH, 3.3nH, 3.4nH, 3.5nH, 3.6nH, 3.7nH, 3.8nH, 3.9nH, 4nH. For example, the inductance value of the first inductor L1 is 3.6nH.

[0177] Optionally, the second inductor L2 is a small inductor, for example, the inductance value of the second inductor L2 is 4.1nH, 4.2nH, 4.3nH, 4.4nH, 4.5nH, 4.6nH, 4.7nH, 4.8nH, 4.9nH, 5nH. For example, the inductance value of the second inductor L2 is 4.7nH.

[0178] In an alternative implementation, see Fig.28 The second band-pass circuit 42 includes a third capacitor C3, a third inductor L3 and a fourth capacitor C4. One end of the third capacitor C3 is electrically connected to the second feed source 22, the other end of the third capacitor C3 is electrically connected to one end of the fourth capacitor C4 and one end of the third inductor L3, the other end of the fourth capacitor C4 is electrically connected to the feeding point A, and the other end of the third inductor L3 is grounded.

[0179] The third capacitor C3, the third inductor L3 and the fourth capacitor C4 are UHF high-pass circuits, which pass UHF and block medium and high frequencies, and also achieve impedance matching for transmitting and receiving UHF bands.

[0180] Optionally, the third capacitor C3 is a small capacitor, for example, the capacitance value of the third capacitor C3 is 0.3 pF, 0.4 pF, 0.5 pF, 0.6 pF, 0.7 pF, 0.8 pF, 0.9 pF, 1 pF. For example, the capacitance value of the third capacitor C3 is 0.7 pF.

[0181] Optionally, the fourth capacitor C4 is a small capacitor, for example, the capacitance value of the fourth capacitor C4 is 0.1 pF, 0.2 pF, 0.3 pF, 0.4 pF, or 0.5 pF. For example, the capacitance value of the fourth capacitor C4 is 0.3 pF.

[0182] Optionally, the third inductor L3 is a small inductor, for example, the inductance value of the third inductor L3 is 1.5nH, 1.6nH, 1.7nH, 1.8nH, 1.9nH, 2nH, 2.1nH, 2.3nH, 2.4nH, 2.5nH. For example, the inductance value of the first inductor L1 is 2nH.

[0183] See also Fig.26 The present application proposes an antenna assembly 100 , wherein a radiator 10 includes a first radiating section 11 , a second radiating section 12 , and a third radiating section 13 .

[0184] See also Fig.26The first radiation segment 11 and the second radiation segment 12 support an operating bandwidth of 1.71-2.7 GHz, covering medium and high frequencies (LTE B3 / B39 / B1 / B40 / B41, and Wi-Fi 2.4G). The third radiation segment 13 supports ultra-high frequencies (such as Wi-Fi 5G, 5.1-5.8 GHz). The first feed source 21 and the second feed source 22 adopt a feeding method of a split-feed common spring, and a common radiator 10 (the first radiation segment 11 and the third radiation segment 13), and the radiator 10 has multiple resonance modes.

[0185] The first feed source 21 feeds from the feeding point A and excites the current distribution of the first resonant mode near 1.8 GHz. The current is mainly concentrated from the feeding point A to the first grounding point D1, and the current of the first radiation section 11 and the second radiation section 12 are in-phase currents. The first resonant mode is a common mode.

[0186] The first feed source 21 also excites the current distribution of the second resonance mode near 2.65 GHz, and the current is mainly concentrated from the third open end E3 to the first grounding point D1. The second resonance mode is a quarter-wavelength resonance mode from the first grounding point D1 to the third open end E3.

[0187] The first feed source 21 also excites the current distribution of the third resonance mode near 3.14 GHz, the current is mainly concentrated from the first open end E1 to the first grounding point D1, and the currents on both sides of the coupling gap G1 are in anti-phase.

[0188] The second feed source 22 feeds from the feed point A, and excites the current distribution of the fourth resonance mode at around 5.18 GHz, the current is mainly concentrated from the feed point A to the first open end E1, and the current on the branch is the same phase current. The fourth resonance mode is a quarter wavelength resonance mode from the feed point A to the first open end E1.

[0189] The second feed source 22 can also excite the current distribution of the fifth resonance mode near 5.7 GHz, and the current is mainly concentrated in the region from the second opening end E2 to the first opening end E1 where there is a current inversion point J. The fifth resonance mode is a 1-times wavelength mode of this branch.

[0190] See also Fig.29 , Fig.29 yes Fig.26The first feed 21 and the second feed 22 of the antenna assembly 100 provide S parameter curves of the supported frequency band where the radiator 10 is excited. Curve a is the S parameter curve of the supported frequency band where the first feed 21 excites the radiator 10. Curve b is the S parameter curve of the supported frequency band where the second feed 22 excites the radiator 10. Curve c 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 to 2.7 GHz and 5.1 to 5.8 GHz.

[0191] See also Fig.30 , Fig.30 yes Fig.26 The efficiency curves of the supported frequency bands where the first feed 21 and the second feed 22 of the antenna assembly 100 are excited by the radiator 10 are provided. Among them, curve a is the radiation efficiency of the supported frequency band where the first feed 21 excites the radiator 10. Curve b is the total efficiency of the supported frequency band where the first feed 21 excites the radiator 10. Curve c is the radiation efficiency of the supported frequency band where the second feed 22 excites the radiator 10. Curve d is the total efficiency of the supported frequency band where the second feed 22 excites the radiator 10. It can be seen that the supported frequency bands where the first feed 21 and the second feed 22 excite the radiator 10 cover 1.7 to 2.7 GHz and 5.1 to 5.8 GHz, and the efficiency at 1.7 to 2.7 GHz is greater than -7.5 dB, and the efficiency at 5.1 to 5.8 GHz is greater than -4 dB. It shows that the first feed 21 and the second feed 22 excite the radiator 10 to have high efficiency at 1.7 to 2.7 GHz and 5.1 to 5.8 GHz.

[0192] For further information, see Fig.11a , the radiator 10 also includes a fourth radiating section 14. The radiator 10 is extended from the first grounding point D1 to the side away from the third opening end E3 to the fourth opening end E4. The length of the radiator 10 is lengthened, and the fourth opening end E4 is open-circuited without returning to the ground. The 1.8 GHz current can flow to the fourth opening end E4, increasing the effective radiation aperture of the antenna, and further improving the antenna efficiency.

[0193] See also Fig.31 , Fig.31 yes Fig.11aThe efficiency curves of the supported frequency bands where the first feed 21 and the second feed 22 of the antenna assembly 100 are excited by the radiator 10 are provided. Among them, curve a is the radiation efficiency of the supported frequency band where the first feed 21 excites the radiator 10. Curve b is the total efficiency of the supported frequency band where the first feed 21 excites the radiator 10. Curve c is the radiation efficiency of the supported frequency band where the second feed 22 excites the radiator 10. Curve d is the total efficiency of the supported frequency band where the second feed 22 excites the radiator 10. It can be seen that the supported frequency bands where the first feed 21 and the second feed 22 excite the radiator 10 cover 1.7 to 2.7 GHz and 5.1 to 5.8 GHz, and the efficiency at 1.7 to 2.7 GHz is greater than -7.5 dB, and the efficiency at 5.1 to 5.8 GHz is greater than -4 dB. It shows that the first feed 21 and the second feed 22 excite the radiator 10 to have high efficiency at 1.7 to 2.7 GHz and 5.1 to 5.8 GHz. In addition, the peak efficiency of the antenna in the B3 band is improved by 0.8dB.

[0194] The antenna assembly 100 provided in the present application covers a larger bandwidth by exciting at least 5 different resonant modes on the radiator 10 to meet the LTE B3 / B1 / B39 / B40 / B41 and Wi-Fi 2.4G / 5G frequency bands, and occupies a smaller space. Although the embodiments of the present application have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations on the present application. Ordinary technicians in this field can change, modify, replace and modify the above embodiments within the scope of the present application, and these improvements and modifications are also considered to be 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 coupling gap is formed between the second open end and the third open end; First feed source; a first matching circuit, the first matching circuit being electrically connected between the feeding point and the first feed source; Second feed source; and a second matching circuit, the second matching circuit being electrically connected between the feeding point and the second feed source; The first feed source is used to excite the radiator to form at least two resonance modes to support medium and high frequency bands, and the second feed source is used to excite the radiator to form at least two resonance modes to support ultra-high frequency bands.

2. The antenna assembly according to claim 1, wherein: 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 bands.

3. The antenna assembly according to claim 2, wherein: The direction of the current between the feeding point and the second open end is the same as the direction of the current between the third open end and the first grounding point.

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

5. The antenna assembly according to claim 1, wherein: The width of the coupling gap is less than or equal to a first preset width.

6. The antenna assembly according to claim 1, wherein: The radiator also includes a first extending protrusion connected to the second opening end, and the radiator also includes a second extending protrusion connected to the third opening end, the extending direction of the first extending protrusion intersects with the extending direction of the radiator, the extending direction of the second extending protrusion intersects with the extending direction of the radiator, and the first extending protrusion is opposite to the second extending protrusion and is arranged at intervals.

7. The antenna assembly according to claim 1, wherein: The first feed source is 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 third opening end and the first grounding point, and the second frequency band covers at least part of the medium and high frequency bands.

8. The antenna assembly according to claim 7, wherein: The second resonance mode includes a 1 / 4 wavelength mode of the second frequency band.

9. The antenna assembly according to claim 1, wherein: The first feed source is used to excite the radiator to form a third resonance mode supporting a third frequency band, the resonance current of the third resonance mode is mainly distributed between the first opening end and the first grounding point, and the third frequency band covers at least part of the high frequency band.

10. The antenna assembly according to claim 1, wherein: The second feed source is used to excite the radiator to form a fourth resonance mode supporting a fourth frequency band, the resonance current of the fourth resonance mode is mainly distributed between the feeding point and the first opening end, and the fourth frequency band covers at least part of the ultra-high frequency band.

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 1, wherein: The second feed source is used to excite the radiator to form a fifth resonance mode supporting a fifth frequency band, the resonance current of the fifth resonance mode is mainly distributed between the second opening end and the first opening end, and the fifth frequency band covers at least part of the ultra-high frequency band.

13. The antenna assembly according to claim 12, wherein: The fifth resonance mode includes a 1-time wavelength mode of the fifth frequency band.

14. The antenna assembly according to claim 2, wherein: The radiator further includes a fourth open end, and the fourth open end is located on a side of the first grounding point away from the third open end; The resonant current of the first resonant mode is also distributed between the first grounding point and the fourth open end.

15. The antenna assembly according to claim 14, wherein: The antenna assembly further comprises a switch unit, one end of the switch unit is electrically connected to the fourth open end, and the other end of the switch unit is grounded; When the switch unit is in a conducting state, the resonant current of the first resonant mode is distributed between the feeding point and the first grounding point; When the switch unit is in an off state, the resonant current of the first resonant mode is distributed between the feeding point and the fourth open end.

16. The antenna assembly according to any one of claims 1 to 15, characterized in that: The antenna assembly also includes a parasitic radiation section, which includes a fifth opening end and a second grounding point, and an insulating gap is between the fifth opening end and the first opening end; 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 insulating gap is less than or equal to a second preset width, and the fifth opening end and the first opening end are coupled to each other.

17. The antenna assembly according to claim 16, wherein: The second feed source is used to excite the parasitic radiation section to form a sixth resonance mode supporting a sixth frequency band, and the sixth frequency band covers at least a portion of the ultra-high frequency band.

18. The antenna assembly according to any one of claims 1 to 15 and 17, characterized in that: The antenna assembly also includes a parasitic radiation section, which includes a fifth opening end and a second grounding point, and an insulating gap is between the fifth opening end and the first opening end; the length of the parasitic radiation section is greater than the distance between the feeding point and the first opening end, and the width of the insulating gap is greater than a third preset width.

19. The antenna assembly according to any one of claims 1 to 15 and 17, characterized in that: The first matching circuit comprises a first bandpass circuit, one end of the first bandpass circuit is grounded, and a bandpass frequency band of the first bandpass circuit covers the ultra-high frequency band; and / or, The second matching circuit includes a second bandpass circuit, a bandpass frequency band of the second bandpass circuit covers the ultra-high frequency band, and a bandstop frequency band of the second bandpass circuit covers the medium-high frequency band.

20. The antenna assembly according to claim 19, wherein: The first matching circuit includes a first capacitor, a second capacitor, a first inductor and a second inductor, one end of the first capacitor is electrically connected to the first feed source, the other end of the first capacitor is electrically connected to one end of the second capacitor and one end of the first inductor, the other end of the second capacitor is electrically connected to one end of the second inductor, the other end of the second inductor is grounded, and the other end of the first inductor is electrically connected to the feeding point; the passband frequency band of the second capacitor and the second inductor covers the ultra-high frequency band; and / or, The second band-pass circuit includes a third capacitor, a third inductor and a fourth capacitor, one end of the third capacitor is electrically connected to the second feed source, the other end of the third capacitor is electrically connected to one end of the fourth capacitor and one end of the third inductor, the other end of the fourth capacitor is electrically connected to the feeding point, and the other end of the third inductor is grounded.

21. An electronic device, characterized in that: The electronic device comprises the antenna assembly according to any one of claims 1 to 20.

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