Antenna assembly and electronic device

Abstract

The application provides an antenna assembly and an electronic device, comprising a radiator, a first feed source, a first matching circuit, a second feed source, a second matching circuit, the radiator comprises a first open end, a feed point, a second open end, a third open end and a first ground point, and a coupling gap is formed 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 resonance modes to support a medium-high frequency band, and the second feed source is used to excite the radiator to form at least two resonance modes to support an ultra-high frequency band; the radiator can support the medium-high frequency band and the ultra-high frequency band, and can cover multiple frequency bands in a limited space.

Description

Technical Field

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

[0002] With the development of network technology, mobile phones and other electronic devices need to support an increasing number of frequency bands, and the combination of multiple transmit and receive antennas can improve data transmission efficiency. However, electronic devices have limited space. Therefore, how to flexibly design antennas that can cover multiple frequency bands within a limited space has become a technical problem that needs to be solved. Summary of the Invention

[0003] This application provides an antenna assembly capable of covering multiple frequency bands within a limited space, and an electronic device having the antenna assembly.

[0004] In a first aspect, an antenna assembly provided in an embodiment of this application includes:

[0005] The radiator includes a first open end, a feed point, a second open end, a third open end, and a first grounding point, with a coupling gap between the second open end and the third open end.

[0006] First feed source;

[0007] A first matching circuit is electrically connected between the feed point and the first feed source;

[0008] Second feed source;

[0009] A second matching circuit is electrically connected between the feed point and the second feed source;

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

[0011] This application designs an antenna assembly including a radiator, a first feed, a first matching circuit, a second feed, 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 ground point. A coupling gap exists between the second and third open ends. The first matching circuit is electrically connected between the feed point and the first feed. The second matching circuit is electrically connected between the feed point and the second feed. The first and second feeds share the radiator. The first feed is used to excite the radiator to form at least two resonant modes to support the mid-to-high frequency band, and the second feed is used to excite the radiator to form at least two resonant modes to support the ultra-high frequency band. The radiator can support both the mid-to-high frequency band and the ultra-high frequency band, and can cover multiple frequency bands within a limited space.

[0012] Secondly, this application provides an electronic device that includes the antenna assembly described in the first aspect. Attached Figure Description

[0013] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments will be briefly described below.

[0014] Figure 1 This is a schematic diagram of the structure of an electronic device provided in an embodiment of this application;

[0015] Figure 2 This is a partially exploded view of the electronic device provided in the embodiments of this application;

[0016] Figure 3 This is a partial rear view of the electronic device provided in this application embodiment with the back cover removed;

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

[0018] Figure 5 This is a schematic diagram of the current distribution in the first resonant mode provided in the embodiments of this application;

[0019] Figure 6 This is a simulation of the current distribution of the first resonant mode provided in the embodiments of this application. Figure 1 ;

[0020] Figure 7 This is a simulation of the current distribution of the first resonant mode provided in the embodiments of this application. Figure 2 ;

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

[0022] Figure 9 This is a schematic diagram of the antenna assembly provided in the embodiments of this application. Figure 3 ;

[0023] Figure 10 This is a schematic diagram of the antenna assembly provided in the embodiments of this application. Figure 4 ;

[0024] Figure 11a This is a schematic diagram of the antenna assembly provided in the embodiments of this application. Figure 5 ;

[0025] Figure 11b yes Figure 11a Simulation of current distribution in the first resonant mode on the provided antenna assembly Figure 1 ;

[0026] Figure 11c yes Figure 11a Simulation of current distribution in the first resonant mode on the provided antenna assembly Figure 2 ;

[0027] Figure 12 This is a schematic diagram of the antenna assembly provided in the embodiments of this application. Figure 6 ;

[0028] Figure 13 This is a schematic diagram of the current distribution in the second resonant mode provided in the embodiments of this application;

[0029] Figure 14 This is a simulation of the current distribution in the second resonant mode provided in the embodiments of this application. Figure 1 ;

[0030] Figure 15 This is a simulation of the current distribution in the second resonant mode provided in the embodiments of this application. Figure 2 ;

[0031] Figure 16 This is a schematic diagram of the current distribution in the third resonant mode provided in the embodiments of this application;

[0032] Figure 17 This is a simulation of the current distribution in the third resonant mode provided in the embodiments of this application. Figure 1 ;

[0033] Figure 18 This is a simulation of the current distribution in the third resonant mode provided in the embodiments of this application. Figure 2 ;

[0034] Figure 19 This is a schematic diagram of the current distribution in the fourth resonant mode provided in the embodiments of this application;

[0035] Figure 20 This is a simulation of the current distribution of the fourth resonant mode provided in the embodiments of this application. Figure 1 ;

[0036] Figure 21 This is a simulation of the current distribution of the fourth resonant mode provided in the embodiments of this application. Figure 2 ;

[0037] Figure 22 This is a schematic diagram of the current distribution in the fifth resonant mode provided in the embodiments of this application;

[0038] Figure 23 This is a simulation of the current distribution of the fifth resonant mode provided in the embodiments of this application. Figure 1 ;

[0039] Figure 24 This is a simulation of the current distribution of the fifth resonant mode provided in the embodiments of this application. Figure 2 ;

[0040] Figure 25 This is a schematic diagram of the antenna assembly provided in the embodiments of this application. Figure 7 ;

[0041] Figure 26 This is a schematic diagram of the antenna assembly provided in the embodiments of this application. Figure 8 ;

[0042] Figure 27 This is a schematic diagram of the structure of the first matching circuit provided in an embodiment of this application;

[0043] Figure 28 This is a schematic diagram of the structure of the second matching circuit provided in the embodiments of this application;

[0044] Figure 29 yes Figure 26 The S-parameter curves of the first and second feed excitation radiators of the provided antenna assembly in the supported frequency band;

[0045] Figure 30 yes Figure 26 Efficiency curves of the first and second feed excitation radiators of the provided antenna assembly in the supported frequency band;

[0046] Figure 31 yes Figure 11a Efficiency curves of the first and second feed excitation radiators of the provided antenna assembly in the supported frequency band. Detailed Implementation

[0047] The technical solution of this application will now be clearly and completely described with reference to the accompanying drawings. Obviously, the embodiments described in this application are only a part of the embodiments, and not all of the embodiments. All other embodiments obtained by those skilled in the art based on the embodiments provided in this application without creative effort are within the protection scope of this application.

[0048] In this application, the reference to "embodiment" means that a specific feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor is it a mutually exclusive, independent, or alternative embodiment to other embodiments. It will 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, claims, and accompanying drawings of this application are used to distinguish different objects, not to describe a particular order. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion. For example, an assembly or device comprising one or more components is not limited to the one or more components listed, but may optionally also include one or more components not listed but inherent to the exemplified product, or one or more components that it should have based on the described function.

[0050] Please see Figure 1 , Figure 1 This is a schematic diagram of the structure of an electronic device 1000 provided in an embodiment of this application. The electronic device 1000 includes, but is not limited to, devices with communication functions such as mobile phones, tablets, laptops, computers, wearable devices, drones, robots, and digital cameras. This embodiment uses a mobile phone as an example for illustration; other electronic devices can refer to this embodiment.

[0051] Please see Figure 2 , Figure 2 This is a partially exploded view of the electronic device 1000 provided in this application embodiment. Taking a mobile phone as an example, the working environment of the antenna assembly 100 is illustrated. The electronic device 1000 includes a display screen 200, a mid-frame 300, and a back cover 400 arranged sequentially along its thickness direction. The mid-frame 300 includes a mid-plate 310 and a frame 320 surrounding the mid-plate 310. The frame 320 is a conductive frame, such as a metal frame. Receiving spaces are formed between the display screen 200 and the mid-plate 310, and between the mid-plate 310 and the back cover 400, to accommodate the motherboard 600, camera module, receiver module, battery 700, sub-board 800, and various sensors, etc. One side of the frame 320 along the thickness direction surrounds the edge of the display screen 200, and the other side of the frame 320 along the thickness direction surrounds the edge of the back cover 400, forming the complete external structure of the electronic device 1000. In this embodiment, the frame 320 and the middle plate 310 are an integral structure, while the frame 320 and the back cover 400 are separate structures. The above describes the working environment of the antenna assembly 100 using a mobile phone as an example, but the antenna assembly 100 of this application is not limited to the above working environment.

[0052] Please see Figure 3 , Figure 3This is a partial rear view of the electronic device 1000 provided in this application embodiment without the back cover 400. The frame 320 includes a top frame 321 and a bottom frame 324 disposed opposite to each other, and a first side frame 322 and a second side frame 323 connected to the top frame 321 and the bottom frame 324. The top frame 321 is the side away from the ground when the user holds and uses the electronic device 1000 in portrait mode, and the bottom frame 324 is the side facing the ground when the user holds and uses the electronic device 1000 in portrait mode. The first side frame 322 is the left side when the user holds and uses the electronic device 1000 in portrait mode. The second side frame 323 is the right side when the user holds and uses the electronic device 1000 in portrait mode. Alternatively, the first side frame 322 can also be the right side when the user holds and uses the electronic device 1000, and the second side frame 323 can be the left side when the user holds and uses the electronic device 1000.

[0053] Optionally, the top border 321 is a straight border, and both the first side border 322 and the second side border 323 have straight borders in the middle and curved borders at both ends. The curvature angles of the curved borders at both ends of the first side border 322 are close to or equal to 90°. The curvature angles of the curved borders at both ends of the second side border 323 are also close to or equal to 90°. The curved borders are rounded. The bottom border 324 is a straight border.

[0054] Please see Figure 2 The electronic device 1000 also includes a reference ground system 500. The reference ground system 500 is located within the frame 320. The reference ground system 500 is generally rectangular in shape. Because various slots and holes are provided on the reference ground edge of the reference ground system 500 as needed to accommodate components or avoid other structures in the mobile phone, the reference ground system 500 includes, but is not limited to, the metal alloy portion of the middle plate 310 and the reference ground metal portion of the circuit board (including the main board 600 and the sub-board 800). In general, the reference ground system in the electronic device 1000 can be considered equivalent to a roughly rectangular shape, hence the name reference ground system 500. However, the reference ground system 500 does not imply that the reference ground is plate-shaped or a rectangular plate.

[0055] The specific structure of the antenna assembly 100 provided in Embodiment 1 will be illustrated below with reference to the accompanying drawings.

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

[0057] This application does not specifically limit the material of the radiator 10. Optionally, the radiator 10 may be made of a conductive material, including but not limited to conductive materials such as metals and alloys. This application does not specifically limit the shape of the radiator 10. For example, the shape of the radiator 10 may include, but is not limited to, strip-shaped, sheet-shaped, rod-shaped, coated, or thin-film-shaped. Figure 3 The radiator 10 shown is merely an example and does not limit the shape of the radiator 10 provided in this application. In this embodiment, the radiator 10 is strip-shaped. This application does not limit the extension trajectory of the radiator 10. Optionally, the radiator 10 can extend along a straight line, a curve, or a bend. The radiator 10 described above can be a line of uniform width on its extension trajectory, or it can be a strip of varying width, such as one with a gradually changing width or a widened region.

[0058] This 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 within or on the surface of the frame 320, a flexible circuit board antenna formed on a flexible printed circuit board (FPC), a laser-directly formed antenna (LDS), a printed-directly formed antenna (PDS), a conductive sheet antenna (e.g., a metal bracket antenna), etc. In this embodiment, the radiator 10 is taken as part of the metal frame 320 of the electronic device 1000.

[0059] This application does not limit the location of the radiator 10 to any one of the top frame 321, bottom frame 324, first side frame 322, and second side frame 323. In this embodiment, the radiator 10 is located on the first side frame 322 near the top frame 321.

[0060] Please see Figure 3 and Figure 4 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.

[0061] The open end mentioned in this application refers to the end that is disconnected from other conductive parts on the frame 320 through an insulating gap and is also disconnected from the reference ground system 500. To ensure the structural strength of the frame 320 of the electronic device 1000, the aforementioned insulating gap is filled with insulating material.

[0062] The grounding point described in this application is electrically connected to the reference ground system 500. The electrical connection method includes, but is not limited to, the grounding point returning to ground through a grounding spring; or, the grounding point and the reference ground system 500 are interconnected as one unit, that is, through a physical return to ground method.

[0063] Please see Figure 4 The portion between feed point A and the second open end E2 is defined as the first radiating segment 11, and the portion between the third open end E3 and the first grounding point D1 is defined as the second radiating segment 12. The portion between feed point A and the first open end E1 is defined as the third radiating segment 13. The third radiating segment 13 and the first radiating segment 11 are interconnected as one unit.

[0064] Please see Figure 4 The second opening end E2 and the third opening end E3 are connected by a coupling gap G1. In other words, the first radiating segment 11 and the second radiating segment 12 are connected by a coupling gap G1.

[0065] The coupling gap G1 is an insulating break, and its width is 0.3–2 mm, but not limited to this size. The first radiating segment 11 and the second radiating segment 12 can achieve capacitive coupling through the coupling gap G1. Optionally, the first radiating segment 11 and the second radiating segment 12 can be considered 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 radiating segment 11 and the second radiating segment 12 generates an electric field, allowing the signal from the first radiating segment 11 to be transmitted to the second radiating segment 12 through the electric field, so that the first radiating segment 11 and the second radiating segment 12 can achieve electrical signal conduction even when they are not directly electrically connected.

[0066] Please see Figure 4 The first matching circuit M1 is electrically connected between the feed point A and the first feed source 21.

[0067] Optionally, the feed point A inside the frame 320 may be a bump protruding toward the reference ground system 500.

[0068] Please see Figure 4 The first matching circuit M1 is electrically connected between the first feed source 21 and the feed point A. The first matching circuit M1 includes at least one of a capacitor and an inductor. By adjusting the impedance matching between the port of the first feed source 21 (the aforementioned feed port) and the port of the radiator 10, the first matching circuit M1 facilitates the first feed source 21 to excite a first resonant mode on the radiator 10.

[0069] Please see Figure 4The first matching circuit M1 is electrically connected to the feed point A. The electrical connection described in this application includes a direct electrical connection between two structures, or an indirect electrical connection through other components. In this embodiment, the first matching circuit M1 and the feed point A are indirectly electrically connected through radio frequency transmission lines, feed springs, etc.

[0070] The first feed source 21 includes, but is not limited to, radio frequency transceiver chips, radio frequency front-end circuits, etc. The first feed source 21 is electrically connected to the first matching circuit M1, including but not limited to radio frequency transmission lines.

[0071] Please see Figure 4 The second matching circuit M2 is electrically connected between the feed point A and the second feed source 22.

[0072] Please see Figure 4 The second matching circuit M2 is electrically connected between the second feed source 22 and the feed point A. The second matching circuit M2 includes at least one of a capacitor and an inductor. By adjusting the impedance matching between the port of the second feed source 22 (the aforementioned feed port) and the port of the radiator 10, the second matching circuit M2 facilitates the second feed source 22 to excite a second resonant mode on the radiator 10.

[0073] Please see Figure 4 The second matching circuit M2 is electrically connected to the feed point A. The electrical connection described in this application includes a direct electrical connection between two structures, or an indirect electrical connection via other components. In this embodiment, the second matching circuit M2 and the feed point A are indirectly electrically connected via radio frequency transmission lines, feed springs, etc.

[0074] The second feed source 22 includes, but is not limited to, radio frequency transceiver chips, radio frequency front-end circuits, etc. The second feed source 22 is electrically connected to the second matching circuit M2, including but not limited to radio frequency transmission lines.

[0075] Optionally, both the first feed 21 and the second feed 22 excite the radiator 10. Therefore, the first feed 21 and the second feed 22 share a single radiator 10 to improve the utilization rate of the radiator 10. The radiator 10 occupies a small space but can support a relatively large number of frequency bands.

[0076] The first feed source 21 is used to excite the radiator 10 to form at least two resonant modes to support the mid-to-high frequency band.

[0077] Specifically, the first feed 21 can provide at least the mid-to-high frequency band. The first feed 21 can excite at least two resonant modes to form on the radiator 10. As can be seen from the S11 reflection curve, under the excitation of the first feed 21, at least two concave troughs can be formed on the radiator 10 in the mid-to-high frequency band. Each resonant mode corresponds to one concave trough.

[0078] As can be seen from the efficiency curve, under the excitation of the first feed source 21, the radiator 10 can achieve an efficiency greater than the first preset efficiency (i.e., better efficiency) in some or all frequency bands of the mid-to-high frequency band. This application does not specifically limit the first preset efficiency. For example, the first preset efficiency is -7.5 dB.

[0079] The mid-to-high frequency bands include some or all of the 1.7–2.7 GHz bands (such as B3 / B39 / B1 / B40 / B41 / Wi-Fi 2.4G bands). Among them, the B3 / B39 / B1 / B40 / B41 bands can support 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 resonant modes to support the ultra-high frequency band.

[0081] Specifically, the second feed 22 can provide at least the ultra-high frequency band. The second feed 22 can excite at least two resonant modes to form on the radiator 10. As can be seen from the S11 reflection curve, under the excitation of the second feed 22, at least two concave troughs can be formed on the radiator 10 in the ultra-high frequency band. Each resonant mode corresponds to one concave trough.

[0082] As can be seen from the efficiency curve, under the excitation of the second feed 22, the radiator 10 can achieve an efficiency greater than the second preset efficiency (i.e., better efficiency) in some or all frequency bands of the UHF band. This application does not specify a particular second preset efficiency. For example, the second preset efficiency is -4dB.

[0083] Optionally, the UHF band includes a portion of the 5.1-5.8 GHz band (e.g., the Wi-Fi 5G band) or all of the band. Further, the UHF band includes at least one of the following: 4.8–4.9 GHz (e.g., N79), 3.3 GHz–3.8 GHz (e.g., N78), and 3.3 GHz–4.2 GHz (e.g., N77).

[0084] This application designs an antenna assembly 100 including a radiator 10, a first feed 21, a first matching circuit M1, a second feed 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 ground point D1. A coupling gap G1 is formed 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 21. The second matching circuit M2 is electrically connected between the feed point A and the second feed 22. The first feed 21 and the second feed 22 share the radiator 10. The first feed 21 is used to excite the radiator 10 to form at least two resonant modes to support the mid-to-high frequency band. The second feed 22 is used to excite the radiator 10 to form at least two resonant modes to support the ultra-high frequency band. The radiator 10 can support both the mid-to-high frequency band and the ultra-high frequency band, and can cover multiple frequency bands within a limited space.

[0085] Optional, please refer to Figure 5 The first feed source 21 is used to excite the radiator 10 to form a first resonant mode supporting the first frequency band. The stub resonant current of the first resonant mode is mainly distributed between the feed point A and the first ground point D1 (i.e., on the first radiation segment 11 and the second radiation segment 12). The first frequency band covers at least a portion of the mid-to-high frequency band.

[0086] Specifically, the first feed source 21 can provide at least a radio frequency excitation signal for a first frequency band. When the high frequency band is 1.7 to 2.7 GHz, the first frequency band is a portion of the 1.7 to 2.7 GHz band. 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] Optionally, in the first resonant mode, the current direction between the feed point A and the second open end E2 (first radiating segment 11) is the same as the current direction between the third open end E3 and the first ground point D1 (second radiating segment 12). Optionally, the current between the feed point A and the second open end E2 (first radiating segment 11) and the current between the third open end E3 and the first ground point D1 (second radiating segment 12) are in phase. In this case, the first resonant mode is the common-mode mode of the radiator 10. In the common-mode mode, currents in the same direction are formed on the first radiating segment 11 and the second radiating segment 12. Thus, in the first frequency band, the length of the current in the same direction increases, increasing the radiation aperture and thereby increasing efficiency.

[0088] Please see Figure 5 and Figure 6 At a certain phase, the resonant current (dashed arrow) on the radiator 10 can flow from the feed point A to the second open end E2, and from the third open end E3 to the first ground point D1.

[0089] In another phase, the resonant current on the radiator 10 can also flow from the first grounding point D1 to the third open end E3, and from the second open end E2 to the feed point A.

[0090] Please see Figure 7 The feed point A, and the portion between feed point A and the second opening end E2, but close to feed point A, is a high-current region. For example... Figure 7 The red area in the diagram indicates a stronger current intensity.

[0091] Please see Figure 7 The regions near the second opening end E2 and the third opening end E3 are weak current regions. For example... Figure 7 The green area in the diagram indicates a weaker current intensity.

[0092] In one alternative implementation, please refer to Figure 8 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 radiating segment 11 is greater than the length of the second radiating segment 12.

[0093] Optionally, the electrical length between the feed point A and the second opening end E2 is approximately one-quarter of the wavelength of the center frequency of the first frequency band, so as to form a one-quarter wavelength mode supporting the first frequency band between the feed point A and the second opening end E2 (on the first radiation segment 11). That is, the first resonant mode includes a one-quarter wavelength mode of the first frequency band, and the one-quarter wavelength mode is the fundamental mode, so as to achieve higher efficiency in the first frequency band.

[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 reverse current. In this way, in the first frequency band, the length of the current in phase increases, the radiation aperture increases, and thus the efficiency increases.

[0095] Further optional information can be found in [link to relevant documentation]. Figure 9The width of the coupling gap G1 is less than or equal to a first preset width. Optionally, this application does not specifically limit the first preset width. Optionally, the first preset width is 1mm, thus the width of the coupling gap G1 is less than or equal to 1mm. Further optionally, the first preset width is 0.9mm, thus the width of the coupling gap G1 is less than or equal to 0.9mm. Further optionally, the first preset width is 0.8mm, thus the width of the coupling gap G1 is less than or equal to 0.8mm. Further optionally, the first preset width is 0.7mm, thus the width of the coupling gap G1 is less than or equal to 0.7mm. Further optionally, the first preset width is 0.6mm, thus the width of the coupling gap G1 is less than or equal to 0.6mm. Further optionally, the first preset width is 0.5mm, thus the width of the coupling gap G1 is less than or equal to 0.5mm.

[0096] In this embodiment, by setting the coupling gap G1 to be smaller, the coupling capacitance between the first radiation segment 11 and the second radiation segment 12 is increased, thereby increasing the resonant current intensity on the second radiation segment 12. This facilitates the formation of in-phase currents 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. Thus, when operating in the first frequency band, the length of the in-phase current increases, increasing the radiation aperture and thereby increasing efficiency.

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

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

[0099] In one alternative implementation, please refer to Figure 10 The radiator 10 further includes a first extension protrusion 101 connected to the second opening end E2. The extension direction of the first extension protrusion 101 intersects with the extension direction of the radiator 10.

[0100] Optionally, the first extending protrusion 101 and the second opening end E2 are interconnected as a single 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] Please see Figure 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 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 extending protrusion 102 and the third opening end E3 are interconnected as a single structure. Further optionally, the extending direction of the second extending protrusion 102 may be perpendicular to the extending direction (length direction) of the radiator 10.

[0103] Furthermore, the first extended protrusion 101 and the second extended protrusion 102 are also located on both sides of the coupling gap G1. The arrangement of the first extended protrusion 101 and the second extended protrusion 102 can further increase the facing area of ​​the coupling gap G1, which is also the coupling area, thereby further increasing the coupling capacitance between the first radiating segment 11 and the second radiating segment 12. This facilitates the coupling of more resonant current on the second radiating segment 12, and facilitates the formation of in-phase currents on the first radiating segment 11 and the second radiating segment 12, and ensures that the current directions on the first radiating segment 11 and the second radiating segment 12 are the same. Thus, when operating in the first frequency band, the length of the in-phase current increases, increasing the radiation aperture and thereby increasing efficiency.

[0104] In other embodiments, the extension direction of the first extending protrusion 101 is inclined relative to the extension direction of the radiator 10, and the extension direction of the second extending protrusion 102 is also inclined relative to the extension direction of the radiator 10. The extension directions of the first extending protrusion 101 and the second extending protrusion 102 are parallel. Thus, 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 first extending protrusion 101 and the second extending protrusion 102 may not be provided on the radiator 10.

[0106] The above implementation methods can 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 radiator 10 does not have the first extending protrusion 101 and the second extending protrusion 102. The coupling capacitance is increased by setting a smaller coupling gap G1 width. 2. The width of the coupling gap G1 is less than or equal to the first preset width, and the radiator 10 has the first extending protrusion 101 and the second extending protrusion 102. The coupling capacitance is increased by setting a smaller coupling gap G1 width and a larger coupling area. 3. The width of the coupling gap G1 is greater than the first preset width, and the radiator 10 has the first extending protrusion 101 and the second extending protrusion 102. The coupling capacitance is increased by setting a larger coupling area.

[0107] Further optional information can be found in [link to relevant documentation]. Figure 11aThe 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 also includes a fourth radiating segment 14. The portion between the fourth open end E4 and the first grounding point D1 is the fourth radiating segment 14, and the fourth radiating segment 14 is interconnected with the second radiating segment 12.

[0108] Please see Figure 11b and Figure 11c When the radiator 10 is provided with a fourth radiating segment 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] In the first resonant mode, the first grounding point D1 is a high-current point, and a portion of the resonant current on the second radiation segment 12 is distributed in the fourth radiation segment 14. That is, the area near the first grounding point D1 in the fourth radiation segment 14 is a high-current region, while the area near the fourth opening end E4 is a low-current region. In other words, the resonant current intensity on the fourth radiation segment 14 gradually decreases from the first grounding point D1 to the fourth opening end E4. Furthermore, the current direction on the fourth radiation segment 14 is the same as the current direction on the second radiation segment 12. Therefore, the arrangement of the fourth radiation segment 14 can further increase the length of the current in the same direction, further increase the radiation aperture, and help further improve the efficiency of the first frequency band. For example, it can increase the efficiency between 1.7 and 2.1 GHz, or for example, increase the efficiency of the B3 / B39 / B1 bands.

[0110] Further optional information can be found in [link to relevant documentation]. Figure 12 The antenna assembly 100 further includes a switching unit 30. One end of the switching unit 30 is electrically connected to the fourth opening terminal E4, and the other end of the switching unit 30 is grounded.

[0111] When the switching unit 30 is in the ON state, the fourth open terminal E4 is grounded, and both ends of the fourth radiating segment 14 are grounded at this time. The resonant current of the first resonant mode is basically not distributed on the fourth radiating segment 14. The resonant current of the first resonant mode is distributed between the feed point A and the first grounding point D1.

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

[0113] Optional, please refer to Figure 13The first feed source 21 is used to excite the radiator 10 to form a second resonant mode supporting the second frequency band. The resonant current of the second resonant mode is mainly distributed between the third opening end E3 and the first grounding point D1 (i.e., the second radiation segment 12). The second frequency band covers at least a portion of the mid-to-high frequency band.

[0114] Specifically, the first feed source 21 can provide at least the radio frequency excitation signal for the second frequency band. When the high-frequency band is 1.7 to 2.7 GHz, the second frequency band is a portion of the 1.7 to 2.7 GHz band. 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] Further optional information can be found in [link to relevant documentation]. Figure 13 and Figure 14 In the second resonant mode, a strong resonant current is formed between the third open end E3 and the first grounding point D1 (the second radiation segment 12). At a certain phase, the resonant current on the second radiation segment 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 segment 12 can also flow from the third opening end E3 to the first grounding point D1.

[0117] Please see Figure 15 The first grounding point D1 and the area near it are high-current regions. For example... Figure 15 The red area in the diagram indicates a stronger current intensity.

[0118] Please see Figure 15 The region around the third opening terminal E3 is a weak current region. For example... Figure 15 The green area in the diagram indicates a weaker current intensity.

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

[0120] Optionally, the second resonant mode includes a quarter-wavelength mode of the second frequency band. Specifically, the electrical length of the second radiating segment 12 is close to one-quarter wavelength of the second frequency band, so that the first feed source 21 can excite the second radiating segment 12 to form a quarter-wavelength current mode supporting the second frequency band, thereby improving 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 but less than the second frequency difference, thereby making the efficiency of the continuous frequency band formed by the first and second frequency bands better.

[0122] This embodiment uses the first feed source 21 to excite the first radiation section 11 and the second radiation section 12 to form a first resonant mode supporting the first frequency band and a second resonant mode supporting the second frequency band, so that it has high efficiency in a wide frequency range of mid-to-high frequency.

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

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

[0125] Alternatively, in the third resonant mode, a strong resonant current is formed between the first open end E1 and the first grounding point D1 (first radiation segment 11 + second radiation segment 12 + third radiation segment 13).

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

[0127] Please see Figure 16 and Figure 17 In one phase, optionally, the resonant current on the first radiating segment 11 flows from the feed point A to the second open end E2, the resonant current on the second radiating segment 12 flows from the first ground point D1 to the third open end E3, and the resonant current on the third radiating segment 13 flows from the first open end E1 to the feed point A. In another phase, optionally, the resonant current on the first radiating segment 11 flows from the second open end E2 to the feed point A, the resonant current on the second radiating segment 12 flows from the third open end E3 to the first ground point D1, and the resonant current on the third radiating segment 13 flows from the feed point A to the first open end E1.

[0128] Please see Figure 18 The first grounding point D1 and the area near it are high-current regions. Similarly, the feed point A and the area near it are also high-current regions. For example... Figure 18 The red area in the diagram indicates a stronger current intensity.

[0129] Please see Figure 18The region around the third open end E3 is a weak current region. The region around the first open end E1 is a weak current region. The region around the second open end E2 is a weak current region. For example... Figure 18 The green area in the diagram indicates a weaker current intensity.

[0130] This embodiment uses the first feed source 21 to excite the first resonant mode supporting the first frequency band, the second resonant mode supporting the second frequency band, and the third resonant mode supporting the third frequency band on the first radiating segment 11, the second radiating segment 12, and the third radiating segment 13. This enables the radiator 10 to support the mid-to-high frequency band and has high efficiency over a relatively wide mid-to-high frequency range; 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 mid-to-high frequency band 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, B39 band, B1 band, B40 band, B41 band, and Wi-Fi 2.4G band.

[0131] Optional, please refer to Figure 19 The second feed source 22 is used to excite the radiator 10 to form a fourth resonant mode supporting the fourth frequency band. The resonant current of the fourth resonant mode is mainly distributed between the feed point A and the first opening end E1 (on the third radiation segment 13). The fourth frequency band covers at least a portion of the ultra-high frequency band.

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

[0133] Alternatively, in the fourth resonant mode, a strong resonant current is formed between the feed point A and the first opening end E1 (the third radiation segment 13).

[0134] Please see Figure 19 and Figure 20 At a certain phase, the resonant current on the third radiation segment 13 can flow from the first opening end E1 to the feed point A.

[0135] In another phase, the resonant current on the third radiation segment 13 can flow from the feed point A to the first opening end E1. The resonant current of the fourth resonant mode is an in-phase current.

[0136] Please see Figure 21 The feed point A and the area near feed point A are high-current regions. For example... Figure 21The red area in the diagram indicates a stronger current intensity.

[0137] Please see Figure 21 The first opening end E1 and the region near the first opening end E1 are weak current regions. For example... Figure 21 The green area in the diagram indicates a weaker current intensity. The resonant current intensity of the fourth resonant mode on the third radiation segment 13 shows a distribution from strong to weak from the feed point A to the first opening end E1.

[0138] Optionally, the fourth resonant mode includes a quarter-wavelength mode of the fourth frequency band. Specifically, the electrical length of the third radiating segment 13 is close to one-quarter wavelength of the fourth frequency band, so that the second feed source 22 can excite the third radiating segment 13 to form a current mode supporting the fourth frequency band, thereby improving efficiency in the fourth frequency band.

[0139] Optional, please refer to Figure 22 The second feed source 22 is used to excite the radiator 10 to form a fifth resonant mode supporting the fifth frequency band. The resonant current of the fifth resonant mode is mainly distributed between the second opening end E2 and the first opening end E1 (first radiating segment 11 + third radiating segment 13). The fifth frequency band covers at least a portion of the ultra-high frequency band.

[0140] Specifically, the second feed 22 can provide at least the radio frequency excitation signal for the fifth frequency band. For example, when the ultra-high frequency band is 5.1-5.8 GHz, the fifth frequency band is a portion of the 5.1-5.8 GHz band. 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] Optionally, in the fifth resonant mode, a strong resonant current is formed between the second open end E2 and the first open end E1 (first radiation segment 11 + third radiation segment 13). The resonant current on the first radiation segment 11 + third radiation segment 13 has a current reversal point J. The directions on both sides of the current reversal point J are opposite.

[0142] Please see Figure 22 and Figure 23 At a certain phase, part of the current flows from the first open end E1 to the current reversal point J, and the other part flows from the second open end E2 to the current reversal point J.

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

[0144] Please see Figure 24 The second opening end E2 and the area near the second opening end E2 are weak current regions. For example... Figure 24 The green area in the diagram indicates a weaker current intensity.

[0145] Please see Figure 24 The first opening end E1 and the region near the first opening end E1 are weak current regions. For example... Figure 24 The green area in the diagram indicates a weaker current intensity.

[0146] Among them, the current reversal point J and the region near the current reversal point J are weak current regions. For example Figure 24 The green area in the diagram indicates a weaker current intensity.

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

[0148] Optionally, the fifth resonant mode includes a wavelength-1 mode of the fifth frequency band. Specifically, the electrical length of the third radiating segment 13 is close to the wavelength of the fifth frequency band, so that the second feed source 22 can excite the first radiating segment 11 + the third radiating segment 13 to form a wavelength-1 current mode supporting the fifth frequency band, thereby improving 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 but less than the fourth frequency difference (smaller), thus making the efficiency of the continuous frequency band formed by the fourth and fifth frequency bands better.

[0150] This embodiment uses the second feed source 22 to excite the formation of a fourth resonant mode supporting the fourth frequency band and a fifth resonant mode supporting the fifth frequency band on the first radiation segment 11, the second radiation segment 12 and the third radiation segment 13, so that the UHF has high efficiency over a wide frequency range.

[0151] In this embodiment, the first feed source 21 excites the first radiating segment 11, the second radiating segment 12, and the third radiating segment 13 to form a first resonant mode supporting the first frequency band, a second resonant mode supporting the second frequency band, and a third resonant mode supporting the third frequency band. This enables the radiator 10 to support the mid-to-high frequency band and has high efficiency over a relatively wide mid-to-high frequency range. 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 entire mid-to-high frequency band and the high frequency band. Furthermore, the second feed source 22 excites the first radiating segment 11, the second radiating segment 12, and the third radiating segment 13 to form a fourth resonant mode supporting the fourth frequency band and a fifth resonant mode supporting the fifth frequency band. This enables the radiator 10 to support the ultra-high frequency band and has high efficiency over a relatively wide ultra-high frequency range. For example, the first feed 21 and the second feed 22 can excite the radiator 10 to support any one or more of the following frequency bands: B3, B39, B1, B40, B41, Wi-Fi 2.4G, and Wi-Fi 5G.

[0152] Optional, please refer to Figure 25 The antenna assembly 100 further includes a parasitic radiation section 15. The parasitic radiation section 15 includes a fifth open end E5 and a second grounding point D2. Specifically, the two ends of the parasitic radiation section 15 are the fifth open end E5 and the second grounding point D2, respectively.

[0153] The fifth opening end E5 and the first opening end E1 are connected by an insulating gap G2. When both the radiator 10 and the parasitic radiating segment 15 are 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] Optionally, the length of the parasitic radiation segment 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 segment 15 is less than the length of the third radiation segment 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 beneficial to forming a higher frequency band than the fifth frequency band on the parasitic radiation segment 15, and to improving the bandwidth and efficiency of the ultra-high frequency band.

[0155] This application does not specifically limit the size of the second preset width. Optionally, the second preset width is 2mm, and the width of the insulation break G2 is less than or equal to 2mm. Further optionally, the second preset width is any one or a value between two of 1.9mm, 1.8mm, 1.7mm, 1.6mm, 1.5mm, 1.4mm, 1.3mm, 1.2mm, 1.1mm, 1.0mm, 0.9mm, 0.8mm, 0.7mm, 0.6mm, and 0.5mm.

[0156] Optionally, the second feed source 22 is used to excite the formation of a sixth resonant mode supporting the sixth frequency band on the parasitic radiation segment 15. The sixth frequency band covers at least a portion of the ultra-high frequency band.

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

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

[0159] Among them, the second grounding point D2 and the area near the second grounding point D2 are high current regions.

[0160] Among them, the fifth opening end E5 and the area near the fifth opening end E5 are weak current regions.

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

[0162] Optionally, the sixth resonant mode includes a quarter-wavelength mode of the sixth frequency band. Specifically, the electrical length of the parasitic radiation segment 15 is close to one-quarter wavelength of the sixth frequency band, so that the second feed source 22 can excite the parasitic radiation segment 15 to form a current mode supporting the sixth frequency band, thereby improving 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 but 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] This embodiment uses the second feed source 22 to excite the radiator 10 and the parasitic radiation segment 15 to form a fourth resonant mode supporting the fourth frequency band, a fifth resonant mode supporting the fifth frequency band, and a sixth resonant mode supporting the sixth frequency band, thereby achieving high efficiency over a wide ultra-high frequency band. Furthermore, the first feed source 21 excites the first radiation segment 11, the second radiation segment 12, and the third radiation segment 13 to form a first resonant mode supporting the first frequency band, a second resonant mode supporting the second frequency band, and a third resonant mode supporting the third frequency band, enabling the radiator 10 to support mid-to-high frequency bands and achieve high efficiency over a wide mid-to-high frequency band; the radiator 10 can also support high frequency bands. 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 following frequency bands: B3, B39, B1, B40, B41, Wi-Fi 2.4G, and Wi-Fi 5G.

[0165] In another alternative implementation, please refer to Figure 26 The antenna assembly 100 further includes a parasitic radiation section 15. The parasitic radiation section 15 includes a fifth open end E5 and a second grounding point D2. Specifically, the two ends of the parasitic radiation section 15 are the fifth open end E5 and the second grounding point D2, respectively.

[0166] The fifth opening end E5 and the first opening end E1 are connected by an insulating gap G2. When both the radiator 10 and the parasitic radiating segment 15 are 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 segment 15 is greater than the distance between the feed point A and the first opening end E1. In this case, the parasitic radiation segment 15 is not conducive to improving the efficiency of the ultra-high frequency band. Therefore, 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 segment 15 and the third radiation segment 13 can be reduced or avoided, thereby reducing or avoiding the impact of the parasitic radiation segment 15 on the efficiency of the fourth and fifth frequency bands.

[0168] Optional, please refer to Figure 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 originating from the radiator 10 to the reference ground system 500, so as to avoid the influence of the ultra-high frequency band on the first feed 21. Further optionally, the bandstop frequency band of the first bandpass circuit 41 covers the mid-high frequency band, so as to prevent the mid-high frequency band from being conducted to the reference ground system 500 through the first bandpass circuit 41.

[0169] Optional, please refer to Figure 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 mid-high frequency band. The second bandpass circuit 42 is used to block the mid-high frequency band originating from the radiator 10 from being conducted to the second feed 22, so as to avoid the influence of the mid-high frequency band on the second feed 22.

[0170] The first bandpass circuit 41 includes components such as inductors and / or capacitors. The second bandpass circuit 42 includes components such as inductors and / or capacitors.

[0171] In one alternative implementation, please refer to Figure 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 feed point A.

[0173] The second capacitor C2 and the second inductor L2 have a bandpass frequency that covers the ultra-high frequency band. The first capacitor C1 and the first inductor L1 achieve impedance matching for the mid-to-high frequency band.

[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, or 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 0.1pF, 0.2pF, 0.3pF, 0.4pF, or 0.5pF. For example, the capacitance value of the second capacitor C2 is 0.3pF.

[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, or 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, or 5nH. For example, the inductance value of the second inductor L2 is 4.7nH.

[0178] In one alternative implementation, please refer to Figure 28 The second bandpass 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, and 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 feed 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 form a high-pass circuit for ultra-high frequency transmission, which passes ultra-high frequencies and blocks mid-to-high frequencies, and also achieves impedance matching for transmitting and receiving ultra-high frequency bands.

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

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

[0182] Optionally, the third inductor L3 can be a small inductor, for example, with an inductance value of 1.5nH, 1.6nH, 1.7nH, 1.8nH, 1.9nH, 2nH, 2.1nH, 2.3nH, 2.4nH, or 2.5nH. For instance, the first inductor L1 has an inductance value of 2nH.

[0183] Please see Figure 26 This application proposes an antenna assembly 100, wherein the radiator 10 includes a first radiating segment 11, a second radiating segment 12, and a third radiating segment 13.

[0184] Please see Figure 26The first radiating segment 11 and the second radiating segment 12 support operating bandwidths of 1.71-2.7GHz, covering mid-to-high frequencies (LTE B3 / B39 / B1 / B40 / B41, and Wi-Fi 2.4G). The third radiating segment 13 supports ultra-high frequencies (e.g., Wi-Fi 5G, 5.1-5.8GHz). The first feed source 21 and the second feed source 22 adopt a split-feed, shared-spring-pattern feeding method, and share a common radiator 10 (first radiating segment 11 and third radiating segment 13). The radiator 10 has multiple resonant modes.

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

[0186] The first feed 21 also excites a second resonant mode current distribution near 2.65 GHz, with the current mainly concentrated from the third opening terminal E3 to the first grounding point D1. The second resonant mode is a quarter-wavelength resonant mode from the first grounding point D1 to the third opening terminal E3.

[0187] The first feed 21 also excites the current distribution of the third resonant mode near 3.14 GHz. The current is mainly concentrated from the first opening end E1 to the first ground point D1, and the currents on both sides of the coupling gap G1 are out of phase.

[0188] The second feed source 22 feeds from feed point A, exciting the current distribution of the fourth resonant mode near 5.18 GHz. The current is mainly concentrated from feed point A to the first opening end E1, and the current on the stub is in phase. The fourth resonant mode is a quarter-wavelength resonant mode from feed point A to the first opening end E1.

[0189] The second feed 22 can also excite the current distribution of the fifth resonant mode near 5.7 GHz. The current is mainly concentrated at a current inversion point J between the second opening end E2 and the first opening end E1. The fifth resonant mode is the wavelength-1 mode of this stub.

[0190] Please see Figure 29 , Figure 29 yes Figure 26The provided antenna assembly 100 includes S-parameter curves for the frequency bands supported by the first feed 21 and the second feed 22 excitation radiator 10. Curve a is the S-parameter curve for the frequency band supported by the first feed 21 excitation radiator 10. Curve b is the S-parameter curve for the frequency band supported by the second feed 22 excitation radiator 10. Curve c is the isolation curve between the first feed 21 and the second feed 22. It can be seen that the frequency band supported by the first feed 21 excitation radiator 10 has a large bandwidth, covering 1.7–2.7 GHz and 5.1–5.8 GHz.

[0191] Please see Figure 30 , Figure 30 yes Figure 26 The provided antenna assembly 100 provides efficiency curves for the frequency bands supported by the first feed 21 and the second feed 22 excitation radiator 10. Curve a represents the radiation efficiency of the frequency band supported by the first feed 21 excitation radiator 10. Curve b represents the total efficiency of the frequency band supported by the first feed 21 excitation radiator 10. Curve c represents the radiation efficiency of the frequency band supported by the second feed 22 excitation radiator 10. Curve d represents the total efficiency of the frequency band supported by the second feed 22 excitation radiator 10. It can be seen that the frequency bands supported by the first feed 21 and the second feed 22 excitation radiator 10 cover 1.7–2.7 GHz and 5.1–5.8 GHz, with an efficiency greater than -7.5 dB in the 1.7–2.7 GHz range and greater than -4 dB in the 5.1–5.8 GHz range. This indicates that the first feed 21 and the second feed 22 excitation radiator 10 have high efficiency in both the 1.7–2.7 GHz and 5.1–5.8 GHz ranges.

[0192] Further, please refer to Figure 11a The radiator 10 also includes a fourth radiating segment 14. The radiator 10 extends from the first grounding point D1 toward the side opposite to the third opening end E3 to the fourth opening end E4. The length of the radiator 10 is increased, and it is open-circuited at the fourth opening end E4 without returning to ground. A 1.8 GHz current can flow to the fourth opening end E4, increasing the effective radiating aperture of the antenna and further improving antenna efficiency.

[0193] Please see Figure 31 , Figure 31 yes Figure 11aThe provided antenna assembly 100 provides efficiency curves for the frequency bands supported by the first feed 21 and the second feed 22 excitation radiator 10. Curve a represents the radiation efficiency of the frequency band supported by the first feed 21 excitation radiator 10. Curve b represents the total efficiency of the frequency band supported by the first feed 21 excitation radiator 10. Curve c represents the radiation efficiency of the frequency band supported by the second feed 22 excitation radiator 10. Curve d represents the total efficiency of the frequency band supported by the second feed 22 excitation radiator 10. It can be seen that the frequency bands supported by the first feed 21 and the second feed 22 excitation radiator 10 cover 1.7–2.7 GHz and 5.1–5.8 GHz, with an efficiency greater than -7.5 dB in the 1.7–2.7 GHz range and greater than -4 dB in the 5.1–5.8 GHz range. This indicates that the first feed 21 and the second feed 22 excitation radiator 10 have high efficiency in both the 1.7–2.7 GHz and 5.1–5.8 GHz ranges. In addition, the peak efficiency of the antenna in the B3 band was improved by 0.8 dB.

[0194] The antenna assembly 100 provided in this application covers a large bandwidth by exciting at least five different resonant modes on the radiator 10, thus satisfying the LTE B3 / B1 / B39 / B40 / B41 and Wi-Fi 2.4G / 5G frequency bands, while occupying a small space. Although embodiments of this application have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting this application. Those skilled in the art can make changes, modifications, substitutions, and variations to the above embodiments within the scope of this application, and such improvements and refinements are also considered to be within the protection scope of this application.

Claims

1. An antenna assembly, characterized in that, include: The radiator includes a first open end, a feed point, a second open end, a third open end, and a first grounding point, with a coupling gap between the second open end and the third open end. First feed source; A first matching circuit is electrically connected between the feed point and the first feed source; Second feed source; and A second matching circuit is electrically connected between the feed point and the second feed source; The first feed source is used to excite the radiator to form at least two resonant modes to support the mid-to-high frequency band. The first feed source is used to excite the radiator to form a first resonant mode that supports the first frequency band. The resonant current of the first resonant mode is mainly distributed between the feed point and the first ground point. The first frequency band covers at least part of the mid-to-high frequency band. The second feed source is used to excite the radiator to form at least two resonant modes to support the ultra-high frequency band.

2. The antenna assembly as claimed in claim 1, characterized in that, The current direction between the feed point and the second open end is the same as the current direction between the third open end and the first grounding point.

3. The antenna assembly as described in claim 1, characterized in that, The distance between the first grounding point and the third opening is less than or equal to the distance between the second opening and the feed point.

4. The antenna assembly as claimed in claim 1, characterized in that, The width of the coupling gap is less than or equal to the first preset width.

5. The antenna assembly as claimed in claim 1, characterized in that, The radiator further includes a first extending protrusion connected to the second opening end, and a second extending protrusion connected to the third opening end. The extending direction of the first extending protrusion intersects the extending direction of the radiator, and the extending direction of the second extending protrusion intersects the extending direction of the radiator. The first extending protrusion and the second extending protrusion are opposite to each other and spaced apart.

6. The antenna assembly as claimed in claim 1, characterized in that, The first feed source is used to excite the radiator to form a second resonant mode that supports the second frequency band. The resonant current of the second resonant mode is mainly distributed between the third opening end and the first grounding point. The second frequency band covers at least part of the mid-to-high frequency band.

7. The antenna assembly as claimed in claim 6, characterized in that, The second resonant mode includes the 1 / 4 wavelength mode of the second frequency band.

8. The antenna assembly as claimed in claim 1, characterized in that, The first feed source is used to excite the radiator to form a third resonant mode that supports the third frequency band. The resonant current of the third resonant mode is mainly distributed between the first opening end and the first grounding point. The third frequency band covers at least a portion of the high frequency band.

9. The antenna assembly as claimed in claim 1, characterized in that, The second feed source is used to excite the radiator to form a fourth resonant mode that supports the fourth frequency band. The resonant current of the fourth resonant mode is mainly distributed between the feed point and the first opening end. The fourth frequency band covers at least a portion of the ultra-high frequency band.

10. The antenna assembly as claimed in claim 9, characterized in that, The fourth resonant mode includes the 1 / 4 wavelength mode of the fourth frequency band.

11. The antenna assembly as claimed in claim 1, characterized in that, The second feed source is used to excite the radiator to form a fifth resonant mode that supports the fifth frequency band. The resonant current of the fifth resonant mode is mainly distributed between the second opening end and the first opening end. The fifth frequency band covers at least a portion of the ultra-high frequency band.

12. The antenna assembly as claimed in claim 11, characterized in that, The fifth resonant mode includes the 1-wavelength mode of the fifth frequency band.

13. The antenna assembly as claimed in claim 2, characterized in that, The radiator further includes a fourth opening, which is located on the side of the first grounding point away from the third opening. The resonant current of the first resonant mode is also distributed between the first grounding point and the fourth opening end.

14. The antenna assembly as claimed in claim 13, characterized in that, The antenna assembly further includes a switching unit, one end of which is electrically connected to the fourth opening terminal, and the other end of which is grounded. When the switching unit is in the conducting state, the resonant current of the first resonant mode is distributed between the feed point and the first ground point; When the switching unit is in the off state, the resonant current of the first resonant mode is distributed between the feed point and the fourth opening end.

15. The antenna assembly as described in any one of claims 1 to 14, characterized in that, The antenna assembly further includes a parasitic radiation section, which includes a fifth open end and a second grounding point. The fifth open end and the first open end are separated by an insulating gap. The length of the parasitic radiation section is less than or equal to the distance between the feed point and the first open end. The width of the insulating gap is less than or equal to a second preset width. The fifth open end and the first open end are coupled to each other.

16. The antenna assembly as claimed in claim 15, characterized in that, The second feed source is used to excite the formation of a sixth resonant mode supporting the sixth frequency band on the parasitic radiation segment, the sixth frequency band covering at least a portion of the ultra-high frequency band.

17. The antenna assembly as described in any one of claims 1 to 14, 16, characterized in that, The antenna assembly further includes a parasitic radiation section, which includes a fifth open end and a second grounding point. The fifth open end and the first open end are separated by an insulating gap. The length of the parasitic radiation section is greater than the distance between the feed point and the first open end, and the width of the insulating gap is greater than a third preset width.

18. The antenna assembly as described in any one of claims 1 to 14, 16, characterized in that, The first matching circuit includes a first bandpass circuit, one end of which is grounded, and the 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, the bandpass frequency band of which covers the ultra-high frequency band and the bandstop frequency band of which covers the mid-high frequency band.

19. The antenna assembly as claimed in claim 18, characterized in that, 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. The other end of the first inductor is electrically connected to the feed point. The bandpass of the second capacitor and the second inductor covers the ultra-high frequency band. And / or, The second bandpass 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, and 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 feed point, and the other end of the third inductor is grounded.

20. An electronic device, characterized in that, The electronic device includes an antenna assembly as described in any one of claims 1 to 19.

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