Antenna assembly and electronic device

Abstract

The present application provides an antenna assembly and an electronic device. The antenna assembly comprises a radiator and a first feed source. The radiator comprises a first open end, a feeding point, a second open end, a third open end, and a first ground point. A first coupling slot is formed between the second open end and the third open end. The first feed source is electrically connected to the feeding point. The first feed source is used for exciting the radiator to form a first resonance mode supporting a first frequency band. Resonant current of the first resonance mode is mainly distributed between the feeding point and the first ground point. In the first resonance mode, the direction of resonant current between the feeding point and the second open end is the same as the direction of resonant current between the third open end and the first ground point. The first frequency band covers at least part of a mid-high frequency band or an ultra-high frequency band. The antenna assembly can support the first frequency band and has a relatively long radiation aperture, so as to increase the efficiency of the first frequency band, and also facilitates that the structure of the radiator can support more frequency bands subsequently.

Description

Antenna components and electronic devices

[0001] This application claims priority to Chinese Patent Application No. 2024119988609, filed with the Chinese Patent Office on December 31, 2024, entitled “Antenna Assembly and Electronic Equipment”, the entire contents of which are incorporated herein by reference. Technical Field

[0002] This application relates to the field of communication technology, specifically to an antenna assembly and electronic device. Background Technology

[0003] With the development of network technology, the usage scenarios of mobile phones and other electronic devices are becoming increasingly complex. How to ensure that the frequency bands supported by antenna components have high efficiency and can support more frequency bands has become a technical problem that needs to be solved. Summary of the Invention

[0004] This application provides an antenna assembly that enables higher efficiency in the supported frequency bands and supports more frequency bands, as well as an electronic device having the antenna assembly.

[0005] In a first aspect, an antenna assembly provided in an embodiment of this application includes:

[0006] The radiator includes a first open end, a feed point, a second open end, a third open end, and a first grounding point, wherein the second open end and the third open end are connected by a first coupling gap.

[0007] A first feed source is electrically connected to the feed point; the first feed source is used to excite the radiator to form a first resonant mode supporting a first frequency band, the resonant current of the first resonant mode is mainly distributed between the feed point and the first ground point, and the first frequency band covers at least part of the mid-high frequency band or ultra-high frequency band.

[0008] Secondly, this application provides an electronic device that includes the antenna assembly described in the first aspect. Attached Figure Description

[0009] 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.

[0010] Figure 1 is a schematic diagram of the structure of an electronic device provided in an embodiment of this application;

[0011] Figure 2 is a partially exploded view of the electronic device provided in an embodiment of this application;

[0012] Figure 3 is a partial rear view of the electronic device provided in the embodiment of this application with the back cover removed;

[0013] Figure 4 is a schematic diagram of the antenna assembly provided in Embodiment 1 of this application;

[0014] Figure 5 is a schematic diagram of the current distribution in the first resonant mode provided in Embodiment 1 of this application;

[0015] Figure 6 is a simulation diagram of the current distribution in the first resonant mode provided in Embodiment 1 of this application;

[0016] Figure 7 is a schematic diagram of the current distribution in the first resonant mode provided in Embodiment 1 of this application;

[0017] Figure 8 is a second structural schematic diagram of the antenna assembly provided in Embodiment 1 of this application;

[0018] Figure 9 is a schematic diagram of the current distribution on the second resonant mode of the antenna assembly provided in Embodiment 1 of this application;

[0019] Figure 10 is a simulation diagram of the current distribution on the second resonant mode of the antenna assembly provided in Embodiment 1 of this application;

[0020] Figure 11 is a schematic diagram of the antenna assembly provided in Embodiment 1 of this application;

[0021] Figure 12 is a schematic diagram of the current distribution on the third resonant mode of the antenna assembly provided in Embodiment 2 of this application;

[0022] Figure 13 is a simulation diagram of the current distribution on the third resonant mode of the antenna assembly provided in Embodiment 2 of this application;

[0023] Figure 14 is a schematic diagram of the antenna assembly provided in Embodiment 2 of this application;

[0024] Figure 15 is a schematic diagram of the current distribution on the fourth resonant mode of the antenna assembly provided in Embodiment 2 of this application;

[0025] Figure 16 is a simulation diagram of the current distribution on the fourth resonant mode of the antenna assembly provided in Embodiment 2 of this application;

[0026] Figure 17 is a schematic diagram of the current distribution on the first resonant mode of the antenna assembly provided in Embodiment 2 of this application;

[0027] Figure 18 is a simulation diagram of the current distribution on the first resonant mode of the antenna assembly provided in Embodiment 2 of this application;

[0028] Figure 19 is a schematic diagram of the antenna assembly provided in Embodiment 3 of this application;

[0029] Figure 20 is a second structural schematic diagram of the antenna assembly provided in Embodiment 3 of this application;

[0030] Figure 21 is a schematic diagram of the structure of the first matching circuit provided in an embodiment of this application;

[0031] Figure 22 is a schematic diagram of the structure of the second matching circuit provided in an embodiment of this application;

[0032] Figure 23 is a schematic diagram of the antenna assembly provided in an embodiment of this application;

[0033] Figure 24 shows the S-parameter curves of the first feed excitation radiator and the parasitic radiation section of the antenna assembly provided in Figure 11 in the first and second frequency bands.

[0034] Figure 25 shows the system efficiency curves of the first feed excitation radiator and parasitic radiation section of the antenna assembly provided in Figure 11 in the first and second frequency bands.

[0035] Figure 26 shows the S-parameter curves of the first feed and second feed excitation radiators of the antenna assembly provided in Figure 23 in the supported frequency band.

[0036] Figure 27 shows the efficiency curves of the first feed and second feed excitation radiators of the antenna assembly provided in Figure 23 in the supported frequency band. Detailed Implementation

[0037] 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.

[0038] Please refer to Figure 1, which 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.

[0039] Please refer to Figure 2, which is a partially exploded view of the electronic device 1000 provided in this embodiment of the application. 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 components such as the motherboard 600, camera module, receiver module, battery 700, sub-board 800, and various sensors. One side of the frame 320 along its thickness direction surrounds the edge of the display screen 200, and the other side of the frame 320 along its 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.

[0040] Please refer to Figure 3, which is a partial rear view of the electronic device 1000 provided in this embodiment of the application with the back cover 400 removed. 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.

[0041] 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.

[0042] Referring to Figure 3, 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. Various slots, holes, etc., are formed on the reference ground edge of the reference ground system 500 to accommodate components or avoid other structures within 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 boards (including the main board 600 and the sub-board 800). In general, the reference ground system in the electronic device 1000 can be equivalent to a roughly rectangular shape, hence the name reference ground system 500. However, the term "reference ground system 500" does not imply that the reference ground is plate-shaped or a rectangular plate.

[0043] The specific structure of the antenna assembly 100 provided in Embodiment 1 will be illustrated below with reference to the accompanying drawings.

[0044] Please refer to Figures 3 and 4. The antenna assembly 100 includes a radiator 10 and a first feed 21.

[0045] 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, sheet, rod, coating, or film. The radiator 10 shown in Figure 3 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 always strip-shaped. This application does not limit the extension trajectory of the radiator 10. Optionally, the radiator 10 may extend along a straight line, a curve, or a bend. The radiator 10 described above may be a line of uniform width along its extension trajectory, or a strip of varying width, such as one with a gradually changing width or a widened region.

[0046] 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.

[0047] 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.

[0048] Please refer to Figures 3 and 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.

[0049] The open end mentioned in this application refers to the end that is disconnected from other conductive parts on the frame 320 by a 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 gap is filled with insulating material.

[0050] 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.

[0051] Referring to 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.

[0052] Referring to Figure 4, the first coupling gap G1 is located between the second opening end E2 and the third opening end E3. In other words, the first coupling gap G1 is located between the first radiating segment 11 and the second radiating segment 12.

[0053] The first coupling gap G1 is a slit, 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 be capacitively coupled through the first 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 first coupling gap G1. "Capacitive coupling" means that the first 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.

[0054] Please refer to Figure 4. The antenna assembly 100 also includes a first matching circuit M1.

[0055] Please refer to Figure 4. The first matching circuit M1 is electrically connected between the feed point A and the first feed source 21.

[0056] Optionally, the feed point A inside the frame 320 may be a bump protruding toward the reference ground system 500.

[0057] Referring to 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 excitation of a first resonant mode by the first feed source 21 on the radiator 10.

[0058] Referring to Figure 4, the 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 via other components. In this embodiment, the first matching circuit M1 and the feed point A are indirectly electrically connected via radio frequency transmission lines, feed springs, etc.

[0059] 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.

[0060] The first feed source 21 is used to excite the radiator 10 to form a first resonant mode supporting a first frequency band. The first frequency band covers at least a portion of the mid-high frequency band or the ultra-high frequency band.

[0061] 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 2.4 GHz bands). The B3 / B39 / B1 / B40 / B41 bands can support 2G / 3G / 4G / 5G / 6G communication standards.

[0062] Among them, the ultra-high frequency band includes some or all of the frequency bands above 2.7 GHz (such as the N77 band, N78 band, N79 band, Wi-Fi 5G band, etc.).

[0063] Please refer to Figure 5. The 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).

[0064] 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 2.6 GHz; of course, the resonant frequency of the first frequency band can also be other frequencies.

[0065] The direction of the resonant current in the first resonant mode between the feed point A and the second open end E2 is the same as the direction of the resonant current between the third open end E3 and the first ground point D1.

[0066] Further optionally, referring to Figure 5, in the first resonant mode, the current direction between the feed point A and the second open end E2 (first radiation segment 11) is the same as the current direction between the third open end E3 and the first ground point D1 (second radiation segment 12). Optionally, the current between the feed point A and the second open end E2 (first radiation segment 11) and the current between the third open end E3 and the first ground point D1 (second radiation 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 radiation segment 11 and the second radiation segment 12. Thus, in the first frequency band, the length of the in-phase current increases, increasing the radiation aperture and thereby increasing efficiency.

[0067] Please refer to Figures 5 and 6. In 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.

[0068] 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.

[0069] Please refer to Figure 6. Feed point A, and the portion between feed point A and the second opening end E2, and close to feed point A, is a high current region.

[0070] Please refer to Figure 6. The regions near the second opening end E2 and the third opening end E3 are weak current regions.

[0071] This application designs an antenna assembly 100 including a radiator 10 and a first feed 21. The radiator 10 includes a first opening E1, a feed point A, a second opening E2, a third opening E3, and a first ground point D1. A first coupling gap is formed between the second opening E2 and the third opening E3. The first feed 21 is electrically connected to the feed point A. The first feed 21 is used to excite the radiator 10 to form a first resonant mode supporting a first frequency band. The resonant current of the first resonant mode is mainly distributed between the feed point A and the first ground point D1. The direction of the resonant current of the first resonant mode between the feed point A and the second opening E2 is the same as the direction of the resonant current between the third opening E3 and the first ground point D1. The first frequency band covers at least part of the mid-high frequency band or ultra-high frequency band. The antenna assembly 100 can support the first frequency band and has a relatively long radiating aperture to increase the efficiency of the first frequency band. It also facilitates the structure of the radiator 10 to support more frequency bands in the future.

[0072] In one optional implementation, referring to Figure 7, the distance between the feed point A and the second open end E2 is greater than or equal to the distance between the third open end E3 and the first grounding point D1. In other words, the distance h1 between the first grounding point D1 and the third open end E3 is less than or equal to the distance h2 between the second open end E2 and the feed point A. In other words, the length of the first radiating segment 11 is greater than the length of the second radiating segment 12.

[0073] 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.

[0074] 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, forming a common-mode mode, avoiding or reducing the generation of reverse current. In this way, in the first frequency band, the length of the in-phase current increases, the radiation aperture increases, and thus the efficiency increases.

[0075] Optionally, referring to Figure 8, the antenna assembly 100 further includes a parasitic radiation section 14. The parasitic radiation section 14 includes a fourth open end E4 and a second grounding point D2. Specifically, the two ends of the parasitic radiation section 14 are the fourth open end E4 and the second grounding point D2, respectively.

[0076] Referring to Figure 8, the second coupling gap G2 is located between the fourth opening end E4 and the first opening end E1. When both the radiator 10 and the parasitic radiating segment 14 are part of the frame 320, the second coupling gap G2 is filled with an insulating medium to ensure the overall strength of the frame 320.

[0077] Optionally, the length of the parasitic radiation segment 14 is less than or equal to the distance between the feed point A and the first opening end E1. When the length of the parasitic radiation segment 14 is less than the length of the third radiation segment 13, by setting the width of the second coupling gap G2 to be less than or equal to the second preset width, the coupling between the fourth opening end E4 and the first opening end E1 is increased. This facilitates the formation of a current with the same direction and uniform intensity on the parasitic radiation segment 14, resulting in a current with uniform intensity distribution, which is beneficial for improving the bandwidth and efficiency of the ultra-high frequency band or mid-high frequency band.

[0078] 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 second coupling gap 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.

[0079] The first feed source 21 is also used to excite the radiator 10 to form a second resonant mode that supports the second frequency band.

[0080] Please refer to Figure 9. The resonant current of the second resonant mode is mainly distributed between the feed point A and the second ground point D2 (i.e., on the third radiation segment 13 and the parasitic radiation segment 14). The second frequency band covers at least a portion of the mid-to-high frequency band.

[0081] In one alternative implementation, both the first and second frequency bands are used to cover at least a portion of the mid-to-high frequency bands.

[0082] For example, when the mid-to-high frequency band is 1.7–2.7 GHz, the second frequency band is a portion of the 1.7–2.7 GHz band. The resonant frequency of the second frequency band is 1.8 GHz; of course, the resonant frequency of the second frequency band can also be other frequencies.

[0083] 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.

[0084] 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.

[0085] The center frequency of the second frequency band is less than the center frequency of the first frequency band. In other words, the length between the feed point A and the second opening end E2 is less than the length between the feed point A and the first opening end E1.

[0086] For example, the resonant frequency of the second band is 1.8 GHz, and the resonant frequency of the first band is 2.6 GHz.

[0087] The direction of the resonant current in the second resonant mode between the feed point A and the first open end E1 is the same as the direction of the resonant current between the fourth open end E4 and the second ground point D2.

[0088] Further optionally, in the second resonant mode, the current direction between the feed point A and the first open end E1 (third radiation segment 13) is the same as the current direction between the fourth open end E4 and the second ground point D2 (parasitic radiation segment 14). Optionally, the current between the feed point A and the first open end E1 (third radiation segment 13) and the current between the fourth open end E4 and the second ground point D2 (parasitic radiation segment 14) are in phase. In this case, the second 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 third radiation segment 13 and the parasitic radiation segment 14. Thus, in the first frequency band, the length of the in-phase current increases, increasing the radiation aperture and thereby increasing efficiency.

[0089] Please refer to Figure 9. In a certain phase, the resonant current (dashed arrow) on the radiator 10 can flow from the feed point A to the first open end E1, and from the fourth open end E4 to the second ground point D2.

[0090] In another phase, the resonant current on the radiator 10 can also flow from the second grounding point D2 to the fourth open end E4, and from the first open end E1 to the feed point A.

[0091] Please refer to Figure 10. The currents between the fourth open end E4 and the first open end E1 are in the same direction and are both relatively strong.

[0092] The second resonant mode forms a common-mode mode with strong and uniform current intensity in the third radiation segment 13 and the parasitic radiation segment 14. Thus, in the first frequency band, the length of the current in the same direction increases, which increases the radiation aperture and thus increases the efficiency.

[0093] The width of the second coupling gap G2 is less than or equal to the width of the first coupling gap G1.

[0094] Further optional, referring to Figure 9, the width of the second coupling gap G2 is less than or equal to the 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 second coupling gap G2 is less than or equal to 1mm. Further optional, the first preset width is 0.9mm, thus the width of the second coupling gap G2 is less than or equal to 0.9mm. Further optional, the first preset width is 0.8mm, thus the width of the second coupling gap G2 is less than or equal to 0.8mm. Further optional, the first preset width is 0.7mm, thus the width of the second coupling gap G2 is less than or equal to 0.7mm. Further optional, the first preset width is 0.6mm, thus the width of the second coupling gap G2 is less than or equal to 0.6mm. Further optional, the first preset width is 0.5mm, thus the width of the second coupling gap G2 is less than or equal to 0.5mm.

[0095] In this embodiment, by setting the width of the second coupling gap G2 to be smaller, the coupling capacitance between the third radiation segment 13 and the parasitic radiation segment 14 is increased, thereby increasing the resonant current intensity on the parasitic radiation segment 14. This facilitates the formation of in-phase currents on the third radiation segment 13 and the parasitic radiation segment 14, and the current directions on the third radiation segment 13 and the parasitic radiation segment 14 are the same. Thus, when operating in the first frequency band, the length of the in-phase current increases, increasing the radiation aperture and thereby increasing efficiency.

[0096] The second coupling gap G2 is equivalent to a capacitor in series between the third radiation segment 13 and the parasitic radiation segment 14 to cancel out the inductance, which is conducive to the formation of a current in phase with the third radiation segment 13 in the parasitic radiation segment 14.

[0097] In other embodiments, the width of the second coupling gap G2 may be greater than the first preset width.

[0098] The first frequency band and the second frequency band form a continuous frequency band, which covers 1.71-2.7GHz. The antenna supports an operating bandwidth of 1.71-2.7GHz, covering a relatively wide range of mid-to-high frequency bands (e.g., LTE B3 / B39 / B1 / B40 / B41, or Wi-Fi 2.4G).

[0099] In the first embodiment of this application, the antenna assembly 100 is designed to include a radiator 10 and a first feed 21. 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 first coupling gap G1 is formed between the second open end E2 and the third open end E3. 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 bands, and can cover multiple frequency bands in a limited space.

[0100] In an optional embodiment, referring to FIG11, the radiator 10 further includes a first extension protrusion 101 connected to the first opening end E1. The extension direction of the first extension protrusion 101 intersects the extension direction of the radiator 10.

[0101] Optionally, the first extending protrusion 101 and the first opening end E1 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.

[0102] Referring to Figure 11, the radiator 10 further includes a second extending protrusion 102 connected to the fourth opening end E4. The extending direction of the second extending protrusion 102 intersects 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.

[0103] Optionally, the second extending protrusion 102 and the fourth opening end E4 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.

[0104] Furthermore, the first extended protrusion 101 and the second extended protrusion 102 are also located on both sides of the first 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 first coupling gap G1, which is also the coupling area, thereby further increasing the coupling capacitance between the third radiating segment 13 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 third radiating segment 13 and the second radiating segment 12. Also, the current directions on the third radiating segment 13 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.

[0105] 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 first coupling gap G1 can be increased with less space.

[0106] In other embodiments, the first extending protrusion 101 and the second extending protrusion 102 may not be provided on the radiator 10.

[0107] The above implementation methods can include at least the following situations: 1. The width of the first coupling gap G1 is less than or equal to the first preset width, and the 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 width for the first coupling gap G1. 2. The width of the first coupling gap G1 is less than or equal to the first preset width, and the radiator 10 has the first extending protrusion 101 and the second extending protrusion 102. The coupling capacitance is increased by setting a smaller width for the first coupling gap G1 and a larger coupling area. 3. The width of the first coupling gap G1 is greater than the first preset width, and the 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.

[0108] In other embodiments, the antenna assembly 100 may not include the second radiating segment 12, and the resonant current of the first resonant mode is distributed between the feed point A and the second opening end E2. The first resonant mode includes a 1 / 4 wavelength mode of the first frequency band. In other words, the first radiating segment 11 is close to 1 / 4 wavelength of the first frequency band.

[0109] Please refer to Figure 12. Embodiment 2 of this application also provides an antenna assembly 100. The antenna assembly 100 includes a first feed 21 and a radiator 10 as described above. Based on the first resonant mode formed on the radiator 10 as described above, the first feed 21 is also used to excite a third resonant mode supporting a third frequency band to be formed between the first opening end E1 and the second opening end E2.

[0110] Optionally, the first frequency band can cover ultra-high frequency bands, such as the Wi-Fi 5G band.

[0111] The resonant current of the third resonant mode is mainly distributed between the second open end E2 and the first open end E1 (first radiation segment 11 + third radiation segment 13). The third frequency band covers at least a portion of the mid-to-high frequency band.

[0112] Specifically, the first feed 21 can provide at least a third frequency band RF excitation signal. For example, the first frequency band covers the Wi-Fi 2.4G band. The first frequency band covers the Wi-Fi 5G band. The first feed 21 includes, but is not limited to, a Wi-Fi transceiver chip.

[0113] Alternatively, in the third 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).

[0114] The third resonant mode includes the half-wavelength mode of the third frequency band.

[0115] Please refer to Figure 12. The resonant current of the third resonant mode (shown by the dashed arrow in the figure) flows from the first open end E1 to the second open end E2, or the resonant current of the third resonant mode flows from the second open end E2 to the first open end E1.

[0116] Please refer to Figure 13. The second opening end E2 and the area near the second opening end E2 are weak current regions.

[0117] Please refer to Figure 13. The first opening end E1 and the area near the first opening end E1 are weak current regions.

[0118] The resonant current intensity of the third resonant mode on the first radiation segment 11 + the third radiation segment 13 is distributed in a weak-strong-weak direction from the second opening end E2 to the first opening end E1.

[0119] Optionally, the third resonant mode includes a half-wavelength mode of the third frequency band. Specifically, the electrical length of the first radiating segment 11 + the third radiating segment 13 is close to half the wavelength of the third frequency band, so that the first feed source 21 can excite the first radiating segment 11 + the third radiating segment 13 to form a half-wavelength current mode supporting the third frequency band, thereby improving efficiency in the third frequency band.

[0120] Optionally, the resonant frequency of the third frequency band is greater than the resonant frequency of the first frequency band.

[0121] Optionally, as shown in Figure 14, the antenna assembly 100 further includes a second feed 22, a first matching circuit M1, and a second matching circuit M2.

[0122] The first matching circuit M1 is electrically connected between the feed point A and the first feed source 21.

[0123] Referring to Figure 14, 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.

[0124] 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 traces.

[0125] 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.

[0126] The distance between the power supply point A and the second opening end E2 is less than the distance between the power supply point A and the first opening end E1.

[0127] Optionally, the distance between the power supply point A and the second open end E2 is less than the distance between the fourth open end E4 and the second grounding point D2.

[0128] The second feed source 22 is used to excite the fourth open end E4 to the second ground point D2 to support the fourth resonant mode of the fourth frequency band.

[0129] For example, the first feed 21 is a Wi-Fi band transceiver module. The second feed 22 includes an N78 band transceiver module.

[0130] As mentioned above, the first feed source 21 is used to excite the first and second radiating segments of the radiator 10 to support the first resonant mode of the first frequency band, wherein the first frequency band covers the Wi-Fi 2.4G frequency band.

[0131] The fourth resonant mode includes a 1 / 4 wavelength mode of the fourth frequency band. Specifically, the electrical length of the parasitic radiation segment is close to 1 / 4 wavelength of the fourth frequency band, so that the second feed 22 can excite the parasitic radiation segment to form a 1 / 4 wavelength current mode supporting the fourth frequency band, thereby improving the efficiency in the fourth frequency band.

[0132] Referring to Figure 15, in one phase, optionally, the resonant current on the parasitic radiation segment flows from the fourth open end E4 to the second grounding point D2. In another phase, optionally, the resonant current on the parasitic radiation segment flows from the second grounding point D2 to the fourth open end E4.

[0133] Please refer to Figure 16. The second grounding point D2 and the area near the second grounding point D2 are high current regions.

[0134] Please refer to Figure 16. The fourth opening end E4 and the area near the fourth opening end E4 are weak current regions.

[0135] Further optionally, as described above, the first feed source 21 excites the formation of a first resonant mode supporting a first frequency band on the first radiating segment and the second radiating segment, wherein the first frequency band includes the Wi-Fi 5G frequency band. The first feed source 21 excites the formation of a third resonant mode supporting a third frequency band on the first radiating segment and the third radiating segment, wherein the third frequency band includes the Wi-Fi 2.4G frequency band. Further, the second feed source 22 excites the formation of a fourth resonant mode supporting a fourth frequency band on the parasitic radiating segment, wherein the fourth frequency band includes the N78 frequency band.

[0136] The above design allows the first feed source 21 and the second feed source 22 to share the same radiator 10, thereby reducing the space occupied by the radiator 10 and effectively supporting frequency bands such as Wi-Fi 2.4G band, N78 band, and Wi-Fi 5G band.

[0137] In other embodiments, referring to Figures 17 and 18, the antenna assembly 100 may not include the second radiating segment 12. The resonant current of the first resonant mode is distributed between the feed point A and the second opening end E2. The first resonant mode includes a 1 / 4 wavelength mode of the first frequency band. In other words, the first radiating segment 11 is close to 1 / 4 wavelength of the first frequency band.

[0138] Embodiment 2 of this application designs an antenna assembly 100 including a radiator 10 and a first feed source 21. The radiator 10 includes a first open end E1, a feed point A, a second open end E2, a third open end E3, and a first ground point D1. A first coupling gap G1 is formed between the second open end E2 and the third open end E3. The first feed source 21 is used to excite the radiator 10 to form a first resonant mode supporting a first frequency band, a second resonant mode supporting a second frequency band, and a third resonant mode supporting a third frequency band, so as to support the Wi-Fi 2.4G band + N78 band + Wi-Fi 5G band, and all share the same radiator 10, which can cover multiple frequency bands in a limited space.

[0139] Please refer to Figure 19. Embodiment 3 of this application also provides an antenna assembly 100, which includes the first feed 21, the second feed 22, and the radiator 10 from Embodiment 2.

[0140] Referring to Figure 19, the antenna assembly 100 also includes a combiner 51, a first radio frequency front-end circuit 41, and a second radio frequency front-end circuit 42. Furthermore, the antenna assembly 100 also includes a third radio frequency front-end circuit 43.

[0141] Referring to Figure 19, the first sub-terminal a1 of the combiner 51 is electrically connected to the first feed source 21. The second sub-terminal b1 of the combiner 51 is electrically connected to the second feed source 22. The third sub-terminal c1 of the combiner 51 is electrically connected to the feed point A. The second feed source 22 is used to provide antenna signals in a fourth frequency band, which includes the N78 frequency band.

[0142] The first RF front-end circuit 41 is electrically connected between the first feed 21 and the first sub-terminal a1 of the combiner 51. The first RF front-end circuit 41 is used to amplify the antenna signal of the third frequency band. Optionally, the third frequency band includes the Wi-Fi 2.4G frequency band.

[0143] The second RF front-end circuit 42 is electrically connected to the first feed source 21 and the first matching circuit M1. The second RF front-end circuit 42 is used to amplify the antenna signal of the first frequency band. The third RF front-end circuit 43 is used to amplify the antenna signal of the fourth frequency band.

[0144] Specifically, the first feed source 21 is electrically connected to one end of the first RF front-end circuit 41 and one end of the third RF front-end circuit 43; the other end of the first RF front-end circuit 41 is electrically connected to the first sub-terminal a1 of the combiner 51. The other end of the third RF front-end circuit 43 is electrically connected to the feed point A of the radiator 10.

[0145] Specifically, the second feed 22 is electrically connected to one end of the second RF front-end circuit 42, and the other end of the second RF front-end circuit 42 is electrically connected to the second sub-terminal b1 of the combiner 51. The third sub-terminal c1 of the combiner 51 is electrically connected to the feed point A of the radiator 10.

[0146] Thus, the first frequency band provided by the first feed source 21 can be transmitted to the radiator 10 through the third RF front-end circuit 43. The third frequency band provided by the first feed source 21 can be transmitted sequentially through the first RF front-end circuit 41 and the combiner 51 to the feed point A of the radiator 10. The fourth frequency band provided by the second feed source 22 can be transmitted sequentially through the second RF front-end circuit 42 and the combiner 51 to the feed point A of the radiator 10. This not only enables the first feed source 21 and the second feed source 22 to share the radiator 10, but also allows the first feed source 21 to transmit and receive antenna signals through a separate front-end path, thereby improving the efficiency of the first frequency band during operation.

[0147] Compared to this embodiment, in the antenna assembly 100 provided in Embodiment 2, the first frequency band and the third frequency band provided by the first feed 21 can be transmitted and received by the radiator 10 through the antenna switch or the combiner 51, respectively. The fourth frequency band provided by the second feed 22 transmits and receives antenna signals through a separate front-end path, which is beneficial for the fourth frequency band to have higher efficiency when working.

[0148] In other embodiments, referring to FIG20, a switching unit 52 is provided between the other end of the first RF front-end circuit 41 and the first sub-terminal a1 of the combiner 51. The other end of the first RF front-end circuit 41 is electrically connected to the fixed end of the switching unit 52, the first selection end of the switching unit 52 is electrically connected to the second selection end of the antenna switch 53, and the second selection end of the switching unit 52 is electrically connected to the first sub-terminal a1 of the combiner 51. The fixed end of the antenna switch 53 is electrically connected to the feed point A of the radiator 10 or the first matching circuit M1. The first selection end of the antenna switch 53 is also electrically connected to the other end of the third RF front-end circuit 43.

[0149] When higher efficiency is required for operation in the first frequency band, the switching unit 52 connects the other end of the first RF front-end circuit 41 to the first sub-terminal a1 of the combiner 51. When higher efficiency is required for operation in the fourth frequency band, the switching unit 52 connects the other end of the first RF front-end circuit 41 to the radiator 10 (or antenna switch 53).

[0150] In this embodiment, referring to Figure 21, the first matching circuit M1 includes a first band-stop circuit M11. The first band-stop circuit M11 is a band-stop circuit for the fourth frequency band, used to block the signal of the fourth frequency band from affecting the first feed source 21, thereby improving the working efficiency of the first and third frequency bands. Optionally, the first band-stop circuit M11 includes an inductor, a capacitor, etc.

[0151] Referring to Figure 22, the second matching circuit M2 includes a second band-stop circuit M21 and a first band-pass circuit M22. The second band-stop circuit M21 is a band-stop circuit for the third frequency band, used to block signals from the third frequency band from affecting the second feed source 22 and improve the operating efficiency of the fourth frequency band. Optionally, the second band-stop circuit M21 includes inductors, capacitors, etc. Optionally, the first band-pass circuit M22 includes inductors, capacitors, etc.

[0152] The first bandpass circuit M22 is a bandpass circuit for the first frequency band. The first bandpass circuit M22 is grounded and is used to block the signal of the first frequency band from affecting the second feed source 22, thereby improving the working efficiency of the fourth frequency band.

[0153] The first matching circuit M1 and the second matching circuit M2 provided in this embodiment can effectively improve the isolation of the first feed 21 and the second feed 22 when they co-radiate the 10, thereby improving the working efficiency of the first feed 21 in exciting the first frequency band and the second frequency band, and improving the working efficiency of the second feed 22 in exciting the third frequency band.

[0154] Optionally, referring to Figure 21, the first matching circuit M1 includes a first matching element P1. One end of the first matching element P1 is electrically connected to the feed point A. The first resistive circuit M11 includes a first resistive element M111 and a second resistive element M112. One end of the first resistive element M111 is electrically connected to the other end of the first matching element P1. One end of the second resistive element M112 is electrically connected to the other end of the first matching element P1. The other ends of the first resistive element M111 and the other ends of the second resistive element M112 are electrically connected to the first feed source 21.

[0155] For example, the first matching element P1 includes, but is not limited to, a capacitor. Further optionally, the first matching element P1 includes, but is not limited to, a small capacitor, for example, the capacitance value of the first matching element P1 is less than 2pF.

[0156] For example, the first resistive element M111 includes, but is not limited to, a capacitor element. Further optionally, the first resistive element M111 includes, but is not limited to, a small capacitor, for example, the capacitance value of the first resistive element M111 is less than 2pF.

[0157] For example, the second resistive element M112 includes, but is not limited to, an inductor. Further optionally, the second resistive element M112 includes, but is not limited to, a small inductor, for example, the inductance value of the second resistive element M112 is less than 5nH.

[0158] Please refer to Figure 22. The second matching circuit M2 includes a second matching element P2, a third matching element P3, a fourth matching element P4, and a fifth matching element P5. One end of the second matching element P2 is electrically connected to the feed point A, and the other end of the second matching element P2 is grounded.

[0159] The second resistive circuit M21 includes a third resistive element M211 and a fourth resistive element M212. One end of the third resistive element M211 is electrically connected to one end of the second matching element P2, and the other end of the third resistive element M211 is electrically connected to one end of the third matching element P3. One end of the fourth resistive element M212 is electrically connected to one end of the second matching element P2, and the other end of the fourth resistive element M212 is electrically connected to one end of the third matching element P3.

[0160] One end of the fourth matching element P4 is electrically connected to the other end of the third matching element P3, and the other end of the fourth matching element P4 is electrically connected to one end of the fifth matching element P5. The other end of the fifth matching element P5 is electrically connected to the second feed source 22.

[0161] The first bandpass circuit M22 includes a first bandpass sub-element M221 and a second bandpass sub-element M222. One end of the first bandpass sub-element M221 is electrically connected to the other end of the third matching element P3, and the other end of the first bandpass sub-element M221 is electrically connected to one end of the second bandpass sub-element M222. The other end of the second bandpass sub-element M222 is grounded.

[0162] For example, the second matching element P2 includes, but is not limited to, a capacitor. Further optionally, the second matching element P2 includes, but is not limited to, a small capacitor, for example, the capacitance value of the second matching element P2 is less than 0.3pF.

[0163] For example, the third matching element P3 includes, but is not limited to, an inductor. Further optionally, the third matching element P3 includes, but is not limited to, a small inductor, for example, the inductance value of the third matching element P3 is less than 5.1nH.

[0164] For example, the fourth matching element P4 includes, but is not limited to, an inductor. Further optionally, the fourth matching element P4 includes, but is not limited to, a small inductor, for example, the inductance value of the fourth matching element P4 is less than 7nH.

[0165] For example, the fifth matching element P5 includes, but is not limited to, a capacitor. Further optionally, the fifth matching element P5 includes, but is not limited to, a small capacitor, for example, the capacitance value of the fifth matching element P5 is less than 0.4pF.

[0166] For example, the third resistor element M211 includes, but is not limited to, a capacitor element. Further optionally, the third resistor element M211 includes, but is not limited to, a small capacitor, for example, the capacitance value of the third resistor element M211 is less than 2pF.

[0167] For example, the fourth resistor element M212 includes, but is not limited to, an inductor element. Further optionally, the fourth resistor element M212 includes, but is not limited to, a small inductor, for example, the inductance value of the fourth resistor element M212 is less than 8nH.

[0168] For example, the first bandpass element M221 includes, but is not limited to, a capacitor element. Further optionally, the first bandpass element M221 includes, but is not limited to, a small capacitor, for example, the capacitance value of the first bandpass element M221 is less than 2pF.

[0169] For example, the second bandpass element M222 includes, but is not limited to, an inductor. Further optionally, the second bandpass element M222 may include, but is not limited to, a small inductor, for example, the inductance value of the second bandpass element M222 is less than 3nH.

[0170] Optionally, referring to Figures 6 and 10, the radiator 10 further includes a third grounding point D3. Furthermore, the third grounding point D3 is interconnected with the portion of the middle plate that serves as a reference ground, to prevent the radiator 10 from being suspended relative to the middle plate, thereby improving the overall strength of the frame.

[0171] Optionally, the third grounding point D3 is located between the feed point A and the first open end E1. The distance between the third grounding point D3 and the feed point A is less than the distance between the third grounding point D3 and the first open end E1. Further, the third grounding point D3 is located close to the feed point A. For the resonant current of the aforementioned second resonant mode, the third grounding point D3 is located at the current strength point of the second resonant mode, and grounding the third grounding point D3 at the current strength point has virtually no impact on the current of the second resonant mode. For the resonant current of the aforementioned third resonant mode, the third grounding point D3 is located at the current strength point of the third resonant mode, and grounding the third grounding point D3 at the current strength point has virtually no impact on the current of the third resonant mode. The resonant currents of the first and fourth resonant modes are not basically distributed between the first open end E1 and the feed point A, therefore, grounding the third grounding point D3 has virtually no impact on the resonant currents of the first and fourth resonant modes.

[0172] This embodiment sets a third grounding point D3 near the feed point A of the radiator 10 and interconnects the third grounding point D3 with the part of the middle plate that serves as the reference ground. This not only avoids the radiator 10 being suspended relative to the middle plate and improves the overall strength of the frame, but also does not affect the current distribution of the first resonance mode, the second resonance mode, the third resonance mode, and the fourth resonance mode.

[0173] This embodiment uses a first feed source 21 to excite the first radiating segment 11, the second radiating segment 12, the third radiating segment 13, and the parasitic radiating segment 14 to form a first resonant mode supporting a first frequency band and a second resonant mode supporting a second frequency band. This enables the radiator 10 to support mid-to-high frequency bands and maintain high efficiency over a wide mid-to-high frequency range, such as the B3 band, B39 band, B1 band, B40 band, B41 band, and Wi-Fi 2.4G band. Alternatively, the first feed source 21 can excite the first radiating segment 11, the second radiating segment 12, the third radiating segment 13, and the parasitic radiating segment 14 to form a first resonant mode supporting a first frequency band, a third resonant mode supporting a third frequency band, and a fourth resonant mode supporting a fourth frequency band. For example, the first feed source 21 and the second feed source 22 can excite the radiator 10 to support the Wi-Fi 2.4G band, the Wi-Fi 5G band, and the N78 band.

[0174] Please refer to Figure 23. One or more feed sources feed the radiator 10 from feed point A. A single feed source means that the feed source supports only one type of signal, such as MHB / Wi-Fi 2.4G / Wi-Fi 5G / N78, etc. Alternatively, a combiner 51 can be used to combine signals from multiple different frequency bands before feeding them to the feed source, such as Wi-Fi 2.4+Wi-Fi 5G, Wi-Fi 2.4+N78, MHB+Wi-Fi 5G, etc. Multiple feed sources mean that each feed source can achieve the frequency band combinations described above for a single feed source, which can be a single frequency band or a multi-frequency band combination. Then, two feed sources feed the radiator 10 from the same location. However, in practical applications, the choice between a shared spring plate or separate spring plate feeds can be determined based on the available structural space.

[0175] In Embodiment 1, the first feed 21 is a single feed 21, supporting an operating bandwidth of 1.71-2.7GHz, covering mid-to-high frequencies (LTE B3 / B39 / B1 / B40 / B41, and Wi-Fi 2.4G). The radiator 10 mainly includes the radiator 10 and a parasitic radiating segment. The radiator 10 includes a second radiating segment, a first radiating segment, and a third radiating segment arranged sequentially. A first coupling gap exists between the second and first radiating segments, and a second coupling gap G2 exists between the third radiating segment and the parasitic radiating segment. In some cases, depending on actual engineering requirements, it may be necessary to add a third grounding point D3 on the branch between the first coupling gap and the second coupling gap G2 to improve structural strength. In Embodiment 1, the first feed 21 operates in the MHB band. Based on the current distribution, the location of the third grounding point D3 should be as close as possible to the feed point A side to reduce the impact on the first feed 21. If the first feed 21 needs to operate in different frequency bands in different scenarios, in addition to adjusting the stub length from the first coupling slot to the second coupling slot G2, the position of the third grounding point D3 can also be adjusted. The main reason is that when the first feed 21 operates in different frequency bands, the current pattern distributed on the radiator 10 is different, meaning the distribution of strong and weak current points is different. To reduce the influence of the third grounding point D3 on the current pattern, it needs to be placed at the point of strong current. In this case, when the first feed 21 operates at mid-to-high frequencies (regardless of whether it's mid-frequency or high-frequency), the point of strong current is close to feed point A; therefore, the third grounding point D3 should be as close to feed point A as possible.

[0176] The working mechanism of the first feed source 21 is as follows: When the first feed source 21 is fed from feed point A, it can excite two modes near 1.8 GHz and 2.6 GHz. Near 2.56 GHz (mode 2 resonant frequency is higher), it excites the current distribution shown in Figure 6, with the current concentrated in the segment from feed point A to the first ground point D1, and the current in the branches at both ends of the first coupling gap is in phase, which is a common-mode. In addition, near 1.8 GHz (mode 1 resonant frequency is lower), the first feed source 21 also excites the current distribution shown in Figure 10, with the current energy mainly concentrated from feed point A to the second coupling gap G2, which is a quarter-wavelength resonant mode from feed point A to the gap. If there is a parasitic radiation segment from the second coupling gap G2 to the second ground point D2, a corresponding in-phase current can also be excited on the parasitic radiation segment, forming a common-mode current with higher radiation efficiency. The coupling amount between the third radiation segment and the parasitic radiation segment can be achieved by adjusting the size of the second coupling gap G2. The coupling amount between the second radiation segment and the first radiation segment can be achieved by adjusting the size of the first coupling gap.

[0177] Please refer to Figure 24, which shows the S-parameter curves of the first feed 21 excitation radiator 10 and parasitic radiation section 14 of the antenna assembly 100 provided in Figure 11 in the first and second frequency bands. It can be seen that the supported frequency band of the first feed 21 excitation radiator 10 and parasitic radiation section 14 has a large bandwidth, which can cover 1.7 to 2.7 GHz.

[0178] Please refer to Figure 25, which shows the system efficiency curves of the first feed 21 excitation radiator 10 and parasitic radiation section 14 of the antenna assembly 100 provided in Figure 11 in the first and second frequency bands. It can be seen that the first feed 21 excitation radiator 10 and parasitic radiation section 14 cover the first and second frequency bands from 1.7 to 2.7 GHz, and the efficiency in the 1.7 to 2.7 GHz range is greater than -4 dB. This indicates that the first feed 21 excitation radiator 10 and parasitic radiation section 14 have high efficiency across the entire MHB frequency band and the Wi-Fi 2.4 GHz band. The first feed 21 can achieve a high efficiency of over -3 dB in the MHB band.

[0179] In this structure, the feed point A of the first feed source 21 is close to the side of the second coupling gap G2, so the frequency of resonance 2 is higher than that of resonance 1. In practice, the stub length can be adjusted to achieve different resonant frequencies according to different needs.

[0180] Example 2 is a dual-fed antenna, with the first feed source 21 and the second feed source 22 sharing a common spring feed at feed point A. The length from feed point A to the first coupling slot is less than the length from the second coupling slot G2 to the second ground point D2. The first feed source 21 can excite Wi-Fi 2.4G (third band) and Wi-Fi 5G (first band), while the second feed source 22 excites the N78 band (fourth band). The current distribution of Wi-Fi 2.4G (third band) is a half-wavelength mode from the first coupling slot to the second coupling slot G2, and the current mode of N78 (fourth band) is a quarter-wavelength mode from the first coupling slot to the first ground point D1. Wi-Fi 5G (first band) is a common-mode mode from feed point A to the second ground point D2 (or a quarter-wavelength mode if there is no parasitic radiation segment from the gap to the second ground point D2).

[0181] Please refer to Figure 26, which shows the S-parameter curves of the frequency bands supported by the excitation radiator 10 of the antenna assembly 100 provided in Figure 23, specifically the first feed 21 and the second feed 22. Curve a1 represents the S-parameter curves of the first feed 21 excitation radiator 10 supporting the first and third frequency bands. Curve a2 represents the S-parameter curve of the second feed 22 excitation radiator 10 supporting the fourth frequency band. Curve a3 represents the isolation curve between the first feed 21 and the second feed 22. It can be seen that the frequency bands supported by the first feed 21 excitation radiator 10 have a large bandwidth, covering 1.7–2.7 GHz, 3.3–3.8 GHz, and 5.1–5.8 GHz.

[0182] Please refer to Figure 27, which shows the efficiency curves of the supported frequency bands for the excitation radiators 10 of the antenna assembly 100 provided in Figure 23, specifically the first feed 21 and the second feed 22. Curve a1 represents the radiation efficiency curve for the first and third frequency bands supported by the excitation radiator 10 of the first feed 21. Curve a2 represents the overall efficiency curve for the fourth frequency band supported by the excitation radiator 10 of the second feed 22. Curve b1 represents the system efficiency curve for the first and third frequency bands supported by the excitation radiator 10 of the first feed 21. Curve b2 represents the overall efficiency curve for the fourth frequency band supported by the excitation radiator 10 of the second feed 22. It can be seen that the supported frequency bands covered by the excitation radiators 10 of the first feed 21 and the second feed 22 have efficiencies greater than -4dB in the 1.7–2.7 GHz and 3.3–3.8 GHz ranges, and greater than -6dB in the 5.1–5.8 GHz range. This indicates that the first feed 21 and the second feed 22 excite the radiator 10 to have high efficiency in the ranges of 1.7–2.7 GHz, 3.3–3.8 GHz, and 5.1–5.8 GHz.

[0183] The antenna assembly 100 provided in this application covers a large bandwidth by exciting a variety of different resonant modes on the radiator 10, in order to meet the requirements of LTE B3 / B1 / B39 / B40 / B41 and Wi-Fi 2.4G / 5G bands, N78 band, etc., and occupies a small space.

[0184] Example 3 is a dual-fed antenna, fed by a common spring at feed point A. The first feed source 21 can excite Wi-Fi 2.4G (third band) and N78 (fourth band). The RF signals from the Wi-Fi 2.4G and N78 bands are combined into a single signal by combiner 51 after exiting their respective chips. The second feed source 22 excites the Wi-Fi 5G band (first band). The current distribution of the Wi-Fi 2.4G (third band) is a half-wavelength mode from the first coupling gap to the second coupling gap G2, and the current distribution of the N78 (fourth band) is a quarter-wavelength mode from the second coupling gap G2 to the second ground point D2. The Wi-Fi 5G (first band) is a common-mode mode from feed point A to the second ground point D2 (or a quarter-wavelength mode if there is no parasitic radiation segment from the gap to the second ground point D2).

[0185] The frequency band combinations mentioned in the above cases can all be replaced with other combinations, and this can be achieved by adjusting the antenna stub length and matching circuit.

[0186] The first grounding point D1, the second grounding point D2, and the third grounding point D3 can be replaced by returning to ground through a matching circuit. An LC circuit or switch can be added for further tuning.

[0187] 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, wherein, include: The radiator includes a first open end, a feed point, a second open end, a third open end, and a first grounding point, wherein the second open end and the third open end are connected by a first coupling gap. A first feed source is electrically connected to the feed point; the first feed source is used to excite the radiator to form a first resonant mode supporting a first frequency band; the resonant current of the first resonant mode is mainly distributed between the feed point and the first ground point; the direction of the resonant current of the first resonant mode between the feed point and the second opening end is the same as the direction of the resonant current between the third opening end and the first ground point; the first frequency band covers at least a portion of the mid-high frequency band or ultra-high frequency band.

2. The antenna assembly as claimed in claim 1, wherein, The distance between the power supply point and the second open end is greater than or equal to the distance between the third open end and the first grounding point.

3. The antenna assembly as claimed in claim 1, wherein, The antenna assembly further includes a parasitic radiation section, which includes a fourth opening and a second grounding point, and a second coupling gap between the fourth opening and the first opening.

4. The antenna assembly as claimed in claim 3, wherein, The first feed source is also 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 feed point and the second ground point. The second frequency band covers at least part of the mid-to-high frequency band.

5. The antenna assembly as claimed in claim 4, wherein, The center frequency of the second frequency band is less than the center frequency of the first frequency band; the direction of the resonant current in the second resonant mode between the feed point and the first opening end is the same as the direction of the resonant current between the fourth opening end and the second grounding point.

6. The antenna assembly as claimed in claim 5, wherein, The length of the parasitic radiation segment is less than or equal to the distance between the feed point and the first opening end.

7. The antenna assembly as claimed in claim 3, wherein, The width of the second coupling gap is less than or equal to the width of the first coupling gap.

8. The antenna assembly as claimed in claim 6, wherein, The first frequency band and the second frequency band form a continuous frequency band, which covers 1.71-2.7 GHz.

9. The antenna assembly as described in any one of claims 1 to 3, wherein, The first feed source is also used to excite the formation of a third resonant mode supporting the third frequency band between the first open end and the second open end.

10. The antenna assembly of claim 9, wherein, The third resonant mode includes the half-wavelength mode of the third frequency band.

11. The antenna assembly of claim 9, wherein, The antenna assembly also includes: Second feed source; A first matching circuit, electrically connected between the feed point and the first feed source; and The second matching circuit is electrically connected between the feed point and the second feed source. The distance between the feed point and the second opening is less than the distance between the feed point and the first opening. The second feed source is also used to excite the fourth opening to the second ground point to support the fourth resonant mode of the fourth frequency band.

12. The antenna assembly of claim 11, wherein, The fourth resonant mode includes the 1 / 4 wavelength mode of the fourth frequency band.

13. The antenna assembly of claim 11, wherein, The first frequency band includes the Wi-Fi 5G band, the third frequency band includes the Wi-Fi 2.4G band, and the fourth frequency band includes the N78 band.

14. The antenna assembly of claim 11, wherein, The antenna assembly also includes: A combiner, wherein a first sub-terminal of the combiner is electrically connected to the first feed source, a second sub-terminal of the combiner is electrically connected to the second feed source, and a third sub-terminal of the combiner is electrically connected to the feed point; A first radio frequency front-end circuit is electrically connected between the first feed and the first sub-terminal of the combiner. The first radio frequency front-end circuit is used to amplify the antenna signal of the third frequency band. The second radio frequency front-end circuit is electrically connected to the first feed and the first matching circuit, and is used to amplify the antenna signal of the first frequency band.

15. The antenna assembly of claim 11, wherein, The first matching circuit includes a first band-stop circuit, wherein the first band-stop circuit is a band-stop circuit of the fourth frequency band; and / or, The second matching circuit includes a second band-stop circuit and a first band-pass circuit. The second band-stop circuit is a band-stop circuit for the third frequency band, and the first band-pass circuit is a band-pass circuit for the first frequency band. The first band-pass circuit is grounded.

16. The antenna assembly of claim 15, wherein, The first matching circuit includes a first matching element, one end of which is electrically connected to the feed point. The first resistive circuit includes a first resistive element and a second resistive element, one end of which is electrically connected to the other end of the first matching element, one end of which is electrically connected to the other end of the first matching element, and the other ends of the first and second resistive elements are electrically connected to the first feed source.

17. The antenna assembly of claim 16, wherein, The second matching circuit includes a second matching element, a third matching element, a fourth matching element, and a fifth matching element. One end of the second matching element is electrically connected to the feed point, and the other end of the second matching element is grounded. The second resistor circuit includes a third resistor element and a fourth resistor element. One end of the third resistor element is electrically connected to one end of the second matching element, and the other end of the third resistor element is electrically connected to one end of the third matching element. One end of the fourth resistor element is electrically connected to one end of the second matching element, and the other end of the fourth resistor element is electrically connected to one end of the third matching element. One end of the fourth matching element is electrically connected to the other end of the third matching element, the other end of the fourth matching element is electrically connected to one end of the fifth matching element, and the other end of the fifth matching element is electrically connected to the second feed source; One end of the first bandpass circuit is electrically connected to the other end of the third matching element, and the other end of the first bandpass circuit is grounded.

18. The antenna assembly of claim 17, wherein, The first bandpass circuit includes a first bandpass sub-element and a second bandpass sub-element. One end of the first bandpass sub-element is electrically connected to the other end of the third matching element, the other end of the first bandpass sub-element is electrically connected to one end of the second bandpass sub-element, and the other end of the second bandpass sub-element is grounded.

19. The antenna assembly according to any one of claims 1 to 18, wherein, The radiator further includes a third grounding point, which is located between the feed point and the first opening end, and the distance between the third grounding point and the feed point is less than the distance between the third grounding point and the first opening end.

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

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