Antenna assembly and electronic equipment

Abstract

The invention provides an antenna assembly and electronic equipment, the antenna assembly comprises a first radiator and a first feed source system, the first radiator comprises a first radiation branch knot, a second radiation branch knot and a first equivalent resonance circuit, the first radiation branch knot comprises a first opening end, a first feed point, a connection point and a second opening end, the second radiation branch knot comprises a third opening end, a coupling section and a first grounding point, a first coupling gap is formed between the third opening end and the second opening end, and the first grounding point is grounded; one end of the first equivalent resonance circuit is connected with the connection point, and the other end of the first equivalent resonance circuit is electrically coupled with the coupling section; the first feed source system is used for exciting the first radiator to generate a first resonant mode supporting a first frequency band and generate a second resonant mode supporting a second frequency band; the resonant frequency of the first equivalent resonant circuit is smaller than the center frequency of the second frequency band and larger than the center frequency of the first frequency band, so that more frequency bands are supported through the same antenna radiator.

Description

Technical Field

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

[0002] Currently, antennas in mobile phones and other electronic devices generally need to cover multiple cellular or Wi-Fi bands. The goal is to cover as many bands as possible within a small size, leaving more space and design freedom for other antenna layouts. How to design multiple bands on a single antenna radiator has become a technical problem that needs to be solved. Summary of the Invention

[0003] This application provides an antenna assembly that can design more frequency bands on the same antenna radiator and an electronic device having the antenna assembly.

[0004] In a first aspect, this application provides an antenna assembly, including: The first radiator includes a first radiating stub, a second radiating stub, and a first equivalent resonant circuit. The first radiating stub includes a first open end, a first feed point, a connection point, and a second open end. The second radiating stub includes a third open end, a coupling section, and a first grounding point. A first coupling gap is formed between the third open end and the second open end. The first grounding point is grounded. One end of the first equivalent resonant circuit is connected to the connection point, and the other end of the first equivalent resonant circuit is electrically coupled to the coupling section. The first feed system is electrically connected to the first feed point. The first feed system is used to excite the first radiator to generate a first resonant mode supporting the first frequency band and a second resonant mode supporting the second frequency band. The resonant frequency of the first equivalent resonant circuit is less than the center frequency of the second frequency band and greater than the center frequency of the first frequency band.

[0005] The antenna assembly provided in this application includes a first radiator and a first feed system. The first radiator includes a first radiating stub, a second radiating stub, and a first equivalent resonant circuit. The first radiating stub includes a first open end, a first feed point, a connection point, and a second open end. The second radiating stub includes a third open end, a coupling section, and a first grounding point. A first coupling gap exists between the third open end and the second open end, and the first grounding point is grounded. One end of the first equivalent resonant circuit is connected to the connection point, and the other end of the first equivalent resonant circuit is electrically coupled to the coupling section. The first feed system is electrically connected to the first feed point. The first feed system is used to excite the first radiator to generate a first resonant mode supporting a first frequency band and a second resonant mode supporting a second frequency band. The resonant frequency of the first equivalent resonant circuit is lower than the center frequency of the second frequency band and higher than the center frequency of the first frequency band, so as to generate resonant modes supporting more frequency bands and supporting more frequency bands through the same antenna radiator.

[0006] Secondly, this application provides an electronic device including an antenna assembly as described in the first aspect. Attached Figure Description

[0007] 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.

[0008] Figure 1 This is a three-dimensional schematic diagram of an electronic device provided in an embodiment of this application; Figure 2 This is an exploded view of the structure of an electronic device provided in an embodiment of this application; Figure 3 This is a top view of the back cover side of an electronic device provided in an embodiment of this application; Figure 4 This is a schematic diagram of an antenna assembly provided in an embodiment of this application. Figure 1 ; Figure 5 This is a schematic diagram of a first feed system in an antenna assembly provided in an embodiment of the present application, including a first feed and a second feed; Figure 6 This is a schematic diagram of an antenna assembly provided in this application, in which a first matching circuit includes a first filter element and a second matching circuit includes a second filter element; Figure 7 This is a topological schematic diagram of a first filter element and a second filter element in an antenna assembly provided in an embodiment of this application; Figure 8 This is a topological schematic diagram of the first equivalent resonant circuit and the first coupling gap being equivalent to a second equivalent capacitor element provided in the embodiments of this application; Figure 9 This is a schematic diagram of the topology of a second equivalent resonant circuit provided in an embodiment of this application; Figure 10 This is a schematic diagram of an auxiliary radiating branch provided in an embodiment of this application; Figure 11 This is a three-dimensional structural schematic diagram of an auxiliary radiating branch provided in an embodiment of this application; Figure 12 This is a schematic diagram of the first sub-current distribution when the first feed excites the first radiator to support the first sub-frequency band, as provided in the embodiments of this application. Figure 13 This is a schematic diagram of the second sub-current distribution when the first feed excites the first radiator to support the second sub-frequency band, provided in an embodiment of this application. Figure 14 This is a schematic diagram of the third sub-current distribution when the first feed excites the first radiator to support the third sub-frequency band, as provided in the embodiments of this application. Figure 15This is a schematic diagram of the fourth sub-current distribution when the first feed excites the first radiator to support the fourth sub-band, as provided in the embodiments of this application. Figure 16 This is a schematic diagram of the fifth sub-current distribution when the first feed excites the first radiator to support the fifth sub-frequency band, provided in an embodiment of this application. Figure 17 This is a topology diagram of the antenna assembly provided in the embodiments of this application, which also includes a first switching tuning circuit; Figure 18 This is a topology diagram of the antenna assembly provided in the embodiments of this application, which also includes a second switching tuning circuit; Figure 19 The antenna assembly provided in this application embodiment also includes a second radiator and a second feed system. (Topology diagram) Figure 20 This is a schematic diagram of the topology of an antenna assembly provided in an embodiment of this application; Figure 21 yes Figure 20 An equivalent schematic diagram of an antenna assembly is provided; Figure 22 This is a schematic diagram of the structure of an antenna assembly provided in an embodiment of this application; Figure 23 yes Figure 20 The S-parameter curves of the provided antenna assembly; Figure 24 for Figure 20 The simulation efficiency of the provided antenna components; Figure 25 This is a current simulation diagram of the antenna assembly provided in this application in the first sub-band (1.7GHz frequency); Figure 26 This is a current simulation diagram of the antenna assembly provided in this application in the second sub-band (2.5GHz frequency); Figure 27 This is a current simulation diagram of the antenna assembly provided in this application in the third sub-band (2.8GHz frequency); Figure 28 This is a current simulation diagram of the antenna assembly provided in this application in the fourth sub-band (5GHz frequency); Figure 29 This is a schematic diagram of the resonant current distribution on the resistive structure provided in this application; Figure 30 This is a current simulation diagram of the antenna assembly provided in this application in the fifth sub-band (5.6GHz frequency); Figure 31 This is a first comparative structural diagram provided in this application; Figure 32 It is the first pair of proportions and Figure 20The efficiency comparison curves of the antenna components shown are displayed in the MHB band. Figure 33 It is the first pair of proportions and Figure 20 The efficiency comparison curves of the antenna components shown are for the Wi-Fi 5G band. Figure 34 It is the second pair of proportions and Figure 20 The diagram shows the structure of the antenna assembly. Figure 35 It is the second pair of proportions and Figure 20 The efficiency comparison curves of the antenna components shown are displayed in the MHB band. Figure 36 It is the second pair of proportions and Figure 20 The diagram shows the efficiency comparison curves of the antenna components in the Wi-Fi 5G band. Detailed Implementation

[0009] 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.

[0010] 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.

[0011] Please see Figure 2 , Figure 2This is a partially exploded view of the electronic device 1000 provided in this application embodiment. The electronic device 1000 includes an antenna assembly 100. Taking a mobile phone as an example, the working environment of the antenna assembly 1000 is illustrated. The electronic device 1000 includes a display screen 200, a middle frame 300, and a back cover 400 arranged sequentially along the thickness direction. The middle frame 300 includes a middle plate 310 and a bezel 320. The bezel 320 surrounds the display screen 200, the middle plate 310, and the back cover 400. The bezel 320 is a conductive bezel, such as a metal bezel. There are receiving spaces between the display screen 200 and the middle plate 310, and between the middle plate 310 and the back cover 400, to accommodate a motherboard 600, a camera module, a receiver module, a battery 700, a sub-board 800, and various sensors and other devices. The bezel 320 surrounds the edge of the display screen 200 on one side along its thickness direction, and surrounds the edge of the back cover 400 on the other side along its thickness direction, forming a complete external structure of the electronic device 1000. In this embodiment, the bezel 320 and the middle plate 310 are an integral structure, for example, formed by processing a metal sheet. The bezel 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.

[0012] Please see Figure 3 , Figure 3 This 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, a first side frame 322, a bottom frame 324, and a second side frame 323 connected sequentially. The top frame 321 and bottom frame 324 are positioned opposite each other, and the first side frame 322 and second side frame 323 are connected between the top frame 321 and the bottom frame 324 and positioned opposite each other. Specifically, the top frame 321 is the side away from the ground when the user holds and uses the electronic device 1000 in portrait mode (screen facing the user), and the bottom frame 324 is the side facing the ground when the user holds and uses the electronic device 1000 in portrait mode (screen facing the user). The first side frame 322 is the right side when the user holds and uses the electronic device 1000 in portrait mode (screen facing the user). The second side frame 323 is the left side when the user holds and uses the electronic device 1000 in portrait mode (screen facing the user). Alternatively, the first side frame 322 can also be the left side when the user holds and uses the electronic device 1000 in portrait mode (screen facing the user). The second side frame 323 is the right side when the user holds and uses the electronic device 1000 (screen facing the user).

[0013] 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.

[0014] Please see Figure 3 and Figure 4 The electronic device 1000 also includes a reference ground plane 500. The reference ground plane 500 is located within the area enclosed by the frame 320. The reference ground plane 500 is generally rectangular in shape. Various slots, holes, etc., are formed on the reference ground plane 500's reference ground edge as needed to accommodate components or avoid other structures within the mobile phone. The reference ground plane 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).

[0015] For details, please refer to Figure 3 and Figure 4 The reference floor 500 includes a first floor edge 510, a second floor edge 520, a third floor edge 530, and a fourth floor edge 540 connected end to end. The first floor edge 510 is positioned opposite to the top frame 321. The second floor edge 520 is positioned opposite to the first side frame 322. The third floor edge 530 is positioned opposite to the second side frame 323. The fourth floor edge 540 is positioned opposite to the bottom frame 324.

[0016] The specific structure of the antenna assembly 100 provided in Embodiment 1 will be illustrated below with reference to the accompanying drawings.

[0017] Please see Figure 3 and Figure 4 The antenna assembly 100 includes a first radiator 10 and a first feed system 20.

[0018] This application does not specifically limit the material of the first radiator 10. Optionally, the first 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 first radiator 10. For example, the shape of the first radiator 10 may include, but is not limited to, strips, sheets, rods, coatings, and films. Figure 3The first radiator 10 shown is merely an example and does not limit the shape of the first radiator 10 provided in this application. In this embodiment, the first radiator 10 is strip-shaped. This application does not limit the extension trajectory of the first radiator 10. Optionally, the first radiator 10 may extend along a straight line, a curve, or a bend. The first radiator 10 described above may be a line of uniform width on its extension trajectory, or it may be a strip of varying width, such as one with a gradually changing width or a widened region.

[0019] This application does not specifically limit the form of the first radiator 10. Optionally, the form of the first radiator 10 includes, but is not limited to, a metal frame 320, a metal frame embedded in a plastic frame 320, a metal radiator located 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 first radiator 10 is taken as part of the metal frame 320 of the electronic device 1000.

[0020] This application does not specify the exact location of the first radiator 10 on the metal frame 320. For example, the first radiator 10 may be located on the top frame 321, the first side frame 322, the second side frame 323, the bottom frame 324, or the four corners, etc.

[0021] This application takes the first radiator 10 located at the first side frame 322 as an example. The first radiator 10 is arranged at intervals along the second floor edge 520. The extending direction of the first radiator 10 is parallel to the extending direction of the second floor edge 520.

[0022] Please see Figure 3 and Figure 4 The first radiator 10 includes a first radiating branch 11, a second radiating branch 12, and a first equivalent resonant circuit 21.

[0023] Please see Figure 3 and Figure 4 The first radiating branch 11 includes a first open end E1, a first feed point A1, a connection point H1, and a second open end E2.

[0024] Specifically, the second opening end E2 and the first opening end E1 are the two ends of the first radial branch 11. Neither the first opening end E1 nor the second opening end E2 is directly connected to the reference floor 500; they are disconnected.

[0025] For details, please refer to Figure 3 and Figure 4 The first radiating branch 11 is a section on the metal frame 320. The first feed point A1 is a portion of the first radiating branch 11. To facilitate the connection between the first feed point A1 and the first feed system 20, a small protrusion can be provided on the inner wall of the first radiating branch 11 at the location of the first feed point A1, so as to electrically connect with the first feed system 20 on the main board 600 through a feed spring. Of course, in other embodiments, the small protrusion may not be provided at the location of the first feed point A1.

[0026] This application does not specify the exact location of the first feed point A1 between the second open end E2 and the first open end E1. Optionally, the first feed point A1 may be adjacent to the first open end E1.

[0027] Please see Figure 3 and Figure 4 The second radiating stub 12 includes a first grounding point D1, a coupling segment H2, and a third open end E3. The coupling segment H2 may be located between the first grounding point D1 and the third open end E3. Furthermore, the coupling segment H2 may be a part of the second radiating stub 12. This application does not specifically limit the length and position of the coupling segment H2.

[0028] The coupling segment H2 can be a small region, close to a connection point H1 on the second radiating stub 12. Alternatively, it can be a small segment on the second radiating stub 12.

[0029] The third open end E3 and the first grounding point D1 are the two ends of the second radiating branch 12. The third open end E3 is not directly connected to the reference floor 500, that is, it is disconnected.

[0030] Please see Figure 3 and Figure 4 The first coupling gap G1 is located between the third opening end E3 and the second opening end E2. The first coupling gap G1 can be a seam on the frame. During the frame forming process, an insulating medium can be filled into the first coupling gap G1 to ensure the overall structural strength of the frame. The width of the first coupling gap G1 can be 0.5~2mm. The first radial branches 11 and the second radial branches 12 on both sides of the first coupling gap G1 can transmit electrical signals even without a direct physical connection.

[0031] The first grounding point D1 is grounded. That is, the first grounding point D1 is electrically connected to the reference ground 500.

[0032] Please see Figure 3 and Figure 4One end of the first equivalent resonant circuit 21 is connected to connection point H1, and the other end of the first equivalent resonant circuit 21 is electrically coupled to the coupling segment H2 of the second radiating stub 12. The electrical coupling connection between the other end of the first equivalent resonant circuit 21 and the second radiating stub 12 means that the other end of the first equivalent resonant circuit 21 is directly connected to the second radiating stub 12 to transmit electrical signals or is capacitively coupled to transmit electrical signals.

[0033] The first equivalent resonant circuit 21 includes, but is not limited to, a resonant circuit formed by an inductor or a capacitor, and also includes an equivalent resonant circuit that is equivalent to an inductor and an equivalent distributed capacitance.

[0034] The first equivalent resonant circuit 21 can be an LC resonant circuit. The first equivalent resonant circuit 21 has different impedance properties in different frequency bands, thereby changing the boundary conditions of the first equivalent resonant circuit 21 in different frequency bands to excite resonant modes that support multiple different frequency bands, so as to design more frequency bands on the same antenna radiator.

[0035] As mentioned above, please refer to Figure 3 and Figure 4 The antenna assembly 100 also includes a first feed system 20.

[0036] Please see Figure 3 and Figure 4 The first feed system 20 is electrically connected to the first feed point A1. Electrical connections in this application include direct electrical connections between two structures, or indirect electrical connections via other components. In this embodiment, the first feed system 20 and the first feed point A1 are indirectly electrically connected via radio frequency transmission lines, feed springs, etc.

[0037] Among them, the first radiating stub 11 is a feed stub, and the second radiating stub 12 is a parasitic stub. Since the first radiating stub 11 and the second radiating stub 12 can be coupled together, and the first equivalent resonant circuit 21 is electrically connected to the first radiating stub 11 and electrically coupled to the second radiating stub 12, the first radiating stub 11, the second radiating stub 12, and the first equivalent resonant circuit 21 can be considered as a whole. This whole can generate multiple resonant modes in different frequency bands.

[0038] The first feed system 20 includes, but is not limited to, radio frequency transceiver chips, radio frequency front-end modules, etc.

[0039] The first feed system 20 is used to excite the first radiator 10 to generate a first resonant mode supporting a first frequency band and a second resonant mode supporting a second frequency band.

[0040] Specifically, the first feed system 20 is used to provide radio frequency signals for at least the first frequency band and the second frequency band. The first feed system 20 may be one feed or two feeds.

[0041] For example, please see Figure 5 The first feed system 20 includes a first feed 211 and a second feed 212. The first feed 211 is used to provide radio frequency signals in a first frequency band. The second feed 212 is used to provide radio frequency signals in a second frequency band.

[0042] Further optional information can be found in [link to relevant documentation]. Figure 5 The antenna assembly 100 also includes a first matching circuit M1 and a second matching circuit M2.

[0043] The first matching circuit M1 is electrically connected between the first feed source 211 and the first feed point A1. The first matching circuit M1 includes at least one of a capacitor, an inductor, and a resistor, and is used to achieve impedance matching between the port of the first feed source 211 (the aforementioned feed port) and the first radiating stub 11. The second matching circuit M2 includes at least one of a capacitor, an inductor, and a resistor, and is used to achieve impedance matching between the port of the second feed source 212 (the aforementioned feed port) and the first radiating stub 11.

[0044] The first feed source 211 and the second feed source 212 are electrically connected to the same first feed point A1, that is, the first feed source 211 and the second feed source 212 achieve co-feeding. Compared with the implementation method in which the first feed source 211 and the second feed source 212 are fed through two different first feed points A1, the shared feed point structure simplifies the signal transmission path, reduces power attenuation caused by multiple feed line connections, and reduces signal transmission loss.

[0045] In this embodiment, by designing the equivalent inductance and equivalent capacitance in the first equivalent resonant circuit 21, the resonant frequency of the first equivalent resonant circuit 21 is located within a preset range. Thus, the first equivalent resonant circuit 21 has different characteristics for the first frequency band and the second frequency band. Consequently, when the first radiator 10 resonates in the first frequency band and the second frequency band, the first equivalent resonant circuit 21 has different boundary conditions, thereby forming different resonant modes in the first frequency band and the second frequency band.

[0046] Specifically, the resonant frequency of the first equivalent resonant circuit 21 is less than the center frequency of the second frequency band and greater than the center frequency of the first frequency band. Optionally, the resonant frequency of the first equivalent resonant circuit 21 is located between the maximum frequency of the first frequency band and the minimum frequency of the second frequency band. Thus, the first equivalent resonant circuit 21 is equivalent to a capacitor for the first frequency band, and the second equivalent resonant circuit is equivalent to an inductor for the second frequency band.

[0047] This application does not specifically limit the size of the first frequency band. Optionally, the first frequency band may include, but is not limited to, at least one of the following: LB band (less than 1 GHz), MHB band (1.7-2.7 GHz), Wi-Fi 2.4 GHz band, UHB band (greater than 3 GHz), Wi-Fi 5 GHz band, and GPS band. For example, the first frequency band may be a 1.7-2.7 GHz band. As a further example, the first frequency band may be at least one of the following: Wi-Fi 2.4 GHz band and MHB band.

[0048] This application does not specifically limit the size of the second frequency band. Optionally, the second frequency band may include, but is not limited to, at least one of the following: LB band (less than 1 GHz), MHB band (1.7-2.7 GHz), Wi-Fi 2.4 GHz band, UHB band (greater than 3 GHz), Wi-Fi 5 GHz band, and GPS band. For example, the second frequency band may be a band greater than 3 GHz. As a further example, the second frequency band may be a Wi-Fi 5 GHz band.

[0049] The resonant frequency of the first equivalent resonant circuit 21 is located between the MHB band and the Wi-Fi 5G band. The first equivalent resonant circuit 21 is equivalent to a capacitor for the MHB band and an inductor for the Wi-Fi 5G band.

[0050] The antenna assembly 100 provided in this application includes a first radiator 10 and a first feed system 20. The first radiator 10 includes a first radiating stub 11, a second radiating stub 12, and a first equivalent resonant circuit 21. The first radiating stub 11 includes a first opening end E1, a first feed point A1, a connection point H1, and a second opening end E2. The second radiating stub 12 includes a third opening end E3, a coupling section H2, and a first grounding point D1. A first coupling gap G1 is formed between the third opening end E3 and the second opening end E2. The first grounding point D1 is grounded. One end of the equivalent resonant circuit 21 is connected to connection point H1, and the other end of the first equivalent resonant circuit 21 is electrically coupled to coupling section H2; the first feed system 20 is electrically connected to the first feed point A1, and the first feed system 20 is used to excite the first radiator 10 to generate a first resonant mode supporting the first frequency band and a second resonant mode supporting the second frequency band; the resonant frequency of the first equivalent resonant circuit 21 is less than the center frequency of the second frequency band and greater than the center frequency of the first frequency band, so as to generate resonant modes supporting more frequency bands and supporting more frequency bands through the same antenna radiator.

[0051] This application does not limit the first frequency band and the second frequency band.

[0052] Generally, since there is a one-to-one correspondence between frequency and the length of radiating branches, it is difficult for an antenna to have high radiation efficiency in two frequency bands with large intervals. However, the antenna assembly 100 provided in this application is designed so that the resonant frequency of the first equivalent resonant circuit 21 is lower than the center frequency of the second frequency band and higher than the center frequency of the first frequency band. That is, the first equivalent resonant circuit 21 can be equivalent to an inductor in the first frequency band and a capacitor in the second frequency band. This allows the first equivalent resonant circuit 21 to have different boundary conditions in the first and second frequency bands, thereby forming different resonant modes in the first and second frequency bands.

[0053] Furthermore, the center frequency of the second frequency band is 1.5 to 3 times that of the center frequency of the first frequency band. In other words, the antenna assembly 100 can have high radiation efficiency in both frequency bands with a large interval (1.5 to 3 times).

[0054] Specifically, the center frequency of the second frequency band can be any one of the following, or any data between any two adjacent values: 1.5, 1.6, 1.7, 1.8, 1.9, 2.0, 2.1, 2.2, 2.3, 2.4, 2.5, 2.6, 2.7, 2.8, 2.9, or 3.0 times the center frequency of the first frequency band.

[0055] Alternatively, the center frequency of the second frequency band is approximately twice the center frequency of the first frequency band.

[0056] The antenna assembly 100 provided in this application, through the above design, enables the antenna assembly 100 to support two significantly different frequency bands through the same radiator, both of which have relatively high efficiency and save space.

[0057] For example, the first frequency band could be the mid-to-high frequency MHB (1-3GHz) band, and the second frequency band could be the Wi-Fi 5G band.

[0058] For example, the first frequency band could be the low-frequency band LB (0.6-0.9GHz), and the second frequency band could be the mid-frequency band MB (1-1.7GHz).

[0059] For example, the first frequency band could be the mid-to-high frequency MHB (1-3GHz) band, and the second frequency band could be the N79 band.

[0060] For example, the first frequency band could be the mid-to-high frequency GPS-L1 band, and the second frequency band could be the N78 band.

[0061] Currently, a single antenna on the edge of a mobile phone typically needs to cover multiple cellular or Wi-Fi bands. The goal is to cover as many bands as possible within a small size, leaving more space and design freedom for other antenna layouts. Furthermore, if a single feed point can simultaneously achieve high performance across multiple bands to meet multi-standard requirements, no additional switching switches are needed, saving costs for the entire RF system. However, existing edge-mounted multi-band co-location antenna technologies struggle to simultaneously cover a wide bandwidth spanning from 1.71GHz to 5.85GHz, including both cellular HB (1.71-2.69GHz) and Wi-Fi bands (Wi-Fi 2.4G and Wi-Fi 5G). Therefore, achieving miniaturized multi-band wideband design with a single antenna is of significant research value.

[0062] The antenna assembly 100 provided in this application, through the above design concept, uses a single feed point to achieve a single radiating stub in a small-sized metal frame antenna that can simultaneously support multiple frequency bands such as cellular MHB + Wi-Fi 2.4G & 5G bands, and can keep each frequency band always available (so as to flexibly switch between cellular and Wi-Fi bands).

[0063] Further optionally, as described above, the power supply system includes a first feed source 211 and a second feed source 212. The first feed source 211 is used to provide an excitation signal for a first frequency band. The second feed source 212 is used to provide an excitation signal for a second frequency band.

[0064] Please see Figure 6 The first matching circuit M1 is electrically connected between the first feed point A1 and the first feed source 211. The first matching circuit M1 includes a first filtering component 41. The first filtering component 41 is used to allow the first frequency band to pass through and block at least a portion of the second frequency band from passing through.

[0065] The first filter device 41 includes at least one of an inductor, a capacitor, or a resistor.

[0066] Please see Figure 7Taking the first frequency band as the MHB band and the second frequency band as the Wi-Fi 5G band as an example, the first filter device 41 may include a first sub-inductor device L01 and a first sub-capacitor device C01. The first sub-inductor device L01 and the first sub-capacitor device C01 are connected in series between the first feed source 211 and the first feed point A1. The series circuit formed by the first sub-inductor device L01 and the first sub-capacitor device C01 is used to allow the MHB band to pass through and block at least a portion of the Wi-Fi 5G band from passing through. The first sub-inductor device L01 is an inductor device with a relatively large inductance value, and the first sub-capacitor device C01 is a capacitor device with a relatively small capacitance value. For example, the inductance value of the first sub-inductor device L01 is about 6nH, and the inductance value of the first sub-capacitor device C01 is about 0.5pF. The first sub-inductor device L01 is equivalent to an open circuit for the Wi-Fi 5G band, thereby blocking at least a portion of the Wi-Fi 5G band from passing through.

[0067] Please see Figure 6 The second matching circuit M2 is electrically connected between the first feed point A1 and the second feed source 212. The second matching circuit M2 includes a second filter element 42. The second filter element 42 is used to allow the second frequency band to pass and block at least a portion of the first frequency band from passing.

[0068] The second filter device 42 includes at least one of an inductor, a capacitor, or a resistor.

[0069] Please see Figure 7 Taking the first frequency band as the MHB band and the second frequency band as the Wi-Fi 5G band as an example, the second filter device 42 may include a second sub-capacitor device C02. The second sub-capacitor device C02 is connected between the second feed source 212 and the first feed point A1. The second sub-capacitor device C02 is used to allow the second frequency band to pass through and block at least part of the first frequency band from passing through. The second sub-capacitor device C02 includes a capacitor with a relatively small capacitance value. For example, the inductance value of the second sub-capacitor device C02 is about 0.15-0.3pF.

[0070] This embodiment reduces the impact of the second frequency band on the first feed 211 by providing a first filter element 41 in the first matching circuit M1 to allow the first frequency band to pass through and block at least part of the second frequency band from passing through; and reduces the impact of the first frequency band on the second feed 212 by providing a second filter element 42 in the second matching circuit M2 to allow the second frequency band to pass through and block at least part of the first frequency band from passing through. The above can improve the isolation between the first frequency band and the second frequency band of the antenna assembly 100, thereby improving the efficiency of the first frequency band and the second frequency band.

[0071] The following example illustrates the specific design of the first equivalent resonant circuit 21 with reference to the accompanying drawings.

[0072] Optional, please refer to Figure 8 The first equivalent resonant circuit 21 includes a first equivalent inductor element L11 and a first equivalent capacitor element C11. In other words, the first equivalent resonant circuit 21 can be equivalent to an LC resonant circuit.

[0073] One end of the first equivalent inductor element L11 is electrically connected to connection point H1, the other end of the first equivalent inductor element L11 is electrically connected to one end of the first equivalent capacitor, and the other end of the first equivalent capacitor is electrically connected to coupling segment H2.

[0074] The first equivalent inductor element L11 is, but is not limited to, any one of the following: an inductor device, a distributed inductance structure, a wire loop, or a planar spiral structure. The distributed inductance structure includes, but is not limited to, a metal strip or a PCB trace. When the length of the conductive metal is much greater than its width, the conductive metal can be considered equivalent to a distributed inductance.

[0075] The first equivalent capacitance element C11 includes, but is not limited to, a capacitor element or a distributed capacitance element formed by parallel metal plates.

[0076] The inductance of the first equivalent inductor element L11 is L1, and the capacitance of the first equivalent capacitor element C11 is C1. The resonant frequency of the first equivalent resonant circuit 21 formed by the first equivalent inductor element L11 and the first equivalent capacitor element C11 connected in series is... For the second frequency band (Wi-Fi 5G band), the resonant frequency f1 of the first equivalent resonant circuit 21 is lower than that of the second frequency band (Wi-Fi 5G band), and the second frequency band (Wi-Fi 5G band) is equivalent to an inductor L2.

[0077] For the first frequency band (MHB band), the resonant frequency f1 of the first equivalent resonant circuit 21 is higher than that of the first frequency band (MHB band), and is equivalent to capacitor C3 for the first frequency band (MHB band).

[0078] In an optional embodiment of the first equivalent resonant circuit 21, please refer to... Figure 9 The first equivalent inductor element L11 is a first inductor, and the first equivalent capacitor element C11 is a first capacitor. One end of the first inductor is electrically connected to connection point H1, and the other end of the first inductor is connected to one end of the first capacitor. The other end of the first capacitor is electrically connected to coupling segment H2. The first inductor is used to form the first equivalent inductor element L11, and the first capacitor is used to form the first equivalent capacitor element C11. One end of the first capacitor and one end of the first inductor are electrically connected to form the aforementioned first equivalent resonant circuit 21.

[0079] The coupling segment H2 can be a point spaced apart from the third opening end E3 to facilitate electrical connection with the first capacitor element.

[0080] In an alternative embodiment of the second type of first equivalent resonant circuit 21, please refer to [link / reference needed]. Figure 8 The first equivalent resonant circuit 21 also includes an auxiliary radiating stub 13. One end of the auxiliary radiating stub 13 is electrically connected to the connection point H1, and the other end of the auxiliary radiating stub 13 is coupled with the coupling segment H2 to form a first equivalent capacitor element C11. The auxiliary radiating stub 13 forms a first equivalent inductor element L11.

[0081] The auxiliary radiating stub 13 is an inductive element. This application does not limit the specific structure of the auxiliary radiating stub 13. Optionally, the auxiliary radiating stub 13 may include at least one of the following: a conductive segment, an FPC conductive element, copper foil, a steel sheet, a conductive connecting wire, and a lumped matching element.

[0082] The auxiliary radiating stub 13 is a conductive structure. Optionally, the auxiliary radiating stub 13 is a conductive segment. The length of the auxiliary radiating stub 13 is much greater than its width. The inductance of the auxiliary radiating stub 13 can be equivalent to the first equivalent inductor element L11.

[0083] Please see Figure 8 The auxiliary radiating branch 13 and the first equivalent capacitor element C11 form the aforementioned first equivalent resonant circuit 21.

[0084] In other words, the first equivalent resonant circuit 21 can be an LC resonant circuit. The first equivalent resonant circuit 21 has different impedance properties in different frequency bands, thereby changing the boundary conditions at the auxiliary radiating stub 13 for different frequency bands, so as to excite resonant modes that support multiple different frequency bands, so as to design more frequency bands on the same antenna radiator.

[0085] The coupling segment H2 can be a stub on the second radiating stub 12 near the third opening end E3. The coupling segment H2 is arranged opposite to the auxiliary radiating stub 13 and has a small coupling gap, the capacitance of which is equivalent to the first equivalent capacitor element C11.

[0086] Optional, please refer to Figure 8 A first coupling gap G1 is formed between the third opening end E3 and the second opening end E2. The third opening end E3 and the second opening end E2 are coupled together to form a second equivalent capacitor element C2 (distributed capacitor structure). One end of the second equivalent capacitor element C2 is electrically connected to one end of the first equivalent resonant circuit 21, and the other end of the second equivalent capacitor element C2 is electrically connected to the other end of the first equivalent resonant circuit 21 to form a second equivalent resonant circuit 22. The resonant frequency of the second equivalent resonant circuit 22 is located within the second frequency band.

[0087] In other words, the first equivalent inductor element L11 and the first equivalent capacitor element C11 are connected in series to form the first equivalent resonant circuit 21, and the second equivalent capacitor element C2 is connected in parallel with the first equivalent resonant circuit 21 to form the second equivalent resonant circuit 22.

[0088] The first equivalent resonant circuit 21 is equivalent to the second inductor L2 for the second frequency band.

[0089] This application designs the second equivalent resonant circuit 22 with a resonant frequency of f2, where, Located within the second frequency band, the second equivalent resonant circuit 22 forms a resonant mode similar to an open resonant ring in the second frequency band, making the current direction between the first radiating stub 11 and the second radiating stub 12 the same, thereby improving the efficiency of the second frequency band.

[0090] Taking the second frequency band as the Wi-Fi 5G frequency band as an example, the resonant frequency f1 of the first equivalent resonant circuit 21 is lower than that of the Wi-Fi 5G frequency band. The first equivalent resonant circuit 21 is equivalent to an inductor L2 for the Wi-Fi 5G frequency band. The resonant frequency f2 of the second equivalent resonant circuit 22 is located within the Wi-Fi 5G frequency band, so as to excite the second equivalent resonant circuit 22 to form a Wi-Fi 5G frequency band similar to an open-loop resonant current distribution.

[0091] Further optional information can be found in [link to relevant documentation]. Figure 8 The connection point H1 is located adjacent to the first open end E1.

[0092] Optionally, the electrical length between the connection point H1 and the first open end E1 is greater than or equal to half the wavelength of the second frequency band, and less than or equal to one wavelength of the second frequency band.

[0093] In this way, the second equivalent resonant circuit 22 is located in the region of the second half wavelength segment of the first radiator 10, thereby suppressing the reverse current generated in the second half wavelength segment of the first radiator 10 when the first equivalent resonant circuit 21 is not set, so that the region of the second half wavelength segment of the first radiator 10 generates a current in the same direction as the first half wavelength segment. The two half wavelength currents in the same direction are superimposed in the far field, thereby increasing the gain of the antenna assembly 100 operating in the second frequency band.

[0094] The following example, with reference to the accompanying drawings, illustrates the situation where the auxiliary radiating branch 13 is an L-shaped branch. Taking the example of the auxiliary radiating branch 13 being an L-shaped thin branch, an L-shaped thin branch (auxiliary radiating branch 13) is loaded at the end of the first radiating branch 11.

[0095] Please see Figure 8 The auxiliary radiating branch 13 includes a first connecting end H3 and a fourth opening end E4.

[0096] The first connecting end H3 connects to the connecting point H1. The fourth open end E4 extends in the direction of the second radial branch 12.

[0097] A portion of the auxiliary radiating branch 13 is opposite to the second radiating branch 12 in a first direction and forms a second coupling gap. The first direction intersects the extension direction of the first radiating branch 11.

[0098] The first direction includes, but is not limited to, the thickness direction of the first radiating branch 11.

[0099] Optionally, the auxiliary radiating branch 13 and the first radiating branch 11 are an integral structure. Specifically, the auxiliary radiating branch 13 and the first radiating branch 11 are formed by cutting from the same plate during fabrication.

[0100] Please see Figure 3 The auxiliary radiating branch 13 is located within the clearance area of ​​the first radiating branch 11. The auxiliary radiating branch 13 extends from the first radiating branch 11 across the second coupling gap to the second radiating branch 12.

[0101] Furthermore, the first part of the auxiliary radiation branch 13 is located in the gap between the first radiation branch 11 and the edge of the reference floor 500, the second part of the auxiliary radiation branch 13 is directly opposite the second coupling gap, and the third part of the auxiliary radiation branch 13 is located in the gap between the second radiation branch 12 and the edge of the reference floor 500.

[0102] Further optional information can be found in [link to relevant documentation]. Figure 10 The auxiliary radiation branch 13 includes a first sub-extension 131, a second sub-extension 132 and a coupling extension 133 arranged intersectingly.

[0103] One end of the first sub-extension segment 131 (the first connection end H3) is connected to the connection point H1. Furthermore, the first sub-extension segment 131 and the first radial branch 11 are interconnected into a single structure.

[0104] The first sub-extension 131 extends in a direction intersecting with the first radial branch 11. Optionally, the first sub-extension 131 extends in a first direction. The second sub-extension 132 extends parallel to the extension direction of the first radial branch 11. The second sub-extension 132 extends from the first sub-extension 131 toward the side where the second radial branch 12 is located, and a portion of the second sub-extension 132 is disposed opposite to the first coupling gap G1. The coupling extension 133 is disposed opposite to the second radial branch 12 in the first direction.

[0105] Further optional information can be found in [link to relevant documentation]. Figure 11The width of the coupling extension 133 is greater than the width of the second sub-extension 132, so that the coupling extension 133 and the second radiating stub 12 are face-to-face. By increasing the facing area between the coupling extension 133 and the second radiating stub 12, the coupling capacitance between the coupling extension 133 and the coupling segment H2 is increased.

[0106] In other words, auxiliary radiating branch 13 is an L-shaped branch, and it is a branch that is thin in the middle and wide at the end of the L-shaped branch.

[0107] The inductance of the first sub-extension 131, the inductance of the second sub-extension 132, and the inductance of the coupling extension 133 are used to form the first equivalent inductor element L11. In other words, the branch of the auxiliary radiating branch 13 itself is equivalent to the first inductor. L 1. The capacitance between the coupling extension 133 and the coupling segment H2 of the second radiating stub 12 is used to form a first equivalent capacitor element C11. That is, the coupling portion between the auxiliary radiating stub 13 and the second radiating stub 12 can be equivalent to the first capacitor. C 1.

[0108] As mentioned above, the auxiliary radiating stub 13 is a conductive segment. The length of the second radiating stub 12 is greater than the length of the auxiliary radiating stub 13. The auxiliary radiating stub 13 extends into the gap between the second radiating stub 12 and the edge of the reference ground 500, so as to facilitate coupling between the auxiliary radiating stub 13 and the second radiating stub 12 and form a distributed coupling capacitance.

[0109] Optionally, the sum of the electrical lengths of the first radiating stub 11 and the auxiliary radiating stub 13 is 0.25 to 0.75 wavelengths of the minimum frequency of the first frequency band.

[0110] Further optionally, the sum of the electrical lengths of the first radiating stub 11 and the auxiliary radiating stub 13 is approximately 0.5 times the wavelength of the minimum frequency of the first frequency band, so that the first feed source 211 can excite a current mode supporting half the wavelength of the first frequency band on the first radiating stub 11 and the auxiliary radiating stub 13.

[0111] For example, taking the first frequency band as the MHB band, the minimum frequency of the first frequency band is 1.7 GHz. The first feed 211 excites the first radiating stub 11 and the auxiliary radiating stub 13 to form a first resonant mode supporting the first frequency band. The current distribution of the first resonant mode is that the current intensity is weak at both ends and strong in the middle.

[0112] Further optionally, the first frequency band includes a first sub-frequency band (e.g., around 1.7 GHz). The first resonant mode includes a first sub-resonant mode.

[0113] The first feed system 20 is used to excite the first open end E1 and the fourth open end E4 to generate a first sub-resonant mode that supports the first sub-frequency band.

[0114] As mentioned above, the first feed 211 provides a first sub-band. The first feed 211 is used to excite a first sub-resonant mode supporting the first sub-band between the first aperture E1 and the fourth aperture E4.

[0115] Please see Figure 12 The current distribution of the first sub-resonant mode is the first sub-current distribution I1.

[0116] In the first sub-current distribution I1, the current weakness point of the first sub-resonant mode is near the first open end E1 and the fourth open end E4. The current strength point of the first sub-resonant mode is near the middle position of the first radiating branch 11. The current direction between the first open end E1 and the middle position of the first radiating branch 11 is the same as the current direction between the fourth open end E4 and the middle position of the first radiating branch 11.

[0117] For example, the center frequency of the first sub-band is 1.7 GHz. The first resonant equivalent circuit exhibits weak capacitance at 1.7 GHz. Furthermore, the first resonant equivalent circuit is practically an open circuit at 1.7 GHz. Thus, the fourth open terminal E4 is an open circuit for the current at 1.7 GHz, meaning the first sub-current distribution I1 is a current weakness at the fourth open terminal E4. The current distribution near the 1.7 GHz frequency is distributed along the entire first radiating stub 11 and its loaded auxiliary radiating stub 13 (L-shaped stub). The entire stub formed by the first radiating stub 11 and the auxiliary radiating stub 13 exhibits a half-wavelength distribution (weak current at both ends, strong current in the middle) and the current direction remains consistent. The region with the strong current is... Figure 12 The area marked with bold lines. The area with the strongest current is... Figure 12 The area where the thin lines are located.

[0118] Understandably, the current distribution characteristics of the 1 / 2 wavelength mode (half-wavelength distribution) in this application are as follows: the current distribution of the 1 / 2 wavelength mode includes one strong current point and two weak current points, wherein both ends of the current distribution of the 1 / 2 wavelength mode are strong current points, and the weak current point is located in the middle position between the two strong current points. The current directions between the two strong current points are the same. Specifically, the current of the first sub-resonant mode flows from the first opening end E1 to the fourth opening end E4 or from the fourth opening end E4 to the first opening end E1, and the current intensity of the first sub-resonant mode first increases and then decreases.

[0119] Furthermore, the antenna assembly 100 provided in this application can also form a wide-bandwidth MHB antenna.

[0120] Optionally, the first frequency band may also include a second sub-band. The center frequency of the second sub-band is higher than that of the first sub-band. Both the first and second sub-bands are sub-bands of the MHB band.

[0121] The first feed system 20 is used to excite the generation of a second sub-resonant mode that supports the second sub-band between the first open end E1 and the fourth open end E4.

[0122] As mentioned above, the first feed 211 provides a first sub-band. The first feed 211 is used to excite a second sub-resonant mode that supports the second sub-band between the first aperture E1 and the fourth aperture E4.

[0123] Please see Figure 13 The current distribution in the second sub-resonant mode is the second sub-current distribution I2.

[0124] In the second sub-current distribution I2, the strong point of the resonant current in the second sub-resonant mode is near the fourth opening terminal E4. The weak point of the current in the second sub-resonant mode is near the first opening terminal E1.

[0125] For example, taking the center frequency of the second sub-band as 2.5GHz, the first resonant equivalent circuit is equivalent to a capacitor at 2.5GHz. In this case, the first radiator 10 is equivalent to an IFA antenna with its left side capacitor grounded. This equivalent IFA antenna is the entirety formed by the first radiating stub 11 and the auxiliary radiating stub 13, and is electrically connected to the grounded second radiating stub 12 through the first coupling gap G1. The current distribution near the 2.5GHz frequency is located on the portion of the first radiating stub 11 biased towards the side containing the second radiating stub 12, the auxiliary radiating stub 13, and the second radiating stub 12. The second sub-current distribution I2 is generally distributed along a quarter wavelength of 2.5GHz (the strong current point appears near the fourth opening end E4, and the weak current point is close to the feed point). The region with the strong current point is... Figure 13 The area marked with bold lines. The area with the strongest current is... Figure 13 The area where the thin lines are located.

[0126] Understandably, the current distribution characteristics of the 1 / 4 wavelength mode in this application are as follows: the current distribution of the 1 / 4 wavelength mode includes a current strong point and a current weak point, wherein the two ends of the current distribution of the 1 / 4 wavelength mode are the current strong point and the current weak point, respectively. In other words, the current distribution of the 1 / 4 wavelength mode includes current flowing from the current strong point to the current weak point with the current intensity gradually decreasing; or current flowing from the current weak point to the current strong point with the current intensity gradually increasing.

[0127] This embodiment designs a first feed 211 to provide a first sub-band and a second sub-band. By designing the resonant frequency of the first resonant equivalent circuit, the first resonant equivalent circuit is effectively close to an open circuit for the first sub-band (e.g., around 1.7 GHz), making the area near the fourth opening end E4 a current weakness point for the first sub-band. This allows the first feed 211 to excite the first radiating stub 11 and the auxiliary radiating stub 13 to form a 1 / 2 wavelength mode supporting the first sub-band. Simultaneously, the first resonant equivalent circuit is equivalent to a capacitor for the second sub-band (e.g., around 2.5 GHz), making the area near the fourth opening end E4 a current strength point for the second sub-band. This excites the first radiating stub 11, the auxiliary radiating stub 13, and the second radiating stub 12 to form a 1 / 4 wavelength mode supporting the second sub-band. Thus, the antenna assembly 100 can simultaneously support both the first and second sub-bands. Furthermore, the first sub-band and the second sub-band form a continuous frequency band, and the antenna assembly 100 can support a wider bandwidth and has higher efficiency within the wider bandwidth.

[0128] Optionally, the first frequency band may also include a third sub-frequency band (e.g., around 2.8 GHz). The first resonant mode may also include a third sub-resonant mode.

[0129] The first feed system 20 is used to excite the generation of a third sub-resonant mode that supports the third sub-band between the first open end E1 and the fourth open end E4.

[0130] As mentioned above, the first feed 211 is also used to provide a third sub-band. The first feed 211 is used to excite a third sub-resonant mode that supports the third sub-band between the first aperture E1 and the fourth aperture E4.

[0131] Please see Figure 14 The current distribution in the third sub-resonant mode is the third sub-current distribution I3.

[0132] In the third sub-current distribution I3, the first strong current point of the third sub-resonant mode is near the fourth open end E4. The second strong current point of the third sub-resonant mode is near the first open end E1. The weak current point of the third sub-resonant mode is near the middle position of the first radiating branch 11. The current direction between the first open end E1 and the middle position of the first radiating branch 11 is opposite to the current direction between the fourth open end E4 and the middle position of the first radiating branch 11. The region of strong current is... Figure 14 The area marked with bold lines. The area with the strongest current is... Figure 14 The area where the thin lines are located.

[0133] For example, taking the center frequency of the third sub-band as 2.8 GHz, the first resonant equivalent circuit is equivalent to a capacitor at 2.8 GHz. In this case, the portion of the first radiator 10 near the auxiliary radiating stub 13 is equivalent to an IFA antenna with its left side capacitor grounded. This equivalent IFA antenna is electrically connected to the grounded second radiating stub 12 through the first coupling gap G1. The current near the 2.8 GHz frequency includes a 1 / 4 wavelength mode distributed in the first radiating stub 11 biased towards the side where the second radiating stub 12 is located, and a 1 / 4 wavelength mode distributed in the first radiating stub 11 biased towards the portion where the first feed point A1 is located, and the current directions of these two 1 / 4 wavelength modes are opposite.

[0134] This embodiment provides a first sub-band, a second sub-band, and a third sub-band by designing a first feed source 211. By designing the resonant frequency of the first resonant equivalent circuit, the first resonant equivalent circuit is effectively close to an open circuit for the first sub-band (e.g., around 1.7 GHz), making the area near the fourth opening end E4 a current weakness point for the first sub-band. This allows the first feed source 211 to excite the first radiating stub 11 and the auxiliary radiating stub 13 to form a 1 / 2 wavelength mode supporting the first sub-band. The first resonant equivalent circuit is equivalent to a capacitor for the second sub-band (e.g., around 2.5 GHz), making the area near the fourth opening end E4 a current strength point for the second sub-band. Furthermore, it also excites the first radiating stub 11, the auxiliary radiating stub 13, and the second radiating stub 12 to form a 1 / 4 wavelength mode supporting the second sub-band. Meanwhile, the first resonant equivalent circuit is equivalent to a capacitor for the third sub-band (e.g., around 2.8 GHz), making the area near the fourth opening end E4 a strong current point for the third sub-band, and the area near the first opening end E1 another strong current point for the third sub-band, so as to excite a portion of the first radiating branch 11 and the auxiliary radiating branch 13 near the second radiating branch 12 to form a 1 / 4 wavelength mode supporting the third sub-band, and a portion of the first radiating branch 11 away from the second radiating branch 12 to form another 1 / 4 wavelength mode supporting the third sub-band.

[0135] Thus, the antenna assembly 100 can simultaneously support the first sub-band, the second sub-band, and the third sub-band. Furthermore, since the first sub-band, the second sub-band, and the third sub-band form a continuous frequency band, the antenna assembly 100 can further support a wider bandwidth and maintain higher efficiency within that wider bandwidth.

[0136] Taking the center frequency of the first sub-band as being around 1.7 GHz, the center frequency of the second sub-band as being around 2.5 GHz, and the center frequency of the third sub-band as being around 2.8 GHz as an example, the continuous frequency band formed by the first, second, and third sub-bands can cover the entire frequency band of cellular MHB (1.71-2.69 GHz). Thus, the antenna assembly 100 can form an MHB antenna that can cover the entire frequency band of cellular MHB (1.71-2.69 GHz).

[0137] Further optional information can be found in [link to relevant documentation]. Figure 15 and Figure 16 The fourth opening end E4 of the auxiliary radiating stub 13 is positioned opposite to the coupling segment H2 in the first direction. The coupling segment H2 to the third opening end E3 of the second radiating stub 12, the auxiliary radiating stub 13, and the second opening end E2 of the first radiating stub 11 to the connection point H1 form a band-stop structure 30 for the second frequency band, so that the current of the second resonant mode is mainly distributed in the band-stop structure 30.

[0138] In other words, the resonant frequency of the resistive structure 30 is close to the parallel resonant frequency formed by the equivalent inductance L2 and the gap capacitance C2 (i.e., the aforementioned second equivalent capacitance element C2). The resonant frequency is located within the second frequency band. Taking the second frequency band as an example, which is within the Wi-Fi 5G band (5.2-5.8GHz), the band-stop structure 30 is equivalent to a band-stop for the Wi-Fi 5G band, thus blocking the current and causing the current of the Wi-Fi 5G band to be mainly distributed in the band-stop structure 30. The current in the band-stop structure 30 is similar to the current in an open-loop resonant ring.

[0139] Specifically, the current characteristics of the resistive structure 30 are as follows: the current flows from the fourth opening end E4 along the auxiliary radiating branch 13 to the connection point H1, and from the connection point H1 to the coupling section H2. Among them, the current intensity in the resistive structure 30 is relatively high and relatively uniform.

[0140] Optionally, the electrical length of the first radiating branch 11 is 0.5 to 1 wavelength of the maximum frequency of the second frequency band.

[0141] Furthermore, the electrical length between the connection point H1 and the first open end E1 is greater than or equal to half the wavelength of the second frequency band, so that when a resonant current of the second frequency band is formed on the first radiating stub 11, at least one half-wavelength current of the second frequency band is distributed between the band-stop structure 30 and the first open end E1. For example, the band-stop structure 30 may be located in the region where the second half-wavelength band of the first radiating stub 11 is located.

[0142] Further optionally, the electrical length of the first radiating branch 11 is about 0.75 times the wavelength of the maximum frequency of the second frequency band, so that there is a first half wavelength current I41 of the second frequency band between the band-stop structure 30 and the first opening end E1, and a second half wavelength current I42 of the second frequency band is formed in the band-stop structure 30.

[0143] For example, taking the maximum frequency of the second band as 5.8 GHz, the first feed 211 excites the first radiating branch 11 to form a second resonant mode that supports the second band.

[0144] Please see Figure 15 The current intensity distribution of the first sub-current I41 is weak-strong-weak. The thickness of the dashed line representing the first sub-current I41 indicates the current intensity. Furthermore, the current mode of the first sub-current I41 is or approximately a 1 / 2 wavelength mode.

[0145] Please see Figure 15 The second sub-current I42 is distributed between the connection point H1 of the first radiating stub 11 and the first grounding point D1, and between the fourth open end E4 of the auxiliary radiating stub 13 and the connection point H1. The current intensity of the second sub-current I42 is relatively strong. The areas with strong current are... Figure 15 The area marked with bold lines. The area with the strongest current is... Figure 15 The area where the thin lines are located.

[0146] Please see Figure 15 The direction of the first sub-current I41 is the same as the direction of the second sub-current I42 on the connection point H1 to the second opening end E2 and the third opening end E3 to the coupling section H2 in the band-stop structure 30. The above design makes the band-stop structure 30 located outside the 1 / 2 wavelength band on the first radiating branch 11 also form a current in the same direction as the first 1 / 2 wavelength band. The reverse current on the second 1 / 2 wavelength band is suppressed by the band-stop structure 30, avoiding the cancellation of far-field energy, reducing beam splitting, increasing the gain of the main lobe, and strengthening the directivity, thereby improving the communication efficiency of the electronic device 1000 in the process of transmitting and receiving signals.

[0147] For example, the first sub-current I41 is to the left, the currents from the connection point H1 of the resistive structure 30 to the second opening end E2 and the third opening end E3 to the coupling section H2 are all to the left, and the currents on the first radiating branch 11 from the first opening end E1 to the coupling section H2 are all to the left.

[0148] In this embodiment, after loading the band-stop structure 30 on the second half wavelength segment of the first radiating branch 11, the original reverse current at that position is suppressed, so that most branches on the first radiating branch 11 exhibit the same current.

[0149] On the one hand, because the first radiating stub 11 has at least two half-wavelength current modes, the reflection effect of the reference ground 500 causes the radiation beam of the antenna assembly 100 operating in the second frequency band to be oriented towards the side of the first radiating stub 11 away from the reference ground 500. On the other hand, the two half-wavelength currents in the same direction have superimposed energy in the far field, which improves the radiation gain. Thirdly, the strong resonant current distribution in the second frequency band on the first radiating stub 11 is more concentrated and the sidelobes are reduced, which reduces the beamwidth, enhances the beam radiation energy, improves the radiation gain, and realizes a high-gain antenna design.

[0150] Please see Figure 15 The second frequency band includes the fourth sub-frequency band (e.g., around 5 GHz). The second resonant mode includes the fourth sub-resonant mode.

[0151] The first feed system 20 is used to excite the first radiators 10 to generate a fourth sub-resonant mode supporting the fourth sub-band. As mentioned above, the second feed 212 provides the fourth sub-band. The second feed 212 is used to excite the first radiating stub 11, the auxiliary radiating stub 13, and the second radiating stub 12 to generate a fourth sub-resonant mode supporting the fourth sub-band.

[0152] The current distribution in the fourth sub-resonant mode is the fourth sub-current distribution I4. The fourth sub-current distribution I4 includes the first sub-current I41 and the second sub-current I42.

[0153] In the fourth sub-current distribution I4, the first strong current point of the fourth sub-resonant mode is distributed between the connection point H1 and the first open end E1. The second strong current point of the fourth sub-resonant mode is distributed in the band-resistive structure 30.

[0154] The first current weakness of the fourth sub-resonant mode is adjacent to the first opening terminal E1. The second current weakness of the fourth sub-resonant mode is distributed between the first current strength point and the connection point H1. The first half-wavelength mode supporting the fourth sub-band is formed between the first opening terminal E1 and the connection point H1. The second half-wavelength mode supporting the fourth sub-band is formed in the band-stop structure 30. The current strength point region is... Figure 15 The area marked with bold lines. The area with the strongest current is... Figure 15 The area where the thin lines are located.

[0155] The direction of the resonant current on the first radiating stub 11 is the same as the direction of the resonant current on the second radiating stub 12. The current distribution near the 5 GHz frequency forms a half-wavelength mode on the right side of the first radiating stub 11.

[0156] Please see Figure 16 The second frequency band includes the fifth sub-band (e.g., around 5.6 GHz). The second resonant mode also includes the fifth sub-resonant mode.

[0157] The first feed system 20 is used to excite the first radiator 10 to generate a fifth sub-resonant mode supporting the fifth sub-band. As mentioned above, the second feed 212 provides the fifth sub-band. The second feed 212 is used to excite the generation of a fifth sub-resonant mode supporting the fifth sub-band among the first radiating stub 11, the auxiliary radiating stub 13, and the second radiating stub 12.

[0158] The current distribution of the fifth sub-resonant mode is the fifth sub-current distribution I5.

[0159] The fifth sub-current distribution I5 shows that the first strong current point of the fifth sub-resonant mode is adjacent to the first feed point A1. The second strong current point of the fifth sub-resonant mode is located between the first feed point A1 and the connection point H1. The third strong resonant current point of the fifth sub-resonant mode is located between the band-resistive structures 30.

[0160] The first current weakness of the fifth sub-resonant mode is located between the first and second current strength points. The second current weakness of the fifth sub-resonant mode is adjacent to the connection point H1. The region of the current strength points is... Figure 16 The area marked with bold lines. The area with the strongest current is... Figure 16 The area where the thin lines are located.

[0161] The direction from the first opening end E1 to the third opening end E3 first forms a 1 / 4 wavelength mode supporting the fifth sub-band, then forms the first 1 / 2 wavelength mode supporting the fifth sub-band, and the second 1 / 2 wavelength mode supporting the fifth sub-band is formed in the band-stop structure 30.

[0162] The direction of the resonant current on the first radiating branch 11 is the same as the direction of the resonant current from the second open end E2 to the first current weak point on the second radiating branch 12.

[0163] The current distribution near the 5.6 GHz frequency forms a three-quarter wavelength mode between the connection point H1 of the first radiating stub 11 and the first open end E1, and a half wavelength mode is formed in the band-stop structure 30 between the connection point H1 and the first ground point D1.

[0164] This embodiment provides a fourth and fifth sub-band by designing a second feed source 212. By designing the resonant frequency of the second resonant equivalent circuit, a strong resonant current is generated in the band-stop structure 30 for both the fourth and fifth sub-bands (e.g., around 5 GHz) and the band-stop structure 30. Thus, the antenna assembly 100 can simultaneously support both the fourth and fifth sub-bands. Furthermore, since the fourth and fifth sub-bands form a continuous frequency band, the antenna assembly 100 can support a wider bandwidth and maintain higher efficiency within that wider bandwidth.

[0165] With the center frequency of the fourth sub-band around 5GHz and the center frequency of the fifth sub-band around 5.6GHz, the continuous frequency band formed by the fourth and fifth sub-bands can cover the entire Wi-Fi 5G frequency band. Thus, the antenna assembly 100 can form a Wi-Fi 5G antenna that can cover the entire Wi-Fi 5G frequency band.

[0166] Furthermore, due to the positional design of the band-stop structure 30, the reverse current on the first radiating stub 11 is suppressed on the one hand, and the first radiating stub 11 and the second radiating stub 12 are in the same direction when they operate in the second frequency band, thus avoiding the cancellation of far-field energy, reducing beam splitting, increasing the gain of the main lobe, strengthening the directivity, and improving the communication efficiency of the second frequency band.

[0167] Optional, please refer to Figure 17 The antenna assembly 100 also includes a first switching tuning circuit 51.

[0168] One end of the first switching tuning circuit 51 is electrically connected to the auxiliary radiation stub 13, and the other end of the first switching tuning circuit 51 is grounded. The impedance of the first switching tuning circuit 51 is adjustable. The first switching tuning circuit 51 is used to tune the frequency of the first frequency band.

[0169] Please see Figure 17 The first switching tuning circuit 51 includes a first switching unit 511 and at least one first tuning element 512. One end of the first switching unit 511 is electrically connected to the auxiliary radiating stub 13, and one end of the first tuning element 512 is electrically connected to the other end of the first switching unit 511. The other end of the first tuning element 512 is grounded. The first tuning element 512 includes a capacitor, an inductor, a short circuit, or a resistor. The number of first tuning elements 512 may be one or more.

[0170] This embodiment adjusts the operating frequency of the lowest frequency antenna by adding capacitors, inductors, and switching matching on the auxiliary radiating branch 13, thereby tuning the operating frequency band of the first sub-band, making the frequency band supported by the antenna assembly 100 adjustable, and thus enabling it to be applied to more antenna frequency bands.

[0171] Optional, please refer to Figure 18 The antenna assembly 100 also includes a second switching tuning circuit 52. One end of the second switching tuning circuit 52 is electrically connected to one end of the auxiliary radiating stub 13, and the other end of the second switching tuning circuit 52 is electrically connected to the second radiating stub 12. The impedance of the second switching tuning circuit 52 is adjustable, and the second switching tuning circuit 52 is used to tune the magnitude of the second frequency band.

[0172] Please see Figure 18The second switching tuning circuit 52 includes a second switching unit 521 and at least one second tuning element 522. One end of the second switching unit 521 is electrically connected to one end of the auxiliary radiating stub 13, and the other end of the second switching unit 521 is electrically connected to one end of the second tuning element 522. The other end of the second tuning element 522 is electrically connected to the second radiating stub 12. The second tuning element 522 includes a capacitor, an inductor, a short circuit, or a resistor. There are multiple second tuning elements 522, each with a different impedance. The second switching tuning circuit 52 is used to switch different second tuning elements 522 between the auxiliary radiating stub 13 and the second radiating stub 12 to tune the second frequency band.

[0173] This embodiment uses series switches and matching devices to change the target bandstop frequency of the bandstop structure 30, so that the antenna assembly 100 can support different second frequency bands.

[0174] Further optional information can be found in [link to relevant documentation]. Figure 19 The antenna assembly 100 also includes a second radiator 60 and a second feeding system 70.

[0175] Please see Figure 19 The second radiator 60 also includes a fifth opening end E5, a second feed point A2, and a second ground point D2. A second coupling gap G2 is formed between the fifth opening end E5 and the first opening end E1. The second ground point D2 is grounded. The second feed system 70 is electrically connected to the second feed point A2. The second feed system 70 is used to excite the second radiator 60 to generate a resonant mode that supports the third frequency band.

[0176] This application does not specify the size of the third frequency band. Optionally, the third frequency band may include, but is not limited to, at least one of the following: LB band (less than 1 GHz), MHB band (1.7-2.7 GHz), Wi-Fi 2.4 GHz band, UHB band (greater than 3 GHz), Wi-Fi 5 GHz band, GPS band, etc.

[0177] Please see Figure 20The antenna assembly 100 includes a main feed stub and a parasitic stub with a loaded thin branch. The main feed stub is the aforementioned first radiating stub 11, the thin branch is the aforementioned auxiliary radiating stub 13, and the parasitic stub is the aforementioned second radiating stub 12. In this embodiment, the aforementioned first frequency band is the MHB and Wi-Fi 2.4G band, and the aforementioned second frequency band is the Wi-Fi 2.4G band. The first and second frequency bands share the same feed point. The left side of the attached figure shows a grounded parasitic stub (i.e., the aforementioned second radiating stub 12) with its opening facing the feed stub. The right side shows the main feed stub (i.e., the aforementioned second radiating stub 12) with an L-shaped thin stub (i.e., the aforementioned auxiliary radiating stub 13) loaded at its end. The key point is that the L-shaped thin stub bypasses the gap between the feed stub and the parasitic stub and couples with the parasitic stub.

[0178] Please see Figure 21 , Figure 21 This is an equivalent circuit of an L-shaped stub loaded on the first radiating stub 11. This L-shaped stub can be equivalent to a series resonant circuit L1 and C1 composed of a capacitor and an inductor. The principle is that the stub itself can be equivalent to an inductor L1, and the coupling part between the stub and the parasitic stub can be equivalent to a capacitor C1. Furthermore, the gap between the feed stub and the parasitic stub can be equivalent to a capacitor C2. It should be noted that for the Wi-Fi 5G band, the series resonant frequency of L1 and C1 is... The frequency band is lower than that of Wi-Fi 5G and is equivalent to an inductor L2. The parallel resonant frequency formed by this equivalent inductor L2 and the gap capacitor C2 is... Within the Wi-Fi 5G band, its equivalent band stop acts to block current. However, in the MHB band, the series resonant frequency f1 of L1 and C1 is higher than MHB and is equivalent to capacitor C3. This equivalent capacitor C3, in parallel with the gap capacitor C2, forms a larger capacitor C2+C3, strengthening the coupling between the feed stub and the parasitic stub, thus increasing the MHB bandwidth. (The entire antenna can be considered an IFA antenna, generating resonances at 2.5GHz (as mentioned in the second sub-band) and 2.8GHz (as mentioned in the third sub-band), which, together with its own 1.7GHz (as mentioned in the first sub-band) half-resonance point, increase the MHB bandwidth.) Without the capacitance from the L-shaped stub, a resonance point higher than 2.8GHz (e.g., 3.4GHz) would be generated on the first radiating stub 11, thus failing to support the MHB band. If the parasitic stub is too long and C3 is too small, it may pull the frequencies originally supporting 2.5GHz (as mentioned in the second sub-band) and 2.8GHz (as mentioned in the third sub-band) towards lower frequencies, thus failing to achieve full coverage of the MHB band.

[0179] Please see Figure 22The antenna assembly provided in this application includes an antenna ground plane (such as the aforementioned reference ground plane 500), an antenna feed point (first feed point A1), two antenna stubs (such as the aforementioned first radiating stub 11 and second radiating stub 12) and an L-shaped thin metal stub in the middle (such as the aforementioned auxiliary radiating stub 13). The L-shaped stub (such as the aforementioned auxiliary radiating stub 13) is thin in the middle and wide at the end, and is used to realize equivalent inductance (the thinner and longer the stub, the greater the inductance, and vice versa) and capacitance (the wider the stub or the closer it is to the parasitic stub, the greater the capacitance, and vice versa).

[0180] In this embodiment, the total electrical length of the main feed stub and the L-shaped sub-stub is near half the wavelength of the lowest frequency (1.7 GHz in this embodiment) (0.25~0.75 wavelengths); the electrical length of the feed stub excluding the L-shaped sub-stub is near three-quarters of the wavelength of the highest frequency (5.8 GHz in this embodiment) (0.5~1 wavelengths); the length of the parasitic stub only needs to be longer than the coupling portion of the L-shaped sub-stub.

[0181] Please see Figure 23 , Figure 23 for Figure 20 The provided S-parameter curves for antenna assembly 100 are shown. Curve a is the S-parameter curve of the first feed 211 in antenna assembly 100. Curve b is the S-parameter curve of the second feed 212 in antenna assembly 100. Curve c is the isolation curve between the first feed 211 and the second feed 212.

[0182] As can be seen, the first radiator 10, under the excitation of the first feed 211, generates resonant modes supporting the first sub-band F01, the second sub-band F02, and the third sub-band F03. The center frequency of the first sub-band F01 is 1.7 GHz, the center frequency of the second sub-band F02 is 2.5 GHz, and the center frequency of the third sub-band F03 is 2.8 GHz. Figure 23 Curve a is the S11 curve of MHB (first band), which has three resonant points (1.7GHz, 2.5GHz, and 2.8GHz respectively). The continuous band formed by the first sub-band F01, the second sub-band F02, and the third sub-band F03 can cover the entire MHB band.

[0183] As can be seen, the first radiator 10, under the excitation of the second feed 212, generates resonant modes supporting the fourth and fifth sub-bands. The center frequency of the fourth sub-band is 5.0 GHz, and the center frequency of the fifth sub-band is 5.6 GHz. Figure 23 Curve b in the middle is the S11 curve of the Wi-Fi 5G band (second band), which has two resonant points (these two resonant points are 5GHz and 5.6GHz respectively).

[0184] Curve c represents the isolation between the first feed source 211 and the second feed source 212. It can be seen that the isolation between the first feed source 211 and the second feed source 212 is >11dB. This indicates that although the first feed source 211 and the second feed source 212 are set at a common feed point, the first matching circuit M1 includes the first filter element 41, and the second matching circuit M2 includes the second filter element 42, so that the first feed source 211 and the second feed source 212 have a high degree of isolation.

[0185] Please see Figure 24 , Figure 24 for Figure 20 The simulation efficiency of the provided antenna assembly 100 is shown. Curve a is the efficiency curve of the first feed 211 in the antenna assembly 100. Curve b is the efficiency curve of the second feed 212 in the antenna assembly 100.

[0186] As can be seen, the yellow curve (the solid line represents system efficiency) is the efficiency curve of the MHB antenna during operation. The antenna assembly 100 operates with an average efficiency of approximately -4.5 dB in the B3 and B1 bands (1.71-2.17 GHz), and with an average efficiency of approximately -3.5 dB in the B40 and B41 bands (2.3-2.69 GHz). The antenna assembly 100 provided in this application exhibits high efficiency in the MHB band (1.7-2.7 GHz). Furthermore, the antenna assembly 100 has an average efficiency of -3.2 dB when operating in the Wi-Fi 2.4 GHz band.

[0187] As can be seen, the purple curve (the solid line represents system efficiency) is the efficiency curve of the Wi-Fi 5G antenna during operation. The average efficiency of antenna component 100 operating in both the low channel (5.15-5.35GHz) and high channel (5.65-5.85GHz) of the Wi-Fi 5G band is approximately -4.7dB. This indicates that the antenna component 100 provided in this application has high efficiency in the Wi-Fi 5G band.

[0188] Based on the aforementioned reflection coefficient, the current modes of each resonance will be analyzed one by one below.

[0189] Please see Figure 25 , Figure 25 This is a current simulation diagram of the antenna assembly 100 provided in this application in the first sub-band F01 (1.7GHz frequency). Please refer to... Figure 25 The current near the 1.7 GHz frequency is distributed along the entire feed stub and its loaded L-shaped stub, exhibiting a half-wavelength distribution (weak current at both ends and strong current in the middle) and maintaining a consistent current direction. The 1.7 GHz frequency current flows from the first open end E1 to the fourth open end E4, and the current intensity at the 1.7 GHz frequency first increases and then decreases. Figure 25The red arrows indicate stronger current, while the green arrows indicate weaker current.

[0190] Please see Figure 26 , Figure 26 This is a current simulation diagram of the antenna assembly 100 provided in this application in the second sub-band F02 (2.5GHz frequency).

[0191] The current distribution near the 2.5 GHz frequency is located on the left half of the feed stub, its loaded L-shaped stub, and parasitic stubs, exhibiting an overall quarter-wavelength distribution (strong current points appear on the left side, and weak current points are near the feed point). In this configuration, the antenna is equivalent to an IFA antenna with its left-side capacitor grounded. The overall current distribution near the 2.5 GHz frequency exhibits a quarter-wavelength distribution (strong current points appear near the fourth opening end E4, and weak current points are near the feed point). Figure 26 The red arrows indicate stronger current, while the green arrows indicate weaker current.

[0192] Please see Figure 27 , Figure 27 This is a current simulation diagram of the antenna assembly 100 provided in this application in the third sub-band F03 (2.8GHz frequency).

[0193] The current distribution near the 2.8 GHz frequency is based on the 2.5 GHz mode, but with an additional quarter wavelength on the right. Looking left from the feed point, after passing through a quarter wavelength, the current reverses to form another quarter wavelength mode. The current near the 2.8 GHz frequency includes a 1 / 4 wavelength mode distributed on the side of the first radiating stub 11 that is biased towards the side where the second radiating stub 12 is located, and a 1 / 4 wavelength mode distributed on the part of the first radiating stub 11 that is biased towards the first feed point A1, and the current directions of these two 1 / 4 wavelength modes are opposite. Figure 27 The red arrows indicate stronger current, while the green arrows indicate weaker current.

[0194] Please see Figure 28 and Figure 29 , Figure 28 This is a current simulation diagram of the antenna assembly 100 provided in this application in the fourth sub-band F04 (5GHz frequency).

[0195] The current distribution near the 5GHz frequency forms a half-wavelength mode on the right side of the feed stub. Figure 28 The red arrow in the middle indicates a point with a strong current. Figure 28The green arrows indicate current weaknesses. A weak-strong-weak 5GHz frequency half-wavelength current forms initially from the first open end E1 to the first grounding point D1. The left portion of the feed stub, together with the L-shaped stub and the parasitic stub, forms a similar equivalent open resonant loop. A high-intensity loop current forms on the left side of the first radiating stub 11, the auxiliary radiating stub 13, and the second radiating stub 12.

[0196] Please see Figure 30 , Figure 30 This is a current simulation diagram of the antenna assembly 100 provided in this application in the fifth sub-band F05 (5.6GHz frequency).

[0197] The current distribution near the 5.6 GHz frequency forms a three-quarter wavelength mode on the feed stub, while the left side of the feed stub, together with the L-shaped stub and the parasitic stub, forms an open resonant ring structure. The current at the 5.6 GHz frequency, from the first open end E1 to the fourth open end E4, first gradually changes from a strong current to a weak current, then forms a 5.6 GHz half wavelength current facing to the right, and then forms a ring current with higher intensity on the left side of the first radiating stub 11, the auxiliary radiating stub 13, and the second radiating stub 12.

[0198] Please see Figure 31 , Figure 31 This is a schematic diagram of the structure of the first comparative example provided in this application. This application provides a first comparative example, wherein the first comparative example is... Figure 20 The difference in the antenna assembly 100 shown is the absence of the band-stop structure 30. Based on the above analysis, without the band-stop structure 30 consisting of an L-shaped stub, a gap, and parasitic stubs, the radiating stubs are too long. When operating in the Wi-Fi 5G band, reverse current will appear on the radiating stubs, resulting in a 5.2GHz radiation efficiency drop of over 3dB. Furthermore, in the MHB band, this long-stub IFA antenna also does not possess ideal performance, with the first comparison showing a drop of over 5dB at 2.5GHz.

[0199] Please see Figure 32 , Figure 32 It is the first pair of proportions and Figure 20 The efficiency comparison curves of antenna assembly 100 in the MHB band are shown. Curve a is the efficiency curve of the first comparison in the MHB band. Curve b is... Figure 20 The efficiency curve of antenna component 100 in the MHB band.

[0200] According to the efficiency curve comparison, when there is no band-stop structure 30 with L-shaped stubs + gaps + parasitic stubs, it does not have ideal performance as a long stub IFA antenna in the MHB band. The first comparison shows a drop of more than 5dB at 2.5GHz.

[0201] Please see Figure 33 , Figure 33 It is the first pair of proportions and Figure 20 The diagram shows the efficiency comparison curves of the antenna assembly 100 in the Wi-Fi 5G band. Curve a is the efficiency curve of the first comparative example in the Wi-Fi 5G band. Curve b is... Figure 20 Efficiency curve of antenna assembly 100 in Wi-Fi 5G band.

[0202] According to the efficiency curve comparison, when there is no L-shaped stub + fracture + parasitic stub structure 30, due to the long length of the radiating stub, when the radiating stub is working in the Wi-Fi 5G band, a reverse current will appear on the radiating stub, and the 5.2GHz radiation efficiency will drop by more than 3dB.

[0203] Please see Figure 34 , Figure 34 It is the second pair of proportions and Figure 20 The diagram shows the structure of the antenna assembly 100. The second comparative example is... Figure 20 The difference in the antenna assembly 100 shown is that it forms a first radiating stub 11 and a second radiating stub 12, but does not have an auxiliary radiating stub 13. When there is a gap and a parasitic stub, but no L-shaped stub, it also does not have ideal performance. At this time, the 5.2GHz radiation efficiency drops by more than 3dB; while the MB performance drops by 1.5dB due to insufficient feed stub length.

[0204] Please see Figure 35 , Figure 35 It is the second pair of proportions and Figure 20 The efficiency comparison curves of antenna assembly 100 in the MHB band are shown. Curve a is the efficiency curve of the second comparison in the MHB band. Curve b is... Figure 20 The efficiency curve of antenna component 100 in the MHB band.

[0205] According to the comparison of efficiency curves, when there are gaps and parasitic branches, but no L-shaped branches, the MB performance drops by 1.5dB due to insufficient power supply branch length.

[0206] Please see Figure 36 , Figure 36 It is the second pair of proportions and Figure 20 The efficiency comparison curves of the antenna assembly 100 in the Wi-Fi 5G band are shown. Curve a is the efficiency curve of the second comparison in the Wi-Fi 5G band. Curve b is... Figure 20 Efficiency curve of antenna assembly 100 in Wi-Fi 5G band.

[0207] According to the comparison of efficiency curves, when there are gaps and parasitic branches, but no L-shaped branches, the performance is not ideal. At this time, the 5.2GHz radiation efficiency drops by more than 3dB.

[0208] This application provides an antenna assembly 100 that integrates the Wi-Fi 5G band on an MHB+Wi-Fi 2.4G antenna. By loading an L-shaped stub structure and coupling parasitic stubs onto a single-stub antenna, the bandwidth is extended through equivalent capacitive coupling at low frequencies. Without switching, it can cover the entire MHB+Wi-Fi 2.4G band in a single-mode form. At high frequencies, an equivalent band-stop resonant ring is formed to block reverse current and improve efficiency. Without a duplexer, coexistence of the MHB and Wi-Fi 5G bands can be achieved.

[0209] Taking the antenna assembly 100 provided in this application as an example installed on a mobile phone, the antenna assembly 100 can be placed in other locations on the mobile phone as needed, such as the top, bottom, sides, and four corners, as long as there is sufficient space. The antenna assembly 100 provided in this application is not only suitable for the MHB+Wi-Fi 5G band, but also suitable for other high and low frequency combinations, such as LB+MB, GPS L1+n78, and MHB+n79 antenna combinations, as long as the center frequency ratio of the two is about 2 times (1.5 to 3 times is also acceptable), and the operating frequency of the lowest frequency antenna can be adjusted by adding capacitors, inductors, and switches for matching on the L-shaped stub. The shape and implementation of the L-shaped stub structure are not limited, and it can be replaced by FPC, copper foil, steel sheet, or PCB connecting wires + lumped matching components, and the target band-stop frequency can be changed by series switching and matching. The parasitic stub can also be reused as other antennas, and a filter circuit can be added to the matching circuit.

[0210] 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 first radiator includes a first radiating stub, a second radiating stub, and a first equivalent resonant circuit. The first radiating stub includes a first open end, a first feed point, a connection point, and a second open end. The second radiating stub includes a third open end, a coupling section, and a first grounding point. A first coupling gap is formed between the third open end and the second open end. The first grounding point is grounded. One end of the first equivalent resonant circuit is connected to the connection point, and the other end of the first equivalent resonant circuit is electrically coupled to the coupling section. A first feed system is electrically connected to the first feed point. The first feed system is used to excite the first radiator to generate a first resonant mode supporting a first frequency band and a second resonant mode supporting a second frequency band. The resonant frequency of the first equivalent resonant circuit is less than the center frequency of the second frequency band and greater than the center frequency of the first frequency band.

2. The antenna assembly as claimed in claim 1, characterized in that, The first equivalent resonant circuit includes a first equivalent inductor and a first equivalent capacitor. One end of the first equivalent inductor is electrically connected to the connection point, and the other end of the first equivalent inductor is electrically connected to one end of the first equivalent capacitor. The other end of the first equivalent capacitor is electrically connected to the coupling segment.

3. The antenna assembly as described in claim 2, characterized in that, The first equivalent resonant circuit further includes an auxiliary radiating stub, one end of which is electrically connected to the connection point, and the other end of which is coupled to the coupling segment to form a first equivalent capacitor element. The auxiliary radiating stub also forms the first equivalent inductor element.

4. The antenna assembly as claimed in claim 1, characterized in that, The center frequency of the second frequency band is 1.5 to 3 times the center frequency of the first frequency band.

5. The antenna assembly as described in claim 3, characterized in that, The third opening end is coupled with the second opening end to form a second equivalent capacitor element. One end of the second equivalent capacitor element is electrically connected to one end of the first equivalent resonant circuit, and the other end of the second equivalent capacitor element is electrically connected to the other end of the first equivalent resonant circuit to form a second equivalent resonant circuit. The resonant frequency of the second equivalent resonant circuit is located in the second frequency band.

6. The antenna assembly as claimed in claim 3, characterized in that, The auxiliary radiating branch includes at least one of the following: a conductive segment, an FPC conductive component, a copper foil, a steel sheet, a conductive connecting wire, and a lumped matching element.

7. The antenna assembly as claimed in claim 1, characterized in that, The connection point is located adjacent to the first opening end.

8. The antenna assembly as claimed in claim 3, characterized in that, The auxiliary radiating branch includes a first connecting end and a fourth open end, the first connecting end is connected to the connecting point, and the fourth open end extends toward the direction where the second radiating branch is located. A portion of the auxiliary radiating branch is opposite to the second radiating branch in a first direction and forms a second coupling gap, the first direction intersecting the extension direction of the first radiating branch.

9. The antenna assembly as claimed in claim 8, characterized in that, The auxiliary radiating branch is an integral structure with the first radiating branch, and the auxiliary radiating branch is located within the clearance area of ​​the first radiating branch; The auxiliary radiating branch includes a first sub-extension segment, a second sub-extension segment, and a coupling extension segment that intersect each other. One end of the first sub-extension segment is connected to the connection point. The first sub-extension segment extends in a direction intersecting with the first radiating branch. The extension direction of the second sub-extension segment is parallel to the extension direction of the first radiating branch. A portion of the second sub-extension segment is disposed opposite to the first coupling gap. The coupling extension segment is disposed opposite to the second radiating branch in the first direction. The width of the coupling extension segment is greater than the width of the second sub-extension segment.

10. The antenna assembly as claimed in claim 1, characterized in that, The first equivalent resonant circuit includes a first inductor and a first capacitor. One end of the first inductor is electrically connected to the connection point, and the other end of the first inductor is electrically connected to one end of the first capacitor. The other end of the first capacitor is electrically connected to the coupling segment. The first inductor is used to form the first equivalent inductor element, and the first capacitor is used to form the first equivalent capacitor element.

11. The antenna assembly as claimed in claim 3, characterized in that, The sum of the electrical lengths of the first radiating branch and the auxiliary radiating branch is 0.25 to 0.75 wavelengths of the minimum frequency of the first frequency band.

12. The antenna assembly as claimed in claim 1, characterized in that, The electrical length of the first radiating branch is 0.5 to 1 wavelength of the maximum frequency of the second frequency band.

13. The antenna assembly as claimed in claim 3, characterized in that, The auxiliary radiating stub is a conductive segment, and the length of the second radiating stub is greater than the length of the auxiliary radiating stub.

14. The antenna assembly as claimed in claim 1, characterized in that, The first frequency band includes the MHB band, and the second frequency band includes the Wi-Fi 5G band; or, The first frequency band includes the LB band, and the second frequency band includes the MB band; or, The first frequency band includes the GPS L1 band, and the second frequency band includes the N78 band; or, The first frequency band includes the MHB band, and the second frequency band includes the N79 band.

15. The antenna assembly as claimed in claim 1, characterized in that, The power supply system includes a first feed source and a second feed source, wherein the first feed source is used to provide an excitation signal for the first frequency band, and the second feed source is used to provide an excitation signal for the second frequency band; The antenna assembly also includes: A first matching circuit is electrically connected between the first feed point and the first feed source; the first matching circuit includes a first filter element, which is used to allow the first frequency band to pass through and block at least a portion of the second frequency band from passing through. A second matching circuit is electrically connected between the first feed point and the second feed source; the second matching circuit includes a second filtering device for allowing the second frequency band to pass and blocking at least a portion of the first frequency band from passing.

16. The antenna assembly as claimed in claim 8, characterized in that, The first frequency band includes a first sub-frequency band. The first feed system is used to excite a first sub-resonant mode supporting the first sub-frequency band between the first opening end and the fourth opening end. The current weakness of the first sub-resonant mode is adjacent to the first opening end and the fourth opening end, and the current strength of the first sub-resonant mode is adjacent to the middle position of the first radiating stub. The current direction between the first opening end and the middle position of the first radiating stub is the same as the current direction between the fourth opening end and the middle position of the first radiating stub.

17. The antenna assembly as claimed in claim 8, characterized in that, The first frequency band also includes a second sub-frequency band. The first feed system is used to excite a second sub-resonant mode that supports the second sub-frequency band between the first opening end and the fourth opening end. The strong point of the resonant current of the second sub-resonant mode is adjacent to the fourth opening end, and the weak point of the current of the second sub-resonant mode is adjacent to the first opening end.

18. The antenna assembly as claimed in claim 8, characterized in that, The first frequency band further includes a third sub-frequency band. The first feed system is used to excite a third sub-resonant mode supporting the third sub-frequency band between the first opening end and the fourth opening end. The first strong current point of the third sub-resonant mode is adjacent to the fourth opening end, the second strong current point of the third sub-resonant mode is adjacent to the first opening end, and the weak current point of the third sub-resonant mode is adjacent to the middle position of the first radiating stub. The current direction between the first opening end and the middle position of the first radiating stub is opposite to the current direction between the fourth opening end and the middle position of the first radiating stub.

19. The antenna assembly as claimed in claim 8, characterized in that, The fourth opening end of the auxiliary radiating stub is disposed opposite to the coupling segment in the first direction. The coupling segment of the second radiating stub to the third opening end, the auxiliary radiating stub, and the second opening end of the first radiating stub to the connection point form a band-stop structure for the second frequency band. The current of the second resonant mode is mainly distributed in the band-stop structure.

20. The antenna assembly as claimed in claim 19, characterized in that, The second frequency band includes a fourth sub-frequency band. The first feed system is used to excite the first radiator to generate a fourth sub-resonant mode that supports the fourth sub-frequency band. The first current strong point of the fourth sub-resonant mode is distributed between the connection point and the first opening end, and the second current strong point of the fourth sub-resonant mode is distributed in the band-stop structure. The first current weakness of the fourth sub-resonant mode is adjacent to the first opening end, and the second current weakness of the fourth sub-resonant mode is distributed between the first current strength point and the connection point; the direction of the resonant current on the first radiating branch is the same as the direction of the resonant current on the second radiating branch.

21. The antenna assembly as claimed in claim 19, characterized in that, The second frequency band includes a fifth sub-frequency band. The first feed system is used to excite the first radiator to generate a fifth sub-resonant mode that supports the fifth sub-frequency band. The first current strong point of the fifth sub-resonant mode is adjacent to the first feed point. The second current strong point of the fifth sub-resonant mode is located between the first feed point and the connection point. The third resonant current strong point of the fifth sub-resonant mode is located between the band-stop structures. The first current weakness of the fifth sub-resonant mode is located between the first current strength point and the second current strength point, and the second current weakness of the fifth sub-resonant mode is adjacent to the connection point. The direction of the resonant current on the first radiating stub is the same as the direction of the resonant current from the second opening end to the first current weakness point on the second radiating stub.

22. The antenna assembly as claimed in claim 3, characterized in that, The antenna assembly further includes a first switching tuning circuit, one end of which is electrically connected to the auxiliary radiating stub, and the other end of which is grounded. The impedance of the first switching tuning circuit is adjustable, and the first switching tuning circuit is used to tune the magnitude of the first frequency band.

23. The antenna assembly as claimed in claim 3, characterized in that, The antenna assembly further includes a second switching tuning circuit, one end of which is electrically connected to one end of the auxiliary radiating stub, and the other end of which is electrically connected to the second radiating stub. The impedance of the second switching tuning circuit is adjustable, and the second switching tuning circuit is used to tune the magnitude of the second frequency band.

24. The antenna assembly as described in any one of claims 1-23, characterized in that, The antenna assembly further includes a second radiator and a second feeding system. The second radiator further includes a fifth opening, a second first feeding point, and a second grounding point. A second coupling gap is formed between the fifth opening and the first opening. The second grounding point is grounded. The second feeding system is electrically connected to the second first feeding point. The second feeding system is used to excite the second radiator to generate a resonant mode that supports the third frequency band.

25. An electronic device, characterized in that, Includes the antenna assembly as described in any one of claims 1 to 24.

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