Antenna assembly and electronic device

Abstract

This application relates to an antenna assembly and an electronic device. The antenna assembly includes: a first radiator, comprising a first free end, a first feed point, and a first ground point; a second radiator, comprising a second free end, a second feed point, and a second ground point; a parasitic stub, wherein a first gap is formed between a first end and the first free end, a second gap is formed between a second end and the second free end, and a third ground point is provided on the parasitic stub; a first feed source connected to the first feed point; and a second feed source connected to the second feed point. The first feed source is used to excite the first radiator to support a first frequency band and to excite the target stub to support a second frequency band; the second feed source is used to excite the second radiator to support a third frequency band and to excite at least a portion of the parasitic stub to support a fourth frequency band. This greatly simplifies the structure of the antenna assembly while improving its performance.

Description

Technical Field

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

[0002] With technological advancements, electronic devices such as mobile phones and tablets with communication capabilities are becoming increasingly widespread and powerful, requiring coverage across a wider range of frequency bands. However, as electronic devices become increasingly thinner and lighter, improving antenna performance while simultaneously enhancing multi-band coverage has become a critical technical challenge. Summary of the Invention

[0003] This application provides an antenna assembly and electronic device that can achieve multi-band coverage and improve antenna performance.

[0004] This application provides an antenna assembly, including:

[0005] The first radiator includes a first free end, a first feed point, and a first ground point;

[0006] The second radiator includes a second free end, a second feed point, and a second grounding point;

[0007] The parasitic branch has a first gap between its first end and its first free end, a second gap between its second end and its second free end, and a third grounding point on its parasitic branch.

[0008] The first feed source is connected to the first feed point;

[0009] The second feed source is connected to the second feed point; wherein...

[0010] The first feed source is used to excite the first radiator to support the first frequency band and to excite the target stub to support the second frequency band; the target stub includes a portion of the parasitic stub, or the target stub includes a portion of the first radiator and a portion of the parasitic stub;

[0011] The second feed source is used to excite the second radiator to support the third frequency band, and to excite at least a portion of the parasitic stubs to support the fourth frequency band.

[0012] This application provides an electronic device including the aforementioned antenna assembly.

[0013] The aforementioned antenna assembly and electronic device include a first radiator, a second radiator, a parasitic stub, a first feed source, and a second feed source. The parasitic stub is disposed between the first and second radiators and can be capacitively coupled to the first and second radiators respectively through gaps. The first feed source is connected to a first feed point on the first radiator, which can excite the first radiator to support a first frequency band and excite the target stub to support a second frequency band. The second feed source is connected to a second feed point on the second radiator, which can excite the second radiator to support a third frequency band and excite at least part of the parasitic stub to support a fourth frequency band. In this way, coverage of four frequency bands can be achieved, such as supporting full-band coverage of mid-high frequency, ultra-high frequency, and WiFi standards. This greatly simplifies the structure of the antenna assembly, improves the integration of the antenna assembly, reduces the overall volume of the antenna assembly, and facilitates the overall miniaturization design of the electronic device equipped with the antenna assembly.

[0014] Furthermore, the parasitic stub is positioned between the first and second radiators, increasing the distance between them and thus reducing the mutual interference between the first and third frequency bands. This improves the isolation between the two antennas and enhances the communication performance of the antenna assembly. Moreover, the free end of the first radiator is positioned close to the parasitic stub. When the antenna assembly is used in an electronic device, the opening of the antenna supporting the first frequency band faces downwards. This also prevents the user from holding the first free end of the first radiator at its maximum field strength in a horizontal grip posture, thereby improving the efficiency of the antenna assembly. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 This is a schematic diagram of the external structure of an electronic device according to an embodiment;

[0017] Figure 2 This is one of the structural schematic diagrams of an antenna assembly according to an embodiment;

[0018] Figure 3 This is a second schematic diagram of the structure of an antenna assembly according to one embodiment;

[0019] Figure 4 This is the third schematic diagram of the antenna assembly in one embodiment;

[0020] Figure 5 This is a fourth schematic diagram of the structure of an antenna assembly according to one embodiment;

[0021] Figure 6 This is a schematic diagram of the layout structure of an antenna assembly according to one embodiment;

[0022] Figure 7 This is a schematic diagram of the current distribution of the antenna assembly operating in the first resonant mode in one embodiment;

[0023] Figure 8 This is a schematic diagram of the current distribution of the antenna assembly operating in the second resonant mode in one embodiment;

[0024] Figure 9 This is one of the structural schematic diagrams of an antenna assembly applied to an electronic device in one embodiment;

[0025] Figure 10 This is a second schematic diagram of the antenna assembly applied to an electronic device in one embodiment;

[0026] Figure 11 This is a schematic diagram of the structure of an electronic device held horizontally in one embodiment;

[0027] Figure 12 This is a schematic diagram of the current distribution in the second resonant mode of an antenna assembly after it is blocked by a conductor in one embodiment.

[0028] Figure 13 The following is a simulation diagram of the efficiency waveform of the antenna assembly in a free state and a horizontal screen holding state in one embodiment;

[0029] Figure 14 This is a schematic diagram of the current distribution in the resonant mode corresponding to the second frequency band in one embodiment;

[0030] Figure 15 This is the third schematic diagram of an antenna assembly applied to an electronic device in one embodiment;

[0031] Figure 16 This is the fourth schematic diagram of an antenna assembly applied to an electronic device in one embodiment;

[0032] Figure 17 This is a block diagram of the internal structure of an electronic device in one embodiment.

[0033] Explanation of reference numerals in the attached figures:

[0034] 100 - Electronic device; 110 - Display assembly; 120 - Bezel; 121 - Top bezel; 123 - Bottom bezel; 122 - First side bezel; 124 - Second side bezel;

[0035] 11-First radiator; 21-Second radiator; 31-Parasitic branch; 311-First sub-branch; 312-Second sub-branch;

[0036] 41 - Third radiator; 51 - Fourth radiator;

[0037] M1 - First matching circuit; 131 - Matching unit; 132 - Filtering unit;

[0038] 31-Memory; 311-Operating System; 312-Communication Module (or Instruction Set); 313-Global Positioning System (GPS) Module (or Instruction Set);

[0039] 32 - Processing circuitry; 33 - Peripheral device interface; 36 - Input / output (I / O) subsystem; 361 - User-pressed buttons;

[0040] 39 - Communication bus or signal line. Detailed Implementation

[0041] To make the objectives, technical solutions, and advantages of this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this application.

[0042] It is understood that the terms "first," "second," etc., used in this application may be used herein to describe various elements, but these elements are not limited by these terms. These terms are only used to distinguish one element from another and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified. When an element is considered to be "connected" to another element, it may be directly connected to the other element or there may be an intervening element present.

[0043] The electronic devices involved in the embodiments of this application can be handheld devices, in-vehicle devices, smart cars, wearable devices, computing devices or other processing devices connected to a wireless modem, as well as various forms of user equipment (UE) (e.g., mobile phones), mobile stations (MS), etc. For ease of description, the devices mentioned above are collectively referred to as electronic devices.

[0044] refer to Figure 1In one embodiment, a mobile phone is used as an example for description. The electronic device 100 includes a display assembly 110 and a housing (not shown in the figure). The display assembly 110 includes a display screen, which can be an OLED (Organic Light-Emitting Diode) screen or an LCD (Liquid Crystal Display) screen. The display assembly 110 can be used to display information and provide an interactive interface for the user. The shape of the display screen can be rectangular or rounded rectangle. A rounded rectangle is sometimes also called a rounded rectangle, meaning that the four corners of the rectangle are rounded, and the four sides of the rectangle are approximately straight lines.

[0045] The housing includes a bezel 120 and a rear cover. The bezel 120 can be made of a metal material such as aluminum alloy, magnesium alloy, or stainless steel, or it can be made of an insulating material such as plastic. The bezel 120 is located on the outer periphery of the display assembly 110 to support and protect the display assembly 110. The bezel 120 can further extend into the electronic device to form a middle plate; the integrally formed middle plate and bezel 120 are sometimes referred to as a mid-frame. The rear cover is located on the side facing away from the display area and is connected to the bezel 120. Furthermore, the display assembly 110 and the rear cover are located on opposite sides of the middle plate.

[0046] The frame 120 is generally rectangular, comprising a top frame 121 and a bottom frame 123 facing away from each other, and a first side frame 122 and a second side frame 124 connecting the top frame 121 and the bottom frame 123. The first side frame 122 and the second side frame 124 are facing away from each other, and the top frame 121, the first side frame 122, the bottom frame 123, and the second side frame 124 are connected end-to-end and located on the outer periphery of the middle plate. Specifically, the connections between the frames 120 can be right-angle connections or arc transition connections. Furthermore, when the frame 120 is a metal frame, multiple metal frame antennas can be formed within the frame 120. Specifically, these metal frame antennas can be formed through slots provided on the frame 120.

[0047] The back cover connects to the frame 120 to define a receiving cavity, i.e., an installation space, for installing electronic components such as batteries, motherboards, and camera modules of electronic devices. The motherboard can be a PCB (Printed Circuit Board) or an FPC (Flexible Printed Circuit). The motherboard can integrate functional devices such as processors, storage units, power management modules, baseband chips, cameras, sensors, and receivers of electronic devices.

[0048] The electronic device also includes a floor. Optionally, the frame 120 surrounds the floor, and it can be understood that the floor is disposed within the receiving space formed by the frame 120. The floor is generally rectangular in shape. Because various slots, holes, etc. are formed on the reference ground edge of the floor as needed to house devices or avoid other structures in the mobile phone. The floor can form a common ground of the electronic device 100, and the floor can be a plane or structure with zero potential. For example, the floor can be formed by conductors, printed circuits, or metal printed layers in the electronic device; or, the floor can be formed on the motherboard, small board, or other carrier board of the electronic device 100; or, the floor can be part of the middle frame (also called the middle plate) of the electronic device 100. It should be noted that the above are several examples of the floor and should not be construed as limiting the floor provided in the embodiments of this application.

[0049] The following examples, with reference to the accompanying drawings, illustrate the specific structures of the antenna assembly and electronic equipment.

[0050] like Figure 2 and Figure 3 As shown, the antenna assembly includes a first radiator 11, a second radiator 21, a parasitic stub 31, a first feed S1, and a second feed S2. The first radiator 11 includes a first free end A1, a first feed point K1, and a first ground point G1. In this embodiment, the free end of the first radiator 11, the second radiator 21, and the parasitic stub 31 refers to the end that is disconnected from other conductive parts on the frame through an insulating gap and is also disconnected from the common ground. For example, the free end of the first radiator 11 is positioned close to the parasitic stub 31.

[0051] The first feed point K1 is located between the first free end A1 and the first grounding point G1. Optionally, the first feed point K1 may be a protrusion of the first radiator 11 protruding towards the floor.

[0052] The first grounding point G1 can be connected to a common ground terminal. In this embodiment, the common ground terminal can be understood as a reference ground terminal, such as the floor of an electronic device. Each grounding point in this embodiment can be connected to a different location on the floor.

[0053] The first feed point K1 can be electrically connected to the first feed source S1. Exemplarily, the electrical connection includes a direct electrical connection between the two structures, or an indirect electrical connection through other components. In this embodiment, the first feed point K1 can be electrically connected to the first feed source S1 through a feed structure. Optionally, the feed structure includes, but is not limited to, conductive springs, conductive screws, coaxial cables, microstrip lines, etc.

[0054] The first feed source S1 is, but is not limited to, an RF transceiver chip, and its first feed source S1 can be used to provide a first excitation signal (or current signal). Optionally, the first feed source S1 can be set on the motherboard of the electronic device.

[0055] The first feed source S1 is used to excite the first radiator 11 to support the first frequency band. It can be understood that the first feed source is the first excitation signal provided by S1 fed into the first feed point K1, and then transmitted to the first radiator 11, which can excite the first radiator 11 and generate a resonant current, generate a resonant mode, and thus support the frequency band corresponding to the resonant current.

[0056] A parasitic branch 31 is disposed between the first radiator 11 and the second radiator 21, and a third grounding point G3 is provided on the parasitic branch 31. A first gap F1 is formed between the first end of the parasitic branch 31 and the first free end A1 of the first radiator 11. The parasitic branch 31 can be capacitively coupled to the first radiator 11 through the first gap F1. Capacitive coupling means that an electric field is generated between the first radiator 11 and the parasitic branch 31, allowing signals from the first radiator 11 to be transmitted to the parasitic branch 31 through the electric field, and vice versa, so that electrical signals can be conducted between the first radiator 11 and the parasitic branch 31 even when they are disconnected.

[0057] The first feed source, S1, is used to excite the target stub to support the second frequency band. The target stub may include a portion of the first radiator 11 and a portion of the parasitic stub 31. The first feed source, S1, can also be used to excite both the first radiator 11 and the parasitic stub 31 to jointly support the second frequency band. It can be understood that the first excitation signal provided by the first feed source, S1, is fed into the first feed point K1 and capacitively coupled to the parasitic stub 31 through the first gap F1. This excites the first radiator 11 and the parasitic stub 31, generating a resonant current and a resonant mode, thereby supporting the second frequency band corresponding to the resonant current.

[0058] Optionally, the target stub includes a portion of the parasitic stub 31. The first feed source S1 can also be used to excite the portion of the parasitic stub 31 to support the second frequency band. It can be understood that the first feed source is the first excitation signal provided by S1 fed into the first feed point K1, which is capacitively coupled to the parasitic stub 31 through the first gap F1, which can excite the parasitic stub 31 and generate a resonant current, generating a resonant mode, and thus supporting the second frequency band corresponding to the resonant current.

[0059] It should be noted that the distribution of resonant current differs across different frequency bands, and their corresponding resonant modes are also different.

[0060] The center frequencies of the first and second frequency bands are different, and the center frequency of the second frequency band is higher than that of the first frequency band. In other words, the minimum frequency of the frequency range corresponding to the second frequency band is greater than the maximum frequency of the frequency range corresponding to the first frequency band. Both the first and second frequency bands are cellular standard frequency bands, for example, they can be 4G LTE signal bands or 5G NR signal bands. For example, the first frequency band can be a mid-to-high frequency band (MHB, 1000MHz-3000MHz), such as the 4G LTE mid-to-high frequency bands such as B1, B3, B40, and B41, or the 5G NR mid-to-high frequency bands such as N1, N3, N40, and N41; the second frequency band can be an ultra-high frequency band (UHB, greater than 3000MHz), for example, the N77, N78, or N79 bands.

[0061] The second radiator 21 includes a second free end A2, a second feed point K2, and a second grounding point G2. The second feed point K2 is located between the second grounding point G2 and the second free end A2. A second gap F2 is formed between the second end of the parasitic stub 31 and the second free end A2, allowing the parasitic stub 31 to capacitively couple with the second radiator 21 through the second gap F2. Capacitive coupling means that an electric field is generated between the second radiator 21 and the parasitic stub 31, allowing the signal from the second radiator 21 to be transmitted to the parasitic stub 31 through the electric field, and vice versa, so that electrical signals can be conducted between the second radiator 21 and the parasitic stub 31 even when they are disconnected.

[0062] The second feed source S2 is connected to the second feed point K2. The second feed source S2 includes, but is not limited to, an RF transceiver chip, and its second feed source S2 can be used to provide a second excitation signal (or current signal). Optionally, the second feed source S2 can be set on the motherboard of the electronic device.

[0063] The second feed source S2 is used to excite the second radiator 21 to support the third frequency band and to excite at least a portion of the parasitic stub 31 to support the fourth frequency band. It is understood that the second excitation signal provided by the second feed source S2 is fed to the second feed point K2 and then transmitted to the second radiator 21, which can excite the second radiator 21 and generate a resonant current, producing a resonant mode to support the third frequency band. Furthermore, the second excitation signal is capacitively coupled to the parasitic stub 31 through the second gap F2, which excites the parasitic stub 31 and generates a resonant current, producing a resonant mode to support the fourth frequency band.

[0064] In this embodiment, the first, second, third, and fourth frequency bands are all different. For example, the communication standards of the third and fourth frequency bands may be the same or different. The communication standards of the third and first frequency bands may also be the same or different. For example, the third frequency band may be a WiFi band or a Bluetooth band, and the fourth frequency band may be a WiFi band. For instance, one of the third and fourth frequency bands may be a WiFi 2.4G band, and the other may be a WiFi 5G band. Optionally, the third and fourth frequency bands may also be cellular bands; for example, the third frequency band may be a mid-to-high frequency band, and the fourth frequency band may be an ultra-high frequency band.

[0065] Optionally, the widths of the first slot F1 and the second slot F2 can satisfy the boundary conditions for capacitive coupling of the two radiators. For example, the widths of the first slot F1 and the second slot F2 can be less than or equal to 5 mm. Optionally, the first slot F1 and the second slot F2 can be filled with insulating dielectric materials to improve the structural strength of the frame 120 of the antenna assembly.

[0066] Optionally, the first feed source is S1, and the second feed source is S2, which can be two independent feed sources, each of which can independently provide the corresponding feed source signal.

[0067] Optionally, the first radiator 11, the second radiator 21, and the parasitic branch 31 can be one of the following: a flexible printed circuit (FPC) antenna radiator, a laser direct structural (LDS) antenna radiator, a printed direct structural (PDS) antenna radiator, a metal radiating branch, or a mode decoration antenna (MDA). In this embodiment, the types of the first radiator 11, the second radiator 21, and the parasitic branch 31 are not further limited, and the types of the first radiator 11, the second radiator 21, and the parasitic branch 31 can be the same or different. In this embodiment, the shapes of the first radiator 11, the second radiator 21, and the parasitic branch 31 can be strip-shaped, bent, curved, etc. In this embodiment, the shapes of the first radiator 11, the second radiator 21, and the parasitic branch 31 are not limited.

[0068] The aforementioned antenna assembly includes a first radiator, a second radiator, a parasitic stub, a first feed, and a second feed. The parasitic stub is disposed between the first and second radiators and can be capacitively coupled to the first and second radiators respectively through gaps. The first feed is connected to a first feed point on the first radiator, which can excite the first radiator to support a first frequency band and excite the target stub to support a second frequency band. The second feed is connected to a second feed point on the second radiator, which can excite the second radiator to support a third frequency band and excite at least part of the parasitic stub to support a fourth frequency band. In this way, coverage of four frequency bands can be achieved, such as supporting full-band coverage of mid-high frequency, ultra-high frequency, and WiFi standards. This greatly simplifies the structure of the antenna assembly, improves the integration of the antenna assembly, reduces the overall size of the antenna assembly, and facilitates the overall miniaturization design of electronic devices equipped with this antenna assembly.

[0069] Furthermore, the parasitic stub is positioned between the first and second radiators, increasing the distance between them and thus reducing the mutual interference between the first and third frequency bands. This improves the isolation between the two antennas and enhances the communication performance of the antenna assembly. Moreover, the free end of the first radiator is positioned close to the parasitic stub. When the antenna assembly is used in an electronic device, the opening of the antenna supporting the first frequency band faces downwards. This also prevents the user from holding the first free end of the first radiator at its maximum field strength in a horizontal grip posture, thereby improving the efficiency of the antenna assembly.

[0070] like Figure 4 and Figure 5 As shown, in an exemplary embodiment, the antenna assembly further includes a first matching circuit M1, wherein a first terminal of the first matching circuit M1 is connected to a first feed source S1, and a second terminal of the first matching circuit M1 is connected to a first feed point K1. The first feed source is a first excitation signal provided by S1. After impedance matching by the first matching circuit M1, it can excite the first radiator 11 to generate multiple resonant modes to support the first frequency band. In this embodiment, for ease of explanation, the first frequency band is described as including a mid-frequency band and a high-frequency band.

[0071] The first feed source S1 is connected to the first feed point K1 via the first matching circuit M1 to excite the first radiator 11 to generate a first resonant mode to support the intermediate frequency band, generate a second resonant mode to support the high frequency band, and excite the target stub to generate a third resonant mode to support the second frequency band.

[0072] like Figure 6As shown, the first matching circuit M1 includes at least a matching unit 131, wherein the first end of the matching unit 131 is connected to the first feed source S1, and the second end of the matching unit 131 is connected to the first feed point K1. Exemplarily, the matching unit 131 may include at least a first capacitor (not shown in the figure), the first end of which is the first end of the matching unit 131, and the second end of which is the second end of the matching unit 131. Optionally, the matching unit 131 may also include a first inductor, wherein the first end of the first inductor is connected to the second end of the first feed point K1 and the first capacitor respectively, and the second end of the first inductor is connected to a common ground terminal. In this embodiment, the matching unit 131 may include multiple lumped elements (e.g., capacitors, inductors), and these lumped elements may be connected in series, parallel, or series-parallel configurations. It should be noted that the specific form of the matching unit 131 is not limited to the examples described above in this embodiment.

[0073] The first radiator 11 supports a resonant mode in the intermediate frequency band, which is the first resonant mode. The main current distribution in the first resonant mode is between the first feed point K1 and the first ground point G1, such as... Figure 7 As shown. Optionally, the current flows from the first feed point K1 to the first ground point G1. Due to the periodicity of the current, at other times, the current can also flow from the first ground point G1 to the first feed point K1. The first resonant mode includes a quarter-wavelength mode corresponding to the path from the first feed point K1 to the first ground point G1.

[0074] The first radiator 11 supports a second resonant mode in the high-frequency band. The main current distribution in the second resonant mode is between the first free end A1 and the first grounding point G1, such as... Figure 8 As shown. Optionally, the current flows from the first free end A1 to the first ground point G1, and from the first free end A1 to the first feed point K1. Due to the periodicity of the current, at other times, the current flow can also be from the first ground point G1 to the first free end A1, and from the first free end A1 to the first free end. The second resonant mode includes a mixed mode from the first free end A1 to the first feed point K1 and from the first free end A1 to the ground point. In the second resonant mode, the excitation current at the first free end A1 is the weakest, and the electric field strength is the strongest.

[0075] In this embodiment, the first free end A1 of the first radiator 11 is located close to the parasitic stub 31, and the first radiator 11 is provided with a first feed point K1 and a first ground point G1. After the first excitation signal provided by the first feed source S1 is fed into the first radiator 11 through the first matching circuit M1, the first radiator 11 can support mid-to-high frequency signals. In addition, by using the parasitic stub 31, full coverage of mid-to-high frequency and ultra-high frequency bands can be achieved without adding a switch, thereby reducing the cost of the antenna assembly.

[0076] In one exemplary embodiment, please continue to refer to Figure 6 The first matching circuit M1 further includes a filtering unit 132. The first terminal of the filtering unit 132 is connected to the matching unit 131, and the second terminal of the filtering unit 132 is connected to a common ground terminal, used to suppress the passage of radio frequency signals in the fourth frequency band. In other words, the filtering unit 132 is used to suppress the passage of radio frequency signals in the fourth frequency band, while allowing radio frequency signals in the first and second frequency bands to pass. For example, the filtering unit 132 may include multiple lumped elements, which can be connected in parallel, series, or series-parallel configurations. The lumped elements may include capacitors or inductors. For example, the filtering unit 132 includes, but is not limited to, resonant filters, m-type filters, and second-order fixed-K type filters.

[0077] In this embodiment, the second frequency band is the N78 band, and the fourth frequency band is the WiFi 5G band, as an example. By setting the filtering unit 132, the signal corresponding to the WiFi 5G band can be prevented from transmitting on the first radiator 11, thereby avoiding interference between the radio frequency signal of the WiFi 5G band and the radio frequency signal of the N78 band, and improving the communication performance of the antenna assembly supporting the WiFi 5G band and the N78 band.

[0078] In the embodiments of this application, for ease of explanation, as follows: Figure 9 and Figure 10 As shown, taking the first radiator 11, the second radiator 21, and the parasitic branch 31 as examples of metallic radiating branches (such as the conductive frame of an electronic device), the specific structure of the antenna assembly is explained. The first radiator 11, the second radiator 21, and the parasitic branch 31 are all located on the same side frame of the electronic device, and the extending directions of the first radiator 11, the second radiator 21, and the parasitic branch 31 are the same as the extending direction of the side frame. The distance between the first free end A1 of the first radiator 11 and the top frame 121 is greater than a preset value. The preset value can be set according to actual needs to avoid obstructing the first free end A1 when holding the device horizontally. For example, the preset value can be any value greater than or equal to 1.5 cm. The preset value is not limited to this example.

[0079] Please continue to refer to this. Figure 9In an exemplary embodiment, the parasitic stub 31 includes a first end and a second end disposed opposite to each other, wherein a third grounding point G3 is disposed between the first end and the second end. In other words, the third grounding point G3 divides the parasitic stub 31 into a first sub-stub 311 disposed near the first radiator 11 and a second sub-stub 312 disposed near the second radiator 21. The first end of the parasitic stub 31 can be understood as a free end, and the second end of the parasitic stub 31 can also be understood as a free end. The first sub-stub 311 is capacitively coupled to the first radiator 11 through a first gap F1, and the second sub-stub 312 is capacitively coupled to the second radiator 21 through a second gap F2. In this embodiment, the first feed source is a first excitation signal provided by S1 fed into the first feed point K1, capacitively coupled to the parasitic stub 31 through the first gap F1, which can generate a resonant current in the first sub-stub 311, generating a resonant mode, and thus supporting the second frequency band corresponding to the resonant current. Exemplarily, the second frequency band includes the N78 frequency band.

[0080] The first sub-stub 311 supports a third resonant mode in the ultra-high frequency band. The main current distribution of the third resonant mode is between the third grounding point G3 and the first end of the parasitic stub 31. The third resonant mode includes the quarter-wavelength mode of the first sub-stub 311, or, the third resonant mode includes the corresponding quarter-wavelength mode radiated from the third node to the first end of the parasitic stub 31.

[0081] Furthermore, the second excitation signal provided by the second feed source S2 is fed into the second feed point K2 and then transmitted to the second radiator 21, which can excite the second radiator 21 and generate a resonant current, generating a fourth resonant mode to support the third frequency band. In addition, the second excitation signal is capacitively coupled to the second sub-stub 312 through the second gap F2, which excites the second sub-stub 312 and generates a resonant current, generating a fifth resonant mode to support the fourth frequency band.

[0082] The fourth resonant mode includes the quarter-wavelength mode of the radiator corresponding to the second feed point K2 to the second ground point G2.

[0083] The fifth resonant mode includes the quarter-wavelength mode of the second sub-branch 312.

[0084] For example, the third frequency band includes the WiFi 2.4G frequency band, and the fourth frequency band includes the WiFi 5G frequency band.

[0085] Optional, please continue to refer to Figure 4 and Figure 5 The antenna assembly may also include a second matching circuit M2, which may be connected to the second feed source S2 and the second feed point K2 respectively.

[0086] In this embodiment, the antenna assembly includes a first radiator 11, a parasitic stub 31, and a second radiator 21. By setting corresponding feed points and ground points on each radiator, an IFA antenna design is achieved, enabling full coverage of the MHB+N78 band, as well as full coverage of the WiFi 2.4G and WiFi 5G bands, when a switch is added. Furthermore, by placing the parasitic stub 31 between the first radiator 11 and the second radiator 21, the first radiator 11 and the second radiator 21 can be physically isolated, thereby reducing the mutual interference between the WiFi 2.4G band and the MHB band (e.g., B40 / B41), improving the isolation between the two antennas, and thus enhancing the communication performance of the antenna assembly.

[0087] Furthermore, the free end of the first radiator 11 is positioned close to the parasitic branch 31. When the antenna assembly is applied to an electronic device, the opening of the IFA antenna used to support the first frequency band faces downwards. This can also prevent the user from holding the first free end A1 of the first radiator 11 at the point of maximum field strength in a horizontal holding posture, thereby improving the efficiency of the antenna assembly.

[0088] Optional, such as Figure 11 As shown, when a conductive obstruction (e.g., a user's hand) partially blocks the first radiator 11, the obstruction alters the second resonant mode. When the first radiator 11 is unobstructed, its second resonant mode includes a mixed mode from the first free end A1 to the first feed point K1 and from the first free end A1 to the first ground point G1, as shown... Figure 8 As shown. When the first radiator 11 is blocked, its second resonant mode changes to a hybrid mode of loop mode from the third grounding point G3 of the parasitic stub 31 to the first feed point K1, and a 1 / 4 wavelength mode from the first feed point K1 to the first grounding point G1, as shown. Figure 12 As shown. Thus, the second resonant mode changes, which improves antenna impedance matching and increases antenna efficiency.

[0089] Figure 13 This figure shows the efficiency simulation of the antenna assembly in a free state and when the electronic device is held horizontally with both hands. In the figure, curve ① is the S1,1 curve when the electronic device is held horizontally with both hands; curve ② is the S1,1 curve when the electronic device is in a free state; curve ③ is the overall efficiency curve when the electronic device is held horizontally with both hands; and curve ④ is the overall efficiency curve when the electronic device is in a free state. Figure 13 As shown in the simulation data, when a user holds the electronic device horizontally, the antenna impedance matching can be improved by changing the second resonant mode, and both hands can provide an effective loading effect, thereby improving the antenna efficiency.

[0090] Table 1 lists the relevant technologies and this application, as well as... Figure 9The table showing the efficiency comparison of electronic devices supporting B3, B1, B40, and B41 is provided.

[0091]

[0092] It should be noted that in the relevant technical solutions, the opening of the antenna used to support the mid-to-high frequency band faces upward.

[0093] based on Figure 13 As shown in Table 1, cellular network performance can be improved by 0.5~2.6dB in landscape handheld mode, significantly improving network latency and stuttering, and ensuring communication performance.

[0094] Please continue to refer to this. Figure 10 In one exemplary embodiment, unlike the previous embodiments, the third grounding point G3 is located at the end of the parasitic stub 31. The third grounding point G3 is located at the end of the parasitic stub 31 near the first free end A1. That is, the parasitic stub 31 includes a free end, for example, a fourth free end near the second radiator 21. In this embodiment, the first feed source is the first excitation signal provided by S1 fed into the first feed point K1, entering the first radiator 11, and capacitively coupled to the parasitic stub 31 through the first gap F1. This can generate a resonant current between a portion of the first radiator 11 and the third grounding point G3 of the first radiator 11 and the parasitic stub 31, generating a resonant mode, thereby supporting the second frequency band corresponding to the resonant current. Exemplarily, the second frequency band includes the N78 frequency band.

[0095] In this embodiment, the main current distribution of the resonant mode corresponding to the second frequency band is between the third grounding point G3 and the first feed point K1, such as... Figure 14 As shown. This resonant mode includes a LOOP mode that radiates half the wavelength from the first feed point K1 to the third ground point G3.

[0096] In this embodiment, the third grounding point of the parasitic stub is located at the end of the parasitic stub near the first radiator. The length of the first radiator can extend towards the side where the parasitic stub is located. The antenna formed by the first radiator, the first feed, and the parasitic stub can still cover the mid-high frequency and ultra-high frequency bands. The opening of the antenna faces downward. By extending the first radiator, the maximum field strength point at the first free end of the first radiator can be further avoided by holding it by hand. The second resonant mode can also be changed by holding it by hand, thereby improving the antenna efficiency and enhancing the network communication performance of the antenna assembly.

[0097] like Figure 15As shown, in an exemplary embodiment, the antenna assembly further includes a third radiator 41 and a third feed source S3. The third radiator 41 includes a third free end and a fourth free end disposed opposite to each other, and a third feed point K3. The third feed point K3 is disposed between the third free end and the fourth free end, wherein a third gap F3 is formed between the third free end and the end of the first radiator 11.

[0098] The third feed source S3, connected to the third feed point K3, is used to excite the third radiator 41 to support the low-frequency band. It can be understood that the third excitation signal provided by the third feed source S3 is fed into the third feed point K3 and then transmitted to the third radiator 41, which can excite the third radiator 41 and generate a resonant current, producing a resonant mode, thereby supporting the low-frequency band corresponding to the resonant current. For ease of explanation, the third radiator 41 and the third feed source S3 can constitute a monopole low-frequency antenna.

[0099] Low-frequency bands include, but are not limited to, low-frequency bands of cellular standards, GPS L1 bands, GPS L5 bands, etc. In this application embodiment, for ease of explanation, low-frequency bands are used as 4G LTE bands for illustration, which include, but are not limited to, B20 and B28 bands.

[0100] Optionally, when the antenna assembly is applied to an electronic device, a portion of its third radiator 41 is located on the same side frame as the first radiator 11 of the electronic device, and a portion of the third radiator 41 is located on the top frame of the electronic device. In other words, the third radiator 41 can be located at the corner where the side frame and the top frame of the electronic device meet.

[0101] The antenna assembly in this embodiment, by setting three radiators and one parasitic branch 31, along with a corresponding feed, can support low-frequency, mid-high-frequency, and ultra-high-frequency bands, achieving full-band coverage for cellular systems. Furthermore, it can also support full-band coverage for WiFi, expanding the coverage band of the antenna assembly. In addition, it can enable any frequency band under cellular systems (e.g., low-frequency, mid-high-frequency, ultra-high-frequency) to coexist with WiFi systems (WiFi 2.4G / WiFi 5G) for simultaneous communication, improving the throughput and communication performance of the antenna assembly. It also greatly simplifies the structure of the antenna assembly, increases its integration, and reduces its overall size, facilitating the miniaturization of electronic devices equipped with this antenna assembly.

[0102] like Figure 16As shown, in an exemplary embodiment, unlike the previous embodiments, the antenna assembly may further include a WiFi antenna, which can replace the aforementioned monopole low-frequency antenna. The antenna assembly may also include a fourth radiator 51 and a fourth feed source S4. The fourth radiator 51 includes a fifth free end and a sixth free end disposed opposite to each other, as well as a fourth feed point K4 and a fourth ground point G4; the fifth free end has a fourth gap F4 at its end relative to the first radiator 11.

[0103] The fourth feed source S4, connected to the fourth feed point K4, is used to excite the fourth radiator 51 to support the third and fourth frequency bands. It can be understood that the fourth excitation signal provided by the fourth feed source S4 is fed into the fourth feed point K4 and then transmitted to the fourth radiator 51, which can excite the fourth radiator 51 and generate multiple different resonant currents to correspond to multiple resonant modes, thereby supporting the WiFi frequency bands corresponding to these resonant currents (e.g., including the WiFi 2.4G and WiFi 5G bands). For ease of explanation, the fourth radiator 51 and the fourth feed source S4 can constitute an IFA WiFi antenna.

[0104] Optionally, when the antenna assembly is applied to an electronic device, a portion of its fourth radiator 51 is located on the same side frame of the electronic device as the first radiator 11, and a portion of the fourth radiator 51 is located on the top frame of the electronic device. In other words, the fourth radiator 51 can be located at the corner where the side frame and the top frame of the electronic device intersect.

[0105] The antenna assembly in this embodiment, by setting three radiators and one parasitic stub 31, along with a corresponding feed, can support mid-to-high frequency bands and ultra-high frequency bands, as well as full-band coverage and MIMO technology for WiFi bands. Furthermore, it can enable coexistence of any frequency band under cellular standards (e.g., mid-to-high frequency, ultra-high frequency) and WiFi standards (WiFi 2.4G / WiFi 5G) for simultaneous communication, thereby improving the throughput and communication performance of the antenna assembly. It also greatly simplifies the structure of the antenna assembly, increases its integration, and reduces its overall size, facilitating the miniaturization of electronic devices equipped with this antenna assembly.

[0106] like Figure 17 As shown, further explanation will be given using a mobile phone as an example of the aforementioned electronic device. Specifically, as follows... Figure 17 As shown, the mobile phone may include a memory 31 (which optionally includes one or more computer-readable storage media), processing circuitry 32, a peripheral device interface 33, an antenna assembly as described in the above embodiments, and an input / output (I / O) subsystem 36. These components optionally communicate via one or more communication buses or signal lines 39. Those skilled in the art will understand that... Figure 17The mobile phone shown does not constitute a limitation on the mobile phone and may include more or fewer components than shown, or combine certain components, or have different component arrangements. Figure 17 The various components shown are implemented in hardware, software, or a combination of both, including one or more signal processing and / or application-specific integrated circuits.

[0107] Memory 31 optionally includes high-speed random access memory, and also optionally includes non-volatile memory, such as one or more disk storage devices, flash memory devices, or other non-volatile solid-state memory devices. Exemplary examples include software components stored in memory 31 such as an operating system 311, a communication module (or instruction set) 312, a global positioning system (GPS) module (or instruction set) 313, etc.

[0108] The processing circuit 32 and other control circuits can be used to control the operation of the mobile phone. The processing circuit 32 can be based on one or more microprocessors, microcontrollers, digital signal processors, baseband processors, power management units, audio codec chips, application-specific integrated circuits, etc. The processing circuit 32 can be configured to implement control algorithms for controlling the use of electronic devices in the mobile phone. The processing circuit 32 can also issue control commands for controlling various switches in the electronic devices.

[0109] I / O subsystem 36 couples input / output peripherals on the mobile phone, such as the keypad and other input control devices, to peripheral interface 33. I / O subsystem 36 optionally includes a touchscreen, buttons, a tone generator, an accelerometer (motion sensor), an ambient light sensor and other sensors, light-emitting diodes and other status indicators, data ports, etc. For example, a user can control the operation of the mobile phone by supplying commands via I / O subsystem 36, and can use the output resources of I / O subsystem 36 to receive status information and other outputs from the mobile phone. For example, a user can press button 361 to turn the mobile phone on or off.

[0110] The technical features of the above embodiments can be combined arbitrarily. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as the combination of these technical features does not contradict each other, it should be considered within the scope of this specification. The above embodiments only illustrate several implementation methods of this application, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of this patent application. It should be noted that for those skilled in the art, several modifications and improvements can be made without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. An antenna assembly, characterized in that, include: The first radiator includes a first free end, a first feed point, and a first ground point; The second radiator includes a second free end, a second feed point, and a second grounding point; The parasitic branch has a first gap between its first end and its first free end, a second gap between its second end and its second free end, and a third grounding point on its parasitic branch. The first feed source is connected to the first feed point; The second feed source is connected to the second feed point; wherein... The first feed source is used to excite the first radiator to support the first frequency band and to excite the target stub to support the second frequency band; the target stub includes a portion of the parasitic stub, or the target stub includes a portion of the first radiator and a portion of the parasitic stub; The second feed source is used to excite the second radiator to support the third frequency band, and to excite at least a portion of the parasitic stubs to support the fourth frequency band.

2. The antenna assembly according to claim 1, characterized in that, The third grounding point divides the parasitic branch into a first sub-branch located near the first radiator and a second sub-branch located near the second radiator, wherein... The target branch includes the first sub-branch; The second feed source is used to excite the second sub-stub to support the fourth frequency band.

3. The antenna assembly according to claim 2, characterized in that, The resonant modes corresponding to the second frequency band include the quarter-wavelength mode of the first sub-segment.

4. The antenna assembly according to claim 1, characterized in that, The third grounding point is located at the end of the parasitic branch near the first free end; The target branch includes a portion of the first radiator and a portion of the parasitic branch; The second feed source is used to excite all the parasitic stubs to support the fourth frequency band.

5. The antenna assembly according to claim 4, characterized in that, The resonant modes of the second frequency band include the Loop mode, which corresponds to half the wavelength of the radiator between the first feed point and the third ground point.

6. The antenna assembly according to any one of claims 1-5, characterized in that, The first frequency band includes a mid-frequency band and a high-frequency band; wherein, The antenna assembly further includes a first matching circuit, through which the first feed source is connected to the first feed point to excite the first radiator to generate a first resonant mode to support the intermediate frequency band, generate a second resonant mode to support the high frequency band, and excite the target stub to generate a third resonant mode to support the second frequency band.

7. The antenna assembly according to claim 6, characterized in that, The first resonant mode includes a quarter-wavelength mode corresponding to the distance from the first feed point to the first ground point; The second resonant mode includes a mixed mode from the first free end to the first feed point and from the first free end to the first ground point.

8. The antenna assembly according to claim 6, characterized in that, The first matching circuit includes: The matching unit is connected to the first feed source and the first feed point respectively; A filtering unit, wherein the first end of the filtering unit is connected to the matching unit and the second end of the filtering unit is connected to a common ground, is used to suppress the passage of radio frequency signals in the fourth frequency band.

9. The antenna assembly according to claim 1, characterized in that, The antenna assembly also includes: The third radiator includes a third free end and a fourth free end disposed opposite to each other, and a third feed point; the third free end and the end of the first radiator have a third gap; The third feed source, connected to the third feed point, is used to excite the third radiator to support the low-frequency band.

10. The antenna assembly according to claim 1, characterized in that, The antenna assembly also includes: The fourth radiator includes a fifth free end and a sixth free end disposed opposite to each other, as well as a fourth feed point and a fourth ground point; the fifth free end has a fourth gap with the end of the first radiator; The fourth feed source, connected to the fourth feed point, is used to excite the fourth radiator to support the third frequency band and the fourth frequency band.

11. The antenna assembly according to claim 1 or 10, characterized in that, One of the third and fourth frequency bands is a WiFi 2.4G band, and the other of the third and fourth frequency bands is a WiFi 5G band.

12. An electronic device, characterized in that, include: The antenna assembly as described in any one of claims 1-11.

13. The electronic device according to claim 12, characterized in that, The electronic device also includes: The frame includes a top frame, a first side frame, a bottom frame, and a second side frame connected in sequence. The first radiator, the second radiator, and the parasitic branch are all located on the first side frame or the second side frame, and the distance between the first free end of the first radiator and the top frame is greater than a preset value.

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