Antenna assembly and electronic equipment

Abstract

The invention relates to an antenna assembly and electronic equipment, and the antenna assembly comprises a first radiator which comprises a first feeding point and a first grounding point disposed at a second end, and the first grounding point is connected to a reference ground end; the first feed source is used for providing a first excitation signal; the first matching circuit is respectively connected with the first feeding point, the first feed source and the reference ground end; a first excitation signal is fed into the first radiator through the first matching circuit to excite the first radiator to generate a first resonant mode supporting a first frequency band, a second resonant mode supporting a second frequency band and a third resonant mode supporting a third frequency band; wherein the first frequency band and the second frequency band are GPS frequency bands with different frequency ranges, the antenna assembly and the electronic equipment can realize GPS frequency band coverage and the third frequency band except the GPS frequency band based on a single radiator, the structure of the antenna assembly can be greatly simplified, and the overall size of the antenna assembly is reduced.

Description

Technical Field

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

[0002] With the advancement of technology, electronic devices with communication functions, such as mobile phones and tablets, are becoming increasingly popular and powerful, requiring more and more frequency bands to be covered. However, as electronic devices become increasingly lightweight, the challenge of improving GPS frequency band coverage while also reducing the space occupied by antenna components has become a technical challenge. Summary of the Invention

[0003] The embodiments of the present application provide an antenna assembly and an electronic device that can achieve GPS frequency band coverage and a third frequency band other than the GPS frequency band based on a single radiator, and can greatly simplify the structure of the antenna assembly and the electronic device.

[0004] The present application provides an antenna assembly, comprising:

[0005] A first radiator, comprising a first end and a second end opposite to each other, wherein the first radiator further comprises a first feeding point and a first grounding point, the first grounding point being connected to a reference ground, the first feeding point being located between the first grounding point and the first end, and the first end being a first free end;

[0006] A first feed source, configured to provide a first excitation signal;

[0007] a first matching circuit, connected to the first feeding point, the first feed source, and the reference ground terminal respectively;

[0008] The first excitation signal is fed to the first radiator through the first matching circuit, exciting the first radiator to generate a first resonance mode supporting a first frequency band, a second resonance mode supporting a second frequency band, and a third resonance mode supporting a third frequency band; wherein the first frequency band and the second frequency band are GPS frequency bands with different frequency ranges, respectively, and the current distributions of the first resonance mode, the second resonance mode, and the third resonance mode are different.

[0009] The present application provides an electronic device including the aforementioned antenna assembly.

[0010] The above-mentioned antenna assembly includes a first radiator, a first feed source and a first matching circuit, wherein a first feed point and a first grounding point connected to a reference ground terminal are provided on the first radiator. The first excitation signal provided by the first feed source can excite the first radiator to generate three resonant modes after impedance matching by the first matching circuit, so as to respectively support two GPS frequency bands (for example, the GPS L5 band and the GPS L1 band), and a third frequency band that does not overlap with the GPS frequency band, for example, an ultra-high frequency band. In this way, without the need for an additional antenna switch, coverage of three frequency bands can be achieved, including the GPS frequency band to improve GPS positioning accuracy. Multiple carrier aggregation states between the three frequency bands can also be achieved, thereby improving the communication performance of the antenna assembly at a low cost. Since only one radiator is used in conjunction with the first matching circuit to support three frequency bands, the structure of the antenna assembly is greatly simplified, the integration of the antenna assembly is improved, and the overall volume of the antenna assembly is reduced, which is conducive to improving the overall miniaturization design of the electronic device installed with the antenna assembly and the layout flexibility of the electronic device installed with the antenna assembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0012] Figure 1 is a schematic structural diagram of an electronic device according to an embodiment;

[0013] Figure 2 This is a schematic structural diagram of an antenna assembly according to an embodiment;

[0014] Figure 3 This is a second structural diagram of an antenna assembly according to an embodiment;

[0015] Figure 4 1 is a schematic diagram of the circuit structure of a first matching circuit in an antenna assembly according to an embodiment;

[0016] Figure 5a Schematic diagram of an S-parameter curve of an antenna assembly in the related art;

[0017] Figure 5b for Figure 5a Smith chart of the antenna assembly;

[0018] Figure 6 is a current distribution diagram corresponding to the first resonant mode of the antenna assembly in one embodiment;

[0019] Figure 7is a current distribution diagram corresponding to the second resonant mode of the antenna assembly in one embodiment;

[0020] Figure 8a is a schematic diagram of an S-parameter curve of an antenna assembly in one embodiment;

[0021] Figure 8b is a Smith chart of an antenna assembly in one embodiment;

[0022] Figure 8c is an antenna efficiency curve diagram of an antenna assembly in one embodiment;

[0023] Figure 9 This is a third structural diagram of an antenna assembly according to an embodiment;

[0024] Figure 10 This is a fourth structural diagram of an antenna assembly according to an embodiment;

[0025] Figure 11 This is a fifth structural diagram of an antenna assembly according to an embodiment;

[0026] Figure 12 This is a sixth structural diagram of an antenna assembly according to an embodiment;

[0027] Figure 13a is a schematic diagram of an S-parameter curve of a second antenna in an antenna assembly according to an embodiment;

[0028] Figure 13b is a schematic diagram of an antenna efficiency curve of a second antenna in an antenna assembly according to an embodiment;

[0029] Figure 14 This is a seventh structural diagram of an antenna assembly according to an embodiment;

[0030] Figure 15 is a schematic diagram of the circuit structure of a second matching circuit of a second antenna in one embodiment;

[0031] Figure 16 is a schematic diagram of an S-parameter curve for characterizing the isolation between the first antenna and the second antenna in one embodiment;

[0032] Figure 17a is a color diagram of current distribution corresponding to the first resonant mode of the antenna assembly in one embodiment;

[0033] Figure 17b is a color diagram of current intensity distribution corresponding to the first resonant mode of the antenna assembly in one embodiment;

[0034] Figure 17c for Figure 17a Corresponding current distribution grayscale image;

[0035] Figure 17d for Figure 17b Corresponding current distribution grayscale image;

[0036] Figure 18a is a color diagram of current distribution corresponding to the second resonant mode of the antenna assembly in one embodiment;

[0037] Figure 18b is a color diagram of current intensity distribution corresponding to the second resonant mode of the antenna assembly in one embodiment;

[0038] Figure 18c for Figure 18a Corresponding current distribution grayscale image;

[0039] Figure 18d for Figure 18b Corresponding current distribution grayscale image;

[0040] Figure 19a A color diagram showing the structure of an antenna assembly applied to an electronic device in one embodiment;

[0041] Figure 19b for Figure 19a The corresponding structural schematic grayscale image;

[0042] Figure 20 FIG. 4 is a block diagram of the internal structure of an electronic device in one embodiment.

[0043] Description of reference numerals:

[0044] 100 - electronic device; 110 - display assembly; 120 - frame; 121 - top frame; 123 - bottom frame; 122 - first side frame; 124 - second side frame;

[0045] 10 - first antenna; 11 - first radiator; 12 - first feeding structure; 13 - second feeding structure; 14 - third feeding structure; K1 - first feeding point; S1 - first feed source; S11 - first sub-feed source; S12 - second sub-feed source; G1 - first ground point; M1 - first matching circuit; M11 - matching component;

[0046] 20 - second antenna; 21 - first radiator; S2 - second feed source; K2 - second feed point; G2 - second ground point; M2 - second matching circuit; 22 - filtering unit; 23 - matching unit;

[0047] 31-memory; 311-operating system; 312-communication module (or instruction set); 313-global positioning system (GPS) module (or instruction set);

[0048] 32-processing circuit; 33-peripheral device interface; 36-input / output (I / O) subsystem; 361-user pressed button;

[0049] 39- Communication bus or signal line. DETAILED DESCRIPTION

[0050] In order to make the purpose, technical solutions and advantages of this application more clearly understood, the present application is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain this application and are not intended to limit this application.

[0051] It is understood that the terms "first", "second", etc. used in this application can be used to describe various elements in this article, but these elements are not limited by these terms. These terms are only used to distinguish the first element from another element, and cannot be understood as indicating or suggesting relative importance or implicitly indicating the number of technical features indicated. Thus, the features defined as "first" and "second" can explicitly or implicitly include at least one of the features. In the description of this application, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly defined. When an element is considered to be "connected" to another element, it can be directly connected to the other element or there may be an intermediate element at the same time.

[0052] In related technology 1, the GPS antenna is generally set on the top of the electronic device. The GPS antenna only supports dual bands of GPS L1 band and a cellular band, and does not support GPS L5 band, and its positioning performance is poor.

[0053] Based on this, the present application provides an antenna assembly and electronic device that can achieve GPS frequency band coverage and a third frequency band other than the GPS frequency band using a single radiator, greatly simplifying the structure of the antenna assembly and facilitating product miniaturization.

[0054] The electronic devices involved in the embodiments of the present application may 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 above-mentioned devices are collectively referred to as electronic devices.

[0055] refer to Figure 1In one embodiment, the electronic device is a mobile phone. The electronic device 100 includes a display assembly 110 and a housing (not shown). The display assembly 110 includes a display screen. The display screen 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 curved. Curved rectangles are sometimes also called rounded rectangles, meaning that the four corners of the rectangle are rounded, and the four sides of the rectangle are generally straight line segments.

[0056] The housing includes a frame 120 and a back cover. The frame 120 can be made of a metal material such as an aluminum alloy, a magnesium alloy or stainless steel, or can be made of an insulating material such as plastic. The frame 120 is arranged on the periphery of the display screen assembly 110 to support and protect the display screen assembly 110. The frame 120 can further extend into the interior of the electronic device to form a middle plate. The integrally formed middle plate and frame 120 are sometimes also referred to as a middle frame. The back cover is arranged on the side of the display area facing away from the display screen and is connected to the frame 120. Furthermore, the display screen assembly 110 and the back cover are respectively located on opposite sides of the middle plate.

[0057] The frame 120 is roughly in the shape of a rectangular frame, which includes a top frame 121 and a bottom frame 123 arranged back to back, and a first side frame 122 and a second side frame 124 connected between the top frame 121 and the bottom frame 123. The first side frame 122 and the second side frame 124 are arranged back to back, 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 are located on the periphery of the middle plate. The specific connection between each frame 120 can be a right-angle connection or an arc transition connection. Furthermore, when the frame 120 is a metal frame, multiple metal frame antennas can be formed in the frame 120. Specifically, the metal frame antenna can be formed by a slit set on the frame 120.

[0058] The back cover is connected to the frame 120 to define a housing cavity, or installation space, for mounting electronic components such as the electronic device's battery, motherboard, and camera module. The motherboard can be a printed circuit board (PCB) or a flexible printed circuit (FPC). The motherboard can integrate functional components such as the electronic device's processor, storage unit, power management module, baseband chip, camera, sensor, and receiver.

[0059] The electronic device also includes a floor. Optionally, the frame 120 is arranged around the floor. It can be understood that the floor is arranged in the accommodation space formed by the frame 120. The shape of the floor is roughly rectangular. Because devices are set up in the mobile phone as needed or other structures are avoided, various grooves, holes, etc. are opened on the reference ground edge of the floor. The floor can form a common ground for the electronic device 100, and the floor can be a plane or structure with zero electric potential. Exemplarily, 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 main board, small board or other supporting board of the electronic device 100; or, the floor can be part of the middle frame (also called middle plate) of the electronic device 100. It should be noted that the above are several examples of floors and should not be understood as limiting the floor provided in the embodiments of the present application.

[0060] The specific structures of the antenna assembly and the electronic device are described below with reference to the accompanying drawings.

[0061] like Figure 2 As shown, the antenna assembly includes a first radiator 11, a first feed source S1, and a first matching circuit M1. The first radiator 11 includes a first end A and a second end B disposed opposite each other, wherein the first end A is a free end. The first free end can be an end disconnected from other conductive parts on the frame by an insulating gap. The second end B can also be an end disconnected from other conductive parts on the frame by an insulating gap, or the second end B can be an end connected to another radiator.

[0062] The material of the first radiator 11 is a conductive material, including but not limited to metal, alloy, etc. The present application does not impose any specific limitation on the material of the first radiator 11 .

[0063] In an exemplary embodiment, the first radiator 11 can be one of a flexible printed circuit (FPC) antenna radiator, a laser direct structuring (LDS) antenna radiator, a print direct structuring (PDS) antenna radiator, a metal radiating branch, and an in-mold decoration antenna (MDA). In the present embodiment, the type of the first radiator 11 is not further limited.

[0064] In an exemplary embodiment, the shape of the first radiator 11 includes, but is not limited to, a strip, a sheet, a rod, a coating, a film, etc. For example, if the first radiator 11 is strip-shaped, the first radiator 11 may extend along a straight line, a curve, or a bend line. In the embodiment of the present application, for ease of description, the first radiator 11 is described as a strip extending along a straight line. Figure 2 The first radiator 11 shown is merely an example and does not limit the shape of the first radiator 11 provided in this application. In other embodiments, the first radiator 11 may be a line of uniform width along its extended trajectory, or a strip of varying width, such as a strip with a gradually varying width or a widened area. In this embodiment of the present application, the shape of the first radiator 11 is not limited.

[0065] The first radiator 11 further includes a first feeding point K1 and a first grounding point G1. The first feeding point K1 is disposed between the first end A and the first grounding point G1. Optionally, the first feeding point K1 may be a protruding portion of the radiator protruding toward the floor.

[0066] In an exemplary embodiment, the distance between the first feeding point K1 and the second end B is smaller than the distance between the first grounding point G1 and the first end A. For example, the first feeding point K1 is disposed at the second end B, or the first feeding point is disposed adjacent to the second end B.

[0067] The first ground point G1 can be electrically connected to a common ground, such as a reference ground system. In the embodiments of the present application, the common ground can be understood as a reference ground, such as the floor of the electronic device. Electrical connection methods include, but are not limited to, direct or indirect connection. For example, the electrical connection between the first ground point and the reference ground can be achieved through a ground return metal.

[0068] A first feed source S1 is configured to provide a first excitation signal. The first feed source S1 includes, but is not limited to, a radio frequency transceiver chip, which can be configured to provide the first excitation signal (or first current signal). Optionally, the first feed source S1 can be disposed on a motherboard of the electronic device.

[0069] The first matching circuit M1 is connected to the first feed point K1, the first feed source S1, and the reference ground. The first matching circuit M1 adjusts the impedance matching between the first feed source S1 port and the first radiator 11 port, thereby facilitating the first excitation signal to excite multiple resonant modes on the first radiator 11.

[0070] The first feed source S1 can be electrically connected to the first feed point K1 via the first matching circuit M1. Exemplarily, the electrical connection includes a direct electrical connection between the two structures, or an indirect electrical connection through other components. In the embodiment of the present application, the first feed point K1 can be electrically connected to the first feed source S1 via the first matching circuit M1 through the feeding structure. Optionally, the feeding structure includes but is not limited to a feeding spring, a conductive screw, a coaxial line, a microstrip line, and the like. In the embodiment of the present application, for ease of description, the feeding structure is described as a feeding spring.

[0071] Among them, the first excitation signal provided by the first feed source S1 is fed into the first radiator 11 through the first matching circuit M1, and the first radiator 11 is stimulated to generate three resonant currents with different current distributions to generate three resonant modes supporting three frequency bands. For example, the first radiator 11 can be stimulated to generate a first resonant mode supporting the first frequency band, a second resonant mode supporting the second frequency band, and a third resonant mode supporting the third frequency band. Among them, the main current distributions of the first resonant mode, the second resonant mode and the third resonant mode are different. It can be understood that the antenna assembly provided in the embodiment of the present application can generate three resonant frequency points under the action of the first excitation signal provided by the first feed source S1. Among them, the resonant frequency point can be the center frequency of each frequency band.

[0072] The center frequencies of the first, second, and third frequency bands are different. The center frequency of the first frequency band is lower than the center frequency of the second frequency band, and the center frequency of the second frequency band is lower than the center frequency of the third frequency band. In other words, the minimum frequency of the frequency range corresponding to the second frequency band is higher than the maximum frequency of the frequency range corresponding to the first frequency band, and the maximum frequency of the frequency range corresponding to the second frequency band is lower than the minimum frequency of the frequency range corresponding to the third frequency band.

[0073] In an exemplary embodiment, the first frequency band and the second frequency band are GPS frequency bands with different frequency ranges. For example, the first frequency band is the GPS L5 frequency band (whose resonant frequency is around 1.18 GHz), and the second frequency band is the GPS L1 frequency band (whose resonant frequency is around 1.58 GHz).

[0074] The third frequency band has a different communication standard from the first frequency band. The communication standard of the third frequency band includes, but is not limited to, cellular standards and WiFi communication standards. In this embodiment of the present application, for ease of illustration, the third frequency band is described as a cellular standard frequency band. For example, the third frequency band can be a 4G LTE signal band or a 5G NR signal band. For example, the third frequency band can be a mid-frequency band (MHB, 300kHz-3MHz), such as 4G LTE mid-frequency bands including, but not limited to, B1, B3, B2, B4, B9, B34, and B39, or a 5G NR mid-frequency band corresponding to a 4G LTE mid-frequency band. Alternatively, the third frequency band can be a high-frequency band (HB, 3MHz-30MHz), such as 4G LTE high-frequency bands including, but not limited to, B7, B38, B40, and B41, or a 5G NR high-frequency band corresponding to a 4G LTE high-frequency band. Alternatively, the third frequency band may be an ultra-high frequency band (UHB, 300 MHz-30 GHz), such as the N77, N78 or N79 frequency band.

[0075] In the embodiment of the present application, no further limitation is imposed on the specific frequency bands of the first frequency band, the second frequency band, and the third frequency band, and the frequency ranges corresponding to the specific frequency bands.

[0076] The above-mentioned antenna assembly includes a first radiator, a first feed source and a first matching circuit, wherein a first feed point and a first grounding point connected to a reference ground terminal are provided on the first radiator. The first excitation signal provided by the first feed source can excite the first radiator to generate three resonant modes after impedance matching by the first matching circuit, so as to respectively support two GPS frequency bands (for example, the GPS L5 band and the GPS L1 band), and a third frequency band that does not overlap with the GPS frequency band, for example, an ultra-high frequency band. In this way, without the need for an additional antenna switch, coverage of three frequency bands can be achieved, including the GPS frequency band to improve GPS positioning accuracy. Multiple carrier aggregation states between the three frequency bands can also be achieved, thereby improving the communication performance of the antenna assembly at a low cost. Since only one radiator is used in conjunction with the first matching circuit to support three frequency bands, the structure of the antenna assembly is greatly simplified, the integration of the antenna assembly is improved, and the overall volume of the antenna assembly is reduced, which is conducive to improving the overall miniaturization design of the electronic device installed with the antenna assembly and the layout flexibility of the electronic device installed with the antenna assembly.

[0077] like Figure 3 and Figure 4 As shown, in an exemplary embodiment, the first matching circuit M1 includes a capacitive component and a matching component M11 connected to the capacitive component. The capacitive component is positioned near the first radiator 11 and connected in series within the first matching circuit M1. The capacitive component is used to achieve impedance matching, thereby encouraging a portion of the first radiator 11 to generate a first resonant mode.

[0078] The first resonant mode mainly achieves impedance matching by connecting a capacitive component (e.g., the first capacitor C1) in series near the antenna end in the first matching circuit M1. If the first capacitor is not set, the antenna S parameter will become Figure 5a S parameter curve and Figure 5b The Smith Chart shown has only two resonant frequencies. Because the length of the first radiator 11 is designed to resonate at a quarter of the wavelength of GPS L1 (the second resonant frequency is approximately 1.58 GHz), it presents an inductive impedance (equivalent to an inductor) to the GPS L5 frequency band (the first resonant frequency is 1.18 GHz). By placing a capacitive component in the first matching circuit M1, the capacitive reactance of the capacitive component offsets the inductive impedance of the GPS L5 frequency band through the LC resonance principle, achieving impedance matching between the feed source impedance and the antenna input terminal impedance, thereby stimulating the generation of the first resonant mode corresponding to the GPS L5 frequency band.

[0079] In an exemplary embodiment, the capacitive component may include a first capacitor C1. The capacitance value of the first capacitor C1 may be 0.3 pF to 2 pF. For example, the capacitance value may be 0.3 pF, 0.6 pF, 0.9 pF, 1.2 pF, 1.5 pF, 1.8 pF, or 2 pF, or any other value between 0.3 pF and 2 pF. For example, the capacitive component may include a capacitor with a capacitance value of approximately 0.9 pF to achieve matching.

[0080] For example, the capacitive component may include multiple first capacitors, which may be connected in series, in parallel, or in series-parallel. The total capacitance of the capacitive component ranges from 0.3 pF to 2 pF. The total capacitance may be determined based on the connection method of the multiple capacitors and is not specifically limited here.

[0081] In an exemplary embodiment, the matching component M11 in the first matching circuit M1 includes multiple lumped elements, which can be connected in series, in parallel, or in series-parallel configurations. Lumped elements include, but are not limited to, capacitors and inductors. By adjusting the matching parameters of the first matching circuit M1, the resonant frequencies of each resonant mode can be adjusted. These matching parameters include, but are not limited to, the capacitance and inductance values ​​corresponding to the lumped elements.

[0082] Please continue to refer to Figure 4In an exemplary embodiment, the matching component M11 may include a first inductor L1, a second inductor L2, a third inductor L3, a second capacitor C2 and a third capacitor C3. The first inductor L1 and the first capacitor are connected in series on the branch between the first feed source S1 and the first feed point K1, and the first inductor L1 and the first capacitor are arranged close to the first feed point K1. The first end A of the second capacitor C2 is respectively connected to the first end A of the second inductor L2, one end of the first capacitor, and the first end A of the third capacitor C3, the second end B of the second capacitor C2 is connected to the reference ground terminal, the second end B of the second inductor L2 is connected to the reference ground terminal, the second end B of the third capacitor C3 is respectively connected to the first feed source S1 and the first end A of the third inductor L3, and the second end B of the third inductor L3 is connected to the reference ground terminal. The first matching circuit M1 provided in the present application is not limited to the following. Figure 4 The first matching circuit M1 shown, Figure 4 The first matching circuit M1 shown is only for illustrative purposes.

[0083] In this embodiment, the antenna assembly can achieve impedance tuning by setting a first matching circuit M1, and then can excite the first radiator 11 to generate three resonant frequencies to cover the GPS L5 band, GPS L1 band and the third band. In this way, a common radiator antenna design can be realized, more working frequency bands can be achieved in a smaller space, and the antenna efficiency is higher.

[0084] like Figure 6 As shown, under the first excitation signal provided by the first feed source S1, the impedance matching of the first matching circuit can excite the first radiator 11 to generate a first resonant mode to support the first frequency band. In an exemplary embodiment, the first resonant mode is a left-handed mode with current distributed between the first feed point K1 and the first ground point G1. The resonant current corresponding to the first resonant mode is concentrated in the feed spring, the branch between the first feed point K1 and the first ground point G1, and the ground return metal.

[0085] In an embodiment of the present application, by adding a capacitive component near the first feeding point in the matching circuit, the first radiator can be stimulated to generate a left-hand mode in which the current is distributed between the first feeding point K1 and the first grounding point G1. The physical size of the antenna required to achieve a specific resonant mode (such as zero-order resonance) can be much smaller than the traditional quarter wavelength, which can greatly reduce the size of the antenna component.

[0086] like Figure 7As shown, under the first excitation signal provided by the first feed source S1, the first radiator 11 can also be stimulated to generate a second resonant mode to support the second frequency band. The second resonant mode is a quarter-wavelength mode in which the current is distributed between the first grounding point G1 and the first free end. Compared with the first resonant mode, the second resonant mode has less current on the feeding spring, and has a current distribution on the branch between the first feeding point K1 and the first grounding point G1. The resonant current corresponding to the second resonant mode is concentrated on the return metal and the branch corresponding to the first grounding point G1 and the first free end A. Exemplarily, the first grounding point G1 is a current strong point, and the first free end A is a current zero point.

[0087] In an exemplary embodiment, the length of the first radiator is greater than or equal to one-quarter of the wavelength of the center frequency corresponding to the second frequency band. If the first ground point G1 is located at the second end B of the first radiator 11, the length of the first radiator can be set to one-quarter of the wavelength of the center frequency corresponding to the second frequency band. In this way, the length of the first radiator can be reduced to support three resonant modes.

[0088] In an exemplary embodiment, the third resonant mode is a quarter-wavelength mode in which the current is distributed between the first feeding point K1 and the first free end, wherein the distance between the first feeding point K1 and the first free end may be approximately a quarter-wavelength of the third frequency band.

[0089] In the embodiment of the present application, the antenna component can generate a first resonance mode, a second resonance mode and a third resonance mode. The S parameters of the antenna component are as follows: Figure 8a As shown, the Smith Chart of the antenna assembly is as follows Figure 8b As shown, the efficiency of the antenna assembly is Figure 8c As shown. Figure 8a and Figure 8b As shown in Figure 1, it can be clearly seen from the S parameters that the antenna component has three resonance modes, which correspond to the first resonance mode, the second resonance mode, and the third resonance mode from low frequency to high frequency. Figure 8c As shown, the efficiency of the first resonance mode (GPS L5 band) is -7~-8dB, the efficiency of the second resonance mode (GPS L1 band) is -2.9dB, and the efficiency of the third resonance mode (N78) is around -6dB on average.

[0090] The antenna assembly provided in the embodiment of the present application can achieve coverage of three frequency bands, for example, it can cover the GPS L5, GPSL1 bands and the N78 band, and thus can realize multiple carrier aggregation states between the three frequency bands, which can improve the communication performance of the antenna assembly at low cost; it can also improve the antenna impedance matching and enhance the antenna efficiency.

[0091] like Figure 9As shown, in an exemplary embodiment, the antenna assembly includes a first feeding structure 12, and the first feed source S1 includes a first sub-feed source S11 and a second sub-feed source S12. The first sub-feed source S11 is used to provide a first sub-excitation signal, and the second sub-feed source S12 is used to provide a second sub-excitation signal. The first sub-feed source S11 and the second sub-feed source S12 are two independent sub-feed sources that can be installed on the main board of the electronic device.

[0092] The first sub-feed source S11 is connected to the first feeding point K1 via the first matching circuit M1 and the first feeding structure 12 to excite the first radiator 11 to generate the first resonance mode and the second resonance mode to cover the GPS frequency band.

[0093] The second sub-feed source S12 is connected to the first feeding point K1 via the first matching circuit M1 and the first feeding structure 12 to excite a portion of the first radiator 11 to generate a third resonance mode to support a third frequency band.

[0094] In this embodiment, the first feeding structure 12 is taken as an example of a feeding spring. Among them, the first sub-feed source S11 and the second sub-feed source S12 can be connected to the first feeding point K1 through the same feeding spring. In this way, the first sub-excitation signal provided by the first sub-feed source S11 and the second sub-excitation signal provided by the second sub-feed source S12 can be fed into the first radiator 11 through the same feeding spring. In this way, the first sub-excitation signal corresponding to the GPS frequency band and the second sub-excitation signal corresponding to the third frequency band are separated to realize the common spring feeding to the first radiator 11 respectively, that is, the feeding spring can merge the two excitation signals at their connection point and then transmit them to the first radiator, which is equivalent to realizing the combining function of the RF combiner. In this way, there is no need for an additional RF combiner to complete the signal combining operation, thereby saving an RF combiner to reduce the insertion loss caused by the combiner and improve the antenna performance. In addition, the cost of the feeding spring and the space occupied can also be reduced.

[0095] like Figure 10 As shown, in an exemplary embodiment, different from the previous embodiment, the antenna assembly includes a second feeding structure 13 and a third feeding structure 14. The first feed source S1 includes a first sub-feed source S11 and a second sub-feed source S12. The first feeding point K1 includes a first sub-feed point K11 and a second sub-feed point. The distance between the second sub-feed point and the first free end is greater than or equal to a quarter wavelength of the third frequency band.

[0096] The first sub-feed source S11 is connected to the first sub-feed point K11 via the second feeding structure 13 to excite the first radiator 11 to generate a first resonance mode and a second resonance mode to cover the GPS frequency band.

[0097] The second sub-feed source S12 is connected to the second sub-feed point via the third feeding structure 14 to excite a portion of the first radiator 11 to generate a third resonance mode to support a third frequency band.

[0098] In this embodiment, two feeding structures, such as two feeding springs, are provided, respectively connected to the first sub-feed S11 and the second sub-feed S12, so that the first sub-excitation signal provided by the first sub-feed S11 is fed to the first radiator 11 via the first sub-feed point K11 to stimulate the first radiator 11 to generate the first and second resonant modes. The second sub-excitation signal provided by the second sub-feed S12 is also fed to the first radiator 11 via the second sub-feed point to stimulate a portion of the second radiator to generate the third resonant mode. By providing two feeding structures, feeding point decoupling can be achieved. Thus, the position of the second sub-feed point on the first radiator 11 can be flexibly adjusted, that is, the distance between the second sub-feed point and the first free end can be adjusted to optimize the performance of the antenna assembly in supporting the third frequency band. Furthermore, the distance between the second sub-feed point and the first free end is related to the third resonant frequency corresponding to the third resonant mode. For example, the distance between the second sub-feed point and the first free end is one-quarter wavelength of the third frequency band, such as one-quarter wavelength of the third resonant frequency. In this way, by adjusting the position of the second sub-feeding point, the third resonant frequency can be adjusted, and the position of the second sub-feeding point can be flexibly designed based on the communication requirements of the antenna assembly to improve the communication performance of the antenna assembly.

[0099] like Figure 11-12 As shown, in an exemplary embodiment, the antenna assembly includes a first antenna 10 and a second antenna 20. The first antenna 10 may include the first radiator 11, the first feed S1, and the first matching circuit M1 of any of the aforementioned embodiments. The second antenna 20 includes a second radiator 21 and a second feed S2.

[0100] In an exemplary embodiment, the shape of the second radiator 21 includes, but is not limited to, a strip, a sheet, a rod, a coating, a film, etc. For example, if the second radiator 21 is strip-shaped, the second radiator 21 may extend along a straight line, a curve, or a bend line. In the embodiment of the present application, for ease of description, the second radiator 21 extending along a straight line is described as an example. Figure 11 and Figure 12 The second radiator 21 shown is merely an example and does not limit the shape of the second radiator 21 provided in this application. In other embodiments, the second radiator 21 may be a line of uniform width along its extended trajectory, or a strip of varying width, such as a strip with a gradually varying width or a widened area. In this embodiment of the present application, the shape of the second radiator 21 is not limited.

[0101] The second radiator 21 includes a third end C and a fourth end D, which are oppositely disposed. The first radiator 11 and the second radiator 21 each comprise a free end, for example, a first free end and a second free end, electrically disconnected from other structures. The fourth end D is the second free end of the antenna assembly, which is disposed away from the first free end.

[0102] The second radiator 21 is spaced apart from or connected to the first radiator 11. Figure 11 , the third end C is connected to the second end B of the first radiator 11. Alternatively, please continue to refer to Figure 12 The third end C is arranged adjacent to the second end B of the first radiator 11.

[0103] The second radiator 21 includes a second ground point G2 and a second feed point K2, which are arranged in sequence. The second ground point G2 is adjacent to or co-located with the first ground point G1 and is connected to a common ground. The second feed point K2 is located near the second free end C. In the embodiments of the present application, the common ground can be understood as a reference ground, such as the floor of the electronic device. Each ground point in the embodiments of the present application can be connected to different locations on the floor.

[0104] The second feed source S2 is connected to the second feed point K2. The second feed source S2 includes but is not limited to a radio frequency transceiver chip, and the second feed source S2 can be used to provide a second excitation signal (or a second current signal). Optionally, the second feed source S2 can be set on the motherboard of the electronic device. In the embodiment of the present application, the electrical connection method between the second feed source S2 and the second feed point K2 includes but is not limited to direct welding, or indirect connection through a coaxial line, a microstrip line, a feed shrapnel, a conductive adhesive, etc. Exemplarily, the second feed source S2 is electrically connected to the second feed point K2 through a feed shrapnel (feed shrapnel) provided on the mainboard.

[0105] The second excitation signal provided by the second feed source S2 is fed into the second radiator 21 to excite the second radiator 21 to generate a fourth resonance mode in a fourth frequency band. The main current distributions of the first resonance mode, the second resonance mode, the third resonance mode, and the fourth resonance mode are different.

[0106] The minimum frequency of the fourth frequency band is greater than the maximum frequency of the third frequency band. Communication standards of the fourth frequency band include, but are not limited to, cellular standards, WiFi communication standards, etc. In an exemplary embodiment, the fourth frequency band is a WiFi communication standard frequency band, for example, a WiFi 5G frequency band.

[0107] The antenna assembly in the embodiment of the present application may include a first antenna 10 and a second antenna 20. The first antenna 10 can generate three resonant modes to support the GPS L1 band, the GPS L5 band, and ultra-high frequency (e.g., the N77 or N78 bands), while the second antenna 20 can generate one resonant mode to support the WiFi 5G band. In other words, the embodiment of the present application can generate four resonant modes to support four frequency bands. Without adding additional switches, all four frequency bands can be supported simultaneously, enabling CA (Connectivity) in all four bands, thereby improving the communication performance of the electronic device. Furthermore, the first radiator 11 and the second radiator 21 occupy only approximately 25 mm, which is approximately 0.1 wavelength (free-space wavelength) of the first frequency band (GPS L5, 1.18 GHz). This further reduces the space occupied by the antenna assembly, facilitating the overall miniaturization of the electronic device in which the antenna assembly is installed and providing flexibility in the layout of the electronic device in which the antenna assembly is installed.

[0108] In an exemplary embodiment, the fourth resonance mode is a quarter mode in which current is distributed between the second feeding point K2 and the second ground point G2.

[0109] The distance between the second feeding point K2 and the second grounding point G2 is related to the fourth resonant frequency corresponding to the fourth resonant mode. For example, the distance between the second feeding point K2 and the second grounding point G2 is one-quarter wavelength of the fourth frequency band, such as one-quarter wavelength of the fourth resonant frequency.

[0110] In an exemplary embodiment, the second feed point K2 can be positioned at the second end D of the second radiator 21, i.e., the second free end of the entire radiating branch of the antenna assembly. This allows the shortest second radiator 21 to be used to support the fourth frequency band, further reducing the footprint of the antenna assembly. Furthermore, by adjusting the position of the second feed point K2, the fourth resonant frequency can be adjusted. This allows the position of the second feed point K2 to be flexibly designed based on the communication requirements of the antenna assembly, thereby improving the communication performance of the antenna assembly.

[0111] In an exemplary embodiment, see Figure 11 The first radiator 11 is connected to the second radiator 21, and the first grounding point G1 and the second grounding point G2 are the same grounding point. It can be understood that the first grounding point G1 on the first radiator 11 and the second grounding point G2 on the second radiator 21 are located at the same position.

[0112] By locating the first and second grounding points G1 and G2 at the same location, that is, by reusing the grounding points of the first and second radiators 11 and 21, the designs of the first and second antennas 10 and 20 can be made more compact, reducing space. Furthermore, the first and second grounding points G1 and G2 can be connected to a reference ground terminal, respectively, so that the currents flowing through the first and second antennas 10 and 20 are both routed to ground via the intermediate grounding point. This reduces mutual interference between the first and second excitation signals and improves isolation between the first and second antennas 10 and 20.

[0113] In the embodiment of the present application, for the convenience of description, it is taken as an example that the first grounding point G1 and the second grounding point G2 are the same grounding point and the second antenna 20 supports the fourth frequency band. Figure 13a is the S parameter curve of the second antenna 20, Figure 13b is the antenna efficiency diagram of the second antenna 20. Figure 13a and Figure 13b It can be seen that the center frequency of the fourth frequency band is 5.8744 GHz, the corresponding frequency band can be the WiFi 5G frequency band, and the efficiency of the fourth frequency band is about -3dB, which meets the communication needs.

[0114] In an exemplary embodiment, see Figure 12 The first radiator 11 is adjacent to the second radiator 21, and the first grounding point G1 is adjacent to the second grounding point G2. The adjacent first grounding point G1 and the second grounding point G2 are spaced apart. For example, a conductive structure or an insulating structure is provided between the adjacent first grounding point G1 and the second grounding point G2.

[0115] By setting the first grounding point G1 and the second grounding point G2 at intervals, the current on the first antenna 10 can be returned to the ground through the first grounding point G1, and the current on the second antenna 20 can be returned to the ground through the second grounding point G2, thereby reducing the mutual influence of signals between the first antenna 10 and the second antenna 20.

[0116] like Figure 14 As shown, in an exemplary embodiment, the antenna assembly further includes a second matching circuit M2. The second matching circuit M2 is connected to the second feeding point K2, the second feed source S2, and the reference ground, respectively, for impedance matching the second excitation signal and filtering the first excitation signal.

[0117] The second excitation signal provided by the second feed source S2 is fed to the second radiator 21 after impedance matching by the second matching circuit M2, thereby exciting the second radiator 21 to generate a fourth resonant mode in the fourth frequency band. In addition, the second matching circuit M2 can also filter the first excitation signal to prevent the first excitation signal from entering the second feed source S2 and affecting the second antenna 20, thereby improving the isolation between the first antenna 10 and the second antenna 20.

[0118] Figure 15 FIG. 1 is a circuit diagram of the second matching circuit M2 in one embodiment. Figure 15 As shown, in an exemplary embodiment, the second matching circuit M2 includes a filter unit 22 and a matching unit 23. A first end of the filter unit 22 is connected to the second feed point K2, and a second end of the filter unit 22 is connected to the reference ground. The filter unit 22 can filter out the current signal corresponding to the first frequency band on the first antenna 10.

[0119] Exemplarily, the filter unit 22 may be an LC series filter unit. For example, the LC series filter unit may include a fourth capacitor C4 and a fourth inductor L4 connected in series. The first end of the filter unit 22 is connected to the second feed point K2, and the first end of the filter unit 22 is connected to the reference ground. In some exemplary embodiments, the filter unit 22 may also be formed as a filter unit in other forms, such as a filter unit composed of capacitors, inductors, etc.

[0120] For the convenience of explanation, the filter unit is taken as an example of an LC series filter unit.

[0121] In an exemplary embodiment, the capacitance value of the fourth capacitor C4 may be in the range of 2.5-6 pF, and the inductance value of the fourth inductor L4 may be in the range of 2.3-5.8 nH. For example, the capacitance value of the fourth capacitor C4 may be in the range of 4.9 pF, and the inductance value of the fourth inductor L4 may be in the range of 4.7 nH. In the embodiment of the present application, the capacitance value of the fourth capacitor C4 and the inductance value of the fourth inductor L4 in the LC series filter unit are not limited to the above examples and can be set based on actual communication requirements, for example, the signal corresponding to the target frequency band to be filtered.

[0122] The first end of the matching unit 23 is connected to the first end of the filtering unit 22, and the second end of the matching unit 23 is connected to the second feed point K2. Exemplarily, the matching unit 23 may include a fifth capacitor C5 and a fifth inductor L5, wherein the fifth capacitor is connected to the first end A of the fifth inductor L5 and the first end of the filtering unit 22, respectively, and the second end of the fifth capacitor C5 is connected to the second end of the fifth inductor L5 and the second feed source S2, respectively.

[0123] In an exemplary embodiment, in addition to the examples described above, matching unit 23 may also include multiple lumped elements, which may be connected in series, in parallel, or in series-parallel configurations. Lumped elements include, but are not limited to, capacitors and inductors. The impedance matching of WiFi 5G can be adjusted by adjusting the matching parameters of matching unit 23. These matching parameters include, but are not limited to, the capacitance and inductance values ​​corresponding to the lumped elements.

[0124] Based on Figure 15 The second matching circuit M2 shown in FIG. 1 has an isolation between the first antenna 10 and the second antenna 20 as shown in FIG. Figure 16 As shown. Figure 16 It can be seen that the isolation between the first antenna 10 and the second antenna 20 is greater than 16 dB in the entire frequency band. Therefore, based on the setting of the second matching circuit M2, the isolation between the first antenna 10 and the second antenna 20 can be greatly improved.

[0125] In the embodiments of this application, for ease of illustration, the specific structure and resonant modes of the antenna assembly are described using an example comprising a first antenna 10 and a second antenna 20, wherein the first radiator 11 of the first antenna 10 and the second radiator 21 of the second antenna 20 are metal radiating branches (e.g., the conductive frame of an electronic device). The antenna assembly includes the first radiator 11, the second radiator 21, a first feed S1, a second feed S2, a first matching circuit M1, and a second matching circuit M2. The first radiator 11 and the second radiator 12 are arranged in contact with each other and share a common ground point.

[0126] The first antenna 10 can achieve impedance matching through the first matching circuit M1 to excite the first radiator 11 to generate the first resonance mode, the second resonance mode and the third resonance mode.

[0127] Figure 17a and Figure 17b They are the current distribution color maps corresponding to the first resonance mode, Figure 17c and Figure 17d They are the grayscale images of the current distribution corresponding to the first resonance mode. Figure 17a and Figure 17c As shown, the first resonant mode is a left-hand mode in which the current is distributed between the first feeding point K1 and the first grounding point G1. Figure 17b and Figure 17d As shown, the resonant current corresponding to the first resonant mode is concentrated in the feeding spring, the branch between the first feeding point K1 and the first grounding point G1, and the ground return metal.

[0128] Figure 17a and Figure 17b They are the current distribution color maps corresponding to the second resonance mode, Figure 18c and Figure 18d They are the grayscale images of the current distribution corresponding to the first resonance mode. Figure 18a and Figure 18c As shown, the second resonance mode is a quarter-wavelength mode in which the current is distributed between the first ground point G1 and the first free end. Figure 18b and Figure 18d As shown, compared with the first resonance mode, the second resonance mode has less current on the feeding spring, but has a current distribution on the branch between the first feeding point K1 and the first grounding point G1. The resonant current corresponding to the second resonance mode is concentrated on the return metal and the branch corresponding to the first grounding point G1 and the first free end A. Exemplarily, the first grounding point G1 is the current strong point, and the first free end A is the current zero point.

[0129] Apparently, the antenna assembly provided in the embodiment of the present application includes a first antenna 10 and a second antenna 20. The first antenna 10 can generate three resonant modes to support the GPS L1 band, the GPS L5 band, and ultra-high frequencies (e.g., the N77 or N78 bands), and the second antenna 20 can generate one resonant mode to support the WiFi 5G band. In other words, the embodiment of the present application can generate four resonant modes to support four frequency bands. Without adding additional switches, the four frequency bands can be supported simultaneously to support the CA state of these four frequency bands, thereby improving the communication performance of electronic devices. Furthermore, the first radiator 11 and the second radiator 21 occupy only approximately 25 mm of space, which is approximately 0.1 wavelength (free space wavelength) of the first frequency band (GPS L5, 1.18 GHz). In addition, when the first grounding point G1 of the first radiator 11 and the second grounding point G2 of the second radiator 21 are the same grounding point, the first antenna 10 and the second antenna 20 are co-branch design antennas, which can further reduce the space occupied by the antenna component, which is beneficial to improving the overall miniaturization design of the electronic device equipped with the antenna component and the layout flexibility of the electronic device equipped with the antenna component.

[0130] An embodiment of the present application also provides an electronic device, comprising the antenna assembly in any of the aforementioned embodiments.

[0131] For example, for ease of description, the antenna assembly is used as follows Figure 1 The electronic device shown in FIG. is used as an example for illustration. The first radiator 11 and the second radiator 21 of the antenna assembly can be located on the same side of the electronic device, or at a corner of the electronic device. For example, the first radiator 11 and the second radiator 21 of the antenna assembly can be located on any frame of the electronic device, such as the top frame 121, the bottom frame 123, or any side frame.

[0132] like Figure 19a and Figure 19bAs shown, in an exemplary embodiment, the first radiator 11 and the second radiator 21 of the antenna assembly can be located on the top frame 121 of the electronic device. The first radiator 11 between the first feeding point K1 and the first free end is located close to the front camera 130 of the electronic device, while the first ground point G1 can be located away from the front camera 130. Although the excitation current in the area where the first ground point G1 is located is relatively strong, since the first ground point G1 can be located away from the front camera 130, the radiation efficiency of the first antenna 10 and the second antenna 20 is less affected by the front camera 130, thereby improving the radiation efficiency of the antenna assembly.

[0133] Optionally, the radiator and parasitic branch 120 of the antenna assembly are arranged at a corner position of the electronic device. In an exemplary embodiment, the extension directions of the first radiator 11 and the second radiator 21 are different and intersect. Exemplarily, the first radiator 11 may be located at the top frame 121 of the electronic device, and the second radiator 21 may be located at the first side frame 122 or the second side frame 124 of the electronic device. Exemplarily, the first radiator 11 may be located at the bottom frame 123 of the electronic device, and the second radiator 21 may be located at the first side frame 122 or the second side frame 124 of the electronic device. It should be noted that the antenna assembly in any of the aforementioned embodiments can be arranged at any position of the electronic device, not limited to the side or corner.

[0134] like Figure 20 As shown, further, take the above electronic device as a mobile phone as an example for explanation, specifically, Figure 20 As shown, the mobile phone may include a memory 31 (which may optionally include one or more computer-readable storage media), a processing circuit 32, a peripheral device interface 33, an antenna assembly of the above-mentioned embodiment, and an input / output (I / O) subsystem 36. These components may optionally communicate via one or more communication buses or signal lines 39. It will be understood by those skilled in the art that Figure 20 The mobile phone shown does not constitute a limitation of the mobile phone, and may include more or fewer components than shown, or combine certain components, or arrange the components differently. Figure 20 The various components shown in the EMBODIMENTS 100 are implemented in hardware, software, or a combination of hardware and software, including one or more signal processing and / or application specific integrated circuits.

[0135] The memory 31 optionally includes a high-speed random access memory and optionally includes a non-volatile memory, such as one or more magnetic disk storage devices, flash memory devices, or other non-volatile solid-state memory devices. Exemplarily, the software components stored in the memory 31 include an operating system 311, a communication module (or instruction set) 312, a global positioning system (GPS) module (or instruction set) 313, etc.

[0136] Processing circuitry 32 and other control circuitry can be used to control the operation of the mobile phone. The processing circuitry 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 circuitry 32 can be configured to implement control algorithms that control the use of electronic devices in the mobile phone. The processing circuitry 32 can also issue control commands for controlling various switches in the electronic devices.

[0137] I / O subsystem 36 couples input / output peripherals on the phone, such as a keypad and other input control devices, to peripheral interface 33. I / O subsystem 36 optionally includes a touch screen, buttons, a tone generator, an accelerometer (motion sensor), ambient light sensors and other sensors, light-emitting diodes and other status indicators, a data port, and the like. Illustratively, a user can control the operation of the phone by supplying commands via I / O subsystem 36, and can receive status information and other output from the phone using the output resources of I / O subsystem 36. For example, a user can press button 361 to turn the phone on or off.

[0138] The technical features of the above embodiments can be combined arbitrarily. In order to make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification. The above embodiments only express several implementation methods of the present application, and their descriptions are relatively specific and detailed, but they cannot be understood as limiting the scope of the patent of this application. It should be pointed out that for ordinary technicians in this field, without departing from the concept of this application, several variations and improvements can be made, which all fall within the scope of protection of this application. Therefore, the scope of protection of the patent of this application shall be based on the attached claims.

Claims

1. An antenna assembly, characterized in that: include: A first radiator, comprising a first end and a second end opposite to each other, wherein the first radiator further comprises a first feeding point and a first grounding point, the first grounding point being connected to a reference ground, the first feeding point being located between the first grounding point and the first end, and the first end being a first free end; A first feed source, configured to provide a first excitation signal; a first matching circuit, connected to the first feeding point, the first feed source, and the reference ground terminal respectively; The first excitation signal is fed to the first radiator through the first matching circuit, exciting the first radiator to generate a first resonance mode supporting a first frequency band, a second resonance mode supporting a second frequency band, and a third resonance mode supporting a third frequency band; wherein the first frequency band and the second frequency band are GPS frequency bands with different frequency ranges, respectively, and the current distributions of the first resonance mode, the second resonance mode, and the third resonance mode are different.

2. The antenna assembly according to claim 1, wherein: The first matching circuit includes a capacitive component and a matching component connected to the capacitive component, wherein: The first radiator presents an inductive impedance to the second frequency band, and the capacitive component is used to offset the inductive impedance to excite part of the first radiator to generate the first resonant mode, which is a left-hand mode in which current is distributed between the first feeding point and the first grounding point.

3. The antenna assembly according to claim 1, wherein: The second resonant mode is a quarter-wavelength mode in which current is distributed between the first ground point and the first free end.

4. The antenna assembly according to claim 1, wherein: The third resonant mode is a quarter-wavelength mode in which current is distributed between the first feeding point and the first free end.

5. The antenna assembly according to claim 1, wherein: The antenna assembly includes a first feed structure, the first feed source includes a first sub-feed source and a second sub-feed source, wherein, The first sub-feed source is connected to the first feeding point via the feeding structure to excite the first radiator to generate the first resonant mode and the second resonant mode; The second sub-feed source is connected to the first feeding point via the first feeding structure to excite a portion of the first radiator to generate the third resonant mode.

6. The antenna assembly according to claim 1, wherein: The antenna assembly includes a second feeding structure and a third feeding structure, the first feed source includes a first sub-feed source and a second sub-feed source, the first feeding point includes a first sub-feed point and a second sub-feed point, and the distance between the second sub-feed point and the first free end is greater than or equal to a quarter wavelength of the third frequency band; wherein, The first sub-feed source is connected to the first sub-feed point via the second feeding structure to excite the first radiator to generate the first resonant mode and the second resonant mode; The second sub-feed source is connected to the second sub-feed point via the third feeding structure to excite a portion of the first radiator to generate the third resonance mode.

7. The antenna assembly according to claim 1, wherein: The first frequency band is the GPS L5 frequency band, the second frequency band is the GPS L1 frequency band, and the third frequency band is the ultra-high frequency band.

8. The antenna assembly according to any one of claims 1 to 7, characterized in that: The antenna assembly further includes: a second radiator including a third end and a fourth section arranged opposite to each other, the third end being arranged adjacent to or in contact with the first radiator, the second radiator including a second grounding point and a second feeding point arranged in sequence; the fourth section being a second free end, the second grounding point being adjacent to or co-located with the first grounding point and being respectively connected to a reference ground, and the second feeding point being arranged adjacent to the second free end; A second feed source is connected to the second feeding point and is used to provide a second excitation signal to excite the second radiator to generate a fourth resonant mode supporting a fourth frequency band, where the minimum frequency of the fourth frequency band is greater than the maximum frequency of the third frequency band.

9. The antenna assembly according to claim 8, wherein: The fourth resonance mode is a quarter mode in which current is distributed between the second feeding point and the second grounding point.

10. The antenna assembly according to claim 8, wherein: The antenna assembly further includes: The second matching circuit is connected to the second feeding point, the second feed source, and the reference ground terminal respectively, and is used for performing impedance matching on the second excitation signal and filtering the first excitation signal.

11. The antenna assembly according to claim 10, wherein: The second matching circuit includes: a filtering unit, wherein a first end of the filtering unit is connected to the second feeding point, and a second end of the filtering unit is connected to the reference ground end; A matching unit, wherein a first end of the matching unit is connected to the first end of the filtering unit, and a second end of the matching unit is connected to the second feeding point.

12. The antenna assembly according to claim 8, wherein: The fourth frequency band is the WiFi 5G frequency band.

13. An electronic device, characterized in that: include: The antenna assembly according to any one of claims 1 to 12.

14. The electronic device according to claim 13, wherein: The electronic device includes a first radiator and a second radiator, wherein the electronic device further includes: Front camera; A conductive frame, the conductive frame includes a top frame, a first side frame, a bottom frame and a second side frame connected in sequence, wherein the first radiator and the second radiator are both located on the top frame, and the first radiator between the first feeding point and the first free end is arranged close to the front camera, and the first grounding point is arranged away from the front camera.

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