Antenna components and electronic equipment

Abstract

The present application provides an antenna assembly and an electronic device, the antenna assembly includes a radiator, a signal source and a tuning circuit, the radiator includes a first sub-radiator and a second sub-radiator, the first sub-radiator and the second sub-radiator are coupled through a coupling gap; the first sub-radiator includes a first grounding terminal and a first coupling terminal, and a feeding point arranged between the first grounding terminal and the first coupling terminal, and the first grounding terminal is grounded; the second sub-radiator includes a second grounding terminal and a second coupling terminal, and a tuning point arranged between the second grounding terminal and the second coupling terminal, the first coupling terminal and the second coupling terminal are spaced apart through a coupling gap, and the second grounding terminal is grounded. The signal source is electrically connected to the feeding point. One end of the tuning circuit is electrically connected to the tuning point, and the other end of the tuning circuit is grounded. The tuning circuit is used to tune the second sub-radiator so that the second sub-radiator supports at least two resonant modes. The present application provides an antenna assembly and an electronic device for increasing the bandwidth of the antenna.

Description

Technical Field

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

[0002] With the development of communication technology, electronic devices with communication functions are becoming more and more popular, and the requirements for Internet access speed are getting higher and higher. Therefore, how to increase the antenna bandwidth of electronic devices has become a technical problem that needs to be solved. Summary of the invention

[0003] The present application provides an antenna assembly and an electronic device for increasing the antenna bandwidth.

[0004] In a first aspect, an embodiment of the present application provides an antenna assembly, including:

[0005] A radiator, comprising a first sub-radiator and a second sub-radiator, wherein a coupling gap is provided between the first sub-radiator and the second sub-radiator, and the first sub-radiator and the second sub-radiator are coupled through the coupling gap; the first sub-radiator comprises a first grounding end and a first coupling end, and a feeding point arranged between the first grounding end and the first coupling end, and the first grounding end is grounded; the second sub-radiator comprises a second grounding end and a second coupling end, and a tuning point arranged between the second grounding end and the second coupling end, the first coupling end and the second coupling end are spaced apart through the coupling gap, and the second grounding end is grounded;

[0006] a signal source, the signal source being electrically connected to the feeding point; and

[0007] A tuning circuit, one end of which is electrically connected to the tuning point, the other end of which is grounded, and the tuning circuit is used to tune the second sub-radiator so that the second sub-radiator supports at least two resonance modes.

[0008] In a second aspect, an embodiment of the present application provides an electronic device, including a shell and the antenna assembly, the radiator is arranged in the shell, on the shell or integrated with the shell, and the tuning circuit and the signal source are arranged in the shell.

[0009] The antenna assembly and electronic device provided by the present application are designed to include a radiator, a signal source and a tuning circuit. The radiator includes a first sub-radiator and a second sub-radiator. There is a coupling gap between the first sub-radiator and the second sub-radiator, and the first sub-radiator and the second sub-radiator are coupled through the coupling gap; the first sub-radiator includes a first grounding end and a first coupling end, and a feeding point arranged between the first grounding end and the first coupling end, and the first grounding end is grounded; the second sub-radiator includes a second grounding end and a second coupling end, and a tuning point arranged between the second grounding end and the second coupling end, the first coupling end and the second coupling end are arranged at intervals through the coupling gap, and the second grounding end is grounded; the signal source is electrically connected to the feeding point, one end of the tuning circuit is electrically connected to the tuning point, and the other end of the tuning circuit is grounded, and the tuning circuit is used to tune the current distribution on the second sub-radiator so that the second sub-radiator supports at least two resonance modes, so that the antenna assembly can support a wider bandwidth, thereby improving the throughput and data transmission rate when the antenna assembly is applied to electronic equipment, and improving the communication quality of the electronic equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. 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 creative work.

[0011] Figure 1 is a structural schematic diagram of an electronic device provided in an embodiment of the present application;

[0012] Figure 2 yes Figure 1 A schematic diagram of the exploded structure of the electronic device shown;

[0013] Figure 3 is a structural schematic diagram of an antenna assembly provided in an embodiment of the present application;

[0014] Figure 4 yes Figure 3 A graph of the S parameters of the antenna assembly shown;

[0015] Figure 5 yes Figure 3 A graph of system efficiency of the antenna assembly shown;

[0016] Figure 6 yes Figure 4 The current density distribution diagram corresponding to the first resonance mode shown;

[0017] Figure 7 yes Figure 4 The current density distribution diagram corresponding to the second resonance mode shown;

[0018] Figure 8 yes Figure 4 The current density distribution diagram corresponding to the third resonance mode shown;

[0019] Fig. 9 yes Figure 4 The current density distribution diagram corresponding to the fourth resonance mode shown;

[0020] Fig.10 is a structural schematic diagram of a first tuning circuit provided in an embodiment of the present application;

[0021] Fig.11 is a structural schematic diagram of a second tuning circuit provided in an embodiment of the present application;

[0022] Fig.12 is a structural schematic diagram of a third tuning circuit provided in an embodiment of the present application;

[0023] Fig.13 is a structural schematic diagram of a fourth tuning circuit provided in an embodiment of the present application;

[0024] Fig.14 is a structural schematic diagram of a fifth tuning circuit provided in an embodiment of the present application;

[0025] Fig.15 yes Figure 3 A schematic diagram of the structure of a matching circuit in the antenna assembly shown;

[0026] Fig.16a yes Figure 3 The schematic diagram of the structure of the first configuration of the adjustable device of the antenna assembly shown;

[0027] Fig.16b yes Figure 3 A schematic diagram of the structure of a second configuration of an adjustable device for an antenna assembly shown;

[0028] Fig.17a yes Figure 3 A schematic diagram of the structure of a third configuration of an adjustable device for an antenna assembly shown;

[0029] Fig.17b yes Figure 3 A schematic structural diagram of a fourth configuration of an adjustable device for an antenna assembly shown;

[0030] Fig.18 yes Figure 3 A schematic structural diagram of a fifth configuration of an adjustable device of the antenna assembly shown;

[0031] Fig.19 yes Figure 3 The S parameter curve diagram of the antenna assembly after the adjustable device is set;

[0032] Fig. 20 yes Figure 3 The antenna assembly is shown in the schematic diagram. Figure 1 ;

[0033] Fig.21 yes Figure 3 The antenna assembly is shown in the schematic diagram. Figure 2 ;

[0034] Fig. 22 yes Figure 3 A schematic diagram of the structure in which the radiator of the antenna assembly is integrated into the frame;

[0035] Fig.23 yes Figure 3 The schematic diagram of the structure in which the radiator of the antenna assembly is arranged within the frame is shown. DETAILED DESCRIPTION

[0036] The technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. In addition, the reference to "embodiment" or "implementation method" in this article means that the specific features, structures or characteristics described in conjunction with the embodiments or implementation methods may be included in at least one embodiment of the present application. The appearance of this phrase in various positions in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0037] Please refer to Figure 1 , Figure 1 A schematic diagram of the structure of an electronic device provided in an embodiment of the present application. The electronic device 1000 includes an antenna assembly 100. The antenna assembly 100 is used to send and receive electromagnetic wave signals to realize the communication function of the electronic device 1000. The present application does not specifically limit the position of the antenna assembly 100 in the electronic device 1000. The electronic device 1000 also includes a display screen 300 and a housing 200 that are mutually covered and connected. The antenna assembly 100 can be arranged inside the housing 200 of the electronic device 1000, or partially integrated with the housing 200, or partially arranged outside the housing 200. Of course, the antenna assembly 100 can also be arranged on the retractable component of the electronic device 1000. In other words, at least part of the antenna assembly 100 can also extend out of the electronic device 1000 with the retractable component of the electronic device 1000, and retract into the electronic device 1000 with the retractable component; or, the overall length of the antenna assembly 100 is extended as the retractable component of the electronic device 1000 is extended.

[0038] The electronic device 1000 includes but is not limited to a telephone, a television, a tablet computer, a mobile phone, a camera, a personal computer, a laptop computer, a vehicle-mounted device, a headset, a watch, a wearable device, a base station, a vehicle-mounted radar, a customer premise equipment (Customer Premise Equipment, CPE), and other devices capable of transmitting and receiving electromagnetic wave signals. In this application, the electronic device 1000 is taken as a mobile phone as an example, and other devices can refer to the specific description in this application.

[0039] For ease of description, the electronic device 1000 is in Figure 1 The perspective in is used as a reference, the width direction of the electronic device 1000 is defined as the X-axis direction, the length direction of the electronic device 1000 is defined as the Y-axis direction, and the thickness direction of the electronic device 1000 is defined as the Z-axis direction. The X-axis direction, the Y-axis direction, and the Z-axis direction are perpendicular to each other. The direction indicated by the arrow is the positive direction.

[0040] See also Figure 2 The housing 200 includes a frame 210 and a back cover 220. A middle plate 410 is formed in the frame 210 by injection molding, and a plurality of mounting slots for mounting various electronic devices are formed on the middle plate 410. The middle plate 410 and the frame 210 together form the middle frame 420 of the electronic device 1000. After the display screen 300, the middle frame 420 and the back cover 220 are covered, a receiving space is formed on both sides of the middle frame 420. The electronic device 1000 also includes a battery, a camera, a microphone, a receiver, a speaker, a face recognition module, a fingerprint recognition module, etc., which are arranged in the receiving space and can realize the basic functions of the mobile phone, which will not be repeated in this embodiment.

[0041] The antenna assembly 100 provided in the present application is described in detail below in conjunction with the accompanying drawings. Of course, the antenna assembly 100 provided in the present application includes but is not limited to the following implementations.

[0042] See also Figure 3 The antenna assembly 100 at least includes a radiator 10, a matching circuit M and a signal source 20.

[0043] See also Figure 3 , the radiator 10 includes a first sub-radiator 11 and a second sub-radiator 12. There is a coupling gap 13 between the first sub-radiator 11 and the second sub-radiator 12. The first sub-radiator 11 and the second sub-radiator 12 are coupled through the coupling gap 13. In this embodiment, the shapes of the first sub-radiator 11 and the second sub-radiator 12 are both straight bars. Of course, in other embodiments, the shapes of the first sub-radiator 11 and the second sub-radiator 12 can also be bent bars or other shapes.

[0044] See also Figure 3The first sub-radiator 11 includes a first ground terminal 111 and a first coupling terminal 112, and a feeding point A disposed between the first ground terminal 111 and the first coupling terminal 112. The first ground terminal 111 is electrically connected to a ground electrode GND1.

[0045] In this embodiment, the first grounding end 111 and the first coupling end 112 are opposite ends of the first sub-radiator 11 in a straight bar shape. In other embodiments, the first sub-radiator 11 is bent, and the first grounding end 111 and the first coupling end 112 may not be opposite to each other in a straight line direction, but the first grounding end 111 and the first coupling end 112 are two ends of the first sub-radiator 11. The first sub-radiator 11 also has a feeding point A disposed between the first grounding end 111 and the first coupling end 112. The present application does not limit the specific position of the feeding point A on the first sub-radiator 11.

[0046] See also Figure 3 , the second sub-radiator 12 includes a second coupling end 121 and a second grounding end 122, and a tuning point B disposed between the second grounding end 121 and the second coupling end 122. The second grounding end 122 is electrically connected to the ground GND2. In this embodiment, the second coupling end 121 and the second grounding end 122 are opposite ends of the first sub-radiator 11 in a straight bar shape. The first sub-radiator 11 and the second sub-radiator 12 can be arranged in a straight line or approximately in a straight line (i.e., there is a smaller tolerance in the design process). Of course, in other embodiments, the first sub-radiator 11 and the second sub-radiator 12 can also be staggered in the extension direction to provide avoidance space for other devices.

[0047] See also Figure 3 , a coupling gap 13 is formed between the first coupling end 112 and the second coupling end 121. The first coupling end 112 and the second coupling end 121 are arranged opposite to each other and spaced apart through the coupling gap 13. The coupling gap 13 is a gap between the first coupling end 112 of the first sub-radiator 11 and the second coupling end 121 of the second sub-radiator 12. For example, the width of the coupling gap 13 is 0.5 to 2 mm, but is not limited to this size. The first sub-radiator 11 and the second sub-radiator 12 can generate capacitive coupling through the coupling gap 13. At one angle, the first sub-radiator 11 and the second sub-radiator 12 can be regarded as two parts of the radiator 10 separated by the coupling gap 13.

[0048] The first sub-radiator 11 and the second sub-radiator 12 are capacitively coupled through the coupling gap 13. "Capacitive coupling" means that an electric field is generated between the first sub-radiator 11 and the second sub-radiator 12, and the signal of the first sub-radiator 11 can be transmitted to the second sub-radiator 12 through the electric field, and the signal of the second sub-radiator 12 can be transmitted to the first sub-radiator 11 through the electric field, so that the first sub-radiator 11 and the second sub-radiator 12 can achieve electrical signal conduction even when they are not in contact or directly connected. In this embodiment, the first sub-radiator 11 can generate an electric field under the excitation of the signal source 20, and the electric field energy can be transmitted to the second sub-radiator 12 through the coupling gap 13, thereby causing the second sub-radiator 12 to generate an excitation current. In other words, the second sub-radiator 12 can also be called a parasitic radiator of the first sub-radiator 11.

[0049] The present application does not specifically limit the shape and structure of the first sub-radiator 11 and the second sub-radiator 12. The shapes of the first sub-radiator 11 and the second sub-radiator 12 include but are not limited to strips, sheets, rods, coatings, films, etc. When the first sub-radiator 11 and the second sub-radiator 12 are in strip shape, the present application does not limit the extension trajectory of the first sub-radiator 11 and the second sub-radiator 12, so the first sub-radiator 11 and the second sub-radiator 12 can be extended in a straight line, a curve, a multi-section bend, etc. The above-mentioned radiator 10 can be a line with uniform width on the extension trajectory, or a strip with different widths such as a gradient width and a widened area.

[0050] Regarding the radiator 10 of the antenna assembly 100 being electrically connected to the ground, the following embodiments are included but are not limited to. Optionally, the antenna assembly 100 itself has a reference ground. In other words, the ground electrodes GND1, GND2, and GND3 are all part of the reference ground of the antenna assembly 100. The specific form of the reference ground includes but is not limited to a metal plate, a metal layer formed inside a flexible circuit board, and the like. The first ground terminal 111 of the first sub-radiator 11 and the second ground terminal 122 of the second sub-radiator 12 are electrically connected to the reference ground through conductive parts such as grounding springs, solder, and conductive adhesive. When the antenna assembly 100 is disposed in an electronic device 1000, the reference ground of the antenna assembly 100 is electrically connected to the reference ground of the electronic device 1000.

[0051] Alternatively, the antenna assembly 100 itself does not have a reference ground, and the radiator 10 of the antenna assembly 100 is electrically connected to the reference ground of the electronic device 1000 or the reference ground of the electronic device in the electronic device 1000 through direct electrical connection or through an intermediate conductive connector. In the present application, taking the antenna assembly 100 disposed in the electronic device 1000 as an example, the metal alloy on the display screen 300 and the middle plate 410 of the electronic device 1000 is used as the reference ground. The first ground terminal 111 and the second ground terminal 122 of the antenna assembly 100 are electrically connected to the reference ground of the electronic device 1000 through conductive parts such as grounding springs, solder, and conductive adhesive. In other words, the ground electrodes GND1, GND2, and GND3 are all part of the reference ground of the electronic device 1000.

[0052] See also Figure 3 Optionally, one end of the matching circuit M is electrically connected to the feed point A. The signal source 20 is electrically connected to the other end of the matching circuit M. The signal source 20 is a radio frequency transceiver chip for sending radio frequency signals or a feeder electrically connected to a radio frequency transceiver chip for sending radio frequency signals. The matching circuit M includes but is not limited to a branch formed by a capacitor-inductor-resistor, or multiple selected branches formed by a switch-capacitor-inductor-resistor, or an adjustable device such as a variable capacitor.

[0053] In the present application, since the signal source 20 is electrically connected to the branches of the first sub-radiator 11, the first sub-radiator 11 can transmit and receive electromagnetic waves under the excitation of the signal source 20. Although the signal source 20 is not electrically connected to the branches of the second sub-radiator 12, the second sub-radiator 12 can be coupled with the first sub-radiator 11, so the excitation current on the first sub-radiator 11 can generate an excitation current in the second sub-radiator 12 through the coupling gap. In other words, the second sub-radiator 12 is indirectly excited by the signal source 20, and the second sub-radiator 12 can also be called a parasitic radiator of the first sub-radiator 11.

[0054] Furthermore, the antenna assembly 100 further includes a tuning circuit P. One end of the tuning circuit P is electrically connected to the tuning point B, and the other end of the tuning circuit P is grounded. The tuning circuit P is used to tune the second sub-radiator 12 so that the second sub-radiator 12 supports at least two resonance modes. It should be noted that the second sub-radiator 12 supports a certain resonance mode, which means that when the antenna assembly 100 works in the resonance mode, the main radiation section is on the second sub-radiator 12, and of course, the first sub-radiator 11 will also participate in the transmission of the resonance current to form a current loop.

[0055] The resonance mode is characterized by the radiator 10 having a higher electromagnetic wave transmission and reception efficiency at and near the resonance frequency. Figure 4In the figure, each concave curve corresponds to a resonance mode. It can be understood that each resonance mode has a resonance frequency (i.e., the frequency corresponding to the lowest point of each concave curve), and each resonance mode covers a frequency band, which includes the resonance frequency. For example, the resonance frequency of a resonance mode is 2.5 GHz, and the frequency band covered by the resonance mode is 1.7 GHz to 2.7 GHz. The above data is only for example and cannot be used to limit the resonance mode described in this application.

[0056] In general technology, the antenna can only support one resonance mode in some actual application frequency band ranges (the actual application frequency band range is, for example, 1450MHz to 6000MHz, and some application frequency band ranges are, for example, 1450MHz to 2700MHz), and one resonance mode is often not sufficient to simultaneously cover a larger bandwidth (for example, it can simultaneously cover the bandwidth of B3+N1, B3+N41 or B3+B1+B7) and is not sufficient to simultaneously support multiple actual application frequency bands (the actual application frequency bands include B1, B3, B7, B39, B41, N1, N3, N7, N39, N41). Therefore, the antenna in general technology cannot simultaneously support B3+N1 or B3+N41, which realizes the dual connection (LTE NR Double Connect, ENDC) combination of 4G wireless access network and 5G-NR, or B3+B1+B7, which realizes carrier aggregation (CA) combination, within 1450MHz to 2700MHz. It should be noted that the above frequency bands are only examples and cannot be used as a limitation of the frequency bands that can be radiated by this application. Among them, the frequency band of B3 is 1710MHz~1785MHz, 1805MHz~1880MHz; the frequency bands of B1 and N1 are both 1920MHz~1980MHz, 2110MHz~2170MHz; the frequency band of B7 is 2550MHz~2570MHz, 2620MHz~2690MHz; the frequency band of N41 is 2496MHz~2690MHz.

[0057] In the embodiment of the present application, by electrically connecting the tuning circuit P to the second sub-radiator 12, the tuning circuit P can cause the second sub-radiator 12 to support at least two different current distributions under the excitation of the first sub-radiator 11. The at least two current distributions enable the second sub-radiator 12 to support at least two resonance modes at the same time. The at least two resonance modes can achieve wider bandwidth coverage or more frequency band coverage, so as to increase the bandwidth of the antenna assembly 100, improve the throughput of the transceiver signal, and improve the data transmission rate of the antenna assembly 100. The resonance frequency of at least one resonance mode in the second sub-radiator 12 is adjusted to a part of the actual application frequency band range (for example, 1450MHz to 2700MHz). For example, the resonant frequencies of at least one resonant mode of the second sub-radiator 12 and one resonant mode of the first sub-radiator 11 are adjusted to within the range of part of the actual application frequency band, so that there are at least two resonant modes within the range of part of the actual application frequency band to achieve wider bandwidth coverage, thereby simultaneously covering a larger bandwidth (for example, being able to simultaneously cover the bandwidth of B3+N1, B3+N41 or B3+B1+B7) and simultaneously supporting multiple practical application frequency bands (the practical application frequency bands include B1, B3, B7, B39, B41, N1, N3, N7, N39, N41). Of course, the resonant frequencies of at least two resonant modes of the second sub-radiator 12 can also be adjusted to within the range of part of the actual application frequency band, so that there are at least two resonant modes within the range of part of the actual application frequency band to achieve wider bandwidth coverage. The present application does not specifically limit whether the resonant mode within the practical application frequency band is provided by the first sub-radiator 11, or by the second sub-radiator 12, or by the first sub-radiator 11 and the second sub-radiator 12. Of course, the above-mentioned partial practical application frequency band range of 1450MHz to 2700MHz is only an example. In other implementations, the partial practical application frequency band range of 1450MHz to 2700MHz may also be 1700MHz to 2700MHz, or 2500MHz to 3600MHz, etc.

[0058] It should be noted that the resonant frequency of the resonant mode is related to the physical length of the radiator. In other words, the physical length of the radiator corresponds to the resonant frequency of the resonant mode one by one. After the physical length of the radiator is determined, the resonant frequency of the resonant mode corresponding to the radiator is determined, and the radiator supports a resonant mode corresponding to its physical length. In this way, the frequency band width covered by the radiator is relatively small. For example, when the physical length of the radiator 10 of the antenna is determined, the resonant frequency of the radiator 10 is determined. If the second sub-radiator 12 is not improved, the second sub-radiator 12 cannot support relatively more resonant modes, and thus, cannot simultaneously support a wider bandwidth or more frequency bands.

[0059] The antenna assembly 100 and the electronic device 1000 provided in the present application are designed to include a radiator 10, a signal source 20 and a tuning circuit P. The radiator 10 includes a first sub-radiator 11 and a second sub-radiator 12. There is a coupling gap 13 between the first sub-radiator 11 and the second sub-radiator 12. The first sub-radiator 11 and the second sub-radiator 12 are coupled through the coupling gap 13. The first sub-radiator 11 includes a first grounding terminal 111 and a first coupling terminal 112, and a feeding point A is arranged between the first grounding terminal 111 and the first coupling terminal 112. The first grounding terminal 111 is grounded. The second sub-radiator 12 includes a second grounding terminal 122 and a second coupling terminal 121. and a tuning point B arranged between the second grounding terminal 122 and the second coupling terminal 121, the first coupling terminal 112 and the second coupling terminal are arranged at intervals through the coupling gap 13, and the second grounding terminal is grounded; the signal source 20 is electrically connected to the feeding point A, one end of the tuning circuit P is electrically connected to the tuning point B, and the other end of the tuning circuit P is grounded, and the tuning circuit P is used to tune the current distribution on the second sub-radiator 12, so that the second sub-radiator 12 supports at least two resonant modes, so that the antenna assembly 100 can simultaneously support a wider bandwidth or cover more frequency bands, thereby improving the throughput and data transmission rate of the antenna assembly 100 when applied to the electronic device 1000, and improving the communication quality of the electronic device 1000. In addition, when the bandwidth of the antenna assembly 100 is wide, no adjustable device is required to switch different frequency bands, thereby eliminating the adjustable device, saving costs, and achieving a simple structure of the antenna assembly 100.

[0060] The tuning circuit P provided in the present application can enable the second sub-radiator 12 to support at least two resonance modes. This embodiment is illustrated by taking the tuning circuit P as an example to enable the second sub-radiator 12 to support two resonance modes. The implementation method of the second sub-radiator 12 supporting three or more resonance modes can refer to the following embodiments, which will not be repeated here.

[0061] Optionally, the tuning circuit P exhibits different passband or band-stop characteristics at different frequencies. For example, it exhibits a band-stop characteristic at the first preset frequency band (near 2653 MHz), and the tuning circuit P exhibits a passband characteristic at the second preset frequency band (near 4594 MHz). In this way, the tuning circuit P can control the resonant current corresponding to the first preset frequency band to be grounded from the second ground terminal 122, and the tuning circuit P can control the resonant current corresponding to the second preset frequency band to be grounded through the tuning circuit P. In this way, the tuning circuit P makes the resonant currents corresponding to different frequency bands have different current paths, and the different current paths support different resonant modes on the second sub-radiator 12, which can achieve support for two resonant modes on the second sub-radiator 12. When it is necessary to support three or more resonant modes, the number of internal components of the tuning circuit P can be increased or adjusted on the second sub-radiator 12 so that the passband or band-stop frequency bands corresponding to the tuning circuit P are different. The present application does not limit the specific structure of the tuning circuit P, as long as the circuit can achieve the above functions. Subsequent combination Figures 10 to 13 Provide specific examples.

[0062] Optionally, the tuning circuit P is provided to include a tuning capacitor, and the frequency of the resonant mode is adjusted by adjusting the length of the second sub-radiator 12, so that the above-mentioned two resonant modes can also be realized. Furthermore, the tuning circuit P is a tuning capacitor, and the second sub-radiator 12 is grounded through the tuning capacitor. Optionally, the tuning capacitor is a small capacitor. Since the frequencies of the first preset frequency band and the second preset frequency band are different, the capacitive reactance of the tuning capacitor with a small capacitance value is different for different frequency bands. For example, a tuning capacitor with a small capacitance value has better passband performance for relatively high frequencies, and a tuning capacitor with a small capacitance value has a certain band-stop performance for relatively low frequencies. When the first preset frequency band is a relatively low frequency and the second preset frequency band is a relatively high frequency, the tuning capacitor can also distribute paths for the resonant current corresponding to the first preset frequency band and the resonant current corresponding to the second preset frequency band, thereby supporting two resonant modes. Subsequent combination Fig.14 Provide specific examples.

[0063] Optionally, when the device electrically connected to the second sub-radiator 12 of the tuning circuit P is a small capacitor, the small capacitor can be used as a tuning capacitor to achieve path distribution for the resonant current corresponding to the first preset frequency band and the resonant current corresponding to the second preset frequency band, thereby supporting two resonant modes.

[0064] It should be noted that the present application does not make any specific limitation on the first preset frequency band and the second preset frequency band. Optionally, one or both of the first preset frequency band and the second preset frequency band are set within the range of some actual application frequency bands.

[0065] The following Figure 3 The resonance modes supported by the first sub-radiator 11 and the second sub-radiator 12 of the antenna assembly 100 are illustrated as examples.

[0066] Optionally, the first sub-radiator 11 supports at least one resonance mode under the excitation of the signal source 20. The present application does not limit the number of resonance modes supported by the first sub-radiator 11.

[0067] See also Figure 4 , taking the first sub-radiator 11 and the second sub-radiator 12 both supporting two resonant modes as an example. It should be noted that the first sub-radiator 11 supporting a certain resonant mode means that when the antenna component 100 works in the resonant mode, the main radiation section is on the first sub-radiator 11, and of course, the second sub-radiator 12 will also participate in the transmission of the resonant current. The second sub-radiator 12 supporting a certain resonant mode means that when the antenna component 100 works in the resonant mode, the main radiation section is on the second sub-radiator 12, and of course, the first sub-radiator 11 will also participate in the transmission of the resonant current.

[0068] The resonance modes supported by the radiator 10 include a first resonance mode a, a second resonance mode b, a third resonance mode c, and a fourth resonance mode d. The resonance frequencies corresponding to the first resonance mode a, the second resonance mode b, the third resonance mode c, and the fourth resonance mode d are respectively the first resonance frequency Fa, the second resonance frequency Fb, the third resonance frequency Fc, and the fourth resonance frequency Fd. The frequency bands covered by the first resonance mode a, the second resonance mode b, the third resonance mode c, and the fourth resonance mode d are respectively the first frequency band T1, the second frequency band T2, the third frequency band T3, and the fourth frequency band T4.

[0069] Optionally, the first sub-radiator 11 supports two of the first resonance mode a, the second resonance mode b, the third resonance mode c and the fourth resonance mode d, and the second sub-radiator 12 supports the other two of the first resonance mode a, the second resonance mode b, the third resonance mode c and the fourth resonance mode d. Since different resonance frequencies correspond to different radiator lengths, when there are many resonance modes supported and the gap between different resonance frequencies is large, the corresponding radiator length difference is also large. In this embodiment, the resonance modes supported by the first sub-radiator 11 and the second sub-radiator 12 are reasonably allocated, that is, each sub-radiator 10 is respectively provided with two resonance modes, so as to support more resonance modes while ensuring that the overall size of the radiator 10 of the antenna assembly 100 is reduced. In other words, a radiator 10 of a smaller size is used as much as possible to support more resonance modes.

[0070] The present application does not specifically limit the number of resonance modes supported by the first sub-radiator 11 and the number of resonance modes supported by the second sub-radiator 12. In other embodiments, the first sub-radiator 11 supports one resonance mode, and the second sub-radiator 12 supports three resonance modes; or, the first sub-radiator 11 supports three resonance modes, and the second sub-radiator 12 supports two resonance modes; or, the first sub-radiator 11 supports three resonance modes, and the second sub-radiator 12 supports three resonance modes, and so on, which are not listed one by one here.

[0071] Optional, see Figure 4 , the resonance modes supported by the first sub-radiator 11 include the first resonance mode a and the fourth resonance mode d. The resonance modes supported by the second sub-radiator 12 include the second resonance mode b and the third resonance mode c. In this embodiment, the resonance frequencies of the first resonance mode a, the second resonance mode b, the third resonance mode c and the fourth resonance mode d increase in sequence. For example, the resonance frequency of the first resonance mode a is 1.8242 GHz, the resonance frequency of the second resonance mode b is 2.6455 GHz, the resonance frequency of the third resonance mode c is 3.6241 GHz, and the resonance frequency of the fourth resonance mode d is 4.9406 GHz. The above data are only for example and cannot limit the resonance frequencies of the first resonance mode a, the second resonance mode b, the third resonance mode c and the fourth resonance mode d.

[0072] Of course, in other embodiments, the resonant frequencies of the second resonance mode b, the first resonance mode a, the third resonance mode c, and the fourth resonance mode d increase in sequence. In other embodiments, the resonant frequencies of the second resonance mode b, the first resonance mode a, the fourth resonance mode d, and the third resonance mode c increase in sequence. For example, the resonant frequency of the second resonance mode b is 1.8242 GHz, the resonant frequency of the first resonance mode a is 2.6455 GHz, the resonant frequency of the fourth resonance mode d is 3.6241 GHz, and the resonant frequency of the third resonance mode c is 4.9406 GHz. In other embodiments, the resonant frequencies of the first resonance mode a, the fourth resonance mode d, the second resonance mode b, and the third resonance mode c increase in sequence. In other embodiments, the resonant frequencies of the second resonance mode b, the third resonance mode c, the first resonance mode a, and the fourth resonance mode d increase in sequence, and so on, which are not given examples one by one here.

[0073] Optionally, the first resonance mode a and the fourth resonance mode d are respectively the 1 / 4 wavelength mode and the 3 / 4 wavelength mode in which the resonance current operates in the same section of the radiator 10. Among them, the 1 / 4 wavelength mode is the fundamental mode of the antenna, and the conversion efficiency of the antenna receiving or transmitting is relatively high at this time. The 3 / 4 wavelength mode is the 3rd order mode of the antenna.

[0074] By designing the physical length of the first sub-radiator 11, the structure of the matching circuit and the position of the feeding point A, the first sub-radiator 11 supports the first resonance mode a and the fourth resonance mode d, so as to effectively utilize the first sub-radiator 11 to support multiple resonance modes, increase the bandwidth of the antenna component 100 or the number of covered frequency bands, and reduce the overall size of the antenna component 100.

[0075] Among them, the second resonance mode b and the third resonance mode c are adjacent resonance modes. By designing and adjusting the tuning circuit P so that the second sub-radiator 12 supports two resonance modes, the number of resonance modes supported by the second sub-radiator 12 can be increased without changing the length of the second sub-radiator 12. The second resonance mode b and the third resonance mode c are both 1 / 4 wavelength modes supported by different parts of the second sub-radiator 12. In other words, the transceiver conversion efficiency of the frequency bands corresponding to the second resonance mode b and the third resonance mode c is relatively high.

[0076] In the above, the first sub-radiator 11 is designed to support two spaced-apart first resonance modes a and a fourth resonance mode d, and the second sub-radiator 12 is designed to support two adjacent and continuous second resonance modes b and a third resonance mode c, and the second resonance mode b and the third resonance mode c are designed to be located between the first resonance mode a and the fourth resonance mode d. This resonance mode distribution method utilizes a shorter length of the radiator 10 to achieve more resonance modes, which is beneficial to the miniaturization of the antenna assembly 100.

[0077] The present application does not specifically limit the size of the frequency bands corresponding to the first to fourth resonance modes a-d.

[0078] Optional, see Figure 4 , the frequency band covered by the first resonance mode a and the frequency band covered by the second resonance mode b are both medium and high frequency bands. The frequency band covered by the third resonance mode c and the frequency band covered by the fourth resonance mode d are both ultra-high frequency bands. Among them, the medium and high frequency band ranges from 1GHz to 3GHz. The ultra-high frequency band ranges from greater than or equal to 3GHz to 6GHz. In other words, the antenna assembly 100 can support both medium and high frequency bands and ultra-high frequency bands, that is, wide frequency band coverage of medium and high frequency bands + ultra-high frequency bands.

[0079] In other embodiments, the frequency band covered by the first resonance mode a is a low frequency band, the frequency band covered by the second resonance mode b is a medium and high frequency band, the frequency band covered by the third resonance mode c is a medium and high frequency band, and the frequency band covered by the fourth resonance is an ultra-high frequency band. In other embodiments, the frequency band covered by the first resonance mode a is a low frequency band, the frequency band covered by the second resonance mode b is a low frequency band, the frequency band covered by the third resonance mode c is a medium and high frequency band, and the frequency band covered by the fourth resonance is an ultra-high frequency band, and so on, which are not listed one by one here.

[0080] The present application does not make any specific limitation on whether the frequency bands supported by the first to fourth resonance modes a~d are continuous. Specifically, the frequency band supported by the first resonance mode a (i.e., the first frequency band T1), the frequency band supported by the second resonance mode b (i.e., the second frequency band T2), the frequency band supported by the third resonance mode c (i.e., the third frequency band T3), and the frequency band supported by the fourth resonance mode d (i.e., the fourth frequency band T4) may be continuous or discontinuous. Four continuous frequency bands refer to at least two adjacent frequency bands in the four frequency bands at least partially overlapping (including the overlap of one frequency point). Four discontinuous frequency bands refer to no overlap between any two adjacent frequency bands in the four frequency bands. While the above structure of the antenna assembly 100 is relatively simple, it also increases the number of resonance modes of the antenna assembly 100 and the number of frequency bands covered by the antenna assembly 100. Specifically, when the frequency bands covered by the antenna assembly 100 are continuous, adjacent continuous frequency bands are aggregated to form a frequency band with a wider bandwidth, so the antenna assembly 100 achieves wider bandwidth coverage; even if the frequency bands covered by the antenna assembly 100 are not continuous, as the number of frequency bands covered by the antenna assembly 100 increases, the frequency bands that the antenna assembly 100 can load for suppliers will also increase.

[0081] Optionally, the frequency band supported by the first resonance mode a (i.e., the first frequency band T1), the frequency band supported by the second resonance mode b (i.e., the second frequency band T2), the frequency band supported by the third resonance mode c (i.e., the third frequency band T3), and the frequency band supported by the fourth resonance mode d (i.e., the fourth frequency band T4) are aggregated to form a wider frequency band.

[0082] For example, the first frequency band T1 is [1.45GHz~2.25GHz), the second frequency band T2 is [2.25GHz~3GHz), the third frequency band T3 is [3GHz~4.2GHz), and the fourth frequency band T4 is [4.2GHz~6GHz]. The target application frequency band formed by the aggregation of the first frequency band T1, the second frequency band T2, the third frequency band T3, and the fourth frequency band T4 is 1.45GHz~6GHz. In this way, the antenna assembly 100 simultaneously covers any one or more combinations of B3, B39, B1, B7, B41, N3, N39, N1, N7, N41, N77, N78, N79, and other frequency bands within 1.45GHz~6GHz. Figure 4It can be seen that there are two resonance modes a and b in the frequency range of 1450MHz to 2700MHz, which can realize a broadband antenna. Since the impedance value of the matching circuit M affects the resonance frequency of the resonance modes a and b, by changing the impedance matching value of the matching circuit M, the resonance frequency of the resonance modes a and b can be shifted toward high frequency or low frequency within a certain range, thereby making the antenna assembly 100 cover at least part of the frequency bands such as B32 and N75 (for example, the frequency band around 1500MHz). Among them, the frequency bands of B3 and N3 are 1710MHz~1785MHz, 1805MHz~1880MHz; the frequency bands of B39 and N39 are 1880MHz~1920MHz; the frequency bands of B1 and N1 are 1920MHz~1980MHz, 2110MHz~2170MHz; the frequency bands of B7 and N7 are 2550MHz~2570MHz, 2620MHz~2690MHz; the frequency bands of B41 and N41 are 2496MHz~2690MHz; the frequency bands of N77 are 3300MHz~4200MHz; the frequency bands of N78 are 3400MHz~3600MHz; the frequency bands of N79 are 4800MHz~5000MHz.

[0083] It should be noted that the first frequency band T1 is 1.45 GHz to 2.25 GHz, the second frequency band T2 is 2.25 GHz to 3 GHz, the third frequency band T3 is 3 GHz to 4.2 GHz, and the fourth frequency band T4 is 4.2 GHz to 6 GHz. The target application frequency band of 1.45 GHz to 6 GHz is only an example, and the present application is not limited to the above frequency bands. The frequency bands covered by the resonance modes supported by the antenna assembly 100 of the present application include but are not limited to less than 1 GHz, 1 GHz to 6 GHz, and above 6 GHz.

[0084] The present application does not specifically limit the signal type of the frequency band covered by the first resonance mode a to the fourth resonance mode d.

[0085] Optionally, the frequency bands covered by the first resonance mode a to the fourth resonance mode d include the LTE 4G frequency band and / or the NR5G frequency band. When the frequency bands covered by the first resonance mode a to the fourth resonance mode d are all LTE 4G frequency bands or NR 5G frequency bands, the frequency bands covered by the first resonance mode a, the frequency bands covered by the second resonance mode b, the frequency bands covered by the third resonance mode c, and the frequency bands covered by the fourth resonance mode d are aggregated by carrier aggregation to form a target application frequency band. The target application frequency band covers 1.45GHz to 6GHz.

[0086] Optionally, the target application frequency band can support any one of the LTE 4G frequency band and the NR 5G frequency band or both at the same time. In other words, the antenna assembly 100 can support the target application frequency band covering the LTE 4G frequency band of 1.45GHz to 6GHz or the NR 5G frequency band of 1.45GHz to 6GHz. Of course, the antenna assembly 100 can also support the target application frequency band covering a combination of certain frequency bands in the LTE 4G frequency band of 1.45GHz to 6GHz and certain frequency bands in the NR 5G frequency band of 1.45GHz to 6GHz, so as to achieve dual connection of NR 5G and LTE 4G.

[0087] Optionally, the frequency bands received and transmitted by the antenna assembly 100 provided in this embodiment include multiple carriers (carriers are radio waves of a specific frequency) aggregated, that is, carrier aggregation (CA) is implemented to increase the transmission bandwidth, improve throughput, and improve the signal transmission rate. For example, the first frequency band T1 is 1.45GHz to 2.25GHz, the second frequency band T2 is 2.25GHz to 3GHz, the third frequency band T3 is 3GHz to 4.2GHz, and the fourth frequency band T4 is 4.2GHz to 6GHz. The target application frequency band formed by the aggregation of the first frequency band T1, the second frequency band T2, the third frequency band T3, and the fourth frequency band T4 covers 1.45GHz to 6GHz. The frequency bands supported by the antenna assembly 100 for the LTE 4G frequency band include but are not limited to at least one of B1, B2, B3, B4, B7, B32, B38, B39, B40, B41, B48, and B66, and the frequency bands supported by the antenna assembly 100 for the NR 5G frequency band include but are not limited to at least one of N1, N2, N3, N4, N7, N32, N38, N39, N40, N41, N48, and N66. The antenna assembly 100 provided in the present application can cover any combination of the above-mentioned NR 5G frequency bands and LTE 4G frequency bands. Of course, the antenna assembly 100 can load 4G LTE signals alone, or load 5G NR signals alone, or can also load 4G LTE signals and 5G NR signals at the same time, that is, realize dual connection (LTE NR Double Connect, ENDC) of 4G wireless access network and 5G-NR.

[0088] The frequency bands listed above may be medium and high frequency bands that will be used by multiple operators. The antenna assembly 100 provided in the present application can simultaneously support any one or more combinations of the above-mentioned frequency bands, so that the antenna assembly 100 provided in the present application can support electronic device 1000 models corresponding to multiple different operators. There is no need to adopt different antenna structures for different operators, thereby further improving the application scope and compatibility of the antenna assembly 100.

[0089] See also Figure 5 , Figure 5 It is the efficiency of the antenna assembly 100 provided in this application in an extreme full-screen environment. Figure 5 The dashed line is the radiation efficiency curve of the antenna assembly 100, and the solid line is the matching total efficiency curve of the antenna assembly 100. This application uses the display screen 300, the metal alloy in the middle frame 420, etc. as the reference ground GND, and the distance between the radiator 10 of the antenna assembly 100 and the reference ground GND is less than or equal to 0.5mm. In other words, the clearance area of ​​the antenna assembly 100 is 0.5mm, which fully meets the environmental requirements of current mobile phones and other electronic devices 1000. Figure 5 It can be seen that even in a very small clearance area (in a full-screen mobile phone environment), the antenna assembly 100 has a high efficiency bandwidth. From the above, it can be seen that the antenna assembly 100 provided in the present application still has a high radiation efficiency in a very small clearance area, so the antenna assembly 100 is applied to an electronic device 1000 with a small clearance area, and compared with other antennas that require a larger clearance area to have a higher efficiency, the overall volume of the electronic device 1000 can be reduced.

[0090] The above embodiments are examples of achieving wider bandwidth coverage and more frequency band support angles from the perspective of the structure of the antenna assembly 100 and the first to fourth resonance modes a to d. The first to fourth resonance modes a to d are described below with examples in combination with the perspective of the resonance current.

[0091] See also Figures 6 to 9 , the radiator 10 has at least four current density distributions under the excitation of the signal source 20, including a first current density distribution R1, a second current density distribution R2, a third current density distribution R3 and a fourth current density distribution R4.

[0092] See also Figure 6 , the current density distribution corresponding to the first resonance mode a includes but is not limited to the first current density distribution R1: the first resonance current I1 is distributed between the first ground terminal 111 and the second ground terminal 122. The direction of the first resonance current I1 is from the first ground terminal 111 to the first coupling terminal 112, from the second coupling terminal 121 to the second ground terminal 122, or from the second ground terminal 122 to the second coupling terminal 121, and from the first coupling terminal 112 to the first ground terminal 111.

[0093] Specifically, the first resonant current I1 includes a first sub-resonant current I11 and a second sub-resonant current I12. The first sub-radiator 11 generates the first sub-resonant current I11 under the excitation of the signal source 20, and the first sub-resonant current I11 excites the second sub-radiator 12 to generate the second sub-resonant current I12 through the coupling slot 13, wherein the flow direction of the first sub-resonant current I11 is the same as the flow direction of the second sub-resonant current I12.

[0094] The first sub-radiator 11 between the first ground terminal 111 and the first coupling terminal 112 supports the first resonance mode a under the excitation of the first resonance current I1. Optionally, the first resonance mode a is a 1 / 4 wavelength mode. In other words, the physical length of the first sub-radiator 11 between the first ground terminal 111 and the first coupling terminal 112 is approximately 1 / 4 of the wavelength corresponding to the resonance frequency of the first resonance mode a, so that the first sub-radiator 11 between the first ground terminal 111 and the first coupling terminal 112 supports the resonance mode of 1 / 4 wavelength under the excitation of the first resonance current I1, thereby generating a higher transceiver efficiency at and near the resonance frequency of the first resonance mode a.

[0095] See also Figure 7 The current density distribution corresponding to the second resonance mode b includes but is not limited to the second current density distribution R2: the second resonance current I2 corresponding to the second resonance mode b is distributed between the feeding point A and the second ground terminal 122, and the direction of the second resonance current I2 includes but is not limited to flowing from the feeding point A to the first coupling terminal 112, from the second coupling terminal 121 to the second ground terminal 122, or from the second ground terminal 122 to the second coupling terminal 121, and from the first coupling terminal 112 to the feeding point A.

[0096] Specifically, the second resonant current I2 includes a third sub-resonant current I21 and a fourth sub-resonant current I22. The first sub-radiator 11 generates the third sub-resonant current I21 under the excitation of the signal source 20, and the third sub-resonant current I21 excites the second sub-radiator 12 to generate the fourth sub-resonant current I22 through the coupling slot 13, wherein the flow direction of the third sub-resonant current I21 is the same as the flow direction of the fourth sub-resonant current I22.

[0097] The second sub-radiator 12 between the second ground terminal 122 and the second coupling terminal 122 supports the second resonance mode b under the excitation of the second resonance current I2. Optionally, the second resonance mode b is a 1 / 4 wavelength mode. In other words, the physical length of the second sub-radiator 12 between the second ground terminal 122 and the second coupling terminal 122 is approximately 1 / 4 of the wavelength corresponding to the resonance frequency of the second resonance mode b, so that the second sub-radiator 12 between the second ground terminal 122 and the second coupling terminal 122 supports the resonance mode of 1 / 4 wavelength under the excitation of the second resonance current I2, thereby generating a higher transceiver efficiency at and near the resonance frequency of the second resonance mode b.

[0098] See also Figure 8The current density distribution corresponding to the third resonance mode c includes but is not limited to the third current density distribution R3: the third resonance current corresponding to the third resonance mode c is distributed between the feeding point A and the tuning point B, and the direction of the third resonance current I3 includes but is not limited to flowing from the feeding point A to the first coupling end 112, from the second coupling end 121 to the tuning point B, or from the tuning point B to the second coupling end 121, and from the first coupling end 112 to the feeding point A.

[0099] Specifically, the third resonant current I3 includes a fifth sub-resonant current I31 and a sixth sub-resonant current I32. The first sub-radiator 11 generates the fifth sub-resonant current I31 under the excitation of the signal source 20, and the fifth sub-resonant current I31 excites the second sub-radiator 12 to generate the sixth sub-resonant current I32 through the coupling slot 13, wherein the flow direction of the fifth sub-resonant current I31 is the same as the flow direction of the sixth sub-resonant current I32.

[0100] The second sub-radiator 12 between the tuning point B and the second coupling end 122 supports the third resonance mode c under the excitation of the third resonance current I3 .

[0101] See also Fig. 9 , the current density distribution corresponding to the fourth resonance mode d includes but is not limited to the fourth current density distribution R4: the fourth resonance current I4 corresponding to the fourth resonance mode d is distributed between the first ground terminal 111 and the tuning point B. The first sub-radiator 11 between the first ground terminal 111 and the first coupling terminal 112 supports the fourth resonance mode d under the excitation of the fourth resonance current I4.

[0102] Specifically, the fourth resonant current I4 includes a seventh sub-resonant current I41, an eighth sub-resonant current I42 and a ninth resonant current I43. The current flow direction of the seventh sub-resonant current I41 is opposite to the current flow direction of the eighth sub-resonant current I42. The current flow direction of the eighth sub-resonant current I42 is the same as the current flow direction of the ninth resonant current I43.

[0103] The first sub-radiator 11 generates a seventh sub-resonant current I41 and an eighth sub-resonant current I42 under the stimulation of the signal source 20. The seventh sub-resonant current I41 flows from the first ground terminal 111 to the current reversal point D, and the eighth sub-resonant current I42 flows from the first coupling terminal 112 to the current reversal point D. Optionally, the current reversal point D is located between the feeding point A and the first ground terminal 111. The first sub-radiator 11 also stimulates the tuning point B of the second sub-radiator 12 and the second coupling terminal 122 through the coupling slot 13 to generate a ninth resonant current I43, and the ninth resonant current I43 flows to the second coupling terminal 122 through the tuning circuit P and the tuning point B.

[0104] It should be noted that the above current density distribution is the main distribution position of the current density, and it is not limited that all currents are distributed only in the above positions.

[0105] In this embodiment, the tuning circuit P controls the resonant current to go to the ground through the second ground terminal 122 in the first resonance mode a and the second resonance mode b, and controls the resonant current to go to the ground through the tuning circuit P in the third resonance mode c and the fourth resonance mode d. The principle is that the tuning circuit P has different passband and stopband characteristics for different frequency bands. Specifically, the tuning circuit P has at least two resonant frequency points f1 and f2. When the frequency is lower than the first resonant frequency point f1, the tuning circuit P is inductive. The tuning circuit P has a band-stop characteristic for the frequency of the first resonant frequency point f1. When the frequency is between the first resonant frequency point f1 and the second resonant frequency point f2, the tuning circuit P is capacitive. The tuning circuit P has a passband characteristic for the second resonant frequency point f2. When the frequency is higher than the second resonant frequency point f2, the tuning circuit P is inductive.

[0106] Assume that the first resonant frequency point f1 of the tuning circuit P is adjusted to be greater than the resonant frequency of the first resonant mode a and the second resonant mode b. At this time, the tuning circuit P is roughly "open circuit" for the resonant current corresponding to the first resonant mode a and the second resonant mode b, and the resonant current corresponding to the first resonant mode a and the second resonant mode b is mainly grounded through the second grounding terminal 122. In other words, the resonant point of the tuning circuit P in the first resonant mode a and the resonant point of the second resonant mode b are both inductive. In this way, the first current density distribution R1 and the second current density distribution R2 are formed.

[0107] Assume that the first resonant frequency point f1 of the tuning circuit P is adjusted to be less than the resonant frequency of the third resonant mode c and the fourth resonant mode d, and the second resonant frequency point f2 of the tuning circuit P is adjusted to be greater than the resonant frequency of the third resonant mode c and less than the resonant frequency of the fourth resonant mode d, and the resonant frequency of the fourth resonant mode d is close to the second resonant frequency point f2. At this time, the tuning circuit P is grounded with a small inductance near the resonant frequency of the fourth resonant mode d. At this time, the tuning circuit P is roughly "on" for the resonant current corresponding to the third resonant mode c and the fourth resonant mode d, and then the resonant current corresponding to the third resonant mode c and the fourth resonant mode d is mainly grounded through the tuning circuit P. In other words, the resonant point of the tuning circuit P in the third resonant mode c is capacitive, and the resonant point of the fourth resonant mode d is inductive but grounded through a small inductance. In this way, the third current density distribution R3 and the fourth current density distribution R4 are formed.

[0108] The present application does not specifically limit the structure of the tuning circuit P, as long as it can achieve the above-mentioned two resonant frequency points, and be inductive, capacitive and inductive respectively near the two resonant frequency points. The following is an example of several possible implementations of the tuning circuit P in conjunction with the accompanying drawings. Of course, the tuning circuit P provided by the present application includes but is not limited to the following implementations.

[0109] See also Fig.10 , Fig.10 A schematic diagram of a tuning circuit P provided for the first embodiment of the present application. The tuning circuit P includes a first capacitor unit C3 and a first inductor unit L4. One end of the first capacitor unit C3 and one end of the first inductor unit L4 are both electrically connected to a tuning point B. The other end of the first capacitor unit C3 and the other end of the first inductor unit L4 are electrically connected to a ground electrode GND3. The first capacitor unit C3 can adjust the passband frequency band of the tuning circuit P, and the first capacitor unit C3 and the first inductor unit L4 arranged in parallel can adjust the stopband frequency band of the tuning circuit P. By adjusting the capacitance value of the first capacitor unit C3 and the inductance value of the first inductor unit L4, the values ​​of the first resonant frequency point f1 and the second resonant frequency point f2 of the tuning circuit P are adjusted, so that the first resonant frequency point f1 is adjusted to be greater than the resonant frequency of the first resonant mode a and the second resonant mode b, the first resonant frequency point f1 is less than the resonant frequency of the third resonant mode c and the fourth resonant mode d, and the second resonant frequency point f2 is greater than the resonant frequency of the third resonant mode c and the fourth resonant mode d, so as to realize the current density distribution corresponding to the first resonant mode a to the fourth resonant mode d and support the first resonant mode a to the fourth resonant mode d.

[0110] See also Fig.11 , Fig.11 A schematic diagram of a tuning circuit P provided in accordance with a second embodiment of the present application. Fig.10 Based on the tuning circuit P shown. The tuning circuit P also includes a second inductance unit L3. One end of the second inductance unit L3 is electrically connected to the connection node of the other end of the first capacitor unit C3 and the other end of the first inductance unit L4. The other end of the second inductance unit L3 is connected to the ground electrode GND3. By adjusting the capacitance value of the first capacitor unit C3, the inductance value of the first inductance unit L4 and the inductance value of the second inductance unit L3, the values ​​of the first resonant frequency point f1 and the second resonant frequency point f2 of the tuning circuit P are adjusted to adjust the first resonant frequency point f1 to be greater than the resonant frequency of the first resonant mode a and the second resonant mode b, the first resonant frequency point f1 is less than the resonant frequency of the third resonant mode c and the fourth resonant mode d, and the second resonant frequency point f2 is greater than the resonant frequency of the third resonant mode c and the fourth resonant mode d, so as to realize the current density distribution corresponding to the first resonant mode a to the fourth resonant mode d and support the first resonant mode a to the fourth resonant mode d.

[0111] See also Fig.12 , Fig.12 A schematic diagram of a tuning circuit P provided in the third embodiment of the present application. Fig.10 The tuning circuit P shown in FIG. 1 is based on the tuning circuit P shown in FIG. The tuning circuit P also includes a second inductance unit L3. One end of the second inductance unit L3 is electrically connected to the tuning point B. The other end of the second inductance unit L3 is electrically connected to one end of the first capacitor unit C3. That is, the second inductance unit L3 is arranged in series with the first capacitor unit C3. The first capacitor unit C3 and the second inductance unit L3 adjust the passband frequency band. The first capacitor unit C3, the first inductance unit L4 and the second inductance unit L3 adjust the stopband frequency band. By adjusting the capacitance value of the first capacitor unit C3, the inductance value of the first inductance unit L4 and the inductance value of the second inductance unit L3, the values ​​of the first resonant frequency point f1 and the second resonant frequency point f2 of the tuning circuit P are adjusted, so that the first resonant frequency point f1 is adjusted to be greater than the resonant frequency of the first resonant mode a and the second resonant mode b, the first resonant frequency point f1 is less than the resonant frequency of the third resonant mode c and the fourth resonant mode d, and the second resonant frequency point f2 is greater than the resonant frequency of the third resonant mode c and the fourth resonant mode d, so as to realize the current density distribution corresponding to the first resonant mode a to the fourth resonant mode d and support the first resonant mode a to the fourth resonant mode d.

[0112] The first capacitor unit C3, the first inductor unit L4 and the second inductor unit L3 together form a frequency-selective filter circuit, which presents different impedance characteristics for different frequency bands, so that the tuning point B has different boundary conditions in different frequency bands, thereby exciting more modes.

[0113] For example, the capacitance value of the first capacitor unit C3 is 0.8pF, the inductance value of the first inductor unit L4 is 3nH, and the inductance value of the second inductor unit L3 is 1.5nH, so that the tuning circuit P has a band-stop characteristic near 2653MHz, and the tuning circuit P has a band-pass characteristic near 4594MHz. Optionally, the first resonant frequency point f1 is 2653MHz, and the second resonant frequency point f2 is 4594MHz, so that the current of the tuning point B of the first resonant mode a and the second resonant mode b is grounded through the second grounding terminal 122, and the current of the tuning point B of the third resonant mode c and the fourth resonant mode d is grounded through the tuning circuit P.

[0114] See also Fig.13 , Fig.13 This is a schematic diagram of a tuning circuit P provided in the fourth embodiment of the present application. Fig.12Based on the tuning circuit P shown. The tuning circuit P also includes a second capacitor unit C4. One end of the second capacitor unit C4 is electrically connected to one end of the second inductor unit L3. The other end of the second capacitor unit C4 is electrically connected to the other end of the second inductor unit L3. By adjusting the capacitance value of the first capacitor unit C3, the inductance value of the first inductor unit L4, the inductance value of the second inductor unit L3, and the capacitance value of the second capacitor unit C4, the values ​​of the first resonant frequency point f1 and the second resonant frequency point f2 of the tuning circuit P are adjusted to adjust the first resonant frequency point f1 to be greater than the resonant frequency of the first resonant mode a and the second resonant mode b, the first resonant frequency point f1 is less than the resonant frequency of the third resonant mode c and the fourth resonant mode d, and the second resonant frequency point f2 is greater than the resonant frequency of the third resonant mode c and the fourth resonant mode d, so as to realize the current density distribution corresponding to the first resonant mode a to the fourth resonant mode d and support the first resonant mode a to the fourth resonant mode d.

[0115] For example, the frequency band covered by the first resonance mode a supports B1, B39, B3 and other frequency bands, the frequency band covered by the second resonance mode b supports B7, B41 and other frequency bands, the frequency band covered by the third resonance mode c supports N77, N78 and other frequency bands, and the frequency band covered by the fourth resonance mode d supports N79 and other frequency bands. The tuning circuit P presents a large capacitance to ground for the N78 frequency band and a small inductance to ground for the N79 frequency band.

[0116] It should be noted that the tuning circuits P provided in the above-mentioned embodiments can be combined with each other to form a new tuning circuit.

[0117] Optional, see Fig.14 The tuning circuit P includes a tuning capacitor C5. One end of the tuning capacitor C5 is electrically connected to the tuning point B, and the other end of the tuning capacitor C5 is grounded. When the tuning circuit P is electrically connected to the tuning point B, the resonant frequency deviation in the first resonant mode a and the second resonant mode b is adjusted by adjusting (e.g., reducing) the length of the second sub-radiator 12.

[0118] The structure of the matching circuit M is described below by way of example with reference to the accompanying drawings.

[0119] See also Fig.15, the matching circuit M includes a first matching unit M11 and a second matching unit M12. The first matching unit M11 and the second matching unit M12 both include capacitors and inductors. One end of the first matching unit M11 is electrically connected to the feeding point A, the other end of the first matching unit M11 is electrically connected to one end of the second matching unit M12, and another end of the first matching unit M11 is electrically connected to the ground. The other end of the second matching unit M12 is electrically connected to the signal source 20, and another end of the second matching unit M12 is electrically connected to the ground. The first matching unit M11 is used to tune the first resonance mode a, and the second matching unit M12 is used to tune the third resonance mode c; or, the first matching unit M11 is used to tune the third resonance mode c, and the second matching unit M12 is used to tune the first resonance mode a. The first matching unit M11 and the second matching unit M12 are used to jointly tune the second resonance mode b and the fourth resonance mode d.

[0120] Optional, see Fig.15 , the first matching unit M11 includes a first capacitor C1 and a first inductor L1. One end of the first capacitor C1 is electrically connected to the feeding point A. The other end of the first capacitor C1 is electrically connected to one end of the second matching unit M12. One end of the first inductor L1 is electrically connected to the feeding point A. The other end of the first inductor L1 is electrically connected to the ground. And / or, the second matching unit M12 includes a second capacitor C2 and a second inductor L2. One end of the second capacitor C2 is electrically connected to the other end of the first matching unit M11.

[0121] The other end of the second capacitor C2 is electrically connected to the ground. One end of the second inductor L2 is electrically connected to the other end of the first matching unit M11.

[0122] The other end of the second inductor L2 is electrically connected to the signal source 20 .

[0123] By designing the above-mentioned matching circuit M, the impedance matching value on the transmission path of the RF signal output by the signal source 20 can be adjusted to improve the efficiency of the antenna assembly 100 in sending and receiving signals. The resonant frequency from the first resonant mode a to the second resonant mode b can also be tuned to achieve broadband coverage within the actual application frequency band.

[0124] See also Fig.16a , the antenna assembly 100 includes at least one adjustable device T.

[0125] Optional, see Fig.16a One end of the adjustable device T is electrically connected to the matching circuit M and the other end of the adjustable device T is electrically connected to the ground to tune the first resonance mode a and the fourth resonance mode d, thereby adjusting the resonance frequency positions of the first resonance mode a and the second resonance mode b.

[0126] Of course, in other implementations, see Fig.16b, the adjustable device T is integrated into the matching circuit M and forms a circuit T' to tune the first resonance mode a and the fourth resonance mode d, thereby adjusting the resonance frequency positions of the first resonance mode a and the second resonance mode b. It can be understood that the adjustable device T is integrated into the matching circuit M means that the adjustable device T can be used as a part of the matching circuit M. For example Fig.16b The circuit T' in FIG. 1 is a circuit formed by integrating the adjustable device T into the matching circuit M.

[0127] See also Fig.17a One end of the adjustable device T is electrically connected to the tuning circuit P and the other end of the adjustable device T is electrically connected to the ground to tune the second resonance mode b and the third resonance mode c, thereby adjusting the resonance frequency positions of the second resonance mode b and the third resonance mode c.

[0128] Of course, in other implementations, see Fig.17b , the adjustable device T is integrated into the tuning circuit P and forms a circuit T`` to tune the second resonance mode b and the third resonance mode c, thereby adjusting the resonant frequency positions of the second resonance mode b and the third resonance mode c. It can be understood that the adjustable device T is integrated into the tuning circuit P means that the adjustable device T can be used as a part of the tuning circuit P. For example Fig.17b The circuit T`` in FIG. 1 is a circuit formed by integrating an adjustable device T into a tuning circuit P.

[0129] See also Fig.18 , at least one adjustable device T includes a first adjustable device T1 and a second adjustable device (not shown). One end of the first adjustable device T1 is electrically connected to the matching circuit M, and the other end of the first adjustable device T1 is grounded. The first adjustable device T1 is used to tune the first resonance mode a and the fourth resonance mode d to tune the resonance frequency positions of the first resonance mode a and the fourth resonance mode d. Of course, the first adjustable device T1 can also be integrated into the matching circuit M, and specific reference can be made to Fig.16a The implementation methods in will not be repeated here.

[0130] Of course, the second tunable device can also be integrated into the tuning circuit P. Fig.18 T2 in the figure is a circuit formed by integrating the second adjustable device into the tuning circuit P. Of course, in other embodiments, one end of the second adjustable device is electrically connected to the tuning circuit P, and the other end of the second adjustable device is electrically connected to the ground. The second adjustable device T2 is used to tune the second resonance mode b and the third resonance mode c to tune the resonance frequency positions of the second resonance mode b and the third resonance mode c. For details, please refer to Fig.17a The implementation methods in will not be repeated here.

[0131] Optionally, the adjustable device T includes at least one of an antenna switch and a variable capacitor. Optionally, when the adjustable device T includes an antenna switch, the adjustable device T also includes at least one of an inductor, a capacitor, and a resistor. At least one antenna switch, at least one inductor, at least one capacitor, and at least one resistor can be combined with each other to form an adjustable matching circuit that is adjusted to different impedance values. The adjustable matching circuit is electrically connected to the matching circuit M and / or the tuning circuit P. Of course, the adjustable matching circuit can also be directly electrically connected to the first sub-radiator 11 or the second sub-radiator 12 to adjust the resonant frequency offset of the resonant mode. For example, when the adjustable matching circuit is capacitive, the resonant frequency of the resonant mode affected by it moves toward the low frequency direction. When the adjustable matching circuit is inductive, the resonant frequency of the resonant mode affected by it moves toward the high frequency direction. The above achieves the tuning of the first to fourth resonant modes a~d, better covers the actual application frequency band, and further improves the bandwidth of the antenna assembly 100.

[0132] See also Fig.19 , after tuning of the adjustable device T, the curve of the resonant mode supported by the antenna assembly 100 is as follows. The figure shows the curves S1 to S5 presented after adjusting the antenna switch or variable capacitance of the adjustable device T, wherein each curve has a higher efficiency in different frequency bands, for example, the S1 curve can cover the B1 frequency band and has a higher efficiency at the B1 frequency band; the S2 curve can simultaneously cover the B3+N1 frequency band and has a higher efficiency at the B3+N1 frequency band; the S3 curve can simultaneously cover the B3+N41 frequency band and has a higher efficiency at the B3+N41 frequency band; the S4 curve can simultaneously cover the B40 frequency band and has a higher efficiency at the B40 frequency band; the S5 curve can simultaneously cover the B41 frequency band and has a higher efficiency at the B41 frequency band. In this way, by setting and adjusting the adjustable device T, the antenna assembly 100 can have a higher coverage efficiency in the B1, B3+N1, B3+N41, B40, B41 and other frequency bands. The frequency band between point 1 and point 2 in the figure is 1736MHz~2657MHz. As can be seen from the figure, there are 6 resonance modes between point 1 and point 2 (including point 1 and point 2). In this way, by adjusting the adjustable device, the full coverage of 1736MHz~2657MHz can be achieved.

[0133] The present application does not specifically limit the specific location of the radiator 10 of the antenna assembly 100 in the electronic device 1000. For example, see Fig. 20 and Fig.21 , the radiators 10 of the antenna assembly 100 may all be disposed on one side of the electronic device 1000. Alternatively, in other embodiments, the radiators 10 of the antenna assembly 100 are disposed at a corner of the electronic device 1000. The following embodiments are used as examples for specific description.

[0134] See also Figure 2 and Fig. 22 , one side of the frame 210 is connected to the periphery of the back cover 220. The other side of the frame 210 is connected to the periphery of the display screen 300. The frame 210 includes a plurality of side frames connected end to end. Among the plurality of side frames of the frame 210. Two adjacent side frames intersect. For example, two adjacent side frames are perpendicular. The plurality of side frames include a top frame 212 and a bottom frame 213 that are arranged opposite to each other, and a first side frame 214 and a second side frame 215 that are connected between the top frame 212 and the bottom frame 213. The connection between the two adjacent side frames is a corner portion 216. Among them, the top frame 212 and the bottom frame 213 are parallel and equal. The first side frame 214 and the second side frame 215 are parallel and equal. The length of the first side frame 214 is greater than the length of the top frame 212.

[0135] See also Fig. 20 and Fig.21 , the top frame 212 is the side away from the ground when the operator holds the electronic device 1000 and uses it facing the front of the electronic device 1000. The bottom frame 213 is the side facing the ground. Optionally, the radiator 10 is completely arranged on the top frame 210. In this way, when the user uses the electronic device 1000 in portrait mode, the radiator 10 faces the external space and is less blocked, and the efficiency of the antenna assembly 100 is higher. The antenna assembly 100 can be arranged in the upper right corner of the electronic device 1000, and of course it can also be placed at any position of the electronic device 1000.

[0136] The present application does not impose any specific limitation on the arrangement of the antenna assembly 100. Fig. 20 , the radiator 10 is disposed on the top frame 212 near the second side frame 215, and the first sub-radiator 11 is disposed on the side of the second sub-radiator 12 away from the second side frame 215. Alternatively, please refer to Fig.21 The radiator 10 is disposed on the top frame 212 close to the second side frame 215 , and the second sub-radiator 12 is disposed on a side of the first sub-radiator 11 away from the second side frame 215 .

[0137] Optionally, the radiator 10 can be completely disposed on the second side frame 215. In this way, when the user uses the electronic device 1000 in landscape orientation, the radiator 10 faces the external space and is less blocked, and the efficiency of the antenna assembly 100 is higher. Of course, the radiator 10 can also be completely disposed on the first side frame 214.

[0138] Optionally, the radiator 10 may be disposed at a corner 216 of the electronic device 1000. The efficiency of the antenna assembly 100 placed at the corner 216 will be better, the environment of the antenna assembly 100 in the whole machine will also be better, and the stacking of the whole machine will also be easier to achieve. Specifically, a portion of the radiator 10 is disposed on at least one side frame, and another portion is disposed at the corner 216. Specifically, the second sub-radiator 12 is disposed on the top frame 210, the coupling slot 13 is disposed on the side where the top frame 210 is located, and a portion of the first sub-radiator 11 is disposed corresponding to the top frame 210. Another portion of the first sub-radiator 11 is disposed at the corner 216. Another portion of the first sub-radiator 11 is disposed on the side where the second side frame 215 is located. In other words, the radiator 10 is disposed at the corner 216. In this way, when the electronic device 1000 is held in the hand, the radiator 10 is less blocked, further improving the radiation efficiency of the radiator 10.

[0139] Optional, see Fig. 22 , at least part of the radiator 10 of the antenna assembly 100 is integrated with the frame 210. For example, the frame 210 is made of metal. The first sub-radiator 11, the second sub-radiator 12 and the frame 210 are all integrated into one. Of course, in other embodiments, the radiator 10 can also be integrated with the back cover 220. In other words, the first sub-radiator 11 and the second sub-radiator 12 are integrated as a part of the housing 200. Specifically. The reference ground GND, the signal source 20, the matching circuit M, the tuning circuit P, etc. of the antenna assembly 100 are all arranged on the circuit board.

[0140] Optional, see Fig.23 , the first sub-radiator 11 and the second sub-radiator 12 can be formed on the surface of the frame 210. Specifically, the basic forms of the first sub-radiator 11 and the second sub-radiator 12 include but are not limited to the patch radiator 10, which is formed on the inner surface of the frame 210 by laser direct structuring (LDS) and print direct structuring (PDS). In this embodiment, the material of the frame 210 can be a non-conductive material. Of course, the above-mentioned radiator 10 can also be arranged on the back cover 220.

[0141] Optionally, the first sub-radiator 11 and the second sub-radiator 12 are provided on a flexible circuit board. The flexible circuit board is attached to the surface of the frame 210. The first sub-radiator 11 and the second sub-radiator 12 can be integrated on the flexible circuit board, and the flexible circuit board is attached to the inner surface of the middle frame 420 by adhesive or the like. In this embodiment. The material of the frame 210 can be a non-conductive material. Of course, the above-mentioned radiator 10 can also be provided on the inner surface of the back cover 220.

[0142] The antenna assembly 100 provided in the present application excites new coexistence resonance modes by designing the structure of the radiator 10 and adding a tuning circuit P to the ground on the second sub-radiator 12. These resonance modes can achieve ultra-wideband coverage, thereby achieving multi-band ENDC / CA performance, and realizing a broadband antenna, covering medium and high frequency bands + ultra-high frequency bands, medium and high frequency bands + medium and high frequency bands, so as to improve throughput download speed, improve user experience, save costs, and help meet the indicators of major operators.

[0143] The above is part of the implementation methods of the present application. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present application. These improvements and modifications are also considered to be within the scope of protection of the present application.

Claims

1. An antenna assembly, characterized in that: include: A radiator, comprising a first sub-radiator and a second sub-radiator, wherein a coupling gap is provided between the first sub-radiator and the second sub-radiator, and the first sub-radiator and the second sub-radiator are coupled through the coupling gap; the first sub-radiator comprises a first grounding end and a first coupling end, and a feeding point arranged between the first grounding end and the first coupling end, and the first grounding end is grounded; the second sub-radiator comprises a second grounding end and a second coupling end, and a tuning point arranged between the second grounding end and the second coupling end, the first coupling end and the second coupling end are spaced apart through the coupling gap, and the second grounding end is grounded; A signal source, the signal source being electrically connected to the feeding point; and A tuning circuit, one end of the tuning circuit is electrically connected to the tuning point, the other end of the tuning circuit is grounded, the tuning circuit is used to tune the second sub-radiator so that the second sub-radiator supports at least two resonance modes, the resonance modes supported by the radiator include a first resonance mode, a second resonance mode, a third resonance mode and a fourth resonance mode, a first resonance current corresponding to the first resonance mode is distributed between the first ground terminal and the second ground terminal, and a current flow direction between the first ground terminal and the first coupling terminal is the same as a current flow direction between the second coupling terminal and the second ground terminal; a second resonance current corresponding to the second resonance mode is distributed between the feeding point and the second ground terminal, and the feeding point The current flow direction between the first coupling end and the second coupling end is the same as the current flow direction between the second coupling end and the second grounding end; the third resonant current corresponding to the third resonant mode is distributed between the feeding point and the tuning point, and the current flow direction between the feeding point and the first coupling end is the same as the current flow direction between the second coupling end and the tuning point; the fourth resonant current corresponding to the fourth resonant mode is distributed between the first grounding end and the tuning point, wherein a part of the fourth resonant current flows from the first grounding end to the current reversal point, and another part of the fourth resonant current flows from the tuning point through the coupling gap to the current reversal point, and the current reversal point is located between the feeding point and the first grounding end; The resonant point of the tuning circuit in the first resonant mode and the resonant point of the second resonant mode are both inductive, the resonant point of the tuning circuit in the third resonant mode is capacitive, and the resonant point of the fourth resonant mode is inductive.

2. The antenna assembly according to claim 1, wherein: The first sub-radiator supports two of the first resonance mode, the second resonance mode, the third resonance mode, and the fourth resonance mode, and the second sub-radiator supports the other two of the first resonance mode, the second resonance mode, the third resonance mode, and the fourth resonance mode.

3. The antenna assembly according to claim 2, wherein: The resonance modes supported by the first sub-radiator include the first resonance mode and the fourth resonance mode, and the resonance modes supported by the second sub-radiator include the second resonance mode and the third resonance mode, wherein the resonance frequencies of the first resonance mode, the second resonance mode, the third resonance mode and the fourth resonance mode increase sequentially.

4. The antenna assembly according to claim 3, characterized in that The frequency band covered by the first resonance mode and the frequency band covered by the second resonance mode are both medium and high frequency bands, and the frequency band covered by the third resonance mode and the frequency band covered by the fourth resonance mode are both ultra-high frequency bands, wherein the medium and high frequency band ranges from 1 GHz to 3 GHz, and the ultra-high frequency band ranges from greater than or equal to 3 GHz.

5. The antenna assembly according to claim 2, wherein: The frequency bands covered by the first resonance mode to the fourth resonance mode include the LTE 4G frequency band and / or the NR 5G frequency band; when the frequency bands covered by the first resonance mode to the fourth resonance mode are all the LTE 4G frequency band or the NR 5G frequency band, the frequency band covered by the first resonance mode, the frequency band covered by the second resonance mode, the frequency band covered by the third resonance mode, and the frequency band covered by the fourth resonance mode are aggregated to form a target application frequency band, and the target application frequency band covers 1.45GHz to 6GHz.

6. The antenna assembly according to claim 2, wherein: The first sub-radiator between the first ground end and the first coupling end supports the first resonance mode under the excitation of the first resonance current.

7. The antenna assembly according to claim 2, characterized in that: The second sub-radiator between the second ground end and the second coupling end supports the second resonance mode under the excitation of the second resonance current.

8. The antenna assembly according to claim 2, wherein: The second sub-radiator between the tuning point and the second coupling end supports the third resonance mode under the excitation of the third resonance current.

9. The antenna assembly according to claim 2, wherein: The first sub-radiator between the first ground end and the first coupling end supports the fourth resonance mode under the excitation of the fourth resonance current.

10. The antenna assembly according to any one of claims 2 to 9, characterized in that: The tuning circuit includes a first capacitor unit and a first inductor unit, one end of the first capacitor unit and one end of the first inductor unit are both electrically connected to the tuning point, and the other end of the first capacitor unit and the other end of the first inductor unit are both electrically connected to the ground.

11. The antenna assembly according to claim 10, wherein: The tuning circuit further includes a second inductor unit, one end of the second inductor unit is electrically connected to a connection node between the other end of the first capacitor unit and the other end of the first inductor unit, and the other end of the second inductor unit is grounded.

12. The antenna assembly according to claim 10, wherein: The tuning circuit further includes a second inductor unit, one end of the second inductor unit is electrically connected to the tuning point, and the other end of the second inductor unit is electrically connected to one end of the first capacitor unit.

13. The antenna assembly according to claim 11, wherein: The tuning circuit further includes a second capacitor unit, one end of the second capacitor unit is electrically connected to one end of the second inductor unit, and the other end of the second capacitor unit is electrically connected to the other end of the second inductor unit and is grounded.

14. The antenna assembly according to claim 2, wherein: The tuning circuit comprises a tuning capacitor, one end of which is electrically connected to the tuning point, and the other end of which is grounded.

15. The antenna assembly according to any one of claims 2 to 9 and 11 to 14, characterized in that: The antenna assembly further includes a matching circuit, one end of which is electrically connected to the feeding point, and the other end of which is electrically connected to the signal source.

16. The antenna assembly according to claim 15, wherein: The matching circuit comprises a first matching unit and a second matching unit, the first matching unit and the second matching unit both comprise a capacitor and an inductor, one end of the first matching unit is electrically connected to the feeding point, the other end of the first matching unit is electrically connected to one end of the second matching unit, and another end of the first matching unit is electrically connected to the ground; The other end of the second matching unit is electrically connected to the signal source, and another end of the second matching unit is electrically connected to the ground; The first matching unit is used to tune the first resonance mode, and the second matching unit is used to tune the third resonance mode; or, the first matching unit is used to tune the third resonance mode, and the second matching unit is used to tune the first resonance mode; the first matching unit and the second matching unit are used to jointly tune the second resonance mode and the fourth resonance mode.

17. The antenna assembly according to claim 16, wherein: The first matching unit includes a first capacitor and a first inductor, one end of the first capacitor is electrically connected to the feeding point, the other end of the first capacitor is electrically connected to one end of the second matching unit, one end of the first inductor is electrically connected to the feeding point, and the other end of the first inductor is electrically connected to the ground; and / or, The second matching unit includes a second capacitor and a second inductor, one end of the second capacitor is electrically connected to the other end of the first matching unit, the other end of the second capacitor is electrically connected to the ground, one end of the second inductor is electrically connected to the other end of the first matching unit, and the other end of the second inductor is electrically connected to the signal source.

18. The antenna assembly according to claim 15, wherein: The antenna assembly includes at least one adjustable device, and the adjustable device includes at least one of an antenna switch and a variable capacitor; one end of the adjustable device is electrically connected to the matching circuit, and the other end of the adjustable device is grounded, or the adjustable device is integrated in the matching circuit to tune the first resonance mode and the fourth resonance mode; and / or, One end of the adjustable device is electrically connected to the tuning circuit, and the other end of the adjustable device is electrically connected to the ground, or the adjustable device is integrated in the tuning circuit to tune the second resonance mode and the third resonance mode.

19. An electronic device, characterized in that: It comprises a shell and the antenna assembly as claimed in any one of claims 1 to 18, wherein the radiator is arranged in the shell, on the shell or integrated with the shell, and the tuning circuit and the signal source are arranged in the shell.

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