Antenna components and terminal equipment

Abstract

An embodiment of the present application discloses an antenna assembly and a terminal device, wherein the antenna assembly includes: a middle frame, a circuit board, a first antenna radiator and a second antenna radiator, the circuit board is used to set a feed source; the first antenna radiator is connected to the feed source through a matching circuit; the first end of the second antenna radiator is arranged relative to the first end of the first antenna radiator and is separated by a set distance, the second antenna radiator is not grounded, and the second antenna radiator is not connected to the feed source.

Description

Technical Field

[0001] The embodiments of the present application relate to but are not limited to antenna technology, and in particular, to an antenna assembly and a terminal device. Background Art

[0002] With the rapid development of electronic consumer products, the application scope of terminal devices such as mobile phones, cameras, and tablet computers is becoming wider and wider. In order to improve the convenience of using terminal devices, terminal devices can support more and more functions.

[0003] As people's requirements for terminal devices to achieve multi-band are becoming increasingly urgent, how to layout antennas in terminal devices has always been a concern in this field. Summary of the invention

[0004] Embodiments of the present application provide an antenna assembly and a terminal device.

[0005] In a first aspect, an embodiment of the present application provides an antenna assembly, the antenna assembly comprising:

[0006] Middle frame;

[0007] A circuit board for setting the feed source;

[0008] A first antenna radiator is connected to the feed source through a matching circuit;

[0009] A second antenna radiator, wherein the first end of the second antenna radiator is arranged opposite to the first end of the first antenna radiator and is spaced a set distance apart, the second antenna radiator is not grounded, and the second antenna radiator is not connected to the feed source.

[0010] In a second aspect, an embodiment of the present application provides a terminal device, wherein the terminal device includes the above-mentioned antenna assembly.

[0011] In the embodiment of the present application, since the first antenna radiator and the second antenna radiator are arranged at an interval and at a set distance, the first antenna radiator is connected to the feed source through a matching circuit, so that the first antenna radiator can feed the received signal of the first frequency band to the feed source, and the first antenna radiator can also transmit the signal of the first frequency band received from the feed source, and the second antenna radiator can couple the received signal of the second frequency band to the first antenna radiator, so that the first antenna radiator can feed the signal of the second frequency band to the feed source, and the first antenna radiator can also couple the signal of the second frequency band received from the feed source to the second antenna radiator, so that the second antenna radiator transmits the signal of the second frequency band, so that The antenna assembly operates in a dual-band; since the first antenna radiator and the second antenna radiator are arranged end-to-end, compared with a case where the first antenna radiator and the second antenna radiator are not arranged end-to-end, they can occupy a narrower size, thereby facilitating the miniaturization design of a terminal device using the antenna assembly; and since the first antenna radiator is connected to the feed source through a matching circuit, the second antenna radiator is not grounded and is not connected to the feed source, thereby not needing to consider the situation where the second antenna radiator needs to be grounded or connected to the feed source, and further, not needing to consider how the position of the second antenna radiator is set so that it can be grounded or connected to the feed source, thereby enabling the position arrangement of the first radiator and the second radiator to be flexible, thereby reducing the design complexity of the antenna assembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] The drawings described herein are used to provide further understanding of the present application and constitute a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute improper limitations on the present application.

[0013] Figure 1 A schematic diagram of the structure of an antenna assembly provided in an embodiment of the present application;

[0014] Figure 2 A schematic diagram of the structure of another antenna assembly provided in an embodiment of the present application;

[0015] Figure 3 A schematic diagram of the structure of another antenna assembly provided in an embodiment of the present application;

[0016] Figure 4 A schematic diagram of the structure of another antenna assembly provided in an embodiment of the present application;

[0017] Figure 5 A schematic diagram of the structure of another antenna assembly provided in another embodiment of the present application;

[0018] Figure 6 A schematic diagram of a reflection coefficient curve of an antenna assembly provided in an embodiment of the present application;

[0019] Figure 7 A schematic diagram of a radiation performance curve of an antenna assembly provided in an embodiment of the present application;

[0020] Figure 8 A schematic diagram of current distribution of a second antenna radiator provided in an embodiment of the present application;

[0021] Fig. 9 for Figure 1 Schematic diagram of current distribution and electric field distribution of the second antenna radiator in the corresponding antenna assembly. DETAILED DESCRIPTION

[0022] The technical solution of the present application will be described in detail below through embodiments and in conjunction with the accompanying drawings. The following specific embodiments can be combined with each other, and the same or similar concepts or processes may not be repeated in some embodiments.

[0023] It should be noted that in the examples of the present application, "first", "second", etc. are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence.

[0024] In addition, the technical solutions described in the embodiments of the present application can be combined arbitrarily without conflict. In the description of the present application, "multiple" means two or more, unless otherwise clearly and specifically defined.

[0025] Terminal devices can be used not only as communication devices, but also as multimedia devices with rich functions. As the design of terminal devices becomes more and more complex, the space left for antennas is getting smaller and smaller. However, it is necessary to form multi-band or broadband antennas in a smaller space. In the related art, the parasitic radiator is usually short-circuited to form a dual-band working antenna. However, this method limits the form of the parasitic radiator and is not conducive to the flexible setting of the antenna.

[0026] The embodiments of the present application provide an antenna assembly and a terminal device, wherein the antenna assembly may be a partial assembly in the terminal device, or it can be said that the antenna assembly may be applied in the terminal device.

[0027] The terminal device in the embodiment of the present application may be referred to as a terminal, user equipment (UE), mobile station (MS), mobile terminal (MT), etc. The terminal device here may be one of the following: a server, a mobile phone, a tablet computer (Pad), a computer with wireless transceiver function, a handheld computer, a desktop computer, a personal digital assistant, a portable media player, a smart speaker, a navigation device, a smart watch, smart glasses, a smart necklace and other wearable devices, a pedometer, a digital TV, a virtual reality (VR) terminal device, an augmented reality (AR) terminal device, a wireless terminal in industrial control (IndustrialControl), a wireless terminal in self-driving (SelfDriving), a wireless terminal in remote medical surgery (RemoteMedicalSurgery), a wireless terminal in smart grid (SmartGrid), a wireless terminal in transportation safety (TransportationSafety), a wireless terminal in smart city (SmartCity), a wireless terminal in smart home (SmartHome), a car in a vehicle networking system, a vehicle-mounted device, a vehicle-mounted module, etc.

[0028] Figure 1 A schematic diagram of the structure of an antenna assembly provided in an embodiment of the present application is shown in FIG. Figure 1 As shown, the antenna assembly 10 includes: a middle frame 11 , a circuit board (not shown), a first antenna radiator 12 and a second antenna radiator 13 .

[0029] The shape of the middle frame 11 may be a quadrilateral, such as a rectangle or a square. The middle frame 11 may be an integrally formed part or may be formed by combining at least two parts. The material of the middle frame 11 may be a metal material, a non-metal material, or a combination of a metal material and a non-metal material. Among them, the metal material may include one of the following or a combination of at least two: aluminum alloy, stainless steel, steel-aluminum composite material, titanium alloy. Among them, the aluminum alloy may include a magnesium-aluminum alloy. The non-metal material may include plastic.

[0030] For example, in some embodiments, the material of the middle frame 11 may be entirely metal, thereby improving the strength of the middle frame 11. In other embodiments, the material of the middle frame 11 may be entirely plastic, thereby reducing the weight of the middle frame 11. In still other embodiments, the middle frame 11 may include a middle portion and a frame portion disposed around the middle portion, the middle portion may be made of metal, and the frame portion may be made of plastic, or the middle portion may be made of plastic, and the frame portion may be made of metal, thereby achieving a compromise between the strength of the middle frame 11 and the weight of the middle frame 11.

[0031] In some embodiments, when the middle frame 11 is made entirely of metal, an insulating material may be provided on the surface of the middle frame 11 to prevent the middle frame 11 from affecting the performance of the antenna assembly 10 .

[0032] In some embodiments, the middle frame 11 may be grounded to shield the interference of external electromagnetic signals on the radio frequency signal. In this case, the middle frame 11 may be a metal middle frame or a middle frame made of other conductive materials. In other embodiments, the middle frame 11 may not be grounded. In this case, the middle frame 11 may be a plastic middle frame or a middle frame made of other non-conductive materials.

[0033] The circuit board is used to set the feed source 14. The feed source 14 can be connected to the first end of the radio frequency module (also called radio frequency chip), and the second end of the radio frequency module can be connected to the processor. For example, the second end of the radio frequency module is connected to the first end of the baseband chip, and the second end of the baseband chip is connected to the processor. The circuit board may include at least one of the following: a main board, a small board, and a flexible printed circuit (FPC).

[0034] The mainboard may be provided with at least one of the following: baseband chip, power management chip, radio frequency module (including radio frequency processor and radio frequency power amplifier component), processor, memory, various controllers, microphone, receiver, speaker, camera, interface of display screen, etc. Among them, each controller may include at least one of the following: touch screen controller, Bluetooth controller, wireless fidelity (Wireless Fidelity, WIFI) controller, sensor controller, etc.

[0035] The small board can be rectangular, strip-shaped or ribbon-shaped. The small board can be arranged at the bottom of the terminal device, and at least one of a communication interface, a headphone interface, a microphone sound hole and a speaker sound hole can be arranged at the bottom of the terminal device. At least one of the following can also be arranged on the small board: a microphone, a motor vibrator, a communication interface, and a fingerprint module. The communication interface can be a Universal Serial Bus (USB) interface or a Lightning interface, and the USB interface can include: a Type-A interface, a Type-B interface or a Type-C interface. The fingerprint module can be an under-screen fingerprint module or other fingerprint modules.

[0036] The first antenna radiator 12 is connected to the feed source 14 through a matching circuit 15 .

[0037] The first end of the second antenna radiator 13 is arranged opposite to the first end of the first antenna radiator 12 and is spaced apart by a set distance, the second antenna radiator 13 is not grounded, and the second antenna radiator 13 is not connected to the feed source 14. In some embodiments, the second antenna radiator 13 may not be connected to the middle frame 11.

[0038] The materials of the first antenna radiator 12 and the second antenna radiator 13 may be the same or different. For example, in some embodiments, the materials of the first antenna radiator 12 and the second antenna radiator 13 may be the same, and both may be metal materials or polymer materials. The metal material may be a single metal material such as copper or aluminum, or the metal material may be an alloy material, and the alloy material may include a copper alloy material or an aluminum alloy material. The polymer material may include one of the following: polyimide (PI), modified polyimide (MPI), and liquid crystal polymer (LCP). The material of the first antenna radiator 12 may be the same or different from the material of the middle frame 11. The embodiment of the present application does not limit the materials of the middle frame 11, the first antenna radiator 12, and the second antenna radiator 13.

[0039] The first antenna radiator 12 and / or the second antenna radiator 13 may be an integrally formed part or a combined part. The first antenna radiator 12 and / or the second antenna radiator 13 may be fixedly disposed relative to the middle frame 11 .

[0040] In some embodiments, the first antenna radiator 12 may be fixedly connected to the middle frame 11. In some embodiments, the first antenna radiator 12 may be integrally formed with the middle frame 11. For example, the first antenna radiator 12 may be injection molded and / or stamped in the same process as the middle frame 11. The second antenna radiator 13 may also be fixedly connected to the middle frame 11. Exemplarily, the first antenna radiator 12 and / or the second antenna radiator 13 may be fixedly connected to the middle frame 11 in a detachable or non-detachable manner.

[0041] In other embodiments, the antenna assembly 10 may further include a shell, and the first antenna radiator 12 and the second antenna radiator 13 may not be fixedly connected to the middle frame 11, but may be fixedly connected to the shell. Exemplarily, the first antenna radiator 12 and / or the second antenna radiator 13 may be fixedly connected to the shell in a detachable or non-detachable manner. The shell may include a front shell and / or a rear shell. The middle frame 11 is disposed between the front shell and the rear shell, the front shell is used to fix the display module of the terminal device, and an accommodation space may be formed between the rear shell and the middle frame 11 to accommodate components such as circuit boards and batteries.

[0042] For example, the first antenna radiator 12 and / or the second antenna radiator 13 may be fixedly connected to the middle frame 11 or the shell by at least one of screwing, snapping, plugging, bonding, welding, connecting through an antenna bracket, etc.

[0043] In some embodiments, the first antenna radiator 12 and / or the second antenna radiator 13 may be fixed to the middle frame 11 by at least one fixing member. For example, one or more fixing members may be fixed to one end of the first antenna radiator 12 close to the second antenna radiator 13, so that the first antenna radiator 12 may be fixed to the middle frame by one or more fixing members. For another example, a fixing member may be fixed at the middle position or near the middle position of the second antenna radiator 13, and the second antenna radiator 13 may be fixed relative to the middle frame 11 by the fixing member. For another example, two fixing members may be fixed at both ends (which may be ends or positions close to ends) of the second antenna radiator 13, and the second antenna radiator 13 may be fixed relative to the middle frame 11 by the two fixing members.

[0044] The first antenna radiator 12 and / or the second antenna radiator 13 may receive or send a wireless signal, and the wireless signal may include at least one of the following: a radio frequency signal, a Bluetooth signal, a WIFI signal, and the like.

[0045] The first antenna radiator 12 and the second antenna radiator 13 may be arranged around the middle frame 11. For example, the first antenna radiator 12 may be arranged on one side of the middle frame 11, and the second antenna radiator 13 may be arranged on one side of the middle frame 11. In some embodiments, the first antenna radiator 12 and the second antenna radiator 13 may be arranged on the plane where the middle frame 11 is located. For example, the projections of the first antenna radiator 12 and the second antenna radiator 13 on the plane where the middle frame 11 is located do not overlap with the middle frame 11. In other embodiments, the first antenna radiator 12 and the second antenna radiator 13 may be arranged on the upper surface or the lower surface of the middle frame 11. For example, the projections of the first antenna radiator 12 and the second antenna radiator 13 on the plane where the middle frame 11 is located are at least partially inside the middle frame 11.

[0046] Exemplarily, the middle frame 11 may have four sides, and the first antenna radiator 12 and / or the second antenna radiator 13 may be arranged beside at least one of the four sides of the middle frame 11. For example, the first antenna radiator 12 and / or the second antenna radiator 13 may be arranged beside any side of the middle frame 11. For another example, the first antenna radiator 12 and / or the second antenna radiator 13 may be arranged beside two adjacent sides of the middle frame 11. Exemplarily, the first antenna radiator 12 is arranged beside the left side of the middle frame 11, and the second antenna radiator 13 is arranged beside the left side and the upper side of the middle frame 11, or the first antenna radiator 12 is arranged beside the left side and the lower side of the middle frame 11, and the second antenna radiator 13 is arranged beside the left side of the middle frame 11, or the first antenna radiator 12 is arranged beside the left side and the lower side of the middle frame 11, and the second antenna radiator 13 is arranged beside the left side and the upper side of the middle frame 11. For another example, the first antenna radiator 12 and / or the second antenna radiator 13 may be disposed next to three adjacent sides of the middle frame 11. Exemplarily, the first antenna radiator 12 may be disposed next to the left side, the lower side, and the right side of the middle frame 11, and / or the second antenna radiator 13 may be disposed next to the left side, the upper side, and the right side of the middle frame 11.

[0047] The first antenna radiator 12 can be connected to a feeding structure (not shown) through a matching circuit 15, and the feeding structure can be connected to a feed source 14. The feeding structure can be referred to as an antenna feeding structure, an antenna feed or a feed. The matching circuit 15 can be referred to as an impedance matching circuit.

[0048] The antenna radiator formed by the combination of the first antenna radiator 12 and the second antenna radiator 13 can operate not only in the first frequency band, but also in the second frequency band. The center frequency point of the first frequency band is different from the center frequency point of the second frequency band.

[0049] In some embodiments, the matching circuit 15 may include an adjustable capacitor, and the impedance of the matching circuit 15 may be matched with the impedance of the antenna radiator (including the first antenna radiator 12 and the second antenna radiator 13) operating in the first frequency band by adjusting the capacitance value of the adjustable capacitor in the matching circuit 15, or the impedance of the matching circuit 15 may be matched with the impedance of the antenna radiator operating in the second frequency band. In other embodiments, the matching circuit 15 may include an adjustable inductor, and the impedance of the matching circuit 15 may be matched with the impedance of the antenna radiator operating in the first frequency band by adjusting the inductance value of the adjustable inductor in the matching circuit 15, or the impedance of the matching circuit 15 may be matched with the impedance of the antenna radiator operating in the second frequency band. In still other embodiments, the matching circuit 15 may include an adjustable capacitor and an adjustable inductor. The adjustable capacitor and the adjustable inductor can be connected in series or in parallel. The impedance of the matching circuit 15 can be matched with the impedance of the antenna radiator operating in the first frequency band by adjusting the capacitance value of the adjustable capacitor and / or the inductance value of the adjustable inductor in the matching circuit 15, or the impedance of the matching circuit 15 can be matched with the impedance of the antenna radiator operating in the second frequency band.

[0050] One implementation method in which the first end of the second antenna radiator 13 is arranged relative to the first end of the first antenna radiator 12 may include: the projection of the first antenna radiator 12 on the first straight line has no overlapping part with the projection of the second antenna radiator 13 on the first straight line. The first straight line may be parallel to the target side of the middle frame 11, and the target side is not only the side for setting the first antenna radiator 12, but also the side for setting the second antenna radiator 13, or it can be said that the first straight line may be parallel to the side of the middle frame 11 where the first end of the first antenna radiator 12 is located, or the first straight line may be parallel to the side of the middle frame 11 where the first end of the second antenna radiator 13 is located.

[0051] The second antenna radiator 13 is not grounded, which means that the second antenna radiator 13 is not grounded in any way. For example, the second antenna radiator 13 is not connected to the grounding circuit of the circuit board. For another example, when the middle frame 11 is grounded, the second antenna radiator 13 is not connected to the middle frame.

[0052] The second antenna radiator 13 not being connected to the feed source 14 may be that the second antenna radiator 13 is not connected to any feed source 14 .

[0053] In some embodiments, a feed source 14 may be provided on the circuit board, and the first antenna radiator 12 is connected to the feed source 14 through a matching circuit 15. In other embodiments, at least two feed sources 14 may be provided on the circuit board, and the first antenna radiator 12 is connected to one of the at least two feed sources 14 through a matching circuit 15, and the at least two feed sources 14 may be used to connect to other radiators except the first antenna radiator 12 and the second antenna radiator 13.

[0054] In some embodiments, the second antenna radiator 13 may be an isolated element, that is, the second antenna radiator 13 may not be connected to any line. For example, the second antenna radiator 13 may be set on one side of the middle frame 11. In other embodiments, in order to reduce the size of the terminal device, the second antenna radiator 13 may be reused. For example, the second antenna radiator 13 may be connected to a specific absorption rate (SAR) sensor, so that the SAR sensor can obtain information (such as capacitance value) detected by the second antenna radiator 13 through the second antenna radiator 13. The SAR sensor can output the detected information to the processor, so that the processor determines whether there is a target object around the second antenna radiator 13 based on the detected information. If it is determined that there is a target object, the transmission power of the radio frequency module can be reduced, and if it is determined that there is no target object, the transmission power of the radio frequency module can be increased. In some embodiments, the second antenna radiator 13 may be a part of the SAR sensor. In other embodiments, the second antenna radiator 13 and the SAR sensor may be two separate elements.

[0055] In the embodiment of the present application, since the first antenna radiator and the second antenna radiator are arranged at an interval and at a set distance, the first antenna radiator is connected to the feed source through a matching circuit, so that the first antenna radiator can feed the received signal of the first frequency band to the feed source, and the first antenna radiator can also transmit the signal of the first frequency band received from the feed source, and the second antenna radiator can couple the received signal of the second frequency band to the first antenna radiator, so that the first antenna radiator can feed the signal of the second frequency band to the feed source, and the first antenna radiator can also couple the signal of the second frequency band received from the feed source to the second antenna radiator, so that the second antenna radiator transmits the signal of the second frequency band, so that The antenna assembly operates in a dual-band; since the first antenna radiator and the second antenna radiator are arranged end-to-end, compared with a case where the first antenna radiator and the second antenna radiator are not arranged end-to-end, they can occupy a narrower size, thereby facilitating the miniaturization design of a terminal device using the antenna assembly; and since the first antenna radiator is connected to the feed source through a matching circuit, the second antenna radiator is not grounded and is not connected to the feed source, thereby not needing to consider the situation where the second antenna radiator needs to be grounded or connected to the feed source, and further, not needing to consider how the position of the second antenna radiator is set so that it can be grounded or connected to the feed source, thereby enabling the position arrangement of the first radiator and the second radiator to be flexible, thereby reducing the design complexity of the antenna assembly.

[0056] Continue reading Figure 1 In some embodiments, the end of the second end of the first antenna radiator 12 extends a protrusion 16 in a direction close to the middle frame 11, and the protrusion 16 is connected to the middle frame 11. In this way, in some embodiments, the projection of the first antenna radiator 12 on a plane parallel to the middle frame 11 can be L-shaped. In other embodiments, the projection of the first antenna radiator 12 on a plane parallel to the middle frame 11 can be T-shaped.

[0057] The first end and the second end of the first antenna radiator 12 are respectively opposite ends of the first antenna radiator 12. In some embodiments, the protrusion 16 may be a component of the first antenna radiator 12, that is, the first antenna radiator 12 includes the protrusion 16. In other embodiments, the first antenna radiator 12 may not include the protrusion 16, and the first antenna radiator 12 is connected to the protrusion 16.

[0058] The protrusion 16 can be fixedly connected to the middle frame 11 by at least one of screw connection, snap connection, plug connection, bonding, welding, etc. In some embodiments, the protrusion 16 can be directly fixedly connected to the middle frame 11. In other embodiments, the protrusion 16 can be fixedly connected to the antenna bracket or the housing, and then the antenna bracket or the housing is fixedly connected to the middle frame 11 to achieve the fixed connection between the protrusion 16 and the middle frame 11.

[0059] In some embodiments, the matching circuit 15 is connected to a target position of the first antenna radiator 12; the target position is on the side of the first antenna radiator 12 close to the middle frame 11, and the target position is between the middle position of the first antenna radiator 12 and the first end of the first antenna radiator 12.

[0060] The target position may be a position where a feeding point is set. In this way, the first antenna radiator 12 is connected to the matching circuit 15 through the target position, and the target position is between the middle position of the first antenna radiator 12 and the first end of the first antenna radiator 12, so that the impedance of the matching circuit can be easily conjugated with the impedance of the first antenna radiator when it works in the first frequency band, and / or, the impedance of the matching circuit can be easily conjugated with the impedance of the first antenna radiator when it works in the second frequency band, so that the standing wave ratio can be reduced and the signal loss can be reduced.

[0061] In some embodiments, the first antenna radiator 12 is disposed on an extension line of a first end of the second antenna radiator 13, and / or the second antenna radiator 13 is disposed on an extension line of a first end of the first antenna radiator 12. In this embodiment, the first antenna radiator 12 and the second antenna radiator 13 are disposed on one side of the middle frame 11, that is, the first antenna radiator 12 and the second antenna radiator 13 are disposed on only one side of the middle frame 11.

[0062] like Figure 1 As shown, the first antenna radiator 12 and the second antenna radiator 13 are both arranged on a long side of the middle frame 11. It should be noted that in other embodiments, the first antenna radiator 12 and the second antenna radiator 13 can be both arranged on a short side of the middle frame 11. The embodiment of the present application does not limit which side of the middle frame 11 the first antenna radiator 12 and the second antenna radiator 13 are arranged on. For example, the middle frame 11 may include four sides, upper, lower, left and right. The first antenna radiator 12 and the second antenna radiator 13 can be both arranged on the upper side, lower side, left side or right side of the middle frame 11, that is, the first antenna radiator 12 and the second antenna radiator 13 can be arranged through one side of the middle frame 11. In this way, the first antenna radiator 12 and the second antenna radiator 13 can both be linear. In some embodiments, the first antenna radiator 12 and the second antenna radiator 13 can be both arranged on a long side of the middle frame 11, and the long side can be opposite to the side where the physical buttons of the terminal device are set. The physical buttons may include a volume button and / or a switch button.

[0063] In the embodiment of the present application, since the first antenna radiator 12 and the second antenna radiator 13 are arranged on the target side of the middle frame 11, the first antenna radiator 12 is arranged on the extension line of the first end of the second antenna radiator 13, and / or the second antenna radiator 13 is arranged on the extension line of the first end of the first antenna radiator 12, the first antenna radiator 12 and the second antenna radiator 13 can be made flush with the middle frame 11, so that the size in the direction perpendicular to the target side is not increased, and the size in the direction perpendicular to the target side of the terminal device applied to the antenna assembly 10 can be less affected. In addition, the first antenna radiator 12 and the second antenna radiator 13 are both linear, so that the first antenna radiator 12 and the second antenna radiator 13 are easy to manufacture.

[0064] Figure 2 A schematic diagram of the structure of another antenna assembly provided in an embodiment of the present application is shown in FIG. Figure 2 As shown, the antenna assembly 10 includes: a middle frame 11, a circuit board, a first antenna radiator 12 and a second antenna radiator 13. The first antenna radiator 12 is connected to the feed source 14 through a matching circuit 15.

[0065] exist Figure 2 In a corresponding embodiment, the first antenna radiator 12 includes a first part 121 and a second part 122 connected to the first part 121, and there is a first set angle between the first part 121 and the second part 122; wherein the first part 121 is arranged on the extension line of the first end of the second antenna radiator 13.

[0066] In some other embodiments, the second portion 121 may be disposed on an extension line of the first end of the second antenna radiator 13 , or it can be said that the second antenna radiator 13 is disposed on an extension line of the first end of the first antenna radiator 12 .

[0067] The first part 121 and the second part 122 may be integrally formed or assembled. The first part 121 and the second part 122 may be directly connected or connected through other parts. The first setting angle may match the side profile shape of the terminal device to which the antenna assembly 10 is applied. In some embodiments, the first setting angle may be between 90 degrees and 120 degrees, for example, the first setting angle may be 90 degrees, 105 degrees or 120 degrees. Among them, the protrusion 16 is arranged at one end of the second part 122 away from the first part 121.

[0068] In this way, the first part 121 and the second antenna radiator 13 are arranged on a set side of the middle frame 11, and the second part 122 is arranged on a side adjacent to the set side and close to the first part 121, so that when the first antenna radiator 12 and the second antenna radiator 13 cannot be entirely arranged on one side, the arrangement of the first antenna radiator 12 and the second antenna radiator 13 can be achieved by bending the first antenna radiator 12.

[0069] In some embodiments, the second part 122 can be connected to the first part 121 through the fifth part, and the fifth part can be arc-shaped, so that by connecting the second part 122, the fifth part and the first part 121 in sequence, it can adapt to the appearance of the terminal device when the four corners of the terminal device applied to the antenna assembly 10 are arc-shaped.

[0070] Figure 3 A schematic diagram of the structure of another antenna assembly provided in an embodiment of the present application is shown in FIG. Figure 3 As shown, the antenna assembly 10 includes: a middle frame 11, a circuit board, a first antenna radiator 12 and a second antenna radiator 13. The first antenna radiator 12 is connected to the feed source 14 through a matching circuit 15.

[0071] exist Figure 3 In a corresponding embodiment, the second antenna radiator 13 includes a third part 131 and a fourth part 132 connected to the third part 131, and there is a second set angle between the third part 131 and the fourth part 132; wherein the third part 131 is arranged on the extension line of the first end of the first antenna radiator 12.

[0072] In some other embodiments, the fourth portion 132 may be disposed on an extension line of the first end of the first antenna radiator 12 , or it may be said that the first antenna radiator 12 is disposed on an extension line of the first end of the second antenna radiator 13 .

[0073] The third part 131 and the fourth part 132 may be integrally formed or assembled. The third part 131 and the fourth part 132 may be directly connected or connected through other parts. The second set angle may match the side profile shape of the terminal device to which the antenna assembly 10 is applied. In some embodiments, the second set angle may be between 90 degrees and 120 degrees, for example, the second set angle may be 90 degrees, 105 degrees or 120 degrees. The protrusion 16 may be disposed at one end of the first antenna radiator 12 that is away from the second antenna radiator 13.

[0074] In this way, the first antenna radiator 12 and the third part 131 are arranged on a designated side of the middle frame 11, and the fourth part 132 is arranged on a side adjacent to the designated side and close to the third part 131. In this way, when the first antenna radiator 12 and the second antenna radiator 13 cannot be entirely arranged on one side, the arrangement of the first antenna radiator 12 and the second antenna radiator 13 can be achieved by bending the second antenna radiator 13.

[0075] In some embodiments, the fourth part 132 can be connected to the third part 131 through the sixth part, and the sixth part can be arc-shaped, so that by connecting the fourth part 132, the sixth part and the third part 131 in sequence, it can adapt to the appearance of the terminal device when the four corners of the terminal device applied to the antenna assembly 10 are arc-shaped.

[0076] Figure 4 A schematic diagram of the structure of another antenna assembly provided in an embodiment of the present application is shown in FIG. Figure 4 As shown, the antenna assembly 10 includes: a middle frame 11, a circuit board, a first antenna radiator 12 and a second antenna radiator 13. The first antenna radiator 12 is connected to the feed source 14 through a matching circuit 15.

[0077] exist Figure 4 In the corresponding embodiment, the first antenna radiator 12 includes a first portion 121 and a second portion 122 connected to the first portion 121, and a first set angle is formed between the first portion 121 and the second portion 122; the second antenna radiator 13 includes a third portion 131 and a fourth portion 132 connected to the third portion 131, and a second set angle is formed between the third portion 131 and the fourth portion 132;

[0078] The first portion 121 or the second portion 122 is disposed on the extension line of the first end of the second antenna radiator 13, or the third portion 131 or the fourth portion 132 is disposed on the extension line of the first end of the first antenna radiator 12. In some embodiments, the second portion 122 and the fourth portion 132 may be disposed opposite to each other, for example, the second portion 122 and the fourth portion 132 are disposed on two opposite sides of the middle frame 11. The protrusion 16 is disposed at one end of the second portion 122 away from the first portion 121.

[0079] The first part 121 and the second part 122 may be integrally formed or assembled. The first part 121 and the second part 122 may be directly connected or connected through other parts (such as the fifth part). The third part 131 and the fourth part 132 may be integrally formed or assembled. The third part 131 and the fourth part 132 may be directly connected or connected through other parts (such as the sixth part).

[0080] Figure 5 A schematic diagram of the structure of another antenna assembly provided in another embodiment of the present application is shown in FIG. Figure 5 As shown, the antenna assembly 10 includes: a middle frame 11, a circuit board, a first antenna radiator 12 and a second antenna radiator 13. The protrusion 16 is disposed at an end of the first antenna radiator 12 away from the second antenna radiator 13.

[0081] The antenna assembly 10 further includes: a processor 17 , a SAR sensor 18 and a radio frequency module 19 .

[0082] The first end of the SAR sensor 18 is connected to the second antenna radiator 13, and the second end of the SAR sensor 18 is connected to the first end of the processor 17; the first end of the RF module 19 is connected to the feed source 14, and the second end of the RF module 19 is connected to the second end of the processor 17; wherein the SAR sensor 18 is used to sense the distance between the second antenna radiator 13 and the target object, and output the distance to the processor 17; the processor 17 is used to adjust the transmission power of the RF module 19 based on the distance.

[0083] The processor 17 may include any one or more of the following integrations: Application Specific Integrated Circuit (ASIC), Digital Signal Processor (DSP), Digital Signal Processing Device (DSPD), Programmable Logic Device (PLD), Field Programmable Gate Array (FPGA), Central Processing Unit (CPU), Graphics Processing Unit (GPU), Embedded Neural Network Processor (NPU), Controller, Microcontroller, Microprocessor, Programmable Logic Device, Discrete Gate or Transistor Logic Device, Discrete Hardware Components. It is understandable that the electronic device that implements the functions of the processor 17 may also be other, and the embodiments of the present application are not specifically limited.

[0084] In this way, the second antenna radiator 13 can be used not only as a radiator, but also as a sensor of the SAR sensor 18. For example, when the target object (such as a human body) is close to or away from the second antenna radiator 13, an equivalent capacitance is formed between the target object and the second antenna radiator 13, and the SAR sensor 18 can obtain the capacitance value of the sensed equivalent capacitance. The SAR sensor 18 can send the capacitance value to the processor 17 so that the processor 17 adjusts the transmission power of the radio frequency module 19. For example, if the target object is closer to the second antenna radiator 13, the larger the capacitance value sensed by the SAR sensor 18, the processor 17 can adjust the transmission power of the radio frequency module 19 to be lower. Conversely, if the target object is farther from the second antenna radiator 13, the smaller the capacitance value sensed by the SAR sensor 18, the processor 17 can adjust the transmission power of the radio frequency module 19 to be higher.

[0085] By setting the first antenna radiator 12 and the second antenna radiator 13, the first antenna radiator 12 and the second antenna radiator 13 can not only receive and / or send signals of the first frequency, but also receive and / or send signals of the second frequency. The first antenna radiator 12 and the second antenna radiator 13 can send the received signals to the RF module 19 through the matching circuit 15, and the RF module 19 sends the signals to the processor 17 after processing the signals, or the processor 17 sends the signals to the RF module 19 so that the RF module processes the signals, and the RF module 19 sends the signals to the first antenna radiator 12 and the second antenna radiator 13 at the set transmission power.

[0086] exist Figures 1 to 5 In any of the embodiments shown, the length of the first antenna radiator 12 is greater than or equal to one-fourth of the wavelength corresponding to the first frequency band, and the first antenna radiator 12 is used to receive or send signals in the first frequency band; the length of the second antenna radiator 13 is greater than or equal to one-half of the wavelength corresponding to the second frequency band, and the second antenna radiator 13 is used to receive or send signals in the second frequency band; wherein the first frequency band and the second frequency band are different.

[0087] The first frequency band may not overlap with the second frequency band. The center frequency corresponding to the first frequency band may be greater than or less than the center frequency corresponding to the second frequency band.

[0088] The first antenna radiator 12 can receive or send signals in the first frequency band, and the second antenna radiator 13 can receive or send signals in the second frequency band. The second antenna radiator 13 can couple the received signals in the second frequency band to the first antenna radiator 12, so that the first antenna radiator 12 is fed to the feed source. In addition, the first antenna radiator 12 can couple the signals in the second frequency band fed from the feed source to the second antenna radiator 13, and transmit the signals in the second frequency band through the second antenna radiator 13. The first antenna radiator 12 can feed the received signals in the first frequency band to the feed source, and the first antenna radiator 12 can transmit the signals in the first frequency band fed from the feed source.

[0089] In some embodiments, the first antenna radiator 12 receives or sends signals in the first frequency band when it is set alone, and the second antenna radiator 13 receives or sends signals in the second frequency band when it is set alone, that is, the first antenna radiator 12 or the second antenna radiator 13 has the same operating frequency band when it is set independently or spaced apart.

[0090] In other embodiments, the first antenna radiator 12, when set alone, receives or sends a signal in a third frequency band, and the frequency range corresponding to the third frequency band is at least partially different from the frequency range corresponding to the first frequency band. The second antenna radiator 13, when set alone, receives or sends a signal in a fourth frequency band, and the frequency range corresponding to the fourth frequency band is at least partially different from the frequency range corresponding to the second frequency band. When the first antenna radiator 12 and the second antenna radiator 13 are set at an interval, the first antenna radiator 12 and the second antenna radiator 13 influence each other, so that the first antenna radiator 12 receives or sends a signal in the first frequency band, and the second antenna radiator 13 receives or sends a signal in the second frequency band, that is, the first antenna radiator 12 or the second antenna radiator 13 has different operating frequency bands when they are set independently and at an interval.

[0091] Half of the length of the second antenna radiator 13 may be less than the length of the first antenna radiator 12. The first antenna radiator 12 and the second antenna radiator 13 may have two resonant frequencies, the first resonant frequency is the resonant frequency of the quarter wavelength mode of the first antenna radiator 12, and the second resonant frequency is the resonant frequency of the half wavelength mode of the second antenna radiator 13.

[0092] In some embodiments, the length of the first antenna radiator 12 may be a length excluding the protrusion 16. In other embodiments, the length of the first antenna radiator 12 may be a length including the protrusion 16.

[0093] In some embodiments, the length of the first antenna radiator 12 may be a quarter of the wavelength corresponding to the first resonant frequency, and the length of the second antenna radiator 13 may be a half of the wavelength corresponding to the second resonant frequency.

[0094] exist Figures 1 to 5 In any of the embodiments shown, the antenna radiator formed by the combination of the first antenna radiator 12 and the second antenna radiator 13 can receive or send signals in a first frequency band and signals in a second frequency band; the center frequency of the first frequency band is lower than the center frequency of the second frequency band.

[0095] The first resonant frequency point may correspond to the center frequency of the first frequency band, and the second resonant frequency point may correspond to the center frequency of the second frequency band.

[0096] The embodiment of the present application does not limit the values ​​of the first frequency band and the second frequency band. For example, the first frequency band and the second frequency band may be frequency bands specified in the protocol of 4G, 5G or 6G. Exemplarily, the first frequency band may be B3, and the second frequency band may be B41. Another exemplary embodiment, the first frequency band may be B3, and the second frequency band may be B7.

[0097] exist Figures 1 to 5In any of the embodiments shown, the radiation mode of the second antenna radiator 13 is a dipole mode. In some embodiments, when the second antenna radiator 13 operates in the second frequency band, the radiation mode of the second antenna radiator 13 is a dipole mode.

[0098] exist Figures 1 to 5 In any of the embodiments shown, the first end of the second antenna radiator 13 is spaced from the first end of the first antenna radiator 12 by a set distance. The set distance may be determined based on the free space wavelength. For example, the set distance may be the result of multiplying the free space wavelength by a set value, or the set distance may differ from the result of multiplying the free space wavelength by the set value by a preset value. The set value may be between 0.005 and 0.1, for example, the set value may be 0.005, 0.01, 0.02, 0.05 or 0.1, etc. In the embodiment of the present application, the set value is 0.01.

[0099] The free space wavelength can be determined based on at least one of the following: the center frequency of a first frequency band and the center frequency of a second frequency band; the first frequency band is the frequency band in which the first antenna radiator receives or sends signals; the second frequency band is the frequency band in which the second antenna radiator receives or sends signals.

[0100] For example, the average frequency of the center frequency of the first frequency band and the center frequency of the second frequency band may be determined first, and then the free space wavelength may be determined based on the average frequency, thereby determining the set distance. In other embodiments, the center frequency of the first frequency band or the center frequency of the second frequency band may be determined first, and then the free space wavelength may be determined based on the center frequency of the first frequency band or the center frequency of the second frequency band, thereby determining the set distance.

[0101] By setting the distance based on the free space wavelength, the second antenna radiator 13 can couple the signal of the second frequency band to the first antenna radiator 12, or the first antenna radiator 12 can couple the signal of the second frequency band to the second antenna radiator 13.

[0102] Exemplarily, the set distance is greater than or equal to 0.5 mm and less than or equal to 5 mm. For example, the set distance can be 0.5 mm, 1 mm, 1.5 mm, 2 mm or 5 mm, and the embodiment of the present application does not limit the range of the set distance.

[0103] In some embodiments, the middle frame 11 includes a fixing portion, and the first antenna radiator 12 and / or the second antenna radiator 13 is fixed to the middle frame 11 through the fixing portion.

[0104] The fixing portion may be used to fix the first antenna radiator 12 and / or the second antenna radiator 13. The shape of the fixing portion may be adapted to the shape of the first antenna radiator 12 and / or the second antenna radiator 13, so that the fixing portion can fix the position of the first antenna radiator 12 and / or the second antenna radiator 13. The fixing portion may be integrally formed with the middle frame 11 or the fixing portion may be assembled on the middle frame 11. The fixing portion may be in contact with the first antenna radiator 12 and / or the second antenna radiator 13 or not. If the fixing portion is in contact with the first antenna radiator 12 and / or the second antenna radiator 13, the material of the fixing portion is a non-conductive material, so that the fixing portion does not affect the operation of the first antenna radiator 12 and / or the second antenna radiator 13. The fixing portion may be in contact with the first antenna radiator 12 and / or the second antenna radiator 13 through an isolation material, and the isolation material may cover the fixing portion. The material of the fixing portion may be the same as or different from the material of the middle frame 11.

[0105] In some embodiments, the antenna assembly further includes an antenna bracket, the middle frame 11 is fixedly connected to the antenna bracket, and the first antenna radiator 12 and / or the second antenna radiator 13 is fixed to the antenna bracket.

[0106] The shape of the antenna bracket can be adapted to the shape of the first antenna radiator 12 and / or the second antenna radiator 13, so that the antenna bracket can fix the position of the first antenna radiator 12 and / or the second antenna radiator 13. The antenna bracket can be integrally formed or assembled with the middle frame 11. For example, the antenna bracket can be fixed to the middle frame 11 by bonding, welding, clamping and / or screwing. The material of the antenna bracket can be a polymer material such as plastic or a metal. The metal antenna bracket can be coated with an isolation layer to prevent the metal antenna bracket from affecting the operation of the first antenna radiator 12 and / or the second antenna radiator 13.

[0107] In some embodiments, the antenna assembly further includes a shell, the middle frame 11 is fixedly connected to the shell, and the first antenna radiator 12 and / or the second antenna radiator 13 is fixed to the shell.

[0108] The housing may include a front housing and / or a rear housing, and the middle frame 11 is fixedly connected to the housing, and may include the middle frame 11 being fixedly connected to the front housing and / or the rear housing. The first antenna radiator 12 and / or the second antenna radiator 13 may be both fixed to the front housing, or both fixed to the rear housing, or one may be fixed to the front housing and the other may be fixed to the rear housing.

[0109] The front shell can be used to fix the display module, distance sensor, light sensor, front camera and other devices, and the display module, distance sensor, light sensor, front camera and other devices can be connected to the processor 17. The rear shell can be used to fix the rear camera, flashlight and other devices.

[0110] In some embodiments, the first antenna radiator 12 may be a monopole antenna, and the second antenna radiator 13 may be a dipole antenna; or, the first antenna radiator 12 and / or the second antenna radiator 13 may include at least one of the following: a monopole antenna, a helical antenna, a printed circuit board PCB antenna, a microstrip patch antenna, a slot antenna, an inverted F-shaped antenna, a planar inverted F-shaped antenna, a flexible circuit board FPC antenna, a loop antenna, an L-shaped antenna, a T-shaped antenna, a V-shaped antenna, a straight antenna, a snake antenna, and a frame antenna. In the embodiment of the present application, the first antenna radiator 12 is an inverted F-shaped antenna, and the second antenna radiator 13 is a dipole antenna. The embodiment of the present application does not limit the type or shape of the first antenna radiator 12 and the second antenna radiator 13.

[0111] In the embodiment of the present application, the feed source can feed electromagnetic energy to the first antenna radiator 12 through the matching circuit, and couple it to the second antenna radiator 13. The second antenna radiator 13 may not be directly connected to the middle frame 11 and the first antenna radiator 12. The end of the first antenna radiator 12 is connected to the middle frame 11. When the length of the first antenna radiator 12 meets one quarter of the wavelength of the required frequency band F1, effective radiation can be formed. When the length of the second antenna radiator 13 meets one half of the wavelength of the required frequency band F2, effective radiation can also be achieved.

[0112] The following uses an antenna assembly operating in the B3 band and the B41 band of Long Term Evolution (LTE) as an example to explain the basic principle of the dual-band antenna based on the second antenna radiator 13:

[0113] Figure 6 A schematic diagram of a reflection coefficient curve of an antenna assembly provided in an embodiment of the present application, such as Figure 6 As shown, the horizontal axis represents the frequency (in GHz), and the vertical axis represents the reflection coefficient (in dB). It can be seen that the reflection coefficient of the antenna assembly at the first position A and the second position B is the lowest.

[0114] Figure 7 A schematic diagram of a radiation performance curve of an antenna assembly provided in an embodiment of the present application, such as Figure 7As shown, the horizontal axis represents frequency (in GHz) and the vertical axis represents radiation value (in dB). The solid line represents the radiation efficiency curve, which is defined as the ratio of gain to directivity, or the ratio between the power radiated by the antenna and the power received (input). The dotted line represents the total efficiency curve, which is defined as the ratio of the radiated power of the antenna to the stimulated power; compared with the input power, the stimulated power takes into account any reflections that occur at the feeding position. Figure 7 It can be seen that the total efficiency curve reaches a maximum at points C and D, and points C and D are on the radiation efficiency curve.

[0115] from Figure 6 As can be seen from Figure 7, the antenna assembly has two resonance points. The first resonance point is the λ / 4 IFA mode resonance frequency of the first antenna radiator 12, and the second resonance frequency is the λ / 2 dipole mode resonance frequency of the second antenna radiator 13. For the second antenna radiator 13, there is an inherent λ / 2 dipole radiation mode.

[0116] Figure 8 A schematic diagram of current distribution of a second antenna radiator provided in an embodiment of the present application is shown in FIG. Figure 8 As shown, when the second antenna radiator 13 operates in a frequency band corresponding to λ / 2 (eg, B41 frequency band), the two ends of the second antenna radiator 13 are current zero points, and the middle is a current maximum point.

[0117] Fig. 9 for Figure 1 The corresponding schematic diagram of the current distribution and electric field distribution of the second antenna radiator in the antenna assembly is as follows: Fig. 9 As shown, when the second antenna radiator 13 works in the frequency band corresponding to λ / 2 (for example, the B41 frequency band), the two ends of the second antenna radiator 13 are the zero points of the current, and the middle is the maximum point of the current, while the two ends of the second antenna radiator 13 are the strong points of the electric field, and the middle is the weak point of the electric field, which is a typical λ / 2 dipole mode. Among them, the dark circle represents the strong point, and the light circle represents the weak point.

[0118] In the embodiment of the present application, the dual-band antenna assembly formed by the second antenna radiator 13 greatly increases the freedom in designing the dual-band mobile phone antenna, and can meet more appearance structures and integrated SAR sensor 18 requirements.

[0119] By utilizing the λ / 2 dipole inherent radiation mode of the second antenna radiator 13, this mode can exist as an antenna mode for effective radiation. The dipole mode can be effectively excited by the original first antenna radiator 12 (such as an IFA antenna) to form a dual-band mobile phone antenna, for example, it can meet the dual-band communication carrier aggregation (CA) requirements such as B3+B7 or B3+B41. It should be noted that the embodiments of the present application only take the LTE B3+B7 or LTE B3+B41 frequency bands as an example, and the technical solution can be applied to all current mobile communication frequency bands.

[0120] The embodiment of the present application may also provide a terminal device, which may include the antenna assembly in any of the above embodiments. The terminal device may include a front shell and a rear shell, and the description of the front shell and the rear shell may refer to the description of the above embodiments. The terminal device may also include a physical button, which may be set on the side of the terminal device.

[0121] It should be understood that the "one embodiment" or "an embodiment" or "an embodiment of the present application" or "the aforementioned embodiment" or "some implementations" or "some embodiments" mentioned throughout the specification means that the specific features, structures or characteristics related to the embodiment are included in at least one embodiment of the present application. Therefore, "in one embodiment" or "in an embodiment" or "an embodiment of the present application" or "the aforementioned embodiment" or "some implementations" or "some embodiments" appearing throughout the specification do not necessarily refer to the same embodiment. In addition, these specific features, structures or characteristics can be combined in one or more embodiments in any suitable manner. It should be understood that in various embodiments of the present application, the size of the sequence number of the above-mentioned processes does not mean the order of execution, and the execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiment of the present application. The above-mentioned sequence numbers of the embodiments of the present application are only for description and do not represent the advantages and disadvantages of the embodiments.

[0122] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first" and "second" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "multiple" is two or more, unless otherwise clearly and specifically defined.

[0123] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, an electrical connection, or mutual communication; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0124] In the present application, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0125] In the several embodiments provided in the present application, it should be understood that the disclosed devices can be implemented in other ways. The device embodiments described above are only schematic. For example, the division of the units is only a logical function division. There may be other division methods in actual implementation, such as: multiple units or components can be combined, or can be integrated into another system, or some features can be ignored or not executed. In addition, the coupling, direct coupling, or communication connection between the components shown or discussed can be through some interfaces, and the indirect coupling or communication connection of the devices or units can be electrical, mechanical or other forms.

[0126] The units described above as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units; they may be located in one place or distributed on multiple network units; some or all of the units may be selected according to actual needs to achieve the purpose of the present embodiment.

[0127] The features disclosed in several component embodiments provided in this application can be arbitrarily combined without conflict to obtain new component embodiments.

[0128] The features disclosed in several device embodiments provided in this application can be arbitrarily combined without conflict to obtain new device embodiments.

[0129] Alternatively, if the above-mentioned integrated unit of the present application is implemented in the form of a software function module and sold or used as an independent product, it can also be stored in a computer storage medium. Based on this understanding, the technical solution of the embodiment of the present application can essentially or in other words, the part that contributes to the relevant technology can be embodied in the form of a software product, which is stored in a storage medium and includes a number of instructions for a computer device (which can be a personal computer, server, or network device, etc.) to execute all or part of the methods described in each embodiment of the present application. The aforementioned storage medium includes: various media that can store program codes, such as mobile storage devices, ROMs, magnetic disks, or optical disks.

[0130] It is worth noting that the drawings in the embodiments of the present application are only for illustrating the schematic positions of various components on the terminal device and do not represent the actual positions in the terminal device. The actual positions of various components or areas may be changed or offset accordingly according to actual conditions (for example, the structure of the terminal device), and the proportions of different parts of the terminal device in the drawings do not represent the actual proportions.

[0131] As used in the embodiments of the present application and the appended claims, the singular forms "a," "an," "said," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise.

[0132] It should be understood that the term "and / or" used in this article is only a description of the association relationship of associated objects, indicating that three relationships may exist. For example, A and / or B can represent three situations: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article generally indicates that the previous and next associated objects are in an "or" relationship. The above is only an implementation method of the present application, but the scope of protection of the present application is not limited to this. Any technician familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed in this application, which should be covered within the scope of protection of the present application. Therefore, the scope of protection of the present application shall be based on the scope of protection of the claims.

Claims

1. An antenna assembly, characterized in that: The antenna assembly comprises: Middle frame; A circuit board for setting the feed source; A first antenna radiator is connected to the feed source through a matching circuit; the first antenna radiator is used to receive or send a signal in a first frequency band; a second antenna radiator, wherein the first end of the second antenna radiator is arranged opposite to the first end of the first antenna radiator and is spaced a set distance apart, the second antenna radiator is not grounded, and the second antenna radiator is not connected to the feed source; the second antenna radiator is used to receive or send a signal in a second frequency band; the first frequency band and the second frequency band are different; the first antenna radiator is used to couple the signal in the second frequency band received from the feed source to the second antenna radiator, so that the second antenna radiator transmits the signal in the second frequency band; Wherein, the matching circuit is connected to the target position of the first antenna radiator; the target position is on the side of the first antenna radiator close to the middle frame, and the target position is between the middle position of the first antenna radiator and the first end of the first antenna radiator; the target position is the position where the feeding point is set.

2. The antenna assembly according to claim 1, characterized in that: A protrusion extends from the end of the second end of the first antenna radiator toward the direction close to the middle frame, and the protrusion is connected to the middle frame.

3. The antenna assembly according to claim 1, characterized in that: The first antenna radiator is disposed on an extension line of a first end of the second antenna radiator, or the second antenna radiator is disposed on an extension line of a first end of the first antenna radiator.

4. The antenna assembly according to claim 1, characterized in that: The first antenna radiator comprises a first portion and a second portion connected to the first portion, and a first set angle is formed between the first portion and the second portion; Wherein, the first part is arranged on an extension line of the first end of the second antenna radiator.

5. The antenna assembly according to claim 1, characterized in that: The second antenna radiator comprises a third portion and a fourth portion connected to the third portion, and a second set angle is formed between the third portion and the fourth portion; Wherein, the third part is arranged on an extension line of the first end of the first antenna radiator.

6. The antenna assembly according to any one of claims 1 to 5, characterized in that: The antenna assembly further comprises: processor; a specific absorption rate (SAR) sensor, wherein a first end of the SAR sensor is connected to the second antenna radiator, and a second end of the SAR sensor is connected to a first end of the processor; A radio frequency module, wherein a first end of the radio frequency module is connected to the feed source, and a second end of the radio frequency module is connected to a second end of the processor; The SAR sensor is used to sense the distance between the second antenna radiator and the target object, and output the distance to the processor; and the processor is used to adjust the transmission power of the radio frequency module based on the distance.

7. The antenna assembly according to any one of claims 1 to 5, characterized in that: The length of the first antenna radiator is greater than or equal to one quarter of the wavelength corresponding to the first frequency band; The length of the second antenna radiator is greater than or equal to half of the wavelength corresponding to the second frequency band.

8. The antenna assembly according to any one of claims 1 to 5, characterized in that: The set distance is determined based on the free space wavelength; The free space wavelength is determined based on at least one of the following: the center frequency of a first frequency band and the center frequency of a second frequency band; the first frequency band is a frequency band in which the first antenna radiator receives or sends signals; the second frequency band is a frequency band in which the second antenna radiator receives or sends signals.

9. A terminal device, characterized in that: The terminal device comprises the antenna assembly according to any one of claims 1 to 8.

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