Antenna assembly and terminal device

Abstract

The invention provides an antenna assembly and terminal equipment. The antenna assembly comprises a first branch knot which comprises a feeding point and a first connecting point, the feeding point is connected with a feed source through a matching circuit, and the first connecting point is connected with a ground plane through an adjusting circuit; the second branch knot is parallel to the first branch knot, the second branch knot is not connected with the feed source, and the first branch knot is used for feeding the second branch knot in a coupling mode; the adjusting circuit is used for adjusting a center frequency point of a working frequency band of the first branch knot and / or the second branch knot to obtain a target working frequency band, and the working frequency band of the first branch knot is different from the working frequency band of the second branch knot. According to the embodiment of the invention, the center frequency point of the working frequency band of the antenna assembly is stabilized, and the antenna efficiency is improved.

Description

Technical Field

[0001] The embodiments of the present application relate to the field of wireless communication technology, and more specifically, to an antenna assembly and a terminal device. Background Art

[0002] As communication technology develops day by day, communication electronic devices are widely used. For example, mobile phones have become the most commonly used communication tools. With the maturity of 4G LTE technology and the development of 5G NR and 6G technology, it is foreseeable that the space for mobile phone antennas will become increasingly narrow and the electromagnetic environment will become increasingly worse. At present, antennas supporting multiple frequency bands arranged in a narrow space have the phenomenon that the center frequency of their working frequency bands is unstable, which affects the effective bandwidth and efficiency of the antenna. Summary of the invention

[0003] The embodiments of the present application provide an antenna assembly and a terminal device. Various aspects involved in the embodiments of the present application are introduced below.

[0004] In a first aspect, an antenna assembly is provided, comprising: a first branch, comprising a feed point and a first connection point, the feed point being connected to a feed source through a matching circuit, and the first connection point being connected to a ground plane through an adjustment circuit; a second branch being arranged in parallel with the first branch, the second branch being not connected to the feed source, the first branch being used to feed the second branch in a coupled manner; the adjustment circuit being used to adjust the center frequency of an operating frequency band of the first branch and / or the second branch to obtain a target operating frequency band, the operating frequency band of the first branch being different from the operating frequency band of the second branch.

[0005] In a second aspect, a terminal device is provided, comprising the antenna assembly as described in the first aspect.

[0006] In the embodiment of the present application, the first branch can feed the second branch in a coupled manner, the first connection point of the first branch is connected to the ground plane through an adjustment circuit, and the adjustment circuit can adjust the center frequency of the working frequency band of the first branch and / or the second branch to obtain the target working frequency band. The embodiment of the present application helps to stabilize the center frequency of the working frequency band of the antenna assembly and improve the antenna efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0007] Figure 1 It is a schematic diagram of the structure of the antenna assembly provided in an embodiment of the present application.

[0008] Figure 2 yes Figure 1 A schematic diagram of a possible implementation of .

[0009] Figure 3 yes Figure 2 Schematic diagram of return loss when the first branch is not connected to the adjustment circuit.

[0010] Figure 4 yes Figure 2 Schematic diagram of return loss when the first branch is connected to the adjustment circuit.

[0011] Figure 5 yes Figure 2 Schematic diagram of the efficiency of the antenna assembly.

[0012] Figure 6 It is a schematic diagram of a component unit / partial component unit of a terminal device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0013] 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 part of the embodiments of the present application, rather than all of the embodiments.

[0014] It should be understood that the technical solutions of the embodiments of the present application can be applied to various communication systems, such as: global system of mobile communication (GSM) system, code division multiple access (CDMA) system, wideband code division multiple access (WCDMA) system, general packet radio service (GPRS), long term evolution (LTE) system, LTE frequency division duplex (FDD) system, LTE time division duplex (TDD), universal mobile telecommunication system (UMTS), worldwide interoperability for microwave access (WIMA) communication system, fifth generation (5G) system or new radio (NR), etc. The technical solutions provided in the present application can also be applied to future communication systems, such as the sixth generation mobile communication system, satellite communication system, etc.

[0015] The electronic device in the embodiment of the present application may also be referred to as a terminal device, terminal, user equipment (UE), user terminal, access terminal, user unit, user station, mobile station, mobile station (MS), mobile terminal (MT), remote terminal, remote station, mobile device, wireless communication device, user agent or user device. The terminal device in the embodiment of the present application may be a device that provides voice and / or data connectivity to a user, and may be used to connect people, objects and machines, such as a handheld device with wireless connection function, a vehicle-mounted device, etc. The terminal device in the embodiment of the present application can be a mobile phone, a tablet computer, a laptop, a PDA, a mobile internet device (MID), a wearable device, a virtual reality (VR) device, an augmented reality (AR) device, a wireless terminal in industrial control, a wireless terminal in self-driving, a wireless terminal in remote medical surgery, a wireless terminal in smart grid, a wireless terminal in transportation safety, a wireless terminal in smart city, a wireless terminal in smart home, etc. Optionally, the UE can be used to act as a base station. For example, the UE can act as a scheduling entity that provides sidelink signals between UEs in V2X or D2D, etc. For example, a cellular phone and a car communicate with each other using a sidelink signal. The cellular phone and the smart home device communicate with each other without relaying the communication signal through the base station.

[0016] The development of electronic devices is changing with each passing day. With the increasing development of communication technology, mobile phones have become the most commonly used communication tool for people. The following is an example of a mobile phone among electronic devices. The current development trend of mobile phones is to become thinner and lighter, the screens of mobile phones are getting bigger, the battery capacity of mobile phones is getting bigger, and the functions that mobile phones need to support are increasing. With the development of mobile phone communications and the popularization of 5G, the frequency band combinations are becoming more and more complex, the number of antennas is increasing, the relative space of antennas is getting smaller, and the electromagnetic environment of mobile phone antennas is becoming more and more complex. Therefore, it is necessary to support more frequency bands in a smaller physical size, and there are many design solutions in the prior art that support multi-frequency antennas.

[0017] For example, in one solution provided by the related art, the antenna is made to resonate in multiple frequency bands by changing the shape of the radiator or other means, thereby realizing a multi-band antenna. In another solution provided by the related art, the antenna structure is composed of a floor, a main branch, a parasitic branch, and a matching circuit. The feed source can transmit a signal to the parasitic branch through current coupling, and the parasitic branch can also couple the received spatial signal to the feed source. By adjusting the physical dimensions of the main branch and the parasitic branch and the matching circuit, an antenna supporting dual frequency bands can be realized.

[0018] With the maturity of 4G LTE technology and the development of 5G NR and 6G technology, it is foreseeable that the space for mobile phone antennas will become increasingly narrow and the electromagnetic environment will become increasingly worse. Currently, antennas supporting multiple frequency bands arranged in a narrow space have the phenomenon that the center frequency of their operating frequency bands deviates from the expected value and the center frequency is unstable, which affects the effective bandwidth and efficiency of the antenna.

[0019] Therefore, it is necessary to design a technical solution for an antenna with a stable center frequency and supporting multiple frequency bands.

[0020] It should be noted that the space for the mobile phone antenna mentioned above will become smaller and smaller, the electromagnetic environment will become worse and worse, and the need to support more frequency bands is only an example. The embodiments of the present application can be applied to any type of scenario where the antenna of an electronic device needs to support multiple frequency bands and the center frequency is unstable.

[0021] Based on this, an embodiment of the present application proposes an antenna assembly. Figure 1 Schematic diagram of a component unit / partial component unit of an antenna assembly provided in an embodiment of the present application. The antenna assembly can be applied to any of the terminal devices described above. Figure 1 The antenna assembly of the embodiment of the present application is described in detail. Figure 1 As shown, the antenna assembly 100 may include: a first branch 110 , a second branch 120 , a matching circuit 130 and an adjustment circuit 140 .

[0022] The first branch 110 includes a feeding point and a first connection point, the feeding point is connected to the feed source 150 through the matching circuit 130, and the first connection point is connected to the ground plane through the adjustment circuit 140. The feed source 150 is used to provide the first branch 110 with an excitation signal to be transmitted, and to process the radio frequency signal received by the first branch 110.

[0023] The second branch 120 is arranged in parallel with the first branch 110, the second branch 120 is not connected to the feed source 150, and the first branch 110 is used to feed the second branch 120 in a coupled manner. The first branch 110 is also called a main radiation branch, and the second branch 120 is also called a parasitic branch.

[0024] The adjustment circuit 140 is used to adjust the center frequency of the working frequency band of the first branch 110 and / or the second branch 120 to obtain a target working frequency band, and the working frequency band of the first branch 110 is different from the working frequency band of the second branch 120. The target working frequency band is a desired working frequency band, which is a frequency band with a predetermined bandwidth at the center frequency point.

[0025] The first branch 110 and the second branch 120 are radiation branches (or radiators). The first branch 110 and the second branch 120 can be made of the same material, which is metal or polymer material, or different materials.

[0026] Among them, the metal material can be a single metal material such as copper or aluminum, or the metal material can be an alloy material, and the alloy material can include a copper alloy material or an aluminum alloy material. The polymer material can include one of the following: polyimide (PI), modified polyimide (MPI), liquid crystal polymer (LCP). The material of the first branch 110 can be the same as or different from the material of the body 160 (middle frame) of the terminal device. The embodiment of the present application does not limit the materials of the first branch 110 and the second branch 120.

[0027] In some embodiments, the first branch 110 may be composed of a metal branch with a slit in the middle frame, one end of the first branch 110 (the end where the first connection point is located) is grounded through the adjustment circuit 140 and connected to the ground plane, and the other end is disconnected from the middle frame.

[0028] In some implementations, the first connection point is located at the first end of the first branch 110, one end of the second branch 120 is disposed opposite to the second end of the first branch 110 and is spaced a predetermined distance apart, and the second end of the first branch 110 is the opposite end of the first end. In some embodiments, a portion of the second branch 120 may overlap a portion of the second end of the first branch 110.

[0029] The matching circuit 130 is connected to the feed source 150 and includes at least one inductor and at least one capacitor. The matching circuit 150 is used to make the working frequency band of the first branch 110 include the first working frequency band and the second working frequency band, and the working frequency band of the second branch 120 is the third working frequency band.

[0030] The matching circuit 130 is used to perform impedance matching on the first branch 110 so that the first branch 110 generates a first resonant mode and a second resonant mode. In some embodiments, the second branch 120 can be connected to the ground plane, and one end of the second branch 120 forms an electrical coupling gap with the second end of the first branch 110, and the second branch 120 is used to generate a third resonant mode. The first resonant mode, the second resonant mode, and the third resonant mode are used to jointly support the transmission and reception of multiple frequency band signals under the excitation of the feed source 150.

[0031] It can be understood that the first resonance mode can correspond to the first operating frequency band, the second resonance mode can correspond to the second operating frequency band, and the third resonance mode can correspond to the third operating frequency band. As an example, the first operating frequency band can be the B28 band (703-803 MHz), the second operating frequency band can be the B8 band (880-960 MHz), and the third operating frequency band can be the 2.4 GHz band (such as WiFi 2.4 GHz, Bluetooth 2.4 GHz). The first branch 110 can generate two resonance modes through the matching circuit 130, and the antenna assembly 100 can support more frequency bands, which helps to reduce the number and cost of antennas and improve the radiation efficiency of the antenna.

[0032] The first working frequency band may not overlap with the third working frequency band. The center frequency corresponding to the first working frequency band may be smaller than the center frequency corresponding to the third frequency band. The second working frequency band may not overlap with the third working frequency band, and the center frequency corresponding to the second working frequency band may be smaller than the center frequency corresponding to the third frequency band.

[0033] In some implementations, the electrical length of the first stub 110 is greater than the electrical length of the second stub 120 .

[0034] In some implementations, the electrical length of the first branch can be determined according to 1 / 4 wavelength of its working frequency band. For example, the electrical length of the first branch can be determined according to 1 / 4 wavelength of the first working frequency band and / or 1 / 4 wavelength of the second working frequency band. The electrical length of the second branch 120 is determined according to 1 / 4 wavelength of the third working frequency band.

[0035] In some implementations, the adjustment circuit 140 may include an inductor, wherein one end of the inductor is connected to the first connection point, and the other end of the inductor is connected to the ground plane.

[0036] The ground plane is also called the ground, ground layer, reference ground, or ground plane. The ground plane can provide a grounding function for the first branch 110 and / or the second branch 120 to ensure the stability and safety of the operation of the first branch 110 and / or the second branch 120. In some embodiments, the ground plane generally refers to a metal plate installed at or near the bottom of the first branch 110. At this time, the ground plane can be called a metal floor, and the metal floor can reuse the main board, small board, middle board (that is, the part of the middle frame of the terminal device except the frame), etc. of the terminal device to reduce the occupied volume. The metal floor can also play a role in reflection and interference suppression, enhancing the reception effect of the first branch 110 by reflecting the signal, suppressing the surrounding electromagnetic interference, and improving the performance of the first branch 110. In other embodiments, the ground plane can be an artificial magnetic conductor (AMC). The in-phase reflection capability of the AMC structure can reduce the cross-sectional height of the antenna, so that the far-field electric field can be superimposed in phase in a limited space, thereby further improving the efficiency of the ground plane.

[0037] The adjustment circuit 140 can be connected to the ground plane through a metal trace, and the second branch 120 can be connected to the ground plane through a metal trace. The metal trace may be a metal sheet or a wire. In some implementations, the metal trace is made by any of the following methods: a flexible printed circuit (FPC), laser printing metal forming, or printing direct structuring (PDS). Among them, laser printing metal forming is also called laser direct structuring (LDS) process, and PDS is also called direct pad printing process.

[0038] In some implementations, the matching circuit 130 includes a switch unit, which is connected to some elements of at least one inductor and at least one capacitor. The switch unit can have multiple states. When the switch unit is in the first state, the first branch 110 generates a first resonance mode, and the first branch 110 is used to transmit and receive radio frequency signals of the first working frequency band; when the switch unit is in the second state, the first branch 110 generates a second resonance mode, and the first branch 110 is used to transmit and receive radio frequency signals of the second working frequency band. The switch unit is used to implement frequency switching between the first working frequency band and the second working frequency band. Since one state of the switch corresponds to one resonance mode, crosstalk between different working frequency bands can be reduced, which helps to improve the radiation efficiency of the antenna.

[0039] In some implementations, the first branch 110 may constitute a T-shaped antenna. In other embodiments, the first branch 110 may constitute a slot antenna or an inverted F antenna (IFA). The T-shaped antenna is a common vertically grounded antenna, which is usually connected to a vertical lower lead in the center of a horizontal conductor and is mostly used for long-wave and medium-wave communications.

[0040] The first branch 110 and the second branch 120 can be used in the same type of communication system or in different types of communication systems. In some implementations, the first branch 110 and the second branch 120 are both used for GPS communication. In other embodiments, the first branch 110 and the second branch 120 can be used in any one of 2G, 3G, 4G, 5G, GPS, WiFi, Bluetooth and other communication systems, respectively. In some embodiments, the first operating frequency band can be the B28 frequency band of the 4G communication system, the second operating frequency band is the B8 frequency band, and the third operating frequency band is the 2.4 GHz frequency band.

[0041] In the embodiment of the present application, the first branch can feed the second branch in a coupled manner, the first connection point of the first branch is connected to the ground plane through an adjustment circuit, and the adjustment circuit can adjust the center frequency of the working frequency band of the first branch and / or the second branch to obtain the target working frequency band. The embodiment of the present application helps the antenna assembly obtain a stable center frequency of the working frequency band and improves the efficiency of the antenna.

[0042] The antenna assembly of the embodiment of the present application is further described below in combination with some possible implementation methods of the embodiment of the present application.

[0043] Figure 2 yes Figure 1 A schematic diagram of a possible implementation of an antenna assembly. Taking a mobile phone used in a terminal device as an example, combined with Figure 2 The antenna assembly of the embodiment of the present application is exemplarily introduced. Figure 2 In the embodiment of FIG. 1 , the first branch is used for cellular mobile communication and the second branch is used for WiFi communication. Figure 2 As shown, the antenna assembly 200 may include: a first branch 110 , a second branch 120 , a matching circuit 230 and an adjustment circuit 240 .

[0044] The first branch 110 includes a feeding point and a first connection point. The feeding point is connected to the feed source 150 through the matching circuit 230, and the first connection point is connected to the ground plane through the adjustment circuit 140. The first branch 110 may constitute a T-shaped antenna.

[0045] The second branch 120 is arranged in parallel with the first branch 110, the second branch 120 is not connected to the feed source 150, and the first branch 110 feeds the second branch 120 in a coupled manner. The first connection point is located at the first end of the first branch 110, one end of the second branch 120 is arranged opposite to the second end of the first branch 110 and is spaced a predetermined distance apart, and the second end of the first branch 110 is the opposite end of the first end.

[0046] The adjustment circuit 240 may include a first inductor L1, one end of which is connected to the first connection point, and the other end of the first inductor L1 is connected to the ground plane. The inductance value of the first inductor L1 can be set according to demand, and the embodiment of the present application does not specifically limit this. Since the inductor is directly connected to the radiator of the first branch 110, it is also called an aperture loading inductor. The adjustment circuit 240 is used to adjust the center frequency of the working frequency band of the first branch 110 and / or the second branch 120 to obtain a target working frequency band, and the working frequency band of the first branch 110 is different from the working frequency band of the second branch 120. The target working frequency band is the desired working frequency band, which is a frequency band with a certain bandwidth at the center frequency. For example, the first inductor L1 can be used to adjust the third resonant mode to adjust the center frequency of the third working frequency band corresponding to the third resonant mode.

[0047] The matching circuit 230 is connected to the feed source 150 and includes at least one inductor and at least one capacitor. The matching circuit 230 is used to make the working frequency band of the first branch 110 include the first working frequency band and the second working frequency band, and the working frequency band of the second branch 120 is the third working frequency band.

[0048] like Figure 2 As shown, the matching circuit 230 may include a first capacitor C1, a second capacitor C2, a third capacitor C3, a second inductor L2, a third inductor L3 and a fourth inductor L4. One end of the first capacitor C1 is connected to the feed source, the other end of the first capacitor C1 is grounded, one end of the second capacitor C2 is connected to the feed source, the other end of the second capacitor C2 is connected to one end of the third capacitor C3, one end of the second inductor L2 is connected to the other end of the second capacitor C2, the other end of the second inductor L2 is grounded, one end of the third inductor L3 is connected to the other end of the third capacitor C3, the other end of the third inductor L3 is grounded, the other end of the third capacitor C3 is connected to one end of the fourth inductor L4, and the other end of the fourth inductor L4 is connected to the feed point. It should be understood that the capacitance value of the above-mentioned capacitor and the inductance value of the inductor can be set according to demand, and the embodiment of the present application does not specifically limit this.

[0049] It should be noted that after setting the matching circuit 230, the first branch 110 can generate two resonance modes (i.e., form dual waves). More specifically, in the matching circuit 230, by setting the second inductor L2 and the third capacitor C3, the first branch 110 can generate two resonance modes, i.e., the first resonance mode and the second resonance mode. The characteristics of the antenna can be adjusted by the first capacitor C1, the second capacitor C2, the third inductor L3, and the fourth inductor L4, so as to obtain appropriate performance.

[0050] In some implementations, the electrical length of the first branch can be determined according to 1 / 4 wavelength of its working frequency band. For example, the electrical length of the first branch can be determined according to 1 / 4 wavelength of the first working frequency band and / or the second working frequency band. The electrical length of the second branch 120 is determined according to 1 / 4 wavelength of the third working frequency band.

[0051] The first working frequency band of the first branch 110 may be a B28 frequency band, the second working frequency band may be a B8 frequency band, and the third working frequency band of the second branch 120 may be a WiFi 2.4 GHz frequency band.

[0052] Figure 3 yes Figure 2 The schematic diagram of the return loss when the first branch 110 is not connected to the adjustment circuit is shown in FIG. Figure 3 FIG. 1 is a schematic diagram of the return loss of the first branch in the prior art. Figure 3 As shown, when the aperture of the first branch 110 is not loaded with inductance (i.e., the adjustment circuit is not connected), the first branch 110 and the second branch 120 operate in the λ / 4 current mode. It can be seen that there are three resonant frequencies, but the resonant frequencies deviate from the center frequency of the target operating frequency band, where λ is the wavelength corresponding to the operating frequency band. Figure 4 yes Figure 2 Schematic diagram of return loss when the first branch 110 is connected to the adjustment circuit 240. The first branch 110 can be adjusted to the center frequency of the target working frequency band by loading the first inductor L1. Figure 4 As shown, for example, point 1 is the center frequency of the first working frequency band (0.75GHz), the corresponding target working frequency band is the B28 frequency band, and the return loss coefficient S11 at point 1 is about -8.89dB. For another example, point 3 is the center frequency of the third working frequency band (2.4595GHz), the corresponding target working frequency band is the WiFi2.4G frequency band, and the return loss coefficient S11 at point 3 is about -17dB, with less loss and good performance. Figure 5 yes Figure 2 Schematic diagram of the efficiency of the antenna assembly. Figure 5As shown in the figure, it can be seen that there are obvious efficiency peaks in the B8 / B28 and WiFi 2.4 GHz bands. Near the WiFi 2.4 GHz band, the difference between the radiation efficiency of the antenna component and the total efficiency of the system is small. Near the 2.4 GHz frequency point, the radiation efficiency of the antenna component is greater than -6 dB, and the performance is good.

[0053] In the embodiment of the present application, the first branch can feed the second branch in a coupled manner, the first connection point of the first branch is connected to the ground plane through an adjustment circuit, and the adjustment circuit can adjust the center frequency of the working frequency band of the first branch and / or the second branch to obtain the target working frequency band. The embodiment of the present application helps the antenna assembly obtain a stable center frequency of the working frequency band and improves the antenna efficiency.

[0054] Figure 6 Schematic diagram of component units / partial component units of a terminal device provided in an embodiment of the present application. Figure 6 As shown, the terminal device 600 may include an antenna assembly 610 as described above.

[0055] The antenna assembly 610 includes: a first branch, including a feeding point and a first connection point, the feeding point is connected to the feed source through a matching circuit, and the first connection point is connected to the ground plane through an adjustment circuit; a second branch is arranged in parallel with the first branch, the second branch is not connected to the feed source, and the first branch is used to feed the second branch in a coupled manner; the adjustment circuit is used to adjust the center frequency of the working frequency band of the first branch and / or the second branch to obtain the target working frequency band, and the working frequency band of the first branch is different from the working frequency band of the second branch.

[0056] Optionally, the matching circuit includes at least one inductor and at least one capacitor, and the matching circuit is used to make the working frequency band of the first branch include the first working frequency band and the second working frequency band, and the working frequency band of the second branch is the third working frequency band.

[0057] Optionally, the electrical length of the first branch is greater than the electrical length of the second branch.

[0058] Optionally, the electrical length of the first branch is determined according to 1 / 4 wavelength of its working frequency band, and the electrical length of the second branch is determined according to 1 / 4 wavelength of the third working frequency band.

[0059] Optionally, the matching circuit includes: a switching unit, connected to some elements of at least one inductor and at least one capacitor, when the switching unit is in a first state, the first branch is used to send and receive communication signals in a first working frequency band, and when the switching unit is in a second state, the first branch is used to send and receive communication signals in a second working frequency band.

[0060] Optionally, the adjustment circuit includes an inductor, one end of the inductor is connected to the first connection point, and the other end of the inductor is connected to the ground plane.

[0061] Optionally, the first connection point is located at the first end of the first branch, one end of the second branch is arranged opposite to the second end of the first branch and is spaced a predetermined distance apart, and the second end is the opposite end of the first end.

[0062] Optionally, the first branch constitutes a T-type antenna.

[0063] Optionally, the first working frequency band is a B28 frequency band, the second working frequency band is a B8 frequency band, and the third working frequency band is a 2.4 GHz frequency band.

[0064] In the above embodiments, it can be implemented in whole or in part by software, hardware, firmware or any other combination. When implemented by software, it can be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer instructions. When the computer program instructions are loaded and executed on a computer, the process or function described in the embodiment of the present disclosure is generated in whole or in part. The computer can be a general-purpose computer, a special-purpose computer, a computer network, or other programmable device. The computer instructions can be stored in a machine-readable storage medium, or transmitted from one machine-readable storage medium to another machine-readable storage medium. For example, the computer instructions can be transmitted from a website site, computer, server or data center by wired (e.g., coaxial cable, optical fiber, digital subscriber line (digital subscriber line, DSL)) or wireless (e.g., infrared, wireless, microwave, etc.) mode to another website site, computer, server or data center. The machine-readable storage medium can be any available medium that can be accessed by a computer or a data storage device such as a server or data center that includes one or more available media integrated. The available medium may be a magnetic medium (eg, a floppy disk, a hard disk, a magnetic tape), an optical medium (eg, a digital video disc (DVD)), or a semiconductor medium (eg, a solid state disk (SSD)).

[0065] Those of ordinary skill in the art will appreciate that the units and algorithm steps of each example described in conjunction with the embodiments of the present disclosure can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. Professional and technical personnel can use different methods to implement the described functions for each specific application, but such implementation should not be considered to be beyond the scope of the present disclosure.

[0066] It should be understood that in the various embodiments of the present application, "first", "second", etc. are used to distinguish different objects rather than to describe a specific order. The size of the serial numbers of the above-mentioned processes does not mean the order of execution. 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 embodiments of the present application.

[0067] In the several embodiments provided in the present disclosure, it should be understood that the disclosed systems, devices and methods can be implemented in other ways. For example, 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 integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, indirect coupling or communication connection of devices or units, which can be electrical, mechanical or other forms.

[0068] In several embodiments provided in the present application, it should be understood that when a certain part is said to be "connected" or "connected" to another part, it means that the part can not only be "directly connected" but also "electrically connected" with another element intervening therebetween. In addition, the term "connected" also means that the part is "physically connected" and "wirelessly connected". In addition, when a certain part is said to "include" a certain element, unless otherwise stated, it means that the certain part can include another element, rather than excluding the other element.

[0069] The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, 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 solution of this embodiment.

[0070] In addition, each functional unit in each embodiment of the present disclosure may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit.

[0071] The above is only a specific embodiment of the present disclosure, but the protection scope of the present disclosure is not limited thereto. Any person skilled in the art who is familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed in the present disclosure, which should be included in the protection scope of the present disclosure. Therefore, the protection scope of the present disclosure should be based on the protection scope of the claims.

Claims

1. An antenna assembly, characterized in that: include: A first branch, comprising a feeding point and a first connection point, wherein the feeding point is connected to a feed source through a matching circuit, and the first connection point is connected to a ground plane through an adjustment circuit; A second branch node is arranged in parallel with the first branch node, the second branch node is not connected to the feed source, and the first branch node is used to feed the second branch node in a coupled manner; The adjustment circuit is used to adjust the central frequency point of the working frequency band of the first branch and / or the second branch to obtain a target working frequency band, and the working frequency band of the first branch is different from the working frequency band of the second branch.

2. The antenna assembly according to claim 1, characterized in that: The matching circuit includes at least one inductor and at least one capacitor, and the matching circuit is used to make the working frequency band of the first branch include the first working frequency band and the second working frequency band, and the working frequency band of the second branch is the third working frequency band.

3. The antenna assembly according to claim 2, characterized in that: The electrical length of the first branch is greater than the electrical length of the second branch.

4. The antenna assembly according to claim 3, characterized in that: The electrical length of the first branch is determined according to 1 / 4 wavelength of its working frequency band, and the electrical length of the second branch is determined according to 1 / 4 wavelength of the third working frequency band.

5. The antenna assembly according to claim 2, characterized in that: The matching circuit comprises: A switch unit is connected to some elements of the at least one inductor and the at least one capacitor. When the switch unit is in a first state, the first branch is used to send and receive radio frequency signals in the first working frequency band. When the switch unit is in a second state, the first branch is used to send and receive radio frequency signals in the second working frequency band.

6. The antenna assembly according to any one of claims 1 to 5, characterized in that: The adjustment circuit includes an inductor, one end of the inductor is connected to the first connection point, and the other end of the inductor is connected to the ground plane.

7. The antenna assembly according to any one of claims 1 to 5, characterized in that: The first connection point is located at the first end of the first branch, one end of the second branch is arranged opposite to the second end of the first branch and is spaced a predetermined distance apart, and the second end is the opposite end of the first end.

8. The antenna assembly according to any one of claims 1 to 5, characterized in that: The first branches form a T-shaped antenna.

9. The antenna assembly according to any one of claims 2 to 5, characterized in that: The first working frequency band is the B28 frequency band, the second working frequency band is the B8 frequency band, and the third working frequency band is the 2.4 GHz frequency band.

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

Images