Antenna assembly and electronic equipment

Abstract

The invention provides an antenna assembly and electronic equipment. The antenna assembly comprises a radiation branch knot which comprises a feeding point located at the center of the radiation branch knot, a first grounding point located at the first end of the radiation branch knot and a second grounding point located at the opposite end of the first end, and the radiation branch knot is in mirror symmetry about the feeding point; the first grounding point and the second grounding point are respectively connected with a public ground; the feeding point is connected with a feed source through the first matching circuit, and the first matching circuit is a capacitive matching circuit; the radiation branch knot has at least three different resonance modes, and the at least three resonance modes correspond to a plurality of resonance frequency points. According to the embodiment of the invention, the complexity of the antenna assembly is reduced, the development cost of the antenna is reduced, the introduced device loss is reduced, and the efficiency of an antenna system 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 an electronic 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, requiring antenna components to support multiple frequency bands. Currently, antennas supporting three frequency bands arranged in a small space have problems of complex structure or high cost. Summary of the invention

[0003] The embodiments of the present application provide an antenna assembly and an electronic 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 radiating branch, comprising a feeding point located at the center of the radiating branch, a first grounding point located at a first end of the radiating branch, and a second grounding point located at an opposite end of the first end, the radiating branch being mirror-symmetrical about the feeding point, the first grounding point and the second grounding point being respectively connected to a common ground; a first matching circuit, the feeding point being connected to a feed source via the first matching circuit, the first matching circuit being a capacitive matching circuit; the radiating branch having at least three different resonance modes, the at least three resonance modes corresponding to a plurality of resonance frequencies.

[0005] In a second aspect, an electronic device is provided, comprising a radio frequency transceiver chip and the antenna assembly as described in the first aspect.

[0006] The radiating branch in the embodiment of the present application has a single feeding point and two grounding points, and the radiating branch body and the two grounding points are mirror-symmetrical about the feeding point, and there is no need to set up parasitic branches and switching elements. The capacitive matching circuit connected to the feed source can make the radiating branch produce at least three resonant modes, and can support multiple operating frequency bands. The embodiment of the present application does not need to use parasitic branches, which can ensure the integrity of the antenna structure, and has a simple structure, which helps to reduce the complexity of the antenna assembly, reduce the development cost of the antenna, reduce the introduced device loss, and improve the efficiency of the antenna system. 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 an antenna assembly.

[0009] Figure 3 yes Figure 1 Schematic diagram of a possible return loss.

[0010] Figure 4a yes Figure 1 Schematic diagram of the current in the radiation branch in the first resonant mode.

[0011] Figure 4b yes Figure 1 Schematic diagram of current simulation of the radiation branch in the first resonant mode.

[0012] Figure 5a yes Figure 1 Schematic diagram of the current in the radiation branch in the second resonant mode.

[0013] Figure 5b yes Figure 1 Schematic diagram of current simulation of the radiation branch in the second resonant mode.

[0014] Figure 6a yes Figure 1 Schematic diagram of the current in the radiation branch in the third resonant mode.

[0015] Figure 6b yes Figure 1 Schematic diagram of current simulation of the radiation branch in the third resonant mode.

[0016] Figure 7 yes Figure 1 Schematic diagram of one possible radiation efficiency of an antenna assembly.

[0017] Figure 8 yes Figure 1 A schematic diagram of another possible implementation of an antenna assembly.

[0018] Fig. 9 yes Figure 8 Schematic diagram of the simulation of the return loss and efficiency of the antenna assembly.

[0019] Fig.10 It is a schematic diagram of a component unit / partial component unit of an electronic device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0020] 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.

[0021] 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.

[0022] 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.

[0023] Electronic devices are developing rapidly. With the 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, with larger screens and larger battery capacities, and more and more functions that mobile phones need to support. With the development of mobile communications and the popularization of 5G, the frequency band combinations are becoming more and more complex, the number of antennas is increasing, and the relative space for antennas is getting smaller and smaller. 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.

[0024] For example, in a mobile phone antenna solution for realizing three resonant frequencies provided by the related art, an inverted F antenna (IFA) / composite right / left-handed (CRLH) + parasitic branch solution is adopted. The feed source can transmit signals to the parasitic branches through current coupling, and the parasitic branches can also couple the received spatial signals to the feed source. However, the structure of the parasitic branch antenna solution is usually more complicated. In another mobile phone antenna solution for realizing three resonant frequencies provided by the related art, a switching device is introduced, and three resonant frequencies are obtained by switching the path inductance tuning. However, the solution of introducing the switching device will introduce additional device losses and increase the development cost of the antenna.

[0025] It can be seen that the antenna solutions supporting three resonant frequencies in the prior art have problems such as complex structure or additional device loss and high development cost.

[0026] Therefore, it is necessary to design an antenna technology solution that is simple in structure, low in cost and supports multiple frequency bands.

[0027] 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 electronic 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 radiation branch 110 and a first matching circuit 120 .

[0028] The radiation branch 110 includes a feeding point A at the center, a first grounding point B at the first end, and a second grounding point C at the opposite end of the first end. The radiation branch 110 is mirror-symmetrical about the feeding point A, and the first grounding point B and the second grounding point C are respectively connected to the common ground. The first end can be any of the two end points of the radiation branch 110, that is, the first grounding point B is any of the two end points. The radiation branch is also called a radiator, and the grounding point is also called a return point.

[0029] The common ground is also called the reference ground, ground plane, ground, ground layer, ground plane. The ground plane can provide the grounding function for the radiation branch 110 to ensure the stability and safety of the radiation branch 110. In some embodiments, the ground plane generally refers to a metal plate installed at or near the bottom of the radiation 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.

[0030] The feed point A is connected to the feed source 130 via the first matching circuit 120 , which is a capacitive matching circuit. The feed source 130 is used to provide the radiation branch 110 with an excitation signal to be transmitted, and to process the radio frequency signal received by the radiation branch 110 .

[0031] The radiation branch 110 has at least three different resonance modes, and the at least three resonance modes correspond to a plurality of resonance frequency points.

[0032] The material of the radiation branch 110 can be a metal material or a polymer material. 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 radiation branch 110 can be the same as or different from the material of the body (middle frame) of the terminal device. The embodiment of the present application does not limit the material of the radiation branch 110.

[0033] In some embodiments, the radiating branch 110 can be composed of a metal branch with a slit in the middle frame. Both ends of the radiating branch 110 (the ends where the first grounding point and the second grounding point are located) are grounded or grounded through an adjustment circuit and connected to the ground plane, and the middle feeding point is connected to the feed source.

[0034] The first matching circuit 120 is a capacitive matching circuit. In some embodiments, the first matching circuit 120 may include a plurality of capacitive elements connected in series. The first matching circuit 130 is used to adjust and impedance match the radiation branch 110 so that the radiation branch 110 has at least three different resonance modes.

[0035] The antenna assembly 100 has a target operating frequency band, which is a desired operating frequency band and a frequency band with a predetermined bandwidth at a center frequency point.

[0036] In some implementations, the three resonance modes may include a first resonance mode, a second resonance mode, and a third resonance mode. The first resonance mode is a composite left-right-hand mode from the first ground point B to the feed point A excited by the feed source 130, and the first resonance mode corresponds to the first resonance frequency. Since the radiation branch 110 is mirror-symmetric about the feed point A, the first resonance mode is also a composite left-right-hand mode from the second ground point C to the feed point A excited by the feed source 130. The second resonance mode is a 1 / 2 wavelength loop mode from the first ground point B to the feed point A excited by the feed source 130, and the second resonance mode corresponds to the second resonance frequency. The second resonance mode is also a 1 / 2 wavelength loop mode from the second ground point C to the feed point A excited by the feed source 130. The third resonance mode is a 1 / 4 wavelength mode from the feed point A to the first ground point B excited by the feed source 130, and the third resonance mode corresponds to the third resonance frequency. The third resonance mode is a 1 / 4 wavelength mode from the feed point A to the second ground point C excited by the feed source 130.

[0037] The radiation branch 110 can be used in any of the communication systems such as 2G, 3G, 4G, 5G, GPS, WiFi, Bluetooth, etc. The first resonance mode, the second resonance mode and the third resonance mode are used to jointly support the reception and transmission of multiple frequency band signals under the excitation of the feed source 130. It can be understood that the first resonance mode can correspond to the first working frequency band, the second resonance mode corresponds to the second working frequency band, and the third resonance mode can correspond to the third working frequency band. The first resonance frequency point corresponding to the first working frequency band can be less than the second resonance frequency point corresponding to the second working frequency band, and the second resonance frequency point corresponding to the second working frequency band can be less than the third resonance frequency point corresponding to the third working frequency band.

[0038] As an example, the first working frequency band may be the GPS L1 frequency band (1575.42 MHz), the second working frequency band may be the N77 / N78 frequency band (3.3-4.2 GHz), and the third working frequency band may be the WiFi 5 GHz frequency band (5.15-5.875 GHz). In other embodiments, the first working frequency band may be the B28 frequency band of the 4G communication system, the second working frequency band may be the B8 frequency band, and the third working frequency band may be the 2.4 GHz frequency band.

[0039] In some implementations, the radiation branch 110 may be a linear structure. This antenna structure is simple and easy to implement.

[0040] In some implementations, the radiating branch 110 may include two parts, specifically including: a first branch and a second branch that is mirror-symmetrical to the first branch about the feeding point, and the first branch and the second branch are set according to a preset angle. The first branch may be referred to as the first section or the first part of the radiating branch 110, and the second branch may be referred to as the second section or the second part of the radiating branch 110. The junction (or boundary) between the first branch and the second branch is the location of the feeding point. The longitudinal current flowing through the first branch is greater than the longitudinal current flowing through the second branch, and the transverse current flowing through the first branch is less than the transverse current flowing through the second branch.

[0041] In some implementations, the preset angle between the first branch and the second branch can be 90 degrees, which is convenient for arrangement at the top corner of the electronic device, and helps to have good horizontal radiation function and vertical RF radiation function. Usually in the application scenario of mobile phone antenna, exciting the longitudinal current mode can obtain higher radiation efficiency, such as using GPS communication.

[0042] In some implementations, the antenna assembly is applied to an electronic device, the radiating branch is located at a first vertex angle of the electronic device, the first branch is parallel to a first side edge constituting the first vertex angle, the second branch is parallel to a second side edge constituting the first vertex angle, the first vertex angle is any vertex angle of multiple vertex angles of the electronic device, and the second side edges are perpendicular to each other.

[0043] In some implementations, the first ground point B is connected to the common ground through a second matching circuit, and / or the second ground point C is connected to the common ground through a third matching circuit. The second matching circuit can be connected to the ground plane through a metal trace, and the radiation branch 110 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: flexible printed circuit (FPC), laser printing metal forming, 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.

[0044] The radiating branch in the embodiment of the present application has a single feeding point and two grounding points, and the radiating branch body and the two grounding points are mirror-symmetrical about the feeding point, and there is no need to set up parasitic branches and switching elements. Through the capacitive matching circuit connected to the feed source, the radiating branch can generate at least three resonant modes and support multiple operating frequency bands. The embodiment of the present application does not need to use parasitic branches, which can ensure the integrity of the antenna structure, has a simple structure, helps to reduce the complexity of the antenna assembly, does not need to set up switching elements, helps to reduce the development cost of the antenna, reduces the introduced device loss, and improves the efficiency of the antenna system.

[0045] 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.

[0046] Figure 2 yes Figure 1 A schematic diagram of a possible implementation of an antenna assembly. Figure 2 As shown, the antenna assembly 200 may include: a radiation branch 110 , a first matching circuit 120 , a second matching circuit 140 and a third matching circuit 150 .

[0047] The radiation branch 110 includes a feeding point A at a central position, a first grounding point B at a first end, and a second grounding point C at an end opposite to the first end, and the radiation branch 110 is mirror-symmetrical about the feeding point A. The first grounding point B is connected to the common ground through the second matching circuit 140, and the second grounding point C is connected to the common ground through the third matching circuit 150.

[0048] The first matching circuit 120 is connected to the feed source 130, and the feed point A is connected to the feed source 130 through the first matching circuit 120. The first matching circuit 120 is a capacitive matching circuit. The first matching circuit 120 may include a plurality of capacitive elements connected in series. By adjusting the capacitance value of the first matching circuit 120, the radiation branch 110 has three resonance modes. In other words, the first matching circuit 120 is used to make the working frequency band of the radiation branch 110 include the first working frequency band, the second working frequency band and the third working frequency band.

[0049] The second matching circuit 140 and the third matching circuit 150 are used to adjust the impedance of the radiation branch 110 and the center frequency of the working frequency band to obtain the target working frequency band. For example, the second matching circuit 140 can be used to adjust the third resonance mode to adjust the center frequency of the third working frequency band corresponding to the third resonance mode.

[0050] In some embodiments, the second matching circuit 140 may be a circuit composed of an inductor and a capacitor in any combination. It should be understood that the capacitance value of the capacitor and the inductance value of the inductor may be set according to requirements, and the embodiment of the present application does not specifically limit this.

[0051] Embodiments of the present application Figure 2 The proposed three-band antenna assembly is a single feed point and dual ground point solution. The radiation branch of this solution is a symmetrical structure, with the feed point A as the center position, and the two ground points B and C are mirror-symmetrical about its center A. Feed point A is connected to the feed source through the first matching circuit 120, and the ground points B and C are grounded through the second matching circuit 140 and the third matching circuit 150 respectively. The antenna assembly can cover the three frequency bands of GPS L1+N77 / 78+WIFI 5G. It should be understood that GPS L1+N77 / 78+WIFI 5G refers to three independent frequency bands supported by the specific form of the selected matching circuit. According to the different capacitance values ​​and inductance values ​​set in the matching circuit, the ranges of the specific three frequency bands are different. The embodiment of the present application proposes an antenna form that can excite three resonant modes without using switching elements and parasitic branches. By adjusting the selected matching circuit, other three frequency bands or more frequency band combinations can be supported. The embodiment of the present application does not require the use of parasitic branches, which can ensure the integrity of the antenna structure and has a simple structure, which helps to reduce the complexity of the antenna component, reduce the development cost of the antenna, reduce the introduced device loss, and improve the efficiency of the antenna system.

[0052] Figure 3 yes Figure 1 A possible return loss diagram of an antenna assembly. Figure 3 As shown, it can be seen that there are three resonant frequency points, which can cover the three frequency bands of GPS L1+N77 / 78+WIFI 5G. For example, point 1 is the first resonant frequency point, its frequency is 1.57GHz, the corresponding target working frequency band is the GPS L1 frequency band, and the return loss coefficient S11 at point 1 is about -11.764dB. For another example, point 2 is the second resonant frequency point, its frequency is 3.39GHz, the corresponding target working frequency band is the N77 / N78 frequency band, and the return loss coefficient S11 at point 2 is about -6.594dB. For another example, point 3 is the third resonant frequency point, its frequency is 5.57GHz, and the corresponding target working frequency band is the WiFi 5GHz frequency band. The return loss coefficient S11 at point 3 is about -6.252dB, the return loss is small, and the antenna performance is good.

[0053] Since the radiation branch structure of the embodiment of the present application is completely symmetrical about the feeding point, the current distribution (including amplitude and phase) on the two arms centered at the feeding point is mirror-symmetrical. The three resonance modes of the embodiment of the present application are described in detail below.

[0054] Figure 4a yes Figure 1 Schematic diagram of the current in the radiation branch of the first resonance mode. Figure 4aAs shown, the composite right-left-handed (CRLH) radiation pattern from ground point B to feed point A is excited by capacitive feed. Also, the CRLH radiation pattern from ground point C to feed point A is excited by capacitive feed. Figure 4b yes Figure 1 Schematic diagram of current simulation of the radiation branch in the first resonance mode. In the first resonance mode, the resonance frequency is 1.57 GHz, the current amplitude on the radiation branch 110 changes slightly, and there is no reverse current.

[0055] Figure 5a yes Figure 1 Schematic diagram of the current in the radiation branch of the second resonance mode. Figure 5a As shown in the figure, the feed source excites a 1 / 2 wavelength ring mode from ground point B to feed point A, and there is a current reversal point (current zero point) between ground point B and feed point A. It is also a 1 / 2 wavelength ring mode from ground point C to feed point A, and there is a current reversal point (current zero point) between ground point C and feed point A. Figure 5b yes Figure 1 Schematic diagram of current simulation of the radiation branch in the second resonance mode. In the second resonance mode, the resonance frequency is 3.4GHz, there is a current reversal point (current zero point) between the grounding point B and the feeding point A, and there is a current reversal point (current zero point) between the grounding point C and the feeding point A.

[0056] Figure 6a yes Figure 1 Schematic diagram of the current of the radiation branch in the third resonance mode. Figure 6a As shown, in the third resonance mode, the resonance frequency is 5.5GHz, and the feed source excites a 1 / 4 wavelength mode from the feed point A to the ground point B. The feed point A is the current zero point, and the ground point B is the current strong point, which is a 1 / 4 wavelength period from the current minimum value (point A) to the current maximum value (point B). It is also a 1 / 4 wavelength mode from the feed point A to the ground point C. The feed point A is the current zero point, and the ground point C is the current strong point, which is a 1 / 4 wavelength period from the current minimum value (point A) to the current maximum value (point C). Figure 6b yes Figure 1 Schematic diagram of current simulation of the radiation branch in the third resonance mode. In the third resonance mode, the resonant frequency is 5.5GHz, the feeding point A is the current zero point, the grounding point B is the current strong point, which is a 1 / 4 wavelength period from the minimum current value (point A) to the maximum current value (point B). The feeding point A is the current zero point, and the grounding point C is the current strong point, which is also a 1 / 4 wavelength period from the minimum current value (point A) to the maximum current value (point C).

[0057] Figure 7 yes Figure 1 A possible efficiency diagram of the antenna assembly. Figure 7 As shown, it can be seen that there are obvious efficiency peaks in the GPS L1, N77, and WIFI 5G bands. Near the GPS L1 band, the difference between the radiation efficiency of the antenna assembly and the total efficiency of the system is small. Near the three resonant frequencies, the radiation efficiency of the antenna assembly is greater than -3dB, and the performance is good. The three-resonant frequency solution proposed in the embodiment of the present application can have higher radiation efficiency and total efficiency in a more complex whole machine environment and with very little clearance.

[0058] In the embodiment of the present application, the radiating branch has a single feeding point and two grounding points, and the radiating branch body and the two grounding points are mirror-symmetrical about the feeding point, and there is no need to set up parasitic branches and switching elements. Through the capacitive matching circuit connected to the feed source, the radiating branch can generate at least three resonant modes and support multiple operating frequency bands. The embodiment of the present application does not need to use parasitic branches, which can ensure the integrity of the antenna structure, has a simple structure, helps to reduce the complexity of the antenna assembly, does not need to set up switching elements, helps to reduce the development cost of the antenna, reduces the introduced device loss, and improves the efficiency of the antenna system.

[0059] Figure 8 yes Figure 1 A schematic diagram of another possible implementation of the antenna assembly. Figure 8 As shown, the antenna assembly 800 may include: a radiation branch 110 , a second matching circuit 140 and a third matching circuit 150 .

[0060] The radiation branch 110 may include a first branch 111 and a second branch 112, and the second branch 112 is mirror-symmetrical with the first branch 111 about the feeding point A. The first branch 111 and the second branch 112 are arranged according to a preset angle, and the preset angle is 90 degrees, which is convenient for arrangement at the top corner of the electronic device. The first branch 111 is also called the first section or the first part of the radiation branch 110, and the second branch 112 is also called the second section or the second part. The junction (or boundary) between the first branch and the second branch is the location where the feeding point A is located.

[0061] The first grounding point B is located at one end of the first branch 111, and the second grounding point C is located at one end of the second branch 112. The first grounding point B and the second grounding point C are mirror-symmetrical about the feeding point A. The first grounding point B is connected to the common ground through the second matching circuit 140, and the second grounding point C is connected to the common ground through the third matching circuit 150.

[0062] The longitudinal current flowing through the first branch 111 is different from the longitudinal current flowing through the second branch 112. Figure 8In the position shown, when the electronic device is placed vertically, the longitudinal current flowing through the first branch 111 is greater than the longitudinal current flowing through the second branch 112, and the transverse current flowing through the first branch is less than the transverse current flowing through the second branch.

[0063] The antenna assembly is applied to an electronic device, and the radiation branch 110 can be located at the first vertex of the electronic device, such as the upper left corner. The first branch 111 is parallel to the first side edge constituting the first vertex, and the second branch 112 is parallel to the second side edge (i.e., the top edge) constituting the first vertex, and the second side edges are perpendicular to each other.

[0064] The second matching circuit 140 and the third matching circuit 150 are used to adjust the impedance of the radiation branch 110 and the center frequency of the working frequency band to obtain the target working frequency band.

[0065] Fig. 9 yes Figure 8 Schematic diagram of the simulation of the return loss and efficiency of the antenna component. Fig. 9 As shown, it can be seen that the antenna form can simultaneously excite three resonant modes with three resonant frequencies, corresponding to GPS L1, N77 / N78, and WIFI5G bands. At the three resonant frequencies, the return loss is small and the radiation efficiency is high, all greater than -2dB.

[0066] In an embodiment of the present application, the two sections of the radiating branch are arranged at right angles and are mirror-symmetrical about the feeding point A. Due to the difference in the position of the radiating branch, the longitudinal and transverse current modes excited on the floor are different. Usually in the application scenario of mobile phone antennas, exciting the longitudinal current mode can obtain higher radiation efficiency, such as helping to improve the communication quality of GPS communication. The embodiment of the present application helps to improve the horizontal RF radiation function and the vertical RF radiation function of the antenna. The embodiment of the present application does not need to adopt parasitic branches, which can ensure the integrity of the antenna structure. The structure is simple, which helps to reduce the complexity of the antenna assembly. There is no need to set a switching element, which helps to reduce the development cost of the antenna, reduce the introduced device loss, and improve the efficiency of the antenna system.

[0067] Fig.10 Schematic diagram of a component unit / partial component unit of an electronic device provided in an embodiment of the present application. Fig.10 As shown, the electronic device 1000 may include an antenna assembly 1010 and a radio frequency transceiver chip 1020 as described above.

[0068] The antenna assembly 1010 includes: a radiating branch, including a feeding point located at the center of the radiating branch, a first grounding point located at the first end of the radiating branch, and a second grounding point located at the opposite end of the first end, the radiating branch is mirror-symmetrical about the feeding point, and the first grounding point and the second grounding point are respectively connected to a common ground; a first matching circuit, the feeding point is connected to a feed source through the first matching circuit, and the first matching circuit is a capacitive matching circuit; the radiating branch has at least three different resonance modes, and the at least three resonance modes correspond to multiple resonance frequencies.

[0069] The RF transceiver chip 1020 is used to provide the antenna assembly 1010 with wireless RF signals to be transmitted, and to demodulate the wireless RF signals received by the antenna assembly 1010 .

[0070] Optionally, at least three resonance modes include a first resonance mode, a second resonance mode and a third resonance mode, the first resonance mode is a composite left-hand and right-hand mode from the first grounding point to the feeding point, and the first resonance mode corresponds to the first resonance frequency; the second resonance mode is a 1 / 2 wavelength ring mode from the first grounding point to the feeding point, and the second resonance mode corresponds to the second resonance frequency; the third resonance mode is a 1 / 4 wavelength mode from the feeding point to the first grounding point, and the third resonance mode corresponds to the third resonance frequency.

[0071] Optionally, the radiating branches are in a linear structural form.

[0072] Optionally, the radiating branches include: a first branch; a second branch that is mirror-symmetrical to the first branch about a feeding point, and the first branch and the second branch are arranged according to a preset angle; the longitudinal current flowing through the first branch is greater than the longitudinal current flowing through the second branch, and the transverse current flowing through the first branch is less than the transverse current flowing through the second branch.

[0073] Optionally, the preset angle is 90 degrees.

[0074] Optionally, the radiation branch is located at a first vertex angle of the electronic device, the first branch is parallel to a first side edge constituting the first vertex angle, the second branch is parallel to a second side edge constituting the first vertex angle, and the second side edges are perpendicular to each other.

[0075] Optionally, the first matching circuit includes a plurality of capacitive elements connected in series.

[0076] Optionally, the first grounding point is connected to the common ground through a second matching circuit, and / or the second grounding point is connected to the common ground through a third matching circuit.

[0077] Optionally, the first resonant frequency point corresponds to the GPS L1 frequency band, the second resonant frequency point corresponds to the N77 / N78 frequency band, and the third resonant frequency point corresponds to the WIFI 5 GHz frequency band.

[0078] 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)).

[0079] 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.

[0080] 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.

[0081] 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.

[0082] 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.

[0083] 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.

[0084] 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.

[0085] 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 radiating branch, comprising a feeding point located at the center of the radiating branch, a first grounding point located at a first end of the radiating branch, and a second grounding point located at an opposite end of the first end, wherein the radiating branch is mirror-symmetrical about the feeding point, and the first grounding point and the second grounding point are respectively connected to a common ground; A first matching circuit, wherein the feeding point is connected to the feed source via the first matching circuit, and the first matching circuit is a capacitive matching circuit; The radiation branch has at least three different resonance modes, and the at least three resonance modes correspond to multiple resonance frequency points.

2. The antenna assembly according to claim 1, characterized in that: The at least three resonance modes include a first resonance mode, a second resonance mode and a third resonance mode, the first resonance mode is a composite left-right-hand mode from the first ground point to the feeding point, and the first resonance mode corresponds to a first resonance frequency point; The second resonance mode is a 1 / 2 wavelength ring mode from the first ground point to the feeding point, and the second resonance mode corresponds to a second resonance frequency point; The third resonance mode is a 1 / 4 wavelength mode from the feeding point to the first grounding point, and the third resonance mode corresponds to a third resonance frequency point.

3. The antenna assembly according to claim 2, characterized in that: The radiating branches are in a linear structural form.

4. The antenna assembly according to claim 2, characterized in that: The radiation branches include: The first branch; A second branch node which is mirror-symmetrical to the first branch node about the feeding point, wherein the first branch node and the second branch node are arranged according to a preset angle; The longitudinal current flowing through the first branch is greater than the longitudinal current flowing through the second branch, and the transverse current flowing through the first branch is less than the transverse current flowing through the second branch.

5. The antenna assembly according to claim 4, characterized in that: The preset angle is 90 degrees.

6. The antenna assembly according to claim 5, characterized in that: The antenna assembly is applied to an electronic device, the radiation branch is located at a first vertex angle of the electronic device, the first branch is parallel to a first side edge constituting the first vertex angle, the second branch is parallel to a second side edge constituting the first vertex angle, and the second side edges are perpendicular to each other.

7. The antenna assembly according to any one of claims 1 to 6, characterized in that: The first matching circuit includes a plurality of capacitive elements connected in series.

8. The antenna assembly according to any one of claims 1 to 6, characterized in that: The first ground point is connected to the common ground via a second matching circuit, and / or the second ground point is connected to the common ground via a third matching circuit.

9. The antenna assembly according to any one of claims 2 to 6, characterized in that: The first resonant frequency point corresponds to the GPS L1 frequency band, the second resonant frequency point corresponds to the N77 / N78 frequency band, and the third resonant frequency point corresponds to the WIFI 5 GHz frequency band.

10. An electronic device, characterized in that: It comprises a radio frequency transceiver chip and an antenna assembly as claimed in any one of claims 1 to 9.

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