Antenna components and electronic equipment

Abstract

The embodiment of the present application provides an antenna assembly, including a frame, a feeding circuit and a grounding circuit, the frame including a frame, the frame is provided with an antenna radiator, the antenna radiator has a feeding point and a grounding point arranged at intervals, the antenna radiator has an auxiliary radiating section extending from the grounding point toward a direction away from the feeding point, the auxiliary radiating section has a grounding point, and the grounding point and the grounding point are arranged at intervals; the feeding circuit is electrically connected to the feeding point; one end of the grounding circuit is connected to the grounding point, and the other end is grounded. An auxiliary radiating section is formed by extending the grounding point of the antenna radiator in the reverse direction. When the antenna is working, the current on the auxiliary radiating section is in the same direction as the current on the original antenna, and the current value is larger, so that without changing the feeding power, the spatial radiation of the entire antenna radiator is enhanced during operation, which has the effect of improving the radio frequency radiation performance. In addition, the embodiment of the present application also provides an electronic device.

Description

Technical Field

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

[0002] With the development of communication technology, people use mobile electronic devices such as mobile phones and tablet computers more widely in their daily lives.

[0003] Antennas are the main electronic components for realizing the communication function of electronic devices and are also one of the indispensable electronic components. Electronic devices in related technologies usually need to be equipped with multiple different types of antennas, such as 4G antennas, 5G antennas, WiFi antennas, GPS antennas, etc. At the same time, setting up multiple antennas has become a trend to ensure good communication of electronic devices, especially to keep the communication of electronic devices smooth in different communication environments.

[0004] In existing electronic devices, the radiator of the antenna is usually arranged on the outer frame of the electronic device. Since there are a large number of antennas and the outer frame of the electronic device also needs to be provided with various types of physical buttons, pickup holes, speaker holes, card slots, etc., the space is very crowded. How to arrange the antenna in a smaller space so that it has better radiation performance has become a problem that needs to be solved urgently. Summary of the invention

[0005] The purpose of the present application is to provide an antenna assembly and an electronic device to at least partially solve the above technical problems.

[0006] In the first aspect, an embodiment of the present application provides an antenna assembly, including a frame, a feeding circuit and a ground circuit, the frame including a frame, the frame being provided with an antenna radiator, the antenna radiator having a feeding point and a grounding point arranged at intervals, the antenna radiator having an auxiliary radiating section extending from the grounding point in a direction away from the feeding point, the auxiliary radiating section having a grounding point, the grounding point being arranged at intervals; the feeding circuit being electrically connected to the feeding point; one end of the ground circuit being connected to the grounding point, and the other end being grounded.

[0007] In a second aspect, an embodiment of the present application further provides an electronic device, comprising the above-mentioned antenna assembly.

[0008] The antenna assembly and electronic device provided in the embodiments of the present application form an auxiliary radiation section by extending in the reverse direction at the grounding point of the antenna radiator. When the antenna is working, the current on the auxiliary radiation section is in the same direction as the current on the original antenna, and the current value is larger, so that without changing the feeding power, the spatial radiation of the entire antenna radiator is enhanced during operation, thereby improving the RF radiation performance.

[0009] These and other aspects of the present application will become more clearly understood in the description of the following embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For those skilled in the art, other drawings can be obtained based on these drawings without creative work.

[0011] Figure 1 It is a structural schematic diagram of an electronic device proposed in an embodiment of the present application.

[0012] Figure 2 yes Figure 1 FIG. 1 is a schematic diagram of a partial structure of an electronic device after removing a rear cover.

[0013] Figure 3 yes Figure 1 Schematic diagram of the disassembled state of the housing assembly in the electronic device shown in FIG.

[0014] Figure 4 It is a structural schematic diagram of a frame provided in an embodiment of the present application.

[0015] Figure 5 It is a structural schematic diagram of an antenna radiator provided in an embodiment of the present application.

[0016] Figure 6 It is a circuit diagram of a feeding circuit provided in an embodiment of the present application.

[0017] Figure 7 It is a schematic diagram of the structure of another antenna radiator provided in an embodiment of the present application.

[0018] Figure 8 This is a SAR hotspot distribution diagram of an antenna radiator without an auxiliary radiation segment shown in an embodiment of the present application.

[0019] Fig. 9 This is a SAR hotspot distribution diagram of an antenna radiator provided in an embodiment of the present application.

[0020] Fig.10 It is an S parameter curve diagram of the antenna radiator provided in the LTE B28 frequency band according to an embodiment of the present application.

[0021] Fig.11 It is a curve diagram of the radiation efficiency and system efficiency of the antenna radiator in the LTE B28 frequency band provided in the embodiment of the present application.

[0022] Fig.12 It is a curve diagram of the radiation efficiency of the antenna radiator provided in the embodiment of the present application at different frequencies in the LTE B28 frequency band.

[0023] Fig.13 It is a system efficiency curve diagram of the antenna radiator provided in an embodiment of the present application at different frequencies in the LTE B28 frequency band. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0025] In the related art, the antenna of the electronic device is usually formed on the frame, mainly in the following ways:

[0026] One way is to use a metal frame, and then make slits in the frame for injection molding to divide the frame into multiple antenna radiators as antennas. This implementation requires first forming a metal frame, and then making slits in the frame according to the location of the antenna. After the slits are made, plastic is injected into the gaps, and the plastic is connected to other structures of the frame. Another way is to use non-metallic plastic and injection-mold the antenna into the frame.

[0027] Usually, electronic devices have display functions in two holding states: portrait mode and landscape mode. In order to adapt to the two different holding states, the antenna needs to avoid the area that is easily blocked by the user's hand when the device is held. At the same time, due to the large number of antennas that need to be installed, the available locations for antenna installation are relatively limited. In addition, when installing the antenna, the clear space between the antenna and the display screen needs to be considered, which further limits the size of the antenna radiator, resulting in low bandwidth and radiation efficiency of the antenna radiator.

[0028] Based on this, the inventor of the present application has proposed an antenna assembly and an electronic device after long-term research, which can more reasonably use the limited space, so that the radiation efficiency of the antenna is enhanced and the bandwidth is improved.

[0029] The content of this application is described in detail below with reference to the accompanying drawings and specific embodiments.

[0030] like Figure 1As shown, the present embodiment provides an electronic device 10. The electronic device 10 in the present application may be a mobile phone or a smart phone (e.g., a phone based on iPhone TM, a phone based on Android TM), a portable gaming device (e.g., Nintendo DS TM, PlayStation Portable TM, Gameboy Advance TM, iPhone TM), a laptop, a PDA, a portable Internet device, a music player, and a data storage device, other handheld devices, and devices such as watches, headphones, pendants, earphones, etc. The electronic device 10 may also be other wearable devices (e.g., head mounted devices (HMD) such as electronic glasses, electronic clothes, electronic bracelets, electronic necklaces, electronic tattoos, electronic devices, or smart watches).

[0031] Please also read Figure 1 and Figure 2 The electronic device 10 provided in this embodiment is described by taking a mobile phone as an example. The electronic device 10 includes a housing assembly 20, a display screen 30, a mainboard 50, a battery 60, etc. The mainboard 50 and the battery 60 are both arranged in the housing assembly 20. The electronic device may also be provided with a front camera, which is arranged on one side of the electronic device 10 where the display screen 30 is arranged.

[0032] See also Figure 3 The housing assembly 20 includes an antenna assembly 24, a front housing 25 and a rear housing 26. The antenna assembly 24 includes a frame 21, a feed circuit 300 ( Figure 5 ) and the ground circuit 200 ( Figure 5 As shown in the figure), the feeding circuit 300 is used to electrically connect the antenna component 24 to the mainboard 50 to achieve feeding, and the grounding circuit 200 is used to connect the antenna component 24 to the "ground" to achieve grounding.

[0033] In one embodiment, the frame 21 may be a middle frame of an electronic device, the frame 21 includes a middle plate 22 and a frame 23, the frame 23 is arranged around the edge of the middle plate 22, the frame 23 protrudes from the middle plate 22, and the frame 23 protrudes from the middle plate 22 on both opposite sides of the middle plate 22. The front shell 25 and the rear shell 26 are respectively assembled on the opposite sides of the middle plate 22, and the front shell 25 and the rear shell 26 are assembled and fixed with the frame 23; the rear shell 26, the frame 21 and the front shell 25 together form a cavity, the main board 50 is arranged in the cavity and fixed on the middle plate 22, and the cavity can also be used to set up a rear camera, antenna, processor and other components. The main board 50 is arranged on the middle plate, and the main board 50 can also be provided with various electronic components, including but not limited to processors, memories, antenna modules, speakers, receivers, etc., which are not specifically limited here. The main board 50 is provided with a soldering pad (not shown), and the electronic components are connected to the circuit on the main board 50 by soldering to the soldering pad. In some other implementations, the frame 21 may also be other partial structures of the electronic device, which is not limited here.

[0034] The display screen 30 is mounted on the front shell 25. The display screen 30 may use an LCD (Liquid Crystal Display) screen to display information. The LCD screen may be a TFT (Thin Film Transistor) screen or an IPS (In-Plane Switching) screen or an SLCD (Splice Liquid Crystal Display) screen. In other embodiments, the display screen 30 may use an OLED (Organic Light-Emitting Diode) screen to display information. The OLED screen may be an AMOLED (Active Matrix Organic Light Emitting Diode) screen or a Super AMOLED (Super Active Matrix Organic Light Emitting Diode) screen or a SuperAMOLED Plus (Super Active Matrix Organic Light Emitting Diode Plus) screen, which will not be described in detail here.

[0035] The frame 21 may be an integrated frame, wherein the frame 23 and the middle plate 22 may be formed integrally, so that the frame 21 has sufficient structural strength. The middle plate 22 may be partially or entirely made of metal material, which is not limited here. The middle plate 22 may serve as the "ground" of the antenna assembly 24. For example, in a more specific embodiment, the middle plate 22 may use a metal plate made of a magnesium alloy as a substrate, and the frame 23 may also use a metal frame and be cast integrally with the middle plate 22. In some other embodiments, the frame 23 may also be a non-metal frame, which is not limited here.

[0036] The middle plate 22 has a first side and a second side opposite to each other, wherein the front shell 25 is mounted on the first side of the middle plate 22, and the rear shell 26 is mounted on the second side of the middle plate 22. The frame 23 is connected to the edge of the middle plate 22 and extends toward the first side and the second side of the middle plate 22 at the same time. The frame 23 has an outer surface and an inner surface opposite to each other, and the inner surface can be formed into a ring shape. The middle plate 22 is connected to the inner surface of the frame, that is, the inner surface is arranged around the middle plate 22.

[0037] like Figure 4 As shown, the frame 23 includes a first frame 231 and a second frame 232 arranged along the length direction of the frame body 21, and a third frame 233 and a fourth frame 234 arranged along the width direction of the frame body, the first frame 231 and the second frame 232 are arranged opposite to each other, and the third frame 233 and the fourth frame 234 are arranged opposite to each other and connected between the first frame 231 and the second frame 232. In some embodiments, the connection between the first frame 231 and the third frame 233 and the fourth frame 234 can be arc-shaped, and the connection between the second frame 232 and the third frame 233 and the fourth frame 234 can be arc-shaped.

[0038] In this embodiment, the frame 23 is made of metal. Figure 4 and Figure 5 , a slit 230 is provided on the frame 23, and the slit 230 runs through the inner surface and the outer surface. The slit 230 separates the frame to form an antenna radiator 100. The antenna radiator 100 serves as the radio frequency structure of the antenna assembly 24, and is used to radiate signals outward or receive signals sent by an external device. Depending on the number of antennas, the number of slits 230 can be multiple, which is not limited here. And depending on the setting position of the antenna, the slit 230 can be opened at any position of the frame 23. In some other embodiments, the frame 23 can also be a non-metallic frame, in which case the antenna radiator 100 can be buried inside the frame 23 by injection molding.

[0039] As just an example, this embodiment shows a method of forming an antenna radiator 100, such as Figure 4As shown, the first frame 231 of the frame is provided with a first slit 230a and a second slit 230b, the first slit 230a divides the frame to form a first antenna radiator 100a, the second slit 230b divides the frame to form a second antenna radiator 100b, the second frame 232 is provided with a third slit 230c and a fourth slit 230d, the third slit 230c divides the frame to form a third antenna radiator 100c, the fourth slit 230d divides the frame to form a fourth antenna radiator 100d, etc., the third frame 233 and the fourth frame 234 are both provided with slits 230 and antenna radiators 100 are formed, which are not described one by one here. It should be noted that, according to design requirements, the metal frames on both sides of the slit 230 can be used as the antenna radiator 100, or only one side of the slit 230 can be used as the antenna radiator 100, which is not limited here.

[0040] When the user holds the electronic device in portrait mode, the hand usually holds the first frame 231 and the second frame 232. When the user holds the electronic device in landscape mode, the hands usually hold the third frame 233 and the fourth frame 234 respectively. At this time, the parts of the first frame 231 and the second frame 232 adjacent to the third frame 233 and the fourth frame 234 may also be blocked. Therefore, the setting position of the antenna radiator 100 arranged on the first frame 231 and the second frame 232 is extremely limited, which limits the radiation performance of the antenna radiator 100. At the same time, various buttons are usually set on the first frame 231 and the second frame 232, such as volume "+" and "-", mute button, power button, etc., which further limits the electrical length of the antenna radiator 100 set on the first frame 231 or the second frame 232.

[0041] It should be noted that, in this embodiment, the expressions "first", "second", "third", "fourth" and the like are only used for distinction, and do not represent limitations on specific structures. For ease of description, in this embodiment, the first frame 231 is provided with a button, and the first antenna radiator 100a is taken as an example to describe the structure of the antenna radiator 100 in detail:

[0042] See also Figure 5The antenna radiator 100 has a feed point 101 and a ground point 102 which are arranged at intervals. The feed point 101 is used to be electrically connected to the feed circuit 300 so that the feed circuit 300 can feed power to the antenna radiator 100. The ground point 102 is used to connect the "ground" of the frame to achieve the grounding of the antenna radiator 100. The antenna radiator 100 also has a first end 104 adjacent to the slit 230. The first end 104 is the end of the antenna radiator 100 away from the ground point 102. The feed point 101 is located between the first end 104 and the ground point 102. The distance between the feed point 101 and the first end 104 is A, and the distance between the feed point 101 and the ground point 102 is B. For ease of explanation, the antenna radiator 100 between the first end 104 and the ground point 102 is referred to as the main radiation section 110 below, and the length of the main radiation section 110 is A+B. Among them, the distance A between the first end 104 and the feeding point 101 is smaller than the distance B between the feeding point 101 and the grounding point 102, which can ensure that the main radiating section 110 has sufficient electrical length when radiating, and the direction of the generated feeding current is toward the grounding point 102 side.

[0043] One end of the feeding circuit 300 is connected to the main board 50, and the other end is electrically connected to the feeding point 101. The feeding point 101 can use metal springs, ejector pins and other components to achieve coupling between the feeding circuit 300 and the antenna radiator 100. Exemplarily, the RF module and the feeding circuit 300 are set on a printed circuit board (PCB). In the transmission scenario, the RF signal can be transmitted to the electrical connection component (such as the above-mentioned metal spring, ejector pin, etc.) at the feeding point 101 through the feeding circuit 300 on the PCB, and the RF signal can be transmitted to the antenna radiator 100 through the rigid connection of the electrical connection component or through the welding of conductive materials such as electronic circuits on the FPC. In this way, the antenna radiator 100 can transmit the RF signal (analog signal) in the form of electromagnetic waves at the working frequency band corresponding to the antenna. For example, the antenna radiator 100 can work in a low frequency band, so after receiving the radio frequency signal from the feeding point 101, the antenna radiator 100 can transmit the radio frequency signal in the form of electromagnetic waves at a low frequency. Correspondingly, in the receiving scenario, the antenna radiator 100 can receive a low-frequency electromagnetic wave signal (i.e., a low-frequency electromagnetic wave), and convert the low-frequency electromagnetic wave into an analog signal, which is fed back to the radio frequency module through the feeding point 101, thereby realizing the reception of the low-frequency signal.

[0044] In order to enable the antenna radiator 100 to radiate more frequency bands and enable it to be applied to different communication environments, the feeding circuit 300 may include a frequency band switching circuit, which is used to selectively switch the feeding frequency to achieve multiplexing of the antenna radiator 100. Exemplarily, the frequency band switching circuit can switch the feeding frequency, so that the feeding circuit 300 can feed various types of signals such as full-band 5G signals, low-frequency 4G signals, and high-frequency 4G signals to the feeding point 101.

[0045] As an example only, see Figure 6 This embodiment shows a structure of a feeding circuit 300, which includes a frequency band switching circuit 33 and a connection point, and the connection point is electrically connected to the main board 50. The frequency band switching circuit 33 includes a first path 313 and a second path 314, wherein the first path 313 and the second path 314 can realize the switching of different frequency bands in the intermediate frequency 4G signal; and the switching of different frequency bands in the high frequency 4G signal. The frequency band switching module 33 controls any one of the first path 313 and the second path 314 to be connected to the feeding point 101, so that signals of different frequency bands are fed to the feeding point 101. In some embodiments, the frequency band switching circuit 33 may also include a first connection terminal 311 and a second connection terminal 312. When the frequency band switching circuit 33 is connected to the feeding point 101 through the first connection terminal 311, the frequency band switching circuit 33 switches through the first path 313 and the second path 314, so that the high-frequency 4G signals (B40 / 41) of different frequency bands can be fed in. When the frequency band switching circuit 33 is connected to the feeding point 101 through the second connection terminal 312, the frequency band switching circuit 33 switches through the first path 313 and the second path 314, so that the intermediate frequency 4G signals (B1 / 3) of different frequency bands can be fed in. Since the intermediate frequency 4G signal can be fed in separately by the connection between the second connection terminal 312 and the second feeding point, it has a high communication efficiency in the full-band 4G signal, especially in the intermediate frequency 4G signal band, the communication efficiency is significantly improved.

[0046] It should be noted that in some other implementations, according to the design requirements of the antenna radiator 100, it can be configured to radiate other forms of signals, such as WiFi signals, GPS signals, etc., which are not limited here.

[0047] Please continue reading Figure 5, the antenna radiator 100 also has an auxiliary radiating section 120 extending from the grounding point 102 toward the direction away from the feeding point 101, that is, the antenna radiator 100 includes a main radiating section 110 and an auxiliary radiating section 120 connected to each other. The auxiliary radiating section 120 has a lower ground point 103, and the lower ground point 103 is arranged at a distance from the grounding point 102. The lower ground point 103 is located on the side of the grounding point 102 away from the feeding point 101. At the same time, the lower ground point 103 is located on the side of the grounding point 102 away from the first end 104, that is, the first end 104 is the end of the antenna radiator 100 away from the lower ground point 103. Among them, the distance between the grounding point 102 and the lower ground point 103 is C. One end of the lower ground circuit 200 is connected to the lower ground point 103, and the other end is grounded. The "ground" here can be a frame or other lower ground points.

[0048] In some implementations, in order to enable the auxiliary radiation section 120 to also achieve multi-band radiation, the ground circuit 200 may include a frequency modulation filter circuit, one end of the frequency modulation filter circuit is connected to the ground point 103, and the other end is grounded, and the frequency band is switched through the auxiliary radiation section 120. As a more specific implementation, Figure 5 As shown, the frequency modulation filter circuit may include a capacitor 210, one end of the two plates of the capacitor 210 is connected to the lower ground 103, and the other end is grounded. When the current signal loaded on both ends of the capacitor 210 changes, the capacitor 210 is used to pass the AC signal, and the higher the signal frequency, the smaller the impedance, and the larger the capacity of the capacitor 210, and the DC signal is cut off to achieve the purpose of frequency modulation filtering. By selecting the type of capacitor 210, the frequency modulation filter circuit can filter high frequencies or low frequencies. For example: when it is necessary to filter high frequencies, a ceramic capacitor 210 can be selected, and when it is necessary to filter low frequencies, an electrolytic capacitor 210 can be selected.

[0049] In particular, the frequency band switching circuit and the frequency modulation filter circuit can be configured to synchronously switch the same feeding frequency, so that the antenna radiator 100 only radiates a single frequency band at the same time.

[0050] In some embodiments, the length of the auxiliary radiation section 120 may be equal to the distance C between the grounding point 102 and the lower ground point 103. In another embodiment, Figure 7As shown, the first frame 231 is provided with two interval-set slits 230, and the antenna radiator 100 is formed between the two slits 230. At this time, the antenna radiator 100 has a first end 104 and a second end 105 opposite to each other, and the first end 104 and the second end 105 are respectively arranged adjacent to the two slits 230. The lower point 103 is located between the grounding point 102 and the second end 105, and the distance between the lower point 103 and the second end 105 is D. At this time, the length of the auxiliary radiation section 120 can be equal to the sum of the distance C between the grounding point 102 and the lower point 103 and the distance D between the lower point 103 and the second end 105, that is, the length of the auxiliary radiation section 120 is C+D.

[0051] The working principle of the antenna radiator 100 is introduced as follows:

[0052] When the feeding circuit 300 feeds power to the feeding point 101, current flows through the main radiating section 110 and the auxiliary radiating section 120, and the currents flowing through the main radiating section 110 and the auxiliary radiating section 120 have the same direction, so that the current in the same direction of the antenna radiator 100 can be increased, thereby enhancing the spatial radiation of the antenna radiator 100. The currents flowing through the main radiating section 110 and the auxiliary radiating section 120 are both fed by the feeding point 101.

[0053] In order to ensure that the main radiation section 110 plays a major radiation role when the entire antenna radiator 100 is working, the auxiliary radiation section 120 forms a current in the same direction to enhance the effect of spatial radiation. The length of the auxiliary radiation section 120 is less than the length of the main radiation section 110, that is, the length of the auxiliary radiation section 120 can be less than the distance between the grounding point 102 and the first end 104. In this way, after the entire antenna radiator 100 is fed by the feeding circuit 300, the current generated by the main radiation section 110 and the auxiliary radiation section 120 can be kept in the same direction, thereby increasing the effect of spatial radiation.

[0054] Figure 8 SAR hot spot distribution diagram when the antenna radiator 100 only includes the main radiation section 110 is shown. Fig. 9 The SAR hotspot distribution diagram is shown when the antenna radiator 100 includes both the main antenna radiator 100 and the auxiliary radiating section 120. Figure 8 and Fig. 9 It can be seen that when the auxiliary radiation section 120 is not set, the maximum antenna gain is about 3.13dBi. After the auxiliary radiation section 120 is set, the unidirectional current is concentrated and the intensity is greater. The maximum antenna gain is about 3.84dBi. Therefore, it can be seen that the spatial radiation of the antenna can be enhanced by setting the auxiliary radiation section 120.

[0055] Fig.10The figure shows the S parameter (scattering parameter) and radiation efficiency curve of the antenna assembly 24 when it works in the low frequency mode, where the horizontal axis is the frequency and the vertical axis is the radiation intensity. Curve S11 represents the S11 value of the antenna radiator 100 in the LTE B28 frequency band when the auxiliary radiation section 120 is not set, and curve S12 represents the S11 value of the antenna radiator 100 in the LTE B28 frequency band when the auxiliary radiation section 120 is not set. Fig.10 It can be seen that after the auxiliary radiation section 120 is provided, the main resonance of the antenna radiator 100 is basically unchanged, so it can be known that the provision of the auxiliary radiation section 120 will not affect the main resonance frequency of the antenna radiator 100. It can be understood that the antenna radiator 100 provided in this embodiment is not limited to application in the B28 frequency band, but can also be applied to radio frequency radiation in any other frequency band, and has similar technical effects.

[0056] Fig.11 The graphs of the radiation efficiency and system efficiency when the antenna assembly 24 works in the low-frequency mode are shown, wherein the curve S21 represents the radiation efficiency curve of the antenna radiator 100 in the low frequency band (700MHz-960MHz) when the auxiliary radiation section 120 is not provided, and the curve S22 represents the system efficiency curve of the antenna radiator 100 in the low frequency band (700MHz-960MHz) when the auxiliary radiation section 120 is not provided. The curve S23 represents the radiation efficiency curve of the antenna radiator 100 in the low frequency band (700MHz-960MHz) after the auxiliary radiation section 120 is provided, and the curve S24 represents the system efficiency curve of the antenna radiator 100 in the low frequency band (700MHz-960MHz) after the auxiliary radiation section 120 is provided. The radiation efficiency refers to the potential transmission capacity of the antenna radiator, such as the transmission capacity corresponding to 50% under 3d. The system efficiency refers to the radiation efficiency capacity finally presented by the entire system.

[0057] Fig.11 In the figure, the horizontal axis is the frequency and the vertical axis is the radiation intensity. Fig.11 It can be seen that after setting the auxiliary antenna radiator 120, the peak radiation intensity of the antenna radiator increases by about 1dB. In the low frequency band, the radiation intensity of each frequency increases by about 1dB. Taking -10dB as the limiting calculation bandwidth, the bandwidth is improved by 12M. After conversion, the bandwidth improvement can be obtained by about 20%.

[0058] Fig.12A graph of radiation efficiency at different frequency intervals in the low frequency band is shown, with the horizontal axis being the frequency and the vertical axis being the radiation intensity. Curve S31 represents the radiation efficiency curve of the antenna radiator 100 in the low frequency band (700MHz-850MHz) when the auxiliary radiation section 120 is not provided, curve S32 represents the radiation efficiency curve of the antenna radiator 100 in the low frequency band (750MHz-950MHz) when the auxiliary radiation section 120 is not provided, curve S33 represents the radiation efficiency curve of the antenna radiator 100 in the low frequency band (780MHz-960MHz) when the auxiliary radiation section 120 is not provided, and curve S34 represents the radiation efficiency curve of the antenna radiator 100 in the low frequency band (860MHz-960MHz) when the auxiliary radiation section 120 is not provided. Curve S35 represents the radiation efficiency curve of the antenna radiator 100 in the low frequency band (700MHz-850MHz) after the auxiliary radiation section 120 is set, curve S36 represents the radiation efficiency curve of the antenna radiator 100 in the low frequency band (750MHz-950MHz) after the auxiliary radiation section 120 is set, curve S37 represents the radiation efficiency curve of the antenna radiator 100 in the low frequency band (780MHz-960MHz) after the auxiliary radiation section 120 is set, and curve S38 represents the radiation efficiency curve of the antenna radiator 100 in the low frequency band (860MHz-960MHz) after the auxiliary radiation section 120 is set.

[0059] By comparing curves S31 and S35, S32 and S36, S33 and S37, S34 and S38 respectively, it can be seen that after the antenna radiator is set, the radiation efficiency in each frequency range is significantly improved.

[0060] Fig.13A graph of system efficiency in different frequency intervals of the low frequency band is shown, with the horizontal axis being the frequency and the vertical axis being the radiation intensity. Among them, curve S41 represents the system efficiency curve of the antenna radiator 100 in the low frequency band (680MHz-830MHz) when the auxiliary radiation section 120 is not provided, curve S42 represents the system efficiency curve of the antenna radiator 100 in the low frequency band (760MHz-920MHz) when the auxiliary radiation section 120 is not provided, curve S43 represents the system efficiency curve of the antenna radiator 100 in the low frequency band (800MHz-950MHz) when the auxiliary radiation section 120 is not provided, and curve S44 represents the system efficiency curve of the antenna radiator 100 in the low frequency band (840MHz-970MHz) when the auxiliary radiation section 120 is not provided. Curve S45 represents the system efficiency curve of the antenna radiator 100 in the low frequency band (680MHz-830MHz) after the auxiliary radiation section 120 is set, curve S46 represents the system efficiency curve of the antenna radiator 100 in the low frequency band (760MHz-920MHz) after the auxiliary radiation section 120 is set, curve S47 represents the system efficiency curve of the antenna radiator 100 in the low frequency band (800MHz-950MHz) after the auxiliary radiation section 120 is set, and curve S48 represents the system efficiency curve of the antenna radiator 100 in the low frequency band (840MHz-970MHz) after the auxiliary radiation section 120 is set.

[0061] By comparing curves S41 and S45, S42 and S46, S43 and S47, and S44 and S48 respectively, it can be seen that after the antenna radiator is set, the system efficiency in each frequency range is significantly improved.

[0062] The antenna assembly 24 provided in this embodiment is provided with an auxiliary radiation section 120, and the auxiliary radiation section 120 is grounded through a ground circuit 200, so that the auxiliary radiation section 120 can generate a current in the same direction as the main radiation section 110, so that the spatial radiation of the antenna radiator 100 is enhanced, the radiation efficiency is improved, and the main resonant frequency of the antenna radiator 100 is not changed. In particular, when applied to a horizontal screen antenna of an electronic device 10, the radiation efficiency can be improved without increasing the electrical length of the antenna radiator 100 too much, and the radiation effect of the horizontal screen antenna can be improved.

[0063] The above are only preferred embodiments of the present application and are not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. An antenna assembly, characterized in that: include: A frame, wherein the frame has an antenna radiator, the antenna radiator has a feeding point and a grounding point arranged at intervals, the antenna radiator includes an auxiliary radiating section extending from the grounding point in a direction away from the feeding point, the auxiliary radiating section has a lower point, the lower point is arranged at intervals from the grounding point, and the length of the auxiliary radiating section is less than the distance between the grounding point and the end of the antenna radiator away from the lower point; A feeding circuit, the feeding circuit being electrically connected to the feeding point; A lower ground circuit, one end of which is connected to the lower ground point, and the other end is grounded.

2. The antenna assembly according to claim 1, characterized in that: The distance between the end of the antenna radiator away from the lower ground point and the feeding point is smaller than the distance between the feeding point and the grounding point.

3. The antenna assembly according to claim 1, characterized in that: The grounding circuit comprises a frequency modulation filter circuit, one end of which is connected to the grounding point, and the other end of which is grounded.

4. The antenna assembly according to claim 3, characterized in that: The frequency modulation filter circuit comprises a capacitor, one end of the capacitor is connected to the lower ground, and the other end of the capacitor is grounded.

5. The antenna assembly according to claim 1, characterized in that: The feeding circuit includes a frequency band switching circuit, and the frequency band switching circuit is used for selectively switching the frequency band.

6. The antenna assembly according to claim 5, characterized in that: The frequency band switching circuit includes a first path and a second path, wherein the first path and the second path are used to feed signals of different frequency bands, and either the first path or the second path is selectively connected to the feeding point.

7. The antenna assembly according to any one of claims 1 to 6, characterized in that: The frame body comprises a frame, the frame is a metal frame, the frame is provided with a break, and the break separates the frame to form the antenna radiator.

8. The antenna assembly according to any one of claims 1 to 6, characterized in that: The frame body comprises a frame, the frame is a non-metal frame, and the antenna radiator is embedded in the frame by injection molding.

9. The antenna assembly according to any one of claims 1 to 6, characterized in that: The frame includes a frame, which includes a first frame and a second frame arranged along the length direction of the frame and a third frame and a fourth frame arranged along the width direction of the frame, the first frame and the second frame are arranged opposite to each other, the third frame and the fourth frame are arranged opposite to each other and connected between the first frame and the second frame, and the antenna radiator is arranged on the first frame and adjacent to the third frame.

10. An electronic device, characterized in that: Comprising the antenna assembly as described in any one of claims 1-9.

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