Antenna assembly and electronic equipment

Abstract

The invention relates to an antenna assembly and electronic equipment. The antenna assembly comprises a radiator, wherein the radiator comprises a feeding point and a connecting point which are arranged at an interval; the feed source is used for providing an excitation signal; the switching circuit is respectively connected with the connection point and the common ground end, and the switching circuit comprises a first switching state and a second switching state; wherein in the first switching state, the connection point is in conduction connection with the common ground end, and the excitation signal excites the radiator to generate a first resonance mode supporting a first frequency band; in a second switching state, the connection point is disconnected with the common ground end, and the excitation signal excites the radiator to generate a second resonant mode supporting the first frequency band; wherein the first resonance mode is different from the second resonance mode, the reconstruction of a directional diagram can be realized through a single antenna, and the occupied space of the antenna can be reduced while the performance of the antenna is improved.

Description

Technical Field

[0001] This application relates to the field of antenna technology, and in particular to an antenna assembly and electronic device. Background Technology

[0002] With the development of mobile communication technology, electronic devices support more and more frequency bands and functions, making antenna design space increasingly limited.

[0003] In related technologies, antenna pattern reconstruction in electronic devices utilizes the phased array beam scanning principle to achieve directional variable beam coverage based on multiple antennas. However, this requires setting up multiple antenna ports, which greatly increases the cost and size of the RF front end and is not conducive to the miniaturization of antenna components. Summary of the Invention

[0004] This application provides an antenna assembly and electronic device that can reconstruct the radiation pattern using a single antenna, thereby improving antenna performance while reducing the space occupied by the antenna.

[0005] In a first aspect, embodiments of this application provide an antenna assembly, including:

[0006] A radiator, the radiator comprising feed points and connection points spaced apart;

[0007] A feed source is used to provide an excitation signal;

[0008] A switching circuit is connected to the feed source, the feed point, and the connection point, respectively; wherein the switching circuit includes a first switching state and a second switching state.

[0009] During the first switching state, the connection point is connected to the common ground terminal, and the excitation signal excites the radiator to generate a first resonant mode supporting the first frequency band.

[0010] In the second switching state, the connection point is disconnected from the common ground terminal, and the excitation signal excites the radiator to generate a second resonant mode that supports the first frequency band; wherein the first resonant mode and the second resonant mode are different.

[0011] Secondly, embodiments of this application provide an electronic device, including the aforementioned antenna assembly.

[0012] The aforementioned antenna assembly and electronic device include an antenna assembly comprising a radiator, a feed source, and a switching circuit. The radiator includes spaced-apart feed points and connection points. The switching circuit is connected to the feed source, feed points, and connection points, and includes a first switching state and a second switching state. In the first switching state, the connection point is connected to a common ground terminal, and an excitation signal excites the radiator to generate a first resonant mode supporting a first frequency band. In the second switching state, the connection point is open-circuited, and an excitation signal excites the radiator to generate a second resonant mode supporting the first frequency band. The first and second resonant modes support the same frequency band but operate on radiating branches of different lengths. The radiation patterns of the first and second resonant modes are different, enabling the construction of two modes within the same frequency band for a single antenna. This achieves reconfigurable radiation patterns for a single antenna without relying on phased array beam scanning principles, avoiding the need for multiple antenna ports, simplifying the design of the RF front-end module, improving antenna performance, reducing antenna footprint, and facilitating miniaturization of the antenna assembly. Attached Figure Description

[0013] To more clearly illustrate the technical solutions in the embodiments of this application or the conventional technology, the drawings used in the description of the embodiments or the conventional technology will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0014] Figure 1 This is a schematic diagram of the structure of an electronic device according to an embodiment;

[0015] Figure 2 This is one of the structural schematic diagrams of an antenna assembly according to an embodiment;

[0016] Figure 3 This is a schematic diagram of an antenna assembly applied to an electronic device according to one embodiment;

[0017] Figure 4 A three-dimensional radiation pattern of an antenna assembly operating in a first resonant mode, as shown in one embodiment;

[0018] Figure 5 A two-dimensional radiation pattern of an antenna assembly operating in a first resonant mode, as shown in one embodiment;

[0019] Figure 6 A three-dimensional radiation pattern of an antenna assembly operating in a second resonant mode, as shown in one embodiment;

[0020] Figure 7 A two-dimensional radiation pattern of an antenna assembly operating in a second resonant mode, as shown in one embodiment;

[0021] Figure 8The diagram shows the distribution of the excitation current of an antenna assembly operating in a first resonant mode, according to one embodiment.

[0022] Figure 9 The diagram shows the distribution of the excitation current of an antenna assembly operating in the second resonant mode, according to one embodiment.

[0023] Figure 10 This is a second schematic diagram of the structure of an antenna assembly according to one embodiment;

[0024] Figure 11 This is the third schematic diagram of the antenna assembly in one embodiment;

[0025] Figure 12 This is a fourth schematic diagram of the structure of an antenna assembly according to one embodiment;

[0026] Figure 13 This is the fifth schematic diagram of the structure of an antenna assembly according to one embodiment;

[0027] Figure 14 This is a schematic diagram of the structure of an antenna assembly according to one embodiment;

[0028] Figure 15 This is the seventh schematic diagram of the structure of an antenna assembly according to one embodiment;

[0029] Figure 16 This is a schematic diagram of the structural framework of an electronic device according to an embodiment.

[0030] Explanation of reference numerals in the attached figures:

[0031] 10 - Electronic device; 101 - Display assembly; 102 - Housing; 1213 - Top bezel; 1215 - Bottom bezel; 1217 - First side bezel; 1219 - Second side bezel;

[0032] 110 - Radiator; 111 - First radiating branch; 113 - Second radiating branch;

[0033] 120 - Feed source; 130 - Switching circuit; 131 - First switching unit; 132 - Second switching unit; 133 - Third switching unit; 134 - Fourth switching unit;

[0034] 140 - Matching circuit; 141 - First matching unit; 142 - Second matching unit;

[0035] 151 - First tuning unit; 152 - Second tuning unit; 160 - Second tuning circuit; 170 - Parasitic branch;

[0036] 11-Memory; 1101-Operating System; 1102-Communication Module; 1103-Global Positioning System (GPS) Module;

[0037] 12-Processing circuitry; 13-Input / output (I / O) subsystem; 14-Antenna assembly. Detailed Implementation

[0038] To facilitate understanding of this application, a more complete description will be provided below with reference to the accompanying drawings, which illustrate embodiments of the present application. However, the present application can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided so that the disclosure of this application will be thorough and complete.

[0039] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application.

[0040] It is understood that the terms "first," "second," etc., used in this application may be used herein to describe various elements, but these elements are not limited by these terms. These terms are only used to distinguish one element from another. For example, without departing from the scope of this application, a first resonant mode may be referred to as a second resonant mode, and similarly, a second resonant mode may be referred to as a first resonant mode. Both the first and second resonant modes are resonant modes, but they are not the same resonant mode.

[0041] It is understood that the term "connection" in the following embodiments should be understood as "electrical connection," "communication connection," etc., if the connected circuits, modules, units, etc., have electrical signal or data transmission with each other.

[0042] When used herein, the singular forms of “a,” “an,” and “ / the” may also include the plural forms unless the context clearly indicates otherwise. It should also be understood that terms such as “comprising / including” or “having” specify the presence of the stated features, wholes, components, parts, or combinations thereof, but do not preclude the possibility of the presence or addition of one or more other features, wholes, components, parts, or combinations thereof. Meanwhile, the term “and / or” as used in this specification includes any and all combinations of the associated listed items.

[0043] This application provides an antenna assembly. The antenna assembly described in this application can be applied to electronic devices with wireless communication capabilities. These electronic devices can be handheld devices, in-vehicle devices, wearable devices, computing devices, or other processing devices connected to a wireless modem, as well as various forms of user equipment (UE), such as mobile phones, mobile stations (MS), etc. The antenna assembly provided in this application embodiment...

[0044] refer to Figure 1 In one embodiment, a mobile phone is used as an example for description. The electronic device 10 includes a display assembly 101 and a housing 102. The display assembly 101 includes a display screen, which can be an OLED (Organic Light-Emitting Diode) screen or an LCD (Liquid Crystal Display) screen. The display assembly 101 can be used to display information and provide an interactive interface for the user. The shape of the display screen can be rectangular or rounded rectangle. A rounded rectangle is sometimes also called a rounded rectangle, that is, the four corners of the rectangle are rounded, and the four sides of the rectangle are approximately straight lines.

[0045] The housing 102 includes a frame and a back cover. The frame can be made of a metal material such as aluminum alloy, magnesium alloy, or stainless steel, or it can be made of an insulating material such as plastic. The frame is located on the outer periphery of the display assembly 101 to support and protect the display assembly 101. The frame can further extend into the electronic device to form a middle plate; the integrally formed middle plate and frame are sometimes referred to as a mid-frame. The back cover is located on the side facing away from the display area and is connected to the frame. Furthermore, the display assembly 101 and the back cover are located on opposite sides of the middle plate.

[0046] The frame is roughly rectangular, including a top frame 1213 and a bottom frame 1215 positioned opposite each other, and a top frame 1213 and a bottom frame 1215 connecting the top frame 1213 and the bottom frame 1215. A first side frame 1217 and a second side frame 1219 are positioned opposite each other. The top frame 1213, the first side frame 1217, the bottom frame 1215, and the second side frame 1219 are connected end-to-end and located on the outer periphery of the middle plate. The connections between the frames can be right-angle connections or rounded transition connections. Furthermore, when the frame is a metal frame, multiple metal frame antennas can be formed within the frame. Specifically, these metal frame antennas can be formed through slots provided on the frame.

[0047] The back cover connects to the frame to define a receiving cavity, or installation space, for mounting electronic components such as batteries, motherboards, and camera modules of electronic devices. The motherboard can be a PCB (Printed Circuit Board) or an FPC (Flexible Printed Circuit). The motherboard can integrate functional devices such as processors, memory units, power management modules, baseband chips, cameras, sensors, and receivers of electronic devices.

[0048] The electronic device also includes a floor. Optionally, the frame surrounds the floor, meaning the floor is located within the receiving space formed by the frame. The floor is generally rectangular in shape. Various slots, holes, etc., are formed on the reference ground edge of the floor to accommodate devices or avoid other structures as needed in the mobile phone. The floor can form the common ground terminal of the electronic device 10, and can be a plane or structure with zero potential. For example, the floor can be formed through conductors, printed circuits, or metal printed layers in the electronic device; or, the floor can be formed on the motherboard, small board, or other carrier board of the electronic device 10; or, the floor can be part of the middle frame (also called the middle plate) of the electronic device 10. It should be noted that the above are several examples of floor types and should not be construed as limiting the floor provided in the embodiments of this application.

[0049] The following illustrations, with reference to the accompanying diagrams, provide examples of the specific structure of the antenna assembly.

[0050] like Figure 2 As shown, the antenna assembly includes a radiator 110, a feed 120, and a switching circuit 130. Exemplarily, the radiator 110 can be one of a flexible printed circuit (FPC) antenna radiator, a laser direct structural (LDS) antenna radiator, a printed direct structural (PDS) antenna radiator, or a metal radiating branch. In this embodiment, the type of radiator 110 is not further limited. For ease of explanation, this embodiment uses a metal radiating branch, such as the conductive frame of an electronic device, as an example.

[0051] The radiator 110 includes a feed point K and a connection point G spaced apart. A feed source 120 provides an excitation signal, which is fed into the radiator 110 through the feed point K. A switching circuit 130 is connected to the connection point G and a common ground terminal, and includes a first switching state and a second switching state. In the first switching state, the connection point G is connected to the common ground terminal, and the excitation signal excites the radiator 110 to generate a first resonant mode supporting a first frequency band. In the first switching state, the connection point G is effectively short-circuited and can be connected to the common ground terminal through the switching circuit 130. In the second switching state, the connection point G is disconnected from the common ground terminal, and the excitation signal excites the radiator 110 to generate a second resonant mode supporting the first frequency band. In the second switching state, the connection point G is effectively short-circuited, meaning that the connection point G is disconnected from the common ground terminal through the switching circuit 130. In one exemplary embodiment, the switching circuit 130 may include a single-pole single-throw switch, the first end of which is connected to a common ground terminal, and the second end of which is connected to the connection point G of the radiator 110. Optionally, the switching circuit 130 may also include a single-pole multi-throw switch, which may be connected to both the common ground terminal and the connection point G of the radiator 110. It should be noted that, in this embodiment, the specific switch type of the switching circuit 130 is not limited, and it is not limited to the examples described above.

[0052] When the switching circuit 130 is in a first switching state and a second switching state, its excitation signal can be transmitted to the radiator 110 to excite the radiator 110 to generate different resonant modes to support at least one first frequency band, thereby supporting the radiation of radio frequency signals of at least one first frequency band. The resonant modes generated by the radiator 110 are different, but the first frequency bands they support are the same. The first resonant mode and the second resonant mode are different, and the lengths of the electrical radiation branches corresponding to the different resonant modes are different. The radiation patterns of the first resonant mode and the third resonant mode are different. For example, the first frequency band may include one of a low-frequency band, a mid-frequency band, a high-frequency band, and an ultra-high-frequency band. Alternatively, the first frequency band may include multiple sub-bands of any frequency band, where any frequency band is a mid-frequency band, a high-frequency band, or an ultra-high-frequency band. In this embodiment, the first frequency band is not specifically limited. The number of first frequency bands can be one, two, three, or even more; in this embodiment, the number of first frequency bands is not limited. The first frequency band can be a 4G LTE signal band or a 5G NR signal band.

[0053] For example, the division of low-frequency bands, mid-frequency bands, and high-frequency bands for 4G LTE signals and 5G NR signals can be referred to in the table below.

[0054]

[0055] It is understood that in other embodiments, the embodiments of this application are not limited to the low frequency band, mid frequency band, high frequency band and ultra-high frequency band of the 4G LTE signal band and the 5G NR signal band. The first frequency band can also be the GPS band, WiFi band, etc.

[0056] In this embodiment, the antenna assembly includes a radiator, a feed source, and a switching circuit. The radiator includes spaced-apart feed points and connection points. The switching circuit is connected to the connection points and a common ground, and includes a first switching state and a second switching state. In the first switching state, the connection points are connected to the common ground, and the excitation signal excites the radiator to generate a first resonant mode supporting the first frequency band. In the second switching state, the connection points are disconnected from the common ground, and are in an open-circuit state. The excitation signal excites the radiator to generate a second resonant mode supporting the first frequency band. Different switching states of the switching circuit in this application result in different loading conditions at the connection points of the radiator, enabling variations in the resonant mode of a single antenna within the same frequency band. This achieves reconfigurable single-antenna radiation patterns, effectively forming complementary radiation patterns, reducing blind spots, covering weak directions, and improving antenna performance. Clearly, the antenna assembly provided in this embodiment does not require phased array beam scanning to reconstruct the radiation pattern, avoiding the need for multiple antenna ports, simplifying the design of the RF front-end module, improving antenna performance while reducing antenna space requirements, and facilitating miniaturization of the antenna assembly.

[0057] In an exemplary embodiment, the maximum radiation direction of the first resonant mode is different from that of the second resonant mode. It is understood that when the switching state of the switching circuit 130 is different, the current distribution excited on the radiator 110 by the excitation signal provided by its feed point K to the radiator 110 is also different. Specifically, when the switching circuit 130 is in the first switching state, and the excitation signal is fed to the radiator 110 through the feed point K, the excitation current generated on the radiator 110 is mainly distributed on the radiator 110 between the connection point G and the feed point K. When the switching circuit 130 is in the second switching state, and the excitation signal is fed to the radiator 110 through the feed point K, the excitation current generated on the radiator 110 is mainly distributed across the entire radiator 110. Thus, when the switching circuit 130 is in different switching states, the current distribution and electric field distribution on its radiator 110 are different, resulting in different maximum radiation directions of the antenna assembly in different resonant modes.

[0058] For example, for ease of illustration, an antenna assembly is applied to, such as Figure 1The following description uses an electronic device as an example. The radiator 110 in the antenna assembly can be located on the same side of the electronic device or at a corner of the electronic device. The electronic device may also include a conductive frame, which includes a top frame 1213 and a bottom frame 1215 disposed opposite to each other, and a first side frame 1217 and a second side frame 1219 disposed opposite to each other, wherein the top frame 1213, the first side frame 1217, the bottom frame 1215 and the second side frame 1219 are connected end to end in sequence. Exemplarily, the radiator 110 of the antenna assembly can be located on any frame of the electronic device, such as the top frame, the bottom frame or any side frame.

[0059] Optionally, the radiator 110 of the antenna assembly is positioned at a corner of the electronic device, such as... Figure 3 As shown. In an exemplary embodiment, the radiator 110 may include a first radiating branch 111 and a second radiating branch 113 that are connected to each other and extend in different directions, wherein the extending directions of the first radiating branch 111 and the second radiating branch 113 are different from and intersect each other. Exemplarily, the first radiating branch 113 may be located on the top edge 1213 of the electronic device, and the second radiating branch 113 may be located on the first side edge 1217 or the second side edge 1219 of the electronic device. Figure 3 In the antenna assembly shown, when the switching circuit is in the first switching state, that is, when the connection point G is short-circuited, the three-dimensional radiation pattern of the antenna assembly is as follows: Figure 4 As shown, the two-dimensional radiation pattern of the antenna assembly is as follows: Figure 5 As shown in the figure, the antenna assembly's radiation pattern is predominantly directed towards the left and bottom half of the region, with nulls near theta 150 and phi 80. When the switching circuit is in the second switching state, i.e., when connection point G is in an open-circuit state, the three-dimensional radiation pattern of its antenna assembly is as follows. Figure 6 As shown, the two-dimensional radiation pattern of the antenna assembly is as follows: Figure 7 As shown, the antenna assembly's radiation pattern is predominantly directed towards the right side, with nulls near theta100 and phi180.

[0060] from Figures 4-7 It can be seen that when the switching circuit 130 is in different switching states, that is, when the connection point G is in two different loading states, the directivity of the antenna changes significantly. Moreover, the changes before and after can form a good complementary situation. Therefore, it is possible to achieve the change of the resonant mode under the same frequency band of a single antenna, realize the reconfigurability of the single antenna pattern, effectively form pattern complementarity, reduce the blind zone of the pattern, cover weak directions, and improve antenna performance.

[0061] In one exemplary embodiment, the radiator 110 includes a first free end and a second free end disposed opposite to each other, wherein the feed point K is disposed relative to the connection point G near the first free end. Figure 8 As shown in the current distribution diagram, the first resonant mode includes a mode corresponding to a quarter wavelength of radiator 110 from the first connection point G to the first free end. The first resonant mode can be understood as a 1 / 4λ mode from connection point G to the first free end, and it can also be understood as an IFA mode. For example, the first resonant mode can also be an IFA mode with the opening facing upwards. Figure 9 As shown in the current distribution, the second resonant mode includes a half-wavelength mode of radiator 110. It can be understood that the second resonant mode can also be understood as a 1 / 2λ mode of the entire arm of radiator 110, which can also be interpreted as a T-antenna mode.

[0062] The switching state of the switching circuit in this application is different, and the loading of the connection point (grounding position) of the radiator is different, which can achieve the change of the resonant mode under the same frequency band of a single antenna, realize the reconfigurability of the single antenna pattern, effectively form pattern complementarity, reduce the pattern blind zone, cover weak directions, reduce the space occupied by the antenna, and improve the antenna performance.

[0063] In one exemplary embodiment, such as Figure 10 As shown, the antenna assembly also includes a matching circuit 140. The matching circuit 140 is connected to the switching circuit 130 and the feed point K, respectively, and is used to adjust the impedance in different resonant modes. For example, the switching circuit 130 may also include other switching states besides the first and second switching states, such as a third and fourth switching state. In the third and fourth switching states, the matching parameters of the matching circuit 140 are different to adapt to the impedance in different resonant modes, thereby achieving impedance matching requirements in different resonant modes. The matching parameters may include at least one of capacitance and inductance parameters.

[0064] In this embodiment, since the impedance difference of the radiator radiating the radio frequency signal of the first frequency band is relatively large in the first resonant mode and the second resonant mode, by setting the switching circuit and the matching circuit, corresponding matching tuning can be performed for different impedances to meet the impedance matching requirements and improve the radiation efficiency of the antenna assembly.

[0065] In one exemplary embodiment, such as Figure 11As shown, the switching circuit 130 includes a common terminal RFC, a first connection terminal RF1, a second connection terminal RF2, a third connection terminal RF3, and a fourth connection terminal RF4. The common terminal RFC is connected to the feed source 120 and the feed point K, respectively. The first connection terminal RF1 and the second connection terminal RF2 are connected to the connection point G, respectively. The second connection terminal RF2 and the third connection terminal RF3 are connected to the feed point K via a matching circuit 140. In the first switching state, the first connection terminal RF1 and the fourth connection terminal RF4 are connected to the common ground terminal; in the second switching state, the first connection terminal RF1 and the fourth connection terminal RF4 are disconnected from the common ground terminal.

[0066] In one exemplary embodiment, please continue to refer to Figure 11 The switching circuit 130 further includes: a first switching unit 131, a second switching unit 132, a third switching unit 133, and a fourth switching unit 134. Specifically, the first terminal of the first switching unit 131 is connected to the first connection terminal RF1, the second terminal of the first switching unit 131 is connected to the common ground terminal, and the third terminal of the first switching unit 131 is connected to the common ground terminal RFC. The first terminal of the second switching unit 132 is connected to the second connection terminal RF2, the second terminal of the second switching unit 132 is connected to the common ground terminal, and the third terminal of the second switching unit 132 is connected to the common ground terminal RFC. The first terminal of the third switching unit 133 is connected to the third connection terminal RF3, the second terminal of the third switching unit 133 is connected to the common ground terminal, and the third terminal of the fourth switching unit 134 is connected to the fourth connection terminal RF4, the second terminal of the fourth switching unit 134 is connected to the common ground terminal, and the third terminal of the fourth switching unit 134 is connected to the common ground terminal RFC.

[0067] For example, the first switch unit 131, the second switch unit 132, the third switch unit 133, and the fourth switch unit 134 may each include a first switch and a second switch, wherein the first switch and the second switch may each be a single-pole single-throw switch. Optionally, the first switch unit 131, the second switch unit 132, the third switch unit 133, and the fourth switch unit 134 may each include a single-pole double-throw switch. It should be noted that in the embodiments of this application, the specific switch type of each switch unit is not limited, nor is it limited to the examples described above.

[0068] In this embodiment, in the first switching state, the first switching unit 131 connects the path between the first connection terminal RF1 and the common ground terminal, and disconnects the path between the first connection terminal RF1 and the common terminal RFC; the fourth switching unit 134 connects the path between the fourth connection terminal RF4 and the common ground terminal, and disconnects the path between the first connection terminal RF1 and the common terminal RFC; in the second switching state, the first switching unit 131 is in the off state, and the fourth switching unit 134 is in the off state.

[0069] For ease of explanation, the following example illustrates how each of the first switch unit 131, the second switch unit 132, the third switch unit 133, and the fourth switch unit 134 may each include two single-pole single-throw switches. Figure 12 As shown. In the first switching state, switch SW5 in the first switching unit 131 is in the on state and switch SW1 is in the off state; switch SW8 in the fourth switching unit 134 is in the on state and switch SW4 is in the off state. In the second switching state, both switches SW5 and SW1 in the first switching unit 131 are in the off state; both switches SW8 and SW4 in the fourth switching unit 134 are in the off state.

[0070] Furthermore, by controlling the on / off state of each switch in the second and third switching units, the matching parameters of the matching circuit can be adjusted, and corresponding matching tuning can be performed for the impedance in different resonance modes to meet the impedance matching requirements and improve the radiation efficiency of the antenna assembly.

[0071] In one exemplary embodiment, please continue to refer to Figure 12 The matching circuit includes a first matching unit 141 and a second matching unit 142. The first end of the first matching unit 141 is connected to the second connection terminal RF2, and the second end of the first matching unit 141 is connected to a common ground terminal. The first end of the second matching unit 142 is connected to the third connection terminal RF3, and the second end of the second matching unit 142 is connected to a feed point K. The matching parameters of the first matching unit 141 and the second matching unit 142 are different. For example, the first matching unit 141 may include a first inductor, with its first end connected to the second connection terminal RF2 and its second end connected to a common ground terminal. The second matching unit 142 may include a first capacitor, with its first end connected to the third connection terminal RF3 and its second end connected to the feed point K. Optionally, the first matching unit 141 and the second matching unit 142 may further include multiple matching devices, which can be connected in series, parallel, or series-parallel, and these matching devices can be capacitors or inductors. In the embodiments of this application, the number of matching devices in the first matching unit 141 and the second matching unit 142, as well as the connection method between each matching device, are not specifically limited, nor are they limited to the examples described above.

[0072] In this embodiment, by setting the connection relationship between the switching circuit, the first matching unit, and the second matching unit, and by controlling the switching state of the switching circuit to connect one of the first and second matching units to the connection point, the matching parameters of the matching circuit can be adjusted. This allows the switching circuit to be reused without the need for an additional switching module. In other words, while reducing the cost of the antenna assembly, it can adapt to the impedance in the first and second resonant modes, thereby matching the impedance in different resonant modes and further improving the radiation efficiency of the antenna assembly.

[0073] In an exemplary embodiment, the antenna assembly further includes a first tuning circuit. This first tuning circuit is connected to the first connection terminal RF1 and the fourth connection terminal RF4 of the switching circuit 130, and to the connection point G of the radiator 110, respectively, for tuning the center frequency of a first frequency band. The switching circuit 130 can adjust the tuning parameters of the first tuning circuit, thereby adjusting the resonant point of the first frequency band. Different resonant points can change the first frequency band. For example, if the original first frequency band is band B1, adjusting the resonant parameters of the first tuning circuit through the switching circuit 130 can adjust the first frequency band to band B3. The tuning parameters of the first tuning circuit may include at least one of inductance parameters and capacitance parameters.

[0074] For ease of explanation, such as Figure 13 As shown, the first tuning circuit includes a first tuning unit 151 and a second tuning unit 152 as an example. The first terminal of the first tuning unit 151 is connected to the first connection terminal RF1, and the second terminal of the first tuning unit 151 is connected to the connection point G. The first terminal of the second tuning unit 152 is connected to the fourth connection terminal RF4, and the second terminal of the second tuning unit 152 is connected to the connection point G. Exemplarily, the first tuning unit 151 and the second tuning unit 152 may include one or more tuning devices. These tuning devices may include one of a capacitor, an inductor, and a bridging resistor. The tuning parameters of the first tuning unit 151 and the second tuning unit 152 may be the same or different. For example, the first tuning unit 151 may include a first tuning capacitor or a first bridging resistor, and the second tuning unit 152 may include a second tuning capacitor or a second bridging resistor.

[0075] When the switching circuit 130 is in the first switching state, its first tuning circuit can adjust the resonant frequency in the first resonant mode to achieve switching between different sub-frequency bands. Without adding an additional switching module, its antenna assembly can reduce the cost of the antenna assembly while covering multiple sub-frequency bands. For example, it can achieve full coverage of the MHB frequency band, such as the B3, B1, B40, B7, B41, etc., thereby improving the communication performance of the antenna assembly.

[0076] In one exemplary embodiment, such as Figure 14 As shown, based on any of the foregoing embodiments, the antenna assembly may further include a second tuning circuit 160. The first terminal of the second tuning circuit 160 is connected to the path between the feed source 120 and the feed point K, and the second terminal of the second tuning circuit 160 is connected to a common ground terminal, used to tune the center frequency of the first frequency band. In this embodiment, regardless of whether the switching circuit 130 is in the first switching state or the second switching state, the second tuning circuit 160 can change the center frequency of the first frequency band to cover multiple sub-bands.

[0077] For example, the second tuning circuit 160 may include a first tuning capacitor C1, a first tuning inductor L1, and a second tuning capacitor C2. The first terminals of the first tuning capacitor C1 and the first tuning inductor L1 are connected to a common ground terminal. The second terminals of the first tuning capacitor C1 and the first tuning inductor L1 are connected to the feed source 120. The first terminal of the second tuning capacitor C2 is connected to both the first terminal of the first tuning capacitor C1 and the feed source 120. The second terminal of the second tuning capacitor C2 is connected to the feed point K. It should be noted that the tuning devices included in the second tuning circuit 160 are not limited to the examples described above, and may also include combinations of different tuning devices.

[0078] In this embodiment, by setting the tuning parameters of each tuning device in the second tuning circuit, the resonant frequencies of the first resonant mode and the second resonant mode can be adjusted to achieve switching between different sub-bands. For example, it can cover the entire MHB band, such as the B3, B1, B40, and B7 MHB bands, thereby improving the communication performance of the antenna assembly.

[0079] In one exemplary embodiment, such as Figure 15As shown, the radiating stub of the antenna assembly may include a parasitic stub 170 in addition to the radiator 110. A coupling gap F is provided between the parasitic stub 170 and the first free end of the radiator 110, and the free end of the parasitic stub 170 away from the radiator 110 is connected to a common ground. Under the action of an excitation signal, the radiator 110 generates a first resonant mode or a second resonant mode to support a specific frequency band, and the parasitic stub 170 generates a third resonant mode to support a second frequency band. The resonant frequency corresponding to the first resonant mode is lower than the resonant frequency corresponding to the third resonant mode. The parasitic stub 170 has a grounding point connected to the common ground, and this grounding point is grounded. For example, when this antenna assembly is applied to an electronic device, the grounding point on the parasitic stub 170 can be connected to the ground plane of the electronic device's motherboard. The grounding point is located away from the coupling gap F. In this embodiment, the coupling gap F can be equivalent to a coupling capacitor to enable capacitive coupling between the radiator 110 and the parasitic branch 170. The size of the coupling gap F is determined according to actual needs and is not specifically limited here.

[0080] In an exemplary embodiment, when the switching circuit 130 is in a first switching state, the feed source 120 feeds an excitation signal to the radiator 110 through the feed point K. The radiator 110 can generate a first resonant mode, and its parasitic branch is capacitively coupled to the radiator 110 through a coupling gap F to support a third resonant mode. The third resonant mode is a quarter-wavelength monopole mode of the parasitic branch 170. In the third resonant mode, the parasitic branch 170 can support a second frequency band. Correspondingly, when the switching circuit 130 is in a second switching state, the feed source 120 feeds an excitation signal to the radiator 110 through the feed point K. The radiator 110 can generate a second resonant mode, and its parasitic branch is capacitively coupled to the radiator 110 through a coupling gap F to support the third resonant mode. For example, when the first frequency band is a mid-frequency band, the third frequency band can be a high-frequency band or an ultra-high-frequency band.

[0081] In this embodiment, by configuring a radiator and parasitic stubs that can be receptively coupled to the radiator, when the feed source feeds an excitation signal to the radiator through the feed point, the radiator and parasitic stubs can generate a first / second resonant mode and a third resonant mode to support the first and second frequency bands, thereby achieving multi-band coverage and improving the communication performance of the antenna assembly. Optionally, when the antenna assembly includes a first tuning circuit and a second tuning circuit, it can also be used to adjust the center frequency of the second frequency band to support multi-band coverage.

[0082] like Figure 16 As shown, further explanation will be given using mobile phone 10 as an example. Specifically, as... Figure 16As shown, the mobile phone 10 may include a memory 11 (which optionally includes one or more computer-readable storage media), processing circuitry 12, an input / output (I / O) subsystem 13, and at least one antenna assembly 14 as described in any of the foregoing embodiments. These components optionally communicate via one or more communication buses or signal lines 19. Those skilled in the art will understand that... Figure 16 The mobile phone 10 shown does not constitute a limitation on the mobile phone and may include more or fewer components than shown, or combine certain components, or have different component arrangements. Figure 16 The various components shown are implemented in hardware, software, or a combination of both, including one or more signal processing and / or application-specific integrated circuits.

[0083] Memory 11 optionally includes high-speed random access memory and also optionally includes non-volatile memory, such as one or more disk storage devices, flash memory devices, or other non-volatile solid-state memory devices. Exemplary examples include software components stored in memory 11 such as an operating system 1101, a communication module (or instruction set) 1102, a global positioning system (GPS) module (or instruction set) 1103, etc.

[0084] The processing circuit 12 can be used to control the operation of the mobile phone 10. This processing circuit 12 can be based on one or more microprocessors, microcontrollers, digital signal processors, baseband processors, power management units, audio codec chips, application-specific integrated circuits, etc. For example, the processing circuit 12 can control the switching state of the switching circuit 130 to achieve switching between different resonant modes of the antenna assembly 14. This enables the construction of two modes within the same frequency band for a single antenna, achieving reconfigurable radiation patterns for the single antenna. While improving antenna performance, it also reduces the space occupied by the antenna, which is beneficial for the miniaturization design of the antenna assembly.

[0085] The I / O subsystem 13 couples input / output peripherals on the mobile phone 10, such as the keypad and other input control devices, to the peripheral interface. The I / O subsystem 13 optionally includes a touchscreen, buttons, a tone generator, an accelerometer (motion sensor), an ambient light sensor and other sensors, light-emitting diodes and other status indicators, data ports, etc. For example, a user can control the operation of the mobile phone 10 by supplying commands via the I / O subsystem 13, and can use the output resources of the I / O subsystem 13 to receive status information and other outputs from the mobile phone 10. For instance, a user can press button 131 to turn the phone on or off.

[0086] In the description of this specification, references to terms such as "some embodiments," "other embodiments," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. In this specification, the illustrative descriptions of the above terms do not necessarily refer to the same embodiments or examples.

[0087] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0088] The above embodiments are merely illustrative of several implementation methods of this application, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of this application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this application should be determined by the appended claims.

Claims

1. An antenna assembly, characterized in that, include: A radiator, the radiator comprising feed points and connection points spaced apart; A feed source is used to provide an excitation signal; A switching circuit is connected to the connection point and a common ground terminal, and the switching circuit includes a first switching state and a second switching state; wherein... In the first switching state, the connection point is connected to the common ground terminal, and the excitation signal excites the radiator to generate a first resonant mode supporting the first frequency band; in the second switching state, the connection point is disconnected from the common ground terminal, and the excitation signal excites the radiator to generate a second resonant mode supporting the first frequency band; wherein, the first resonant mode and the second resonant mode are different.

2. The antenna assembly according to claim 1, characterized in that, The maximum radiation direction of the first resonant mode is different from that of the second resonant mode.

3. The antenna assembly according to claim 1, characterized in that, The radiator includes a first free end and a second free end disposed opposite to each other, wherein the feed point is disposed relative to the connection point closer to the first free end; wherein... The first resonant mode includes: the mode from the first connection end to the first free end of the radiator corresponding to a quarter wavelength of the radiator; The second resonant mode includes: the half-wavelength mode of the radiator.

4. The antenna assembly according to claim 3, characterized in that, The first resonant mode is the IFA mode, and the second resonant mode is the T-antenna mode.

5. The antenna assembly according to any one of claims 1-4, characterized in that, The antenna assembly also includes: A matching circuit is connected to the switching circuit and the feed point respectively, and is used to adjust the impedance under different resonance modes.

6. The antenna assembly according to claim 5, characterized in that, The switching circuit includes a common terminal, a first connection terminal, a second connection terminal, a third connection terminal, and a fourth connection terminal. The common terminal is connected to the feed source and the feed point, respectively. The first and second connection terminals are connected to the feed point, respectively. The second and third connection terminals are connected to the feed point via the matching circuit. In the first switching state, the first connection terminal and the fourth connection terminal are respectively connected to the common ground terminal; In the second switching state, the first connection terminal and the fourth connection terminal are disconnected from the common ground terminal.

7. The antenna assembly according to claim 6, characterized in that, The switching circuit further includes: A first switching unit, wherein a first end of the first switching unit is connected to the first connection end, a second end of the first switching unit is connected to a common ground end, and a third end of the first switching unit is connected to the common ground end; The second switch unit has a first end connected to the second connection end, a second end connected to the common ground end, and a third end connected to the common ground end. The third switch unit has a first end connected to the third connection terminal, a second end connected to the common ground terminal, and a third end connected to the common terminal. The fourth switch unit has a first end connected to the fourth connection terminal, a second end connected to the common ground terminal, and a third end connected to the common terminal. In the first switching state, the first switching unit connects the path between the first connection terminal and the common ground terminal, and disconnects the path between the first connection terminal and the common terminal. The fourth switch unit connects the path between the fourth connection terminal and the common ground terminal, and disconnects the path between the first connection terminal and the common terminal. In the second switching state, the first switching unit is in the off state, and the fourth switching unit is in the off state.

8. The antenna assembly according to claim 6, characterized in that, The matching circuit includes: A first matching unit, wherein a first end of the first matching unit is connected to the second connection end, and a second end of the first matching unit is connected to the common ground end; The second matching unit has a first end connected to the third connection end and a second end connected to the power supply point; wherein the matching parameters of the first matching unit and the second matching unit are different.

9. The antenna assembly according to claim 6, characterized in that, The antenna assembly also includes: The first tuning circuit is connected to the first connection terminal, the fourth connection terminal, and the connection point of the switching circuit, respectively, and is used to adjust the resonant point of the first frequency band.

10. The antenna assembly according to claim 1, characterized in that, The antenna assembly also includes: The second tuning circuit has a first terminal connected to the path between the feed source and the feed point, and a second terminal connected to the common ground terminal, for tuning the resonant frequency of the first frequency band.

11. The antenna assembly according to claim 1, characterized in that, The antenna assembly also includes: A parasitic branch has a coupling gap between itself and the first free end of the radiator, and the free end of the parasitic branch away from the radiator is connected to the common ground terminal, wherein... Under the action of the excitation signal, the parasitic stub generates a third resonant mode to support the second frequency band, wherein the resonant frequency corresponding to the first resonant mode is less than the resonant frequency corresponding to the third resonant mode.

12. The antenna assembly according to claim 11, characterized in that, The third resonant mode is a quarter-wavelength monopole mode of the parasitic branch.

13. The antenna assembly according to claim 1, characterized in that, The first frequency band includes one of the low frequency, medium frequency, high frequency and ultra-high frequency bands.

14. An electronic device, characterized in that, Includes the antenna assembly as described in any one of claims 1-13.

15. The electronic device according to claim 14, characterized in that, The electronic device includes a conductive frame, which includes a top frame and a bottom frame disposed opposite to each other, as well as a first side frame and a second side frame disposed opposite to each other. The radiator of the antenna assembly includes a first radiating branch and a second radiating branch that are connected to each other and extend in different directions. The first radiating branch is located on the top frame, and the second radiating branch is located on either the first side frame or the second side frame. The feed point is located on the first radiating branch, and the connection point is located on the second radiating branch.

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