Antenna module, middle frame assembly and electronic device

Abstract

This application relates to an antenna module, a mid-frame assembly, and an electronic device. The antenna module includes a first radiator, a second radiator, and a first matching circuit. The first radiator includes a first radiating stub and a second radiating stub that are interconnected and arranged in different directions. A coupling gap exists between a first end of the first radiating stub and a first end of the second radiator. A feed point and a first connection point are sequentially arranged on the first radiating stub from its first end to its second end connected to the second radiating stub. The feed point is connected to a signal source, and the first connection point is connected to the first matching circuit. The first matching circuit includes a grounding branch that is directly connected to the ground plane. The grounding branch is turned on when the antenna module operates in a first frequency band to support the radiating stub and the second radiator between the first connection point and the first end of the first radiating stub to cover the first frequency band through resonance corresponding to the zero-order mode. This antenna module has high antenna performance.

Description

Technical Field

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

[0002] Many electronic devices employ a three-section design, dividing the device into a motherboard area, a battery area, and a sub-board area. The antenna located near the motherboard area is called the upper antenna, and the antenna located near the sub-board area is called the lower antenna. However, current lower antenna designs suffer from poor performance. Summary of the Invention

[0003] Therefore, it is necessary to provide an antenna module, mid-frame assembly, and electronic device that can improve antenna performance in response to the above-mentioned technical problems.

[0004] In a first aspect, this application provides an antenna module. The antenna module includes a first radiator, a second radiator, and a first matching circuit; the first radiator includes a first radiating stub and a second radiating stub that are interconnected and arranged in different directions, and there is a coupling gap between a first end of the first radiating stub and a first end of the second radiator; a feed point and a first connection point are sequentially arranged on the first radiating stub along the direction from the first end to the second end connected to the second radiating stub, the feed point is connected to a signal source, and the first connection point is connected to the first matching circuit; the first matching circuit includes a grounding branch that is directly connected to the ground plane, and the grounding branch is turned on when the antenna module is operating in a first frequency band, so as to support the radiating stub between the first connection point and the first end of the first radiating stub and the second radiator to cover the first frequency band through resonance corresponding to the zero-order mode.

[0005] Secondly, this application also provides a mid-frame assembly. The mid-frame assembly includes the antenna module as described in the first aspect above, and the mid-frame assembly further includes: a substrate, including a signal source and a ground plane; and a frame surrounding the substrate, wherein the first radiator and the second radiator in the antenna module are disposed on the frame.

[0006] Thirdly, this application also provides an electronic device that includes the mid-frame component as described in the second aspect above.

[0007] The aforementioned antenna module, mid-frame assembly, and electronic device include an antenna module comprising a first radiator, a second radiator, and a first matching circuit. The first radiator includes a first radiating stub and a second radiating stub that are interconnected and arranged in different directions. A coupling gap exists between a first end of the first radiating stub and a first end of the second radiator. A feed point and a first connection point are sequentially arranged on the first radiating stub along the direction from the first end to the second end connected to the second radiating stub. The feed point is connected to a signal source, and the first connection point is connected to the first matching circuit. The first matching circuit includes a grounding branch that is directly connected to the ground plane. The grounding branch is turned on when the antenna module is operating in a first frequency band to support the radiating stub between the first connection point and the first end of the first radiating stub and the second radiator to cover the first frequency band through resonance corresponding to the zero-order mode. In this way, when the antenna module operates in the first frequency band, the generated zero-order mode ensures that the antenna module will not be significantly affected by the state switching of the first matching circuit in the resonance of the first frequency band. Furthermore, when the antenna module is installed as a lower antenna in an electronic device, the radiating stub between the first connection point and the first end of the first radiating stub and the second radiator cover the first frequency band through the resonance corresponding to the zero-order mode. Moreover, the radiating stub will not be significantly affected by the user's holding state in the zero-order mode, thereby ensuring the antenna performance of the antenna module operating in the first frequency band. Attached Figure Description

[0008] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art 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.

[0009] Figure 1 This is a schematic diagram of the antenna module structure in one embodiment;

[0010] Figure 2 This is a schematic diagram of the structure of another antenna module in one embodiment;

[0011] Figure 3 This is a schematic diagram of the structure of another antenna module in one embodiment;

[0012] Figure 4 This is a schematic diagram of the current distribution in one embodiment;

[0013] Figure 5 This is a schematic diagram of another current distribution in one embodiment;

[0014] Figure 6 This is a schematic diagram of antenna parameters in one embodiment;

[0015] Figure 7 This is a schematic diagram of another antenna parameter in one embodiment;

[0016] Figure 8 This is a schematic diagram of the structure of another antenna module in one embodiment;

[0017] Figure 9 This is a schematic diagram of another current distribution in one embodiment;

[0018] Figure 10 This is a schematic diagram of the structure of another antenna module in one embodiment;

[0019] Figure 11 This is a schematic diagram of the structure of another antenna module in one embodiment;

[0020] Figure 12 This is a schematic diagram of the structure of an electronic device in one embodiment.

[0021] Explanation of reference numerals in the attached figures:

[0022] 100. Antenna module; 101. First radiator; 102. Second radiator; 103. First matching circuit; 101A. First radiating stub; 101B. Second radiating stub; A1. First end of the first radiating stub; A2. Second end of the first radiating stub; D. Feed point; F1. First connection point; C1. First end of the second radiator; C2. Second end of the second radiator; 104. Signal source; 103a. Grounding branch; 103b. First matching branch; F2. Second connection point; 105. Second matching circuit. Detailed Implementation

[0023] To make the objectives, technical solutions, and advantages of this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this application.

[0024] To make the objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0025] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0026] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0027] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0028] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0029] It should be noted that when an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. When an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0030] Most electronic devices currently employ a three-section design, consisting of a motherboard, battery, and a small board. The antenna in the motherboard area is generally referred to as the upper antenna, and the antenna in the small board area as the lower antenna. Due to the smaller size of the small board area, typically only one or two antennas are designed to cover low or mid-to-high frequencies. However, current lower antennas suffer from drawbacks such as poor high and low frequency performance, significant influence from the user's grip, high cost, and difficulty in use in models with embedded components or metal frames, resulting in overall lower antenna performance.

[0031] In view of this, embodiments of this application provide an antenna module, a mid-frame assembly, and an electronic device, which can guarantee antenna performance when the antenna module is configured as a lower antenna.

[0032] Please refer to Figure 1 The diagram illustrates a structural schematic of an antenna module according to an embodiment of this application. The antenna module 100 includes a first radiator 101, a second radiator 102, and a first matching circuit 103. The first radiator 101 includes a first radiating stub 101A and a second radiating stub 101B that are interconnected and arranged in different directions. A coupling gap exists between the first end A1 of the first radiating stub and the first end C1 of the second radiator. A feed point D and a first connection point F1 are sequentially arranged on the first radiating stub along the direction from the first end A1 to the second end A2 of the first radiating stub connected to the second radiating stub. The feed point D is connected to a signal source 104, and the first connection point F1 is connected to the first matching circuit 103.

[0033] The first matching circuit 103 includes a grounding branch 103a that is directly connected to the ground. The grounding branch is turned on when the antenna module is operating in the first frequency band to support the first radiating branch and the second radiator 102 between the first connection point F1 and the first end A1 of the first radiating branch 101A to cover the first frequency band through the resonance corresponding to the zero-order mode.

[0034] To demonstrate the advantages of the antenna module 100 provided in the embodiments of this application, the following is now combined with Figure 2 and Figure 3 A schematic diagram of another exemplary antenna module 100 is shown for reference, and... Figure 1 A comparative explanation will be provided.

[0035] Please refer to Figure 2Taking the antenna as an example that supports intermediate frequency (IF), low frequency (LFM), and high frequency (HF) bands, the main radiating stub covers the IF band through balanced mode resonance under the excitation of the signal source. When the gating switch in the matching circuit switches between the low-frequency tuning state and the IF tuning state, the IF resonance will also generate frequency offset. As a result, when the antenna is in the CA (Carrier Aggregation) state of low frequency plus IF, the antenna performance is poor. Furthermore, since the main radiating stub is in balanced mode in the IF band, the current of the main radiating stub excitation is concentrated near the corner of the main radiating stub. When the antenna is a lower antenna, this corner is the part that the user often holds. Therefore, when holding the antenna, the current at the corner is affected, and the performance of the antenna will deteriorate significantly.

[0036] Specifically, in Figure 2 In the scheme shown, the intermediate frequency is generated by the balanced mode of the L-shaped main radiator, such as... Figure 4 The diagram illustrates the current distribution of the antenna structure when operating in the intermediate frequency (IF) band. It shows that a large amount of current converges at the corner of the main radiator, while high frequencies are generated by the second parasitic stub. Understandably, when a user holds the antenna with one hand, they may completely cover the corner and the second parasitic stub, altering the current path and significantly degrading antenna performance. Furthermore, because the matching branch is located at the end of the coupling gap near the first parasitic stub of the main radiating stub, the loading effect is significant. This results in a substantial shift in the IF resonance when the matching circuit switches to use inductors or capacitors to support other frequency bands such as low frequencies, leading to poor antenna performance.

[0037] Please refer to Figure 3 This structure includes antennas 1 and 2, which can function as low-frequency and mid-to-high-frequency antennas, respectively. However, due to its dual-feed configuration, there are two signal sources, requiring two coaxial cables to connect the signal sources and the feed points of the radiator for transmitting the RF signal fed from the signal sources, significantly increasing costs. If a single coaxial cable with a combiner is used, the power of the RF signal reaching the antenna will be lower due to additional combiner insertion loss and board trace losses, affecting the overall radiation performance of the antenna. Furthermore, this structure requires antenna springs to be loaded on the side of the frame to feed the signal; however, the placement of these springs is critical, and if their location is obstructed by other devices or structural components (e.g., Figure 3 If the antenna is occupied by the speaker and headphone jack, the antenna solution will be difficult to implement and will also increase the cost.

[0038] The antenna module 100 provided in this application embodiment optimizes the above-mentioned problems. The antenna module 100 can operate in a first frequency band, which can be, for example, an intermediate frequency band, as will be used as an example in the following description.

[0039] Among them, reference Figure 1 It can be seen that the distance between the first matching circuit 103 and the first end A1 of the first radiating stub 101A is greater than the distance between the feed point D and the first end A1 of the first radiating stub 101A.

[0040] As mentioned above, when the antenna module 100 operates in the first frequency band, the radiating stub between the first connection point F1 and the first end A1 of the first radiating stub 101A, and the second radiator 102 operate. This part of the radiator covers the first frequency band through the resonance corresponding to the zero-order mode. Therefore, it can be seen that the antenna module 100 supports the first frequency band based on the IFA antenna (Inverted F Antenna) formed by the radiating stub between the first connection point F1 and the first end A1 of the first radiating stub 101A, and the parasitic stub formed by the second radiator 102.

[0041] Furthermore, in the antenna module 100, the smaller the inductance value loaded at the first matching circuit 103, the lower the proportion of the balanced mode at the intermediate frequency. Based on this, in this embodiment, when the antenna module 100 operates in the first frequency band (e.g., the intermediate frequency band), the grounding branch 103a directly connected to the ground in the first matching circuit 103 is controlled to be turned on, making the first matching circuit 103 short-circuited. At this time, the radiating branch and the second radiator 102 between the first connection point F1 and the first end A1 of the first radiating branch 101A completely change from the balanced mode to the zero-order mode. The first matching circuit 103 may also include other matching branches. When the first matching circuit 103 switches to other branches, it will no longer have a significant impact on the resonance of the first frequency band. Furthermore, as Figure 5 It shows Figure 1 The diagram shown illustrates the current distribution of the antenna module 100 when it operates in the first frequency band, and... Figure 4 In comparison, the current no longer concentrates significantly at the corner (the connection point of the first radiating stub 101A and the second radiating stub 101B). Therefore, when a user holds the electronic device by gripping the corner, it will not significantly affect the performance of the antenna module 100 in the first frequency band, thus ensuring the antenna's performance. Furthermore, compared to... Figure 3 A comparison of the two schemes shows that... Figure 1 The antenna module 100 shown does not require multiple signal sources and reduces the requirements for antenna placement, thereby reducing costs.

[0042] For example, such as Figure 6 It shows Figure 2 The diagram shows the antenna S1,1 parameters when the matching circuit is in a switching state. Each S1,1 curve corresponds to a different matching circuit connection state; for example, such as... Figure 7 The embodiments provided in this application are shown. Figure 1The diagram shows the antenna S1,1 parameters of the antenna module 100 when the matching circuit is switched. Each S1,1 curve corresponds to a different matching circuit connection state. A comparison shows that when the zero-order mode becomes the dominant mode in the first frequency band, the impact of the holding state on antenna performance is improved because there is no longer a large current distribution at the corners. The switching of the state of the first matching circuit 103 will not lead to a decrease in antenna performance.

[0043] In an optional embodiment of this application, the antenna module 100 can be used as a lower antenna and disposed in a small board area of ​​the electronic device. For example, as Figure 1 As shown, the first radiator 101 and the second radiator 102 are arranged around the small board area, and the signal source 104 and the first matching circuit 103 are arranged in the small board area. It is understood that the antenna can also be arranged in other locations on the electronic device according to the usage requirements of the electronic device, which is not fully illustrated here.

[0044] In optional embodiments of this application, such as Figure 1 As shown, the second terminal C2 of the second radiator 102 is grounded. Thus, when the antenna module 100 operates in the first frequency band, the current generated by the excitation of the radiating stub between the first connection point F1 and the first terminal A1 of the first radiating stub 101A and the second radiator 102 returns to ground from the second terminal C2 of the second radiator 102.

[0045] In optional embodiments of this application, such as Figure 1 As shown, the second radiator 102 can be in a straight line shape.

[0046] The antenna module 100 includes a first radiator 101, a second radiator 102, and a first matching circuit 103. The first radiator 101 includes a first radiating stub 101A and a second radiating stub 101B that are interconnected and arranged in different directions. A coupling gap exists between the first end A1 of the first radiating stub 101A and the first end C1 of the second radiator 102. Feed circuits are sequentially arranged on the first radiating stub 101A from the first end to the second end connected to the second radiating stub 101B. Feed point D and first connection point F1, the feed point D is connected to signal source 104, the first connection point F1 is connected to the first matching circuit 103; wherein, the first matching circuit 103 includes a ground branch 103a that is directly connected to the ground, the ground branch 103a is turned on when the antenna module 100 is operating in the first frequency band, so as to support the radiating stub between the first connection point F1 and the first end A1 of the first radiating stub 101A and the second radiator 102 to cover the first frequency band through the resonance corresponding to the zero-order mode. In this way, when the antenna module 100 operates in the first frequency band, the generated zero-order mode ensures that the antenna module 100 will not be significantly affected by the state switching of the first matching circuit 103 in the resonance of the first frequency band. Furthermore, when the antenna module 100 is installed as a lower antenna in an electronic device, the radiating stub between the first connection point F1 and the first end A1 of the first radiating stub 101A and the second radiator 102 cover the first frequency band through the resonance corresponding to the zero-order mode. Moreover, the radiating stub will not be significantly affected by the user's holding state in the zero-order mode, thereby ensuring the antenna performance of the antenna module 100 operating in the first frequency band.

[0047] In one embodiment, the first radiator 101 is L-shaped.

[0048] For example, such as Figure 1 As shown, the orientation of the first radiating branch 101A intersects the orientation of the second radiating branch 101B. Optionally, the orientation of the first radiating branch 101A and the orientation of the second radiating branch 101B are perpendicular or nearly perpendicular, which is not strictly limited here. In other words, the connection point of the first radiating branch 101A and the second radiating branch 101B is at a right angle, or the difference between the angle at the connection point and the right angle is less than a preset angle threshold.

[0049] For example, if the first radiating branch 101A is set in a horizontal direction, then the second radiating branch 101B is set in a vertical direction.

[0050] In this way, the first radiator 101 can operate in multiple frequency bands while ensuring the radiation length of the first radiator 101. For example, some radiating branches in the first radiator 101 can operate in a third frequency band, as described below.

[0051] In one embodiment, the grounding branch 103a is turned on when the antenna module 100 is operating in the second frequency band, so as to support the second radiator 102 to operate in the second frequency band under the excitation of the signal source 104.

[0052] In one possible implementation, the first radiator 101 and the second radiator 102 are formed by the metal frame of the electronic device's mid-frame assembly. Exemplarily, the frame in the mid-frame assembly includes an interconnected first frame and a second frame disposed around a small board of the electronic device; as... Figure 8 As shown, the first radiating branch 101A is formed by the first part of the first frame, the second radiating branch 101B is formed by the first part of the second frame, and the second radiator 102 is formed by the second part of the first frame.

[0053] It is understandable that the first border and the second border are set in different directions. For example, the setting direction of the first border and the setting direction of the second border are perpendicular. They can be strictly perpendicular or nearly perpendicular.

[0054] For example, the borders include a top border and a bottom border that are set relative to each other, and a left border and a right border that are set relative to each other. In one possible implementation, the first border can be the bottom border, and correspondingly, the second border can be the right border, or the second border can be the left border.

[0055] In an optional embodiment of this application, the electronic device is provided with a target communication interface. A first radiator 101 covers the target communication interface; a second radiator 102 is located on one side of the target communication interface.

[0056] For example, such as Figure 8 As shown, the target communication interface is located in the center of the first frame (not shown). The first end of the target communication interface is close to the first end of the first frame, and the second end of the target communication interface is close to the second end of the first frame. The first radiating branch 101A in the first radiator 101 is formed by the portion of the first frame from the first end of the target communication interface to the second end of the first frame. The second radiator 102 is formed by the remaining portion of the first frame that has a coupling gap with the first radiating branch 101A. For example, the second end C2 of the second radiator 102 is located at the first end of the first frame.

[0057] When the antenna module 100 operates in the first frequency band, the signal source 104 feeds in the first power supply signal of the first frequency band, and the radiating stub between the first connection point F1 and the first end A1 of the first radiating stub 101A and the second radiator 102 operate in the first frequency band under the excitation of the first power supply signal.

[0058] In addition, the antenna module 100 can also operate in the second frequency band. When the antenna module 100 operates in the second frequency band, the signal source 104 feeds in a second feed signal of the second frequency band. The second feed signal is transmitted to the second radiator 102 through the coupling gap, thereby causing the second radiator 102 to operate in the second frequency band under the excitation of the second feed signal.

[0059] In an optional embodiment of this application, the frequency range of the second frequency band is greater than that of the first frequency band. For example, the first frequency band is a mid-frequency band, and the second frequency band is a high-frequency band.

[0060] Based on this Figure 2 In the illustrated structure, the second parasitic stub operates in a high-frequency band under the excitation of the feed signal input from the signal source 104. However, the user may hold the second parasitic stub, resulting in poor high-frequency performance of the antenna. In this embodiment, the second radiator 102 supports a second frequency band (e.g., a high-frequency band), compared to... Figure 2 The configuration method lengthened the second radiator 102, and as... Figure 9 The diagram shows the current distribution when the antenna module 100 is operating in the second frequency band. The current distribution is not concentrated in large quantities at the corners, and the coupling gap between the first radiator 101 and the first radiating branch 101A is not held. The holding method has little impact on the antenna performance in the second frequency band.

[0061] In one embodiment, such as Figure 10 A schematic diagram of another antenna module 100 is shown. The first matching circuit 103 further includes a first matching branch 103b, which is turned on when the antenna module 100 is operating in the third frequency band, so as to support the first terminal A1 of the feed point D to the first radiating stub 101A and the second radiating stub 101B to operate in the third frequency band under the excitation of the signal source 104.

[0062] In an optional embodiment of this application, the first frequency band is a mid-frequency band, the second frequency band is a high-frequency band, and the third frequency band is a low-frequency band. Thus, when the antenna module 100 operates in the third frequency band, the signal source 104 can be fed with a third feed signal of the third frequency band. The feed point D to the first end A1 of the first radiating stub 101A and the second radiating stub 101B operate in the third frequency band under the excitation of the third feed signal. Therefore, the antenna module 100 can cover the entire frequency range of mid-frequency, low-frequency, and high-frequency, improving the antenna's application range. When this antenna is used as a lower antenna in an electronic device, in addition to covering multiple frequency bands, it can also save installation space compared to using multiple antennas.

[0063] As shown in Table 1 Figure 2 The first scheme shown and Figure 1The diagram shows a comparison of antenna efficiency in different frequency bands when the antenna is in free space, held by the right hand and close to the user's head, and held by the left hand and close to the user's head. It is evident that the antenna efficiency of the antenna module 100 provided in this embodiment is effectively improved.

[0064] Table 1

[0065]

[0066] Furthermore, the antenna module 100 provided in this application embodiment can cover multiple frequency bands, and therefore can operate in a multi-band combined CA state.

[0067] For example, Table 2 shows a comparison of antenna efficiency between the first scheme and the scheme of this application under some CA band combinations. The first column represents the current main carrier frequency band state of the antenna, and the second row represents the secondary carrier frequency band of the antenna under the main carrier frequency band state. As can be seen from Table 2, under the CA states of low frequency plus intermediate frequency, intermediate frequency plus high frequency, and intermediate frequency plus intermediate frequency, the antenna efficiency of the antenna module 100 provided in the embodiment of this application is better.

[0068] Table 2

[0069]

[0070] As can be seen, the antenna module 100 provided in this application embodiment not only improves the antenna efficiency in the B28 band by 2dB compared with the first solution, but also improves the antenna efficiency in the holding state in the mid-to-high frequency band by 1 to 3dB, thus enhancing the overall antenna performance. Furthermore, the antenna's CA performance is improved, and the mid-frequency antenna efficiency will not deteriorate significantly due to low-frequency switching.

[0071] In addition, refer to Figure 1 It can be seen that the antenna module 100 has low requirements for stacking layout, does not need to place antenna springs on the side frame of electronic devices, and has high flexibility in antenna setting.

[0072] In one embodiment, the first matching circuit 103 includes a first gating switch connected to a ground branch 103a and a first matching branch 103b; the first gating switch is used to turn on the ground branch 103a when the antenna module 100 is operating in a first frequency band and a second frequency band; the first gating switch is also used to turn on the first matching branch 103b when the antenna module 100 is operating in a third frequency band, so as to use the first matching branch 103b to tune the third frequency band.

[0073] Thus, when the antenna module 100 operates in the first and second frequency bands, the selection switch is short-circuited by connecting the grounding branch 103a. This causes the radiating stub between the first connection point F1 and the first end A1 of the first radiating stub 101A to resonate in the first frequency band based on the zero-order mode, no longer sensitive to the switching of the selection switch. The waveform change in the first frequency band is smaller, resulting in better overall CA performance of the antenna. Furthermore, the third frequency band is tuned using the first matching branch 103b, allowing the antenna module 100 to operate in the third frequency band, effectively increasing the operating frequency range of the antenna module 100.

[0074] In one embodiment, such as Figure 11 A schematic diagram of another antenna module 100 is shown. The second radiator 102 has a second connection point F2, and the antenna module 100 also includes a second matching circuit 105 connected to the second connection point. The second matching circuit 105 includes a second gating switch, a second matching branch, and a third matching branch. The second matching branch is used to tune a first frequency band when the gating switch is activated and the third matching branch is engaged; the third matching branch is used to tune a second frequency band when the gating switch is activated and the third matching branch is engaged.

[0075] For example, the second connection point F2 is located near the first end C1 of the second radiator 102. The second connection point F2 is located between the grounding point of the second radiator 102 and the first end. Alternatively, in some possible implementations, F2 is located at the first end C1 of the second radiator 102, which can be set according to usage requirements and is not fully exemplified here.

[0076] In this way, by tuning the second radiator 102 based on the second matching circuit 105, the antenna performance can be further improved.

[0077] In one embodiment, a third connection point is provided on the second radiating stub 101B, and the antenna module 100 further includes a third matching circuit connected to the third connection point. When the antenna module 100 operates in the third frequency band, the third matching circuit is turned on to tune the third frequency band, thereby further improving the performance of the antenna when operating in the third frequency band.

[0078] In one embodiment, the first radiator 101 and the second radiator 102 are metallic radiators.

[0079] That is, as mentioned above, the frame of the electronic device's mid-frame assembly is a metal frame, and the first radiator 101 and the second radiator 102 are formed based on the first frame and the second frame.

[0080] In one embodiment, the first radiator 101 and the second radiator 102 are FPC (Flexible Printed Circuit) radiators.

[0081] For example, the first radiating branch 101A and the second radiator 102 are arranged in the same direction as the first frame, and the second radiating branch 101B is arranged in the same direction as the second frame.

[0082] In this way, the antenna module 100 can be installed in electronic devices using materials such as metal frames and plastic shells, thus expanding the application range of the antenna module 100.

[0083] In summary, the antenna module provided in this application embodiment optimizes the antenna mode distribution, making the mode distribution of the antenna module less affected by switch switching, which greatly improves the antenna performance of the antenna module when it is held in the mid-to-high frequency lamp band. At the same time, it significantly improves the CA performance of the antenna module, resulting in an overall improvement in antenna performance.

[0084] In one embodiment, a mid-frame assembly is provided, including an antenna module 100 as described in any of the above embodiments. The mid-frame assembly further includes: a substrate, including a signal source and a ground plane; and a frame surrounding the substrate, with a first radiator and a second radiator in the antenna module disposed on the frame. The substrate can be a conductive metal, or other materials. The signal source and the ground plane in the electronic device can be disposed on the substrate. In some embodiments, the signal source may not be disposed on the substrate, but directly on the circuit board. The frame can be a conductive metal, so the frame can also be called a "metal frame." Of course, the frame can also be other materials. The mid-frame assembly and the back cover can form a housing assembly. The housing assembly is not limited to the mid-frame assembly and the back cover. The radiators can be disposed in the housing assembly by means of bonding, adhesive, snap-fit, fastening, welding, etc.

[0085] In one embodiment, the first radiator and the second radiator are disposed on the target side frame of the frame, that is, they can be manufactured from the target side frame. The target side frame is the first frame and the second frame mentioned above.

[0086] In one embodiment, an electronic device is also provided, the electronic device including the mid-frame component as in any of the above embodiments.

[0087] The electronic device may also include a display screen and a back cover, wherein the display screen is disposed on one side of the mid-frame assembly and the back cover is disposed on the other side of the mid-frame assembly, forming a receiving cavity with the mid-frame assembly.

[0088] In one embodiment, the frame in the mid-frame assembly includes an interconnected first frame and a second frame disposed around a small board of the electronic device; a first radiating branch is formed by a first portion of the first frame, and a second radiating branch is formed by a first portion of the second frame; a second radiator is formed by a second portion of the first frame.

[0089] The term "electronic device" (also referred to as "terminal," "mobile terminal," or "electronic device") as used above includes a device for receiving / transmitting communication signals. It may also be referred to as a "wireless communication terminal," "wireless terminal," or "mobile terminal." Examples of mobile terminals include, but are not limited to, satellite or cellular phones; personal communication system (PCS) terminals that may combine cellular radiotelephone with data processing, fax, and data communication capabilities; PDAs that may include radiotelephones, pagers, Internet / intranet access, web browsers, notebooks, calendars, and / or Global Positioning System (GPS) receivers; and conventional laptop and / or handheld receivers or other electronic devices that include radiotelephone transceivers.

[0090] Please refer to Figure 12 , Figure 12 This is a schematic diagram of the structure of an electronic device 1500 according to an embodiment of this application. The electronic device 1500 may include a display screen 50 for displaying information, a mid-frame assembly 60 for mounting the display screen 50 on one side, a circuit board 70 mounted on the mid-frame assembly 60, a battery 80 mounted on the mid-frame assembly 60, and a rear cover 90 that is snapped onto the other side of the mid-frame assembly 60.

[0091] The display screen 50 can be a liquid crystal display (LCD) or an organic light-emitting diode (OLED) display screen, etc., for displaying information and images.

[0092] The mid-frame assembly 60 can be made of metals such as magnesium alloy, aluminum alloy, and stainless steel, but it is not limited to these materials and can also be made of other materials. The mid-frame assembly 60 can be placed between the display screen 50 and the back cover 90. The mid-frame assembly 60 can be used to support the display screen 50. The mid-frame assembly 60 and the back cover 90 are fastened together to form the outer contour of the electronic device 1500, and form a receiving cavity inside. The receiving cavity can be used to accommodate electronic components such as the camera, circuit board 70, battery 80, processor, and various types of sensors in the electronic device 1500.

[0093] The circuit board 70 is installed within the receiving cavity and can be installed in any position within the cavity. The processor of the electronic device 1500 can be located on the circuit board 70. The circuit board 70 can also integrate one, two, or more functional components such as a motor, microphone, speaker, receiver, headphone jack, universal serial bus interface (USB interface), camera, proximity sensor, ambient light sensor, and gyroscope. Meanwhile, the display screen 50 can be electrically connected to the circuit board 70.

[0094] The battery 80 is installed within a housing cavity, and can be installed in any position within the housing cavity. The battery 80 can be electrically connected to the main circuit board 70 to power the electronic device 1500. The main circuit board 70 may be equipped with a power management circuit. The power management circuit is used to distribute the voltage provided by the battery 80 to various electronic components in the electronic device 1500, such as the display screen 50.

[0095] The back cover 90 can be made of the same material as the mid-frame assembly 60, or other materials. The back cover 90 can be integrally formed with the mid-frame assembly 60. In some embodiments, the back cover 90 can wrap around the mid-frame assembly 60 and support the display screen 50. Structures such as a rear camera hole and a fingerprint recognition module mounting hole can be formed on the back cover 90.

[0096] 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.

[0097] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of this patent 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 module, characterized in that, The antenna module includes a first radiator, a second radiator, and a first matching circuit; the first radiator includes a first radiating stub and a second radiating stub that are connected to each other and arranged in different directions, and there is a coupling gap between the first end of the first radiating stub and the first end of the second radiator. A power supply point and a first connection point are sequentially provided on the first radiating stub along the direction from the first end to the second end connected to the second radiating stub. The power supply point is connected to the signal source, and the first connection point is connected to the first matching circuit. The first matching circuit includes a grounding branch that is directly connected to the ground. The grounding branch is turned on when the antenna module is operating in the first frequency band to support the radiating stub between the first connection point and the first end of the first radiating stub and the second radiator to cover the first frequency band through resonance corresponding to the zero-order mode.

2. The antenna module according to claim 1, characterized in that, The grounding branch is turned on when the antenna module is operating in the second frequency band, so as to support the second radiator to operate in the second frequency band under the excitation of the signal source.

3. The antenna module according to claim 2, characterized in that, The first matching circuit further includes a first matching branch, which is turned on when the antenna module is operating in the third frequency band, so as to support the first end of the first radiating stub from the feed point and the second radiating stub to operate in the third frequency band under the excitation of the signal source.

4. The antenna module according to claim 3, characterized in that, The first matching circuit includes a first gating switch connected to the grounding branch and the first matching branch; The first selection switch is used to turn on the grounding branch when the antenna module is operating in the first frequency band and the second frequency band; The first gating switch is also used to activate the first matching branch when the antenna module is operating in the third frequency band, so as to use the first matching branch to tune the third frequency band.

5. The antenna module according to claim 2, characterized in that, The second radiator is provided with a second connection point, and the antenna module further includes a second matching circuit connected to the second connection point; the second matching circuit includes a second gating switch, a second matching branch, and a third matching branch; The second matching branch is used to tune the first frequency band when the gating switch is turned on and the third matching branch is activated; The third matching branch is used to tune the second frequency band when the gating switch is turned on.

6. The antenna module according to claim 1, characterized in that, The second end of the second radiator is grounded.

7. The antenna module according to any one of claims 1 to 6, characterized in that, The first radiator is L-shaped.

8. The antenna module according to any one of claims 3 to 6, characterized in that, The first frequency band is a mid-frequency band, the second frequency band is a high-frequency band, and the third frequency band is a low-frequency band.

9. The antenna module according to any one of claims 1 to 6, characterized in that, The first radiator covers the target communication interface; the second radiator is located on one side of the target communication interface.

10. The antenna module according to any one of claims 1 to 6, characterized in that, The first radiator and the second radiator are metallic radiators; or, the first radiator and the second radiator are FPC radiators.

11. A mid-frame component, characterized in that, The mid-frame assembly includes the antenna module as described in any one of claims 1 to 10, and the mid-frame assembly further includes: The substrate includes the signal source and the ground plane; A frame surrounds the substrate, and the first and second radiators of the antenna module are disposed on the frame.

12. An electronic device, characterized in that, The electronic device includes the mid-frame assembly as described in claim 11.

13. The electronic device according to claim 12, characterized in that, The frame assembly includes a first frame and a second frame that are interconnected and arranged around the small board of the electronic device. The first radiating branch is formed by a first part of the first border, the second radiating branch is formed by a first part of the second border, and the second radiator is formed by a second part of the first border.

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