Middle frame assembly and electronic equipment
By setting gaps and multiple feed points on the top edge of the mid-frame, combined with matching and isolation circuits, the problem of unstable antenna performance was solved, achieving stable radiation and efficient modulation of multi-band signals, and promoting the miniaturization and reliability of electronic devices.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- BEIJING XIAOMI MOBILE SOFTWARE CO LTD
- Filing Date
- 2025-04-07
- Publication Date
- 2026-05-08
AI Technical Summary
In existing technologies, when using metal frames to design multi-band antennas, the antenna performance is unstable, difficult to adjust, and prone to mutual interference.
A slit is set on the top edge of the middle frame to form the first antenna radiator, and different radio frequency terminals are connected through multiple feed points and matching circuits to realize the radiation of multi-band signals, and the coupling between frequency bands is reduced through isolation circuits.
It improves the stability and efficiency of antenna performance, reduces space occupation, facilitates the miniaturization of electronic devices, and reduces production costs.
Smart Images
Figure CN224218620U_ABST
Abstract
Description
Technical Field
[0001] This disclosure relates to the field of electronic devices, and more particularly to a mid-frame assembly and an electronic device. Background Technology
[0002] As electronic devices become increasingly miniaturized, more and more devices are incorporating multi-band antenna designs within the metal frame of their mid-frames. However, this method of using metal frames to implement multi-band antenna designs suffers from antenna performance instability. Utility Model Content
[0003] To overcome the problems existing in the related technologies, this disclosure provides a mid-frame component and an electronic device.
[0004] According to a first aspect of this disclosure, a mid-frame assembly is provided, the mid-frame assembly comprising: a mid-frame including a support portion and a top border surrounding the support portion, the border including a top border having a slit, the top border located on one side of the slit constituting a first antenna radiator, the first antenna radiator having a first feed point, a second feed point and a first ground point spaced apart; a first matching circuit, a first terminal of the first matching circuit being connected to a first radio frequency terminal, a second terminal of the first matching circuit being connected to the first feed point, the first matching circuit being configured to enable the first antenna radiator to radiate a radiated signal of at least a first frequency band; and a second matching circuit, a first terminal of the second matching circuit being connected to a second radio frequency terminal, a second terminal of the second matching circuit being connected to the second feed point, the second matching circuit being configured to enable the first antenna radiator to radiate a radiated signal of at least a second frequency band, the second frequency band being different from the first frequency band.
[0005] In some embodiments of this disclosure, the first matching circuit includes a first capacitor, a first inductor, and a second capacitor. The first capacitor and the first inductor are connected in series between the first RF terminal and the first feed point. One end of the second capacitor is connected between the first capacitor and the first inductor, and the other end of the second capacitor is grounded.
[0006] In some embodiments of this disclosure, the mid-frame component further includes: a first isolation circuit, the first isolation circuit being connected to the first matching circuit, the first isolation circuit being used to achieve isolation between the first matching circuit and the second matching circuit.
[0007] In some embodiments of this disclosure, the first isolation circuit includes: a first passive device, one end of which is connected between the first inductor and the first capacitor, and the other end of which is grounded.
[0008] In some embodiments of this disclosure, the first frequency band is the WiFi 5G frequency band, the first passive device is a second inductor, and the inductance value of the second inductor is 1n to 1.5n.
[0009] In some embodiments of this disclosure, the second matching circuit includes a third capacitor connected in series between the second RF terminal and the second feed point.
[0010] In some embodiments of this disclosure, the mid-frame component further includes a second isolation circuit connected to the second matching circuit, the second isolation circuit being used to achieve isolation between the first matching circuit and the second matching circuit.
[0011] In some embodiments of this disclosure, the second isolation circuit includes: a second passive device, one end of which is connected between the third capacitor and the second feed point, and the other end of which is grounded.
[0012] In some embodiments of this disclosure, the second frequency band is the GPS L5 band, the second passive device is a fourth capacitor, and the capacitance value of the fourth capacitor is 6p to 7p.
[0013] In some embodiments of this disclosure, the second power supply point is located between the first power supply point and the first grounding point, and the first power supply point is closer to the fracture than the second power supply point.
[0014] In some embodiments of this disclosure, the top frame located on the other side of the seam constitutes a second antenna radiator, and the length of the second antenna radiator is less than the length of the first antenna radiator. The second antenna radiator is used to radiate at least one third frequency band, which is different from the first and second frequency bands.
[0015] In some embodiments of this disclosure, the second antenna radiator is provided with a third feed point and a second ground point. The third feed point is located between the gap and the second ground point. The third feed point is connected to a third radio frequency terminal. The third radio frequency terminal is used to radiate at least one of the third frequency bands.
[0016] In some embodiments of this disclosure, the mid-frame assembly further includes a third matching circuit connected to the second antenna radiator, the third matching circuit being used to adjust the equivalent stub lengths of the first frequency band and the third frequency band.
[0017] In some embodiments of this disclosure, the third matching circuit includes a fifth capacitor, one end of which is connected between the gap and the third feed point, and the other end of which is grounded.
[0018] In some embodiments of this disclosure, at least one of the third frequency bands includes the WiFi 2.4G frequency band and the GPS L1 frequency band.
[0019] According to a second aspect of this disclosure, an electronic device is provided, the electronic device including a mid-frame assembly as described in the first aspect.
[0020] The technical solutions provided by the embodiments of this disclosure may include the following beneficial effects:
[0021] The mid-frame assembly disclosed herein features a slit in its top frame. The top frame portion located on one side of the slit forms a first antenna radiator. The first antenna radiator has a first feed point, a second feed point, and a first ground point spaced apart. The first feed point is connected to a first radio frequency (RF) terminal via a first matching circuit, ensuring that the first antenna radiator radiates signals in at least a first frequency band. The second feed point is connected to a second RF terminal via a second matching circuit, ensuring that the second antenna radiator radiates signals in at least a second frequency band, which is different from the first frequency band. This not only allows the top frame to radiate antenna signals in multiple different frequency bands but also facilitates adjustment of the antenna efficiency for each frequency band, improving both the efficiency and stability of the antenna performance.
[0022] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and are not intended to limit this disclosure. Attached Figure Description
[0023] The accompanying drawings, which are incorporated in and form a part of this specification, illustrate embodiments consistent with this disclosure and, together with the description, serve to explain the principles of this disclosure.
[0024] Figure 1 This is a schematic diagram of the structure of a mid-frame component according to an exemplary embodiment;
[0025] Figure 2 This is a structural schematic diagram of a mid-frame component according to another exemplary embodiment;
[0026] Figure 3 This is an antenna S-parameter diagram of an electronic device according to an exemplary embodiment;
[0027] Figure 4 This is a diagram of the antenna radiation efficiency of an electronic device according to an exemplary embodiment.
[0028] In the picture:
[0029] 10-Mid-frame assembly; 11-Top border; 111-First feed point; 112-Second feed point; 113-First ground point; 114-Third feed point; 115-Second ground point; 116-Rib; 117-Gap; 118-First antenna radiator; 119-Second antenna radiator; 12-First matching circuit; 121-First capacitor; 122-First inductor; 123-Second capacitor; 124-First RF terminal; 13-Second matching circuit; 131-Third capacitor; 132-Second RF terminal; 14-First isolation circuit; 141-Second inductor; 15-Second isolation circuit; 151-Fourth capacitor. Detailed Implementation
[0030] Exemplary embodiments will now be described in detail, examples of which are illustrated in the accompanying drawings. When the following description relates to the drawings, unless otherwise indicated, the same numerals in different drawings denote the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with this disclosure. Rather, they are merely examples of apparatuses and methods consistent with some aspects of this disclosure as detailed in the appended claims.
[0031] As electronic devices become increasingly miniaturized, more and more devices are implementing multi-band antenna designs on the metal frame of the mid-frame. However, the method of implementing multi-band antenna designs using a metal frame in related technologies suffers from poor antenna performance. For example, in related electronic devices, only one feed point is set on the mid-frame frame, which is connected to the RF terminal via a matching circuit. The matching circuit is tuned to allow the frame to radiate signals of two frequency bands. However, this method increases the difficulty of adjusting the antenna radiation efficiency and can easily lead to unstable antenna performance.
[0032] To address the aforementioned technical issues, this disclosure provides a mid-frame assembly with a slit in the top frame. The top frame portion located on one side of the slit forms a first antenna radiator. The first antenna radiator has a first feed point, a second feed point, and a first ground point spaced apart. The first feed point is connected to a first radio frequency (RF) terminal via a first matching circuit, ensuring that the first antenna radiator radiates at least a first frequency band. The second feed point is connected to a second RF terminal via a second matching circuit, ensuring that the second antenna radiator radiates at least a second frequency band, which is different from the first frequency band. This not only allows the top frame to radiate antenna signals from multiple different frequency bands but also facilitates adjustment of the antenna efficiency for each frequency band, improving both the efficiency and stability of the antenna performance.
[0033] An exemplary embodiment of this disclosure provides a mid-frame component, such as Figure 1 and Figure 2As shown, the mid-frame assembly 10 includes a mid-frame, a first matching circuit 12, and a second matching circuit 13. The mid-frame includes a support portion and a frame surrounding the support portion. The frame includes a top frame 11, on which a slit 117 is provided. The top frame 11 located on one side of the slit 117 constitutes a first antenna radiator 118.
[0034] A first feed point 111, a second feed point 112, and a first ground point 113 are spaced apart on the first antenna radiator 118. The first ground point 113 can be grounded via a capacitor, the capacitance of which can be, for example, 33pF. The first terminal of the first matching circuit 12 is connected to the first radio frequency terminal 124, and the second terminal of the first matching circuit 12 is connected to the first feed point 111. The first matching circuit 12 is used to enable the first antenna radiator 118 to radiate at least a first frequency band of radiated signals. For example, under the action of the first radio frequency terminal 124, the first antenna radiator 118 can radiate only the first frequency band of radiated signals, such as radiating the WiFi 5G frequency band. Alternatively, the first antenna radiator 118 can radiate the first frequency band of radiated signals while also radiating radiated signals of other frequency bands different from the first frequency band, such as the N78 frequency band.
[0035] The first terminal of the second matching circuit 13 is connected to the second radio frequency terminal 132, and the second terminal of the second matching circuit 13 is connected to the second feed point 112. The second matching circuit 13 is used to enable the first antenna radiator 118 to radiate at least a second frequency band, wherein the second frequency band is different from the first frequency band. For example, under the action of the second radio frequency terminal 132, the first antenna radiator 118 may only radiate a second frequency band, such as the GPS L5 band. Alternatively, the first antenna radiator 118 may radiate a second frequency band while also radiating a different frequency band, such as the GPS L1 band.
[0036] For example, if the second feed point 112 is located between the first ground point 113 and the first feed point 111, and the first feed point 111 is closer to the gap 117 than the first ground point 113, then by the above arrangement, the portion of the first antenna radiator 118 located between the first feed point 111 and the gap 117 can be used to radiate the first frequency band radiated signal, and the portion of the first antenna radiator 118 located between the second feed point 112 and the gap 117, and / or the portion of the first antenna radiator 118 located between the first ground point 113 and the gap 117 can be used to radiate the second frequency band radiated signal.
[0037] This configuration achieves several advantages. First, it allows the top frame 11 to radiate antenna signals across multiple frequency bands while minimizing its footprint within the electronic device, thus facilitating miniaturization. Simultaneously, the top frame 11 facilitates antenna signal transmission and reception, effectively enhancing antenna performance and reliability. Second, this configuration allows for easy adjustment of antenna efficiency across different frequency bands, optimizing efficiency and reducing interference between the first and second frequency bands, thereby improving antenna stability. Furthermore, this design, enabling the top frame 11 to radiate multi-band antenna signals, improves the structural integration of the middle frame assembly 10, simplifies its structure, and reduces manufacturing costs.
[0038] Combination Figure 2 In one embodiment, the first matching circuit 12 includes a first capacitor 121, a first inductor 122, and a second capacitor 123. The first capacitor 121 and the first inductor 122 are connected in series between the first RF terminal 124 and the first feed point 111. One end of the second capacitor 123 is connected between the first capacitor 121 and the first inductor 122, and the other end of the second capacitor 123 is grounded.
[0039] In this way, by adjusting the parameter values of the first capacitor 121, the first inductor 122, and the second capacitor 123, the radiated signal of the first frequency band can be tuned to achieve optimal radiation efficiency in the first frequency band, thereby improving the antenna performance of the electronic device. For example, the capacitance value of the first capacitor 121 is 2pF to 2.5pF, such as 2.4pF; the inductance value of the first inductor 122 is 1nF to 1.5nF, such as 1.3nF; and the capacitance value of the second capacitor 123 is 1pF to 1.5pF, such as 1.2pF.
[0040] Combination Figure 2 In one embodiment, the mid-frame assembly 10 further includes a first isolation circuit 14 connected to a first matching circuit 12. The first isolation circuit 14 is used to achieve isolation between the first matching circuit 12 and the second matching circuit 13, thereby reducing the coupling between the first frequency band and the second frequency band and further improving the antenna performance of the electronic device.
[0041] Combination Figure 2In one embodiment, the first isolation circuit 14 includes a first passive device, one end of which is connected between the first inductor 122 and the first capacitor 121, and the other end of which is grounded. Exemplarily, the first passive device may be an inductor, a capacitor, or an LC circuit composed of a capacitor and an inductor. This design simplifies the setup of the first isolation circuit 14 and facilitates production and processing.
[0042] Combination Figure 2 In one embodiment, the first frequency band is the WiFi 5G band. Since the WiFi 5G band has a high frequency, the first passive device uses a second inductor 141, and the inductance value of the second inductor 141 is 1n to 1.5n, for example, 1.2n. In this way, an equivalent short circuit is constructed through the first isolation circuit 14, thereby reducing the coupling between the first frequency band and the second frequency band and improving the antenna performance of the electronic device.
[0043] Combination Figure 2 In one embodiment, the second matching circuit 13 includes a third capacitor 131, which is connected in series between the second RF terminal 132 and the second feed point 112. Thus, the radiated signal of the second frequency band can be tuned by adjusting the capacitance value of the third capacitor 131, optimizing the radiation efficiency of the second frequency band and improving the antenna performance of the electronic device. For example, the third capacitor 131 can be 4pF to 5pF, such as 4.7pF.
[0044] Combination Figure 2 In one embodiment, the mid-frame assembly 10 further includes a second isolation circuit 15, which is connected to the second matching circuit 13. The second isolation circuit 15 is used to achieve isolation between the first matching circuit 12 and the second matching circuit 13, thereby further reducing the coupling between the first frequency band and the second frequency band, and further improving the antenna performance of the electronic device.
[0045] Combination Figure 2 In one embodiment, the second isolation circuit 15 includes a second passive device, one end of which is connected between the third capacitor 131 and the second feed point 112, and the other end of which is grounded. Exemplarily, the second passive device may be an inductor, a capacitor, or an LC circuit composed of a capacitor and an inductor. This design simplifies the setup of the second isolation circuit 15 and facilitates production and processing.
[0046] Combination Figure 2In one embodiment, the second frequency band is the GPS L5 band. Since the frequency of the GPS L5 band is relatively low, the second passive device uses a fourth capacitor 151, and the capacitance value of the fourth capacitor 151 is 6pF to 7pF, for example, 6.4pF. In this way, an equivalent short circuit is constructed through the second isolation circuit 15, thereby further reducing the coupling between the first and second frequency bands and improving the antenna performance of the electronic device.
[0047] Combination Figure 1 In one embodiment, the second feed point 112 is located between the first feed point 111 and the first ground point 113, with the first feed point 111 being closer to the fracture 117 than the second feed point 112. This arrangement ensures that the equivalent stub lengths of the first and second frequency bands are within a suitable range, thereby improving the radiation efficiency of both bands.
[0048] Combination Figure 1 and Figure 2 In one embodiment, the top frame 11 located on the other side of the gap 117 constitutes a second antenna radiator 119, and the length of the second antenna radiator 119 is less than the length of the first antenna radiator 118. The second antenna radiator 119 is used to radiate at least one third frequency band, which is different from the first and second frequency bands. Exemplarily, the second antenna radiator 119 may be capable of radiating only one third frequency band, or it may radiate multiple third frequency bands, and these multiple third frequency bands are different from the first and second frequency bands. For example, the first frequency band is the WiFi 5G band, the second frequency band is the GPS L5 band, and the third frequency band is the WiFi 2.4G band and / or the GPS L1 band.
[0049] This configuration allows the top bezel 11 to radiate antenna signals across more frequency bands, facilitating the implementation of more functions in the electronic device while saving internal space. This promotes miniaturization and improves the user experience. Furthermore, using the longer branch of the first antenna radiator to radiate the WiFi 5G and GPS L5 bands enhances their radiation efficiency, thereby improving antenna performance stability.
[0050] In one embodiment, the second antenna radiator 119 is provided with a third feed point 114 and a second ground point 115. The third feed point 114 is located between the gap 117 and the second ground point 115, and is connected to a third radio frequency (RF) terminal. The third RF terminal is used to radiate at least one third frequency band. The portion of the second antenna radiator 119 located between the third feed point 114 and the gap 117 can be used to radiate a third frequency band, while the portion between the third feed point 114 and the second ground point 115 can be used to radiate another third frequency band. Exemplarily, under the action of the third RF terminal, the second antenna radiator 119 can radiate only one third frequency band, such as the WiFi 2.4G band. Alternatively, the second antenna radiator 119 can radiate multiple third frequency bands, and these multiple third frequency bands are different, for example, the WiFi 2.4G band and the GPS L1 band, respectively. No specific limitation is made in this regard.
[0051] This design allows the top frame 11 to radiate antenna signals across more frequency bands while improving the structural integration of the middle frame assembly 10. Furthermore, it simplifies the structure of the middle frame assembly 10, making it easier to manufacture and process while also reducing production costs.
[0052] In one embodiment, the mid-frame assembly 10 further includes a third matching circuit connected to the second antenna radiator 119. The third matching circuit is used to adjust the equivalent stub lengths of the first and third frequency bands. This configuration reduces the difficulty of adjusting the radiation efficiency of the first and third frequency bands. The equivalent stub lengths of the first and third frequency bands can be adjusted via the third matching circuit to ensure that both bands are at their optimal radiation efficiency. This allows for adjustment of the radiation efficiency of the first and third frequency bands without changing the frame size, providing testers with adjustable flexibility and thus improving the production efficiency of the mid-frame assembly 10.
[0053] In one embodiment, the third matching circuit includes a fifth capacitor, one end of which is connected between the gap 117 and the third feed point 114, such as... Figure 1As shown, for example, it can be connected to the rib 116 of the second antenna radiator 119, with the other end of the fifth capacitor grounded. The radiation efficiency of the first and third frequency bands can then be adjusted by changing the capacitance value of the fifth capacitor. For example, using a larger capacitance value allows current to flow through the fifth capacitor, resulting in a longer equivalent stub length for the first frequency band and a shorter equivalent stub length for the third frequency band. Using a smaller capacitance value, such as 0.3pF, prevents current from flowing through the fifth capacitor, causing the third matching circuit to operate in an open-circuit state, thus increasing the equivalent stub length for the third frequency band and shortening the equivalent stub length for the first frequency band. This design simplifies the structure of the third matching circuit, making it easier to manufacture and process.
[0054] In one embodiment, at least one third frequency band includes a WiFi 2.4G band and a GPS L1 band. This allows the top bezel 11 to achieve high-performance dual-band GPS communication while simultaneously providing high-performance WiFi communication, effectively improving the navigation accuracy and communication performance of the electronic device and further enhancing its reliability. In this embodiment, a first antenna radiator with a longer branch length located on the top bezel 11 can be used to radiate the WiFi 5G band and the GPS L5 band, while a second antenna radiator 119 with a shorter branch length can be used to radiate the WiFi 2.4G band and the GPS L1 band, thereby improving the radiation efficiency of each frequency band and enhancing the antenna performance of the electronic device.
[0055] Testing showed that the above configuration allows the top bezel 11 to support WiFi 5G, GPS L5, WiFi 2.4G, and GPS L1 bands. Figure 3 and Figure 4 As can be seen, all frequency bands exhibit excellent radiation performance. Combined with the test records in Table 1 below, the GPS L1 radiation efficiency is above -3.5 dB, and the GPS L5 radiation efficiency is -9 dB. Among these, in... Figure 3 and Figure 4 In the diagram, points 1 and 2 represent the WiFi 5G band, point 3 represents the GPS L1 band, points 4 and 5 represent the WiFi 2.4G band, and point 6 represents the GPS L5 band.
[0056] Table 1
[0057] frequency band Radiative efficiency / dB GPS L1 -2.8 GPS L5 -9.0 WiFi 2.4G -3.5 WiFi 5G -2.6
[0058] In one embodiment, the first feed point 111, the second feed point 112, the third feed point 114, the first ground point 113, and the second ground point 115 can each be formed by multiple ribs on the top frame 11. Simultaneously, the second antenna radiator 119 can also be connected to the third matching circuit through these ribs. This simplifies the structure of the mid-frame assembly 10, making it easier to manufacture and process.
[0059] An exemplary embodiment of this disclosure provides an electronic device, which may be a mobile device such as a mobile phone (e.g., a foldable phone), a tablet computer, a laptop computer, a handheld computer, an in-vehicle electronic device, a wearable device, an ultra-mobile personal computer (UMPC), a netbook, or a personal digital assistant (PDA), or a non-mobile device such as a personal computer (PC) or a television (TV).
[0060] The electronic device includes the mid-frame assembly 10 as described above. For example... Figure 1 and Figure 2 As shown, the mid-frame assembly 10 includes a mid-frame, a first matching circuit 12, and a second matching circuit 13. The mid-frame includes a support portion and a frame surrounding the support portion. The frame includes a top frame 11 with a slit 117. The top frame 11 located on one side of the slit 117 forms a first antenna radiator 118. A first feed point 111, a second feed point 112, and a first ground point 113 are spaced apart on the first antenna radiator 118. The first end of the first matching circuit 12 is connected to a first radio frequency terminal 124, and the second end of the first matching circuit 12 is connected to the first feed point 111. The first matching circuit 12 is used to enable the first antenna radiator 118 to radiate at least a first frequency band of radiated signals. The first end of the second matching circuit 13 is connected to a second radio frequency terminal 132, and the second end of the second matching circuit 13 is connected to the second feed point 112. The second matching circuit 13 is used to enable the first antenna radiator 118 to radiate at least a second frequency band of radiated signals, and the second frequency band is different from the first frequency band.
[0061] This configuration achieves several advantages. First, it allows the top frame 11 to radiate antenna signals across multiple frequency bands while minimizing its footprint within the electronic device, thus facilitating miniaturization. Simultaneously, the top frame 11 facilitates antenna signal transmission and reception, effectively enhancing antenna performance and reliability. Second, this configuration allows for easy adjustment of antenna efficiency across different frequency bands, optimizing efficiency and reducing interference between the first and second frequency bands, thereby improving antenna stability. Furthermore, this design, enabling the top frame 11 to radiate multi-band antenna signals, improves the structural integration of the middle frame assembly 10, simplifies its structure, and reduces manufacturing costs.
[0062] Other embodiments of this disclosure will readily occur to those skilled in the art upon consideration of the specification and practice of the invention disclosed herein. This application is intended to cover any variations, uses, or adaptations of this disclosure that follow the general principles of this disclosure and include common knowledge or customary techniques in the art not disclosed herein. The specification and examples are to be considered exemplary only, and the true scope and spirit of this disclosure are indicated by the following claims.
[0063] It should be understood that this disclosure is not limited to the precise structures described above and shown in the accompanying drawings, and various modifications and changes can be made without departing from its scope. The scope of this disclosure is limited only by the appended claims.
Claims
1. A mid-frame component, characterized in that, The mid-frame component includes: The middle frame includes a support portion and a frame surrounding the support portion. The frame includes a top frame with a slit. The top frame located on one side of the slit forms a first antenna radiator. A first feed point, a second feed point, and a first ground point are spaced apart on the first antenna radiator. A first matching circuit, wherein a first end of the first matching circuit is connected to a first radio frequency terminal, and a second end of the first matching circuit is connected to the first feed point, and the first matching circuit is used to enable the first antenna radiator to radiate at least a first frequency band of radiated signal. The second matching circuit has a first end connected to the second radio frequency terminal and a second end connected to the second feed point. The second matching circuit is used to enable the first antenna radiator to radiate at least a second frequency band, which is different from the first frequency band.
2. The mid-frame assembly according to claim 1, characterized in that, The first matching circuit includes a first capacitor, a first inductor, and a second capacitor. The first capacitor and the first inductor are connected in series between the first RF terminal and the first feed point. One end of the second capacitor is connected between the first capacitor and the first inductor, and the other end of the second capacitor is grounded.
3. The mid-frame assembly according to claim 2, characterized in that, The mid-frame component also includes: A first isolation circuit is connected to the first matching circuit, and the first isolation circuit is used to achieve isolation between the first matching circuit and the second matching circuit.
4. The mid-frame assembly according to claim 3, characterized in that, The first isolation circuit includes: The first passive device has one end connected between the first inductor and the first capacitor, and the other end grounded.
5. The mid-frame assembly according to claim 4, characterized in that, The first frequency band is the WiFi 5G frequency band, the first passive device is the second inductor, and the inductance value of the second inductor is 1n to 1.5n.
6. The mid-frame assembly according to claim 1, characterized in that, The second matching circuit includes: The third capacitor is connected in series between the second RF terminal and the second feed point.
7. The mid-frame assembly according to claim 6, characterized in that, The mid-frame component also includes: A second isolation circuit is connected to the second matching circuit, and the second isolation circuit is used to achieve isolation between the first matching circuit and the second matching circuit.
8. The mid-frame assembly according to claim 7, characterized in that, The second isolation circuit includes: The second passive device has one end connected between the third capacitor and the second feed point, and the other end grounded.
9. The mid-frame assembly according to claim 8, characterized in that, The second frequency band is the GPS L5 band, the second passive device is the fourth capacitor, and the capacitance value of the fourth capacitor is 6pF to 7pF.
10. The mid-frame assembly according to any one of claims 1 to 9, characterized in that, The second power supply point is located between the first power supply point and the first grounding point, and the first power supply point is closer to the fracture than the second power supply point.
11. The mid-frame assembly according to any one of claims 1 to 9, characterized in that, The top frame located on the other side of the fracture constitutes a second antenna radiator, and the length of the second antenna radiator is less than the length of the first antenna radiator. The second antenna radiator is used to radiate at least one third frequency band, which is different from the first and second frequency bands.
12. The mid-frame assembly according to claim 11, characterized in that, The second antenna radiator is provided with a third feed point and a second ground point. The third feed point is located between the gap and the second ground point. The third feed point is connected to a third radio frequency terminal. The third radio frequency terminal is used to radiate at least one of the third frequency bands.
13. The mid-frame assembly according to claim 12, characterized in that, The mid-frame component also includes: A third matching circuit is connected to the second antenna radiator, and the third matching circuit is used to adjust the equivalent stub lengths of the first frequency band and the third frequency band.
14. The mid-frame assembly according to claim 13, characterized in that, The third matching circuit includes: The fifth capacitor has one end connected between the break and the third power supply point, and the other end grounded.
15. The mid-frame assembly according to claim 11, characterized in that, At least one of the third frequency bands includes the WiFi 2.4G band and the GPS L1 band.
16. An electronic device, characterized in that, The electronic device includes a mid-frame assembly as described in any one of claims 1 to 15.