Antenna module, middle frame assembly and electronic equipment

Abstract

The invention relates to an antenna module, a middle frame assembly and electronic equipment. The antenna module comprises a first radiator, a second radiator and a third radiator, the second radiator is arranged between the first radiator and the third radiator, and the distance between the first radiator and the third radiator is greater than a preset distance threshold; the first radiator, the second radiator and the third radiator respectively support the antenna module to work in a first frequency band, a second frequency band and a third frequency band; wherein the third frequency band is an N78 frequency band, an N77 frequency band or an N79 frequency band; the second frequency band is an MHB frequency band or a WiFi 2.4 G frequency band; the first frequency band is an LB frequency band. According to the antenna module, the isolation degree between the first radiator and the third radiator can be improved, and then the performance of the antenna module is ensured.

Description

Technical Field

[0001] The present application relates to the field of communication technology, and in particular to an antenna module, a middle frame assembly and an electronic device. Background Art

[0002] An antenna module is often provided in an electronic device (such as a mobile phone), wherein the antenna module may include multiple radiators to support multiple frequency bands such as LB, MHB and N78.

[0003] However, currently, in the antenna module supporting the LB, MHB and N78 frequency bands, the isolation performance between the radiator supporting the LB band and the radiator supporting the N78 band is poor, which affects the performance of the antenna module. Summary of the invention

[0004] Based on this, it is necessary to provide an antenna module, a middle frame assembly and an electronic device to address the above technical problems.

[0005] In a first aspect, the present application provides an antenna module, comprising: a first radiator, a second radiator and a third radiator, wherein the second radiator is arranged between the first radiator and the third radiator, and the distance between the first radiator and the third radiator is greater than a preset distance threshold; the first radiator, the second radiator and the third radiator respectively support the antenna module to operate in a first frequency band, a second frequency band and a third frequency band; wherein the third frequency band is an N78 band, an N77 band or an N79 band; the second frequency band is an MHB band or a WiFi 2.4G band; and the first frequency band is an LB band.

[0006] In one embodiment, there is a gap between the first end of the second radiator and the first end of the first radiator, the second end of the second radiator and the first end of the third radiator are both grounded at a first grounding position, the second end of the third radiator is a free end, the first radiator is grounded at a second grounding position, and the second grounding position is located around the second end of the first radiator.

[0007] In one embodiment, the feeding point on the second radiator is located between the first end of the second radiator and the second end of the second radiator; the feeding point on the third radiator is located around the second end of the third radiator; and the feeding point on the first radiator is located around the first end of the first radiator.

[0008] In one embodiment, the distance between the first radiator and the third radiator is greater than or equal to 16 mm and less than or equal to 24 mm.

[0009] In one of the embodiments, the distance between the first radiator and the third radiator is 22 mm.

[0010] In one embodiment, a filtering material is disposed around the first grounding position to block the influence of the annular mode generated by the first radiator on the third radiator.

[0011] In one embodiment, the filter material is grounded foam.

[0012] In a second aspect, a middle frame assembly is provided, wherein the middle frame assembly is provided with an antenna module as described in any one of the first aspects above, and the middle frame assembly also includes: a substrate, provided with a ground plane and a feed source of the antenna module; and a frame, arranged around the substrate, and the first radiator, the second radiator and the third radiator in the antenna module are arranged on the frame.

[0013] In one embodiment, the first radiator, the second radiator and the third radiator are disposed in a side area of ​​the frame.

[0014] In a third aspect, an electronic device is provided, comprising a middle frame assembly, a display screen and a back cover as described in any one of the second aspects, wherein the display screen is arranged on one side of the middle frame assembly, and the back cover is arranged on the other side of the middle frame assembly and forms a accommodating cavity with the middle frame assembly.

[0015] The present application provides an antenna module comprising a first radiator, a second radiator and a third radiator, wherein the second radiator is arranged between the first radiator and the third radiator, and the distance between the first radiator and the third radiator is greater than a preset distance threshold, and the first radiator, the second radiator and the third radiator respectively support the antenna module to operate in a first frequency band, a second frequency band and a third frequency band; wherein the third frequency band is an N78 band, an N77 band or an N79 band, the second frequency band is an MHB band or a WiFi 2.4G band, and the first frequency band is an LB band, so that the first radiator and the third radiator can be physically isolated, and the distance between the first radiator and the third radiator is greater than the preset distance threshold, thereby improving the isolation between the first radiator and the third radiator, and then ensuring the performance of the antenna module. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present application or related technologies, the drawings required for use in the embodiments of the present application or related technical descriptions will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0017] Figure 1 A schematic diagram of an antenna module provided for related technology;

[0018] Figure 2 It is a schematic diagram of the return loss curve corresponding to the antenna module;

[0019] Figure 3 It is a schematic diagram of the return loss curve corresponding to the antenna module;

[0020] Figure 4 A schematic diagram of an antenna module provided in an embodiment of the present application;

[0021] Figure 5 It is a schematic diagram of the return loss curve corresponding to the antenna module;

[0022] Figure 6 It is a schematic diagram of the return loss curve corresponding to the antenna module;

[0023] Figure 7 is a schematic diagram of current distribution;

[0024] Figure 8 is a schematic diagram of current distribution;

[0025] Fig. 9 It is a schematic diagram of the return loss curve corresponding to the antenna module;

[0026] Fig.10 It is a schematic diagram of the return loss curve corresponding to the antenna module;

[0027] Fig.11 is a schematic diagram of current distribution;

[0028] Fig.12 A schematic diagram of an electronic device provided in an embodiment of the present application;

[0029] Fig.13 A schematic diagram of a middle frame assembly provided in an embodiment of the present application. DETAILED DESCRIPTION

[0030] In order to make the purpose, technical solution and advantages of the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0031] It should be understood that, in the description of the present application, the terms indicating orientation or positional relationship are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0032] In this application, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0033] In the present application, unless otherwise clearly specified and limited, a first feature being “above” or “below” a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being “above”, “above”, and “above” a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being “below”, “below”, and “below” a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0034] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used herein are for illustrative purposes only and are not intended to be the only implementation method.

[0035] Currently, electronic devices (such as mobile phones) are often equipped with antenna modules, wherein the antenna module may include multiple radiators to support multiple frequency bands such as LB, MHB and N78. Figure 1 , which shows a schematic diagram of an antenna module provided by the related technology.

[0036] like Figure 1 As shown, the antenna module includes a radiator 101 and a radiator 102, wherein a gap is provided between a first end of the radiator 101 and a first end of the radiator 102, the radiator 101 is grounded at a second end, and the radiator 102 is grounded at a second end, the radiator 101 supports the antenna module to operate in the LB band, and the radiator 102 supports the antenna module to operate in the MHB band and the N78 band. In other words, the MHB band and the N78 band of the antenna module are supported by a dual-feed shared radiator, such as Figure 1 As shown, the radiator 101 and the radiator 102 are in a head-to-head arrangement.

[0037] Please refer to Figure 2 and Figure 3 , Figure 1 The antenna module shown has poor isolation after matching, only -10dB, which will affect the performance of the antenna module.

[0038] In view of this, an embodiment of the present application provides an antenna module, which includes a first radiator, a second radiator and a third radiator, wherein the second radiator is arranged between the first radiator and the third radiator, and the distance between the first radiator and the third radiator is greater than a preset distance threshold, and the first radiator, the second radiator and the third radiator respectively support the antenna module to operate in a first frequency band, a second frequency band and a third frequency band; wherein the third frequency band is an N78 band, an N77 band or an N79 band, the second frequency band is an MHB band or a WiFi 2.4G band, and the first frequency band is an LB band. In this way, the first radiator and the third radiator can be physically isolated, and the distance between the first radiator and the third radiator is greater than the preset distance threshold, thereby improving the isolation between the first radiator and the third radiator, thereby ensuring the performance of the antenna module.

[0039] It should be noted that the antenna module provided in the embodiments of the present application can be arranged in an electronic device, and the "electronic device" (also referred to as a "terminal" or "mobile terminal" or "electronic device") includes a device for receiving / sending 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 can combine cellular radio telephones with data processing, fax and data communication capabilities; PDAs that can include radio telephones, pagers, Internet / intranet access, web browsers, notepads, calendars and / or global positioning system (GPS) receivers; and conventional laptop and / or palmtop receivers or other electronic devices including radiotelephone transceivers.

[0040] Exemplarily, the electronic device may be a mobile phone, and the antenna module provided in the embodiment of the present application may be arranged at the side of the mobile phone. It should be noted that the antenna module provided in the embodiment of the present application may also be arranged at other positions of the mobile phone, and the embodiment of the present application does not specifically limit this.

[0041] Please refer to Figure 4, which shows a schematic diagram of an antenna module 400 provided in an embodiment of the present application. It should be noted that the antenna module 400 can be a mixture of one or more of a flexible printed circuit (FPC) antenna, a laser direct structuring (LDS) antenna, a print direct structuring (PDS) antenna, and a metal antenna. Of course, the antenna module 400 can also be other types of antennas, which will not be described in detail in the embodiment of the present application.

[0042] like Figure 4 As shown, the antenna module 400 may include: a first radiator 401, a second radiator 402 and a third radiator 403, wherein the second radiator 402 is disposed between the first radiator 401 and the third radiator 403, and the distance between the first radiator 401 and the third radiator 403 is greater than a preset distance threshold. The first radiator 401, the second radiator 402 and the third radiator 403 respectively support the antenna module 400 to operate in the first frequency band, the second frequency band and the third frequency band; wherein the third frequency band is the N78 frequency band, the N77 frequency band or the N79 frequency band, the second frequency band is the MHB frequency band or the WiFi 2.4G frequency band, and the first frequency band is the LB frequency band.

[0043] Depend on Figure 4 It can be seen that in the antenna module 400 provided in the embodiment of the present application, the third frequency band and the second frequency band are no longer supported by a dual-feed shared radiator, but are split into two radiators, namely a third radiator 403 and a second radiator 402, wherein the third radiator 403 supports the third frequency band of the antenna module 400, and the second radiator 402 supports the second frequency band of the antenna module 400, and the third radiator 403 and the first radiator 401 are respectively arranged on both sides of the second radiator 402. In this way, compared with Figure 1 For the antenna module shown, the first radiator 401 and the third radiator 403 can be physically isolated, and the distance between the first radiator 401 and the third radiator 403 can be ensured to be greater than a preset distance threshold. Thus, the isolation between the first radiator 401 and the third radiator 403 can be improved, thereby ensuring the performance of the antenna module 400.

[0044] Please refer to Figure 4Optionally, in the antenna module 400 provided in the embodiment of the present application, there is a gap between the first end A2 of the second radiator 402 and the first end A1 of the first radiator 401, the second end B2 of the second radiator 402 and the first end A3 of the third radiator 403 are both grounded at the first grounding position J1, the second end B3 of the third radiator 403 is a free end, the first radiator 401 is grounded at the second grounding position J2, and the second grounding position J2 is located around the second end B1 of the first radiator 401.

[0045] In other words, in the antenna module 400 provided in the embodiment of the present application, the third radiator 403 and the second radiator 402 are grounded at the same position, and the first radiator 401 is grounded at a single position.

[0046] Please continue to refer to Figure 4 ,like Figure 4 As shown, optionally, in the antenna module 400 provided in an embodiment of the present application, the feeding point on the second radiator 402 is located between the first end A2 of the second radiator 402 and the second end B2 of the second radiator 402, the feeding point on the third radiator 403 is located around the second end B3 of the third radiator 403, and the feeding point on the first radiator 401 is located around the first end A1 of the first radiator 401.

[0047] In an optional embodiment of the present application, the distance between the first radiator 401 and the third radiator 403 is greater than or equal to 16 mm and less than or equal to 24 mm.

[0048] In an optional embodiment of the present application, the distance between the first radiator 401 and the third radiator 403 is 22 mm.

[0049] After simulation, please refer to Figure 5 and Figure 6 When the distance between the first radiator 401 and the third radiator 403 is the distance described above, the isolation between the first radiator 401 and the third radiator 403 can be improved from -10dB to -18.8dB, and the efficiency of the antenna module 400 in the N78 frequency band is improved by 3.5dB.

[0050] In addition, considering that in actual applications, the length of the radiator supporting the LB band is usually longer, the efficiency pit of the loop mode fed to the ground falls at 2.5GHz, which happens to fall in the B41 band in the MHB band. Therefore, it will affect the radiation of the antenna module in the MHB band, and also affect the isolation of the antenna module in the N78 band and the LB band. Readers can refer to this. Figure 2 and Figure 3 ,like Figure 2 and Figure 3As shown, due to the influence of the efficiency pit, the isolation is reduced by about 3db.

[0051] In the related technology, a capacitor branch can be set up, which is connected to the radiator supporting the LB band. By controlling the on and off of the capacitor in the capacitor branch, the efficiency pit can be adjusted to shift to a low frequency of 2.1 GHz, thereby reducing the impact on the radiation of the antenna module in the MHB band.

[0052] However, this method of the related technology will cause the antenna module to be in the LB band less frequently. Moreover, although the efficiency pit is adjusted to 2.1 GHz, it is still within the MHB band, which will still affect the radiation of the antenna module in the MHB band and cannot fundamentally solve the problem.

[0053] In fact, the antenna module 400 provided in the embodiment of the present application may also have the above-mentioned problem. By analyzing the current mode generated on the first radiator 401 when the third radiator 403 is working, the efficiency pit generated by the first radiator 401 is a loop mode of feeding to the return ground, as follows Figure 7 As shown, Figure 7 ANT1 in the embodiment is the first radiator 401. At the same time, a strong current is also induced on the screen, as shown below Figure 8 Further, please refer to Figure 5 and Figure 6 ,like Figure 5 and Figure 6 As shown, due to the efficiency pit of the loop mode of the first radiator 401, the isolation of the third radiator 403 is reduced by about 1-2 db.

[0054] To address this problem, the antenna module 400 provided in the embodiment of the present application may optionally be provided with a filtering material around the first grounding position J1 to block the influence of the annular mode generated by the first radiator 401 on the third radiator 403, so that the third radiator 403 is basically free of clutter and efficiency pits, and the efficiency of the third radiator 403 is further improved by 1.3dB, please refer to Fig. 9 and Fig.10 In an optional embodiment of the present application, the filter material is grounded foam. Fig.11 ,like Fig.11 As shown, compared with the current modes before and after adding the filter material, the loop mode of the first radiator 401 is significantly weakened.

[0055] In an optional embodiment of the present application, a middle frame assembly is further provided, wherein the middle frame assembly is provided with the antenna module 400 provided in the above embodiment, and in addition, the middle frame assembly further includes:

[0056] A substrate is provided with a ground plane and a feed source of the antenna module 400, wherein, optionally, a first ground point J1 and a second ground point J2 in the antenna module 400 are both connected to the ground plane of the substrate; and,

[0057] The frame is arranged around the substrate, and the first radiator 401 , the second radiator 402 and the third radiator 403 in the antenna module 400 are arranged on the frame.

[0058] In an optional embodiment of the present application, the first radiator 401 , the second radiator 402 and the third radiator 403 in the antenna module 400 are arranged in the side area of ​​the frame.

[0059] In an optional embodiment of the present application, an electronic device is also provided, wherein the electronic device includes a middle frame assembly, a display screen and a back cover as provided in the above embodiment, wherein the display screen is arranged on one side of the middle frame assembly, and the back cover is arranged on the other side of the middle frame assembly, and forms a accommodating cavity with the middle frame assembly.

[0060] The embodiment of the present application also provides an electronic device, which may include the antenna module 400 in the above embodiment. The electronic device may be a cellular phone, a smart phone, other wireless communication devices, a personal digital assistant, an audio player, other media players, a music recorder, a video recorder, a camera, other media recorders, a radio, a medical device, a calculator, a programmable remote control, a pager, a netbook computer, a personal digital assistant (PDA for short), a portable multimedia player (PMP for short), a moving picture expert group (MPEG-1 or MPEG-2 for short), an audio layer 3 (MP3 for short) player, a portable medical device, a digital camera, and a combination thereof.

[0061] Please refer to Fig.12 , Fig.12 1 is a schematic diagram of the structure of an electronic device 1200 in an embodiment of the present application. The electronic device 1200 may include a display screen 50 for displaying information, a middle frame assembly 60 for mounting the display screen 50 on one side, a circuit board 70 mounted on the middle frame assembly 60, a battery 80 mounted on the middle frame assembly 60, and a back cover 90 snap-fitted to the other side of the middle frame assembly 60.

[0062] The display screen 50 may be a liquid crystal display (LCD) or an organic light-emitting diode (OLED) display, etc., for displaying information and images.

[0063] The material of the middle frame assembly 60 can be a metal such as magnesium alloy, aluminum alloy, stainless steel, etc. Of course, the material is not limited thereto, and can also be other. The middle frame assembly 60 can be placed between the display screen 50 and the back cover 90. The middle frame assembly 60 can be used to carry the display screen 50. The middle frame assembly 60 and the back cover 90 are snap-fitted to form the outer contour of the electronic device 1200, and a receiving cavity is formed inside. The receiving cavity can be used to accommodate electronic components such as a camera, a circuit board 70, a battery 80, a processor, and various types of sensors in the electronic device 1200.

[0064] The circuit main board 70 is installed in the accommodating cavity and can be installed at any position in the accommodating cavity. The processor of the electronic device 1200 can be set on the circuit main board 70. The circuit main board 70 can also integrate one, two or more functional components such as a motor, a microphone, a speaker, a receiver, an earphone interface, a universal serial bus interface (USB interface), a camera, a distance sensor, an ambient light sensor, a gyroscope, etc. At the same time, the display screen 50 can be electrically connected to the circuit main board 70.

[0065] The battery 80 is installed in the accommodating cavity and can be installed at any position in the accommodating cavity. The battery 80 can be electrically connected to the circuit main board 70 so that the battery 80 can power the electronic device 1200. A power management circuit can be provided on the circuit main board 70. The power management circuit is used to distribute the voltage provided by the battery 80 to various electronic components in the electronic device 1200, such as the display screen 50.

[0066] The back cover 90 can be made of the same material as the middle frame assembly 60, or other materials. The back cover 90 can be integrally formed with the middle frame assembly 60. In some embodiments, the back cover 90 can wrap the middle frame assembly 60 and can carry the display screen 50. The back cover 90 can be formed with a rear camera hole, a fingerprint recognition module installation hole, and other structures.

[0067] Please refer to Fig.13 , Fig.13 for Figure 4 The schematic diagram of the structure in which the antenna module 400 of the embodiment shown is arranged on the middle frame assembly 60. The middle frame assembly 60 may include a substrate 61 for carrying the display screen 50 and a frame 62 arranged around the substrate 61. The substrate 61 is arranged opposite to the back cover 90. The frame 62 can be used to be snap-fitted with the back cover 90. That is, the substrate 61, the frame 62 and the back cover 90 are arranged to form the above-mentioned accommodating cavity.

[0068] The substrate 61 may be a conductive metal, or other materials. A ground plane and a feed source 903 may be provided on the substrate 61. In some embodiments, the ground plane and the feed source 903 may not be provided on the substrate 61, but may be provided directly on the circuit main board 70. In an optional embodiment of the present application, the grounding points on the first radiator 401, the second radiator 402, and the third radiator 403 in the antenna module 400 are all electrically connected to the ground plane on the substrate 61.

[0069] The frame 62 may be a conductive metal, so the frame 62 may also be referred to as a "metal frame". Of course, the frame 62 may also be other materials. The middle frame assembly 60 and the back cover 90 may form a housing assembly. The housing assembly may not be limited to the middle frame assembly 60 and the back cover 90. The housing assembly may be provided with the antenna module 400 by laminating, bonding, snapping, buckling, welding, etc.

[0070] In some embodiments, the antenna module 400 may be formed by a housing assembly. For example, the first radiator 401 , the second radiator 402 , and the third radiator 403 in the antenna module 400 may be disposed on the frame 62 , that is, may be processed by the frame 62 .

[0071] For example, a gap may be provided on the middle frame assembly 60, so that the first radiator 401, the second radiator 402 and the third radiator 403 may be formed on the middle frame assembly 60 through the gap. For example, the first radiator 401, the second radiator 402 and the third radiator 403 may be located on the frame 62, and the gap may be located between the substrate 61 and the frame 62, and may be opened on the frame 62. It should be noted that the first radiator 401, the second radiator 402 and the third radiator 403 may be located on the side of the frame 62.

[0072] It can be understood that in order to stabilize the connection strength between the substrate 61 and the frame 62 , an insulating material such as resin may be filled between the gaps to form a part of the antenna module 400 .

[0073] The technical features of the above embodiments may be combined arbitrarily. To make the description concise, 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 application.

[0074] The above-described embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be construed as limiting the scope of the present application. It should be noted that, for a person of ordinary skill in the art, several modifications and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the present application shall be subject to the attached claims.

Claims

1. An antenna module, It is characterized in that The antenna module comprises: a first radiator, a second radiator and a third radiator, wherein the second radiator is arranged between the first radiator and the third radiator, and the distance between the first radiator and the third radiator is greater than a preset distance threshold; The first radiator, the second radiator and the third radiator respectively support the antenna module to operate in a first frequency band, a second frequency band and a third frequency band; wherein the third frequency band is an N78 band, an N77 band or an N79 band, the second frequency band is an MHB band or a WiFi 2.4G band, and the first frequency band is an LB band.

2. The antenna module according to claim 1, It is characterized in that There is a gap between the first end of the second radiator and the first end of the first radiator, the second end of the second radiator and the first end of the third radiator are both grounded at a first grounding position, the second end of the third radiator is a free end, the first radiator is grounded at a second grounding position, and the second grounding position is located around the second end of the first radiator.

3. The antenna module according to claim 2, It is characterized in that The feeding point on the second radiator is located between the first end of the second radiator and the second end of the second radiator; the feeding point on the third radiator is located around the second end of the third radiator; and the feeding point on the first radiator is located around the first end of the first radiator.

4. The antenna module according to any one of claims 1 to 3, It is characterized in that The distance between the first radiator and the third radiator is greater than or equal to 16 mm and less than or equal to 24 mm.

5. The antenna module according to claim 4, It is characterized in that The distance between the first radiator and the third radiator is 22 mm.

6. The antenna module according to claim 2, It is characterized in that A filter material is disposed around the first grounding position to block the influence of the annular mode generated by the first radiator on the third radiator.

7. The antenna module according to claim 6, It is characterized in that The filter material is grounded foam.

8. A middle frame assembly, It is characterized in that The middle frame assembly is provided with an antenna module according to any one of claims 1 to 7, and the middle frame assembly further comprises: A substrate is provided with a ground plane and a feed source of the antenna module; and, A frame is arranged around the substrate, and the first radiator, the second radiator and the third radiator in the antenna module are arranged on the frame.

9. The middle frame assembly according to claim 8, It is characterized in that The first radiator, the second radiator and the third radiator are arranged in the side area of ​​the frame.

10. An electronic device, It is characterized in that The electronic device comprises a middle frame assembly, a display screen and a back cover as described in claim 8 or 9, wherein the display screen is arranged on one side of the middle frame assembly, and the back cover is arranged on the other side of the middle frame assembly and forms a receiving cavity with the middle frame assembly.

Images