Electronic device

Abstract

An electronic device includes a metal back cover and an antenna module. The metal back cover includes a slot, and the antenna module is located in the metal back cover. The antenna module includes a first radiator, a second radiator, a third radiator, a fourth radiator, and a fifth radiator. The first radiator has a feed-in end, the second radiator is connected to the first radiator, and has a contact portion that is in contact with the metal back cover. The third radiator is connected to the second radiator and is located beside the first radiator, and has a first ground end. The fourth radiator is connected to the second radiator and has a second ground end. The fifth radiator connects the third radiator and the fourth radiator, and the feed-in end, the first ground end, and the second ground end are all located between 3.5 mm and 10 mm from the slot.

Description

Technical Field

[0001] This invention relates to an electronic device, and more particularly to an electronic device having an antenna module. Background Technology

[0002] Currently, if a flat panel device uses a metal back cover, the internal antenna will be affected by the metal back cover, making it difficult for the antenna to perform well. Summary of the Invention

[0003] The purpose of this invention is to provide an electronic device having a metal back cover and an antenna module that can perform well.

[0004] An electronic device according to the present invention includes a metal back cover and an antenna module. The metal back cover includes a slot. The antenna module is located inside the metal back cover. The antenna module includes a first radiator, a second radiator, a third radiator, a fourth radiator, and a fifth radiator. The first radiator has a feed terminal. The second radiator is connected to the first radiator and has a contact portion, wherein the contact portion is conductive to the metal back cover. The third radiator is connected to the second radiator and located next to the first radiator, and the third radiator has a first ground terminal. The fourth radiator is connected to the second radiator, and the third radiator is located between the first radiator and the fourth radiator, and the fourth radiator has a second ground terminal. The fifth radiator connects the third radiator and the fourth radiator. The feed terminal, the first ground terminal, and the second ground terminal are all located 3.5 mm to 10 mm away from the slot to reduce the impact of the metal back cover on the performance of the antenna module.

[0005] In one embodiment of the present invention, the metal back cover includes a bottom wall and a side wall connected to the bottom wall, and a groove is formed between the bottom wall and the side wall.

[0006] In one embodiment of the present invention, the contact portion is connected to the metal back cover by a conductor, the slot includes a first end and a second end opposite to each other, the distance between the projection of the conductor onto the bottom wall and the projection of the first end onto the bottom wall is between 45 mm and 55 mm, and the distance between the projection of the conductor onto the bottom wall and the projection of the second end onto the bottom wall is between 15 mm and 25 mm.

[0007] In one embodiment of the present invention, the antenna module described above excites a frequency band, and the length of the slot is between 0.5 times and 0.75 times the wavelength of the frequency band.

[0008] In one embodiment of the present invention, the contact portion is connected to the metal back cover via a conductor, and the contact portion is located between the portion of the second radiator connected to the third radiator and the portion connected to the fourth radiator.

[0009] In one embodiment of the present invention, the second radiator includes a third end and a fourth end opposite to each other, the fourth radiator is close to the fourth end and far from the third end, the distance between the contact portion and the third end is between 25 mm and 35 mm, and the distance between the contact portion and the fourth end is between 7 mm and 15 mm.

[0010] In one embodiment of the present invention, the electronic device further includes a bracket and a circuit board, wherein the bracket and the circuit board are disposed inside a metal back cover, and the antenna module is disposed on multiple surfaces of the bracket, with the feed end, the first ground end and the second ground end facing and connected to the circuit board.

[0011] In one embodiment of the present invention, the surfaces of the bracket include a first surface, a second surface and a third surface connected in sequence, the third surface being disposed close to the circuit board and the first surface being disposed away from the circuit board, the second radiator being disposed on the first surface, a portion of the first radiator, a portion of the third radiator and a portion of the fourth radiator being disposed on the second surface, and the feed end, the first ground end, the second ground end and the fifth radiator being disposed on the third surface.

[0012] In one embodiment of the present invention, the metal back cover includes a bottom wall, and the distance between the first surface and the bottom wall is between 6 mm and 10 mm.

[0013] In one embodiment of the present invention, the above-mentioned electronic device further includes an insulating inner shell disposed inside a metal back cover. The insulating inner shell includes a plurality of vents connected to the slot, and the insulating inner shell is made of plastic.

[0014] Based on the above, the electronic device of the present invention employs a metal back cover, resulting in a high-quality appearance. In known electronic devices using metal back covers, if the metal back cover lacks slots, the antenna performance is affected by the metal back cover, and the energy of the antenna module is concentrated in the direction facing the front of the electronic device. The electronic device of the present invention has slots on its metal back cover, which prevents the radiated energy of the antenna module from being concentrated in a single axis, thus improving antenna performance. Furthermore, the design of the antenna module being connected to the metal back cover via contact points also increases the coverage of the radiated signal in the direction of the sidewalls of the electronic device. Moreover, since the distance between the feed end, first ground end, and second ground end of the antenna module within the metal back cover and the slot is between 4.5 mm and 10 mm, a certain distance exists between the antenna module and the metal back cover, reducing the impact of the metal back cover on the antenna module's performance. This differs from the known resonance mechanism where the antenna is tightly attached to the slot for coupling. Additionally, the above design of the antenna module can excite a WiFi 6E broadband signal (5150~7125MHz). Attached Figure Description

[0015] Figure 1This is a partial cross-sectional schematic diagram of an electronic device according to an embodiment of the present invention.

[0016] Figure 2 yes Figure 1 A side view of the electronic device.

[0017] Figure 3 yes Figure 1 A schematic diagram of the antenna module of an electronic device.

[0018] Figure 4 yes Figure 1 A schematic diagram of the top surface of the circuit board of an electronic device.

[0019] Figure 5 yes Figure 1 A schematic diagram of the bottom surface of the circuit board of an electronic device.

[0020] Figure 6 yes Figure 1 A three-dimensional schematic diagram of the antenna module and circuit board of an electronic device.

[0021] Figure 7 Looking from the outside in Figure 1 A partially enlarged schematic diagram of the side wall of the electronic device.

[0022] Figure 8 Looking from the inside out Figure 1 A partially enlarged schematic diagram of the electronic device.

[0023] Figure 9 yes Figure 1 The frequency-VSWR relationship of the antenna module of the electronic device.

[0024] Figure 10 yes Figure 1 The relationship between frequency and antenna efficiency of the antenna module of an electronic device.

[0025] The attached figures are labeled as follows:

[0026] L1, L9, L14, L18: Width

[0027] L2: Height

[0028] L3, L4, L5, L7, L8, L11, L12, L13, L15, L16: Distance

[0029] L6: Thickness

[0030] L10, L17: Length

[0031] A1~A6, B, G1, G2: Position

[0032] C1: Positive End

[0033] C2: Negative end

[0034] S1: First end

[0035] S2: Second end

[0036] 100: Electronic devices

[0037] 110: Metal back cover

[0038] 111a: Bottom wall

[0039] 111b: Sidewall

[0040] 112: Groove

[0041] 114: Touch module

[0042] 116: Insulating inner shell

[0043] 117: Vent

[0044] 118: Front cover

[0045] 120: Stent

[0046] 122: First Page

[0047] 124: Second page

[0048] 126: Third page

[0049] 130: Antenna Module

[0050] 131: First radiator

[0051] 132: Second radiator

[0052] 132a: Contact part

[0053] 133: Third radiator

[0054] 134: Fourth radiator

[0055] 135: Fifth Radiator

[0056] 140: Conductor

[0057] 150: Circuit board

[0058] 151: Top surface

[0059] 152, 155, 157: Shrapnel

[0060] 153: Bottom

[0061] 154: Antenna Matching Circuit

[0062] 156: Route

[0063] 160: Coaxial transmission line Detailed Implementation

[0064] Figure 1 This is a partial cross-sectional schematic diagram of an electronic device according to an embodiment of the present invention. Please refer to... Figure 1 In this embodiment, the electronic device 100 is, for example, a tablet computer. Figure 1 The image shows a partial cross-section of the antenna module near its frame area on the metal back cover. In other embodiments, the electronic device 100 may also be a laptop computer, and the type of electronic device 100 is not limited thereto.

[0065] Electronic device 100 includes a metal back cover 110 and an antenna module 130. The metal back cover 110 includes a bottom wall 111a and a side wall 111b connecting the bottom wall 111a, with a slot 112 formed between the bottom wall 111a and the side wall 111b. The antenna module 130 is located within the metal back cover 110. Specifically, in this embodiment, electronic device 100 also includes a bracket 120, which is made of an insulating material such as plastic. The antenna module 130 is formed on multiple surfaces of the bracket 120, for example, by laser direct forming (LDS), or fixed to multiple surfaces of the bracket 120 by attachment.

[0066] The surfaces of the bracket 120 include a first surface 122, a second surface 124, and a third surface 126 connected in sequence. The third surface 126 is disposed close to the circuit board 150, and the first surface 122 is disposed away from the circuit board 150. The antenna module 130 extends from the first surface 122, through the second surface 124, to the third surface 126. The electronic device 100 also includes a circuit board 150 located below the bracket 120, such as an antenna circuit board. The antenna module 130 is connected to the circuit board 150 via a spring clip 152.

[0067] The bracket 120 has a width L1 of, for example, 6.5 mm, a height L2 of, for example, 4.5 mm, and a length (not shown) of, for example, 176.4 mm. The distance L3 between the antenna module 130 and a touch module 114 (metal) is between 0.5 mm and 1.5 mm, for example, 1.2 mm. The distance L4 between the antenna module 130 and the sidewall 111b is between 0.4 mm and 1.5 mm, for example, 0.5 mm.

[0068] The distance L5 between the first surface 122 of the bracket 120 and the circuit board 150 is, for example, 5.6 mm; the thickness L6 of the circuit board 150 is, for example, 0.85 mm; and the distance L7 between the circuit board 150 and the bottom wall 111a is, for example, 1.65 mm. Therefore, in this embodiment, the distance L13 between the first surface 122 of the bracket 120 and the bottom wall 111a (indicated by...) is... Figure 2The distance (the sum of distances L5, L6, and L7) is between 6 mm and 10 mm, for example, approximately 8.1 mm. Furthermore, the distance L8 from the circuit board 150 to the sidewall 111b is, for example, 4.7 mm. The width L9 of the slot 112 is approximately 1.81 mm.

[0069] It should be noted that in conventional electronic devices using metal back covers, if the metal back cover has no slots, the antenna performance is affected by the metal back cover, and the energy of the antenna module will be concentrated in the direction facing the front of the electronic device (Z direction). The electronic device 100 of this embodiment not only uses a metal back cover 110, but also has a high-quality appearance. The metal back cover 110 is provided with slots 112, which prevents the energy of the antenna module 130 from being concentrated in a single axis (e.g., the Z direction).

[0070] Specifically, in this embodiment, the antenna module 130 is, for example, a WiFi 6E antenna, which can generate multiple frequency bands, such as WiFi 2.4GHz (2400~2500MHz) and WiFi 5G and 6G (5150~7125MHz). The WiFi 5G and 6G (5150~7125MHz) signals radiate in the Z direction (direction of the front cover 118), and the WiFi 2.4G radiation energy can be radiated in the Y direction (direction of the side wall 111b) through the slot 112.

[0071] Specifically, Figure 2 yes Figure 1 A side view of the electronic device. See also Figure 2 In this embodiment, the length L10 of the slot 112 is between 0.5 and 0.75 times the wavelength of the WiFi 2.4GHz (2400~2500MHz) band. This design allows the radiated energy of WiFi 2.4G to radiate in the Y direction (direction of the sidewall 111b) through the slot 112, resulting in good performance and effectively reducing the probability of poor antenna efficiency due to shielding of low frequencies (2.4GHz) by the metal back cover 110.

[0072] In addition, by Figure 2 As can be seen, the electronic device 100 includes two slots 112, and two corresponding conductors 140 connect the two antenna modules 130 (in... Figure 1 An antenna module 130 is connected to a metal back cover 110. Each antenna module 130 has a corresponding independent slot 112, which can have the advantages mentioned above.

[0073] Additionally, the slot 112 includes a first end S1 (indicated in) Figure 7 ) and a second end S2 (marked in Figure 7 The projection of conductor 140 onto bottom wall 111a and the projection of first end S1 onto bottom wall 111a (indicated by...) Figure 7 The distance L11 between the projections of the conductor 140 onto the bottom wall 111a and the projection of the second end S2 onto the bottom wall 111a is between 45 mm and 55 mm, for example, 50 mm. The distance L12 between the projection of the conductor 140 onto the bottom wall 111a and the projection of the second end S2 onto the bottom wall 111a is between 15 mm and 25 mm, for example, 20 mm. Distances L11 and L12 within the above ranges allow for better antenna performance and radiated energy coverage of the antenna module 130.

[0074] The following is an introduction to the icon of antenna module 130. Figure 3 yes Figure 1 A schematic diagram of the antenna module of the electronic device. Please refer to... Figure 3 In this embodiment, the antenna module 130 includes a first radiator 131 (positions A1, A2), a second radiator 132 (positions A3, A2, A4, A6), a third radiator 133 (positions G1, A4), a fourth radiator 134 (positions G2, A5) and a fifth radiator 135 (positions G1, B, G2).

[0075] The first radiator 131 has a feed end (position A1). The second radiator 132 is bent and connected to the first radiator 131, and has a contact portion 132a. In this embodiment, the antenna module 130 is connected to the conductor 140 via the contact portion 132a and is able to communicate with the metal back cover 110. The contact portion 132a is located between the portion of the second radiator 132 that connects to the third radiator 133 and the portion that connects to the fourth radiator 134. The width L14 of the contact portion 132a is approximately 4 mm.

[0076] The second radiator 132 includes a third end (position A3) and a fourth end (position A6) opposite to each other. The fourth radiator 134 is close to the fourth end (position A6) and far from the third end (position A3). The distance L16 between the contact portion 132a and the third end (position A3) is between 25 mm and 35 mm, for example, 30 mm. The distance L15 between the contact portion 132a and the fourth end (position A6) is between 7 mm and 15 mm, for example, 10.5 mm.

[0077] The third radiator 133 is bent and connected to the second radiator 132 and is located next to the first radiator 131. The third radiator 133 has a first grounding terminal (position G1). The shapes of the first radiator 131, the second radiator 132 and the third radiator 133 are similar. type.

[0078] A fourth radiator 134 is bent and connected to the second radiator 132. A third radiator 133 is located between the first radiator 131 and the fourth radiator 134. The fourth radiator 134 has a second ground terminal (position G2). A fifth radiator 135 connects the third radiator 133 and the fourth radiator 134. This configuration enables the antenna module 130 to have the characteristics of a WiFi 6E broadband antenna.

[0079] Specifically, the shapes of the first radiator 131, the second radiator 132, and the third radiator 133 are similar to The pattern can form a first circuit and is connected to the conductor 140 through the contact part 132a so that it can be conductive to the metal back cover 110 at the edge of the slot 112. It can be used to adjust the frequency landing position and impedance matching bandwidth of WiFi 2.4GHz (2400~2500MHz) and WiFi 5GHz (5000~5500MHz).

[0080] Furthermore, the shapes of the first radiator 131, the second radiator 132, and the fourth radiator 134 are also similar. The paths of the totem (located at A1, A2, A4, A5, and G2, which can be considered as the second loop), the third radiator 133 (located at A4 and G1), and the paths at A5 and A6 can be used to adjust the frequency landing point and impedance matching bandwidth of WiFi 6GHz (6000~7125MHz).

[0081] Additionally, the paths at locations A1, A2, A4, B, and G2 (i.e., the third loop) and the third radiator 133 (the path at locations A4 and G1) can be used to adjust the frequency landing point and impedance matching bandwidth of WiFi 5GHz and 6GHz (5500~6000MHz).

[0082] Therefore, antenna module 130 through The first, second, and third loops of the type are combined with the slots 112 of the metal back cover 110 to form a WiFi 6E antenna, whose high-frequency band can cover a bandwidth of 5150~7125MHz.

[0083] Furthermore, the antenna module 130 is connected to the metal back cover 110 via the contact portion 132a and the conductor 140, allowing the energy of the antenna module 130 to be coupled to the slot 112, resulting in more stable impedance matching in the resonant frequency band. The design of a certain distance between the antenna module 130 and the metal back cover 110 also differs from the known resonant mechanism where the antenna is tightly attached to the slot 112. Unlike the known slot design, the coupling distance is less prone to problems such as large assembly tolerances, leading to antenna frequency deviation, poor performance, or excessive maximum gain.

[0084] It is worth mentioning that you should pair it with... Figure 1 and Figure 3 In this embodiment, the antenna modules 130 are arranged in a three-dimensional manner. Specifically, in Figure 3 In the middle, the antenna module 130 is passed through by four dashed horizontal lines. The antenna module 130 is positioned between the first and second dashed horizontal lines from top to bottom on the bracket 120. Figure 1 The first surface 122. Specifically, the second radiator 132 is disposed on the first surface 122.

[0085] The antenna module 130 is located on the second surface 124 of the bracket 120 between the second and third dashed horizontal lines from top to bottom. Specifically, a portion of the first radiator 131, a portion of the third radiator 133, and a portion of the fourth radiator 134 are located on the second surface 124.

[0086] The antenna module 130 is located between the third and fourth dashed horizontal lines from top to bottom on the bracket 120. Figure 1 The third surface 126. Specifically, the feed end, the first ground end, the second ground end and the fifth radiator 135 are disposed on the third surface 126.

[0087] Depend on Figure 1 As can be seen, the antenna module 130 is located on the third surface 126, which is the feed end ( Figure 3 Position A1), first grounding terminal ( Figure 3 (position G1) and the second grounding terminal ( Figure 3 The position G2 will face the circuit board 150.

[0088] Since the distance L8 between the circuit board 150 and the side wall 111b is approximately 4.7 mm, and the portion of the antenna module 130 on the third surface 126 (including the feed end, the first ground end, and the second ground end) is further away from the side wall 111b than the circuit board 150, this means that the distance between the feed end, the first ground end, and the second ground end and the side wall 111b will be greater than 4.7 mm.

[0089] Furthermore, the distance between the feed end, the first ground end, and the second ground end and the bottom wall 111a is the sum of the difference between distance L5 and height L2 plus thickness L6 and distance L7 (L5-L2+L6+L7), which is approximately 3.7 mm. Therefore, the distance between the feed end, the first ground end, and the second ground end and the slot 112 will all be at least greater than 3.5 mm, and between 3.5 mm and 10 mm. This ensures that there is a certain distance between the feed end, the first ground end, and the second ground end of the antenna module 130 and the metal back cover 110, thereby reducing the impact of the metal back cover 110 on the performance of the antenna module 130.

[0090] Figure 4 yes Figure 1A schematic diagram of the top surface of the circuit board of an electronic device. Figure 5 yes Figure 1 A schematic diagram of the bottom surface of the circuit board of an electronic device. Figure 6 yes Figure 1 A three-dimensional schematic diagram of the antenna module and circuit board of an electronic device.

[0091] Please see Figure 4 and Figure 6 In this embodiment, the top surface 151 of the circuit board 150 is provided with three spring contacts 152, 155, and 157, and the feed end ( Figure 3 Position A1), first grounding terminal ( Figure 3 (position G1) and the second grounding terminal ( Figure 3 The three springs 152, 155, and 157 (position G2) are connected to the circuit board 150. The feed signal from the circuit board 150 is then transmitted to the antenna module 130 so that the radiated energy of the antenna module 130 is concentrated on the front (Z-axis) of the electronic device 100.

[0092] In addition, such as Figure 4 As shown, in this embodiment, the length L17 of the circuit board 150 is, for example, 28 mm, and the width L18 is, for example, 8 mm. The circuit board 150 also includes an antenna matching circuit 154. The three spring contacts 152, 155, and 157 are each connected to the antenna matching circuit 154 (inductor or capacitor), which can be used to increase the impedance matching bandwidth and antenna performance of the WiFi 6E antenna.

[0093] Please see Figure 5 The positive end C1 of the coaxial transmission line 160 is connected to the feed end (position A1) through the line 156 and the through hole (not shown), and the negative end C2 of the coaxial transmission line 160 is connected to the first ground end (position G1) through another through hole (not shown).

[0094] Figure 7 Looking from the outside in Figure 1 A partially enlarged schematic diagram of the side wall of the electronic device. Figure 8 Looking from the inside out Figure 1 A partially enlarged schematic diagram of the electronic device. Please refer to... Figure 7 and Figure 8 In this embodiment, the electronic device 100 further includes an insulating inner shell 116 disposed within the metal back cover 110. The insulating inner shell 116 includes a plurality of vents 117, which correspond to and communicate with the slots 112. The insulating inner shell 116 can be used to improve structural strength, and the design of these vents 117 and the slots 112 of the metal back cover 110 can simultaneously take into account heat dissipation.

[0095] Figure 9 yes Figure 1The frequency-VSWR relationship of the antenna module of the electronic device. Please refer to [link / reference]. Figure 9 In this embodiment, the voltage standing ratio (VSWR) of the antenna module 130 can be less than 3, thus exhibiting good performance.

[0096] Figure 10 yes Figure 1 The frequency-antenna efficiency relationship of the antenna module in the electronic device. Please refer to [link / reference]. Figure 10 In this embodiment, the antenna efficiency of the antenna module 130 for WiFi 2.4GHz is -3.8 to -5.5 dBi, while the antenna efficiency for WiFi 5GHz and 6GHz is -2.8 to -5.9 dBi. Despite the limitation of the electronic device 100 having a metal back cover 110, the antenna module 130 exhibits good performance.

[0097] In summary, the electronic device of the present invention employs a metal back cover, resulting in a high-quality appearance. In known electronic devices with metal back covers, if the metal back cover lacks slots, the antenna performance is affected by the metal back cover, and the energy of the antenna module is concentrated in the direction facing the front of the electronic device. The electronic device of the present invention has slots on the metal back cover, which prevents the radiated energy of the antenna module from being concentrated in a single axis, thus improving antenna performance. Furthermore, the design of the antenna module being connected to the metal back cover via contact points also increases the coverage of the radiated signal in the direction of the sidewalls of the electronic device. Moreover, since the distance between the feed end, first ground end, and second ground end of the antenna module within the metal back cover and the slot is between 4.5 mm and 10 mm, a certain distance exists between the antenna module and the metal back cover, reducing the impact of the metal back cover on the antenna module's performance. This also differs from the known resonance mechanism where the antenna is tightly attached to the slot for coupling. Additionally, the above design of the antenna module can excite a WiFi 6E broadband signal (5150~7125MHz).

Claims

1. An electronic device, characterized in that, include: A metal back cover, including a slot; as well as An antenna module, located within the metal back cover, includes: A first radiator having a feed end; A second radiator is connected to the first radiator and has a contact portion. The contact portion is connected to the metal back cover at the edge of the slot through a conductor, and is used to adjust the frequency landing position and impedance matching bandwidth of WiFi. A third radiator is connected to the second radiator and located next to the first radiator, the third radiator having a first ground terminal; A fourth radiator is connected to the second radiator, and a third radiator is located between the first radiator and the fourth radiator, the fourth radiator having a second ground terminal; and A fifth radiator connects the third and fourth radiators. The feed end, the first ground end, and the second ground end are all located 3.5 mm to 10 mm away from the slot to reduce the impact of the metal back cover on the performance of the antenna module.

2. The electronic device as claimed in claim 1, characterized in that, The metal back cover includes a bottom wall and a side wall connecting the bottom wall, and the slot is formed between the bottom wall and the side wall.

3. The electronic device as claimed in claim 2, characterized in that, The contact portion is connected to the metal back cover via a conductor. The slot includes a first end and a second end opposite to each other. The distance between the projection of the conductor onto the bottom wall and the projection of the first end onto the bottom wall is between 45 mm and 55 mm. The distance between the projection of the conductor onto the bottom wall and the projection of the second end onto the bottom wall is between 15 mm and 25 mm.

4. The electronic device as claimed in claim 1, characterized in that, The antenna module excites a frequency band, and the length of the slot is between 0.5 and 0.75 times the wavelength of that frequency band.

5. The electronic device as claimed in claim 1, characterized in that, The contact portion is connected to the metal back cover via a conductor, and the contact portion is located between the portion of the second radiator connected to the third radiator and the portion connected to the fourth radiator.

6. The electronic device as claimed in claim 5, characterized in that, The second radiator includes a third end and a fourth end opposite to each other. The fourth radiator is close to the fourth end and far from the third end. The distance between the contact portion and the third end is between 25 mm and 35 mm, and the distance between the contact portion and the fourth end is between 7 mm and 15 mm.

7. The electronic device as claimed in claim 1, characterized in that, It also includes a bracket and a circuit board, wherein the bracket and the circuit board are disposed inside the metal back cover, the antenna module is disposed on multiple surfaces of the bracket, and the feed end, the first ground end and the second ground end face and are connected to the circuit board.

8. The electronic device as claimed in claim 7, characterized in that, The bracket includes a first surface, a second surface, and a third surface connected in sequence. The third surface is close to the circuit board, and the first surface is away from the circuit board. The second radiator is disposed on the first surface, and a portion of the first radiator, a portion of the third radiator, and a portion of the fourth radiator are disposed on the second surface. The feed end, the first ground end, the second ground end, and the fifth radiator are disposed on the third surface.

9. The electronic device as claimed in claim 8, characterized in that, The metal back cover includes a bottom wall, and the distance between the first surface and the bottom wall is between 6 mm and 10 mm.

10. The electronic device as claimed in claim 1, characterized in that, It also includes an insulating inner shell disposed inside the metal back cover. The insulating inner shell includes multiple air holes connected to the slot, and the insulating inner shell is made of plastic.

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