Electronic device and antenna module

Abstract

An electronic device comprises a shell and an antenna module. The shell is provided with an accommodating space. The antenna module is located in the accommodating space and comprises a substrate, a first antenna unit, a second antenna unit and a third antenna unit. The first antenna unit, the second antenna unit and the third antenna unit are arranged on the substrate and are arranged along the arrangement direction. The first antenna unit comprises a first radiating body and a first grounding body. The first radiator and the first grounding body are respectively arranged on two opposite sides of the substrate. The second antenna unit comprises a second radiating body and a second grounding body. The second radiator and the second grounding body are respectively arranged on two opposite sides of the substrate. The third antenna unit comprises a third radiating body and a third grounding body. The third radiator and the third grounding body are respectively arranged on two opposite sides of the substrate.

Description

Technical Field

[0001] The invention relates to an electronic device and an antenna module, in particular to an eight-receive and eight-transmit electronic device and an antenna module. Background Art

[0002] With the advancement of wireless communication technology, electronic devices such as mobile phones and personal digital assistants are constantly developing towards diversified functions, thinner and lighter, faster and more efficient data transmission. Since electronic devices need to use antenna devices to send and receive signals, antenna devices play an important role in wireless communication technology.

[0003] Generally speaking, manufacturers need to design antenna devices in accordance with the signal frequency band applicable to electronic products such as smartphones. However, general antenna devices are bulky and difficult to install in smartphones, so manufacturers need to design different antenna devices according to the internal space of different smartphones, which is time-consuming and increases manufacturing costs. Therefore, how to maintain the applicable signal frequency band of the antenna device and reduce the size of the antenna device to be applicable to various smartphones is one of the problems that R&D personnel should solve. Summary of the invention

[0004] The present invention provides a method for maintaining the applicable signal frequency band of an antenna device and reducing the volume of the antenna device so as to be applicable to various smart phones.

[0005] An electronic device disclosed in an embodiment of the present invention comprises a housing and an antenna module. The housing has a storage space. The antenna module is located in the storage space and comprises a substrate, a first antenna unit, a second antenna unit and a third antenna unit. The first antenna unit, the second antenna unit and the third antenna unit are arranged on the substrate and arranged along an arrangement direction. The first antenna unit comprises a first radiator and a first grounding body. The first radiator and the first grounding body are respectively arranged on opposite sides of the substrate. The first radiator comprises a first radiating body and two first radiating heads. The first radiating body extends along the arrangement direction. The two first radiating heads are connected to one end of the first radiating body and extend in opposite directions respectively. The first grounding body has a first hollow portion. The first hollow portion corresponds to the first radiating body. The second antenna unit comprises a second radiator and a second grounding body. The second radiator and the second grounding body are respectively arranged on opposite sides of the substrate. The second radiator comprises a second radiating body and a second radiating head. The second radiating body extends along the arrangement direction. The second radiating head is connected to one end of the second radiating body. The second grounding body has a second hollow portion. The second hollow portion corresponds to the second radiating body. The third antenna unit includes a third radiator and a third grounding body. The third radiator and the third grounding body are respectively arranged on opposite sides of the substrate. The third radiator includes a third radiating body and a third radiating head. The third radiating body extends along the arrangement direction. The third radiating head is connected to one end of the third radiating body, and the direction of the third radiating head is opposite to the direction of the second radiating head. The third grounding body has a third hollow portion. The third hollow portion corresponds to the third radiating body.

[0006] The first antenna unit, the second antenna unit and the third antenna unit are arranged in sequence.

[0007] The number of the substrate and the first antenna unit is two, the number of the second antenna unit and the third antenna unit is three each, the first antenna unit, the second antenna unit and the third antenna unit are arranged in sequence on one of the substrates to form a first antenna component, and the first antenna unit, the second antenna unit, the third antenna unit, the second antenna unit and the third antenna unit are arranged in sequence on another of the substrates to form a second antenna component.

[0008] The antenna module includes six isolators, which are respectively arranged on the two substrates and respectively located between the first antenna unit, the second antenna unit and the third grounding body in the first antenna component and between the first antenna unit, the second antenna unit, the third antenna unit, the second antenna unit and the third antenna unit in the second antenna component.

[0009] The two first radiation heads have different lengths.

[0010] The first hollow portion has a first narrow section, a first wide section and two first slit sections, the first narrow section and the two first slit sections are respectively connected to the opposite sides of the first wide section, the two first slit sections extend along the arrangement direction and are respectively located on the opposite sides of the first radiation body, the two first slit sections have different lengths, and the first slit section with a longer length and the first radiation head with a shorter length are located on the same side, and the first slit section with a shorter length and the first radiation head with a longer length are located on the same side.

[0011] The second hollow portion has a second narrow section, a second wide section and two second slit sections, the second narrow section and the two second slit sections are respectively connected to the opposite sides of the second wide section, the two second slit sections extend along the arrangement direction and are respectively located on the opposite sides of the second radiation body, the two second slit sections have different lengths, and the second slit section with a shorter length is located on the same side as the second radiation head.

[0012] The third hollow portion has a third narrow section, a third wide section and two third slit sections, the third narrow section and the two third slit sections are respectively connected to the opposite sides of the third wide section, the two third slit sections extend along the arrangement direction and are respectively located on the opposite sides of the third radiation body, the two third slit sections have different lengths, and the third slit section with a shorter length is located on the same side as the third radiation head.

[0013] The two first radiation heads, the second radiation head and the third radiation head are all L-shaped.

[0014] Another embodiment of the present invention discloses an antenna module, comprising a substrate, a first antenna unit, a second antenna unit and a third antenna unit. The first antenna unit, the second antenna unit and the third antenna unit are arranged on the substrate and arranged along an arrangement direction. The first antenna unit comprises a first radiator and a first grounding body. The first radiator and the first grounding body are respectively arranged on opposite sides of the substrate. The first radiator comprises a first radiating body and two first radiating heads. The first radiating body extends along the arrangement direction. The two first radiating heads are connected to one end of the first radiating body and extend in opposite directions respectively. The first grounding body has a first hollow portion. The first hollow portion corresponds to the first radiating body. The second antenna unit comprises a second radiator and a second grounding body. The second radiator and the second grounding body are respectively arranged on opposite sides of the substrate. The second radiator comprises a second radiating body and a second radiating head. The second radiating body extends along the arrangement direction. The second radiating head is connected to one end of the second radiating body. The second grounding body has a second hollow portion. The second hollow portion corresponds to the second radiating body. The third antenna unit includes a third radiator and a third grounding body. The third radiator and the third grounding body are respectively arranged on opposite sides of the substrate. The third radiator includes a third radiating body and a third radiating head. The third radiating body extends along the arrangement direction. The third radiating head is connected to one end of the third radiating body, and the direction of the third radiating head is opposite to that of the second radiating head. The third grounding body has a third hollow portion. The third hollow portion corresponds to the third radiating body.

[0015] According to the electronic device and antenna module of the above-mentioned embodiment, since the first hollow portion, the second hollow portion and the third hollow portion respectively correspond to the two first radiation heads, the second radiation head and the third radiation head, and the first antenna unit, the second antenna unit and the third antenna unit are arranged in sequence, the volume of the antenna module can be reduced while maintaining the applicable signal frequency band of the antenna device, so that the manufacturer only needs to design the antenna module once and it can be applicable to various smartphones, without having to redesign the antenna module multiple times according to the internal space of different smartphones, thereby simplifying the design process of the antenna module and reducing the manufacturing cost.

[0016] The above description of the content of the present invention and the following description of the embodiments are intended to demonstrate and explain the principles of the present invention and to provide further explanation of the claims of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 FIG. 4 is a schematic plan view of an electronic device according to a first embodiment of the present invention.

[0018] Figure 2 for Figure 1 An exploded schematic diagram of a first antenna component and a second antenna component of an electronic device.

[0019] Figure 3 for Figure 1 A schematic plan view of a substrate and a first antenna unit of an electronic device.

[0020] Figure 4 for Figure 1 A schematic plan view of a substrate and a second antenna unit of an electronic device.

[0021] Figure 5 for Figure 1 A schematic plan view of a substrate of an electronic device and a third antenna unit.

[0022] Figure 6 A data graph showing the reflection loss of a first antenna component in an electronic device.

[0023] Figure 7 A graph showing the reflection loss of a second antenna component in an electronic device.

[0024] Figure 8 The figure is a data graph of reflection loss of a first antenna component and a second antenna component in an electronic device.

[0025] Fig. 9 A data graph showing the isolation of a first antenna component in an electronic device.

[0026] Fig.10 FIG. 1 is a graph showing the isolation of a second antenna component in an electronic device.

[0027] Explanation of symbols:

[0028] 10: Electronic devices

[0029] 20: Shell

[0030] 21: Accommodation space

[0031] 30: Antenna module

[0032] 31:Substrate

[0033] 32: First antenna unit

[0034] 321: The First Radiator

[0035] 3211: First Radiation Body

[0036] 3212: First Radiation Head

[0037] 322: first grounding body

[0038] 3221: First hollow part

[0039] 33: Second antenna unit

[0040] 331: Second Radiator

[0041] 3311: Second Radiant Body

[0042] 3312: Second radiation head

[0043] 332: Second grounding body

[0044] 3321: Second hollow part

[0045] 34: The third antenna unit

[0046] 341: The Third Radiator

[0047] 3411: The third radiant body

[0048] 3412: Third Radiation Head

[0049] 342: The third grounding body

[0050] 3421: The third hollow part

[0051] 35: Isolation

[0052] 36: Feed point

[0053] 40: Power supply

[0054] A: Arrangement direction

[0055] L1~L8: Length

[0056] M1, M2: Antenna assembly

[0057] S1, S4, S7: Narrow segment

[0058] S2, S5, S8: Wide section

[0059] S3, S6, S9: Slit sections DETAILED DESCRIPTION

[0060] See also Figure 1 and Figure 2 . Figure 1 FIG. 4 is a schematic plan view of an electronic device according to a first embodiment of the present invention. Figure 2 for Figure 1 An exploded schematic diagram of a first antenna component and a second antenna component of an electronic device.

[0061] The electronic device 10 of this embodiment includes a housing 20 and an antenna module 30. The housing 20 has a receiving space 21. The antenna module 30 is located in the receiving space 21 and includes two substrates 31, two first antenna units 32, three second antenna units 33, three third antenna units 34, six isolators 35 and eight feeding points 36.

[0062] The second substrate 31 is, for example, an FR4 board. The length of one of the second substrates 31 is, for example, 58.15 mm. The width of one of the second substrates 31 is, for example, 10 mm. The thickness of one of the second substrates 31 is, for example, 0.8 mm. The length of the other of the second substrates 31 is, for example, 100.2 mm. The width of the other of the second substrates 31 is, for example, 10 mm. The thickness of the other of the second substrates 31 is, for example, 0.8 mm.

[0063] Two first antenna units 32, three second antenna units 33 and three third antenna units 34 are respectively disposed on two substrates 31 and arranged along an arrangement direction A, and the first antenna unit 32, the second antenna unit 33 and the third antenna unit 34 are sequentially arranged on one substrate 31 to form a first antenna component M1, and the first antenna unit 32, the second antenna unit 33, the third antenna unit 34, the second antenna unit 33 and the third antenna unit 34 are sequentially arranged on the other substrate 31 to form a second antenna component M2. In each antenna component M1, M2, any two adjacent first antenna units 32, the second antenna unit 33 and the third antenna unit 34 are, for example, 5 mm apart.

[0064] Please refer to Figures 3 to 5 . Figure 3 for Figure 1 A schematic plan view of a substrate and a first antenna unit of an electronic device. Figure 4 for Figure 1 A schematic plan view of a substrate and a second antenna unit of an electronic device. Figure 5 for Figure 1 A schematic plan view of a substrate of an electronic device and a third antenna unit.

[0065] In detail, each first antenna unit 32 includes a first radiator 321 and a first grounding body 322. The first radiator 321 and the first grounding body 322 are respectively disposed on opposite sides of the substrate 31. The first radiator 321 includes a first radiation body 3211 and two first radiation heads 3212. The first radiation body 3211 extends along an arrangement direction A. The two first radiation heads 3212 are, for example, L-shaped, and the lengths L1 and L2 of the two first radiation heads 3212 are, for example, different. The two first radiation heads 3212 are connected to one end of the first radiation body 3211 and extend in opposite directions respectively. For example, one of the two first radiation heads 3212 extends to the left, and the other of the two first radiation heads 3212 extends to the right. The first grounding body 322 has a first hollow portion 3221. The first hollow portion 3221 corresponds to the first radiation body 3211. That is, the projection range of the first radiation body 3211 projected onto the substrate 31 at least partially overlaps with the projection range of the first grounding body 322 projected onto the substrate 31 .

[0066] The first hollow portion 3221 has a first narrow section S1, a first wide section S2 and two first slit sections S3. The first narrow section S1 is connected to one side of the first wide section S2, and the two first slit sections S3 are connected to the other side of the first wide section S2 relative to the first narrow section S1. The two first slit sections S3 extend along the arrangement direction A and are respectively located on opposite sides of the first radiation body 3211. The lengths L3 and L4 of the two first slit sections S3 are different, and the first slit section S3 with a longer length and the first radiation head 3212 with a shorter length are located on the same side relative to the first radiation body 3211. The first slit section S3 with a shorter length and the first radiation head 3212 with a longer length are located on the same side relative to the first radiation body 3211.

[0067] Each second antenna unit 33 includes a second radiator 331 and a second grounding body 332. The second radiator 331 and the second grounding body 332 are respectively disposed on opposite sides of the substrate 31. The second radiator 331 includes a second radiating body 3311 and a second radiating head 3312. The second radiating body 3311 extends along the arrangement direction A. The second radiating head 3312 is, for example, L-shaped, and the second radiating head 3312 is connected to one end of the second radiating body 3311. The second grounding body 332 has a second hollow portion 3321. The second hollow portion 3321 corresponds to the second radiating body 3311. In other words, the projection range of the second radiating body 3311 projected onto the substrate 31 at least partially overlaps with the projection range of the second grounding body 332 projected onto the substrate 31.

[0068] The second hollow portion 3321 has a second narrow section S4, a second wide section S5 and two second slit sections S6. The second narrow section S4 is connected to one side of the second wide section S5, and the two second slit sections S6 are connected to the other side of the second wide section S5 relative to the second narrow section S4. The two second slit sections S6 extend along the arrangement direction A and are respectively located on opposite sides of the second radiation body 3311. The lengths L5 and L6 of the two second slit sections S6 are different, and the second slit section S6 with a shorter length is located on the same side relative to the second radiation body 3311 as the second radiation head 3312.

[0069] Each third antenna unit 34 includes a third radiator 341 and a third grounding body 342. The third radiator 341 and the third grounding body 342 are respectively disposed on opposite sides of the substrate 31. The third radiator 341 includes a third radiating body 3411 and a third radiating head 3412. The third radiating body 3411 extends along the arrangement direction A. The third radiating head 3412 is, for example, L-shaped, and the third radiating head 3412 is connected to one end of the third radiating body 3411, and the direction of the third radiating head 3412 is opposite to the direction of the second radiating head 3312. For example, the second radiating head 3312 extends to the left, and the third radiating head 3412 extends to the right. The third grounding body 342 has a third hollow portion 3421. The third hollow portion 3421 corresponds to the third radiating body 3411. That is, the projection range of the third radiating body 3411 projected onto the substrate 31 at least partially overlaps with the projection range of the third grounding body 342 projected onto the substrate 31.

[0070] The third hollow portion 3421 has a third narrow section S7, a third wide section S8 and two third slit sections S9. The third narrow section S4 is connected to one side of the third wide section S8, and the two third slit sections S9 are connected to the other side of the third wide section S8 relative to the third narrow section S4. The two third slit sections S9 extend along the arrangement direction A and are respectively located at opposite sides of the third radiation body 3411. The lengths L7 and L8 of the two third slit sections S9 are different, and the shorter third slit section S9 and the third radiation head 3412 are located on the same side relative to the third radiation body 3411.

[0071] In this embodiment, the first hollow portion 3221, the second hollow portion 3321 and the third hollow portion 3421 respectively correspond to the two L-shaped first radiation heads 3212, the second radiation head 3312 and the third radiation head 3412, the first antenna unit 32, the second antenna unit 33 and the third antenna unit 34 in the first antenna component M1 are arranged in sequence, and the first antenna unit 32, the second antenna unit 33, the third antenna unit 34, the second antenna unit 33 and the third antenna unit 34 in the second antenna component M2 are arranged in sequence. In addition to reducing the degree of interference between signals when the first antenna component M1 and the second antenna component M2 transmit signals, the reflection loss can also be reduced.

[0072] The six isolators 35 are respectively disposed on the two substrates 31, and are respectively located between the first ground body 322, the second ground body 332 and the third ground body 342 in the first antenna component M1 and between the first ground body 322, the second ground body 332, the third ground body 342, the second ground body 332 and the third ground body 342 in the second antenna component M2. In this way, when the first antenna component M1 and the second antenna component M2 transmit signals, the isolation between the first antenna component M1 and the second antenna component M2 can be increased through the isolators to further reduce interference between the signals.

[0073] The eight feeding points 36 are respectively disposed at the first antenna component M1 and the second antenna component M2, and respectively connect the first radiator 321 and the first grounding body 322, the second radiator 331 and the second grounding body 332, and the third radiator 341 and the third grounding body 342. When the signal is fed in through the feeding points 36, it can be radiated outwards from the first radiator 321, the second radiator 331, and the third radiator 341.

[0074] In this embodiment, the electronic device 10 may further include a power supply 40. The power supply 40 is, for example, a battery, and is located in the accommodation space 21. The power supply 40 is electrically connected to the antenna module 30 (not shown), so as to provide power to the antenna module 30.

[0075] See also Figures 6 to 8 . Figure 6 A data graph showing the reflection loss of a first antenna component in an electronic device. Figure 7 A graph showing the reflection loss of a second antenna component in an electronic device. Figure 8 The figure is a data graph of reflection loss of a first antenna component and a second antenna component in an electronic device.

[0076] In the n79 frequency band of 5G, the reflection loss of the first antenna component M1, the reflection loss of the second antenna component M2, and the reflection loss of the combination of the first antenna component M1 and the second antenna component M2 of the present invention are all below -6dB, and even the reflection loss of some frequency bands is lower than -10dB. In other words, through the first hollow portion 3221, the second hollow portion 3321, and the third hollow portion 3421 respectively corresponding to the two L-shaped first radiation heads 3212, the second radiation heads 3312, and the third radiation heads 3412, the first antenna unit 32, the second antenna unit 33, and the third antenna unit 34 in the first antenna component M1 are arranged in sequence, and the first antenna unit 32, the second antenna unit 33, the third antenna unit 34, the second antenna unit 33, and the third antenna unit 34 in the second antenna component M2 are arranged in sequence, so that the first antenna module 30 and the second antenna module 30 can meet the impedance matching requirements in the n79 frequency band of 5G.

[0077] See also Fig. 9 and Fig.10 . Fig. 9 A data graph showing the isolation of a first antenna component in an electronic device. Fig.10 FIG. 1 is a graph showing the isolation of a second antenna component in an electronic device.

[0078] In the 5G n79 frequency band, the isolation between the antenna units 32-34 of the first antenna assembly M1 of the present invention and the isolation between the antenna units 32-34 of the second antenna assembly M2 are both below -13dB. In addition, the envelope coefficient (Envelope Correlation Coefficient, ECC, not shown) between the antenna units 32-34 of the first antenna assembly M1 of the present invention and the envelope coefficient (ECC, not shown) between the antenna units 32-34 of the second antenna assembly M2 are both below 0.038. That is to say, through the first hollow portion 3221, the second hollow portion 3321 and the third hollow portion 3421 respectively corresponding to the two L-shaped first radiation heads 3212, the second radiation head 3312 and the third radiation head 3412, the first antenna unit 32, the second antenna unit 33 and the third antenna unit 34 in the first antenna component M1 are arranged in sequence, and the first antenna unit 32, the second antenna unit 33, the third antenna unit 34, the second antenna unit 33 and the third antenna unit 34 in the second antenna component M2 are arranged in sequence, so that the isolation degree between the antenna units of the first antenna module 30 and the isolation degree between the antenna units of the second antenna module 30 are high, thereby reducing signal interference between the antenna units.

[0079] According to the electronic device and antenna module of the above-mentioned embodiment, since the first hollow portion, the second hollow portion and the third hollow portion respectively correspond to the two first radiation heads, the second radiation head and the third radiation head, and the first antenna unit, the second antenna unit and the third antenna unit are arranged in sequence, the volume of the antenna module can be reduced while maintaining the applicable signal frequency band of the antenna device, so that the manufacturer only needs to design the antenna module once and it can be applicable to various smartphones, without having to redesign the antenna module multiple times according to the internal space of different smartphones, thereby simplifying the design process of the antenna module and reducing the manufacturing cost.

[0080] Although the present invention is disclosed as above with the aforementioned embodiments, it is not intended to limit the present invention. Any person skilled in the art may make some changes and modifications without departing from the spirit and scope of the present invention. Therefore, the patent protection scope of the present invention shall be subject to the definition of the claims attached to this specification.

Claims

1. An electronic device, characterized in that: Include: A housing having a containing space; and An antenna module is located in the accommodation space and comprises a substrate, a first antenna unit, a second antenna unit and a third antenna unit, wherein the first antenna unit, the second antenna unit and the third antenna unit are disposed on the substrate and arranged along an arrangement direction; Wherein, the first antenna unit comprises a first radiator and a first grounding body, the first radiator and the first grounding body are respectively arranged on opposite sides of the substrate, the first radiator comprises a first radiating body and two first radiating heads, the first radiating body extends along the arrangement direction, the two first radiating heads are connected to one end of the first radiating body and extend in opposite directions respectively, and the first grounding body has a first hollow portion, and the first hollow portion corresponds to the first radiating body; The second antenna unit includes a second radiator and a second grounding body, the second radiator and the second grounding body are respectively arranged on opposite sides of the substrate, the second radiator includes a second radiating body and a second radiating head, the second radiating body extends along the arrangement direction, the second radiating head is connected to one end of the second radiating body, and the second grounding body has a second hollow portion, and the second hollow portion corresponds to the second radiating body; Among them, the third antenna unit includes a third radiator and a third grounding body, the third radiator and the third grounding body are respectively arranged on opposite sides of the substrate, the third radiator includes a third radiating body and a third radiating head, the third radiating body extends along the arrangement direction, the third radiating head is connected to one end of the third radiating body, and the orientation of the third radiating head is opposite to that of the second radiating head, and the third grounding body has a third hollow portion, and the third hollow portion corresponds to the third radiating body.

2. The electronic device according to claim 1, wherein: The first antenna unit, the second antenna unit and the third antenna unit are arranged in sequence.

3. The electronic device according to claim 1, wherein: The number of the substrate and the first antenna unit is two, the number of the second antenna unit and the third antenna unit is three each, the first antenna unit, the second antenna unit and the third antenna unit are arranged in sequence on one of the substrates to form a first antenna component, and the first antenna unit, the second antenna unit, the third antenna unit, the second antenna unit and the third antenna unit are arranged in sequence on another of the substrates to form a second antenna component.

4. The electronic device as claimed in claim 3, characterized in that: The antenna module includes six isolators, which are respectively arranged on the two substrates and respectively located between the first antenna unit, the second antenna unit and the third grounding body in the first antenna component and between the first antenna unit, the second antenna unit, the third antenna unit, the second antenna unit and the third antenna unit in the second antenna component.

5. The electronic device according to claim 1, wherein: The two first radiation heads have different lengths.

6. The electronic device as claimed in claim 5, characterized in that: The first hollow portion has a first narrow section, a first wide section and two first slit sections, the first narrow section and the two first slit sections are respectively connected to the opposite sides of the first wide section, the two first slit sections extend along the arrangement direction and are respectively located on the opposite sides of the first radiation body, the two first slit sections have different lengths, and the first slit section with a longer length and the first radiation head with a shorter length are located on the same side, and the first slit section with a shorter length and the first radiation head with a longer length are located on the same side.

7. The electronic device as claimed in claim 5, characterized in that: The second hollow portion has a second narrow section, a second wide section and two second slit sections, the second narrow section and the two second slit sections are respectively connected to the opposite sides of the second wide section, the two second slit sections extend along the arrangement direction and are respectively located on the opposite sides of the second radiation body, the two second slit sections have different lengths, and the second slit section with a shorter length is located on the same side as the second radiation head.

8. The electronic device as claimed in claim 5, characterized in that: The third hollow portion has a third narrow section, a third wide section and two third slit sections, the third narrow section and the two third slit sections are respectively connected to the opposite sides of the third wide section, the two third slit sections extend along the arrangement direction and are respectively located on the opposite sides of the third radiation body, the two third slit sections have different lengths, and the third slit section with a shorter length is located on the same side as the third radiation head.

9. The electronic device as claimed in claim 1, wherein: The two first radiation heads, the second radiation head and the third radiation head are all L-shaped.

10. An antenna module, characterized in that: Include: An antenna module comprises a substrate, a first antenna unit, a second antenna unit and a third antenna unit, wherein the first antenna unit, the second antenna unit and the third antenna unit are disposed on the substrate and arranged along an arrangement direction; The first antenna unit includes a first radiator and a first grounding body, the first radiator and the first grounding body are respectively arranged on opposite sides of the substrate, the first radiator includes a first radiating body and two first radiating heads, the first radiating body extends along the arrangement direction, the two first radiating heads are connected to one end of the first radiating body and extend in opposite directions respectively, and the first grounding body has a first hollow portion, and the first hollow portion corresponds to the first radiating body; The second antenna unit includes a second radiator and a second grounding body, the second radiator and the second grounding body are respectively arranged on opposite sides of the substrate, the second radiator includes a second radiating body and a second radiating head, the second radiating body extends along the arrangement direction, the second radiating head is connected to one end of the second radiating body, and the second grounding body has a second hollow portion, and the second hollow portion corresponds to the second radiating body; Among them, the third antenna unit includes a third radiator and a third grounding body, the third radiator and the third grounding body are respectively arranged on opposite sides of the substrate, the third radiator includes a third radiating body and a third radiating head, the third radiating body extends along the arrangement direction, the third radiating head is connected to one end of the third radiating body, and the orientation of the third radiating head is opposite to that of the second radiating head, and the third grounding body has a third hollow portion, and the third hollow portion corresponds to the third radiating body.

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