CN107995330B - Electronic device - Google Patents

Electronic device Download PDF

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Publication number
CN107995330B
CN107995330B CN201711211002.5A CN201711211002A CN107995330B CN 107995330 B CN107995330 B CN 107995330B CN 201711211002 A CN201711211002 A CN 201711211002A CN 107995330 B CN107995330 B CN 107995330B
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CN
China
Prior art keywords
circuit board
antenna
insulating
electronic device
flexible circuit
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Application number
CN201711211002.5A
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Chinese (zh)
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CN107995330A (en
Inventor
杨怀
伏奎
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Guangdong Oppo Mobile Telecommunications Corp Ltd
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Guangdong Oppo Mobile Telecommunications Corp Ltd
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Application filed by Guangdong Oppo Mobile Telecommunications Corp Ltd filed Critical Guangdong Oppo Mobile Telecommunications Corp Ltd
Priority to CN201711211002.5A priority Critical patent/CN107995330B/en
Publication of CN107995330A publication Critical patent/CN107995330A/en
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Publication of CN107995330B publication Critical patent/CN107995330B/en
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M1/00—Substation equipment, e.g. for use by subscribers
    • H04M1/02—Constructional features of telephone sets
    • H04M1/0202—Portable telephone sets, e.g. cordless phones, mobile phones or bar type handsets
    • H04M1/026—Details of the structure or mounting of specific components
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F1/00—Details not covered by groups G06F3/00 - G06F13/00 and G06F21/00
    • G06F1/16—Constructional details or arrangements
    • G06F1/18—Packaging or power distribution
    • G06F1/183—Internal mounting support structures, e.g. for printed circuit boards, internal connecting means
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00—Details of, or arrangements associated with, antennas
    • H01Q1/12—Supports; Mounting means
    • H01Q1/22—Supports; Mounting means by structural association with other equipment or articles
    • H01Q1/2258—Supports; Mounting means by structural association with other equipment or articles used with computer equipment
    • H01Q1/2266—Supports; Mounting means by structural association with other equipment or articles used with computer equipment disposed inside the computer
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00—Details of, or arrangements associated with, antennas
    • H01Q1/12—Supports; Mounting means
    • H01Q1/22—Supports; Mounting means by structural association with other equipment or articles
    • H01Q1/24—Supports; Mounting means by structural association with other equipment or articles with receiving set
    • H01Q1/241—Supports; Mounting means by structural association with other equipment or articles with receiving set used in mobile communications, e.g. GSM
    • H01Q1/242—Supports; Mounting means by structural association with other equipment or articles with receiving set used in mobile communications, e.g. GSM specially adapted for hand-held use
    • H01Q1/243—Supports; Mounting means by structural association with other equipment or articles with receiving set used in mobile communications, e.g. GSM specially adapted for hand-held use with built-in antennas
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M1/00—Substation equipment, e.g. for use by subscribers
    • H04M1/02—Constructional features of telephone sets
    • H04M1/0202—Portable telephone sets, e.g. cordless phones, mobile phones or bar type handsets
    • H04M1/026—Details of the structure or mounting of specific components
    • H04M1/0277—Details of the structure or mounting of specific components for a printed circuit board assembly

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  • Engineering & Computer Science (AREA)
  • Computer Hardware Design (AREA)
  • Signal Processing (AREA)
  • General Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Power Engineering (AREA)
  • Human Computer Interaction (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Details Of Aerials (AREA)
  • Support Of Aerials (AREA)

Abstract

The invention discloses an electronic device, comprising: a circuit board; an antenna for radiating energy, the antenna being electrically connected to the circuit board; the antenna comprises a nonlinear device and a flexible circuit board, wherein one end of the flexible circuit board is connected with the nonlinear device, the other end of the flexible circuit board is connected with the circuit board, the vertical projection of the flexible circuit board is intersected with the antenna, a metal coating is arranged on the surface of the flexible circuit board, and the metal coating is used for attenuating the energy radiated by the antenna to the flexible circuit board. The metal coating is formed on the surface of the flexible circuit board, the energy radiated to the flexible circuit board by the antenna is attenuated, the radiation energy received by the flexible circuit board is less, and the radiation energy coupled by the flexible circuit board is less, so that the harmonic wave generated by the nonlinear device is reduced, the phenomenon of radiation stray is weakened, the effect of radiating the usable signal by the antenna is improved, and the communication effect of the electronic equipment is improved.

Description

Electronic device
Technical Field
The present invention relates to the field of electronic technologies, and in particular, to an electronic device.
Background
The radiated stray is a most complex and difficult-to-solve problem in all authentications as a mandatory authentication index of the current electronic equipment. Especially for the GSM frequency band, because its own power is very high, it is easy to instantaneously excite strong energy to cause the harmonic wave of the radiated stray to exceed the standard.
In the prior art, electronic devices such as mobile terminals rely on antennas to radiate energy, along with the development of portability and intellectualization, electronic devices with multiple functions are integrated in the mobile terminals, the limitation of spatial arrangement is received, the electronic devices are generally close to the antennas, especially, non-linear devices such as a fingerprint unit and the like, the radiation energy of the antennas is transmitted to the fingerprint unit after being coupled by devices such as a Flexible Printed Circuit (FPC) and the like, the fingerprint unit generates harmonic waves through the non-linear action of the energy coupled by the antennas, and the harmonic waves are radiated out through the antennas, so that radiation stray is caused.
Disclosure of Invention
The invention aims to provide electronic equipment, which is used for solving the problem that radiation stray is caused by harmonic waves generated by nonlinear action of antenna radiation energy coupled by a flexible circuit board through a nonlinear device in the prior art.
To solve the above technical problem, the present invention provides an electronic device comprising:
a circuit board;
an antenna for radiating energy, the antenna being electrically connected to the circuit board;
the antenna comprises a nonlinear device and a flexible circuit board, wherein one end of the flexible circuit board is connected with the nonlinear device, the other end of the flexible circuit board is connected with the circuit board, the vertical projection of the flexible circuit board is intersected with the antenna, a metal coating is arranged on the surface of the flexible circuit board, and the metal coating is used for attenuating the energy radiated by the antenna to the flexible circuit board.
In one embodiment, the antenna is located between the circuit board and the flexible circuit board, the flexible circuit board includes a first surface facing the antenna, and the metal plating covers the first surface.
In one embodiment, the flexible circuit board further includes a second surface facing away from the antenna, and the metal plating further covers the second surface.
In one embodiment, the flexible circuit board further includes a side wall surface connecting the first surface and the second surface, and the metal plating layer further covers the side wall surface.
In one embodiment, the flexible circuit board includes a substrate, a conductive lead formed on the substrate, and an insulating layer covering the conductive lead, the metal plating layer is formed on the insulating layer, and the insulating layer is used to isolate the metal plating layer from the conductive lead.
In one embodiment, a first insulating support and a second insulating support are further disposed on a side of the circuit board facing the antenna, the first insulating support and the second insulating support are respectively disposed on two opposite sides of the antenna, and the first insulating support and the second insulating support the flexible circuit board so that the flexible circuit board does not contact the antenna.
In one embodiment, the nonlinear device is a fingerprint unit, and the electronic device further includes:
the metal bracket is fixed on the circuit board, and the fingerprint unit is fixed on the circuit board through the metal bracket;
the first insulating part is positioned between the metal support and the fingerprint unit and used for isolating the metal support from the fingerprint unit.
In one embodiment, the fingerprint unit comprises a first side facing the metal support, and the first insulating member covers the first side.
In one embodiment, the metal holder includes a second side facing the fingerprint unit, and the first insulator covers the second side.
In one embodiment, the electronic device further comprises:
the USB seat is fixed on the circuit board and is arranged adjacent to the metal bracket;
and the second insulating part is positioned between the USB seat and the metal bracket and used for isolating the USB seat from the metal bracket.
In one embodiment, the metal bracket includes a third side facing the USB socket, and the second insulator covers the third side.
In one embodiment, the first insulator and the second insulator are interconnected to form a frame body, and the metal bracket is accommodated in the frame body.
In one embodiment, the first insulating member is integrally formed with the second insulating member.
In one embodiment, the USB socket includes a fourth side facing the metal bracket, and the second insulating member covers the fourth side.
In one embodiment, the nonlinear device is a fingerprint unit, the electronic device further includes a USB socket, the USB socket is fixed on the circuit board and disposed adjacent to the fingerprint unit, a first insulating layer is disposed on a surface of the USB socket facing the fingerprint unit, and the first insulating layer is used for blocking energy radiated by the antenna coupled to the USB socket from being transmitted to the fingerprint module.
In one embodiment, the USB socket includes a fourth side, a fifth side, and a sixth side connecting the fourth side and the fifth side, the fourth side faces the surface of the metal bracket, the fifth side faces the surface of the USB socket away from the metal bracket, and the first insulating layer covers at least the fourth side and the sixth side.
In one embodiment, a surface of the metal support is provided with a second insulating coating, the metal support comprises a second side surface facing the fingerprint unit, and the second insulating coating covers the second side surface.
In one embodiment, the metal bracket includes a third side surface facing the USB socket, and the second insulating layer covers the third side surface.
In one embodiment, the metal bracket further includes a seventh side surface connecting the second side surface and the third side surface, and the second insulating layer covers the seventh side surface.
In one embodiment, the second insulating plating layer has a thickness greater than a thickness of the first insulating plating layer.
The invention has the following beneficial effects: the flexible circuit board is a linear device and can couple the energy radiated by the antenna, the nonlinear device can generate harmonic waves if receiving the radiation energy coupled by the flexible circuit board, the metal coating is formed on the surface of the flexible circuit board, the energy radiated by the antenna to the flexible circuit board is attenuated, the radiation energy received by the flexible circuit board is less, and the radiation energy coupled by the flexible circuit board is less, so that the harmonic waves generated by the nonlinear device are reduced, the phenomenon of radiation stray is weakened, the effect of radiating available signals by the antenna is improved, and the communication effect of the electronic equipment is improved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and other obvious modifications can be obtained by those skilled in the art without creative efforts.
Fig. 1 is a schematic structural diagram of an electronic device according to a first embodiment of the present invention.
Fig. 2 is a schematic diagram of a partially enlarged structure of an electronic device according to a first embodiment of the present invention.
Fig. 3 is a schematic structural diagram of another view angle of an electronic device according to an embodiment of the present invention.
Fig. 4 is a schematic radiation diagram of an electronic device according to an embodiment of the present invention.
Fig. 5 is a schematic structural diagram of an implementation manner of an electronic device according to an embodiment of the present invention.
Fig. 6 is a schematic structural diagram of a part of an electronic device according to a second embodiment of the present invention.
Fig. 7 is a schematic structural diagram of another view angle of the electronic device according to the second embodiment of the present invention.
Fig. 8 is a schematic cross-sectional view of a flexible circuit board of an electronic device according to a second embodiment of the present invention.
Fig. 9 is a schematic structural diagram of a part of an electronic device according to a third embodiment of the present invention.
Fig. 10 is a schematic structural diagram of a part of an electronic device according to a fourth embodiment of the present invention.
Fig. 11 is a schematic structural diagram of an implementation manner of an electronic device according to a fourth embodiment of the present invention.
Fig. 12 is a schematic partial structural diagram of an electronic device according to a fifth embodiment of the present invention.
Fig. 13 is a schematic structural diagram of a part of an electronic device according to a sixth embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The electronic equipment provided by the embodiment of the invention is electronic equipment with a function of radiating radio frequency signals, in particular to a portable mobile terminal, and specifically, the mobile terminal comprises electronic equipment such as a mobile phone, a tablet computer and a notebook computer. The electronic equipment provided by the embodiment of the invention also has the functions of fingerprint identification and USB data connection, in other words, the electronic equipment is provided with the fingerprint module and the USB seat.
Referring to fig. 1 to fig. 3, an electronic device 100 according to an embodiment of the invention includes a circuit board 20, an antenna 10, a flexible circuit board 40, and a non-linear device 30. Specifically referring to fig. 2, the circuit Board 20 is a Printed Circuit Board (PCB) 20, and various circuits and ports are disposed on the circuit Board 20, in this embodiment, the circuit Board 20 is a main Board of the electronic device 100, and various chips are disposed on the main Board for calculating and processing data. Further, the circuit board 20 is provided with a feeding circuit for controlling the radiation energy of the antenna 10. In one embodiment, the circuit board 20 is fixed to the middle frame of the electronic device 100 and is located in the housing 80 of the electronic device 100. In this embodiment, the antenna 10 is a radiator for radiating energy, the antenna 10 is electrically connected to the circuit board 20, and specifically, the antenna 10 is electrically connected to a feeding circuit on the circuit board 20, and the feeding circuit transmits a signal to be radiated by the antenna 10. In this embodiment, the antenna 10 may be fixed to the circuit board 20 or may be fixed to the housing 80. The antenna 10 is made of a metal material, in one embodiment, the housing 80 is made of a metal material, the antenna 10 may be a part of the housing 80, and the housing 80 is used as a radiator of the antenna 10, so that space can be saved.
Referring to fig. 2 in detail, in this embodiment, the nonlinear device 30 may be a fingerprint unit 300, a USB socket 54, or the like. The flexible circuit board 40 has one end connected to the nonlinear device 30 and the other end connected to the circuit board 20, and specifically, the flexible circuit board 40 functions to electrically connect the circuit board 20 and the nonlinear device 30. Referring to fig. 3, in the present embodiment, the flexible circuit board 40 is located above the circuit board 20, and the surface of the flexible circuit board 40 is not in contact with the circuit board 20. Referring to fig. 2, a vertical projection of the flexible circuit board 40 on the circuit board 20 intersects with the antenna 10, specifically, the antenna 10 is a strip, the flexible circuit board 40 spans over the antenna 10 from a width direction of the antenna 10, and there is an overlapping region between the vertical projection of the flexible circuit board 40 on the circuit board 20 and the vertical projection of the antenna 10 on the circuit board 20. In this embodiment, the surface of the flexible circuit board 40 is provided with a metal plating layer 70, and the metal plating layer 70 is used for attenuating the energy radiated from the antenna 10 to the flexible circuit board 40. Specifically, the metal plating layer 70 may be a plating layer formed on the surface of the flexible circuit board 40 by electroplating, vacuum plating, chemical vapor deposition or physical vapor deposition, such as a silver plating layer. In the process of radiating energy to the periphery of the antenna 10, part of the energy is inevitably radiated to the flexible circuit board 40, the flexible circuit board 40 can couple the radiated energy and transmit the coupled energy to other surrounding devices, if the coupled energy is transmitted to the nonlinear device 30, the nonlinear device 30 generates a harmonic wave through a nonlinear action, the harmonic wave returns to the antenna 10 along an original path through the flexible circuit board 40, the antenna 10 radiates the harmonic wave as a radiator, and the harmonic wave affects the originally radiated energy of the antenna 10, namely radiation stray occurs. Specifically, the usable signal radiated by the antenna 10 is GSM900, after the GSM900 is coupled by the flexible circuit board 40, the nonlinear device 30 generates second/third harmonics, the second/third harmonics return to the antenna 10 along the original path, the antenna 10 radiates the second/third harmonics, and the second/third harmonics form radiation stray on the usable signal.
Referring to fig. 3, in the present embodiment, the antenna 10 is located between the circuit board 20 and the flexible circuit board 40, the flexible circuit board 40 includes a first surface 402 facing the antenna 10, and the metal plating layer 70 covers the first surface 402. In one embodiment, the energy radiated from the antenna 10 to the flexible circuit board 40 is 3mW (milliwatt), and the energy is radiated in the direction shown by the arrow in fig. 4, 2mW of energy is absorbed by the metal coating 70 after the metal coating 70 is applied, the energy reaching the flexible circuit board 40 is only 1mW, and if the metal coating 70 is not applied, 3mW of energy is radiated to the flexible circuit board 40 completely. The harmonics generated by the non-linear device 30 with 1mW of energy are naturally less than the harmonics generated by the 3mW of energy.
The flexible circuit board 40 is a linear device and can couple energy radiated by the antenna 10, the nonlinear device 30 can generate harmonic waves if receiving the radiation energy coupled by the flexible circuit board 40, the metal plating layer 70 is formed on the surface of the flexible circuit board 40 to attenuate the energy radiated by the antenna 10 to the flexible circuit board 40, and the radiation energy received by the flexible circuit board 40 is less, so that the radiation energy coupled by the flexible circuit board 40 is less, thereby reducing the harmonic waves generated by the nonlinear device 30, reducing the phenomenon of radiation stray, improving the effect of the antenna 10 on radiating available signals, and improving the communication effect of the electronic device 100.
Referring to fig. 5, in one embodiment, a first insulating support 62 and a second insulating support 64 are further disposed on a side of the circuit board 20 facing the antenna 10, the first insulating support 62 and the second insulating support 64 are respectively disposed on two opposite sides of the antenna 10, and the first insulating support 62 and the second insulating support 64 support the flexible circuit board 40 so that the flexible circuit board 40 does not contact the antenna 10. The first insulating support 62 and the second insulating support 64 may be made of an insulating material such as rubber, the first insulating support 62 and the second insulating support 64 are respectively disposed at two sides of the antenna 10 in the width direction, and the flexible circuit board 40 is mounted on the first insulating support 62 and the second insulating support 64, so that a certain distance is maintained between the flexible circuit board 40 and the antenna 10, and the metal plating layer 70 on the surface of the flexible circuit board 40 is prevented from contacting the antenna 10.
Referring to fig. 6 and fig. 7, the electronic device 100 according to the second embodiment of the present invention is different from the first embodiment in that the flexible circuit board 40 further includes a second surface 404 facing away from the antenna 10 (the second surface 404 is shown in fig. 3), the metal plating layer 70 further covers the second surface 404, the flexible circuit board 40 further includes a sidewall 406 (the sidewall 406 is shown in fig. 2) connecting the first surface 402 and the second surface 404, and the metal plating layer 70 further covers the sidewall 406. Specifically, the metal plating layer 70 covers the surfaces of the flexible circuit board 40, so that the radiation energy of the antenna 10 is attenuated from all directions and radiated to the flexible circuit board 40, and the radiation stray phenomenon is further reduced.
The flexible circuit board 40 is a linear device and can couple energy radiated by the antenna 10, the nonlinear device 30 can generate harmonic waves if receiving the radiation energy coupled by the flexible circuit board 40, the metal plating layer 70 is formed on the surface of the flexible circuit board 40 to attenuate the energy radiated by the antenna 10 to the flexible circuit board 40, and the radiation energy received by the flexible circuit board 40 is less, so that the radiation energy coupled by the flexible circuit board 40 is less, thereby reducing the harmonic waves generated by the nonlinear device 30, reducing the phenomenon of radiation stray, improving the effect of the antenna 10 on radiating available signals, and improving the communication effect of the electronic device 100.
Referring to fig. 8, fig. 8 is a schematic cross-sectional view of the flexible circuit board 40. In this embodiment, the flexible circuit board 40 includes a substrate 400, a conductive lead 42 and an insulating layer 44, the conductive lead 42 is formed on the substrate 400, the insulating layer 44 covers the conductive lead 42, the metal plating layer 70 is formed on the insulating layer 44, and the insulating layer 44 is used for isolating the metal plating layer 70 from the conductive lead 42. Specifically, the conductive leads 42 are patterned metal layers formed on the substrate 400 by etching or the like, and the insulating layer 44 is disposed on the conductive leads 42 and separates the metal plating layer 70 from the conductive leads 42 to prevent the conductive leads 42 from being shorted with the metal plating layer 70.
Referring to fig. 9 and 10, the electronic device 100 according to the third embodiment of the present invention further includes a metal bracket 52 and a first insulating member 62, wherein the nonlinear device is a fingerprint unit 300. Specifically, the metal holder 52 is fixed to the circuit board 20, and the fingerprint unit 300 is fixed to the circuit board 20 by the metal holder 52. The fingerprint unit 300 is a device directly contacting a finger of a user, the fingerprint unit 300 includes a fingerprint chip for processing fingerprint information, a touch pad for contacting the finger, and a decoration ring for grounding, and further, the fingerprint unit 300 is a nonlinear device. The metal support 52 is the support of installation fingerprint unit 300, and metal support 52 is linear device, and further, in order to reduce the volume of electronic equipment 100, the distance of fingerprint module and antenna 10 is little. In the process of radiating energy to the periphery of the antenna 10, part of the energy is inevitably radiated to the metal support 52, the metal support 52 can couple the radiated energy and transmit the coupled energy to other surrounding devices, if the coupled energy is transmitted to a nonlinear device such as the fingerprint unit 300, the nonlinear device generates a harmonic wave through a nonlinear action, the harmonic wave returns to the antenna 10 along an original path through the metal support 52, the antenna 10 radiates the harmonic wave as a radiator, and the harmonic wave affects the originally radiated energy of the antenna 10, that is, radiation stray occurs. Specifically, the usable signal radiated by the antenna 10 is GSM900, after GSM900 is coupled by the metal bracket 52, the nonlinear device (fingerprint unit 300) generates second/third harmonics, the second/third harmonics return to the antenna 10 along the original path, the antenna 10 radiates the second/third harmonics, and the second/third harmonics form stray radiation to the usable signal.
Referring to fig. 10, in the present embodiment, the first insulating member 62 is located between the metal frame 52 and the fingerprint unit 300 for isolating the metal frame 52 from the fingerprint unit 300, so that the radiation energy coupled by the metal frame 52 cannot be transmitted to the fingerprint unit 300. Specifically, the first insulating member 62 may be attached to the surface of the metal support 52, or may be attached to the surface of the fingerprint unit 300, or the first insulating member 62 may be independently disposed between the metal support 52 and the fingerprint unit 300. In one embodiment, the fingerprint unit 300 includes a first side 11, the first side 11 is a side of the fingerprint unit 300 facing the metal support 52, and the first insulating member 62 covers the first side 11 to enhance the isolation between the metal support 52 and the fingerprint unit 300. Specifically, the area of the surface of the first insulating member 62 facing the fingerprint unit 300 is larger than the first side surface 11, so that the path for transferring the coupling energy from the metal holder 52 to the fingerprint unit 300 is cut off, the radiation energy coupled by the metal holder 52 cannot be transferred to the fingerprint unit 300, and the fingerprint unit 300 does not generate harmonic waves, i.e., radiation straggle is avoided from the source. In this embodiment, the first insulating member 62 may be a sheet to block the metal holder 52 and the fingerprint unit 300 to the maximum extent, and further, the first insulating member 62 has a certain thickness to meet the requirement of blocking the radiation energy. In one embodiment, the first insulating member 62 may also be a sheet with a curved surface, for example, the cross section is an arc, and the center of curvature of the arc is located on the fingerprint unit 300 side, so as to increase the coverage area of the first insulating member 62 on the fingerprint unit 300 and improve the insulating effect.
In one embodiment, the metal support 52 includes a second side 12, the second side 12 is a surface of the metal support 52 facing the fingerprint unit 300, and the first insulator 62 covers the second side 12 to enhance the isolation between the metal support 52 and the fingerprint unit 300. Specifically, the area of the surface of the first insulating member 62 facing the metal holder 52 is larger than that of the second side surface 12, so that the path for transferring the coupling energy from the metal holder 52 to the fingerprint unit 300 is cut off, the radiation energy coupled by the metal holder 52 cannot be transferred to the fingerprint unit 300, and the fingerprint unit 300 does not generate harmonic waves, i.e., radiation straggling is avoided from the source. In one embodiment, the first insulating member 62 may also be a sheet with a curved surface, for example, an arc-shaped cross section, and the center of curvature of the arc-shaped cross section is located at one side of the metal bracket 52, so as to increase the coverage area of the metal bracket 52 by the first insulating member 62 and improve the insulating effect.
The metal support 52 is a linear device, and can couple the energy radiated by the antenna 10, the fingerprint unit 300 is a nonlinear device, if the radiation energy coupled by the metal support 52 can generate harmonic waves, the first insulating part 62 isolates the metal support 52 from the fingerprint unit 300, and the radiation energy coupled by the metal support 52 cannot be transmitted to the fingerprint unit 300, so the fingerprint unit 300 cannot generate harmonic waves and return to the antenna 10, thereby avoiding the phenomenon that the harmonic waves generated by the fingerprint unit 300 are radiated by stray waves, improving the effect of radiating available signals by the antenna 10, and improving the communication effect of the electronic device 100.
Referring to fig. 10, the electronic device 100 according to the fourth embodiment of the present invention is different from the third embodiment in that the electronic device 100 further includes a USB socket 54 and a second insulating member 64. The USB socket 54 is fixed to the circuit board 20, and the USB socket 54 and the fingerprint unit 300 are respectively located at both sides of the metal bracket 52. Specifically, the USB socket 54 has a metal shell, the USB socket 54 is also a linear device, the USB socket 54 can couple energy radiated by the antenna 10, specifically, in the process of radiating energy to the periphery of the antenna 10, a part of energy is inevitably radiated to the USB socket 54, the USB socket 54 can couple the radiation energy and transmit the radiation energy to other devices around, if the USB socket 54 transmits the radiation energy to the metal bracket 52, and the metal bracket 52 transmits the radiation energy to the non-linear device such as the fingerprint unit 300, the non-linear device generates a harmonic wave through a non-linear effect, the harmonic wave returns to the antenna 10 along an original path through the metal bracket 52, the antenna 10 radiates the harmonic wave as a radiator, and the harmonic wave affects the originally radiated energy of the antenna 10, that is, radiation stray occurs. Specifically, the usable signal radiated by the antenna 10 is GSM900, after GSM900 is coupled by the metal bracket 52, the nonlinear device (fingerprint unit 300) generates second/third harmonics, the second/third harmonics return to the antenna 10 along the original path, the antenna 10 radiates the second/third harmonics, and the second/third harmonics form stray radiation to the usable signal.
In this embodiment, the second insulating member 64 is located between the USB socket 54 and the metal bracket 52 for isolating the USB socket 54 from the metal bracket 52, so that the radiation energy coupled by the USB socket 54 cannot be transmitted to the metal bracket 52. Specifically, the second insulating member 64 may be attached to the surface of the USB socket 54, or may be attached to the surface of the metal support 52, or the second insulating member 64 may be independently disposed between the USB socket 54 and the metal support 52. In one embodiment, the metal bracket 52 includes a third side 13, the third side 13 is a side of the metal bracket 52 facing the USB socket 54, and the second insulator 64 covers the third side 13 to enhance the isolation between the USB socket 54 and the metal bracket 52. Specifically, the area of the surface of the second insulating member 64 facing the metal bracket 52 is larger than the area of the third side 13, so that the path for transferring the coupling energy from the USB socket 54 to the metal bracket 52 is cut off, the coupling radiation energy from the USB socket 54 cannot be transferred to the fingerprint unit 300, and the fingerprint unit 300 does not generate harmonic waves, i.e., stray radiation is avoided from the source. In this embodiment, the second insulating member 64 may be a sheet to isolate the USB socket 54 from the metal bracket 52 to the maximum extent, and further, the second insulating member 64 has a certain thickness to meet the requirement of isolating the radiation energy. In one embodiment, the second insulating member 64 may also be a curved sheet, for example, the cross section is an arc, and the center of curvature of the arc is located on one side of the metal support 52, so as to increase the coverage area of the second insulating member 64 on the metal support 52 and improve the insulating effect.
In one embodiment, the USB socket 54 includes a fourth side 14, the fourth side 14 is a surface of the USB socket 54 facing the metal bracket 52, and the second insulating member 64 covers the fourth side 14 to enhance the isolation between the USB socket 54 and the metal bracket 52. Specifically, the area of the surface of the second insulating member 64 facing the USB socket 54 is larger than the fourth side 14, so that the path for transferring the coupling energy from the USB socket 54 to the metal bracket 52 is cut off, the coupling radiation energy from the USB socket 54 cannot be transferred to the fingerprint unit 300, and the fingerprint unit 300 does not generate harmonics, i.e. stray radiation is avoided from the source. In one embodiment, the second insulating member 64 may also be a curved sheet, for example, the cross section is an arc, and the center of curvature of the arc is located on one side of the USB socket 54, so as to increase the coverage area of the second insulating member 64 on the USB socket 54 and improve the isolation effect.
Referring to fig. 11, in one embodiment, the first insulating member 62 and the second insulating member 64 are interconnected to form a frame body, and the metal bracket 52 is accommodated in the frame body. The first insulating part 62 and the second insulating part 64 are connected end to form a frame body with a sealed periphery, the metal support 52 is located in the frame body, the radiation energy coupled with the USB socket 54 cannot enter the frame body and is transmitted to the metal support 52, and the radiation energy coupled with the metal support 52 cannot be transmitted outwards from the frame body, so that the fingerprint unit 300 cannot receive the radiation energy, and the fingerprint unit 300 cannot generate harmonic waves to cause radiation stray. In one embodiment, the frame formed by the first insulating member 62 and the second insulating member 64 covers the second side 12 and the third side 13 of the metal bracket 52 and the surface connecting the second side 12 and the third side 13.
In one embodiment, the first insulating member 62 and the second insulating member 64 are integrally formed, that is, the first insulating member 62 and the second insulating member 64 are an insulating whole, so that the manufacturing difficulty of a frame body formed by connecting the first insulating member 62 and the second insulating member 64 is reduced, and the frame body has no assembly gap and cannot cause radiation energy leakage.
Referring to fig. 12, a surface of the USB socket 54 of the electronic device 100 facing the fingerprint module according to the fifth embodiment of the present invention is provided with a first insulating layer 72, and the first insulating layer 72 is used for blocking energy radiated by the antenna 10 coupled to the USB socket 54 from being transmitted to the fingerprint unit 300. Specifically, the first insulating plating layer 72 is plated on the surface of the USB socket 54 by electroplating, vacuum plating, physical vapor deposition or chemical vapor deposition, and the like, and the plating method is simple and easy to implement, and the plating effect is good. In one embodiment, the USB socket 54 includes a fourth side 14, a fifth side 15 and a sixth side 16 connecting the fourth side 14 and the fifth side 15, the fourth side 14 is a surface of the USB socket 54 facing the fingerprint module, the fifth side 15 is a surface of the USB socket 54 facing away from the fingerprint unit 300, and the first insulating layer 72 at least covers the fourth side 14 and the sixth side 16. Specifically, as shown in fig. 12, the first insulating plating layer 72 covers the fourth side 14 and the sixth side 16, and the first insulating plating layer 72 covers the surfaces of the USB socket 54 facing the fingerprint unit 300 and the surfaces of the USB socket 54 facing the fingerprint unit 300, so as to further enhance the isolation between the USB socket 54 and the fingerprint unit 300. The radiation energy of the antenna 10 coupled to the USB socket 54 is blocked during the transmission process, so that the radiation energy transmitted to the fingerprint unit 300 is reduced, and the radiation stray is reduced when the harmonic wave generated by the fingerprint unit 300 is small. Furthermore, during the process of the harmonic wave generated by the fingerprint unit 300 returning along the original path, the first insulating layer 72 isolates the USB socket 54 from the fingerprint unit 300, so that the harmonic wave transmitted from the fingerprint unit 300 received by the USB socket 54 is reduced, and the radiation stray finally transmitted to the antenna 10 is further reduced.
USB seat 54 is linear device, can couple the energy of antenna 10 radiation, fingerprint unit 300 is nonlinear device, if receive the radiation energy of USB seat 54 coupling and can produce the harmonic, isolated USB seat 54 of first insulation coating 72 and fingerprint unit 300, the radiation energy of USB seat 54 coupling can't transmit to fingerprint unit 300, so fingerprint unit 300 can not produce the harmonic and return to antenna 10, fingerprint unit 300 has been avoided producing the harmonic and has appeared the phenomenon of radiating straggly, the effect of antenna 10 radiation available signal has been improved, the communication effect of electronic equipment 100 has been improved.
With continued reference to fig. 12, in one embodiment, the first insulating plating layer 72 also covers the fifth side 15. Specifically, the fifth side 15 is a side surface of the USB socket 54 departing from the fingerprint module, and the first insulating plating layer 72 covers the circumferential surface of the USB socket 54, so as to cover the USB socket 54 from various angles, thereby further isolating the USB socket 54 from the fingerprint unit 300. The radiation energy of the antenna 10 coupled to the USB socket 54 is attenuated, so that the radiation energy transmitted to the fingerprint unit 300 is reduced, and the radiation stray is reduced when the harmonic wave generated by the fingerprint unit 300 is small. Furthermore, during the process of the harmonic wave generated by the fingerprint unit 300 returning along the original path, the first insulating layer 72 isolates the USB socket 54 from the fingerprint unit 300, so that the harmonic wave transmitted from the fingerprint unit 300 received by the USB socket 54 is reduced, and the radiation stray finally transmitted to the antenna 10 is further reduced.
Referring to fig. 13, a difference between the electronic device 100 according to the sixth embodiment of the present invention and the fifth embodiment of the present invention is that the surface of the metal support 52 is provided with a second insulating plated layer 74, and the second insulating plated layer 74 covers the second side surface 12. Specifically, the second insulating plating layer 74 covers the second side surface 12, and the second insulating plating layer 74 covers the surface of the metal support 52 facing the fingerprint unit 300, so as to enhance the isolation between the metal support 52 and the fingerprint unit 300. The radiation energy of the antenna 10 coupled with the metal bracket 52 is blocked in the transmission process, so that the radiation energy transmitted to the fingerprint unit 300 is reduced, and the radiation stray is reduced when the harmonic waves generated by the fingerprint unit 300 are small. Further, during the process of the harmonic wave generated by the fingerprint unit 300 returning along the original path, the second insulating plating layer 74 isolates the metal support 52 from the fingerprint unit 300, so that the harmonic wave transmitted from the fingerprint unit 300 received by the metal support 52 is reduced, and the radiation stray finally transmitted to the antenna 10 is further reduced.
With continued reference to fig. 13, in one embodiment, the metal support 52 further includes a third side 13 facing away from the fingerprint unit 300, and the second insulating plating layer 74 covers the third side 13. Further, the metal bracket 52 further includes a seventh side 17, the seventh side 17 connects the second side 12 and the third side 13, and the second insulating plating layer 74 covers the seventh side 17. The second insulating plating layer 74 covers the circumferential surface of the metal holder 52, and covers the metal holder 52 from various angles, thereby further isolating the USB socket 54 from the metal holder 52, the metal holder 52 from the fingerprint unit 300. The radiation energy of the antenna 10 coupled with the metal bracket 52 is attenuated, so that the radiation energy transmitted to the fingerprint unit 300 is reduced, and the radiation stray is reduced when the harmonic wave generated by the fingerprint unit 300 is small. Further, during the process of the harmonic wave generated by the fingerprint unit 300 returning along the original path, the second insulating plating layer 74 isolates the metal support 52 from the fingerprint unit 300, so that the harmonic wave transmitted from the fingerprint unit 300 received by the metal support 52 is reduced, and the radiation stray finally transmitted to the antenna 10 is further reduced.
USB seat 54 is linear device, can couple the energy of antenna 10 radiation, fingerprint unit 300 is nonlinear device, if receive the radiation energy of USB seat 54 coupling and can produce the harmonic, isolated USB seat 54 of first insulation coating 72 and fingerprint unit 300, the radiation energy of USB seat 54 coupling can't transmit to fingerprint unit 300, so fingerprint unit 300 can not produce the harmonic and return to antenna 10, fingerprint unit 300 has been avoided producing the harmonic and has appeared the phenomenon of radiating straggly, the effect of antenna 10 radiation available signal has been improved, the communication effect of electronic equipment 100 has been improved.
In one embodiment, the thickness of the second insulating plating layer 74 is greater than the thickness of the first insulating plating layer 72. The metal bracket 52 is located between the USB socket 54 and the fingerprint unit 300, the second insulating plating layer 74 covers the metal bracket 52, the second insulating plating layer 74 blocks the path from the USB socket 54 to the fingerprint unit 300, and the second insulating plating layer 74 is thickened to further improve the blocking effect of the radiation energy of the coupled antenna 10.
The flexible circuit board 40 is a linear device and can couple energy radiated by the antenna 10, the fingerprint unit 300 is a nonlinear device, if the radiation energy coupled by the flexible circuit board 40 is received, harmonic waves can be generated, the metal plating layer 70 is formed on the surface of the flexible circuit board 40, the energy radiated by the antenna 10 to the flexible circuit board 40 is attenuated, and the radiation energy received by the flexible circuit board 40 is less, the radiation energy coupled by the flexible circuit board 40 is less, so that the harmonic waves generated by the nonlinear device are reduced, the phenomenon of radiation stray is weakened, the effect of the antenna 10 on radiating available signals is improved, and the communication effect of the electronic device 100 is improved.
While the invention has been described with reference to a number of illustrative embodiments, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention.

Claims (18)

1. An electronic device, comprising:
a circuit board;
an antenna for radiating energy, the antenna being fixed to and electrically connected to a circuit board;
the antenna comprises a nonlinear device and a flexible circuit board, wherein one end of the flexible circuit board is connected with the nonlinear device, the other end of the flexible circuit board is connected with the circuit board, the vertical projection of the flexible circuit board on the circuit board is intersected with the antenna, a metal coating is arranged on the surface of the flexible circuit board, and the metal coating is used for attenuating the energy radiated to the flexible circuit board by the antenna;
the antenna is located between the circuit board and the flexible circuit board, the flexible circuit board comprises a first surface facing the antenna and a second surface facing away from the antenna, and the metal plating layer covers the first surface and the second surface.
2. The electronic device of claim 1, wherein the flexible circuit board further comprises a sidewall surface connecting the first surface and the second surface, the metallization further covering the sidewall surface.
3. The electronic device according to claim 2, wherein the flexible circuit board includes a substrate, a conductive lead formed on the substrate, and an insulating layer covering the conductive lead, wherein the metal plating layer is formed on the insulating layer, and wherein the insulating layer is configured to separate the metal plating layer from the conductive lead.
4. The electronic device according to claim 1, wherein a first insulating support and a second insulating support are further provided on a side of the circuit board facing the antenna, the first insulating support and the second insulating support are respectively provided on two opposite sides of the antenna, and the first insulating support and the second insulating support the flexible circuit board so that the flexible circuit board is not in contact with the antenna.
5. The electronic device of claim 1, wherein the non-linear device is a fingerprint unit, the electronic device further comprising:
the metal bracket is fixed on the circuit board, and the fingerprint unit is fixed on the circuit board through the metal bracket;
the first insulating part is positioned between the metal support and the fingerprint unit and used for isolating the metal support from the fingerprint unit.
6. The electronic device of claim 5, wherein the fingerprint unit includes a first side facing the metal holder, and the first insulator covers the first side.
7. The electronic device of claim 6, wherein the metal bracket includes a second side facing the fingerprint unit, and wherein the first insulator covers the second side.
8. The electronic device of claim 7, further comprising:
the USB seat is fixed on the circuit board and is arranged adjacent to the metal bracket;
and the second insulating part is positioned between the USB seat and the metal bracket and used for isolating the USB seat from the metal bracket.
9. The electronic device of claim 8, wherein the metal bracket includes a third side facing the USB socket, and the second insulator covers the third side.
10. The electronic device according to claim 9, wherein the first insulating member and the second insulating member are interconnected to form an integral frame body, and the metal holder is housed in the frame body.
11. The electronic device of claim 10, wherein the first insulator is integrally formed with the second insulator.
12. The electronic device of claim 8, wherein the USB cradle includes a fourth side facing the metal bracket, and the second insulator covers the fourth side.
13. The electronic device according to claim 1, wherein the nonlinear device is a fingerprint unit, the electronic device further includes a USB socket, the USB socket is fixed on the circuit board and disposed adjacent to the fingerprint unit, the USB socket surface has a first insulating coating on a surface of the fingerprint unit, and the first insulating coating is configured to block energy radiated by the antenna coupled to the USB socket from being transmitted to the fingerprint module.
14. The electronic device according to claim 13, wherein the USB socket includes a fourth side, a fifth side, and a sixth side connecting the fourth side and the fifth side, the fourth side faces a surface of the metal bracket, the fifth side is a surface of the USB socket facing away from the metal bracket, and the first insulating layer covers at least the fourth side and the sixth side.
15. The electronic device of claim 13, wherein a surface of the metal support is provided with a second insulating plating, the metal support including a second side facing the fingerprint unit, the second insulating plating covering the second side.
16. The electronic device of claim 15, wherein the metal bracket comprises a third side facing the USB socket, and wherein the second insulating layer covers the third side.
17. The electronic device of claim 16, wherein the metal bracket further comprises a seventh side surface, the seventh side surface connecting the second side surface and the third side surface, the second insulating layer covering the seventh side surface.
18. The electronic device of claim 15, wherein the thickness of the second insulating plating layer is greater than the thickness of the first insulating plating layer.
CN201711211002.5A 2017-11-28 2017-11-28 Electronic device Active CN107995330B (en)

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2017101068A1 (en) * 2015-12-17 2017-06-22 华为技术有限公司 Mobile communication terminal
CN206323420U (en) * 2016-12-07 2017-07-11 广东欧珀移动通信有限公司 Apparatus assembly and mobile terminal applied to mobile terminal
CN106982275A (en) * 2017-04-13 2017-07-25 广东欧珀移动通信有限公司 Barrier assembly and mobile terminal
CN107275755A (en) * 2017-05-31 2017-10-20 广东欧珀移动通信有限公司 A kind of housing unit and mobile terminal

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2017101068A1 (en) * 2015-12-17 2017-06-22 华为技术有限公司 Mobile communication terminal
CN206323420U (en) * 2016-12-07 2017-07-11 广东欧珀移动通信有限公司 Apparatus assembly and mobile terminal applied to mobile terminal
CN106982275A (en) * 2017-04-13 2017-07-25 广东欧珀移动通信有限公司 Barrier assembly and mobile terminal
CN107275755A (en) * 2017-05-31 2017-10-20 广东欧珀移动通信有限公司 A kind of housing unit and mobile terminal

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