WO2022213995A1 - Carte de circuit imprimé et dispositif électronique - Google Patents

Carte de circuit imprimé et dispositif électronique Download PDF

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Publication number
WO2022213995A1
WO2022213995A1 PCT/CN2022/085361 CN2022085361W WO2022213995A1 WO 2022213995 A1 WO2022213995 A1 WO 2022213995A1 CN 2022085361 W CN2022085361 W CN 2022085361W WO 2022213995 A1 WO2022213995 A1 WO 2022213995A1
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WO
WIPO (PCT)
Prior art keywords
circuit board
substrate layer
antenna
antenna unit
slot
Prior art date
Application number
PCT/CN2022/085361
Other languages
English (en)
Chinese (zh)
Inventor
王义金
简宪静
刘洋
荆珍
Original Assignee
维沃移动通信有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 维沃移动通信有限公司 filed Critical 维沃移动通信有限公司
Publication of WO2022213995A1 publication Critical patent/WO2022213995A1/fr

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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00—Details of, or arrangements associated with, antennas
    • H01Q1/48—Earthing means; Earth screens; Counterpoises
    • 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
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00—Details of, or arrangements associated with, antennas
    • H01Q1/36—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith
    • H01Q1/38—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith formed by a conductive layer on an insulating support
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00—Details of, or arrangements associated with, antennas
    • H01Q1/50—Structural association of antennas with earthing switches, lead-in devices or lightning protectors
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00—Details of, or arrangements associated with, antennas
    • H01Q1/52—Means for reducing coupling between antennas; Means for reducing coupling between an antenna and another structure
    • H01Q1/521—Means for reducing coupling between antennas; Means for reducing coupling between an antenna and another structure reducing the coupling between adjacent antennas
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q21/00—Antenna arrays or systems
    • H01Q21/0006—Particular feeding systems
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q5/00—Arrangements for simultaneous operation of antennas on two or more different wavebands, e.g. dual-band or multi-band arrangements
    • H01Q5/20—Arrangements for simultaneous operation of antennas on two or more different wavebands, e.g. dual-band or multi-band arrangements characterised by the operating wavebands
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q5/00—Arrangements for simultaneous operation of antennas on two or more different wavebands, e.g. dual-band or multi-band arrangements
    • H01Q5/30—Arrangements for providing operation on different wavebands
    • H01Q5/307—Individual or coupled radiating elements, each element being fed in an unspecified way
    • H01Q5/342—Individual or coupled radiating elements, each element being fed in an unspecified way for different propagation modes
    • H01Q5/357—Individual or coupled radiating elements, each element being fed in an unspecified way for different propagation modes using a single feed point
    • H01Q5/364—Creating multiple current paths
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q5/00—Arrangements for simultaneous operation of antennas on two or more different wavebands, e.g. dual-band or multi-band arrangements
    • H01Q5/50—Feeding or matching arrangements for broad-band or multi-band operation

Definitions

  • the present application belongs to the technical field of electronic equipment, and specifically relates to a circuit board and electronic equipment.
  • Ultra Wide Band UWB
  • the technology to realize these functions is Ultra Wide Band (UWB) technology, which has high requirements on the performance of the antenna, including the broadband and phase characteristics of the antenna. , group delay in space angle, etc.
  • multiple patch antennas are generally used on the flexible circuit board. Since the free space wavelength corresponding to the working frequency of the UWB antenna is close to 38mm, and the positioning of UWB often requires a combination of multiple antennas, the antenna needs The larger vacant space, therefore, needs to occupy a larger space for the electronic device.
  • the thickness of the flexible circuit board is thinner, which brings about a narrower antenna bandwidth, while the single band (Channel) of UWB needs to cover 500MHz, which makes the peak efficiency of resonance higher and the band edge efficiency.
  • Lower that is, the gain gap of each frequency in the entire band is large, and the larger the gain, the lower the relative conduction power, which affects the communication distance and effect of the entire UWB system.
  • the embodiments of the present application provide a circuit board and an electronic device, which can solve the problem that the antenna needs to occupy a large space of the electronic device during the positioning of the existing electronic device, and the large gain reduces the conduction power, which affects the communication distance and effect of the entire UWB system. question.
  • a circuit board comprising: a first substrate layer, a second substrate layer and a third substrate layer;
  • a metal ground and at least two antenna units are arranged on the first substrate layer, a metal ground is arranged between any two antenna units, and a first feeding contact point is arranged on each of the antenna units, and each antenna unit is provided with a first feeding contact point.
  • Each of the antenna units and the metal ground is isolated by a first slot, and each of the antenna units is provided with a second slot, wherein the first feeding contact point is arranged on the antenna unit. non-central;
  • the second substrate layer is provided with a metal ground, an insulating portion that isolates the metal ground on the second substrate layer from each of the antenna units on the first substrate layer, and the first substrate layer.
  • At least two second feeding contacts and at least two transmission lines corresponding to the feeding contacts the first end of each transmission line is connected to the corresponding second feeding contact, wherein each of the transmission lines is connected to the corresponding second feeding contact.
  • the second feed contacts are all connected to the corresponding first feed contacts on the first substrate layer;
  • the third substrate layer is provided with a metal ground and at least two contact points, each of the contact points is connected to the second end of the corresponding transmission line on the second substrate layer, at least two of the contact points point is used to connect the RF unit;
  • the metal ground of the first substrate layer, the metal ground of the second substrate layer, and the metal ground of the third substrate layer share the same ground.
  • an electronic device including: a middle case assembly, a main circuit board, a bracket, and the circuit board described in the first aspect;
  • the main circuit board is arranged on the middle case assembly
  • the bracket is disposed on the side of the main circuit board away from the middle shell assembly, and the bracket is used for fixing the main circuit board to the middle shell assembly;
  • the circuit board is arranged on the side of the bracket away from the main circuit board;
  • the middle shell assembly, the main circuit board and the bracket share the same ground.
  • An embodiment of the present application discloses a circuit board, which includes a first substrate layer, a second substrate layer and a third substrate layer; the first substrate layer is provided with a metal ground and at least two antenna units, any two antenna units A metal ground is arranged between them, a first feeding contact point is arranged on each antenna unit, and each antenna unit is isolated from the metal ground by a first slot, and a second antenna unit is opened on each antenna unit.
  • each second feeding contact point is connected to the corresponding first feeding contact point on the first substrate layer;
  • the third substrate layer is provided with a metal ground and at least two contact points, each contact point is connected to the second substrate The second end of the corresponding transmission line on the layer is connected, and at least two contact points are used for connecting the radio frequency unit; wherein, the metal ground of the first substrate layer, the metal ground of the second substrate layer and the metal ground of the third substrate layer share the ground.
  • the first slot is provided to isolate the antenna unit from the metal ground
  • the second slot is used to increase the path length of the current in the working frequency band of the antenna unit, so as to reduce the area of each antenna unit, reduce the space occupied by the antenna, and at the same time It will not have a great influence on the directional characteristics of the antenna, which can ensure the measurement accuracy of UWB.
  • the second slot When the second slot is not connected to the first slot, by setting the position of the second slot reasonably, it can be used as the impedance adjuster of the antenna, so that the in-band standing wave of the antenna unit covering multiple UWB frequency bands can be better optimized. Improve the smoothness of standing waves, and improve the efficiency of the antenna in the band and the flatness of the gain, so as to reduce the influence of the maximum gain on the conduction, and improve the ranging distance of the UWB antenna.
  • the performance of the antenna can be adjusted more conveniently and quickly, and the problem of poor frequency response characteristics of the centralized parameter device at high frequencies is avoided, that is, the inductance or capacitance varies with frequency. It increases the height of the antenna and the gap between the actual value and the nominal value is large, which increases the difficulty of design and debugging of the antenna when matching, and the problem of poor consistency during mass production.
  • FIG. 1 is a schematic diagram of a first substrate layer of a circuit board provided by an embodiment of the present application
  • FIG. 2 is a schematic diagram of a second substrate layer of a circuit board provided by an embodiment of the present application.
  • FIG. 3 is a schematic diagram of a third substrate layer of a circuit board provided by an embodiment of the present application.
  • FIG. 4 is a schematic diagram of an antenna unit of a circuit board provided by an embodiment of the present application.
  • FIG. 5 is a schematic diagram of another antenna unit of a circuit board provided by an embodiment of the present application.
  • FIG. 6 is a schematic structural diagram of an electronic device provided by an embodiment of the present application.
  • 10-electronic equipment 11-middle shell assembly, 12-main circuit board, 13-support, 14-circuit board, 141-first substrate layer, 1411-first antenna unit, 14111-first slot, 14112- 2nd slot, 14113-first feed contact point, 14114-third slot, 1412-second antenna unit, 1413-third antenna unit, 1414-metal ground, 142-second substrate layer, 1421-second feeder Electrical contact point, 1422-transmission line, 1423-metal ground, 143-third substrate layer, 1431-contact point, 1432-metal ground.
  • circuit board 14 and the electronic device 10 provided by the embodiments of the present application will be described in detail below through specific embodiments and application scenarios with reference to the accompanying drawings.
  • the circuit board 14 may include: a first substrate layer 141 , a second substrate layer 142 and a third substrate layer 143 .
  • the first substrate layer 141 , the second substrate layer 142 and the third substrate layer 143 are sequentially stacked to form a circuit board.
  • the first substrate layer 141 is provided with a metal ground 1414 and at least two antenna units, a metal ground 1414 is provided between any two antenna units, and each antenna unit is provided with a first feeding contact point 14113 , and each antenna unit is isolated from the metal ground 1414 by the first slot 14111, and each antenna unit is provided with a second slot 14112, wherein the first feeding contact point 14113 is arranged at the non-center of the antenna unit;
  • the second substrate layer 142 is provided with a metal ground 1423, an insulating portion that isolates the metal ground 1423 on the second substrate layer from each antenna element on the first substrate layer 141, and is in phase with the first feeding contact point 14113.
  • each transmission line 1422 is connected to its corresponding second feeding contact 1421, wherein each second feeding contact
  • the points 1421 are all connected to the corresponding first feeding contact points 14113 on the first substrate layer 141
  • the third substrate layer 143 is provided with a metal ground 1432 and at least two contact points 1431, each contact point 1431 is connected to the second substrate
  • the second end of the corresponding transmission line 1422 on the layer 142 is connected, and at least two contact points 1431 are used to connect the radio frequency unit, so as to facilitate the establishment of signal connection between the antenna unit and the UWB transceiver between the main circuit board; wherein, the metal of the first substrate layer 141
  • the ground 1414 , the metal ground 1423 of the second substrate layer 142 and the metal ground 1432 of the third substrate layer 143 share the same ground.
  • the antenna unit and the metal ground can be isolated through the first slot, and the path length of the current in the working frequency band of the antenna unit can be increased through the second slot, thereby reducing the area of the antenna.
  • the second slot may be communicated with the first slot, or the second slot may not be communicated with the first slot (not shown in the figure), and the number of the second slot is not limited and can be determined according to the actual situation.
  • the second slot When the second slot is not connected to the first slot, by setting the position of the second slot reasonably, it can be used as an impedance adjuster of the antenna, which can better optimize the in-band standing wave covering the antenna unit of multiple UWB frequency bands, and improve the standing wave.
  • the smoothness of the wave can be improved, and the efficiency of the antenna in the band and the flatness of the gain can be improved, so as to reduce the influence of the maximum gain on the conduction and improve the ranging distance of the UWB antenna.
  • the performance of the antenna can be adjusted more conveniently and quickly, and the problem of poor frequency response characteristics of the centralized parameter device at high frequencies is avoided, that is, the inductance or capacitance varies with frequency. It increases the height of the antenna and the gap between the actual value and the nominal value is large, which increases the difficulty of design and debugging of the antenna when matching, and the problem of poor consistency during mass production.
  • the non-center can set the first feeding contact point 14113 at any non-center position of the antenna unit, such as the upper left corner, upper right corner, etc., so that the antenna unit can work in various frequency bands.
  • a metal ground 1414 is arranged between any two antenna units, which can further increase the interval between any two antenna units and avoid mutual influence.
  • the circuit board 14 provided in the present application may be a flexible circuit board.
  • the first groove, the second groove, and the insulating part can all be filled with any industrialized liquid crystal polymer (Liquid Crystal Polymer, LCP), modified polyimide (Modified PI, MPI), polyimide (Polyimide, PI), etc.
  • LCP Liquid Crystal Polymer
  • Modified PI, MPI modified polyimide
  • Polyimide Polyimide
  • a material to achieve insulation Alternatively, an antenna circuit or a metal ground is formed on each layer of the substrate through processes such as copper plating, and other parts are not plated with copper to serve as an insulating area.
  • the second ends of each transmission line are disconnected from each other.
  • the mutually independent second ends are connected to different feed signals.
  • each transmission line is connected to each other, a phase shifter is added to the transmission line, and the same feed signal is subjected to differential adjustment such as phase adjustment through the phase shifter, so as to reach the feed at the first end of the transmission line. Signals are different.
  • the circuit board 14 may include a first substrate layer 141, a second substrate layer 142 and a third substrate layer 143; the first substrate layer 141 is provided with a metal ground 1414 and at least two antenna units, any A metal ground 1414 is arranged between the two antenna units, a first feeding contact point 14113 is arranged on each antenna unit, and each antenna unit and the metal ground 1414 are isolated by a first slot 14111, each A second slot 14112 is formed on each antenna unit, wherein the first feeding contact point 14113 is set at the non-center of the antenna unit; a metal ground 1423 is set on the second substrate layer 142, and the metal ground on the second substrate layer 142 is set 1423 insulation from each antenna element on the first substrate layer 141, at least two second feed contacts 1421 corresponding to the first feed contacts 14113, at least two transmission lines 1422, each transmission line 1422 The first ends of each are connected to their corresponding second feed contacts 1421, wherein each second feed contact 1421 is connected to the corresponding first feed contacts
  • the first slot 14111 is provided to isolate the antenna unit from the metal ground 1414, and the second slot 14112 is used to increase the path length of the current in the working frequency band of the antenna unit, so as to reduce the area of each antenna unit, thereby reducing the occupation of the antenna. At the same time, it will not have a great impact on the directional characteristics of the antenna, which can ensure the measurement accuracy of UWB.
  • the first slot 14111 may be a closed ring formed around the antenna unit, or may be a non-closed ring formed by half surrounding the antenna unit. For example, when the area adjacent to one side of the antenna unit is not provided with a metal ground, the first slot does not need to be provided, and the first slot forms a non-closed semi-circular shape.
  • the second groove 14112 communicates with the first groove 14111 .
  • the second slot 14112 and the first slot 14111 are integrally arranged, wherein the first slot 14111 is arranged around the antenna unit, and the second slot 14112 extends from the first slot to the inside of the antenna unit, on at least one side of the antenna unit A gap is formed to increase the path length of the current in a certain frequency band.
  • the position and direction of the second groove are not limited, and can be set according to actual conditions.
  • the circuit board may further include a third groove 14114.
  • the third slot 14114 is an opening formed on the antenna unit, the second slot extends along the first direction, the third slot extends along the second direction, and there is an included angle between the first direction and the second direction.
  • the third slot is a slot that is not connected to the first slot and the second slot.
  • the direction has a certain angle, for example, the angle is an acute angle or a right angle, that is, the first direction and the second direction are not in the same direction, so that the current path length can be increased under various working states of the antenna unit, and the Small size in different directions, thereby reducing the overall area of the antenna unit.
  • the first direction is a direction parallel to the current direction of the first operating frequency band of the antenna unit.
  • the second slot is used to increase the path length of the current of the second working frequency band of the antenna unit
  • the third slot is used to increase the path length of the current of the first working frequency band and/or the path length of the current of the second working frequency band, wherein , the current flow direction of the second working frequency band is perpendicular to the current flow direction of the first working frequency band.
  • the first direction is set as the current direction of the antenna unit in a certain working frequency band.
  • the second slot can be used to increase the path length of the current of the second working frequency band of the antenna unit, and the third slot can be used to increase the current path length.
  • the path length of the current in the first working frequency band and/or the path length of the current in the second working frequency band that is, when the angle between the extending direction of the third slot and the extending direction of the second slot is an acute angle, the third slot can increase the number of The path length of the current in one working frequency band and the path length of the current in the second working frequency band, if the included angle between the extending direction of the third slot and the extending direction of the second slot is a right angle, the third slot can increase the path length of the first working frequency band.
  • the path length of the current The overall size of the antenna unit can be reduced.
  • the third slot can also be used as an impedance adjuster, so that the standing wave in the working frequency band becomes smooth, so as to improve the antenna unit in the working frequency band.
  • the gain flatness is better, reducing the influence of the gain on the conduction, and improving the communication distance of the antenna unit.
  • the antenna unit can be a rectangular patch antenna, which can work in various frequency bands, such as signal (Channel) 5 (6.25GHz--6.75GHz) and Channel 9 (7.75GHz-8.25GHz).
  • the current mainly flows along the first direction
  • the current direction of Channel9 mainly flows along the second direction.
  • the first direction is perpendicular to the second direction.
  • the second slot 14112 can increase the current path length of Channel9 to reduce the antenna.
  • the size of the unit in the second direction, the angle between the extension direction of the third slot and the extension direction of the second slot is an acute angle
  • the third slot 14114 can increase the length of the current path of Channel5 and Channel9, reduce the antenna unit in the first direction and Dimensions in the second direction.
  • the second slot 14112 can also be used as an impedance adjuster for Channel9, which can make the standing wave of Channel9 smoother, so as to improve the gain flatness of the antenna in Channel9.
  • the third slot 14114 is a slot passing through the center of the antenna unit, and the included angle between the second direction and the first direction is 45°.
  • the third slot can be used as an impedance adjuster of the first working frequency band or the second working frequency band.
  • the third slot 14114 can be set as a slot passing through the center of the antenna unit, and the extension direction of the third slot 14114 has a certain angle with the current direction of the antenna unit in another operating frequency band, and the preferred angle is 45. °.
  • This arrangement can reduce the area of the antenna unit, reduce the space occupation and manufacturing cost of the antenna, and basically does not change the directional characteristics of the antenna unit, and does not affect the measurement accuracy of the antenna. It becomes smooth to improve the gain flatness of the antenna unit in the working frequency band, reduce the influence of the gain on the conduction, and improve the communication distance of the UWB antenna system.
  • the third slot 14114 includes two sub-slots, and the two sub-slots are arranged to intersect.
  • the third slot 14114 may include two sub-slots, and the two sub-slots are arranged to intersect, which can increase the path lengths of currents in different directions, thereby reducing the size of the antenna unit.
  • the second slot 14112 extends along the first direction, and both the extending directions of the two sub-slots have an included angle with the first direction.
  • the extension direction of the second groove 14112 is set as the first direction
  • the first direction can be any direction
  • the two sub-slots have an included angle with the first direction
  • the two sub-slots are set to intersect , that is, one of the sub-slots is in one direction, and the other sub-slot is in the other direction, so that when the antenna unit works in different frequency bands, the path length of the current can be increased, and the overall antenna unit can be reduced. size.
  • both the two sub-slots have an included angle with the first direction
  • the two sub-slots can be used as impedance adjusters for two different working frequency bands, so that at least two standing waves can be adjusted so that the The standing wave is smoother to improve the gain flatness of the antenna unit in the corresponding working frequency band, reduce the influence of the gain on the conduction, and improve the communication distance of the UWB antenna system.
  • the first direction is a direction parallel to the current direction of the first working frequency band of the antenna unit, the intersection of the two sub-slots coincides with the center of the antenna unit, the two sub-slots are arranged perpendicular to each other, and both are clamped in the first direction.
  • the angle is 45°.
  • the path length of the current in the first direction of the frequency band can be increased, that is, the size of the antenna unit in this direction can be reduced.
  • the included angle between the two sub-slots and the first direction is 45°, and the two sub-slots are arranged vertically, which can not only increase the path length of the current in the first direction of the frequency band, but also increase the operation of the antenna unit in another
  • the path length of the current in the frequency band that is, the path length of the current of the antenna unit in various operating frequency bands can be increased, and the overall size of the antenna unit can be further reduced.
  • the influence of gain on conduction can be reduced to the greatest extent, and the communication distance of the UWB antenna system can be improved.
  • the lengths of the two sub-slots are different.
  • the lengths of the two sub-slots can be set as impedance adjusters for different frequency bands, so that the two sub-slots can better adjust the smoothness of the standing waves in the corresponding working frequency bands.
  • the portion of the second substrate layer 142 facing the antenna unit on the first substrate layer 141 is provided with a clearance area.
  • a clearance area may be provided on the second substrate layer 142 to increase the height of the antenna.
  • the projection of the antenna element is within the headroom, and at least part of the headroom is outside the projection of the antenna element.
  • the area of the clearance area may be larger than the projected area of the antenna unit to further increase the height of the antenna.
  • the at least two antenna units include a first antenna unit 1411, a second antenna unit 1412 and a third antenna unit 1413, and the first antenna unit and the second antenna unit are distributed along the first direction, The second antenna unit and the third antenna unit are distributed along a second direction, and the first direction is perpendicular to the second direction.
  • the angle or distance in the first plane can be measured; when the second antenna and the third antenna work at the same time, the angle or distance in the second plane can be measured. distance; the first plane and the second plane are perpendicular to each other.
  • the distribution on the substrate layer 141 resembles an L-shaped structure.
  • the three antenna units there may be three antenna units, and the three antenna units may be arranged in an L-shape.
  • the angle in the first plane or the Distance when the first antenna and the second antenna work at the same time, the angle in the first plane or the Distance; when the second antenna and the third antenna work at the same time, the angle or distance in the second plane can be measured, that is, the data in one plane can be measured through any two of them, and the data in one plane can be measured through three antenna elements.
  • the number of antennas may also be other numbers.
  • each second feeding contact point 1421 is connected to the corresponding first feeding contact point 14113 on the first substrate layer 141 through a via hole; each contact point 1431 is connected to the second substrate layer 142
  • the second ends of the corresponding transmission lines 1422 are connected through vias; the metal ground 1414 of the first substrate layer 141 , the metal ground 1423 of the second substrate layer 142 and the metal ground 1432 of the third substrate layer 143 are connected to the common ground through the through holes .
  • connections between different layers are connected through vias.
  • Electrical connectors may be filled in the via holes, or metal walls may be provided in the via holes as electrical connectors.
  • an embodiment of the present application further provides an electronic device 10 , and the electronic device 10 may include: a middle case assembly 11 , a main circuit board 12 , a bracket 13 and the circuit board 14 provided in any of the foregoing embodiments.
  • the electronic device may also include structures such as a battery, a display screen, a front case, a rear case, etc. Considering the brevity of the text, this application will not describe them one by one.
  • the main circuit board 12 is disposed on the middle shell assembly 11; the bracket 13 is disposed on the side of the main circuit board 12 away from the middle shell assembly 11, and the bracket 13 is used to fix the main circuit board 12 to the middle shell assembly 11; the circuit board 14 It is arranged on the side of the bracket 13 away from the main circuit board 12 ; wherein, the middle shell assembly 11 , the main circuit board 12 and the bracket 13 share the same ground.
  • the middle shell assembly is used to connect the front shell and the rear shell of the device, and can be used as the installation base of the main circuit board, the main circuit board can be installed in the middle shell assembly, and the middle shell assembly can provide protection for the main circuit board.
  • the antenna unit and the metal ground are isolated by the first slot arranged around the antenna, and the path length of the current in the working frequency band of the antenna unit is increased by the second slot, To reduce the area of each antenna unit and the space occupied by the antenna, it will not have a great impact on the directional characteristics of the antenna, which can ensure the measurement accuracy of UWB.
  • the projection of the circuit board 14 is located inside the bracket 13 , and at least part of the bracket 13 is located outside the projection of the circuit board 14 .
  • the area of the bracket 13 may be set larger than that of the circuit board 14 as an extension of the ground of the UWB antenna.
  • the method of the above embodiment can be implemented by means of software plus a necessary general hardware platform, and of course can also be implemented by hardware, but in many cases the former is better implementation.
  • the technical solution of the present application can be embodied in the form of a software product in essence or in a part that contributes to the prior art, and the computer software product is stored in a storage medium (such as ROM/RAM, magnetic disk, CD-ROM), including several instructions to make a terminal (which may be a mobile phone, a computer, a server, an air conditioner, or a network device, etc.) execute the methods described in the various embodiments of this application.
  • a storage medium such as ROM/RAM, magnetic disk, CD-ROM

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Abstract

La présente invention se rapporte au domaine technique des dispositifs électroniques et concerne une carte de circuit imprimé et un dispositif électronique. La carte de circuit imprimé comprend une première couche de substrat, une deuxième couche de substrat et une troisième couche de substrat ; la première couche de substrat comporte une masse métallique et au moins deux unités d'antenne, chaque unité d'antenne comporte un premier point de contact d'alimentation, chaque unité d'antenne est isolée de la masse métallique au moyen d'une première fente, et chaque unité d'antenne comporte une seconde fente ; la deuxième couche de substrat comporte une masse métallique, une partie isolante qui isole la masse métallique de chaque unité d'antenne, au moins deux seconds points de contact d'alimentation correspondant aux premiers points de contact d'alimentation, et au moins deux lignes de transmission ; la troisième couche de substrat comporte un sol métallique et au moins deux points de contact ; toutes les masses métalliques sont reliées l'une à l'autre.
PCT/CN2022/085361 2021-04-09 2022-04-06 Carte de circuit imprimé et dispositif électronique WO2022213995A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN202110387347.6A CN113178697B (zh) 2021-04-09 2021-04-09 电路板及电子设备
CN202110387347.6 2021-04-09

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Publication Number Publication Date
WO2022213995A1 true WO2022213995A1 (fr) 2022-10-13

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