CN113178697A - Circuit board and electronic equipment - Google Patents
Circuit board and electronic equipment Download PDFInfo
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- CN113178697A CN113178697A CN202110387347.6A CN202110387347A CN113178697A CN 113178697 A CN113178697 A CN 113178697A CN 202110387347 A CN202110387347 A CN 202110387347A CN 113178697 A CN113178697 A CN 113178697A
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- 239000002184 metal Substances 0.000 claims abstract description 60
- 229910052751 metal Inorganic materials 0.000 claims abstract description 60
- 230000005540 biological transmission Effects 0.000 claims abstract description 21
- 238000004891 communication Methods 0.000 claims description 9
- 150000002739 metals Chemical class 0.000 abstract 1
- 238000000034 method Methods 0.000 description 11
- 238000010586 diagram Methods 0.000 description 7
- 238000005259 measurement Methods 0.000 description 7
- 230000001154 acute effect Effects 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 239000004642 Polyimide Substances 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 229920001721 polyimide Polymers 0.000 description 3
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 2
- 229920000106 Liquid crystal polymer Polymers 0.000 description 2
- 239000004977 Liquid-crystal polymers (LCPs) Substances 0.000 description 2
- 238000010923 batch production Methods 0.000 description 2
- 229910052802 copper Inorganic materials 0.000 description 2
- 239000010949 copper Substances 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 206010063385 Intellectualisation Diseases 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000004069 differentiation Effects 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
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- 238000007747 plating Methods 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
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Classifications
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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
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/12—Supports; Mounting means
- H01Q1/22—Supports; Mounting means by structural association with other equipment or articles
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/36—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
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/50—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
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q21/00—Antenna arrays or systems
- H01Q21/0006—Particular feeding systems
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- 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
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- 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
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- 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
Abstract
The application discloses circuit board and electronic equipment belongs to electronic equipment technical field. The circuit board comprises 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 first feed contact point is arranged on each antenna unit, each antenna unit is isolated from the metal ground through a first groove, and a second groove is formed in each antenna unit; a metal ground, an insulating part for isolating the metal ground from each antenna unit, at least two second feeding contact points corresponding to the first feeding contact points and at least two transmission lines are arranged on the second substrate layer; a metal ground and at least two contact points are arranged on the third substrate layer; all metals are grounded. Through setting up isolated antenna unit of first groove and metal ground, increase the path length of the electric current of the operating frequency channel of antenna unit through the second groove, reduce antenna unit's area, and then reduce the space that the antenna occupy.
Description
Technical Field
The application belongs to the technical field of electronic equipment, and particularly relates to a circuit board and electronic equipment.
Background
With the development of 5G communication technology, the world of everything interconnection is coming, and users have more and more requirements on the functions of electronic devices, for example, higher requirements on convenience, intellectualization and the like of the electronic devices are provided. The important applications of electronic devices are indoor positioning and ranging, and the technologies for implementing these functions are Ultra Wide Band (UWB) technologies, which have high requirements on the performance of antennas, including the wideband, phase characteristics, and group delay in spatial angles of the antennas.
Therefore, in order to obtain better characteristics, a plurality of patch antennas are generally arranged on a flexible circuit board, and since the free space wavelength corresponding to the working frequency point of the UWB antenna is close to 38mm, positioning of the UWB antenna often requires combination of a plurality of antennas, and the antennas require a large empty space, and therefore occupy a large space of the electronic device.
Meanwhile, the electronic device is sensitive to the thickness of the whole device, the flexible circuit board is thin, the bandwidth of the antenna is narrow, and a single wave band (Channel) of the UWB needs to cover 500MHz, so that the peak efficiency of resonance is high, the frequency band edge efficiency is low, that is, the gain difference of each frequency in the whole band is large, the gain is large, the relative conducted power is reduced, and the communication distance and the effect of the whole UWB system are affected.
Disclosure of Invention
The embodiment of the application provides a circuit board and electronic equipment, can solve the problem that the antenna needs to occupy the larger space of the electronic equipment when the existing electronic equipment is positioned, and the larger gain reduces the conducted power, thereby influencing the communication distance and the effect of the whole UWB system.
In order to solve the technical problem, the present application is implemented as follows:
in a first aspect, a circuit board is provided, including: 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, the metal ground is arranged between any two antenna units, a first feed contact point is arranged on each antenna unit, each antenna unit is isolated from the metal ground through a first groove, a second groove is formed in each antenna unit, and the first feed contact point is arranged in the non-center of the antenna unit;
the second substrate layer is provided with a metal ground, an insulating part for isolating the metal ground on the second substrate layer from each antenna unit on the first substrate layer, at least two second feeding contact points corresponding to the first feeding contact points, and at least two transmission lines, wherein the first end of each transmission line is connected with the corresponding second feeding contact point, and each second feeding contact point is connected with the corresponding first feeding contact point on the first substrate layer;
a metal ground and at least two contact points are arranged on the third substrate layer, each contact point is connected with the second end of the corresponding transmission line on the second substrate layer, and the at least two contact points are used for connecting a radio frequency unit;
wherein a metal ground of the first substrate layer, a metal ground of the second substrate layer, and a metal ground of the third substrate layer are co-grounded.
In a second aspect, an electronic device is provided, comprising: a mid-shell assembly, a main circuit board, a bracket and the circuit board of the first aspect;
the main circuit board is arranged on the middle shell assembly;
the bracket is arranged on one side of the main circuit board, which is far away from the middle shell assembly, and is used for fixing the main circuit board on the middle shell assembly;
the circuit board is arranged on one side of the support, which is far away from the main circuit board;
wherein the mid-shell assembly, the main circuit board and the bracket are commonly grounded.
The embodiment of the application discloses a circuit board, which comprises 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, the metal ground is arranged between any two antenna units, a first feed contact point is arranged on each antenna unit, each antenna unit is isolated from the metal ground through a first groove, a second groove is formed in each antenna unit, and the first feed contact point is arranged at the non-center of each antenna unit; the second substrate layer is provided with a metal ground, an insulating part for isolating the metal ground on the second substrate layer from each antenna unit on the first substrate layer, at least two second feeding contact points corresponding to the first feeding contact points, and at least two transmission lines, wherein the first end of each transmission line is connected with the corresponding second feeding contact point, and each second feeding contact point is connected with the corresponding first feeding contact point on the first substrate layer; a metal ground and at least two contact points are arranged on the third substrate layer, each contact point is connected with the second end of the corresponding transmission line on the second substrate layer, and the 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 are commonly grounded. This application embodiment increases the path length of the electric current of the operating frequency channel of antenna element through the second groove through setting up isolated antenna element of first groove and metal ground, reduces the area of every antenna element, reduces the space that the antenna occupy, does not have great influence to the directional characteristic of antenna simultaneously, can guarantee UWB's measurement accuracy.
When the second groove is not communicated with the first groove, the position of the second groove is reasonably arranged, and the second groove can be used as an impedance regulator of the antenna, so that the in-band standing wave of the antenna unit covering multiple UWB frequency bands is better optimized, the smoothness of the standing wave is improved, the efficiency of the antenna in the band and the flatness of the gain can be improved, the influence of the maximum gain on the conduction is reduced, and the distance measurement distance of the UWB antenna is improved.
Through set up impedance adjuster on the antenna body, accomplish the performance of more convenient and fast's adjustment antenna, avoided the relatively poor problem of the corresponding characteristic of frequency of lumped parameter device when the high frequency, be that sense value or appearance value are along with increasing of frequency and actual value and nominal value difference are big etc. promptly, increase the design debugging degree of difficulty of antenna when matching as him to and the poor problem of uniformity when batch production.
Drawings
The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the application and together with the description serve to explain the application and not to limit the application. In the drawings:
fig. 1 is a schematic diagram of a first substrate layer of a circuit board provided by one 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 element of a circuit board provided by one embodiment of the present application;
fig. 6 is a schematic structural diagram of an electronic device according to an embodiment of the present application.
Among these, 10-electronics, 11-mid-shell component, 12-main circuit board, 13-bracket, 14-circuit board, 141-first substrate layer, 1411-first antenna element, 14111-first slot, 14112-second slot, 14113-first feed contact, 14114-third slot, 1412-second antenna element, 1413-third antenna element, 1414-metal ground, 142-second substrate layer, 1421-second feed contact, 1422-transmission line, 1423-metal ground, 143-third substrate layer, 1431-contact, 1432-metal ground.
Detailed Description
The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some, but not all, embodiments of the present application. 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 application.
The terms first, second and the like in the description and in the claims of the present application are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the application are capable of operation in sequences other than those illustrated or described herein. In addition, "and/or" in the specification and claims means at least one of connected objects, a character "/" generally means that a preceding and succeeding related objects are in an "or" relationship.
A circuit board 14 and an electronic device 10 provided in the embodiments of the present application are described in detail below with reference to the accompanying drawings through specific embodiments and application scenarios thereof.
Fig. 1-5 are schematic structural diagrams of a circuit board 14 according to an embodiment of the present disclosure. 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.
Specifically, a metal ground 1414 and at least two antenna units are disposed on the first substrate layer 141, the metal ground 1414 is disposed between any two antenna units, a first feeding contact point 14113 is disposed on each antenna unit, each antenna unit is isolated from the metal ground 1414 by a first groove 14111, a second groove 14112 is disposed on each antenna unit, and the first feeding contact point 14113 is disposed at the non-center of the antenna unit; a metal ground 1423, an insulating part for isolating the metal ground 1423 on the second substrate layer from each antenna unit on the first substrate layer 141, at least two second feeding contact points 1421 corresponding to the first feeding contact point 14113, and at least two transmission lines 1422 are disposed on the second substrate layer 142, a first end of each transmission line 1422 is connected to the corresponding second feeding contact point 1421, wherein each second feeding contact point 1421 is connected to the corresponding first feeding contact point 14113 on the first substrate layer 141; a metal ground 1432 and at least two contact points 1431 are disposed on the third substrate layer 143, each contact point 1431 is connected to the second end of the corresponding transmission line 1422 on the second substrate layer 142, and the at least two contact points 1431 are used for connecting a radio frequency unit, so that a signal connection is established between the antenna unit and the UWB transceiver between the main circuit boards; wherein the metallic ground 1414 of the first substrate layer 141, the metallic ground 1423 of the second substrate layer 142, and the metallic ground 1432 of the third substrate layer 143 are commonly grounded.
That is, the antenna unit and the metal ground can be isolated by the first slot, and the path length of the current of the operating frequency band of the antenna unit can be increased by the second slot, so as to reduce the area of the antenna, wherein, as shown in fig. 1, 4 and 5, 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 groove is arranged on the surface of the antenna, the current path length of the current of at least one waveband on the antenna is increased, so that the area of each antenna unit is reduced, the manufacturing cost and the space occupation of the antenna are reduced, the directivity characteristic of the antenna unit is not greatly changed, and the angle measurement accuracy of the UWB antenna can be ensured;
when the second groove is not communicated with the first groove, the position of the second groove is reasonably arranged to be used as an impedance regulator of the antenna, so that the in-band standing wave covering the multi-UWB frequency band antenna unit can be well optimized, the smoothness of the standing wave is improved, the efficiency of the antenna in the band and the flatness of the gain can be improved, the influence of the maximum gain on the conduction is reduced, and the distance measurement distance of the UWB antenna is improved.
Through set up impedance adjuster on the antenna body, accomplish the performance of more convenient and fast's adjustment antenna, avoided the relatively poor problem of the corresponding characteristic of frequency of lumped parameter device when the high frequency, be that sense value or appearance value are along with increasing of frequency and actual value and nominal value difference are big etc. promptly, increase the design debugging degree of difficulty of antenna when matching as him to and the poor problem of uniformity when batch production.
The non-center may be any place on the antenna element, such as the upper left corner, the upper right corner, etc., where the first feeding contact point 14113 is located, so that the antenna element can operate in multiple frequency bands. The metal ground 1414 is arranged between any two antenna units, so that the interval between any two antenna units can be further increased, and the mutual influence of the two antenna units can be avoided.
The circuit board 14 provided in the present application may be a flexible circuit board. The first groove, the second groove, and the insulating portion may be filled with any one of materials such as Liquid Crystal Polymer (LCP), Modified Polyimide (MPI), and Polyimide (PI) to achieve an insulating effect. Or, the antenna circuit or the metal ground is formed on each layer of substrate through copper plating and other processes, and other parts are not plated with copper to be used as the insulation area.
In one mode, the second ends of each transmission line are not connected to each other. The independent second terminals are connected with different feeding signals.
In another mode, the second ends of the transmission lines are connected with each other, a phase shifter is added to the transmission lines, and the same feeding signal is subjected to phase adjustment and equal differentiation adjustment through the phase shifter, so that the feeding signals reaching the first ends of the transmission lines are different.
In the embodiment of the present application, the circuit board 14 may include a first substrate layer 141, a second substrate layer 142, and a third substrate layer 143; a metal ground 1414 and at least two antenna units are arranged on the first substrate layer 141, the metal ground 1414 is arranged between any two antenna units, a first feeding contact point 14113 is arranged on each antenna unit, each antenna unit is isolated from the metal ground 1414 through a first groove 14111, a second groove 14112 is arranged on each antenna unit, and the first feeding contact point 14113 is arranged at the non-center of the antenna unit; a metal ground 1423, an insulating part for isolating the metal ground 1423 on the second substrate layer 142 from each antenna unit on the first substrate layer 141, at least two second feeding contacts 1421 corresponding to the first feeding contact 14113, and at least two transmission lines 1422 are disposed on the second substrate layer 142, a first end of each transmission line 1422 is connected to the corresponding second feeding contact 1421, wherein each second feeding contact 1421 is connected to the corresponding first feeding contact 14113 on the first substrate layer 141; a metal ground 1432 and at least two contact points 1431 are provided on the third substrate layer 143, each contact point 1431 is connected to the second end of a corresponding transmission line 1422 on the second substrate layer 142, and the at least two contact points 1431 are used for connecting a radio frequency unit; wherein the metallic ground 1414 of the first substrate layer 141, the metallic ground 1423 of the second substrate layer 142, and the metallic ground 1432 of the third substrate layer 143 are commonly grounded. In the embodiment of the application, the first groove 14111 is arranged to isolate the antenna unit from the metal ground 1414, and the path length of the current of the working frequency band of the antenna unit is increased through the second groove 14112, so that the area of each antenna unit is reduced, the space occupied by the antenna is further reduced, meanwhile, the directional characteristic of the antenna is not greatly influenced, and the measurement accuracy of the UWB can be ensured.
In one embodiment, the first slot 14111 may be a closed loop formed around the antenna element or an open loop formed around the antenna element. For example, when the metal ground is not provided in the region adjacent to one side of the antenna element, the first groove does not need to be provided, and the first groove forms an unclosed semi-loop.
In one possible embodiment of the present application, the second trough 14112 is in communication with the first trough 14111.
That is, the second slot 14112 is integrally disposed with the first slot 14111, wherein the first slot 14111 is disposed around the antenna unit, and the second slot 14112 extends from the first slot into the antenna unit, so as to form a gap on at least one side of the antenna unit, thereby increasing the path length of the current in a certain frequency band.
The position and the direction of the second groove are not limited, and can be set according to actual conditions.
In the case that the second slot 14112 is communicated with the first slot 14111, further, in one possible embodiment of the present application, as shown in fig. 1, 4, and 5, the circuit board may further include a third slot 14114. The third slot 14114 is an opening formed in the antenna unit, the second slot extends along a first direction, the third slot extends along a second direction, and an included angle is formed between the first direction and the second direction.
That is, the third groove is a groove that is not communicated with the first groove and the second groove, the extending direction of the second groove 14112 is set to be the first direction, the first direction may be any direction, the second direction is a direction having a certain included angle with the first direction, for example, the included angle is an acute angle or a right angle, that is, the first direction and the second direction are different directions, so that the path length of the current can be increased under various working states of the antenna unit, the size in different directions is reduced, and the whole area of the antenna unit is further reduced.
Optionally, the first direction is a direction parallel to a current direction of the first operating frequency band of the antenna unit.
The second slot is used for increasing the path length of the current of the second working frequency band of the antenna unit, and the third slot is used for increasing 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.
That is, the first direction is set as the current direction of the antenna unit in a certain working frequency band, at this time, the second slot may be used to increase the path length of the current of the second working frequency band of the antenna unit, and 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, that is, when the included angle between the extending direction of the third slot and the extending direction of the second slot is an acute angle, the third slot may increase the path length of the current of the first working frequency band and the path length of the current of the second working frequency band, and 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 may increase the path length of the current of the first working frequency band. The size of the antenna unit as a whole can be reduced.
Furthermore, when the included angle between the extending direction of the third groove and the extending direction of the second groove is an acute angle, the third groove can also be used as an impedance regulator, so that the standing wave of the working frequency band becomes smooth, the gain flatness of the antenna unit in the working frequency band is improved, the influence of gain on conduction is reduced, and the communication distance of the antenna unit is improved.
Specifically, the antenna unit may be a rectangular patch antenna, which may operate in multiple frequency bands, such as signal (Channel)5(6.25 GHz-6.75 GHz) and Channel9(7.75GHz-8.25GHz), the current of Channel5 of the antenna unit mainly flows along the first direction, the current of Channel9 mainly flows along the second direction, and the first direction is perpendicular to the second direction, in which case, the second slot 14112 may increase the current path length of Channel9 to reduce the size of the antenna unit in the second direction, the extending direction of the third slot forms an acute angle with the extending direction of the second slot, and the third slot 14114 may increase the current path lengths of Channel5 and Channel9 to reduce the size of the antenna unit in the first direction and the second direction. Meanwhile, the second slot 14112 can also be used as an impedance adjuster of the Channel9, so that the standing wave of the Channel9 can be smoother, and the gain flatness of the antenna at the Channel9 can be improved.
As shown in fig. 1 and 4, in one embodiment of the present application, the third slot 14114 is a slot through the center of the antenna element, and the second direction is at an angle of 45 ° to the first direction.
The third slot may be used as an impedance adjuster of the first operating frequency band or the second operating frequency band.
That is, the third slot 14114 may be arranged as a slot through the center of the antenna unit, and the extending direction of the third slot 14114 forms an angle with the current direction of the antenna unit in another operating frequency band, preferably 45 °. By the arrangement, the area of the antenna unit can be reduced, the occupied space and the manufacturing cost of the antenna are reduced, the directivity characteristic of the antenna unit is basically not changed, the measurement accuracy of the antenna is not influenced, and the antenna can be used as an impedance regulator, so that the standing wave of a working frequency band becomes smooth, the gain flatness of the antenna unit in the working frequency band is improved, the influence of gain on conduction is reduced, and the communication distance of a UWB antenna system is improved.
In yet another embodiment of the present application, as illustrated in fig. 5, the third slot 14114 includes two sub-slots that are disposed to intersect.
That is, the third slot 14114 may include two sub-slots, and the two sub-slots are disposed to intersect, so that the path lengths of currents in different directions may be increased, and thus the size of the antenna unit may be reduced.
Optionally, the second slot 14112 extends in a first direction, and the extending direction of both sub slots forms an angle with the first direction.
In this embodiment of the application, the extending direction of the second slot 14112 is set to be the first direction, the first direction may be any direction, an included angle is formed between each of the two sub-slots and the first direction, and the two sub-slots are arranged in an intersecting manner, 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 operates in different frequency bands, the path length of the current can be increased, and the size of the whole antenna unit can be reduced. Furthermore, because two subslots all have an included angle with the first direction, consequently, two subslots can regard as the impedance adjuster of two different working frequency channels for can adjust two at least standing waves, make the standing wave in its frequency band more smooth, in order to promote the gain flatness of antenna unit at corresponding working frequency channel, reduce the influence of gain to the conduction, promote UWB antenna system's communication distance.
Optionally, the first direction is a direction parallel to a current direction of a first operating frequency band of the antenna unit, an intersection point of the two sub-slots coincides with a center of the antenna unit, and the two sub-slots are perpendicular to each other and both form an included angle of 45 ° with the first direction.
That is, the first direction is set as the current direction of the antenna unit in a certain working frequency band, and at this time, 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 the direction can be reduced, and the included angle between the two subslots and the first direction is 45 degrees, and the two subslots are vertically arranged, so that the path length of the current in the first direction of the frequency band can be increased, the path length of the current in another working frequency band of the antenna unit can be increased, that is, the path length of the current in various working frequency bands of the antenna unit can be increased, and the size of the whole antenna unit can be further reduced. And the influence of the gain on the conduction can be reduced to the maximum extent, and the communication distance of the UWB antenna system is increased.
Optionally, the two subslots differ in length.
That is, the lengths of the two subslots can be set to serve as impedance adjusters for different frequency bands, so that the two subslots can better adjust the smoothness of the standing wave of the corresponding operating frequency band.
In one possible embodiment of the present application, the portion of the second substrate layer 142 facing the antenna elements on the first substrate layer 141 is provided with a clearance.
That is, a clearance area may be provided on the second substrate layer 142 to raise the height of the antenna.
Specifically, the projection of the antenna element is located within the clearance zone, and at least a portion of the clearance zone is located outside the projection of the antenna element.
That is, the area of the clearance area may be larger than the projected area of the antenna element to further increase the height of the antenna.
In one possible embodiment of the present application, the at least two antenna units include a first antenna unit 1411, a second antenna unit 1412 and a third antenna unit 1413, the first antenna unit and the second antenna unit are distributed along a 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.
Wherein the angle or distance in the first plane can be measured under the condition that the first antenna and the second antenna work simultaneously; under the condition that the second antenna and the third antenna work simultaneously, the angle or the distance in the second plane can be measured; the first plane and the second plane are arranged perpendicular to each other.
That is, the first antenna unit and the second antenna unit are distributed along a 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, and the distribution of the three antenna units on the first substrate layer 141 is similar to an L-shaped structure.
In the embodiment of the present application, there may be three antenna units, and the three antenna units may be arranged in an L shape, so that, when the first antenna and the second antenna operate simultaneously, an angle or a distance in the first plane may be measured; under the condition that the second antenna and the third antenna work simultaneously, the angle or the distance in the second plane can be measured, namely, the data in one plane can be measured through any two of the second antenna and the third antenna, and the positioning or the ranging in the three-dimensional space can be realized through the three antenna units. In other embodiments of the present application, the number of antennas may be other numbers.
In the present embodiment, each second feed contact 1421 is connected to a corresponding first feed contact 14113 on the first substrate layer 141 by a via; each contact 1431 is connected to a second end of a corresponding transmission line 1422 on the second substrate layer 142 by a via; 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 electrically connected to a common ground through the via holes.
That is, the connections between the different layers are connected by vias. The through holes can be filled with electric connectors, and metal walls can be arranged in the through holes to serve as the electric connectors.
As shown in fig. 6, an embodiment of the present application further provides an electronic device 10, where the electronic device 10 may include: a middle shell assembly 11, a main circuit board 12, a bracket 13 and a circuit board 14 provided in any of the above embodiments. Of course, the electronic device may further include a battery, a display screen, a front case, a rear case, and the like, and the text is not described one by one in the present application in consideration of brevity.
Specifically, the main circuit board 12 is provided to the middle case assembly 11; the bracket 13 is arranged on one side of the main circuit board 12, which is far away from the middle shell assembly 11, and the bracket 13 is used for fixing the main circuit board 12 on the middle shell assembly 11; the circuit board 14 is arranged on one side of the bracket 13, which is far away from the main circuit board 12; wherein the middle shell assembly 11, the main circuit board 12 and the bracket 13 are grounded.
The middle shell component is used for connecting a front shell and a rear shell of the equipment and can be used as an installation foundation of the main circuit board, the main circuit board can be installed on the middle shell component, and the middle shell component can provide a protection effect for the main circuit board.
In the embodiment of the present application, by using the circuit board 14 provided in the above embodiment, the first slot disposed around the antenna isolates the antenna unit from the metal ground, and the second slot increases 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, have no great influence on the directional characteristic of the antenna, and ensure the measurement accuracy of UWB.
Optionally, 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.
That is, the area of the bracket 13 may be set larger than the area of the circuit board 14 to serve as an extension of the ground of the UWB antenna.
It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element. Further, it should be noted that the scope of the methods and apparatus of the embodiments of the present application is not limited to performing the functions in the order illustrated or discussed, but may include performing the functions in a substantially simultaneous manner or in a reverse order based on the functions involved, e.g., the methods described may be performed in an order different than that described, and various steps may be added, omitted, or combined. In addition, features described with reference to certain examples may be combined in other examples.
Through the above description of the embodiments, those skilled in the art will clearly understand that the method of the above embodiments can be implemented by software plus a necessary general hardware platform, and certainly can also be implemented by hardware, but in many cases, the former is a better implementation manner. Based on such understanding, the technical solutions of the present application may be embodied in the form of a software product, which is stored in a storage medium (such as ROM/RAM, magnetic disk, optical disk) and includes instructions for enabling a terminal (such as a mobile phone, a computer, a server, an air conditioner, or a network device) to execute the method according to the embodiments of the present application.
While the present embodiments have been described with reference to the accompanying drawings, it is to be understood that the invention is not limited to the precise embodiments described above, which are meant to be illustrative and not restrictive, and that various changes may be made therein by those skilled in the art without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (12)
1. 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, the metal ground is arranged between any two antenna units, a first feed contact point is arranged on each antenna unit, each antenna unit is isolated from the metal ground through a first groove, a second groove is formed in each antenna unit, and the first feed contact point is arranged in the non-center of the antenna unit;
the second substrate layer is provided with a metal ground, an insulating part for isolating the metal ground on the second substrate layer from each antenna unit on the first substrate layer, at least two second feeding contact points corresponding to the first feeding contact points, and at least two transmission lines, wherein the first end of each transmission line is connected with the corresponding second feeding contact point, and each second feeding contact point is connected with the corresponding first feeding contact point on the first substrate layer;
a metal ground and at least two contact points are arranged on the third substrate layer, each contact point is connected with the second end of the corresponding transmission line on the second substrate layer, and the at least two contact points are used for connecting a radio frequency unit;
wherein a metal ground of the first substrate layer, a metal ground of the second substrate layer, and a metal ground of the third substrate layer are co-grounded.
2. The circuit board of claim 1, wherein the second slot is in communication with the first slot.
3. The circuit board of claim 2, further comprising a third slot, wherein the third slot is an opening formed in the antenna unit, the second slot extends along a first direction, the third slot extends along a second direction, and an included angle is formed between the first direction and the second direction.
4. The circuit board of claim 3, wherein the first direction is a direction parallel to a current direction of the first operating frequency band of the antenna unit.
5. The circuit board of claim 4, wherein the third slot is a slot passing through the center of the antenna unit, and the second direction is at an angle of 45 ° to the first direction.
6. The circuit board of claim 3, wherein the third slot comprises two subslots, and wherein the two subslots intersect.
7. The circuit board of claim 6, wherein the second slot extends along a first direction, and the extending direction of the two sub slots forms an included angle with the first direction.
8. The circuit board of claim 7, wherein the first direction is a direction parallel to a current direction of the first operating frequency band of the antenna unit, an intersection of the two sub-slots coincides with a center of the antenna unit, and the two sub-slots are perpendicular to each other and both form an angle of 45 ° with the first direction.
9. The circuit board of claim 6, wherein the two subslots differ in length.
10. The circuit board of claim 1, wherein a portion of the second substrate layer facing the antenna elements on the first substrate layer is provided with a clearance area.
11. The circuit board of claim 1, wherein the at least two antenna elements comprise a first antenna element, a second antenna element, and a third antenna element, the first antenna element and the second antenna element are distributed along a first direction, the second antenna element and the third antenna element are distributed along a second direction, and the first direction is perpendicular to the second direction;
wherein the angle or distance in the first plane is measurable in the case that the first antenna and the second antenna are simultaneously operated; under the condition that the second antenna and the third antenna work simultaneously, the angle or the distance in the second plane can be measured; the first plane and the second plane are arranged perpendicular to each other.
12. An electronic device, comprising: a mid-shell assembly, a main circuit board, a bracket and a circuit board according to any one of claims 1-11;
the main circuit board is arranged on the middle shell assembly;
the bracket is arranged on one side of the main circuit board, which is far away from the middle shell assembly, and is used for fixing the main circuit board on the middle shell assembly;
the circuit board is arranged on one side of the support, which is far away from the main circuit board;
wherein the mid-shell assembly, the main circuit board and the bracket are commonly grounded.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110387347.6A CN113178697B (en) | 2021-04-09 | 2021-04-09 | Circuit board and electronic equipment |
| PCT/CN2022/085361 WO2022213995A1 (en) | 2021-04-09 | 2022-04-06 | Circuit board and electronic device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110387347.6A CN113178697B (en) | 2021-04-09 | 2021-04-09 | Circuit board and electronic equipment |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113178697A true CN113178697A (en) | 2021-07-27 |
| CN113178697B CN113178697B (en) | 2023-11-10 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110387347.6A Active CN113178697B (en) | 2021-04-09 | 2021-04-09 | Circuit board and electronic equipment |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN113178697B (en) |
| WO (1) | WO2022213995A1 (en) |
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| WO2022213995A1 (en) * | 2021-04-09 | 2022-10-13 | 维沃移动通信有限公司 | Circuit board and electronic device |
| WO2023186032A1 (en) * | 2022-04-01 | 2023-10-05 | 维沃移动通信有限公司 | Ultra-bandwidth antenna array and electronic device |
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| CN113178697B (en) * | 2021-04-09 | 2023-11-10 | 维沃移动通信有限公司 | Circuit board and electronic equipment |
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Also Published As
| Publication number | Publication date |
|---|---|
| CN113178697B (en) | 2023-11-10 |
| WO2022213995A1 (en) | 2022-10-13 |
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