CN112421208A - Electronic equipment and antenna device - Google Patents
Electronic equipment and antenna device Download PDFInfo
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- CN112421208A CN112421208A CN202011240647.3A CN202011240647A CN112421208A CN 112421208 A CN112421208 A CN 112421208A CN 202011240647 A CN202011240647 A CN 202011240647A CN 112421208 A CN112421208 A CN 112421208A
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- antenna
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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
- H01Q1/12—Supports; Mounting means
- H01Q1/22—Supports; Mounting means by structural association with other equipment or articles
- H01Q1/2291—Supports; Mounting means by structural association with other equipment or articles used in bluetooth or WI-FI devices of Wireless Local Area Networks [WLAN]
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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
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/52—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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Abstract
The invention discloses electronic equipment and an antenna device, which can ensure that the three antennas printed on a PCB (printed Circuit Board) keep higher isolation between every two antennas. The method comprises the following steps: a PCB body; the first antenna, the second antenna and the third antenna are printed on the PCB body, and the feeding directions of the first antenna and the second antenna are the same and are vertical to the feeding direction of the third antenna; a first blocking slot located between the first antenna and the second antenna, the first blocking slot being configured to increase isolation between the first antenna and the second antenna; the third antenna forms two ground branches through a second separation gap, and the second separation gap is used for increasing the isolation among the first antenna, the second antenna and the third antenna; at least one frequency of the first antenna, the second antenna and the third antenna is the same, the length of the PCB body is smaller than one N of the wavelength of the antenna corresponding to the at least one frequency, and N is an integer larger than 1.
Description
Technical Field
The present invention relates to Printed Circuit Board (PCB) antenna technology, and more particularly, to an electronic device and an antenna apparatus.
Background
The design space of the antenna is smaller and smaller due to the increasingly smaller module and the lower cost, and particularly, on a small PCB (Printed Circuit Board), the distance between the antennas is closer and closer, and the isolation is worse and worse, thereby affecting the wireless transmission performance such as the antenna performance and the data transmission rate. The PCB printed antenna has the advantages of low manufacturing cost, small occupied space and the like, but the printed antenna is positioned on the same plane, and particularly when the size of the PCB is smaller than the half wavelength of the printed antenna, the mutual coupling between the antennas is very strong, and the isolation degree is very poor. Two same-frequency printed antennas can increase the isolation between two antennas by means of a gap and a middle line, but the isolation between every two antennas is deteriorated when a third printed antenna appears.
Disclosure of Invention
The invention provides electronic equipment and an antenna device, which can be applied to a small PCB (printed Circuit Board), can ensure that the three antennas printed on the PCB keep higher isolation between every two antennas, and has the service efficiency of more than 50%.
In a first aspect, the present invention provides an electronic device comprising:
a PCB body;
the first antenna, the second antenna and the third antenna are printed on the PCB body, and the feeding directions of the first antenna and the second antenna are the same and are vertical to the feeding direction of the third antenna;
a first blocking slot located between the first antenna and the second antenna, the first blocking slot being configured to increase isolation between the first antenna and the second antenna; the third antenna forms two ground branches through a second separation gap, and the second separation gap is used for increasing the isolation among the first antenna, the second antenna and the third antenna;
at least one frequency of the first antenna, the second antenna and the third antenna is the same, the length of the PCB body is smaller than one N of the wavelength of the antenna corresponding to the at least one frequency, and N is an integer larger than 1.
The antenna device provided by the embodiment can ensure that the three antennas keep high isolation degree between every two antennas, and has the service efficiency of more than 50%.
In a possible implementation manner, the first antenna and the second antenna are dual-frequency WIFI antennas, and the third antenna is a bluetooth antenna.
In a possible implementation manner, the first antenna, the second antenna, and the third antenna are located on the same PCB board plane.
In one possible implementation, the first antenna and the second antenna are symmetrical with respect to the first blocking slot.
In a possible implementation manner, the length of the first blocking slot is not less than M times of the antenna wavelength corresponding to the at least one frequency, where M is an integer not less than N; and/or the presence of a gas in the gas,
the length of the second blocking gap is not less than one M of the wavelength of the antenna corresponding to the at least one frequency, and M is an integer not less than N.
In a second aspect, the present invention provides an antenna arrangement, the arrangement comprising:
a PCB body;
a ground metal layer printed on the PCB body, wherein the ground metal layer is formed with a first clearance area, a second clearance area and a third clearance area, and the ground metal layer is formed with a first blocking gap, and the first blocking gap is positioned between the first clearance area and the second clearance area;
the first feed body is formed in the first clearance area, and the first feed body and the grounding metal layer are matched to form a first antenna;
a second feeder formed in the second clearance area, the second feeder and the ground metal layer cooperating to form a second antenna;
a third feeder formed in the third clearance area, wherein the ground metal layer forms two ground branches at the third clearance area through a second blocking gap, and the third feeder, the two ground branches and the second blocking gap cooperate to form a third antenna;
the feeding directions of the first antenna and the second antenna are the same and are perpendicular to the feeding direction of the third antenna.
The antenna device provided by the embodiment can ensure that the three antennas keep high isolation degree between every two antennas, and has the service efficiency of more than 50%.
In one possible implementation manner, the first and second clearance areas are arranged along a first direction, the third clearance area and the first clearance area are arranged along a second direction, and the first direction is perpendicular to the second direction; the feeding directions of the first antenna and the second antenna are along a second direction; the feeding direction of the third antenna is along a first direction;
the first blocking clearance comprises a blocking clearance area between the first clearance area and the second clearance area and a first clearance gap which is positioned on one side of the blocking clearance area facing the third clearance area and is connected with the blocking clearance area;
the second separation gap includes second headroom gap, follows the third headroom gap that the first direction extends and the fourth headroom gap that extends along the second direction, the second headroom gap is located first headroom zone one side is kept away from in order to incite somebody to action to the third headroom zone with the ground metal between the PCB plate body edge separates, the one end of third headroom gap with the third headroom zone is connected, and the other end is connected with the fourth headroom gap, the fourth headroom gap is located the third headroom gap orientation one side of first headroom zone.
In one possible implementation manner, the method further includes:
a first feeding port formed at the first feeder, the first feeding port being located at a side of the first feeder toward the third feeder;
a second feeding port formed in the second feeder, the second feeding port being located on a side of the second feeder facing the third feeder;
a third feeding port formed at the third feeder, the third feeding port being located at a side of the third feeder facing the fourth clearance gap.
In one possible implementation, the first clearance gap includes a first half clearance gap extending along the second direction and a second half clearance gap connected with the first half clearance gap and distributed along the first direction; the one end of first half headroom gap with the separation headroom district is connected, the other end of first half headroom gap with the middle part of second half headroom gap is connected.
In a possible implementation manner, the third antenna is located in a distance range from a left preset value to a right preset value of the center of the PCB body.
In one possible implementation, the first antenna and the second antenna are symmetrical with respect to the first blocking slot.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without inventive exercise.
Fig. 1 is a schematic diagram of an electronic device according to an embodiment of the present invention;
fig. 2 is a schematic diagram of an antenna apparatus according to an embodiment of the present invention;
fig. 3 is a schematic diagram of a high isolation antenna apparatus according to an embodiment of the present invention;
fig. 4 is a schematic diagram of a feed port of each antenna according to an embodiment of the present invention;
fig. 5 is a schematic diagram of a first clearance gap according to an embodiment of the present invention;
FIG. 6 is a schematic diagram of a first testing apparatus according to an embodiment of the present invention;
fig. 7 is a schematic surface current diagram of a first antenna according to an embodiment of the present invention;
fig. 8 is a schematic surface current diagram of a second antenna according to an embodiment of the present invention;
fig. 9 is a schematic diagram of isolation between a first antenna and a second antenna according to an embodiment of the present invention;
FIG. 10 is a schematic diagram of a second testing apparatus according to an embodiment of the present invention;
fig. 11 is a schematic surface current diagram of a first antenna according to an embodiment of the present invention;
fig. 12 is a schematic surface current diagram of a second antenna according to an embodiment of the present invention;
fig. 13 is a schematic diagram of isolation between a first antenna and a second antenna according to an embodiment of the present invention;
fig. 14 is a schematic diagram illustrating the isolation between the first antenna and the second antenna according to the embodiment of the present invention;
FIG. 15 is a schematic view of a third testing apparatus according to an embodiment of the present invention;
fig. 16 is a schematic surface current diagram of a third antenna according to an embodiment of the present invention;
fig. 17 is a schematic diagram of isolation between three antennas according to an embodiment of the present invention;
fig. 18 is a schematic diagram of a high isolation antenna apparatus according to an embodiment of the present invention;
fig. 19 is a schematic surface current diagram of a third antenna according to an embodiment of the present invention;
fig. 20 is a schematic resonance diagram of a third antenna according to the embodiment of the present invention;
fig. 21 is a schematic diagram of isolation between two of the three antennas according to the embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention clearer, the present invention will be described in further detail with reference to the accompanying drawings, and it is apparent that the described embodiments are only a part of the embodiments of the present invention, 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 application scenario described in the embodiment of the present invention is for more clearly illustrating the technical solution of the embodiment of the present invention, and does not form a limitation on the technical solution provided in the embodiment of the present invention, and it can be known by a person skilled in the art that with the occurrence of a new application scenario, the technical solution provided in the embodiment of the present invention is also applicable to similar technical problems. In the description of the present invention, the term "plurality" means two or more unless otherwise specified.
The design space of the antenna is smaller and smaller due to the increasingly smaller module and the lower cost, and particularly, on a small PCB (Printed Circuit Board), the distance between the antennas is closer and closer, and the isolation is worse and worse, thereby affecting the wireless transmission performance such as the antenna performance and the data transmission rate. The PCB printed antenna has the advantages of low manufacturing cost, small occupied space and the like, but the printed antenna is positioned on the same plane, and particularly when the size of the PCB is smaller than the half wavelength of the printed antenna, the mutual coupling between the antennas is very strong, and the isolation degree is very poor. Two same-frequency printed antennas can increase the isolation between two antennas by means of a gap and a middle line, but the isolation between every two antennas is deteriorated when a third printed antenna appears.
As shown in fig. 1, an electronic device provided in an embodiment of the present invention includes:
a PCB body 100;
the antenna comprises a first antenna 101, a second antenna 102 and a third antenna 103 which are printed on the PCB body, wherein the feeding directions of the first antenna and the second antenna are the same and are vertical to the feeding direction of the third antenna;
a first blocking slot 104 between the first antenna and the second antenna, the first blocking slot being configured to increase isolation between the first antenna and the second antenna; the third antenna forms two ground branches through a second isolation gap 105, and the second isolation gap is used for increasing the isolation among the first antenna, the second antenna and the third antenna;
at least one frequency of the first antenna, the second antenna and the third antenna is the same, the length of the PCB body is smaller than one N of the wavelength of the antenna corresponding to the at least one frequency, and N is an integer larger than 1. Wherein said N may be 2.
As an optional implementation manner, the first antenna and the second antenna are dual-frequency WIFI antennas, and the third antenna is a bluetooth antenna.
As an optional implementation manner, the first antenna, the second antenna, and the third antenna are located on the same PCB board plane.
As an alternative embodiment, the first antenna and the second antenna are symmetrical with respect to the first blocking slot.
As an optional implementation manner, the length of the first blocking slot is not less than M times of the antenna wavelength corresponding to the at least one frequency, where M is an integer not less than N; wherein M may be 4; and/or the presence of a gas in the gas,
the length of the second blocking slot is not less than M times of the wavelength of the antenna corresponding to the at least one frequency, where M is an integer not less than N, where M may be 4.
As shown in fig. 2, the apparatus includes:
a PCB body 200;
a ground metal layer 201 printed on the PCB board, the ground metal layer being formed with a first clearance area 2010, a second clearance area 2011 and a third clearance area 2012, and the ground metal layer being formed with a first blocking gap 2013, the first blocking gap being located between the first clearance area and the second clearance area;
a first feed 202 formed in the first clearance area, the first feed cooperating with the ground metal layer to form a first antenna;
a second feeder 203 formed in the second clearance area, wherein the second feeder and the ground metal layer cooperate to form a second antenna;
a third feed 204 formed in the third clearance area, where the ground metal layer forms two ground branches through the second blocking slot 2014, and the third feed cooperates with the two ground branches and the second blocking slot to form a third antenna;
the feeding directions of the first antenna and the second antenna are the same and are perpendicular to the feeding direction of the third antenna.
As an alternative embodiment, the first and second clearance areas are arranged along a first direction, the third clearance area is arranged along a second direction with the first clearance area, and the first direction is perpendicular to the second direction; the feeding directions of the first antenna and the second antenna are along a second direction; the feeding direction of the third antenna is along a first direction;
the first blocking clearance comprises a blocking clearance area between the first clearance area and the second clearance area and a first clearance gap which is positioned on one side of the blocking clearance area facing the third clearance area and is connected with the blocking clearance area;
the second separation gap includes second headroom gap, follows the third headroom gap that the first direction extends and the fourth headroom gap that extends along the second direction, the second headroom gap is located first headroom zone one side is kept away from in order to incite somebody to action to the third headroom zone with the ground metal between the PCB plate body edge separates, the one end of third headroom gap with the third headroom zone is connected, and the other end is connected with the fourth headroom gap, the fourth headroom gap is located the third headroom gap orientation one side of first headroom zone.
As shown in fig. 3, an embodiment of the present invention provides a high-isolation antenna apparatus, including:
a PCB body 300;
a ground metal layer 301 printed on the PCB board, the ground metal layer being formed with a first clearance area 3010, a second clearance area 3011 and a third clearance area 3012, wherein the first clearance area and the second clearance area are arranged along a first direction, the third clearance area and the first clearance area are arranged along a second direction, and the first direction is perpendicular to the second direction; and the ground metal layer is formed with a first blocking gap 3013, the first blocking gap includes a blocking clearance area 30130 located between the first clearance area and the second clearance area, and a first clearance gap 30131 located on one side of the blocking clearance area facing the third clearance area and connected with the blocking clearance area;
a first feeder 302 formed in the first clearance area, the first feeder and the ground metal layer cooperating to form a first antenna, a feeding direction of the first antenna being along a second direction;
a second feeder 303 formed in the second clearance area, where the second feeder cooperates with the ground metal layer to form a second antenna, and a feeding direction of the second antenna is along a second direction;
a third feeder 304 formed in the third clearance area, where the ground metal layer forms two ground branches through a second blocking slit 3014, and the third feeder forms a third antenna in cooperation with the two ground branches and the second blocking slit; the second separation gap includes second headroom gap 30140, the third headroom gap 30141 that extends along the first direction and the fourth headroom gap 30142 that extends along the second direction, the second headroom gap is located first headroom district one side is kept away from to the third headroom in order to separate the ground metal between third headroom and the PCB plate body edge, the one end of third headroom gap with the third headroom is distinguished and is connected, and the other end is connected with the fourth headroom gap, the fourth headroom gap is located the third headroom gap orientation one side of first headroom, the feed direction of third antenna is along first direction.
As an alternative embodiment, the first antenna and the second antenna are symmetrical with respect to the first blocking slot.
As an optional implementation, the method further includes:
as shown in fig. 4, a first feeding port 4000 formed in the first feeding body 400, the first feeding port being located at a side of the first feeding body facing the third feeding body;
a second feeding port 4011 formed in the second feeder 401, the second feeding port being located on a side of the second feeder facing the third feeder;
a third feeding port 4022 formed in the third feeding body 402, and the third feeding port is located on a side of the third feeding body facing the fourth clearance gap.
As an alternative embodiment, as shown in fig. 5, the first clearance gap 500 includes a first clearance gap 5000 extending along the second direction and a second clearance gap 5001 connected to the first clearance gap and distributed along the first direction; the one end of first half headroom gap with the separation headroom district is connected, the other end of first half headroom gap with the middle part of second half headroom gap is connected.
As an optional implementation manner, at least one frequency of the first antenna, the second antenna and the third antenna is the same;
the sum of the lengths of the first half-clearance gap and the second half-clearance gap is not less than one quarter of the antenna wavelength corresponding to the at least one frequency.
As an optional implementation manner, at least one frequency of the first antenna, the second antenna and the third antenna is the same;
the sum of the lengths of the third clearance gap and the fourth clearance gap is not less than one quarter of the antenna wavelength corresponding to the at least one frequency.
As an optional implementation manner, at least one frequency of the first antenna, the second antenna and the third antenna is the same;
the length of the PCB body is less than one half of the wavelength of the antenna corresponding to the at least one frequency, and the width of the PCB body is less than one quarter of the wavelength of the antenna corresponding to the at least one frequency; or the like, or, alternatively,
the width of the PCB body is smaller than one half of the wavelength of the antenna corresponding to the at least one frequency, and the length of the PCB body is smaller than one quarter of the wavelength of the antenna corresponding to the at least one frequency.
As an alternative embodiment, the third antenna is located within a distance range of 10% to 10% from the left to the right with respect to the center of the PCB board body.
As an optional implementation manner, the first antenna, the second antenna, and the third antenna are located on the same PCB board plane.
As an optional implementation manner, the first antenna and the second antenna are dual-frequency WIFI antennas, and the third antenna is a bluetooth antenna.
As an alternative embodiment, the first antenna operates at 2.4GHz and 5 GHz; the second antenna works at 2.4GHz and 5 GHz; the third antenna works at 2.4GHz-2.5 GHz. The dimensions of the PCB plate are 55mm 33mm 0.8mm, wherein the length 55mm of the PCB plate is less than the half wavelength of 2.4GHz, and the width 33mm is less than the quarter wavelength of 2.4 GHz. The high-isolation antenna provided by the invention has good isolation degree through testing, and the specific testing process comprises the following steps:
as shown in fig. 6, specifically, the test apparatus 600 includes:
a PCB body 601;
a ground metal layer 602 printed on the PCB board, the ground metal layer having a first clearance area 603 and a second clearance area 604, the first clearance area and the second clearance area being arranged along a first direction;
a first feeding body 6033 formed in the first clearance area, the first feeding body and the ground metal layer cooperate to form a first antenna, a feeding direction of the first antenna is along a second direction, and the first direction is perpendicular to the second direction;
and a second feeding body 6044 formed in the second clearance area, the second feeding body and the ground metal layer cooperate to form a second antenna, and a feeding direction of the second antenna is along a second direction.
The surface current (first antenna port excitation) of the first antenna measured using the test apparatus 600 described above is shown in fig. 7, the surface current (second antenna port excitation) of the second antenna measured is shown in fig. 8, the isolation S21 between the first antenna and the second antenna is shown in fig. 9, and the isolation between the first antenna and the second antenna is about-7 dB at 2.4GHz to 2.5 GHz; in fig. 9, the abscissa represents frequency in GHz, and the ordinate represents isolation.
And 2, printing the first antenna, the second antenna and a first blocking gap between the first antenna and the second antenna on the PCB body.
As shown in fig. 10, specifically, the test apparatus 1000 includes:
a PCB board body 1001;
a ground metal layer 1002 printed on the PCB board, wherein the ground metal layer is formed with a first clearance area 1003, a second clearance area 1004, and the ground metal layer is formed with a first blocking slit 1005, and the first blocking slit includes a blocking clearance area located between the first clearance area and the second clearance area, and a first clearance slit located on a side of the blocking clearance area away from the first clearance area and connected to the blocking clearance area; the first and second clearance areas are arranged along a first direction;
a first feeding body 10033 formed in the first clearance area, the first feeding body and the ground metal layer cooperating to form a first antenna, a feeding direction of the first antenna is along a second direction, and the first direction is perpendicular to the second direction;
a second feeding body 10044 formed in the second clearance area, the second feeding body and the ground metal layer cooperate to form a second antenna, and a feeding direction of the second antenna is along a second direction.
The surface current (first antenna port excitation) of the first antenna measured using the test apparatus 1000 described above is shown in fig. 11, the surface current (second antenna port excitation) of the second antenna measured is shown in fig. 12, the isolation S21 between the first antenna and the second antenna is shown in fig. 13, and the isolation between the first antenna and the second antenna is about-19 dB at 2.4GHz to 2.5 GHz; in fig. 13, the abscissa represents frequency in GHz, and the ordinate represents isolation. Fig. 14 is a comparison diagram of the isolation between the first antenna and the second antenna in fig. 9 and 13, where S21 before the slot is a solid line, indicating the isolation between the first antenna and the second antenna before the slot without the first blocking slot, S21, and S21 after the slot is a dashed line, indicating the isolation between the first antenna and the second antenna after the slot with the first blocking slot, S21. It can be seen that the isolation of the first antenna after slotting compared to the isolation of the second antenna at 2.4GHz to 2.5GHz improves by 12dB from the S21 isolation before slotting.
specifically, as shown in fig. 15, the test apparatus 1500 includes:
a PCB board body 1501;
a ground metal layer 1502 printed on the PCB body, the ground metal layer being formed with a first clearance region 1503, a second clearance region 1504, and a third clearance region 1505, wherein the first clearance region and the second clearance region are arranged along a first direction, the third clearance region and the second clearance region are arranged along a second direction, the first direction and the second direction being perpendicular; the grounding metal layer is formed with a first blocking gap 1506, and the first blocking gap comprises a blocking clearance area between the first clearance area and the second clearance area and a first clearance gap which is located on one side of the blocking clearance area far away from the first clearance area and is connected with the blocking clearance area;
a first feeding body 15033 formed in the first clearance area, the first feeding body and the ground metal layer cooperating to form a first antenna, a feeding direction of the first antenna being along a second direction;
a second feeding body 15044 formed in the second clearance area, the second feeding body and the ground metal layer cooperating to form a second antenna, a feeding direction of the second antenna being along a second direction;
and a third feeding body 15055 formed in the third clearance area, wherein the third feeding body cooperates with the ground metal layer to form a third antenna, and a feeding direction of the third antenna is along a second direction.
The surface current (third antenna port excitation) of the third antenna measured by using the test apparatus 1500 is shown in fig. 16, and the isolation between the three antennas is shown in fig. 17, where S21 represents the isolation between the second antenna and the first antenna; s31 represents the isolation between the third antenna and the first antenna; s32 represents the isolation between the third antenna and the second antenna; where the abscissa in fig. 17 represents frequency in GHz and the ordinate represents isolation. As can be seen from fig. 17, after the third antenna is added, the isolation S21 between the first antenna and the second antenna is worse than before the third antenna is not added (e.g., after the slot S21 in fig. 12).
specifically, in the embodiment of the present invention, first, feeding is performed in a direction perpendicular to the feeding direction of the WIFI antennas (the first antenna and the second antenna), as shown in fig. 18, the feeding direction of the port 1 of the first antenna 1801 and the port 2 of the second antenna 1802 is a vertical direction, the direction of the port 3 of the third antenna 1803 is a horizontal direction, and the position is approximately located at the center of the PCB board and is 10% wider than the left or right board. The third antenna consists of a feed, two ground branches and an L-shaped clearance gap. As shown in fig. 18, the region where the dot is located is the feeding body, the feeding body forms 2.4GHz-2.5GHz resonance with the right ground branch, and the right ground branch is coupled with the left ground branch to form a current opposite to that of the left ground branch, so that the bandwidth of the third antenna is narrowed, the resonance is shallow, and the coupling between the antennas is reduced. The surface current (third antenna port excitation) of the third antenna measured using the antenna device of the embodiment of the present invention is shown in fig. 19; fig. 20 is a schematic resonance diagram of the third antenna, wherein the resonance becomes shallower compared with the third antenna in fig. 15, where the resonance diagram of the third antenna in fig. 15 is shown before S33 in fig. 20, and the resonance diagram of the third antenna in the embodiment of the present invention is shown after S33, where the horizontal axis coordinate represents frequency, the unit is GHz, and the vertical axis represents resonance. The isolation between the three antennas is shown in fig. 21, where S21 in fig. 21 represents the isolation between the first antenna and the second antenna in the present embodiment, S31 represents the isolation between the first antenna and the third antenna in the present embodiment, and S32 represents the isolation between the third antenna and the second antenna in the present embodiment, it can be seen that the isolation between the three antennas is all above-15 dB at 2.4GHz-2.5GHz, and the isolation effect between the three antennas is significant.
As will be appreciated by one skilled in the art, embodiments of the present invention may be provided as a method, system, or computer program product. Accordingly, the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present invention may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, optical storage, and the like) having computer-usable program code embodied therein.
The present invention is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the invention. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.
Claims (10)
1. An electronic device, comprising:
a PCB body;
the first antenna, the second antenna and the third antenna are printed on the PCB body, and the feeding directions of the first antenna and the second antenna are the same and are vertical to the feeding direction of the third antenna;
a first blocking slot located between the first antenna and the second antenna, the first blocking slot being configured to increase isolation between the first antenna and the second antenna; the third antenna forms two ground branches through a second separation gap, and the second separation gap is used for increasing the isolation among the first antenna, the second antenna and the third antenna;
at least one frequency of the first antenna, the second antenna and the third antenna is the same, the length of the PCB body is smaller than one N of the wavelength of the antenna corresponding to the at least one frequency, and N is an integer larger than 1.
2. The device of claim 1, wherein the first and second antennas are dual-band WIFI antennas and the third antenna is a Bluetooth antenna.
3. The apparatus of claim 1,
the first antenna, the second antenna and the third antenna are positioned on the same PCB plane.
4. The apparatus of claim 1,
the first antenna and the second antenna are symmetrical relative to the first blocking slot.
5. The apparatus according to claim 1, wherein the length of the first blocking slot is not less than M times of the antenna wavelength corresponding to the at least one frequency, where M is an integer not less than N; and/or the presence of a gas in the gas,
the length of the second blocking gap is not less than one M of the wavelength of the antenna corresponding to the at least one frequency, and M is an integer not less than N.
6. An antenna device, comprising:
a PCB body;
a ground metal layer printed on the PCB body, wherein the ground metal layer is formed with a first clearance area, a second clearance area and a third clearance area, and the ground metal layer is formed with a first blocking gap, and the first blocking gap is positioned between the first clearance area and the second clearance area;
the first feed body is formed in the first clearance area, and the first feed body and the grounding metal layer are matched to form a first antenna;
a second feeder formed in the second clearance area, the second feeder and the ground metal layer cooperating to form a second antenna;
a third feeder formed in the third clearance area, wherein the ground metal layer forms two ground branches at the third clearance area through a second blocking gap, and the third feeder, the two ground branches and the second blocking gap cooperate to form a third antenna;
the feeding directions of the first antenna and the second antenna are the same and are perpendicular to the feeding direction of the third antenna.
7. The apparatus of claim 6,
the first clearance area and the second clearance area are arranged along a first direction, the third clearance area and the first clearance area are arranged along a second direction, and the first direction is vertical to the second direction; the feeding directions of the first antenna and the second antenna are along a second direction; the feeding direction of the third antenna is along a first direction;
the first blocking clearance comprises a blocking clearance area between the first clearance area and the second clearance area and a first clearance gap which is positioned on one side of the blocking clearance area facing the third clearance area and is connected with the blocking clearance area;
the second separation gap includes second headroom gap, follows the third headroom gap that the first direction extends and the fourth headroom gap that extends along the second direction, the second headroom gap is located first headroom zone one side is kept away from in order to incite somebody to action to the third headroom zone with the ground metal between the PCB plate body edge separates, the one end of third headroom gap with the third headroom zone is connected, and the other end is connected with the fourth headroom gap, the fourth headroom gap is located the third headroom gap orientation one side of first headroom zone.
8. The apparatus of claim 6, further comprising:
a first feeding port formed at the first feeder, the first feeding port being located at a side of the first feeder toward the third feeder;
a second feeding port formed in the second feeder, the second feeding port being located on a side of the second feeder facing the third feeder;
a third feeding port formed at the third feeder, the third feeding port being located at a side of the third feeder facing the fourth clearance gap.
9. The apparatus of claim 7,
the first clearance gap comprises a first half clearance gap extending along the second direction and a second half clearance gap connected with the first half clearance gap and distributed along the first direction; the one end of first half headroom gap with the separation headroom district is connected, the other end of first half headroom gap with the middle part of second half headroom gap is connected.
10. The apparatus of claim 6,
the third antenna is located in the distance range from the left preset value to the right preset value of the center of the PCB body.
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