Antenna unit and electronic equipment thereof

Abstract

The embodiment of the utility model provides an antenna unit and electronic equipment thereof. The antenna unit comprises a substrate and a metal layer, and the substrate has a first edge extending along a first direction; the metal layer is located on one side of the substrate, the metal layer comprises a ground signal line, a Bluetooth antenna, a first WIFI antenna and a second WIFI antenna, the Bluetooth antenna, the first WIFI antenna and the second WIFI antenna are arranged at the positions close to the first edge at intervals in the first direction, the metal layer further comprises an isolation branch knot, the isolation branch knot is connected with the ground signal line, and the isolation branch knot is connected with the ground signal line. The isolation branch knot is located between the Bluetooth antenna and the first WIFI antenna; and / or the isolation branch knot is located between the Bluetooth antenna and the second WIFI antenna. According to the technical scheme, the isolation degree of the Bluetooth antenna and the WIFI antenna can be improved on the premise that the performance of the Bluetooth antenna is not reduced.

Description

Technical Field

[0001] The present disclosure relates to the technical field of antenna devices, and in particular to an antenna unit and electronic equipment thereof. Background Art

[0002] With the rapid development of communication modules, in order to achieve both Bluetooth communication function and WIFI communication function, Bluetooth antenna and WIFI antenna are usually integrated on a circuit board (PCB board). However, due to the limited size of the PCB board, signal interference is easily generated between the Bluetooth antenna and the WIFI antenna, affecting normal communication. Utility Model Content

[0003] The embodiments of the present disclosure provide an antenna unit and an electronic device thereof to solve or alleviate one or more technical problems in the prior art.

[0004] As a first aspect of an embodiment of the present disclosure, an embodiment of the present disclosure provides an antenna unit, including:

[0005] a substrate having a first edge extending along a first direction;

[0006] A metal layer is located on one side of the substrate, the metal layer includes a ground signal line, a Bluetooth antenna, a first WIFI antenna and a second WIFI antenna, the Bluetooth antenna, the first WIFI antenna and the second WIFI antenna are arranged spaced apart from each other along a first direction at a position close to the first edge;

[0007] Wherein, the metal layer further includes an isolation branch, the isolation branch is connected to the ground signal line, and the isolation branch is located between the Bluetooth antenna and the first WIFI antenna; and / or, the isolation branch is located between the Bluetooth antenna and the second WIFI antenna.

[0008] In some possible implementations, the Bluetooth antenna and the first WIFI antenna have the same operating frequency band; and / or the Bluetooth antenna and the second WIFI antenna have the same operating frequency band.

[0009] In some possible implementations,

[0010] The Bluetooth antenna is located between the first WIFI antenna and the second WIFI antenna;

[0011] The isolation branch includes a first isolation branch located between the Bluetooth antenna and the first WIFI antenna; and / or the isolation branch includes a second isolation branch located between the Bluetooth antenna and the second WIFI antenna.

[0012] In some possible implementations, the first isolation branch includes a first sub-branch and a second sub-branch, the first sub-branch extends from an end close to the Bluetooth antenna toward the first WIFI antenna and gradually approaches the first edge, the second sub-branch extends from an end of the first sub-branch away from the Bluetooth antenna along the first direction and gradually away from the Bluetooth antenna, and the length of the first sub-branch is greater than the length of the second sub-branch.

[0013] In some possible implementations,

[0014] The distance between the end of the first sub-branch close to the Bluetooth antenna and the Bluetooth antenna is 7.7 mm to 8.7 mm; and / or,

[0015] The sum of the lengths of the first sub-branch and the second sub-branch is 21.5 mm to 22.5 mm.

[0016] In some possible implementations, the second isolation branch includes a third sub-branch, a fourth sub-branch and a fifth sub-branch, the third sub-branch extends from an end close to the Bluetooth antenna along the second direction and gradually approaches the first edge, the fourth sub-branch extends from an end of the third sub-branch close to the first edge along the first direction and gradually away from the Bluetooth antenna, the fifth sub-branch extends from an end of the fourth sub-branch away from the Bluetooth antenna along the second direction and gradually away from the first edge, the length of the third sub-branch and the length of the fourth sub-branch are both greater than the length of the fifth sub-branch, and the second direction is perpendicular to the first direction.

[0017] In some possible implementations, the distance between one end of the third sub-branch close to the Bluetooth antenna and the Bluetooth antenna is 3.3 mm-4.3 mm; and / or,

[0018] The sum of the lengths of the third sub-branch, the fourth sub-branch and the fifth sub-branch is 26.9 mm-27.9 mm.

[0019] In some possible implementations, the Bluetooth antenna, the first WIFI antenna, and the second WIFI antenna are arranged in sequence along a first direction, the isolation branch includes a third isolation branch located between the Bluetooth antenna and the first WIFI antenna, the third isolation branch includes a sixth sub-branch, a seventh sub-branch, and an eighth sub-branch, the sixth sub-branch extends from an end close to the Bluetooth antenna along the first direction and gradually away from the Bluetooth antenna, the seventh sub-branch extends from an end of the sixth sub-branch away from the Bluetooth antenna along the second direction and gradually away from the first edge, the eighth sub-branch extends from an end of the seventh sub-branch away from the first edge along the first direction and gradually approaches the Bluetooth antenna, the second direction is perpendicular to the first direction, and the lengths of the sixth sub-branch, the seventh sub-branch, and the eighth sub-branch decrease in sequence.

[0020] In some possible implementations,

[0021] The distance between the end of the sixth sub-branch close to the Bluetooth antenna and the Bluetooth antenna is 4.5 mm-5.5 mm; and / or,

[0022] The distance between the end of the eighth sub-branch close to the first WIFI antenna and the first WIFI antenna is 9.3 mm-10.3 mm; and / or,

[0023] The sum of the lengths of the sixth sub-branch, the seventh sub-branch and the eighth sub-branch is 17mm-18mm.

[0024] As a second aspect of an embodiment of the present disclosure, an embodiment of the present disclosure provides an electronic device, comprising the antenna unit described in any embodiment of the present disclosure.

[0025] The technical solution of the embodiment of the present disclosure can achieve the following beneficial effects: the antenna unit of the embodiment of the present disclosure can improve the isolation between the Bluetooth antenna and the WIFI antenna without reducing the performance of the Bluetooth antenna.

[0026] The above summary is for illustrative purposes only and is not intended to be limiting in any way. In addition to the illustrative aspects, embodiments and features described above, further aspects, embodiments and features of the present disclosure will be readily apparent by reference to the accompanying drawings and the following detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In the accompanying drawings, unless otherwise specified, the same reference numerals throughout the multiple drawings represent the same or similar parts or elements. These drawings are not necessarily drawn to scale. It should be understood that these drawings only depict some embodiments according to the present disclosure and should not be regarded as limiting the scope of the present disclosure.

[0028] Figure 1 is a schematic diagram of a planar structure of an antenna unit according to an embodiment of the present disclosure;

[0029] Figure 2 is a schematic diagram of a planar structure of an antenna unit according to another embodiment of the present disclosure;

[0030] Figure 3 This is a schematic diagram of the isolation test results of the Bluetooth antenna and the first WIFI antenna according to an embodiment of the present disclosure;

[0031] Figure 4 This is a schematic diagram of the isolation test results of the Bluetooth antenna and the second WIFI antenna according to an embodiment of the present disclosure;

[0032] Figure 5 It is a schematic diagram of the isolation test results of the Bluetooth antenna and the first WIFI antenna according to an embodiment of the present disclosure.

[0033] Description of reference numerals:

[0034] 10. substrate; 20. ground signal line; 30. Bluetooth antenna; 40. first WIFI antenna; 50. second WIFI antenna; 60. isolation branch; 10a. first edge; 61. first isolation branch; 62. second isolation branch; 63. third isolation branch; 611. first sub-branch; 612. second sub-branch; 621. third sub-branch; 622. fourth sub-branch; 623. fifth sub-branch; 631. sixth sub-branch; 632. seventh sub-branch; 633. eighth sub-branch. DETAILED DESCRIPTION

[0035] In the following, only some exemplary embodiments are briefly described. As those skilled in the art will appreciate, the described embodiments may be modified in various ways without departing from the spirit or scope of the present disclosure. Therefore, the drawings and descriptions are considered to be exemplary and non-restrictive in nature.

[0036] WIFI5 technology, also known as IEEE 802.11ac, brings faster speeds, larger capacity and more reliable connections, profoundly changing the landscape of wireless communications. The WIFI5 communication module integrates the WIFI antenna and Bluetooth antenna, and adopts a dual WIFI antenna design, which can greatly improve the data transmission speed, and can communicate with multiple devices at the same time, thereby maintaining a high speed and stability when the network load is large, avoiding network congestion. The WIFI5 communication module can not only meet the needs of data collection, data transmission and data upload, but also meet the intelligent needs of the product to connect to the cloud platform, and can also realize multiple control modes such as home control and remote control. It is a highly recommended communication module for IoT smart home applications.

[0037] However, due to the electromagnetic coupling between the circuits, electromagnetic coupling refers to the mutual inductance between the two circuits, and the current change of one circuit affects the other circuit through mutual inductance. In the process of wireless WIFI coverage, when the Bluetooth antenna and the WIFI antenna with close distance work at the same time, the Bluetooth antenna and the WIFI antenna will affect each other due to the mutual inductance phenomenon, and generate electromagnetic interference to each other, resulting in co-frequency interference of the antenna. When the co-frequency interference causes the two antennas to work at the same frequency, the simultaneous transmission and reception of data by the antenna will cause interference and delay. For example, the low frequency band of the WIFI antenna and the Bluetooth antenna work in the same frequency band, such as the 2412MHz-2482MHz frequency band. In this way, in actual use scenarios, the interference between the 2.4G WIFI antenna and the Bluetooth antenna is more serious. Therefore, in order to better meet the user experience, the isolation requirements for the antenna are also higher. The isolation of the antenna refers to the ratio of the signal received by one antenna to the signal of the transmitting antenna when the antenna transmits the signal. The antenna isolation indicates the strength of the electromagnetic coupling between the antennas, and the unit is dB. That is to say, the less signal one antenna receives from another antenna, the higher the isolation between the two antennas and the lower the degree of interference to the antennas.

[0038] At present, the integrated onboard antenna designs multiple WIFI antennas and Bluetooth antennas on the circuit board (PCB board) of the electronic device. The isolation between the WIFI antenna and the Bluetooth antenna is achieved by sacrificing the efficiency of the Bluetooth antenna. For example, the Bluetooth antenna is set as a double-grounded, low-efficiency E-type Bluetooth antenna with the opening facing downward. In this way, the isolation is improved by reducing the total radiation efficiency of the Bluetooth antenna and reducing the return loss. This method has limitations and affects the performance of the Bluetooth antenna. For scenarios where a Bluetooth antenna is required, it will cause problems such as weak signals and data loss, affecting the user experience.

[0039] In order to solve the problem of mutual interference between the WIFI antenna and the Bluetooth antenna of the antenna unit in the related art, an embodiment of the present disclosure provides an antenna unit. The technical solution of the present disclosure is described in detail below through embodiments.

[0040] Figure 1 is a schematic diagram of a planar structure of an antenna unit according to an embodiment of the present disclosure, Figure 2 FIG. 1 is a schematic diagram of a planar structure of an antenna unit according to another embodiment of the present disclosure. Figure 1 and Figure 2As shown, an embodiment of the present disclosure provides an antenna unit, which includes a substrate 10 and a metal layer. The substrate 10 has a first edge 10a extending along a first direction X. The metal layer is located on one side of the substrate 10, and the metal layer includes a ground signal line 20, a Bluetooth antenna 30, a first WIFI antenna 40, and a second WIFI antenna 50. The Bluetooth antenna 30, the first WIFI antenna 40, and the second WIFI antenna 50 are spaced apart from each other along the first direction X at a position close to the first edge 10a.

[0041] The metal layer further includes an isolation branch 60, which is connected to the ground signal line 20. The isolation branch 60 is located between the Bluetooth antenna 30 and the first WIFI antenna 40; and / or, the isolation branch 60 is located between the Bluetooth antenna 30 and the second WIFI antenna 40.

[0042] In the related art, the antenna unit can improve the isolation between the Bluetooth antenna and the Wi-Fi antenna by reducing the performance of the Bluetooth antenna. Although the isolation between the Bluetooth antenna and the WIFI antenna is improved, the performance of the Bluetooth antenna is reduced. For scenarios where the Bluetooth antenna needs to be used for transmission, it will cause problems such as weak signals and data loss, affecting the user experience. In the antenna unit of the embodiment of the present disclosure, the Bluetooth antenna 30 may not use an inefficient E-type antenna, but instead, an isolation branch 60 is provided between the Bluetooth antenna 30 and the WIFI antenna. The isolation branch 60 is grounded. The isolation branch 60 can make the current flow in a zigzag manner, thereby increasing the flow distance of the current, and further improving the isolation between the Bluetooth antenna and the WIFI antenna.

[0043] The antenna unit of the embodiment of the present disclosure is provided with a metal layer on one side of the substrate 10, the metal layer includes a ground signal line 20, a Bluetooth antenna 30, a first WIFI antenna 40 and a second WIFI antenna 50, the Bluetooth antenna 30, the first WIFI antenna 40 and the second WIFI antenna 50 are arranged at intervals from each other along the first direction X at a position close to the first edge 10a, and the metal layer also includes an isolation branch 60 connected to the ground signal line 20, the isolation branch 60 is located between the Bluetooth antenna 30 and the first WIFI antenna 40; and / or, the isolation branch 60 is located between the Bluetooth antenna 30 and the second WIFI antenna 40. In this way, by adding the isolation branch 60 between the Bluetooth antenna 30 and the first WIFI antenna 40, and / or, adding the isolation branch 60 between the Bluetooth antenna 30 and the second WIFI antenna, the isolation between the Bluetooth antenna and the WIFI antenna is improved without affecting the total radiation efficiency of the Bluetooth antenna 30, and no additional matching structure is required, and it can be applied to various Bluetooth antennas and WIFI antennas, with a simple structure, a wider range of application scenarios, and higher versatility.

[0044] Exemplarily, the substrate 10 is a support for electronic components and a carrier for electrical connection between the electronic components. In addition to arranging the antenna, the substrate 10 can also arrange other electronic components. The electronic components can be fixed on the substrate 10 and electrically connected to the wiring on the substrate 10. The disclosed embodiments do not specifically limit the types and quantities of electronic components.

[0045] Exemplarily, the first WIFI antenna 40 includes a first radiator, a first feed end, and a first ground feed end. The first radiator is arranged at a clearance area of ​​the substrate 10. One end of the first feed end is connected to the first radiator, and the other end of the first feed end is connected to the circuit structure on the substrate 10 through a microstrip line, one end of the first ground feed end is connected to the first radiator, and the other end of the first ground feed end is connected to the ground signal line 20.

[0046] Exemplarily, the second WIFI antenna 50 includes a second radiator, a second feed end, and a second ground feed end. The second radiator is arranged at the clearance area of ​​the substrate 10. One end of the second feed end is connected to the second radiator, and the other end of the second feed end is connected to the circuit structure on the substrate through a microstrip line, one end of the second ground feed end is connected to the second radiator, and the other end of the second ground feed end is connected to the ground signal line 20.

[0047] Exemplarily, the Bluetooth antenna 30 includes a third radiator, a third feed terminal and a third ground feed terminal. The third radiator is arranged in the clearance area of ​​the substrate 10, one end of the third feed terminal is connected to the third radiator, and the other end of the third feed terminal is connected to the circuit structure on the substrate through a microstrip line. One end of the third ground feed terminal is connected to the second radiator, and the other end of the third ground feed terminal is connected to the ground signal line 20. The third radiator of the Bluetooth antenna 30 can be F-shaped or L-shaped, and the specific shape of the Bluetooth antenna 30 is not limited. The Bluetooth antenna 30 may not adopt an E-type antenna that reduces efficiency. By setting the isolation branch 60, the isolation degree between the Bluetooth antenna and the WIFI antenna meets the requirements. For example, the Bluetooth antenna 30 can adopt the design of an inverted F antenna.

[0048] It should be noted that the specific structure, size and specific type of the first WIFI antenna 40, the second WIFI antenna 50 and the Bluetooth antenna 30 are not limited here, and the specific shapes of the first radiator, the second radiator and the third radiator are not limited here and can be set according to actual usage requirements.

[0049] In one embodiment, the isolation branch 60 is located between the Bluetooth antenna 30 and the first WIFI antenna 40. The isolation branch 60 can improve the isolation between the Bluetooth antenna 30 and the first WIFI antenna 40, thereby reducing the crosstalk between the Bluetooth antenna 30 and the first WIFI antenna 40 while maintaining the efficiency of the Bluetooth antenna 30.

[0050] In one embodiment, the isolation branch 60 is located between the Bluetooth antenna 30 and the second WIFI antenna 50. The isolation branch 60 can improve the isolation between the Bluetooth antenna 30 and the second WIFI antenna 50, thereby reducing the crosstalk between the Bluetooth antenna 30 and the second WIFI antenna 50 while maintaining the efficiency of the Bluetooth antenna 30.

[0051] In one embodiment, the isolation branch 60 is located between the Bluetooth antenna 30 and the first WIFI antenna 40, and the isolation branch 60 is located between the Bluetooth antenna 30 and the second WIFI antenna 50. It should be noted that the structures of the isolation branch 60 located between the Bluetooth antenna 30 and the first WIFI antenna 40 and the isolation branch 60 located between the Bluetooth antenna 30 and the second WIFI antenna 50 may be the same or different. The isolation branch 60 can improve the isolation between the Bluetooth antenna 30 and the first WIFI antenna 40, and the isolation branch 60 can also improve the isolation between the Bluetooth antenna 30 and the second WIFI antenna 50. Under the premise of maintaining the efficiency of the Bluetooth antenna 30, the crosstalk between the Bluetooth antenna 30 and the first WIFI antenna 40 is reduced, and the crosstalk between the Bluetooth antenna 30 and the second WIFI antenna 50 is reduced, and the crosstalk between the Bluetooth antenna 30, the first WIFI antenna 40, and the second WIFI antenna 50 of the antenna unit has the least effect.

[0052] In one embodiment, the metal layer includes a ground signal line 20, a Bluetooth antenna 30, a first WIFI antenna 40, and a second WIFI antenna 50. Exemplarily, the ground signal line 20 may be located on the first surface of the substrate 10, the Bluetooth antenna 30, the first WIFI antenna 40, and the second WIFI antenna 50 may be located on the second surface of the substrate 10, the first surface and the second surface are arranged opposite to each other, and the first surface and the second surface are provided with a via hole, and the Bluetooth antenna 30, the first WIFI antenna 40, and the second WIFI antenna 50 are electrically connected to the ground signal line 20 by using the via hole, and the isolation branch 60 is located on the second surface, and the isolation branch 60 is connected to the ground signal line 20. Or the ground signal line 20, the Bluetooth antenna 30, the first WIFI antenna 40, and the second WIFI antenna 50 are located on the same surface of the substrate 10.

[0053] Exemplarily, the metal layer is a copper foil metal layer, and of course it can also be other metal planes, which are not listed here one by one.

[0054] In one embodiment, the Bluetooth antenna 30, the first WIFI antenna 40 and the second WIFI antenna can be printed on the substrate 10, and the substrate 10 can be a FR4 sheet material (FR-4 epoxy glass cloth laminate), and the thickness of the substrate 10 can be set according to the use requirements. At the same time, the metal layer is a copper foil metal layer printed on the substrate 10, and the thickness of the copper foil metal layer can be set between 0.01-0.05mm, and various circuit function modules required by electronic equipment can also be set on the substrate 10 (not shown in the figure).

[0055] In one embodiment, the Bluetooth antenna 30 and the first WIFI antenna 40 have the same operating frequency band. The Bluetooth antenna 30 and the first WIFI antenna 40 have the same operating frequency band, which can be the same frequency band implemented by the Bluetooth antenna 30 and the first WIFI antenna 40, or the same frequency band exists in the frequency band implemented by the Bluetooth antenna 30 and the first WIFI antenna 40. For example, the Bluetooth antenna 30 and the first WIFI antenna 40 have the same operating frequency band of 2412MHz-2482MHz, and the embodiment of the present disclosure does not limit the operating frequency band of the antenna unit.

[0056] Since the Bluetooth antenna 30 and the first WIFI antenna 40 have the same operating frequency band, the Bluetooth antenna 30 and the first WIFI antenna 40 simultaneously sending and receiving data in this frequency band will cause co-channel interference. By setting an isolation branch 60 between the Bluetooth antenna 30 and the first WIFI antenna 40, the isolation between the Bluetooth antenna 30 and the first WIFI antenna 40 can be improved, and the co-channel interference can be reduced.

[0057] In one embodiment, the Bluetooth antenna 30 and the second WIFI antenna 50 have the same working frequency band. The Bluetooth antenna 30 and the second WIFI antenna 50 have the same working frequency band, which can be the frequency band implemented by the Bluetooth antenna 30 and the second WIFI antenna 50 is the same frequency, or the frequency band implemented by the Bluetooth antenna 30 and the second WIFI antenna 50 has the same frequency band. For example, the Bluetooth antenna 30 and the second WIFI antenna 50 have the same working frequency band of 2412MHz-2482MHz, and the embodiment of the present disclosure does not limit the working frequency band of the antenna unit.

[0058] Since the Bluetooth antenna 30 and the second WIFI antenna 50 have the same operating frequency band, the Bluetooth antenna 30 and the second WIFI antenna 50 simultaneously sending and receiving data in this frequency band will cause co-channel interference. By providing an isolation branch 60 between the Bluetooth antenna 30 and the second WIFI antenna 50, the isolation between the Bluetooth antenna 30 and the second WIFI antenna 50 can be improved and the co-channel interference can be reduced.

[0059] In one embodiment, the Bluetooth antenna 30 and the first WIFI antenna 40 have the same working frequency band, and the Bluetooth antenna 30 and the second WIFI antenna 50 have the same working frequency band. For example, the Bluetooth antenna 30 and the first WIFI antenna 40 have the same working frequency band of 2412MHz-2482MHz, and the Bluetooth antenna 30 and the second WIFI antenna 50 have the same working frequency band of 2412MHz-2482MHz. The embodiment of the present disclosure does not limit the working frequency band of the antenna unit.

[0060] Reference Figure 1 As shown, in one embodiment, the Bluetooth antenna 30 is located between the first WIFI antenna 40 and the second WIFI antenna 50. The isolation branch 60 includes a first isolation branch 61 located between the Bluetooth antenna 30 and the first WIFI antenna 40; and / or, the isolation branch 60 includes a second isolation branch 62 located between the Bluetooth antenna 30 and the second WIFI antenna 50.

[0061] Reference Figure 1 As shown, the Bluetooth antenna 30 is located between the first WIFI antenna 40 and the second WIFI antenna 50, and the Bluetooth antenna 30, the first WIFI antenna 40, and the second WIFI antenna 50 are spaced apart from each other at a position close to the first edge 10a along the first direction X. The polarization direction of the Bluetooth antenna 30 is perpendicular to the polarization directions of the first WIFI antenna 40 and the second WIFI antenna 50, so that the isolation between the Bluetooth antenna 30 and the first WIFI antenna 40 can be further improved, and the isolation between the Bluetooth antenna 30 and the second WIFI antenna 50 can be improved.

[0062] Exemplarily, the isolation branch 60 includes a first isolation branch 61 located between the Bluetooth antenna 30 and the first WIFI antenna 40 , and the first isolation branch 61 improves the isolation between the Bluetooth antenna 30 and the first WIFI antenna 40 .

[0063] Exemplarily, the isolation branch 60 includes a second isolation branch 62 located between the Bluetooth antenna 30 and the second WIFI antenna 50 , and the second isolation branch 62 improves the isolation between the Bluetooth antenna 30 and the second WIFI antenna 50 .

[0064] Exemplarily, the isolation branch 60 includes a first isolation branch 61 located between the Bluetooth antenna 30 and the first WIFI antenna 40, and the isolation branch 60 includes a second isolation branch 62 located between the Bluetooth antenna 30 and the second WIFI antenna 50. In this way, the isolation of the antenna unit is the best, and the crosstalk between the WIFI antenna and the Bluetooth antenna is minimized.

[0065] Exemplarily, the substrate 10 may be rectangular, the length of the substrate 10 is 65-85 mm, and the width of the substrate 10 is 25-45 mm. For example, the length of the substrate 10 is 76 mm, and the width of the substrate 10 is 40 mm. Due to the limited space and size of the substrate 10, the spatial spacing of the Bluetooth antenna 30, the first WIFI antenna 40, and the second WIFI antenna 50 is limited, and it is not convenient to increase the isolation by increasing the distance between the Bluetooth antenna 30 and the first WIFI antenna 40, and the distance between the Bluetooth antenna 30 and the second WIFI antenna 50. The embodiment of the present disclosure provides a first isolation branch 61 between the Bluetooth antenna 30 and the first WIFI antenna 40, and a second isolation branch 62 between the Bluetooth antenna 30 and the second WIFI antenna 50, thereby achieving the improvement of the isolation between the Bluetooth antenna 30 and the first WIFI antenna 40 and between the Bluetooth antenna 30 and the second WIFI antenna 50 while meeting the size requirements of the onboard antenna.

[0066] like Figure 1 As shown, the first WIFI antenna 40 and the second WIFI antenna 50 are placed on the left and right sides of the substrate 10, and the Bluetooth antenna 30 is placed in the middle of the substrate 10. By adding two first isolation branches 61 and second isolation branches 62 of specific shapes on both sides of the Bluetooth antenna 30, the current flow between the WIFI antenna and the Bluetooth antenna can be effectively isolated, thereby achieving an isolation effect.

[0067] like Figure 1 As shown, in one embodiment, the first isolation branch 61 includes a first sub-branch 611 and a second sub-branch 612. The first sub-branch 611 extends from an end close to the Bluetooth antenna 30 toward the first WIFI antenna 40 and gradually approaches the first edge 10a. The second sub-branch 612 extends from an end of the first sub-branch 611 away from the Bluetooth antenna 30 along the first direction X and gradually away from the Bluetooth antenna 30. The length of the first sub-branch 611 is greater than the length of the second sub-branch 612.

[0068] like Figure 1 As shown, the first sub-branch 611 is arranged at an angle to the first direction, the second sub-branch 612 is extended along the first direction X, and the line width of the first sub-branch 611 and the second sub-branch 612 is 0.5mm-1mm. Through the shape and size matching of the first sub-branch 611 and the second sub-branch 612, the first isolation branch 61 arranged in the space between the Bluetooth antenna 30 and the first WIFI antenna 40 can improve the isolation between the Bluetooth antenna 30 and the first WIFI antenna 40 to above the minimum isolation requirement.

[0069] Exemplarily, the length of the substrate 10 is 76 mm, and the width of the substrate 10 is 40 mm.

[0070] In one embodiment, the distance between the end of the first sub-branch 611 close to the Bluetooth antenna 30 and the Bluetooth antenna 30 is 7.7 mm to 8.7 mm. Exemplarily, the distance between the end of the first sub-branch 611 close to the Bluetooth antenna 30 and the Bluetooth antenna 30 is t1, and t1 is 7.7 mm, 8.0 mm, 8.2 mm, 8.4 mm, and 8.7 mm.

[0071] In one embodiment, the sum of the lengths of the first sub-branch 611 and the second sub-branch 612 is 21.5 mm-22.5 mm. The length of the first sub-branch 611 is d1, the length of the second sub-branch 612 is d2, and the range of d1+d2 is 21.5 mm-22.5 mm. For example, the sum of the lengths of the first sub-branch 611 and the second sub-branch 612 is 21.5 mm, 21.7 mm, 22.0 mm, 22.2 mm, 22.5 mm.

[0072] Figure 3 Schematic diagram of the isolation test results of the Bluetooth antenna and the first WIFI antenna according to the embodiment of the present disclosure. Figure 3 As shown, the test results show that the isolation between the Bluetooth antenna 30 and the first WIFI antenna 40 is improved to more than 23dB, meeting the minimum isolation requirement of 15dB between the antennas, which is more than 5dB higher than that of the related technology without isolation branches, and the average efficiency of the Bluetooth antenna 30 is more than 40%, which is more than 6 times the efficiency of the E-type Bluetooth of the related technical solution.

[0073] In one embodiment, the distance between the end of the first sub-branch 611 close to the Bluetooth antenna 30 and the Bluetooth antenna 30 is 7.7 mm to 8.7 mm, and the sum of the lengths of the first sub-branch 611 and the second sub-branch 612 is 21.5 mm to 22.5 mm.

[0074] It should be noted that the length d1 of the first sub-branch 611 and the length d2 of the second sub-branch 612 can be set according to the actual spacing distance between the Bluetooth antenna and the first WIFI antenna and the substrate size, which is not limited in the embodiment of the present disclosure.

[0075] Reference Figure 1As shown, in one embodiment, the second isolation branch 62 includes a third sub-branch 621, a fourth sub-branch 622, and a fifth sub-branch 623. The third sub-branch 621 extends from one end close to the Bluetooth antenna 30 along the second direction Y and gradually approaches the first edge 10a, the fourth sub-branch 622 extends from one end of the third sub-branch 621 close to the first edge 10a along the first direction X and gradually moves away from the Bluetooth antenna 30, the fifth sub-branch 623 extends from one end of the fourth sub-branch 622 away from the Bluetooth antenna 30 along the second direction Y and gradually moves away from the first edge 10a, the length of the third sub-branch 621 and the length of the fourth sub-branch 624 are both greater than the length of the fifth sub-branch 625, and the second direction Y is perpendicular to the first direction X.

[0076] like Figure 1 As shown, the line width of the third sub-branch 621, the fourth sub-branch 622 and the fifth sub-branch 623 can be set to 0.5mm-1mm. Through the coordination of the shapes and sizes of the third sub-branch 621, the fourth sub-branch 622 and the fifth sub-branch 623, the second isolation branch 62 set in the space between the Bluetooth antenna 30 and the second WIFI antenna 50 can improve the isolation between the Bluetooth antenna 30 and the second WIFI antenna 50 to above the minimum isolation requirement.

[0077] In one embodiment, the distance between the end of the third sub-branch 621 close to the Bluetooth antenna 30 and the Bluetooth antenna 30 is 3.3 mm-4.3 mm. Exemplarily, the distance between the end of the third sub-branch 621 close to the Bluetooth antenna 30 and the Bluetooth antenna 30 is t2, and t2 is 3.3 mm, 3.5 mm, 3.8 mm, 4.0 mm, or 4.3 mm.

[0078] In one embodiment, the sum of the lengths of the third sub-branch 621, the fourth sub-branch 622, and the fifth sub-branch 623 is 26.9 mm-27.9 mm. The length of the third sub-branch 621 is d3, the length of the fourth sub-branch 622 is d4, the length of the fifth sub-branch 623 is d5, and the range of d3+d4+d5 is 26.9 mm-27.9 mm. For example, the sum of the lengths of the third sub-branch 621, the fourth sub-branch 622, and the fifth sub-branch 623 is 26.9 mm, 27.1 mm, 27.4 mm, 27.6 mm, and 27.9 mm.

[0079] Figure 4 Schematic diagram of the isolation test results of the Bluetooth antenna and the second WIFI antenna according to the embodiment of the present disclosure. Figure 4As shown, the test results show that the isolation between the second WIFI antenna 50 and the Bluetooth antenna 30 is improved to more than 15.8dB, meeting the minimum isolation requirement between the antennas, and is more than 5dB higher than that of the related art without isolation branches. In addition, the average efficiency of the Bluetooth antenna 30 is more than 40%, which is more than 6 times the efficiency of the E-type Bluetooth of the related technical solution.

[0080] In one embodiment, the distance between the end of the third sub-branch 621 close to the Bluetooth antenna 30 and the Bluetooth antenna 30 is 3.3 mm-4.3 mm, and the sum of the lengths of the third sub-branch 621, the fourth sub-branch 622 and the fifth sub-branch 623 is 26.9 mm-27.9 mm.

[0081] Reference Figure 2 As shown, in one embodiment, the Bluetooth antenna 30, the first WIFI antenna 40, and the second WIFI antenna 50 are arranged in sequence along the first direction X. The isolation branch 60 includes a third isolation branch 63 located between the Bluetooth antenna 30 and the first WIFI antenna 40. The third isolation branch 63 includes a sixth sub-branch 631, a seventh sub-branch 632, and an eighth sub-branch 633. The sixth sub-branch 631 extends from one end close to the Bluetooth antenna 30 along the first direction X and gradually moves away from the Bluetooth antenna 30, the seventh sub-branch 632 extends from one end of the sixth sub-branch 631 away from the Bluetooth antenna 30 along the second direction Y and gradually moves away from the first edge 10a, and the eighth sub-branch 633 extends from one end of the seventh sub-branch 632 away from the first edge 10a along the first direction X and gradually approaches the Bluetooth antenna 30. The second direction Y is perpendicular to the first direction X, and the lengths of the sixth sub-branch 631, the seventh sub-branch 632, and the eighth sub-branch 633 decrease in sequence.

[0082] like Figure 2 As shown, the Bluetooth antenna 30, the first WIFI antenna 40, and the second WIFI antenna 50 are arranged in sequence along the first direction X, and the first WIFI antenna 40 is located between the Bluetooth antenna 30 and the second WIFI antenna 50. The polarization direction of the first WIFI antenna 40 is perpendicular to the polarization direction of the Bluetooth antenna 30 and the second WIFI antenna 50, so that the isolation between the first WIFI antenna 40 and the Bluetooth antenna 30 can be further improved.

[0083] Exemplarily, the length of the substrate 10 is 70 mm, and the width of the substrate 10 is 30 mm.

[0084] like Figure 2As shown, the line widths of the sixth sub-branch 631, the seventh sub-branch 632, and the eighth sub-branch 633 can be set to 0.5 mm-1 mm. Through the coordination of the shapes and sizes of the sixth sub-branch 631, the seventh sub-branch 632, and the eighth sub-branch 633, the third isolation branch 63 set in the space between the Bluetooth antenna 30 and the first WIFI antenna 40 can improve the isolation between the Bluetooth antenna 30 and the first WIFI antenna 40 to above the minimum isolation requirement.

[0085] In one embodiment, the distance between the end of the sixth sub-branch 633 close to the Bluetooth antenna 30 and the Bluetooth antenna 30 is 4.5 mm-5.5 mm. Exemplarily, the distance between the end of the sixth sub-branch 633 close to the Bluetooth antenna 30 and the Bluetooth antenna 30 is t3, and t3 is 4.5 mm, 4.7 mm, 5.0 mm, 5.2 mm, and 5.5 mm.

[0086] In one embodiment, the distance between the end of the eighth sub-branch 633 close to the first WIFI antenna 40 and the first WIFI antenna 40 is 9.3 mm-10.3 mm. Exemplarily, the distance between the end of the eighth sub-branch 633 close to the first WIFI antenna 40 and the first WIFI antenna 40 is t4, and t4 is 9.3 mm, 9.5 mm, 9.8 mm, 10.0 mm, and 10.3 mm.

[0087] In one embodiment, the sum of the lengths of the sixth sub-branch 631, the seventh sub-branch 632, and the eighth sub-branch 633 is 17 mm-18 mm. The length of the sixth sub-branch 631 is d6, the length of the seventh sub-branch 632 is d7, the length of the eighth sub-branch 633 is d8, and the range of d6+d7+d8 is 17 mm-18 mm. For example, the sum of the lengths of the sixth sub-branch 631, the seventh sub-branch 632, and the eighth sub-branch 633 is 17 mm, 17.2 mm, 17.5 mm, 17.7 mm, 18 mm.

[0088] In one embodiment, the distance between the end of the sixth sub-branch 633 close to the Bluetooth antenna 30 and the Bluetooth antenna 30 is 9.3mm-10.3mm, the distance between the end of the eighth sub-branch 633 close to the first WIFI antenna 40 and the first WIFI antenna 40 is 9.3mm-10.3mm, and the sum of the lengths of the sixth sub-branch 631, the seventh sub-branch 632 and the eighth sub-branch 633 is 17mm-18mm.

[0089] Figure 5 Schematic diagram of the isolation test results of the Bluetooth antenna and the first WIFI antenna according to the embodiment of the present disclosure. Figure 5As shown in the figure, the test results show that the isolation between the first WIFI antenna 40 and the Bluetooth antenna 30 is increased to more than 18dB, meeting the minimum isolation requirement of 15dB, which is more than 8dB higher than without isolation. In addition, the average efficiency of the Bluetooth antenna 30 is more than 46%, which is more than 11 times the efficiency of the existing Bluetooth solution.

[0090] As a second aspect of the embodiments of the present disclosure, the embodiments of the present disclosure provide an electronic device, including the antenna unit described in any embodiment of the present disclosure. It should be noted that the embodiments of the present disclosure do not limit the specific type of the electronic device. For example, the electronic device may be a mobile phone, a television, etc. The electronic device may also be a smart furniture such as a smart speaker or other products.

[0091] The antenna unit and other components of the electronic device in the above embodiment may adopt various technical solutions known to ordinary technicians in this field now and in the future, and will not be described in detail here.

[0092] In the description of this specification, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present disclosure and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present disclosure.

[0093] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the present disclosure, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0094] In the present disclosure, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, an electrical connection, or a communication; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present disclosure can be understood according to specific circumstances.

[0095] In the present disclosure, unless otherwise clearly specified and limited, a first feature being “above” or “below” a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being “above”, “above”, and “above” a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being “below”, “below”, and “below” a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0096] The disclosure above provides many different embodiments or examples to implement different structures of the present disclosure. In order to simplify the present disclosure, the components and settings of specific examples are described above. Of course, they are only examples, and the purpose is not to limit the present disclosure. In addition, the present disclosure can repeat reference numbers and / or reference letters in different examples, and this repetition is for the purpose of simplification and clarity, and does not itself indicate the relationship between the various embodiments and / or settings discussed.

[0097] The above are only specific embodiments of the present disclosure, but the protection scope of the present disclosure is not limited thereto. Any technician familiar with the technical field can easily think of various changes or substitutions within the technical scope disclosed in the present disclosure, which should be included in the protection scope of the present disclosure. Therefore, the protection scope of the present disclosure should be based on the protection scope of the claims.

Claims

1. An antenna unit, characterized in that: include: a substrate having a first edge extending along a first direction; a metal layer, located on one side of the substrate, the metal layer comprising a ground signal line, a Bluetooth antenna, a first WIFI antenna and a second WIFI antenna, the Bluetooth antenna, the first WIFI antenna and the second WIFI antenna being spaced apart from each other along the first direction at a position close to the first edge; Wherein, the metal layer further includes an isolation branch, the isolation branch is connected to the ground signal line, and the isolation branch is located between the Bluetooth antenna and the first WIFI antenna; and / or the isolation branch is located between the Bluetooth antenna and the second WIFI antenna.

2. The antenna unit according to claim 1, characterized in that The Bluetooth antenna and the first WIFI antenna have the same operating frequency band; and / or the Bluetooth antenna and the second WIFI antenna have the same operating frequency band.

3. The antenna unit according to claim 1, characterized in that The Bluetooth antenna is located between the first WIFI antenna and the second WIFI antenna; The isolation branch comprises a first isolation branch located between the Bluetooth antenna and the first WIFI antenna; And / or, the isolation branch includes a second isolation branch located between the Bluetooth antenna and the second WIFI antenna.

4. The antenna unit according to claim 3, characterized in that The first isolation branch includes a first sub-branch and a second sub-branch. The first sub-branch extends from an end close to the Bluetooth antenna toward the first WIFI antenna and gradually approaches the first edge. The second sub-branch extends from an end of the first sub-branch away from the Bluetooth antenna along the first direction and gradually away from the Bluetooth antenna. The length of the first sub-branch is greater than the length of the second sub-branch.

5. The antenna unit according to claim 4, characterized in that The distance between the end of the first sub-branch close to the Bluetooth antenna and the Bluetooth antenna is 7.7 mm to 8.7 mm; and / or, The sum of the lengths of the first sub-branch and the second sub-branch is 21.5 mm-22.5 mm.

6. The antenna unit according to claim 3, characterized in that: The second isolation branch includes a third sub-branch, a fourth sub-branch and a fifth sub-branch. The third sub-branch extends from an end close to the Bluetooth antenna along the second direction and gradually approaches the first edge. The fourth sub-branch extends from an end of the third sub-branch close to the first edge along the first direction and gradually moves away from the Bluetooth antenna. The fifth sub-branch extends from an end of the fourth sub-branch away from the Bluetooth antenna along the second direction and gradually moves away from the first edge. The length of the third sub-branch and the length of the fourth sub-branch are both greater than the length of the fifth sub-branch, and the second direction is perpendicular to the first direction.

7. The antenna unit according to claim 6, characterized in that The distance between one end of the third sub-branch close to the Bluetooth antenna and the Bluetooth antenna is 3.3 mm-4.3 mm; and / or, The sum of the lengths of the third sub-branch, the fourth sub-branch and the fifth sub-branch is 26.9 mm-27.9 mm.

8. The antenna unit according to claim 1, characterized in that The Bluetooth antenna, the first WIFI antenna, and the second WIFI antenna are arranged in sequence along the first direction, the isolation branch includes a third isolation branch located between the Bluetooth antenna and the first WIFI antenna, the third isolation branch includes a sixth sub-branch, a seventh sub-branch, and an eighth sub-branch, the sixth sub-branch extends from an end close to the Bluetooth antenna along the first direction and gradually moves away from the Bluetooth antenna, the seventh sub-branch extends from an end of the sixth sub-branch away from the Bluetooth antenna along the second direction and gradually moves away from the first edge, the eighth sub-branch extends from an end of the seventh sub-branch away from the first edge along the first direction and gradually approaches the Bluetooth antenna, the second direction is perpendicular to the first direction, and the lengths of the sixth sub-branch, the seventh sub-branch, and the eighth sub-branch decrease in sequence.

9. The antenna unit according to claim 8, characterized in that The distance between one end of the sixth sub-branch close to the Bluetooth antenna and the Bluetooth antenna is 4.5 mm-5.5 mm; and / or, The distance between one end of the eighth sub-branch close to the first WIFI antenna and the first WIFI antenna is 9.3 mm-10.3 mm; and / or, The sum of the lengths of the sixth sub-branch, the seventh sub-branch and the eighth sub-branch is 17mm-18mm.

10. An electronic device, characterized in that: The invention comprises the antenna unit according to any one of claims 1 to 9.

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