CN113690613A - WiFi module and method for improving isolation between WiFi antenna and BT antenna - Google Patents
WiFi module and method for improving isolation between WiFi antenna and BT antenna Download PDFInfo
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- CN113690613A CN113690613A CN202110925797.6A CN202110925797A CN113690613A CN 113690613 A CN113690613 A CN 113690613A CN 202110925797 A CN202110925797 A CN 202110925797A CN 113690613 A CN113690613 A CN 113690613A
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- 238000002955 isolation Methods 0.000 title claims abstract description 35
- 238000000034 method Methods 0.000 title claims description 16
- 230000008878 coupling Effects 0.000 claims abstract description 86
- 238000010168 coupling process Methods 0.000 claims abstract description 86
- 238000005859 coupling reaction Methods 0.000 claims abstract description 86
- 230000003071 parasitic effect Effects 0.000 claims abstract description 64
- 239000004744 fabric Substances 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 6
- 239000002184 metal Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
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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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- 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]
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
- H04N21/41—Structure of client; Structure of client peripherals
- H04N21/426—Internal components of the client ; Characteristics thereof
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W88/00—Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
- H04W88/02—Terminal devices
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- Computer Networks & Wireless Communication (AREA)
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Abstract
A WiFi module comprises a PCB, a WiFi antenna and a BT antenna; the PCB board is provided with a main board and a clearance area, and the WiFi antenna and the BT antenna are both arranged on the clearance area. According to the invention, the clearance area and the parasitic coupling unit are additionally arranged between the WiFi antenna and the BT antenna on the PCB, so that the clearance area and the parasitic coupling unit are mutually offset with the electromagnetic coupling generated between the original WiFi antenna and the BT antenna, the surface wave coupling can be greatly reduced, and the antenna isolation is improved.
Description
Technical Field
The invention provides a WiFi module, particularly relates to a WiFi module with isolation between a WiFi antenna and a BT antenna, and belongs to the technical field of television terminal equipment.
Background
Because the WIFI module is limited by the whole environment and the assembly position, the size of the PCB of the WIFI module is smaller, and the distance between the WIFI antenna and the BT antenna on the PCB is smaller. Electromagnetic coupling exists between the two antennas; the coupling mode mainly has two modes of space coupling and surface wave coupling. The surface traveling wave excited by the antenna on the main board generates secondary radiation when meeting the board edge, the device, the shielding case and the like, the antenna directional pattern is influenced, and the surface wave is coupled to another port, namely the feeding point of another antenna. The space coupling and the surface wave coupling between the antennas can lead the isolation between the two antennas to be poor, and the phenomenon of blockage when the television is connected with the Bluetooth equipment can occur in the actual use.
Can increase the distance between WIFI antenna and the BT antenna among the prior art, thereby reduce the space coupling between the antenna and improve the isolation between WIFI antenna and BT antenna, mainly have following two kinds of modes:
1. the area of increase WIFI module increases the distance between the antenna, but increase WIFI module can increase the cost, and the position that the WIFI module can be assembled to the complete television set also can reduce simultaneously.
2. The BT antenna can be changed to a pull-out antenna and connected to the module by a coaxial line, thereby increasing the distance between the antennas, but also increasing the cost.
In view of the above, there is a need for a new WiFi module to solve the problems of the prior art.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides a WiFi module and a method for improving the isolation between a WiFi antenna and a BT antenna. The novel clearance area is additionally arranged between the WiFi antenna and the BT antenna and is arranged at the edge of the PCB, and the clearance area also comprises a part of main board, and the parasitic coupling unit is introduced to be arranged on the part of the main board. Therefore, the invention opens up another coupling channel between the WiFi antenna and the BT antenna artificially by adding the clearance area and the parasitic coupling unit to offset the coupling with the original coupling, thereby greatly reducing the surface wave coupling and improving the isolation of the antenna.
According to a first embodiment of the present invention, a WiFi module is provided.
A WiFi module comprises a PCB, a WiFi antenna and a BT antenna. The PCB board is provided with a main board and a clearance area, and the WiFi antenna and the BT antenna are both arranged on the clearance area.
In the present invention, the WiFi module further includes a parasitic coupling unit. The parasitic coupling unit is arranged on the main board, and the parasitic coupling unit is arranged between the WiFi antenna and the BT antenna.
Preferably, the parasitic coupling units are arranged in plurality and are uniformly distributed at the edge position of the main board between the WiFi antenna and the BT antenna.
Preferably, the WiFi antenna and the BT antenna are respectively provided with at least one, and the WiFi antenna and the BT antenna are distributed on the clearance area in a pairwise adjacent mode.
Preferably, the WiFi antenna includes a first antenna radiator, a first feeding pin, and a first feeding foot. The first antenna radiator is arranged on the clearance area, one end of a first feed foot is connected with the first antenna radiator, the other end of the first feed foot is connected with the chip end through a microstrip line, one end of a first feed foot is connected with the first antenna radiator, and the other end of the first feed foot is connected with the mainboard ground.
Preferably, the BT antenna includes a second antenna radiator, a second feeding pin, and a second feeding foot. The second antenna radiator is arranged on the clearance area, one end of a second feed pin is connected with the second antenna radiator, the other end of the second feed pin is connected with the chip end through a microstrip line, one end of a second feed foot is connected with the second antenna radiator, and the other end of the second feed foot is connected with the mainboard ground.
Preferably, the length of the PCB is 70-90mm, and the width of the PCB is 30-40 mm.
Preferably, the clearance area is arranged at a partial position on the edge of the PCB, and the mainboard is arranged on the PCB without the clearance area.
According to a second embodiment of the present invention, a method for improving isolation between a WiFi antenna and a BT antenna on a WiFi module is provided.
A method for improving the isolation between a WiFi antenna and a BT antenna on a WiFi module comprises the following steps:
1) a clearance area is additionally arranged between the adjacent WiFi antenna and the adjacent BT antenna;
2) and a parasitic coupling unit is arranged on part of the main board ground at the edge of the PCB.
Preferably, the part of the main plate in step 2) is partially disposed in the clearance area in step 1).
In the invention, the WiFi module comprises a PCB board, a WiFi antenna and a BT antenna. The PCB board includes mainboard ground and headroom area, the headroom area sets up be close to marginal part position department on the PCB board, mainboard ground sets up no headroom position department on the PCB board, wiFi antenna and BT antenna all set up on the headroom area. In the present invention, the WiFi module further includes a parasitic coupling unit. The parasitic coupling unit is arranged on the main board, and the parasitic coupling unit is arranged between the WiFi antenna and the BT antenna. In the invention, a clearance zone is additionally arranged between the WiFi antenna and the BT antenna, the additionally arranged clearance zone is positioned at the edge of the PCB, a part of mainboard ground is arranged in the clearance zone, and the parasitic coupling unit is arranged on the part of mainboard ground. And the main board ground in the central area of the PCB is used for laying metal wires. The WiFi antenna and the BT antenna are arranged in the clearance area, and the influence of the metal wire on the WiFi antenna and the BT antenna is reduced.
In the present invention, as shown in fig. 1, the clearance areas are disposed at four corners of the PCB and between the upper and lower long edges along the length direction of the PCB, the BT antenna is disposed in the clearance area at the upper left corner of the PCB, the WiFi antenna is disposed in the clearance area at the upper right corner and the lower right corner of the PCB, when the length of the PCB is 80mm and the width is 35mm, the clearance area is disposed on the PCB, the clearance area is in a convex shape, and the growth range of the clearance area is as follows: taking the top point of the upper left corner of the PCB as a starting point, moving the PCB to the right for 36mm along the upper edge of the PCB, then moving the PCB downwards for 4mm, then moving the PCB to the left for 20mm, then moving the PCB downwards for 3mm, then moving the PCB to the right for 48mm, then moving the PCB upwards for 3mm, then moving the PCB to the left for 20mm, and finally moving the PCB upwards for 4 mm; the convex-shaped area generated by the growth path is the clearance area arranged on the upper side of the PCB, two rectangular gaps formed between the convex-shaped clearance area and the upper side of the PCB are two parasitic coupling units, the length of each parasitic coupling unit is 20mm, and the width of each parasitic coupling unit is 4 mm. Be equipped with a headroom district below the PCB board, this headroom district is L shape, and this headroom district growth range is as follows: taking the top point of the lower left corner of the PCB as a starting point, moving the PCB to the right for 40mm along the lower edge of the PCB, then moving the PCB upwards for 4mm, then moving the PCB to the right for 24mm, then moving the PCB downwards for 2mm, then moving the PCB to the left for 20mm, and finally moving the PCB downwards for 2 mm; the L-shaped area generated by the growth path is a clearance area arranged on the lower side of the PCB, a rectangular gap formed between the L-shaped clearance area and the lower side of the PCB is a parasitic coupling unit, and the parasitic coupling unit has a length of 20mm and a width of 2 mm. The growth range of a parasitic coupling unit arranged in the clearance area at the lower left corner of the PCB is as follows: taking the top point of the lower left corner of the PCB as a starting point, moving the PCB to the right for 8mm along the lower edge of the PCB, then moving the PCB upwards for 4mm, then moving the PCB to the left for 2mm, then moving the PCB downwards for 2mm, then moving the PCB to the left for 4mm, then moving the PCB upwards for 8mm, and finally moving the PCB to the left for 2 mm; the hook-shaped area formed along the growth path is the parasitic coupling unit in the lower left corner clearance area. The right side of the PCB is provided with two L-shaped parasitic occasional units, wherein the growth range of the L-shaped parasitic coupling unit arranged in the clean area at the lower right corner is as follows, the L-shaped parasitic coupling unit takes the vertex at the lower right corner as a starting point, moves upwards for 6mm along the right side of the PCB, then moves leftwards for 2mm, then moves upwards for 8mm, then moves leftwards for 6mm, then moves upwards for 2mm, and finally moves rightwards for 8 mm; an L-shaped area formed by the growth path is a parasitic coupling unit in the lower right corner clearance area; the growth range of the L-shaped parasitic coupling unit arranged in the upper right corner clearance area is as follows, the top point of the upper right corner is taken as a starting point, the L-shaped parasitic coupling unit moves downwards 8mm along the right side of the PCB, then moves leftwards for 2mm, then moves downwards for 6mm, then moves leftwards for 6mm, then moves downwards for 2mm, and finally moves rightwards for 8 mm; the L-shaped region formed by the growth path is the parasitic coupling unit in the upper right corner clearance area. Therefore, two parasitic coupling units are arranged between every two antennas, the electromagnetic coupling generated between the two antennas can be effectively reduced, and the isolation between the two antennas is improved.
Preferably, the number of the parasitic coupling units is set to be multiple, for example, 2, 3, 4 … …, where the number of the parasitic coupling units should be adjusted according to the size of the PCB board actually used and the distance between the WiFi antenna and the BT antenna. In the invention, the length of the PCB is 70-90mm, and the width of the PCB is 30-40 mm. More preferably, the length is 80mm and the width is 35 mm. Therefore, the number of the parasitic coupling units between each adjacent WiFi antenna and BT antenna is preferably two, and the parasitic coupling units are uniformly distributed at the edge position of the main board between the WiFi antenna and the BT antenna. In this application, the WiFi antenna and the BT antenna are provided with at least one, for example, 1, 2, 3, 4 … …, the number of the WiFi antenna and the BT antenna should be adjusted according to actual needs and the size of a PCB board actually used, if a WiFi template with a length of 80mm and a width of 35mm is adopted in this application, the number of the WiFi antennas is preferably 2, the number of the BT antennas is preferably 1, the number of parasitic coupling units is preferably 6, the WiFi antennas and the BT antenna are adjacently distributed on the clearance area in pairs, the 6 parasitic coupling units are divided into three groups, and the two parasitic coupling units are set on a main board between the three antennas.
Preferably, the WiFi antenna includes a first antenna radiator, a first feeding pin, and a first feeding foot. The first antenna radiator is arranged on the clearance area, one end of the first feed pin is connected with the first antenna radiator, and the other end of the first feed pin is connected with the chip end through a microstrip line. The BT antenna comprises a second antenna radiator, a second feed pin and a second feed foot. The second antenna radiator sets up on the headroom district, second feed foot one end with the second antenna radiator is connected, and the second feed foot other end passes through microstrip line and chip end to be connected, and this technique belongs to technical staff common sense in the field, consequently microstrip line and chip end do not show in this application, the second is presented lower margin one end with the second antenna radiator is connected, and the second is presented the lower margin other end and is connected with mainboard ground. The feed pins and the feed feet in the two antennas are connected with each other and support the upper part of the antenna radiator, so that the upper surfaces of the two antennas are more easily adsorbed by the SMT patch.
In the prior art, because there is electromagnetic coupling between wiFi antenna and the BT antenna in the WiFi module, the isolation between the two antennas is poor, and the phenomenon of jamming occurs when the television is connected with Bluetooth equipment in actual use. Therefore, the invention also provides a method for improving the isolation between the WiFi antenna and the BT antenna in the WiFi module. The method is characterized in that a clearance area and a parasitic coupling unit are additionally arranged to artificially open another coupling channel between the WiFi antenna and the BT antenna, so that the coupling channel and the original coupling are mutually offset, the surface wave coupling can be greatly reduced, and the isolation degree of the antenna is improved.
The invention provides a method for improving the isolation between a WiFi antenna and a BT antenna by a WiFi module, which solves the problem that the electromagnetic coupling between the WiFi antenna and the BT antenna in the WiFi module influences the connection of an electronic device and a Bluetooth device.
It should be noted that, in the present invention, when there are a plurality of WiFi antennas, a clearance area and a parasitic coupling unit are also disposed between adjacent WiFi antennas, and the positions of the clearance area and the parasitic coupling unit are the same as those described above.
In the prior art, researchers have reliably tested WiFi-2.4G type antennas as shown in fig. 3, and as shown in fig. 4-6, the following research results are found in the frequency range of 2.4GHz to 2.5 GHz: under the condition of not increasing a parasitic coupling unit, the isolation between the WIFI-1 antenna and the WIFI-2 antenna is about-9 dB; the isolation between the WIFI-1 antenna and the BT antenna is about-13 dB; the isolation between the WIFI-2 antenna and the BT antenna is about-16 dB; after two parasitic coupling units are added between two adjacent antennas, the isolation between the WIFI-1 antenna and the WIFI-2 antenna is less than-21 dB; the isolation between the WIFI-1 antenna and the BT antenna is less than-22 dB; the isolation between the WIFI-2 antenna and the BT antenna is about < -23 dB; therefore, by using the method of the invention, the parasitic coupling unit is additionally arranged between the WiFi antenna and the BT antenna, and the isolation between the antennas can be effectively improved.
Compared with the prior art, the technical scheme of the invention has the following beneficial technical effects:
according to the invention, another coupling channel is artificially opened between the WiFi antenna and the BT antenna on the PCB, namely, a clearance area and a parasitic coupling unit are additionally arranged between the WiFi antenna and the BT antenna, so that the clearance area and the parasitic coupling unit are mutually offset with the original coupling, the surface wave coupling can be greatly reduced, and the antenna isolation is improved.
Drawings
FIG. 1 is a schematic top view of a WiFi module of the present invention;
FIG. 2 is a schematic perspective view of a WiFi module of the present invention;
FIG. 3 is a schematic structural diagram of a WiFi antenna in the WiFi module of the present invention;
FIG. 4 is a schematic diagram of a BT antenna in a WiFi module of the present invention;
FIG. 5 is a schematic diagram of a WiFi-2.4G antenna structure designed by the method of the present invention;
FIG. 6 is a schematic diagram illustrating a comparison of the isolation between the WIFI-1 antenna and the BT antenna in the WiFi-2.4G antenna of FIG. 5;
FIG. 7 is a schematic diagram illustrating a comparison of the isolation between the WIFI-1 antenna and the WIFI-2 antenna in the WiFi-2.4G antenna of FIG. 5;
fig. 8 is a schematic diagram illustrating a comparison of the isolation between the WiFi-2 antenna and the BT antenna in the WiFi-2.4G antenna of fig. 5.
Reference numerals: 1: a PCB board; 101: a main board ground; 102: a clean-out area; 2: a WiFi antenna; 201: a first antenna radiator; 202: a first feed pin; 203: a first feed leg; 3: a BT antenna; 301: a second antenna radiator; 302: a second feed pin; 303: a third feed leg; 4: a parasitic coupling element.
Detailed Description
The technical solution of the present invention is illustrated below, and the claimed scope of the present invention includes, but is not limited to, the following examples.
According to a first embodiment of the present invention, a WiFi module is provided.
As shown in fig. 1, a WiFi module includes a PCB board 1, a WiFi antenna 2, and a BT antenna 3. The PCB board 1 comprises a main board ground 101 and a clearance area 102, and the WiFi antenna 2 and the BT antenna 3 are both arranged on the clearance area 102.
As shown in fig. 2, in the present invention, the WiFi module further includes a parasitic coupling unit 4. The parasitic coupling unit 4 is disposed on the main board ground 101, and the parasitic coupling unit 4 is disposed between the WiFi antenna 2 and the BT antenna 3.
Preferably, the parasitic coupling units 4 are provided in plurality and are distributed at the edge of the main board 101 between the WiFi antenna 2 and the BT antenna 3.
Preferably, at least one WiFi antenna 2 and at least one BT antenna 3 are disposed, and the WiFi antennas 2 and the BT antennas 3 are distributed on the clearance area 102 in a pairwise adjacent manner.
As shown in fig. 3, the WiFi antenna 2 preferably includes a first antenna radiator 201, a first feeding pin 202, and a first feeding foot 203. The first antenna radiator 201 is arranged on the clearance area 102, one end of the first feed pin 202 is connected with the first antenna radiator 201, the other end of the first feed pin 202 is connected with a chip end through a microstrip line, one end of the first feed foot 203 is connected with the first antenna radiator 201, and the other end of the first feed foot 203 is connected with the mainboard ground 101.
As shown in fig. 4, the BT antenna 3 preferably includes a second antenna radiator 301, a second feed pin 302, and a second feed pin 303. The second antenna radiator 301 is arranged on the clearance area 102, one end of the second feed pin 302 is connected with the second antenna radiator 301, the other end of the second feed pin 302 is connected with the chip end through a microstrip line, one end of the second feed pin 303 is connected with the second antenna radiator 301, and the other end of the second feed pin 303 is connected with the mainboard ground 101.
Preferably, the length of the PCB board 1 is 70-90mm, and the width of the PCB board 1 is 30-40 mm.
Preferably, the clearance area 102 is disposed at a partial position on the edge of the PCB board 1, and the main board ground 101 is disposed on the PCB board 1 at the clearance-free area 102.
Example 1
As shown in fig. 1, a WiFi module includes a PCB board 1, a WiFi antenna 2, and a BT antenna 3. The PCB board 1 comprises a main board ground 101 and a clearance area 102, and the WiFi antenna 2 and the BT antenna 3 are both arranged on the clearance area 102.
Example 2
As shown in fig. 2, embodiment 1 is repeated except that in the present invention, the WiFi module further includes a parasitic coupling unit 4. The parasitic coupling unit 4 is disposed on the main board ground 101, and the parasitic coupling unit 4 is disposed between the WiFi antenna 2 and the BT antenna 3.
Example 3
Example 4
Example 5
As shown in fig. 3, embodiment 4 is repeated, except that the WiFi antenna 2 includes a first antenna radiator 201, a first feeding pin 202 and a first feeding foot 203. The first antenna radiator 201 is arranged on the clearance area 102, one end of the first feed pin 202 is connected with the first antenna radiator 201, the other end of the first feed pin 202 is connected with a chip end through a microstrip line, one end of the first feed foot 203 is connected with the first antenna radiator 201, and the other end of the first feed foot 203 is connected with the mainboard ground 101.
Example 6
As shown in fig. 4, embodiment 5 is repeated except that the BT antenna 3 includes a second antenna radiator 301, a second feed pin 302, and a second feed pin 303. The second antenna radiator 301 is arranged on the clearance area 102, one end of the second feed pin 302 is connected with the second antenna radiator 301, the other end of the second feed pin 302 is connected with the chip end through a microstrip line, one end of the second feed pin 303 is connected with the second antenna radiator 301, and the other end of the second feed pin 303 is connected with the mainboard ground 101.
Example 7
Example 6 was repeated except that the length of the PCB panel 1 was 80mm and the width of the PCB panel 1 was 35 mm.
Example 8
Embodiment 7 is repeated except that the clearance area 102 is provided at a partial position on the edge of the PCB board 1 and the main board ground 101 is provided on the PCB board 1 without the clearance area 102.
Example 9
A method for improving the isolation between a WiFi antenna and a BT antenna on a WiFi module comprises the following steps:
1) a clearance area 102 is added between the adjacent WiFi antenna 2 and BT antenna 3.
2) A parasitic coupling element 4 is arranged on a part of the main board portion 101 at the edge of the PCB board 1.
Example 10
Embodiment 9 is repeated except that the partial main plate portion 101 in step 2) is disposed in the clean zone 102 in step 1).
Application example 1
As shown in fig. 5, the method of embodiment 9 is applied to a WiFi-2.4G type antenna in the existing market, a WiFi-1 antenna, a WiFi-2 antenna and a BT antenna are arranged on a PCB board 1, a clearance area 102 and two parasitic coupling units 4 are arranged between the WiFi-1 antenna and the WiFi-2 antenna, a clearance area 102 and two parasitic coupling units 4 are arranged between the WiFi-1 antenna and the BT antenna, and a clearance area 102 and two parasitic coupling units 4 are arranged between the WiFi-2 antenna and the BT antenna. As shown in fig. 6-8, before the parasitic coupling unit 4 is not disposed in the WiFi-2.4G type antenna, the isolation between the WiFi-1 antenna and the WiFi-2 antenna is about-9 dB; the isolation between the WIFI-1 antenna and the BT antenna is about-13 dB; the isolation between the WIFI-2 antenna and the BT antenna is about-16 dB. After two parasitic coupling units are added between two adjacent antennas, the isolation between the WIFI-1 antenna and the WIFI-2 antenna is less than-21 dB; the isolation between the WIFI-1 antenna and the BT antenna is less than-22 dB; the isolation between the WIFI-2 antenna and the BT antenna is about < -23 dB.
Therefore, by adopting the method in the invention, the isolation between the WiFi antenna and the BT antenna can be obviously improved.
Claims (10)
1. A WiFi module, characterized in that: the WiFi module comprises a PCB, a WiFi antenna and a BT antenna; the PCB board is provided with a main board and a clearance area, and the WiFi antenna and the BT antenna are both arranged on the clearance area.
2. The WiFi module of claim 1, wherein: the WiFi module further comprises a parasitic coupling unit, wherein the parasitic coupling unit is arranged on the mainboard ground, and the parasitic coupling unit is arranged between the WiFi antenna and the BT antenna.
3. The W1 ifii module of claim 2, wherein: parasitic coupling unit is equipped with a plurality ofly, and equally divide the mainboard ground border position of cloth between wiFi antenna and BT antenna.
4. The WiFi module of any one of claims 3, wherein: the WiFi antenna and the BT antenna are at least one and are distributed on the clearance area in a pairwise adjacent mode.
5. The WiFi module of any one of claims 4, wherein: the WiFi antenna comprises a first antenna radiating body, a first feed foot and a first feed foot, wherein the first antenna radiating body is arranged on the clearance area, one end of the first feed foot is connected with the first antenna radiating body, the other end of the first feed foot is connected with the chip end through a microstrip line, one end of the first feed foot is connected with the first antenna radiating body, and the other end of the first feed foot is connected with the mainboard.
6. The WiFi module of any one of claims 4, wherein: the BT antenna comprises a second antenna radiator, a second feed pin and a second feed foot, the second antenna radiator is arranged on the clearance area, one end of the second feed pin is connected with the second antenna radiator, the other end of the second feed pin is connected with the chip end through a microstrip line, one end of the second feed foot is connected with the second antenna radiator, and the other end of the second feed foot is connected with the mainboard ground.
7. The WiFi module of any of claims 1, wherein: the length of the PCB is 70-90mm, and the width of the PCB is 30-40 mm.
8. The WiFi module of any of claims 1, wherein: the clearance area is arranged at a partial position on the edge of the PCB, and the main board is arranged on the PCB without the clearance area.
9. A method for improving the isolation between a WiFi antenna and a BT antenna on a WiFi module comprises the following steps:
1) a clearance area is additionally arranged between the adjacent WiFi antenna and the adjacent BT antenna;
2) and a parasitic coupling unit is arranged on part of the main board ground at the edge of the PCB.
10. The method of claim 9, wherein: the part of the main board in the step 2) is partially arranged in the clearance area in the step 1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110925797.6A CN113690613A (en) | 2021-08-12 | 2021-08-12 | WiFi module and method for improving isolation between WiFi antenna and BT antenna |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110925797.6A CN113690613A (en) | 2021-08-12 | 2021-08-12 | WiFi module and method for improving isolation between WiFi antenna and BT antenna |
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| Publication Number | Publication Date |
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| CN113690613A true CN113690613A (en) | 2021-11-23 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110925797.6A Pending CN113690613A (en) | 2021-08-12 | 2021-08-12 | WiFi module and method for improving isolation between WiFi antenna and BT antenna |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106252882A (en) * | 2016-09-29 | 2016-12-21 | 深圳市信维通信股份有限公司 | The parasitic low section high-isolation mimo antenna of a kind of coupling |
| CN209088055U (en) * | 2018-10-31 | 2019-07-09 | 深圳市中天迅通信技术股份有限公司 | A kind of biradial arm WIFI antenna |
| CN110165383A (en) * | 2019-06-24 | 2019-08-23 | 深圳市三极技术有限公司 | Multi-standard module antenna system and mobile terminal |
| CN211017410U (en) * | 2019-11-28 | 2020-07-14 | 深圳市同博威科技有限公司 | High-isolation PCB antenna structure |
| CN211789533U (en) * | 2020-04-10 | 2020-10-27 | 深圳市中天迅通信技术股份有限公司 | Structure for improving isolation of small-size dual-frequency WIFI and BT three antennas |
-
2021
- 2021-08-12 CN CN202110925797.6A patent/CN113690613A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106252882A (en) * | 2016-09-29 | 2016-12-21 | 深圳市信维通信股份有限公司 | The parasitic low section high-isolation mimo antenna of a kind of coupling |
| CN209088055U (en) * | 2018-10-31 | 2019-07-09 | 深圳市中天迅通信技术股份有限公司 | A kind of biradial arm WIFI antenna |
| CN110165383A (en) * | 2019-06-24 | 2019-08-23 | 深圳市三极技术有限公司 | Multi-standard module antenna system and mobile terminal |
| CN211017410U (en) * | 2019-11-28 | 2020-07-14 | 深圳市同博威科技有限公司 | High-isolation PCB antenna structure |
| CN211789533U (en) * | 2020-04-10 | 2020-10-27 | 深圳市中天迅通信技术股份有限公司 | Structure for improving isolation of small-size dual-frequency WIFI and BT three antennas |
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