CN208548979U - A kind of circuit and television set promoting WIFI module radio-frequency performance - Google Patents
A kind of circuit and television set promoting WIFI module radio-frequency performance Download PDFInfo
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- CN208548979U CN208548979U CN201821289348.7U CN201821289348U CN208548979U CN 208548979 U CN208548979 U CN 208548979U CN 201821289348 U CN201821289348 U CN 201821289348U CN 208548979 U CN208548979 U CN 208548979U
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Abstract
The utility model discloses a kind of circuits and television set for promoting WIFI module radio-frequency performance, the WIFI module is configured with two WIFI antennas, two PCB traces are etched on the pcb board for connecting the WIFI antenna, at least one section formation can the equivalent broken line shape at inductance ingredient in each PCB trace；One end of two PCB traces connects one to one with two WIFI antennas respectively, and the other end separately, forms spacer region, two PCB traces equivalent capacitive component out at spacer region by the area Fei Loutong on pcb board；The inductance ingredient and capacitive component constitute the isolation circuit being connected between two WIFI antennas, it is possible thereby to improve the isolation of radio frequency, inhibit co-channel interference.Meanwhile by adding filter circuit respectively in the high speed data transmission line road near WIFI module and in radio-frequency power supply circuit, High-frequency Interference can be filtered out, the radio-frequency performance of WIFI module is promoted.
Description
Technical field
The utility model belongs to radio circuit technical field, specifically, being to be related to a kind of penetrating for promotion WIFI module
Frequency performance and the circuit design proposed and the television set based on the circuit.
Background technique
With the fast development of smart television, the radio function for needing to realize on smart television is increasing, 2.4G frequency
The WIFI and Bluetooth function of WIFI, 5G frequency range of section have become the essential communication of current smart television.
In smart television, WIFI module and bluetooth module are often integrated, and WIFI module often configures two double double hairs of receipts
Antenna, to improve the coverage area of WIFI signal.Since the isolation between two WIFI antennas is lower, and 2.4G frequency range
Therefore the common signal channel that WIFI signal and Bluetooth signal share 2.4G frequency range is easy to produce same band interference, leads to smart television
Bluetooth performance be affected.
In addition, it is often laid with high speed data transfer circuit in WIFI module and bluetooth module near circuitry, such as
USB data transmission circuit etc..High-speed data can generate High-frequency Interference in transmission process, WIFI signal to 2.4G frequency range and
Bluetooth signal impacts.
In addition, being also easy the shadow by environmental interference sources for the radio-frequency power supply for WIFI module and bluetooth module power supply
It rings, causes the ripple in power supply to increase, to influence the radio-frequency performance of WIFI module and bluetooth module.
Based on the above many factors, the radio function development of smart television is limited, affects use to a certain extent
The usage experience at family.
Summary of the invention
The purpose of this utility model is to provide a kind of for promoting the circuit design of WIFI module radio-frequency performance, to improve
The wireless performance of product.
In order to solve the above technical problems, the utility model is achieved using following technical scheme:
The utility model proposes a kind of circuit for promoting WIFI module radio-frequency performance, the WIFI module in one aspect
Configured with two WIFI antennas, two PCB traces are etched on the pcb board for connecting the WIFI antenna, are walked in each PCB
At least one section formation can the equivalent broken line shape at inductance ingredient in line；One end of two PCB traces is respectively with described two
Root WIFI antenna connects one to one, and the other end separately, forms spacer region by the area Fei Loutong on pcb board, and two PCB are walked
Line is equivalent at capacitive component at the spacer region；The inductance ingredient and capacitive component composition be connected to two WIFI antennas it
Between isolation circuit.
Preferably, it is described can the equivalent broken line shape at inductance ingredient be preferably U-shaped or flat U-shaped.
Shadow is caused to the radio-frequency performance of WIFI module in order to solve the High-frequency Interference that high-speed data generates in transmission process
Loud problem, the utility model are directed on the pcb board at the position of the neighbouring WIFI antenna and two PCB traces
The case where being laid with high speed data transmission line road, using the side for connecting L-type filter circuit in the high speed data transmission line road
Formula filters out the High-frequency Interference that high-speed data generates in transmission process, to promote the radio-frequency performance of WIFI module.
Further, the WIFI module receives the working power of radio-frequency power supply module output, and the working power includes
For in WIFI module power amplifier power supply amplifier power supply, be in WIFI module RF switch power supply Switching Power Supply with
And the bluetooth power supply for bluetooth module power supply.In order to reduce the electromagnetic interference of radio-frequency power supply module, the utility model is in transmission institute
It states and is separately connected ground capacity on the route of amplifier power supply, Switching Power Supply and bluetooth power supply, the capacitance of the ground capacity is small
In being equal to 10pF, to filter out the High-frequency Interference in power supply.
It is designed based on foregoing circuit, the utility model also proposed a kind of television set, including WIFI module, radio-frequency power supply mould
Block and pcb board, the WIFI module are configured with two WIFI antennas, are etched with two on the pcb board for connecting the WIFI antenna
PCB trace, in each PCB trace at least one section formed can the equivalent broken line shape at inductance ingredient；Two PCB are walked
One end of line connects one to one with two WIFI antennas respectively, and the other end is alternate by the area Fei Loutong on pcb board
Every forming spacer region, two PCB traces are equivalent at capacitive component at the spacer region；The inductance ingredient and capacitive component
Constitute the isolation circuit being connected between two WIFI antennas.
The utility model also proposed on the other hand another structure type for promoting WIFI module radio frequency
The circuit of energy, the WIFI module are configured with two WIFI antennas, are connected with isolation circuit between two WIFI antennas,
It include at least two inductance and at least one capacitor in the isolation circuit, described two inductance are connected to two
Between WIFI antenna and ground, the capacitance connection is between two inductance.
Further, described two inductance are the first inductance and the second inductance, and the capacitor is first capacitor；Described first
Inductance is connected between first WIFI antenna and ground after connecting with first resistor, and first WIFI antenna passes through the second electricity
Hold ground connection；Second inductance is connected between second WIFI antenna and ground after connecting with second resistance, and described second
WIFI antenna passes through third capacity earth；The first capacitor and 3rd resistor be in parallel and with third inductance and the 4th resistance string
After connection, it is connected between first inductance and the second inductance.
Further, the isolation circuit is laid on pcb board, and the utility model is for neighbouring on the pcb board
The case where being laid with high speed data transmission line road at the position of the WIFI antenna and the isolation circuit, using in the high speed
The mode of L-type filter circuit is connected in data transmission link, to solve the High-frequency Interference that high-speed data generates in transmission process
The problem of radio-frequency performance of WIFI module is impacted.
In order to further enhance the radio-frequency performance of WIFI module, the utility model increases filter circuit in a power,
Specifically, the WIFI module receives the working power of radio-frequency power supply module output, and the working power includes for WIFI mould
In block power amplifier power supply amplifier power supply, in WIFI module RF switch power supply Switching Power Supply and be bluetooth
The bluetooth power supply of module for power supply is separately connected ground connection on the route for transmitting the amplifier power supply, Switching Power Supply and bluetooth power supply
Capacitor, the capacitance for configuring the ground capacity are less than or equal to 10pF, to filter out the High-frequency Interference in power supply, reduce in power supply
Ripple.
It is designed based on foregoing circuit, the utility model also proposed a kind of television set, including WIFI module, radio-frequency power supply mould
Block and pcb board, the WIFI module are configured with two WIFI antennas, and isolation electricity is connected between two WIFI antennas
Road, includes at least two inductance and at least one capacitor in the isolation circuit, and described two inductance are connected to two
Between root WIFI antenna and ground, the capacitance connection is between two inductance.
Compared with prior art, the advantages and positive effects of the utility model are as follows: the utility model passes through in connection WIFI
Isolation circuit is added between two WIFI antennas of module, it is possible thereby to the isolation of radio frequency be improved, for being integrated with bluetooth function
It for the WIFI module of energy, can effectively inhibit co-channel interference, avoid the WIFI signal of 2.4G frequency range from generating Bluetooth signal dry
It disturbs, guarantees the WIFI performance and bluetooth performance of product.Meanwhile by the high speed data transmission line road near WIFI module with
And filter circuit is added respectively in the radio-frequency power supply circuit for WIFI module power supply, High-frequency Interference can be effectively filtered out, is promoted
The radio-frequency performance of WIFI module.The circuit of the utility model is applied in smart television product, smart television can be improved
Radio function improves the usage experience of user.
After the detailed description of the utility model embodiment is read in conjunction with the figure, other features and advantages of the utility model
It will become clearer.
Detailed description of the invention
In order to illustrate more clearly of the technical scheme in the embodiment of the utility model, will make below to required in embodiment
Attached drawing is briefly described, it should be apparent that, the accompanying drawings in the following description is some embodiments of the utility model, right
For those of ordinary skill in the art, without creative efforts, it can also be obtained according to these attached drawings
His attached drawing.
Fig. 1 is a kind of PCB trace figure of embodiment of isolation circuit；
Fig. 2 is a kind of circuit diagram of embodiment of isolation circuit；
Fig. 3 is a kind of circuit diagram of the embodiment for the radio frequency filter circuit being connected in high speed data transmission line road；
Fig. 4 is a kind of circuit diagram of embodiment of radio-frequency power supply circuit.
Specific embodiment
Specific embodiment of the present utility model is described in detail with reference to the accompanying drawing.
The present embodiment is in order to promote the radio-frequency performance of WIFI module, first in terms of the isolation for improving module, design every
It from circuit, is connected between two WIFI antennas of WIFI module, for inhibiting co-channel interference.
For the isolation circuit, the present embodiment proposes two kinds of design schemes: one is formed by the way of PCB trace
Equivalent inductance ingredient and capacitive component, as shown in Figure 1；Another kind be it is direct select inductance element connected with capacity cell and
At as shown in Figure 2.
It can be in the pcb board 3 for connecting two WIFI antennas 1,2 referring to Fig. 1 for the first isolation circuit design scheme
On etch two PCB traces 10,20.By one end 11,21 of two PCB traces 10,20 respectively with two WIFI antennas 1,2 one
One is correspondingly connected with, and by the other end 12 of two PCB traces 10,20,22 a distances spaced apart, forms spacer region 30.Described
Septal area 30 is the area Fei Loutong on pcb board 3, that is, not etched part on pcb board 3.Using this wire laying mode, two PCB
Cabling 10,20 is at the spacer region 30 from electrically can be equivalent at capacitive component C.In addition, to two PCB traces 10,20
Bending shape carry out special designing, make include in each PCB trace 10,20 at least one section can be equivalent at inductance ingredient
The broken line shape of L, as a result, just between two WIFI antennas 1,2 it is equivalent go out one formed by inductance ingredient and capacitive component
Isolation circuit.
As a kind of preferred embodiment of the present embodiment, the broken line shape is preferably designed to U-shaped or flat U-shaped, that is, can be with
At least one section of U-shaped cabling 13,23 is respectively formed in each PCB trace 10,20, this section of U-shaped cabling 13,23 electrically may be used
With equivalent at inductance ingredient L.The quantity that U section cabling is formed in PCB trace 10,20 is different, equivalent inductance ingredient out
Inductance is different, can calculate the inductance of inductance ingredient according to the design requirement of isolation, is then determined according to inductance
Several sections of U-shaped cablings are needed to form in each PCB trace 10,20 out, and then finally determine the specific curved of PCB trace 10,20
Shape is rolled over, enables and plays the role of effectively inhibiting co-channel interference by the equivalent isolation circuit out of PCB trace 10,20.
In addition, the region on the pcb board 3 around WIFI antenna 1,2 and two PCB traces 10,20 can also etch
The area Lou Tong 31 is grounded by a piece of area Lou Tong 31 out, to form the empty regions of two WIFI antennas 1,2, guarantees two
The radio-frequency performance of WIFI antenna 1,2.
For second of isolation circuit design scheme, referring to fig. 2, inductance component L 6, L11 and capacity cell can be used
C16 designs the isolation circuit.Specifically, the first inductance L6 can be connected to first WIFI antenna ANT1 and ground
Between GND, the second inductance L11 is connected between second WIFI antenna ANT2 and ground GND, first capacitor C16 is connected to
Between first inductance L6 and the second inductance L11, to realize the isolation design between antenna.
As a kind of preferred design of the present embodiment, after the first inductance L6 being connected with first resistor R5, then
It is connected between first WIFI antenna ANT1 and ground GND, and the second capacitor C5 can also be configured and be connected to described first
Between WIFI antenna ANT1 and ground GND.First inductance L6, first resistor R5 and the second capacitor C5 can be regarded as in Fig. 1 by
The equivalent inductance ingredient L out of one PCB trace 10.Similarly, after the second inductance L11 being connected with second resistance R10, then connect
It connects between second WIFI antenna ANT2 and ground GND, and third capacitor C17 can also be configured and be connected to described second
Between WIFI antenna ANT2 and ground GND.Second inductance L11, second resistance R10 and third capacitor C17 can be regarded as in Fig. 1 by
The equivalent inductance ingredient L out of Article 2 PCB trace 20.First capacitor C16 can it is in parallel with 3rd resistor R9 after, then with third electricity
Sense L7 and the 4th resistance R7 is connected in series, and is then connected between two inductance ingredients.First capacitor C16,3rd resistor R9, third
Inductance L7 and the 4th resistance R7 can be regarded as being formed by the equivalent electricity out of spacer region 30 by two articles of PCB traces 10,20 in Fig. 1
Rongcheng divides C.In other words, Fig. 2 can be regarded as to the equivalent circuit diagram of Fig. 1.
In two WIFI antennas 1,2(ANT1, ANT2) between lay isolation circuit as shown in Figure 1 or 2, for integrated
For having the WIFI module of Bluetooth function, the isolation of radio frequency can be effectively promoted, improves radio range, and to 2.4G frequency range
WIFI signal and Bluetooth signal play the role of inhibit co-channel interference, then reach promoted WIFI module radio-frequency performance mesh
's.
Secondly, in order to further enhance the radio-frequency performance of WIFI module, the present embodiment is to being laid in WIFI module and described
Data transmission circuit near isolation circuit improves.When be laid on pcb board and be used for transmission the route of high-speed data away from
When from WIFI module or the closer isolation circuit, data generate during high-speed transfer in order to prevent High-frequency Interference pair
The radio-frequency performance of WIFI module impacts, and the present embodiment preferably adds radio frequency filter circuit in high speed data transmission line road,
Such as the L-type filter circuit being made of inductance and capacitor, with prevent 2.4G frequency range WIFI signal and Bluetooth signal by high frequency
Interference.
Fig. 3 is illustrated by taking USB data transmission circuit as an example.When installation position of the USB data transmission circuit on pcb board
It, can be in connection USB interface when the isolation circuit being connected between two WIFI antennas apart from WIFI module or distance is closer
L-type filter circuit is laid on the data line of two differential data terminals DN, DP of J1.For example, inductance L1, L2 can be gone here and there respectively
It is associated in two differential data lines, two capacitors C1, C2 is connected to two between differential data line and ground, utilize inductance
L1 and capacitor C1(inductance L2 and capacitor C2) High-frequency Interference generated during USB data transmission is filtered out, then improve WIFI mould
The radio-frequency performance of block.
Furthermore, it is contemplated that the radio-frequency power supply for WIFI module power supply is influenced by environmental interference sources, cause in power supply
When ripple increases, the radio-frequency performance of WIFI module can also be impacted, periphery electricity of the present embodiment to radio-frequency power supply module I C1
Road improves design, increases electric source filter circuit, to reduce the electromagnetic interference of power supply.
As shown in figure 4, the radio-frequency power supply module I C1 of the present embodiment can provide two groups of working powers for WIFI module, often
Include: in one group of working power in WIFI module power amplifier power supply amplifier power supply AVDD33_WF0_A_PA,
AVDD33_WF1_A_PA；For Switching Power Supply AVDD33_WF0_PA_G, AVDD33_ of the RF switch power supply in WIFI module
WF1_PA_G；For emission power AVDD33_WF0_A_TX, AVDD33_WF1_A_TX of the transmit circuit power supply in WIFI module.
For the WIFI module for being integrated with Bluetooth function, the radio-frequency power supply module I C1 can also provide bluetooth power supply AVDD33_
BT powers for bluetooth module.In the present embodiment, each road power supply is preferably arranged to the DC power supply VDD33 of 3.3V.
In order to further increase the radio-frequency performance of WIFI module, the amplifier power supply is being transmitted in the present embodiment selection
AVDD33_WF0_A_PA, AVDD33_WF1_A_PA, Switching Power Supply AVDD33_WF0_PA_G, AVDD33_WF1_PA_G and indigo plant
It is separately connected ground capacity C7, C8, C9, C11, C14 on the route of tooth power supply AVDD33_BT, and configures the ground capacity
The capacitance of C7, C8, C9, C11, C14 are less than or equal to 10pF, to effectively filter out the High-frequency Interference in power supply, reduce in power supply
Ripple.
Meanwhile transmitting the amplifier power supply AVDD33_WF0_A_PA, AVDD33_WF1_A_PA, emission power
It can also be separately connected and connect on the route of AVDD33_WF0_A_TX, AVDD33_WF1_A_TX and bluetooth power supply AVDD33_BT
Ground capacitor C6, C10, C12, C13, C15, and configure described ground capacity C6, C10, C12, C13, C15 capacitance be greater than etc.
In 100nF, to effectively filter out the low-frequency disturbance in power supply, purer working power is provided for WIFI module.
The present embodiment is penetrated from the isolation for promoting WIFI antenna, the High-frequency Interference for inhibiting high speed data transfer to generate, reduction
Three aspects of electromagnetic interference of frequency power promote the radio-frequency performance of WIFI module, can effectively solve WIFI module anti-interference
The problems such as difference, Bluetooth signal are vulnerable to interference, is applied in the smart televisions product such as current LCD TV, can improve intelligence
The radio function of energy TV, improves the usage experience of user.
Certainly, above embodiments are only to illustrate the technical solution of the utility model, rather than its limitations；Although referring to before
Embodiment is stated the utility model is described in detail, those skilled in the art should understand that: it still can be with
It modifies the technical solutions described in the foregoing embodiments or equivalent replacement of some of the technical features；And
These are modified or replaceed, the spirit for various embodiments of the utility model technical solution that it does not separate the essence of the corresponding technical solution
And range.
Claims (10)
1. a kind of circuit for promoting WIFI module radio-frequency performance, the WIFI module are configured with two WIFI antennas, feature exists
In being etched with two PCB traces on the pcb board for connecting the WIFI antenna, at least one section of shape in each PCB trace
At can the equivalent broken line shape at inductance ingredient；One end of two PCB traces is a pair of with two WIFI antennas one respectively
It should connect, the other end separately, forms spacer region, two PCB traces are at the spacer region by the area Fei Loutong on pcb board
It is equivalent at capacitive component；The inductance ingredient and capacitive component constitute the isolation circuit being connected between two WIFI antennas.
2. it is according to claim 1 promoted WIFI module radio-frequency performance circuit, which is characterized in that it is described can be equivalent at electricity
The broken line shape for feeling ingredient is U-shaped or flat U-shaped.
3. the circuit according to claim 1 for promoting WIFI module radio-frequency performance, which is characterized in that on the pcb board
It is laid with high speed data transmission line road at the position of the neighbouring WIFI antenna and two PCB traces, in the high speed number
According to being connected with L-type filter circuit in transmission line.
4. the circuit according to any one of claim 1 to 3 for promoting WIFI module radio-frequency performance, which is characterized in that institute
The working power that WIFI module receives the output of radio-frequency power supply module is stated, the working power includes putting for the power in WIFI module
The amplifier power supply of big device power supply, for the RF switch power supply in WIFI module Switching Power Supply and be bluetooth module power supply indigo plant
Tooth power supply is connected separately with ground capacity on the route for transmitting the amplifier power supply, Switching Power Supply and bluetooth power supply, described to connect
The capacitance of ground capacitor is less than or equal to 10pF.
5. a kind of television set is provided with WIFI module, radio-frequency power supply module and pcb board；It is characterized in that, being additionally provided with such as right
It is required that the circuit of promotion WIFI module radio-frequency performance described in any one of 1 to 4.
6. a kind of circuit for promoting WIFI module radio-frequency performance, the WIFI module are configured with two WIFI antennas, feature exists
In, be connected with isolation circuit between two WIFI antennas, include in the isolation circuit at least two inductance and
At least one capacitor, described two inductance are connected between two WIFI antennas and ground, and the capacitance connection is in two electricity
Between sense.
7. the circuit according to claim 6 for promoting WIFI module radio-frequency performance, which is characterized in that described two inductance are
First inductance and the second inductance, the capacitor are first capacitor；First inductance is connected to first after connecting with first resistor
Between root WIFI antenna and ground, first WIFI antenna passes through the second capacity earth；Second inductance and second resistance
It is connected to after series connection between second WIFI antenna and ground, second WIFI antenna passes through third capacity earth；Described
After one capacitor is in parallel with 3rd resistor and connects with third inductance and the 4th resistance, it is connected to first inductance and the second electricity
Between sense.
8. the circuit according to claim 6 for promoting WIFI module radio-frequency performance, which is characterized in that the isolation circuit cloth
It is located on pcb board, is laid with high-speed data at the position of the neighbouring WIFI antenna and the isolation circuit on the pcb board
Transmission line is connected with L-type filter circuit in the high speed data transmission line road.
9. the circuit of promotion WIFI module radio-frequency performance according to any one of claim 6 to 8, which is characterized in that institute
The working power that WIFI module receives the output of radio-frequency power supply module is stated, the working power includes putting for the power in WIFI module
The amplifier power supply of big device power supply, for the RF switch power supply in WIFI module Switching Power Supply and be bluetooth module power supply indigo plant
Tooth power supply is connected separately with ground capacity on the route for transmitting the amplifier power supply, Switching Power Supply and bluetooth power supply, described to connect
The capacitance of ground capacitor is less than or equal to 10pF.
10. a kind of television set is provided with WIFI module, radio-frequency power supply module and pcb board；It is characterized in that, being additionally provided with such as power
Benefit require any one of 6 to 9 described in promotion WIFI module radio-frequency performance circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821289348.7U CN208548979U (en) | 2018-08-10 | 2018-08-10 | A kind of circuit and television set promoting WIFI module radio-frequency performance |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821289348.7U CN208548979U (en) | 2018-08-10 | 2018-08-10 | A kind of circuit and television set promoting WIFI module radio-frequency performance |
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| CN208548979U true CN208548979U (en) | 2019-02-26 |
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ID=65426162
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| CN201821289348.7U Active CN208548979U (en) | 2018-08-10 | 2018-08-10 | A kind of circuit and television set promoting WIFI module radio-frequency performance |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113644412A (en) * | 2020-05-11 | 2021-11-12 | 深圳Tcl数字技术有限公司 | Signal transmission device |
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2018
- 2018-08-10 CN CN201821289348.7U patent/CN208548979U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113644412A (en) * | 2020-05-11 | 2021-11-12 | 深圳Tcl数字技术有限公司 | Signal transmission device |
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