CN206402205U - A kind of audio frequency apparatus of anti-interference high frequency transmission circuit and high-frequency emission - Google Patents
A kind of audio frequency apparatus of anti-interference high frequency transmission circuit and high-frequency emission Download PDFInfo
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- CN206402205U CN206402205U CN201621176730.8U CN201621176730U CN206402205U CN 206402205 U CN206402205 U CN 206402205U CN 201621176730 U CN201621176730 U CN 201621176730U CN 206402205 U CN206402205 U CN 206402205U
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Abstract
The utility model is applied to high-frequency electronic field there is provided a kind of anti-interference high frequency transmission circuit and the audio frequency apparatus of high-frequency emission, and the circuit includes：High-frequency emission communication unit and first antenna, the second antenna；And, switch the switch unit of startup between first antenna and the second antenna when by external interference, its input is connected with the output end of high-frequency emission communication unit, its input of two output ends respectively with the first matching unit and high-frequency amplifying unit is connected；The output end of high-frequency amplifying unit and the input of bandpass filter are connected, and the output end of bandpass filter is connected with the input of the second matching unit, and the output end of the first matching unit and the second matching unit connects first antenna and the second antenna respectively.The utility model is after current transmitting antenna is by environmental disturbances, and switching starts another antenna and launched, and effectively prevent environment interference, improves the reliability of high frequency transmission signal, be optimal transmitting.
Description
Technical field
The utility model belongs to high-frequency electronic field, more particularly to a kind of anti-interference high frequency transmission circuit and high-frequency emission
Audio frequency apparatus.
Background technology
The antenna of high frequency wireless audio products general at present is used using individual antenna design, but in complicated 2.4G
In high frequency environment, the transmitting of 2.4G wireless audio products may be due to other 2.4G antenna interference or due to the interference of barrier
Cause transmitting TX signals to be deteriorated, influence the launcher reliability of high-frequency signal.
Utility model content
The purpose of the utility model embodiment is to provide a kind of anti-interference high frequency transmission circuit, it is intended to solve existing high frequency
Audio product uses single-antenna transmission, easily by interference the problem of.
The utility model embodiment is achieved in that a kind of anti-interference high frequency transmission circuit, and the circuit includes：
High-frequency emission communication unit, first antenna, the second antenna；And
Switch the switch unit of startup, the switching list between first antenna and the second antenna when by external interference
The input of member is connected with the output end of the high-frequency emission communication unit；
The first matching unit matched to first antenna, the input of first matching unit and the switching are single
The first output end connection of member, the output end of first matching unit is connected with a connection end of the first antenna, described
Another connection end ground connection of first antenna；
The high-frequency amplifying unit that the high-frequency signal that the high-frequency emission communication unit is exported is amplified, the high frequency is put
The input of big unit is connected with the second output end of the switch unit, the communication ends of the high-frequency amplifying unit and the height
Take place frequently and penetrate the communication ends connection of communication unit；
Bandpass filter, the input of the bandpass filter is connected with the output end of the high-frequency amplifying unit；
The second matching unit matched to the second antenna, input and the band logical of second matching unit are filtered
The output end connection of ripple device, the output end of second matching unit is connected with a connection end of second antenna, and described the
Another connection end ground connection of two antennas.
Further, the switch unit is UPG2179TB type analog switches.
Further, the first antenna is inverted F shaped antenna, and second antenna is unipole antenna.
Further, first matching unit includes：
Electric capacity C6, electric capacity C16 and inductance L1；
One end of the inductance L1 is grounded for the input of first matching unit by the electric capacity C16, the electricity
The sense L1 other end is grounded for the output end of first matching unit by the electric capacity C6.
Further, the communication ends of the high-frequency amplifying unit include the first communication ends, the second communication ends and threeway
Believe end, the high-frequency amplifying unit includes：
Resistance R10, resistance R11, resistance R12, resistance R13, electric capacity C3, electric capacity C4, electric capacity C5, electric capacity C14, electric capacity C15,
Electric capacity C17, electric capacity C20, electric capacity C21, electric capacity C22, electric capacity C26, electric capacity C30, inductance L2, inductance L3, inductance L5, inductance L7 and
High-frequency amplifier；
One end of the electric capacity C21 be the high-frequency amplifying unit input, the other end of the electric capacity C21 with it is described
Electric capacity C22 one end connection, the other end of the electric capacity C22 is connected with the rf inputs of the high-frequency amplifier, the height
The power end of audio amplifier is grounded by the electric capacity C17, the power end of the high-frequency amplifier also with the inductance L2 one
End connection, the one end, one end of the electric capacity C4 and the electric capacity C5 of the other end of the inductance L2 simultaneously with the electric capacity C3
One end connection, the other end of the other end of the electric capacity C3, the other end of the electric capacity C4 and the electric capacity C5 is grounded simultaneously,
The other end of the inductance L2 is also connected with supply voltage, and the one end of one end of the electric capacity C5 also with the inductance L3 is connected, institute
The other end for stating inductance L3 is connected with the RF output end of the high-frequency amplifier, and the RF output end of the high-frequency amplifier is also
It is connected simultaneously with one end of the electric capacity C14 and one end of the inductance L5, the other end ground connection of the electric capacity C14, the electricity
The sense L5 other end is grounded by the electric capacity C15, and the one end of the other end of the inductance L5 also with the electric capacity C20 is connected,
The other end of the electric capacity C20 is the output end of the high-frequency amplifying unit, and the biased electrical source of the high-frequency amplifier is simultaneously
One end of one end, one end of the resistance R13 and the electric capacity C30 with the resistance R12 is connected, and the electric capacity C30's is another
One end is grounded, and the other end of the resistance R12, the other end of the resistance R13 are respectively the first of the high-frequency amplifying unit
Communication ends, the second communication ends, the first reference edge of the high-frequency amplifier are connected with one end of the resistance R11, the high frequency
Second reference edge of amplifier is connected with one end of the resistance R10, the other end of the resistance R10 and the resistance R11's
The other end is grounded by the electric capacity C26, and the one end of the other end of the resistance R10 also with the inductance L7 is connected, described
The inductance L7 other end is the third communication end of the high-frequency amplifying unit.
Further, the bandpass filter is ACX/BF2520-B2R4CAA type bandpass filters.
Further, second matching unit includes：
Resistance R9 and electric capacity C24；
One end of the resistance R9 is grounded for the input of second matching unit by the electric capacity C24, the electricity
The other end for hindering R9 is the output end of second matching unit.
The another object of the utility model embodiment is to include the height of above-mentioned anti-interference high frequency transmission circuit there is provided a kind of
Take place frequently the audio frequency apparatus penetrated.
The utility model embodiment is after current transmitting antenna is by environmental disturbances, and switching starts another antenna and sent out
Penetrate, effectively prevent environment interference, improve the reliability of high frequency transmission signal, be optimal transmitting.
Brief description of the drawings
The structure chart for the anti-interference high frequency transmission circuit that Fig. 1 provides for the utility model embodiment；
The exemplary circuit figure for the anti-interference high frequency transmission circuit that Fig. 2 provides for the utility model embodiment；
Fig. 3 launches the example of communication unit for the anti-interference high frequency transmission circuit medium-high frequency that the utility model embodiment is provided
Circuit diagram.
Embodiment
In order that the purpose of this utility model, technical scheme and advantage are more clearly understood, below in conjunction with accompanying drawing and implementation
Example, the utility model is further elaborated.It should be appreciated that specific embodiment described herein is only to explain
The utility model, is not used to limit the utility model.In addition, institute in each embodiment of the utility model disclosed below
As long as the technical characteristic being related to does not constitute conflict and can be just mutually combined each other.
The utility model embodiment is after current transmitting antenna is by environmental disturbances, and switching starts another antenna and sent out
Penetrate, effectively prevent environment interference, improve the reliability of high frequency transmission signal, be optimal transmitting.
Fig. 1 shows the structure for the anti-interference high frequency transmission circuit that the utility model embodiment is provided, for convenience of description,
It illustrate only the part related to the utility model.
As the embodiment of the utility model one, the audio that the anti-interference high frequency transmission circuit can apply to high-frequency emission is set
In standby, the anti-interference high frequency transmission circuit includes：
High-frequency emission communication unit 11, first antenna 14, the second antenna 18；And
Switch the switch unit 12 of startup, switch unit between first antenna and the second antenna when by external interference
12 input is connected with the output end of high-frequency emission communication unit 11；
The first matching unit 13 matched to first antenna, input and the switch unit 12 of the first matching unit 13
The connection of the first output end, the output end of the first matching unit 13 is connected with a connection end of first antenna 14, first antenna 14
Another connection end ground connection；
The high-frequency amplifying unit 15 that the high-frequency signal that high-frequency emission communication unit is exported is amplified, high-frequency amplifying unit
15 input is connected with the second output end of switch unit 12, communication ends and the high-frequency emission communication unit of high-frequency amplifying unit 15
The communication ends connection of member 11；
Bandpass filter 16, the input of bandpass filter 16 is connected with the output end of high-frequency amplifying unit 15；
The second matching unit 17 matched to the second antenna, the input and bandpass filter of the second matching unit 17
16 output end connection, the output end of the second matching unit 17 is connected with a connection end of the second antenna 18, the second antenna 18
Another connection end ground connection.
In the utility model embodiment, the interference signal such as there is WIFI, BT in environment causes letter to first antenna
Number interference when, switch unit switching start the second antenna, by the second antenna launch TX signals, to ensure the transmitting of high-frequency signal
Without interruption, the reliability of high-frequency signal transmitting is improved.
Certainly, when being launched using the second antenna, if the second antenna receives the interference of environment, it again may be by
Switch unit switching starts first antenna, is converted to first antenna transmitting high-frequency signal.
Herein, first antenna and the second antenna should choose different types of antenna, and such as first antenna 14 uses reversed F-typed day
Line, the second antenna 18 uses unipole antenna, and two kinds of antennas complement each other, each other thermal compensation signal, when one of signal intensity not
During enough or interruption, start another antenna immediately, to strengthen the ability of Antagonistic Environment interference, so as to reach that signal sends, connect
The integrality of receipts.
The utility model embodiment is after current transmitting antenna is by environmental disturbances, and switching starts another antenna and sent out
Penetrate, effectively prevent environment interference, improve the reliability of high frequency transmission signal, be optimal transmitting.
Fig. 2 shows the exemplary circuit structure for the anti-interference high frequency transmission circuit that the utility model embodiment is provided, in order to
It is easy to explanation, illustrate only the part related to the utility model.
As the embodiment of the utility model one, switch unit 12 can use UPG2179TB type analog switches, also may be used certainly
To be realized using other on-off circuits.
As the embodiment of the utility model one, the first matching unit 13 includes：
Electric capacity C6, electric capacity C16 and inductance L1；
Inductance L1 one end is grounded for the input of the first matching unit by electric capacity C16, and the inductance L1 other end is the
The output end of one matching unit is grounded by electric capacity C6.
Second matching unit 17 includes：
Resistance R9 and electric capacity C24；
Resistance R9 one end is grounded for the input of the second matching unit by electric capacity C24, and the resistance R9 other end is the
The output end of two matching units.
Bandpass filter 16 is ACX/BF2520-B2R4CAA type bandpass filters.
The utility model embodiment is after current transmitting antenna is by environmental disturbances, and switching starts another antenna and sent out
Penetrate, effectively prevent environment interference, improve the reliability of high frequency transmission signal, be optimal transmitting.
Fig. 3 shows the anti-interference high frequency transmission circuit medium-high frequency transmitting communication unit that the utility model embodiment is provided
Exemplary circuit structure, for convenience of description, illustrate only the part related to the utility model.
As the embodiment of the utility model one, the communication ends of high-frequency amplifying unit 15 include the first communication ends IO10_
PIN43, pair of the second communication ends IO10_PIN41 and third communication end PIN59_TX_EN respectively with high-frequency emission communication unit 11
Communication ends IO10_PIN43, IO10_PIN41, PIN59_TX_EN is answered to connect, high-frequency amplifying unit 15 includes：
Resistance R10, resistance R11, resistance R12, resistance R13, electric capacity C3, electric capacity C4, electric capacity C5, electric capacity C14, electric capacity C15,
Electric capacity C17, electric capacity C20, electric capacity C21, electric capacity C22, electric capacity C26, electric capacity C30, inductance L2, inductance L3, inductance L5, inductance L7 and
High-frequency amplifier U5；
Electric capacity C21 one end is the input of high-frequency amplifying unit 15, the electric capacity C21 other end and electric capacity C22 one end
Connection, the electric capacity C22 other end is connected with high-frequency amplifier U5 rf inputs RFin, and high-frequency amplifier U5 power end leads to
Cross electric capacity C17 ground connection, the one end of high-frequency amplifier U5 power end also with inductance L2 be connected, the inductance L2 other end and meanwhile with electricity
Hold one end connection of C3 one end, electric capacity C4 one end and electric capacity C5, the electric capacity C3 other end, electric capacity the C4 other end and electric capacity
The C5 other end is grounded simultaneously, and the inductance L2 other end is also connected with supply voltage VCC_PA, electric capacity C5 one end also with inductance L3
One end connection, the inductance L3 other end is connected with high-frequency amplifier U5 RF output end RFOUT, and high-frequency amplifier U5's penetrates
Frequency output end RFOUT is also connected with electric capacity C14 one end and inductance L5 one end simultaneously, electric capacity C14 other end ground connection, inductance
The L5 other end is grounded by electric capacity C15, and the one end of the inductance L5 other end also with electric capacity C20 is connected, the electric capacity C20 other end
For the output end of high-frequency amplifying unit 15, high-frequency amplifier U5 biased electrical source VCC_bias one end simultaneously with resistance R12,
Resistance R13 one end and electric capacity C30 one end connection, electric capacity C30 other end ground connection, resistance the R12 other end, resistance R13
The other end be respectively the first communication ends of high-frequency amplifying unit 15, the second communication ends, high-frequency amplifier U5 first voltage base
Quasi- end VB1 is connected with resistance R11 one end, and high-frequency amplifier U5 second voltage reference edge VB2 and resistance R10 one end connect
Connect, the resistance R10 other end and the resistance R11 other end are grounded by electric capacity C26, the resistance R10 other end also with inductance
L7 one end connection, the inductance L7 other end is the third communication end of high-frequency amplifying unit 15.
The utility model embodiment is after current transmitting antenna is by environmental disturbances, and switching starts another antenna and sent out
Penetrate, effectively prevent environment interference, improve the reliability of high frequency transmission signal, be optimal transmitting.
The another object of the utility model embodiment is to include the height of above-mentioned anti-interference high frequency transmission circuit there is provided a kind of
Take place frequently the audio frequency apparatus penetrated.
Preferred embodiment of the present utility model is these are only, it is all in this practicality not to limit the utility model
Any modifications, equivalent substitutions and improvements made within new spirit and principle etc., should be included in guarantor of the present utility model
Within the scope of shield.
Claims (8)
1. a kind of anti-interference high frequency transmission circuit, it is characterised in that the circuit includes：
High-frequency emission communication unit, first antenna, the second antenna；And
Switch the switch unit of startup between first antenna and the second antenna when by external interference, the switch unit
Input is connected with the output end of the high-frequency emission communication unit；
The first matching unit matched to first antenna, input and the switch unit of first matching unit
First output end is connected, and the output end of first matching unit is connected with a connection end of the first antenna, and described first
Another connection end ground connection of antenna；
The high-frequency amplifying unit that the high-frequency signal that the high-frequency emission communication unit is exported is amplified, the High frequency amplification list
The input of member is connected with the second output end of the switch unit, and the communication ends of the high-frequency amplifying unit take place frequently with the height
Penetrate the communication ends connection of communication unit；
Bandpass filter, the input of the bandpass filter is connected with the output end of the high-frequency amplifying unit；
The second matching unit matched to the second antenna, input and the bandpass filter of second matching unit
Output end connection, the output end of second matching unit is connected with a connection end of second antenna, described second day
Another connection end ground connection of line.
2. circuit as claimed in claim 1, it is characterised in that the switch unit is UPG2179TB type analog switches.
3. circuit as claimed in claim 1, it is characterised in that the first antenna is inverted F shaped antenna, second antenna is
Unipole antenna.
4. circuit as claimed in claim 1, it is characterised in that first matching unit includes：
Electric capacity C6, electric capacity C16 and inductance L1；
One end of the inductance L1 is grounded for the input of first matching unit by the electric capacity C16, the inductance L1
The other end be grounded for the output end of first matching unit by the electric capacity C6.
5. circuit as claimed in claim 1, it is characterised in that the communication ends of the high-frequency amplifying unit include the first communication
End, the second communication ends and third communication end, the high-frequency amplifying unit include：
Resistance R10, resistance R11, resistance R12, resistance R13, electric capacity C3, electric capacity C4, electric capacity C5, electric capacity C14, electric capacity C15, electric capacity
C17, electric capacity C20, electric capacity C21, electric capacity C22, electric capacity C26, electric capacity C30, inductance L2, inductance L3, inductance L5, inductance L7 and high frequency
Amplifier；
One end of the electric capacity C21 is the input of the high-frequency amplifying unit, the other end and the electric capacity of the electric capacity C21
C22 one end connection, the other end of the electric capacity C22 is connected with the rf inputs of the high-frequency amplifier, and the high frequency is put
The power end of big device be grounded by the electric capacity C17, one end company of the power end of the high-frequency amplifier also with the inductance L2
Connect, the other end of the inductance L2 simultaneously with one end, one end of the electric capacity C4 and the electric capacity C5 of the electric capacity C3 one
End connection, the other end of the other end of the electric capacity C3, the other end of the electric capacity C4 and the electric capacity C5 is grounded simultaneously, described
The inductance L2 other end is also connected with supply voltage, and the one end of one end of the electric capacity C5 also with the inductance L3 is connected, the electricity
The sense L3 other end is connected with the RF output end of the high-frequency amplifier, and the RF output end of the high-frequency amplifier is also simultaneously
It is connected with one end of the electric capacity C14 and one end of the inductance L5, the other end ground connection of the electric capacity C14, the inductance L5
The other end be grounded by the electric capacity C15, the one end of the other end of the inductance L5 also with the electric capacity C20 is connected, described
The electric capacity C20 other end is the output end of the high-frequency amplifying unit, the biased electrical source of the high-frequency amplifier simultaneously with institute
State one end connection of resistance R12 one end, one end of the resistance R13 and the electric capacity C30, the other end of the electric capacity C30
Ground connection, the other end of the resistance R12, the other end of the resistance R13 are respectively the first communication of the high-frequency amplifying unit
End, the second communication ends, the first reference edge of the high-frequency amplifier are connected with one end of the resistance R11, the High frequency amplification
Second reference edge of device is connected with one end of the resistance R10, and the other end of the resistance R10 and the resistance R11's is another
End is grounded by the electric capacity C26, and the one end of the other end of the resistance R10 also with the inductance L7 is connected, the inductance
The L7 other end is the third communication end of the high-frequency amplifying unit.
6. circuit as claimed in claim 1, it is characterised in that the bandpass filter is ACX/BF2520-B2R4CAA type bands
Bandpass filter.
7. circuit as claimed in claim 1, it is characterised in that second matching unit includes：
Resistance R9 and electric capacity C24；
One end of the resistance R9 is grounded for the input of second matching unit by the electric capacity C24, the resistance R9
The other end be second matching unit output end.
8. a kind of audio frequency apparatus of high-frequency emission, it is characterised in that the audio frequency apparatus is included such as any one of claim 1-7 institutes
The anti-interference high frequency transmission circuit stated.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621176730.8U CN206402205U (en) | 2016-11-01 | 2016-11-01 | A kind of audio frequency apparatus of anti-interference high frequency transmission circuit and high-frequency emission |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621176730.8U CN206402205U (en) | 2016-11-01 | 2016-11-01 | A kind of audio frequency apparatus of anti-interference high frequency transmission circuit and high-frequency emission |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206402205U true CN206402205U (en) | 2017-08-11 |
Family
ID=59507077
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621176730.8U Active CN206402205U (en) | 2016-11-01 | 2016-11-01 | A kind of audio frequency apparatus of anti-interference high frequency transmission circuit and high-frequency emission |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206402205U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107645346A (en) * | 2017-09-19 | 2018-01-30 | 北京小米移动软件有限公司 | Antenna and antenna debugging method |
| CN109802693A (en) * | 2019-03-28 | 2019-05-24 | 联想(北京)有限公司 | Electronic equipment and radiofrequency signal receiving/transmission method |
-
2016
- 2016-11-01 CN CN201621176730.8U patent/CN206402205U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107645346A (en) * | 2017-09-19 | 2018-01-30 | 北京小米移动软件有限公司 | Antenna and antenna debugging method |
| CN109802693A (en) * | 2019-03-28 | 2019-05-24 | 联想(北京)有限公司 | Electronic equipment and radiofrequency signal receiving/transmission method |
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