CN106788474A - Switch the device of receiving and transmitting signal path - Google Patents
Switch the device of receiving and transmitting signal path Download PDFInfo
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- CN106788474A CN106788474A CN201611122437.8A CN201611122437A CN106788474A CN 106788474 A CN106788474 A CN 106788474A CN 201611122437 A CN201611122437 A CN 201611122437A CN 106788474 A CN106788474 A CN 106788474A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/005—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission adapting radio receivers, transmitters andtransceivers for operation on two or more bands, i.e. frequency ranges
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/38—Transceivers, i.e. devices in which transmitter and receiver form a structural unit and in which at least one part is used for functions of transmitting and receiving
- H04B1/40—Circuits
- H04B1/50—Circuits using different frequencies for the two directions of communication
- H04B1/52—Hybrid arrangements, i.e. arrangements for transition from single-path two-direction transmission to single-direction transmission on each of two paths or vice versa
- H04B1/525—Hybrid arrangements, i.e. arrangements for transition from single-path two-direction transmission to single-direction transmission on each of two paths or vice versa with means for reducing leakage of transmitter signal into the receiver
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- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Transceivers (AREA)
Abstract
The present invention relates to a kind of device for switching receiving and transmitting signal path, described device includes：Radio frequency path, control access and detection circuit；The radio frequency path includes the first channel switching unit, second channel switch unit and protection location；Whether first channel switching unit, the connection for the transmission signal path to transmitting equipment to antenna switches over；Whether the second channel switch unit, the connection for the reception signal path to antenna to receiving device switches over；The control access, the switching for controlling the first channel switching unit and second channel switch unit according to the signal magnitude of the antenna, it is ensured that transmission signal path is connected with only one of which path in reception signal path.The switching of the first channel switching unit and second channel switch unit is controlled by control access, only one of which path is connected in ensuring transmission signal path and receiving signal path, reception and demodulation that transmission signal interference receives signal can be prevented effectively from, antijamming capability is improved.
Description
Technical field
The present invention relates to signal control field, more particularly to a kind of device for switching receiving and transmitting signal path.
Background technology
With continuing to develop for telecommunications, the requirement more and more higher of communication efficiency and quality to short wave communication；To short
The pattern of wave communication is more and more diversified with function.Present short wave communication has been not only that simple message transmissions are talked about with simulation
Communication.It is logical that the thing followed is Short-wave Hopping Communication, adaptive communications, automatically control communication, diversity reception, frequency-selecting are received etc.
Letter mode.Therefore, also increasingly stricter to the performance indications of short-wave radio set and the requirement of the design of novelty, a performance is good
Good radio station connects the receiving front-end of antenna and the signal transacting of transmitting rear end in addition to possessing itself good transmitting-receiving performance
It is important to what is closed.However, traditional short-wave radio set in a half-duplex mode receiving terminal usually because transmitting-receiving jet device between isolation
Spend relatively low and reception and demodulation that transmission signal interference receives signal occur.
The content of the invention
Based on this, in order to improve the noise immunity between receiving and transmitting signal, there is provided a kind of dress of switching receiving and transmitting signal path
Put.
A kind of device for switching receiving and transmitting signal path, including：Radio frequency path, control access and detection circuit；The radio frequency
Path includes the first channel switching unit, second channel switch unit and protection location；First channel switching unit, is used for
Whether connection to the transmission signal path of transmitting equipment to antenna switches over；The second channel switch unit, for right
Whether the connection of antenna to the reception signal path of receiving device switches over；The protection location switches with the second channel
Unit is connected, for protecting receiving device；The detection circuit, for detecting the signal magnitude that the antenna is received, and will
The signal magnitude for detecting is sent to the control access；The control access, for the signal magnitude control according to the antenna
Make the switching of the first channel switching unit and second channel switch unit, it is ensured that in transmission signal path and reception signal path only
There is a path to connect.
The beneficial effect of this programme：The first channel switching unit in the radio frequency path is to launching equipment to the hair of antenna
Whether the connection for penetrating signal path switches over, and the second channel switch unit in the radio frequency path is to antenna to receiving device
The connection of reception signal path whether switch over；The first channel switching unit and second channel is controlled to cut by control access
Change the switching of unit, it is ensured that transmission signal path is connected with only one of which path in reception signal path, can be prevented effectively from hair
Reception and demodulation that signal interference receives signal are penetrated, antijamming capability is improved.
Brief description of the drawings
Fig. 1 is the schematic diagram of the device of the switching receiving and transmitting signal path of an embodiment；
Fig. 2 is the schematic diagram of the protection circuit of an embodiment；
Fig. 3 is the circuit diagram of the radio frequency path of an embodiment；
Fig. 4 is the circuit diagram of the control access of an embodiment；
Fig. 5 is the circuit diagram of the detection path of an embodiment.
Specific embodiment
In order to further illustrate the effect of the technological means taken of the invention and acquirement, below in conjunction with the accompanying drawings and preferably
Embodiment, to technical scheme, carries out clear and complete description.
Fig. 1 is the schematic diagram of the device of the switching receiving and transmitting signal path of an embodiment；As shown in figure 1, one kind is cut
The device of receiving and transmitting signal path is changed, including：Radio frequency path, control access and detection circuit；The radio frequency path includes the first letter
Road switch unit, second channel switch unit and protection location；First channel switching unit, for transmitting equipment to day
Whether the connection of the transmission signal path of line switches over；The second channel switch unit, for antenna to receiving device
The connection of reception signal path whether switch over；The protection location is connected with the second channel switch unit, is used for
Protection receiving device；The detection circuit, for detecting the signal magnitude that the antenna is received, and the signal that will be detected is big
It is small to be sent to the control access；The control access, for controlling the switching of the first channel according to the signal magnitude of the antenna
The switching of unit and second channel switch unit, it is ensured that only one of which path connects in transmission signal path and reception signal path
It is logical.
Used as a preferred embodiment, the first channel switching unit includes that the first relay, second channel switch unit include
Second relay；First channel switching unit is by first relay to transmitting equipment to the transmission signal path of antenna
Whether connect and switch over；Reception of the second channel switch unit by second relay to receiving device interface to antenna
Whether the connection of signal path switches over.So as to realize that transmitting equipment transmitting path shares one with receiving device receiving path
Antenna.Original state is that transmitting equipment is connected to the transmission signal path of antenna, i.e., antenna acquiescence accesses radio station transmitting terminal and is used for
Transmitting to signal；When the first relay and the second relay are redirected, i.e. behind the first relay disconnects, the second relay is connected to
Protection circuit, the reception signal path of receiving device interface to antenna connected, and receiving device is received to aerial signal.
Used as a preferred embodiment, Fig. 2 is the schematic diagram of the protection circuit of an embodiment；As shown in Fig. 2 described
Protection circuit includes：Current foldback circuit 101, thunder and lightning and big signal protection circuit 102, clamping protective circuit 103 and trap electricity
At least one in road 104.The secondary signal switch unit and current foldback circuit, the trap circuit are additionally coupled to receive
Equipment interface；The current foldback circuit, for being stopped to the reception signal more than the first predetermined current amplitude；It is described to fall into
Wave circuit, for carrying out attenuation filter to the reception signal more than predeterminated frequency value.The thunder and lightning and big signal protection circuit connect
The secondary signal switch unit is connected to, the current foldback circuit is connected by clamped protection circuit and trap circuit；It is described
Thunder and lightning and big signal protection circuit, for being shunted to the reception signal more than the second predetermined current amplitude, and/or to exceeding
The reception signal of the first predeterminated voltage amplitude carries out partial pressure；The clamping protective circuit, for will be more than the second predeterminated voltage width
The reception signal of degree is clamped under the second predeterminated voltage amplitude.
Used as a preferred embodiment, the control access includes the first triode, the second triode, the 3rd triode and the
Four triodes；When first triode and the second triode are both turned on, the control access output control signal makes first
The common port and normal-closed end of relay disconnect, and the common port of the first relay and normally opened end connect, the hair of transmitting equipment to antenna
Penetrate signal path disconnection；When the 3rd triode and four triode ONs, the control access output control signal makes
The common port of the second relay and normally opened end disconnect, common port and the normal-closed end connection of the second relay, antenna to receiving device
Reception signal path connect.
Used as a preferred embodiment, the detection circuit also includes operational amplifier；The operational amplifier will be received to be believed
Number and default voltage magnitude be compared, and by comparative result output to control access；
Transmitting of the present embodiment by the first channel switching unit in the radio frequency path to transmitting equipment to antenna is believed
Whether the connection of number path switches over, and the second channel switch unit in the radio frequency path connects to antenna to receiving device
Whether the connection for receiving signal path switches over；The first channel switching unit and second channel is controlled to switch by control access single
The switching of unit, it is ensured that transmission signal path is connected with only one of which path in reception signal path, can be prevented effectively from transmitting letter
Number interference receive signal reception with demodulation, improve antijamming capability.
In order to preferably implement the present invention, preferably realize switching of the device to receiving and transmitting signal, with reference to Fig. 3, Fig. 4 and
Fig. 5, and illustrate referring to Figures 1 and 2 in the lump.Fig. 3 is the circuit of an embodiment radio frequency path, and Fig. 4 is the control of an embodiment
The circuit diagram of path processed, Fig. 5 is the circuit diagram of the detection path of an embodiment.
A kind of device for switching receiving and transmitting signal path, including：Radio frequency path, control access and detection circuit；The radio frequency
Path includes the first channel switching unit, second channel switch unit and protection location；First channel switching unit, is used for
Whether connection to the transmission signal path of transmitting equipment to antenna switches over；The second channel switch unit, for right
Whether the connection of antenna to the reception signal path of receiving device switches over；The protection location switches with the second channel
Unit is connected, for protecting receiving device；The detection circuit, for detecting the signal magnitude that the antenna is received, and will
The signal magnitude for detecting is sent to the control access；The control access, for the signal magnitude control according to the antenna
Make the switching of the first channel switching unit and second channel switch unit, it is ensured that in transmission signal path and reception signal path only
There is a path to connect.
Used as a preferred embodiment, the first channel switching unit includes the first relay K1, second channel switch unit bag
Include the second relay K2；First channel switching unit is by the first relay K1 to launching equipment to the transmission signal of antenna
Whether the connection of path switches over；Second channel switch unit is by the second relay K2 to receiving device interface to day
Whether the connection of the reception signal path of line switches over.First channel switching unit also includes the first electric capacity C1, second channel
Switch unit also includes the second electric capacity C2；Second coil-end of the first relay K1 is also grounded by the first electric capacity C1, institute
State the state end connection of the first coil end STATION and control access of the first relay K1；The of the second relay K2
Two coil end is also grounded by the second electric capacity C2, the first coil end RECEIVE of the second relay K2 and control access
Receiving terminal is connected.
Used as a preferred embodiment, the protection circuit includes：Current foldback circuit 101 and trap circuit 104；Described
Binary signal switch unit passes sequentially through the current foldback circuit 101, the reception of the connection described device of the trap circuit 104 and sets
Standby interface；The current foldback circuit 101, for being stopped to the reception signal more than the first predetermined current amplitude；It is described
Trap circuit 104, for carrying out attenuation filter to the reception signal more than predeterminated frequency value.The protection circuit includes：Thunder and lightning
And big signal protection circuit 102 and clamping protective circuit；The thunder and lightning and big signal protection circuit 102 are connected to second letter
Number switch unit, the current foldback circuit 101 is connected by clamped protection circuit 103 and trap circuit 104；The thunder and lightning with
Big signal protection circuit, for being shunted to the reception signal more than the second predetermined current amplitude, and/or to pre- more than first
If the reception signal of voltage magnitude carries out partial pressure；The clamping protective circuit, for by connecing more than the second predeterminated voltage amplitude
The collection of letters number is clamped under the second predeterminated voltage amplitude.
Used as a preferred embodiment, thunder and lightning and big signal protection circuit 102 include the first protection pipe F1, current foldback circuit
101 include the second protection pipe F2 and the 3rd protection pipe F3, clamping protective circuit include the first diode V1, the second diode V2,
3rd electric capacity C3 and first resistor R1, trap circuit 104 includes trapper T1；Common port, second of the first relay K1
One end of the common port of relay K2 and the first protection pipe F1 are connected to antennal interface, and the normally opened end of the first relay K1 connects
Transmitting equipment interface is connected to, the normal-closed end of the first relay K1 is hanging, the first coil end of the first relay K1
The state end STATION connections of STATION and control access, second coil-end of the first relay K1 is also and control access
Power end VCC connection, the first protection pipe F1 the other end ground connection；The normally opened end of the second relay K2 is hanging, institute
State the normal-closed end of the second relay K2 and one end of the second protection pipe F2, one end of the 3rd protection pipe F3 connect respectively, described
The receiving terminal RECEIVE connections at the first coil end and control access of two relay K2, second line of the second relay K2
Circle end also connects with the power end VCC of control access；The other end of the second protection pipe F2 and the 3rd protection pipe F3's is another
End connection, negative electrode, anode, the 3rd of the second diode V2 of the other end of the second protection pipe F2 also with the first diode V1
One end connection of electric capacity C3, the plus earth of the first diode V1, the minus earth of the second diode V2, first electricity
Hold the other end of C1 and one end of first resistor R1, the input of trapper T1 are connected respectively, the first resistor R1's is another
End ground connection, the output end of the trapper T1 is connected to receiving device interface, first earth terminal and second of the trapper T1
Earth terminal is grounded.
Used as a preferred embodiment, the first channel switching unit is by the first relay K1 to transmitting equipment to antenna
The connection of transmission signal path whether switch over；Second channel switch unit is set by the second relay K2 to reception
Whether the connection of standby interface to the reception signal path of antenna switches over.So as to realize that transmitting equipment transmitting path and reception set
Standby receiving path shares a strip antenna.Original state is that transmitting equipment is connected to the transmission signal path of antenna, i.e. antenna acquiescence
Radio station transmitting terminal is accessed for the transmitting to signal；When the first relay K1 and the second relay K2 are redirected, the second relay K2
It is connected to protection circuit below, i.e. receiving device interface to be connected to the reception signal path of antenna, receiving device is to aerial signal
Received.Overcurrent protection Guan Weike restoring current path protection devices in receiving path.When high current passes through receiving path
When, the second protection pipe F2 and the 3rd protection pipe F3 the fusing cut-out receiving path in current foldback circuit 101 treat that electric current is reduced to
Overcurrent protection pipe can return to normal operating conditions during certain value；The first diode V1 and the two or two pole in clamping protective circuit
Pipe V2 is voltage-regulator diode, can limit the signal magnitude in receiving path, when input signals are large can be by the letter on path
Number it is clamped to predetermined amplitude size；3rd electric capacity C3 is used to block the dc source on path；Trapper T1 is used for logical to radio frequency
Signal limiter on road more than 33dB.
Used as a preferred embodiment, the control access includes the first triode Q1, the second triode Q2, the 3rd triode
Q3 and the 4th triode Q4；The grid of the first triode Q1 and the 3rd triode Q3 is connected to the NWSC controls of control interface
Signal end (the first control signal end) processed, the source electrode of the first triode Q1 and the first relay K1's of the radio frequency path
First coil end STATION is connected, and the drain electrode of the first triode Q1 and the source electrode of the second triode Q2 are connected；Described 3rd
The first coil end RECEIVE connections of the second relay K2 of the source electrode of triode Q3 and the radio frequency path, the described 3rd 3
The drain electrode of pole pipe Q3 and the source electrode of the 4th triode Q4 are connected；The grid of the second triode Q2 is connected to the STXZ controls of control interface
Signal end (the second control signal end) processed, the drain electrode ground of the second triode Q2；The grid of the 4th triode Q4 and institute
State the Detect detection signals end connection of detection circuit, the grounded drain of the 4th triode Q4；When first triode
When Q1 and the second triode Q2 are both turned on, the control access output control signal makes the common port of the first relay K1 and normally closed
End disconnects, and the common port of the first relay K1 and normally opened end connect, and the transmission signal path of transmitting equipment to antenna disconnects；Work as institute
When stating the 3rd triode Q3 and the 4th triode Q4 conductings, the control access output control signal makes the public affairs of the second relay K2
End and normally opened end disconnect altogether, and common port and the normal-closed end connection of the second relay K2, the reception signal of antenna to receiving device lead to
Road is connected.
Used as a preferred embodiment, the control access also includes the 4th electric capacity C4, inductance L1, second resistance R2, the 3rd
Resistance R3, the 4th resistance R4, the 5th resistance R5, the 6th resistance R6, the 7th resistance R7 and the 8th resistance R8；The one of the inductance L1
End, one end of the 4th electric capacity C4 are connected to the power end VCC of control interface, the other end and the first relay of the inductance L1
The second coil-end connection of K1, the other end ground connection of the 4th electric capacity C4；One end of the second resistance R2 is connected to control
First control signal end of interface, the other end ground connection of the second resistance R2, the source electrode of the first triode Q1 is by the
The first coil end STATION connections of the first relay K1 of four resistance R4 and the radio frequency path, the first triode Q1
Drain electrode and the second triode Q2 source electrode connect；The source electrode of the 3rd triode Q3 passes through the 7th resistance R7 and the radio frequency
The first coil end connection of the second relay K2 of path, the drain electrode of the 3rd triode Q3 and the source electrode of the 4th triode Q4
Connection；The grid of the 4th triode Q4 is connected by the Detect detection signals end of the 6th resistance R6 and the detection circuit
Connect, the drain electrode of the 4th triode Q4 is grounded by the 8th resistance R8；One end of the 3rd resistor R3 is connected to control and connects
Second control signal end of mouth, the other end ground connection of the 3rd resistor R3, the drain electrode of the second triode Q2 passes through the 5th
Resistance R5 is grounded；The earth terminal ground connection of control interface.
Used as a preferred embodiment, inductance L1 and the 4th electric capacity C4 is used for the power supply filter accessed to the power end of control interface
Ripple, the first triode Q1, the second triode Q2, the 3rd triode Q3, the 4th triode Q4 and its peripheral circuit are used to realize controlling
The state end STATION of path processed and the break-make of receiving terminal RECEIVE signals.The STXZ control signal ends of control interface, NWSC
Control signal end controls the first triode Q1, the second triode Q2, the 3rd triode Q3 with the signal at Detect detection signals end
With cut-offfing for the 4th triode Q4, so as to cause the state end STATION of control access logical with receiving terminal RECEIVE signals
It is disconnected, and then realize that the first relay K1, the second relay K2 are redirected, the switching of transmitting path and receiving path.When described
When one triode Q1 and the second triode Q2 are both turned on, the state end STATION signals of the control access make for low level
The common port and normal-closed end of one relay K1 disconnect, and the common port of the first relay K1 and normally opened end connect, transmitting equipment to day
The transmission signal path of line disconnects；When the 3rd triode Q3 and the 4th triode Q4 are turned on, the control access connects
Receiving end RECEIVE signals disconnect the common port of the second relay K2 and normally opened end for low level, and the second relay K2's is public
End and normal-closed end connection, the reception signal path of antenna to receiving device are connected.
The STXZ control signal ends of control interface, NWSC control signal ends and Detect detection signals end signal work true value
Table is shown in Table one：
The control signal of table one work truth table
Can find that signal can just switch to receiving path only under 011 and 111 states by truth table, under 011 state
Radio frequency path is full duplex mode of operation and antenna receiving and transmitting signal simultaneously, wherein, full duplex mode of operation refers to can (wink simultaneously
When) transmitted in both directions of signal is carried out, it is temporal synchronization；110 states are antenna off-state；Remaining state is emitting shape
State.
Used as a preferred embodiment, the detection circuit also includes operational amplifier；The operational amplifier will be received to be believed
Number and default voltage magnitude be compared, and by comparative result output to control access；The operational amplifier it is reverse defeated
Enter end and antennal interface connection, the power end VCC connections of the input in the same direction and control access of the operational amplifier, the fortune
The output end for calculating amplifier is connected by the grid of the 6th resistance R6 and the 4th triode Q4.
Used as a preferred embodiment, the detection circuit also includes the 9th resistance R9, the tenth resistance R10, the 11st resistance
R11, the 12nd resistance R12, the 13rd resistance R13, the 5th electric capacity C5, the 6th electric capacity C6, the 7th electric capacity C7, the 8th electric capacity C8,
3rd diode V3, the 4th diode V4 and the 5th diode V5；One end, one end of the 5th electric capacity C5 of the 9th resistance R9
It is connected to antennal interface, the other end connection of the other end and the 5th electric capacity C5 of the 9th resistance R9, the 9th resistance
One end, one end of sixth electric capacity C6, the anode of threeth diode V3, four two pole of the other end of R9 also with the tenth resistance R10
The negative electrode connection of pipe V4, the negative electrode of the 3rd diode V3 and one end of the 7th electric capacity C7, one end of the 11st resistance R11,
The reverse input end of operational amplifier is connected respectively, the input in the same direction of the operational amplifier and the one of the 12nd resistance R12
End, the negative electrode connection of the 5th diode V5, one end, the other end, the operation amplifier of the 12nd resistance R12 of the 8th electric capacity C8
The positive power source terminal of device, one end of the 13rd resistance R13 are connected to the other end of the first electric capacity C1, the 13rd resistance
The other end of R13 is connected by the grid of the 6th resistance R6 and the 4th triode Q4, and the tenth resistance R10's is another
End, the other end of the 6th resistance R6, the anode of the 4th diode V4, the other end of the 7th electric capacity C7, the 8th electric capacity C8 it is another
End, the other end of the 11st resistance R11, the anode of the 5th diode V5, the negative power end of operational amplifier are grounded.
Used as a preferred embodiment, detection circuit is acquired by antennal interface signal, using second resistance R2 with
4th resistance R4 carries out partial pressure decay to collection signal, and the 7th electric capacity C7, the 8th electric capacity C8 are used to filter garbage signal；Circuit makes
Be powered to operational amplifier with 5V voltages, operational amplifier as comparator, the operational amplifier will gather signal and
Default voltage magnitude is compared, and comparative result output is arrived into control access；5th diode is voltage-regulator diode, positive level
Voltage is steady in 2.7V by the 5th diode, and when the negative step voltage less than 2.7V passes through five diodes, output electricity frequency high, high
Low electricity frequency is exported when 2.7V, the 3rd diode V3, the 4th diode V4 are used as detection tube, and the big I of AC signal passes through
The DC voltage supply late-class circuit that the pipe becomes corresponding amplitude is used.
Control access in the present embodiment controls the first channel switching unit and second channel switch unit by triode
Switching, it is ensured that transmission signal path with receive signal path in only one of which path connect, transmission signal can be prevented effectively from
Interference receives the reception and demodulation of signal, improves antijamming capability, it is ensured that receiving device shares a strip antenna with transmitting equipment
Possesses good transmitting-receiving performance during work.Radio frequency path is provided with protection circuit, and attenuation filter etc. is carried out to overcurrent-overvoltage signal
Treatment, effectively prevent larger thunder and lightning signal and transmission signal receiving device is impacted with damage, from after without damage
Level circuit, reception and the demodulation for not influenceing receiving device.
Each technical characteristic of embodiment described above can be combined arbitrarily, to make description succinct, not to above-mentioned reality
Apply all possible combination of each technical characteristic in example to be all described, as long as however, the combination of these technical characteristics is not deposited
In contradiction, the scope of this specification record is all considered to be.
Embodiment described above only expresses several embodiments of the invention, and its description is more specific and detailed, but simultaneously
Can not therefore be construed as limiting the scope of the patent.It should be pointed out that coming for one of ordinary skill in the art
Say, without departing from the inventive concept of the premise, various modifications and improvements can be made, these belong to protection of the invention
Scope.Therefore, the protection domain of patent of the present invention should be determined by the appended claims.
Claims (10)
1. it is a kind of switch receiving and transmitting signal path device, it is characterised in that including：Radio frequency path, control access and detection circuit；
The radio frequency path includes the first channel switching unit, second channel switch unit and protection location；
Whether first channel switching unit, the connection for the transmission signal path to transmitting equipment to antenna cuts
Change；Whether the second channel switch unit, the connection for the reception signal path to the antenna to receiving device is carried out
Switching；The protection location is connected with the second channel switch unit, for protecting receiving device；
The detection circuit, for detecting the signal magnitude that the antenna is received, and the signal magnitude that will be detected is sent to
The control access；The control access, for controlling the first channel switching unit and the according to the signal magnitude of the antenna
The switching of two channel switching units, it is ensured that transmission signal path is connected with only one of which path in reception signal path.
2. it is according to claim 1 switching receiving and transmitting signal path device, it is characterised in that the first channel switching unit bag
The first relay is included, second channel switch unit includes the second relay；
First channel switching unit by first relay to transmitting equipment to the transmission signal path of antenna connection and
It is no to switch over；Second channel switch unit is led to by second relay to the reception signal of the antenna to receiving device
Whether the connection on road switches over.
3. it is according to claim 2 switching receiving and transmitting signal path device, it is characterised in that the first channel switching unit is also
Including the first electric capacity, second channel switch unit also includes the second electric capacity；
Second coil-end of first relay passes through the first capacity earth, the first coil end of first relay and control
The state end connection of path processed；Second coil-end of second relay is by the second capacity earth, second relay
First coil end and control access receiving terminal connection.
4. it is according to claim 3 switching receiving and transmitting signal path device, it is characterised in that the protection circuit includes：
Current foldback circuit and trap circuit；
The secondary signal switch unit passes sequentially through the current foldback circuit, the trap circuit and connects connecing for described device
Receiving unit interface；
The current foldback circuit, for being stopped to the reception signal more than the first predetermined current amplitude；The trap electricity
Road, for carrying out attenuation filter to the reception signal more than predeterminated frequency value.
5. it is according to claim 4 switching receiving and transmitting signal path device, it is characterised in that the protection circuit is also wrapped
Include：Thunder and lightning and big signal protection circuit and clamping protective circuit；
The secondary signal switch unit is also connected with the thunder and lightning and big signal protection circuit, and the current foldback circuit passes through
The clamped protection circuit and trap circuit are connected；
The thunder and lightning and big signal protection circuit, for being shunted to the reception signal more than the second predetermined current amplitude, and/
Or partial pressure is carried out to the reception signal more than the first predeterminated voltage amplitude；The clamping protective circuit, for will be pre- more than second
If the reception signal of voltage amplitude is clamped under the second predeterminated voltage amplitude.
6. it is according to claim 5 switching receiving and transmitting signal path device, it is characterised in that thunder and lightning and big signal protection electricity
Road includes the first protection pipe, and current foldback circuit includes the second protection pipe and the 3rd protection pipe, and clamping protective circuit includes first
Diode, the second diode, the 3rd electric capacity and first resistor, trap circuit include trapper；
One end of the common port, the common port of the second relay and the first protection pipe of first relay is connected to antenna and connects
Mouthful, the normally opened end of first relay is connected to transmitting equipment interface, and the normal-closed end of first relay is hanging, and described the
The state end connection of the first coil end of one relay and control access, the second coil-end of first relay is also and control
The power end connection of path, the other end ground connection of first protection pipe；The normally opened end of second relay is hanging, and described the
One end of the normal-closed end of two relays and the second protection pipe, one end of the 3rd protection pipe connect respectively, second relay
The receiving terminal connection of first coil end and control access, the second coil-end of second relay also with the power supply of control access
End connection；The other end connection of the other end and the 3rd protection pipe of second protection pipe, the other end of second protection pipe
One end connection of negative electrode, the anode of the second diode, the 3rd electric capacity also with the first diode, the anode of first diode
Ground connection, the minus earth of the second diode, the other end of first electric capacity and one end of first resistor, the input of trap electrical equipment
End connects respectively, and the other end ground connection of the first resistor, the output end of the trap electrical equipment is connected to receiving device interface, institute
The first earth terminal and the second earth terminal for stating trap electrical equipment are grounded.
7. the device of switching receiving and transmitting signal path according to claim 6, it is characterised in that the control access includes the
One triode, the second triode, the 3rd triode and the 4th triode；
The grid of first triode and the 3rd triode is connected to the first control signal end of control interface, described first
First relay of the source electrode of triode and the radio frequency path first coil end connection, the drain electrode of first triode and
The source electrode connection of the second triode；The first coil of the source electrode of the 3rd triode and the second relay of the radio frequency path
End connection, the drain electrode of the 3rd triode and the source electrode of the 4th diode are connected；The grid of the second triode is connected to control
Second control signal end of interface, the drain electrode ground of second triode；The grid of the 4th triode and detection electricity
The test side connection on road, the grounded drain of the 4th diode；
When first triode and the second triode are both turned on, the control access output control signal makes the first relay
Common port and normal-closed end disconnect, the common port of the first relay and normally opened end connect, the transmission signal of transmitting equipment to antenna
Path disconnects；
When the 3rd triode and four triode ONs, the control signal of the control access output makes the second relay
Common port and normally opened end disconnect, the connection of the common port and normal-closed end of the second relay, the reception signal of antenna to receiving device
Path is connected.
8. it is according to claim 7 switching receiving and transmitting signal path device, it is characterised in that the control access also includes
4th electric capacity, inductance, second resistance, 3rd resistor, the 4th resistance, the 5th resistance, the 6th resistance, the 7th resistance and the 8th electricity
Resistance；
One end of the inductance, one end of the 4th electric capacity are connected to the power end of control interface, the other end of the inductance and
The second coil-end connection of the first relay, the other end ground connection of the 4th electric capacity；One end of the second resistance is connected to
First control signal end of control interface, the other end ground connection of the second resistance, the source electrode of first triode is by the
The first coil end connection of the first relay of four resistance and the radio frequency path, the drain electrode and the two or three of first triode
The source electrode connection of pole pipe；The of the second relay that the source electrode of the 3rd triode passes through the 7th resistance and the radio frequency path
One coil-end is connected, and the drain electrode of the 3rd triode and the source electrode of the 4th triode are connected；The grid of the 4th triode
Connected by the test side of the 6th resistance and the detection circuit, the drain electrode of the 4th triode passes through the 8th resistance eutral grounding；
One end of the 3rd resistor is connected to the second control signal end of control interface, the other end ground connection of the 3rd resistor, institute
The drain electrode for stating the second triode passes through the 5th resistance eutral grounding；The earth terminal ground connection of control interface.
9. it is according to claim 8 switching receiving and transmitting signal path device, it is characterised in that the detection circuit include fortune
Calculate amplifier；
The operational amplifier will receive signal and default voltage magnitude is compared, and comparative result output is logical to control
Road；
The antennal interface connection of the reverse input end of the operational amplifier and described device, the operational amplifier it is in the same direction defeated
The power end for entering end and control access is connected, and the output end of the operational amplifier passes through the 6th resistance and the 4th triode
Grid connection.
10. it is according to claim 9 switching receiving and transmitting signal path device, it is characterised in that the detection circuit is also wrapped
Include the 9th resistance, the tenth resistance, the 11st resistance, the 12nd resistance, the 13rd resistance, the 5th electric capacity, the 6th electric capacity, the 7th electricity
Appearance, the 8th electric capacity, the 3rd diode, the 4th diode and the 5th diode；
One end of 9th resistance, one end of the 5th electric capacity are connected to antennal interface, the other end of the 9th resistance and
The other end connection of the 5th electric capacity, one end also with the tenth resistance of the other end of the 9th resistance, one end of the 6th electric capacity, the
The negative electrode connection of the anode of three diodes, the 4th diode, the negative electrode of the 3rd diode and one end, the tenth of the 7th electric capacity
One end of one resistance, the reverse input end of operational amplifier are connected respectively, the input in the same direction of the operational amplifier and the tenth
One end of two resistance, the negative electrode connection of the 5th diode, one end, the other end, the computing of the 12nd resistance of the 8th electric capacity
The positive power source terminal of amplifier, one end of the 13rd resistance are connected to the other end of the first electric capacity, the 13rd resistance
The other end connected by the grid of the 6th resistance and the 4th triode, the other end, the 6th resistance of the tenth resistance
The other end, the anode of the 4th diode, the other end of the 7th electric capacity, the other end of the 8th electric capacity, the 11st resistance it is another
End, the anode of the 5th diode, the negative power end of operational amplifier are grounded.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611122437.8A CN106788474A (en) | 2016-12-08 | 2016-12-08 | Switch the device of receiving and transmitting signal path |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611122437.8A CN106788474A (en) | 2016-12-08 | 2016-12-08 | Switch the device of receiving and transmitting signal path |
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| Publication Number | Publication Date |
|---|---|
| CN106788474A true CN106788474A (en) | 2017-05-31 |
Family
ID=58881627
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201611122437.8A Pending CN106788474A (en) | 2016-12-08 | 2016-12-08 | Switch the device of receiving and transmitting signal path |
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| Country | Link |
|---|---|
| CN (1) | CN106788474A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107947879A (en) * | 2017-11-23 | 2018-04-20 | 中国船舶重工集团公司第七〇九研究所 | Ship communication channel switching device, system and its application method |
| CN111917531A (en) * | 2020-07-28 | 2020-11-10 | 厦门亿联网络技术股份有限公司 | Single-wire bidirectional communication system and communication method thereof |
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| CN1463502A (en) * | 2001-05-25 | 2003-12-24 | 皇家菲利浦电子有限公司 | Transmit/receive switch for RF transceiver |
| CN201131038Y (en) * | 2007-12-11 | 2008-10-08 | 上海西门子移动通信有限公司 | Transmission-receive path automatic switchover apparatus for testing base station system |
| CN203984418U (en) * | 2014-03-04 | 2014-12-03 | 西安科技大学 | A kind of shortwave power amplifier |
| CN205961112U (en) * | 2016-07-18 | 2017-02-15 | 广州海格通信集团股份有限公司 | Channel auto -change over device |
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| CN2143031Y (en) * | 1992-10-22 | 1993-09-29 | 井陉矿务局第一矿 | Frequency-modulating power line carrier |
| CN1463502A (en) * | 2001-05-25 | 2003-12-24 | 皇家菲利浦电子有限公司 | Transmit/receive switch for RF transceiver |
| CN201131038Y (en) * | 2007-12-11 | 2008-10-08 | 上海西门子移动通信有限公司 | Transmission-receive path automatic switchover apparatus for testing base station system |
| CN203984418U (en) * | 2014-03-04 | 2014-12-03 | 西安科技大学 | A kind of shortwave power amplifier |
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| CN107947879A (en) * | 2017-11-23 | 2018-04-20 | 中国船舶重工集团公司第七〇九研究所 | Ship communication channel switching device, system and its application method |
| CN111917531A (en) * | 2020-07-28 | 2020-11-10 | 厦门亿联网络技术股份有限公司 | Single-wire bidirectional communication system and communication method thereof |
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