CN207368233U - A kind of signal isolator and radar detection front end - Google Patents
A kind of signal isolator and radar detection front end Download PDFInfo
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- CN207368233U CN207368233U CN201721087322.XU CN201721087322U CN207368233U CN 207368233 U CN207368233 U CN 207368233U CN 201721087322 U CN201721087322 U CN 201721087322U CN 207368233 U CN207368233 U CN 207368233U
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Abstract
A kind of signal isolator and radar detection front end are the utility model is related to, wherein signal isolator is applied in radar detection front end, and the radar detection front end includes radar emission port, radar receiving port and antenna port, and the signal isolator includes：First coupler, the second coupler, the 3rd coupler, the 4th coupler, the 5th coupler, first resistor, second resistance, 3rd resistor, the 4th resistance and the 5th resistance.By being attached to each electronic device, radar emission port and radar receiving port in can unifying to transmitting-receiving carry out signal isolation, ensure the use of radar detection front end.
Description
Technical field
It the utility model is related to electronic technology field, more particularly to a kind of signal isolator and radar detection front end.
Background technology
As electronic technology constantly develops, the radar exploration technique is constantly applied in daily life, such as：
The monitoring of vehicle lockage, waterlogging monitoring etc., in order to adapt to different environmental demands, existing radar detection front end can use transmitting-receiving
The mode of unification, i.e. radar emission end and radar receiving terminal common antenna carry out the transmission of radar signal and connecing for echo-signal
Receive, since radar emission port is connected with radar receiving port, is easy to cause unnecessary noise and introduces, or even cause radar to connect
Receiving end saturation, and then cause radar detection front end not use.
Utility model content
The utility model embodiment provides a kind of signal isolator and radar detection front end, the thunder in can unifying to transmitting-receiving
Signal isolation is carried out up to emission port and radar receiving port, ensures the use of radar detection front end.
The utility model embodiment first aspect provides a kind of signal isolator, applied in radar detection front end, institute
Stating radar detection front end includes radar emission port, radar receiving port and antenna port, and the signal isolator includes：First
Coupler, the second coupler, the 3rd coupler, the 4th coupler, the 5th coupler, first resistor, second resistance, the 3rd electricity
Resistance, the 4th resistance and the 5th resistance；Wherein,
The first end of first coupler is connected with the radar emission port, the second end of first coupler
It is connected with first resistor, the 3rd end of first coupler is connected with the first end of second coupler, and described
4th end of one coupler is connected with the second end of the 4th coupler；
The first end of second coupler is connected with the 3rd end of first coupler, second coupler
Second end is connected with the second end of the 5th coupler, and the 3rd end of second coupler is connected with second resistance,
4th end of second coupler is connected with the second end of the 3rd coupler；
The first end of 3rd coupler is connected with the 3rd end of the 4th coupler, the 3rd coupler
Second end is connected with the 4th end of second coupler, and the 3rd end of the 3rd coupler is connected with the antenna port
Connect, the 4th end of the 3rd coupler is connected with the 3rd resistor；
The first end of 4th coupler is connected with the first end of the 5th coupler, the 4th coupler
Second end is connected with the 4th end of first coupler, the 3rd end and the 3rd coupler of the 4th coupler
First end is connected, and the 4th end of the 4th coupler is connected with the 4th resistance；
The first end of 5th coupler is connected with the first end of the 4th coupler, the 5th coupler
Second end is connected with the second end of second coupler, and the 3rd end of the 5th coupler is connected with the 5th resistance
Connect, the 4th end of the 5th coupler is connected with the radar receiving port.
The utility model embodiment second aspect provides a kind of radar detection front end, including radar emission port, radar
Receiving port and antenna port, further include：Signal isolator, the signal isolator include：First coupler, the second coupling
Device, the 3rd coupler, the 4th coupler, the 5th coupler, first resistor, second resistance, 3rd resistor, the 4th resistance and the 5th
Resistance；Wherein,
The first end of first coupler is connected with the radar emission port, the second end of first coupler
It is connected with first resistor, the 3rd end of first coupler is connected with the first end of second coupler, and described
4th end of one coupler is connected with the second end of the 4th coupler；
The first end of second coupler is connected with the 3rd end of first coupler, second coupler
Second end is connected with the second end of the 5th coupler, and the 3rd end of second coupler is connected with second resistance,
4th end of second coupler is connected with the second end of the 3rd coupler；
The first end of 3rd coupler is connected with the 3rd end of the 4th coupler, the 3rd coupler
Second end is connected with the 4th end of second coupler, and the 3rd end of the 3rd coupler is connected with the antenna port
Connect, the 4th end of the 3rd coupler is connected with the 3rd resistor；
The first end of 4th coupler is connected with the first end of the 5th coupler, the 4th coupler
Second end is connected with the 4th end of first coupler, the 3rd end and the 3rd coupler of the 4th coupler
First end is connected, and the 4th end of the 4th coupler is connected with the 4th resistance；
The first end of 5th coupler is connected with the first end of the 4th coupler, the 5th coupler
Second end is connected with the second end of second coupler, and the 3rd end of the 5th coupler is connected with the 5th resistance
Connect, the 4th end of the 5th coupler is connected with the radar receiving port.
In the utility model embodiment, by the design of coupler group and resistance, radar emission port is realized to thunder
The process cancelled out each other up to the couple current of receiving port, effectively improves the receipts of radar emission port and radar receiving port
Isolation is sent out, ensure that the use of radar detection front end.
Brief description of the drawings
In order to illustrate the embodiment of the utility model or the technical proposal in the existing technology more clearly, below will be to embodiment
Or attached drawing needed to be used in the description of the prior art is briefly described, it should be apparent that, drawings in the following description are only
It is some embodiments of the utility model, for those of ordinary skill in the art, in the premise not made the creative labor
Under, other attached drawings can also be obtained according to these attached drawings.
Fig. 1 is a kind of structure diagram for radar detection front end that the utility model embodiment provides；
Fig. 2 is a kind of structure diagram for signal isolator that the utility model embodiment provides.
Embodiment
The following is a combination of the drawings in the embodiments of the present utility model, and the technical scheme in the embodiment of the utility model is carried out
Clearly and completely describe, it is clear that the described embodiments are only a part of the embodiments of the utility model, rather than whole
Embodiment.Based on the embodiment in the utility model, those of ordinary skill in the art are without making creative work
All other embodiments obtained, shall fall within the protection scope of the present invention.
The single port radar that the signal isolator that the utility model embodiment provides can be applied to transmitting-receiving unification mode is visited
Survey in front end, the scene isolated to the signal at radar emission end and radar receiving terminal.Below in conjunction with attached drawing 1 to this practicality
The radar detection front end that new embodiment provides describes in detail.
Fig. 1 is referred to, a kind of structure diagram of radar detection front end is provided for the utility model embodiment.Such as Fig. 1
Shown, the radar detection front end 1 of the utility model embodiment can include：Signal isolator 10, radar emission port 20,
Radar receiving port 30 and antenna port 40.
The signal isolator 10 respectively with the radar emission port 20, the radar receiving port 30, the antenna
Port 40 is connected, the signal isolator 10 and the radar emission port 20, the radar receiving port 30, the antenna
The connection relation of port 40 is electrical connection.
The single-ended radar signal at radar emission end is transmitted to the signal isolator 10, institute through the radar emission port 20
Signal isolator 10 is stated by the single-ended Radar Signal Transmission to the antenna port 40, is connected by the antenna port 40
The single-ended radar signal is projected to current target area to be monitored or destination object etc., while the signal isolation by antenna
Device 10 can cause single-ended radar signal to be offset at the radar receiving port 30, avoid the single-ended radar of radar output terminal from believing
Number radar receiving terminal is impacted.
And when antenna receives single-ended echo caused by target area or the destination object reflection single-ended radar signal
During signal, the single-ended echo-signal is transmitted to the signal isolator 10, the signal isolator through the antenna port 40
The single-ended echo-signal is transmitted to the radar receiving port 30 by 10, then is transmitted to radar by the radar receiving port 30
Receiving terminal, meanwhile, the single-ended echo-signal is transmitted to the radar emission port 20 by the signal isolator 10, then by institute
State radar emission port 20 and be transmitted to radar emission end, since the signal strength of single-ended echo-signal is than single-ended radar signal
Signal strength is weak, therefore the single-ended echo-signal that radar emission port 20 receives will not have an impact radar emission end.
Please also refer to Fig. 2, a kind of structure diagram of signal isolator is provided for the utility model embodiment.Such as figure
Shown in 2, the signal isolator 10 shown in the utility model can include：First coupler 101, the second coupler 102, the 3rd coupling
Clutch 103, the 4th coupler 104, the 5th coupler 105, first resistor 106, second resistance 107,3rd resistor the 108, the 4th
109 and the 5th resistance 110 of resistance." 1 ", " 2 ", " 3 " and " 4 " shown in Fig. 2 represent the first end of each coupler, second respectively
End, the 3rd end and the 4th end.
The first end of first coupler 101 is connected with the radar emission port 20, first coupler 101
Second end be connected with first resistor 106, the of the 3rd end of first coupler 101 and second coupler 102
One end is connected, and the 4th end of first coupler 101 is connected with the second end of the 4th coupler 104；
The first end of second coupler 102 is connected with the 3rd end of first coupler 101, second coupling
The second end of clutch 102 is connected with the second end of the 5th coupler 105, the 3rd end of second coupler 102 with
Second resistance 107 is connected, and the 4th end of second coupler 102 is connected with the second end of the 3rd coupler 103；
The first end of 3rd coupler 103 is connected with the 3rd end of the 4th coupler 104, the 3rd coupling
The second end of clutch 103 is connected with the 4th end of second coupler 102, the 3rd end of the 3rd coupler 103 with
The antenna port 40 is connected, and the 4th end of the 3rd coupler 103 is connected with the 3rd resistor 108；
The first end of 4th coupler 104 is connected with the first end of the 5th coupler 105, the 4th coupling
The second end of clutch 104 is connected with the 4th end of first coupler 101, the 3rd end of the 4th coupler 104 with
The first end of 3rd coupler 103 is connected, the 4th end of the 4th coupler 104 and 109 phase of the 4th resistance
Connection；
The first end of 5th coupler 105 is connected with the first end of the 4th coupler 104, the 5th coupling
The second end of clutch 105 is connected with the second end of second coupler 102, the 3rd end of the 5th coupler 105 with
5th resistance 110 is connected, and the 4th end of the 5th coupler 105 is connected with the radar receiving port 30.
It should be noted that connection relation between any of the above-described end all can be electrical connection, can specifically use micro-
Strip line structure 112 is connected.
When radar detection front end 1 is in radar signal state, single-ended radar signal is through the radar emission port
20 are transmitted to the first end of first coupler 101, first end of the single-ended radar signal through first coupler 101
Being divided into the mutually orthogonal radar signal of two-way, i.e. first via radar signal differs 90 ° with the phase of the second tunnel radar signal, and first
First end of the road radar signal through first coupler 101 is transmitted to the 3rd end of first coupler 101, the second road thunder
The 4th end of first coupler 101 is transmitted to up to first end of the signal through first coupler 101, due to the first coupling
The first end of device 101 is as input terminal, therefore the second end of the first coupler 101 is isolation end, and single-ended radar signal is still deposited
The second end of the first coupler 101 is transmitted in residue signal, the residue signal that single-ended radar signal produces is through first coupling
The first end of clutch 101 is transmitted to the second end of first coupler 101, and through the second end of first coupler 101
First resistor 106 is transmitted to be consumed；
Threeth end of the first via radar signal through first coupler 101 is transmitted to second coupler 102
First end, first end of the first via radar signal through second coupler 102 be divided into mutually orthogonal first via thunder
Up to subsignal and the second road radar subsignal, i.e. first via radar subsignal differs 90 ° with the phase of the second road radar subsignal,
First end of the first via radar subsignal through second coupler 102 is transmitted to the 3rd of second coupler 102
End, threeth end of the first via radar subsignal through second coupler 102 are transmitted to the second resistance 107 to carry out
Consumption, the first end of the second road radar subsignal through second coupler 102 are transmitted to second coupler 102
4th end, fourth end of the second road radar subsignal through second coupler 102 are transmitted to the 3rd coupler 103
Second end；
Fourth end of second tunnel radar signal through first coupler 101 is transmitted to the 4th coupler 104
Second end, second end of second tunnel radar signal through the 4th coupler 104 be divided into the 3rd mutually orthogonal road thunder
Up to subsignal and the 4th road radar subsignal, i.e. the 3rd road radar subsignal differs 90 ° with the phase of the 4th road radar subsignal,
Second end of 3rd road radar subsignal through the 4th coupler 104 is transmitted to the 3rd of the 4th coupler 104
End, threeth end of the 3rd road radar subsignal through the 4th coupler 104 are transmitted to the of the 3rd coupler 103
One end, second end of the 4th road radar subsignal through the 4th coupler 104 are transmitted to the 4th coupler 104
4th end, fourth end of the 4th road radar subsignal through the 4th coupler 104 be transmitted to the 4th resistance 109 with
Consumed；
The second road radar subsignal and the 3rd road radar subsignal respectively through the 3rd coupler 103
The first end in-phase stacking of two ends and the 3rd coupler 103 is transmitted to the 3rd end of the 3rd coupler 103, and through institute
The 3rd end for stating the 3rd coupler 103 is transmitted to the antenna port 40；
The second road radar subsignal and the 3rd road radar subsignal respectively through the 3rd coupler 103
The first end inverter transfer of two ends and the 3rd coupler 103 to the 4th end of the 3rd coupler 103 to cancel out each other,
I.e. the second road radar subsignal differs 180 ° with the phase of the 3rd road radar subsignal；
First end of first residue signal through second coupler 102 that the first via radar signal produces is transmitted to
The second end of second coupler 102, since the first end of the second coupler 102 is as input terminal, the second coupler
102 second end is isolation end, and first via radar signal still has that the first residue signal is transmitted to the second coupler 102
Two ends, second end of first residue signal through second coupler 102 are transmitted to the second of the 5th coupler 105
End, second end of second residue signal through the 4th coupler 104 that second tunnel radar signal produces are transmitted to described
The first end of 4th coupler 104, since the second end of the 4th coupler 104 is as input terminal, the 4th coupler 104
First end is isolation end, and the second tunnel radar signal still has the first end that the second residue signal is transmitted to the 4th coupler 104,
First end of second residue signal through the 4th coupler 104 is transmitted to the first end of the 5th coupler 105；
The second end and institute of first residue signal and second residue signal respectively through the 5th coupler 105
The first end in-phase stacking for stating the 5th coupler 105 is transmitted to the 3rd end of the 5th coupler 105, and through the 5th coupling
3rd end of clutch 105 is transmitted to the 5th resistance 110；
The second end and institute of first residue signal and second residue signal respectively through the 5th coupler 105
Same the 4th end for being mutually transmitted to the 5th coupler 105 of first end of the 5th coupler 105 is stated to cancel out each other, i.e., first is residual
The phase of remaining signal and the second residue signal differs 180 °.
According to the explanation of above-mentioned signal stream trend, inputted from radar emission port 20 to the single-ended radar letter of signal isolator
It number can export from antenna port 40, and cancel out each other at radar receiving port 30, be effectively guaranteed the radar letter of transmitting
Number radar receiving terminal is not impacted, effectively improve isolation of the radar emission end to radar receiving terminal.
When radar detection front end 1 is in echo signal reception state, single-ended echo-signal is passed through the antenna port 40
The 3rd end of the 3rd coupler 103 is transported to, threeth end of the single-ended echo-signal through the 3rd coupler 103 is divided into
The mutually orthogonal echo-signal of two-way, threeth end of the first via echo-signal through the 3rd coupler 103 are transmitted to described
The second end of three couplers 103, threeth end of the second tunnel echo-signal through the 3rd coupler 103 are transmitted to the 3rd coupling
The first end of clutch 103, since the 3rd end of the 3rd coupler 103 is as input terminal, the 4th end of the 3rd coupler 103
For isolation end, single-ended echo-signal still has the 4th end that residue signal is transmitted to the 3rd coupler 103, single-ended echo-signal
Threeth end of the residue signal of generation through the 3rd coupler 103 is transmitted to the 4th end of the 3rd coupler 103, and passes through
4th end of the 3rd coupler 103 is transmitted to 3rd resistor 108 to be consumed；
Second end of the first via echo-signal through the 3rd coupler 103 is transmitted to second coupler 102
The 4th end, fourth end of the first via echo-signal through second coupler 102 be divided into the mutually orthogonal first via return
Marble signal and the second road echo subsignal, i.e. first via echo subsignal differ 90 ° with the phase of the second road echo subsignal,
Fourth end of the first via echo subsignal through second coupler 102 is transmitted to the second of second coupler 102
End, second end of the first via echo subsignal through second coupler 102 are transmitted to the of the 5th coupler 105
Two ends, fourth end of the second road echo subsignal through second coupler 102 are transmitted to second coupler 102
First end, the first end of the second road echo subsignal through second coupler 102 are transmitted to first coupler 101
The 3rd end, since the 4th end of the second coupler 102 is as input terminal, the 3rd end of the second coupler 102 is isolation
End, first via echo-signal still have the 3rd end that residue signal is transmitted to the second coupler 102, the production of first via echo-signal
Fourth end of the raw residue signal through second coupler 102 is transmitted to the 3rd end of second coupler 102, and through institute
The 3rd end for stating the second coupler 102 is transmitted to second resistance 107 to be consumed；
First end of second tunnel echo-signal through the 3rd coupler 103 is transmitted to the 4th coupler 104
The 3rd end, threeth end of second tunnel echo-signal through the 4th coupler 104 be divided into the 3rd mutually orthogonal tunnel return
Marble signal and the 4th road echo subsignal, i.e. the 3rd road echo subsignal differ 90 ° with the phase of the 4th road echo subsignal,
Threeth end of 3rd road echo subsignal through the 4th coupler 104 is transmitted to the second of the 4th coupler 104
End, second end of the 3rd road echo subsignal through the 4th coupler 104 are transmitted to the of first coupler 101
Four ends, threeth end of the 4th road echo subsignal through the 4th coupler 104 are transmitted to the 4th coupler 104
First end, first end of the 4th road echo subsignal through the 4th coupler 104 are transmitted to the 5th coupler 105
First end, since the 3rd end of the 4th coupler 104 is as input terminal, the 4th end of the 4th coupler 104 is isolation
End, the second tunnel echo-signal still have the 4th end that residue signal is transmitted to the 4th coupler 104, the second tunnel echo-signal production
Threeth end of the raw residue signal through the 4th coupler 104 is transmitted to the 4th end of the 4th coupler 104, and through institute
The 4th end for stating the 4th coupler 104 is transmitted to the 4th resistance 109 to be consumed；
The first via echo subsignal and the 4th road echo subsignal respectively through the 5th coupler 105
The first end in-phase stacking of two ends and the 5th coupler 105 is transmitted to the 4th end of the 5th coupler 105, and through institute
The 4th end for stating the 5th coupler 105 is transmitted to the radar receiving port 30；
The first via echo subsignal and the 4th road echo subsignal respectively through the 5th coupler 105
The first end inverter transfer of two ends and the 5th coupler 105 to the 3rd end of the 5th coupler 105 to cancel out each other,
I.e. the phase of first via echo subsignal and the 4th road echo subsignal differs 180 °.
It is understood that the second road echo subsignal and the 3rd road echo subsignal are respectively through described first
3rd end of coupler 101 and the 4th end in-phase stacking of first coupler 101 are transmitted to first coupler 101
First end；
The second road echo subsignal and the 3rd road echo subsignal respectively through first coupler 101
4th end inverter transfer of three ends and first coupler 101 to first coupler 101 second end to cancel out each other,
I.e. the phase of the second road echo subsignal and the 3rd road echo subsignal differs 180 °.
It should be noted that due to the echo letter after the second road echo subsignal and the superposition of the 3rd road echo subsignal
Number signal strength it is weaker than the signal strength of single-ended radar signal, therefore the letter that the first end of the first coupler 101 receives
Number radar emission end will not be had an impact.
According to the explanation of above-mentioned signal stream trend, the single-ended echo-signal inputted from antenna port 40 to signal isolator can
To be exported from radar receiving port 30, and do not impacted at radar emission port 20, be effectively guaranteed echo-signal
Receive, further improve the isolation of radar receiving terminal and radar receiving terminal.
Further, first coupler 101, the second coupler 102, the 3rd coupler 103, the 4th coupler 104
With the 5th coupler 105 all can be directional coupler, first coupler 101, the second coupler 102, the 3rd coupler
103 and the 4th coupler 104 can prolong and form loop configuration clockwise, the signal isolator 10 can also include defect
Ground 111,111 is placed in first coupler 101, the second coupler 102, the 3rd coupler 103 and the 4th coupling to the defect
Between clutch 104, the defect 111 be used for reduce between microstrip line construction fields coupling and surface wave.At the same time in order to full
The compactedness of sufficient signal isolator structure, first coupler 101, the second coupler 102, the 3rd coupler 103 and the 4th
90 ° of arc-shaped, electricity that the microstrip line construction 112 carries that microstrip line construction 112 between coupler 104 is designed as 1/4 wavelength
Resistance value is preferably 50 ohm, the first resistor 106, second resistance 107,3rd resistor 108, the 4th resistance 109 and the 5th electricity
Resistance 110 is Chip-R, the first resistor 106, second resistance 107,3rd resistor 108, the 4th resistance 109 and the 5th electricity
The resistance of resistance 110 could be provided as 50 ohm.
Further, the second end of first coupler 101, the 3rd end of the second coupler 102, the 3rd coupler
Fan-shaped offset of microstrip cable architecture 113 at 103 the 4th end, the 4th end of the 4th coupler 104 and the 3rd end of the 5th coupler 105
It is specifically as follows open circuit ground structure, with spread bandwidth.
In the utility model embodiment, by the design of coupler group and resistance, radar emission port is realized to thunder
The process cancelled out each other up to the couple current of receiving port, effectively improves the receipts of radar emission port and radar receiving port
Isolation is sent out, ensure that the use of radar detection front end.
Above disclosed is only the utility model preferred embodiment, cannot limit the utility model with this certainly
Interest field, one of ordinary skill in the art will appreciate that realize all or part of flow of above-described embodiment, and according to this reality
The equivalent variations made with new claim, still fall within the scope that utility model is covered.
Claims (10)
1. a kind of signal isolator, applied in radar detection front end, the radar detection front end includes radar emission port, thunder
Up to receiving port and antenna port, it is characterised in that the signal isolator includes：First coupler, the second coupler, the 3rd
Coupler, the 4th coupler, the 5th coupler, first resistor, second resistance, 3rd resistor, the 4th resistance and the 5th resistance；Its
In,
The first end of first coupler is connected with the radar emission port, the second end of first coupler and the
One resistance is connected, and the 3rd end of first coupler is connected with the first end of second coupler, first coupling
4th end of clutch is connected with the second end of the 4th coupler；
The first end of second coupler is connected with the 3rd end of first coupler, and the second of second coupler
End is connected with the second end of the 5th coupler, and the 3rd end of second coupler is connected with second resistance, described
4th end of the second coupler is connected with the second end of the 3rd coupler；
The first end of 3rd coupler is connected with the 3rd end of the 4th coupler, and the second of the 3rd coupler
End is connected with the 4th end of second coupler, and the 3rd end of the 3rd coupler is connected with the antenna port,
4th end of the 3rd coupler is connected with the 3rd resistor；
The first end of 4th coupler is connected with the first end of the 5th coupler, and the second of the 4th coupler
End is connected with the 4th end of first coupler, the 3rd end of the 4th coupler and the first of the 3rd coupler
End is connected, and the 4th end of the 4th coupler is connected with the 4th resistance；
The first end of 5th coupler is connected with the first end of the 4th coupler, and the second of the 5th coupler
End is connected with the second end of second coupler, and the 3rd end of the 5th coupler is connected with the 5th resistance,
4th end of the 5th coupler is connected with the radar receiving port.
2. signal isolator according to claim 1, it is characterised in that：
First end of the single-ended radar signal through the radar emission port transmission to first coupler, the single-ended radar letter
Number first end through first coupler is divided into the mutually orthogonal radar signal of two-way, and first via radar signal is through described first
The first end of coupler is transmitted to the 3rd end of first coupler, the second tunnel radar signal through first coupler
One end is transmitted to the 4th end of first coupler；
Threeth end of the first via radar signal through first coupler is transmitted to the first end of second coupler, institute
State first end of the first via radar signal through second coupler and be divided into mutually orthogonal first via radar subsignal and second
Road radar subsignal, first end of the first via radar subsignal through second coupler are transmitted to second coupler
The 3rd end, threeth end of the first via radar subsignal through second coupler is transmitted to the second resistance, described
Second first end of the road radar subsignal through second coupler is transmitted to the 4th end of second coupler, and described second
Fourth end of the road radar subsignal through second coupler is transmitted to the second end of the 3rd coupler；
Fourth end of second tunnel radar signal through first coupler is transmitted to the second end of the 4th coupler, institute
State second end of the second tunnel radar signal through the 4th coupler and be divided into mutually orthogonal the 3rd road radar subsignal and the 4th
Road radar subsignal, second end of the 3rd road radar subsignal through the 4th coupler are transmitted to the 4th coupler
The 3rd end, threeth end of the 3rd road radar subsignal through the 4th coupler is transmitted to the of the 3rd coupler
One end, second end of the 4th road radar subsignal through the 4th coupler are transmitted to the 4th of the 4th coupler
End, fourth end of the 4th road radar subsignal through the 4th coupler is transmitted to the 4th resistance；
The second end of the second road radar subsignal and the 3rd road radar subsignal respectively through the 3rd coupler and
The first end in-phase stacking of 3rd coupler is transmitted to the 3rd end of the 3rd coupler, and through the 3rd coupler
The 3rd end be transmitted to the antenna port；
The second end of the second road radar subsignal and the 3rd road radar subsignal respectively through the 3rd coupler and
The first end inverter transfer of 3rd coupler is to the 4th end of the 3rd coupler to cancel out each other；
First end of first residue signal through second coupler that the first via radar signal produces is transmitted to described the
The second end of two couplers, second end of first residue signal through second coupler are transmitted to the 5th coupler
Second end, second tunnel radar signal produce second end of second residue signal through the 4th coupler be transmitted to institute
The first end of the 4th coupler is stated, first end of second residue signal through the 4th coupler is transmitted to the 5th coupling
The first end of clutch；
The second end and the described 5th of first residue signal and second residue signal respectively through the 5th coupler
The first end in-phase stacking of coupler is transmitted to the 3rd end of the 5th coupler, and through the 3rd end of the 5th coupler
It is transmitted to the 5th resistance；
The second end and the described 5th of first residue signal and second residue signal respectively through the 5th coupler
The first end inverter transfer of coupler is to the 4th end of the 5th coupler to cancel out each other.
3. signal isolator according to claim 1, it is characterised in that：
Single-ended echo-signal is transmitted to the 3rd end of the 3rd coupler, the single-ended echo-signal warp through the antenna port
3rd end of the 3rd coupler is divided into the mutually orthogonal echo-signal of two-way, and first via echo-signal is through the described 3rd coupling
3rd end of device is transmitted to the second end of the 3rd coupler, threeth end of the second tunnel echo-signal through the 3rd coupler
It is transmitted to the first end of the 3rd coupler；
Second end of the first via echo-signal through the 3rd coupler is transmitted to the 4th end of second coupler, institute
State fourth end of the first via echo-signal through second coupler and be divided into mutually orthogonal first via echo subsignal and second
Road echo subsignal, fourth end of the first via echo subsignal through second coupler are transmitted to second coupler
Second end, second end of the first via echo subsignal through second coupler be transmitted to the of the 5th coupler
Two ends, fourth end of the second road echo subsignal through second coupler are transmitted to the first of second coupler
End, the first end of the second road echo subsignal through second coupler are transmitted to the 3rd end of first coupler；
First end of second tunnel echo-signal through the 3rd coupler is transmitted to the 3rd end of the 4th coupler, institute
State threeth end of the second tunnel echo-signal through the 4th coupler and be divided into mutually orthogonal the 3rd road echo subsignal and the 4th
Road echo subsignal, threeth end of the 3rd road echo subsignal through the 4th coupler are transmitted to the 4th coupler
Second end, second end of the 3rd road echo subsignal through the 4th coupler be transmitted to the of first coupler
Four ends, threeth end of the 4th road echo subsignal through the 4th coupler are transmitted to the first of the 4th coupler
End, first end of the 4th road echo subsignal through the 4th coupler are transmitted to the first end of the 5th coupler；
The second end of the first via echo subsignal and the 4th road echo subsignal respectively through the 5th coupler and
The first end in-phase stacking of 5th coupler is transmitted to the 4th end of the 5th coupler, and through the 5th coupler
The 4th end be transmitted to the radar receiving port；
The second end of the first via echo subsignal and the 4th road echo subsignal respectively through the 5th coupler and
The first end inverter transfer of 5th coupler is to the 3rd end of the 5th coupler to cancel out each other.
4. signal isolator according to claim 1, it is characterised in that with further including defect；
First coupler, the second coupler, the 3rd coupler and the 4th coupler prolong forms loop configuration clockwise,
The defect it is placed between first coupler, the second coupler, the 3rd coupler and the 4th coupler.
5. signal isolator according to claim 1, it is characterised in that first coupler, the second coupler, the 3rd
Coupler, the 4th coupler and the 5th coupler are directional coupler；
The first resistor, second resistance, 3rd resistor, the 4th resistance and the 5th resistance are Chip-R.
6. a kind of radar detection front end, including radar emission port, radar receiving port and antenna port, it is characterised in that also
Including：Signal isolator, the signal isolator include：First coupler, the second coupler, the 3rd coupler, the 4th coupling
Device, the 5th coupler, first resistor, second resistance, 3rd resistor, the 4th resistance and the 5th resistance；Wherein,
The first end of first coupler is connected with the radar emission port, the second end of first coupler and the
One resistance is connected, and the 3rd end of first coupler is connected with the first end of second coupler, first coupling
4th end of clutch is connected with the second end of the 4th coupler；
The first end of second coupler is connected with the 3rd end of first coupler, and the second of second coupler
End is connected with the second end of the 5th coupler, and the 3rd end of second coupler is connected with second resistance, described
4th end of the second coupler is connected with the second end of the 3rd coupler；
The first end of 3rd coupler is connected with the 3rd end of the 4th coupler, and the second of the 3rd coupler
End is connected with the 4th end of second coupler, and the 3rd end of the 3rd coupler is connected with the antenna port,
4th end of the 3rd coupler is connected with the 3rd resistor；
The first end of 4th coupler is connected with the first end of the 5th coupler, and the second of the 4th coupler
End is connected with the 4th end of first coupler, the 3rd end of the 4th coupler and the first of the 3rd coupler
End is connected, and the 4th end of the 4th coupler is connected with the 4th resistance；
The first end of 5th coupler is connected with the first end of the 4th coupler, and the second of the 5th coupler
End is connected with the second end of second coupler, and the 3rd end of the 5th coupler is connected with the 5th resistance,
4th end of the 5th coupler is connected with the radar receiving port.
7. radar detection front end according to claim 6, it is characterised in that：
First end of the single-ended radar signal through the radar emission port transmission to first coupler, the single-ended radar letter
Number first end through first coupler is divided into the mutually orthogonal radar signal of two-way, and first via radar signal is through described first
The first end of coupler is transmitted to the 3rd end of first coupler, the second tunnel radar signal through first coupler
One end is transmitted to the 4th end of first coupler；
Threeth end of the first via radar signal through first coupler is transmitted to the first end of second coupler, institute
State first end of the first via radar signal through second coupler and be divided into mutually orthogonal first via radar subsignal and second
Road radar subsignal, first end of the first via radar subsignal through second coupler are transmitted to second coupler
The 3rd end, threeth end of the first via radar subsignal through second coupler is transmitted to the second resistance, described
Second first end of the road radar subsignal through second coupler is transmitted to the 4th end of second coupler, and described second
Fourth end of the road radar subsignal through second coupler is transmitted to the second end of the 3rd coupler；
Fourth end of second tunnel radar signal through first coupler is transmitted to the second end of the 4th coupler, institute
State second end of the second tunnel radar signal through the 4th coupler and be divided into mutually orthogonal the 3rd road radar subsignal and the 4th
Road radar subsignal, second end of the 3rd road radar subsignal through the 4th coupler are transmitted to the 4th coupler
The 3rd end, threeth end of the 3rd road radar subsignal through the 4th coupler is transmitted to the of the 3rd coupler
One end, second end of the 4th road radar subsignal through the 4th coupler are transmitted to the 4th of the 4th coupler
End, fourth end of the 4th road radar subsignal through the 4th coupler is transmitted to the 4th resistance；
The second end of the second road radar subsignal and the 3rd road radar subsignal respectively through the 3rd coupler and
The first end in-phase stacking of 3rd coupler is transmitted to the 3rd end of the 3rd coupler, and through the 3rd coupler
The 3rd end be transmitted to the antenna port；
The second end of the second road radar subsignal and the 3rd road radar subsignal respectively through the 3rd coupler and
The first end inverter transfer of 3rd coupler is to the 4th end of the 3rd coupler to cancel out each other；
First end of first residue signal through second coupler that the first via radar signal produces is transmitted to described the
The second end of two couplers, second end of first residue signal through second coupler are transmitted to the 5th coupler
Second end, second tunnel radar signal produce second end of second residue signal through the 4th coupler be transmitted to institute
The first end of the 4th coupler is stated, first end of second residue signal through the 4th coupler is transmitted to the 5th coupling
The first end of clutch；
The second end and the described 5th of first residue signal and second residue signal respectively through the 5th coupler
The first end in-phase stacking of coupler is transmitted to the 3rd end of the 5th coupler, and through the 3rd end of the 5th coupler
It is transmitted to the 5th resistance；
The second end and the described 5th of first residue signal and second residue signal respectively through the 5th coupler
The first end of coupler is with the 4th end for being mutually transmitted to the 5th coupler to cancel out each other.
8. radar detection front end according to claim 6, it is characterised in that：
Single-ended echo-signal is transmitted to the 3rd end of the 3rd coupler, the single-ended echo-signal warp through the antenna port
3rd end of the 3rd coupler is divided into the mutually orthogonal echo-signal of two-way, and first via echo-signal is through the described 3rd coupling
3rd end of device is transmitted to the second end of the 3rd coupler, threeth end of the second tunnel echo-signal through the 3rd coupler
It is transmitted to the first end of the 3rd coupler；
Second end of the first via echo-signal through the 3rd coupler is transmitted to the 4th end of second coupler, institute
State fourth end of the first via echo-signal through second coupler and be divided into mutually orthogonal first via echo subsignal and second
Road echo subsignal, fourth end of the first via echo subsignal through second coupler are transmitted to second coupler
Second end, second end of the first via echo subsignal through second coupler be transmitted to the of the 5th coupler
Two ends, fourth end of the second road echo subsignal through second coupler are transmitted to the first of second coupler
End, the first end of the second road echo subsignal through second coupler are transmitted to the 3rd end of first coupler；
First end of second tunnel echo-signal through the 3rd coupler is transmitted to the 3rd end of the 4th coupler, institute
State threeth end of the second tunnel echo-signal through the 4th coupler and be divided into mutually orthogonal the 3rd road echo subsignal and the 4th
Road echo subsignal, threeth end of the 3rd road echo subsignal through the 4th coupler are transmitted to the 4th coupler
Second end, second end of the 3rd road echo subsignal through the 4th coupler be transmitted to the of first coupler
Four ends, threeth end of the 4th road echo subsignal through the 4th coupler are transmitted to the first of the 4th coupler
End, first end of the 4th road echo subsignal through the 4th coupler are transmitted to the first end of the 5th coupler；
The second end of the first via echo subsignal and the 4th road echo subsignal respectively through the 5th coupler and
The first end in-phase stacking of 5th coupler is transmitted to the 4th end of the 5th coupler, and through the 5th coupler
The 4th end be transmitted to the radar receiving port；
The second end of the first via echo subsignal and the 4th road echo subsignal respectively through the 5th coupler and
The first end inverter transfer of 5th coupler is to the 3rd end of the 5th coupler to cancel out each other.
9. radar detection front end according to claim 6, it is characterised in that the signal isolator is with further including defect；
First coupler, the second coupler, the 3rd coupler and the 4th coupler prolong forms loop configuration clockwise,
The defect it is placed between first coupler, the second coupler, the 3rd coupler and the 4th coupler.
10. radar detection front end according to claim 6, it is characterised in that first coupler, the second coupler,
3rd coupler, the 4th coupler and the 5th coupler are directional coupler；
The first resistor, second resistance, 3rd resistor, the 4th resistance and the 5th resistance are Chip-R.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721087322.XU CN207368233U (en) | 2017-08-28 | 2017-08-28 | A kind of signal isolator and radar detection front end |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721087322.XU CN207368233U (en) | 2017-08-28 | 2017-08-28 | A kind of signal isolator and radar detection front end |
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| CN207368233U true CN207368233U (en) | 2018-05-15 |
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