CN108445478A - A kind of automobile-used millimeter wave angle radar system - Google Patents
A kind of automobile-used millimeter wave angle radar system Download PDFInfo
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- CN108445478A CN108445478A CN201810247532.3A CN201810247532A CN108445478A CN 108445478 A CN108445478 A CN 108445478A CN 201810247532 A CN201810247532 A CN 201810247532A CN 108445478 A CN108445478 A CN 108445478A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S13/00—Systems using the reflection or reradiation of radio waves, e.g. radar systems; Analogous systems using reflection or reradiation of waves whose nature or wavelength is irrelevant or unspecified
- G01S13/02—Systems using reflection of radio waves, e.g. primary radar systems; Analogous systems
- G01S13/50—Systems of measurement based on relative movement of target
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Abstract
The invention discloses a kind of automobile-used millimeter wave angle radar systems, the automobile-used millimeter wave angle radar system includes first jiao of radar and second jiao of radar, first jiao of radar and second jiao of radar are respectively arranged at the both ends of the tailstock, and first jiao of radar in plane and vehicle body there is the first angle, second jiao of radar to have the second angle in plane and the vehicle body；In the horizontal plane, at least first jiao of radar has the first maximum gain and the second maximum gain；And first gain direction be biased to the side of the corresponding vehicle of first jiao of radar, and second gain direction be biased to vehicle rear, make first jiao of radar that can detect the farther distance in side of the corresponding vehicle of first jiao of radar, the farther distance in rear of energy probe vehicles again, therefore the more remote purpose in rear and side of detection speed has been reached while not increasing the complexity of automobile-used millimeter wave angle radar system design, and the integrated level for improving automobile-used millimeter wave angle radar system reduces the cost of automobile-used millimeter wave angle radar system.
Description
Technical field
The present embodiments relate to Radar Technology field more particularly to a kind of automobile-used millimeter wave angle radar systems.
Background technology
As what intelligent driving and automotive safety assisted popularizes, millimetre-wave radar system is played the role of increasingly heavy
It wants.And as the indispensable part of millimetre-wave radar system-angle radar, it is mainly used for realizing that rearward collision early warning, lane change are auxiliary
It helps, reversing auxiliary, and collision auxiliary etc. of opening the door, therefore in general angle radar is required for the very wide visual field.
Antenna system in existing angle radar generally realizes the wide visual field using the antenna with larger beam angle
It is required that however the antenna of broad beam generally all have lower gain, to limit detection range.And under normal circumstances,
In order to enable angle radar to cover enough visual angles, allowed when angle radar is set its with vehicle body shape in an angle, antenna beam exists
Gain vertically with angle radar in the direction of plane is maximum, and when deviateing the direction, antenna gain starts to reduce, thus into
One step limits the dead astern of vehicle and the detection range of side.
Invention content
The present invention provides a kind of automobile-used millimeter wave angle radar system, to realize same angle radar in the dead astern and side of vehicle body
Realize that more detection at a distance improves integrated level to simplify the design of automobile-used millimeter wave angle radar system, reduces automobile-used in face
The cost of millimeter wave angle radar system.
In a first aspect, an embodiment of the present invention provides a kind of automobile-used millimeter wave angle radar system, including first jiao of radar and
Second jiao of radar, first jiao of radar and second jiao of radar are respectively arranged at the both ends of the tailstock, and first jiao of thunder
Up to place plane and vehicle body there is the first angle, second jiao of radar to have the second angle in plane and the vehicle body；
In the horizontal plane, at least described first jiao of radar has the first maximum gain and the second maximum gain；
There is the first deflection angle, and described the between the first gain direction and first direction of first maximum gain
One gain direction is biased to the side of the corresponding vehicle of first jiao of radar, the second gain direction of second maximum gain and institute
Stating between first direction has the second deflection angle, and second gain direction is biased to the rear of the vehicle, wherein described the
One direction and first jiao of radar are vertical in plane.
Specifically, second jiao of radar has third maximum gain and the 4th maximum gain；
There is third to deflect angle, and described the between the third gain direction and second direction of the third maximum gain
Three gain directions are biased to the side of the corresponding vehicle of second jiao of radar, the 4th gain direction of the 4th maximum gain and institute
Stating has quadrupole deflector angle between second direction, and the 4th gain direction is biased to the rear of the vehicle, wherein described the
Two directions and second jiao of radar are vertical in plane.
Specifically, first angle and second angle are equal, the first deflection angle and second deflection
Angle is equal.
Specifically, the second deflection angle and first angle are equal.
Specifically, first jiao of radar includes radar chip, receiving antenna array, the first transmitting antenna array and second
Transmitting antenna array；First transmitting antenna array is connect by the first feeding network with the radar chip, and described second
Transmitting antenna array is connect by the second feeding network with the radar chip；
First feeding network includes the first input line and multiple first output lines, first input line and multiple institutes
The first output line is stated to connect by the first intermediate node；The first of the input terminal of first input line and the radar chip is defeated
Outlet connects, and multiple first output lines are corresponded with the single-row antenna in first transmitting antenna array respectively to be connected
It connects, the length of multiple first output lines is different；
Second feeding network includes the second input line and multiple second output lines, second input line and multiple institutes
The second output line is stated to connect by the second intermediate node；The second of the input terminal of second input line and the radar chip is defeated
Outlet connects, and multiple second output lines are corresponded with the single-row antenna in second transmitting antenna array respectively to be connected
It connects, the length of multiple second output lines is different.
Multiple first output lines are sorted-by-length, the length difference l1 and spacing of two adjacent first output lines
The relationship of d1 and the first deflection angle c is
Multiple second output lines are sorted-by-length, the length difference l2 and spacing of two adjacent second output lines
The relationship of d2 and the first deflection angle d is
Wherein, λ0It is the wavelength that the wave beam of the millimetre-wave radar system transmitting is propagated in air, λgIt is the millimeter wave
The wavelength that the wave beam of radar system transmitting is propagated in first output line.
Specifically, the radar chip is for the first transmitting antenna array and second transmitting antenna described in Time-sharing control
Array emitter signal；
First maximum gain is the maximum gain of first transmitting antenna array, and second maximum gain is institute
State the maximum gain of the second transmitting antenna array.
Specifically, second jiao of radar is identical with first jiao of radar arrangement.
Specifically, first transmitting antenna array and the single-row antenna of second transmitting antenna array is equal in number
In or more than 2.
Specifically, the distance between adjacent two lists array antenna is equal or unequal in the receiving antenna array.
Specifically, first jiao of radar further includes dielectric substrate；
The radar chip is fixed on a side surface of the dielectric substrate, the receiving antenna array, the first transmitting day
Linear array and the second transmitting antenna array are printed on the dielectric substrate, and are in same side with the radar chip.
The present invention has the first maximum gain and the second maximum gain by designing first jiao of radar, makes the first maximum gain
The first gain direction be biased to the side of the corresponding vehicle of first jiao of radar, after the second gain direction of the second maximum gain is vehicle
Side, make first jiao of radar can detect the corresponding vehicle of first jiao of radar the farther distance in side and probe vehicles rear more
Remote distance, therefore after having reached while not increasing the complexity of automobile-used millimeter wave angle radar system design detection speed
Side and the more remote purpose in side, and the integrated level of automobile-used millimeter wave angle radar system is improved, reduce automobile-used millimeter wave
The cost of angle radar system.
Description of the drawings
Fig. 1 is a kind of structural schematic diagram of automobile-used millimeter wave angle radar system provided in an embodiment of the present invention；
Fig. 2 is a kind of structural schematic diagram of first jiao of radar provided in an embodiment of the present invention；
Fig. 3 is a kind of structural representation of first feeding network and the first transmitting antenna array provided in an embodiment of the present invention
Figure；
Fig. 4 is a kind of structural representation of second feeding network and the second transmitting antenna array provided in an embodiment of the present invention
Figure；
Fig. 5 is a kind of structural schematic diagram of first feeding network provided in an embodiment of the present invention；
Fig. 6 is a kind of structural schematic diagram of second feeding network provided in an embodiment of the present invention；
Fig. 7 is a kind of gain schematic diagram of the horizontal direction of transmitting antenna array provided in an embodiment of the present invention；
Fig. 8 is a kind of gain schematic diagram of the horizontal direction of first jiao of radar provided in an embodiment of the present invention.
Specific implementation mode
The present invention is described in further detail with reference to the accompanying drawings and examples.It is understood that this place is retouched
The specific embodiment stated is used only for explaining the present invention rather than limitation of the invention.It also should be noted that in order to just
Only the parts related to the present invention are shown in description, attached drawing rather than entire infrastructure.
Fig. 1 is a kind of structural schematic diagram of automobile-used millimeter wave angle radar system provided in an embodiment of the present invention, the present embodiment
Situations such as being applicable to automobile-used angle radar detection driving rear and the remote environment in side, the automobile-used millimeter wave angle radar system
Including first jiao of radar 110 and second jiao of radar 120, first jiao of radar 110 and second jiao of radar 120 are respectively arranged at the tailstock
Ends A and B, and first jiao of 110 place plane of radar has the first angle a, second jiao of 120 place plane of radar and vehicle with vehicle body
Body has the second angle b.
In the horizontal plane, at least first jiao of radar 110 has the first maximum gain and the second maximum gain.
There is the first deflection angle c, and first increases between the first gain direction x1 and first direction x of first maximum gain
Beneficial direction x1 is biased to the side of first jiao of 110 corresponding vehicle of radar, the second gain direction x2 and first party of the second maximum gain
Angle d, and the rear of the second gain direction x2 deviation vehicles, wherein first direction x and first jiao of thunder are deflected to having second between x
It is vertical up to 110 place planes.
Specifically, first jiao of radar 110 and second jiao of radar 120 are respectively placed in the ends A and B of the tailstock, and first jiao
110 place plane of radar with vehicle body there is the first angle a, second jiao of 120 place plane of radar to have the second angle b with vehicle body,
First jiao of radar 110 and second jiao of radar 120 is set to cover the larger range of visual angle in side and rear of vehicle body.The prior art
In, the maximum gain direction of the wave beam of first jiao of radar and second jiao of radar emission is vertical direction of the angle radar in plane,
The maximum gain direction of the wave beam of i.e. first jiao radar emission is first direction x, and the wave beam of second jiao of radar emission most increases
Beneficial direction is second direction y.And in the side and rear of vehicle body, the decaying of the wave beam of angle radar emission is serious, and gain is small, detection
Apart from short.The gain in direction of first jiao of radar behind the side of vehicle body and vehicle is small, and detection range is short；Second jiao of radar is in vehicle body
Side and vehicle after direction gain it is small, detection range is short.
In the technical solution of the present embodiment, first jiao of radar 110 has the first maximum gain and the second maximum gain.The
First gain direction of one maximum gain is the first gain direction x1 in Fig. 1, has the first deflection between first direction x
Angle c.On the first gain direction x1, there is first jiao of radar 110 first maximum gain, the first gain direction x1 to be directed toward first
The side of 110 corresponding vehicle of angle radar, therefore first jiao of radar 110 is corresponded in first jiao of radar 110 there are one the side tools of vehicle
Maximum gain is capable of the farther distance in side of probe vehicles.First jiao of radar 110 has the second maximum in the second gain direction x2
Gain, the second gain direction x2 are oriented to the rear of vehicle, therefore first jiao of radar 110 also has that there are one most increase at the rear of vehicle
Benefit is capable of the farther distance in rear of probe vehicles.It is corresponded to it follows that first jiao of radar 110 can detect first jiao of radar 110
Vehicle the farther distance in side, and can probe vehicles the farther distance in rear, therefore do not increasing automobile-used millimeter wave angle radar
The more remote purpose in rear and side of detection speed is reached while the complexity of system design, and has improved automobile-used
The integrated level of millimeter wave angle radar system, reduces the cost of automobile-used millimeter wave angle radar system.
It should be noted that the size of the first maximum gain and the second maximum gain can be equal or unequal.First most
The size of large gain and the second maximum gain depends on the design of first jiao of radar 110.When the distance at the rear of probe vehicles is opposite
When the distance of the side of probe vehicles is distant, it is bigger that the second maximum gain can be designed.Alternatively, the first maximum gain and second
Maximum gain is equal in magnitude, and the required gain in the distant direction of required detection range of being subject to designs.
The technical solution of the present embodiment has the first maximum gain and the second maximum gain by designing first jiao of radar,
The first gain direction of the first maximum gain is set to be biased to the side of the corresponding vehicle of first jiao of radar, the second of the second maximum gain increases
Beneficial direction be vehicle rear, make first jiao of radar can detect the corresponding vehicle of first jiao of radar the farther distance in side and
The farther distance in rear of probe vehicles, therefore reach while not increasing the complexity of automobile-used millimeter wave angle radar system design
The rear and side more remote purpose of detection speed, and the integrated level of automobile-used millimeter wave angle radar system is improved,
Reduce the cost of automobile-used millimeter wave angle radar system.
It continues to refer to figure 1, based on the above technical solution, second jiao of radar 120 has third maximum gain and the
Four maximum gains.
There is third to deflect angle e, and third increases between the third gain direction y1 and second direction y of third maximum gain
Beneficial direction y1 is biased to the side of second jiao of 120 corresponding vehicle of radar, the 4th gain direction y2 and second party of the 4th maximum gain
To having quadrupole deflector angle f between y, and the 4th gain direction y2 is biased to the rear of vehicle, wherein second direction y and second jiao of thunder
It is vertical up to 120 place planes.
Similar with first jiao of radar 110, second jiao of radar 120 has third maximum gain and the 4th maximum gain.Third
There is third deflection angle e between the third gain direction y1 and second direction y of maximum gain.On third gain direction y1,
There is second jiao of radar 120 third maximum gain, third gain direction y1 to be directed toward the side of second jiao of 120 corresponding vehicle of radar,
Therefore there are one maximum gains in the side of second jiao of 120 corresponding vehicle of radar tool for second jiao of radar 120, can detect second jiao
The farther distance in side of 120 corresponding vehicle of radar.Second jiao of radar 120 has the 4th most to increase in the 4th gain direction y2
Benefit, the 4th gain direction y2 is directed toward the rear of vehicle, therefore second jiao of radar 120 also has at the rear of vehicle there are one maximum gain,
It is capable of the farther distance in rear of probe vehicles.It follows that can to detect second jiao of radar 120 corresponding for second jiao of radar 120
The farther distance in side of vehicle, and the farther distance in rear of energy probe vehicles, therefore do not increasing automobile-used millimeter wave angle radar system
Reach the more remote purpose in rear and side of detection speed while the complexity for design of uniting, and improves automobile-used milli
The integrated level of metric wave angle radar system reduces the cost of automobile-used millimeter wave angle radar system.
First jiao of radar 110 and second jiao of radar 120 can be carried out at the same time detection.It needs to control first jiao of radar respectively at this time
110 and second jiao of radar 120 work.First jiao of radar 110 detects the rear of the side and vehicle of first jiao of 110 corresponding vehicle of radar
Environment, second jiao of radar 120 detect the environment of the side of second jiao of 120 corresponding vehicle of radar and the rear of vehicle.
First jiao of radar 110 and second jiao of radar 120 realize the detection of the environment to the both sides and rear of vehicle.In addition, automobile-used milli
The frequency of metric wave angle radar system work is high frequency, generally in 30-300GHz, such as can be 77GHz, therefore its work period
Time is very short.First jiao of radar 110 and second jiao of radar 120 can also use the alternate operating mode of timesharing, can control at this time
First jiao of radar 110 and second jiao of 120 timesharing of radar alternately work, and the driving to the both sides and rear of vehicle equally may be implemented
The detection of environment.
It should be noted that the first maximum gain and the second maximum gain and second jiao of radar 120 of first jiao of radar 110
Third maximum gain and the 4th maximum gain it is mutual indepedent, respectively with the design and second jiao of radar 120 of first jiao of radar 110
Design it is related.
On the basis of the various embodiments described above, the first angle a and the second angle b are equal, and the first deflection angle c and second is inclined
It is equal to turn angle d.
Specifically, the first angle a and the second angle b are equal, then first jiao of radar 110 and second jiao of setting of radar 120 exists
The ends A of the tailstock and B are according to the front-rear direction CC ' axial symmetry of vehicle body 100.Therefore, when the first gain side of first jiao of radar 110
To x1 be biased to first jiao of 110 corresponding vehicle of radar side, the second gain direction x2 correspond to vehicle rear and second jiao of radar
120 third gain direction y1 is biased to the side of second jiao of 120 corresponding vehicle of radar, and the 4th gain direction y2 corresponds to the rear of vehicle
When, first jiao of 110 maximum gain direction of radar is biased to the inclined of the first gain direction x1 and the second gain direction x2 by first direction x
The maximum gain direction of gyration and second jiao of radar 120 is biased to third gain direction y1 and the 4th gain side by second direction y
Deflection angle to y2 is equal.Therefore, the design of first jiao of radar 110 and second jiao of radar 120 can be simplified.
When the first deflection angle c and the second deflection angle d equal, then the first deflection angle c and the second deflection angle d are
45 °, the first gain direction x1 and the second gain direction x2 are vertical.Because first direction x is flat where first jiao of radar 110
Face, therefore the first angle a is similarly 45 °.
On the basis of the various embodiments described above, the second deflection angle d and the first angle a is equal.
When first jiao of 110 place plane of radar and vehicle body 100 have the first angle a, the of first jiao of radar 110 is adjusted
Two maximum gains deviate the angle of a from first direction x to vehicle rear so that the second deflection angle d and the first angle a is equal.This
When, the second gain direction is directed toward the dead astern of vehicle, so as to the farther distance in the dead astern of probe vehicles.
Fig. 2 is a kind of structural schematic diagram of first jiao of radar provided in an embodiment of the present invention, and Fig. 3 carries for the embodiment of the present invention
The structural schematic diagram of a kind of first feeding network and the first transmitting antenna array that supply, Fig. 4 are provided in an embodiment of the present invention one
The structural schematic diagram of kind the second feeding network and the second transmitting antenna array.The present embodiment on the basis of the various embodiments described above,
First jiao of radar 110 includes radar chip 111, receiving antenna array 112, the first transmitting antenna array 113 and second transmitting day
Linear array 114；First transmitting antenna array 113 is connect by the first feeding network 115 with radar chip 111, the second transmitting day
Linear array 114 is connect by the second feeding network 116 with radar chip 111.
First feeding network 115 includes the first input line 1151 and multiple first output lines 1152, the first input line 1151
It is connected by the first intermediate node 1153 with multiple first output lines 1152；The input terminal of first input line 1151 and radar chip
111 the first output end connection, multiple first output lines 1152 respectively with the single-row antenna one in the first transmitting antenna array 113
One is correspondingly connected with, and the length of multiple first output lines 1152 is different.
Second feeding network 116 includes the second input line 1161 and multiple second output lines 1162, the second input line 1161
It is connected by the second intermediate node 1163 with multiple second output lines 1162；The input terminal of second input line 1161 and radar chip
111 second output terminal connection, multiple second output lines 1162 respectively with the single-row antenna one in the second transmitting antenna array 114
One is correspondingly connected with, and the length of multiple second output lines 1162 is different.
Specifically, as shown in figure 3, when automobile-used millimeter wave angle radar system works, radar chip 111 emits millimeter wave letter
Number, the first intermediate node 1153, the first intermediate node 1153 are input to by the first input line 1151 of the first feeding network 115
Millimeter-wave signal is input to multiple first output lines 1152 simultaneously, because the length of multiple first output lines 1152 is different, more
The transmission speed of the millimeter-wave signal transmitted in a first output line 1152 is identical, therefore after multiple first output lines 1152
Being input between the millimeter-wave signal of single-row antenna different in the first transmitting antenna array 113 has phase difference.First transmitting day
The value of phase difference between the millimeter-wave signal transmitted in different single-row antennas in linear array 113 can adjust the first transmitting day
The maximum gain direction for the millimeter wave that linear array 113 emits.It therefore can be by adjusting between multiple first output lines 1152
Length difference adjusts the phase difference of the millimeter-wave signal in single-row antenna different in the first transmitting antenna array 113, to adjust
The maximum gain direction of the millimeter wave of first transmitting antenna array 113 transmitting.
As shown in figure 4, the length of multiple second output lines 1162 of the second feeding network 116 is also different.Its operation principle
Identical as the first feeding network 115, details are not described herein again.By multiple second output lines 1162 of the second feeding network 116 it
Between length difference adjust the phase difference of the millimeter-wave signal in the second transmitting antenna array 114 in different single-row antenna, to
Adjust the maximum gain direction of the millimeter wave of the second transmitting antenna array 114 transmitting.
It should be noted that the length difference of the first output line 1152 adjacent in the first feeding network 115 is equal.Such as Fig. 3
Shown, illustratively, the first feeding network 115 includes 3 the first output lines, 1152,3 the first output lines 1152 according to length
From be short to length be ranked sequentially, the length difference of the first output line 1152 of shortest length and the first output line 1152 of intermediate length with
First output line 1152 of intermediate length is equal with the length difference of the first output line 1152 of extreme length, the first launching antenna array
The phase difference of adjacent single-row antenna is equal in row 113.Similarly, in the second feeding network 116 adjacent single-row antenna length
Difference is equal.
First jiao of radar 110 has the first transmitting antenna array 113 and the second transmitting antenna array 114, the first transmitting day
Linear array 113 adjusts the first transmitting day by adjusting the length difference of the first adjacent output line 1152 in the first feeding network 115
The maximum gain direction of linear array 113.Second transmitting antenna array 114 is by adjusting adjacent the in the second feeding network 116
The length difference of two output lines 1162 adjusts the maximum gain direction of the second transmitting antenna array 114.When the first transmitting antenna array
Maximum gain direction correspond to first jiao of radar 110 the first gain direction x1 or the second gain direction x2, the second transmitting antenna
When the maximum gain direction of array corresponds to the second gain direction x2 or the first gain direction x1 of first jiao of radar 110, first jiao
Radar 110 realizes has maximum gain at the rear of the side of the corresponding vehicle of first jiao of radar and vehicle, has made first jiao of radar 110 both
The farther distance in side of the corresponding vehicle of first jiao of radar, and the farther distance in rear of energy probe vehicles can be detected, therefore not
The farther distance in rear and side of detection speed is reached while the complexity for increasing automobile-used millimeter wave angle radar system design
Purpose, and improve the integrated level of automobile-used millimeter wave angle radar system, reduce the cost of automobile-used millimeter wave angle radar system.
The technical solution of the present embodiment, the length difference by adjusting the first adjacent output line in the first feeding network are adjusted
The maximum gain direction of first transmitting antenna array, the length difference of the second adjacent output line adjusts second in the second feeding network
The maximum gain direction of transmitting antenna array makes first jiao of radar realize in the side of the corresponding vehicle of first jiao of radar and vehicle
There is maximum gain at rear, and the rear of the farther distance in side and probe vehicles that can detect the corresponding vehicle of first jiao of radar is more
Remote distance, therefore after having reached while not increasing the complexity of automobile-used millimeter wave angle radar system design detection speed
Side and the more remote purpose in side, and the integrated level of automobile-used millimeter wave angle radar system is improved, reduce automobile-used millimeter wave
The cost of angle radar system.
Fig. 5 is a kind of structural schematic diagram of first feeding network provided in an embodiment of the present invention, and Fig. 6 is the embodiment of the present invention
A kind of structural schematic diagram of second feeding network provided.On the basis of above-mentioned each embodiment, multiple first output lines
1152 is sorted-by-length, the pass of the length difference l1 and spacing d1 and the first deflection angle c of adjacent two the first output lines 1152
System is
Multiple second output lines 1162 are sorted-by-length, the length difference l2 and spacing of two adjacent the second output lines 1162
The relationship of the deflections of d2 and first angle d is
Wherein, λ0It is the wavelength that the wave beam of millimetre-wave radar system transmitting is propagated in air, λgIt is millimetre-wave radar system
The wavelength that the wave beam of transmitting is propagated in the first output line 1152.
Specifically, illustrate by taking the first feeding network 115 as an example.The speed for the millimeter wave that multiple first output lines 1152 transmit
Identical, wavelength is related with the frequency of millimeter wave.When the phase difference for the millimeter wave that the first adjacent output line 1152 transmits is θ,
Then the length difference l1 of the first adjacent output line 1152 is：Wherein, λgFor the wave of millimetre-wave radar system transmitting
The wavelength that beam is propagated in the first output line 1152.When the phase difference of the first adjacent output line 1152 is θ, the first transmitting antenna
The deflection angle of the maximum gain direction of array 113, i.e., the first deflection angle c are：Wherein, λ0It is
The wavelength that the wave beam of millimetre-wave radar system transmitting is propagated in air, between d1 is between the first adjacent output line 1152
Away from.It follows that in the first transmitting antenna array 113 first deflection angle c and adjacent first output line 1152 length difference it
Between relationship be：Therefore, after the completion of the design of millimetre-wave radar system, working frequency and multiple
The material of first output line 1152 is it has been determined that so λ0And λgValue be definite value.At this point it is possible to defeated by adjusting adjacent first
Length difference between outlet 1152 adjusts the first deflection angle c of the first transmitting antenna array 113 so that the first launching antenna array
The maximum gain direction of row 113 is in the first gain direction x1 or the second gain direction x2.
The operation principle of second feeding network 116 is identical as the operation principle of the first feeding network 115, no longer superfluous herein
It states.Relationship in second transmitting antenna array 114 between the second deflection angle d and length difference l2 of adjacent second output line 1162
For：Wherein, d2 is the spacing of two adjacent the second output lines 1162.Therefore, tune can be passed through
Save the second deflection angle d that the length difference l2 between adjacent second output line 1162 adjusts the second transmitting antenna array 114 so that
The maximum gain direction of second transmitting antenna array 114 is in the second gain direction x2 or the first gain direction x1.
Based on the above technical solution, the first transmitting antenna array 113 and the second transmitting antenna array 114 is single-row
Antenna it is equal in number in or be more than 2.
When the single-row antenna of the first transmitting antenna array 113 and the second transmitting antenna array 114 it is equal in number in or it is big
When 2, the quantity of the first output line 1152 of the first feeding network 115 and the second output line 1162 of the second feeding network 116
It is equal to or is more than 2, then multiple the of 1152 and second feeding network 116 of multiple first output lines of the first feeding network 115
Length difference may be implemented in two output lines 1162, so as to adjust the first transmitting antenna array 113 and the second launching antenna array
The maximum gain direction of row 114.
On the basis of the various embodiments described above, radar chip 111 is for the first transmitting antenna array of Time-sharing control 113 and the
Two transmitting antenna arrays 114 emit signal.First maximum gain is the maximum gain of the first transmitting antenna array 113, and second most
Large gain is the maximum gain of the second transmitting antenna array 114.
Specifically, radar chip 111 controls the first transmitting antenna array 113 and 114 timesharing of the second transmitting antenna array is handed over
The transmitting signal replaced.Illustratively, in one cycle, the first stage, the first transmitting antenna array 113 transmitting signal, and
First gain direction x1 has maximum gain on (direction for being biased to the first deflection angle c of first direction x), can be first
The side of 110 corresponding vehicle of angle radar detects farther distance；Second stage, the second transmitting antenna array 114 emit signal, and
There is maximum gain on the second gain direction x2 (direction for being biased to the second deflection angle d of first direction x), it can be in vehicle
Rear detect farther distance.At this point, the first maximum gain is the maximum gain of the first transmitting antenna array 113, second most
Large gain is the maximum gain of the second transmitting antenna array 114.
Fig. 7 is a kind of gain schematic diagram of the horizontal direction of transmitting antenna array provided in an embodiment of the present invention, such as Fig. 7 institutes
Show, illustratively, with first direction x for 0 °, is counterclockwise rotated for positive direction.In first transmitting antenna array 113 with volume
Number it is 0 °, 140 ° and 280 ° respectively for 1,2 and 3 phase of 1152 corresponding single-row antenna of the first output line, phase difference is
140°.In the figure 7, abscissa is the angle for being positive direction deviation first direction x in a counterclockwise direction, and ordinate is horizontally oriented
Gain.X rotates 20-30 ° to the gain curve 1131 of the horizontal direction of first transmitting antenna array 113 counterclockwise in a first direction
Nearby there is maximum gain.Similarly, corresponding with the second output line 1162 that number is 4,5 and 6 in the second transmitting antenna array 114
The phase of single-row antenna be 280 °, 140 ° and 0 ° respectively, phase difference is -140 °, the level side of the second transmitting antenna array 114
To gain curve 1141 in a first direction x rotate clockwise 20-30 ° nearby have maximum gain.
Fig. 8 is a kind of gain schematic diagram of the horizontal direction of first jiao of radar provided in an embodiment of the present invention, in a week
In phase, first stage, the first transmitting antenna array 113 first works, and detects the side of first jiao of 110 corresponding vehicle of radar
Environment；Second stage, the second transmitting antenna array 114 work, and detect the rear of first jiao of 110 corresponding vehicle of radar
Environment, it follows that first jiao of radar 110 can detect first jiao of 110 corresponding vehicle of radar in one cycle
The farther distance in side, and the farther distance in rear of energy probe vehicles, therefore set not increasing automobile-used millimeter wave angle radar system
Reach the more remote purpose in rear and side of detection speed while the complexity of meter, and improves automobile-used millimeter wave
The integrated level of angle radar system reduces the cost of automobile-used millimeter wave angle radar system.
On the basis of the various embodiments described above, second jiao of radar 120 is identical with first jiao of 110 structure of radar.
Specifically, in order to improve detection range of second jiao of radar 120 to the side of second jiao of 120 corresponding vehicle of radar,
The structure that second jiao of radar 120 can be designed is identical as the structure of first jiao of radar 110.To realize both sides and rear to vehicle
The detection of more remote environment.
With continued reference to Fig. 2, on the basis of above-mentioned each embodiment, adjacent two lists row day in receiving antenna array 112
The distance between line is equal or unequal.
When the distance between adjacent single-row antenna is equal, receiving antenna array 112 is uniformly distributed；Adjacent single-row antenna
The distance between it is unequal when, receiving antenna array 112 can be arranged, and in Taylor's distribution, (spacing of single-row antenna is in Taylor point
Cloth).The secondary lobe for the millimeter wave that the receiving antenna array 112 of Taylor's distribution transmits is passed than equally distributed receiving antenna array 112
The secondary lobe of defeated millimeter wave is low, therefore the receiving antenna array 112 of Taylor's distribution inhibits the effect of secondary lobe more preferable, receiving antenna array
Noise is smaller when the distance between adjacent two lists array antenna is unequal in row 112.
With continued reference to Fig. 2, on the basis of above-mentioned each embodiment, first jiao of radar 110 further includes dielectric substrate 117；
Radar chip 111 is fixed on a side surface of dielectric substrate 117, receiving antenna array 112,113 and of the first transmitting antenna array
Second transmitting antenna array 114 is printed on dielectric substrate 117, and is in same side with radar chip 111.
Note that above are only presently preferred embodiments of the present invention and institute's application technology principle.It will be appreciated by those skilled in the art that
The present invention is not limited to specific embodiments described here, can carry out for a person skilled in the art it is various it is apparent variation,
It readjusts and substitutes without departing from protection scope of the present invention.Therefore, although being carried out to the present invention by above example
It is described in further detail, but the present invention is not limited only to above example, without departing from the inventive concept, also
May include other more equivalent embodiments, and the scope of the present invention is determined by scope of the appended claims.
Claims (11)
1. a kind of automobile-used millimeter wave angle radar system, which is characterized in that including first jiao of radar and second jiao of radar, described first
Angle radar and second jiao of radar are respectively arranged at the both ends of the tailstock, and first jiao of radar has in plane and vehicle body
First angle, second jiao of radar have the second angle in plane and the vehicle body；
In the horizontal plane, at least described first jiao of radar has the first maximum gain and the second maximum gain；
There is the first deflection angle, and described first increases between the first gain direction and first direction of first maximum gain
The side of the corresponding vehicle of first jiao of radar is biased in beneficial direction, the second gain direction of second maximum gain and described the
There is the second deflection angle, and second gain direction is biased to the rear of the vehicle between one direction, wherein the first party
To vertical in plane with first jiao of radar.
2. automobile-used millimeter wave angle radar system according to claim 1, which is characterized in that second jiao of radar has the
Three maximum gains and the 4th maximum gain；
There is third to deflect angle, and the third increases between the third gain direction and second direction of the third maximum gain
The side of the corresponding vehicle of second jiao of radar is biased in beneficial direction, the 4th gain direction of the 4th maximum gain and described the
There is quadrupole deflector angle, and the 4th gain direction is biased to the rear of the vehicle between two directions, wherein the second party
To vertical in plane with second jiao of radar.
3. automobile-used millimeter wave angle radar system according to claim 1, which is characterized in that first angle and described
Two angles are equal, and the first deflection angle and the second deflection angle are equal.
4. automobile-used millimeter wave angle radar system according to claim 3, which is characterized in that the second deflection angle and institute
It is equal to state the first angle.
5. according to the automobile-used millimeter wave angle radar system of claim 1-4 any one of them, which is characterized in that first jiao of thunder
Up to including radar chip, receiving antenna array, the first transmitting antenna array and the second transmitting antenna array；First transmitting day
Linear array is connect by the first feeding network with the radar chip, and second transmitting antenna array passes through the second feeding network
It is connect with the radar chip；
First feeding network includes the first input line and multiple first output lines, first input line and multiple described the
One output line is connected by the first intermediate node；First output end of the input terminal of first input line and the radar chip
Connection, multiple first output lines connect one to one with the single-row antenna in first transmitting antenna array respectively, more
The length of a first output line is different；
Second feeding network includes the second input line and multiple second output lines, second input line and multiple described the
Two output lines are connected by the second intermediate node；The second output terminal of the input terminal of second input line and the radar chip
Connection, multiple second output lines connect one to one with the single-row antenna in second transmitting antenna array respectively, more
The length of a second output line is different.
6. automobile-used millimeter wave angle radar system according to claim 5, which is characterized in that multiple first output lines are pressed
Length sorts, the relationship that the length difference l1 and spacing d1 of adjacent two first output lines deflect angle c with described first
It is
Multiple second output lines are sorted-by-length, the length difference l2 and spacing d2 of two adjacent second output lines with
The relationship of the first deflection angle d is
Wherein, λ0It is the wavelength that the wave beam of the millimetre-wave radar system transmitting is propagated in air, λgIt is the millimetre-wave radar
The wavelength that the wave beam of system transmitting is propagated in first output line.
7. automobile-used millimeter wave angle radar system according to claim 5, which is characterized in that the radar chip is used for timesharing
Control first transmitting antenna array and second transmitting antenna array transmitting signal；
First maximum gain is the maximum gain of first transmitting antenna array, and second maximum gain is described the
The maximum gain of two transmitting antenna arrays.
8. automobile-used millimeter wave angle radar system according to claim 5, which is characterized in that second jiao of radar and described
First jiao of radar arrangement is identical.
9. automobile-used millimeter wave angle radar system according to claim 8, which is characterized in that first transmitting antenna array
With the single-row antenna of second transmitting antenna array it is equal in number in or be more than 2.
10. automobile-used millimeter wave angle radar system according to claim 8, which is characterized in that in the receiving antenna array
The distance between adjacent two lists array antenna is equal or unequal.
11. automobile-used millimeter wave angle radar system according to claim 5, which is characterized in that first jiao of radar also wraps
Include dielectric substrate；
The radar chip is fixed on a side surface of the dielectric substrate, the receiving antenna array, the first launching antenna array
Row and the second transmitting antenna array are printed on the dielectric substrate, and are in same side with the radar chip.
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| CN201810247532.3A CN108445478A (en) | 2018-03-23 | 2018-03-23 | A kind of automobile-used millimeter wave angle radar system |
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| CN201810247532.3A CN108445478A (en) | 2018-03-23 | 2018-03-23 | A kind of automobile-used millimeter wave angle radar system |
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