CN106257303B - Radar and method for switching enabling array antenna - Google Patents
Radar and method for switching enabling array antenna Download PDFInfo
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- CN106257303B CN106257303B CN201510333702.6A CN201510333702A CN106257303B CN 106257303 B CN106257303 B CN 106257303B CN 201510333702 A CN201510333702 A CN 201510333702A CN 106257303 B CN106257303 B CN 106257303B
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- 238000000034 method Methods 0.000 title claims abstract description 30
- 238000003491 array Methods 0.000 claims 39
- 230000004888 barrier function Effects 0.000 description 10
- 230000005855 radiation Effects 0.000 description 10
- 238000010586 diagram Methods 0.000 description 7
- 210000004209 hair Anatomy 0.000 description 5
- 230000004044 response Effects 0.000 description 3
- 238000001514 detection method Methods 0.000 description 2
- 239000011159 matrix material Substances 0.000 description 2
- 230000010363 phase shift Effects 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 1
- 238000005034 decoration Methods 0.000 description 1
- 230000001066 destructive effect Effects 0.000 description 1
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- 230000010287 polarization Effects 0.000 description 1
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Classifications
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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
-
- 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
- G01S7/00—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00
- G01S7/02—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S13/00
- G01S7/42—Diversity systems specially adapted for radar
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q3/00—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system
- H01Q3/24—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system varying the orientation by switching energy from one active radiating element to another, e.g. for beam switching
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- Engineering & Computer Science (AREA)
- Radar, Positioning & Navigation (AREA)
- Remote Sensing (AREA)
- Computer Networks & Wireless Communication (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Variable-Direction Aerials And Aerial Arrays (AREA)
- Radar Systems Or Details Thereof (AREA)
Abstract
一种雷达及切换致能阵列天线的方法。该雷达包括：一收发器、一多发多收阵列天线、一相位阵列天线以及一控制单元；该多发多收阵列天线耦接该收发器，包括多个第一发射子阵列及多个接收子阵列；该相位阵列天线耦接该收发器，包括多个第二发射子阵列以及该些接收子阵列；该控制单元耦接至该收发器，经配置以切换致能该些第一发射子阵列以致能该多发多收阵列天线，或切换致能该些第二发射子阵列以致能该相位阵列天线。本发明提供的一种同时包括MIMO阵列天线以及相位阵列天线的雷达，可同时具备这两种阵列天线的优点。并且，本发明提出的切换致能阵列天线的方法，可因应于当下的情境致能较合适的阵列天线。
A radar and a method for switching an array antenna. The radar includes: a transceiver, a multi-transmit multi-receive array antenna, a phased array antenna, and a control unit; the multi-transmit multi-receive array antenna is coupled to the transceiver, including a plurality of first transmitting subarrays and a plurality of receiving subarrays; the phased array antenna is coupled to the transceiver, including a plurality of second transmitting subarrays and the receiving subarrays; the control unit is coupled to the transceiver, and is configured to switch and enable the first transmitting subarrays to enable the multi-transmit multi-receive array antenna, or to switch and enable the second transmitting subarrays to enable the phased array antenna. The present invention provides a radar that includes both a MIMO array antenna and a phased array antenna, which can have the advantages of both array antennas. Moreover, the method for switching and enabling an array antenna proposed in the present invention can enable a more suitable array antenna according to the current situation.
Description
Technical field
The present invention relates to a kind of methods of radar and switching enable (switching to enable) array antenna.
Background technique
Array antenna is the antenna system that multiple identical antennas rearrange according to certain rules, is widely used in thunder
Up in system, such as microwave/millimeter wave radar system.In well-known technique, aerial array can be realized as multiple-input multiple-output (Multiple
Input Multiple Output, MIMO) array antenna or phased array (Phased Array) antenna form.
In well-known technique, MIMO array antenna can transmit signal by the mode of sending time is for example postponed.Also,
Poor by selection sending time appropriate, the receiving end of MIMO array antenna can recognize the letter of the reflection from different barriers
Number.In addition, MIMO array antenna can also form new virtual array antenna (Virtual by the difference of antenna placement position
Array Antenna), and then improve angular resolution (Angular Resolution).
On the other hand, phased array antenna is then small antenna element (the commonly referred to as phase shift using a large amount of independent controls
Device) it is arranged in antenna array, and the main wave of out of phase (direction) is synthesized by the time difference for controlling each antenna element transmitting
Valve.Specifically, the electromagnetic wave of each phase shifter transmitting of phased array antenna is strengthened with constructive interference and synthesizes one close to straight
Radar main lobe, and minor lobe then substantially lowers due to destructive interference.When phased array antenna operates, control system can
Required lobe direction is sent to the lobe control unit of rear end.Then, lobe control unit can calculate each phase shift accordingly
The time of device transmitting electromagnetic wave simultaneously assigns instruction to phase shifter, so that the electromagnetic wave of each phase shifter transmitting interferes and forms institute
The lobe needed.Due to can produce the main lobe of higher gain, the accessible detecting distance of phased array is also longer.
Although MIMO array antenna and phased array antenna angled high resolution and long detecting distance individually is excellent
Point, but for reverse side, MIMO array antenna and phased array antenna also have individually short detecting distance and angular resolution low
Disadvantage.Therefore, if being bound to can be effective if capable of integrating above two aerial array and allowing it machine plays effect in due course individually
The performance of ground promotion detections of radar.
Accordingly, it is desirable to provide a kind of radar and switching the method for enable array antenna and meeting the demand.
Summary of the invention
In view of this, the present invention provides radar that is a kind of while including MIMO array antenna and phased array antenna,
The advantages of both array antennas can be provided simultaneously with.Also, the method that the present invention also proposes switching enable array antenna, can be because
The appropriate array antenna of the situation enable of Ying Yu instantly.
The present invention provides a kind of radar, which includes a transceiver, a multiple-input multiple-output array antenna, a phased array day
Line and a control unit；The multiple-input multiple-output array antenna couples the transceiver, including multiple first transmitting subarrays and multiple
Receive subarray；The phased array antenna couples the transceiver, including multiple second transmitting subarrays and those reception submatrixs
Column；The control unit is coupled to the transceiver, be configured to switching enable those first transmitting subarrays with enable this is multiple more
Receive array antenna, or switching enable those second transmitting subarrays with the enable phased array antenna.
The present invention provides a kind of method for switching enable array antenna, is suitable for including multiple-input multiple-output array antenna and phase
Control unit in the radar of array antenna.The described method includes: judging whether that global positioning system (GPS) signal can be obtained；
If so, judging whether radar is located in specific road section according to global positioning system signal；If so, switching enable the multiple second
Emit subarray with enable phased array antenna.
The present invention provides a kind of method for switching enable array antenna, and this method is applied to a radar, which includes one
Multiple-input multiple-output array antenna, a phased array antenna and a control unit, which comprises judge whether to obtain one entirely
Ball positioning system signal；If so, judging whether the radar is located in a specific road section according to the global positioning system signal；If
It is that those the second transmitting subarrays of switching enable are with the enable phased array antenna.
Based on above-mentioned, the radar that the embodiment of the present invention proposes is configured with MIMO array antenna and phased array day simultaneously
Line, thus can have the advantages that both array antennas simultaneously, and then improving only includes the known of one of array antenna
The shortcomings that radar.In addition, whether method proposed by the present invention can be according to can obtain the movement speed of GPS signal and/or radar and be
It is no to be greater than predetermined threshold value to switch enable MIMO array antenna or phased array antenna, it is thus possible to allow radar in response in various
Different situations is detected using more suitable array antenna.
To make the foregoing features and advantages of the present invention clearer and more comprehensible, special embodiment below, and it is attached appended by cooperation
Figure is described in detail below.
Detailed description of the invention
Fig. 1 is the radar schematic diagram that an embodiment according to the present invention is painted.
Fig. 2 is the radar schematic diagram that an embodiment according to the present invention is painted.
Fig. 3 is the virtual array antenna radiation pattern figure being painted according to Fig. 2 embodiment.
Fig. 4 is the antenna radiation patterns of the second transmitting subarray in the phased array antenna being painted according to Fig. 2 embodiment
Figure.
Fig. 5 is the antenna radiation patterns figure for the multiple reception subarrays being painted according to Fig. 2 and Fig. 4 embodiment.
Fig. 6 is two-way (two-way) field pattern figure that an embodiment according to the present invention is painted.
Fig. 7 is the method for the switching enable array antenna that an embodiment according to the present invention is painted.
Fig. 8 A be an embodiment according to the present invention be painted detect other vehicles when radar is located at specific road section
Schematic diagram.
Fig. 8 B be according to Fig. 8 A embodiment be painted showing for other vehicles is detected when radar is not located at specific road section
It is intended to.
Primary clustering symbol description:
100,200,810 radar
110,210 transceiver
120,220 MIMO array antenna
130,230 phased array antenna
140,240 control unit
800,820~860 vehicle
D1 first distance
D2 second distance
D3 third distance
The first patch antenna of PA1
The second patch antenna of PA2
PC1, PC2 phase center
R1~R8 receives subarray
RX1~RX16, TX1~TX4, field pattern
RX1 '~RX8 ', RX1 "~RX8 ",
815、815’
S710~S750 step
T1_1, T1_2 first emits subarray
T2_1~T2_4 second emits subarray
Specific embodiment
Fig. 1 is the radar schematic diagram that an embodiment according to the present invention is painted.In the present embodiment, radar 100 is, for example,
The radar of Vehicle radar, military radar or other similar purposes, but can be without being limited thereto.Radar 100 include transceiver 110,
MIMO array antenna 120, phased array antenna 130 and control unit 140.Transceiver 110 may include transmitter circuit, receive
Device circuit, analog-to-digital (analog-to-digital, A/D) converter, digital revolving die it is quasi- (digital-to-analog,
D/A) converter, low-noise amplifier (low noise amplifier, LNA), mixer, filter, match circuit, transmission
The components such as line, power amplifier (power amplifier, PA) and/or locally-stored medium, are intended to handle by MIMO gusts
The signal that array antenna 120 and phased array antenna 130 emit, or via MIMO array antenna 120 and phased array day
130 received signal of line.
MIMO array antenna 120 can for example be realized as butler matrix (Butler matrix) or other similar waves
Beam shaping aerial array, but can be without being limited thereto.MIMO array antenna 120 includes the first transmitting submatrix for being coupled to transceiver 110
It arranges T1_1, T1_2, receive subarray R1 and R2.Phased array antenna 130 includes the second transmitting submatrix for being coupled to transceiver 110
It arranges T2_1, T2_2, receive subarray R1 and R2.In the present embodiment, MIMO array antenna 120 and phased array antenna 130
Can emit the signal for detecting barrier by respective transmitting subarray, and share receive subarray R1 and R2 receive from
The signal of barrier reflection, but can be without being limited thereto.Further, since MIMO array antenna 120 include two transmitting subarray T1_1,
T1_2, two receptions subarray R1 and R2, therefore may be simply referred to as the MIMO array antenna of 2X2 (i.e. 2 hairs 2 are received).Based on similar original
Then, phased array antenna 130 is the phased array antenna that may be simply referred to as 2X2.
The control unit 140 for being coupled to transceiver 110 is, for example, general service processor, special purpose processors, tradition
Processor, digital signal processor, multi-microprocessor (microprocessor), at one or more combined digital signal
Manage microprocessor, controller, microcontroller, special application integrated circuit (the Application Specific of device core
Integrated Circuit, ASIC), field programmable gate array (Field Programmable Gate Array,
FPGA), the integrated circuit, state machine of any other type, be based on advanced reduced instruction set machine (Advanced RISC
Machine, ARM) processor and similar product.In the present embodiment, control unit 140 for example can access hard disk or memory
In equal storage elements (not being painted) stored program code, software or module come switch enable first emit subarray T1_1 and
T1_2 emits subarray T2_1 and T2_2 with enable MIMO array antenna 120, or switching enable second with enable phased array day
Line 130, details will be illustrated in length later.It will first be directed to the various possible implementations of 100 structure of radar below
Mode is introduced.
As shown in Figure 1, first transmitting subarray T1_1, T1_2, the second transmitting subarray T2_1 and T2_2 are configured in receipts
Send out the first side (e.g. left side) of device 110, and receive subarray R1 and R2 be configured in transceiver 110 second side (such as
It is right side).In the present embodiment, first side is relative to described second side, but in other embodiments, enough in space
In the case of, first transmitting subarray T1_1, T1_2, second transmitting subarray T2_1, T2_2, reception subarray R1 and R2 can also match
It is placed in the same side.In addition, first transmitting subarray T1_1, T1_2, second transmitting subarray T2_1, T2_2, reception subarray R1
And R2 can also be configured at upside, downside, left side and right side in response to the pin configuration in transceiver 110, but it is of the invention can be real
It is without being limited thereto to apply mode.
In the present embodiment, first transmitting subarray T1_1, T1_2, the second transmitting subarray T2_1 and T2_2 do not include
It is arranged as multiple first patch antennas (patch antenna) PA1 of straight line, and receive subarray R1 and R2 Bao Kuo not arrange
For multiple second patch antenna PA2 of straight line.First patch antenna PA1 is for example depicted as having various sizes of multiple black
Pane, and the second patch antenna PA2 is then for example depicted as having various sizes of multiple white panes, but its only to
Illustrate and is not intended to limit the invention possible embodiment.
In the radar 100 of Fig. 1, first transmitting subarray T1_1, T1_2, the second transmitting subarray T2_1 and T2_2 can be put down
Row is arranged in the first plane, and the phase of each first transmitting subarray T1_1, T1_2, each second transmitting subarray T2_1 and T2_2
Position center (phase center) can be in alignment with each other.In the present embodiment, due to each first transmitting subarray T1_1, T1_2, each
It is set as 10 to the quantitative example of first patch antenna PA1 included by second transmitting subarray T2_1 and T2_2, therefore on
The phase center for stating each transmitting subarray is all located at from left number to come between the 5th and the 6th the first patch antenna PA1, that is,
Among maximum two black rectangles.By taking the first transmitting subarray T1_1 as an example, phase center PC1 is located at Fig. 1 and is marked
Show place.In addition, receiving subarray R1 and R2 can be parallel in the second plane, and in each phase for receiving subarray R1 and R2
The heart (such as phase center PC2) can also be in alignment with each other.
In the present embodiment, the first transmitting subarray T1_1 and T1_2 D1, and adjacent reception submatrix away from the first distance
Arrange R1 and R2 D2 away from the second distance.It is analyzed to allow MIMO array antenna 120 that can be considered as virtual array antenna, first
Distance D1 may be designed as 8 times of second distance D2, but can be without being limited thereto.In the case, the MIMO array antenna 120 of 2X2 can
The virtual array antenna of 1X4 is considered to be to analyze.Further, since first transmitting subarray T1_1 and T1_2 it is apart compared with
Far, the second transmitting subarray T2_1 and T2_2 is configured between the first transmitting subarray T1_1 and T1_2, with substantially more
Utilize the circuit area of radar 100.In addition, the second transmitting subarray T2_1 and T2_2 can be at a distance of third distance D3.
For another viewpoint, analyzed to allow well known MIMO array antenna that can be considered as virtual array antenna, if
Meter person will be designed as the distance between transmitting subarray to receive 8 times of distance between subarray.In the case, virtually
It will lead to lower circuit area utilization rate.However, the structure proposed through the embodiment of the present invention, in addition to radar 100 can be improved
Circuit area utilization rate except, the advantages of also radar 100 being allowed to be provided simultaneously with MIMO array antenna and phased array antenna.
In other embodiments, radar proposed by the present invention can also be realized as with more multi-emitting subarray and reception
The form of array.Referring to figure 2., Fig. 2 is the radar schematic diagram that an embodiment according to the present invention is painted.In the present embodiment,
Radar 200 includes transceiver 210, MIMO array antenna 220, phased array antenna 230 and control unit 240.MIMO array
Antenna 220 includes being coupled to first transmitting subarray T1_1~T1_2 of transceiver 210 and receiving subarray R1~R8.Phase
Array antenna 230 includes being coupled to second transmitting subarray T2_1~T2_4 of transceiver 110 and receiving subarray R1~R8.It changes
Yan Zhi, MIMO array antenna 220 are, for example, the MIMO array antenna of 2X8 (that is, 2 hair 8 receive), and the then example of phased array antenna 230
The phased array antenna of 4X8 (that is, 4 hairs 8 are received) in this way.
In the present embodiment, two D1, and reception away from the first distance in first transmitting subarray T1_1~T1_2
Adjacent two reception subarrays D2 away from the second distance in array R1~R8.As mentioned in Fig. 1 embodiment, in order to allow
MIMO array antenna 220 can be considered as virtual array antenna to analyze, and first distance D1 may be designed as the 8 of second distance D2
Times.In the case, the virtual array antenna that the MIMO array antenna 220 of 2X8 can be considered to be 1X16 (that is, 1 hair 16 is received) comes
Analysis.Further, since the first transmitting subarray T1_1 and T1_2 is apart farther out, second transmitting subarray T2_1~T2_4 can
It is configured between the first transmitting subarray T1_1 and T1_2, substantially more to utilize the circuit area of radar 200.Compared to figure
Aspect shown in 1, the structure that Fig. 2 embodiment is proposed can further improve the circuit area utilization rate of radar 100.
It is similar to the control unit 140 of Fig. 1, the equally changeable cause of control unit 240 of transceiver 210 is coupled in Fig. 2
Energy first emits subarray T1_1~T1_2 and emits subarray T2_1 with enable MIMO array antenna 220, or switching enable second
~T2_4 is with enable phased array antenna 230.In other words, radar 200 can equally be provided simultaneously with MIMO array antenna and phase
The advantages of array antenna.
Referring to figure 3., Fig. 3 is the virtual array antenna radiation pattern figure being painted according to Fig. 2 embodiment.As mentioned in Fig. 2
And, MIMO array antenna 220 can be considered to be the virtual array antenna of 1X16 to analyze, and 16 of this virtual array antenna
Receiving antenna patterns illustrated corresponding to subarray is, for example, field pattern RX1~RX16 depicted in Fig. 3.It can be seen that from Fig. 3,
Angle is that there are about 16 apparent main lobes (that is, the lobe indicated with stain) between -60 to+60.
Referring to figure 4., Fig. 4 is the day of the second transmitting subarray in the phased array antenna being painted according to Fig. 2 embodiment
Beta radiation field pattern figure.In the present embodiment, field pattern TX1~TX4 is, for example, the second hair when phased array 230 is enabled respectively
Penetrate the antenna patterns illustrated of subarray T2_1~T2_4.Emit subarray T2_1~T2_4 here with horizontal polarization second, and can be by
Adjustment antenna radiation patterns and inhibition minor lobe are output phase to by the second transmitting of change subarray T2_1~T2_4.Such one
Come, multiple lobes on the horizontal level can be realized and increase antenna gain.Further, since the second transmitting subarray T2_1~
T2_4 emits simultaneously, thus changeable scanning angle, and then is promoted and use upper flexibility ratio.It is foundation referring again to Fig. 5, Fig. 5
The antenna radiation patterns figure for multiple reception subarrays that Fig. 2 and Fig. 4 embodiment is painted.In the present embodiment, field pattern RX1 '~
RX8 ' is, for example, to receive the antenna patterns illustrated of subarray R1~R8 when phased array 230 is enabled respectively.It is connect herein by change
It receives that subarray R1~R8 receives the size of signal and required phase adjusts antenna patterns illustrated and inhibits minor lobe, and then reaches
More wide scanning range and higher antenna gain on horizontal plane.
Fig. 6 is please referred to, Fig. 6 is the two-way field pattern figure that an embodiment according to the present invention is painted.In the present embodiment, field pattern
RX1 "~RX8 " is, for example, the antenna radiation patterns figure for incorporating the second transmitting subarray and receiving subarray respectively.It can from Fig. 6
Find out that there is apparent main lobe between 0 degree to 20 degree, this represents the radiation that can emit subarray by selection second
Field pattern optimizes antenna radiation patterns and antenna gain, and then increases detecting distance and signal-to-noise ratio.
As previously mentioned, control unit 140 is such as can be in storage element (not being painted) access hard disk or memory
Stored program code, software or module emits subarray T1_1 and T1_2 to switch enable first with enable MIMO array day
Line 120, or switching enable second emit subarray T2_1 and T2_2 with enable phased array antenna 130.It will carry out below detailed
Explanation.
Fig. 7 is the method for the switching enable array antenna that an embodiment according to the present invention is painted.What the present embodiment proposed
Method can be executed by the radar 100 of Fig. 1, below be each element of collocation Fig. 1 to illustrate the details of each step.For the ease of
Illustrate the concept of the present embodiment, it is assumed hereinafter that radar 100 is configured at the surrounding of vehicle, to detect other vehicles of vehicle periphery
Or barrier, but the possible embodiment of the present invention is not limited to that.
Firstly, control unit 140 can determine whether that GPS signal can be obtained in step S710.If so, control unit
140 can judge whether radar 100 is located in specific road section according to GPS signal in step S720.In various embodiments, institute
Stating specific road section can be highway, through street or the less road (such as interstate highway) of vehicle flowrate, but can be unlimited
In this.If control unit 140 judges that radar 100 is located in specific road section, this represents other traffic of the vehicle and surrounding
Tool or barrier potential range farther out, thus can switch the second subarray of enable T2_1~T2_2 successively in step S730
With enable phased array antenna 130.In this way, which radar 100 can be detected farther away barrier or other vehicles.
However, this represents thunder if control unit 140 judges that radar 100 is not located in specific road section in step S720
The region in urban district or other vehicle flowrate comparatively denses is likely located at up to 100 and the vehicle.Therefore, control unit 140 can be connected at
Switch enable the first subarray T1_1~T1_2 in step S740 with enable MIMO array antenna 120.In this way, radar 100
Can higher angular resolution accurately detect other vehicles or barrier of surrounding.
On the other hand, if control unit 140 judges in step S710 can not obtain GPS signal, it is single that this represents control
Member 140 possible (temporary) can not determine the array antenna of enable to be switched according to the place where radar 100 and the vehicle.
Therefore, in step S750, control unit 140 can determine whether that the movement speed (that is, movement speed of the vehicle) of radar 100 is
It is no to be greater than predetermined threshold value.The predetermined threshold value is, for example, the road speed limit (such as 40 kilometers of speed per hour) of general urban road,
But it can be without being limited thereto.In the case, if the movement speed of radar 100 is greater than the road speed limit, this represents radar 100 can
The less intensive highway of vehicle flowrate, through street or interstate highway etc. can be located at, therefore control unit 140 can be in step
Switch enable the second subarray T2_1~T2_2 in S730 with enable phased array antenna 130.In this way, radar 100
Detect farther away barrier or other vehicles.
However, i.e. representing the vehicle is likely located at wagon flow for this if the movement speed of radar 100 is not more than predetermined threshold value
More intensive urban road is measured, therefore control unit 140 can switch the first subarray of enable T1_1~T1_ in step S740
2 with enable MIMO array antenna 120.In this way, radar 100 can higher angular resolution come around accurately detecting
Other vehicles or barrier.
In other embodiments, the method that control unit 140 can periodically or non-periodically execute again Fig. 7, with adaptability
Ground determines the array antenna for being intended to enable according to GPS signal or radar 100 movement speed instantly.In addition, working as control unit
140 when judging that radar 100 is located at the specific road section, and control unit 140 can also further judge that the movement speed of radar 100 is
It is no to be greater than another predetermined threshold value.This another predetermined threshold value is, for example, on highway, through street or interstate highway
Average speed or other by the speed (such as 50 kilometers of speed per hour) of designer's sets itself, but can be without being limited thereto.In this situation
Under, if radar 100 or the vehicle that the judgement of control unit 140 is located at specific road section are just to be not more than another pre-determined threshold
When the speed of value is mobile, i.e. representative may there is a situation where traffic congestions for this.At this point, the first son of enable also can be switched in control unit 140
Array T1_1~T1_2 is with enable MIMO array antenna 120.In this way, radar 100 can higher resolution ratio come it is accurate
Other vehicles or barrier around ground detection.
In another embodiment, when control unit 140 switches enable MIMO array antenna 120, second can be disabled simultaneously
Subarray T2_1~T2_2 is to disable phased array antenna 130.On the contrary, when control unit 140 switches enable phased array day
Line 130 can disable first subarray T1_1~T1_2 simultaneously to disable MIMO array antenna 120.
Although those skilled in the art are it should be appreciated that only illustrate Fig. 7's by taking the radar of Fig. 1 100 as an example above
Details, but the method for Fig. 7 may be equally applied to that radar 200 shown in Fig. 2 is other same or similar radar.
Please refer to Fig. 8 A, Fig. 8 A be an embodiment according to the present invention be painted detect it when radar is located at specific road section
The schematic diagram of his vehicles.In the present embodiment, in place of radar 810 is for example configured in shown in Fig. 8 A, that is, vehicle 800
At the right lateral side tailstock.It can be seen that from Fig. 8 A, when vehicle 800 is located in the e.g. specific road section of highway, radar 810 can
Switch its phased array antenna (not being painted) of enable and other farther away traffic of detecting distance are come with the obvious field pattern 815 of main lobe
Tool (e.g. vehicle 820).
Referring again to Fig. 8 B, Fig. 8 B be according to Fig. 8 A embodiment be painted detect other when radar is not located at specific road section
The schematic diagram of the vehicles.In the present embodiment, when vehicle 800 is located at the place of the non-category specific road section such as urban road, thunder
It is more accurately examined up to 810 changeable enables its MIMO array antennas (not being painted) with the higher field pattern 815 ' of angular resolution
Ranging is from other closer vehicles (e.g. vehicle 830~860).
In conclusion the radar that the embodiment of the present invention proposes is configured with MIMO array antenna and phased array day simultaneously
Line, thus can have the advantages that both array antennas simultaneously, and then improving only includes the known of one of array antenna
The shortcomings that radar.In addition, being designed by structure appropriate, radar proposed by the present invention can more effectively use circuit area.
In addition, whether method proposed by the present invention can be according to can obtain the movement speed of GPS signal and/or radar and whether be greater than pre- gating
Limit value switches enable MIMO array antenna or phased array antenna, it is thus possible to allow the radar to make in response in a variety of different situations
It is detected with more suitable array antenna.
Although the present invention is disclosed as above with embodiment, it is not intended to limit the invention, any affiliated technology neck
Those of ordinary skill in domain should can make a little change and profit without departing from the spirit and scope of the present invention
Decorations, therefore protection scope of the present invention should regard subject to the range institute defender of appended claims.
Claims (12)
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| WO2018137133A1 (en) * | 2017-01-24 | 2018-08-02 | SZ DJI Technology Co., Ltd. | Systems and methods for radar control on unmanned movable platforms |
| CN108415001B (en) * | 2018-02-12 | 2022-06-17 | 深圳市镭神智能系统有限公司 | Photosensitive array for receiving reflected light spots of laser radar, receiving system and method |
| CN108627827B (en) * | 2018-03-22 | 2021-05-04 | 苏州速感智能科技有限公司 | Device and method for realizing millimeter wave radar wide-area long-distance target detection |
| CN108627828B (en) * | 2018-03-22 | 2021-05-04 | 苏州速感智能科技有限公司 | Method for detecting wide-area long-distance target of millimeter wave radar |
| CN108196255A (en) * | 2018-03-23 | 2018-06-22 | 加特兰微电子科技(上海)有限公司 | Millimeter wave radar system for vehicle |
| CN108919271A (en) * | 2018-03-23 | 2018-11-30 | 加特兰微电子科技(上海)有限公司 | A kind of millimetre-wave radar system |
| TWI698052B (en) * | 2018-11-23 | 2020-07-01 | 耀登科技股份有限公司 | High-frequency antenna device and antenna array thereof |
| CN112946582B (en) * | 2021-04-02 | 2024-04-19 | 华域汽车系统股份有限公司 | Antenna array based on vehicle-mounted MIMO radar and application method thereof |
| WO2023172200A2 (en) * | 2022-03-09 | 2023-09-14 | Agency For Science, Technology And Research | An array antenna and a method of generating circularly polarized beams |
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