CN106257303A - Radar and the method for switching enable array antenna - Google Patents
Radar and the method for switching enable array antenna Download PDFInfo
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- CN106257303A CN106257303A CN201510333702.6A CN201510333702A CN106257303A CN 106257303 A CN106257303 A CN 106257303A CN 201510333702 A CN201510333702 A CN 201510333702A CN 106257303 A CN106257303 A CN 106257303A
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- array antenna
- radar
- enable
- those
- subarray
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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
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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
- 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
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- 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
Abstract
A kind of radar and the method for switching enable array antenna.This radar includes: a transceiver, a MIMO array antenna, a phased array antenna and a control unit；This MIMO array antenna couples this transceiver, launches subarray and multiple reception subarray including multiple first；This phased array antenna couples this transceiver, launches subarray including multiple second and those receive subarray；This control unit is coupled to this transceiver, be configured to switch enable those first launch subarrays with this MIMO array antenna of enable, or switching enable those second launch subarrays with this phased array antenna of enable.A kind of radar simultaneously including MIMO array antenna and phased array antenna that the present invention provides, the advantage that both array antennas can be provided simultaneously with.Further, the method for the switching enable array antenna that the present invention proposes, can be in response to the array antenna appropriate in situation enable instantly.
Description
Technical field
The present invention relates to a kind of radar and the method for switching enable (switching to enable) array antenna.
Background technology
Array antenna is the antenna system that multiple identical antenna rearranges according to certain rules, and it is widely used in radar system
In system, such as microwave/millimeter wave radar system.In known technology, aerial array can be embodied as MIMO (Multiple Input
Multiple Output, MIMO) array antenna or the form of phased array (Phased Array) antenna.
In known technology, MIMO array antenna can be by such as postponing the mode of transmission time to transmit signal.Further,
Sending time difference by suitable selection, the receiving terminal of MIMO array antenna can be believed from the reflection of different barriers with identification
Number.Additionally, by the difference of antenna putting position, MIMO array antenna can also form new virtual array antenna
(Virtual Array Antenna), and then improve angular resolution (Angular Resolution).
On the other hand, phased array antenna is then to utilize a large amount of independent small antenna element (commonly referred to as phase shifter) controlled
It is arranged in antenna array, and synthesizes the main lobe of out of phase (sensing) by the time difference controlling the transmitting of each antenna element.
Specifically, the electromagnetic wave that phased array antenna each phase shifter launches is strengthened with constructive interference and synthesizes one close to straight thunder
Reaching main lobe, minor lobe then significantly lowers due to destructive interference.During phased array antenna running, its control system can be by
Required lobe points to the lobe control unit delivering to rear end.Then, lobe control unit can calculate each phase shifter accordingly
Launch the time of electromagnetic wave and the phase shifter is assigned instruction so that the electromagnetic wave that each phase shifter launches interferes and formed required
The lobe wanted.Owing to can produce the main lobe of higher gain, therefore the accessible detecting distance of phased array is the longest.
Although MIMO array antenna and the advantage of the high and long detecting distance of the indivedual angled resolution of phased array antenna,
But for reverse side, MIMO array antenna and phased array antenna have the most individually short detecting distance and low the lacking of angular resolution
Point.Therefore, if above two aerial array can be integrated and makes them indivedual if machine plays effect in due course, certainly will can be effective
Ground promotes the performance of detections of radar.
Accordingly, it is desirable to provide a kind of method of radar and switching enable array antenna meets the demand.
Summary of the invention
In view of this, the present invention provides a kind of radar simultaneously including MIMO array antenna and phased array antenna, its
The advantage that can be provided simultaneously with both array antennas.Further, the present invention also proposes the method switching enable array antenna, and it can
In response to the array antenna appropriate in situation enable instantly.
The present invention provides a kind of radar, and this radar includes a transceiver, a MIMO array antenna, a phased array antenna
And a control unit；This MIMO array antenna couples this transceiver, launches subarrays including multiple first and multiple connects
Receive subarray；This phased array antenna couples this transceiver, launches subarray including multiple second and those receive subarray；
This control unit is coupled to this transceiver, is configured to switch those the first transmitting subarrays of enable with this MIMO battle array of enable
Array antenna, or those the second transmitting subarrays of switching enable are with this phased array antenna of enable.
The present invention provides a kind of method switching enable array antenna, is suitable to include MIMO array antenna and phased array
Control unit in the radar of antenna.Described method includes: judge whether to obtain global positioning system (GPS) signal；
If so, judge whether radar is positioned in specific road section according to global positioning system signal；If so, switching enable the plurality of the
Two launch subarray with enable phased array antenna.
The present invention provides a kind of method switching enable array antenna, and the method is applied to a radar, and this radar includes that one is multiple
Receiving array antenna, a phased array antenna and a control unit, described method includes more: judge whether to obtain a whole world
Positioning system signal；If so, judge whether this radar is positioned in a specific road section according to this global positioning system signal；If so,
Those the second transmitting subarrays of switching enable are with this phased array antenna of enable.
Based on above-mentioned, the radar that the embodiment of the present invention proposes is configured with MIMO array antenna and phased array antenna simultaneously,
Thus can have the advantage of both array antennas, and then improve the known radar only including one of which array antenna simultaneously
Shortcoming.It addition, the method that proposes of the present invention can be according to whether whether obtaining the translational speed of gps signal and/or radar
Enable MIMO array antenna or phased array antenna is switched, it is thus possible to allow radar in response in respectively more than predetermined threshold value
Planting different situations uses the array antenna being more suitable for detect.
For the features described above of the present invention and advantage can be become apparent, special embodiment below, and the accompanying drawing appended by coordinating makees
Describe in detail as follows.
Accompanying drawing explanation
Fig. 1 is based on the radar schematic diagram that one embodiment of the invention illustrates.
Fig. 2 is based on the radar schematic diagram that one embodiment of the invention illustrates.
Fig. 3 is based on the virtual array antenna radiation pattern figure that Fig. 2 embodiment illustrates.
The antenna radiation patterns figure of the second transmitting subarray that Fig. 4 is based in the phased array antenna that Fig. 2 embodiment illustrates.
Fig. 5 is based on the antenna radiation patterns figure of multiple reception subarrays that Fig. 2 and Fig. 4 embodiment illustrates.
Fig. 6 is based on two-way (two-way) field pattern figure that one embodiment of the invention illustrates.
Fig. 7 is based on the method for the switching enable array antenna that one embodiment of the invention illustrates.
What Fig. 8 A was based on that one embodiment of the invention illustrates detects showing of other vehicles when radar is positioned at specific road section
It is intended to.
Fig. 8 B is based on the signal detecting other vehicles when radar is not positioned at specific road section that Fig. 8 A embodiment illustrates
Figure.
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 the first distance
D2 second distance
D3 the 3rd distance
PA1 the first patch antenna
PA2 the second patch antenna
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 launches subarray
T2_1～T2_4 second launches subarray
Detailed description of the invention
Fig. 1 is based on the radar schematic diagram that one embodiment of the invention illustrates.In the present embodiment, radar 100 e.g. car
With radar, military radar or the radar of other similar applications, but can be not limited to this.Radar 100 include transceiver 110,
MIMO array antenna 120, phased array antenna 130 and control unit 140.Transceiver 110 can include conveyer electricity
Road, acceptor circuit, analog-to-digital (analog-to-digital, A/D) transducer, numeral revolving die intend (digital-to-analog,
D/A) transducer, low-noise amplifier (low noise amplifier, LNA), mixer, wave filter, match circuit,
The assemblies such as transmission line, power amplifier (power amplifier, PA) and/or locally-stored medium, are intended to pass through in order to process
The signal that MIMO array antenna 120 and phased array antenna 130 are launched, or via MIMO array antenna 120
And the signal that phased array antenna 130 receives.
MIMO array antenna 120 such as can be embodied as butler matrix (Butler matrix) or other similar wave beam
Forming antenna array, but can be not limited to this.MIMO array antenna 120 includes the first transmitting being coupled to transceiver 110
Array T1_1, T1_2, reception subarray R1 and R2.Phased array antenna 130 includes be coupled to transceiver 110
Two launch subarray T2_1, T2_2, reception subarray R1 and R2.In the present embodiment, MIMO array antenna 120
And phased array antenna 130 by the transmitting of respective transmitting subarray for detecting the signal of barrier, and can share reception
Subarray R1 and R2 receives the signal from barrier reflection, but can be not limited to this.Additionally, due to MIMO array sky
Line 120 includes that two are launched subarray T1_1, T1_2, two reception subarray R1 and R2, therefore may be simply referred to as 2X2
The MIMO array antenna of (i.e. 22 receipts).Based on principle of similarity, phased array antenna 130 i.e. may be simply referred to as 2X2
Phased array antenna.
It is coupled to the control unit 140 e.g. general service processor of transceiver 110, special purpose processors, traditional
At processor, digital signal processor, multi-microprocessor (microprocessor), one or more combined digital signal
The reason microprocessor of device core, controller, microcontroller, ASIC (Application Specific Integrated
Circuit, ASIC), field programmable gate array (Field Programmable Gate Array, FPGA), appoint
What other kinds of integrated circuit, state machine, based on advanced reduced instruction set machine (Advanced RISC Machine,
ARM) processor and similar product.In the present embodiment, control unit 140 such as can access hard disk or memorizer etc.
Program code, software or module stored in storage element (not illustrating) launch subarray T1_1 to switch enable first
And T1_2 is with enable MIMO array antenna 120, or switching enable second launches subarray T2_1 and T2_2 with enable phase
Bit array antenna 130, its details will illustrate in length later.Below by first various for radar 100 structure
Possible embodiment is introduced.
As it is shown in figure 1, the first transmitting subarray T1_1, T1_2, the second transmitting subarray T2_1 and T2_2 are configured in
First side of transceiver 110 (e.g. left side), and receive subarray R1 and R2 and be configured in the of transceiver 110
Two sides (e.g. right side).In the present embodiment, described first side is relative to described second side, but in other embodiments,
In the case of space is enough, first launches subarray T1_1, T1_2, the second transmitting subarray T2_1, T2_2, reception
Subarray R1 and R2 can also be configured in the same side.It addition, first launches subarray T1_1, T1_2, the second transmitting submatrix
On the upside of row T2_1, T2_2, reception subarray R1 and R2 also can be configured in response to the pin configuration in transceiver 110,
Downside, left side and right side, but the embodiment of the present invention is not limited to this.
In the present embodiment, the first transmitting subarray T1_1, T1_2, the second transmitting subarray T2_1 and T2_2 are not wrapped
Include multiple first patch antenna (patch antenna) PA1 being arranged as straight line, and reception subarray R1 and R2 is not wrapped
Include the multiple second patch antenna PA2 being arranged as straight line.First patch antenna PA1 is e.g. schematically shown as having different size
Multiple black rectangles, it is rectangular that the second patch antenna PA2 is the most e.g. schematically shown as having various sizes of multiple white
Block, but it is only not limited to the embodiment that the present invention is possible in order to illustrate.
In the radar 100 of Fig. 1, first launches subarray T1_1, T1_2, the second transmitting subarray T2_1 and T2_2
Can be parallel in the first plane, and each first launch subarray T1_1, T1_2, each second launch subarray T2_1 and
The phase center (phase center) of T2_2 can be in alignment with each other.In the present embodiment, due to each first launch subarray T1_1,
T1_2, each second quantitative example ground launching the first patch antenna PA1 included by subarray T2_1 and T2_2 are set to
10, the phase center of the most above-mentioned each transmitting subarray is all positioned at and comes the 5th and the 6th first block sky from left number
Between line PA1, that is in the middle of two black rectangles of maximum.As a example by the first transmitting subarray T1_1, in its phase place
Heart PC1 is i.e. positioned at Fig. 1 institute marked position.Can be parallel in the second plane additionally, receive subarray R1 and R2, and
Each phase center (such as phase center PC2) receiving subarray R1 and R2 also can be in alignment with each other.
In the present embodiment, first launches subarray T1_1 and T1_2 first distance D1, and adjacent reception submatrix
Row R1 and R2 second distance D2.Divide to allow MIMO array antenna 120 can be considered virtual array antenna
Analysis, the first distance D1 may be designed as 8 times of second distance D2, but can be not limited to this.In the case, the MIMO of 2X2
Array antenna 120 can be considered to be the virtual array antenna of 1X4 and analyze.Additionally, due to first launches subarray T1_1
And T1_2 is apart farther out, second launch subarray T2_1 and T2_2 be configured in the first transmitting subarray T1_1 and
Between T1_2, substantially more to utilize the circuit area of radar 100.Additionally, second launches subarray T2_1 and T2_2
Can be at a distance of the 3rd distance D3.
For another viewpoint, analyze to allow known MIMO array antenna can be considered virtual array antenna, if
Meter person will be designed as receiving 8 times of the spacing of subarray the distance launched between subarray.In the case, invisible
Middle will cause relatively low circuit area utilization rate.But, the structure proposed by the embodiment of the present invention, except improving radar
Outside the circuit area utilization rate of 100, radar 100 also can be allowed to be provided simultaneously with MIMO array antenna and phased array antenna
Advantage.
In other embodiments, the radar that the present invention proposes also can be embodied as having more multi-emitting subarray and reception subarray
Form.Refer to Fig. 2, Fig. 2 and be based on the radar schematic diagram that one embodiment of the invention illustrates.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 the first transmitting subarray T1_1～T1_2 being coupled to transceiver 210 and receives submatrix
Row R1～R8.Phased array antenna 230 includes the second transmitting subarray T2_1～T2_4 being coupled to transceiver 110 and connects
Receive subarray R1～R8.In other words, the MIMO of MIMO array antenna 220 e.g. 2X8 (that is, 28 receipts)
Array antenna, the phased array antenna of phased array antenna 230 the most e.g. 4X8 (that is, 48 receipts).
In the present embodiment, first launches two first distances D1 in subarray T1_1～T1_2, and receives submatrix
Two reception subarray second distances D2 adjacent in row R1～R8.As mentioned by Fig. 1 embodiment, in order to allow
MIMO array antenna 220 can be considered virtual array antenna and analyze, and the first distance D1 may be designed as second distance
8 times of D2.In the case, the MIMO array antenna 220 of 2X8 can be considered to be 1X16 (that is, 1 16 receipts)
Virtual array antenna analyze.Additionally, due to the first transmitting subarray T1_1 and T1_2 is apart farther out, second
Penetrate subarray T2_1～T2_4 to be configured between the first transmitting subarray T1_1 and T1_2, substantially more to utilize thunder
Reach the circuit area of 200.Compared to aspect shown in Fig. 1, the structure that Fig. 2 embodiment is proposed can further improve radar
The circuit area utilization rate of 100.
Similar in appearance to the control unit 140 of Fig. 1, Fig. 2 is coupled to the same changeable cause of control unit 240 of transceiver 210
Energy the first transmitting subarray T1_1～T1_2 is with enable MIMO array antenna 220, or subarray is launched in switching enable second
T2_1～T2_4 is with enable phased array antenna 230.In other words, radar 200 can be provided simultaneously with MIMO array antenna equally
And the advantage of phased array antenna.
Refer to Fig. 3, Fig. 3 and be based on the virtual array antenna radiation pattern figure that Fig. 2 embodiment illustrates.As Fig. 2 carries
And, MIMO array antenna 220 can be considered to be the virtual array antenna of 1X16 and analyze, and this virtual array antenna
16 reception field pattern RX1～RX16 depicted in antenna patterns illustrated e.g. Fig. 3 corresponding to subarray.Can from Fig. 3
It is apparent from, is between-60 to+60, to there are about 16 obvious main lobes (that is, the lobe indicated with stain) in angle.
Refer to the antenna of the second transmitting subarray that Fig. 4, Fig. 4 are based in the phased array antenna that Fig. 2 embodiment illustrates
Radiation pattern figure.In the present embodiment, field pattern TX1～TX4 the most e.g. when phased array 230 is enabled, second
Launch the antenna patterns illustrated of subarray T2_1～T2_4.Subarray T2_1～T2_4 is launched here with horizontal polarization second, and
Can be by changing outputting phase to adjustment antenna radiation patterns and suppressing minor lobe of the second transmitting subarray T2_1～T2_4.
Consequently, it is possible to multiple lobes on the horizontal level can be realized and increase antenna gain.Additionally, due to second launches submatrix
Row T2_1～T2_4 launches simultaneously, thus can change scanning angle, and then promotes the flexibility ratio on using.Referring again to Fig. 5,
Fig. 5 is based on the antenna radiation patterns figure of multiple reception subarrays that Fig. 2 and Fig. 4 embodiment illustrates.In the present embodiment,
Field pattern RX1 '～RX8 ', the most e.g. when phased array 230 is enabled, receives the antenna patterns illustrated of subarray R1～R8.
Adjust antenna patterns illustrated and suppression side by the size and required phase place changing reception subarray R1～R8 reception signal herein
Lobe, and then reach the broadest sweep limits and higher antenna gain.
Refer to Fig. 6, Fig. 6 and be based on the two-way field pattern figure that one embodiment of the invention illustrates.In the present embodiment, field pattern
RX1 "～RX8 " the most e.g. incorporate the second transmitting subarray and receive the antenna radiation patterns figure of subarray.From Fig. 6
Can be seen that have obvious main lobe between 0 degree to 20 degree, this i.e. represents can be by selecting the second transmitting subarray
Radiation pattern optimize antenna radiation patterns and antenna gain, and then increase detecting distance and signal to noise ratio.
As previously mentioned, control unit 140 such as can institute in the storage element such as access hard disk or memorizer (not illustrating)
The program code, software or the module that store switch enable first and launch subarray T1_1 and T1_2 with enable MIMO battle array
Array antenna 120, or switching enable second launch subarray T2_1 and T2_2 with enable phased array antenna 130.Below will
It is described in detail.
Fig. 7 is based on the method for the switching enable array antenna that one embodiment of the invention illustrates.The method that the present embodiment proposes
Can be performed by the radar 100 of Fig. 1, each element of the Fig. 1 that the most i.e. arranges in pairs or groups is to illustrate the details of each step.For the ease of
The concept of the present embodiment is described, it is assumed hereinafter that radar 100 is configured at the surrounding of vehicle, in order to detect other cars of vehicle periphery
Or barrier, but the possible embodiment of the present invention is not limited to that.
First, in step S710, control unit 140 can determine whether to obtain gps signal.The most then control list
According to gps signal, unit 140 can judge whether radar 100 is positioned in specific road section in step S720.In different enforcement
In example, described specific road section can be the less road of highway, through street or vehicle flowrate (such as interstate highway),
But can be not limited to this.If control unit 140 judges that radar 100 is positioned in specific road section, this i.e. represents described vehicle and surrounding
Other vehicles or barrier potential range farther out, thus can successively in step S730 switch enable the second submatrix
Row T2_1～T2_2 is with enable phased array antenna 130.Consequently, it is possible to radar 100 i.e. can detect that barrier farther out or
Other vehicles.
But, if control unit 140 judges that in step S720 radar 100 is not located in specific road section, this i.e. represents thunder
Reach 100 and described vehicle be likely located at urban district or the region of other vehicle flowrate comparatively denses.Therefore, control unit 140 can continue
Enable the first subarray T1_1～T1_2 is switched with enable MIMO array antenna 120 in step S740.Consequently, it is possible to
Radar 100 i.e. can accurately detect other vehicles or the barrier of surrounding by higher angular resolution.
On the other hand, if control unit 140 judges to obtain gps signal in step S710, it is single that this i.e. represents control
Unit 140 possible (temporarily) cannot determine the array sky of enable to be switched according to the place of radar 100 and described vehicle place
Line.Therefore, in step S750, control unit 140 can determine whether translational speed (that is, the described vehicle of radar 100
Translational speed) whether more than predetermined threshold value.The road speed limit of the e.g. general urban road of described predetermined threshold value is (such as
Speed per hour 40 kilometers), but can be not limited to this.In the case, if the translational speed of radar 100 is more than described road speed limit,
This i.e. represents radar 100 and is likely located at the most intensive highway of vehicle flowrate, through street or interstate highway etc., therefore
Control unit 140 can switch enable the second subarray T2_1～T2_2 with enable phased array antenna 130 in step S730.
Consequently, it is possible to radar 100 i.e. can detect that barrier farther out or other vehicles.
But, if the translational speed of radar 100 is not more than predetermined threshold value, this i.e. represents described vehicle and is likely located at vehicle flowrate
The most intensive urban road, therefore control unit 140 can switch enable the first subarray T1_1～T1_2 in step S740
With enable MIMO array antenna 120.Consequently, it is possible to radar 100 i.e. can accurately detect by higher angular resolution
Other vehicles around or barrier.
In other embodiments, the method that control unit 140 can perform Fig. 7 the most again, with adaptively
Determine to be intended to the array antenna of enable according to gps signal or radar 100 translational speed instantly.It addition, it is single when controlling
Unit 140 judges when radar 100 is positioned at described specific road section, and control unit 140 also can determine whether the movement of radar 100
Whether speed is more than another predetermined threshold value.This another predetermined threshold value e.g. highway, through street or interstate are public
Average speed on road, or other are by the speed (such as speed per hour 50 kilometers) of designer's sets itself, but can be not limited to
This.In the case, if control unit 140 judges to be positioned at the radar 100 of specific road section or described vehicle just with no more than institute
Stating the speed of another predetermined threshold value when moving, this i.e. represents it may happen that the situation of traffic congestion.Now, control unit 140 is also
Changeable enable the first subarray T1_1～T1_2 is with enable MIMO array antenna 120.Consequently, it is possible to radar 100 is i.e.
Higher resolution can accurately detect other vehicles or the barrier of surrounding.
In another embodiment, when control unit 140 switches enable MIMO array antenna 120, can be disabled simultaneously
Two subarray T2_1～T2_2 are to disable phased array antenna 130.On the contrary, when control unit 140 switches enable phase place battle array
Array antenna 130, can disable the first subarray T1_1～T1_2 to disable MIMO array antenna 120 simultaneously.
Those of ordinary skill in the art it should be appreciated that, although as a example by the radar 100 of Fig. 1, the most only illustrate that Fig. 7's is thin
Joint, but the method for Fig. 7 may be equally applied to the radar 200 shown in Fig. 2, or other same or analogous radars.
Refer to that Fig. 8 A, Fig. 8 A is based on that one embodiment of the invention illustrates detects other when radar is positioned at specific road section
The schematic diagram of the vehicles.In the present embodiment, radar 810 is such as configured in part shown in Fig. 8 A, that is vehicle 800
The right lateral side tailstock at.Can be seen that from Fig. 8 A, when in the specific road section that vehicle 800 is positioned at e.g. highway, thunder
Reach 810 its phased array antenna of changeable enables (not illustrating) and carry out detecting distance farther out with the obvious field pattern of main lobe 815
Other vehicles (e.g. vehicle 820).
Other are detected when radar is not positioned at specific road section referring again to what Fig. 8 B, Fig. 8 B was based on that Fig. 8 A embodiment illustrates
The schematic diagram of the vehicles.In the present embodiment, when vehicle 800 is positioned at the place of the non-genus specific road section such as urban road,
Its MIMO array antenna (not illustrating) of the changeable enable of radar 810 comes more with the field pattern 815 ' that angular resolution is higher
Accurately detect other vehicles (e.g. vehicle 830～860) close together.
In sum, the radar that the embodiment of the present invention proposes is configured with MIMO array antenna and phased array antenna simultaneously,
Thus can have the advantage of both array antennas, and then improve the known radar only including one of which array antenna simultaneously
Shortcoming.Additionally, designed by suitable structure, the radar that the present invention proposes can more effectively use circuit area.Separately
Outward, the method that the present invention proposes can be according to whether whether obtaining the translational speed of gps signal and/or radar more than presetting door
Limit value switches enable MIMO array antenna or phased array antenna, it is thus possible to allow radar in response in various different feelings
Border uses the array antenna being more suitable for detect.
Although the present invention is open as above with embodiment, but it is not limited to the present invention, in any art
Those of ordinary skill, without departing from the spirit and scope of the present invention, it should a little change and retouching can be made,
Therefore protection scope of the present invention should be as the criterion depending on the defined person of the scope of appending claims.
Claims (13)
1. a radar, this radar includes:
One transceiver；
One MIMO array antenna, this MIMO array antenna couples this transceiver, launches subarray including multiple first
And multiple reception subarray；
One phased array antenna, this phased array antenna couples this transceiver, including multiple second launch subarrays and those
Receive subarray；And
One control unit, this control unit is coupled to this transceiver, be configured to switch enable those first launch subarrays with
This MIMO array antenna of enable, or those the second transmitting subarrays of switching enable are with this phased array antenna of enable.
2. radar as claimed in claim 1, wherein those first transmitting subarrays and those the second transmitting subarray configurations
In one first side of this transceiver, and those receive subarray and are configured at one second side of this transceiver, wherein this first side phase
For this second side.
3. radar as claimed in claim 2, wherein those first transmitting subarrays and those the second transmitting subarrays are indivedual
Including being arranged as multiple first patch antenna of straight line, and those receive that subarrays include individually being arranged as straight line multiple second
Patch antenna.
4. radar as claimed in claim 3, wherein those first transmitting subarrays and those the second transmitting subarrays are parallel
Be arranged in one first plane, and respectively this first launch subarray and respectively this second launch subarray phase center the most right
Together,
Wherein, those receive subarrays be parallel in one second plane, and respectively this reception subarray phase center each other
Alignment,
Wherein, those first launch in subarrays two at a distance of one first distance, and those receive in subarrays adjacent two
Individual reception subarray is at a distance of a second distance, wherein, 8 times that this first distance is this second distance.
5. radar as claimed in claim 1, wherein, those the second transmitting subarrays are configured at those the first transmitting submatrixs
Between in row two.
6. radar as claimed in claim 5, wherein this control unit is configured to:
Judge whether to obtain a global positioning system signal；
If so, judge whether this radar is positioned in a specific road section according to this global positioning system signal；
If so, those the second transmitting subarrays of switching enable are with this phased array antenna of enable.
7. radar as claimed in claim 6, if wherein this radar is not positioned in this specific road section, this control unit switches
Those the first transmitting subarrays of enable are with this MIMO array antenna of enable.
8. radar as claimed in claim 6, if this global positioning system signal wherein cannot be obtained, this control unit warp
Configure with:
Judge that whether a translational speed of this radar is more than a predetermined threshold value；
If so, those the second transmitting subarrays of switching enable are with this phased array antenna of enable.
9. radar as claimed in claim 8, if wherein this translational speed is not more than this predetermined threshold value, this control unit
Those the first transmitting subarrays of switching enable are with this MIMO array antenna of enable.
10. the method switching enable array antenna, the method is applied to a radar, and this radar includes a MIMO battle array
Array antenna, a phased array antenna and a control unit, described method includes:
Judge whether to obtain a global positioning system signal；
If so, judge whether this radar is positioned in a specific road section according to this global positioning system signal；
If so, those the second transmitting subarrays of switching enable are with this phased array antenna of enable.
11. methods as claimed in claim 10, if wherein this radar is not positioned in this specific road section, described method is also wrapped
Include:
Those the first transmitting subarrays of switching enable are with this MIMO array antenna of enable.
12. methods as claimed in claim 10, if wherein cannot obtain this global positioning system signal, described method is also
Including:
Judge that whether a translational speed of this radar is more than a predetermined threshold value；
If so, those the second transmitting subarrays of switching enable are with this phased array antenna of enable.
13. methods as claimed in claim 12, if wherein this translational speed is not more than this predetermined threshold value, described method
Also include:
Those the first transmitting subarrays of switching enable are with this MIMO array antenna of enable.
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