CN111180905B - Array antenna arrangement and automobile - Google Patents
Array antenna arrangement and automobile Download PDFInfo
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- CN111180905B CN111180905B CN201911409679.9A CN201911409679A CN111180905B CN 111180905 B CN111180905 B CN 111180905B CN 201911409679 A CN201911409679 A CN 201911409679A CN 111180905 B CN111180905 B CN 111180905B
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q21/00—Antenna arrays or systems
- H01Q21/06—Arrays of individually energised antenna units similarly polarised and spaced apart
- H01Q21/08—Arrays of individually energised antenna units similarly polarised and spaced apart the units being spaced along or adjacent to a rectilinear path
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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
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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
- G01S7/023—Interference mitigation, e.g. reducing or avoiding non-intentional interference with other HF-transmitters, base station transmitters for mobile communication or other radar systems, e.g. using electro-magnetic interference [EMI] reduction techniques
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/27—Adaptation for use in or on movable bodies
- H01Q1/32—Adaptation for use in or on road or rail vehicles
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- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Radar, Positioning & Navigation (AREA)
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- General Physics & Mathematics (AREA)
- Variable-Direction Aerials And Aerial Arrays (AREA)
- Radar Systems Or Details Thereof (AREA)
Abstract
The invention discloses an array antenna arrangement and an automobile, wherein the antenna arrangement is a multi-input multi-output (MIMO) antenna, and the MIMO antenna comprises: the first transmitting antenna, the second transmitting antenna and the third transmitting antenna are arranged along the transverse direction, and the first receiving antenna, the second receiving antenna, the third receiving antenna and the fourth receiving antenna are arranged along the transverse direction: the distance between the first transmitting antenna and the second transmitting antenna along the transverse direction is 2d, the distance between the second transmitting antenna and the third transmitting antenna along the transverse direction is 11d, the distance between the first receiving antenna and the second receiving antenna along the transverse direction is 3d, the distance between the second receiving antenna and the third receiving antenna along the transverse direction is 3d, the distance between the third receiving antenna and the fourth receiving antenna along the transverse direction is 12d, wherein d is larger than 0.4 time of the working wavelength of the antenna, the problem that the size target of an angle dimension cannot be distinguished due to the fact that the DBF side lobe of the antenna is high is solved, the antenna side lobe is reduced, and the angle resolution is improved under the condition that a super-resolution algorithm is not needed.
Description
Technical Field
The application relates to the technical field of automobile radars, in particular to array antenna arrangement and an automobile.
Background
With the rapid development of intelligent Driving technology, Advanced Driving Assistance System (ADAS) becomes an indispensable part in an intelligent Driving automobile, and the ADAS senses the surrounding environment at any time in the Driving process of the automobile through various sensors mounted on the automobile, collects environmental data, identifies, detects and tracks static or dynamic objects, and performs System operation and analysis by combining with navigator map data, thereby predicting possible dangers and effectively increasing the comfort and safety of automobile Driving. The millimeter wave radar is a main sensor of ADAS due to long detection distance, small influence from the environment, low cost and mature technology, the existing millimeter wave radar of the automobile is generally a Multiple Input Multiple Output (MIMO) antenna, in the related art, fig. 1 is a schematic diagram of an MIMO antenna arrangement according to the related art, as shown in fig. 1, there are 3 transmitting antennas and 4 receiving antennas, the radar resolution is above 4 degrees, and the antenna arrangement in fig. 1 causes high sidelobe of Digital Beam Forming (DBF), so that large and small targets of angle dimension cannot be distinguished.
Aiming at the problem that the large and small targets of the angle dimension cannot be distinguished due to high DBF sidelobe of an antenna in the related art, an effective solution is not provided at present.
Disclosure of Invention
The invention provides an array antenna arrangement and an automobile, aiming at solving the problem that the large and small targets of an angle dimension cannot be distinguished due to high DBF sidelobe of an antenna in the related art.
According to an aspect of the present invention, there is provided an array antenna arrangement, the antenna arrangement being a multiple-input multiple-output, MIMO, antenna, the MIMO antenna comprising: the first transmitting antenna, the second transmitting antenna and the third transmitting antenna are arranged along the transverse direction, and the first receiving antenna, the second receiving antenna, the third receiving antenna and the fourth receiving antenna are arranged along the transverse direction:
the center-to-center distance between the first transmitting antenna and the second transmitting antenna along the transverse direction is 2d, and the center-to-center distance between the second transmitting antenna and the third transmitting antenna along the transverse direction is 11 d;
the first receiving antenna and the second receiving antenna are arranged along the transverse center distance of 3d, the second receiving antenna and the third receiving antenna are arranged along the transverse center distance of 3d, the third receiving antenna and the fourth receiving antenna are arranged along the transverse center distance of 12d, and d is larger than 0.4 time of the working wavelength of the antenna.
In one embodiment, the MIMO antennas form 12 virtual antennas, and the 12 virtual antennas include: first to twelfth virtual antennas.
In one embodiment, the first to twelfth virtual antennas are main arrays, and the first to sixth virtual antennas are sub-arrays.
In one embodiment, the 12 virtual antennas include:
in the first to sixth virtual antennas, centers of adjacent virtual antennas in the transverse direction are spaced by 2 d.
In one embodiment, the 12 virtual antennas further include:
the distance between the centers of the sixth virtual antenna and the seventh virtual antenna along the transverse direction is 3d, the distance between the centers of the seventh virtual antenna and the eighth virtual antenna along the transverse direction is 4d, and the distance between the centers of the eighth virtual antenna and the ninth virtual antenna along the transverse direction is 3 d;
in the ninth to eleventh virtual antennas, centers of adjacent ones of the virtual antennas in the transverse direction are spaced by 1 d;
the center-to-center distance between the eleventh virtual antenna and the twelfth virtual antenna along the transverse direction is 11 d.
In one embodiment, the echo signals output by the MIMO antennas are weighted in digital amplitude terms, and antenna angle measurement is performed by a digital beam forming technique DBF.
In one embodiment, d is half of the operating wavelength of the antenna.
According to another aspect of the present invention, there is provided an antenna arrangement which is a multiple-input multiple-output, MIMO, antenna, comprising: first, second, third and fourth transmitting antennas arranged in the transverse direction, and first, second and third receiving antennas arranged in the transverse direction:
the center-to-center distance between the first transmitting antenna and the second transmitting antenna along the transverse direction is 3d, the center-to-center distance between the second transmitting antenna and the third transmitting antenna along the transverse direction is 3d, and the center-to-center distance between the third transmitting antenna and the fourth transmitting antenna along the transverse direction is 12 d;
the distance between the centers of the first receiving antenna and the second receiving antenna along the transverse direction is 2d, the distance between the centers of the second receiving antenna and the third receiving antenna along the transverse direction is 11d, and d is larger than 0.4 times of the working wavelength of the antennas.
According to another aspect of the present invention, there is provided an automobile having a radar mounted thereon, the radar having an antenna array which is a multiple-input multiple-output, MIMO, antenna, the MIMO antenna including: the first transmitting antenna, the second transmitting antenna and the third transmitting antenna are arranged along the transverse direction, and the first receiving antenna, the second receiving antenna, the third receiving antenna and the fourth receiving antenna are arranged along the transverse direction:
the center-to-center distance between the first transmitting antenna and the second transmitting antenna along the transverse direction is 2d, and the center-to-center distance between the second transmitting antenna and the third transmitting antenna along the transverse direction is 11 d;
the first receiving antenna and the second receiving antenna are arranged along the transverse center distance of 3d, the second receiving antenna and the third receiving antenna are arranged along the transverse center distance of 3d, the third receiving antenna and the fourth receiving antenna are arranged along the transverse center distance of 12d, and d is larger than 0.4 time of the working wavelength of the antenna.
In one embodiment, the MIMO antennas form 12 virtual antennas, and the 12 virtual antennas include: first to twelfth virtual antennas.
In one embodiment, the first to twelfth virtual antennas are main arrays, and the first to sixth virtual antennas are sub-arrays.
With the present invention, a MIMO antenna comprises: the first transmitting antenna, the second transmitting antenna and the third transmitting antenna are arranged along the transverse direction, and the first receiving antenna, the second receiving antenna, the third receiving antenna and the fourth receiving antenna are arranged along the transverse direction: the center-to-center distance between the first transmitting antenna and the second transmitting antenna along the transverse direction is 2d, the center-to-center distance between the second transmitting antenna and the third transmitting antenna along the transverse direction is 11d, the center-to-center distance between the first receiving antenna and the second receiving antenna along the transverse direction is 3d, the center-to-center distance between the second receiving antenna and the third receiving antenna along the transverse direction is 3d, the center-to-center distance between the third receiving antenna and the fourth receiving antenna along the transverse direction is 12d, wherein d is greater than 0.4 times of the working wavelength of the antenna, the problem that the size target of an angle dimension cannot be distinguished due to the high DBF side lobe of the antenna is solved, the side lobe of the antenna is reduced, and the angle resolution is improved under the condition that a super-resolution algorithm is not needed.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the invention without limiting the invention to a proper form.
In the drawings:
fig. 1 is a schematic diagram of MIMO antenna arrangement according to the related art;
fig. 2 is a schematic diagram of an application environment of array antenna arrangement according to an embodiment of the present invention;
fig. 3 is a schematic diagram of transmit antennas of an array antenna arrangement according to an embodiment of the present invention;
fig. 4 is a schematic diagram of a receiving antenna of an array antenna arrangement according to an embodiment of the present invention;
FIG. 5 is a schematic diagram of a virtual antenna according to an embodiment of the present invention;
FIG. 6 is a virtual antenna main array DBF curve according to an embodiment of the invention;
FIG. 7 is a DBF curve obtained for a virtual antenna scanning two objects with a 3 degree pitch according to an embodiment of the present invention;
fig. 8 is a schematic diagram of a sub-array of virtual antennas according to an embodiment of the present invention;
FIG. 9 is a DBF curve for a virtual antenna subarray according to an embodiment of the present invention;
FIG. 10 is a DBF curve for a virtual antenna subarray when detecting a large target in accordance with an embodiment of the present invention;
fig. 11 is a DBF curve when the virtual antenna subarray detects a large target after sidelobe reduction according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present application more apparent, the present application is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present application and are not intended to limit the present application.
It should be noted that the terms "first", "second" and "third" related to the embodiments of the present invention only distinguish similar objects, and do not represent specific ordering for the objects, and the terms "first", "second" and "third" may be interchanged with specific order or sequence, where permitted. It is to be understood that the terms "first," "second," and "third" are used interchangeably where appropriate to enable embodiments of the present invention described herein to be practiced in sequences other than those illustrated or described herein. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present application.
In the description of the present application, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present application can be understood in a specific case by those of ordinary skill in the art.
The array antenna array provided by the present application may be applied to an application environment shown in fig. 2, and fig. 2 is a schematic view of an application environment of the array antenna array according to the embodiment of the present invention, as shown in fig. 2, the array antenna array in the present application may be applied to a millimeter wave radar 202 of an automobile 204, the millimeter wave radar 202 is installed on the automobile 204, the millimeter wave radar 202 transmits an electromagnetic wave and receives an echo of the electromagnetic wave, and position data of a sensing target is measured according to a time difference between transmission and reception, an antenna in the millimeter wave radar 202 is an MIMO antenna, the MIMO antenna includes three transmitting antennas and four receiving antennas, and may sense an object located in a preset area, for example, in the present embodiment, the millimeter wave radar 202 is installed right in front of a head of the automobile 204, and may sense a sector area toward which the millimeter wave radar 202 faces upward.
In one embodiment, an array antenna arrangement is provided, fig. 3 is a schematic diagram of a transmitting antenna of the array antenna arrangement according to an embodiment of the present invention, as shown in fig. 3, fig. 4 is a schematic diagram of a receiving antenna of the array antenna arrangement according to an embodiment of the present invention, as shown in fig. 4, the antenna arrangement is a multiple-input multiple-output MIMO antenna, and the MIMO antenna includes: the first, second, and third transmitting antennas TX1, TX2, and TX3 arranged in the transverse direction, and the first, second, third, and fourth receiving antennas RX1, RX2, RX3, and RX4 arranged in the transverse direction: the center-to-center distance between the TX1 and the TX2 in the transverse direction is 2d, the center-to-center distance between the TX2 and the TX3 in the transverse direction is 11d, the center-to-center distance between the RX1 and the RX2 in the transverse direction is 3d, the center-to-center distance between the RX2 and the RX3 in the transverse direction is 3d, and the center-to-center distance between the RX3 and the RX4 in the transverse direction is 12d, wherein d is greater than 0.4 times of the operating wavelength of the antenna, and is arranged in the transverse direction in the direction of arrow a shown in fig. 3 and 4.
In the array antenna, the antenna generates side lobes, which are signals formed by radiation patterns of the far field, due to design characteristics. The MIMO antenna in the embodiment reduces the side lobe of the antenna, improves the angular resolution, and solves the problem that the large and small targets of the angle dimension cannot be distinguished due to the high DBF side lobe of the antenna through a specific sparse array mode, and the resolution of the 3-transmitting and 4-receiving antenna in the embodiment can reach within 2 degrees under the condition that a super-resolution algorithm is not needed.
In one embodiment, fig. 5 is a schematic diagram of virtual antennas according to an embodiment of the present invention, and as shown in fig. 5, the MIMO antenna forms 12 virtual antennas, including: TX1 and RX1 form a first virtual antenna ant1, TX1 and RX2 form a second virtual antenna ant2, TX1 and RX3 form a third virtual antenna ant3, TX1 and RX4 form a fourth virtual antenna ant4, TX2 and RX1 form a fifth virtual antenna ant5, TX2 and RX2 form a sixth virtual antenna ant6, TX2 and RX3 form a seventh virtual antenna ant7, TX2 and RX4 form an eighth virtual antenna ant8, TX3 and RX1 form a ninth virtual antenna ant9, TX3 and RX2 form a tenth virtual antenna ant10, TX3 and RX3 form an eleventh virtual antenna ant11, TX3 and RX4 form a twelfth virtual antenna ant 12.
The MIMO antenna in this embodiment provides different transmission and reception modes by forming 12 virtual antennas, and improves the multiplexing rate of the transmission antenna and the reception antenna.
In one embodiment, the virtual antennas ant 1-ant 12 are main arrays and the virtual antennas ant 1-ant 6 are sub arrays. The main array is high in resolution, pitching can be measured, the sub-array side lobe is low, large and small targets in the angle dimension can be resolved, the main array and the sub-array complement each other in the using process, and a better detection effect is achieved, wherein the large and small targets in the angle dimension are targets with different object sizes for an antenna under the condition that the direction and the distance are the same, for example, for an automobile and a bicycle which are located in a certain direction of the antenna and are ten meters away from the antenna, the automobile is the large target in the angle dimension, and the bicycle is the small target in the angle dimension. The antenna in this embodiment can still measure the pitch angle, where the pitch angle includes the upper elevation angle and the lower inclination angle of the detection range of the antenna, fig. 6 is a virtual antenna main array DBF curve according to the embodiment of the present invention, as shown in fig. 6, the peak value of the main lobe waveform is higher, and the width is narrower, which indicates that the main array has good directivity. Fig. 7 is a DBF curve obtained by the virtual antenna according to the embodiment of the present invention when two objects with a spacing of 3 degrees are scanned, as shown in fig. 7, a spacing of 3 degrees means that an angle formed by the two objects and the antenna is 3 degrees, and in the case that the spacing between the two objects is 3 degrees, two distinct peaks appear in the DBF curve, which proves that the antenna can distinguish the two objects.
In one embodiment, fig. 8 is a schematic diagram of a subarray of virtual antennas according to an embodiment of the present invention, and as shown in fig. 8, in ant1 to ant6, adjacent virtual antennas are spaced apart from each other by 2d along the center in the transverse direction, which effectively reduces the energy attenuation of the antennas. Fig. 9 is a DBF curve of a virtual antenna subarray according to an embodiment of the present invention, as shown in fig. 9, the amplitude of a side lobe of the subarray is significantly reduced compared to a side lobe of the main subarray in fig. 6, fig. 10 is a DBF curve of the virtual antenna subarray according to an embodiment of the present invention when detecting a large target, as shown in fig. 10, the DBF curve of the subarray in this embodiment has two peak values, which indicates that the subarray in this embodiment can identify a large target of an angle dimension, fig. 11 is a DBF curve of the virtual antenna subarray according to an embodiment of the present invention when detecting a large target after reducing a side lobe, as shown in fig. 11, in this embodiment, windowing is performed when forming the DBF curve, so that a side lobe of the DBF curve is lower.
In one embodiment, in ant1 to ant6, the distance between centers of adjacent virtual antennas in the transverse direction is 2d, the distance between centers of ant6 and ant7 in the transverse direction is 3d, the distance between centers of ant7 and ant8 in the transverse direction is 4d, the distance between centers of ant8 and ant9 in the transverse direction is 3d, in ant9 to ant11, the distance between centers of adjacent virtual antennas in the transverse direction is 1d, and the distance between centers of ant11 and ant12 in the transverse direction is 11 d.
In one embodiment, the MIMO antenna also uses DBF for angle measurement, and digital amplitude and phase weighting is performed on echo signals output by multiple receiving channels of the array antenna in a signal processing stage to form one or more specifically directed receiving beams. Compared with the microwave phase shifter beam forming technology, the DBF technology can obtain considerable accumulated gain so as to improve the action distance of the radar, ultralow sidelobe and flexible beam control can be realized, so that good anti-interference characteristics are obtained, and the radar adopting the DBF technology is easy to realize miniaturization, light weight and low cost.
In one embodiment, d is one-half of the antenna operating wavelength. Under the condition that the value d is half of the working wavelength, the center distance between each transmitting antenna or each receiving antenna in the transverse direction is integral multiple of the half wavelength, so that the side lobe generation can be further reduced, and the directivity of an antenna beam is improved.
In one embodiment, the present application provides an antenna arrangement, the antenna arrangement being a multiple-input multiple-output, MIMO, antenna, the MIMO antenna comprising: first, second, third and fourth transmitting antennas arranged in the transverse direction, and first, second and third receiving antennas arranged in the transverse direction: the center-to-center distance between the first transmitting antenna and the second transmitting antenna along the transverse direction is 3d, the center-to-center distance between the second transmitting antenna and the third transmitting antenna along the transverse direction is 3d, the center-to-center distance between the third transmitting antenna and the fourth transmitting antenna along the transverse direction is 12d, the center-to-center distance between the first receiving antenna and the second receiving antenna along the transverse direction is 2d, the center-to-center distance between the second receiving antenna and the third receiving antenna along the transverse direction is 11d, wherein d is greater than 0.4 times of the operating wavelength of the antenna.
The MIMO antenna in the embodiment reduces the side lobe of the antenna, improves the angular resolution, solves the problem that the large and small targets of the angle dimension cannot be distinguished due to the high DBF side lobe of the antenna, and can achieve the resolution within 2 degrees without using a super-resolution algorithm.
In one embodiment, the present application provides an automobile having a radar mounted thereon, the radar having an antenna array that is a multiple-input multiple-output, MIMO, antenna, the MIMO antenna comprising: the first, second, and third transmitting antennas TX1, TX2, and TX3 arranged in the transverse direction, and the first, second, third, and fourth receiving antennas RX1, RX2, RX3, and RX4 arranged in the transverse direction: the center-to-center distance between the TX1 and the TX2 in the transverse direction is 2d, the center-to-center distance between the TX2 and the TX3 in the transverse direction is 11d, the center-to-center distance between the RX1 and the RX2 in the transverse direction is 3d, the center-to-center distance between the RX2 and the RX3 in the transverse direction is 3d, and the center-to-center distance between the RX3 and the RX4 in the transverse direction is 12d, wherein d is greater than 0.4 times of the operating wavelength of the antenna, and is arranged in the transverse direction in the direction of arrow a shown in fig. 3 and 4.
The millimeter wave MIMO antenna in the automobile of the embodiment reduces the antenna side lobe through a specific sparse array mode, thereby improving the angular resolution, solving the problem that the DBF side lobe of the antenna is high, which causes that the large and small targets of the angle dimension cannot be distinguished, and under the condition that a super-resolution algorithm is not needed, the resolution of the 3-transmitting and 4-receiving antenna in the embodiment can reach within 2 degrees.
In one embodiment, in an automotive radar MIMO antenna array, d is half the antenna operating wavelength. Under the condition that the value d is half of the working wavelength, the center distance between each transmitting antenna or each receiving antenna in the transverse direction is integral multiple of the half wavelength, so that the side lobe generation can be further reduced, the directivity of antenna beams is improved, and the driving safety of the automobile is improved.
In one embodiment, the MIMO antennas of automotive radar form 12 virtual antennas, including: TX1 and RX1 form a first virtual antenna ant1, TX1 and RX2 form a second virtual antenna ant2, TX1 and RX3 form a third virtual antenna ant3, TX1 and RX4 form a fourth virtual antenna ant4, TX2 and RX1 form a fifth virtual antenna ant5, TX2 and RX2 form a sixth virtual antenna ant6, TX2 and RX3 form a seventh virtual antenna ant7, TX2 and RX4 form an eighth virtual antenna ant8, TX3 and RX1 form a ninth virtual antenna ant9, TX3 and RX2 form a tenth virtual antenna ant10, TX3 and RX3 form an eleventh virtual antenna ant11, TX3 and RX4 form a twelfth virtual antenna ant 12.
The MIMO antenna in this embodiment provides different transmission and reception modes by forming 12 virtual antennas, and improves the multiplexing rate of the transmission antenna and the reception antenna.
In one embodiment, among 12 virtual antennas of the car radar, the virtual antennas ant1 to ant12 are main arrays, and the virtual antennas ant1 to ant6 are sub arrays. The main array is high in resolution, pitching can be measured, the sub-array side lobe is low, large and small targets in the angle dimension can be resolved, the main array and the sub-array complement each other in the using process, and a better detection effect is achieved, wherein the large and small targets in the angle dimension are targets with different object sizes for an antenna under the condition that the direction and the distance are the same, for example, for an automobile and a bicycle which are located in a certain direction of the antenna and are ten meters away from the antenna, the automobile is the large target in the angle dimension, and the bicycle is the small target in the angle dimension.
The technical features of the above embodiments can be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the above embodiments are not described, but should be considered as the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above examples only express several embodiments of the present application, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the concept of the present application, which falls within the scope of protection of the present application. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (8)
1. An array antenna arrangement, characterized in that the antenna arrangement is a multiple-input multiple-output, MIMO, antenna, comprising: the first transmitting antenna, the second transmitting antenna and the third transmitting antenna are arranged along the transverse direction, and the first receiving antenna, the second receiving antenna, the third receiving antenna and the fourth receiving antenna are arranged along the transverse direction:
the center-to-center distance between the first transmitting antenna and the second transmitting antenna along the transverse direction is 2d, and the center-to-center distance between the second transmitting antenna and the third transmitting antenna along the transverse direction is 11 d;
the center-to-center distance between the first receiving antenna and the second receiving antenna along the transverse direction is 3d, the center-to-center distance between the second receiving antenna and the third receiving antenna along the transverse direction is 3d, and the center-to-center distance between the third receiving antenna and the fourth receiving antenna along the transverse direction is 12d, wherein d is greater than 0.4 times of the working wavelength of the antennas;
the MIMO antennas form 12 virtual antennas, the 12 virtual antennas including: first to twelfth virtual antennas; the first to sixth virtual antennas are subarrays, and the center distance between the adjacent virtual antennas along the transverse direction is 2 d.
2. The antenna arrangement according to claim 1, wherein the first to twelfth virtual antennas are main arrays, and the first to sixth virtual antennas are sub-arrays.
3. The antenna arrangement according to claim 1, wherein the 12 virtual antennas further comprise:
the center-to-center distance between the sixth virtual antenna and the seventh virtual antenna along the transverse direction is 3d, the center-to-center distance between the seventh virtual antenna and the eighth virtual antenna along the transverse direction is 4d, and the center-to-center distance between the eighth virtual antenna and the ninth virtual antenna along the transverse direction is 3 d;
in the ninth to eleventh virtual antennas, centers of adjacent ones of the virtual antennas in the transverse direction are spaced by 1 d;
the center-to-center distance between the eleventh virtual antenna and the twelfth virtual antenna along the transverse direction is 11 d.
4. The antenna array according to claim 1, wherein echo signals output from the MIMO antennas are weighted in terms of digital amplitude, and antenna angle measurement is performed by a digital beam forming technique DBF.
5. The antenna arrangement as claimed in claim 1, wherein d is half the operating wavelength of the antenna.
6. An array antenna arrangement, characterized in that the antenna arrangement is a multiple-input multiple-output, MIMO, antenna, comprising: first, second, third and fourth transmitting antennas arranged in the transverse direction, and first, second and third receiving antennas arranged in the transverse direction:
the center-to-center distance between the first transmitting antenna and the second transmitting antenna along the transverse direction is 3d, the center-to-center distance between the second transmitting antenna and the third transmitting antenna along the transverse direction is 3d, and the center-to-center distance between the third transmitting antenna and the fourth transmitting antenna along the transverse direction is 12 d;
the center-to-center distance between the first receiving antenna and the second receiving antenna along the transverse direction is 2d, the center-to-center distance between the second receiving antenna and the third receiving antenna along the transverse direction is 11d, wherein d is greater than 0.4 times of the working wavelength of the antennas;
the MIMO antennas form 12 virtual antennas, the 12 virtual antennas including: first to twelfth virtual antennas; the first to sixth virtual antennas are subarrays, and the center distance between the adjacent virtual antennas along the transverse direction is 2 d.
7. The utility model provides an automobile, install the radar on the automobile, its characterized in that, the antenna arrangement of radar is multiple input multiple output MIMO antenna, MIMO antenna includes: the first transmitting antenna, the second transmitting antenna and the third transmitting antenna are arranged along the transverse direction, and the first receiving antenna, the second receiving antenna, the third receiving antenna and the fourth receiving antenna are arranged along the transverse direction:
the center-to-center distance between the first transmitting antenna and the second transmitting antenna along the transverse direction is 2d, and the center-to-center distance between the second transmitting antenna and the third transmitting antenna along the transverse direction is 11 d;
the center-to-center distance between the first receiving antenna and the second receiving antenna along the transverse direction is 3d, the center-to-center distance between the second receiving antenna and the third receiving antenna along the transverse direction is 3d, and the center-to-center distance between the third receiving antenna and the fourth receiving antenna along the transverse direction is 12d, wherein d is greater than 0.4 times of the working wavelength of the antennas;
the MIMO antennas form 12 virtual antennas, the 12 virtual antennas including: first to twelfth virtual antennas; the first to sixth virtual antennas are subarrays, and the center distance between the adjacent virtual antennas along the transverse direction is 2 d.
8. The automobile of claim 7, wherein the MIMO antennas form 12 virtual antennas, the 12 virtual antennas comprising: first to twelfth virtual antennas.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911409679.9A CN111180905B (en) | 2019-12-31 | 2019-12-31 | Array antenna arrangement and automobile |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911409679.9A CN111180905B (en) | 2019-12-31 | 2019-12-31 | Array antenna arrangement and automobile |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111180905A CN111180905A (en) | 2020-05-19 |
| CN111180905B true CN111180905B (en) | 2021-07-20 |
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| CN113285211A (en) * | 2021-06-30 | 2021-08-20 | 广州极飞科技股份有限公司 | Radar antenna, radar device and movable platform |
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| CN107515399A (en) * | 2016-06-17 | 2017-12-26 | 启碁科技股份有限公司 | Vehicle radar system |
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