CN113471717B - Antenna module and radar - Google Patents
Antenna module and radar Download PDFInfo
- Publication number
- CN113471717B CN113471717B CN202110620919.0A CN202110620919A CN113471717B CN 113471717 B CN113471717 B CN 113471717B CN 202110620919 A CN202110620919 A CN 202110620919A CN 113471717 B CN113471717 B CN 113471717B
- Authority
- CN
- China
- Prior art keywords
- antenna
- receiving antenna
- units
- receiving
- transmitting antenna
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Classifications
-
- 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
- H01Q21/20—Arrays of individually energised antenna units similarly polarised and spaced apart the units being spaced along or adjacent to a curvilinear path
-
- 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
-
- 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
- G01S7/024—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S13/00 using polarisation effects
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q21/00—Antenna arrays or systems
- H01Q21/0006—Particular feeding systems
-
- 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
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q21/00—Antenna arrays or systems
- H01Q21/24—Combinations of antenna units polarised in different directions for transmitting or receiving circularly and elliptically polarised waves or waves linearly polarised in any direction
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q9/00—Electrically-short antennas having dimensions not more than twice the operating wavelength and consisting of conductive active radiating elements
- H01Q9/04—Resonant antennas
- H01Q9/0407—Substantially flat resonant element parallel to ground plane, e.g. patch antenna
- H01Q9/045—Substantially flat resonant element parallel to ground plane, e.g. patch antenna with particular feeding means
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Radar, Positioning & Navigation (AREA)
- Remote Sensing (AREA)
- Variable-Direction Aerials And Aerial Arrays (AREA)
Abstract
本发明实施例涉及雷达天线技术领域，公开了一种天线模组和雷达，天线模组包括：发射天线组件和接收天线组件，所述发射天线组件和所述接收天线组件在预设平面上平行设置；所述发射天线组件包括第一柱面基板和在所述第一柱面基板的一面上沿着圆周方向平行设置的多个发射天线单元；所述接收天线组件包括第二柱面基板和在所述第二柱面基板的一面上沿着圆周方向平行设置的多个接收天线单元；多个所述发射天线单元和多个所述接收天线单元用于在空间上形成雷达的MIMO天线阵列。通过上述方式，本发明实施例以期实现提高天线的覆盖范围。
The embodiment of the present invention relates to the technical field of radar antennas, and discloses an antenna module and a radar, wherein the antenna module comprises: a transmitting antenna assembly and a receiving antenna assembly, wherein the transmitting antenna assembly and the receiving antenna assembly are arranged in parallel on a preset plane; the transmitting antenna assembly comprises a first cylindrical substrate and a plurality of transmitting antenna units arranged in parallel along a circumferential direction on one surface of the first cylindrical substrate; the receiving antenna assembly comprises a second cylindrical substrate and a plurality of receiving antenna units arranged in parallel along a circumferential direction on one surface of the second cylindrical substrate; the plurality of transmitting antenna units and the plurality of receiving antenna units are used to form a MIMO antenna array of the radar in space. In the above manner, the embodiment of the present invention is intended to improve the coverage range of the antenna.
Description
Technical Field
The embodiment of the invention relates to the technical field of radar antennas, in particular to an antenna module and a radar.
Background
The radar obtains information such as the distance from the target to the electromagnetic wave emission point, the distance change rate (radial velocity), the azimuth, and the like by emitting electromagnetic waves, irradiating the target, and receiving the echo. The radar has the advantages that the radar can detect long-distance targets in the daytime and at night, is not blocked by fog, cloud and rain, and has the characteristics of all weather and all-weather, so that the radar is widely applied to the fields of automobile safe driving, unmanned aerial vehicles, security protection and the like. Among them, the radar measures three coordinates (azimuth, elevation and distance) of the target position, and two coordinates (azimuth and elevation) are measured directly in relation to the performance of the antenna, and thus the antenna performance is more important for the radar than for other components.
At present, in a radar antenna with a single board, the maximum coverage area is about 70 degrees, the farther the detection distance is, the narrower the antenna beam is, the narrower the coverage direction is, the wide coverage area is difficult to achieve, and the detection distance is far, so that the long-distance coverage and the wide coverage are required to be achieved in a mechanical scanning or phased array mode, but the complexity and the cost of the system design are increased in the mode.
Disclosure of Invention
In view of the above problems, an embodiment of the present invention provides an antenna module and a radar for improving coverage of an antenna.
According to an aspect of an embodiment of the present invention, there is provided an antenna module including: the antenna comprises a transmitting antenna assembly and a receiving antenna assembly, wherein the transmitting antenna assembly and the receiving antenna assembly are arranged in parallel on a preset plane; the transmitting antenna assembly comprises a first cylindrical substrate and a plurality of transmitting antenna units which are arranged on one surface of the first cylindrical substrate in parallel along the circumferential direction; the receiving antenna assembly comprises a second cylindrical substrate and a plurality of receiving antenna units which are arranged on one surface of the second cylindrical substrate in parallel along the circumferential direction.
In an optional manner, each transmitting antenna unit includes a plurality of first patch units, and the plurality of first patch units are configured in a preset manner to form the same or different first patch antennas; each receiving antenna unit comprises a plurality of second patch units, and the second patch units are configured to form the same or different second patch antennas according to a preset mode.
In an alternative manner, the plurality of transmitting antenna units include the same first patch antenna, and the spacing of orthographic projections on the preset plane between two adjacent first patch antennas is equal; the plurality of receiving antenna units comprise the same second patch antennas, and the orthographic projection distance between two adjacent second patch antennas on the preset plane is equal.
In an alternative manner, the plurality of transmitting antenna units includes at least two groups of transmitting antenna units, each group of transmitting antenna units includes at least two transmitting antenna units, each transmitting antenna unit of each group of transmitting antenna units corresponds to a respective transmitting channel, and each group of at least two groups of transmitting antenna units has one transmitting antenna unit corresponding to one transmitting channel.
In an alternative manner, the plurality of receiving antenna units includes at least two receiving antenna unit groups, each of the receiving antenna unit groups includes at least two receiving antenna units, each of the receiving antenna units in each of the receiving antenna unit groups corresponds to a respective receiving channel, and each of the at least two receiving antenna unit groups has one receiving antenna unit corresponding to one receiving channel.
In an optional manner, the transmitting antenna assembly further includes a first supporting member, the first supporting member has a cylindrical surface, the first cylindrical substrate is a flexible substrate, and the other surface of the first cylindrical substrate, which is opposite to the receiving antenna unit, is attached to the cylindrical surface of the first supporting member;
The receiving antenna assembly further comprises a second supporting piece, the second supporting piece is provided with a cylindrical surface, the second cylindrical substrate is a flexible substrate, and the second cylindrical substrate is attached to the cylindrical surface of the second supporting piece and is provided with the other surface, deviating from the transmitting antenna unit, of the second cylindrical substrate.
In an alternative manner, the transmitting antenna component and the receiving antenna component are arranged in parallel and in parallel on the preset plane.
In an alternative manner, the transmitting antenna assembly and the receiving antenna assembly are arranged in parallel side by side on the preset plane.
In an alternative manner, a plurality of the transmitting antenna units in the transmitting antenna assembly each have a first feed port end, and a plurality of the receiving antenna units in the receiving antenna assembly each have a second feed port end, and the first feed port ends are disposed opposite to the second feed port ends.
According to another aspect of the embodiment of the invention, a radar is provided, which includes the antenna module.
According to the antenna module, the plurality of transmitting antenna units are arranged in parallel along the circumferential direction of the first cylindrical substrate to form the conformal transmitting antenna array, and the plurality of receiving antenna units are arranged in parallel along the circumferential direction of the second cylindrical substrate to form the conformal receiving antenna array, so that the signal can be received and sent by the plurality of transmitting antenna units and the plurality of receiving antenna units respectively, and the signal quality is improved. The half-power wave beam coverage of a plurality of transmitting antenna units is overlapped to form the total coverage of the transmitting line component, and the half-power wave beam coverage of a plurality of receiving antenna units is overlapped to form the total coverage of the receiving antenna component.
The foregoing description is only an overview of the present invention, and is intended to be implemented in accordance with the teachings of the present invention in order that the same may be more clearly understood and to make the same and other objects, features and advantages of the present invention more readily apparent.
Drawings
Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the invention. Also, like reference numerals are used to designate like parts throughout the figures. In the drawings:
fig. 1 is a schematic perspective view of an antenna module according to an embodiment of the invention;
Fig. 2 shows a front view of a transmitting antenna assembly provided by an embodiment of the present invention;
FIG. 3 shows a schematic cross-sectional view of FIG. 2 along the direction A-A;
fig. 4 shows a front view of a receiving antenna assembly provided by an embodiment of the present invention;
FIG. 5 is a schematic view showing a sectional structure of FIG. 4 along the direction B-B;
Fig. 6 is a schematic perspective view of an antenna module according to another embodiment of the present invention;
fig. 7 shows a simplified schematic diagram of a transmitting antenna assembly provided in an embodiment of the present invention;
fig. 8 shows a schematic diagram of a receiving antenna assembly according to an embodiment of the present invention;
Fig. 9 is a schematic diagram of an antenna assembly according to an embodiment of the present invention;
fig. 10 shows a signal simulation diagram of a transmitting antenna assembly according to an embodiment of the present invention;
fig. 11 is a signal simulation diagram of a receiving antenna assembly according to an embodiment of the present invention;
fig. 12 is a schematic diagram of a receiving antenna assembly according to another embodiment of the present invention;
Fig. 13 is a signal simulation diagram of a receiving antenna assembly according to another embodiment of the present invention.
Reference numerals in the specific embodiments are as follows:
A transmitting antenna assembly 10; a first cylindrical substrate 11; a first layout layer 111; a first ground layer 112; a transmitting antenna unit 12; a first patch unit 121; a first feed port end 122; a first support 13;
A receiving antenna assembly 20; a second column base plate 21; a second layout layer 211; a second ground layer 212; a receiving antenna unit 22; a second patch unit 221; a second feed port end 222; a second support 23; a preset plane 30; an antenna module 100.
Detailed Description
Embodiments of the technical scheme of the present invention will be described in detail below with reference to the accompanying drawings. The following examples are only for more clearly illustrating the technical aspects of the present invention, and thus are merely examples, and are not intended to limit the scope of the present invention.
The embodiment of the application provides an antenna module 100, which can be applied to millimeter wave radar, but is not limited to the millimeter wave radar. Fig. 1 is a schematic perspective view of an antenna module according to an embodiment of the application. The antenna module 100 includes a transmitting antenna assembly 10 and a receiving antenna assembly 20, and the transmitting antenna assembly 10 and the receiving antenna assembly 20 are disposed in parallel on a preset plane 30. The transmitting antenna assembly 10 includes a first cylindrical substrate 11 and a plurality of transmitting antenna units 12 disposed in parallel along a circumferential direction on one side of the first cylindrical substrate 11. The receiving antenna assembly 20 includes a second cylindrical substrate 21 and a plurality of receiving antenna units 22 arranged in parallel in the circumferential direction on one side of the second cylindrical substrate 21. The plurality of transmit antenna elements 12 and the plurality of receive antenna elements 22 are used to spatially form a MIMO ((Multiple Input Multiple Output, multiple-input multiple-output) antenna array of the radar.
The preset plane 30 may be a vertical plane located at the front side of the radar detection direction and perpendicular to the horizontal plane where the radar is located, and the preset plane may be a manually set reference plane (i.e. a virtual plane), or an installation plane (i.e. a physical plane) for installing the receiving antenna assembly 20 and the transmitting antenna assembly 10, which is not particularly limited herein.
In the antenna module 100 of the present embodiment, a plurality of transmitting antenna units 12 are arranged in parallel along the circumferential direction of the first cylindrical substrate 11 to form a conformal transmitting antenna array, and a plurality of receiving antenna arrays are arranged in parallel along the circumferential direction of the second cylindrical substrate 21 to form a conformal receiving antenna array, so that the radar can respectively receive and transmit signals through the plurality of transmitting antenna units 12 and the plurality of receiving antenna units 22, thereby improving signal quality. The half-power beam coverage of the plurality of transmitting antenna units 12 is superimposed to form the total coverage of the transmitting line assembly 10, and the half-power beam coverage of the plurality of receiving antenna units 22 is superimposed to form the total coverage of the receiving antenna assembly 20, in this way, the coverage is wide.
In addition, the coverage area of the antenna can be adjusted by adjusting the number and distribution of the transmitting antenna units 12 on the first cylindrical substrate 11 or the number and distribution of the receiving antenna units 22 on the second cylindrical substrate 21, in this way, the coverage and detection coverage area of the radar antenna can be adjusted according to the actual requirement, so that the radar beam design is more flexible, the physical angle range covered by the first cylindrical substrate 11 or the second cylindrical substrate 21 in the circumferential direction is the maximum beam width of the antenna, and compared with the conventional manner, the transmitting antenna unit 12 and the receiving antenna can be respectively and independently arranged on the first cylindrical substrate and the second cylindrical substrate, and can be separately designed, so that the structure is simple and the cost is low.
In some embodiments, the transmitting antenna assembly 10 and the receiving antenna assembly 20 are disposed in parallel and in parallel on a predetermined plane 30. That is, the transmitting antenna assembly 10 and the receiving antenna assembly 20 are arranged side by side on the horizontal plane, and at this time, the plane where the central axis of the first cylindrical substrate 11 of the transmitting antenna assembly 10 and the central axis of the second cylindrical substrate 21 of the receiving antenna assembly 20 are located is parallel to the preset plane.
In some embodiments, referring to fig. 1, each of the transmitting antenna units 12 includes a plurality of first patch units 121, and the plurality of first patch units 121 are configured in a preset manner to form the same or different first patch antennas. Each of the receiving antenna units 22 includes a plurality of second patch units 221, and the plurality of second patch units 221 are configured in a preset manner to form the same or different second patch antennas.
The configuration of each of the first patch unit 121 and the second patch unit 221 may be manually set.
The configuration of the plurality of first patch units 121 in a preset manner means that the transmitting antenna units 12 are arranged on the first cylindrical substrate according to a certain order according to the size and the number of the first patch units 121, and the different configuration manners of the first patch units 121 affect the coverage area, the beam width and other performances of the transmitting antenna units 12.
As an example, each of the transmitting antenna units 12 may be a first patch antenna formed by a plurality of (e.g., 10) rectangular first patch units 121 connected via series feedback, and the first patch antenna has a comb shape.
Similarly, for the same receiving antenna unit 22, when the number of second patch units 221 of the receiving antenna unit 22 is arranged on the second cylindrical substrate 21 in a certain order, the arrangement of the second patch units 221 is different, which affects the coverage area, beam width, and other performances of the receiving antenna unit 22.
As an example, each receiving antenna unit 22 may be a second patch antenna formed by connecting a plurality (e.g., 10) of rectangular series-fed second patch units 221, where the second patch antenna has a comb shape.
Of course, the first patch unit 121 and the second patch unit 221 may take other shapes, such as a circle, etc., and the transmitting antenna unit 12 and the receiving antenna unit 22 may also be a patch antenna with a sugarcoated haws string, a patch antenna with 45 ° polarization, etc.
In this embodiment, the transmitting antenna unit 12 is set to be a first patch antenna formed by series-feeding connection of the first patch unit 121, and the receiving antenna unit 22 is set to be a second patch antenna formed by series-feeding connection of the second patch unit 221, so that the transmitting antenna unit 12 and the receiving antenna unit 22 have simple structure, high integration, easy processing, controllable error and low use cost.
Specifically, the interval between two adjacent first patch units 121 is 0.5λ 1, where λ 1 is the medium wavelength of the first patch units 121, the length of the first patch units 121 is 0.5λ 1, and the resonant frequency point of the transmitting antenna unit 12 can be changed by adjusting the length of the first patch units 121. Since the width of each first patch unit 121 is related to the current distribution size on each first patch unit 121, the wider the width is, the greater the current distributed on the first patch unit 121 is, and the first patch unit 121 may employ a doffer chebyshev distribution.
The distance between two adjacent second patch units 221 is 0.5λ 2, where λ 2 is the medium wavelength of the second patch unit 221, the length of the second patch unit is 0.5λ 2, and the resonant frequency point of the receiving antenna unit 22 can be changed by adjusting the length of the second patch unit 221. Since the width of the second patch unit 221 is related to the current distribution size on each second patch unit 221, the wider the width is, the larger the current divided on the second patch unit 221 is, and the second patch unit 221 current adopts the doffer chebyshev distribution.
With continued reference to fig. 1, in some embodiments, the plurality of transmitting antenna units 12 include identical first patch antennas, and the spacing of orthographic projections on the predetermined plane 30 between adjacent first patch antennas is equal. The plurality of receiving antenna units 22 include identical second patch antennas, and the spacing of orthographic projections on the preset plane 30 between two adjacent second patch antennas is equal. The first patch antenna and the second patch antenna are different, that is, the first patch unit 121 in the first patch antenna is configured differently from the second patch unit 221 in the second patch antenna.
In the embodiment of the present application, by setting the plurality of transmitting antenna units 12 of the transmitting antenna assembly 10 to be the same first patch antenna, the plurality of transmitting antenna units 12 can be uniformly arranged on the first cylindrical substrate 11 according to the interval between two adjacent transmitting antenna units 12; likewise, by setting the plurality of receiving antenna units 22 of the receiving antenna assembly 20 to be the same second patch antenna, the plurality of receiving antenna units 22 can be uniformly disposed on the second cylindrical substrate according to the interval between two adjacent receiving antenna units 22, thereby facilitating the arrangement of the receiving antenna units 22 and the transmitting antenna units 12 and reducing the design difficulty.
It should be noted that, in other embodiments, the plurality of transmitting antenna units 12 may also include different first patch antennas, and the plurality of receiving antenna units 22 may also include different second patch antennas.
It will be appreciated that in other embodiments, the first patch antenna and the second patch antenna may be identical.
In some embodiments, the plurality of transmit antenna elements 12 includes at least two groups of transmit antenna elements, each group of transmit antenna elements including at least two transmit antenna elements 12, each transmit antenna element 12 of each group of transmit antenna elements having a respective transmit channel, and each of the at least two groups of transmit antenna elements having one transmit antenna element 12 corresponding to one and the same transmit channel.
That is, the plurality of transmitting antenna units 12 are divided into at least two groups of transmitting antenna units including the same number of transmitting antenna units 12, and the number of transmitting channels is the same as the number of transmitting antenna units 12 of each group of receiving antenna units.
The number of the transmitting antenna unit groups and the number of the transmitting antenna units 12 in each transmitting antenna unit group can be set according to the coverage area, gain and other practical requirements of the transmitting antennas. As an example, the plurality of receiving antenna elements 22 may be divided into 2 groups, 3 groups, 4 groups, etc., and the number of receiving antenna elements 22 of each group of transmitting antenna elements may be 2, 3, 4, etc.
In the embodiment of the present application, one transmitting channel of the radar corresponds to at least two transmitting antenna units 12, and the gain and the total coverage area of the transmitting antenna corresponding to each receiving channel are improved by overlapping the transmitting antenna units 12.
In some embodiments, the plurality of receiving antenna elements 22 includes at least two receiving antenna element groups, each receiving antenna element group includes at least two receiving antenna elements 22, each receiving antenna element 22 of each receiving antenna element group corresponds to a respective receiving channel, and each of the at least two receiving antenna element groups has one receiving antenna element 22 corresponding to the same receiving channel.
That is, the plurality of receiving antenna units 22 are divided into at least two groups of receiving antenna units including the same number of receiving antenna units 22, and the number of receiving channels is the same as the number of receiving antenna units 22 of each group of receiving antenna units.
The number of the receiving antenna unit groups and the number of the receiving units of each receiving antenna unit group can be set according to the actual requirements of the coverage area, the gain and the like of the receiving antenna. As an example, the plurality of receiving antenna elements 22 may be divided into 2 groups, 3 groups, 4 groups, etc., and as such, the number of receiving antenna elements 22 of each group of receiving antenna elements may be 2, 3, 4, etc.
In this embodiment, by associating one receiving channel of the radar with a plurality of receiving antenna units 22, the gain and the total coverage of the receiving antenna corresponding to each receiving channel are improved by overlapping the receiving antenna units 22.
In some specific embodiments, as shown in fig. 2 and fig. 5, fig. 2 shows a front view of a transmitting antenna assembly 10 according to an embodiment of the present invention, fig. 3 shows a schematic cross-sectional structure of fig. 2 along A-A direction, fig. 5 shows a schematic cross-sectional structure of fig. 4 along B-B direction, and fig. 6 shows a schematic perspective structure of an antenna module according to another embodiment of the present invention. The transmitting antenna assembly 10 comprises a first supporting member 13, the first supporting member 13 has a cylindrical surface, the first cylindrical substrate 11 is a flexible substrate, and the other surface of the first cylindrical substrate 11, which is opposite to the surface provided with the receiving antenna unit 22, is attached to the cylindrical surface of the first supporting member 13. The receiving antenna assembly 20 further includes a second support 23, where the second support 23 has a cylindrical surface, the second cylindrical substrate 21 is a flexible substrate, and the other surface of the second cylindrical substrate 21 facing away from the receiving antenna unit 22 is attached to the cylindrical surface of the second support 23.
The first supporting member 13 may be a cylindrical supporting plate with the same outline of the first cylindrical substrate 11, and the second supporting member 23 may be a cylindrical supporting plate with the same outline of the first cylindrical substrate 11. The first support 13 and the second support 23 may be made of hard materials, such as metallic materials of copper, iron, aluminum, etc., or hard plastic materials of bakelite, etc. The first support 13 is used for fixedly supporting the first cylindrical substrate 11 to improve the structural strength of the first cylindrical substrate 11, and the second support 23 is used for fixedly supporting the second cylindrical substrate 21 to improve the structural strength of the second cylindrical substrate 21.
Of course, the transmitting antenna assembly 10 and the receiving antenna assembly 20 may be mounted and fixed on a horizontal supporting surface on which the radar is located or directly mounted and fixed on the radar by means of the first supporting member 13 and the second supporting member 23, respectively.
It is understood that the first and second supports 13 and 23 may also be cylindrical, semi-cylindrical, oval cylindrical, semi-oval cylindrical, prismatic (such as triangular prism, rectangular pyramid, etc.), etc., but are not limited thereto.
In the case where the transmitting antenna assembly 10 and the receiving antenna assembly 20 are disposed in parallel side by side on the predetermined plane 30, the first supporting member 13 and the second supporting member 23 may be integrated.
Specifically, the first cylindrical substrate 11 includes a first layout layer 111 and a first ground layer 112, the first ground layer 112 is attached to the cylindrical surface of the first support member 13, and the transmitting antenna unit 12 is disposed on a surface of the first layout layer 111 facing away from the first ground layer 112.
The second cylindrical substrate 21 includes a second layout layer 211 and a second ground layer 212, the second ground layer 212 is attached to the cylindrical surface of the second supporting member 23, and the receiving antenna unit 22 is disposed on a surface of the second layout layer 211 facing away from the second ground layer 212.
The first layout layer 111 and the second layout layer 211 may be made of a flexible insulating material, for example: resin-based materials and ceramic-based materials. The first ground layer 112 and the second ground layer 212 may be made of a metal material such as copper.
In some specific embodiments, the thickness of the first routing layer 111 is 5mil, the material is rogers 3003, and the thickness of the first ground layer 112 is 0.0175mm. Similarly, the thickness of the second layout layer 211 is 5mil, the material is rogers 3003, and the thickness of the second ground layer 212 is 0.0175mm.
In some embodiments, as shown in fig. 6, fig. 6 shows a schematic perspective view of an antenna module according to another embodiment of the present invention, where a transmitting antenna assembly 10 and a receiving antenna assembly 20 are disposed in parallel side by side on a preset plane 30. That is, the transmitting antenna assembly 10 and the receiving antenna assembly 20 are arranged side by side in the vertical direction, and at this time, the central axis of the first cylindrical substrate 11 of the transmitting antenna assembly 10 and the central axis of the second cylindrical substrate of the receiving antenna assembly 20 are coaxially arranged.
In some embodiments, referring to fig. 6, the plurality of transmitting antenna units 12 of the transmitting antenna assembly 10 each have a first feeding port end 122, and the plurality of receiving antenna units 22 of the receiving antenna units 22 each have a second feeding port end 222, where the first feeding port end 122 is disposed opposite to the second feeding port end 222.
Wherein the first feed port 122 and the second feed port 222 are respectively electrically connected to a feed network of the radar.
According to the embodiment of the application, the first feed port end 122 and the second feed port end 222 are arranged oppositely, so that the wiring path of the feed network of the radar can be shortened, and the loss of a line to a signal can be reduced.
It is understood that in other embodiments, the first and second power supply ports 122 and 222 may not be disposed opposite each other.
For easy understanding, the following describes the technical scheme of the present application:
The cylindrical surfaces of the first cylindrical surface substrate 11 and the second cylindrical surface substrate 21 are all semi-cylindrical surfaces, the plurality of transmitting antenna units 12 are all identical first patch antennas, the plurality of receiving antenna units 22 are all identical second patch antennas, the first patch antennas are different from the second patch antennas, and the plurality of transmitting antenna units 12 and the plurality of receiving antenna units 22 form a MIMO antenna array of 3 transmitting channels and 4 receiving channels.
As shown in fig. 7 and 9, in combination with fig. 6, fig. 7 shows a schematic diagram of a transmitting antenna assembly 10 according to an embodiment of the present invention, fig. 8 shows a schematic diagram of a receiving antenna assembly according to an embodiment of the present invention, and fig. 9 shows a schematic diagram of an antenna assembly according to an embodiment of the present invention when in operation. Wherein each transmit channel corresponds to one transmit antenna element 12 and each receive channel corresponds to one receive antenna element 22.
With continued reference to fig. 9, the black filled circles represent the transmitting antenna elements 12, the open circles represent the receiving antenna elements 22, and the open dashed circles represent the equivalent receiving antenna elements 22. In operation, the 3 transmitting antenna units 12 respectively transmit electromagnetic waves at different moments, and the 4 receiving antenna units 22 simultaneously receive the electromagnetic waves, so that 12 antenna channels are virtually obtained, and the gain of the whole antenna is increased, the wave beam is narrowed, and the resolution of the detection angle is increased through superposition of the antenna channels.
The distance between the orthographic projections of the adjacent two receiving antenna units 22 in the preset plane is d, the distance between the orthographic projections of the adjacent two transmitting antenna units 12 in the preset plane is 4d, when the receiving antenna units 22 receive the echo signals of the transmitting antenna units 12, the phase difference between the receiving channels corresponding to the adjacent two receiving antenna units 22 is dsin (θ), wherein θ is the target azimuth angle, and therefore the target azimuth angle can be obtained according to the phase difference between the receiving channels.
In some embodiments, the spacing d=0.5λ 3 between the orthographic projections of the two adjacent receiving antenna units 22 on the preset plane 30, and the spacing between the orthographic projections of the two adjacent transmitting antenna units 12 on the preset plane 30 is 2λ 3, where λ 3 is the wavelength of the electromagnetic wave.
The 3 transmitting antenna units 12 are uniformly arranged on the first cylindrical substrate 11 at intervals, and feed the transmitting antenna units 12 of TX1, TX2 and TX3 respectively, as shown in fig. 10, fig. 10 shows a signal simulation diagram of the transmitting antenna assembly 10 provided by an embodiment of the present invention, the transmitting antenna has gains of more than 11.7dB in a coverage range of-90 ° to + 90 °, the maximum gain is 14.29dB, a coverage range of 180 ° can be reached, and the antenna gain is greater than 11.7dB.
Assuming that the 4 receiving antenna units 22 are uniformly disposed on the second cylindrical substrate 21, the target receiving energy of the receiving antenna for the position within ±90° range is too weak to reach an effective coverage range of 180 °. At this time, in order to satisfy that the receiving antennas can well receive the target electromagnetic wave echoes within the coverage of 180 degrees, 8 receiving antenna units 22 are disposed on the second cylindrical substrate 21, and the 8 receiving antenna units 22 are divided into 2 receiving antenna unit groups, each receiving antenna unit group includes 4 receiving antenna units 22, and each of the 2 receiving antenna unit groups has one receiving antenna unit 22 corresponding to the same receiving channel.
The 4 receiving antenna units 22 of the group of receiving antenna units are respectively: RX1, RX2, RX3, RX4, the 4 receive antenna elements 22 of the other group of receive antenna elements are respectively: RX 1', RX 2', RX3 ', RX 4', wherein RX1 and RX1 'correspond to the same receiving channel, RX2 and RX 2' correspond to the same receiving channel, RX3 and RX3 'correspond to the same receiving channel, RX4 and RX 4' correspond to the same receiving channel, and the phase difference brought by the orthographic projection spacing between the two receiving antenna units 22 of each receiving channel on the horizontal base plane is an integer multiple of 2pi, so that the two receiving antenna units 22 of the same receiving channel are used for the equal power divider connection.
By feeding the second feeding port ends 222 of the 8 receiving antenna units 22 respectively, as shown in fig. 11, fig. 11 shows a signal simulation diagram of the receiving antenna assembly 20 provided by an embodiment of the present invention, it can be seen from the diagram that the antenna gains are all 11dB greater in the range from-90 ° to plus 90 °, and the maximum gain is 14.92dB, so that the requirements of 180 ° coverage and higher antenna gain can be well satisfied.
In some embodiments, as shown in the drawings, fig. 12 shows a schematic structural diagram of a receiving antenna assembly 20 according to another embodiment of the present invention, and fig. 13 shows a signal simulation diagram of the receiving antenna assembly 20 according to another embodiment of the present invention. To change the beam pointing of the receiving antenna elements 22, the spacing between the two groups of receiving antenna elements may be adjusted (i.e. the spacing of the orthographic projections of the two receiving elements on the horizontal base plane through the receiving channels is changed). As an example, when the distance between the orthographic projections of the two receiving antenna units 22 on the horizontal base surface is λ 3, the direction angles of the two receiving antenna unit groups are biased to a larger angle.
The second feed port ends 222 of the 8 receiving antenna elements 22 are fed again, respectively, and it can be seen from fig. 13 that the antenna gains are all greater than 12.7dB in the range of-90 ° to ± 90 °, the maximum gain is 15.1dB, and the gain is increased by 1.7dB in the range of ± 90 ° and the maximum gain is increased by 0.2dB compared to the simulation result of the 0.5λ 3 -pitch antenna layout.
Therefore, after the plurality of receiving antenna units 22 are divided into a plurality of groups of receiving antenna unit groups, the minimum spacing between two adjacent groups of receiving antenna unit groups can be adjusted according to actual needs.
It should be noted that, when the same receiving channel corresponds to a plurality of receiving antenna units 22, a phase difference brought by a space between two adjacent receiving antenna units 22 in front projection on a horizontal base plane may be an integer multiple of 2pi, so that the plurality of receiving antenna units 22 corresponding to the same receiving channel are used for connecting power dividers with equal power.
Similarly, for the case where the same transmission channel corresponds to a plurality of transmission antenna units 12, the phase difference brought by the space between the orthographic projections of two adjacent transmission antenna units 12 on the horizontal base plane may be an integer multiple of 2pi, so that the plurality of transmission antenna units 12 corresponding to the same transmission channel are used for the equal-power splitter connection.
For the transmitting antenna assembly 10, when the plurality of transmitting antenna units 12 includes a plurality of transmitting antenna unit groups, the minimum spacing between two adjacent antenna unit groups can be adjusted according to actual needs, and the phase difference caused by the spacing change needs to be compensated in the feeding network after the spacing adjustment.
In other embodiments, the technical solution of the present application may be applied to antenna array forms such as 2-transmit-4-receive, 4-transmit-4-receive, 16-transmit-16-receive, etc., which are not limited thereto and are not illustrated here. That is, the plurality of transmitting antenna units 12 and the plurality of receiving antenna units 22 form an n-transmit-m-receive MIMO antenna array, that is, n transmitting channels and m receiving channels are formed, each transmitting channel corresponds to at least one transmitting antenna unit 12, each receiving channel corresponds to at least one receiving antenna unit 22, and n and m are natural numbers greater than or equal to 2.
The present application also provides a radar, which includes the antenna module 100 described in the foregoing embodiments, specifically, the radar includes a radar chip and a feed network, where the radar chip is connected to the receiving antenna unit 22 and the transmitting antenna unit 12 of the antenna module 100 through the feed network, respectively. The radar of the embodiment of the application can realize larger detection coverage.
It should be noted that unless otherwise indicated, technical or scientific terms used in the embodiments of the present invention should be given the ordinary meanings as understood by those skilled in the art to which the embodiments of the present invention belong.
In the description of the embodiments of the present invention, the azimuth or positional relationship indicated by the technical terms "center", "thickness", "up", "down", "left", "right", "vertical", "horizontal", etc., are based on the azimuth or positional relationship shown in the drawings, are merely for convenience in describing the embodiments of the present invention and for simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific azimuth, be configured and operated in a specific azimuth, and thus should not be construed as limiting the embodiments of the present invention.
Furthermore, the technical terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. In the description of the embodiments of the present invention, the meaning of "plurality" is two or more unless explicitly defined otherwise.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present invention, and not for limiting the same; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the invention, and are intended to be included within the scope of the appended claims and description. In particular, the technical features mentioned in the respective embodiments may be combined in any manner as long as there is no structural conflict. The present invention is not limited to the specific embodiments disclosed herein, but encompasses all technical solutions falling within the scope of the claims.
Claims (9)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110620919.0A CN113471717B (en) | 2021-06-03 | 2021-06-03 | Antenna module and radar |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110620919.0A CN113471717B (en) | 2021-06-03 | 2021-06-03 | Antenna module and radar |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113471717A CN113471717A (en) | 2021-10-01 |
| CN113471717B true CN113471717B (en) | 2024-11-12 |
Family
ID=77872206
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110620919.0A Active CN113471717B (en) | 2021-06-03 | 2021-06-03 | Antenna module and radar |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113471717B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114325716A (en) * | 2021-12-24 | 2022-04-12 | 深圳市道通智能航空技术股份有限公司 | Radar device and unmanned aerial vehicle |
| CN114421146B (en) * | 2022-01-20 | 2024-05-17 | 深圳市塞防科技有限公司 | Radar and vehicle |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN211123248U (en) * | 2019-10-31 | 2020-07-28 | 上海保隆汽车科技股份有限公司 | Vehicle-mounted MIMO radar antenna layout structure |
Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8344943B2 (en) * | 2008-07-28 | 2013-01-01 | Physical Domains, LLC | Low-profile omnidirectional retrodirective antennas |
| IL221596A (en) * | 2012-08-23 | 2017-12-31 | Beeri Amir | System and method for volume visualization in ultra-wideband radar imaging system |
| WO2018115372A1 (en) * | 2016-12-23 | 2018-06-28 | Iee International Electronics & Engineering S.A. | High-resolution 3d radar wave imaging device |
| CN107275776A (en) * | 2017-06-30 | 2017-10-20 | 安徽四创电子股份有限公司 | A kind of SIW gaps crossfeed array antenna system |
| CN109546355B (en) * | 2018-11-28 | 2022-03-18 | 哈尔滨工业大学（威海） | Cylinder conformal printing antenna array device |
| CN109683159B (en) * | 2018-12-25 | 2023-06-09 | 上海匀羿电磁科技有限公司 | Vehicle-mounted section scanning ultra-wideband radar orientation method |
| US11360210B2 (en) * | 2019-07-02 | 2022-06-14 | Intel Corporation | Multi-mode multi-input multi-output (MIMO) radar sensors |
| CN110635235B (en) * | 2019-09-30 | 2021-02-09 | 南京微通电子技术有限公司 | Millimeter wave MIMO radar antenna and control method thereof |
| CN211698168U (en) * | 2019-10-31 | 2020-10-16 | 深圳市大疆创新科技有限公司 | Microwave antenna structure, microwave rotary radar and movable platform |
-
2021
- 2021-06-03 CN CN202110620919.0A patent/CN113471717B/en active Active
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN211123248U (en) * | 2019-10-31 | 2020-07-28 | 上海保隆汽车科技股份有限公司 | Vehicle-mounted MIMO radar antenna layout structure |
Also Published As
| Publication number | Publication date |
|---|---|
| CN113471717A (en) | 2021-10-01 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US4336543A (en) | Electronically scanned aircraft antenna system having a linear array of yagi elements | |
| EP2575210B1 (en) | Variable height radiating aperture | |
| JP2851338B2 (en) | Angle Positioning Radar System for Linear Phased Array Antenna | |
| CN103415939B (en) | Aerial array for ULTRA-WIDEBAND RADAR application | |
| US9379437B1 (en) | Continuous horn circular array antenna system | |
| US20090015498A1 (en) | Dual staggered vertically polarized variable azimuth beamwidth antenna for wireless network | |
| GB2360134A (en) | Dielectric resonator antenna array with steerable beams from each element | |
| JP2004507906A (en) | Dielectric resonator antenna array with steerable elements | |
| CN207852911U (en) | A kind of stripline antenna battle array based on continuous wave phased array | |
| US5017931A (en) | Interleaved center and edge-fed comb arrays | |
| CN113823891B (en) | Antenna module, millimeter wave radar and vehicle | |
| US8330668B2 (en) | Dual stagger off settable azimuth beam width controlled antenna for wireless network | |
| US12021304B2 (en) | Multi-beam antenna module | |
| CN113471717B (en) | Antenna module and radar | |
| WO2020113418A1 (en) | Millimeter wave antenna structure, microwave rotating radar and movable platform | |
| CN106935982B (en) | Planar array antenna | |
| WO2021072630A1 (en) | Antenna array, radar, and movable platform | |
| CN110581342A (en) | High-integration integrated efficient sum-difference beam waveguide antenna | |
| JP7610574B2 (en) | Vehicle antenna device and method of using and manufacturing same | |
| CN106953157A (en) | Antenna device for radar sensor | |
| KR102080305B1 (en) | Integral laminated patch array antenna | |
| CN113113781A (en) | Active phased array antenna line is presented | |
| KR101863681B1 (en) | Iff antenna | |
| US6930647B2 (en) | Semicircular radial antenna | |
| Nasr et al. | Active Windshield Antenna for 5G Applications |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| CB02 | Change of applicant information | ||
| CB02 | Change of applicant information |
Address after: 518000 401, Building B1, Nanshan Zhiyuan, No. 1001, Xueyuan Avenue, Changyuan Community, Taoyuan Street, Nanshan District, Shenzhen, Guangdong Applicant after: Shenzhen Saifang Technology Co.,Ltd. Address before: 518000 room 701, building B1, Nanshan wisdom garden, 1001 Xueyuan Avenue, Changyuan community, Taoyuan Street, Nanshan District, Shenzhen City, Guangdong Province Applicant before: Shenzhen Daotong Intelligent Automobile Co.,Ltd. |
|
| GR01 | Patent grant | ||
| GR01 | Patent grant |