A method for manufacturing a vehicle-mounted millimeter wave radar antenna array and application thereof

Abstract

The application belongs to the technical field of printed circuit board, and discloses a manufacturing method and application of a vehicle-mounted millimeter wave radar antenna array. The method comprises the following steps: performing reverse compensation on the length and / or width of the antenna array; and performing reverse compensation on the angle of the antenna array. In the PCB design stage, the application redefines the design requirements, and performs a reverse compensation manufacturing on the antenna array to meet the requirements of the antenna array. The manufacturing method provided by the application adopts a new design, performs a reverse compensation manufacturing on the antenna array in the PCB design stage, and meets the requirements of the antenna array. The manufacturing method provided by the application adopts a new design, realizes mass production of the vehicle-mounted millimeter wave radar board, and eliminates the phenomenon that the PCB does not meet the requirements of the customer in the manufacturing process. The detection of the reverse compensation of the antenna angle of the antenna array can calculate the reverse compensation angle of each array element of the transmitting array and the receiving array in the antenna matrix coordinate system when the signal is transmitted.

Description

Technical Field

[0001] This invention belongs to the field of printed circuit board technology, and particularly relates to a method for manufacturing and applying a vehicle-mounted millimeter-wave radar antenna array. Background Technology

[0002] Printed circuit boards (PCBs) are important electronic components. In the automotive field, automotive millimeter-wave radar is mainly divided into 24G and 77G types. 24G millimeter-wave radar is primarily used for short-to-medium range measurements, with relatively lower technological barriers and costs. It is widely used in blind spot monitoring and lane change assist, and is currently the mainstream millimeter-wave radar product on the market. 77G, on the other hand, is currently the most important long-range millimeter-wave radar product on the market, with a detection range of 150-250 meters and detection accuracy 3-5 times that of 24G radar. However, its technological barriers and costs are higher than 24G millimeter-wave radar, and it is currently mainly used in autonomous driving and forward collision warning systems.

[0003] Based on the above analysis, the existing technology has the following problems and defects: Currently, this type of PCB board millimeter-wave radar mainly uses antenna arrays for signal transmission and reception. The design and precise manufacturing of the antenna array requires a manufacturing tolerance of ±15um (including right angles, R angles, etc.). However, after PCB etching, the antenna array is prone to antenna right angles and R angles that do not meet customer requirements, resulting in product transmission delays or failures. Summary of the Invention

[0004] To overcome the problems existing in related technologies, the present invention discloses a method for manufacturing and applying a vehicle-mounted millimeter-wave radar antenna array.

[0005] The technical solution is as follows: A method for manufacturing a vehicle-mounted millimeter-wave radar antenna array, comprising the following steps:

[0006] S1, perform antenna length and / or width inverse compensation on the antenna array;

[0007] S2 performs inverse compensation on the antenna angle of the antenna array.

[0008] In step S1, antenna length inverse compensation is performed on the right angle of the antenna array.

[0009] In step S1, antenna width inverse compensation is performed on the right angle of the antenna array.

[0010] In step S1, the antenna length and width are inversely compensated for the right angle of the antenna array.

[0011] In step S1, the antenna length and / or width of the antenna array are inversely compensated by 50 micrometers.

[0012] In step S2, a 30° angle inverse compensation is performed on the right-angle position of the antenna array; a 30° angle inverse compensation is performed on the R-angle position of the antenna array.

[0013] In step S2, the detection method for inverse compensation of the antenna angle of the antenna array includes:

[0014] S2.1, Establish the antenna matrix coordinate system, and determine the coordinates of each element of the transmitting array and receiving array in the antenna matrix coordinate system according to the design parameters of the angle inverse compensation antenna;

[0015] S2.2, Based on the design parameters of the angle inverse compensation antenna, use optical measurement methods to obtain the coordinates of the origin of the antenna matrix coordinate system in the world coordinate system, as well as the attitude angle of the antenna matrix coordinate system relative to the world coordinate system, and construct the angle inverse compensation matrix between the antenna matrix coordinate system and the world coordinate system.

[0016] S2.3, Based on the coordinates of each element of the transmitting and receiving arrays in the antenna matrix coordinate system, calculate the inverse compensation angle of each element of the transmitting and receiving arrays in the antenna matrix coordinate system at the time of signal transmission.

[0017] In step S2.1, determining the coordinates of each element of the transmitting array and receiving array in the antenna matrix coordinate system includes: using... and The coordinates of the transmitting array and the receiving array are respectively represented by the superscripts Tr and Rr, which represent the transmitting array and the receiving array, respectively. The subscript S represents the antenna matrix coordinate system, and the subscript i represents the element number of the receiving array, i = 1, 2...M, where M represents the number of receiving array elements contained in the antenna array.

[0018] In step S2.2, a world coordinate system, denoted by P0, is established based on the antenna array mounting reference plane; an antenna matrix coordinate system, denoted by P, is established based on the antenna array design parameters; and the coordinates of the antenna array centroid Op in the world coordinate system are obtained using optical measurement methods in conjunction with the antenna array design parameters. And the attitude angle from the world coordinate system to the antenna matrix coordinate system after inverse compensation, respectively, is expressed as the offset angle. Pitch angle Roll angle Representation; Constructing the antenna matrix coordinate system With world coordinate system Between and angle inverse compensation matrix and

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[0033] In the formula, (·) T Indicates the transpose operation;

[0034] Based on the design parameters of the angle-compensated antenna, the coordinates of the origin of the antenna matrix coordinate system in the world coordinate system are obtained using optical measurement methods. And the attitude angles from the world coordinate system to the antenna matrix coordinate system after inverse compensation, respectively represented by the offset angles. Pitch angle Roll angle This indicates the construction of the antenna matrix coordinate system and the world coordinate system. and angle inverse compensation matrix

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[0049] Based on the angle inverse compensation matrix from the world coordinate system to the antenna matrix coordinate system And the angle inverse compensation matrix from the antenna matrix coordinate system to the world coordinate system Construct the angle inverse compensation matrix between the transmitting array and the receiving array lines.

[0050] Another objective of this invention is to provide an application of the aforementioned method for manufacturing vehicle-mounted millimeter-wave radar antenna arrays in the fabrication of vehicle-mounted millimeter-wave radar antenna arrays.

[0051] Another objective of this invention is to provide an application of the aforementioned method for manufacturing vehicle-mounted millimeter-wave radar antenna arrays on printed circuit boards for millimeter-wave radar in autonomous driving and forward collision warning systems.

[0052] Combining all the above technical solutions, the advantages and positive effects of this invention are as follows: In the PCB design stage, this invention redefines design requirements by performing a reverse compensation process on the antenna array to meet the requirements of the antenna array. The manufacturing method provided by this invention adopts a completely new design, enabling mass production of automotive millimeter-wave radar boards; it eliminates the phenomenon of PCBs failing to meet customer requirements during the manufacturing process. This invention performs reverse compensation detection on the antenna array, which can calculate the reverse compensation angles of each element of the transmitting and receiving arrays in the antenna matrix coordinate system at the moment of signal transmission. Attached Figure Description

[0053] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this disclosure and, together with the description, serve to explain the principles of this disclosure;

[0054] Figure 1 This is a flowchart of the manufacturing method of a vehicle-mounted millimeter-wave radar antenna array provided in an embodiment of the present invention;

[0055] Figure 2 This is a schematic diagram of a vehicle-mounted millimeter-wave radar antenna array provided in an embodiment of the present invention;

[0056] Figure 3 The diagram provided in this embodiment of the invention does not show the effect of inverse compensation of the antenna array for the antenna and / or width, and the antenna angle.

[0057] Figure 4 This is an illustration of the effect of the present invention performing inverse compensation on the antenna array for antenna width and / or antenna angle, as provided in the embodiments of the present invention.

[0058] Figure 5 The diagram shows the improved antenna array defects provided by the embodiments of the present invention, which meet the design requirements. Detailed Implementation

[0059] To make the above-mentioned objects, features, and advantages of the present invention more apparent and understandable, specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of the present invention. However, the present invention can be practiced in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0060] Example 1, as Figure 1 As shown, the method for manufacturing a vehicle-mounted millimeter-wave radar antenna array provided in this embodiment of the invention includes:

[0061] S1, perform antenna and / or wide anti-inversion compensation on the antenna array;

[0062] S2 performs inverse compensation on the antenna angle of the antenna array.

[0063] In a preferred embodiment of the invention, in step S1, antenna length and / or width inverse compensation is performed on the right angle or R angle of the antenna array.

[0064] In a preferred embodiment of the invention, in step S1, the antenna length and / or width of the antenna array are compensated by 50 micrometers for the right angle or R angle.

[0065] In a preferred embodiment of the invention, in step S2, a 30° angle inverse compensation is performed on the right-angle or R-angle position of the antenna array.

[0066] Furthermore, in step S2, the detection method for inverse compensation of the antenna angle of the antenna array includes:

[0067] S2.1, Establish the antenna matrix coordinate system, and determine the coordinates of each element of the transmitting array and receiving array in the antenna matrix coordinate system according to the design parameters of the angle inverse compensation antenna;

[0068] S2.2, Based on the design parameters of the angle inverse compensation antenna, use optical measurement methods to obtain the coordinates of the origin of the antenna matrix coordinate system in the world coordinate system, as well as the attitude angle of the antenna matrix coordinate system relative to the world coordinate system, and construct the angle inverse compensation matrix between the antenna matrix coordinate system and the world coordinate system.

[0069] S2.3, Based on the coordinates of each element of the transmitting and receiving arrays in the antenna matrix coordinate system, calculate the inverse compensation angle of each element of the transmitting and receiving arrays in the antenna matrix coordinate system at the time of signal transmission.

[0070] In step S2.1, the antenna matrix coordinate system is established by determining the coordinates of each element of the transmitting and receiving arrays in the antenna matrix coordinate system based on the design parameters of the angle-compensated antenna. This is done using... and The diagram shows the antenna array, where the superscripts Tr and Rr represent the transmitting array and the receiving array, respectively; the subscript S represents the antenna matrix coordinate system; and the subscript i represents the receiving array element number, i = 1, 2, ..., M, where M represents the number of receiving array elements contained in the antenna array.

[0071] In step S2.2, a world coordinate system, denoted by P0, is established based on the antenna array mounting reference plane; an antenna matrix coordinate system, denoted by P, is established based on the antenna array design parameters; and the centroid O of the antenna array is obtained using optical measurement methods in conjunction with the antenna array design parameters. p Coordinates in the world coordinate system

[0072] Pitch angle Roll angle Representation; Constructing the relationship between the antenna matrix coordinate system and the world coordinate system and angle inverse compensation matrix

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[0087] In the formula, (·) T Indicates the transpose operation;

[0088] Based on the design parameters of the angle-compensated antenna, optical measurement methods are used to obtain the coordinates of the origin of the antenna matrix coordinate system in the world coordinate system. And the attitude angles from the world coordinate system to the antenna matrix coordinate system after inverse compensation, respectively represented by the offset angles. Pitch angle Roll angle This indicates the construction of the antenna matrix coordinate system and the world coordinate system. and angle inverse compensation matrix

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[0103] Based on the angle inverse compensation matrix from the world coordinate system to the antenna matrix coordinate system And the angle inverse compensation matrix from the antenna matrix coordinate system to the world coordinate system Construct the angle inverse compensation matrix between the transmitting array and the receiving array lines.

[0104] Example 2, as another embodiment of the present invention, employs a novel design to perform anti-compensation on the antenna array. This involves a 50-micrometer length / width, 30° angle anti-compensation design at the right-angle position of the antenna array. This entirely new design enables mass production of automotive millimeter-wave radar boards, eliminating the problem of PCBs failing to meet customer requirements during manufacturing. The manufactured automotive millimeter-wave radar antenna array is shown below. Figure 2 As shown.

[0105] Example 3, as an application implementation of the present invention, provides a millimeter-wave radar printed circuit board for autonomous driving and forward collision warning, wherein the millimeter-wave radar printed circuit board is fabricated using the vehicle-mounted millimeter-wave radar antenna array.

[0106] In the above embodiments, the descriptions of each embodiment have different focuses. For parts that are not described in detail or recorded in a certain embodiment, please refer to the relevant descriptions of other embodiments.

[0107] Experiment: such as Figure 3 As shown, the prior art does not provide an effect diagram of inverse compensation for antenna array antenna and / or width, as well as antenna angle;

[0108] like Figure 4 The diagram shows the effect of the present invention in performing inverse compensation on the antenna array for antenna width and / or antenna angle.

[0109] This invention improves upon the aforementioned technical solution to address antenna array defects and meets design requirements. See the effect diagram below. Figure 5 As shown.

[0110] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any modifications, equivalent substitutions and improvements made by those skilled in the art within the scope of the technology disclosed in the present invention and within the spirit and principles of the present invention should be covered within the scope of protection of the present invention.

Claims

1. A method of fabricating a vehicular millimeter wave radar antenna array, comprising: The method includes the following steps: S1, perform antenna length and / or width inverse compensation on the antenna array; S2, performs inverse compensation on the antenna angle of the antenna array; In step S2, the detection method for inverse compensation of the antenna angle of the antenna array includes: S2.1, Establish the antenna matrix coordinate system, and determine the coordinates of each element of the transmitting array and receiving array in the antenna matrix coordinate system according to the design parameters of the angle inverse compensation antenna; S2.2, Based on the design parameters of the angle inverse compensation antenna, use optical measurement methods to obtain the coordinates of the origin of the antenna matrix coordinate system in the world coordinate system, as well as the attitude angle of the antenna matrix coordinate system relative to the world coordinate system, and construct the angle inverse compensation matrix between the antenna matrix coordinate system and the world coordinate system. S2.3, Based on the coordinates of each element of the transmitting array and the receiving array in the antenna matrix coordinate system, calculate the inverse compensation angle of each element of the transmitting array and the receiving array in the antenna matrix coordinate system at the time of signal transmission. In step S2.1, determining the coordinates of each element of the transmitting array and receiving array in the antenna matrix coordinate system includes: using... and These represent the coordinates of the transmitting array and the receiving array, respectively, where the superscript... and These represent the transmitting array and the receiving array, respectively, with subscripts. Indicates the antenna matrix coordinate system, subscript Indicates the array element number of the receiving array. , Indicates the number of receiver array elements contained in the antenna array; In step S2.2, the world coordinate system is established based on the antenna array mounting reference plane, using... Indicate; based on the design parameters of the antenna array, establish the antenna matrix coordinate system, using... This indicates that, based on the design parameters of the antenna array, the centroid of the antenna array is obtained using optical measurement methods. Coordinates in the world coordinate system And the attitude angle from the world coordinate system to the antenna matrix coordinate system after inverse compensation, respectively, is expressed as the offset angle. Pitch angle Roll angle Representation; Constructing the antenna matrix coordinate system With world coordinate system Between and angle inverse compensation matrix and ; in, In the formula, denotes a transposition operation; Based on the design parameters of the angle-compensated antenna, the coordinates of the origin of the antenna matrix coordinate system in the world coordinate system are obtained using optical measurement methods. And the attitude angle from the world coordinate system to the antenna matrix coordinate system after inverse compensation, respectively represented by the offset angle. Pitch angle Roll angle This indicates the construction of the antenna matrix coordinate system and the world coordinate system. and angle inverse compensation matrix ; in, angle de-compensation matrix from world coordinate system to antenna matrix coordinate system and angle de-compensation matrix from antenna matrix coordinate system to world coordinate system , constructing angle de-compensation matrix between transmit array, receive array line 2. The method of claim 1, wherein the method further comprises: In step S1, antenna length inverse compensation is performed on the right angle of the antenna array.

3. The method of claim 1, wherein the method further comprises: In step S1, antenna width inverse compensation is performed on the right angle of the antenna array.

4. The method of claim 1, wherein, In step S1, the antenna length and width are inversely compensated for the right angle of the antenna array.

5. The method of claim 1, wherein, In step S1, the antenna length and / or width of the antenna array are inversely compensated by 50 micrometers.

6. The method of claim 1, wherein, In step S2, a 30° angle inverse compensation is performed on the right-angle position of the antenna array; a 30° angle inverse compensation is performed on the R-angle position of the antenna array.

7. The application of the method for manufacturing a vehicle-mounted millimeter-wave radar antenna array according to any one of claims 1-6 in the manufacturing of vehicle-mounted millimeter-wave radar antenna arrays.

8. The application of a method for manufacturing an on-board millimeter-wave radar antenna array according to any one of claims 1-6 on a millimeter-wave radar printed circuit board for autonomous driving and forward collision warning.

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