CN114256611B - Manufacturing constraint method, measuring method and device for millimeter wave radar printed antenna - Google Patents
Manufacturing constraint method, measuring method and device for millimeter wave radar printed antenna Download PDFInfo
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- CN114256611B CN114256611B CN202111349997.8A CN202111349997A CN114256611B CN 114256611 B CN114256611 B CN 114256611B CN 202111349997 A CN202111349997 A CN 202111349997A CN 114256611 B CN114256611 B CN 114256611B
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/36—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith
- H01Q1/38—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith formed by a conductive layer on an insulating support
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B21/00—Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant
- G01B21/22—Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant for measuring angles or tapers; for testing the alignment of axes
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K3/00—Apparatus or processes for manufacturing printed circuits
- H05K3/10—Apparatus or processes for manufacturing printed circuits in which conductive material is applied to the insulating support in such a manner as to form the desired conductive pattern
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P90/00—Enabling technologies with a potential contribution to greenhouse gas [GHG] emissions mitigation
- Y02P90/30—Computing systems specially adapted for manufacturing
Abstract
The application discloses a manufacturing constraint method, a measuring method and a measuring device for a millimeter wave radar printed antenna, and belongs to the field of printed antenna design. The method mainly comprises the following steps: determining an angle of an outer intersection point position in the millimeter wave radar printed antenna graph as an outer angle, wherein the outer angle comprises a first edge, a second edge and a third edge; and respectively extending the intersection of the first side and the third side at an external angle intersection point, calculating the vertical distance from the external angle intersection point to the second side, and taking the vertical distance as an external angle manufacturing error, wherein if the external angle manufacturing error is smaller than or equal to a preset external angle error threshold value, the external angle is qualified. According to the application, through the relation between the external angle manufacturing error of the external angle in the millimeter wave radar printed antenna graph obtained through calculation and the preset external angle error threshold value, the qualification of the external angle is judged, so that the influence on the performance in the actual processing process is avoided, and meanwhile, the image distortion of the antenna after the actual processing is avoided, so that the actually processed millimeter wave radar printed antenna is maximally matched with the original design.
Description
Technical Field
The application relates to the field of printed antenna design, in particular to a manufacturing constraint method, a measuring method and a measuring device for a millimeter wave radar printed antenna.
Background
Along with the continuous application of millimeter wave radar in industries such as auxiliary driving system, internet of things, unmanned aerial vehicle, security protection and sports, the required quantity is greatly increased, and the millimeter wave radar is more sensitive to cost. The prior art adopts a copper sheet antenna printed on a Printed Circuit Board (PCB) which is evolved from the original mode of welding an antenna module to realize the function of the millimeter wave radar antenna. However, in practical processing, due to the etching capability, there is a large difference between the printed antenna pattern produced and the original design pattern. The IPC industry standard of the conventional PCB cannot meet the frequency improvement of the millimeter wave radar antenna from 24GHz to 79GHz, wherein the external angle and the internal angle of the printed antenna are not constrained in the IPC industry standard of the conventional PCB, the constraint of the outline precision corresponding to the outline of the pattern of the printed antenna and the copper thickness set to be [ -10%,10% ] is not suitable for manufacturing the millimeter wave radar printed antenna, and the millimeter wave radar printed antenna manufactured according to the existing standard further brings the problems of gain reduction, center frequency offset and inconsistent channels.
In the prior art, there are two solutions to the above-mentioned problems: (1) An antenna in the form of a welding component is adopted to avoid etching errors; (2) The performance influence caused by the processing error is compensated by means of pre-emphasis and filtering through software and hardware system adjustment. The antenna in the form of a welding component is adopted to avoid etching errors, so that the manufacturing cost is high, and the antenna element is required to be additionally purchased and welded; aiming at the problem of the method (2), the performance influence caused by the processing error is compensated by means of pre-emphasis and filtering through software and hardware system adjustment, the implementation process is complex, and the system design margin is reduced.
Disclosure of Invention
Aiming at the problems that the current industry general standard in the prior art cannot meet the requirement of the precision of a printed millimeter wave radar antenna, and the printed millimeter wave radar antenna manufactured according to the current standard further brings about gain reduction, center frequency deviation and inconsistent channels, the application mainly provides a manufacturing constraint method, a measuring method and a device of the printed millimeter wave radar antenna.
In order to achieve the above purpose, the application adopts a technical scheme that: the manufacturing constraint method for the millimeter wave radar printed antenna comprises the following steps: determining an angle of an outer intersection point position in a millimeter wave radar printed antenna graph as an outer angle, wherein the outer angle comprises a first side, a second side and a third side, an extension line of the first side is perpendicular to an extension line of the third side, and the second side is respectively connected with the first side and the second side; and respectively extending the intersection of the first side and the third side at an external angle intersection point, calculating the vertical distance from the external angle intersection point to the second side, and taking the vertical distance as an external angle manufacturing error, wherein if the external angle manufacturing error is smaller than or equal to a preset external angle error threshold value, the external angle is qualified.
The application adopts another technical scheme that: provided is a measuring method of millimeter wave radar printed antenna, comprising: determining an angle of an outer intersection point position in a millimeter wave radar printed antenna graph as an outer angle, wherein the outer angle comprises a first side, a second side and a third side, an extension line of the first side is perpendicular to an extension line of the third side, and the second side is respectively connected with the first side and the second side; respectively extending the intersection of the first edge and the third edge at an external angle intersection; and measuring the vertical distance from the intersection point of the external angle to the second edge to obtain an external angle manufacturing error corresponding to the external angle, wherein the external angle manufacturing error is used for judging the qualification of the external angle.
The application adopts another technical scheme that: provided is a measuring device of millimeter wave radar printed antenna, comprising: the external angle measurement module is used for measuring the external angle of the millimeter wave radar printed antenna, wherein the external angle measurement module comprises a module for determining the angle of the position of the outer intersection point in the millimeter wave radar printed antenna graph as the external angle, and the external angle comprises a first side, a second side and a third side, wherein the extension line of the first side is perpendicular to the extension line of the third side, and the second side is respectively connected with the first side and the third side; means for extending the intersection of the first edge and the third edge at an external corner intersection point, respectively; and a module for measuring the vertical distance from the intersection point of the external angle to the second side to obtain an external angle manufacturing error corresponding to the external angle, wherein the external angle manufacturing error is used for judging the qualification of the external angle.
The technical scheme of the application has the following beneficial effects: the application designs a manufacturing constraint method, a measuring method and a device for a millimeter wave radar printed antenna. According to the application, through newly designing the constraint of the external angle manufacturing error, the qualification of the external angle is judged through the relation between the external angle manufacturing error of the external angle in the millimeter wave radar printed antenna graph obtained through calculation and the preset external angle error threshold value, so that the influence on the performance in the actual processing process is avoided, meanwhile, the image distortion of the antenna after the actual processing is avoided, the actually processed millimeter wave radar printed antenna is matched with the original design to the greatest extent, and the consistency of antenna batches is ensured.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, and it is obvious that the drawings in the following description are some embodiments of the present application, and other drawings may be obtained according to the drawings without inventive effort to a person skilled in the art.
FIG. 1 is a schematic diagram of an original design of a millimeter wave radar printed antenna in a method of manufacturing constraints for the millimeter wave radar printed antenna of the present application;
FIG. 2 is a graphic of a millimeter wave radar printed antenna processed in the fabrication constraint method of the millimeter wave radar printed antenna of the present application;
FIG. 3 is a schematic diagram of one embodiment of a method of manufacturing constraints for a millimeter wave radar printed antenna of the present application;
FIG. 4 is a schematic diagram showing a specific example of the outer corners of the millimeter wave radar printed antenna pattern after the middle process of the method for manufacturing the millimeter wave radar printed antenna of the present application;
fig. 5 is a schematic view showing a specific example of an inner corner of a millimeter wave radar printed antenna pattern after processing in the method for manufacturing a constraint of a millimeter wave radar printed antenna according to the present application;
FIG. 6 is a schematic diagram of one embodiment of a method of measuring a millimeter wave radar printed antenna of the present application;
the drawings are as follows: (1) -first side, (2) -second side, (3) -third side, (4) -fourth side, (5) -fifth side, (6) -sixth side, d 1-external angle manufacturing error, d 2-internal angle manufacturing error.
Specific embodiments of the present application have been shown by way of the above drawings and will be described in more detail below. The drawings and the written description are not intended to limit the scope of the inventive concepts in any way, but rather to illustrate the inventive concepts to those skilled in the art by reference to the specific embodiments.
Detailed Description
The preferred embodiments of the present application will be described in detail below with reference to the accompanying drawings so that the advantages and features of the present application can be more easily understood by those skilled in the art, thereby making clear and defining the scope of the present application.
It is noted that relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising … …" does not exclude the presence of other like elements in a process, method, article or apparatus that comprises the element.
Along with the continuous application of millimeter wave radar in industries such as auxiliary driving system, internet of things, unmanned aerial vehicle, security protection and sports, the required quantity is greatly increased, and the millimeter wave radar is more sensitive to cost. The prior art adopts a copper sheet antenna printed on a Printed Circuit Board (PCB) which is evolved from the original mode of welding an antenna module to realize the function of the millimeter wave radar antenna. However, in practical processing, due to the etching capability, there is a large difference between the printed antenna pattern produced and the original design pattern. The IPC industry standard of the conventional PCB cannot meet the requirement that the frequency of the millimeter wave radar antenna is increased from 24GHz to 79GHz, and the method further brings the problems of gain reduction, center frequency offset and inconsistent channels.
The conventional original printed millimeter wave radar antenna is shown in fig. 1, and the inner angle and the outer angle of the graph in the frame line exist, wherein the positions of the outer vertexes of all the printed millimeter wave radar antennas are defined as the outer angles, and the point A is shown in fig. 1; the inner intersection positions of all the printed millimeter wave radar antennas are defined as inner angles, as shown in a point B in fig. 1, and the outer edge sizes of all the printed millimeter wave radar antennas are defined as the outer outlines of the patterns, as shown in a point C in fig. 1. In the actual processing process, the existing process capability of a processing plant cannot realize the consistency of the angle with the original design, the internal angle and the external angle after the actual processing are arc-shaped, and the constraint of +/-10% of the line impedance error value of copper thickness and graph outline according to the original design is not suitable for manufacturing millimeter wave radar printed antennas; and the actual processing of the printed millimeter wave radar antenna pattern has larger difference between the outer contour and the design value, and the actual processing result is shown in fig. 2, which directly affects the antenna performance of the millimeter wave radar and cannot reach the pre-simulated index and the expected performance set value.
In the prior art, there are two solutions to the above-mentioned problems: (1) An antenna in the form of a welding component is adopted to avoid etching errors; (2) The performance influence caused by the processing error is compensated by means of pre-emphasis and filtering through software and hardware system adjustment. The antenna in the form of a welding component is adopted to avoid etching errors, so that the manufacturing cost is high, and the antenna element is required to be additionally purchased and welded; aiming at the problem of the method (2), the performance influence caused by the processing error is compensated by means of pre-emphasis and filtering through software and hardware system adjustment, the implementation process is complex, and the system design margin is reduced.
The application is characterized in that: newly designing constraint of an external angle manufacturing error, and judging the qualification of the external angle through the relation between the external angle manufacturing error of the external angle in the millimeter wave radar printed antenna graph obtained through calculation and a preset external angle error threshold value; calculating the relationship between the internal angle manufacturing error of the internal angle in the millimeter wave radar printed antenna graph and a preset internal angle error threshold value, and judging the qualification of the internal angle; judging the qualification of the copper thickness by calculating the relation between the copper thickness in a preset area and a copper thickness error threshold value of the preset area in the millimeter wave radar printed antenna graph; the method solves the problem that the current industry general standard cannot meet the requirement of printing millimeter wave radar antenna precision, and indicates the key point of control and specific acceptable error value when the millimeter wave radar antenna pattern is actually processed; the method has the advantages that the influence on performance in the actual processing process is avoided, meanwhile, the distortion of antenna images after the actual processing is avoided, the actually processed millimeter wave radar printed antenna is matched with the original design to the greatest extent, the production and the processing are easy, all design indexes of the printed millimeter wave radar antenna are completely realized, and the consistency of antenna batches is ensured.
The following describes the technical scheme of the present application and how the technical scheme of the present application solves the above technical problems in detail with specific embodiments.
Fig. 3 illustrates one embodiment of a method of manufacturing constraints for a millimeter wave radar printed antenna of the present application.
In the specific embodiment shown in fig. 3, the method for manufacturing and restraining the millimeter wave radar printed antenna mainly comprises the following steps:
step S301, determining an angle of an outer intersection point position in a millimeter wave radar printed antenna graph as an outer angle, wherein the outer angle comprises a first side, a second side and a third side, an extension line of the first side is perpendicular to an extension line of the third side, and the second side is connected with the first side and the second side respectively;
step S302, respectively extending the intersection of the first side and the third side at an external angle intersection point, calculating the vertical distance from the external angle intersection point to the second side, and taking the vertical distance as an external angle manufacturing error, wherein if the external angle manufacturing error is smaller than or equal to a preset external angle error threshold value, the external angle is qualified.
In the specific embodiment, as the external angle is not restrained in the prior art, and the final effect is not right angle due to the etching of the liquid medicine in the actual processing, the antenna performance of the millimeter wave radar is affected, the pre-simulated index and the expected performance set value cannot be reached, and the consistency of the antenna batch cannot be ensured; the method comprises the steps of firstly determining the external angle of a millimeter wave radar printed antenna pattern, wherein the external angle consists of a first side, a second side and a third side, the first side and the third side are straight lines, and the extension line of the first side is perpendicular to the extension line of the third side; the second edge is connected to the first edge and the third edge, respectively, wherein the second edge includes, but is not limited to, a straight line and an arc. And respectively extending the first side and the third side to ensure that the two straight lines intersect at an external angle intersection point, calculating the vertical distance between the external angle intersection point and the second side, taking the vertical distance as an external intersection manufacturing error corresponding to the external angle, judging the external angle as qualified when the external angle manufacturing error is smaller than or equal to a preset external angle error threshold value, and judging the external angle as unqualified when the external angle manufacturing error is larger than the preset external angle error threshold value. Through presetting the external angle error threshold value, the qualification of the printed antenna is improved, so that in the actual processing process, the external angles of the printed antennas in the same batch are smaller than or equal to the preset external angle error threshold value, the processing influence of the external angles is avoided, the consistency of antenna batches is ensured, and meanwhile, the condition that the antenna performance of the millimeter wave radar is influenced due to overlarge external angle manufacturing errors is avoided.
In an alternative embodiment of the present application, fig. 4 shows a specific example of the outer corners of the millimeter wave radar printed antenna pattern after processing in the method for manufacturing constraint of the millimeter wave radar printed antenna of the present application. When the second side of the processed printed antenna pattern is an arc line as shown in fig. 4 (a), calculating the vertical distance between the intersection point of the external angle corresponding to the external angle and the arc line, and taking the distance as the manufacturing error of the external angle corresponding to the external angle, namely d1 shown in fig. 4 (a); when the second side of the processed printed antenna pattern is a straight line as shown in fig. 4 (b), the second side corresponding to the outer angle is perpendicular to the intersection of the outer angles, and the length of the perpendicular is calculated, and the length is taken as the outer angle manufacturing error corresponding to the outer angle, namely d1 shown in fig. 4 (b).
In an alternative embodiment of the application, the preset external angle error threshold value in the manufacturing constraint method of the millimeter wave radar printed antenna is 15 micrometers.
Preferably, for the highest frequency of 77GHz-81GHz, after testing the antenna of the millimeter wave radar obtained by actual processing, it is known that when the external angle manufacturing error is controlled to be 15UM, the antenna of the millimeter wave radar after actual processing is most coincident with the original design, and the influence of the external angle on the antenna performance of the millimeter wave radar after actual processing can be avoided, so that 15UM is used as the optimal solution of the external angle manufacturing error, that is, the preset external angle error threshold is set to be 15UM. In the low frequency band, a proper relaxation of the preset external angle error threshold can also achieve the technical effect consistent with the above example.
In an alternative embodiment of the present application, the method for manufacturing the millimeter wave radar printed antenna further includes: determining the position angle of an inner side junction in the millimeter wave radar printed antenna graph as an inner angle, wherein the inner angle comprises a fourth side, a fifth side and a sixth side, an extension line of the fourth side is perpendicular to an extension line of the sixth side, and the fifth side is respectively connected with the fourth side and the sixth side; respectively extending the intersection of the fourth side and the sixth side at an inner angle intersection point, calculating the vertical distance from the inner angle intersection point to the fifth side, and taking the vertical distance as an inner angle manufacturing error; and if the internal angle manufacturing error is smaller than or equal to a preset internal angle error threshold value, the internal angle is qualified.
In the specific embodiment, since the internal angle is not constrained in the prior art, and the final effect is not right angle due to the etching of the liquid medicine in the actual processing, the antenna performance of the millimeter wave radar is affected, the expected simulation index and the expected performance set value cannot be reached, and the consistency of the antenna batch cannot be ensured; the method comprises the steps of firstly determining the inner angle of a millimeter wave radar printed antenna pattern, wherein the inner angle consists of a fourth side, a fifth side and a sixth side, the fourth side and the sixth side are straight lines, and the extension line of the fourth side is perpendicular to the extension line of the sixth side; the fifth side is connected to the fourth side and the sixth side, respectively, wherein the fourth side includes but is not limited to a straight line and an arc. And respectively extending the fourth side and the sixth side so that the two straight lines intersect at an inner angle intersection point, calculating the vertical distance between the inner angle intersection point and the fifth side, taking the vertical distance as an inner intersection manufacturing error corresponding to the inner angle, judging the inner angle as qualified when the inner angle manufacturing error is smaller than or equal to a preset inner angle error threshold value, and judging the inner angle as unqualified when the inner angle manufacturing error is larger than the preset inner angle error threshold value. Through presetting the inner angle error threshold value, the qualification of the printed antenna is improved, and the inner angles of the printed antennas in the same batch are smaller than or equal to the preset inner angle error threshold value in the actual processing process, so that the processing influence of the inner angles is avoided, the consistency of antenna batches is ensured, and meanwhile, the condition that the antenna performance of the millimeter wave radar is influenced by overlarge inner angle manufacturing errors is avoided.
In an alternative embodiment of the present application, fig. 5 is a specific example of an interior angle of a millimeter wave radar printed antenna pattern processed in the method for manufacturing a constraint of a millimeter wave radar printed antenna of the present application. When the processed inner angle of the printed antenna pattern is shown as (a) in fig. 5, and the fifth edge is an arc, calculating the vertical distance between the intersection point of the inner angle corresponding to the inner angle and the arc, and taking the distance as the inner angle manufacturing error corresponding to the inner angle, namely d2 shown as (a) in fig. 5; when the processed internal angle of the printed antenna pattern is shown in fig. 5 (b), and the fifth edge is a straight line, a perpendicular line is drawn to the fifth edge corresponding to the internal angle through the intersection point of the internal angle, the length of the perpendicular line is calculated, and the length is used as the internal angle manufacturing error corresponding to the internal angle, namely d2 shown in fig. 5 (b).
In an alternative embodiment of the application, the preset internal angle error threshold is 20 microns in the method for manufacturing the millimeter wave radar printed antenna.
Preferably, for the highest frequency of 77GHz-81GHz, after testing the antenna of the millimeter wave radar obtained by actual processing, it is known that when the internal angle manufacturing error is controlled to be 20UM, the antenna of the millimeter wave radar after actual processing is most coincident with the original design, and the influence of the internal angle on the antenna performance of the millimeter wave radar after actual processing can be avoided, so that 20UM is used as the optimal solution of the internal angle manufacturing error, that is, the preset internal angle error threshold is set to be 20UM. In the low frequency band, a proper relaxation of the preset internal angle error threshold can also achieve the technical effect consistent with the above example. In an alternative embodiment of the present application, the method for manufacturing the millimeter wave radar printed antenna further includes: calculating the outline precision of the figure outline of the millimeter wave radar printed antenna figure; if the contour precision is within the preset contour precision error threshold range, the outer contour of the graph is qualified, and the preset contour precision error threshold range is [ -15, 15] microns.
In this alternative embodiment, as can be seen from the original design and the above of fig. 1, since the inner angle and the outer angle of each antenna in the millimeter wave radar are etched by the liquid medicine, the inner angle and the outer angle are not right angles, so that the outer contour of the pattern of the antenna in the processed printed antenna is also biased, the performance of the antenna is affected, the pre-simulated index and the expected performance set value cannot be reached, and the consistency of the antenna batch cannot be ensured, wherein the contour precision is the error of the overlapping comparison between the original design pattern 1:1 and the actual processed pattern after printing the drawing; and comparing the contour precision corresponding to the contour of the graph with a preset contour precision error threshold range, and judging the qualification of the contour of the graph, wherein the contour of the graph is qualified when the contour precision is within the preset contour precision error threshold range, and the contour of the graph is unqualified when the contour precision exceeds the contour precision error threshold range. In the actual processing process, the contour precision of the printed antennas in the same batch is within the range of a preset contour precision error threshold, so that the processing influence of the outer edge of the antenna is avoided, the consistency of the antenna batch is ensured, and the condition that the influence of the overlarge contour precision error on the antenna performance of the millimeter wave radar is avoided.
Preferably, after testing the antenna of the millimeter wave radar obtained by actual processing at the highest frequency of 77GHz-81GHz, it is known that when the outline corresponding outline precision manufacturing error of the figure outline is controlled to be +/-15 UM, the antenna of the millimeter wave radar after actual processing is most coincident with the original design, and the influence of the outline precision on the antenna performance of the millimeter wave radar after actual processing can be avoided, so that +/-15 UM is used as an optimal solution of the outline precision manufacturing error, namely, a preset outline precision error threshold range is set to be +/-15 UM. For example, the original design includes a square with 0.5 x 0.5mm, and when the preset profile accuracy error threshold range is set to be ±15UM, it means that in the actual machining process, each side of the square is allowed to have an error of ±15 UM; or a line with a line width of 100UM and a length of 800UM is included in the bathroom design, when the preset contour precision error threshold range is set to be +/-15 UM, the length and the width of the line are allowed to have errors of +/-15 UM in the actual machining process.
Optionally, in the low frequency band, a suitable widening of the preset contour precision error threshold range may also achieve a technical effect consistent with the above example.
In an alternative embodiment of the present application, the method for manufacturing the millimeter wave radar printed antenna further includes: calculating a copper thickness manufacturing error in a preset area in a millimeter wave radar printed antenna graph; if the copper thickness manufacturing error is within the preset copper thickness error threshold range, the copper thickness is qualified, and the preset copper thickness manufacturing error threshold range is [ -8,8] microns.
In the alternative embodiment, the millimeter wave radar antenna generally adopts a Rogers series radio frequency special copper-clad plate and adopts liquid medicine to carry out film coating etching according to an original design pattern transferred by a film negative film, other layers of the laminated board can adopt FR4 with low cost so as to reduce the cost and the production difficulty of the whole product, copper thickness of each area of the millimeter wave radar printed antenna is also influenced, the performance of the millimeter wave radar printed antenna is influenced, the pre-simulated index and the expected performance set value cannot be reached, and the consistency of antenna batches cannot be ensured; the method comprises the steps of dividing the printed antenna into areas in advance, and presetting corresponding copper thickness manufacturing error threshold ranges for the areas respectively, so that each area corresponds to the corresponding preset copper thickness error threshold range respectively; and comparing the copper thickness manufacturing error of each region with a preset copper thickness error threshold range, and judging the qualification of the copper thickness of the region, wherein when the copper thickness manufacturing error of the region is within the preset copper thickness error threshold range of the region, the copper thickness of the region is qualified, and when the copper thickness manufacturing error of the region exceeds the preset copper thickness error threshold range, the copper thickness of the region is unqualified. In the actual processing process, the copper thickness manufacturing errors of the preset area of the printed antennas in the same batch are all within the preset copper thickness error threshold range of the area, so that the processing influence of copper thickness is avoided, the consistency of antenna batches is ensured, and meanwhile, the situation that the antenna performance of the millimeter wave radar is influenced due to overlarge copper thickness manufacturing errors of the area is avoided.
Preferably, after testing the antenna of the millimeter wave radar obtained by actual processing at the highest frequency of 77GHz-81GHz, it is known that when the copper thickness error of the preset area is controlled to be +/-8 UM, the antenna of the millimeter wave radar after actual processing is most coincident with the original design, and the influence of the copper thickness of the area on the antenna performance of the millimeter wave radar after actual processing can be avoided, so that +/-8 UM is used as an optimal solution of the copper thickness manufacturing error of the area, namely, the preset copper thickness error threshold range corresponding to the area is set to be +/-8 UM.
Optionally, in the low frequency band, a suitable widening of the preset copper thickness error threshold range may also achieve technical effects consistent with the above examples.
In the application, the contour precision corresponding to the outer corners, the inner corners and the outer contours of the figures and 4 copper thickness characteristics of the preset area are simultaneously and correspondingly restrained, so that the maximum fit of the original design is ensured, and the performance of the printing day is ensured to reach the standard.
The method is easy to realize in the production process without adding extra production procedures, solves the problems of gain reduction, center frequency deviation, inconsistent channels and the like caused by the actual processing of the millimeter wave radar antenna pattern on a printed board, solves the problems that the current industry general standard cannot meet the requirement of the printed millimeter wave radar antenna precision, and indicates the key point of control and specific acceptable error value when the actual processing of the millimeter wave radar antenna pattern.
Fig. 6 shows a specific embodiment of a method for measuring a millimeter wave radar printed antenna according to the present application.
In the specific embodiment shown in fig. 6, the method for measuring the millimeter wave radar printed antenna mainly includes:
step 601, determining an angle of an outer intersection point position in a millimeter wave radar printed antenna graph as an outer angle, wherein the outer angle comprises a first side, a second side and a third side, an extension line of the first side is perpendicular to an extension line of the third side, and the second side is connected with the first side and the second side respectively;
step 602, respectively extending the intersection of the first edge and the third edge at an external angle intersection point;
and step 603, measuring the vertical distance from the intersection point of the external angle to the second edge, and obtaining an external angle manufacturing error corresponding to the external angle, wherein the external angle manufacturing error is used for judging the qualification of the external angle.
In the specific embodiment, as the external angle is not restrained in the prior art, and the final effect is not right angle due to the etching of the liquid medicine in the actual processing, the antenna performance of the millimeter wave radar is affected, the pre-simulated index and the expected performance set value cannot be reached, and the consistency of the antenna batch cannot be ensured; the method comprises the steps of firstly determining the external angle of a millimeter wave radar printed antenna pattern, wherein the external angle consists of a first side, a second side and a third side, the first side and the third side are straight lines, and the extension line of the first side is perpendicular to the extension line of the third side; the second edge is connected to the first edge and the third edge, respectively, wherein the second edge includes, but is not limited to, a straight line and an arc. And respectively extending the first side and the third side to ensure that two straight lines intersect at an external angle intersection point, measuring the vertical distance between the external angle intersection point and the second side, and taking the vertical distance as an external intersection manufacturing error corresponding to the external angle to judge the qualification of the external angle. The method and the device have the advantages that the processing influence of the external angle is avoided, the efficiency of detecting the qualification of the printed antenna is improved, and the performance of the qualified printed antenna is up to standard.
In an alternative embodiment of the present application, the method for measuring millimeter wave radar printed antenna is characterized by further comprising: determining an angle of an inner side intersection point position in a millimeter wave radar printed antenna graph as an inner angle, wherein the inner angle comprises a fourth side, a fifth side and a sixth side, an extension line of the fourth side is perpendicular to an extension line of the sixth side, and the fifth side is respectively connected with the fourth side and the sixth side; respectively extending the intersection of the fourth side and the sixth side at an inner angle intersection; and measuring the vertical distance from the intersection point of the inner angle to the fifth edge to obtain an inner angle manufacturing error corresponding to the inner angle, wherein the inner angle manufacturing error is used for judging the qualification of the inner angle.
In the specific embodiment, since the internal angle is not constrained in the prior art, and the final effect is not right angle due to the etching of the liquid medicine in the actual processing, the antenna performance of the millimeter wave radar is affected, the pre-simulated index and the expected performance set value cannot be reached, and the consistency of the antenna batch cannot be ensured; the method comprises the steps of firstly determining the inner angle of a millimeter wave radar printed antenna pattern, wherein the inner angle consists of a fourth side, a fifth side and a sixth side, the fourth side and the sixth side are straight lines, and the extension line of the fourth side is perpendicular to the extension line of the sixth side; the fifth side is connected to the fourth side and the sixth side, respectively, wherein the fourth side includes but is not limited to a straight line and an arc. And respectively extending the fourth side and the sixth side to ensure that the two straight lines intersect at an inner angle intersection point, measuring the vertical distance from the inner angle intersection point to the fifth side, taking the vertical distance as an inner intersection manufacturing error corresponding to the inner angle, and judging the qualification of the inner angle so as to avoid the processing influence of the inner angle, improve the efficiency of detecting the qualification of the printed antenna and ensure that the performance of the judged qualified printed antenna meets the standard.
The measuring method of the millimeter wave radar printed antenna provided by the application can be used for executing the manufacturing constraint method of the millimeter wave radar printed antenna described in any embodiment, and the implementation principle and the technical effect are similar and are not repeated here.
In another embodiment of the present application, a measuring device for a millimeter wave radar printed antenna includes: the external angle measurement module is used for measuring the external angle of the millimeter wave radar printed antenna pattern, wherein the external angle measurement module comprises a module for determining the angle of the outer intersection point position in the millimeter wave radar printed antenna pattern as the external angle, and the internal angle comprises a first side, a second side and a third side, wherein the extension line of the first side is perpendicular to the extension line of the third side, and the second side is respectively connected with the first side and the third side; means for extending the intersection of the first edge and the third edge at an external corner intersection point, respectively; and a module for measuring the vertical distance from the intersection point of the external angle to the second side to obtain an external angle manufacturing error corresponding to the external angle, wherein the external angle manufacturing error is used for judging the qualification of the external angle.
In an alternative embodiment of the present application, the measuring device of the millimeter wave radar printed antenna is characterized by further comprising: the inner angle measuring module is used for measuring the inner angle of the millimeter wave radar printed antenna pattern, wherein the inner angle measuring module comprises a module for determining the inner angle of the inner side junction point in the millimeter wave radar printed antenna pattern as the inner angle, and the inner angle comprises a fourth side, a fifth side and a sixth side, wherein the extension line of the fourth side is perpendicular to the extension line of the sixth side, and the fifth side is respectively connected with the fourth side and the sixth side; means for extending the intersection of the fourth and sixth sides at an interior corner intersection, respectively; and a module for measuring the vertical distance from the intersection of the inner corners to the fifth edge to obtain an inner corner manufacturing error corresponding to the inner corner, wherein the inner corner manufacturing error is used for judging the qualification of the inner corner.
In a specific embodiment of the present application, the functional modules of a millimeter wave radar printed antenna measurement device of the present application may be directly in hardware, in a software module executed by a processor, or in a combination of both.
A software module may reside in RAM memory, flash memory, ROM memory, EPROM memory, EEPROM memory, registers, hard disk, a removable disk, a CD-ROM, or any other form of storage medium known in the art. An exemplary storage medium is coupled to the processor such the processor can read information from, and write information to, the storage medium.
The processor may be a central processing unit (English: central Processing Unit; CPU; for short), or other general purpose processor, digital signal processor (English: digital Signal Processor; for short DSP), application specific integrated circuit (English: application Specific Integrated Circuit; ASIC; for short), field programmable gate array (English: field Programmable Gate Array; FPGA) or other programmable logic device, discrete gate or transistor logic, discrete hardware components, or any combination thereof, etc. A general purpose processor may be a microprocessor, but in the alternative, the processor may be any conventional processor, controller, microcontroller, or state machine. A processor may also be implemented as a combination of computing devices, e.g., a combination of a DSP and a microprocessor, a plurality of microprocessors, one or more microprocessors in conjunction with a DSP core, or any other such configuration. In the alternative, the storage medium may be integral to the processor. The processor and the storage medium may reside in an ASIC. The ASIC may reside in a user terminal. In the alternative, the processor and the storage medium may reside as discrete components in a user terminal.
The measuring device of the millimeter wave radar printed antenna provided by the application can be used for executing the manufacturing constraint method of the millimeter wave radar printed antenna or the measuring method of the millimeter wave radar printed antenna described in any embodiment, and the implementation principle and the technical effect are similar and are not repeated here.
In another embodiment of the present application, a computer-readable storage medium stores computer instructions that are operable to perform the fabrication constraint method of the millimeter wave radar print antenna or the measurement method of the millimeter wave radar print antenna described in the above-described embodiment.
In one embodiment of the present application, a computer device comprises: at least one processor; and a memory communicatively coupled to the at least one processor; the memory stores therein computer instructions executable by at least one processor that operates the computer instructions to perform the method of manufacturing constraints for millimeter wave radar printed antennas or the method of measuring millimeter wave radar printed antennas described in the above embodiments.
In the several embodiments provided by the present application, it should be understood that the disclosed apparatus and method may be implemented in other manners. For example, the apparatus embodiments described above are merely illustrative, e.g., the division of the units is merely a logical function division, and there may be additional divisions when actually implemented, e.g., multiple units or components may be combined or integrated into another system, or some features may be omitted or not performed. Alternatively, the coupling or direct coupling or communication connection shown or discussed with each other may be an indirect coupling or communication connection via some interfaces, devices or units, which may be in electrical, mechanical or other form.
The units described as separate units may or may not be physically separate, and units shown as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.
The foregoing description is only illustrative of the present application and is not intended to limit the scope of the application, and all equivalent structural changes made by the present application and the accompanying drawings, or direct or indirect application in other related technical fields, are included in the scope of the present application.
Claims (10)
1. The manufacturing constraint method of the millimeter wave radar printed antenna is characterized by comprising the following steps of:
determining an angle protruding outwards in a millimeter wave radar printed antenna graph as an external angle, wherein the external angle comprises a first side, a second side and a third side, an extension line of the first side is perpendicular to an extension line of the third side, and the second side is respectively connected with the first side and the second side;
and respectively extending the intersection of the first side and the third side at an external angle intersection point, calculating the vertical distance from the external angle intersection point to the second side, and taking the vertical distance as an external angle manufacturing error, wherein if the external angle manufacturing error is smaller than or equal to a preset external angle error threshold value, the external angle is qualified.
2. The method of manufacturing constraints for millimeter wave radar printed antennas of claim 1, further comprising:
determining an inward concave angle in the millimeter wave radar printed antenna graph as an inner angle, wherein the inner angle comprises a fourth side, a fifth side and a sixth side, an extension line of the fourth side is perpendicular to an extension line of the sixth side, and the fifth side is respectively connected with the fourth side and the sixth side;
and respectively extending the intersection of the fourth side and the sixth side at an inner angle intersection point, calculating the vertical distance from the inner angle intersection point to the fifth side, and taking the vertical distance as an inner angle manufacturing error, wherein if the inner angle manufacturing error is smaller than or equal to a preset inner angle error threshold value, the inner angle is qualified.
3. The method of manufacturing constraints for millimeter wave radar printed antennas according to claim 1 or 2, further comprising:
calculating the outline precision of the figure outline of the millimeter wave radar printed antenna figure;
and if the contour precision is within a preset contour precision error threshold range, the outer contour of the graph is qualified, and the preset wheel-widening precision error threshold range is [ -15, 15] micrometers.
4. The method of manufacturing constraints for millimeter wave radar printed antennas of claim 3, further comprising:
calculating a copper thickness manufacturing error in a preset area in the millimeter wave radar printed antenna graph;
and if the copper thickness manufacturing error is within a preset area copper thickness error threshold value range, the copper thickness is qualified, and the preset area copper thickness manufacturing error range is [ -8,8] microns.
5. The method of claim 1, wherein the predetermined external angle error threshold is 15 microns.
6. The method of claim 2, wherein the predetermined internal angle error threshold is 20 microns.
7. A method for measuring a millimeter wave radar printed antenna, comprising:
determining an angle protruding outwards in a millimeter wave radar printed antenna graph as an external angle, wherein the external angle comprises a first side, a second side and a third side, an extension line of the first side is perpendicular to an extension line of the third side, and the second side is respectively connected with the first side and the second side;
respectively extending the intersection of the first edge and the third edge at an external angle intersection point; and
and measuring the vertical distance from the intersection point of the external angle to the second side to obtain an external angle manufacturing error corresponding to the external angle, wherein the external angle manufacturing error is used for judging the qualification of the external angle.
8. The method for measuring a millimeter wave radar printed antenna according to claim 7, further comprising:
determining an inward concave angle in the millimeter wave radar printed antenna graph as an inner angle, wherein the inner angle comprises a fourth side, a fifth side and a sixth side, an extension line of the fourth side is perpendicular to an extension line of the sixth side, and the fifth side is respectively connected with the fourth side and the sixth side;
respectively extending the intersection of the fourth side and the sixth side at an inner angle intersection point; and
and measuring the vertical distance from the intersection point of the inner angle to the fifth edge to obtain an inner angle manufacturing error corresponding to the inner angle, wherein the inner angle manufacturing error is used for judging the qualification of the inner angle.
9. A millimeter wave radar printed antenna measurement device, comprising:
an external angle measurement module for measuring an external angle of a millimeter wave radar printed antenna pattern, wherein the external angle measurement module comprises,
the module is used for determining an angle protruding outwards in the millimeter wave radar printed antenna graph as an external angle, wherein the external angle comprises a first side, a second side and a third side, an extension line of the first side is perpendicular to an extension line of the third side, and the second side is respectively connected with the first side and the third side;
means for extending the intersection of the first edge and the third edge at an external angle intersection point, respectively; and
and the module is used for measuring the vertical distance from the intersection point of the external angle to the second side to obtain an external angle manufacturing error corresponding to the external angle, wherein the external angle manufacturing error is used for judging the qualification of the external angle.
10. The millimeter wave radar printed antenna measurement device of claim 9, further comprising:
an interior angle measurement module for measuring an interior angle of the millimeter wave radar printed antenna pattern, wherein the interior angle measurement module comprises,
the module is used for determining an inward concave angle in the millimeter wave radar printed antenna graph as an inner angle, wherein the inner angle comprises a fourth side, a fifth side and a sixth side, an extension line of the fourth side is perpendicular to an extension line of the sixth side, and the fifth side is respectively connected with the fourth side and the sixth side;
means for extending the intersection of the fourth side and the sixth side at an interior angle intersection, respectively; and
and a module for measuring the vertical distance from the intersection point of the inner angle to the fifth edge to obtain an inner angle manufacturing error corresponding to the inner angle, wherein the inner angle manufacturing error is used for judging the qualification of the inner angle.
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| CN114256611A (en) | 2022-03-29 |
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