A millimeter-wave radar antenna pattern measurement environment device and measurement system

Abstract

The present invention discloses a measurement environment device and a measurement system for the directional pattern of a millimeter-wave radar antenna, and relates to the field of millimeter-wave radar. The measurement environment device includes: an antenna to be measured, a plurality of environment antenna modules, and a plurality of microstrip antennas, wherein one environment antenna module is connected to a corresponding microstrip antenna, and the microstrip antenna serves as a matching load for the environment antenna module; the plurality of environment antenna modules and the plurality of microstrip antennas form a measurement channel, and the microstrip antenna serves as a matching load to absorb the power emitted outward by the antenna to be measured, and converts the absorbed power into cross-polarized radiated power. Thus, the power emitted by the antenna to be measured is absorbed by the microstrip antenna, and the absorbed power is converted into cross-polarized radiated power, which can simulate the measurement environment of the radar antenna, so that the main polarization directional pattern of the radar antenna can be accurately measured; and the microstrip antenna can be integrated with the environment antenna as a matching load, resulting in a compact structure and greatly reducing the complexity of the measurement environment device.

Description

Technical Field

[0001] The present invention relates to the technical field of millimeter wave radar, and in particular to a measurement environment device and a measurement system for a millimeter wave radar antenna pattern. Background Art

[0002] At present, automobile safety configuration is related to the safe driving performance of the car and has become an important reference indicator for customers to purchase cars.

[0003] With the development of automobile technology, automobiles are equipped with on-board millimeter-wave radar as a safety driving component. Whether the on-board millimeter-wave radar can work accurately directly affects the safe driving of the car.

[0004] To increase radar power and angular resolution, MIMO (Multiple Input Multiple Output) radar has become the predominant form of automotive millimeter-wave radar. The MIMO antenna is a key component of MIMO radar, and its radiation pattern directly affects radar detection performance. Therefore, accurately measuring the radiation pattern of MIMO millimeter-wave radar antennas is of great practical significance.

[0005] Conventional technology requires matching loads when measuring one channel of a MIMO antenna. For microstrip antennas commonly used in millimeter-wave MIMO radars, conventional matching loads typically use bulky, expensive, and large waveguide loads. However, due to the relatively small size of millimeter-wave microstrip antennas, using a large waveguide load as a matching load for the microstrip antenna complicates the design of the measurement environment and increases its overall size. Furthermore, using a waveguide as a matching load dissipates absorbed power as heat, making it impossible to accurately measure the main polarization pattern of the MIMO millimeter-wave radar antenna. Summary of the Invention

[0006] The embodiments of the present invention aim to provide a measurement environment device and measurement system for the radiation pattern of a millimeter-wave radar antenna, aiming to solve the problem that the current use of a large waveguide load as a matching load for a microstrip antenna results in a complex design of the measurement environment device, a large overall size, and an inability to accurately measure the main polarization radiation pattern of a MIMO millimeter-wave radar antenna.

[0007] To solve the above technical problems, the embodiments of the first aspect of the present invention provide the following technical solutions: a device for measuring the radiation pattern of a millimeter-wave radar antenna, the device comprising: an antenna to be measured, a plurality of environmental antenna modules, and a plurality of microstrip antennas, wherein:

[0008] One of the environmental antenna modules is connected to a corresponding microstrip antenna, and the microstrip antenna serves as a matching load for the environmental antenna module;

[0009] The plurality of environmental antenna modules and the plurality of microstrip antennas form a measurement channel. The microstrip antennas serve as matching loads to absorb the power emitted outward by the antenna to be measured and convert the absorbed power into cross-polarized radiated power.

[0010] Optionally, the environmental antenna module includes a first antenna body and a first antenna port, and the first antenna port is arranged on the first antenna body; the first antenna body includes a plurality of first antenna units.

[0011] Optionally, the microstrip antenna is connected to the first antenna port, and a polarization mode of the microstrip antenna is orthogonal to a polarization mode of the first antenna body.

[0012] Optionally, the antenna to be tested includes a second antenna body and a second antenna port, the second antenna port is provided on the first antenna body, and the second antenna body includes a plurality of second antenna units.

[0013] Optionally, the first antenna body is a comb-shaped linear array, and the first antenna unit is comb-shaped.

[0014] Optionally, the second antenna body is a comb-shaped linear array, and the second antenna unit is comb-shaped.

[0015] Optionally, the first antenna body is a serpentine linear array, and the first antenna unit is a serpentine line.

[0016] Optionally, the second antenna body is a serpentine line array, and the second antenna unit is a serpentine line.

[0017] Optionally, the first antenna body is a through-core serially fed array, the first antenna unit is a through-core serially fed array; and the second antenna unit is a through-core serially fed array.

[0018] The embodiment of the second aspect of the present invention provides the following technical solution: a millimeter wave MIMO millimeter wave radar antenna pattern measurement system, the measurement system comprising: the measurement environment device described in the embodiment of the first aspect above, an electronically controlled turntable, a vector network analyzer, a microcomputer installed with measurement system software, and a transmitting horn antenna; wherein:

[0019] The measurement environment device is used to form a measurement channel, absorb the power emitted outward by the antenna to be measured, and convert the absorbed power into cross-polarized radiation power;

[0020] The electrically controlled turntable is used to fix the antenna to be measured in the measurement environment device and control its angle;

[0021] The transmitting horn antenna includes a transmitting antenna port for transmitting test data;

[0022] The vector network analyzer includes a first port and a second port, the first port is connected to the transmitting antenna port, and the second port is connected to the second antenna port of the antenna to be tested, and is used to form a measurement channel in the measurement environment device according to the test data transmitted by the transmitting horn antenna to collect the directional pattern data of the antenna to be tested;

[0023] The microcomputer is electrically connected to the vector network analyzer and the electronically controlled turntable via a communication cable, and is used to synchronously control the electronically controlled turntable and the vector network analyzer to complete the collection of the directional pattern data of the antenna to be tested and complete data processing, and output the main polarization directional pattern of the antenna to be tested.

[0024] Compared with the prior art, an embodiment of the present invention provides a millimeter-wave radar antenna pattern measurement environment device and measurement system. The measurement environment device includes an antenna to be measured, multiple environment antenna modules, and multiple microstrip antennas. One of the environment antenna modules is connected to a corresponding microstrip antenna. The microstrip antenna serves as a matching load for the environment antenna module. The multiple environment antenna modules and multiple microstrip antennas form a measurement channel. The microstrip antenna serves as a matching load to absorb the power emitted outward by the antenna to be measured and convert the absorbed power into cross-polarized radiated power. Therefore, the microstrip antenna can be used as a matching load to absorb the power emitted by the antenna to be measured, and the absorbed power can be converted into cross-polarized radiated power, so that the measurement environment of the MIMO millimeter-wave radar antenna can be simulated, so that the main polarization radiation pattern of the MIMO millimeter-wave radar antenna can be accurately measured; and the integration of the microstrip antenna as a matching load and the environmental antenna can be realized, with a compact structure, which greatly reduces the complexity of the measurement environment device, thereby solving the problem that the current use of a large waveguide load as a matching load for the microstrip antenna leads to a complex design of the measurement environment device, a large overall size, and an inability to accurately measure the main polarization radiation pattern of the MIMO millimeter-wave radar antenna. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] One or more embodiments are exemplarily illustrated by pictures in the corresponding drawings. These exemplifications do not constitute limitations on the embodiments. Elements with the same reference numerals in the drawings are represented as similar elements. Unless otherwise stated, the figures in the drawings do not constitute proportional limitations.

[0026] Figure 1 This is a schematic structural diagram of a device for measuring the directional pattern of a millimeter-wave MIMO millimeter-wave radar antenna provided by the present invention;

[0027] Figure 2This is a schematic diagram of the first structure of the antenna body in a device for measuring the millimeter wave MIMO millimeter wave radar antenna pattern provided by the present invention;

[0028] Figure 3 This is a simulation result diagram of the reflection coefficient when the microstrip antenna is used as a matching load in a measurement environment device for the millimeter wave MIMO millimeter wave radar antenna pattern provided by the present invention;

[0029] Figure 4 This is a second structural schematic diagram of the antenna body in a device for measuring the millimeter wave MIMO millimeter wave radar antenna pattern provided by the present invention;

[0030] Figure 5 This is a third structural schematic diagram of the antenna body in the measurement environment device for the millimeter wave MIMO millimeter wave radar antenna pattern provided by the present invention;

[0031] Figure 6 This is a schematic structural diagram of a millimeter-wave MIMO millimeter-wave radar antenna pattern measurement system provided by the present invention;

[0032] Figure 7 This is a comparison diagram of the degree of overlap between the E-plane main polarization pattern and the true pattern measured by a millimeter-wave MIMO millimeter-wave radar antenna pattern measurement system provided by the present invention;

[0033] Figure 8 This is a comparison diagram of the overlap between the H-plane main polarization pattern and the true pattern measured by a millimeter-wave MIMO millimeter-wave radar antenna pattern measurement system provided by the present invention. DETAILED DESCRIPTION

[0034] For ease of understanding of the present invention, the present invention will be described in more detail below in conjunction with the accompanying drawings and specific embodiments. It should be noted that when an element is described as being "fixed to" another element, it can be directly on the other element, or there can be one or more centered elements therebetween. When an element is described as being "connected to" another element, it can be directly connected to the other element, or there can be one or more centered elements therebetween. The orientation or positional relationship indicated by the terms "upper", "lower", "inner", "outer", "bottom" etc. used in this specification is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", "third", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0035] Unless otherwise defined, all technical and scientific terms used in this specification have the same meanings as those commonly understood by those skilled in the art to which this invention belongs. The terms used in this specification and in the description of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" as used in this specification includes any and all combinations of one or more of the relevant listed items.

[0036] In addition, the technical features involved in different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0037] In one embodiment, Figure 1 As shown, the present invention provides a measurement environment device for millimeter wave radar antenna patterns, wherein the measurement environment device 1 comprises: an antenna to be measured 13, a plurality of environment antenna modules 11 and a plurality of microstrip antennas 12, wherein:

[0038] One of the environmental antenna modules 11 is connected to a corresponding microstrip antenna 12, and the microstrip antenna 12 serves as a matching load for the environmental antenna module 11;

[0039] The plurality of environmental antenna modules 11 and the plurality of microstrip antennas 12 form a measurement channel. The microstrip antennas 12 serve as matching loads to absorb the power emitted outward by the antenna to be measured 13 and convert the absorbed power into cross-polarized radiated power.

[0040] In this embodiment, a measurement environment device includes an antenna to be tested, several environment antenna modules, and several microstrip antennas. One of the environment antenna modules is connected to a corresponding microstrip antenna, and the microstrip antenna serves as a matching load for the environment antenna module. The environment antenna modules and the microstrip antennas form a measurement channel. The microstrip antenna serves as a matching load to absorb the power emitted by the antenna to be tested and convert the absorbed power into cross-polarized radiated power. Thus, the microstrip antenna, acting as a matching load, can absorb the power emitted by the antenna to be tested and convert the absorbed power into cross-polarized radiated power. This allows for simulating the measurement environment of a MIMO millimeter-wave radar antenna, enabling accurate measurement of the main polarization pattern of the MIMO millimeter-wave radar antenna. Furthermore, the microstrip antenna, acting as a matching load, can be integrated with the environment antenna, resulting in a compact structure and significantly reducing the complexity of the measurement environment device. This addresses the current problem of using a large waveguide load as a matching load for a microstrip antenna, which results in a complex design of the measurement environment device, a large overall size, and an inability to accurately measure the main polarization pattern of the MIMO millimeter-wave radar antenna.

[0041] In the present invention, a MIMO millimeter-wave radar antenna includes several antenna modules. When measuring the main polarization pattern of one antenna module, this antenna module is referred to as the antenna under test, and the remaining antenna modules are referred to as ambient antenna modules. The ambient antenna modules form a measurement channel to measure the main polarization pattern of the antenna under test.

[0042] In one embodiment, Figure 1 and Figure 2 As shown, the environmental antenna module 11 includes a first antenna body 111 and a first antenna port 112, and the first antenna port 112 is set on the first antenna body 111; the first antenna body 111 includes a plurality of first antenna units 1111, and the plurality of first antenna units 1111 form a linear array, so that the first antenna body 111 is a linear array.

[0043] The microstrip antenna 12 is connected to the first antenna port 112 , and a polarization mode of the microstrip antenna 12 is orthogonal to a polarization mode of the first antenna body 111 .

[0044] Correspondingly, if Figure 1 and Figure 2 As shown, the antenna under test 13 also includes a second antenna body 131 and a second antenna port 132. The second antenna port 132 is provided on the first antenna body 131. The polarization direction of the first antenna body 131 is either linear polarization or circular polarization. The second antenna body 131 includes a plurality of second antenna units 1311. The plurality of second antenna units 1311 form a linear array, making the second antenna body 131 a linear array.

[0045] The structural shape of the second antenna body 131 is the same as that of the first antenna body 111 , and the structural shape of the second antenna unit 1311 is the same as that of the second antenna unit 1111 .

[0046] First embodiment

[0047] In one embodiment, Figure 2 As shown, the first antenna body 111 is a comb-shaped linear array, the first antenna unit 1111 is comb-shaped, and several first comb-shaped antenna units 1111 form the first antenna body. The first antenna body 111 and the first antenna port 112 constitute the environmental antenna module 11; the several environmental antenna modules 11 and the several microstrip antennas 12 form a measurement channel.

[0048] Correspondingly, the second antenna body 131 of the antenna to be tested is also a comb-shaped linear array. The second antenna body 131 includes a plurality of comb-shaped second antenna units 1311 , and the plurality of comb-shaped second antenna units 1311 constitute the second antenna body.

[0049] Specifically, in Figure 2 In the embodiment, three environment antenna modules 11 and one antenna to be tested 12 are taken as an example for description.

[0050] Figure 2 In the embodiment, the millimeter-wave radar antenna pattern measurement environment device 1 includes three environment antenna modules 11, three microstrip antennas 12 and one antenna to be measured 13; the first antenna body 111 of each environment antenna module 11 is a comb-shaped linear array, and the first antenna body 111 includes eight comb-shaped first antenna units 1111.

[0051] The first antenna body 111 of the environmental antenna module 11 is externally connected to the microstrip antenna 12 via the first antenna port 112. The microstrip antenna 12 serves as a matching load for the environmental antenna module 11. Preferably, the matching resistance of the microstrip antenna 12 is 50 ohms.

[0052] The main polarization mode of the first antenna body 111 of the comb-shaped linear array of the environmental antenna module 11 is horizontal polarization, and the polarization mode of the microstrip antenna 12 is vertical polarization and orthogonal to the horizontal polarization, so that the first antenna body 111 and the microstrip antenna 12 form cross-polarization of the comb-shaped linear array.

[0053] Correspondingly, the antenna under test 13 includes a second antenna body 131 and a second antenna port 132. The second antenna body 131 is also a comb-shaped linear array. The second antenna body 31 includes a plurality of comb-shaped second antenna units 1311. The plurality of comb-shaped second antenna units 1311 constitute a comb-shaped linear array.

[0054] Specifically, in this embodiment, the dielectric substrate of the environmental antenna module 11 and the antenna to be tested 13 is Rogers Ro3003G2, the thickness of the dielectric substrate is 0.127 mm, and the copper cladding thickness is 0.5 oz; the comb linear array spacing is 1.95 mm, the comb-shaped first antenna unit 1111 and the second antenna unit 1311 are radiating patches, the radiating patch spacing is 1.33 mm, and the radiating patch length is 1.21 mm; the main feed line characteristic impedance is 50 ohms and the width is 0.3 mm; the structural dimensions of the microstrip antenna 12 are: length 1.125 mm, width 1.06 mm, feeding slot length 0.412 mm, and feeding slot width 0.63 mm.

[0055] According to the above parameters, the reflection coefficient of the microstrip antenna 12 is simulated, and the simulation results are as follows: Figure 3 shown. Figure 3 In the figure, the horizontal axis Freq represents the frequency, and the vertical axis gamma represents the reflection coefficient.

[0056] according to Figure 3 As shown in the simulation results, the simulation results of the reflection coefficient of the microstrip antenna 12 show that the input impedance of the microstrip antenna 12 is about 50 ohms at 76.5 GHz.

[0057] In this embodiment, since several environmental antenna modules and several microstrip antennas form a comb-shaped linear array measurement channel, the microstrip antenna serves as a matching load for the environmental antenna module. Correspondingly, the antenna body of the antenna to be tested is also a comb-shaped linear array. Therefore, using the microstrip antenna as a matching load can absorb the power emitted outward by the antenna to be tested and convert the absorbed power into cross-polarized radiated power, rather than converting the absorbed power into heat dissipation as in current conventional technology when a waveguide is used as a matching load. Therefore, the main polarization pattern of the antenna to be tested is not affected. The measurement environment of the MIMO millimeter-wave radar antenna can be simulated, so that the main polarization pattern of the MIMO millimeter-wave radar antenna can be accurately measured.

[0058] Second embodiment

[0059] In one embodiment, Figure 4 As shown, the technical solution of the second embodiment is basically the same as that of the first embodiment, except that in the second embodiment, the first antenna body 111 is a serpentine linear array, the first antenna unit 1111 is a serpentine line, and a plurality of serpentine first antenna units 1111 form the first antenna body. The first antenna body 111 and the second antenna port 112 constitute an environmental antenna module 11; the plurality of environmental antenna modules 11 and the plurality of microstrip antennas 12 form a measurement channel.

[0060] Correspondingly, the second antenna body 131 of the antenna to be tested 13 is also a serpentine linear array. The second antenna body 131 includes a plurality of serpentine second antenna units 1311 , and the plurality of serpentine second antenna units 1311 constitute the second antenna body 131 .

[0061] Third embodiment

[0062] In one embodiment, Figure 5As shown, the technical solution of the third embodiment is basically the same as that of the first embodiment, except that, in the third embodiment, the first antenna body 111 is a through-core series-fed linear array, the first antenna unit 1111 is a through-core series-fed array, and a plurality of through-core series-fed first antenna units 1111 constitute the first antenna body. The first antenna body 111 and the first antenna port 112 constitute an environmental antenna module 11; the plurality of environmental antenna modules 11 and the plurality of microstrip antennas 12 form a measurement channel.

[0063] Correspondingly, the second antenna body 131 of the antenna to be tested 13 is also a through-core series-fed array. The second antenna body 131 includes a plurality of through-core series-fed second antenna units 1311, and the plurality of through-core series-fed second antenna units 1311 constitute the second antenna body.

[0064] Based on the same concept, in one embodiment, Figure 6 As shown, the present invention provides a millimeter wave MIMO millimeter wave radar antenna pattern measurement system, the measurement system comprising: a measurement environment device 1 according to any of the above embodiments, an electrically controlled turntable 2, a vector network analyzer 3, a microcomputer 4 installed with measurement system software, and a transmitting horn antenna 5; wherein:

[0065] The measurement environment device 1 is used to form a measurement channel, absorb the power emitted outward by the antenna to be measured 13, and convert the absorbed power into cross-polarized radiation power;

[0066] The electrically controlled turntable 2 is used to fix the antenna 13 to be measured in the measurement environment device 1 and control its angle;

[0067] The transmitting horn antenna 5 includes a transmitting antenna port 51 for transmitting test data;

[0068] The vector network analyzer 3 includes a first port 31 and a second port 32, wherein the first port 31 is connected to the transmitting antenna port 51 of the transmitting horn antenna 5, and the second port 32 is connected to the second antenna port 132 of the antenna to be tested 13 of the measurement environment device 1, and is used to form a measurement channel in the measurement environment device 1 according to the test data transmitted by the transmitting horn antenna 5 to collect the directional pattern data of the antenna to be tested 13;

[0069] The microcomputer 4 is electrically connected to the vector network analyzer 3 and the electronically controlled turntable 2 via a communication cable, and is used to synchronously control the electronically controlled turntable 2 and the vector network analyzer 3 to complete the acquisition of the directional pattern data of the antenna under test 13 and complete data processing, and output the main polarization directional pattern of the antenna under test 13.

[0070] The measurement environment device 1 includes: an antenna to be measured 13, several environment antenna modules 11 and several microstrip antennas 12, wherein:

[0071] One of the environmental antenna modules 11 is connected to a corresponding microstrip antenna 12, and the microstrip antenna 12 serves as a matching load for the environmental antenna module 11;

[0072] The plurality of environmental antenna modules 11 and the plurality of microstrip antennas 12 form a measurement channel. The microstrip antennas 12 serve as matching loads to absorb the power emitted outward by the antenna to be measured 13 and convert the absorbed power into cross-polarized radiated power.

[0073] Furthermore, the environmental antenna module 11 includes a first antenna body 111 and a first antenna port 112, and the first antenna port 112 is set on the first antenna body 111; the first antenna body 111 includes a plurality of first antenna units 1111, and the plurality of first antenna units 1111 form a linear array, so that the first antenna body 111 is a linear array.

[0074] The microstrip antenna 12 is connected to the first antenna port 112 , and a polarization mode of the microstrip antenna 12 is orthogonal to a polarization mode of the first antenna body 111 .

[0075] The antenna under test 13 also includes a second antenna body 131 and a second antenna port 132. The second antenna port 132 is provided on the first antenna body 131. The polarization direction of the first antenna body 131 is either linear polarization or circular polarization. The second antenna body 131 includes a plurality of second antenna units 1311. The plurality of second antenna units 1311 form a linear array, making the second antenna body 131 a linear array.

[0076] The structural shape of the second antenna body 131 is the same as that of the first antenna body 111 , and the structural shape of the second antenna unit 1311 is the same as that of the second antenna unit 1111 .

[0077] This embodiment provides a millimeter-wave MIMO millimeter-wave radar antenna pattern measurement system that measures the main polarization pattern of the antenna to be measured in a measurement channel. The method is as follows:

[0078] Install the antenna to be tested 13, adjust the position of the antenna to be tested 13 to align with the transmitting horn antenna 5, and make the polarization mode of the antenna to be tested and the transmitting horn antenna 5 the same;

[0079] Set the test frequency, test angle range, angle step and other parameters in the measurement system software and start the measurement system software;

[0080] The measurement system software of the microcomputer 4 controls the electric-controlled turntable 2 to rotate the angle of the antenna to be measured 13 in steps and synchronously records the S21 parameter in the vector network analyzer 3 and the current antenna angle data of the electric-controlled turntable 2 until the acquisition of the antenna angle data within the preset angle range is completed;

[0081] The measurement system software processes the antenna angle data and the S21 parameter and draws the main polarization pattern of the antenna to be measured 13 , so that the main polarization pattern of the antenna to be measured 13 can be measured in the measurement channel.

[0082] Specifically, in this embodiment, the dielectric substrate of the environmental antenna module 11 and the antenna to be tested 13 is Rogers Ro3003G2, the thickness of the dielectric substrate is 0.127 mm, and the copper cladding thickness is 0.5 oz; the comb linear array spacing is 1.95 mm, the comb-shaped first antenna unit 1111 and the second antenna unit 1311 are radiating patches, the radiating patch spacing is 1.33 mm, and the radiating patch length is 1.21 mm; the main feed line characteristic impedance is 50 ohms and the width is 0.3 mm; the structural dimensions of the microstrip antenna 12 are: length 1.125 mm, width 1.06 mm, feeding slot length 0.412 mm, and feeding slot width 0.63 mm.

[0083] According to the above parameters, the overlap between the main polarization pattern and the real pattern of the measurement system on the E plane is simulated, and the simulation results are as follows: Figure 7 shown. Figure 7 In the figure, the horizontal axis Theta represents the angle, and the vertical axis Gain represents the normalized gain in dB.

[0084] according to Figure 7 As shown in the simulation results, the E-plane main polarization pattern measured by the measurement system has a high degree of overlap with the true pattern.

[0085] According to the above parameters, the overlap between the main polarization pattern and the real pattern of the measurement system on the H plane is simulated. The simulation results are as follows: Figure 8 shown. Figure 8 In the figure, the horizontal axis Theta represents the angle, and the vertical axis Gain represents the normalized gain in dB.

[0086] according to Figure 8 As shown in the simulation results, the H-plane main polarization pattern measured by the measurement system has a high degree of overlap with the true pattern, the main beam overlaps, and the first sidelobe error is less than 0.5dB.

[0087] In this embodiment, a millimeter-wave MIMO radar antenna pattern measurement system is provided. The measurement system includes a measurement environment device, the measurement environment device including an antenna to be measured, multiple environment antenna modules, and multiple microstrip antennas. The microstrip antenna serves as a matching load for the environment antenna module. The multiple environment antenna modules and the multiple microstrip antennas form a measurement channel. The microstrip antenna serves as a matching load to absorb the power emitted by the antenna to be measured and convert the absorbed power into cross-polarized radiated power. Thus, the microstrip antenna, serving as a matching load, can absorb the power emitted by the antenna to be measured and convert the absorbed power into cross-polarized radiated power. This can simulate the measurement environment of a MIMO radar antenna, allowing accurate measurement of the main polarization pattern of the MIMO radar antenna. Furthermore, the microstrip antenna, serving as a matching load, can be integrated with the environment antenna, resulting in a compact structure and significantly reducing the complexity of the measurement environment device. This solves the problem that the current use of a large waveguide load as a matching load for a microstrip antenna results in a complex design of the measurement environment device, a large overall size, and an inability to accurately measure the main polarization pattern of the MIMO radar antenna.

[0088] It should be noted that the above-mentioned millimeter-wave MIMO millimeter-wave radar antenna pattern measurement system embodiment and the measurement environment device embodiment belong to the same concept. The specific implementation process is detailed in the measurement environment device embodiment, and the technical features in the measurement environment device embodiment are correspondingly applicable in the measurement system, which will not be repeated here.

[0089] It should be noted that, in this document, the terms "comprises," "includes," or any other variations thereof are intended to encompass non-exclusive inclusion, such that a process, method, article, or apparatus comprising a series of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus. In the absence of further limitations, an element defined by the phrase "comprising a ..." does not exclude the presence of other identical elements in the process, method, article, or apparatus comprising the element.

[0090] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Under the concept of the present invention, the technical features in the above embodiments or different embodiments can also be combined, the steps can be implemented in any order, and there are many other variations in different aspects of the present invention as described above. For the sake of simplicity, they are not provided in detail. Although the present invention has been described in detail with reference to the above embodiments, ordinary technicians in this field should understand that they can still modify the technical solutions described in the above embodiments, or make equivalent replacements for some of the technical features therein. These modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A millimeter wave radar antenna pattern measurement environment device, characterized in that: The measurement environment device includes: an antenna to be measured, a plurality of environment antenna modules and a plurality of microstrip antennas, wherein: One of the environmental antenna modules is connected to a corresponding microstrip antenna, and the microstrip antenna serves as a matching load for the environmental antenna module; The plurality of environmental antenna modules and the plurality of microstrip antennas form a measurement channel, wherein the microstrip antennas serve as matching loads to absorb the power emitted outward by the antenna to be measured and convert the absorbed power into cross-polarized radiated power; The environmental antenna module includes a first antenna body and a first antenna port, wherein the first antenna port is arranged on the first antenna body; the first antenna body includes a plurality of first antenna units; the microstrip antenna is connected to the first antenna port, and the polarization mode of the microstrip antenna is orthogonal to the polarization mode of the first antenna body.

2. The environment measurement device according to claim 1, characterized in that: The antenna to be tested includes a second antenna body and a second antenna port, the second antenna port is arranged on the first antenna body, and the second antenna body includes a plurality of second antenna units.

3. The environment measurement device according to claim 2, characterized in that: The first antenna body is a comb-shaped linear array, and the first antenna unit is comb-shaped.

4. The environment measurement device according to claim 3, characterized in that: The second antenna body is a comb-shaped linear array, and the second antenna unit is comb-shaped.

5. The environment measurement device according to claim 2, characterized in that: The first antenna body is a serpentine linear array, and the first antenna unit is a serpentine line.

6. The device for measuring environment according to claim 3, characterized in that: The second antenna body is a serpentine linear array, and the second antenna unit is a serpentine line.

7. The device for measuring environment according to claim 2, characterized in that: The first antenna body is a through-core serially fed array, and the first antenna unit is a through-core serially fed array; The second antenna body is a through-core serially fed linear array, and the second antenna unit is a through-core serially fed array.

8. A millimeter wave MIMO millimeter wave radar antenna pattern measurement system, characterized in that: The measurement system comprises: a measurement environment device according to any one of claims 1 to 7, an electrically controlled turntable, a vector network analyzer, a microcomputer installed with measurement system software, and a transmitting horn antenna; wherein: The measurement environment device is used to form a measurement channel, absorb the power emitted outward by the antenna to be measured, and convert the absorbed power into cross-polarized radiation power; The electrically controlled turntable is used to fix the antenna to be measured in the measurement environment device and control its angle; The transmitting horn antenna includes a transmitting antenna port for transmitting test data; The vector network analyzer includes a first port and a second port, the first port is connected to the transmitting antenna port, and the second port is connected to the second antenna port of the antenna to be tested, and is used to form a measurement channel in the measurement environment device according to the test data transmitted by the transmitting horn antenna to collect the directional pattern data of the antenna to be tested; The microcomputer is electrically connected to the vector network analyzer and the electronically controlled turntable via a communication cable, and is used to synchronously control the electronically controlled turntable and the vector network analyzer to complete the collection of the directional pattern data of the antenna to be tested and complete data processing, and output the main polarization directional pattern of the antenna to be tested.

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