Multi-surface waveguide antenna millimeter wave radar device

Abstract

The utility model discloses a multi-surface waveguide antenna millimeter wave radar device, which comprises a circuit board, a conducting layer on one side or a part of the conducting layer comprises at least one radar chip assembly in a welding mode, and the radar chip assembly is provided with at least more than one radar signal transmitter and at least more than one radar signal receiver. Or at least more than one radar signal transmitter and receiver are arranged on the circuit board; the multi-surface waveguide antenna assembly is provided with more than one waveguide antenna array surface on the upper side of the multi-surface waveguide antenna assembly, and each waveguide antenna array surface is provided with one or more antenna arrays used for transmitting and / or receiving radar signals; at least one transmitter and / or receiver of the radar chip assembly, or at least more than one radar signal transmitter and receiver on the circuit board, and at least one antenna array of the waveguide multi-surface antenna array are connected through waveguide transmission; the radar device further comprises a radar front cover, a radar rear shell and a radar interface connector.

Description

Technical Field

[0001] The utility model belongs to the technical field of millimeter wave radars, and in particular relates to a multi-surface waveguide antenna millimeter wave radar device. Background Art

[0002] In some specific application scenarios, millimeter wave radar requires the FOV detection range angle of millimeter wave radar to be equal to or greater than 180 degrees, or even 360 degrees without blind spots. Considering that the angular detection range of millimeter wave radar is determined by the horizontal lobe angle of the antenna, the lobe angle of the planar antenna on the high-level circuit board is less than 180 degrees, or the lobe angle of the planar waveguide is also less than 180 degrees.

[0003] In existing technologies, some solutions use two radar antenna circuit boards assembled in one radar module to achieve a FOV detection range greater than 180 degrees; or two identical millimeter-wave radars are staggered to cover the entire area greater than 180 degrees. However, there are some disadvantages:

[0004] High cost: The above solution requires the use of two radar antenna circuit boards or two identical millimeter-wave radars, which increases the hardware cost. At the same time, assembling these components will also increase the production and assembly costs.

[0005] Large space occupation: Additional radar modules or multiple radar devices are required, which will take up more space and may not be suitable for some application scenarios with limited space.

[0006] System complexity: The need to operate multiple radar devices simultaneously brings certain complexity to system integration and control, and may require additional hardware and software support to achieve integration and synchronous operation.

[0007] Reduced reliability: Using multiple radar units increases the failure rate of the system because the failure of one component may affect the performance of the entire system, thereby reducing the reliability of the system.

[0008] Low market acceptance: Due to high cost, large space occupation, high system complexity and other issues, these solutions may not be very popular in the market, especially for application scenarios that require low cost and miniaturization.

[0009] In summary, although the existing solutions can achieve the requirement of a FOV detection range angle greater than 180 degrees, they have some disadvantages in terms of cost, space occupancy, system complexity and reliability. They are not suitable for some specific application scenarios and require simpler, more stable and low-cost solutions. Therefore, a multi-surface waveguide antenna millimeter-wave radar device is urgently needed to solve the above problems. Utility Model Content

[0010] In view of the problems raised by the above background technology, the purpose of the present utility model is to provide a multi-surface waveguide antenna millimeter wave radar device.

[0011] In order to achieve the above technical purpose, the technical solution adopted by the utility model is as follows:

[0012] A multi-surface waveguide antenna millimeter wave radar device, comprising a circuit board, a multi-surface waveguide antenna assembly, a radar front cover and a radar rear shell, and a radar interface connector;

[0013] A circuit board, wherein a conductive layer on one side and a part of the conductive layer thereof are soldered with at least one radar chip component, wherein the radar chip component has at least one radar signal transmitter and receiver, and the circuit board may also have at least one radar signal transmitter and receiver;

[0014] The multi-surface waveguide antenna assembly has more than one waveguide antenna array surface on its upper side, and each antenna array surface has more than one antenna array for transmitting and receiving radar signals.

[0015] It is further defined that the connection between at least one transmitter and receiver of the radar chip assembly, and at least one radar signal transmitter and receiver on the circuit board, and at least one antenna array of the multi-faceted waveguide antenna assembly is achieved through waveguide transmission.

[0016] It is further defined that the multi-surface waveguide antenna assembly includes two antenna array surfaces, three antenna array surfaces, four antenna array surfaces, and more than four antenna array surfaces.

[0017] It is further defined that a waveguide antenna composed of two antenna array surfaces can achieve a FOV detection angle range of more than 180 degrees, and a waveguide antenna composed of three or more antenna array surfaces can achieve a FOV detection angle range of 360 degrees.

[0018] It is further defined that the multi-faceted waveguide antenna assembly includes slot waveguide antennas, cavity waveguide antennas, horn waveguide antennas, gap waveguide antennas, air-integrated waveguide antennas, and other waveguide antennas.

[0019] The utility model has the following advantages:

[0020] Large-range detection: The design of the multi-faceted waveguide antenna assembly enables the radar to achieve a FOV detection range greater than 180 degrees or even 360 degrees, covering a wider angle range and without blind spots.

[0021] High-efficiency performance: It can effectively optimize the layout of multi-surface waveguide antenna components, improve the sensitivity and angle detection performance of the radar, and thus improve the performance of the system.

[0022] Simplified device: A wide range of angle detection requirements can be achieved in one device, avoiding additional components and complex assembly processes, reducing costs and system complexity.

[0023] Synchronous data processing: The use of a single PCB board design can better achieve synchronization, fusion and integration of radar data. This reduces the complexity of algorithms and software, improves system stability, and simplifies system integration and control processes. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The present invention can be further described by the non-limiting embodiments given in the accompanying drawings;

[0025] Figure 1 It is a cross-sectional schematic diagram of an implementation scheme of a multi-surface waveguide antenna millimeter wave radar device according to an embodiment of the utility model;

[0026] Figure 2 This is an exploded schematic diagram of an implementation scheme 1 of a multi-surface waveguide antenna millimeter wave radar device according to an embodiment of the utility model;

[0027] Figure 3 It is a cross-sectional schematic diagram of a second implementation scheme of a multi-surface waveguide antenna millimeter wave radar device according to an embodiment of the utility model;

[0028] Figure 4 This is an exploded schematic diagram of a second implementation scheme of a multi-surface waveguide antenna millimeter wave radar device according to an embodiment of the utility model;

[0029] Figure 5 It is a schematic cross-sectional view of the third embodiment of a millimeter wave radar device with a multi-surface waveguide antenna according to the present utility model;

[0030] Figure 6 This is an exploded schematic diagram of implementation scheme 3 of a multi-surface waveguide antenna millimeter wave radar device according to an embodiment of the utility model;

[0031] Figure 7 is the azimuth radiation pattern of the planar millimeter-wave radar waveguide antenna;

[0032] Figure 8 is the azimuth radiation pattern of the planar millimeter-wave radar microstrip antenna;

[0033] Fig. 9 It is the azimuth plane radiation pattern of the multi-faceted millimeter wave radar waveguide antenna;

[0034] The main component symbols are described as follows:

[0035] Radar rear shell 1, circuit board 2, multi-surface waveguide antenna assembly 3, radar front cover 4, radar interface connector 5. DETAILED DESCRIPTION

[0036] In order to enable those skilled in the art to better understand the present invention, the technical solution of the present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0037] Embodiment 1:

[0038] like Figure 1 and Figure 2 As shown, the multi-surface waveguide antenna millimeter wave radar is composed of a circuit board 2, a multi-surface waveguide antenna assembly 3, a radar front cover 4 and a radar rear shell 1, and a radar interface connector 5;

[0039] A circuit board 2, wherein a conductive layer on one side or a part of the conductive layer thereof includes at least one radar chip component soldered thereon, the radar chip component being located on the upper side or the lower side of the circuit board 1, the radar chip component having at least one radar signal transmitter and receiver, or having at least one radar signal transmitter and receiver on the circuit board;

[0040] The multi-surface waveguide antenna 3 has two antenna array surfaces, namely, waveguide antenna array surface A and surface B, on its upper side. Each antenna array surface has one or more antenna arrays for transmitting and receiving radar signals.

[0041] The connection between at least one transmitter and receiver of the radar chip assembly, or at least one radar signal transmitter and receiver on the circuit board, and at least one antenna array on each antenna array surface of the waveguide multi-surface antenna surface A and surface B is achieved through waveguide transmission.

[0042] The multi-surface waveguide antenna 3 is a waveguide antenna composed of two antenna array surfaces A and B, which can achieve a FOV detection angle range of more than 180 degrees.

[0043] The multi-faceted waveguide antenna 3 includes a slot waveguide antenna, a cavity waveguide antenna, a horn waveguide antenna, a gap waveguide antenna, an air-integrated waveguide antenna and other waveguide antennas.

[0044] The transmitter and / or receiver of the radar chip assembly may transmit and / or receive signals in the range of 20 GHz to 122 GHz, alternatively, frequencies outside this range (such as 1 GHz and 20 GHz), or frequencies between 122 GHz and 300 GHz.

[0045] The interface connector of the radar interface connector 5 is not limited to any interface connector.

[0046] Embodiment 2:

[0047] like Figure 3 and Figure 4As shown, the multi-surface waveguide antenna millimeter wave radar is composed of a circuit board 2, a multi-surface waveguide antenna assembly 3, a radar front cover 4 and a radar rear shell 1, and a radar interface connector 5;

[0048] A circuit board 2, wherein one side of the conductive layer or part of the conductive layer thereof includes at least one radar chip component soldered thereon, and the radar chip component is located on the upper side or the lower side of the circuit board 1. The radar chip component has at least one radar signal transmitter and receiver, or has at least one radar signal transmitter and receiver on the circuit board;

[0049] The multi-surface waveguide antenna 3 has three antenna array surfaces, namely, waveguide antenna array surface A, surface B and surface C, on its upper side. Each antenna array surface has one or more antenna arrays for transmitting and receiving radar signals.

[0050] The connection between at least one transmitter and / or receiver of the radar chip assembly, or at least one radar signal transmitter and receiver on the circuit board, and at least one antenna array on each antenna array surface of the waveguide multi-surface antenna surface A, surface B and surface C is achieved through waveguide transmission.

[0051] The multi-surface waveguide antenna 3 is a waveguide antenna composed of three antenna array surfaces, namely, surface A, surface B and surface C, and can achieve a FOV detection angle range of 360 degrees.

[0052] The multi-faceted waveguide antenna 3 includes but is not limited to a slot waveguide antenna, a cavity waveguide antenna, a horn waveguide antenna, a gap waveguide antenna, an air-integrated waveguide antenna, and other waveguide antennas.

[0053] The transmitter and / or receiver of the radar chip assembly can transmit and / or receive signals in the range of 20 GHz to 122 GHz. Alternatively, it can also be used as a frequency outside this range (such as 1 GHz and 20 GHz), or a frequency between 122 GHz and 300 GHz.

[0054] The interface connector of the radar interface connector 5 is not limited to any interface connector.

[0055] Embodiment three:

[0056] like Figure 3 Figure 4 As shown, the multi-surface waveguide antenna millimeter wave radar is composed of a circuit board 2, a multi-surface waveguide antenna assembly 3, a radar front cover 4 and a radar rear shell 1, and a radar interface connector 5;

[0057] A circuit board 2, wherein a conductive layer on one side or a part of the conductive layer thereof includes at least one radar chip component soldered thereon, the radar chip component being located on the upper side or the lower side of the circuit board 1, the radar chip component having at least one radar signal transmitter and receiver, or having at least one radar signal transmitter and receiver on the circuit board;

[0058] The multi-surface waveguide antenna 3 has four antenna array surfaces, namely waveguide antenna array surface A, surface B, surface C and surface D, on its upper side. Each antenna array surface has one or more antenna arrays for transmitting and receiving radar signals.

[0059] The connection between at least one transmitter and / or receiver of the radar chip assembly, or at least one radar signal transmitter and receiver on the circuit board, and at least one antenna array on each antenna array surface of the waveguide multi-surface antenna surface A, surface B, surface C and surface D is achieved through waveguide transmission.

[0060] The multi-surface waveguide antenna 3 is a waveguide antenna composed of four antenna array surfaces, namely surface A, surface B, surface C and surface D, and can achieve a FOV detection angle range of 360 degrees.

[0061] The multi-faceted waveguide antenna 3 includes but is not limited to a slot waveguide antenna, a cavity waveguide antenna, a horn waveguide antenna, a gap waveguide antenna, an air-integrated waveguide antenna, or other waveguide antennas.

[0062] The transmitter and / or receiver of the radar chip assembly can transmit and / or receive signals in the range of 20 GHz to 122 GHz. Alternatively, it can also be used as a frequency outside this range (such as 1 GHz and 20 GHz), or a frequency between 122 GHz and 300 GHz.

[0063] The interface connector of the radar interface connector 5 is not limited to any interface connector.

[0064] Furthermore, as a further extension of implementation plan three, the multi-faceted waveguide antenna is composed of a waveguide antenna array composed of N antenna array surfaces to form a waveguide antenna that is close to a spherical or ellipsoidal star, and together with the circuit board, the upper cover and the back shell, forms a spherical or ellipsoidal waveguide millimeter-wave radar, achieving a detection angle range without blind spots.

[0065] When the millimeter-wave radar detects a target, the antenna gain affects the detection distance of the millimeter-wave radar. Since the radiation pattern of the antenna has a certain beam width, the antenna gain decreases at a large angle. According to the radar equation:

[0066]

[0067] in:

[0068] P r is the received signal power;

[0069] P t is the transmitted signal power;

[0070] G t and G r are the gains of the radar transmitting and receiving antennas respectively;

[0071] σ is the target scattering cross-sectional area;

[0072] λ is the wavelength of the radar operating frequency;

[0073] R is the distance from the target to the radar.

[0074] It can be seen that if the gain is too low at large angles, the millimeter-wave radar will not be able to detect the target at large angles. According to the radar equation, if the target is to be detected at large angles, the gain at large angles can be set to be 10dB lower than the maximum gain.

[0075] refer to Figure 7 , is the azimuth plane radiation pattern of the planar millimeter wave radar waveguide antenna, in which the first conductive layer 6 of the planar waveguide antenna and the second conductive layer 7 of the planar waveguide antenna constitute a planar waveguide antenna assembly, and the first conductive layer 6 is electrically connected to the second conductive layer 7, and the second conductive layer of the planar waveguide antenna is also electrically connected to the PCB board 8. Figure 7 From the azimuth radiation pattern of the mid-plane waveguide antenna, it can be seen that the beam width is approximately 125° when the power drops 10 dB from the maximum value, which cannot meet the requirement of a 180° detection range.

[0076] refer to Figure 8 , is the azimuth plane radiation pattern of the planar millimeter wave radar microstrip antenna. In another figure, the first conductive layer 9 of the planar microstrip antenna and the PCB board 10 constitute a planar microstrip antenna component, and the first conductive layer 9 is etched on the surface of the PCB board 10. Figure 8 From the azimuth radiation pattern of the planar microstrip antenna, it can be seen that the beam width is about 145° when the power drops 10dB from the maximum value, which cannot meet the requirement of 180° detection range. In addition, for waveguide antenna units and microstrip antenna units of the same size, the gain of the waveguide antenna unit is about 2.5dB higher than that of the microstrip antenna unit. Therefore, according to the analysis, even if the beam width of the planar microstrip antenna in the azimuth plane is about 20° wider than that of the planar waveguide antenna, the overall radiation power is much lower than that of the planar waveguide antenna, and the low-gain antenna will cause a decrease in detection distance. Moreover, the beam width of the planar microstrip antenna in the azimuth plane when the maximum power value drops by 10dB cannot meet the scenario with 180° detection requirements.

[0077] refer to Fig. 9, is the azimuth plane radiation pattern of the multi-faceted millimeter wave radar waveguide antenna. In the figure, the first conductive layer 11 of the multi-faceted waveguide antenna and the second conductive layer 12 of the multi-faceted waveguide antenna constitute a multi-faceted waveguide antenna assembly, and the first conductive layer 11 and the second conductive layer 12 are electrically connected. In addition, the first conductive layer 11 of the multi-faceted waveguide antenna is divided into two axially symmetrical surfaces A and B, wherein each of the A and B surfaces has at least one transmitting and receiving antenna unit. Fig. 9 From the azimuth radiation pattern of the A-plane antenna in the multi-plane waveguide antenna assembly, it can be seen that the beam width range is approximately -50° to +90° when the power drops 10dB from the maximum value. Fig. 9 From the azimuth radiation pattern of the B-plane antenna in the multi-surface waveguide antenna assembly, it can be seen that the beam width range is approximately -90° to +50° when the power drops 10dB from the maximum value. Considering the complementary characteristics of the A-plane and B-plane antennas, it can be obtained that the detection range of the multi-surface waveguide antenna in the azimuth plane meets the application scenario of 180°, where the complementary radiation pattern of the A-plane and B-plane reference Fig. 9 The A surface + B surface curve in the figure. Moreover, the unit gain of the multi-surface waveguide antenna is about 2.5dB higher than that of the microstrip antenna. Therefore, the multi-surface waveguide antenna can meet the requirements of long detection distance and large angle application scenarios.

[0078] The utility model adopts a PCB board and combines waveguide antenna and antenna 3D array technology to achieve the required large-scale detection. It adopts the design of multiple waveguide antenna array surfaces. Multiple antennas are arranged on each antenna array surface for transmitting and receiving radar signals. This design can effectively increase the angular detection range, so that the radar can cover a wider area. The antennas are arranged in 3D space, so that each antenna can effectively cover a specific direction, thereby achieving all-round coverage. By optimizing the layout of the antennas, the performance and angular coverage of the radar can be maximized.

[0079] The above embodiments are merely illustrative of the principles and effects of the present invention, and are not intended to limit the present invention. Anyone familiar with the technology may modify or change the above embodiments without violating the spirit and scope of the present invention. Therefore, all equivalent modifications or changes made by those with ordinary knowledge in the relevant technical field without departing from the spirit and technical ideas disclosed in the present invention shall still be covered by the claims of the present invention.

Claims

1. A multi-surface waveguide antenna millimeter wave radar device, characterized in that: It comprises a circuit board (2), a multi-faceted waveguide antenna assembly (3), a radar front cover (4), a radar rear shell (1), and a radar interface connector (5); A circuit board (2), wherein a conductive layer on one side and a part of the conductive layer thereof include at least one radar chip component welded thereon, wherein the radar chip component has at least one radar signal transmitter and receiver, and the circuit board (2) may also have at least one radar signal transmitter and receiver; The multi-surface waveguide antenna assembly (3) has more than one waveguide antenna array surface on its upper side, and each antenna array surface has more than one antenna array for transmitting and receiving radar signals.

2. A multi-surface waveguide antenna millimeter wave radar device according to claim 1, characterized in that: The connection between at least one transmitter and receiver of the radar chip assembly, and at least one radar signal transmitter and receiver on the circuit board, and at least one antenna array of the multi-surface waveguide antenna assembly (3) is achieved through waveguide transmission.

3. The multi-surface waveguide antenna millimeter wave radar device according to claim 2, characterized in that: The multi-surface waveguide antenna assembly (3) comprises two antenna array surfaces, three antenna array surfaces, four antenna array surfaces and more than four antenna array surfaces.

4. The multi-surface waveguide antenna millimeter wave radar device according to claim 3, characterized in that: A waveguide antenna composed of two antenna array surfaces can achieve a FOV detection angle range of more than 180 degrees, and a waveguide antenna composed of three or more antenna array surfaces can achieve a FOV detection angle range of 360 degrees.

5. The multi-surface waveguide antenna millimeter wave radar device according to claim 4, characterized in that: The multi-faceted waveguide antenna assembly (3) comprises a slot waveguide antenna, a cavity waveguide antenna, a horn waveguide antenna, a gap waveguide antenna, an air integrated waveguide antenna and other waveguide antennas.

Images