20T20R multi-port automobile radar antenna

Abstract

The utility model discloses a 20T20R multiport automobile radar antenna, the 20T20R multiport automobile radar antenna is composed of five 4T4R radar antennas, the 20T20R multiport automobile radar antenna comprises an integration module layer, a feed network layer and a radiation antenna layer, the integration module layer comprises five 4T4R integration module units, each 4T4R integration module unit comprises a PCB board, and the PCB board is connected with the feed network layer and the radiation antenna layer. The upper surface of each PCB is provided with a waveguide chip, and the upper surface of the integrated module layer is provided with a high-speed synchronous serial port. Compared with the prior art, a design scheme of five 4T4R waveguide slot antennas is adopted, and a multi-transmitting and multi-receiving framework is adopted. And the 90GHZ frequency is higher, and the wavelength is shorter, so that the wave beam is narrower and the energy is more concentrated under the condition of the same size. The final result is that more antennas can be integrated on a small area, so that communication of 400 channels is realized, and the error-tolerant rate is higher. For example, the pixels of the camera are densely arranged to capture information at more angles.

Description

Technical Field

[0001] The utility model relates to the technical field of automobile radar antennas, in particular to a 20T20R multi-port automobile radar antenna. Background Art

[0002] As autonomous driving technology brings more and more comfortable experiences to people, antennas, as the main transmitter and receiver, help radar quickly and accurately obtain information about the physical environment around the vehicle. The original single-channel and four-channel antennas are no longer able to track and analyze multiple surrounding targets.

[0003] To address these issues, multi-channel waveguide antennas have emerged. Currently, waveguide antennas can confine electromagnetic waves within a hollow metal core during transmission, significantly reducing energy loss. To this end, this utility model proposes a 20T20R multi-port automotive radar antenna. Utility Model Content

[0004] The purpose of the present utility model is to provide a 20T20R multi-port automotive radar antenna to solve the problems raised in the above background technology.

[0005] To achieve the above-mentioned objectives, the present invention provides the following technical solutions: a 20T20R multi-port automotive radar antenna, the 20T20R multi-port automotive radar antenna being composed of five 4T4R radar antennas, the 20T20R multi-port automotive radar antenna comprising an integrated module layer, a feed network layer and a radiating antenna layer, the integrated module layer comprising five 4T4R integrated module units, each 4T4R integrated module unit comprising a PCB board, each of the PCB boards being provided with a waveguide chip on its upper surface, the upper surface of the integrated module layer being provided with a high-speed synchronous serial port, and the lower surface of each of the PCB boards being provided with a waveguide chip input port, the feed network layer comprising five 4T4R feed network units, the radiating antenna layer comprising five 4T4R radiating antenna units, the 4T4R integrated module unit, the 4T4R feed network unit and the 4T4R radiating antenna unit located in the same vertical position constituting a 4T4R radar antenna.

[0006] As a preferred technical solution of the present utility model, the 20T20R multi-port automotive radar antenna has a concave structure.

[0007] As a preferred technical solution of the present invention, each of the 4T4R feed network units includes a feed network layer plate, the upper surface of the feed network layer plate is provided with a waveguide feeding port connected to the waveguide chip input port, and the lower surface of the feed network layer plate is provided with a waveguide feeding network.

[0008] As a preferred technical solution of the present invention, each of the 4T4R radiating antenna units includes a radiating antenna board, and the upper surface of the radiating antenna board is provided with an air waveguide feeding network connected to the waveguide feeding network.

[0009] As a preferred technical solution of the present invention, four groups of transmitting antennas and four groups of receiving antennas are provided on the lower surface of each of the radiating antenna plates.

[0010] As a preferred technical solution of the present invention, each transmitting antenna group and each receiving antenna group are provided with six radiation ports.

[0011] As a preferred technical solution of the present invention, the frequency range is 76-79 GHz.

[0012] Compared with the prior art, the beneficial effects of the present invention are:

[0013] This new 20T20R multi-port automotive radar antenna utilizes five 4T4R waveguide slot antennas, with the upper and lower layers soldered together using SMT. Each antenna's feed port is secured to a PCB containing a waveguide chip using screws, ensuring a full connection between the lower antenna and the waveguide chip. The data then enters the algorithm chip via a high-speed synchronous serial port for further processing.

[0014] A single 4T4R antenna can be as small as 40mm*55mm*8mm, effectively reducing costs. This solution utilizes five 4T4R antennas in a multi-transmitter, multi-receiver architecture. The higher frequency and shorter wavelength of 90GHz result in narrower beams and more concentrated energy for the same size. The result is that more antennas can be integrated into a smaller area, enabling 400 communication channels with greater fault tolerance. Much like the pixels in a camera, they are densely packed to capture more angles.

[0015] Other features and advantages of the present invention will be described in detail in the following specific embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0017] Figure 2 This is a schematic diagram of the top view of the integrated module layer of the present invention;

[0018] Figure 3 This is a bottom-up structural diagram of the integrated module layer of the present invention;

[0019] Figure 4 This is a schematic diagram of the top view of the feed network layer of the present invention;

[0020] Figure 5 This is a bottom-up structural diagram of the feed network layer of the present invention;

[0021] Figure 6 This is a schematic diagram of the top view of the radiation antenna layer of the present invention;

[0022] Figure 7 This is a bottom-up structural diagram of the radiation antenna layer of the present invention;

[0023] In the figure: 1. Integrated module layer; 2. Feed network layer; 3. Radiating antenna layer; 10. 4T4R radar antenna; 100. 4T4R integrated module unit; 101. PCB board; 102. Waveguide chip; 103. High-speed synchronous serial port; 104. Waveguide chip input port; 200. 4T4R feed network unit; 201. Feed network layer board; 202. Waveguide feed port; 203. Waveguide feed network; 300. 4T4R radiating antenna unit; 301. Radiating antenna board; 302. Air waveguide feed network; 310. Transmitting antenna group; 320. Receiving antenna group. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0025] In the description of the present invention, it should be noted that the terms "vertical", "up", "down", "horizontal", etc. indicating orientations or positional relationships are based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they cannot be understood as limitations on the present invention.

[0026] It should also be noted that, in the description of this utility model, unless otherwise expressly specified or limited, the terms "disposed," "installed," "connected," and "connected" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integral connections; they may refer to mechanical connections or electrical connections; they may refer to direct connections or indirect connections through an intermediate medium; and they may refer to internal communication between two components. Those skilled in the art will be able to understand the specific meanings of the above terms in this utility model based on specific circumstances.

[0027] See also Figure 1-7In this embodiment, a 20T20R multi-port automotive radar antenna is provided. The 20T20R multi-port automotive radar antenna is composed of five 4T4R radar antennas 10. The 20T20R multi-port automotive radar antenna includes an integrated module layer 1, a feed network layer 2, and a radiating antenna layer 3. The integrated module layer 1 includes five 4T4R integrated module units 100. Each 4T4R integrated module unit 100 includes a PCB board 101. Each PCB board 101 has a waveguide chip 102 on its upper surface. The upper surface of the integrated module layer 1 is provided with a high-speed synchronous serial port 103, and the lower surface of each PCB board 101 is provided with a waveguide chip input port 104. The feed network layer 2 includes five 4T4R feed network units 200. The radiating antenna layer 3 includes five 4T4R radiating antenna units 300. The 4T4R integrated module units 100, the 4T4R feed network unit 200, and the 4T4R radiating antenna unit 300 located in the same vertical position constitute a 4T4R radar antenna 10.

[0028] In this embodiment, the 20T20R multi-port automotive radar antenna has a concave structure and a frequency range of 76-79 GHz.

[0029] In this embodiment, each 4T4R feed network unit 200 includes a feed network layer board 201, the upper surface of the feed network layer board 201 is provided with a waveguide feeding port 202 connected to the waveguide chip input port 104, and the lower surface of the feed network layer board 201 is provided with a waveguide feeding network 203.

[0030] In this embodiment, each 4T4R radiating antenna unit 300 includes a radiating antenna board 301 , and an air waveguide feeding network 302 connected to the waveguide feeding network 203 is provided on the upper surface of the radiating antenna board 301 .

[0031] In this embodiment, four transmitting antenna groups 310 and four receiving antenna groups 320 are provided on the lower surface of each radiating antenna board 301 .

[0032] In this embodiment, each transmitting antenna group 310 and each receiving antenna group 320 are provided with six radiation ports.

[0033] It should be noted that traditional waveguide slots are machined using metal. This solution has obvious disadvantages, such as high cost, heavy weight, poor batch consistency, and limited production capacity. It is not very friendly to the large-scale production of automotive radar antennas.

[0034] In order to overcome the above limitations, the applicant adopted a treatment method of metallization electroplating after plastic injection molding, thereby solving the above shortcomings at one stroke. Injection molding ensures the consistency of the product batch process. In addition, low-roughness electroplating successfully solves the problem of plastic non-conductivity. The low roughness makes its electrical performance reach the same level as that of metal antennas.

[0035] Radar waveguide antennas have low insertion loss, and their transmission network uses a closed waveguide. There is almost no influence between the transmission channels of each antenna, and it is easy to achieve a large-bandwidth working mode and obtain higher resolution, which can enable millimeter-wave radar to play a greater role in areas such as automotive collision avoidance, pedestrian detection, and traffic monitoring.

[0036] A design scheme employs five 4T4R waveguide slot antennas, with upper and lower layers soldered together using SMT. Each antenna's feed port is secured to a PCB 101 mounted with a waveguide chip 102 using screws, ensuring a full connection between the lower antenna and the waveguide chip. The data then enters the algorithm chip via a high-speed synchronous serial port 103 for further processing.

[0037] A single 4T4R antenna can be as small as 40mm*55mm*8mm, effectively reducing costs. This solution utilizes five 4T4R antennas in a multi-transmitter, multi-receiver architecture. The higher frequency and shorter wavelength of 90GHz result in narrower beams and more concentrated energy for the same size. The result is that more antennas can be integrated into a smaller area, enabling 400 communication channels with greater fault tolerance. Much like the pixels in a camera, they are densely packed to capture more angles.

[0038] This application also proposes a method for manufacturing a 20T20R multi-port automotive radar antenna, which includes the following steps:

[0039] Use modified plastic raw materials (including PPS, PEI, PEEK and modified materials with various minerals and glass fiber) for injection molding to produce 4mm upper and middle layer materials;

[0040] The material is vacuum-coated using the PVD process. Copper is first plated on the surface of the base layer, and then other plating layers (such as silver, tin, nickel, etc.) are added on top of the copper layer.

[0041] There are many plating options, including Cu5Ag3 and Cu5Sn3.

[0042] In the intermediate feed network layer 2, in order to ensure leakage during network transmission, a 0.3mm*0.3mm groove is opened around the network;

[0043] Use a custom stepped steel mesh to fill the sealed slots with medium-temperature solder paste;

[0044] Use precision positioning hole technology to assemble according to the tolerance requirements of the upper and lower layers;

[0045] The product is fixed on the tooling through customized welding tooling;

[0046] Put the tooling and the product into the reflow oven for soldering, the soldering temperature is 150-280℃;

[0047] The integrated module layer 1 solders the PCB, waveguide chip and high-speed synchronous serial port through SMT process;

[0048] After the integrated module and antenna are positioned, screws or sealants are used to ensure that the waveguide feed port is tightly connected to the waveguide chip input port.

[0049] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are merely illustrative of the principles of the present invention. Various changes and improvements may be made to the present invention without departing from the spirit and scope of the present invention. Such changes and improvements are intended to fall within the scope of the present invention. The scope of protection claimed in this invention is defined by the appended claims and their equivalents.

Claims

1. 20T20R multi-port automotive radar antenna, characterized by: The 20T20R multi-port automobile radar antenna is composed of five 4T4R radar antennas (10). The 20T20R multi-port automobile radar antenna comprises an integrated module layer (1), a feed network layer (2) and a radiation antenna layer (3). The integrated module layer (1) comprises five 4T4R integrated module units (100). Each 4T4R integrated module unit (100) comprises a PCB board (101). The upper surface of each PCB board (101) is provided with a waveguide chip (102). The upper surface of the integrated module layer (1) A high-speed synchronous serial port (103) is provided, and a waveguide chip input port (104) is provided on the lower surface of each PCB board (101). The feed network layer (2) includes five 4T4R feed network units (200), and the radiation antenna layer (3) includes five 4T4R radiation antenna units (300). The 4T4R integrated module unit (100), the 4T4R feed network unit (200), and the 4T4R radiation antenna unit (300) located at the same vertical position constitute a 4T4R radar antenna (10).

2. The 20T20R multi-port automotive radar antenna according to claim 1, characterized in that: The 20T20R multi-port automotive radar antenna has a concave structure.

3. The 20T20R multi-port automotive radar antenna according to claim 1, characterized in that: Each of the 4T4R feed network units (200) comprises a feed network layer plate (201), the upper surface of the feed network layer plate (201) is provided with a waveguide feed port (202) connected to the waveguide chip input port (104), and the lower surface of the feed network layer plate (201) is provided with a waveguide feed network (203).

4. The 20T20R multi-port automotive radar antenna according to claim 3, characterized in that: Each of the 4T4R radiating antenna units (300) comprises a radiating antenna board (301), and an air waveguide feeding network (302) connected to a waveguide feeding network (203) is provided on an upper surface of the radiating antenna board (301).

5. The 20T20R multi-port automotive radar antenna according to claim 4, characterized in that: The lower surface of each radiation antenna plate (301) is provided with four transmitting antenna groups (310) and four receiving antenna groups (320).

6. The 20T20R multi-port automotive radar antenna according to claim 5, characterized in that: Each transmitting antenna group (310) and each receiving antenna group (320) are provided with six radiation ports.

7. The 20T20R multi-port automotive radar antenna according to claim 1, characterized in that: Its frequency range is 76-79GHz.

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