3T4R multi-port automobile radar antenna integration module

Abstract

The utility model discloses a 3T4R multiport automobile radar antenna integration module, which comprises an integration module unit, a feed network unit and a radiation antenna unit, the integration module unit comprises a PCB, the upper surface of the PCB is provided with a waveguide chip and a high-speed synchronous serial port, the lower surface of the PCB is provided with a waveguide chip input port, and the waveguide chip input port is connected with the high-speed synchronous serial port. The waveguide chip input port is provided with seven waveguide ports, and the feed network unit comprises a feed network layer plate; compared with the prior art, the 3T4R multi-port automobile radar antenna integrated module provided by the utility model has the advantages that the radiation efficiency is greatly improved compared with that of a microstrip antenna by utilizing the waveguide slot antenna, the transmission loss is synchronously reduced due to the adoption of air waveguide in a feed network, and in a low-requirement algorithm scene, the 3T4R multi-port automobile radar antenna integrated module of the three transmitting antenna groups 310 is adopted; compared with 4T4R, the device has the advantages that the manufacturing cost is low, and the cost performance is higher in the scenes such as monitoring, environment detection, angle radars on automobiles, door radars and the like which have no particularly high precision requirements.

Description

Technical Field

[0001] The utility model relates to the technical field of automobile radar antennas, in particular to a 3T4R multi-port automobile radar antenna integrated module. Background Art

[0002] As autonomous driving technology matures, the existing microstrip patch antenna format has suffered from loss and radiation efficiency issues, resulting in a decrease in detection distance and accuracy, and can no longer meet the required detection distance and accuracy. The waveguide slot antenna format improves radiation efficiency and reduces transmission loss, and uses a suppressed sidelobe amplitude and phase distribution to reduce interference.

[0003] Currently, our company utilizes a rational layering approach for waveguide slot antennas, using injection molding to create complex 3D models in a single step. Using a plastic electroplating process, we metallize the plastic surface to a roughness within 1.0 mm, comparable to metal. This metallization ensures the antenna's electrical performance is consistent with that of metal, significantly reducing product weight and machining costs. It also improves product consistency during mass production, becoming a major trend in automotive radar antennas.

[0004] Among them, during the research and development process, the inventor developed a technology that can directly connect the waveguide chip with the antenna, and simultaneously applied for a utility model patent for the 4T4R multi-port automotive radar antenna integrated module. However, the inventor also found that this 4T4R multi-port antenna integrated module uses 4 sets of transceiver antenna ports, which increases its production cost. In some application scenarios with low algorithm requirements, there is no high-performance, low transmission loss and low-cost antenna integrated module. For this reason, the utility model proposes a 3T4R multi-port automotive radar antenna integrated module. Utility Model Content

[0005] The purpose of the present utility model is to provide a 3T4R multi-port automotive radar antenna integrated module to solve the problems raised in the above background technology.

[0006] To achieve the above-mentioned objectives, the present invention provides the following technical solutions: a 3T4R multi-port automotive radar antenna integrated module, comprising an integrated module unit, a feed network unit and a radiating antenna unit, wherein the integrated module unit comprises a PCB board, the upper surface of the PCB board is provided with a waveguide chip and a high-speed synchronous serial port, the lower surface of the PCB board is provided with a waveguide chip input port, and seven waveguide ports are provided on the waveguide chip input port, the feed network unit comprises a feed network layer board, the upper surface of the feed network layer board is provided with a waveguide feed port corresponding to the position of the waveguide chip input port, and the waveguide feed port is provided with seven feed ports corresponding one-to-one to the waveguide port positions, the lower surface of the feed network layer board is provided with a waveguide feeding network, the radiating antenna unit comprises a radiating antenna board, the upper surface of the radiating antenna board is provided with an air waveguide feeding network, and the lower surface of the radiating antenna board is provided with three groups of transmitting antenna groups and four groups of receiving antenna groups.

[0007] As a preferred technical solution of the present invention, the integrated module unit is located above the feed network unit, and the feed network unit is located above the radiation antenna unit.

[0008] As a preferred technical solution of the present invention, the waveguide feeding port is connected to a waveguide feeding network, and the number of the waveguide feeding networks is seven.

[0009] As a preferred technical solution of the present invention, the air waveguide feeding network is located directly below the waveguide feeding network, and the number of air waveguide feeding networks is seven, and the seven air waveguide feeding networks are respectively connected to three groups of transmitting antenna groups and four groups of receiving antenna groups.

[0010] As an optimal technical solution of the present invention, the three groups of transmitting antenna groups are respectively the first transmitting antenna, the second transmitting antenna and the third transmitting antenna, and the four groups of receiving antenna groups are respectively the first receiving antenna, the second receiving antenna, the third receiving antenna and the fourth receiving antenna, and the first transmitting antenna, the second transmitting antenna, the third transmitting antenna, the first receiving antenna, the second receiving antenna, the third receiving antenna and the fourth receiving antenna are each provided with six radiation ports.

[0011] As a preferred technical solution of the present invention, the frequency range of the 3T4R multi-port automotive radar antenna integrated module is 79-81 GHz.

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

[0013] The 3T4R multi-port automotive radar antenna integrated module of the present invention utilizes a waveguide slot antenna to significantly improve radiation efficiency compared to a microstrip antenna. At the same time, since the feed network uses an air waveguide, transmission loss is also reduced simultaneously. Moreover, in low-requirement algorithm scenarios, the 3T4R multi-port automotive radar antenna integrated module using three groups of transmitting antenna groups 310 has a low production cost compared to 4T4R, and is more cost-effective in scenarios such as monitoring, environmental detection, corner radars on cars, door radars, etc., where precision requirements are not particularly high.

[0014] Other features and advantages of the present invention will be described in detail in the following specific embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0016] Figure 2 This is a schematic diagram of the top view of the integrated module unit of the present utility model;

[0017] Figure 3 This is a bottom-up structural diagram of the integrated module unit of the present invention;

[0018] Figure 4 This is a schematic diagram of the top view of the feed network unit of the present invention;

[0019] Figure 5 This is a bottom view structural diagram of the feed network unit of the present invention;

[0020] Figure 6 This is a schematic diagram of the top view of the radiating antenna unit of the present invention;

[0021] Figure 7 This is a schematic diagram of the bottom-up structure of the radiating antenna unit of the present invention;

[0022] Figure 8 A schematic diagram of the simulation direction proposed in the embodiment of the present utility model;

[0023] Figure 9 For the utility model Figure 8 The left side enlarged schematic diagram;

[0024] Figure 10 For the utility model Figure 8 The enlarged schematic diagram on the right side of

[0025] Figure 11 Schematic diagram of a standing wave test curve proposed in an embodiment of the present invention;

[0026] In the figure: 100, integrated module unit; 101, PCB board; 102, waveguide chip; 103, high-speed synchronous serial port; 104, waveguide chip input port; 105, waveguide port; 200, feed network unit; 201, feed network layer; 202, waveguide feeding port; 203, waveguide feeding network; 204, feed port; 300, radiating antenna unit; 301, radiating antenna board; 302, air waveguide feeding network; 310, transmitting antenna group; 311, first transmitting antenna; 312, second transmitting antenna; 313, third transmitting antenna; 320, receiving antenna group; 321, first receiving antenna; 322, second receiving antenna; 323, third receiving antenna; 324, fourth receiving antenna. DETAILED DESCRIPTION

[0027] 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.

[0028] 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.

[0029] 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.

[0030] See also Figure 1-11In this embodiment, a 3T4R multi-port automotive radar antenna integrated module is provided, including an integrated module unit 100, a feed network unit 200, and a radiating antenna unit 300. The integrated module unit 100 includes a PCB board 101. The upper surface of the PCB board 101 is provided with a waveguide chip 102 and a high-speed synchronous serial port 103. The lower surface of the PCB board 101 is provided with a waveguide chip input port 104. The waveguide chip input port 104 is provided with seven waveguide ports 105. The 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 chip input port 104. The corresponding waveguide feeding port 202 is provided with seven feeding ports 204 corresponding to the positions of the waveguide ports 105. The lower surface of the feed network layer 201 is provided with a waveguide feeding network 203. The radiating antenna unit 300 includes a radiating antenna board 301. The upper surface of the radiating antenna board 301 is provided with an air waveguide feeding network 302. The lower surface of the radiating antenna board 301 is provided with three groups of transmitting antenna groups 310 and four groups of receiving antenna groups 320. The frequency range of the 3T4R multi-port automotive radar antenna integrated module is 79-81GHz. The integrated module unit 100 is located in the feed network unit 20 0, the feed network unit 200 is located above the radiating antenna unit 300, the waveguide feeding port 202 is connected to the waveguide feeding network 203, and the number of the waveguide feeding networks 203 is seven, the air waveguide feeding network 302 is located directly below the waveguide feeding network 203, and the number of the air waveguide feeding network 302 is seven, and the seven air waveguide feeding networks 302 are respectively connected to the three transmitting antenna groups 310 and the four receiving antenna groups 320, the three transmitting antenna groups 310 are respectively the first transmitting antenna 311, the second transmitting antenna 312 and the third transmitting antenna 313, and the four receiving antenna groups 3 20 are the first receiving antenna 321, the second receiving antenna 322, the third receiving antenna 323, and the fourth receiving antenna 324, and the first transmitting antenna 311, the second transmitting antenna 312, the third transmitting antenna 313, the first receiving antenna 321, the second receiving antenna 322, the third receiving antenna 323, and the fourth receiving antenna 324 are each provided with six radiation ports. The antenna is directly connected to the waveguide chip, omitting the original microstrip to waveguide transmission line, greatly reducing the loss caused by the transmission and switching process. The air waveguide also greatly reduces the network computing power of the antenna itself, effectively improving the overall radiation efficiency of the antenna.

[0031] It should be noted that in this embodiment, a plastic metallized waveguide structure design is adopted, and the antenna is divided into 3 transmitting antennas and 4 receiving antennas. After being finally connected to the radar RF waveguide chip 102, it enters the microcontroller through the high-speed synchronous serial port 103 to perform subsequent work such as unit data verification.

[0032] This solution completes the antenna selection and design simulation, network design simulation, antenna material selection, structural mold processing, assembly and surface treatment process evaluation.

[0033] The specific implementation method is:

[0034] In order to meet the requirements of near-field receiving and transmitting antenna gain and 3dB beamwidth in vertical section, a 2*0.6mm gap is used, and the unit spacing is arranged in a periodic integer multiple of 2.93mm. Each antenna uses 6 radiating elements. In order to achieve the requirements of high gain and low sidelobe, Taylor amplitude-phase design is used between the radiating ports. The simulated radiation pattern of a single antenna is shown as follows: Figure 8-10 As shown, the standing wave test curve diagram is as follows Figure 11 As shown, the waveguide feeding port adopts a multi-level anti-leakage design to ensure that there is no leakage between the waveguide port and the active interface.

[0035] In the embodiment, the use of waveguide slot antennas can greatly improve the radiation efficiency compared to microstrip antennas. At the same time, since the feeding network uses air waveguides, the transmission loss is also reduced simultaneously. In low-requirement algorithm scenarios, the 3T4R multi-port automotive radar antenna integrated module using three groups of transmitting antenna groups 310 has a low production cost compared to 4T4R, and is more cost-effective in scenarios such as monitoring, environmental detection, corner radars on cars, door radars, etc. where the accuracy requirements are not particularly high.

[0036] 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. 3T4R multi-port automotive radar antenna integrated module, characterized by: The invention comprises an integrated module unit (100), a feed network unit (200) and a radiation antenna unit (300), wherein the integrated module unit (100) comprises a PCB board (101), the upper surface of the PCB board (101) is provided with a waveguide chip (102) and a high-speed synchronous serial port (103), the lower surface of the PCB board (101) is provided with a waveguide chip input port (104), and the waveguide chip input port (104) is provided with seven waveguide ports (105), and the feed network unit (200) comprises a feed network layer board (201), the upper surface of the feed network layer board (201) is provided with A waveguide feeding port (202) is provided corresponding to the position of the waveguide chip input port (104), and seven feeding ports (204) are provided on the waveguide feeding port (202) corresponding to the positions of the waveguide ports (105). The lower surface of the feeding network layer (201) is provided with a waveguide feeding network (203). The radiating antenna unit (300) includes a radiating antenna board (301), the upper surface of the radiating antenna board (301) is provided with an air waveguide feeding network (302), and the lower surface of the radiating antenna board (301) is provided with three groups of transmitting antennas (310) and four groups of receiving antennas (320).

2. The 3T4R multi-port automotive radar antenna integrated module according to claim 1, characterized in that: The integrated module unit (100) is located above the feed network unit (200), and the feed network unit (200) is located above the radiation antenna unit (300).

3. The 3T4R multi-port automotive radar antenna integrated module according to claim 1, characterized in that: The waveguide feeding port (202) is connected to a waveguide feeding network (203), and the number of the waveguide feeding networks (203) is seven.

4. The 3T4R multi-port automotive radar antenna integrated module according to claim 3, characterized in that: The air waveguide feeding network (302) is located directly below the waveguide feeding network (203), and there are seven air waveguide feeding networks (302). The seven air waveguide feeding networks (302) are respectively connected to three transmitting antenna groups (310) and four receiving antenna groups (320).

5. The 3T4R multi-port automotive radar antenna integrated module according to claim 1, characterized in that: The three transmitting antenna groups (310) are respectively a first transmitting antenna (311), a second transmitting antenna (312) and a third transmitting antenna (313); the four receiving antenna groups (320) are respectively a first receiving antenna (321), a second receiving antenna (322), a third receiving antenna (323) and a fourth receiving antenna (324); and the first transmitting antenna (311), the second transmitting antenna (312), the third transmitting antenna (313), the first receiving antenna (321), the second receiving antenna (322), the third receiving antenna (323) and the fourth receiving antenna (324) are each provided with six radiation ports.

6. The 3T4R multi-port automotive radar antenna integrated module according to claim 1, characterized in that: The frequency range of the 3T4R multi-port automotive radar antenna integrated module is 79-81 GHz.

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