MIMO radar device applied to W wave band

Abstract

The utility model discloses an MIMO radar device applied to a W wave band, which belongs to the field of vehicle-mounted radars, and comprises a bottom shell and an upper cover, the bottom shell and the upper cover are detachably connected, an accommodating cavity is enclosed between the bottom shell and the upper cover, an antenna plate, an annular wave absorbing piece and a metal shielding plate are arranged in the accommodating cavity, a first supporting boss is arranged on the side wall of the bottom shell, and a second supporting boss is arranged on the side wall of the bottom shell. The metal shielding plate is installed on the first supporting boss, the annular wave absorbing piece is pressed between the metal shielding plate and the upper cover, and the antenna plate is connected with the metal shielding plate and located on the inner side of the annular wave absorbing piece. A plurality of groups of receiving antenna arrays and a group of transmitting antenna arrays are arranged on the surface of one side, facing the upper cover, of the antenna plate, each group of receiving antenna arrays comprises a plurality of receiving antenna units which are sequentially distributed in the length direction of the antenna plate, and the transmitting antenna arrays comprise a plurality of transmitting antenna units which are sequentially distributed in the length direction of the antenna plate; therefore, the interference of external electromagnetic signals can be reduced, and the detection performance of the radar is improved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of vehicle-mounted radar, concretely relates to a MIMO radar device applied to W wave band. BACKGROUND

[0002] Generally, millimeter wave radar has very strong penetration ability, which can accurately detect objects through light, rain, dust or fog, by sending radio waves and receiving echoes, and by measuring the distance and speed of the target through frequency changes, overcoming the poor detection of laser and ultrasonic radar in harsh environments, and thus being widely used in the field of automobiles to realize the functions of automobile collision avoidance, automatic parking and pedestrian detection.

[0003] The commonly used vehicle-mounted radar comprises a bottom shell and an upper cover, the bottom shell and the upper cover are detachably connected, a containing cavity is surrounded between the bottom shell and the upper cover, an antenna plate is arranged in the containing cavity, electromagnetic waves can be received and emitted through the antenna plate, and the detection and communication functions of the vehicle-mounted radar can be realized. However, the antenna plate in the existing vehicle-mounted radar is easily disturbed by external electromagnetic signals, and thus the detection performance of the antenna plate is affected. SUMMARY

[0004] In order to solve the above problems in the prior art, the utility model provides a MIMO radar device applied to W wave band. The technical problems to be solved by the utility model are solved through the following technical schemes:

[0005] In one embodiment of the utility model, the side surface of the metal shielding plate facing the antenna plate is provided with a support column, one end of the support column is connected with the metal shielding plate, the other end of the support column is connected with the antenna plate, the antenna plate and the metal shielding plate are parallel to each other and there is a heat dissipation gap between the two.

[0006] The side surface of the antenna plate facing the upper cover is provided with a plurality of groups of receiving antenna arrays and a group of transmitting antenna arrays, each group of receiving antenna arrays comprises a plurality of receiving antenna units distributed along the length direction of the antenna plate in sequence, the transmitting antenna array comprises a plurality of transmitting antenna units distributed along the length direction of the antenna plate in sequence, and the spacing between two adjacent receiving antenna units is less than 1 / 5 of the spacing between two adjacent transmitting antenna units.

[0007] In one embodiment of the utility model, the side surface of the metal shielding plate facing the antenna plate is provided with a support column, one end of the support column is connected with the metal shielding plate, the other end of the support column is connected with the antenna plate, the antenna plate and the metal shielding plate are parallel to each other and there is a heat dissipation gap between the two.

[0008] In one embodiment of the utility model, support column is equipped with a plurality, and a plurality of support columns symmetry sets up at both sides of metal shielding board.

[0009] In one embodiment of the utility model, metal shielding board still is equipped with first radiating block on the side surface towards antenna board, and the upper surface of first radiating block and the lower surface of antenna board are connected.

[0010] In one embodiment of the utility model, antenna board includes front plate part and rear plate part, and the distance between rear plate part and upper cover is less than the distance between front plate part and upper cover, and a plurality of groups of receiving antenna array are arranged on rear plate part, and one group of transmitting antenna array is arranged on front plate part.

[0011] In one embodiment of the utility model, the circuit board is arranged between the metal shielding plate and the bottom wall of the bottom shell, the second support boss is arranged on the side wall of the bottom shell, the distance between the second support boss and the upper cover is greater than the distance between the first support boss and the upper cover, and the circuit board is installed on the second support boss.

[0012] The side surface of the metal shielding plate away from the antenna board is provided with a support block, one end of the support block is connected with the metal shielding plate, and the other end abuts against the upper surface of the circuit board, and a gap exists between the metal shielding plate and the circuit board.

[0013] In one embodiment of the utility model, the support block is provided with two, and the two support blocks are arranged on both sides of the metal shielding plate along the width direction of the metal shielding plate.

[0014] The side of the support block away from the metal shielding plate is in a sawtooth-shaped protruding structure.

[0015] In one embodiment of the utility model, the bottom wall of the bottom shell is provided with a second radiating block.

[0016] In one embodiment of the utility model, the side wall of the bottom shell is provided with a first threaded hole for installing a radiating fan and a second threaded hole for installing a tripod.

[0017] In one embodiment of the utility model, the outer surface of the bottom shell is provided with a radiating fin.

[0018] Compared with the prior art, the utility model has the advantages of:

[0019] In the above scheme of the application, firstly, the MIMO radar device applied to the W wave band comprises a bottom shell and an upper cover, the bottom shell and the upper cover are detachably connected, a containing cavity is enclosed between the bottom shell and the upper cover, an antenna plate, a ring-shaped wave-absorbing piece and a metal shielding plate are arranged in the containing cavity, a first supporting boss is arranged on the side wall of the bottom shell, the metal shielding plate is installed on the first supporting boss, the ring-shaped wave-absorbing piece is compressed between the metal shielding plate and the upper cover, and the antenna plate is connected with the metal shielding plate and located on the inner side of the ring-shaped wave-absorbing piece. With this structure, the upper cover, the ring-shaped wave-absorbing piece and the metal shielding plate can enclose a shielding cavity, the external electromagnetic waves can be absorbed by the ring-shaped wave-absorbing piece, thereby reducing the electromagnetic waves reflected back to the antenna plate, and further reducing the interference of the external electromagnetic signals on the antenna plate and improving the detection performance of the antenna plate; the antenna plate can be shielded and isolated by the metal shielding plate, the interference of the external electromagnetic signals on the antenna plate is reduced, and the detection performance of the antenna plate is further improved. Secondly, a plurality of groups of receiving antenna arrays and a group of transmitting antenna arrays are arranged on the side surface of the antenna plate facing the upper cover, each group of receiving antenna arrays comprises a plurality of receiving antenna units distributed along the length direction of the antenna plate in sequence, the transmitting antenna array comprises a plurality of transmitting antenna units distributed along the length direction of the antenna plate in sequence, and the spacing between two adjacent receiving antenna units is less than 1 / 5 of the spacing between two adjacent transmitting antenna units. With this structure, the electromagnetic waves can be transmitted by the plurality of transmitting antenna units, and the electromagnetic waves can be received by the plurality of receiving antenna units, so that the signal transmission performance of the antenna plate can be improved, and the detection performance of the antenna plate is further improved.

[0020] The utility model will be further explained in detail in connection with the drawings and examples. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 is the explosion of the radar device provided by the utility model embodiment Figure 1 ;

[0022] Figure 2 is the schematic view of the radar device provided by the utility model embodiment

[0023] Figure 3 is the explosion of the radar device provided by the utility model embodiment Figure 2 ;

[0024] Figure 4 is the sectional view of the radar device provided by the utility model embodiment

[0025] Figure 5 is the top view of the antenna plate in the utility model embodiment

[0026] Figure 6 is the side view of the antenna plate in the utility model embodiment

[0027] Figure 7is a schematic view of the front of the metal shielding plate in the embodiment of the utility model;

[0028] Figure 8 is a schematic view of the back of the metal shielding plate in the embodiment of the utility model;

[0029] Figure 9 is a schematic view of the bottom shell in the embodiment of the utility model;

[0030] Figure 10 is a top view of the bottom shell in the embodiment of the utility model.

[0031] Reference signs: 1-bottom shell, 2-upper cover, 3-antenna plate, 31-front plate part, 32-back plate part, 4-annular wave-absorbing part, 5-metal shielding plate, 6-receiving antenna array, 7-transmitting antenna array, 8-supporting column, 9-first heat dissipation block, 10-circuit board, 11-supporting block, 12-second heat dissipation block, 13-first threaded hole, 14-second threaded hole, 15-heat dissipation fin, 16-gigabit Ethernet interface, 17-power interface, 18-aeronautical interface, 19-first supporting boss, 20-second supporting boss. DETAILED DESCRIPTION

[0032] The utility model will be described in further detail in combination with specific embodiments, but the implementation mode of the utility model is not limited to this.

[0033] Please see Figures 1 to 10 The utility model embodiment provides a kind of MIMO radar device applied to W wave band, including bottom shell 1 and upper cover 2, bottom shell 1 and upper cover 2 are detachably connected, and the accommodation cavity is enclosed between bottom shell 1 and upper cover 2, antenna plate 3, annular wave-absorbing part 4 and metal shielding plate 5 are equipped in accommodation cavity, first supporting boss 19 is equipped on the side wall of bottom shell 1, metal shielding plate 5 is installed on first supporting boss 19, annular wave-absorbing part 4 is pressed between metal shielding plate 5 and upper cover 2, antenna plate 3 is connected with metal shielding plate 5 and located the inside of annular wave-absorbing part 4;The side surface of antenna plate 3 towards upper cover 2 is equipped with multiple receiving antenna arrays 6 and a transmitting antenna array 7, each receiving antenna array 6 includes multiple receiving antenna units that are sequentially distributed along the length direction of antenna plate 3, and the transmitting antenna array 7 includes multiple transmitting antenna units that are sequentially distributed along the length direction of antenna plate 3, the interval between adjacent two receiving antenna units is less than 1 / 5 of the interval between adjacent two transmitting antenna units.

[0034] In some embodiments of the present application, W wave band is a millimeter wave frequency band with a frequency range of 75GHz to 110GHz, which is widely used in vehicle-mounted radar.

[0035] In some embodiments of the present application, the MIMO (Multiple-Input Multiple-Output) radar device is a radar device that uses multiple transmitting antennas and receiving antennas to improve the performance of a wireless communication system. The multiple transmitting antenna units and the multiple receiving antenna units provided on the antenna board 3 in the present application can form a MIMO radar device.

[0036] In some embodiments of the present application, the bottom shell 1 and the upper cover 2 can be connected by screw connection, clamping or other connection structures.

[0037] In some embodiments of the present application, as shown in Figures 1 to 4 , Figure 9 and Figure 10 , the bottom shell 1 includes a bottom plate, a front side plate, a rear side plate, a left side plate, and a right side plate. The front side plate, the left side plate, the rear side plate, and the right side plate are sequentially connected and all connected to the bottom plate. The front side plate, the rear side plate, the left side plate, the right side plate, and the bottom plate collectively enclose a receiving groove with an opening facing upward. The upper cover 2 is a plate structure. The upper end of the bottom shell 1 is provided with a surrounding edge. The surrounding edge and the upper cover 2 are connected by screw fastening.

[0038] In some embodiments of the present application, as shown in Figure 1 , Figure 5 and Figure 6 , the receiving antenna array 6 is provided with two groups. Each group of the receiving antenna array 6 includes four receiving antenna units. The transmitting antenna array 7 includes twelve transmitting antenna units. The two groups of the receiving antenna array 6 are symmetrically distributed on both sides of the rear part of the antenna board 3. The transmitting antennas are distributed on the front part of the antenna.

[0039] In some embodiments of the present application, the ring-shaped wave-absorbing member 4 is a structure that can absorb and attenuate incident electromagnetic fields, convert their energy into heat, or weaken them through scattering, thereby reducing or eliminating radar wave reflection. In the present embodiment, the ring-shaped wave-absorbing member 4 is composed of a wave-absorbing agent and a substrate. The wave-absorbing agent can be carbon-based, iron-based, and ceramic-based, preferably carbon-based wave-absorbing materials such as graphene, graphite, carbon black, carbon fiber, or carbon nanotubes, etc. The substrate is usually plastic particles, rubber particles, sponge, etc. Specifically, the wave-absorbing member in the present application can be the wave-absorbing member disclosed in the Chinese Utility Model Patent with the publication number CN219891397U and the name Radar Structure.

[0040] In some embodiments of the present application, the ring-shaped wave-absorbing member 4 can be a high-frequency wave-absorbing cotton layer. The wave-absorbing cotton is continuously laid along the periphery of the antenna board 3 to form a closed electromagnetic isolation band covering the frequency range containing the operating frequency band of the antenna. The density of the wave-absorbing cotton outside is lower than that inside, and the density of the wave-absorbing cotton gradually increases from the outside to the inside. In this way, the density inside the wave-absorbing cotton can be distributed in a gradient, thereby realizing the impedance matching of the incident electromagnetic wave and reducing the reflectivity.

[0041] In some embodiments of the present application, the metal shielding plate 5 can be an iron plate, a copper plate, etc.

[0042] In some embodiments of the present application, as shown in Figure 9 and Figure 10 , the first support boss 19 is used to support the metal shielding plate 5, the first support boss 19 includes a long boss arranged on the inner wall of the front side plate and the rear side plate of the bottom shell 1, and three short bosses arranged on the inner wall of the left side plate and the right side plate of the bottom shell 1, the length of the long boss is greater than the length of the short boss, the height of the long boss and the short boss is equal, and they are located on the same horizontal plane.

[0043] In some embodiments of the present application, screw holes are arranged on the first support boss 19, and the metal shielding plate 5 and the first support boss 19 are connected by screw fastening.

[0044] In some embodiments of the present application, as shown in Figure 1 , Figure 2 and Figure 3 , the bottom shell 1 is further provided with a gigabit Ethernet interface 16, a power supply interface 17 and an aviation interface 18, the gigabit Ethernet interface 16 can be connected with an external computer through Ethernet, and the transmission rate of signals can be improved through the gigabit Ethernet interface 16. The power supply interface 17 adopts a four-core aviation plug interface, and the level standard is 12V DC power supply. The aviation interface 18 is used to connect with an external debugging device, so as to facilitate debugging and updating of device firmware.

[0045] In the above scheme of the application, first, the MIMO radar device applied to the W wave band comprises a bottom shell 1 and an upper cover 2, the bottom shell 1 and the upper cover 2 are detachably connected, a containing cavity is formed between the bottom shell 1 and the upper cover 2, an antenna plate 3, an annular wave-absorbing part 4 and a metal shielding plate 5 are arranged in the containing cavity, a first support boss 19 is arranged on the side wall of the bottom shell 1, the metal shielding plate 5 is installed on the first support boss 19, the annular wave-absorbing part 4 is compressed between the metal shielding plate 5 and the upper cover 2, and the antenna plate 3 is connected with the metal shielding plate 5 and located on the inner side of the annular wave-absorbing part 4. With this structure, the upper cover 2, the annular wave-absorbing part 4 and the metal shielding plate 5 can form a shielding cavity, the external electromagnetic waves can be absorbed by the annular wave-absorbing part 4, thereby reducing the electromagnetic waves reflected back to the antenna plate 3, further reducing the interference of the external electromagnetic signals on the antenna plate 3 and improving the detection performance of the antenna plate 3; the antenna plate 3 can be shielded and isolated by the metal shielding plate 5, the interference of the external electromagnetic signals on the antenna plate 3 is reduced, and the detection performance of the antenna plate 3 is further improved. Secondly, a plurality of groups of receiving antenna arrays 6 and a group of transmitting antenna arrays 7 are arranged on the side surface of the antenna plate 3 facing the upper cover 2, each group of receiving antenna arrays 6 comprises a plurality of receiving antenna units distributed along the length direction of the antenna plate 3 in sequence, the transmitting antenna array 7 comprises a plurality of transmitting antenna units distributed along the length direction of the antenna plate 3 in sequence, and the interval between two adjacent receiving antenna units is less than 1 / 5 of the interval between two adjacent transmitting antenna units. With this structure, the signal transmission performance of the antenna plate 3 can be improved by using a plurality of transmitting antenna units to transmit electromagnetic waves and a plurality of receiving antenna units to receive electromagnetic waves, and the detection performance of the antenna plate 3 is further improved. In addition, the plurality of groups of receiving antenna arrays 6 and the group of transmitting antenna arrays 7 can expand the virtual aperture and improve the resolution of the radar.

[0046] It can be understood that when the interval between two adjacent receiving antenna units is less than 1 / 5 of the interval between two adjacent transmitting antenna units, the density of the plurality of receiving antenna units is greater than the density of the plurality of transmitting antenna units, the plurality of receiving antenna units can be densely distributed, so that the grating lobes can be suppressed and the anti-aliasing capability of the radar can be improved; and the plurality of transmitting antenna units can be sparsely distributed, so that the hardware cost can be reduced.

[0047] In some embodiments of the application, as shown in Figure 1 , Figure 3 and Figure 7 , a support column 8 is arranged on the side surface of the metal shielding plate 5 facing the antenna plate 3, one end of the support column 8 is connected with the metal shielding plate 5, the other end of the support column 8 is connected with the antenna plate 3, the antenna plate 3 and the metal shielding plate 5 are parallel to each other and a heat dissipation gap exists between them. With this structure, the antenna plate 3 and the metal shielding plate 5 are supported by the support column 8, so that a heat dissipation gap can be formed between the antenna plate 3 and the metal shielding plate 5, and the heat dissipation capacity of the antenna plate 3 is improved.

[0048] In some embodiments of the present application, a screw connection is adopted between one end of the support column 8 and the metal shielding plate 5, and a screw connection is adopted between the other end of the support column 8 and the antenna plate 3.

[0049] In some embodiments of the present application, a plurality of support columns 8 are provided, and the plurality of support columns 8 are symmetrically arranged on both sides of the metal shielding plate 5. With this structure, the stability of the connection between the antenna plate 3 and the metal shielding plate 5 can be improved.

[0050] In some embodiments of the present application, as shown in Figure 7 and Figure 8 , the antenna plate 3 is provided with 16 support columns 8, of which 6 support columns 8 are arranged on the left and right sides of the metal shielding plate 5 respectively, and 4 support columns 8 are arranged at the middle position of the metal shielding plate 5.

[0051] In some embodiments of the present application, the support column 8 is located on the inner side of the annular wave-absorbing member 4, and the annular wave-absorbing member 4 can be limited by the support column 8, thereby improving the stability of the installation of the annular wave-absorbing member 4.

[0052] In some embodiments of the present application, as shown in Figure 7 and Figure 8 , the metal shielding plate 5 is further provided with a first heat dissipation block 9 on the side surface facing the antenna plate 3, and the upper surface of the first heat dissipation block 9 is in contact with the lower surface of the antenna plate 3. With this structure, the heat dissipation capacity of the antenna plate 3 can be enhanced by providing the first heat dissipation block 9, thereby improving the heat dissipation performance of the radar.

[0053] In some embodiments of the present application, the first heat dissipation block 9 is provided with a plurality of.

[0054] In some embodiments of the present application, as shown in Figure 5 and Figure 6 , the antenna plate 3 comprises a front plate part 31 and a rear plate part 32, the distance between the rear plate part 32 and the upper cover 2 is less than the distance between the front plate part 31 and the upper cover 2, and a plurality of groups of receiving antenna arrays 6 are arranged on the rear plate part 32, and a group of transmitting antenna arrays 7 are arranged on the front plate part 31. With this structure, the receiving antenna arrays 6 and the transmitting antenna arrays 7 are distributed on horizontal planes at different heights, which can reduce the electromagnetic coupling of the receiving antenna arrays 6 and the transmitting antenna arrays 7 in the vertical direction, and improve the signal-to-noise ratio of the radar.

[0055] In some embodiments of the present application, as shown in Figure 1 , Figure 3 , Figure 4 , Figure 9 and Figure 10As shown, the accommodating cavity is further provided with a circuit board 10, the circuit board 10 is arranged between the metal shielding plate 5 and the bottom wall of the bottom shell 1, the side wall of the bottom shell 1 is provided with a second supporting boss 20, the distance between the second supporting boss 20 and the upper cover 2 is greater than the distance between the first supporting boss 19 and the upper cover 2, and the circuit board 10 is installed on the second supporting boss 20; the metal shielding plate 5 is provided with a supporting block 11 on the side surface away from the antenna plate 3, one end of the supporting block 11 is connected with the metal shielding plate 5, the other end abuts against the upper surface of the circuit board 10, and there is a gap between the metal shielding plate 5 and the circuit board 10. By adopting the structure, the circuit board 10 can be supported by the second supporting boss 20, so that the stability of the circuit board 10 can be improved, the supporting block 11 is arranged between the metal shielding plate 5 and the circuit board 10, so that the heat dissipation gap between the metal shielding plate 5 and the circuit board 10 can be ensured, and the heat dissipation performance of the circuit board 10 can be improved.

[0056] In some embodiments of the present application, the model of the circuit board 10 can be xilinx Zynq UltraScal e+MPSoC development board.

[0057] In some embodiments of the present application, the second supporting boss 20 can be arranged on the front side of the first supporting boss 19, the second supporting boss 20 is provided with a threaded hole, and the circuit board 10 and the threaded hole of the second supporting boss 20 are connected by a screw.

[0058] In some embodiments of the present application, the second supporting boss 20 is provided with a plurality of second supporting bosses 20, and there is a spacing between adjacent two second supporting bosses 20. In this way, the circuit board 10 can be supported by the plurality of second supporting bosses 20, the heat dissipation space between the circuit board 10 and the bottom wall of the bottom shell 1 can be increased, and the cost can be reduced.

[0059] In some embodiments of the present application, as shown in Figure 8 two supporting blocks 11 are arranged on both sides of the metal shielding plate 5 along the width direction of the metal shielding plate 5; and one side of the supporting block 11 away from the metal shielding plate 5 is in a sawtooth-shaped protruding structure. By adopting the structure, the stability of the metal shielding plate 5 installed on the circuit board 10 can be improved by supporting the two supporting blocks 11. When one side of the supporting block away from the metal shielding plate 5 is in a sawtooth-shaped protruding structure, the slots in the sawtooth-shaped protruding structure can be used for heat dissipation to improve the heat dissipation performance of the circuit board 10, and the production cost can be reduced.

[0060] In some embodiments of the present application, the sawtooth-shaped protruding structure is composed of a plurality of protrusions arranged in sequence along the length direction of the metal shielding plate 5, and a groove is formed between adjacent two protrusions.

[0061] In some embodiments of the present application, as shown in Figure 9 and Figure 10As shown, the bottom wall of the bottom shell 1 is provided with a second heat dissipation block 12. With this structure, heat conduction through the second heat dissipation block 12 can further improve the heat dissipation performance of the circuit board 10.

[0062] In some embodiments of the present application, as shown in Figure 1 and Figure 2 As shown, the side wall of the bottom shell 1 is provided with a first threaded hole 13 for mounting a heat dissipation fan and a second threaded hole 14 for mounting a tripod. With this structure, it is convenient to mount a heat dissipation fan inside the bottom shell 1, and it is convenient to connect the radar and the external tripod.

[0063] In some embodiments of the present application, the bottom shell 1 is further provided with a heat dissipation fan, and the heat dissipation fan and the first threaded hole 13 of the bottom shell 1 are connected by a screw. In this way, heat dissipation through the heat dissipation fan can further improve the heat dissipation performance of the radar.

[0064] In some embodiments of the present application, the outer surface of the bottom shell 1 is provided with a heat dissipation fin 15. With this structure, heat dissipation through the heat dissipation fin 15 can further improve the heat dissipation performance of the radar.

[0065] In some embodiments of the present application, the heat dissipation fin 15 is arranged along the width direction of the bottom shell 1, and the length of the heat dissipation fin 15 is equal to the width of the bottom shell 1. The heat dissipation fin 15 is provided with a plurality of heat dissipation fins 15, and the plurality of heat dissipation fins 15 are sequentially distributed along the length direction of the bottom shell 1, and there is a heat dissipation gap between the adjacent two heat dissipation fins 15.

[0066] In the description of the present application, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise" and the like are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements indicated must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0067] In addition, the terms "first" and "second" are only for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" can explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "multiple" is two or more, unless otherwise specifically limited.

[0068] In the utility model, unless another definite provision and limitation, the term "mount", "link", "connect", "fix" and so on term should do broad sense understanding, for example, can be fixed connection, also can be detachable connection, or be integrated;Can be mechanical connection, also can be electric connection;Can be direct connection, also can indirectly connect through intermediate medium, can be two element inside's intercommunication or two element's mutual action relation. For ordinary skilled person in the art, can understand the specific meaning of above-mentioned term in the utility model according to specific circumstances.

[0069] The above is further detailed description of the utility model in combination with specific preferred embodiments, and the specific implementation of the utility model cannot be limited to these descriptions. For ordinary skilled person in the art to which the utility model belongs, without departing from the concept of the utility model, a number of simple deductions or substitutions can also be made, which should be considered as belonging to the protection scope of the utility model.

Claims

1. A MIMO radar device for the W-band, comprising a bottom shell and a top cover, wherein the bottom shell and the top cover are detachably connected, and a receiving cavity is formed between the bottom shell and the top cover, characterized in that, The cavity contains an antenna plate, an annular absorbing element, and a metal shielding plate. The side wall of the bottom shell has a first support protrusion. The metal shielding plate is installed on the first support protrusion. The annular absorbing element is pressed between the metal shielding plate and the top cover. The antenna plate is connected to the metal shielding plate and is located inside the annular absorbing element. The antenna plate has multiple sets of receiving antenna arrays and one set of transmitting antenna arrays on the side surface facing the upper cover. Each set of receiving antenna arrays includes multiple receiving antenna elements distributed sequentially along the length direction of the antenna plate. The transmitting antenna array includes multiple transmitting antenna elements distributed sequentially along the length direction of the antenna plate. The spacing between two adjacent receiving antenna elements is less than 1 / 5 of the spacing between two adjacent transmitting antenna elements.

2. The MIMO radar device applied to the W-band according to claim 1, characterized in that, The metal shielding plate has a support column on one side surface facing the antenna plate. One end of the support column is connected to the metal shielding plate, and the other end of the support column is connected to the antenna plate. The antenna plate and the metal shielding plate are parallel to each other and there is a heat dissipation gap between them.

3. The MIMO radar device applied to the W-band according to claim 2, characterized in that, The support columns are provided in multiple quantities, and the multiple support columns are symmetrically arranged on both sides of the metal shielding plate.

4. The MIMO radar device applied to the W-band according to claim 2, characterized in that, A first heat dissipation block is also provided on the side surface of the metal shielding plate facing the antenna plate, and the upper surface of the first heat dissipation block is in contact with the lower surface of the antenna plate.

5. The MIMO radar device applied to the W-band according to claim 1, characterized in that, The antenna board includes a front plate and a rear plate. The distance between the rear plate and the top cover is smaller than the distance between the front plate and the top cover. Multiple sets of receiving antenna arrays are disposed on the rear plate, and one set of transmitting antenna arrays is disposed on the front plate.

6. The MIMO radar device applied to the W-band according to claim 1, characterized in that, The cavity is also provided with a circuit board, which is disposed between the metal shielding plate and the bottom wall of the bottom shell. The side wall of the bottom shell is provided with a second support protrusion. The distance between the second support protrusion and the top cover is greater than the distance between the first support protrusion and the top cover. The circuit board is mounted on the second support protrusion. A support block is located on the side of the metal shielding plate away from the antenna plate. One end of the support block is connected to the metal shielding plate, and the other end abuts against the upper surface of the circuit board. There is a gap between the metal shielding plate and the circuit board.

7. The MIMO radar device applied to the W-band according to claim 6, characterized in that, Two support blocks are provided, and the two support blocks are arranged on both sides of the metal shielding plate along the width direction of the metal shielding plate; The side of the support block furthest from the metal shielding plate has a serrated protrusion structure.

8. The MIMO radar device applied to the W-band according to claim 6, characterized in that, A second heat dissipation block is provided on the bottom wall of the bottom shell.

9. The MIMO radar device applied to the W-band according to claim 1, characterized in that, The side wall of the bottom shell is provided with a first threaded hole for installing a cooling fan and a second threaded hole for installing a tripod.

10. The MIMO radar device applied to the W-band according to claim 1, characterized in that, The outer surface of the bottom shell is provided with heat dissipation fins.

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