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CN-224204351-U - 8 Send out 8 receipts double chip 4D millimeter wave radar antenna array

CN224204351UCN 224204351 UCN224204351 UCN 224204351UCN-224204351-U

Abstract

The utility model relates to the technical field of millimeter wave radars, in particular to an 8-transmission 8-reception dual-chip 4D millimeter wave radar antenna array, which comprises 8 transmitting antennas and 8 receiving antennas, wherein the transmitting antennas and the receiving antennas are arranged in the horizontal direction and the pitching direction in a physical space; according to the utility model, 8 transmitting antennas and 8 receiving antennas are arranged, the transmitting antennas and the receiving antennas are distributed in the horizontal direction and the pitching direction in the physical space according to a certain rule, and the array element coordinates of the transmitting antennas and the receiving antennas are not simply and uniformly distributed, but are differentially distributed according to a preset optimization algorithm, so that the equivalent array synthesized by the virtual channel has good side lobe performance and high angular resolution.

Inventors

  • ZHANG XIN
  • WANG JUNTAO
  • MA JIXIANG
  • LI GANG
  • LI XUYANG
  • WANG KAI

Assignees

  • 赛恩领动(上海)智能科技有限公司

Dates

Publication Date
20260505
Application Date
20250704

Claims (7)

  1. 1. The utility model provides a 8 send 8 receipts double chip 4D millimeter wave radar antenna array which characterized in that, includes 8 transmitting antenna and 8 receiving antennas, wherein: The transmitting antenna and the receiving antenna are arranged in the horizontal direction and the pitching direction in the physical space, the array element positions of the transmitting antenna and the receiving antenna are unevenly distributed in the horizontal direction and the pitching direction, and the antenna array is synthesized into an equivalent array with 18 array elements and 56 half-wavelength apertures and an equivalent array with 13 array elements and 38 half-wavelength apertures in the horizontal direction through a virtual channel technology; the 8 transmitting antennas and the 8 receiving antennas are divided into two groups, each group comprises 4 transmitting antennas and 4 receiving antennas, and the two groups of antennas are respectively connected to two independent radio frequency chips.
  2. 2. The 8-transmit 8-receive dual-chip 4D millimeter wave radar antenna array of claim 1, wherein the spatial coordinate relationship of the array elements in the receiving antenna is: The coordinates in the horizontal direction are the sum of 0, 4 half-wavelengths, 18 half-wavelengths, 24 half-wavelengths, 29 half-wavelengths, 0 and 18 half-wavelengths and the translation distance of the receiving antenna in the horizontal direction; the coordinates in the pitch direction are the sum of 0,11.5 half-wavelengths, 19.5 half-wavelengths, 11.5 half-wavelengths, and the translational distances of the receiving antenna in the pitch direction, respectively.
  3. 3. The 8-transmit 8-receive dual-chip 4D millimeter wave radar antenna array of claim 1 or 2, wherein the spatial coordinate relationship of the array elements in the transmitting antenna is: The coordinates in the horizontal direction are the sum of the translation distances of 5.5 half-wavelengths, 9.5 half-wavelengths, 20.5 half-wavelengths, 32.5 half-wavelengths, 14.5 half-wavelengths and 14.5 half-wavelengths respectively and the transmitting antenna in the horizontal direction; the coordinates in the pitching direction are the sum of 19.5 half-wavelengths, 9.5 half-wavelengths, 1 half-wavelength, 5 half-wavelengths, and 14.5 half-wavelengths, respectively, and the translational distances of the transmitting antenna in the pitching direction.
  4. 4. The array of 8-transmit 8-receive dual-chip 4D millimeter wave radar antenna of claim 3, wherein the array element pitch of the equivalent array in the horizontal direction is 4 half-wavelengths, 7 half-wavelengths, 3 half-wavelengths, 1 half-wavelength, 3 half-wavelengths, 2 half-wavelengths, 3 half-wavelengths, 1 half-wavelength, 2 half-wavelengths, 6 half-wavelengths, 5 half-wavelengths, 1 half-wavelength, 6 half-wavelengths, 5 half-wavelengths; The array element spacing of the equivalent array in the pitching direction is 4 half-wavelengths, 4.5 half-wavelengths, 3 half-wavelengths, 2 half-wavelengths, 3 half-wavelengths, 1 half-wavelength, 0.5 half-wavelengths, 5 half-wavelengths, 3 half-wavelengths, 2 half-wavelengths and 8 half-wavelengths.
  5. 5. The 8-transmit 8-receive dual chip 4D millimeter wave radar antenna array of claim 4, wherein said equivalent array in the horizontal direction forms a linear array having an aperture of 56 half wavelengths with a theoretical resolution of 2.04 degrees; The equivalent array in the pitching direction forms a linear array with an aperture of 38 half wavelengths, and the theoretical resolution of the linear array is 3.01 degrees.
  6. 6. The 8-transmit 8-receive dual-chip 4D millimeter wave radar antenna array of claim 1, wherein a set of six array element pitch arrays are respectively disposed on two sides of the equivalent array in the pitch direction.
  7. 7. The 8-transmit 8-receive dual chip 4D millimeter wave radar antenna array of claim 1, wherein the left 4 transmit antennas and the 4 receive antennas, and the right 4 transmit antennas and the 4 receive antennas are each connected to two separate radio frequency chips.

Description

8 Send out 8 receipts double chip 4D millimeter wave radar antenna array Technical Field The utility model relates to the technical field of millimeter wave radars, in particular to an 8-transmission 8-reception dual-chip 4D millimeter wave radar antenna array. Background The millimeter wave radar has become a core sensor in the fields of automatic driving, intelligent traffic, unmanned aerial vehicle obstacle avoidance and the like by virtue of high-precision, strong anti-interference capability and all-weather working characteristics, and the 77GHz frequency band (76-81 GHz) becomes a mainstream choice of vehicle-mounted radars (such as adaptive cruise ACC and automatic emergency brake AEB) due to the advantages of shorter wavelength (about 3.9 mm), wide bandwidth (up to 4 GHz) and high resolution. . The antenna layout design is the core of the 4D millimeter wave radar design, whether the antenna layout design is reasonable or not directly determines the advantages and disadvantages of the millimeter wave radar performance, on one hand, along with the increasing of sensors on vehicles, the installation space reserved for the millimeter wave radar on a real vehicle is also smaller and smaller, on the other hand, the waveguide antenna is larger in size relative to the microstrip antenna, so that the reasonable antenna layout is designed in a limited size space, the angle measurement performance of the antenna layout can be met, meanwhile, the interference of a bumper on the radar performance is reduced, the reasonable arrangement of 16 waveguide antennas in the layout can be ensured, the wiring without interference can be realized, and the antenna layout design is the key point of the waveguide antenna layout design. In the prior art, for example, the Chinese patent with the publication number of CN216563514U and the patent name of antenna array and millimeter wave radar specifically discloses a novel antenna array which comprises three transmitting antennas and four receiving antennas, wherein the three transmitting antennas and the four receiving antennas are all single-row antennas, the three transmitting antennas are arranged on the same plane and keep the heights of the three transmitting antennas consistent, the four receiving antennas are arranged on the same plane and keep the heights of the four receiving antennas consistent, the mutual spacing of the three transmitting antennas and the mutual spacing of the four receiving antennas are integer multiples of L, L is 0.5 times of the vacuum wavelength of the working frequency band of the vehicle-mounted radar, and the mutual spacing of the three transmitting antennas is larger than the mutual spacing of the four receiving antennas The scheme can solve the problem that the horizontal view angle of the vehicle-mounted radar antenna and the angular resolution of the vehicle-mounted radar antenna cannot be considered. However, in the practical use process, the above-mentioned scheme adopts equidistant and equidistant layout mode to arrange, and this kind of overall dimension can lead to the whole antenna plate size to be too big, and then causes the complicated, sidelobe control of routing and scheduling problem. For this reason, an 8-transmit 8-receive dual-chip 4D millimeter wave radar antenna array is proposed to solve the above-mentioned problems. Disclosure of utility model Technical problem to be solved Aiming at the defects in the prior art, the utility model provides the 8-transmission 8-reception double-chip 4D millimeter wave radar antenna array, which can effectively solve the problem of unreasonable antenna array design of the millimeter wave radar in the prior art. Technical proposal In order to achieve the above purpose, the utility model is realized by the following technical scheme: the utility model provides an 8-transmission 8-reception double-chip 4D millimeter wave radar antenna array, which comprises 8 transmitting antennas and 8 receiving antennas, wherein the transmitting antennas and the receiving antennas are arranged in the horizontal direction and the pitching direction in a physical space, the array element positions of the transmitting antennas and the receiving antennas are unevenly distributed in the horizontal direction and the pitching direction, and the antenna array is synthesized into an equivalent array with 18 array elements and 56 half-wavelength apertures and an equivalent array with 13 array elements and 38 half-wavelength apertures in the horizontal direction through a virtual channel technology; the 8 transmitting antennas and the 8 receiving antennas are divided into two groups, each group comprises 4 transmitting antennas and 4 receiving antennas, and the two groups of antennas are respectively connected to two independent radio frequency chips. Further, the spatial coordinate relationship of the array elements in the receiving antenna is: The coordinates in the horizontal direction are the sum of 0, 4 half-wav