An antenna array

By introducing position vector convolution and Fourier transform technology into the automotive millimeter wave radar antenna array, the main matrix vector is formed, and the problem of improving angle resolution but high side lobes in the existing technology is solved, achieving the effect of high angle resolution and size target recognition, while reducing the cost and PCB area.

CN113675590BActive Publication Date: 2025-06-13何瑞
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Patent Information

Application Number
CN202010403914.8
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2020-05-13
Publication Date
2025-06-13
Estimated Expiration
2040-05-13

AI Technical Summary

Technical Problem

While improving the angular resolution, the existing automotive millimeter-wave radar antenna arrays have introduced targets with high side lobes that cannot effectively distinguish the angular dimensions.

Method used

An antenna array structure is proposed, through convolution of position vectors and Fourier transform, the main matrix vector is formed, and the combination of sub-arrays and Chebishev window processing is improved, thereby improving the angular resolution and target recognition ability.

Benefits of technology

High angle resolution and the ability to effectively distinguish size targets are achieved while reducing PCB footprint and cost.

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Patent Text Reader

Abstract

The present invention discloses an antenna array, which includes a transmitting antenna array composed of m antenna elements and a receiving antenna array composed of n antenna elements. The transmitting and receiving antenna arrays form a virtual antenna array. The length N of the main array vector of the virtual antenna array is greater than the number M of non-zero elements of the main array vector plus 4. The main side lobe ratio of the array response curve of the main array vector in any angular direction within the angular range of -90° to 90° is above 2.5 dB. All sub-array spacings in the sub-array vectors of the virtual antenna array are equal, and the number of array elements in the sub-array is ≥4. The antenna array of the present invention can not only improve the angular resolution, but also distinguish large and small targets in the angular dimension.
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