Vortex electromagnetic wave three-dimensional imaging method based on uniform and symmetrical concentric ring array

Abstract

The invention provides a vortex electromagnetic wave three-dimensional imaging method based on a uniform and symmetrical concentric ring array, and the method specifically comprises the following steps: S1, constructing a uniform concentric ring antenna array, s2, obtaining azimuth angle information and pitch angle information of the radar target under the spherical coordinate system; S3, constructing a uniform concentric ring antenna array-average price linear antenna array mixed array, further optimizing the uniform concentric ring antenna array into a uniform symmetric concentric ring antenna array, and adopting a backward projection algorithm to obtain a uniform symmetric concentric ring antenna array; obtaining distance and azimuth information [x, y] of the radar target in a rectangular coordinate system; and S4, performing association processing on the obtained two-dimensional imaging result of the radar target to obtain an accurate three-dimensional imaging result of the target. The array elements can form a uniform linear array for observing a radar target in space, the array structure of the uniform and symmetrical concentric circular ring array is further optimized by combining and utilizing the characteristics of a backward projection algorithm, and the antenna complexity and the total number of the array elements are effectively reduced.

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