Abstract
Radar image can provide an important basis for target recognition, which has been a hot area of radar technologies. In vortex electromagnetic radar imaging, it is necessary to transmit multi-mode vortex electromagnetic wave, but pure multi-mode vortex electromagnetic wave is difficult to obtain. Inspired by the generation of vortex electromagnetic waves, a rotating antenna is used to achieve high resolution two-dimensional radar imaging in this paper. The azimuth angle of the target in the range of radar beam can be reconstructed by using the Doppler effect generated by the rotation of the antenna when the radar transmits the linear frequency modulation (LFM) signal, and then the high resolution two-dimensional image of the target can be obtained by combining the one-dimensional range image obtained by the dechirp operation. Compared with the existing algorithms, the proposed algorithm has lower requirements on radar performance, and can generate two-dimensional image of the target under staring condition without transmitting complex signals. Simulation results show that the algorithm is effective and robust.
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