A null-filling antenna for automotive radar is investigated using the genetic algorithm. The single column of the proposed antenna consists of four gap-coupled antenna elements and 14 direct-coupled antenna elements. The radiating elements are inclined 45∘from the feedline. The proposed antenna has 19.67 dBi gain with a-20.19-dB sidelobe level in the elevation and a-25.08-dB sidelobe level in the azimuth direction. The blind zone is reduced from 19.03 to 2.38 m using the proposed antenna for sensing the obstacle. The proposed antenna is a good solution for both short- and long-range automotive radar.
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Shin et al. (2014) studied this question.
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