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2023-12-03
Frequency Diversity Arc Array with Angular Broadening Null Steering for Sidelobe Suppression
By
Progress In Electromagnetics Research C, Vol. 139, 59-66, 2024
Abstract
The structure of the frequency diversity arc array (FDAA) is a circular arc, which can achieve fast scanning in all directions and large viewing angles. By selecting the appropriate array elements for FDAA to form an effective working array and designing the symmetrical logarithmic frequency offset, a more aggregated point-like beam pattern is obtained. However, due to the structural characteristics of FDAA, the anti-density weighting phenomenon is generated, which limits the application of FDAA in radar system for target recognition and tracking. In order to solve the problem of high sidelobe of FDAA caused by inverse density weighting, a method of FDAA with angle widening null guidance for sidelobe suppression is proposed in this paper. The linear constraint minimum variance (LCMV) criterion is used to set zero points at a fixed position in the direction of interference, so that the interference is in a null with a certain width. Through Matlab simulation, it is verified that this method has a certain effect on suppressing FDAA sidelobe interference.
Citation
Ying Tian, Wei Xu, Pingping Huang, Weixian Tan, and Yaolong Qi, "Frequency Diversity Arc Array with Angular Broadening Null Steering for Sidelobe Suppression," Progress In Electromagnetics Research C, Vol. 139, 59-66, 2024.
doi:10.2528/PIERC23082402
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