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PHASE-ONLY NULLING WITH LIMITED NUMBER OF CONTROLLABLE ELEMENTS

By A. J. Abdulqader, J. R. Mohammed, and R. H. Thaher

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Abstract:
In this paper, the required array patterns with controlled nulls are obtained by optimizing only the excitation phases of a small number of elements on both sides of the array. A genetic algorithm is used to appropriately find which elements of the array to be optimized and also to find the required number of the excitation phases. The performance of the proposed phase-only method is compared with some other exciting methods, and it is found to be competitive, fulfill all the desired radiation characteristics, and represent a good solution for interference mitigation. Moreover, the proposed phase-only array is designed and validated under realistic electromagnetic effects using CST full wave modeling. Experimental results are found in a good agreement with the theoretical ones and show realistic array patterns with accurate nulls.

Citation:
A. J. Abdulqader, J. R. Mohammed, and R. H. Thaher, "Phase-Only Nulling with Limited Number of Controllable Elements," Progress In Electromagnetics Research C, Vol. 99, 167-178, 2020.
doi:10.2528/PIERC20010203

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