Abstract
Pattern synthesis of non-uniform elliptical antenna arrays is presented in this paper. Only the element positions of the antenna arrays are optimized by the combination of differential evolution (DE) and invasive weed optimization (IWO) to reduce the peak side lobe level (PSLL) of the radiation pattern. In order to avoid the overlap of the array elements, the minimum spacing of the adjacent elements is constrained. Also, the beam width of the radiation pattern can be constrained effectively. Three elliptical antenna arrays that have 8, 12, and 20 elements are investigated. The synthesis results show that the introduced method can present a good side lobe reduction for the radiation pattern. Compared with other optimization methods, the method proposed in this paper can obtain better performance.
Highlights
Designs of antennas have been paid more attention in the last few years [1–22]
The purpose of this paper is to reduce the peak side lobe level of the radiation pattern by optimizing the positions of array elements that fulfil the minimum space constraint
The analysis shows that the proposed method is useful and effective to solve the design of non-uniform elliptical antenna arrays
Summary
Designs of antennas have been paid more attention in the last few years [1–22]. pattern synthesis of antenna arrays has become a traditional problem [6–20]. Much attention has been paid to the position-only synthesis of uniformly excited antenna arrays [6,7,8,9,10,11,12,13,14]. One is thinned array [6,7,8,9,10], which is to delete some array elements from a uniform array These kinds of arrays can constrain the spacing of the adjacent elements. In the design of sparse antenna arrays, it is hard to constrain the size of the array aperture, number of the array elements, and the minimum spacing of adjacent elements at the same time
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