Modified Bayesian Optimization Algorithm for Sparse Linear Antenna Design

The design and analysis of reflectarray antennas (RAs) often applies the local periodic assumption, whereby all elements are assumed to be identical. However, elements in a RA design differ geometrically from their neighbors, which can result in undesired perturbations of the reflectarray antenna pattern. In this paper, we explore the use of parasitically loaded elements in the reflectarray unit cell to compensate for this effect. An optimization scheme is integrated in the design process to improve the antenna pattern. As a proof of concept, the optimization of a plane-wave re-direction surface is presented

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A Novel Hybrid IWO/WDO Algorithm for Interference Minimization of Uniformly Excited Linear Sparse Array by Position-Only Control

Mahto¹,

Choubey²

2016

Antennas Wirel. Propag. Lett.

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This letter introduces a novel, fast, efficient and global optimization algorithm called hybrid invasive weed optimization and wind driven optimization (IWO/WDO). The proposed algorithm is implemented to synthesize the uniformly excited ( ) linear sparse array pattern having a minimum side lobe level (SLL), and null control with constraint on beam width to minimize the interference effect by optimizing the element position-only. Three examples of (N=10, 28, and 32) element linear array synthesis are considered to illustrate the efficacy of the proposed algorithm. The results are compared with those obtained by IWO, WDO, PSO, CLPSO, DE and BBO algorithms. Simulation studies demonstrate that this algorithm achieves minimum SLL of -23.5 dB, -13.22 dB, and -19.7 dB as compared to -17.35 dB, -10.5 dB and -15.70 dB obtained by the IWO algorithm for 10, 28, and 32 elements array respectively. Also, it yields a null depth level (NDL) larger than -84.5 dB in all cases. The learning characteristics show a faster convergence at around 100 iterations. The simulation results demonstrate the improved performance of hybrid IWO/WDO algorithm compared to other six algorithms in terms of null control, minimum SLL, beam width control and the rate of convergence. Index Terms-Array pattern synthesis, linear array, invasive weed optimization (IWO), wind driven optimization (WDO), electromagnetic interference, hybrid IWO/WDO.

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Modified Bayesian Optimization Algorithm for Sparse Linear Antenna Design

Cited by 4 publications

References 28 publications

Comparison of Binary Evolutionary Algorithms for Optimization of Thinned Array Antennas

Comparison of Binary Evolutionary Algorithms for Optimization of Thinned Array Antennas

Design and optimization of a multi-resonant reflectarray element

A Novel Hybrid IWO/WDO Algorithm for Interference Minimization of Uniformly Excited Linear Sparse Array by Position-Only Control

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