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Design of Concentric Circular Antenna Array using Biogeography Based Optimization

Biogeography based optimization (BBO) is a novel stochastic force based on the science of biogeography. Biogeography is the schoolwork of geographical allotment of biological organisms. BBO make use of migration operator to share information between the problem solutions. The problem solutions are called as habitats and sharing of features is called migration. In this paper, BBO algorithm is developed to optimize the current excitations of concentric circular antenna arrays (CCAA). CCAA has several interesting features that make it crucial in mobile and communication applications. In this paper, a uniform arrangement of elements where the inter-element spacing is kept half a wavelength has been considered. The goal of the optimization is to reduce the side lobe levels and the primary lobe beam width as much as possible.