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Reflectarray antennas can be considered as quasi-periodic structures in which similar elements locate on periodic grids. In this paper, we compare the reflection phase of elements in the array between the designed value and the practical one. This error is mainly due to the assumption of periodicity in computing the designed element reflection phase. To study this error, we developed a method to obtain...
Reflectarray antennas have been widely used in communications and national defense because of their remarkable advantages such as high gain, low loss, low profile, and etc. In the design of reflectarray antennas, the relation between the reflection phase of every element and its dimensions is usually computed through element simulation with infinite periodic boundary conditions. However, this assumption...
In order to enforce particles to search inside the solution space of interest during the optimization procedure, various boundary conditions are currently used in particle swarm optimization (PSO) algorithms. The performances, however, vary considerably with the dimensionality of the problem and the location of the global optimum in the solution space. In this paper, different boundary conditions...
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