Optimization of an Offset Reflector Antenna Using Genetic Algorithms

Abstract

Abstract-This paper presents the application of genetic algorithms in the optimization of an offset reflector antenna. The antenna shape is designed in order to obtain a uniform radiation pattern on the Brazilian territory. Modified genetic operators are proposed with the aim to increase the efficiency of the real coded genetic algorithms used here.

Real Coded Genetic Algorithm for Jiles–Atherton Model Parameters Identification

“…For this reason, modified genetic operators are being developed for a real coded GA aiming an effective exploration of the search space [10]. These modified genetic operators are used in this paper as well as the improvement tools presented in [11].…”

“…They are the main tools for the success of the optimization process and must be implemented in order to allow an effective exploration of the search space. We use an efficient scheme for crossover and mutation for a real coded GA, proposed in [10]. The improvement techniques presented in [11] are also used here: global elitism (which avoids loss of good solutions during the process), dynamic adaptation of crossover and mutation probabilities (variation of the probabilities values according to the population behavior), and reduction of the variables spaces (reduction of the variables ranges to increase the results precision and to facilitate the search toward the global minimum).…”

“…The secondary voltage and the primary current are measured simultaneously with an oscilloscope. The magnetic field is related to the current by (10) The magnetic induction is obtained by time integration of the voltage in the secondary coil: (11) where is the cross section of the Epstein's frame.…”

On the providing signal coverage for a dense map of receivers in Indoor environment using integrating Ray Tracing — Genetic algorithm

“…In this regard, [4,5] propose several optimization methods. Optimization algorithms have already been used to find the location of transmitter antennas [6,7]. However, the methods used in [6,7] have not used a direct link between the method to calculate the received power and the optimization algorithm.…”

“…Optimization algorithms have already been used to find the location of transmitter antennas [6,7]. However, the methods used in [6,7] have not used a direct link between the method to calculate the received power and the optimization algorithm. In other word, both channel calculations and optimization procedure are not accomplished in same software.…”