Projeto de antena otimizada para realização de testes de compatibilidade eletromagnética em automóveis

Abstract

Considering the technological advances about vehicle construction and the different electromagnetic phenomena, the analysis of Electromagnetic Compatibility in electronic equipment becomes important. This work presents a methodology of design and optimization for antennas to be used in tests of automobile electromagnetic compatibility. Thus, it’s necessary to consider the distribution of the generated electric field by the antennas inside of a small size Semi- Anechoic Chamber. This is an ordinary situation for conditions of test in vehicles according to international standards. In this work, details about the implementation of the optimized antenna are discussed. As a complement, practical results corresponding to the measures made in the FIAT’s Semi- Anechoic Chamber laboratories are presented. Is standing out the comparison of the measurements carried out with the projected antenna, based on the Genetic Algorithms optimization method for conventional antennas. The laboratory obtained data are correlated with results gotten in electromagnetic code. Different aspects about code performance are discussed, verifying the available levels of radiation with each antenna regarding the requirements of the international standard. The correlation between the measurements and simulations presented satisfactory results.