Análise do comportamento em campo próximo para antenas de comunicações móveis.

Abstract

With the growing development of mobile communications systems, antennas Transmitters tend to be installed in areas close to areas with a flow of people. Thus, a qualitative and quantitative analysis of the electromagnetic field behavior is necessary, which may, within the near field region, have an appreciable intensity. This work presents a study about the near field, region of the radiating field in which the electromagnetic field oscillates with the distance besides a high intensity in amplitude in relation to the amplitude in the distant field. The analysis covers various types of openings in free space. An antennas are approached by openings, using to analyze usual planning parameters such as the power and gain of an antenna.