Humberto D. de Andrade

Effects of Complementary Split Ring Resonator (CSRR) parameters in microstrip patch antenna characteristics

This paper has the objective of study the insertion of a Complementary Split Ring Resonator (CSRR) in the ground plane of a microstrip patch antenna. The return loss, radiation diagram and magnetic field are evaluated according to the variations performed in CSRRs dimension. A good agreement between capacitive effect and the different dimensions used could be observed and an antenna with an effective frequency range filter could be achieved to prevent 802.11a and 802.11n interference, as part of X band frequency.

Radiation efficiency of rectangular slot resonator with multilayers photonic material

This work has as main objective to analyze the rectangular slot resonator with four layers, with photonic materials — PBG, to obtain the complex resonant frequency and radiation efficiency of this structure. The analysis developed in this work was performed using the TTL — Transverse Transmission Line method. Numerical-computational results are presented in graphical form in three dimensions for all analysis performed, and the resonance frequency depending on the length and width of the slot and the radiation efficiency as a function of resonance frequency and height of the layers of substrate structure under study.

Measurement campaign on the electromagnetic environment in the central region of the city of Mossoro

The constant technological innovation in the telecommunications area means that more and more people are exposed to electromagnetic radiation from a variety of sources. The concern with the possible health risks that this exposure can cause in the population motivates many organizations to develop studies with the aim to establish limits of human exposure to this type of radiation. The knowledge of these exposure limits and how these fields are spatially distributed are very important to the development of techniques to protect against this kind of radiation. The aim of this paper is to study the distribution of the electromagnetic pollution in the central region of Mossoro by measuring the intensity of the electromagnetic fields in a broad band from 10 MHz to 8 GHz and estimate how these fields are spatially distributed using interpolations techniques.