The frequent advancement of telecommunications related technologies means that more regulatory organisations raise their concern about the possible effects that EM radiation can cause on people. Therefore, several parameters are established with the objective of evaluating if a region is within tolerance limits of radiation. Thus, it is necessary to know these evaluation parameters and how these fields are distributed throughout a region. The aim is to evaluate which method of interpolation, among the studied techniques, has the best performance to estimate accurately the intensity values of electric fields by analysing the parameters mean absolute error and RMS error. The exposure ratio was also verified aiming to check if it was within the limits established by international standards, in the range from 10 MHz to 8 GHz in the central region of the city of Mossoró, Brazil.

This article presents an investigation about the parameters of rectangular microstrip patch antennas with resonators on the antenna's substrate, through a experimental collection, it has been observed a simulation analysis and its verification by measured data. This investigation refers to two arrayed sets on the substrate, the first one with 16 resonators and the second one with 36. The substrate composition of the antenna have been based on the use of split ring resonators, periodically organized on arrays and confined on the substrate. By applying this proposal, it has been made an evaluation of return loss behavior related to the operation frequency, bandwidth, gain, and feature impedance, in which intended to compare the obtained values to each spacial disposition of the resonator elements. The result analysis demonstrated acceptable agreement between simulated and measured values.

A design proposal of a microstrip patch antenna with complementary split ring resonator metamaterial type is presented, and its influence in the antenna parameters are evaluated and compared with a reference designed antenna. The agreement of simulated and measured results of the projected antenna return loss can be observed.ABSTRACT: When evaluating the compliance of a radiocommunication station with the limits of exposure to radiofrequency electromagnetic fields (RF EMF), the technical staff should measure the field at some points near the radiocommunication station. This procedure is usually done using the intuition of the staff. To overcome this fact, this letter shows how to calculate the region of maximum exposure to RF EMF due to a radiocommunication station. The method was tested using measurements made in Bras ılia/Brazil and in Aarhus/Denmark.

This paper presents a directive quasi-Yagi antenna designed to ISM band application at 2.45 GHz. The directors application was analyzed, compared and the better performance antenna was manufactured. The obtained measured results presented an agreement with the performed simulations 1% error and bandwidth 27.39%, from 2.3 GHz to 3.03 GHz.

This paper aims to present microstrip patch antenna prototypes with rectangular patch, where structures of photonic band gap and electromagnetic band gap in cylindrical geometry for different drilling heights were performed in the substrate. The main radiations properties were simulated using Finite Element Method (FEM) and compared with the measured results of the manufactured devices. A current surface reduction can be observed due EBG/PBG insertion and a measurement matching of return loss values, enabling the application on wireless communication. © 2016 Wiley Periodicals, Inc. Microwave Opt Technol Lett 58:2933–2937, 2016