1. Postgraduate Program in Telecommunications EngineeringFederal Institute of Education, Science and Technology of Ceará—IFCE Fortaleza Ceará Brazil
2. Federal University of Ceará, Campus of the Federal University of Ceará Crateús Brazil
3. Laboratory of Telecommunications and Science and Materials Engineering LOCEM, Department of PhysicsFederal University of Ceará Fortaleza Brazil
4. Department of Exact SciencesFederal University of Pará Cametá Brazil
5. Technology and Science CenterUniversity of Fortaleza—Unifor Fortaleza Brazil