Ricardo MarquéS is a Professor in the Departamento de Electrónica y Electromagnetismo at the Universidad de Sevilla in Spain.

Ferran MartÍN is a Professor in the Departament d'Enginyeria Electr?nica at the Universitat Aut?noma de Barcelona in Spain.

MARIO SOROLLA is a Professor in the Departamento de Ingeniería Eléctrica yElectrónica at the Universidad Pública de Navarra in Spain.

Professors Marqués, Martín, and Sorolla have coauthored more than fifty research works in the field of metamaterials, published in relevant journals and conference proceedings, and have been responsible for various domestic and international projects. They hold several patents related to metamaterial applications.