Relationship among resonant frequencies of Sierpinski multiband fractal antennasIvan R. Gonzalez-Rangel, Genaro Hernandez-Valdez, Edgar A. Andrade-Gonzalez, Mario Reyes-Ayala, J. R. Miranda-Tello and Jose Serrano-ChavezITM Web Conf., 9 (2017) 03012DOI: https://doi.org/10.1051/itmconf/20170903012